/* roulang page: index */
:root{
    --spruce:#17594E; --spruce-deep:#0E3A33; --spruce-light:#E8F1EE;
    --clay:#E0763A; --clay-light:#F2A15F; --celadon:#7FA99B;
    --paper:#F7F5F0; --night:#0E2A26; --card:#FFFFFF;
    --ink:#16211E; --ink-mid:#55605B; --ink-soft:#8A948F;
    --border:#E6E2D9;
    --r-card:16px; --r-img:14px; --r-btn:10px; --r-block:20px;
    --sh-1:0 1px 2px rgba(14,42,38,.06);
    --sh-2:0 8px 24px rgba(14,42,38,.08);
    --sh-3:0 16px 36px rgba(14,42,38,.14);
  }
  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0; background:var(--paper); color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px; line-height:1.85; padding-top:68px;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; cursor:pointer; }
  p{ margin:0 0 1.15em; }
  h1,h2,h3,h4{ margin:0; font-weight:700; color:var(--ink); }
  h1{ font-size:clamp(28px,4.4vw,44px); line-height:1.25; }
  h2{ font-size:clamp(22px,3vw,32px); line-height:1.3; margin-top:2.2em; margin-bottom:.9em; }
  h3{ font-size:20px; line-height:1.4; margin-top:1.6em; margin-bottom:.6em; }
  h4{ font-size:17px; line-height:1.5; margin-bottom:.5em; }
  :focus-visible{ outline:2px solid var(--spruce); outline-offset:2px; border-radius:6px; }
  .num{ font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; }

  .container-x{ width:100%; max-width:1200px; margin:0 auto; padding:0 18px; }
  @media (min-width:768px){ .container-x{ padding:0 24px; } }
  @media (min-width:1024px){ .container-x{ padding:0 32px; } }

  .section{ padding:48px 0; }
  @media (min-width:768px){ .section{ padding:64px 0; } }
  @media (min-width:1024px){ .section{ padding:88px 0; } }

  .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13px; font-weight:600; letter-spacing:.04em;
    color:var(--spruce); background:var(--spruce-light);
    padding:6px 14px; border-radius:999px;
  }

  /* 按钮族 */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    min-height:44px; padding:0 22px; border-radius:var(--r-btn);
    font-size:15px; font-weight:600; border:1.5px solid transparent;
    transition:background-color .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .btn-primary{ background:var(--spruce); color:#fff; }
  .btn-primary:hover{ background:var(--spruce-deep); transform:translateY(-1px); box-shadow:var(--sh-2); }
  .btn-primary:active{ transform:translateY(0); }
  .btn-ghost{ background:#fff; color:var(--spruce); border-color:var(--spruce); }
  .btn-ghost:hover{ background:var(--spruce-light); transform:translateY(-1px); }
  .btn-clay{ background:var(--clay); color:#fff; }
  .btn-clay:hover{ background:#C9642C; transform:translateY(-1px); box-shadow:var(--sh-2); }
  .btn-text{
    display:inline-flex; align-items:center; gap:6px; padding:0; min-height:auto;
    color:var(--spruce); font-weight:600; font-size:15px;
    border-bottom:1px solid rgba(23,89,78,.4); padding-bottom:2px;
  }
  .btn-text:hover{ color:var(--clay); border-color:var(--clay); }
  .btn[disabled]{ opacity:.6; filter:saturate(.6); }

  .badge{
    display:inline-flex; align-items:center; gap:5px;
    font-size:12.5px; font-weight:600; line-height:1;
    padding:6px 11px; border-radius:999px;
    background:rgba(23,89,78,.08); color:var(--spruce);
  }
  .badge-clay{ background:rgba(224,118,58,.12); color:#B85A20; }
  .badge-celadon{ background:rgba(127,169,155,.18); color:#3F6B5C; }

  /* 卡片 */
  .card{
    background:var(--card); border:1px solid var(--border); border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .card:hover{ transform:translateY(-2px); border-color:rgba(23,89,78,.3); box-shadow:var(--sh-2); }
  .card-media{ overflow:hidden; border-radius:var(--r-img); }
  .card-media img{ width:100%; height:100%; object-fit:cover; transition:transform .35s ease-out; }
  .card:hover .card-media img{ transform:scale(1.04); }
  .clamp-2{ display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
  .clamp-3{ display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }

  /* 导航 */
  .site-header{
    position:fixed; top:0; left:0; right:0; z-index:60; height:68px;
    background:rgba(255,255,255,.96); backdrop-filter:blur(6px);
    transition:box-shadow .2s ease-out, border-color .2s ease-out;
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{ border-bottom-color:var(--border); box-shadow:0 4px 18px rgba(14,42,38,.07); }
  .nav-link{
    position:relative; font-size:15px; font-weight:500; color:var(--ink-mid);
    padding:8px 2px; transition:color .18s ease-out;
  }
  .nav-link:hover{ color:var(--spruce); }
  .nav-link.active{ color:var(--spruce); font-weight:600; }
  .nav-link::after{
    content:""; position:absolute; left:0; right:0; bottom:0; height:2px;
    background:var(--clay); border-radius:2px; transform:scaleX(0); transform-origin:left;
    transition:transform .2s ease-out;
  }
  .nav-link:hover::after, .nav-link.active::after{ transform:scaleX(1); }

  .drawer{
    position:fixed; top:0; right:0; bottom:0; width:min(84vw,340px); z-index:80;
    background:#fff; box-shadow:-12px 0 40px rgba(14,42,38,.18);
    transform:translateX(100%); transition:transform .28s ease-out;
    padding:22px 20px calc(28px + env(safe-area-inset-bottom));
    overflow-y:auto;
  }
  .drawer.is-open{ transform:translateX(0); }
  .drawer-mask{
    position:fixed; inset:0; background:rgba(14,42,38,.42); z-index:70;
    opacity:0; visibility:hidden; transition:opacity .25s ease-out, visibility .25s;
  }
  .drawer-mask.is-open{ opacity:1; visibility:visible; }
  .drawer-link{
    display:flex; align-items:center; justify-content:space-between;
    padding:14px 12px; border-radius:10px; font-size:16px; color:var(--ink-mid);
    border-bottom:1px solid var(--border);
  }
  .drawer-link.active{ color:var(--spruce); font-weight:600; background:var(--spruce-light); border-bottom-color:transparent; }

  /* 底部 Tab */
  .mobile-tab{
    position:fixed; left:0; right:0; bottom:0; z-index:60;
    display:flex; background:#fff; border-top:1px solid var(--border);
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -4px 18px rgba(14,42,38,.06);
  }
  .mobile-tab a{
    flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center;
    gap:3px; padding:8px 2px; font-size:11px; line-height:1.2; color:var(--ink-soft);
    min-height:56px; transition:color .18s ease-out;
  }
  .mobile-tab a i{ font-size:22px; color:var(--ink-soft); transition:color .18s ease-out; }
  .mobile-tab a.active{ color:var(--spruce); font-weight:600; }
  .mobile-tab a.active i{ color:var(--clay); }
  @media (min-width:1024px){ .mobile-tab{ display:none; } }
  @media (max-width:1023px){ body{ padding-bottom:76px; } }

  /* Hero */
  .hero-shell{ position:relative; overflow:hidden; }
  .hero-bg{ position:absolute; inset:0; background-size:cover; background-position:center; }
  .hero-veil{
    position:absolute; inset:0;
    background:linear-gradient(103deg, rgba(23,89,78,.95) 0%, rgba(23,89,78,.86) 42%, rgba(14,42,38,.6) 100%);
  }
  .hero-point{ border-left:1px solid rgba(242,239,232,.32); padding-left:18px; }
  @media (max-width:767px){ .hero-point{ border-left:0; border-top:1px solid rgba(242,239,232,.28); padding-left:0; padding-top:12px; } }

  /* 合集目录 */
  .toc-btn{
    width:100%; display:flex; align-items:flex-start; gap:14px; text-align:left;
    background:transparent; border:0; border-left:3px solid transparent;
    padding:16px 14px; border-radius:0 10px 10px 0;
    transition:border-color .2s ease-out, background-color .2s ease-out, transform .2s ease-out;
  }
  .toc-btn:hover{ background:rgba(23,89,78,.05); border-left-color:rgba(23,89,78,.35); transform:translateX(4px); }
  .toc-btn.is-active{ background:var(--spruce-light); border-left-color:var(--spruce); transform:translateX(4px); }
  .toc-num{ font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; font-weight:700; font-size:15px; color:var(--celadon); }
  .toc-btn.is-active .toc-num{ color:var(--clay); }

  /* 横滑 */
  .scroll-x{
    display:flex; gap:20px; overflow-x:auto; padding:6px 2px 20px;
    scroll-snap-type:x mandatory; -webkit-overflow-scrolling:touch;
  }
  .scroll-x > *{ scroll-snap-align:start; flex:0 0 auto; }
  .scroll-x::-webkit-scrollbar{ height:6px; }
  .scroll-x::-webkit-scrollbar-thumb{ background:rgba(23,89,78,.25); border-radius:999px; }
  .scroll-x::-webkit-scrollbar-track{ background:rgba(23,89,78,.07); border-radius:999px; }

  /* 最新信息 */
  .cms-row{
    display:flex; gap:16px; align-items:flex-start;
    background:#fff; border:1px solid var(--border); border-radius:var(--r-card);
    padding:14px; box-shadow:var(--sh-1);
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .cms-row:hover{ transform:translateY(-2px); border-color:rgba(23,89,78,.3); box-shadow:var(--sh-2); }
  .cms-thumb{
    flex:0 0 120px; width:120px; height:80px; border-radius:12px; overflow:hidden;
    background:var(--spruce-light); display:grid; place-items:center;
  }
  .cms-thumb img{ width:100%; height:100%; object-fit:cover; }
  @media (max-width:639px){
    .cms-row{ flex-direction:column; }
    .cms-thumb{ flex:0 0 auto; width:100%; height:150px; }
  }

  /* FAQ */
  .faq-item{ border-bottom:1px solid var(--border); transition:padding-left .2s ease-out, border-color .2s ease-out; }
  .faq-item.is-open{ border-left:3px solid var(--spruce); padding-left:16px; }
  .faq-q{
    width:100%; display:flex; align-items:flex-start; justify-content:space-between; gap:16px;
    background:none; border:0; text-align:left; padding:20px 0;
    font-size:17px; font-weight:600; color:var(--ink); line-height:1.5;
    transition:color .2s ease-out;
  }
  .faq-q:hover{ color:var(--spruce); }
  .faq-item.is-open .faq-q{ color:var(--spruce); }
  .faq-icon{ color:var(--clay); font-size:15px; padding-top:3px; transition:transform .25s ease-out; }
  .faq-item.is-open .faq-icon{ transform:rotate(45deg); }
  .faq-a{ max-height:0; overflow:hidden; transition:max-height .3s ease-out; }
  .faq-item.is-open .faq-a{ max-height:420px; }
  .faq-a p{ margin:0 0 20px; font-size:15px; line-height:1.8; color:var(--ink-mid); }

  /* 深色带 */
  .night-band{ background:var(--night); color:#F2EFE8; }
  .night-band h2, .night-band h3{ color:#F2EFE8; }

  .link-quiet{
    color:rgba(242,239,232,.72); border-bottom:1px solid transparent; padding-bottom:1px;
    transition:color .18s ease-out, border-color .18s ease-out;
  }
  .link-quiet:hover{ color:var(--clay-light); border-bottom-color:var(--clay-light); }
  .foot-link{
    display:inline-block; font-size:14px; color:rgba(242,239,232,.74);
    padding:4px 0; border-bottom:1px solid transparent; transition:color .18s ease-out, border-color .18s ease-out;
  }
  .foot-link:hover{ color:var(--clay-light); border-bottom-color:var(--clay-light); }

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

  @media (prefers-reduced-motion:reduce){
    *{ transition:none !important; animation:none !important; scroll-behavior:auto !important; }
  }

/* roulang page: article */
:root{
    --spruce:#17594E; --spruce-deep:#0E3A33; --spruce-light:#E8F1EE;
    --clay:#E0763A; --clay-light:#F2A15F; --celadon:#7FA99B;
    --paper:#F7F5F0; --night:#0E2A26; --card:#FFFFFF; --line:#E6E2D9;
    --ink:#16211E; --ink2:#55605B; --ink3:#8A948F;
    --r-card:16px; --r-img:14px; --r-btn:10px; --r-block:20px;
    --s1:0 1px 2px rgba(14,42,38,.06);
    --s2:0 8px 24px rgba(14,42,38,.08);
    --s3:0 16px 36px rgba(14,42,38,.14);
    --sec-y:88px;
  }
  @media (max-width:1023px){ :root{ --sec-y:64px; } }
  @media (max-width:640px){ :root{ --sec-y:48px; } }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0; background:var(--paper); color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px; line-height:1.85;
    font-variant-numeric:tabular-nums;
    overflow-x:hidden;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
  input,textarea,select{ font:inherit; color:inherit; }
  h1,h2,h3,h4,p,ul,ol,figure{ margin:0; }
  h1{ font-size:clamp(28px,4.4vw,44px); line-height:1.25; font-weight:700; }
  h2{ font-size:clamp(22px,3vw,32px); line-height:1.3; font-weight:700; }
  h3{ font-size:20px; line-height:1.4; font-weight:600; }
  h4{ font-size:17px; line-height:1.5; font-weight:600; }
  :focus-visible{ outline:2px solid var(--spruce); outline-offset:2px; border-radius:4px; }

  .container-x{ width:100%; max-width:1200px; margin:0 auto; padding-left:32px; padding-right:32px; }
  @media (max-width:1023px){ .container-x{ padding-left:24px; padding-right:24px; } }
  @media (max-width:640px){ .container-x{ padding-left:18px; padding-right:18px; } }

  .section{ padding-top:var(--sec-y); padding-bottom:var(--sec-y); }
  .num{ font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; }

  /* header */
  .site-header{
    position:sticky; top:0; z-index:60;
    background:rgba(255,255,255,.96);
    border-bottom:1px solid transparent;
    transition:box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .site-header.is-scrolled{ border-bottom-color:var(--line); box-shadow:var(--s1); }
  .nav-link{ position:relative; font-size:15px; color:var(--ink2); padding:6px 0; transition:color .18s ease-out; }
  .nav-link:hover{ color:var(--spruce); }
  .nav-link.active{ color:var(--spruce); font-weight:600; }
  .nav-link.active::after{
    content:""; position:absolute; left:0; right:0; bottom:-3px; height:2px;
    background:var(--clay); border-radius:2px;
  }
  .foot-link{ font-size:14px; color:rgba(242,239,232,.78); line-height:1.9; transition:color .18s ease-out; }
  .foot-link:hover{ color:var(--clay-light); text-decoration:underline; text-underline-offset:3px; }

  /* buttons */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    min-height:44px; padding:0 20px; border-radius:var(--r-btn);
    font-size:15px; font-weight:600; white-space:nowrap;
    transition:background-color .18s ease-out, color .18s ease-out, transform .18s ease-out, box-shadow .18s ease-out, border-color .18s ease-out;
  }
  .btn-primary{ background:var(--spruce); color:#fff; box-shadow:var(--s1); }
  .btn-primary:hover{ background:var(--spruce-deep); transform:translateY(-1px); box-shadow:var(--s2); }
  .btn-primary:active{ transform:translateY(0); }
  .btn-ghost{ background:#fff; border:1.5px solid var(--spruce); color:var(--spruce); }
  .btn-ghost:hover{ background:var(--spruce-light); }
  .btn-quiet{ padding:0; min-height:auto; font-size:14px; font-weight:600; color:var(--spruce); text-decoration:underline; text-underline-offset:4px; }
  .btn-quiet:hover{ color:var(--clay); }
  .btn-icon{ width:44px; height:44px; padding:0; border-radius:var(--r-btn); background:rgba(255,255,255,.12); color:#F2EFE8; }
  .btn-icon:hover{ background:rgba(255,255,255,.22); }

  /* chips & badges */
  .badge{
    display:inline-flex; align-items:center; gap:6px;
    height:28px; padding:0 12px; border-radius:999px;
    background:rgba(23,89,78,.08); color:var(--spruce);
    font-size:13px; font-weight:600; line-height:1;
  }
  .badge-clay{ background:rgba(224,118,58,.12); color:#B65420; }
  .badge-outline{ background:#fff; border:1px solid var(--line); color:var(--ink2); font-weight:500; }

  /* breadcrumb */
  .crumb{ display:flex; flex-wrap:wrap; align-items:center; gap:8px; font-size:13px; color:var(--ink3); }
  .crumb a{ color:var(--ink2); }
  .crumb a:hover{ color:var(--spruce); text-decoration:underline; text-underline-offset:3px; }
  .crumb .sep{ color:#C9C4B8; }
  .crumb .cur{ color:var(--ink3); max-width:60vw; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

  /* article body */
  .entry-content{ max-width:760px; font-size:16px; line-height:1.9; color:var(--ink); }
  .entry-content > * + *{ margin-top:1.15em; }
  .entry-content h2{ margin-top:2.2em; margin-bottom:.9em; }
  .entry-content h3{ margin-top:1.6em; margin-bottom:.6em; }
  .entry-content h2:first-child,.entry-content h3:first-child{ margin-top:0; }
  .entry-content p{ line-height:1.9; }
  .entry-content a{ color:var(--spruce); text-decoration:underline; text-underline-offset:3px; }
  .entry-content a:hover{ color:var(--clay); }
  .entry-content ul,.entry-content ol{ padding-left:1.35em; }
  .entry-content li{ line-height:1.8; margin:.4em 0; }
  .entry-content ul li::marker{ color:var(--celadon); }
  .entry-content ol li::marker{ color:var(--spruce); font-weight:600; }
  .entry-content blockquote{
    margin:1.4em 0; padding:14px 20px;
    border-left:4px solid var(--spruce);
    background:rgba(23,89,78,.06);
    border-radius:0 var(--r-btn) var(--r-btn) 0;
    color:var(--ink2);
  }
  .entry-content img{ border-radius:var(--r-img); margin:1.5em auto; box-shadow:var(--s1); }
  .entry-content figure{ margin:1.5em 0; }
  .entry-content figcaption{ margin-top:.6em; text-align:center; font-size:13px; color:var(--ink3); }
  .entry-content table{ width:100%; border-collapse:collapse; margin:1.5em 0; font-size:15px; }
  .entry-content thead th{ background:rgba(23,89,78,.08); color:var(--spruce); font-weight:600; }
  .entry-content th,.entry-content td{ border:1px solid var(--line); padding:10px 14px; text-align:left; }
  .entry-content code{ background:rgba(23,89,78,.08); color:var(--spruce-deep); padding:2px 6px; border-radius:6px; font-size:14px; }
  .entry-content pre{ background:var(--night); color:#F2EFE8; padding:18px; border-radius:var(--r-img); overflow:auto; }

  /* toc */
  .toc-link{ display:block; font-size:14px; color:var(--ink2); line-height:1.7; padding:6px 0 6px 12px; border-left:2px solid var(--line); transition:color .18s ease-out, border-color .18s ease-out; }
  .toc-link:hover{ color:var(--spruce); border-left-color:var(--celadon); }
  .toc-link.is-active{ color:var(--spruce); font-weight:600; border-left-color:var(--clay); }

  /* cards */
  .card{ background:var(--card); border:1px solid var(--line); border-radius:var(--r-card); box-shadow:var(--s1); transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out; }
  .card:hover{ transform:translateY(-2px); box-shadow:var(--s2); border-color:rgba(23,89,78,.3); }
  .card-media{ overflow:hidden; border-radius:var(--r-img); }
  .card-media img{ width:100%; aspect-ratio:16/10; object-fit:cover; transition:transform .3s ease-out; }
  .card:hover .card-media img{ transform:scale(1.04); }
  .clamp2{ display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
  .clamp3{ display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }

  /* faq */
  .faq-item{ border-bottom:1px solid var(--line); }
  .faq-q{ width:100%; display:flex; align-items:flex-start; justify-content:space-between; gap:16px; padding:20px 0 20px 0; text-align:left; }
  .faq-q span{ font-size:17px; font-weight:600; line-height:1.5; }
  .faq-icon{ flex:0 0 auto; width:22px; height:22px; margin-top:2px; color:var(--celadon); transition:transform .22s ease-out, color .22s ease-out; }
  .faq-item.open .faq-icon{ transform:rotate(45deg); color:var(--clay); }
  .faq-a{ max-height:0; overflow:hidden; transition:max-height .28s ease-out; }
  .faq-a p{ font-size:15px; line-height:1.8; color:var(--ink2); padding:0 0 22px 0; max-width:92%; }
  .faq-item.open{ border-left:3px solid var(--spruce); padding-left:16px; }

  /* drawer */
  .drawer{ position:fixed; inset:0; z-index:90; pointer-events:none; }
  .drawer-mask{ position:absolute; inset:0; background:rgba(14,42,38,.45); opacity:0; transition:opacity .24s ease-out; }
  .drawer-panel{
    position:absolute; top:0; right:0; height:100%; width:min(320px,86vw);
    background:#fff; box-shadow:var(--s3); transform:translateX(100%);
    transition:transform .26s ease-out; display:flex; flex-direction:column; padding:20px;
  }
  .drawer.is-open{ pointer-events:auto; }
  .drawer.is-open .drawer-mask{ opacity:1; }
  .drawer.is-open .drawer-panel{ transform:translateX(0); }
  .drawer-link{ display:flex; align-items:center; justify-content:space-between; min-height:48px; padding:0 4px; font-size:16px; color:var(--ink); border-bottom:1px solid var(--line); }
  .drawer-link:hover{ color:var(--spruce); }

  /* mobile tabbar */
  .tabbar{
    position:fixed; left:0; right:0; bottom:0; z-index:70;
    display:flex; background:rgba(255,255,255,.98);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -2px 14px rgba(14,42,38,.06);
  }
  .tab-item{ flex:1 1 0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px; min-height:56px; font-size:11px; color:var(--ink3); transition:color .18s ease-out; }
  .tab-item i{ font-size:19px; }
  .tab-item.active{ color:var(--spruce); }
  .tab-item.active i{ color:var(--clay); }
  @media (max-width:1023px){ body{ padding-bottom:76px; } }
  @media (min-width:1024px){ .tabbar{ display:none; } }

  .share-toast{
    position:fixed; left:50%; bottom:96px; transform:translate(-50%,12px);
    background:var(--night); color:#F2EFE8; font-size:14px;
    padding:10px 18px; border-radius:999px; box-shadow:var(--s3);
    opacity:0; pointer-events:none; transition:opacity .22s ease-out, transform .22s ease-out; z-index:95;
  }
  .share-toast.show{ opacity:1; transform:translate(-50%,0); }
  .share-toast.ok{ background:#2F8F6B; }

/* roulang page: category1 */
:root{
    --spruce:#17594E;
    --spruce-dark:#0E3A33;
    --spruce-soft:#E8F1EE;
    --clay:#E0763A;
    --clay-light:#F2A15F;
    --celadon:#7FA99B;
    --paper:#F7F5F0;
    --night:#0E2A26;
    --card:#FFFFFF;
    --line:#E6E2D9;
    --ink:#16211E;
    --mut:#55605B;
    --faint:#8A948F;
    --ok:#2F8F6B;
    --warn:#D9534F;
    --r-card:16px;
    --r-img:14px;
    --r-btn:10px;
    --r-block:20px;
    --sh1:0 1px 2px rgba(14,42,38,.06);
    --sh2:0 8px 24px rgba(14,42,38,.08);
    --sh3:0 16px 36px rgba(14,42,38,.14);
  }

  *,*::before,*::after{ box-sizing:border-box; }

  html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    padding-bottom:76px;
  }

  @media (min-width:1024px){
    body{ padding-bottom:0; }
  }

  img{ display:block; max-width:100%; height:auto; }

  a{ color:inherit; text-decoration:none; }

  button{ font-family:inherit; }

  h1,h2,h3,h4{ margin:0; font-weight:700; color:var(--ink); }
  h2{ font-size:clamp(22px,3vw,32px); line-height:1.3; margin-top:2.2em; margin-bottom:.9em; }
  h3{ font-size:20px; line-height:1.4; font-weight:600; margin-top:1.6em; margin-bottom:.6em; }
  h4{ font-size:17px; line-height:1.5; font-weight:600; }
  p{ margin:0 0 1.15em; }
  p:last-child{ margin-bottom:0; }

  :focus-visible{
    outline:2px solid var(--spruce);
    outline-offset:2px;
    border-radius:6px;
  }

  .container-x{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:32px;
    padding-right:32px;
  }

  @media (max-width:1023px){
    .container-x{ padding-left:24px; padding-right:24px; }
  }
  @media (max-width:639px){
    .container-x{ padding-left:18px; padding-right:18px; }
  }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(247,245,240,.96);
    border-bottom:1px solid transparent;
    transition:box-shadow .2s ease-out, border-color .2s ease-out, background .2s ease-out;
  }
  .site-header.is-scrolled{
    background:#FFFFFF;
    border-bottom-color:var(--line);
    box-shadow:var(--sh1);
  }
  .nav-link{
    position:relative;
    font-size:15px;
    color:var(--mut);
    padding:6px 2px;
    transition:color .2s ease-out;
    white-space:nowrap;
  }
  .nav-link:hover{ color:var(--spruce); }
  .nav-link.active{ color:var(--spruce); font-weight:600; }
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:0; right:0; bottom:-6px;
    height:2px;
    border-radius:2px;
    background:var(--spruce);
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:11px 22px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    line-height:1.2;
    border:1.5px solid transparent;
    cursor:pointer;
    transition:transform .18s ease-out, background-color .18s ease-out, box-shadow .18s ease-out, border-color .18s ease-out, color .18s ease-out;
  }
  .btn-primary{
    background:var(--spruce);
    color:#FFFFFF;
    box-shadow:var(--sh1);
  }
  .btn-primary:hover{
    background:var(--spruce-dark);
    transform:translateY(-1px);
    box-shadow:var(--sh2);
  }
  .btn-ghost{
    background:#FFFFFF;
    color:var(--spruce);
    border-color:var(--spruce);
  }
  .btn-ghost:hover{
    background:var(--spruce-soft);
    transform:translateY(-1px);
  }
  .btn-clay{
    background:var(--clay);
    color:#FFFFFF;
  }
  .btn-clay:hover{
    background:#C9652F;
    transform:translateY(-1px);
  }
  .btn-text{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--spruce);
    font-weight:600;
    font-size:14px;
    text-decoration:underline;
    text-underline-offset:4px;
    transition:color .18s ease-out;
  }
  .btn-text:hover{ color:var(--clay); }
  .btn[disabled],.btn.is-disabled{
    filter:saturate(.6);
    opacity:.55;
    cursor:not-allowed;
    transform:none;
  }

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:999px;
    font-size:13px;
    font-weight:600;
    line-height:1.5;
    background:rgba(23,89,78,.08);
    color:var(--spruce);
    white-space:nowrap;
  }
  .badge-clay{
    background:rgba(224,118,58,.12);
    color:#A9521F;
  }
  .badge-soft{
    background:var(--spruce-soft);
    color:var(--spruce);
  }
  .tag{
    display:inline-flex;
    align-items:center;
    padding:6px 14px;
    border-radius:999px;
    border:1px solid var(--line);
    background:#FFFFFF;
    color:var(--mut);
    font-size:14px;
    transition:border-color .18s ease-out, color .18s ease-out, background .18s ease-out;
  }
  .tag:hover{ border-color:var(--spruce); color:var(--spruce); background:var(--spruce-soft); }

  /* ---------- Hero ---------- */
  .cat-hero{
    position:relative;
    overflow:hidden;
    background-color:var(--spruce-dark);
  }
  .cat-hero__bg{
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;
    background-position:center;
    opacity:.42;
  }
  .cat-hero__veil{
    position:absolute;
    inset:0;
    background:linear-gradient(100deg, rgba(14,58,51,.94) 0%, rgba(23,89,78,.86) 52%, rgba(14,42,38,.72) 100%);
  }
  .cat-hero__inner{ position:relative; z-index:2; }
  .cat-hero h1{
    color:#F7F5F0;
    font-size:clamp(26px,4vw,40px);
    line-height:1.28;
    font-weight:700;
    letter-spacing:-.01em;
    margin-bottom:16px;
  }
  .cat-hero p.lead{
    color:rgba(242,239,232,.86);
    font-size:16px;
    line-height:1.85;
    max-width:720px;
    margin-bottom:0;
  }
  .hero-points{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:0;
    margin:28px 0 0;
    padding:0;
    list-style:none;
    border-top:1px solid rgba(242,239,232,.18);
    padding-top:18px;
  }
  .hero-points li{
    padding:0 20px;
    border-left:1px solid rgba(242,239,232,.18);
    color:rgba(242,239,232,.9);
    font-size:14px;
    line-height:1.7;
  }
  .hero-points li:first-child{ padding-left:0; border-left:0; }
  .hero-points b{ display:block; color:#F2A15F; font-size:13px; letter-spacing:.06em; margin-bottom:4px; }
  @media (max-width:767px){
    .hero-points{ grid-template-columns:1fr; gap:14px; }
    .hero-points li{ padding:0; border-left:0; padding-left:12px; border-left:2px solid rgba(242,161,95,.5); }
  }

  .crumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:rgba(242,239,232,.72);
    margin-bottom:18px;
    flex-wrap:wrap;
  }
  .crumb a{ color:rgba(242,239,232,.72); }
  .crumb a:hover{ color:#F2A15F; }
  .crumb .sep{ opacity:.5; }
  .crumb .now{ color:#F2EFE8; font-weight:600; }

  /* ---------- 锚点目录 ---------- */
  .toc{
    background:#FFFFFF;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh1);
    padding:18px 16px;
  }
  .toc-title{
    font-size:13px;
    font-weight:700;
    letter-spacing:.1em;
    color:var(--faint);
    margin:0 0 12px 4px;
  }
  .toc-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:2px; }
  .toc-link{
    display:flex;
    align-items:center;
    gap:10px;
    padding:10px 10px 10px 12px;
    border-radius:10px;
    border-left:3px solid transparent;
    font-size:14px;
    color:var(--mut);
    transition:background .18s ease-out, border-color .18s ease-out, transform .18s ease-out, color .18s ease-out;
  }
  .toc-link:hover{
    background:var(--spruce-soft);
    border-left-color:var(--spruce);
    color:var(--spruce);
    transform:translateX(4px);
  }
  .toc-link.is-current{
    background:var(--spruce-soft);
    border-left-color:var(--spruce);
    color:var(--spruce);
    font-weight:600;
  }
  .toc-num{
    font-family:Inter,system-ui,sans-serif;
    font-variant-numeric:tabular-nums;
    font-size:12px;
    font-weight:700;
    color:var(--clay);
    min-width:20px;
  }
  @media (max-width:1023px){
    .toc{ padding:14px; }
    .toc-list{
      flex-direction:row;
      overflow-x:auto;
      gap:10px;
      scroll-snap-type:x mandatory;
      padding-bottom:4px;
    }
    .toc-list li{ scroll-snap-align:start; flex:0 0 auto; }
    .toc-link{
      border:1px solid var(--line);
      border-left:1px solid var(--line);
      border-radius:999px;
      padding:9px 16px;
      background:#FFFFFF;
      white-space:nowrap;
    }
    .toc-link:hover{ transform:none; }
  }

  /* ---------- 分组卡片 ---------- */
  .group-block{ margin-bottom:44px; }
  .group-block:last-child{ margin-bottom:0; }
  .group-head{
    display:flex;
    align-items:flex-start;
    gap:14px;
    margin-bottom:18px;
  }
  .group-index{
    flex:0 0 auto;
    width:38px; height:38px;
    border-radius:12px;
    background:var(--spruce);
    color:#F2EFE8;
    display:grid;
    place-items:center;
    font-family:Inter,system-ui,sans-serif;
    font-variant-numeric:tabular-nums;
    font-size:14px;
    font-weight:700;
  }
  .group-head h3{ margin:0 0 4px; }
  .group-head p{ margin:0; font-size:14px; color:var(--mut); line-height:1.75; }

  .item-card{
    display:block;
    background:#FFFFFF;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh1);
    padding:18px 18px 16px;
    height:100%;
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .item-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--sh3);
    border-color:rgba(23,89,78,.3);
  }
  .item-card h4{ margin:0 0 8px; }
  .item-card p{ font-size:14px; line-height:1.8; color:var(--mut); margin:0 0 12px; }
  .item-card .meta{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    border-top:1px solid var(--line);
    padding-top:10px;
    font-size:13px;
    color:var(--faint);
  }
  .item-icon{
    width:34px; height:34px;
    border-radius:10px;
    background:var(--spruce-soft);
    color:var(--spruce);
    display:grid;
    place-items:center;
    font-size:15px;
    margin-bottom:12px;
  }

  /* ---------- 步骤流程 ---------- */
  .flow{
    background:#FFFFFF;
    border:1px solid var(--line);
    border-radius:var(--r-block);
    box-shadow:var(--sh1);
    padding:32px 28px;
  }
  .flow-grid{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:22px;
    margin-top:24px;
  }
  .flow-item{ position:relative; padding-top:20px; }
  .flow-item::before{
    content:"";
    position:absolute;
    top:7px; left:0; right:-22px;
    height:2px;
    background:linear-gradient(90deg, rgba(23,89,78,.35), rgba(127,169,155,.18));
  }
  .flow-item:last-child::before{ right:0; }
  .flow-dot{
    position:absolute;
    top:0; left:0;
    width:16px; height:16px;
    border-radius:999px;
    background:#FFFFFF;
    border:3px solid var(--clay);
  }
  .flow-item h4{ font-size:16px; margin:14px 0 6px; }
  .flow-item p{ font-size:14px; line-height:1.78; color:var(--mut); margin:0; }
  @media (max-width:1023px){
    .flow-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
    .flow-item::before{ right:-22px; }
    .flow-item:nth-child(2n)::before{ right:0; }
  }
  @media (max-width:639px){
    .flow{ padding:22px 18px; }
    .flow-grid{ grid-template-columns:1fr; gap:18px; }
    .flow-item::before{ right:0; }
  }

  /* ---------- 准备清单 ---------- */
  .check-list{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; }
  .check-list li{
    display:flex;
    gap:12px;
    align-items:flex-start;
    background:#FFFFFF;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:16px 18px;
    box-shadow:var(--sh1);
    font-size:15px;
    line-height:1.8;
    color:var(--mut);
  }
  .check-list i{ color:var(--ok); margin-top:5px; font-size:15px; }
  @media (max-width:767px){
    .check-list{ grid-template-columns:1fr; }
  }

  /* ---------- FAQ ---------- */
  .faq-wrap{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:0 40px;
    border-top:1px solid var(--line);
  }
  .faq-item{
    border-bottom:1px solid var(--line);
    border-left:3px solid transparent;
    padding:4px 0 4px 0;
    transition:border-color .2s ease-out, background .2s ease-out;
  }
  .faq-item.open{
    border-left-color:var(--spruce);
    background:rgba(255,255,255,.6);
  }
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    text-align:left;
    background:transparent;
    border:0;
    padding:16px 12px;
    font-size:17px;
    font-weight:600;
    color:var(--ink);
    cursor:pointer;
  }
  .faq-q i{
    flex:0 0 auto;
    color:var(--spruce);
    font-size:14px;
    transition:transform .25s ease-out;
  }
  .faq-item.open .faq-q i{ transform:rotate(45deg); color:var(--clay); }
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s ease-out;
  }
  .faq-a p{
    padding:0 12px 18px;
    font-size:15px;
    line-height:1.8;
    color:var(--mut);
    margin:0;
  }
  @media (max-width:767px){
    .faq-wrap{ grid-template-columns:1fr; gap:0; }
  }

  /* ---------- 相关分类 ---------- */
  .rel-card{
    display:block;
    background:#FFFFFF;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:var(--sh1);
    height:100%;
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .rel-card:hover{ transform:translateY(-2px); box-shadow:var(--sh3); border-color:rgba(23,89,78,.3); }
  .rel-card .thumb{ overflow:hidden; aspect-ratio:16/10; background:var(--spruce-soft); }
  .rel-card .thumb img{
    width:100%; height:100%; object-fit:cover;
    transition:transform .35s ease-out;
  }
  .rel-card:hover .thumb img{ transform:scale(1.04); }
  .rel-card .body{ padding:16px 18px 18px; }
  .rel-card h4{ font-size:16px; margin:0 0 8px; }
  .rel-card p{ font-size:14px; color:var(--mut); line-height:1.78; margin:0; }

  /* ---------- 收藏 / 分享 CTA ---------- */
  .cta-band{
    background:var(--night);
    border-radius:var(--r-block);
    color:#F2EFE8;
    padding:34px 32px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:26px;
    flex-wrap:wrap;
  }
  .cta-band h2{ color:#F2EFE8; margin:0 0 8px; font-size:clamp(20px,2.4vw,26px); }
  .cta-band p{ color:rgba(242,239,232,.75); font-size:15px; margin:0; max-width:620px; line-height:1.8; }
  .icon-btn{
    width:44px; height:44px;
    display:grid;
    place-items:center;
    border-radius:var(--r-btn);
    border:1.5px solid rgba(242,239,232,.35);
    background:transparent;
    color:#F2EFE8;
    cursor:pointer;
    transition:background .18s ease-out, border-color .18s ease-out, transform .18s ease-out;
  }
  .icon-btn:hover{ background:rgba(242,239,232,.12); border-color:#F2EFE8; transform:translateY(-1px); }
  .copy-tip{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:13px;
    color:var(--ok);
    opacity:0;
    transition:opacity .2s ease-out;
  }
  .copy-tip.show{ opacity:1; }

  /* ---------- 页脚 ---------- */
  .foot-link{
    color:rgba(242,239,232,.72);
    font-size:14px;
    line-height:1.9;
    text-decoration:underline;
    text-decoration-color:transparent;
    text-underline-offset:3px;
    transition:color .18s ease-out, text-decoration-color .18s ease-out;
    width:fit-content;
  }
  .foot-link:hover{
    color:var(--clay-light);
    text-decoration-color:var(--clay-light);
  }

  /* ---------- 移动端底部 Tab ---------- */
  .mobile-tab{
    position:fixed;
    left:0; right:0; bottom:0;
    z-index:70;
    display:flex;
    background:#FFFFFF;
    border-top:1px solid var(--line);
    box-shadow:0 -6px 18px rgba(14,42,38,.07);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobile-tab a{
    flex:1 1 0;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    min-height:60px;
    font-size:11px;
    color:var(--faint);
    padding:8px 2px;
    transition:color .18s ease-out;
  }
  .mobile-tab a i{ font-size:19px; }
  .mobile-tab a.active{ color:var(--spruce); font-weight:600; }
  .mobile-tab a.active i{ color:var(--clay); }
  @media (min-width:1024px){
    .mobile-tab{ display:none; }
  }

  /* ---------- 抽屉 ---------- */
  .drawer-mask{
    position:fixed;
    inset:0;
    background:rgba(14,42,38,.5);
    opacity:0;
    pointer-events:none;
    transition:opacity .25s ease-out;
    z-index:80;
  }
  .drawer-mask.show{ opacity:1; pointer-events:auto; }
  .drawer{
    position:fixed;
    top:0; right:0;
    width:min(320px,86vw);
    height:100%;
    background:#FFFFFF;
    z-index:90;
    transform:translateX(104%);
    transition:transform .3s ease-out;
    display:flex;
    flex-direction:column;
    padding:20px 20px calc(20px + env(safe-area-inset-bottom));
    overflow-y:auto;
  }
  .drawer.show{ transform:translateX(0); }
  .drawer a.drawer-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:14px 4px;
    border-bottom:1px solid var(--line);
    font-size:16px;
    color:var(--mut);
    min-height:52px;
  }
  .drawer a.drawer-link.active{ color:var(--spruce); font-weight:600; }

  .section-pad{ padding-top:88px; }
  @media (max-width:1023px){ .section-pad{ padding-top:64px; } }
  @media (max-width:639px){ .section-pad{ padding-top:48px; } }

  .sec-alt{ background:#FFFFFF; }

  [id]{ scroll-margin-top:92px; }

  .reveal{ opacity:1; }

/* roulang page: category2 */
:root{
  --spruce:#17594E; --spruce-deep:#0E3A33; --spruce-soft:#E8F1EE;
  --clay:#E0763A; --clay-light:#F2A15F; --celadon:#7FA99B;
  --paper:#F7F5F0; --night:#0E2A26; --card:#FFFFFF; --linec:#E6E2D9;
  --ink:#16211E; --sub:#55605B; --weak:#8A948F; --ok:#2F8F6B; --warn:#D9534F;
  --r-card:16px; --r-img:14px; --r-btn:10px; --r-badge:999px; --r-block:20px;
  --s1:0 1px 2px rgba(14,42,38,.06);
  --s2:0 8px 24px rgba(14,42,38,.08);
  --s3:0 16px 36px rgba(14,42,38,.14);
  --sec:88px;
}
@media (max-width:1023px){ :root{ --sec:64px; } }
@media (max-width:639px){ :root{ --sec:48px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px; line-height:1.85; letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
@media (max-width:1023px){
  body{ padding-bottom:calc(76px + env(safe-area-inset-bottom)); }
}
img{ max-width:100%; display:block; }
a{ color:var(--spruce); text-decoration:none; transition:color .2s ease-out, opacity .2s ease-out; }
a:hover{ color:var(--clay); }
button{ font:inherit; cursor:pointer; }
h1,h2,h3,h4{ font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif; color:var(--ink); letter-spacing:-.01em; }
h1{ font-size:clamp(28px,4.4vw,44px); line-height:1.25; font-weight:700; margin:0 0 18px; }
h2{ font-size:clamp(22px,3vw,32px); line-height:1.3; font-weight:700; margin:0 0 .9em; }
h3{ font-size:20px; line-height:1.4; font-weight:600; margin:1.6em 0 .6em; }
h4{ font-size:17px; line-height:1.5; font-weight:600; }
p{ margin:0 0 1.15em; }
ol,ul{ margin:0; padding:0; list-style:none; }
:focus-visible{ outline:2px solid var(--spruce); outline-offset:2px; border-radius:4px; }
.num{ font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; }

.container-x{
  width:100%; max-width:1200px; margin:0 auto;
  padding-left:32px; padding-right:32px;
}
@media (max-width:1023px){ .container-x{ padding-left:24px; padding-right:24px; } }
@media (max-width:639px){ .container-x{ padding-left:18px; padding-right:18px; } }

.section{ padding-top:var(--sec); padding-bottom:var(--sec); }
.section-tight{ padding-top:calc(var(--sec) * .6); padding-bottom:calc(var(--sec) * .6); }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(247,245,240,.86);
  border-bottom:1px solid transparent;
  transition:background .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--linec);
  box-shadow:0 1px 2px rgba(14,42,38,.06);
}
.nav-link{
  position:relative; font-size:15px; font-weight:500; color:var(--sub);
  padding:6px 0; transition:color .2s ease-out;
}
.nav-link::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:2px;
  background:var(--clay); transition:right .22s ease-out; border-radius:2px;
}
.nav-link:hover{ color:var(--spruce); }
.nav-link:hover::after{ right:0; }
.nav-link.active{ color:var(--spruce); font-weight:600; }
.nav-link.active::after{ right:0; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:44px; padding:0 20px; border-radius:var(--r-btn);
  font-size:15px; font-weight:600; line-height:1;
  border:1.5px solid transparent; transition:all .2s ease-out; white-space:nowrap;
}
.btn-primary{ background:var(--spruce); color:#fff; box-shadow:var(--s1); }
.btn-primary:hover{ background:var(--spruce-deep); color:#fff; transform:translateY(-1px); box-shadow:var(--s2); }
.btn-ghost{ background:#fff; color:var(--spruce); border-color:var(--spruce); }
.btn-ghost:hover{ background:var(--spruce-soft); color:var(--spruce-deep); transform:translateY(-1px); }
.btn-quiet{ background:transparent; color:var(--spruce); padding:0; min-height:auto; text-decoration:underline; text-underline-offset:4px; }
.btn-quiet:hover{ color:var(--clay); }
.btn[disabled], .btn.is-disabled{ opacity:.55; }

.badge{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 12px; border-radius:var(--r-badge);
  font-size:13px; font-weight:600; line-height:1.5;
  background:rgba(23,89,78,.08); color:var(--spruce);
}
.badge-clay{ background:rgba(224,118,58,.12); color:#B4551F; }

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  min-height:520px; display:flex; align-items:center;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover; background-position:center;
}
.hero::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(100deg, rgba(23,89,78,.94) 0%, rgba(23,89,78,.86) 48%, rgba(14,42,38,.72) 100%);
}
.hero-inner{ position:relative; z-index:2; color:#F2EFE8; padding-top:72px; padding-bottom:72px; }
.hero-inner h1{ color:#fff; max-width:860px; }
.hero-sub{ font-size:17px; line-height:1.85; color:rgba(242,239,232,.86); max-width:660px; margin-bottom:26px; }
.hero-points{
  display:flex; flex-wrap:wrap; gap:0; margin-top:38px;
  border-top:1px solid rgba(242,239,232,.2); padding-top:22px;
}
.hero-point{ flex:1 1 200px; padding-right:24px; margin-right:24px; border-right:1px solid rgba(242,239,232,.2); }
.hero-point:last-child{ border-right:0; margin-right:0; padding-right:0; }
.hero-point b{ display:block; font-size:15px; font-weight:600; color:#fff; margin-bottom:2px; }
.hero-point span{ font-size:13.5px; color:rgba(242,239,232,.72); }
@media (max-width:767px){
  .hero{ min-height:420px; }
  .hero-inner{ padding-top:48px; padding-bottom:48px; }
  .hero-point{ flex:1 1 100%; border-right:0; border-bottom:1px solid rgba(242,239,232,.16); padding:12px 0; margin:0; }
  .hero-point:last-child{ border-bottom:0; }
}
.crumbs{ font-size:13px; color:rgba(242,239,232,.7); margin-bottom:20px; display:flex; flex-wrap:wrap; gap:6px; align-items:center; }
.crumbs a{ color:rgba(242,239,232,.86); }
.crumbs a:hover{ color:var(--clay-light); }
.crumbs .sep{ opacity:.5; }
.crumbs .current{ color:rgba(242,239,232,.55); }

/* ---------- Cards ---------- */
.card{
  background:var(--card); border:1px solid var(--linec); border-radius:var(--r-card);
  box-shadow:var(--s1); transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
}
.card-hover:hover{ transform:translateY(-2px); box-shadow:var(--s3); border-color:rgba(23,89,78,.3); }
.card-img{ aspect-ratio:16/10; overflow:hidden; border-radius:var(--r-img); }
.card-img img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease-out; }
.card-hover:hover .card-img img{ transform:scale(1.04); }

.eyebrow{ font-size:13px; font-weight:600; letter-spacing:.14em; color:var(--clay); text-transform:uppercase; margin-bottom:10px; }
.lead{ font-size:16.5px; color:var(--sub); max-width:760px; }

/* ---------- Timeline ---------- */
.timeline{ position:relative; margin-top:10px; }
.tl-item{ position:relative; padding-left:84px; padding-bottom:34px; }
.tl-item::before{
  content:""; position:absolute; left:26px; top:56px; bottom:-6px; width:2px;
  background:linear-gradient(180deg, rgba(127,169,155,.55), rgba(127,169,155,.15));
}
.tl-item:last-child{ padding-bottom:0; }
.tl-item:last-child::before{ display:none; }
.tl-node{
  position:absolute; left:0; top:0; width:54px; height:54px; border-radius:50%;
  display:grid; place-items:center; background:#fff; border:2px solid var(--clay);
  color:var(--spruce); font-weight:700; font-size:16px; font-family:Inter,system-ui,sans-serif;
  font-variant-numeric:tabular-nums; box-shadow:var(--s1); z-index:2;
}
.tl-card{
  background:#fff; border:1px solid var(--linec); border-radius:var(--r-card);
  padding:24px 26px; box-shadow:var(--s1);
  transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
}
.tl-card:hover{ transform:translateY(-2px); box-shadow:var(--s3); border-color:rgba(23,89,78,.28); }
.tl-card h3{ margin:0 0 8px; font-size:19px; }
.tl-card p{ margin:0; color:var(--sub); font-size:15.5px; }
.tl-tag{ font-size:13px; color:var(--celadon); font-weight:600; margin-bottom:6px; display:block; }
@media (max-width:639px){
  .tl-item{ padding-left:62px; padding-bottom:26px; }
  .tl-item::before{ left:20px; top:46px; }
  .tl-node{ width:42px; height:42px; font-size:14px; }
  .tl-card{ padding:18px 18px; }
}

/* ---------- Dark band ---------- */
.band{
  position:relative; overflow:hidden; background:var(--night); color:#F2EFE8;
  border-radius:var(--r-block);
}
.band::before{
  content:""; position:absolute; inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover; background-position:center; opacity:.22;
}
.band > *{ position:relative; z-index:2; }
.stat{ padding:20px 0; border-top:1px solid rgba(242,239,232,.16); }
.stat b{ display:block; font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; font-size:clamp(30px,4vw,42px); line-height:1.1; color:#fff; font-weight:700; }
.stat span{ font-size:14px; color:rgba(242,239,232,.7); }

/* ---------- List blocks ---------- */
.tip{
  background:#fff; border:1px solid var(--linec); border-left:3px solid var(--celadon);
  border-radius:12px; padding:18px 20px; transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.tip:hover{ border-left-color:var(--clay); box-shadow:var(--s2); }
.tip h4{ margin:0 0 6px; display:flex; align-items:center; gap:8px; }
.tip p{ margin:0; font-size:14.5px; color:var(--sub); line-height:1.8; }
.tip i{ color:var(--celadon); }

.link-card{
  display:block; background:#fff; border:1px solid var(--linec); border-radius:var(--r-card);
  padding:22px; box-shadow:var(--s1); transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
}
.link-card:hover{ transform:translateY(-2px); box-shadow:var(--s3); border-color:rgba(23,89,78,.3); }
.link-card h4{ margin:0 0 8px; color:var(--ink); }
.link-card p{ margin:0 0 14px; font-size:14.5px; color:var(--sub); }
.link-card .go{ font-size:14px; font-weight:600; color:var(--spruce); }
.link-card:hover .go{ color:var(--clay); }

/* ---------- FAQ ---------- */
.faq-item{
  background:#fff; border:1px solid var(--linec); border-radius:12px;
  padding:0; margin-bottom:12px; overflow:hidden;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.faq-item[open]{ border-left:3px solid var(--spruce); box-shadow:var(--s2); }
.faq-item summary{
  list-style:none; cursor:pointer; padding:18px 22px;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  font-size:17px; font-weight:600; color:var(--ink);
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary .plus{
  flex:0 0 auto; width:24px; height:24px; display:grid; place-items:center;
  color:var(--spruce); transition:transform .22s ease-out;
}
.faq-item[open] summary .plus{ transform:rotate(45deg); color:var(--clay); }
.faq-body{ padding:0 22px 20px; font-size:15px; line-height:1.85; color:var(--sub); }

/* ---------- Footer ---------- */
.foot-link{ color:rgba(242,239,232,.78); font-size:14px; line-height:1.9; text-decoration:none; }
.foot-link:hover{ color:var(--clay-light); text-decoration:underline; text-underline-offset:3px; }

/* ---------- Mobile tab bar & drawer ---------- */
.tabbar{
  position:fixed; left:0; right:0; bottom:0; z-index:60;
  background:rgba(255,255,255,.98); border-top:1px solid var(--linec);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 18px rgba(14,42,38,.06);
}
.tabbar-inner{ display:grid; grid-template-columns:repeat(5,1fr); }
.tab{
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px;
  padding:9px 2px 8px; color:var(--weak); font-size:11px; line-height:1.2; min-height:56px;
}
.tab i{ font-size:17px; }
.tab.active{ color:var(--spruce); font-weight:600; }
.tab.active i{ color:var(--clay); }

.drawer{
  position:fixed; inset:0; z-index:70; display:none;
}
.drawer.open{ display:block; }
.drawer-mask{ position:absolute; inset:0; background:rgba(14,42,38,.5); opacity:0; transition:opacity .24s ease-out; }
.drawer.open .drawer-mask{ opacity:1; }
.drawer-panel{
  position:absolute; top:0; right:0; height:100%; width:82%; max-width:340px;
  background:#fff; padding:22px 22px 32px; transform:translateX(100%);
  transition:transform .26s ease-out; box-shadow:var(--s3); overflow-y:auto;
}
.drawer.open .drawer-panel{ transform:translateX(0); }
.drawer-link{
  display:block; padding:14px 12px; border-radius:10px; font-size:16px; font-weight:500;
  color:var(--ink); border-bottom:1px solid var(--linec);
}
.drawer-link:hover{ background:var(--spruce-soft); color:var(--spruce-deep); }
.drawer-link.active{ color:var(--spruce); font-weight:700; background:var(--spruce-soft); }

.toast{
  position:fixed; left:50%; bottom:96px; transform:translate(-50%,12px);
  background:var(--ok); color:#fff; font-size:14px; padding:10px 18px; border-radius:999px;
  box-shadow:var(--s3); opacity:0; pointer-events:none; transition:opacity .22s ease-out, transform .22s ease-out; z-index:80;
}
.toast.show{ opacity:1; transform:translate(-50%,0); }

/* roulang page: category3 */
:root{
    --spruce:#17594E; --spruce-deep:#0E3A33; --spruce-soft:#E8F1EE;
    --sand:#E0763A; --sand-light:#F2A15F; --celadon:#7FA99B;
    --paper:#F7F5F0; --night:#0E2A26; --card:#FFFFFF; --line:#E6E2D9;
    --ink:#16211E; --ink-2:#55605B; --ink-3:#8A948F;
    --ok:#2F8F6B; --warn:#D9534F;
    --r-card:16px; --r-img:14px; --r-btn:10px; --r-badge:999px; --r-big:20px;
    --sh-1:0 1px 2px rgba(14,42,38,.06);
    --sh-2:0 8px 24px rgba(14,42,38,.08);
    --sh-3:0 16px 36px rgba(14,42,38,.14);
    --sec:88px;
  }
  @media (max-width:1023px){ :root{ --sec:64px; } }
  @media (max-width:767px){ :root{ --sec:48px; } }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--ink);
    background:var(--paper);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  @media (max-width:1023px){ body{ padding-bottom:76px; } }
  img{ display:block; max-width:100%; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; cursor:pointer; }
  h1,h2,h3,h4,p{ margin:0; }
  ul{ margin:0; }

  .container-x{ width:100%; max-width:1200px; margin:0 auto; padding:0 32px; }
  @media (max-width:1023px){ .container-x{ padding:0 24px; } }
  @media (max-width:639px){ .container-x{ padding:0 18px; } }

  .num{ font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums; }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky; top:0; z-index:50;
    background:rgba(247,245,240,.88);
    border-bottom:1px solid transparent;
    transition:background .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
  }
  .site-header.is-scrolled{
    background:#fff;
    border-bottom-color:var(--line);
    box-shadow:var(--sh-1);
  }
  .nav-link{
    position:relative;
    font-size:15px;
    font-weight:500;
    color:var(--ink-2);
    padding:8px 0;
    transition:color .18s ease-out;
    white-space:nowrap;
  }
  .nav-link:hover{ color:var(--spruce); }
  .nav-link.active{ color:var(--spruce); font-weight:600; }
  .nav-link.active::after{
    content:""; position:absolute; left:0; right:0; bottom:0; height:2px;
    border-radius:2px; background:var(--sand);
  }
  .nav-link:focus-visible,
  .btn:focus-visible,
  .tab-item:focus-visible,
  .faq-q:focus-visible,
  .card-link:focus-visible{
    outline:2px solid var(--spruce); outline-offset:2px; border-radius:6px;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    height:48px; padding:0 22px; min-width:44px;
    border-radius:var(--r-btn); border:1.5px solid transparent;
    font-size:15px; font-weight:600; line-height:1;
    transition:background .2s ease-out, color .2s ease-out, border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
  }
  .btn-primary{ background:var(--spruce); color:#fff; box-shadow:var(--sh-1); }
  .btn-primary:hover{ background:var(--spruce-deep); transform:translateY(-1px); box-shadow:var(--sh-2); }
  .btn-primary:active{ transform:translateY(0); }
  .btn-ghost{ background:#fff; color:var(--spruce); border-color:rgba(23,89,78,.36); }
  .btn-ghost:hover{ border-color:var(--spruce); background:var(--spruce-soft); transform:translateY(-1px); }
  .btn-sand{ background:var(--sand); color:#fff; box-shadow:var(--sh-1); }
  .btn-sand:hover{ background:#c9642c; transform:translateY(-1px); box-shadow:var(--sh-2); }
  .btn-sm{ height:44px; padding:0 18px; font-size:14px; }

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex; align-items:center; gap:6px;
    font-size:13px; font-weight:600; line-height:1.5;
    color:var(--spruce); background:rgba(23,89,78,.08);
    border-radius:var(--r-badge); padding:5px 12px;
  }
  .badge-sand{ color:#a8501c; background:rgba(224,118,58,.14); }
  .badge-light{ color:#F2EFE8; background:rgba(242,239,232,.14); }
  .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:13px; font-weight:600; letter-spacing:.08em;
    color:var(--spruce); background:var(--spruce-soft);
    border-radius:var(--r-badge); padding:6px 14px; margin-bottom:14px;
  }

  /* ---------- 板块 ---------- */
  .section{ padding-block:var(--sec); }
  .section-alt{ background:#fff; }
  .section-dark{ background:var(--night); color:#F2EFE8; }
  .section-head{ max-width:780px; margin-bottom:40px; }
  @media (max-width:767px){ .section-head{ margin-bottom:28px; } }
  .section-head h2{
    font-size:clamp(22px,3vw,32px); line-height:1.3; font-weight:700; margin-bottom:14px;
  }
  .section-head p{ color:var(--ink-2); }
  .section-dark .section-head p{ color:rgba(242,239,232,.75); }
  .section-dark .eyebrow{ color:#F2EFE8; background:rgba(242,239,232,.12); }

  /* ---------- Hero ---------- */
  .hero{ position:relative; overflow:hidden; background:var(--night); }
  .hero-bg{
    position:absolute; inset:0;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover; background-position:center;
  }
  .hero-bg::after{
    content:""; position:absolute; inset:0;
    background:linear-gradient(100deg, rgba(14,42,38,.95) 0%, rgba(23,89,78,.88) 56%, rgba(14,42,38,.74) 100%);
  }
  .hero-inner{ position:relative; z-index:2; padding:44px 0 52px; }
  @media (min-width:1024px){ .hero-inner{ padding:64px 0 72px; } }
  .hero h1{
    color:#F7F5F0;
    font-size:clamp(28px,4.4vw,44px);
    line-height:1.25; font-weight:700;
    letter-spacing:-.01em;
    max-width:820px;
  }
  .hero-sub{
    color:rgba(242,239,232,.82);
    font-size:17px; line-height:1.85;
    max-width:660px; margin-top:18px;
  }
  .hero-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:30px; }
  .hero-points{
    list-style:none; padding:0; margin:38px 0 0;
    display:grid; grid-template-columns:1fr; gap:16px;
  }
  @media (min-width:768px){
    .hero-points{ grid-template-columns:repeat(3,1fr); gap:0; }
    .hero-points li{ padding:0 24px; }
    .hero-points li:first-child{ padding-left:0; }
    .hero-points li + li{ border-left:1px solid rgba(242,239,232,.22); }
  }
  .hero-points li{ font-size:14px; line-height:1.75; color:rgba(242,239,232,.78); }
  .hero-points strong{ display:block; color:#F7F5F0; font-size:15px; margin-bottom:4px; font-weight:600; }

  /* ---------- 面包屑 ---------- */
  .breadcrumb{
    display:flex; flex-wrap:wrap; align-items:center; gap:8px;
    font-size:13px; color:rgba(242,239,232,.66); margin-bottom:22px;
  }
  .breadcrumb a{ color:rgba(242,239,232,.82); transition:color .18s ease-out; }
  .breadcrumb a:hover{ color:var(--sand-light); text-decoration:underline; text-underline-offset:3px; }
  .breadcrumb .sep{ opacity:.5; }
  .breadcrumb .current{ color:rgba(242,239,232,.6); }

  /* ---------- 图文对照 ---------- */
  .cmp-row{
    display:grid; grid-template-columns:1fr; gap:26px; align-items:center;
    background:#fff; border:1px solid var(--line); border-radius:var(--r-big);
    padding:22px; box-shadow:var(--sh-1);
    transition:box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .cmp-row:hover{ box-shadow:var(--sh-2); border-color:rgba(23,89,78,.22); }
  .cmp-row + .cmp-row{ margin-top:24px; }
  @media (min-width:1024px){
    .cmp-row{ grid-template-columns:1.05fr .95fr; gap:48px; padding:38px; }
    .cmp-row.reverse .cmp-media{ order:-1; }
  }
  .cmp-text h3{
    font-size:20px; line-height:1.4; font-weight:600; margin:14px 0 12px;
  }
  .cmp-text p{ color:var(--ink-2); font-size:15.5px; }
  .cmp-text p + p{ margin-top:12px; }
  .cmp-media img{
    width:100%; aspect-ratio:16/10; object-fit:cover;
    border-radius:var(--r-img);
  }
  .cmp-media figcaption{
    font-size:13px; color:var(--ink-3); text-align:center; margin-top:10px;
  }

  .ticks{ list-style:none; padding:0; margin:18px 0 0; display:flex; flex-direction:column; gap:10px; }
  .ticks li{
    position:relative; padding-left:26px;
    font-size:15px; line-height:1.75; color:var(--ink-2);
  }
  .ticks li::before{
    content:""; position:absolute; left:0; top:9px;
    width:12px; height:12px; border-radius:4px;
    background:rgba(224,118,58,.16); border:1.5px solid var(--sand);
  }

  /* ---------- 场景卡 ---------- */
  .grid-scenes{
    display:grid; grid-template-columns:1fr; gap:20px;
  }
  @media (min-width:768px){ .grid-scenes{ grid-template-columns:repeat(2,1fr); } }
  .scene-card{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
    padding:26px; box-shadow:var(--sh-1);
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .scene-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); border-color:rgba(23,89,78,.3); }
  .scene-icon{
    width:44px; height:44px; border-radius:12px; display:grid; place-items:center;
    background:var(--spruce-soft); color:var(--spruce); font-size:19px; margin-bottom:16px;
  }
  .scene-card h3{ font-size:17px; font-weight:600; line-height:1.5; margin-bottom:10px; }
  .scene-card p{ font-size:15px; color:var(--ink-2); }

  /* ---------- 流程 ---------- */
  .grid-steps{ display:grid; grid-template-columns:1fr; gap:20px; counter-reset:stepc; }
  @media (min-width:640px){ .grid-steps{ grid-template-columns:repeat(2,1fr); } }
  @media (min-width:1024px){ .grid-steps{ grid-template-columns:repeat(4,1fr); } }
  .step-card{
    position:relative; background:#fff; border:1px solid var(--line);
    border-radius:var(--r-card); padding:26px 22px; box-shadow:var(--sh-1);
    transition:transform .2s ease-out, box-shadow .2s ease-out;
  }
  .step-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); }
  .step-num{
    width:38px; height:38px; border-radius:12px; display:grid; place-items:center;
    background:var(--spruce); color:#fff; font-weight:700; font-size:15px;
    font-family:Inter,system-ui,sans-serif; margin-bottom:16px;
  }
  .step-card h3{ font-size:17px; font-weight:600; margin-bottom:10px; }
  .step-card p{ font-size:14.5px; color:var(--ink-2); line-height:1.8; }
  .step-line{ display:none; }
  @media (min-width:1024px){
    .step-card::after{
      content:""; position:absolute; top:45px; right:-14px; width:28px; height:2px;
      background:linear-gradient(90deg, rgba(224,118,58,.5), rgba(224,118,58,.12));
    }
    .step-card:last-child::after{ display:none; }
  }

  /* ---------- 深色数据带 ---------- */
  .band-dark{
    background:var(--night); color:#F2EFE8;
    border-radius:var(--r-big); padding:40px 32px;
    position:relative; overflow:hidden;
  }
  .band-dark::before{
    content:""; position:absolute; right:-60px; top:-60px; width:220px; height:220px;
    border-radius:50%; background:rgba(224,118,58,.16); filter:blur(10px);
  }
  .band-inner{ position:relative; z-index:2; }
  .band-dark h2{ font-size:clamp(21px,2.8vw,28px); line-height:1.35; font-weight:700; margin-bottom:12px; }
  .band-dark .lead{ color:rgba(242,239,232,.76); max-width:640px; }
  .stat-grid{
    display:grid; grid-template-columns:repeat(2,1fr); gap:24px;
    margin-top:34px; padding-top:30px; border-top:1px solid rgba(242,239,232,.16);
  }
  @media (min-width:1024px){ .stat-grid{ grid-template-columns:repeat(4,1fr); } }
  .stat-num{
    font-family:Inter,system-ui,sans-serif; font-variant-numeric:tabular-nums;
    font-size:clamp(26px,4vw,38px); font-weight:700; color:var(--sand-light); line-height:1.1;
  }
  .stat-label{ font-size:14px; color:rgba(242,239,232,.72); margin-top:8px; }
  .check-list{ list-style:none; padding:0; margin:30px 0 0; display:grid; gap:12px; }
  @media (min-width:768px){ .check-list{ grid-template-columns:repeat(2,1fr); gap:12px 32px; } }
  .check-list li{
    position:relative; padding-left:28px; font-size:15px;
    color:rgba(242,239,232,.82); line-height:1.75;
  }
  .check-list li::before{
    content:"\f00c"; font-family:"Font Awesome 6 Free"; font-weight:900;
    position:absolute; left:0; top:2px; font-size:13px; color:var(--sand-light);
  }

  /* ---------- FAQ ---------- */
  .faq-grid{ display:grid; grid-template-columns:1fr; gap:0 48px; }
  @media (min-width:1024px){ .faq-grid{ grid-template-columns:repeat(2,1fr); } }
  .faq-item{ position:relative; border-bottom:1px solid var(--line); }
  .faq-item.open::before{
    content:""; position:absolute; left:-14px; top:22px; bottom:22px;
    width:3px; border-radius:3px; background:var(--spruce);
  }
  @media (max-width:1023px){ .faq-item.open::before{ left:-10px; } }
  .faq-q{
    width:100%; display:flex; align-items:flex-start; justify-content:space-between; gap:16px;
    background:none; border:0; padding:20px 0; text-align:left;
    font-size:17px; font-weight:600; color:var(--ink); line-height:1.55;
    transition:color .18s ease-out;
  }
  .faq-q:hover{ color:var(--spruce); }
  .faq-item.open .faq-q{ color:var(--spruce); }
  .faq-icon{ position:relative; flex:0 0 auto; width:20px; height:20px; margin-top:5px; transition:transform .24s ease-out; }
  .faq-icon::before,
  .faq-icon::after{
    content:""; position:absolute; background:currentColor; border-radius:2px;
  }
  .faq-icon::before{ left:0; right:0; top:9px; height:2px; }
  .faq-icon::after{ top:0; bottom:0; left:9px; width:2px; }
  .faq-item.open .faq-icon{ transform:rotate(45deg); }
  .faq-a{ max-height:0; overflow:hidden; transition:max-height .3s ease-out; }
  .faq-a p{ margin:0 0 20px; font-size:15px; line-height:1.8; color:var(--ink-2); }

  /* ---------- 相关分类 ---------- */
  .grid-related{ display:grid; grid-template-columns:1fr; gap:22px; }
  @media (min-width:768px){ .grid-related{ grid-template-columns:repeat(3,1fr); } }
  .rel-card{
    display:block; background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
    overflow:hidden; box-shadow:var(--sh-1);
    transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .rel-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); border-color:rgba(23,89,78,.3); }
  .rel-media{ overflow:hidden; }
  .rel-media img{ width:100%; aspect-ratio:16/10; object-fit:cover; transition:transform .35s ease-out; }
  .rel-card:hover .rel-media img{ transform:scale(1.04); }
  .rel-body{ padding:22px; }
  .rel-body h3{ font-size:17px; font-weight:600; line-height:1.5; margin:12px 0 10px; }
  .rel-body p{ font-size:14.5px; color:var(--ink-2); line-height:1.8; }
  .rel-more{
    display:inline-flex; align-items:center; gap:6px; margin-top:14px;
    font-size:14px; font-weight:600; color:var(--spruce);
  }
  .rel-card:hover .rel-more{ color:var(--sand); }

  /* ---------- 收藏 / 分享 CTA ---------- */
  .cta-band{
    background:var(--night); color:#F2EFE8; width:100%;
  }
  .cta-inner{
    display:flex; flex-direction:column; gap:26px;
    padding-block:56px;
  }
  @media (min-width:1024px){
    .cta-inner{ flex-direction:row; align-items:center; justify-content:space-between; padding-block:64px; }
  }
  .cta-inner h2{ font-size:clamp(21px,2.8vw,30px); line-height:1.35; font-weight:700; margin-bottom:12px; }
  .cta-inner p{ color:rgba(242,239,232,.76); max-width:560px; }
  .cta-actions{ display:flex; flex-wrap:wrap; align-items:center; gap:12px; }
  .icon-btn{
    width:48px; height:48px; border-radius:var(--r-btn);
    display:inline-flex; align-items:center; justify-content:center;
    background:rgba(242,239,232,.1); color:#F2EFE8;
    border:1.5px solid rgba(242,239,232,.25);
    transition:background .2s ease-out, color .2s ease-out, border-color .2s ease-out;
  }
  .icon-btn:hover{ background:var(--sand); border-color:var(--sand); color:#fff; }
  .share-tip{
    display:inline-flex; align-items:center; gap:6px;
    font-size:14px; font-weight:600; color:var(--ok);
    opacity:0; transform:translateY(4px);
    transition:opacity .2s ease-out, transform .2s ease-out;
  }
  .share-tip.show{ opacity:1; transform:translateY(0); }

  /* ---------- 页脚 ---------- */
  .foot-link{
    font-size:14px; color:rgba(242,239,232,.72);
    transition:color .18s ease-out;
  }
  .foot-link:hover{ color:var(--sand-light); text-decoration:underline; text-underline-offset:3px; }

  /* ---------- 移动端底部 Tab ---------- */
  .tabbar{
    position:fixed; left:0; right:0; bottom:0; z-index:60;
    display:flex; align-items:stretch;
    background:rgba(255,255,255,.97);
    -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  @media (min-width:1024px){ .tabbar{ display:none; } }
  .tab-item{
    flex:1; display:flex; flex-direction:column; align-items:center; gap:3px;
    padding:9px 2px 7px; min-height:44px;
    font-size:11px; color:var(--ink-3);
    transition:color .18s ease-out;
  }
  .tab-item i{ font-size:22px; line-height:1; }
  .tab-item.active{ color:var(--spruce); font-weight:600; }
  .tab-item.active i{ color:var(--sand); }

  /* ---------- 抽屉 ---------- */
  .drawer{
    position:fixed; inset:0; z-index:80;
    opacity:0; visibility:hidden;
    transition:opacity .22s ease-out, visibility .22s ease-out;
  }
  .drawer.open{ opacity:1; visibility:visible; }
  .drawer-mask{ position:absolute; inset:0; background:rgba(14,42,38,.5); }
  .drawer-panel{
    position:absolute; top:0; right:0; bottom:0;
    width:min(84vw,340px); background:#fff;
    box-shadow:var(--sh-3); padding:20px;
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform .26s ease-out;
    padding-bottom:calc(20px + env(safe-area-inset-bottom));
  }
  .drawer.open .drawer-panel{ transform:translateX(0); }
  .drawer-link{
    display:flex; align-items:center; justify-content:space-between;
    padding:14px 4px; font-size:16px; font-weight:500; color:var(--ink);
    border-bottom:1px solid var(--line);
    transition:color .18s ease-out, padding-left .18s ease-out;
  }
  .drawer-link:hover, .drawer-link.active{ color:var(--spruce); }
  .drawer-link.active{ font-weight:600; }

/* roulang page: category4 */
:root{
    --spruce:#17594E;
    --deep:#0E3A33;
    --mist:#E8F1EE;
    --clay:#E0763A;
    --clay-light:#F2A15F;
    --celadon:#7FA99B;
    --paper:#F7F5F0;
    --night:#0E2A26;
    --ink:#16211E;
    --sub:#55605B;
    --mute:#8A948F;
    --line:#E6E2D9;
    --r-card:16px;
    --r-img:14px;
    --r-btn:10px;
    --s1:0 1px 2px rgba(14,42,38,.06);
    --s2:0 8px 24px rgba(14,42,38,.08);
    --s3:0 16px 36px rgba(14,42,38,.14);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    padding-bottom:76px;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}
  .num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;}
  time{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;}

  .container-x{max-width:1200px;margin:0 auto;padding-left:18px;padding-right:18px;}
  @media (min-width:768px){.container-x{padding-left:24px;padding-right:24px;}}
  @media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px;}}

  /* 导航 */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:60;
    background:rgba(247,245,240,.92);
    border-bottom:1px solid transparent;
    transition:background .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }
  .site-header.is-scrolled{
    background:#fff;
    border-bottom-color:var(--line);
    box-shadow:var(--s1);
  }
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--sub);
    padding:6px 0;transition:color .18s ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
    background:var(--clay);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
  }
  .nav-link:hover{color:var(--spruce);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--spruce);font-weight:600;}
  .nav-link.active::after{transform:scaleX(1);}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;cursor:pointer;border:1.5px solid transparent;
    transition:background .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  }
  .btn-primary{background:var(--spruce);color:#fff;box-shadow:var(--s1);}
  .btn-primary:hover{background:var(--deep);transform:translateY(-1px);box-shadow:var(--s2);color:#fff;}
  .btn-outline{background:#fff;border-color:var(--spruce);color:var(--spruce);}
  .btn-outline:hover{background:var(--mist);transform:translateY(-1px);}
  .btn-on-dark{background:transparent;border-color:rgba(242,239,232,.55);color:#F2EFE8;}
  .btn-on-dark:hover{border-color:var(--clay-light);color:var(--clay-light);transform:translateY(-1px);}
  .btn-ghost{background:transparent;color:var(--spruce);padding:0 6px;}
  .btn-ghost:hover{color:var(--clay);}
  .btn[disabled],.btn.is-disabled{opacity:.55;filter:saturate(.4);pointer-events:none;}
  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
    outline:2px solid var(--spruce);outline-offset:2px;border-radius:6px;
  }

  /* 抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(14,42,38,.45);opacity:0;pointer-events:none;
    transition:opacity .22s ease-out;z-index:70;
  }
  .drawer-mask.open{opacity:1;pointer-events:auto;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:#fff;z-index:80;
    transform:translateX(102%);transition:transform .26s ease-out;
    display:flex;flex-direction:column;padding:20px 20px 28px;overflow-y:auto;
  }
  .drawer.open{transform:translateX(0);}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    min-height:50px;padding:0 14px;border-radius:var(--r-btn);
    font-size:16px;font-weight:500;color:var(--ink);border:1px solid var(--line);
    transition:background .18s ease-out,border-color .18s ease-out,color .18s ease-out;
  }
  .drawer-link:hover{background:var(--mist);border-color:rgba(23,89,78,.3);}
  .drawer-link.active{background:var(--mist);border-color:var(--spruce);color:var(--spruce);font-weight:600;}

  /* 底部 Tab */
  .tabbar{
    position:fixed;left:0;right:0;bottom:0;z-index:60;
    background:rgba(255,255,255,.97);border-top:1px solid var(--line);
    display:grid;grid-template-columns:repeat(5,1fr);
    padding-bottom:env(safe-area-inset-bottom);
    backdrop-filter:blur(6px);
  }
  .tab-item{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    min-height:60px;font-size:11px;color:var(--mute);transition:color .18s ease-out;
  }
  .tab-item i{font-size:18px;}
  .tab-item.active{color:var(--spruce);font-weight:600;}
  .tab-item.active i{color:var(--clay);}
  @media (min-width:1024px){
    .tabbar{display:none;}
    body{padding-bottom:0;}
  }

  /* Hero */
  .hero-band{
    position:relative;margin-top:68px;overflow:hidden;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
  }
  .hero-band::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(103deg, rgba(23,89,78,.94) 0%, rgba(14,58,51,.86) 52%, rgba(14,42,38,.66) 100%);
  }
  .hero-band > .inner{position:relative;z-index:2;}
  .crumb{font-size:13px;color:rgba(242,239,232,.72);display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
  .crumb a:hover{color:var(--clay-light);}
  .crumb .sep{opacity:.5;}
  .crumb .cur{color:rgba(242,239,232,.92);}

  /* 标签筛选条 */
  .filterbar{
    display:flex;gap:10px;overflow-x:auto;padding:6px 2px 12px;
    scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
  }
  .filterbar::-webkit-scrollbar{height:6px;}
  .filterbar::-webkit-scrollbar-thumb{background:rgba(23,89,78,.22);border-radius:99px;}
  .chip{
    flex:0 0 auto;scroll-snap-align:start;
    display:inline-flex;align-items:center;gap:7px;min-height:38px;padding:0 16px;
    border-radius:999px;border:1px solid var(--line);background:#fff;
    font-size:14px;font-weight:500;color:var(--sub);cursor:pointer;
    transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
  }
  .chip:hover{border-color:rgba(23,89,78,.35);color:var(--spruce);transform:translateY(-1px);}
  .chip.active{background:var(--spruce);border-color:var(--spruce);color:#fff;font-weight:600;}
  .chip .dot{width:6px;height:6px;border-radius:99px;background:var(--celadon);}
  .chip.active .dot{background:var(--clay-light);}

  /* 卡片 */
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--s1);overflow:hidden;
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
    display:flex;flex-direction:column;height:100%;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--s2);border-color:rgba(23,89,78,.3);}
  .card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--mist);}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
  .card:hover .card-media img{transform:scale(1.04);}
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;
    background:rgba(23,89,78,.08);color:var(--spruce);font-size:12px;font-weight:600;
  }
  .badge-clay{background:rgba(224,118,58,.12);color:#B1541E;}
  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

  /* 步骤 */
  .step{
    position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:24px 22px;box-shadow:var(--s1);height:100%;
    transition:transform .2s ease-out,box-shadow .2s ease-out;
  }
  .step:hover{transform:translateY(-2px);box-shadow:var(--s2);}
  .step-no{
    width:40px;height:40px;border-radius:12px;background:var(--spruce);color:#fff;
    display:grid;place-items:center;font-weight:700;font-size:16px;
    font-family:Inter,system-ui,sans-serif;
  }
  .step::after{
    content:"";position:absolute;left:0;top:0;width:3px;height:100%;border-radius:var(--r-card) 0 0 var(--r-card);
    background:linear-gradient(180deg,var(--clay) 0%,rgba(224,118,58,0) 100%);
  }

  /* 深色数据带 */
  .night-band{
    background:var(--night);color:#F2EFE8;position:relative;overflow:hidden;
    border-radius:20px;
  }
  .night-band::before{
    content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle, rgba(242,161,95,.22) 0%, rgba(242,161,95,0) 70%);
  }
  .data-cell{
    background:rgba(255,255,255,.05);border:1px solid rgba(242,239,232,.14);
    border-radius:var(--r-card);padding:20px;
  }
  .data-cell strong{display:block;font-size:19px;font-weight:700;margin-bottom:6px;color:#F2EFE8;}

  /* 互链卡 */
  .link-card{
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:18px 20px;box-shadow:var(--s1);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .link-card:hover{transform:translateY(-2px);box-shadow:var(--s2);border-color:rgba(23,89,78,.3);}
  .link-card.is-current{border-color:var(--spruce);background:var(--mist);}

  /* FAQ */
  .faq-item{
    background:#fff;border:1px solid var(--line);border-left:3px solid var(--line);
    border-radius:12px;padding:4px 20px;margin-bottom:12px;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .faq-item:hover{box-shadow:var(--s1);}
  .faq-item[open]{border-left-color:var(--spruce);box-shadow:var(--s1);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
    padding:16px 0;font-size:17px;font-weight:600;color:var(--ink);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-icon{
    flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--mist);color:var(--spruce);
    display:grid;place-items:center;font-size:12px;transition:transform .22s ease-out,background .22s ease-out,color .22s ease-out;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--clay);color:#fff;}
  .faq-a{padding:0 0 18px;font-size:15px;line-height:1.85;color:var(--sub);border-top:1px dashed var(--line);padding-top:14px;}

  /* CTA 带 */
  .cta-band{
    position:relative;overflow:hidden;background:var(--night);
    border-radius:20px;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;background-position:center;opacity:.16;
  }
  .cta-band > .inner{position:relative;z-index:2;}

  .icon-btn{
    width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
    border:1.5px solid rgba(242,239,232,.4);color:#F2EFE8;background:transparent;cursor:pointer;
    transition:border-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
  }
  .icon-btn:hover{border-color:var(--clay-light);color:var(--clay-light);transform:translateY(-1px);}

  .foot-link{
    font-size:14px;color:rgba(242,239,232,.72);display:inline-block;padding:3px 0;
    border-bottom:1px solid transparent;transition:color .18s ease-out,border-color .18s ease-out;
  }
  .foot-link:hover{color:var(--clay-light);border-bottom-color:rgba(242,161,95,.7);}

  .section{padding-top:48px;padding-bottom:48px;}
  @media (min-width:768px){.section{padding-top:64px;padding-bottom:64px;}}
  @media (min-width:1024px){.section{padding-top:88px;padding-bottom:88px;}}

  .sec-title{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;}
  .sec-sub{color:var(--sub);font-size:15px;margin-top:10px;}
  .card-title{font-size:18px;line-height:1.45;font-weight:600;}
  .toast{
    position:fixed;left:50%;bottom:96px;transform:translate(-50%,12px);
    background:var(--night);color:#F2EFE8;font-size:14px;padding:10px 18px;border-radius:999px;
    opacity:0;pointer-events:none;transition:opacity .22s ease-out,transform .22s ease-out;z-index:90;
  }
  .toast.show{opacity:1;transform:translate(-50%,0);}
  @media (min-width:1024px){.toast{bottom:36px;}}