/* roulang page: index */
:root{
    --primary:#3552D9; --primary-deep:#2139A8; --primary-tint:#E8EDFF; --primary-pale:#F4F6FF;
    --accent:#FF8A3D; --accent-tint:#FFF1E6;
    --mint:#17B3A3;
    --ink:#101828; --body:#5A6478; --muted:#8A93A6;
    --line:#E4E9F2; --bg:#F6F8FC; --card:#FFFFFF; --footer:#0E1729;
    --radius-card:14px; --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 6px rgba(16,24,40,.06), 0 22px 42px -16px rgba(33,64,154,.28);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;background:var(--bg);color:var(--body);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;line-height:1.8;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer}
  h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.32;letter-spacing:.01em}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  .tnum{font-variant-numeric:tabular-nums}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);font-weight:600;font-size:15px;
    padding:12px 22px;min-height:44px;border:1px solid transparent;
    transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 22px -12px rgba(53,82,217,.85)}
  .btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px)}
  .btn-primary:active{transform:translateY(0);box-shadow:none}
  .btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
  .btn-ghost:hover{background:var(--primary-tint);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-soft{background:var(--accent);color:#fff;box-shadow:0 12px 22px -12px rgba(255,138,61,.9)}
  .btn-soft:hover{background:#F0742A;transform:translateY(-2px)}
  .btn-sm{padding:8px 16px;min-height:38px;font-size:13.5px;border-radius:9px}
  .btn.is-disabled,.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none!important;box-shadow:none!important}
  .btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14px}
  .btn-link:hover{text-decoration:underline;text-underline-offset:4px}

  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease}
  .card-hover:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}

  .badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;line-height:1.6;padding:4px 11px;border-radius:999px;background:var(--primary-tint);color:var(--primary)}
  .badge-accent{background:var(--accent-tint);color:#C15A16}
  .badge-mint{background:rgba(23,179,163,.13);color:#0E8E82}
  .badge-gray{background:#F1F3F8;color:var(--muted)}

  .nav-link{position:relative;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;font-size:14.5px;color:var(--body);transition:background .15s ease,color .15s ease}
  .nav-link:hover{background:var(--primary-pale);color:var(--primary)}
  .nav-link.active{background:var(--primary-tint);color:var(--primary);font-weight:700}
  .nav-link.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--primary)}
  .nav-sub{padding-left:26px;font-size:14px}
  .nav-sub::after{content:"";position:absolute;left:14px;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--line)}
  .nav-sub:hover::after,.nav-sub.active::after{background:var(--primary)}

  .snap-row{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px}
  .snap-row>*{scroll-snap-align:start;flex:0 0 auto}
  .snap-row::-webkit-scrollbar{height:6px}
  .snap-row::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
  .snap-row::-webkit-scrollbar-track{background:transparent}

  .ring{width:158px;height:158px;border-radius:50%;background:conic-gradient(var(--primary) 0 68%, var(--primary-tint) 68% 100%);display:grid;place-items:center;flex:0 0 auto}
  .ring-inner{width:124px;height:124px;border-radius:50%;background:#fff;display:grid;place-items:center}

  .faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
  .faq-item+.faq-item{margin-top:12px}
  .faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;font-weight:600;color:var(--ink);font-size:15.5px}
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item[open]{border-left:3px solid var(--primary)}
  .faq-arrow{transition:transform .2s ease;color:var(--muted);flex:0 0 auto}
  .faq-item[open] .faq-arrow{transform:rotate(180deg);color:var(--primary)}
  .faq-body{padding:0 18px 18px;font-size:14.5px;color:var(--body)}

  .step-num{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:12px;background:var(--primary-tint);color:var(--primary);font-weight:800;font-size:17px}
  .dot-list li{position:relative;padding-left:18px;margin-top:8px;font-size:14.5px;color:var(--body)}
  .dot-list li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--primary)}

  .drawer{position:fixed;top:0;right:0;bottom:0;width:302px;max-width:88vw;background:#fff;z-index:60;transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column}
  .drawer.open{transform:translateX(0)}
  .drawer-mask{position:fixed;inset:0;background:rgba(16,24,40,.45);z-index:55}

  a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:8px}

  @media (max-width:640px){
    .btn{font-size:14.5px;padding:11px 18px}
  }

/* roulang page: article */
:root{
    --primary:#3552D9;
    --primary-dark:#2139A8;
    --primary-light:#E8EDFF;
    --primary-ghost:#F4F6FF;
    --accent:#FF8A3D;
    --mint:#17B3A3;
    --ink:#101828;
    --text:#3A4256;
    --muted:#5A6478;
    --faint:#8A93A6;
    --line:#E4E9F2;
    --bg:#F6F8FC;
    --card:#FFFFFF;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 6px rgba(16,24,40,.06), 0 18px 38px -14px rgba(33,64,154,.30);
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

  /* 侧边导航链接 */
  .nav-link{
    position:relative;
    display:flex;
    align-items:center;
    gap:10px;
    padding:9px 12px;
    margin-bottom:2px;
    border-radius:10px;
    font-size:14px;
    color:var(--muted);
    transition:background .18s ease, color .18s ease;
  }
  .nav-link:hover{background:rgba(232,237,255,.7);color:var(--primary-dark)}
  .nav-link.active{background:var(--primary-light);color:var(--primary-dark);font-weight:700}
  .nav-link.active::before{
    content:"";
    position:absolute;left:0;top:8px;bottom:8px;width:3px;
    border-radius:0 3px 3px 0;background:var(--primary);
  }

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--radius-btn);
    font-size:14.5px;font-weight:600;border:1px solid transparent;
    transition:background .18s ease, color .18s ease, box-shadow .18s ease, transform .12s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px -12px rgba(53,82,217,.75)}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 16px 28px -14px rgba(33,57,168,.8)}
  .btn-primary:active{transform:translateY(0)}
  .btn-secondary{background:#fff;color:var(--primary-dark);border-color:rgba(53,82,217,.45)}
  .btn-secondary:hover{background:var(--primary-light);transform:translateY(-2px)}
  .btn-ghost{background:transparent;color:var(--primary-dark);padding:0 6px;height:auto}
  .btn-ghost:hover{text-decoration:underline;text-underline-offset:4px}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:3px 10px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.01em;
    background:var(--primary-light);color:var(--primary-dark);
  }
  .badge-accent{background:#FFF1E6;color:#B85614}
  .badge-mint{background:rgba(23,179,163,.12);color:#0F7A6F}

  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    transition:box-shadow .2s ease, transform .2s ease;
  }
  .card-hover:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}

  /* 正文排版 */
  .article-body{font-size:16.5px;line-height:1.85;color:var(--text)}
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.2em}
  .article-body h2{
    font-size:22px;font-weight:700;color:var(--ink);
    margin:2.1em 0 .75em;line-height:1.5;
  }
  .article-body h3{font-size:18.5px;font-weight:600;color:var(--ink);margin:1.7em 0 .6em;line-height:1.55}
  .article-body h4{font-size:16.5px;font-weight:600;color:var(--ink);margin:1.4em 0 .5em}
  .article-body strong{color:var(--ink);font-weight:600}
  .article-body a{
    color:var(--primary-dark);
    text-decoration:underline;
    text-underline-offset:3px;
    text-decoration-thickness:1px;
  }
  .article-body a:hover{color:var(--primary)}
  .article-body ul{list-style:none;padding:0;margin:0 0 1.25em}
  .article-body ul > li{position:relative;padding-left:22px;margin-bottom:.55em}
  .article-body ul > li::before{
    content:"";position:absolute;left:6px;top:.78em;
    width:6px;height:6px;border-radius:50%;background:var(--primary);
  }
  .article-body ol{list-style:none;padding:0;margin:0 0 1.25em;counter-reset:ab-item}
  .article-body ol > li{position:relative;padding-left:32px;margin-bottom:.6em;counter-increment:ab-item}
  .article-body ol > li::before{
    content:counter(ab-item);
    position:absolute;left:0;top:.28em;
    width:21px;height:21px;border-radius:7px;
    background:var(--primary-light);color:var(--primary-dark);
    font-size:12px;font-weight:700;line-height:21px;text-align:center;
  }
  .article-body blockquote{
    margin:1.5em 0;padding:14px 20px;
    border-left:3px solid var(--primary);
    background:var(--primary-ghost);
    border-radius:0 12px 12px 0;color:var(--text);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:12px;margin:1.5em auto;height:auto}
  .article-body figure{margin:1.5em 0}
  .article-body figcaption{
    margin-top:8px;font-size:13.5px;color:var(--faint);text-align:center;
  }
  .article-body table{
    width:100%;border-collapse:collapse;margin:1.5em 0;
    font-size:14.5px;background:#fff;border-radius:10px;overflow:hidden;
  }
  .article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left}
  .article-body th{background:var(--primary-ghost);color:var(--ink);font-weight:600}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
  .article-body code{
    background:var(--primary-ghost);color:var(--primary-dark);
    padding:2px 6px;border-radius:6px;font-size:14px;
  }

  .divider{height:1px;background:var(--line);border:0}

  @media (max-width:767px){
    .article-body{font-size:16px}
    .article-body h2{font-size:20px}
    .article-body h3{font-size:17px}
  }

/* roulang page: category1 */
:root{
    --primary:#3552D9;
    --primary-deep:#2139A8;
    --primary-tint:#E8EDFF;
    --primary-faint:#F4F6FF;
    --accent:#FF8A3D;
    --accent-tint:#FFF1E6;
    --mint:#17B3A3;
    --ink:#101828;
    --ink-soft:#5A6478;
    --ink-faint:#8A93A6;
    --line:#E4E9F2;
    --bg:#F6F8FC;
    --card:#FFFFFF;
    --footer:#0E1729;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 4px rgba(16,24,40,.06), 0 20px 36px -14px rgba(33,64,154,.3);
  }
  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0;
    font-family:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size:16px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  h1,h2,h3,h4,p,dl,dd,dt{ margin:0; }
  :focus-visible{
    outline:2px solid var(--primary);
    outline-offset:2px;
    border-radius:6px;
  }
  .tabular{ font-variant-numeric:tabular-nums; }

  /* 侧栏 */
  .sidebar{
    position:fixed;
    top:0;
    right:0;
    height:100%;
    width:288px;
    display:flex;
    flex-direction:column;
    background:#fff;
    border-left:1px solid var(--line);
    box-shadow:-16px 0 40px -24px rgba(16,24,40,.35);
    transform:translateX(100%);
    transition:transform .28s ease;
    z-index:50;
  }
  .sidebar.open{ transform:translateX(0); }
  @media (min-width:1024px){
    .sidebar{
      position:sticky;
      top:0;
      left:0;
      right:auto;
      height:100vh;
      width:240px;
      transform:none;
      border-left:0;
      border-right:1px solid var(--line);
      box-shadow:none;
      flex:0 0 240px;
    }
  }

  .nav-link{
    position:relative;
    display:flex;
    align-items:center;
    gap:.5rem;
    padding:.625rem .75rem;
    margin-bottom:.125rem;
    border-radius:10px;
    font-size:14px;
    color:var(--ink-soft);
    transition:background-color .15s ease, color .15s ease;
  }
  .nav-link:hover{ background:rgba(232,237,255,.65); color:var(--ink); }
  .nav-link.active{
    background:var(--primary-tint);
    color:var(--primary-deep);
    font-weight:600;
  }
  .nav-link.active::before{
    content:'';
    position:absolute;
    left:0;
    top:50%;
    transform:translateY(-50%);
    width:3px;
    height:18px;
    border-radius:0 3px 3px 0;
    background:var(--primary);
  }

  /* 遮罩 */
  .overlay{
    position:fixed;
    inset:0;
    background:rgba(16,24,40,.45);
    opacity:0;
    visibility:hidden;
    transition:opacity .25s ease, visibility .25s ease;
    z-index:40;
  }
  .overlay.show{ opacity:1; visibility:visible; }

  /* 按钮 */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:.5rem;
    min-height:46px;
    padding:0 1.35rem;
    border-radius:var(--radius-btn);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    white-space:nowrap;
    transition:background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
  }
  .btn-primary{
    background:var(--primary);
    color:#fff;
    box-shadow:0 12px 24px -14px rgba(53,82,217,.9);
  }
  .btn-primary:hover{ background:var(--primary-deep); transform:translateY(-2px); }
  .btn-primary:active{ transform:translateY(0); }
  .btn-outline{
    background:#fff;
    color:var(--primary);
    border-color:var(--primary);
  }
  .btn-outline:hover{ background:var(--primary-tint); transform:translateY(-2px); }
  .btn-outline:active{ transform:translateY(0); }
  .btn-light{
    background:rgba(255,255,255,.12);
    color:#fff;
    border-color:rgba(255,255,255,.45);
  }
  .btn-light:hover{ background:rgba(255,255,255,.24); transform:translateY(-2px); }
  .btn-light:active{ transform:translateY(0); }
  .btn[disabled],.btn.is-disabled{ opacity:.55; cursor:not-allowed; transform:none; }

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:.5rem;
    font-size:12px;
    font-weight:600;
    letter-spacing:.02em;
    color:var(--primary);
    background:var(--primary-tint);
    border-radius:999px;
    padding:.3rem .75rem;
  }

  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    transition:box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  }
  .card-hover:hover{
    box-shadow:var(--shadow-hover);
    transform:translateY(-2px);
    border-color:#D3DCF5;
  }

  .step-num{
    font-size:44px;
    line-height:1;
    font-weight:800;
    color:var(--primary-tint);
    letter-spacing:-.02em;
    font-variant-numeric:tabular-nums;
  }

  .scene-card{ scroll-snap-align:start; }

  /* FAQ */
  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    overflow:hidden;
    transition:box-shadow .2s ease, border-color .2s ease;
  }
  .faq-item + .faq-item{ margin-top:12px; }
  .faq-item[open]{
    border-color:#C9D4F7;
    box-shadow:var(--shadow-card);
  }
  .faq-item summary{
    position:relative;
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:1rem;
    padding:1.05rem 1.25rem 1.05rem 1.4rem;
    font-size:15.5px;
    font-weight:600;
    color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary::before{
    content:'';
    position:absolute;
    left:0;
    top:12px;
    bottom:12px;
    width:3px;
    border-radius:0 3px 3px 0;
    background:var(--primary);
    opacity:0;
    transition:opacity .2s ease;
  }
  .faq-item[open] summary::before{ opacity:1; }
  .faq-icon{
    flex:none;
    width:20px;
    height:20px;
    color:var(--ink-faint);
    transition:transform .2s ease, color .2s ease;
  }
  .faq-item[open] .faq-icon{ transform:rotate(180deg); color:var(--primary); }
  .faq-body{
    padding:0 1.25rem 1.2rem 1.4rem;
    font-size:14.8px;
    color:var(--ink-soft);
    line-height:1.85;
  }

  .link-arrow{
    display:inline-flex;
    align-items:center;
    gap:.35rem;
    color:var(--primary);
    font-weight:600;
    font-size:14.5px;
    transition:gap .18s ease, color .18s ease;
  }
  .link-arrow:hover{ gap:.6rem; color:var(--primary-deep); text-decoration:underline; text-underline-offset:3px; }

  .scrollbar-thin::-webkit-scrollbar{ height:8px; }
  .scrollbar-thin::-webkit-scrollbar-thumb{ background:#D7DEF0; border-radius:999px; }
  .scrollbar-thin::-webkit-scrollbar-track{ background:transparent; }

/* roulang page: category2 */
:root{
    --primary:#3552D9;
    --primary-dark:#2139A8;
    --primary-light:#E8EDFF;
    --primary-tint:#F4F6FF;
    --accent:#FF8A3D;
    --accent-light:#FFF1E6;
    --mint:#17B3A3;
    --ink:#101828;
    --muted:#5A6478;
    --faint:#8A93A6;
    --line:#E4E9F2;
    --pagebg:#F6F8FC;
    --card:#FFFFFF;
    --radius-card:14px;
    --radius-btn:10px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--pagebg);
    color:var(--muted);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{color:var(--ink);margin:0;letter-spacing:.01em;line-height:1.35;}
  p{margin:0;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;}
  ul{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

  .num{font-variant-numeric:tabular-nums;}

  /* 侧栏导航 */
  .nav-link{
    display:flex;align-items:center;gap:10px;
    position:relative;
    padding:10px 12px;
    margin-bottom:2px;
    border-radius:10px;
    font-size:14.5px;
    color:var(--muted);
    transition:background .15s ease,color .15s ease;
  }
  .nav-link:hover{background:var(--primary-light);color:var(--primary-dark);}
  .nav-link.active{
    background:var(--primary-light);
    color:var(--primary-dark);
    font-weight:700;
  }
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:20px;border-radius:0 3px 3px 0;background:var(--primary);
  }
  .nav-link .dot{
    width:6px;height:6px;border-radius:50%;background:#CBD4E6;flex:none;
  }
  .nav-link.active .dot{background:var(--primary);}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;
    padding:12px 22px;
    border:1px solid transparent;
    cursor:pointer;
    transition:background .16s ease,color .16s ease,box-shadow .16s ease,transform .16s ease,border-color .16s ease;
    min-height:44px;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 20px -12px rgba(53,82,217,.9);}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 16px 26px -12px rgba(33,57,168,.85);}
  .btn-primary:active{transform:translateY(1px);box-shadow:none;}
  .btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
  .btn-ghost:hover{background:var(--primary-light);transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{padding:9px 16px;font-size:13.5px;min-height:38px;}

  /* 徽章 / 标签 */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;font-weight:600;
    padding:4px 10px;border-radius:999px;
    background:var(--primary-light);color:var(--primary-dark);
  }
  .badge-accent{background:var(--accent-light);color:#B4520F;}
  .badge-mint{background:#E6F7F5;color:#0E7E73;}
  .badge-plain{background:#F1F4FA;color:var(--muted);}

  /* 卡片 */
  .card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  }
  .card-hover:hover{box-shadow:0 2px 4px rgba(16,24,40,.06), 0 20px 38px -14px rgba(33,64,154,.28);transform:translateY(-2px);border-color:#D6DEF5;}

  /* 时间轴 */
  .timeline{position:relative;}
  .timeline::before{
    content:"";position:absolute;left:19px;top:12px;bottom:16px;width:2px;
    background:linear-gradient(180deg,var(--primary) 0%,#B9C6F2 62%,#E4E9F2 100%);
    border-radius:2px;
  }
  .tl-item{position:relative;padding-left:64px;padding-bottom:34px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-dot{
    position:absolute;left:0;top:0;
    width:40px;height:40px;border-radius:12px;
    background:#fff;border:1px solid var(--line);
    display:grid;place-items:center;
    font-size:14px;font-weight:800;color:var(--primary);
    box-shadow:0 8px 18px -12px rgba(33,64,154,.5);
    font-variant-numeric:tabular-nums;
  }
  .tl-item.is-key .tl-dot{background:var(--primary);color:#fff;border-color:var(--primary);}

  /* 检查表 */
  .check-table{
    width:100%;border-collapse:separate;border-spacing:0;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
    font-size:14.5px;
  }
  .check-table th{
    background:#F8FAFF;color:var(--ink);font-weight:700;font-size:13.5px;
    text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
  }
  .check-table td{
    padding:15px 18px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top;
  }
  .check-table tr:last-child td{border-bottom:none;}
  .check-table tr:hover td{background:#FBFCFF;}
  .check-table td strong{color:var(--ink);font-weight:700;}

  /* FAQ */
  .faq-item{border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;margin-bottom:12px;overflow:hidden;transition:border-color .16s ease,box-shadow .16s ease;}
  .faq-item:hover{border-color:#D6DEF5;}
  .faq-item.open{border-color:#C4CFF3;box-shadow:0 12px 26px -18px rgba(33,64,154,.6);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:16px 20px 16px 18px;background:transparent;border:0;cursor:pointer;
    text-align:left;font-size:15.5px;font-weight:600;color:var(--ink);
    position:relative;transition:background .16s ease;
  }
  .faq-q:hover{background:#FAFBFF;}
  .faq-item.open .faq-q{background:#FAFBFF;}
  .faq-item.open .faq-q::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);
  }
  .faq-arrow{
    flex:none;width:26px;height:26px;border-radius:8px;background:var(--primary-tint);
    display:grid;place-items:center;color:var(--primary);transition:transform .2s ease;
  }
  .faq-item.open .faq-arrow{transform:rotate(180deg);background:var(--primary-light);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease;}
  .faq-a-inner{padding:2px 22px 20px 21px;font-size:14.5px;color:var(--muted);line-height:1.85;}

  /* 图片遮罩 */
  .hero-mask{background:linear-gradient(90deg,rgba(16,28,74,.72) 0%,rgba(16,28,74,.46) 48%,rgba(16,28,74,.14) 100%);}

  /* 抽屉 */
  #drawer{transform:translateX(100%);transition:transform .26s ease;}
  #drawer.open{transform:translateX(0);}
  #overlay{opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;}
  #overlay.open{opacity:1;visibility:visible;}
  body.no-scroll{overflow:hidden;}

  /* 装饰纹理 */
  .dot-grid{
    background-image:radial-gradient(rgba(53,82,217,.16) 1px, transparent 1px);
    background-size:16px 16px;opacity:.5;
  }

  @media (max-width:1023px){
    .timeline::before{left:17px;}
    .tl-item{padding-left:54px;padding-bottom:28px;}
    .tl-dot{width:36px;height:36px;border-radius:10px;font-size:13px;}
  }
  @media (max-width:639px){
    body{font-size:15.5px;}
    .check-table{font-size:14px;}
    .check-table th,.check-table td{padding:12px 13px;}
    .btn{width:100%;}
    .btn-inline{width:auto;}
  }

/* roulang page: category3 */
:root{
    --primary:#3552D9;
    --primary-deep:#2139A8;
    --primary-soft:#E8EDFF;
    --primary-tint:#F4F6FF;
    --accent:#FF8A3D;
    --accent-soft:#FFF1E6;
    --mint:#17B3A3;
    --ink:#101828;
    --sub:#5A6478;
    --muted:#8A93A6;
    --line:#E4E9F2;
    --pagebg:#F6F8FC;
    --footer:#0E1729;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 4px rgba(16,24,40,.05), 0 22px 40px -16px rgba(33,64,154,.28);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--pagebg);
    color:var(--ink);
    font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
  h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
  ul,ol{padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
  .num{font-variant-numeric:tabular-nums}

  /* 侧栏与抽屉导航 */
  .nav-link{
    position:relative;display:flex;align-items:center;gap:10px;
    padding:10px 12px;border-radius:10px;
    font-size:14px;color:var(--sub);
    transition:background-color .15s ease,color .15s ease;
  }
  .nav-link:hover{background:rgba(232,237,255,.62);color:var(--primary-deep)}
  .nav-link.active{background:var(--primary-soft);color:var(--primary-deep);font-weight:700}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:18px;border-radius:2px;background:var(--primary);
  }
  .nav-dot{width:6px;height:6px;border-radius:999px;background:#C6CEE6;flex:0 0 auto;transition:background-color .15s ease}
  .nav-link:hover .nav-dot,.nav-link.active .nav-dot{background:var(--primary)}

  /* 按钮 */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;
    border-radius:var(--radius-btn);font-size:14.5px;font-weight:600;line-height:1;
    transition:background-color .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease,border-color .16s ease;white-space:nowrap}
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px -12px rgba(53,82,217,.75)}
  .btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 16px 28px -14px rgba(33,57,168,.8)}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 6px 14px -10px rgba(33,57,168,.7)}
  .btn-ghost{background:#fff;color:var(--primary-deep);border:1px solid var(--primary)}
  .btn-ghost:hover{background:var(--primary-soft);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45);backdrop-filter:blur(2px)}
  .btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-1px)}
  .btn[disabled],.btn.is-disabled{opacity:.55;cursor:not-allowed;transform:none!important;box-shadow:none}
  .btn-sm{height:38px;padding:0 16px;font-size:13.5px}
  .link-text{color:var(--primary-deep);text-underline-offset:3px}
  .link-text:hover{text-decoration:underline}

  /* 标签与徽章 */
  .tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
    font-size:12px;font-weight:600;background:var(--primary-soft);color:var(--primary-deep)}
  .tag-accent{background:var(--accent-soft);color:#B4541A}
  .tag-mint{background:rgba(23,179,163,.12);color:#0E8578}
  .tag-light{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
    font-size:12px;font-weight:600;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.32)}
  .badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600;
    background:rgba(255,255,255,.94);color:var(--primary-deep);box-shadow:0 2px 8px -4px rgba(16,24,40,.3)}

  /* 卡片 */
  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
    transition:transform .18s ease,box-shadow .18s ease}
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
  .card-pad{padding:22px}

  /* 横向卡片带 */
  .band{display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 16px}
  .band-card{flex:0 0 auto;width:282px;scroll-snap-align:start;display:flex;flex-direction:column;overflow:hidden}
  .band::-webkit-scrollbar{height:8px}
  .band::-webkit-scrollbar-track{background:#EDF1FA;border-radius:999px}
  .band::-webkit-scrollbar-thumb{background:#CBD5EC;border-radius:999px}
  .band::-webkit-scrollbar-thumb:hover{background:#B4C1E2}
  @media (min-width:640px){.band-card{width:320px}}
  @media (min-width:1024px){.band-card{width:344px}}

  /* 数值强调块 */
  .stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 20px;
    box-shadow:var(--shadow-card);transition:transform .18s ease,box-shadow .18s ease}
  .stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
  .stat-num{font-size:34px;font-weight:800;line-height:1.1;letter-spacing:.01em;color:var(--primary-deep);font-variant-numeric:tabular-nums}
  .stat-num.accent{color:#D9711F}

  /* 步骤 */
  .step{display:flex;gap:18px;padding:20px 0;border-bottom:1px dashed var(--line)}
  .step:last-child{border-bottom:0}
  .step-idx{flex:0 0 auto;width:42px;height:42px;border-radius:12px;background:var(--primary-tint);color:var(--primary-deep);
    display:grid;place-items:center;font-weight:800;font-size:15px;border:1px solid var(--primary-soft);font-variant-numeric:tabular-nums}

  /* 信息块列表 */
  .check-list li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;font-size:14.5px;color:var(--sub)}
  .check-ico{flex:0 0 auto;width:20px;height:20px;border-radius:999px;background:rgba(23,179,163,.14);color:#0E8578;
    display:grid;place-items:center;font-size:11px;font-weight:800;margin-top:4px}
  .check-ico.orange{background:var(--accent-soft);color:#B4541A}

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
    overflow:hidden;transition:box-shadow .2s ease,background-color .2s ease}
  .faq-item + .faq-item{margin-top:12px}
  .faq-item.open{box-shadow:var(--shadow-card),inset 3px 0 0 0 var(--primary)}
  .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;text-align:left;font-size:15.5px;font-weight:600;color:var(--ink);transition:color .18s ease}
  .faq-q:hover{color:var(--primary-deep)}
  .faq-item.open .faq-q{color:var(--primary-deep)}
  .faq-icon{flex:0 0 auto;width:22px;height:22px;color:var(--muted);transition:transform .25s ease}
  .faq-item.open .faq-icon{transform:rotate(180deg);color:var(--primary)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
  .faq-item.open .faq-a{max-height:340px}
  .faq-a-inner{padding:0 20px 20px;font-size:14.5px;color:var(--sub)}

  /* 相关分类 */
  .mini-link{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;
    background:#fff;border:1px solid var(--line);border-radius:12px;font-size:14px;font-weight:600;color:var(--sub);
    transition:border-color .16s ease,color .16s ease,transform .16s ease}
  .mini-link:hover{border-color:var(--primary);color:var(--primary-deep);transform:translateY(-2px)}

  .cover-ph{background:var(--primary-soft)}
  @media (max-width:520px){
    .stat-num{font-size:28px}
    .faq-q{font-size:14.5px;padding:16px}
    .faq-a-inner{padding:0 16px 18px}
  }

/* roulang page: category4 */
:root{
    --c-primary:#3552D9;
    --c-primary-dark:#2139A8;
    --c-primary-light:#E8EDFF;
    --c-accent:#FF8A3D;
    --c-mint:#17B3A3;
    --c-ink:#101828;
    --c-sub:#5A6478;
    --c-muted:#8A93A6;
    --c-line:#E4E9F2;
    --c-page:#F6F8FC;
    --r-card:14px;
    --r-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 6px rgba(16,24,40,.06), 0 18px 34px -14px rgba(33,64,154,.30);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--c-page);
    color:var(--c-ink);
    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,select,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  table{border-collapse:collapse;width:100%;}
  :focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

  /* ---------- 侧栏导航 ---------- */
  .nav-link{
    display:flex;align-items:center;gap:10px;
    padding:10px 12px;margin:2px 0;border-radius:10px;
    font-size:14px;line-height:1.5;color:var(--c-sub);
    border-left:3px solid transparent;
    transition:background .15s ease,color .15s ease,border-color .15s ease;
  }
  .nav-link:hover{background:rgba(232,237,255,.6);color:var(--c-primary-dark);}
  .nav-link.active{background:var(--c-primary-light);color:var(--c-primary-dark);font-weight:600;border-left-color:var(--c-primary);}
  .nav-dot{width:5px;height:5px;border-radius:999px;background:currentColor;opacity:.45;flex:0 0 auto;}
  .nav-link.active .nav-dot{opacity:1;background:var(--c-primary);}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border:1px solid transparent;
    border-radius:var(--r-btn);font-size:15px;font-weight:600;
    cursor:pointer;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 20px -12px rgba(53,82,217,.95);}
  .btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-2px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-outline{background:#fff;color:var(--c-primary-dark);border-color:var(--c-primary);}
  .btn-outline:hover{background:var(--c-primary-light);transform:translateY(-2px);}
  .btn-white{background:#fff;color:var(--c-primary-dark);}
  .btn-white:hover{background:var(--c-primary-light);transform:translateY(-2px);}
  .btn-soft{background:var(--c-primary-light);color:var(--c-primary-dark);}
  .btn-soft:hover{background:#dbe4ff;}
  .btn[aria-disabled="true"],.btn.is-disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}

  /* ---------- 通用卡片 ---------- */
  .card{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);
  }
  .card-hover{transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#d6ddf0;}

  .tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.7;
  }
  .tag-primary{background:var(--c-primary-light);color:var(--c-primary-dark);}
  .tag-accent{background:#FFF1E6;color:#C25717;}
  .tag-mint{background:rgba(23,179,163,.12);color:#0E7C71;}
  .tag-plain{background:#F1F4FA;color:var(--c-sub);}

  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
    background:rgba(255,138,61,.18);color:#FFD3B2;border:1px solid rgba(255,138,61,.35);
  }

  /* ---------- 对照两栏 ---------- */
  .compare-col{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-card);overflow:hidden;}
  .compare-head{padding:20px 22px;border-bottom:1px solid var(--c-line);}
  .compare-row{display:flex;gap:14px;padding:16px 22px;border-bottom:1px dashed var(--c-line);}
  .compare-row:last-child{border-bottom:none;}
  .compare-key{flex:0 0 88px;font-size:13.5px;color:var(--c-muted);}
  .compare-val{flex:1;font-size:14.5px;line-height:1.75;color:var(--c-sub);}
  .vs-mark{
    width:44px;height:44px;border-radius:999px;background:#fff;border:1px solid var(--c-line);
    box-shadow:var(--shadow-card);display:grid;place-items:center;
    font-size:13px;font-weight:800;color:var(--c-primary-dark);letter-spacing:.02em;
  }

  /* ---------- 细表格 ---------- */
  .rate-table{min-width:760px;font-size:14.5px;}
  .rate-table th{
    background:var(--c-primary-tint,#F4F6FF);
    color:var(--c-primary-dark);font-weight:600;text-align:left;
    padding:14px 16px;border-bottom:1px solid var(--c-line);white-space:nowrap;font-size:13.5px;
  }
  .rate-table td{
    padding:15px 16px;border-bottom:1px solid var(--c-line);
    color:var(--c-sub);vertical-align:top;line-height:1.7;
  }
  .rate-table tbody tr:last-child td{border-bottom:none;}
  .rate-table tbody tr:hover td{background:#FAFBFF;}
  .rate-table td:first-child{color:var(--c-ink);font-weight:600;}

  /* ---------- 数值块 ---------- */
  .stat-num{
    font-variant-numeric:tabular-nums;
    font-size:30px;line-height:1.2;font-weight:800;color:var(--c-primary-dark);
  }

  /* ---------- 步骤 ---------- */
  .step-item{position:relative;padding-left:52px;}
  .step-item::before{
    content:'';position:absolute;left:19px;top:44px;bottom:-24px;width:1px;background:var(--c-line);
  }
  .step-item:last-child::before{display:none;}
  .step-num{
    position:absolute;left:0;top:0;width:38px;height:38px;border-radius:12px;
    background:var(--c-primary-light);color:var(--c-primary-dark);
    display:grid;place-items:center;font-weight:800;font-size:15px;
    font-variant-numeric:tabular-nums;
  }

  /* ---------- FAQ ---------- */
  .faq-item{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item + .faq-item{margin-top:12px;}
  .faq-item[open]{border-left:3px solid var(--c-primary);box-shadow:var(--shadow-card);}
  .faq-item summary{
    cursor:pointer;list-style:none;padding:18px 22px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    font-size:15.5px;font-weight:600;color:var(--c-ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{background:#FAFBFF;}
  .faq-chev{flex:0 0 auto;color:var(--c-muted);transition:transform .22s ease,color .22s ease;}
  .faq-item[open] .faq-chev{transform:rotate(180deg);color:var(--c-primary);}
  .faq-body{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--c-sub);}

  /* ---------- 抽屉 ---------- */
  #drawerPanel{transform:translateX(100%);}
  #drawerPanel.is-open{transform:translateX(0);}
  body.drawer-locked{overflow:hidden;}

  .link-underline{color:var(--c-primary-dark);text-decoration:underline;text-underline-offset:3px;}
  .link-underline:hover{color:var(--c-primary);}

  @media (max-width:640px){
    .compare-key{flex:0 0 74px;font-size:13px;}
    .step-item{padding-left:46px;}
    .step-item::before{left:17px;}
    .stat-num{font-size:26px;}
  }

/* roulang page: category5 */
:root{
    --primary:#3552D9;
    --primary-dark:#2139A8;
    --primary-light:#E8EDFF;
    --primary-tint:#F4F6FF;
    --accent:#FF8A3D;
    --accent-light:#FFF1E6;
    --mint:#17B3A3;
    --ink:#101828;
    --sub:#5A6478;
    --muted:#8A93A6;
    --line:#E4E9F2;
    --bg:#F6F8FC;
    --card:#FFFFFF;
    --footerbg:#0E1729;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 12px 28px -12px rgba(33,64,154,.18);
    --shadow-hover:0 2px 4px rgba(16,24,40,.05), 0 20px 40px -16px rgba(33,64,154,.30);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
  input,select,textarea{font-family:inherit}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul,ol{padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

  /* 侧栏 */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:240px;z-index:50;
    background:#fff;border-right:1px solid var(--line);
    display:flex;flex-direction:column;
  }
  .nav-link{
    position:relative;display:flex;align-items:center;
    padding:10px 12px;margin-bottom:2px;border-radius:10px;
    font-size:14px;color:var(--sub);
    transition:background .15s ease,color .15s ease;
  }
  .nav-link:hover{background:rgba(232,237,255,.7);color:var(--primary-dark)}
  .nav-link.active{background:var(--primary-light);color:var(--primary-dark);font-weight:700}
  .nav-link.active::before{
    content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--primary);
  }

  /* 移动端顶栏与抽屉 */
  .mobile-topbar{position:sticky;top:0;z-index:45;background:#fff;border-bottom:1px solid var(--line)}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:70;
    background:#fff;display:flex;flex-direction:column;
    transform:translateX(102%);transition:transform .28s ease;
    box-shadow:-18px 0 40px -22px rgba(16,24,40,.45);
  }
  .drawer.open{transform:translateX(0)}
  .drawer-mask{
    position:fixed;inset:0;z-index:60;background:rgba(16,24,40,.45);
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  }
  .drawer-mask.open{opacity:1;visibility:visible}

  /* 通用组件 */
  .card{
    background:var(--card);border:1px solid var(--line);
    border-radius:var(--radius-card);box-shadow:var(--shadow-card);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D6DEF6}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;white-space:nowrap;
    transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px -12px rgba(53,82,217,.95)}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(1px);box-shadow:none}
  .btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--primary)}
  .btn-ghost:hover{background:var(--primary-light);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-sm{min-height:38px;padding:0 16px;font-size:14px}
  .btn-block{width:100%}
  .btn.is-disabled,.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
  .btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
  .btn-text:hover{text-decoration:underline;text-underline-offset:3px}

  .tag{
    display:inline-flex;align-items:center;gap:5px;
    font-size:12px;font-weight:600;line-height:1.6;
    padding:3px 10px;border-radius:999px;
    background:var(--primary-light);color:var(--primary-dark);
  }
  .tag-accent{background:var(--accent-light);color:#B45B14}
  .tag-mint{background:rgba(23,179,163,.12);color:#0E8479}
  .tag-line{background:#F2F5FB;color:var(--sub)}

  .chip{
    display:inline-flex;align-items:center;height:36px;padding:0 16px;
    border-radius:999px;border:1px solid var(--line);background:#fff;
    font-size:13.5px;color:var(--sub);transition:all .15s ease;
  }
  .chip:hover{border-color:var(--primary);color:var(--primary)}
  .chip.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}

  /* 常见问题手风琴 */
  .faq-item{
    position:relative;background:#fff;border:1px solid var(--line);
    border-radius:12px;overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
  }
  .faq-item + .faq-item{margin-top:12px}
  .faq-item.hide{display:none}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    text-align:left;padding:18px 20px 18px 22px;font-size:16px;font-weight:600;color:var(--ink);
    transition:background .15s ease,color .15s ease;
  }
  .faq-q:hover{background:var(--primary-tint)}
  .faq-item.open{border-color:#D5DDF5;box-shadow:var(--shadow-card)}
  .faq-item.open .faq-q{background:var(--primary-tint);color:var(--primary-dark)}
  .faq-item.open::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);
  }
  .faq-icon{flex:none;font-size:13px;color:var(--muted);transition:transform .25s ease,color .25s ease}
  .faq-item.open .faq-icon{transform:rotate(180deg);color:var(--primary)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
  .faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--sub)}
  .faq-a-inner strong{color:var(--ink)}

  /* 表单 */
  .field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:6px}
  .field .hint{font-size:12.5px;color:var(--muted);margin-top:6px}
  .field input,.field select,.field textarea{
    width:100%;background:#fff;border:1px solid var(--line);border-radius:10px;
    padding:11px 14px;font-size:14.5px;color:var(--ink);line-height:1.6;
    transition:border-color .15s ease,box-shadow .15s ease;
  }
  .field textarea{resize:vertical;min-height:118px}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(53,82,217,.14);
  }

  .stat-num{font-size:32px;font-weight:800;letter-spacing:.01em;line-height:1.2;color:var(--primary-dark)}
  .num-mint{color:#0E8479}
  .num-accent{color:#C4641C}

  .section-title{font-size:27px;font-weight:700;letter-spacing:.01em;line-height:1.45}
  .section-sub{font-size:15px;color:var(--sub);line-height:1.85}

  .link-card{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:#fff;
    transition:all .18s ease;font-size:14.5px;font-weight:600;color:var(--ink);
  }
  .link-card:hover{border-color:var(--primary);background:var(--primary-tint);transform:translateY(-2px)}
  .link-card i{font-size:12px;color:var(--muted);transition:transform .18s ease,color .18s ease}
  .link-card:hover i{color:var(--primary);transform:translateX(3px)}

  .deco-band{
    background:
      repeating-linear-gradient(135deg, rgba(53,82,217,.05) 0 10px, transparent 10px 20px);
  }

  @media (max-width:1023px){
    .sidebar{display:none}
  }
  @media (min-width:1024px){
    .mobile-topbar,.drawer,.drawer-mask{display:none}
  }
  @media (max-width:640px){
    .section-title{font-size:21px}
    .faq-q{font-size:15px;padding:16px 16px 16px 18px}
    .faq-a-inner{padding:0 18px 18px;font-size:14.5px}
    .stat-num{font-size:27px}
  }