/* roulang page: index */
:root{
    --brand-700:#1B2A5B;
    --brand-600:#24397A;
    --brand-500:#3556A8;
    --star-400:#E8B54B;
    --star-300:#F3D289;
    --leather-600:#8A5A3B;
    --leather-50:#F6EFE8;
    --ink-900:#0E1630;
    --text:#22303F;
    --muted:#5B667A;
    --bg:#F6F7FB;
    --bg-warm:#FBF8F4;
    --surface:#FFFFFF;
    --line:#E4E8F2;
    --ok:#2F8F6B;
    --warn:#C4553F;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:20px;
    --sh-sm:0 1px 2px rgba(14,22,48,.05);
    --sh-md:0 6px 18px rgba(14,22,48,.07);
    --sh-lg:0 18px 45px rgba(14,22,48,.10);
    --container:1200px;
  }
  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:var(--bg);
    overflow-x:hidden;
  }
  img{ max-width:100%; display:block; }
  a{ color:var(--brand-600); text-decoration:none; transition:color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease; }
  a:hover{ color:var(--brand-500); }
  button{ font:inherit; cursor:pointer; }
  h1,h2,h3,h4{ margin:0; color:var(--ink-900); }
  p{ margin:0; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  summary::-webkit-details-marker{ display:none; }
  summary{ list-style:none; cursor:pointer; }
  ::selection{ background:var(--star-300); color:var(--ink-900); }
  :focus-visible{ outline:2px solid var(--star-400); outline-offset:2px; border-radius:6px; }

  .container{ width:100%; max-width:var(--container); margin:0 auto; padding-left:20px; padding-right:20px; }
  @media (min-width:640px){ .container{ padding-left:24px; padding-right:24px; } }
  @media (min-width:1280px){ .container{ padding-left:32px; padding-right:32px; } }

  section[id]{ scroll-margin-top:132px; }
  .section{ padding:56px 0; }
  @media (min-width:640px){ .section{ padding:72px 0; } }
  @media (min-width:1024px){ .section{ padding:104px 0; } }
  .section-warm{ background:var(--bg-warm); }

  .sec-head{ max-width:760px; margin-bottom:36px; }
  .sec-kicker{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13px; letter-spacing:.04em; color:var(--leather-600);
    background:var(--leather-50); border:1px solid #EADFD3;
    padding:5px 12px; border-radius:999px; margin-bottom:14px;
  }
  .sec-title{ font-size:clamp(24px,3vw,36px); line-height:1.25; font-weight:700; letter-spacing:-.01em; }
  .sec-desc{ margin-top:12px; color:var(--muted); font-size:16px; line-height:1.8; }

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky; top:0; z-index:60;
    padding:12px 0 0;
    transition:padding .25s ease;
  }
  .nav-card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:18px;
    box-shadow:var(--sh-sm);
    padding:10px 20px;
    display:flex; align-items:center; gap:18px;
    transition:box-shadow .25s ease, background-color .25s ease;
  }
  .site-header.is-scrolled .nav-card{
    box-shadow:var(--sh-md);
    background:rgba(255,255,255,.94);
    backdrop-filter:blur(8px);
  }
  .logo{ display:flex; align-items:center; gap:10px; flex-shrink:0; }
  .logo-mark{
    width:34px; height:34px; border-radius:11px;
    display:flex; align-items:center; justify-content:center;
    background:linear-gradient(150deg,var(--brand-600),var(--brand-700));
    color:var(--star-300);
    box-shadow:0 4px 12px rgba(27,42,91,.28);
  }
  .logo-text{ display:flex; flex-direction:column; line-height:1.2; }
  .logo-text b{ font-size:16px; color:var(--ink-900); letter-spacing:-.01em; }
  .logo-text span{ font-size:11px; color:var(--muted); letter-spacing:.16em; text-transform:uppercase; }

  .nav-cats{ display:flex; align-items:center; gap:6px; margin-left:auto; }
  .nav-cat{
    display:flex; align-items:center; gap:8px;
    height:48px; padding:0 13px;
    border-radius:12px; border:1px solid transparent;
    font-size:14px; color:var(--text); white-space:nowrap;
  }
  .nav-cat svg{ color:var(--brand-500); transition:color .2s ease; }
  .nav-cat:hover{ border-color:var(--star-400); background:#FDF9EF; color:var(--brand-600); }
  .nav-cat:hover svg{ color:var(--star-400); }
  .nav-cat.active{ border-color:var(--star-400); background:#FBF3E1; color:var(--brand-700); font-weight:600; }
  .nav-cat.active svg{ color:var(--leather-600); }

  .nav-cta{
    flex-shrink:0;
    display:inline-flex; align-items:center; gap:8px;
    height:46px; padding:0 20px; border-radius:12px;
    background:var(--brand-700); color:#fff; font-size:14px; font-weight:600;
    border-bottom:1px solid var(--star-400);
  }
  .nav-cta:hover{ background:var(--brand-600); color:#fff; transform:translateY(-1px); }

  .nav-toggle{
    display:none; margin-left:auto;
    width:44px; height:44px; border-radius:12px;
    border:1px solid var(--line); background:#fff;
    flex-direction:column; align-items:center; justify-content:center; gap:4px;
  }
  .nav-toggle span{ width:18px; height:2px; background:var(--brand-700); border-radius:2px; transition:transform .25s ease, opacity .25s ease; }
  .nav-card.open .nav-toggle span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
  .nav-card.open .nav-toggle span:nth-child(2){ opacity:0; }
  .nav-card.open .nav-toggle span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

  .nav-main{ display:flex; align-items:center; gap:18px; flex:1; }

  /* 锚点条 */
  .anchor-bar{
    display:flex; flex-wrap:wrap; gap:8px; align-items:center;
    padding:12px 20px 0;
  }
  .anchor-pill{
    font-size:13px; color:var(--muted);
    padding:6px 14px; border-radius:999px;
    border:1px solid var(--line); background:rgba(255,255,255,.7);
  }
  .anchor-pill:hover{ color:var(--brand-600); border-color:var(--star-400); background:#FDF9EF; }

  @media (max-width:1023px){
    .nav-toggle{ display:flex; }
    .nav-main{
      display:none;
      position:absolute; top:calc(100% + 10px); left:0; right:0;
      flex-direction:column; align-items:stretch; gap:12px;
      background:#fff; border:1px solid var(--line); border-radius:18px;
      box-shadow:var(--sh-lg); padding:16px;
    }
    .nav-card.open .nav-main{ display:flex; }
    .nav-cats{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-left:0; }
    .nav-cat{ height:52px; justify-content:flex-start; border:1px solid var(--line); }
    .nav-cta{ width:100%; justify-content:center; }
  }
  @media (max-width:520px){
    .nav-cats{ grid-template-columns:1fr; }
    .logo-text span{ display:none; }
  }

  /* ---------- Hero ---------- */
  .hero{
    position:relative;
    margin-top:14px;
    background:linear-gradient(158deg,#0E1630 0%,#1B2A5B 52%,#24397A 100%);
    border-radius:24px;
    overflow:hidden;
    padding:48px 0 52px;
  }
  .hero::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      radial-gradient(rgba(255,255,255,.34) 1px, transparent 1px),
      radial-gradient(rgba(232,181,75,.30) 1px, transparent 1px);
    background-size:62px 62px, 104px 104px;
    background-position:0 0, 30px 38px;
    opacity:.32;
    pointer-events:none;
  }
  .hero-inner{ position:relative; display:grid; grid-template-columns:1fr; gap:36px; align-items:center; }
  @media (min-width:1024px){
    .hero{ padding:72px 0 76px; }
    .hero-inner{ grid-template-columns:7fr 5fr; gap:56px; }
  }
  .hero-badge{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13px; color:var(--star-300);
    border:1px solid rgba(243,210,137,.4);
    background:rgba(232,181,75,.10);
    padding:6px 14px; border-radius:999px; margin-bottom:20px;
  }
  .hero h1{
    color:#fff;
    font-size:clamp(30px,4.4vw,52px);
    line-height:1.15; font-weight:700; letter-spacing:-.01em;
  }
  .hero-sub{ margin-top:18px; color:rgba(255,255,255,.76); font-size:17px; line-height:1.8; max-width:560px; }
  .hero-actions{ display:flex; flex-wrap:wrap; gap:14px; align-items:center; margin-top:30px; }
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    min-height:48px; padding:0 24px; border-radius:12px;
    font-size:15px; font-weight:600; border:1px solid transparent; transition:all .2s ease;
  }
  .btn-primary{ background:var(--brand-500); color:#fff; border-bottom:1px solid var(--star-400); box-shadow:0 8px 22px rgba(53,86,168,.35); }
  .btn-primary:hover{ background:var(--brand-600); color:#fff; transform:translateY(-2px); }
  .btn-secondary{ background:#fff; color:var(--brand-700); border-color:#fff; }
  .btn-secondary:hover{ background:#F2F5FF; color:var(--brand-700); transform:translateY(-2px); }
  .btn-ghost{ background:transparent; color:#fff; border-color:rgba(255,255,255,.44); }
  .btn-ghost:hover{ background:#fff; color:var(--brand-700); border-color:#fff; }
  .hero-link{ color:var(--star-300); font-size:15px; text-decoration:underline; text-underline-offset:4px; }
  .hero-link:hover{ color:#fff; }

  .hero-facts{
    display:flex; flex-wrap:wrap; gap:12px 34px;
    margin-top:38px; padding-top:24px;
    border-top:1px solid rgba(255,255,255,.14);
  }
  .hero-fact{ display:flex; align-items:baseline; gap:8px; }
  .hero-fact b{ font-size:24px; color:var(--star-300); font-weight:700; }
  .hero-fact span{ font-size:13px; color:rgba(255,255,255,.66); }

  .hero-visual{ position:relative; }
  .hero-figure{
    position:relative; border-radius:20px; overflow:hidden;
    aspect-ratio:16 / 11; background:#1B2A5B;
    box-shadow:0 24px 60px rgba(3,8,24,.5);
  }
  .hero-figure img{ width:100%; height:100%; object-fit:cover; }
  .hero-float{
    position:absolute; left:-10px; bottom:-16px;
    background:#fff; border-radius:14px;
    padding:12px 16px; box-shadow:var(--sh-lg);
    display:flex; align-items:center; gap:12px;
    border-left:3px solid var(--star-400);
  }
  .hero-float b{ display:block; font-size:22px; color:var(--brand-700); line-height:1.1; }
  .hero-float span{ font-size:12px; color:var(--muted); }
  @media (max-width:1023px){
    .hero-figure{ margin-top:8px; max-height:240px; }
    .hero-float{ left:12px; bottom:12px; }
  }
  @media (max-width:639px){
    .hero{ padding:36px 0 40px; border-radius:20px; }
    .hero-facts{ flex-wrap:nowrap; overflow-x:auto; gap:22px; padding-bottom:6px; }
    .hero-fact{ flex-shrink:0; }
  }

  /* ---------- 卡片通用 ---------- */
  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--sh-sm);
    padding:24px;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .card:hover{ transform:translateY(-2px); box-shadow:var(--sh-md); border-color:#D6DEEC; }
  .card:hover .card-title{ color:var(--brand-600); }
  .card-title{ font-size:20px; font-weight:600; line-height:1.4; transition:color .2s ease; }
  .card-text{ margin-top:10px; color:var(--muted); font-size:15px; line-height:1.8; }
  .card-icon{
    width:44px; height:44px; border-radius:12px;
    display:flex; align-items:center; justify-content:center;
    background:#EEF2FC; color:var(--brand-600); margin-bottom:16px;
  }
  .badge{
    display:inline-flex; align-items:center; gap:6px;
    font-size:12px; padding:4px 11px; border-radius:999px; line-height:1.6;
  }
  .badge-brand{ background:#EEF2FC; color:var(--brand-600); }
  .badge-leather{ background:var(--leather-50); color:var(--leather-600); }
  .badge-star{ background:#FBF3E1; color:#8A6520; }
  .link-arrow{ display:inline-flex; align-items:center; gap:6px; font-size:14px; font-weight:600; color:var(--brand-600); }
  .link-arrow:hover{ color:var(--leather-600); gap:10px; }

  /* ---------- 卖点区 ---------- */
  .feat-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
  @media (min-width:768px){ .feat-grid{ grid-template-columns:repeat(12,1fr); gap:24px; } }
  .feat-a{ grid-column:span 7; }
  .feat-b{ grid-column:span 5; }
  .feat-c{ grid-column:span 5; }
  .feat-d{ grid-column:span 7; }
  .feat-wide{ grid-column:span 12; }
  .feat-a .card-icon{ background:linear-gradient(150deg,var(--brand-600),var(--brand-700)); color:var(--star-300); width:52px; height:52px; }
  .feat-wide .card{
    display:flex; flex-direction:column; gap:18px;
    background:var(--bg-warm); border-color:#EADFD3;
  }
  @media (min-width:768px){
    .feat-wide .card{ flex-direction:row; align-items:center; justify-content:space-between; padding:28px 32px; }
  }
  .feat-wide p{ max-width:640px; }

  /* ---------- 演示区 ---------- */
  .demo-grid{ display:grid; grid-template-columns:1fr; gap:36px; align-items:start; }
  @media (min-width:1024px){ .demo-grid{ grid-template-columns:6fr 5fr; gap:56px; } }
  .timeline{ position:relative; padding-left:0; }
  .tl-item{ position:relative; display:flex; gap:18px; padding-bottom:32px; }
  .tl-item:last-child{ padding-bottom:0; }
  .tl-num{
    flex-shrink:0;
    width:44px; height:44px; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    background:linear-gradient(150deg,var(--star-400),#D9A233);
    color:#3B2A08; font-weight:700; font-size:17px;
    box-shadow:0 6px 16px rgba(232,181,75,.34);
  }
  .tl-line{ position:absolute; left:21px; top:50px; bottom:0; width:1px; background:linear-gradient(180deg,#E3D5B8,transparent); }
  .tl-item:last-child .tl-line{ display:none; }
  .tl-body h3{ font-size:18px; font-weight:600; }
  .tl-body p{ margin-top:6px; color:var(--muted); font-size:15px; }
  .demo-panel{
    border-radius:20px; overflow:hidden;
    border:1px solid var(--line); background:#fff; box-shadow:var(--sh-lg);
  }
  .demo-panel img{ width:100%; aspect-ratio:16 / 10; object-fit:cover; }
  .demo-panel-body{ padding:20px 22px; }
  .demo-bar{ height:10px; border-radius:999px; background:#EEF2FC; margin-bottom:12px; }
  .demo-bar.w70{ width:70%; }
  .demo-bar.w45{ width:45%; }
  .demo-bar.w88{ width:88%; }

  /* ---------- 证据区 ---------- */
  .stat-row{
    display:grid; grid-template-columns:repeat(2,1fr); gap:0;
    border-top:1px solid var(--line);
  }
  @media (min-width:768px){ .stat-row{ grid-template-columns:repeat(4,1fr); } }
  .stat{
    padding:24px 20px;
    border-bottom:1px solid var(--line);
    border-right:1px solid var(--line);
  }
  .stat:last-child{ border-right:none; }
  .stat b{ display:block; font-size:clamp(28px,3.4vw,38px); font-weight:700; color:var(--brand-700); line-height:1.1; }
  .stat span{ display:block; margin-top:8px; font-size:14px; color:var(--muted); }

  .case-scroll{
    display:flex; gap:20px; overflow-x:auto; padding:6px 2px 20px;
    scroll-snap-type:x mandatory;
  }
  .case-scroll::-webkit-scrollbar{ height:6px; }
  .case-scroll::-webkit-scrollbar-thumb{ background:#CBD4E6; border-radius:999px; }
  .case-card{
    flex:0 0 320px; scroll-snap-align:start;
    background:#fff; border:1px solid var(--line); border-radius:var(--r-md);
    overflow:hidden; box-shadow:var(--sh-sm);
    transition:transform .2s ease, box-shadow .2s ease;
  }
  @media (min-width:1024px){ .case-card{ flex:0 0 356px; } }
  .case-card:hover{ transform:translateY(-3px); box-shadow:var(--sh-md); }
  .case-card img{ width:100%; aspect-ratio:16 / 9; object-fit:cover; }
  .case-body{ padding:18px 20px 20px; }
  .case-body h3{ margin-top:10px; font-size:17px; font-weight:600; line-height:1.45; }
  .case-body p{ margin-top:8px; font-size:14px; color:var(--muted); }

  .logo-wall{
    display:flex; flex-wrap:wrap; gap:14px 28px; align-items:center;
    margin-top:28px; padding-top:28px; border-top:1px solid var(--line);
  }
  .logo-wall span{
    font-size:15px; font-weight:600; color:#A9B2C4;
    filter:grayscale(1); transition:color .2s ease, filter .2s ease;
  }
  .logo-wall span:hover{ color:var(--brand-600); filter:none; }

  /* ---------- 价格区 ---------- */
  .price-grid{ display:grid; grid-template-columns:1fr; gap:22px; align-items:stretch; }
  @media (min-width:768px){ .price-grid{ grid-template-columns:repeat(3,1fr); gap:24px; } }
  .price-card{
    position:relative;
    background:#fff; border:1px solid var(--line); border-radius:var(--r-lg);
    padding:30px 26px; display:flex; flex-direction:column;
    box-shadow:var(--sh-sm); transition:transform .2s ease, box-shadow .2s ease;
  }
  .price-card:hover{ transform:translateY(-3px); box-shadow:var(--sh-md); }
  .price-card.featured{
    border:2px solid var(--brand-500);
    box-shadow:var(--sh-lg);
    transform:translateY(-6px);
  }
  .price-card.featured:hover{ transform:translateY(-8px); }
  .price-flag{
    position:absolute; top:-13px; right:22px;
    background:var(--star-400); color:#3B2A08;
    font-size:12px; font-weight:700; padding:4px 12px; border-radius:999px;
  }
  .price-name{ font-size:18px; font-weight:600; }
  .price-amount{ margin-top:16px; display:flex; align-items:baseline; gap:6px; }
  .price-amount b{ font-size:42px; font-weight:700; color:var(--ink-900); line-height:1; letter-spacing:-.02em; }
  .price-amount span{ font-size:14px; color:var(--muted); }
  .price-list{ margin:22px 0 26px; display:flex; flex-direction:column; gap:11px; }
  .price-list li{ display:flex; gap:10px; align-items:flex-start; font-size:15px; color:var(--text); line-height:1.7; }
  .price-list svg{ flex-shrink:0; margin-top:5px; color:var(--ok); }
  .price-card .btn{ margin-top:auto; width:100%; }
  .price-note{ margin-top:22px; font-size:13.5px; color:var(--muted); line-height:1.8; }

  /* ---------- 最新信息 ---------- */
  .news-head{ display:flex; flex-wrap:wrap; gap:16px; align-items:flex-end; justify-content:space-between; margin-bottom:32px; }
  .news-grid{ display:grid; grid-template-columns:1fr; gap:22px; }
  @media (min-width:640px){ .news-grid{ grid-template-columns:repeat(2,1fr); } }
  @media (min-width:1024px){ .news-grid{ grid-template-columns:repeat(3,1fr); gap:24px; } }
  .news-card{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-md);
    overflow:hidden; box-shadow:var(--sh-sm); display:flex; flex-direction:column;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .news-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-md); border-color:#D6DEEC; }
  .news-card:hover .news-title a{ color:var(--brand-600); }
  .news-thumb{ display:block; aspect-ratio:16 / 9; overflow:hidden; background:#EEF2FC; }
  .news-thumb img{ width:100%; height:100%; object-fit:cover; transition:transform .35s ease; }
  .news-card:hover .news-thumb img{ transform:scale(1.04); }
  .news-body{ padding:18px 20px 20px; display:flex; flex-direction:column; gap:10px; flex:1; }
  .news-title{ font-size:17px; font-weight:600; line-height:1.5; }
  .news-title a{ color:var(--ink-900); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
  .news-excerpt{
    font-size:14px; color:var(--muted); line-height:1.75;
    display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden;
  }
  .news-meta{
    margin-top:auto; padding-top:12px; border-top:1px solid var(--line);
    display:flex; align-items:center; justify-content:space-between; gap:12px;
  }
  .news-meta time{ font-size:13px; color:#8C97AC; }
  .empty-state{
    min-height:220px; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:14px;
    background:#fff; border:1px dashed #D6DEEC; border-radius:var(--r-md);
    text-align:center; padding:36px 24px; color:var(--muted);
  }
  .empty-state svg{ color:#B4BECF; }
  .empty-state p{ font-size:15px; }

  /* ---------- FAQ ---------- */
  .faq-grid{ display:grid; grid-template-columns:1fr; gap:32px; align-items:start; }
  @media (min-width:1024px){ .faq-grid{ grid-template-columns:5fr 7fr; gap:56px; } }
  .faq-aside{ position:sticky; top:132px; }
  @media (max-width:1023px){ .faq-aside{ position:static; } }
  .faq-help{
    margin-top:24px; background:var(--leather-50); border:1px solid #EADFD3;
    border-radius:var(--r-md); padding:20px 22px;
  }
  .faq-help p{ font-size:14px; color:var(--leather-600); margin-bottom:12px; }
  .faq-item{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-sm);
    margin-bottom:12px; overflow:hidden; transition:border-color .2s ease, box-shadow .2s ease;
  }
  .faq-item:hover{ border-color:#D6DEEC; box-shadow:var(--sh-sm); }
  .faq-item[open]{ border-color:var(--star-400); box-shadow:var(--sh-sm); }
  .faq-q{
    display:flex; align-items:center; justify-content:space-between; gap:16px;
    padding:18px 20px; font-size:16.5px; font-weight:600; color:var(--ink-900); line-height:1.6;
  }
  .faq-icon{
    flex-shrink:0; width:28px; height:28px; border-radius:50%;
    border:1px solid var(--line); color:var(--muted);
    display:flex; align-items:center; justify-content:center;
    font-size:16px; line-height:1; transition:transform .22s ease, color .22s ease, border-color .22s ease;
  }
  .faq-icon::before{ content:"+"; }
  .faq-item[open] .faq-icon{ transform:rotate(180deg); color:var(--star-400); border-color:var(--star-400); }
  .faq-item[open] .faq-icon::before{ content:"–"; }
  .faq-a{ padding:0 20px 20px; font-size:15px; color:var(--muted); line-height:1.85; }

  /* ---------- 底部 CTA ---------- */
  .cta-band{
    position:relative; overflow:hidden;
    background:linear-gradient(150deg,#0E1630 0%,#1B2A5B 62%,#24397A 100%);
    border-radius:24px; padding:44px 28px;
  }
  .cta-band::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      radial-gradient(rgba(255,255,255,.3) 1px, transparent 1px),
      radial-gradient(rgba(232,181,75,.26) 1px, transparent 1px);
    background-size:58px 58px, 92px 92px;
    background-position:0 0, 26px 32px;
    opacity:.3; pointer-events:none;
  }
  .cta-inner{ position:relative; display:grid; grid-template-columns:1fr; gap:26px; }
  @media (min-width:1024px){ .cta-inner{ grid-template-columns:7fr 5fr; align-items:center; gap:48px; } .cta-band{ padding:56px 48px; } }
  .cta-band h2{ color:#fff; font-size:clamp(24px,3vw,34px); line-height:1.3; }
  .cta-band p{ margin-top:12px; color:rgba(255,255,255,.74); font-size:16px; line-height:1.8; }
  .cta-actions{ display:flex; flex-wrap:wrap; gap:14px; }
  .cta-contact{
    margin-top:20px; font-size:14px; color:rgba(255,255,255,.6);
    display:flex; flex-wrap:wrap; gap:8px 20px;
  }

  /* ---------- 页脚 ---------- */
  .site-footer{ background:#0B1226; color:#B9C2D6; margin-top:64px; }
  .footer-grid{
    display:grid; grid-template-columns:1fr; gap:36px;
    padding:56px 0 36px;
  }
  @media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,1fr); } }
  @media (min-width:1024px){ .footer-grid{ grid-template-columns:4fr 3fr 3fr 3fr; gap:40px; padding:72px 0 48px; } }
  .footer-brand{ display:flex; align-items:center; gap:10px; margin-bottom:16px; }
  .footer-brand b{ color:#fff; font-size:16px; }
  .footer-text{ font-size:14px; line-height:1.9; color:#8E99B0; max-width:320px; }
  .social-row{ display:flex; gap:10px; margin-top:18px; }
  .social-row a{
    width:38px; height:38px; border-radius:11px;
    display:flex; align-items:center; justify-content:center;
    border:1px solid rgba(255,255,255,.14); color:#B9C2D6;
  }
  .social-row a:hover{ color:var(--star-300); border-color:var(--star-400); transform:translateY(-2px); }
  .footer-col h3{
    font-size:12px; letter-spacing:.18em; text-transform:uppercase;
    color:#7C87A0; font-weight:600; margin-bottom:18px;
  }
  .footer-col h3 span{ text-transform:none; letter-spacing:.06em; margin-left:6px; color:#A7B1C6; }
  .footer-links li{ margin-bottom:11px; }
  .footer-links a{ color:#B9C2D6; font-size:14.5px; display:inline-block; }
  .footer-links a:hover{ color:var(--star-300); transform:translateX(2px); }
  .footer-contact li{ font-size:14.5px; line-height:1.8; margin-bottom:11px; color:#B9C2D6; }
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);
    padding:20px 0 88px;
    display:flex; flex-wrap:wrap; gap:10px 24px; justify-content:space-between;
    font-size:13px; color:#7C87A0;
  }

  /* ---------- 浮动 CTA ---------- */
  .float-cta{
    position:fixed; right:16px; bottom:16px; z-index:70;
    display:inline-flex; align-items:center; gap:8px;
    height:50px; padding:0 20px; border-radius:999px;
    background:var(--brand-700); color:#fff; font-size:14px; font-weight:600;
    box-shadow:0 12px 30px rgba(14,22,48,.32);
    border-bottom:1px solid var(--star-400);
    opacity:0; visibility:hidden; transform:translateY(10px);
    transition:opacity .3s ease, transform .3s ease, visibility .3s ease, background-color .2s ease;
  }
  .float-cta.is-visible{ opacity:1; visibility:visible; transform:translateY(0); }
  .float-cta:hover{ background:var(--brand-600); color:#fff; }
  @media (max-width:520px){ .float-cta{ height:46px; padding:0 16px; font-size:13px; } }

/* roulang page: article */
:root{
  --brand-700:#1B2A5B; --brand-600:#24397A; --brand-500:#3556A8;
  --brand-100:#E7EDFA; --brand-50:#F1F5FD;
  --star-400:#E8B54B; --star-300:#F3D289;
  --leather-600:#8A5A3B; --leather-50:#F6EFE8;
  --ink-900:#0E1630; --text:#22303F; --muted:#5B667A;
  --bg:#F6F7FB; --bg-warm:#FBF8F4; --surface:#FFFFFF; --line:#E4E8F2;
  --ok:#2F8F6B; --warn:#C4553F;
  --r-sm:12px; --r-md:16px; --r-lg:20px;
  --sh-sm:0 1px 2px rgba(14,22,48,.05);
  --sh-md:0 6px 18px rgba(14,22,48,.07);
  --sh-lg:0 18px 45px rgba(14,22,48,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;padding:0 0 72px;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
.site-body img{max-width:100%;display:block}
.site-body a{color:inherit;text-decoration:none}
.site-body button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
.site-body ul,.site-body ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:6px}
::selection{background:var(--star-300);color:var(--ink-900)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#CBD3E6;border-radius:999px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#AEB9D4}
::-webkit-scrollbar-track{background:var(--bg)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:640px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}
.section{padding:56px 0}
@media(min-width:640px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-sm);font-size:15px;font-weight:600;letter-spacing:0;transition:all .2s ease;border:1px solid transparent;white-space:nowrap}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--brand-700);box-shadow:0 1px 0 0 var(--star-400) inset,var(--sh-md);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:#C9D5F2}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-500)}
.btn-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-dark:hover{background:#fff;color:var(--brand-700);border-color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.55;box-shadow:none;cursor:not-allowed}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.6}
.badge-brand{background:var(--brand-100);color:var(--brand-700)}
.badge-leather{background:var(--leather-50);color:var(--leather-600)}
.badge-star{background:rgba(232,181,75,.16);color:#8A6516}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;list-style:none}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;color:var(--muted);transition:all .2s ease}
.tag:hover{border-color:var(--star-400);color:var(--brand-700);background:var(--bg-warm)}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 0}
.nav-card{
  position:relative;display:flex;align-items:center;gap:18px;padding:10px 20px;
  background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-md);transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled .nav-card{box-shadow:var(--sh-lg);background:#fff}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;color:var(--star-300);background:linear-gradient(140deg,var(--brand-600),var(--ink-900));box-shadow:var(--sh-sm)}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text b{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:.06em}
.nav-main{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav-cats{display:flex;align-items:center;gap:6px;list-style:none}
.nav-cat{
  display:inline-flex;align-items:center;gap:7px;height:46px;padding:0 12px;border-radius:12px;
  border:1px solid transparent;font-size:13.5px;font-weight:500;color:#3A465C;white-space:nowrap;
  transition:all .2s ease;
}
.nav-cat svg{color:var(--brand-500);transition:color .2s ease}
.nav-cat:hover{background:var(--bg-warm);border-color:var(--star-300);color:var(--brand-700)}
.nav-cat:hover svg{color:var(--star-400)}
.nav-cat.active{background:var(--brand-50);border-color:#C9D5F2;color:var(--brand-700);font-weight:600}
.nav-cta{flex:0 0 auto}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:5px;margin-left:auto}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-700);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:1023px){
  .nav-toggle{display:flex}
  .nav-main{
    position:absolute;top:calc(100% + 12px);left:0;right:0;display:none;flex-direction:column;
    align-items:stretch;gap:14px;padding:16px;background:#fff;border:1px solid var(--line);
    border-radius:16px;box-shadow:var(--sh-lg);
  }
  .nav-main.open{display:flex}
  .nav-cats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .nav-cat{height:auto;min-height:52px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;font-size:13px;line-height:1.35;white-space:normal}
  .nav-cta{width:100%}
}

/* ---------- 页头 Banner ---------- */
.page-hero{position:relative;margin-top:20px;border-radius:24px;overflow:hidden;color:#fff;
  background:linear-gradient(180deg,rgba(14,22,48,.90),rgba(27,42,91,.94)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  box-shadow:var(--sh-lg);
}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.16;
  background-image:radial-gradient(rgba(232,181,75,.75) 1px,transparent 1px);background-size:34px 34px}
.page-hero .container{position:relative;z-index:1;padding-top:38px;padding-bottom:40px}
@media(min-width:1024px){.page-hero .container{padding-top:54px;padding-bottom:56px}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(226,233,255,.78);margin-bottom:18px}
.breadcrumb a{color:rgba(226,233,255,.9);border-bottom:1px solid rgba(226,233,255,.28);transition:color .2s ease}
.breadcrumb a:hover{color:var(--star-300);border-color:var(--star-300)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:#fff;font-weight:500}
.page-hero h1{font-size:clamp(26px,3.6vw,42px);line-height:1.22;font-weight:700;letter-spacing:-.01em;margin:14px 0 18px;max-width:920px;color:#fff}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:rgba(222,230,250,.82);list-style:none}
.meta-row li{display:inline-flex;align-items:center;gap:7px}
.meta-row svg{color:var(--star-400)}

/* ---------- 文章主体 ---------- */
.article-section{padding-top:48px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:28px}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}
}
.article-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm);padding:26px 20px}
@media(min-width:640px){.article-card{padding:34px 30px}}
@media(min-width:1024px){.article-card{padding:40px 44px}}
.article-body{max-width:780px}

.article-prose{font-size:17px;line-height:1.85;color:#25313F;word-break:break-word}
@media(min-width:768px){.article-prose{font-size:17.5px}}
.article-prose p{margin:0 0 1.2em}
.article-prose h2{font-size:clamp(20px,2.4vw,24px);line-height:1.35;font-weight:700;color:var(--ink-900);margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand-500);scroll-margin-top:110px}
.article-prose h3{font-size:19px;line-height:1.4;font-weight:600;color:var(--ink-900);margin:28px 0 12px;scroll-margin-top:110px}
.article-prose h4{font-size:17px;font-weight:600;margin:22px 0 10px;color:var(--ink-900)}
.article-prose ul,.article-prose ol{margin:0 0 1.2em;padding-left:1.5em}
.article-prose ul li{list-style:disc}
.article-prose ol li{list-style:decimal}
.article-prose li{margin:.45em 0}
.article-prose blockquote{margin:22px 0;padding:14px 20px;border-left:4px solid var(--brand-500);background:var(--brand-50);border-radius:0 12px 12px 0;color:#39465C}
.article-prose blockquote p:last-child{margin-bottom:0}
.article-prose img{border-radius:12px;margin:22px auto;height:auto}
.article-prose figure{margin:22px 0}
.article-prose figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:8px}
.article-prose table{width:100%;min-width:520px;border-collapse:collapse;font-size:15px;background:#fff}
.article-prose th,.article-prose td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;line-height:1.6}
.article-prose thead th{background:var(--bg-warm);color:var(--ink-900);font-weight:600}
.article-prose tbody tr:nth-child(even){background:#FAFBFE}
.article-prose .table-scroll,.article-prose>div:has(table){overflow-x:auto}
.article-prose a{color:var(--brand-600);border-bottom:1px solid rgba(53,86,168,.35);transition:color .2s ease,border-color .2s ease}
.article-prose a:hover{color:var(--brand-700);border-color:var(--star-400)}
.article-prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.article-prose code{background:var(--bg-warm);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:14.5px}

/* ---------- 文末延伸 ---------- */
.article-foot{margin-top:26px;padding-top:22px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:20px}
.foot-block-title{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.04em;margin:0 0 10px}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.share-btn{display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13.5px;color:#3A465C;transition:all .2s ease}
.share-btn:hover{border-color:var(--star-400);color:var(--brand-700);background:var(--bg-warm);transform:translateY(-1px)}
.share-btn svg{color:var(--brand-500)}

.post-nav{display:grid;gap:16px;margin-top:28px}
@media(min-width:640px){.post-nav{grid-template-columns:1fr 1fr}}
.post-nav-card{display:flex;flex-direction:column;gap:8px;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);transition:all .2s ease}
.post-nav-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#C9D5F2}
.post-nav-card:hover b{color:var(--brand-600)}
.post-nav-card .pn-label{font-size:12.5px;color:var(--muted);letter-spacing:.04em}
.post-nav-card b{font-size:15.5px;line-height:1.55;color:var(--ink-900);transition:color .2s ease}
.post-nav-card.next{text-align:right}

.back-link{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--brand-600);margin-top:22px;transition:gap .2s ease,color .2s ease}
.back-link:hover{color:var(--brand-700);gap:11px}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px}
@media(min-width:1024px){.article-side{position:sticky;top:104px}}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);padding:20px}
.side-card h2{font-size:15px;font-weight:700;color:var(--ink-900);margin:0 0 14px;display:flex;align-items:center;gap:8px}
.side-card h2 svg{color:var(--star-400)}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:4px;max-height:320px;overflow-y:auto}
.toc-list a{display:block;font-size:13.8px;line-height:1.6;color:var(--muted);padding:7px 10px;border-radius:10px;border-left:2px solid transparent;transition:all .2s ease}
.toc-list a:hover{color:var(--brand-700);background:var(--brand-50);border-left-color:var(--star-400)}
.toc-empty{font-size:13.5px;color:var(--muted);line-height:1.7}
.side-links{list-style:none;display:flex;flex-direction:column;gap:2px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:10px;font-size:14px;color:#3A465C;transition:all .2s ease}
.side-links a span.arw{color:#B9C3D8;transition:transform .2s ease,color .2s ease}
.side-links a:hover{background:var(--brand-50);color:var(--brand-700)}
.side-links a:hover span.arw{color:var(--brand-500);transform:translateX(3px)}
.side-cta{background:linear-gradient(150deg,var(--brand-700),var(--ink-900));border:0;color:#fff}
.side-cta h2{color:#fff}
.side-cta p{font-size:13.8px;line-height:1.75;color:rgba(222,230,250,.85);margin:0 0 16px}
.side-cta .btn{width:100%}

/* ---------- 空态 ---------- */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px;min-height:260px;padding:36px 22px;background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm)}
.empty-state svg{color:var(--brand-500)}
.empty-title{font-size:19px;font-weight:700;color:var(--ink-900);margin:0}
.empty-desc{font-size:14.5px;color:var(--muted);max-width:420px;margin:0 0 8px}

/* ---------- 相关推荐 ---------- */
.sub-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:26px}
.sub-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;color:var(--ink-900);margin:0}
.sub-head p{font-size:14.5px;color:var(--muted);margin:6px 0 0}
.sub-head .more{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;transition:gap .2s ease}
.sub-head .more:hover{gap:10px;color:var(--brand-700)}
.card-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:640px){.card-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-sm);transition:all .2s ease}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#D6DEF0}
.post-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-50)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:16.5px;line-height:1.5;font-weight:600;color:var(--ink-900);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease}
.post-card:hover h3{color:var(--brand-600)}
.post-card .excerpt{font-size:14px;line-height:1.75;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:6px}
.post-card .date{font-size:12.5px;color:#8892AB}
.post-card .read{font-size:13.5px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:5px;transition:gap .2s ease}
.post-card:hover .read{gap:9px}

/* ---------- 底部 CTA ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:24px;color:#fff;background:linear-gradient(140deg,#0E1630,#1B2A5B 62%,#24397A);box-shadow:var(--sh-lg);padding:44px 26px}
@media(min-width:1024px){.cta-band{padding:56px 52px}}
.cta-band::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.18;
  background-image:radial-gradient(rgba(232,181,75,.8) 1px,transparent 1px);background-size:32px 32px}
.cta-inner{position:relative;z-index:1;display:grid;gap:26px}
@media(min-width:1024px){.cta-inner{grid-template-columns:1.4fr 1fr;align-items:center;gap:40px}}
.cta-inner h2{font-size:clamp(22px,2.8vw,34px);line-height:1.28;font-weight:700;margin:0 0 12px;color:#fff}
.cta-inner p{font-size:15px;line-height:1.8;color:rgba(222,230,250,.86);margin:0}
.cta-actions{display:flex;flex-direction:column;gap:12px}
@media(min-width:640px){.cta-actions{flex-direction:row;flex-wrap:wrap}}
.cta-contact{margin-top:16px;font-size:13.5px;color:rgba(196,206,232,.8);display:flex;flex-wrap:wrap;gap:8px 20px}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:80px;background:var(--ink-900);color:#A9B2CC}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:60px 0 40px}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:70px 0 44px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px}
.footer-brand .logo-mark{background:linear-gradient(140deg,var(--brand-500),var(--brand-700))}
.footer-text{font-size:14px;line-height:1.85;color:#98A2BE;margin:16px 0 20px;max-width:340px}
.social-row{display:flex;gap:10px}
.social-row a{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.14);color:#C7CDE0;transition:all .2s ease}
.social-row a:hover{color:var(--star-400);border-color:var(--star-400);transform:translateY(-2px)}
.footer-col h3{font-size:13px;font-weight:600;color:#fff;margin:0 0 16px;letter-spacing:.04em}
.footer-col h3 span{font-size:11px;font-weight:400;color:#7C86A6;margin-left:6px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-links a,.footer-links li{display:inline-block;font-size:14px;color:#A9B2CC;transition:all .2s ease}
.footer-links a:hover{color:var(--star-400);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0 28px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#8892B0}
.footer-bottom a{color:#A9B2CC}
.footer-bottom a:hover{color:var(--star-400)}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:16px;bottom:16px;z-index:70;display:inline-flex;align-items:center;gap:8px;
  padding:12px 18px;border-radius:999px;background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;
  box-shadow:var(--sh-lg);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s ease}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--brand-700)}
.float-cta svg{color:var(--star-300)}
@media(max-width:520px){.float-cta{right:12px;bottom:12px;padding:11px 15px;font-size:13px}}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,14px);z-index:90;background:var(--ink-900);color:#fff;
  font-size:13.5px;padding:10px 18px;border-radius:999px;box-shadow:var(--sh-lg);opacity:0;visibility:hidden;transition:all .28s ease}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* roulang page: category1 */
*,*::before,*::after{box-sizing:border-box}
:root{
  --brand-700:#1B2A5B;
  --brand-600:#24397A;
  --brand-500:#3556A8;
  --star-400:#E8B54B;
  --star-300:#F3D289;
  --leather-600:#8A5A3B;
  --leather-50:#F6EFE8;
  --ink-900:#0E1630;
  --text:#22303F;
  --muted:#5B667A;
  --bg:#F6F7FB;
  --bg-warm:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E4E8F2;
  --success:#2F8F6B;
  --warn:#C4553F;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --shadow-sm:0 1px 2px rgba(14,22,48,.05);
  --shadow-md:0 6px 18px rgba(14,22,48,.07);
  --shadow-lg:0 18px 45px rgba(14,22,48,.10);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-0.01em}
p{margin:0}
::selection{background:var(--star-300);color:var(--ink-900)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#C9D1E4;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#AFBAD2}
::-webkit-scrollbar-track{background:transparent}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:8px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:104px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--surface)}
.section-warm{background:var(--bg-warm)}
.section[id]{scroll-margin-top:132px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 0;background:linear-gradient(180deg,var(--bg) 72%,rgba(246,247,251,0))}
.nav-card{
  position:relative;display:flex;align-items:center;gap:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  padding:12px 20px;box-shadow:var(--shadow-sm);
  transition:box-shadow .25s ease,transform .25s ease;
}
.nav-card.scrolled{box-shadow:var(--shadow-md)}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  display:flex;align-items:center;justify-content:center;color:var(--star-300);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:15px;color:var(--ink-900);font-weight:700;letter-spacing:-.01em}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:.1em;text-transform:uppercase}
.nav-cats{display:flex;align-items:center;gap:4px;list-style:none;flex-wrap:nowrap}
.nav-cat{
  display:flex;align-items:center;gap:7px;height:44px;padding:0 12px;border-radius:12px;
  font-size:14px;color:var(--muted);border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.nav-cat svg{color:#8A94AC;transition:color .2s ease;flex:0 0 auto}
.nav-cat:hover{color:var(--brand-600);background:#F8FAFF;border-color:var(--star-300)}
.nav-cat:hover svg{color:var(--star-400)}
.nav-cat.active{color:var(--brand-700);background:#EEF2FF;border-color:#D5DEFB;font-weight:600}
.nav-cat.active svg{color:var(--brand-600)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:#F8FAFF;border:1px solid var(--line);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-600);transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.subnav{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.subnav a{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);font-size:13px;color:var(--muted);
  transition:.2s ease;
}
.subnav a:hover{border-color:var(--star-300);color:var(--brand-600)}
.subnav a.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn svg{flex:0 0 auto}
.btn-primary{background:var(--brand-600);color:#fff;border-bottom:1px solid var(--star-400);box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:#C9D5F2}
.btn-ghost:hover{background:#EEF2FF;border-color:var(--brand-500)}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-light:hover{background:#fff;color:var(--brand-700);border-color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:12px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.55;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;letter-spacing:.01em;
}
.badge-brand{background:#EEF2FF;color:var(--brand-700);border:1px solid #DCE4FB}
.badge-leather{background:var(--leather-50);color:var(--leather-600);border:1px solid #EBDDD0}
.badge-star{background:#FDF4E1;color:#8A6114;border:1px solid #F5E3BC}

/* ---------- 页头区 ---------- */
.page-hero{padding:64px 0 48px;background:linear-gradient(180deg,#FFFFFF 0%,rgba(246,247,251,0) 100%)}
.breadcrumb{margin-bottom:20px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;font-size:13px;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"›";color:#B9C2D6}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb [aria-current="page"]{color:var(--ink-900);font-weight:600}
.page-hero h1{margin:16px 0 0;font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:700}
.page-hero .lead{margin-top:18px;max-width:760px;font-size:17px;color:var(--muted);line-height:1.85}
.stat-row{display:flex;flex-wrap:wrap;gap:0;margin-top:32px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm)}
.stat-item{flex:1 1 180px;padding:20px 24px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0}
.stat-item b{display:block;font-size:24px;color:var(--brand-700);line-height:1.25;letter-spacing:-.01em}
.stat-item span{font-size:13px;color:var(--muted)}

/* ---------- 图文两栏 ---------- */
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.25;font-weight:700}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-600);font-weight:600;margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--star-400)}
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.split+.split{margin-top:80px}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-md)}
.split-body h2{font-size:clamp(22px,2.4vw,32px);line-height:1.3;font-weight:700}
.split-body p{margin-top:16px;color:var(--muted)}
.split-reverse .split-media{order:2}
.check-list{list-style:none;margin-top:22px;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text)}
.check-list .tick{
  flex:0 0 auto;width:22px;height:22px;border-radius:999px;margin-top:4px;
  background:#EEF2FF;color:var(--brand-600);display:flex;align-items:center;justify-content:center;
}
.check-list strong{color:var(--ink-900)}

/* ---------- 时间线 ---------- */
.timeline{list-style:none;position:relative;margin-top:8px;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:19px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,var(--star-300),#DDE3F2);
}
.timeline-item{position:relative;padding-left:68px;margin-bottom:22px}
.timeline-item:last-child{margin-bottom:0}
.timeline-dot{
  position:absolute;left:0;top:6px;width:40px;height:40px;border-radius:999px;
  background:var(--surface);border:2px solid var(--star-400);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
  box-shadow:var(--shadow-sm);
}
.timeline-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.timeline-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D8E0F5}
.timeline-card h3{font-size:18px;font-weight:600;line-height:1.4}
.timeline-card p{margin-top:8px;font-size:15px;color:var(--muted)}
.timeline-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ---------- 要点卡 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.point-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D8E0F5}
.point-icon{
  width:42px;height:42px;border-radius:12px;background:#EEF2FF;color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.point-card h3{margin-top:12px;font-size:18px;font-weight:600;line-height:1.45;transition:color .2s ease}
.point-card:hover h3{color:var(--brand-600)}
.point-card p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.8}
.arrow-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13px;font-weight:600;color:var(--brand-600)}
.arrow-link svg{transition:transform .2s ease}
.point-card:hover .arrow-link svg{transform:translateX(3px)}
@media (min-width:1024px){
  .card-grid .point-card:nth-child(2),.card-grid .point-card:nth-child(5){transform:translateY(22px)}
  .card-grid .point-card:nth-child(2):hover,.card-grid .point-card:nth-child(5):hover{transform:translateY(20px)}
}

/* ---------- 对照表 ---------- */
.table-wrap{
  margin-top:8px;overflow-x:auto;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);
}
.data-table{width:100%;min-width:760px;border-collapse:collapse}
.data-table th{
  text-align:left;padding:16px 22px;font-size:13px;font-weight:600;color:var(--muted);
  background:#F9FAFE;border-bottom:1px solid var(--line);white-space:nowrap;
}
.data-table td{padding:16px 22px;font-size:15px;border-bottom:1px solid #EEF1F8;vertical-align:top;min-height:44px}
.data-table tbody tr:nth-child(even){background:#FCFDFF}
.data-table tbody tr:hover{background:#F6F8FF}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table .cell-strong{color:var(--ink-900);font-weight:600}
.table-note{margin-top:14px;font-size:13px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:330px 1fr;gap:52px;align-items:start}
.faq-aside{position:sticky;top:140px}
.faq-aside h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:700}
.faq-aside p{margin-top:14px;color:var(--muted);font-size:15px}
.help-card{
  margin-top:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--shadow-sm);
}
.help-card h3{font-size:16px;font-weight:600}
.help-card p{margin-top:8px;font-size:14px;color:var(--muted)}
.help-card .btn{margin-top:16px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#D5DEFB;box-shadow:var(--shadow-md)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16.5px;font-weight:600;color:var(--ink-900);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:999px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--muted);
  font-size:15px;line-height:1;transition:transform .22s ease,color .22s ease,border-color .22s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);color:var(--star-400);border-color:var(--star-400)}
.faq-answer{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.85}

/* ---------- 互链卡 ---------- */
.link-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.link-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D8E0F5}
.link-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.link-card-body{padding:18px 20px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.link-card-body h3{margin-top:10px;font-size:17px;font-weight:600;line-height:1.45;transition:color .2s ease}
.link-card:hover h3{color:var(--brand-600)}
.link-card-body p{margin-top:8px;font-size:14px;color:var(--muted);flex:1 1 auto}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;color:#fff;padding:80px 0;
  background:linear-gradient(135deg,var(--ink-900) 0%,var(--brand-700) 62%,var(--brand-600) 100%);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
  background-image:
    radial-gradient(rgba(255,255,255,.40) 1px,transparent 1.4px),
    radial-gradient(rgba(232,181,75,.34) 1px,transparent 1.4px);
  background-size:130px 130px,190px 190px;
  background-position:0 0,64px 58px;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,36px);line-height:1.25;font-weight:700}
.cta-inner p{margin-top:14px;max-width:560px;color:#C7D0E6;font-size:15.5px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-meta{position:relative;margin-top:28px;display:flex;flex-wrap:wrap;gap:20px;font-size:13.5px;color:#9EABC8}
.cta-meta span{display:inline-flex;align-items:center;gap:8px}
.cta-meta svg{color:var(--star-400)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#C8D0E4;padding:68px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:46px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:16px}
.footer-text{font-size:14px;line-height:1.85;color:#98A3BF;max-width:360px}
.footer-col h3{font-size:13px;color:#fff;font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-col h3 span{font-size:11px;color:#6C7796;margin-left:6px;text-transform:uppercase;letter-spacing:.08em;font-weight:500}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-links li{font-size:14px;color:#98A3BF}
.footer-links a{font-size:14px;color:#A9B3CD;transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-links a:hover{color:var(--star-400);transform:translateX(2px)}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  width:36px;height:36px;border-radius:11px;border:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:center;color:#C8D0E4;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.social-row a:hover{color:var(--star-400);border-color:var(--star-400);transform:translateY(-2px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7E8AA8;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:16px;bottom:16px;z-index:80;
  display:inline-flex;align-items:center;gap:8px;height:50px;padding:0 20px;
  border-radius:999px;background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,background .2s ease;
}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--brand-700)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .nav-toggle{display:flex}
  .nav-main{
    position:absolute;left:0;right:0;top:calc(100% + 12px);
    display:none;flex-direction:column;gap:14px;
    background:var(--surface);border:1px solid var(--line);border-radius:18px;
    box-shadow:var(--shadow-lg);padding:16px;
  }
  .nav-main.open{display:flex}
  .nav-cats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
  .nav-cat{height:54px;justify-content:flex-start;padding:0 14px;background:#F9FAFE;border-color:var(--line);font-size:13.5px}
  .nav-cta{margin-left:0}
  .nav-cta .btn{width:100%}
  .subnav{display:none}
  .page-hero{padding:44px 0 36px}
  .split{grid-template-columns:1fr;gap:28px}
  .split+.split{margin-top:56px}
  .split-reverse .split-media{order:0}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid .point-card:nth-child(2),.card-grid .point-card:nth-child(5){transform:none}
  .card-grid .point-card:nth-child(2):hover,.card-grid .point-card:nth-child(5):hover{transform:translateY(-2px)}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .link-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .cta-band{padding:64px 0}
  .stat-item{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--line)}
  .stat-item:last-child{border-bottom:0}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .page-hero h1{font-size:28px}
  .page-hero .lead{font-size:15.5px}
  .card-grid{grid-template-columns:1fr}
  .link-cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .timeline-item{padding-left:60px}
  .timeline-dot{width:36px;height:36px;font-size:14px}
  .timeline::before{left:17px}
  .faq-item summary{font-size:15.5px;padding:16px 18px}
  .faq-answer{padding:0 18px 18px}
  .site-footer{padding-bottom:64px}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* roulang page: category3 */
:root{
  --brand-700:#1B2A5B;
  --brand-600:#24397A;
  --brand-500:#3556A8;
  --brand-100:#E7ECF8;
  --star-400:#E8B54B;
  --star-300:#F3D289;
  --leather-600:#8A5A3B;
  --leather-50:#F6EFE8;
  --ink-900:#0E1630;
  --text:#22303F;
  --muted:#5B667A;
  --bg:#F6F7FB;
  --bg-warm:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E4E8F2;
  --success:#2F8F6B;
  --warn:#C4553F;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --sh-sm:0 1px 2px rgba(14,22,48,.05);
  --sh-md:0 6px 18px rgba(14,22,48,.07);
  --sh-lg:0 18px 45px rgba(14,22,48,.10);
  --t:200ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:var(--star-300);color:var(--ink-900);}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:6px;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#EEF1F8;}
::-webkit-scrollbar-thumb{background:#C3CADC;border-radius:999px;border:2px solid #EEF1F8;}
::-webkit-scrollbar-thumb:hover{background:#9FA9C2;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:640px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ============ 顶部导航卡片 ============ */
.site-header{position:sticky;top:0;z-index:60;padding-top:14px;}
.nav-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--sh-md);
  padding:10px 20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  transition:box-shadow var(--t), background var(--t);
}
.nav-card.scrolled{box-shadow:var(--sh-lg);background:#FFFFFFF2;backdrop-filter:blur(6px);}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:34px;height:34px;border-radius:11px;
  background:linear-gradient(150deg,var(--brand-600),var(--brand-700));
  color:var(--star-300);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(27,42,91,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:15px;color:var(--ink-900);letter-spacing:.01em;}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-700);border-radius:2px;transition:var(--t);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-main{display:flex;align-items:center;gap:10px;margin-left:auto;flex-wrap:wrap;}
.nav-cats{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.nav-cat{
  display:inline-flex;align-items:center;gap:7px;
  height:46px;padding:0 14px;border-radius:12px;
  font-size:13.5px;color:var(--text);
  border:1px solid transparent;background:transparent;
  transition:var(--t);white-space:nowrap;
}
.nav-cat svg{color:var(--brand-500);transition:var(--t);}
.nav-cat:hover{border-color:var(--star-400);background:var(--bg-warm);}
.nav-cat:hover svg{color:var(--leather-600);}
.nav-cat.active{background:var(--brand-100);border-color:#CBD6EE;color:var(--brand-700);font-weight:600;}
.nav-cat.active svg{color:var(--brand-600);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:12px;font-size:14.5px;font-weight:600;
  cursor:pointer;border:1px solid transparent;transition:var(--t);white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(36,57,122,.24);}
.btn-primary:hover{background:var(--brand-700);box-shadow:0 10px 22px rgba(36,57,122,.28), inset 0 -1px 0 var(--star-400);}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:#C6D2EC;}
.btn-ghost:hover{background:var(--brand-100);border-color:var(--brand-500);}
.btn-line{padding:0;height:auto;background:none;color:var(--brand-600);font-weight:600;border:none;}
.btn-line:hover{color:var(--leather-600);}
.btn-star{background:var(--star-400);color:var(--ink-900);}
.btn-star:hover{background:var(--star-300);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;box-shadow:none;cursor:not-allowed;}

.nav-anchors{
  width:100%;display:flex;gap:8px;flex-wrap:wrap;
  padding-top:8px;margin-top:2px;border-top:1px solid var(--line);
}
.anchor-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--muted);
  padding:5px 13px;border-radius:999px;border:1px solid var(--line);background:#FBFCFE;
  transition:var(--t);
}
.anchor-pill:hover{color:var(--brand-600);border-color:var(--brand-500);background:#fff;}
.anchor-pill.active{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}

@media (max-width:1023px){
  .nav-toggle{display:flex;}
  .nav-main{
    display:none;width:100%;margin-left:0;padding-top:12px;border-top:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:12px;
  }
  .nav-main.open{display:flex;}
  .nav-cats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;}
  .nav-cat{height:auto;padding:11px 12px;border:1px solid var(--line);background:#FBFCFE;font-size:13px;border-radius:12px;}
  .nav-cat.active{background:var(--brand-100);}
  .nav-main .btn{width:100%;}
  .nav-anchors{border-top:1px dashed var(--line);}
}

/* ============ 通用板块 ============ */
.section{padding:56px 0;}
@media (min-width:640px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:100px 0;}}
.section-alt{background:var(--bg-warm);}
.section-dark{background:var(--ink-900);color:#E9EDF7;position:relative;overflow:hidden;}
.starfield::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.32;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 22%, #FFFFFF 45%, transparent 46%),
    radial-gradient(1.4px 1.4px at 34% 68%, #F3D289 45%, transparent 46%),
    radial-gradient(1.2px 1.2px at 58% 30%, #FFFFFF 45%, transparent 46%),
    radial-gradient(1.6px 1.6px at 79% 74%, #E8B54B 45%, transparent 46%),
    radial-gradient(1.2px 1.2px at 91% 18%, #FFFFFF 45%, transparent 46%),
    radial-gradient(1.3px 1.3px at 45% 88%, #FFFFFF 45%, transparent 46%);
  background-size:520px 380px;
}
.section-head{max-width:720px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--leather-600);background:var(--leather-50);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.eyebrow.on-dark{background:rgba(243,210,137,.14);color:var(--star-300);}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:700;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.25;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
.lead{font-size:16.5px;color:var(--muted);line-height:1.8;}
.muted{color:var(--muted);}
.small{font-size:13px;line-height:1.6;color:var(--muted);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;padding:4px 11px;border-radius:999px;
}
.badge-brand{background:var(--brand-100);color:var(--brand-700);}
.badge-leather{background:var(--leather-50);color:var(--leather-600);}
.badge-star{background:rgba(232,181,75,.18);color:#8A6415;}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#D3DBEC;}
.card:hover h3{color:var(--brand-600);}
.card-lg{border-radius:var(--r-lg);}

.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#B7C0D4;}

/* ============ 分类页头 ============ */
.cat-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F1F4FC 0%,var(--bg) 100%);padding:48px 0 40px;}
@media (min-width:1024px){.cat-hero{padding:64px 0 56px;}}
.cat-hero-grid{display:grid;gap:32px;align-items:center;}
@media (min-width:1024px){.cat-hero-grid{grid-template-columns:7fr 5fr;gap:48px;}}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-lg);aspect-ratio:16/11;background:var(--brand-700);}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(255,255,255,.95);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:12px 14px;box-shadow:var(--sh-md);backdrop-filter:blur(4px);
}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.stat-item{
  flex:1 1 150px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:14px 16px;box-shadow:var(--sh-sm);
}
.stat-item b{display:block;font-size:22px;color:var(--brand-700);line-height:1.2;}
.stat-item span{font-size:12.5px;color:var(--muted);}

/* ============ 步骤条 ============ */
.steps-track{display:grid;gap:16px;counter-reset:step;}
@media (min-width:768px){.steps-track{grid-template-columns:repeat(4,1fr);}}
.step-node{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 18px;position:relative;box-shadow:var(--sh-sm);transition:var(--t);
}
.step-node:hover{border-color:var(--star-400);transform:translateY(-2px);box-shadow:var(--sh-md);}
.step-num{
  width:36px;height:36px;border-radius:999px;
  background:var(--star-400);color:var(--ink-900);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;margin-bottom:12px;
  box-shadow:0 6px 14px rgba(232,181,75,.35);
}
.step-node h3{font-size:16.5px;margin-bottom:6px;}
.step-node p{font-size:14px;color:var(--muted);}
.steps-detail{margin-top:28px;display:grid;gap:18px;}
@media (min-width:768px){.steps-detail{grid-template-columns:repeat(2,1fr);}}
.detail-item{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand-500);
  border-radius:var(--r-sm);padding:18px 20px;box-shadow:var(--sh-sm);transition:var(--t);
}
.detail-item:hover{border-left-color:var(--star-400);box-shadow:var(--sh-md);}
.detail-item h4{font-size:15.5px;margin-bottom:6px;color:var(--ink-900);}
.detail-item p{font-size:14px;color:var(--muted);}

/* ============ 要点卡 ============ */
.grid-feature{display:grid;gap:20px;}
@media (min-width:1024px){.grid-feature{grid-template-columns:6fr 6fr;align-items:start;}}
.feature-main{padding:26px;}
.feature-side{display:grid;gap:20px;}
.feature-side .card{padding:22px;}
.check-list{display:grid;gap:10px;margin-top:14px;}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text);}
.check-list svg{flex-shrink:0;margin-top:5px;color:var(--success);}

/* ============ 表格 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;box-shadow:var(--sh-sm);}
table{width:100%;border-collapse:collapse;min-width:680px;}
thead th{
  text-align:left;font-size:13px;font-weight:600;color:var(--muted);
  padding:14px 18px;background:#F8FAFE;border-bottom:1px solid var(--line);white-space:nowrap;
}
tbody td{padding:16px 18px;font-size:14.5px;border-bottom:1px solid #EEF1F8;vertical-align:top;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:nth-child(even){background:#FCFDFF;}
tbody tr:hover{background:#F5F8FF;}
td .tag{font-size:13px;font-weight:600;color:var(--brand-700);}

/* ============ 场景卡 ============ */
.scene-grid{display:grid;gap:20px;}
@media (min-width:768px){.scene-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.scene-grid{grid-template-columns:repeat(3,1fr);}}
.scene-card{overflow:hidden;display:flex;flex-direction:column;}
.scene-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease;}
.scene-card:hover .thumb img{transform:scale(1.04);}
.scene-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.scene-card .body h3{font-size:17px;}
.scene-card .body p{font-size:14px;color:var(--muted);}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--brand-600);margin-top:auto;}
.arrow-link:hover{color:var(--leather-600);}
.arrow-link svg{transition:transform var(--t);}
.arrow-link:hover svg{transform:translateX(3px);}

/* ============ FAQ ============ */
.faq-grid{display:grid;gap:28px;}
@media (min-width:1024px){.faq-grid{grid-template-columns:4fr 8fr;gap:48px;align-items:start;}}
.faq-aside{position:sticky;top:120px;}
.faq-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh-sm);margin-top:20px;
}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:box-shadow var(--t),border-color var(--t);
}
.faq-item:hover{border-color:#D3DBEC;box-shadow:var(--sh-sm);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 54px 18px 20px;position:relative;
  font-size:16.5px;font-weight:600;color:var(--ink-900);transition:var(--t);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item summary::after{
  content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border-radius:999px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:600;color:var(--muted);transition:var(--t);
}
.faq-item[open] summary::after{content:"−";color:var(--star-400);border-color:var(--star-400);transform:translateY(-50%) rotate(180deg);}
.faq-item[open] summary{color:var(--brand-700);}
.faq-answer{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.8;animation:fadeIn 220ms ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ============ 互链 ============ */
.link-grid{display:grid;gap:16px;}
@media (min-width:640px){.link-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.link-grid{grid-template-columns:repeat(4,1fr);}}
.link-card{
  display:flex;flex-direction:column;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px;box-shadow:var(--sh-sm);transition:var(--t);
}
.link-card:hover{border-color:var(--star-400);transform:translateY(-2px);box-shadow:var(--sh-md);}
.link-card strong{font-size:15.5px;color:var(--ink-900);}
.link-card:hover strong{color:var(--brand-600);}
.link-card span{font-size:13px;color:var(--muted);}

/* ============ 底部 CTA ============ */
.cta-bar{
  position:relative;overflow:hidden;
  background:linear-gradient(140deg,var(--brand-700) 0%,var(--ink-900) 100%);
  border-radius:var(--r-lg);
  padding:36px 28px;
  display:grid;gap:24px;align-items:center;
  color:#E9EDF7;
}
@media (min-width:1024px){.cta-bar{grid-template-columns:7fr 5fr;padding:48px 44px;}}
.cta-bar h2{color:#fff;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (min-width:1024px){.cta-actions{justify-content:flex-end;}}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-outline-light:hover{background:#fff;color:var(--brand-700);}
.cta-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:18px;font-size:13px;color:#B9C3DC;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#A9B4CE;margin-top:56px;padding:56px 0 0;}
@media (min-width:1024px){.site-footer{margin-top:80px;padding-top:72px;}}
.footer-grid{display:grid;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:5fr 3fr 3fr 3fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand b{color:#fff;font-size:16px;}
.footer-text{font-size:13.5px;line-height:1.8;color:#93A0BE;max-width:340px;}
.footer-col h3{
  font-size:13px;color:#fff;margin-bottom:14px;font-weight:600;
  display:flex;align-items:center;gap:8px;
}
.footer-col h3 span{font-size:11px;color:#6C799A;letter-spacing:.1em;text-transform:uppercase;font-weight:400;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:13.5px;color:#A9B4CE;transition:var(--t);display:inline-block;}
.footer-links a:hover{color:var(--star-300);transform:translateX(2px);}
.social-row{display:flex;gap:10px;margin-top:18px;}
.social-row a{
  width:36px;height:36px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:center;color:#C9D3EA;transition:var(--t);
}
.social-row a:hover{background:rgba(243,210,137,.14);border-color:var(--star-400);color:var(--star-300);}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:#7B87A6;
}
.footer-bottom a{color:#9AA6C4;}
.footer-bottom a:hover{color:var(--star-300);}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:16px;bottom:16px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:50px;padding:0 20px;border-radius:999px;
  background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;
  box-shadow:var(--sh-lg);border:1px solid rgba(255,255,255,.16);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),background var(--t);
}
.float-cta.show{opacity:1;visibility:visible;transform:none;}
.float-cta:hover{background:var(--brand-700);}
@media (max-width:639px){body{padding-bottom:72px;}}

[id]{scroll-margin-top:150px;}

/* roulang page: category2 */
:root{
  --brand-700:#1B2A5B;
  --brand-600:#24397A;
  --brand-500:#3556A8;
  --star-400:#E8B54B;
  --star-300:#F3D289;
  --leather-600:#8A5A3B;
  --leather-50:#F6EFE8;
  --ink-900:#0E1630;
  --text:#22303F;
  --muted:#5B667A;
  --bg:#F6F7FB;
  --bg-warm:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E4E8F2;
  --ok:#2F8F6B;
  --warn:#C4553F;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(14,22,48,.05);
  --sh-md:0 6px 18px rgba(14,22,48,.07);
  --sh-lg:0 18px 45px rgba(14,22,48,.10);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:8px}
::selection{background:rgba(232,181,75,.32);color:var(--ink-900)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#CFD6E6;border-radius:999px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#B6C0D8}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1280px){.container{padding:0 32px}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:12px 0 6px}
.nav-card{
  position:relative;
  display:flex;align-items:center;gap:14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--sh-sm);
  padding:10px 14px;
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled .nav-card{box-shadow:var(--sh-md)}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  color:var(--star-300);
  background:linear-gradient(150deg,#1B2A5B 0%,#3556A8 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);
  flex:0 0 auto;
}
.logo-text{display:flex;flex-direction:column;line-height:1.16}
.logo-text b{font-size:15px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.logo-text span{font-size:10.5px;color:var(--muted);letter-spacing:.1em}
.nav-main{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-cats{display:flex;align-items:center;gap:4px}
.nav-cat{
  display:inline-flex;align-items:center;gap:7px;
  height:46px;padding:0 12px;border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:13.5px;color:var(--text);white-space:nowrap;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.nav-cat svg{color:var(--muted);transition:color .2s ease;flex:0 0 auto}
.nav-cat:hover{background:#FBF6EA;border-color:rgba(232,181,75,.55);color:var(--brand-700)}
.nav-cat:hover svg{color:var(--star-400)}
.nav-cat.active{background:#EFF3FC;border-color:rgba(53,86,168,.32);color:var(--brand-600);font-weight:600}
.nav-cat.active svg{color:var(--brand-500)}
.nav-actions{display:flex;align-items:center;gap:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;
  flex-direction:column;gap:4px;align-items:center;justify-content:center;
  cursor:pointer;margin-left:auto;transition:box-shadow .2s ease,border-color .2s ease;
}
.nav-toggle span{width:18px;height:2px;border-radius:2px;background:var(--brand-700);transition:transform .25s ease,opacity .25s ease}
.nav-toggle:hover{border-color:rgba(53,86,168,.35);box-shadow:var(--sh-sm)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:1023px){
  .nav-toggle{display:flex}
  .nav-main{display:none}
  .nav-main.is-open{
    display:flex;flex-direction:column;align-items:stretch;gap:12px;
    position:absolute;left:0;right:0;top:calc(100% + 8px);
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    box-shadow:var(--sh-lg);padding:14px;margin-left:0;
  }
  .nav-cats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .nav-cat{height:52px;width:100%;border:1px solid var(--line);background:#FCFCFE;justify-content:flex-start}
  .nav-actions .btn{width:100%}
}

/* ---------- 按钮 / 徽章 / 链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:44px;padding:0 18px;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(36,57,122,.22)}
.btn-primary:hover{background:var(--brand-700);box-shadow:0 8px 20px rgba(36,57,122,.28),inset 0 -1px 0 var(--star-400)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;border-color:rgba(53,86,168,.32);color:var(--brand-600)}
.btn-outline:hover{background:#EEF2FC;border-color:var(--brand-500)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--brand-700);border-color:#fff}
.btn-sm{height:40px;padding:0 14px;font-size:13.5px}
.btn[disabled],.btn.is-disabled{opacity:.55;box-shadow:none;pointer-events:none}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 11px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;
  background:#EFF3FC;color:var(--brand-600);
}
.badge-warm{background:var(--leather-50);color:var(--leather-600)}
.badge-star{background:#FDF3DC;color:#8A6420}
.badge-ok{background:#EAF6F0;color:var(--ok)}

.arrow-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-600);
  transition:color .2s ease,gap .2s ease;
}
.arrow-link span{transition:transform .2s ease}
.arrow-link:hover{color:var(--brand-700)}
.arrow-link:hover span{transform:translateX(3px)}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:22px 0 54px;
  background:linear-gradient(180deg,#FBF8F4 0%,#F6F7FB 100%);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(rgba(232,181,75,.55) 1px,transparent 1px),
    radial-gradient(rgba(53,86,168,.38) 1px,transparent 1px);
  background-size:130px 130px,190px 190px;
  background-position:0 0,64px 86px;
  opacity:.26;
}
.page-hero > .container{position:relative;z-index:1}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb li{display:flex;align-items:center;gap:6px}
.breadcrumb li + li::before{content:"›";color:#A9B2C6}
.breadcrumb a:hover{color:var(--brand-600)}

.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
.hero-copy h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.18;font-weight:700;letter-spacing:-.01em;
  color:var(--ink-900);margin:16px 0 16px;
}
.hero-copy .lede{font-size:16.5px;line-height:1.85;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.quick-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.quick-facts li{
  display:flex;align-items:baseline;gap:8px;
  padding:9px 15px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-sm);
  font-size:13px;color:var(--muted);
}
.quick-facts b{font-size:16.5px;font-weight:700;color:var(--brand-600);letter-spacing:-.01em}
.hero-figure{margin:0}
.hero-figure .media-frame img{aspect-ratio:16/11}

.media-frame{
  border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:#fff;box-shadow:var(--sh-lg);
}
.media-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}

@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-figure{order:2}
  .hero-figure .media-frame img{aspect-ratio:16/9;max-height:260px}
}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  display:flex;gap:8px;overflow-x:auto;padding:4px 0 6px;margin-top:6px;
  scrollbar-width:none;
}
.anchor-bar::-webkit-scrollbar{display:none}
.anchor-bar a{
  flex:0 0 auto;display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border-radius:var(--r-pill);background:#fff;border:1px solid var(--line);
  font-size:13.5px;color:var(--text);
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.anchor-bar a:hover{border-color:rgba(232,181,75,.7);color:var(--brand-700)}
.anchor-bar a.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}

/* ---------- 板块 ---------- */
.section{padding:64px 0}
@media (min-width:640px){.section{padding:78px 0}}
@media (min-width:1024px){.section{padding:100px 0}}
.section-warm{background:var(--bg-warm)}
.section-white{background:#fff}
.section-dark{position:relative;overflow:hidden;background:var(--ink-900);color:#E7ECF8}
[id]{scroll-margin-top:120px}

.section-head{max-width:740px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:var(--leather-50);color:var(--leather-600);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--star-400)}
.eyebrow.on-dark{background:rgba(255,255,255,.08);color:var(--star-300)}
h2{font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;margin:16px 0 14px}
.section-dark h2{color:#fff}
.section-head p{font-size:15.5px;color:var(--muted);line-height:1.85}
.section-dark .section-head p{color:#AEB9D2}
h3{font-size:19px;line-height:1.42;font-weight:600;color:var(--ink-900)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(53,86,168,.26)}
.card:hover h3{color:var(--brand-600)}
.card h3{transition:color .2s ease}

/* ---------- 图文两栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split.reverse .split-media{order:2}
@media (max-width:900px){
  .split{grid-template-columns:1fr;gap:28px}
  .split.reverse .split-media{order:0}
}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:var(--text);line-height:1.75;
}
.check-list li:last-child{border-bottom:0}
.check-list .tick{
  flex:0 0 auto;width:22px;height:22px;margin-top:4px;border-radius:50%;
  display:grid;place-items:center;background:#EAF6F0;color:var(--ok);
}

/* ---------- 错位卡片组 ---------- */
.mosaic{display:grid;grid-template-columns:1.45fr 1fr;gap:24px}
.mosaic-large{grid-row:span 2;display:flex;flex-direction:column;overflow:hidden}
.mosaic-media{position:relative}
.mosaic-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.mosaic-body{padding:28px 30px 30px;display:flex;flex-direction:column;gap:12px;flex:1}
.mosaic-body h3{font-size:22px}
.mosaic-body p{font-size:14.8px;color:var(--muted);line-height:1.85}
.mosaic-body .arrow-link{margin-top:auto;padding-top:10px}
.mosaic-small{padding:24px;display:flex;flex-direction:column;gap:10px}
.mosaic-small h3{font-size:17px}
.mosaic-small p{font-size:14.2px;color:var(--muted);line-height:1.8}
.mosaic-small .arrow-link{margin-top:auto;padding-top:8px}
.ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:#EFF3FC;color:var(--brand-500);
}
@media (max-width:900px){
  .mosaic{grid-template-columns:1fr}
  .mosaic-large{grid-row:auto}
}

/* ---------- 数据条 ---------- */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:56px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:28px 22px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:clamp(26px,3.2vw,36px);font-weight:700;color:var(--brand-600);line-height:1.12;letter-spacing:-.02em}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.6}
@media (max-width:767px){
  .stat-bar{grid-template-columns:1fr 1fr}
  .stat{padding:22px 16px}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
}

/* ---------- 双栏要点 ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media (max-width:900px){.two-col{grid-template-columns:1fr}}
.point-col{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:30px;box-shadow:var(--sh-sm);transition:box-shadow .2s ease,border-color .2s ease}
.point-col:hover{box-shadow:var(--sh-md);border-color:rgba(232,181,75,.5)}
.point-col h3{margin:14px 0 6px}
.point-col .sub{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.point-list li{
  display:flex;gap:11px;padding:12px 0;border-bottom:1px dashed var(--line);
  font-size:14.4px;line-height:1.78;color:var(--text);
}
.point-list li:last-child{border-bottom:0}
.dot{flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--star-400);margin-top:10px}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-sm);
}
table{width:100%;border-collapse:collapse;min-width:680px}
thead th{
  background:#F4F6FC;color:var(--brand-700);
  font-size:13.5px;font-weight:600;text-align:left;
  padding:15px 18px;white-space:nowrap;
}
tbody td{
  padding:17px 18px;font-size:14.4px;color:var(--text);
  line-height:1.75;border-top:1px solid var(--line);vertical-align:top;
}
tbody tr:nth-child(even){background:#FAFBFE}
tbody tr:hover{background:#F3F6FE}
tbody td:first-child{font-weight:600;color:var(--ink-900);white-space:nowrap}
.table-note{margin-top:14px;font-size:13.5px;color:var(--muted)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px 20px;box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(232,181,75,.6)}
.step:hover h3{color:var(--brand-600)}
.step-no{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:#FDF3DC;color:#8A6420;font-weight:700;font-size:14px;margin-bottom:16px;
}
.step h3{font-size:16.5px;margin-bottom:8px;transition:color .2s ease}
.step p{font-size:14px;color:var(--muted);line-height:1.78}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:46px;align-items:start}
@media (max-width:1023px){.faq-layout{grid-template-columns:1fr;gap:26px}}
.faq-aside{
  position:sticky;top:120px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-sm);
}
@media (max-width:1023px){.faq-aside{position:static}}
.faq-aside h3{font-size:18px;margin-bottom:10px}
.faq-aside p{font-size:14.2px;color:var(--muted);line-height:1.85;margin-bottom:18px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(53,86,168,.28)}
.faq-item.open{border-color:rgba(232,181,75,.6);box-shadow:var(--sh-md)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:18px 20px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);cursor:pointer;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-600)}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:grid;place-items:center;background:#F1F4FB;color:var(--brand-600);
  font-size:17px;line-height:1;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item.open .faq-icon{background:#FDF3DC;color:#8A6420;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 20px 20px;font-size:14.8px;color:var(--muted);line-height:1.88}

/* ---------- 相关入口 ---------- */
.link-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:1023px){.link-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.link-grid{grid-template-columns:1fr}}
.link-card{
  display:flex;flex-direction:column;gap:10px;padding:26px 24px;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:rgba(53,86,168,.3)}
.link-card svg{color:var(--brand-500)}
.link-card h3{font-size:16.5px;transition:color .2s ease}
.link-card:hover h3{color:var(--brand-600)}
.link-card p{font-size:13.8px;color:var(--muted);line-height:1.78}
.link-card .arrow-link{margin-top:auto;padding-top:8px}

/* ---------- 底部 CTA ---------- */
.cta-wrap{padding:0 0 76px}
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:#fff;
  border-radius:24px;padding:52px 48px;
  display:grid;grid-template-columns:1.45fr 1fr;gap:36px;align-items:center;
  box-shadow:var(--sh-lg);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(rgba(232,181,75,.7) 1px,transparent 1px),
    radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:120px 120px,200px 200px;
  background-position:0 0,70px 60px;
  opacity:.3;
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{margin:0 0 12px}
.cta-band p{color:#AEB9D2;font-size:15px;line-height:1.85;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.cta-meta{margin-top:18px;font-size:13.5px;color:#8C96B4}
@media (max-width:900px){
  .cta-band{grid-template-columns:1fr;padding:36px 24px;border-radius:20px}
  .cta-actions{justify-content:flex-start}
  .cta-wrap{padding-bottom:64px}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#B9C2D8;padding:66px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:38px;
  padding-bottom:46px;
}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);color:var(--star-300);box-shadow:none}
.footer-brand b{color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em}
.footer-text{font-size:14px;line-height:1.85;color:#98A3BD;max-width:360px}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.06);color:#B9C2D8;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.social-row a:hover{background:rgba(232,181,75,.18);color:var(--star-300);transform:translateY(-2px)}
.footer-col h3{
  display:flex;align-items:baseline;gap:8px;
  font-size:13.5px;font-weight:600;color:#fff;margin:0 0 16px;
}
.footer-col h3 span{font-size:11px;font-weight:500;letter-spacing:.1em;color:#7C87A6;text-transform:uppercase}
.footer-links li{margin-bottom:10px}
.footer-links a{display:inline-block;font-size:14px;color:#B9C2D8;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--star-300);transform:translateX(2px)}
.footer-contact li{font-size:14px;color:#98A3BD;line-height:1.9}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#7C87A6;
}
.footer-bottom a:hover{color:var(--star-300)}

/* roulang page: category4 */
/* ================= 设计变量 ================= */
:root{
  --brand-700:#1B2A5B; --brand-600:#24397A; --brand-500:#3556A8;
  --star-400:#E8B54B; --star-300:#F3D289;
  --leather-600:#8A5A3B; --leather-50:#F6EFE8;
  --ink-900:#0E1630; --text:#22303F; --muted:#5B667A;
  --bg:#F6F7FB; --bg-warm:#FBF8F4; --surface:#FFFFFF; --line:#E4E8F2;
  --ok:#2F8F6B; --warn:#C4553F;
  --r-sm:12px; --r-md:16px; --r-lg:20px;
  --sh-sm:0 1px 2px rgba(14,22,48,.05);
  --sh-md:0 6px 18px rgba(14,22,48,.07);
  --sh-lg:0 18px 45px rgba(14,22,48,.10);
  --ease:200ms ease;
  --container:1200px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ================= 基础 reset ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.8;
  color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
img{max-width:100%;display:block}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:4px}
::selection{background:rgba(232,181,75,.32);color:var(--ink-900)}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#EEF1F8}
::-webkit-scrollbar-thumb{background:#C6CEE2;border-radius:999px;border:2px solid #EEF1F8}
::-webkit-scrollbar-thumb:hover{background:var(--brand-500)}

/* ================= 容器与通用排版 ================= */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1280px){.container{padding:0 32px}}

.section{padding:56px 0;scroll-margin-top:120px}
@media(min-width:640px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section--warm{background:var(--bg-warm)}
.section--tight{padding-top:32px}
@media(min-width:1024px){.section--tight{padding-top:48px}}

.sec-head{max-width:760px;margin-bottom:36px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;color:var(--brand-600);
  background:#EDF1FC;border:1px solid #DCE4F8;border-radius:999px;
  padding:5px 14px;margin-bottom:14px;
}
.sec-head h2{font-size:clamp(24px,3vw,36px);line-height:1.25;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.8}

/* ================= 导航 ================= */
.site-header{position:sticky;top:0;z-index:60;padding-top:14px}
.nav-card{
  position:relative;display:flex;align-items:center;gap:18px;
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-md);padding:10px 20px;
  transition:box-shadow var(--ease),background var(--ease);
}
.nav-card.is-scrolled{box-shadow:var(--sh-lg)}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-500));
  color:var(--star-300);box-shadow:0 6px 14px rgba(36,57,122,.24);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text b{font-size:15.5px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}

.nav-main{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-cats{display:flex;align-items:center;gap:6px}
.nav-cat{
  display:flex;align-items:center;gap:6px;height:46px;padding:0 12px;
  border-radius:12px;font-size:14px;color:var(--text);
  border:1px solid transparent;transition:all var(--ease);white-space:nowrap;
}
.nav-cat svg{color:var(--muted);transition:color var(--ease)}
.nav-cat:hover{background:#F5F7FE;border-color:var(--star-300);color:var(--brand-600)}
.nav-cat:hover svg{color:var(--brand-500)}
.nav-cat.active{background:#EDF1FC;border-color:#D5DEF8;color:var(--brand-700);font-weight:600}
.nav-cat.active svg{color:var(--brand-600)}

.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:var(--ease)}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:12px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;transition:all var(--ease);white-space:nowrap;
}
.btn-primary{
  background:var(--brand-600);color:#fff;box-shadow:0 8px 18px rgba(36,57,122,.22);
}
.btn-primary:hover{background:var(--brand-700);box-shadow:0 10px 22px rgba(36,57,122,.28);border-bottom-color:var(--star-400)}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:#CBD6F2}
.btn-ghost:hover{background:#EEF2FD;border-color:var(--brand-500)}
.btn-dark-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-dark-ghost:hover{background:#fff;color:var(--brand-700);border-color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:13.5px}
.btn-lg{height:52px;padding:0 28px;font-size:15.5px}
.btn[disabled],.btn.is-disabled{opacity:.55;box-shadow:none;pointer-events:none}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand-600);transition:gap var(--ease),color var(--ease);
}
.link-arrow:hover{gap:10px;color:var(--brand-700)}

/* ================= 徽章 / 标签 ================= */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;
  padding:4px 12px;border-radius:999px;line-height:1.6;
}
.badge-brand{background:#EDF1FC;color:var(--brand-700);border:1px solid #D8E1F8}
.badge-star{background:#FDF5E4;color:#8A6412;border:1px solid #F5E2B6}
.badge-leather{background:var(--leather-50);color:var(--leather-600);border:1px solid #E8D9CB}
.badge-soft{background:#EEF1F6;color:var(--muted);border:1px solid var(--line)}

/* ================= 页头 ================= */
.page-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(246,247,251,.94),rgba(246,247,251,.99)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  padding:36px 0 52px;
}
@media(min-width:1024px){.page-hero{padding:48px 0 72px}}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"›";color:#A9B3C6}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb [aria-current]{color:var(--ink-900);font-weight:600}

.hero-grid{display:grid;gap:28px;margin-top:22px}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.35fr .9fr;gap:44px;align-items:center}}
.page-hero h1{
  font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:700;
  color:var(--ink-900);letter-spacing:-.01em;margin-top:16px;
}
.page-hero h1 em{font-style:normal;color:var(--brand-600)}
.hero-lead{margin-top:16px;font-size:16.5px;color:var(--muted);max-width:640px;line-height:1.85}
.hero-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px;
  border-top:1px solid var(--line);padding-top:22px;
}
.hero-metrics div b{display:block;font-size:clamp(20px,2.4vw,28px);font-weight:700;color:var(--brand-700);line-height:1.2}
.hero-metrics div span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
.hero-figure{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-lg);background:var(--surface);
}
.hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-figure figcaption{font-size:12.5px;color:var(--muted);padding:10px 16px;border-top:1px solid var(--line);background:var(--bg-warm)}

/* ================= 卡片 ================= */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#D7DFF3}
.card-pad{padding:24px}
.card h3{font-size:19px;font-weight:600;color:var(--ink-900);line-height:1.45}
.card h3:hover,.card:hover h3{color:var(--brand-600)}
.card p{color:var(--muted);font-size:14.5px;line-height:1.8;margin-top:10px}

/* 图文两栏 */
.split{display:grid;gap:32px;align-items:center}
@media(min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:56px}}
.split-figure{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);background:var(--surface)}
.split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-text h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--ink-900);line-height:1.3}
.split-text p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.85}
.check-list{margin-top:20px;display:grid;gap:12px}
.check-list li{display:flex;gap:10px;font-size:15px;color:var(--text)}
.check-list svg{flex-shrink:0;margin-top:6px;color:var(--ok)}

/* 统计条目 */
.stat-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;margin-top:8px;
}
@media(min-width:768px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat-strip div{background:var(--surface);padding:22px 20px}
.stat-strip b{display:block;font-size:clamp(22px,2.6vw,30px);color:var(--brand-700);font-weight:700;line-height:1.2}
.stat-strip span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted)}

/* ================= 表格 ================= */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);box-shadow:var(--sh-sm);-webkit-overflow-scrolling:touch;
}
table.compare{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px}
table.compare caption{
  text-align:left;padding:16px 20px;font-size:13.5px;color:var(--muted);
  border-bottom:1px solid var(--line);background:var(--bg-warm);
}
table.compare th,table.compare td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.75}
table.compare thead th{
  font-size:13.5px;font-weight:600;color:var(--brand-700);background:#F3F6FD;
  white-space:nowrap;border-bottom:1px solid #DCE4F8;
}
table.compare tbody tr:nth-child(even){background:#FAFBFE}
table.compare tbody tr:hover{background:#F4F7FE}
table.compare tbody tr:last-child td{border-bottom:none}
table.compare td:first-child{font-weight:600;color:var(--ink-900);white-space:nowrap}
.cell-note{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--brand-600);background:#EDF1FC;border-radius:999px;padding:2px 10px}
.cell-warn{color:var(--warn);font-weight:600}
.cell-ok{color:var(--ok);font-weight:600}

/* ================= 要点卡阶梯网格 ================= */
.stagger{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:768px){
  .stagger{grid-template-columns:1fr 1fr}
}
@media(min-width:1024px){
  .stagger{grid-template-columns:1fr 1fr;gap:24px}
  .stagger .card:nth-child(2){transform:translateY(18px)}
  .stagger .card:nth-child(3){transform:translateY(-8px)}
}
@media(min-width:1024px){
  .stagger .card:hover{transform:translateY(-2px)}
  .stagger .card:nth-child(2):hover{transform:translateY(14px)}
  .stagger .card:nth-child(3):hover{transform:translateY(-12px)}
}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:#EDF1FC;color:var(--brand-600);margin-bottom:14px;border:1px solid #DCE4F8;
}

/* ================= FAQ ================= */
.faq-wrap{display:grid;gap:32px}
@media(min-width:1024px){.faq-wrap{grid-template-columns:1fr 1.6fr;gap:56px;align-items:start}}
.faq-side{position:sticky;top:120px}
.faq-side .card-pad{border-left:4px solid var(--star-400)}
.faq-list{display:grid;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:#CBD6F2;box-shadow:var(--sh-md)}
.faq-q{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink-900);cursor:pointer;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"+";flex-shrink:0;width:26px;height:26px;border-radius:999px;
  display:grid;place-items:center;font-size:17px;font-weight:500;
  color:var(--brand-600);background:#EDF1FC;border:1px solid #D8E1F8;
  transition:transform var(--ease),background var(--ease),color var(--ease);
}
.faq-item[open] .faq-q::after{content:"−";background:var(--star-400);border-color:var(--star-400);color:#fff;transform:rotate(180deg)}
.faq-a{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.85;max-width:60ch}
.faq-item[open] .faq-a{animation:fadeIn 220ms ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ================= 互链卡组 ================= */
.cross-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:640px){.cross-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.cross-grid{grid-template-columns:repeat(4,1fr)}}
.cross-card{display:flex;flex-direction:column;gap:12px;padding:22px}
.cross-card .idx{font-size:12.5px;font-weight:700;color:var(--star-400);letter-spacing:.08em}
.cross-card h3{font-size:17px}
.cross-card .link-arrow{margin-top:auto}

/* ================= 底部 CTA ================= */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(circle at 12% 22%, rgba(255,255,255,.55) 0 1px, transparent 1.6px),
    radial-gradient(circle at 68% 72%, rgba(243,210,137,.6) 0 1px, transparent 1.6px),
    radial-gradient(circle at 88% 18%, rgba(255,255,255,.4) 0 1px, transparent 1.6px),
    linear-gradient(135deg,var(--brand-700),var(--brand-600) 55%,#182449);
  background-size:220px 220px,300px 300px,260px 260px,auto;
  border-radius:var(--r-lg);
  padding:40px 28px;
  box-shadow:var(--sh-lg);
  scroll-margin-top:120px;
}
@media(min-width:1024px){.cta-band{padding:56px 52px}}
.cta-inner{display:grid;gap:26px}
@media(min-width:1024px){.cta-inner{grid-template-columns:1.4fr 1fr;align-items:center}}
.cta-inner h2{font-size:clamp(22px,2.8vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
.cta-inner p{margin-top:12px;color:rgba(255,255,255,.78);font-size:15px;line-height:1.8;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-meta{
  margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:8px 26px;font-size:13px;color:rgba(255,255,255,.72);
}

/* ================= 浮动 CTA ================= */
.float-cta{
  position:fixed;right:16px;bottom:16px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 20px;border-radius:999px;
  background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 14px 30px rgba(14,22,48,.24);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--brand-700)}

/* ================= 页脚 ================= */
.site-footer{
  margin-top:64px;background:var(--ink-900);color:rgba(255,255,255,.74);
  padding:56px 0 24px;font-size:14px;
}
@media(min-width:1024px){.site-footer{padding:72px 0 28px}}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700}
.footer-brand .logo-mark{background:linear-gradient(140deg,var(--brand-500),#101A38);color:var(--star-300)}
.footer-text{margin-top:16px;line-height:1.85;color:rgba(255,255,255,.62);max-width:42ch}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.74);transition:all var(--ease);
}
.social-row a:hover{border-color:var(--star-400);color:var(--star-400);transform:translateY(-2px)}
.footer-col h3{
  font-size:13px;font-weight:600;color:#fff;letter-spacing:.06em;
  padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:16px;
}
.footer-col h3 span{font-size:11px;color:rgba(255,255,255,.42);letter-spacing:.1em;text-transform:uppercase;margin-left:6px}
.footer-links{display:grid;gap:10px}
.footer-links a,.footer-links span{display:inline-block;color:rgba(255,255,255,.66);font-size:14px;transition:all var(--ease)}
.footer-links a:hover{color:var(--star-400);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.48);
}

/* ================= 移动端导航 ================= */
@media(max-width:1023px){
  .nav-toggle{display:flex;margin-left:auto}
  .nav-main{
    display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
    background:var(--surface);border:1px solid var(--line);border-radius:16px;
    box-shadow:var(--sh-lg);padding:16px;z-index:80;
    flex-direction:column;align-items:stretch;gap:14px;
  }
  .nav-main.open{display:flex}
  .nav-cats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .nav-cat{height:auto;padding:12px;border:1px solid var(--line);font-size:13.5px;align-items:flex-start;flex-direction:column;gap:8px}
  .nav-cat.active{border-color:#CBD6F2}
  .nav-main .btn{width:100%}
}

@media(max-width:639px){
  .hero-metrics{overflow-x:auto;grid-template-columns:repeat(3,minmax(140px,1fr))}
  .page-hero{padding-bottom:40px}
  .cta-band{padding:32px 20px;border-radius:16px}
  .footer-bottom{flex-direction:column;gap:6px}
  body{padding-bottom:72px}
}

/* roulang page: category5 */
:root{
  --brand-700:#1B2A5B; --brand-600:#24397A; --brand-500:#3556A8;
  --star-400:#E8B54B; --star-300:#F3D289;
  --leather-600:#8A5A3B; --leather-50:#F6EFE8;
  --ink-900:#0E1630; --text:#22303F; --muted:#5B667A;
  --bg:#F6F7FB; --bg-warm:#FBF8F4; --surface:#FFFFFF; --line:#E4E8F2;
  --ok:#2F8F6B; --warn:#C4553F;
  --r-sm:12px; --r-md:16px; --r-lg:20px;
  --sh-sm:0 1px 2px rgba(14,22,48,.05);
  --sh-md:0 6px 18px rgba(14,22,48,.07);
  --sh-lg:0 18px 45px rgba(14,22,48,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--star-400);outline-offset:2px;border-radius:8px}
::selection{background:rgba(232,181,75,.35);color:var(--ink-900)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#EDF0F7}
::-webkit-scrollbar-thumb{background:#C6CEE0;border-radius:999px;border:2px solid #EDF0F7}
::-webkit-scrollbar-thumb:hover{background:#A9B4CC}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media(min-width:640px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:70;padding:12px 0 0}
.nav-card{
  position:relative;background:rgba(255,255,255,.98);border:1px solid var(--line);
  border-radius:18px;box-shadow:var(--sh-sm);padding:8px 20px 0;
  transition:box-shadow .25s ease,background .25s ease;
}
.nav-card.scrolled{box-shadow:var(--sh-md);backdrop-filter:blur(8px);background:rgba(255,255,255,.94)}
.nav-row{display:flex;align-items:center;gap:16px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  box-shadow:inset 0 0 0 1px rgba(232,181,75,.4);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:16px;letter-spacing:-.01em;color:var(--ink-900)}
.logo-text span{font-size:10.5px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.nav-main{display:flex;align-items:center;gap:12px;flex:1;justify-content:flex-end}
.nav-cats{display:flex;align-items:center;gap:6px}
.nav-cat{
  display:inline-flex;align-items:center;gap:6px;height:46px;padding:0 12px;border-radius:12px;
  font-size:14px;color:var(--muted);border:1px solid transparent;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.nav-cat svg{color:#93A0B8;transition:color .2s ease,transform .2s ease}
.nav-cat:hover{background:#FDF9EF;border-color:var(--star-400);color:var(--brand-700)}
.nav-cat:hover svg{color:var(--star-400);transform:translateY(-1px)}
.nav-cat.active{background:#EEF2FC;border-color:#C9D6F2;color:var(--brand-700);font-weight:600}
.nav-cat.active svg{color:var(--brand-600)}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;height:44px;padding:0 18px;border-radius:12px;
  background:var(--brand-700);color:#fff;font-size:14px;font-weight:600;
  border:1px solid transparent;border-bottom-color:rgba(232,181,75,.55);
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease;white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-600);box-shadow:0 10px 22px rgba(27,42,91,.22);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;margin-left:auto;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-700);transition:transform .25s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.subnav{display:flex;align-items:center;gap:8px;padding:8px 0 12px;border-top:1px dashed var(--line);margin-top:8px;overflow-x:auto;scrollbar-width:none}
.subnav::-webkit-scrollbar{display:none}
.subnav a{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  font-size:13.5px;color:var(--muted);background:#F4F6FC;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;white-space:nowrap;
}
.subnav a:hover{color:var(--brand-700);border-color:var(--star-400);background:#FDF9EF}
.subnav a.active{background:var(--brand-700);color:#fff;box-shadow:0 6px 14px rgba(27,42,91,.2)}

@media(max-width:1023px){
  .nav-toggle{display:flex}
  .nav-main{
    position:absolute;left:0;right:0;top:calc(100% + 10px);flex-direction:column;align-items:stretch;gap:12px;
    background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-lg);padding:14px;
    display:none;
  }
  .nav-main.open{display:flex}
  .nav-cats{display:grid;grid-template-columns:1fr 1fr;gap:8px;width:100%}
  .nav-cat{height:52px;justify-content:flex-start;font-size:13.5px;padding:0 10px}
  .nav-cta{width:100%;justify-content:center;height:48px}
  .logo-text b{font-size:15px}
}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(150deg,#101A3C 0%,#1B2A5B 52%,#24397A 100%);color:#fff;padding:44px 0 72px;margin-top:-106px;padding-top:150px}
.page-hero-dots{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1.4px),radial-gradient(rgba(243,210,137,.55) 1px,transparent 1.4px);
  background-size:150px 150px,230px 230px;background-position:0 0,70px 95px;opacity:.26;
}
.page-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr 1fr;gap:52px;align-items:center}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.82);border-bottom:1px solid rgba(255,255,255,.24);padding-bottom:1px}
.breadcrumb a:hover{color:var(--star-300);border-color:var(--star-300)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"›";color:rgba(255,255,255,.4)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.06em;color:var(--star-300);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--star-400);display:block}
.page-hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.15;font-weight:700;letter-spacing:-.01em;margin-bottom:16px}
.page-hero-lead{font-size:16.5px;line-height:1.85;color:rgba(255,255,255,.8);max-width:560px}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero-stats li{
  display:flex;align-items:baseline;gap:8px;padding:10px 16px;border-radius:12px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);font-size:13px;color:rgba(255,255,255,.78);
}
.hero-stats b{font-size:19px;color:var(--star-300);font-weight:700;line-height:1}
.page-hero-figure{margin:0}
.page-hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-lg);border:1px solid rgba(255,255,255,.16)}
.page-hero-figure figcaption{margin-top:10px;font-size:12.5px;color:rgba(255,255,255,.55)}
@media(max-width:1023px){
  .page-hero{padding:132px 0 56px;margin-top:-116px}
  .page-hero-inner{grid-template-columns:1fr;gap:32px}
  .page-hero-figure img{aspect-ratio:16/10}
}
@media(max-width:639px){
  .page-hero{padding:126px 0 48px}
  .hero-stats{gap:8px}
  .hero-stats li{padding:8px 12px;font-size:12.5px}
}

/* ---------- generic section ---------- */
.section{padding:56px 0}
@media(min-width:640px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:100px 0}}
.section-warm{background:var(--bg-warm)}
.section-white{background:var(--surface)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;color:var(--ink-900)}
.section-head p{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}
.section-head .head-link{font-size:14px;color:var(--brand-600);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.section-head .head-link:hover{color:var(--star-400)}
.anchor{scroll-margin-top:170px}

/* ---------- overview split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.split-figure{margin:0;position:relative}
.split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-md)}
.split-figure figcaption{margin-top:12px;font-size:12.5px;color:var(--muted);text-align:center}
.split-copy h2{font-size:clamp(23px,2.7vw,32px);line-height:1.28;font-weight:700;color:var(--ink-900);margin-bottom:16px}
.split-copy p{color:var(--text);font-size:16px;margin-bottom:16px;line-height:1.85}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text)}
.check-list svg{flex:0 0 auto;margin-top:5px;color:var(--ok)}
@media(max-width:1023px){.split{grid-template-columns:1fr;gap:32px}}

/* ---------- waterfall cards ---------- */
.falls{column-count:3;column-gap:24px}
.fall-card{
  break-inside:avoid;-webkit-column-break-inside:avoid;margin:0 0 24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 22px 20px;box-shadow:var(--sh-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fall-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#CBD6EF}
.fall-card:hover h3{color:var(--brand-600)}
.fall-card .badge{margin-bottom:12px}
.fall-card h3{font-size:17.5px;line-height:1.45;font-weight:600;color:var(--ink-900);margin-bottom:8px;transition:color .2s ease}
.fall-card p{font-size:14.5px;color:var(--muted);line-height:1.8}
.fall-card .arrow{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--brand-600);font-weight:600}
.fall-card .arrow:hover{color:var(--star-400)}
.fall-card.tint-star{background:#FFFCF4;border-color:#F1E2C0}
.fall-card.tint-leather{background:var(--leather-50);border-color:#EBD9CA}
@media(max-width:1023px){.falls{column-count:2}}
@media(max-width:639px){.falls{column-count:1;column-gap:0}}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.6}
.badge-brand{background:#EEF2FC;color:var(--brand-700)}
.badge-star{background:#FDF3DC;color:#8A6212}
.badge-leather{background:#F3E5DA;color:var(--leather-600)}
.badge-ok{background:#E7F5EF;color:var(--ok)}

/* ---------- tag cloud ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.tag-cloud a{
  display:inline-flex;align-items:center;padding:9px 18px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--muted);font-size:14px;
  transition:all .2s ease;box-shadow:var(--sh-sm);
}
.tag-cloud a:hover{border-color:var(--star-400);color:var(--brand-700);background:#FDF9EF;transform:translateY(-2px)}
.tag-cloud a.t-lg{font-size:16px;font-weight:600;color:var(--brand-700);padding:11px 22px}
.tag-cloud a.t-sm{font-size:13px;padding:7px 15px}
.tag-note{margin-top:20px;font-size:13.5px;color:var(--muted)}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:.85fr 1.6fr;gap:52px;align-items:start}
.faq-aside{position:sticky;top:170px}
.faq-aside h2{font-size:clamp(23px,2.7vw,32px);line-height:1.28;font-weight:700;color:var(--ink-900);margin-bottom:14px}
.faq-aside p{font-size:15px;color:var(--muted);margin-bottom:22px}
.help-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-sm)}
.help-card b{display:block;font-size:15.5px;color:var(--ink-900);margin-bottom:6px}
.help-card span{display:block;font-size:13.5px;color:var(--muted);margin-bottom:16px}
.faq-list{display:grid;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item[open]{border-color:#CBD6EF;box-shadow:var(--sh-md)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16.5px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:999px;display:grid;place-items:center;
  background:#F2F5FC;color:var(--brand-600);font-size:17px;line-height:1;font-weight:600;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:#FDF3DC;color:var(--star-400)}
.faq-body{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.85}
@media(max-width:1023px){.faq-grid{grid-template-columns:1fr;gap:32px}.faq-aside{position:static}}

/* ---------- related cards ---------- */
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.related-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:#CBD6EF}
.related-card:hover h3{color:var(--brand-600)}
.related-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.related-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.related-body h3{font-size:16px;font-weight:600;color:var(--ink-900);transition:color .2s ease}
.related-body p{font-size:13.5px;color:var(--muted);flex:1}
.related-body .arrow{font-size:13.5px;color:var(--brand-600);font-weight:600}
@media(max-width:1023px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:639px){.related-grid{grid-template-columns:1fr}}

/* ---------- cta ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(140deg,#0E1630 0%,#1B2A5B 60%,#24397A 100%);color:#fff;padding:72px 0;border-radius:0}
.cta-dots{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1.4px),radial-gradient(rgba(243,210,137,.5) 1px,transparent 1.4px);
  background-size:160px 160px,240px 240px;background-position:0 0,80px 60px;opacity:.24;
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
.cta-copy h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:700;margin-bottom:12px}
.cta-copy p{font-size:15.5px;color:rgba(255,255,255,.78);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-meta{position:relative;z-index:1;margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16);display:flex;flex-wrap:wrap;gap:12px 32px;font-size:13.5px;color:rgba(255,255,255,.68)}
@media(min-width:1024px){.cta-band{padding:88px 0}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border-radius:12px;font-size:15px;font-weight:600;border:1px solid transparent;transition:all .2s ease;white-space:nowrap}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:var(--sh-sm);border-bottom-color:rgba(232,181,75,.6)}
.btn-primary:hover{background:var(--brand-600);box-shadow:0 12px 26px rgba(27,42,91,.24);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:#C9D6F2;color:var(--brand-700)}
.btn-ghost:hover{background:#EEF2FC;border-color:var(--brand-500)}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-dark-ghost:hover{background:#fff;color:var(--brand-700);border-color:#fff}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.55;box-shadow:none;transform:none;pointer-events:none}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* ---------- footer ---------- */
.site-footer{background:#0E1630;color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;color:#fff}
.footer-brand .logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(140deg,#24397A,#1B2A5B)}
.footer-brand b{font-size:16px;letter-spacing:-.01em}
.footer-text{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.78);
  transition:all .2s ease;
}
.social-row a:hover{background:rgba(232,181,75,.16);border-color:var(--star-400);color:var(--star-300);transform:translateY(-2px)}
.footer-col h3{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.5);font-weight:600;margin-bottom:16px}
.footer-col h3 span{display:block;font-size:13px;letter-spacing:0;text-transform:none;color:#fff;font-weight:600;margin-top:4px;opacity:.85}
.footer-links{display:grid;gap:11px}
.footer-links li{font-size:14px;color:rgba(255,255,255,.62)}
.footer-links a{display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--star-300);transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}
@media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:639px){.footer-grid{grid-template-columns:1fr}.site-footer{padding:48px 0 24px}.footer-bottom{margin-top:36px}}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:16px;bottom:16px;z-index:80;display:inline-flex;align-items:center;gap:8px;
  height:50px;padding:0 20px;border-radius:999px;background:var(--brand-700);color:#fff;font-size:14.5px;font-weight:600;
  box-shadow:0 14px 32px rgba(14,22,48,.28);border:1px solid rgba(232,181,75,.45);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,background .2s ease;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--brand-600)}
@media(max-width:639px){.float-cta{height:46px;padding:0 16px;font-size:13.5px}.site-footer{padding-bottom:88px}}