/* roulang page: index */
:root{
    --bg:#0B0F14;
    --bg-2:#121821;
    --card:#161D27;
    --float:#1C2531;
    --line:#232C3A;
    --line-soft:rgba(35,44,58,.6);
    --mint:#16E0A3;
    --mint-2:#0FB985;
    --coral:#FF6B4A;
    --txt:#F2F6FA;
    --txt-2:#A7B3C2;
    --txt-3:#6C7A8C;
    --ok:#31C48D;
    --warn:#F5A524;
    --err:#F05252;
    --r-card:16px;
    --r-panel:20px;
    --r-btn:10px;
    --sh-card:0 12px 32px rgba(0,0,0,.45);
    --sh-hover:0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18),0 12px 32px rgba(0,0,0,.45);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--txt);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    overflow-x:hidden;
    padding-bottom:0;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
  input{font-family:inherit}
  h1,h2,h3,h4,p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  ::selection{background:rgba(22,224,163,.28);color:#fff}
  :focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:var(--bg)}
  ::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
  ::-webkit-scrollbar-thumb:hover{background:var(--mint)}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .section{padding:96px 0;position:relative;scroll-margin-top:96px}
  .section-tight{padding:72px 0}
  .divider{height:1px;background:var(--line-soft);border:0;margin:0}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;letter-spacing:.14em;color:var(--mint);
    border:1px solid rgba(22,224,163,.3);
    background:rgba(22,224,163,.08);
    padding:5px 14px;border-radius:999px;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 10px var(--mint)}

  .h1{
    font-size:clamp(30px,4.4vw,54px);
    line-height:1.16;
    font-weight:800;
    letter-spacing:-.01em;
  }
  .h1 em{font-style:normal;color:var(--mint)}
  .h2{
    font-size:clamp(24px,2.6vw,34px);
    line-height:1.28;
    font-weight:800;
    letter-spacing:-.01em;
  }
  .h3{font-size:clamp(18px,1.6vw,21px);font-weight:700;line-height:1.45}
  .lead{color:var(--txt-2);font-size:clamp(15px,1.1vw,17px);line-height:1.9}
  .muted{color:var(--txt-3);font-size:14px}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.02em;
    transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{background:var(--mint);color:#0B0F14;box-shadow:0 10px 26px rgba(22,224,163,.22)}
  .btn-primary:hover{background:#28eeb2;transform:translateY(-2px);box-shadow:0 14px 32px rgba(22,224,163,.3)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{border:1px solid var(--line);color:var(--txt);background:transparent}
  .btn-ghost:hover{border-color:var(--mint);background:rgba(22,224,163,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:scale(.98)}
  .btn-coral{background:var(--coral);color:#0B0F14}
  .btn-coral:hover{background:#ff7f61;transform:translateY(-2px)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;color:var(--mint);font-size:14px;font-weight:600;
    transition:gap .2s var(--ease),color .2s var(--ease);
  }
  .link-arrow svg{transition:transform .2s var(--ease)}
  .link-arrow:hover{gap:10px}
  .link-arrow:hover svg{transform:translateX(4px)}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;line-height:1;padding:6px 12px;border-radius:999px;
    border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--txt-2);
  }
  .badge-coral{border-color:rgba(255,107,74,.35);background:rgba(255,107,74,.1);color:#ff9b83}
  .badge-mint{border-color:rgba(22,224,163,.35);background:rgba(22,224,163,.1);color:#5cf0c2}

  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
    position:relative;
    overflow:hidden;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(22,224,163,.35)}
  .card:hover .card-title{color:var(--mint)}
  .card-title{transition:color .2s var(--ease)}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(11,15,20,.86);
    backdrop-filter:blur(10px);
    border-bottom:1px solid transparent;
    transition:border-color .25s var(--ease),background .25s var(--ease);
  }
  .site-header.scrolled{border-bottom-color:var(--line);background:rgba(11,15,20,.94)}
  .nav-bar{
    height:72px;display:flex;align-items:center;gap:20px;
  }
  .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{width:32px;height:32px;display:block}
  .logo-text{font-size:17px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
  .logo-text span{color:var(--mint)}
  .nav-search{
    flex:1 1 auto;max-width:520px;margin:0 auto;
    display:flex;align-items:center;gap:10px;
    height:44px;padding:0 8px 0 16px;
    background:var(--bg-2);
    border:1px solid var(--line);
    border-radius:999px;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
  }
  .nav-search:focus-within{
    border-color:var(--mint);
    background:var(--card);
    box-shadow:0 0 0 2px rgba(22,224,163,.28),0 0 24px rgba(22,224,163,.16);
  }
  .nav-search svg{flex:0 0 auto;color:var(--txt-3)}
  .nav-search input{
    flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
    color:var(--txt);font-size:14.5px;outline:none;
  }
  .nav-search input::placeholder{color:var(--txt-3)}
  .search-key{
    flex:0 0 auto;font-size:11.5px;color:var(--txt-3);
    border:1px solid var(--line);border-radius:999px;padding:3px 9px;background:rgba(255,255,255,.02);
  }
  .search-go{
    flex:0 0 auto;width:32px;height:32px;border-radius:999px;background:var(--mint);color:#0B0F14;
    display:flex;align-items:center;justify-content:center;transition:background .2s var(--ease),transform .2s var(--ease);
  }
  .search-go:hover{background:#28eeb2;transform:translateY(-1px)}
  .nav-links{display:flex;align-items:center;gap:4px;flex:0 0 auto}
  .nav-link{
    font-size:14.5px;color:var(--txt-2);padding:8px 13px;border-radius:999px;
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .nav-link:hover{color:var(--txt);background:rgba(255,255,255,.04)}
  .nav-link.active{color:var(--mint);background:rgba(22,224,163,.1)}
  .burger{
    display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
    align-items:center;justify-content:center;color:var(--txt);
  }
  .burger:hover{border-color:var(--mint);color:var(--mint)}
  .mobile-nav{
    display:none;border-top:1px solid var(--line);background:var(--bg-2);
    padding:12px 24px 22px;
  }
  .mobile-nav.open{display:block}
  .mobile-nav a{
    display:block;padding:12px 4px;border-bottom:1px solid var(--line-soft);
    color:var(--txt-2);font-size:15px;
  }
  .mobile-nav a.active{color:var(--mint)}
  .mobile-search{
    display:none;align-items:center;gap:10px;height:44px;padding:0 16px;margin:12px 0 4px;
    background:var(--bg-2);border:1px solid var(--line);border-radius:999px;
  }
  .mobile-search input{flex:1;border:0;background:transparent;color:var(--txt);outline:none;font-size:14.5px}

  /* ---------- hero ---------- */
  .hero{position:relative;padding:72px 0 88px;overflow:hidden}
  .hero::before{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(circle at 12% 8%,rgba(22,224,163,.13),transparent 42%),
      radial-gradient(circle at 88% 92%,rgba(255,107,74,.09),transparent 46%);
    pointer-events:none;
  }
  .hero-grid{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center}
  .hero-title{margin:22px 0 18px}
  .hero-sub{margin-bottom:28px;max-width:520px}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
  .trust-row{display:flex;flex-wrap:wrap;gap:10px}
  .trust-pill{
    font-size:13px;color:var(--txt-2);
    border:1px solid var(--line);border-radius:999px;padding:7px 14px;
    background:rgba(255,255,255,.02);
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .trust-pill:hover{border-color:rgba(22,224,163,.4);color:var(--mint)}

  .hero-visual{position:relative}
  .hero-figure{
    position:relative;border-radius:var(--r-panel);overflow:hidden;
    border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.55);
    aspect-ratio:16/10;
  }
  .hero-figure img{width:100%;height:100%;object-fit:cover}
  .hero-figure::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,15,20,.15),rgba(11,15,20,.72));
  }
  .figure-caption{
    margin-top:10px;font-size:12.5px;color:var(--txt-3);text-align:right;
  }
  .float-card{
    position:absolute;background:rgba(28,37,49,.94);
    border:1px solid var(--line);border-radius:14px;padding:14px 16px;
    box-shadow:0 16px 40px rgba(0,0,0,.5);
    backdrop-filter:blur(6px);
  }
  .float-card .fc-num{font-size:22px;font-weight:800;color:var(--mint);line-height:1.2}
  .float-card .fc-label{font-size:12.5px;color:var(--txt-2);margin-top:2px}
  .fc-top{top:20px;left:-24px}
  .fc-bottom{bottom:26px;right:-16px}

  /* ---------- features ---------- */
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
  .sec-head .max-w-xl{max-width:640px}
  .feature-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
  .fcard{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:30px;box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
    position:relative;overflow:hidden;
  }
  .fcard:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .fcard::before{
    content:"";position:absolute;top:0;right:0;width:96px;height:96px;
    background:radial-gradient(circle at 100% 0,rgba(22,224,163,.16),transparent 70%);
    pointer-events:none;
  }
  .fcard-lg{grid-column:span 3}
  .fcard-sm{grid-column:span 2}
  .ficon{
    width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
    background:rgba(22,224,163,.1);border:1px solid rgba(22,224,163,.28);color:var(--mint);
    margin-bottom:18px;
  }
  .fcard h3{margin-bottom:10px}
  .fcard p{color:var(--txt-2);font-size:15px;line-height:1.85}
  .fcard .fmedia{
    margin-top:22px;border-radius:14px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;
  }
  .fcard .fmedia img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
  .fcard:hover .fmedia img{transform:scale(1.04)}

  /* ---------- demo ---------- */
  .demo-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
  .steps{position:relative;margin-top:32px;padding-left:0}
  .step{position:relative;padding-left:64px;padding-bottom:34px}
  .step:last-child{padding-bottom:0}
  .step::after{
    content:"";position:absolute;left:23px;top:48px;bottom:2px;width:1px;
    background:linear-gradient(180deg,rgba(22,224,163,.5),rgba(35,44,58,.2));
  }
  .step:last-child::after{display:none}
  .step-num{
    position:absolute;left:0;top:2px;width:48px;height:48px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    font-size:15px;font-weight:800;color:var(--mint);
    background:rgba(22,224,163,.08);border:1px solid rgba(22,224,163,.3);
  }
  .step h3{margin-bottom:6px}
  .step p{color:var(--txt-2);font-size:15px}
  .demo-visual{
    border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--line);
    box-shadow:0 24px 60px rgba(0,0,0,.5);aspect-ratio:16/11;position:relative;
  }
  .demo-visual img{width:100%;height:100%;object-fit:cover}
  .demo-visual .demo-tag{
    position:absolute;left:20px;bottom:20px;
    background:rgba(11,15,20,.8);border:1px solid var(--line);border-radius:999px;
    padding:8px 16px;font-size:13px;color:var(--txt-2);backdrop-filter:blur(6px);
  }

  /* ---------- news ---------- */
  .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .news-card{
    display:flex;flex-direction:column;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .news-card:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .news-thumb{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-2)}
  .news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
  .news-card:hover .news-thumb img{transform:scale(1.05)}
  .news-body{padding:22px;display:flex;flex-direction:column;flex:1 1 auto;gap:12px}
  .news-title{
    font-size:17px;font-weight:700;line-height:1.5;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
    transition:color .2s var(--ease);
  }
  .news-card:hover .news-title{color:var(--mint)}
  .news-excerpt{
    color:var(--txt-2);font-size:14.5px;line-height:1.8;
    display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-meta{
    margin-top:auto;padding-top:14px;border-top:1px solid var(--line-soft);
    display:flex;align-items:center;gap:10px;font-size:13px;color:var(--txt-3);
  }
  .news-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--txt-3)}
  .news-meta .news-more{margin-left:auto;color:var(--mint)}

  .empty-state{
    grid-column:1/-1;text-align:center;padding:64px 24px;
    border:1px dashed var(--line);border-radius:var(--r-card);background:var(--bg-2);color:var(--txt-3);
  }
  .empty-state svg{width:56px;height:56px;margin:0 auto 16px;color:var(--txt-3)}
  .empty-state p{margin-bottom:16px;font-size:15px}

  /* ---------- proof ---------- */
  .stat-row{
    display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
    padding:32px;border:1px solid var(--line);border-radius:var(--r-panel);
    background:var(--bg-2);
  }
  .stat{border-right:1px solid var(--line-soft);padding-right:20px}
  .stat:last-child{border-right:0;padding-right:0}
  .stat .num{font-size:clamp(26px,3vw,36px);font-weight:800;color:var(--mint);line-height:1.1}
  .stat .lbl{font-size:13.5px;color:var(--txt-2);margin-top:8px}
  .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px;align-items:start}
  .quote-card{padding:28px}
  .quote-card.wide{grid-column:span 2}
  .quote-text{color:var(--txt-2);font-size:15px;line-height:1.9;margin-bottom:20px}
  .quote-user{display:flex;align-items:center;gap:12px}
  .avatar{
    width:40px;height:40px;border-radius:999px;flex:0 0 auto;
    display:flex;align-items:center;justify-content:center;
    background:rgba(22,224,163,.1);border:1px solid rgba(22,224,163,.3);
    color:var(--mint);font-weight:700;font-size:14px;
  }
  .avatar.coral{background:rgba(255,107,74,.1);border-color:rgba(255,107,74,.3);color:#ff9b83}
  .quote-user .name{font-size:14.5px;font-weight:600}
  .quote-user .role{font-size:12.5px;color:var(--txt-3)}
  .logo-wall{
    margin-top:36px;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
    padding-top:28px;border-top:1px solid var(--line-soft);
  }
  .logo-item{
    flex:1 1 150px;text-align:center;padding:14px 10px;
    border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.015);
    color:var(--txt-3);font-size:13.5px;letter-spacing:.06em;
    filter:grayscale(1);transition:filter .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  }
  .logo-item:hover{filter:grayscale(0);color:var(--mint);border-color:rgba(22,224,163,.35)}

  /* ---------- pricing ---------- */
  .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;margin-top:20px}
  .price-card{padding:32px 28px;display:flex;flex-direction:column}
  .price-card.dim{opacity:.82}
  .price-card.featured{
    border-color:rgba(22,224,163,.5);
    box-shadow:0 0 0 1px rgba(22,224,163,.35),0 0 32px rgba(22,224,163,.16),var(--sh-card);
    transform:translateY(-14px);
  }
  .price-card.featured:hover{transform:translateY(-18px)}
  .plan-badge{
    position:absolute;top:0;left:50%;transform:translate(-50%,-50%);
    background:var(--mint);color:#0B0F14;font-size:12.5px;font-weight:700;
    padding:6px 16px;border-radius:999px;white-space:nowrap;
  }
  .plan-name{font-size:18px;font-weight:700;margin-bottom:6px}
  .plan-desc{font-size:13.5px;color:var(--txt-3);margin-bottom:22px}
  .plan-price{display:flex;align-items:baseline;gap:6px;margin-bottom:24px}
  .plan-price .amount{font-size:40px;font-weight:800;letter-spacing:-.02em}
  .plan-price .unit{font-size:14px;color:var(--txt-3)}
  .plan-features{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
  .plan-features li{display:flex;gap:10px;font-size:14.5px;color:var(--txt-2);line-height:1.7}
  .plan-features svg{flex:0 0 auto;margin-top:5px;color:var(--mint)}
  .plan-cta{margin-top:auto}

  /* ---------- faq ---------- */
  .faq-wrap{max-width:840px;margin:0 auto}
  .faq-item{
    border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);
    margin-bottom:14px;overflow:hidden;position:relative;
    transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .faq-item::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--mint);
    transform:scaleY(0);transform-origin:top;transition:transform .25s var(--ease);
  }
  .faq-item.open{border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .faq-item.open::before{transform:scaleY(1)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:22px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--txt);
  }
  .faq-q:hover{color:var(--mint)}
  .faq-icon{
    flex:0 0 auto;width:26px;height:26px;border-radius:8px;
    display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);color:var(--mint);font-size:16px;line-height:1;
    transition:transform .3s var(--ease),background .25s var(--ease);
  }
  .faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(22,224,163,.12);border-color:rgba(22,224,163,.4)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
  .faq-a-inner{padding:0 24px 24px 24px;color:var(--txt-2);font-size:15px;line-height:1.9}

  /* ---------- cta ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    border:1px solid rgba(22,224,163,.28);
    border-radius:var(--r-panel);
    background:
      linear-gradient(120deg,rgba(22,224,163,.14),rgba(22,224,163,.04) 55%,rgba(255,107,74,.08)),
      var(--bg-2);
    padding:56px 48px;
    display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  }
  .cta-band::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
    background-size:44px 44px;
    mask-image:radial-gradient(circle at 20% 20%,#000,transparent 75%);
    -webkit-mask-image:radial-gradient(circle at 20% 20%,#000,transparent 75%);
  }
  .cta-band > *{position:relative;z-index:1}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

  /* ---------- footer ---------- */
  .site-footer{border-top:1px solid var(--line);background:var(--bg-2);margin-top:96px;padding:64px 0 0}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-desc{color:var(--txt-3);font-size:14px;line-height:1.9;max-width:320px}
  .footer-title{font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.04em}
  .footer-list li{margin-bottom:11px}
  .footer-list a{color:var(--txt-2);font-size:14px;transition:color .2s var(--ease),text-underline-offset .2s var(--ease)}
  .footer-list a:hover{color:var(--mint);text-decoration:underline;text-underline-offset:4px}
  .footer-bottom{
    margin-top:48px;padding:22px 0;border-top:1px solid var(--line-soft);
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    color:var(--txt-3);font-size:13px;
  }
  .footer-bottom a{color:var(--txt-3)}
  .footer-bottom a:hover{color:var(--mint)}

  /* ---------- floating dock ---------- */
  .float-dock{
    position:fixed;right:24px;bottom:32px;z-index:70;
    display:flex;flex-direction:column;gap:12px;
    opacity:0;visibility:hidden;transform:translateY(14px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
  }
  .float-dock.show{opacity:1;visibility:visible;transform:translateY(0)}
  .dock-btn{
    display:flex;align-items:center;gap:0;
    height:52px;padding:0 15px;border-radius:999px;
    background:var(--float);border:1px solid var(--line);color:var(--txt);
    box-shadow:0 12px 30px rgba(0,0,0,.5);
    transition:gap .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
  }
  .dock-btn svg{flex:0 0 auto}
  .dock-btn .dock-text{
    max-width:0;overflow:hidden;white-space:nowrap;font-size:14px;font-weight:600;
    transition:max-width .3s var(--ease),margin .3s var(--ease);
  }
  .dock-btn:hover{gap:8px;border-color:rgba(22,224,163,.5);color:var(--mint)}
  .dock-btn:hover .dock-text{max-width:140px;margin-left:2px}
  .dock-primary{background:var(--mint);color:#0B0F14;border-color:var(--mint)}
  .dock-primary:hover{background:#28eeb2;color:#0B0F14;border-color:#28eeb2}

  .mobile-bar{
    display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
    height:60px;padding:0 16px;gap:12px;align-items:center;
    background:rgba(18,24,33,.96);border-top:1px solid var(--line);
    backdrop-filter:blur(10px);
  }
  .mobile-bar .mb-cta{
    flex:1 1 auto;height:42px;border-radius:999px;background:var(--mint);color:#0B0F14;
    display:flex;align-items:center;justify-content:center;font-size:14.5px;font-weight:700;
  }
  .mobile-bar .mb-top{
    flex:0 0 auto;width:42px;height:42px;border-radius:999px;
    border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--txt);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1023px){
    .nav-links{display:none}
    .nav-search{max-width:none}
    .burger{display:flex}
    .hero-grid{grid-template-columns:1fr;gap:44px}
    .hero{padding:48px 0 64px}
    .fc-top{left:0}
    .fc-bottom{right:0}
    .demo-grid{grid-template-columns:1fr;gap:40px}
    .feature-grid{grid-template-columns:repeat(4,1fr)}
    .fcard-lg{grid-column:span 4}
    .fcard-sm{grid-column:span 2}
    .news-grid{grid-template-columns:repeat(2,1fr)}
    .stat-row{grid-template-columns:repeat(2,1fr);gap:28px}
    .stat:nth-child(2){border-right:0;padding-right:0}
    .quote-grid{grid-template-columns:1fr 1fr}
    .quote-card.wide{grid-column:span 2}
    .price-grid{grid-template-columns:1fr;max-width:520px;margin:20px auto 0}
    .price-card.featured{transform:none}
    .price-card.featured:hover{transform:translateY(-4px)}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .section{padding:72px 0}
    .cta-band{padding:44px 32px}
  }
  @media (max-width:767px){
    .shell{padding:0 16px}
    .news-grid{grid-template-columns:1fr}
    .quote-grid{grid-template-columns:1fr}
    .quote-card.wide{grid-column:span 1}
    .stat-row{grid-template-columns:1fr;padding:24px}
    .stat{border-right:0;border-bottom:1px solid var(--line-soft);padding:0 0 20px}
    .stat:last-child{border-bottom:0;padding-bottom:0}
    .cta-band{padding:36px 22px;flex-direction:column;align-items:flex-start}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 auto}
    .section{padding:56px 0}
    .float-dock{display:none}
    .mobile-bar{display:flex}
    body{padding-bottom:60px}
    .hero-figure{aspect-ratio:4/3}
    .fc-top{top:12px;left:12px}
    .fc-bottom{bottom:12px;right:12px}
    .float-card{padding:10px 12px}
    .float-card .fc-num{font-size:18px}
    .figure-caption{text-align:left}
  }
  @media (max-width:519px){
    .feature-grid{grid-template-columns:1fr}
    .fcard-lg,.fcard-sm{grid-column:span 1}
    .fcard{padding:22px}
    .footer-grid{grid-template-columns:1fr}
    .hero-cta .btn{width:100%}
    .nav-bar{height:64px;gap:12px}
    .search-key{display:none}
  }

/* roulang page: article */
:root{
    --brand:#16E0A3;
    --brand-soft:rgba(22,224,163,.12);
    --accent:#FF6B4A;
    --accent-soft:rgba(255,107,74,.12);
    --bg:#0B0F14;
    --bg-2:#121821;
    --card:#161D27;
    --elev:#1C2531;
    --line:#232C3A;
    --line-soft:rgba(35,44,58,.6);
    --text:#F2F6FA;
    --muted:#A7B3C2;
    --weak:#6C7A8C;
    --ok:#31C48D;
    --warn:#F5A524;
    --err:#F05252;
    --r-card:16px;
    --r-panel:20px;
    --r-btn:10px;
    --shadow:0 12px 32px rgba(0,0,0,.45);
    --s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:24px;--s-6:32px;--s-7:48px;--s-8:64px;--s-9:96px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit}
  h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em;font-weight:800}
  p{margin:0 0 1.3em}
  ul,ol{margin:0;padding:0;list-style:none}
  ::selection{background:rgba(22,224,163,.3)}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:var(--bg)}
  ::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px}
  ::-webkit-scrollbar-thumb:hover{background:var(--brand)}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .skip-link{position:absolute;left:-9999px;top:8px;z-index:99;background:var(--brand);color:var(--bg);padding:8px 16px;border-radius:8px}
  .skip-link:focus{left:16px}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(11,15,20,.9);
    backdrop-filter:blur(12px);
    border-bottom:1px solid transparent;
    transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
  }
  .site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 10px 28px rgba(0,0,0,.45);background:rgba(11,15,20,.96)}
  .header-inner{display:flex;align-items:center;gap:20px;height:72px}
  .brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;white-space:nowrap}
  .brand .logo-mark{width:30px;height:30px;flex:none}
  .brand .logo-text{color:var(--text)}
  .brand .logo-text span{color:var(--brand)}
  .search{
    flex:1 1 auto;max-width:520px;display:flex;align-items:center;gap:10px;
    height:44px;padding:0 14px;
    background:var(--bg-2);border:1px solid var(--line);border-radius:999px;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .search:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(22,224,163,.25),0 0 24px rgba(22,224,163,.16)}
  .search svg{flex:none;color:var(--weak)}
  .search input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--text);font-size:14px}
  .search input::placeholder{color:var(--weak)}
  .kbd{flex:none;border:1px solid var(--line);border-radius:6px;padding:1px 7px;font-size:11px;color:var(--weak);letter-spacing:0}
  .nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
  .nav-link{
    display:inline-block;padding:9px 14px;border-radius:999px;
    font-size:14px;color:var(--muted);transition:color .2s ease, background .2s ease;
  }
  .nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
  .nav-link.active{color:var(--bg);background:var(--brand);font-weight:700}
  .menu-toggle{
    display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
    border-radius:12px;align-items:center;justify-content:center;color:var(--text);
  }
  .menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
  .mobile-panel{display:none;border-top:1px solid var(--line);background:var(--bg-2);padding:16px 24px 22px}
  .mobile-panel.is-open{display:block}
  .mobile-panel .search{max-width:none;margin-bottom:14px}
  .mobile-panel nav{display:flex;flex-direction:column;gap:6px}
  .mobile-panel .nav-link{padding:12px 14px;border:1px solid var(--line);border-radius:12px}

  /* ---------- breadcrumb ---------- */
  .crumb{padding:26px 0 0;font-size:13px;color:var(--weak)}
  .crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
  .crumb a{color:var(--weak);transition:color .2s ease}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{color:var(--line)}
  .crumb .current{color:var(--muted)}

  /* ---------- article head ---------- */
  .article-head{padding:22px 0 34px;border-bottom:1px solid var(--line-soft)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;color:var(--brand);
    background:var(--brand-soft);border:1px solid rgba(22,224,163,.3);
    border-radius:999px;padding:5px 13px;margin-bottom:18px;
  }
  .article-head h1{font-size:clamp(30px,4vw,50px);line-height:1.22;max-width:960px}
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:20px;font-size:13.5px;color:var(--weak)}
  .meta-row .dot{width:4px;height:4px;border-radius:99px;background:var(--line);display:inline-block}
  .meta-chip{border:1px solid var(--line);border-radius:999px;padding:3px 11px;color:var(--muted);font-size:12.5px}

  /* ---------- layout ---------- */
  .article-layout{
    display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;
    padding:44px 0 8px;align-items:start;
  }
  .article-main{min-width:0}
  .article-body{max-width:820px;font-size:16.5px;color:#CBD5E0;word-break:break-word}
  .article-body > *:first-child{margin-top:0}
  .article-body h2{
    font-size:clamp(22px,2.4vw,27px);color:var(--text);
    margin:46px 0 16px;padding-left:14px;border-left:4px solid var(--brand);
  }
  .article-body h3{font-size:20px;color:var(--text);margin:32px 0 12px;display:flex;align-items:center;gap:10px}
  .article-body h3::before{content:"";width:8px;height:8px;background:var(--brand);border-radius:2px;flex:none}
  .article-body h4{font-size:17px;color:var(--text);margin:24px 0 10px}
  .article-body p{line-height:1.9;margin:0 0 1.4em}
  .article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
  .article-body a:hover{color:#4DF0BD}
  .article-body strong{color:var(--text)}
  .article-body ul,.article-body ol{margin:0 0 1.5em;padding-left:2px}
  .article-body li{position:relative;padding-left:24px;margin-bottom:10px;line-height:1.85}
  .article-body ul > li::before{
    content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;
    background:var(--brand);border-radius:2px;transform:rotate(45deg);
  }
  .article-body ol{counter-reset:li}
  .article-body ol > li::before{
    counter-increment:li;content:counter(li);
    position:absolute;left:0;top:.32em;width:18px;height:18px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);border:1px solid rgba(22,224,163,.35);
    font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;
  }
  .article-body blockquote{
    margin:26px 0;padding:18px 22px;border-left:3px solid var(--brand);
    background:rgba(22,224,163,.07);border-radius:0 12px 12px 0;color:var(--muted);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;display:block;overflow-x:auto;white-space:nowrap}
  .article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
  .article-body th{background:var(--elev);color:var(--text);font-weight:700}
  .article-body tbody tr:nth-child(even){background:rgba(255,255,255,.022)}
  .article-body img{border-radius:12px;border:1px solid var(--line);height:auto;max-width:100%}
  .article-body figure{margin:28px 0;text-align:center}
  .article-body figcaption{font-size:13px;color:var(--weak);margin-top:10px;line-height:1.7}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

  /* ---------- aside ---------- */
  .side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
  .side-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-panel);
    padding:22px;box-shadow:var(--shadow);
  }
  .side-title{font-size:14px;letter-spacing:.08em;color:var(--weak);text-transform:uppercase;margin-bottom:14px;font-weight:700}
  .toc ol{counter-reset:toc;display:flex;flex-direction:column;gap:2px}
  .toc a{
    display:block;padding:8px 10px;border-radius:10px;font-size:14px;color:var(--muted);
    border-left:2px solid transparent;transition:all .2s ease;
  }
  .toc a:hover{color:var(--brand);background:rgba(255,255,255,.04);border-left-color:var(--brand)}
  .side-list li + li{border-top:1px solid var(--line-soft)}
  .side-list a{display:flex;gap:12px;align-items:center;padding:12px 0;color:var(--muted);font-size:14px;transition:color .2s ease}
  .side-list a:hover{color:var(--brand)}
  .side-list .num{color:var(--brand);font-weight:800;font-size:13px;opacity:.75;flex:none}
  .side-note{font-size:13.5px;color:var(--weak);line-height:1.8;margin:0}

  /* ---------- footer pieces of article ---------- */
  .article-foot{max-width:820px;padding:40px 0 0;margin-top:40px;border-top:1px solid var(--line-soft)}
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:34px}
  .tag-row .label{font-size:13px;color:var(--weak);margin-right:2px}
  .tag{
    display:inline-block;padding:6px 14px;border-radius:999px;font-size:13px;
    border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--muted);
    transition:all .2s ease;
  }
  .tag:hover{border-color:rgba(22,224,163,.5);color:var(--brand);background:var(--brand-soft)}
  .nav-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:44px}
  .nav-card{
    display:block;padding:20px;border:1px solid var(--line);border-radius:var(--r-card);
    background:var(--card);transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  }
  .nav-card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.5);box-shadow:0 0 0 1px rgba(22,224,163,.3),0 0 24px rgba(22,224,163,.14)}
  .nav-card .k{font-size:12.5px;color:var(--accent);letter-spacing:.06em;display:block;margin-bottom:8px}
  .nav-card h3{font-size:17px;margin-bottom:6px}
  .nav-card:hover h3{color:var(--brand)}
  .nav-card p{margin:0;font-size:13.5px;color:var(--weak);line-height:1.75}

  .block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
  .block-head h2{font-size:clamp(20px,2.2vw,26px)}
  .block-head .more{color:var(--brand);font-size:14px;display:inline-flex;align-items:center;gap:6px}
  .block-head .more svg{transition:transform .2s ease}
  .block-head .more:hover svg{transform:translateX(4px)}

  .rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
  .rel-card{
    display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
    border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow);
    transition:transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  }
  .rel-card:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.45);box-shadow:0 0 0 1px rgba(22,224,163,.3),0 0 24px rgba(22,224,163,.14)}
  .rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--elev)}
  .rel-card .thumb img{width:100%;height:100%;object-fit:cover;border:0;border-radius:0;transition:transform .4s ease}
  .rel-card:hover .thumb img{transform:scale(1.04)}
  .rel-card .body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rel-card h3{font-size:16.5px;line-height:1.5}
  .rel-card:hover h3{color:var(--brand)}
  .rel-card p{margin:0;font-size:13.5px;color:var(--weak);line-height:1.75}
  .rel-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--weak)}
  .badge{padding:3px 11px;border-radius:999px;font-size:12px;border:1px solid rgba(255,107,74,.35);background:var(--accent-soft);color:var(--accent)}

  .mini-faq{max-width:820px;margin-top:56px}
  .mini-faq h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:20px}
  .faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease}
  .faq-item[open]{border-color:rgba(22,224,163,.45)}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;font-weight:600;font-size:16px;position:relative;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
    background:var(--brand);opacity:0;transition:opacity .2s ease;
  }
  .faq-item[open] summary::before{opacity:1}
  .faq-item summary .sign{
    flex:none;width:24px;height:24px;border-radius:999px;border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:16px;line-height:1;
    transition:transform .25s ease, border-color .25s ease;
  }
  .faq-item[open] summary .sign{transform:rotate(45deg);border-color:rgba(22,224,163,.5)}
  .faq-item .answer{padding:0 20px 20px;color:var(--muted);font-size:15px;line-height:1.85}

  .category-cta{
    max-width:820px;margin:52px 0 0;padding:30px;border-radius:var(--r-panel);
    border:1px solid rgba(22,224,163,.3);
    background:linear-gradient(180deg,rgba(22,224,163,.12),rgba(22,224,163,.03));
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  }
  .category-cta h3{font-size:20px;margin-bottom:6px}
  .category-cta p{margin:0;color:var(--muted);font-size:14px}

  .empty-state{
    max-width:820px;text-align:center;padding:64px 24px;border:1px dashed var(--line);
    border-radius:var(--r-panel);background:var(--card);
  }
  .empty-state svg{width:56px;height:56px;color:var(--weak);margin:0 auto 18px}
  .empty-state p{color:var(--weak);margin:0 0 18px}
  .empty-state .btn-primary{display:inline-flex}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:var(--r-btn);font-size:14.5px;font-weight:600;
    transition:all .2s ease;cursor:pointer;border:1px solid transparent;
  }
  .btn-primary{background:var(--brand);color:var(--bg)}
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 12px 26px rgba(22,224,163,.22)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{border-color:var(--line);color:var(--text);background:transparent}
  .btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}

  /* ---------- float cta ---------- */
  .float-cta{
    position:fixed;right:24px;bottom:28px;z-index:70;display:flex;flex-direction:column;gap:10px;
    opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s ease;
  }
  .float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
  .float-cta a,.float-cta button{
    display:flex;align-items:center;gap:10px;height:48px;padding:0 18px;border-radius:999px;
    background:var(--elev);border:1px solid var(--line);color:var(--text);font-size:14px;
    box-shadow:var(--shadow);transition:all .2s ease;white-space:nowrap;
  }
  .float-cta a:hover,.float-cta button:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
  .float-cta .primary{background:var(--brand);color:var(--bg);border-color:var(--brand);font-weight:700}
  .float-cta .primary:hover{color:var(--bg);filter:brightness(1.06)}
  .mobile-bar{display:none}

  /* ---------- footer ---------- */
  .site-footer{margin-top:96px;border-top:1px solid var(--line);background:var(--bg-2);padding:64px 0 28px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;margin-bottom:14px}
  .footer-brand .logo-mark{width:28px;height:28px}
  .footer-brand .logo-text{color:var(--text)}
  .footer-brand .logo-text span{color:var(--brand)}
  .footer-desc{margin:0;color:var(--muted);font-size:14px;line-height:1.85;max-width:360px}
  .footer-title{font-size:14px;color:var(--text);margin-bottom:16px;font-weight:700}
  .footer-list li{margin-bottom:10px}
  .footer-list a{color:var(--muted);font-size:14px;transition:color .2s ease, text-decoration-color .2s ease;text-decoration:underline;text-decoration-color:transparent;text-underline-offset:4px}
  .footer-list a:hover{color:var(--brand);text-decoration-color:var(--brand)}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    color:var(--weak);font-size:13px;
  }

  /* ---------- responsive ---------- */
  @media (max-width:1023px){
    .header-inner{height:64px;gap:12px}
    .search{display:none}
    .nav-links{display:none}
    .menu-toggle{display:flex}
    .article-layout{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:34px}
    .side{position:static;flex-direction:column}
    .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .float-cta{display:none}
    .mobile-bar{
      display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:75;
      align-items:center;gap:10px;padding:8px;border-radius:999px;
      background:rgba(28,37,49,.96);border:1px solid var(--line);box-shadow:0 14px 34px rgba(0,0,0,.55);
      backdrop-filter:blur(10px);
    }
    .mobile-bar .btn{flex:1;height:48px;border-radius:999px;padding:0 14px}
    .mobile-bar .top{
      width:48px;height:48px;flex:none;border-radius:999px;border:1px solid var(--line);
      display:flex;align-items:center;justify-content:center;color:var(--text);background:var(--bg-2);
    }
    body{padding-bottom:82px}
  }
  @media (max-width:767px){
    .shell{padding:0 16px}
    .article-head{padding-bottom:26px}
    .rel-grid{grid-template-columns:1fr}
    .nav-cards{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .article-body{font-size:16px}
    .category-cta{padding:24px;flex-direction:column;align-items:flex-start}
  }
  @media (max-width:520px){
    .brand{font-size:17px}
    .meta-row{gap:8px;font-size:12.5px}
    .tag{padding:5px 12px;font-size:12.5px}
    .block-head{flex-direction:column;align-items:flex-start;gap:8px}
  }

/* roulang page: category1 */
:root{
  --c-bg:#0B0F14;
  --c-surface:#121821;
  --c-panel:#0E141B;
  --c-card:#161D27;
  --c-elevated:#1C2531;
  --c-line:#232C3A;
  --c-line-soft:rgba(35,44,58,.6);
  --c-primary:#16E0A3;
  --c-primary-hover:#3AE9B4;
  --c-accent:#FF6B4A;
  --c-success:#31C48D;
  --c-warning:#F5A524;
  --c-error:#F05252;
  --c-text:#F2F6FA;
  --c-text-2:#A7B3C2;
  --c-text-3:#6C7A8C;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-glow:0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button,input{font-family:inherit}
button{cursor:pointer;background:none;border:0;color:inherit}
ul,ol{margin:0;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}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--c-bg)}
::-webkit-scrollbar-thumb{background:var(--c-line);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--c-primary)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,20,.94);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:0 10px 30px rgba(0,0,0,.35)}
.header-inner{display:flex;align-items:center;gap:22px;height:72px;position:relative}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:30px;height:30px;flex:0 0 auto}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--c-text);white-space:nowrap}
.logo-text span{color:var(--c-primary)}
.search-box{
  position:relative;display:flex;align-items:center;gap:10px;
  flex:1 1 auto;max-width:500px;height:44px;
  padding:0 10px 0 16px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(22,224,163,.25),0 0 24px rgba(22,224,163,.18)}
.search-box svg{flex:0 0 auto;color:var(--c-text-3)}
.search-input{
  flex:1 1 auto;min-width:0;height:100%;
  background:transparent;border:0;outline:none;
  color:var(--c-text);font-size:14px;
}
.search-input::placeholder{color:var(--c-text-3)}
.search-kbd{
  flex:0 0 auto;font-size:11.5px;color:var(--c-text-3);
  border:1px solid var(--c-line);border-radius:8px;
  padding:2px 8px;line-height:1.6;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  display:inline-block;padding:9px 14px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:500;color:var(--c-text-2);white-space:nowrap;
  transition:color .2s ease,background .2s ease,box-shadow .2s ease;
}
.nav-link:hover{color:var(--c-text);background:rgba(22,224,163,.08)}
.nav-link.active{color:var(--c-primary);background:rgba(22,224,163,.10);box-shadow:inset 0 0 0 1px rgba(22,224,163,.28)}
.nav-toggle,.search-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-text-2);
  transition:.2s;
}
.nav-toggle:hover,.search-toggle:hover{color:var(--c-primary);border-color:rgba(22,224,163,.4)}
.search-toggle{order:3}
.nav-toggle{order:4}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:var(--c-surface);padding:10px 0 16px}
.mobile-panel.is-open{display:block}
.mobile-panel .nav-link{display:block;padding:12px 16px;border-radius:12px}

/* ---------- 分类页 Hero ---------- */
.hero-cat{
  position:relative;min-height:280px;display:flex;align-items:center;
  padding:64px 0;overflow:hidden;border-bottom:1px solid var(--c-line-soft);
}
.hero-cat-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.28;
}
.hero-cat::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,15,20,.97) 0%,rgba(11,15,20,.86) 48%,rgba(11,15,20,.6) 100%);
}
.hero-cat-inner{position:relative;z-index:2;width:100%}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:20px}
.breadcrumb a{transition:color .2s}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb [aria-current]{color:var(--c-text-2)}
.hero-cat h1{
  font-size:clamp(30px,4.4vw,52px);
  font-weight:900;letter-spacing:-.01em;line-height:1.24;
  margin:14px 0 14px;
}
.hero-cat .lead{max-width:720px;color:var(--c-text-2);font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* ---------- 通用组件 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;line-height:1.6;color:var(--c-text-2);
  background:rgba(255,255,255,.04);border:1px solid var(--c-line);
  white-space:nowrap;
}
.badge-primary{color:var(--c-primary);border-color:rgba(22,224,163,.4);background:rgba(22,224,163,.08)}
.badge-accent{color:#FFB9A6;border-color:rgba(255,107,74,.45);background:rgba(255,107,74,.08)}
.time-chip{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--c-primary);
  background:rgba(22,224,163,.08);border:1px solid rgba(22,224,163,.3);
  font-variant-numeric:tabular-nums;white-space:nowrap;
}
.status{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  font-size:12px;border:1px solid transparent;white-space:nowrap;
}
.status-success{color:var(--c-success);background:rgba(49,196,141,.1);border-color:rgba(49,196,141,.35)}
.status-warn{color:var(--c-warning);background:rgba(245,165,36,.1);border-color:rgba(245,165,36,.35)}
.status-muted{color:var(--c-text-3);background:rgba(255,255,255,.03);border-color:var(--c-line)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease,box-shadow .2s ease;
}
.btn svg{flex:0 0 auto}
.btn-primary{background:var(--c-primary);color:#0B0F14}
.btn-primary:hover{background:var(--c-primary-hover);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;color:var(--c-text);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(22,224,163,.08);color:var(--c-primary);transform:translateY(-2px)}
.btn-ghost:active{transform:scale(.98)}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);font-size:14.5px;font-weight:600;white-space:nowrap}
.link-more svg{transition:transform .2s ease}
.link-more:hover svg{transform:translateX(4px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--c-primary);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-primary);border-radius:2px}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--c-panel);border-top:1px solid var(--c-line-soft);border-bottom:1px solid var(--c-line-soft)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:38px;flex-wrap:wrap}
.h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-top:10px}
.section-sub{color:var(--c-text-2);font-size:15px;margin-top:12px;max-width:660px}
.split{display:grid;grid-template-columns:1.5fr 1fr;gap:32px;align-items:start}
.feature-card{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.feature-card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-card),var(--sh-glow)}
.media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface)}
.media img{width:100%;height:100%;object-fit:cover}
.media-caption{font-size:12.5px;color:var(--c-text-3);margin-top:10px}
.feature-body{padding:26px}
.feature-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}
.feature-title{font-size:22px;font-weight:800;margin-bottom:12px}
.card-text{font-size:14.8px;color:var(--c-text-2);line-height:1.85}
.mini-list{margin-top:18px;display:grid;gap:10px}
.mini-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-text-2)}
.mini-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:3px;background:var(--c-primary);opacity:.85;
}
.open-list{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-card)}
.list-title{
  font-size:16px;font-weight:700;margin:0 0 12px;padding-bottom:14px;
  border-bottom:1px solid var(--c-line-soft);
}
.open-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:14px 12px;border-radius:14px;border:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.open-item:hover{background:rgba(255,255,255,.03);border-color:rgba(22,224,163,.28);transform:translateX(3px)}
.open-item + .open-item{margin-top:4px}
.item-title{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:4px}
.item-text{font-size:13.5px;color:var(--c-text-3);line-height:1.75}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-card);box-shadow:var(--sh-card)}
.table-wrap table{min-width:720px}
.table-wrap th{
  text-align:left;font-size:13px;font-weight:700;color:var(--c-text-3);
  letter-spacing:.04em;padding:16px 20px;border-bottom:1px solid var(--c-line);
  background:rgba(255,255,255,.015);
}
.table-wrap td{
  padding:16px 20px;border-bottom:1px solid var(--c-line-soft);
  font-size:14.5px;color:var(--c-text-2);
}
.table-wrap tbody tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.table-wrap tbody tr:last-child td{border-bottom:0}
.table-wrap tbody tr:hover td{background:rgba(22,224,163,.05);color:var(--c-text)}
.td-strong{color:var(--c-text);font-weight:600}

/* ---------- 准备清单卡片 ---------- */
.prep-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(266px,1fr));gap:24px}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-card),var(--sh-glow)}
.card-icon{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(22,224,163,.1);border:1px solid rgba(22,224,163,.28);
  color:var(--c-primary);
}
.card-title{font-size:18px;font-weight:700;margin:16px 0 10px}
.card:hover .card-title{color:var(--c-primary)}

/* ---------- 提醒方式 ---------- */
.remind{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.remind-media{
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  background:var(--c-card);box-shadow:var(--sh-card);
}
.remind-media .media{aspect-ratio:4/3}
.step-list{display:grid;gap:22px}
.step{display:flex;gap:16px;align-items:flex-start}
.step-num{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;color:var(--c-primary);
  background:rgba(22,224,163,.08);border:1px solid rgba(22,224,163,.28);
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:700;margin-bottom:6px}
.step p{font-size:14.5px;color:var(--c-text-2)}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.faq details{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq details:hover{border-color:rgba(22,224,163,.3)}
.faq details[open]{border-left:3px solid var(--c-primary);box-shadow:var(--sh-card)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:20px 24px;font-size:16px;font-weight:600;color:var(--c-text);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex:0 0 auto;color:var(--c-primary);font-size:22px;font-weight:400;
  line-height:1;transition:transform .2s ease;
}
.faq details[open] summary::after{content:"−"}
.faq-answer{padding:0 24px 22px;font-size:15px;color:var(--c-text-2);max-width:720px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-panel);
  border:1px solid var(--c-line);
  background:linear-gradient(135deg,rgba(22,224,163,.1) 0%,rgba(255,107,74,.06) 100%);
  padding:64px 44px;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 44px);
  mask-image:radial-gradient(circle at 50% 40%,#000 30%,transparent 78%);
}
.cta-band > *{position:relative;z-index:2}
.cta-title{font-size:clamp(24px,3vw,34px);font-weight:800}
.cta-text{color:var(--c-text-2);font-size:15.5px;margin:14px auto 0;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:28px}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:80;
  width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-card);border:1px solid var(--c-line);color:var(--c-primary);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,border-color .2s ease,box-shadow .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--c-primary);box-shadow:var(--sh-glow)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-surface);border-top:1px solid var(--c-line);
  padding:64px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-title{font-size:14px;font-weight:700;color:var(--c-text);margin:0 0 16px}
.footer-list{display:grid;gap:10px}
.footer-list a{font-size:14px;color:var(--c-text-2);transition:color .2s ease,text-decoration-color .2s ease;text-underline-offset:3px}
.footer-list a:hover{color:var(--c-primary);text-decoration:underline}
.footer-desc{font-size:14px;color:var(--c-text-3);line-height:1.85;max-width:340px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--c-line-soft);
  font-size:13px;color:var(--c-text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .header-inner{gap:14px;height:64px}
  .nav-toggle,.search-toggle{display:flex}
  .search-box{display:none}
  .search-box.is-open{
    display:flex;position:absolute;left:0;right:0;top:10px;
    max-width:none;z-index:70;height:46px;background:var(--c-elevated);
  }
  .split{grid-template-columns:1fr}
  .remind{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .hero-cat{min-height:auto;padding:52px 0}
}
@media (max-width:640px){
  .shell{padding:0 16px}
  .section{padding:48px 0}
  .section-head{margin-bottom:26px}
  .hero-cat{padding:40px 0}
  .hero-cat h1{margin:12px 0}
  .hero-actions .btn{flex:1 1 100%}
  .cta-band{padding:44px 20px}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .feature-body{padding:20px}
  .card{padding:22px}
  .open-list{padding:18px}
  .faq summary{padding:18px}
  .faq-answer{padding:0 18px 20px}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category2 */
:root{
    --brand:#16E0A3;
    --brand-2:#FF6B4A;
    --bg:#0B0F14;
    --surface:#121821;
    --card:#161D27;
    --elev:#1C2531;
    --line:#232C3A;
    --line-soft:rgba(35,44,58,.6);
    --text:#F2F6FA;
    --muted:#A7B3C2;
    --dim:#6C7A8C;
    --ok:#31C48D;
    --warn:#F5A524;
    --err:#F05252;
    --r-card:16px;
    --r-panel:20px;
    --r-btn:10px;
    --r-pill:999px;
    --sh-card:0 12px 32px rgba(0,0,0,.45);
    --sh-hover:0 12px 32px rgba(0,0,0,.45),0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18);
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.25}
  p{margin:0}
  ::selection{background:rgba(22,224,163,.3);color:#fff}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
  ::-webkit-scrollbar{width:12px;height:12px}
  ::-webkit-scrollbar-track{background:var(--bg)}
  ::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px;border:3px solid var(--bg)}
  ::-webkit-scrollbar-thumb:hover{background:var(--brand)}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

  /* ============ header ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(11,15,20,.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid transparent;
    transition:border-color .25s var(--ease),background .25s var(--ease);
  }
  .site-header.is-scrolled{border-bottom-color:var(--line-soft);background:rgba(11,15,20,.97)}
  .header-inner{display:flex;align-items:center;gap:22px;height:72px}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{width:30px;height:30px;flex:0 0 auto}
  .logo-text{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
  .logo-text span{color:var(--brand)}

  .nav-search{position:relative;flex:1 1 auto;max-width:400px;display:flex;align-items:center}
  .nav-search .search-icon{position:absolute;left:16px;width:18px;height:18px;color:var(--dim);pointer-events:none}
  .nav-search input{
    width:100%;height:44px;padding:0 86px 0 44px;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    background:var(--surface);
    color:var(--text);
    font-size:14px;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
  }
  .nav-search input::placeholder{color:var(--dim)}
  .nav-search input:focus{
    outline:none;
    border-color:var(--brand);
    background:var(--card);
    box-shadow:0 0 0 2px rgba(22,224,163,.26),0 0 18px rgba(22,224,163,.18);
  }
  .search-key{
    position:absolute;right:12px;
    font-size:11px;letter-spacing:.06em;color:var(--dim);
    border:1px solid var(--line);border-radius:999px;padding:2px 9px;
    pointer-events:none;
  }

  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-link{
    display:inline-block;padding:8px 12px;border-radius:999px;
    font-size:14.5px;color:var(--muted);white-space:nowrap;
    transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
  }
  .nav-link:hover{color:var(--text);background:rgba(22,224,163,.08)}
  .nav-link.active{color:var(--brand);background:rgba(22,224,163,.1);box-shadow:inset 0 0 0 1px rgba(22,224,163,.28)}

  .nav-actions{display:none;align-items:center;gap:8px;margin-left:auto}
  .icon-btn{
    width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
    border-radius:12px;border:1px solid var(--line);color:var(--muted);background:var(--surface);
    transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
  }
  .icon-btn:hover{color:var(--brand);border-color:rgba(22,224,163,.4);background:var(--card)}
  .icon-btn svg{width:19px;height:19px}

  .mobile-search,.mobile-menu{display:none}

  /* ============ hero ============ */
  .cat-hero{
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line-soft);
    background:linear-gradient(100deg,rgba(11,15,20,.97) 8%,rgba(11,15,20,.78) 55%,rgba(11,15,20,.6) 100%),
               url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  }
  .cat-hero::before{
    content:"";
    position:absolute;inset:0;
    background-image:linear-gradient(rgba(35,44,58,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(35,44,58,.5) 1px,transparent 1px);
    background-size:56px 56px;
    -webkit-mask-image:linear-gradient(120deg,#000,transparent 68%);
    mask-image:linear-gradient(120deg,#000,transparent 68%);
    opacity:.55;pointer-events:none;
  }
  .cat-hero-inner{position:relative;z-index:1;padding:52px 0 60px;max-width:900px}
  .crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13.5px;color:var(--dim)}
  .crumbs a{color:var(--muted)}
  .crumbs a:hover{color:var(--brand)}
  .crumbs .sep{color:var(--dim);opacity:.7}
  .crumbs .current{color:var(--muted)}
  .page-title{
    font-size:clamp(30px,3.6vw,44px);
    font-weight:900;
    line-height:1.22;
    margin:18px 0 14px;
    max-width:820px;
  }
  .page-title em{color:var(--brand);font-style:normal}
  .hero-note{color:var(--muted);font-size:16.5px;max-width:720px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .tag{
    display:inline-flex;align-items:center;gap:7px;
    padding:6px 14px;border-radius:var(--r-pill);
    border:1px solid var(--line);background:rgba(22,224,163,.06);
    font-size:13px;color:var(--muted);
  }
  .tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

  /* ============ sections ============ */
  .section{padding:88px 0}
  .section--alt{
    background:var(--surface);
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line-soft);
  }
  .section-head{max-width:740px;margin-bottom:40px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:9px;
    font-size:12.5px;font-weight:700;letter-spacing:.16em;
    color:var(--brand);text-transform:uppercase;
  }
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}
  .section-title{font-size:clamp(24px,2.8vw,34px);margin:14px 0 12px}
  .section-desc{color:var(--muted);font-size:16px}
  .section-foot{margin-top:36px;display:flex;flex-wrap:wrap;gap:16px;align-items:center}

  .grid{display:grid;gap:24px}
  .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}

  /* ============ cards ============ */
  .card{
    position:relative;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:24px;
    box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .card-icon{
    width:44px;height:44px;border-radius:12px;
    display:grid;place-items:center;margin-bottom:16px;
    background:rgba(22,224,163,.1);
    border:1px solid rgba(22,224,163,.24);
    color:var(--brand);
  }
  .card-icon svg{width:21px;height:21px}
  .card h3{font-size:19px;margin-bottom:10px}
  .card p{color:var(--muted);font-size:14.8px}
  .card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:var(--r-pill);
    font-size:12.5px;font-weight:600;
    border:1px solid rgba(22,224,163,.32);
    background:rgba(22,224,163,.1);
    color:var(--brand);
    white-space:nowrap;
  }
  .badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor}
  .badge--hot{color:var(--brand-2);border-color:rgba(255,107,74,.34);background:rgba(255,107,74,.1)}
  .badge--soon{color:var(--warn);border-color:rgba(245,165,36,.34);background:rgba(245,165,36,.1)}
  .badge--end{color:var(--dim);border-color:var(--line);background:rgba(108,122,140,.12)}

  /* ============ timeline ============ */
  .timeline{display:block}
  .tl-item{
    display:grid;
    grid-template-columns:132px minmax(0,1fr);
    gap:32px;
    position:relative;
    padding-bottom:32px;
  }
  .tl-item:last-child{padding-bottom:0}
  .tl-time{
    position:relative;
    text-align:right;
    padding-right:24px;
    font-size:14px;
    font-weight:700;
    color:var(--muted);
    line-height:1.6;
  }
  .tl-time::after{
    content:"";
    position:absolute;right:0;top:10px;bottom:-32px;width:1px;
    background:linear-gradient(var(--line),rgba(35,44,58,.35));
  }
  .tl-item:last-child .tl-time::after{display:none}
  .tl-dot{
    position:absolute;right:-5px;top:9px;
    width:11px;height:11px;border-radius:50%;
    background:var(--brand);
    box-shadow:0 0 0 4px rgba(22,224,163,.14);
  }
  .tl-dot--hot{background:var(--brand-2);box-shadow:0 0 0 4px rgba(255,107,74,.14)}
  .tl-dot--soon{background:var(--warn);box-shadow:0 0 0 4px rgba(245,165,36,.14)}
  .tl-dot--end{background:var(--dim);box-shadow:0 0 0 4px rgba(108,122,140,.14)}
  .tl-body{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:22px 24px;
    box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .tl-body:hover{transform:translateY(-2px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .tl-head{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:10px}
  .tl-head h3{font-size:19px}
  .tl-body p{color:var(--muted);font-size:14.8px}
  .tl-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
  .tl-points li{
    font-size:12.8px;color:var(--muted);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    padding:3px 11px;
    background:var(--surface);
  }

  /* ============ compare ============ */
  .compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .compare-col{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-panel);
    padding:28px;
    box-shadow:var(--sh-card);
  }
  .compare-col--hl{
    border-color:rgba(22,224,163,.42);
    box-shadow:0 12px 32px rgba(0,0,0,.45),0 0 0 1px rgba(22,224,163,.25),0 0 26px rgba(22,224,163,.14);
  }
  .compare-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px}
  .compare-head h3{font-size:20px}
  .check-list li{
    display:flex;gap:11px;align-items:flex-start;
    padding:10px 0;
    border-bottom:1px dashed var(--line-soft);
    color:var(--muted);font-size:15px;
  }
  .check-list li:last-child{border-bottom:0;padding-bottom:0}
  .check-list svg{flex:0 0 auto;width:18px;height:18px;margin-top:6px;color:var(--brand)}

  /* ============ steps ============ */
  .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
  .step{
    position:relative;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:24px;
    box-shadow:var(--sh-card);
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .step:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-hover)}
  .step-num{font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--brand)}
  .step h3{font-size:17px;margin:12px 0 8px}
  .step p{color:var(--muted);font-size:14.5px}

  /* ============ split + figure ============ */
  .split{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
  .figure{
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    background:var(--elev);
    box-shadow:var(--sh-card);
  }
  .figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .figcaption{
    padding:12px 18px;font-size:13px;color:var(--dim);
    border-top:1px solid var(--line-soft);background:var(--surface);
  }
  .mini-list{display:grid;gap:14px;margin-top:22px}
  .mini-list li{
    display:flex;gap:12px;align-items:flex-start;
    background:var(--card);border:1px solid var(--line);
    border-radius:14px;padding:14px 16px;
    color:var(--muted);font-size:14.8px;
    transition:border-color .2s var(--ease),transform .2s var(--ease);
  }
  .mini-list li:hover{border-color:rgba(22,224,163,.32);transform:translateX(3px)}
  .mini-list strong{color:var(--text);font-weight:700}
  .mini-list .mark{flex:0 0 auto;color:var(--brand);font-weight:800;line-height:1.7}

  /* ============ faq ============ */
  .faq{max-width:840px;margin:0 auto;display:grid;gap:14px}
  .faq-item{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .faq-item[open]{border-color:rgba(22,224,163,.4);box-shadow:0 12px 32px rgba(0,0,0,.4),0 0 20px rgba(22,224,163,.1)}
  .faq-q{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:18px 22px;
    font-size:16.5px;font-weight:600;
    cursor:pointer;list-style:none;
  }
  .faq-q::-webkit-details-marker{display:none}
  .faq-q::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
    border-radius:3px;background:var(--brand);opacity:0;transition:opacity .2s var(--ease);
  }
  .faq-item[open] .faq-q::before{opacity:1}
  .faq-icon{
    flex:0 0 auto;width:24px;height:24px;border-radius:50%;
    display:grid;place-items:center;
    border:1px solid var(--line);color:var(--brand);
    font-size:15px;line-height:1;
    transition:transform .25s var(--ease),border-color .2s var(--ease);
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(22,224,163,.5)}
  .faq-a{padding:0 22px 20px;color:var(--muted);font-size:15px;max-width:760px}

  /* ============ cta ============ */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-panel);
    border:1px solid rgba(22,224,163,.28);
    background:linear-gradient(115deg,rgba(22,224,163,.13),rgba(255,107,74,.08)),var(--surface);
    padding:56px 48px;
  }
  .cta-band::after{
    content:"";
    position:absolute;inset:0;
    background-image:linear-gradient(rgba(35,44,58,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(35,44,58,.55) 1px,transparent 1px);
    background-size:48px 48px;
    -webkit-mask-image:radial-gradient(circle at 88% 20%,#000,transparent 65%);
    mask-image:radial-gradient(circle at 88% 20%,#000,transparent 65%);
    opacity:.5;pointer-events:none;
  }
  .cta-inner{position:relative;z-index:1;max-width:720px}
  .cta-title{font-size:clamp(24px,2.8vw,32px);margin-bottom:14px}
  .cta-desc{color:var(--muted);font-size:16px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

  /* ============ buttons ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:9px;
    height:48px;padding:0 26px;border-radius:var(--r-btn);
    font-size:15.5px;font-weight:700;letter-spacing:.01em;
    transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .btn-primary{background:var(--brand);color:#0B0F14;box-shadow:0 10px 24px rgba(22,224,163,.22)}
  .btn-primary:hover{background:#3ceab5;transform:translateY(-2px)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{border:1px solid var(--line);color:var(--text)}
  .btn-ghost:hover{border-color:var(--brand);background:rgba(22,224,163,.08);color:var(--brand)}
  .btn-ghost:active{transform:scale(.98)}
  .btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px}
  .link-arrow{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-size:14.5px;font-weight:600}
  .link-arrow svg{width:16px;height:16px;transition:transform .2s var(--ease)}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* ============ footer ============ */
  .site-footer{
    background:var(--surface);
    border-top:1px solid var(--line-soft);
    padding:64px 0 28px;
  }
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-desc{color:var(--muted);font-size:14.5px;max-width:360px}
  .footer-title{font-size:15px;font-weight:700;margin-bottom:16px}
  .footer-list{display:grid;gap:10px}
  .footer-list a{color:var(--muted);font-size:14.5px}
  .footer-list a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
    margin-top:48px;padding-top:22px;
    border-top:1px solid var(--line-soft);
    color:var(--dim);font-size:13.5px;
  }

  /* ============ floating cta ============ */
  .float-cta{
    position:fixed;right:24px;bottom:28px;z-index:70;
    display:flex;flex-direction:column;align-items:flex-end;gap:12px;
    opacity:0;visibility:hidden;transform:translateY(14px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
  }
  .float-cta.is-visible{opacity:1;visibility:visible;transform:none}
  .float-btn{
    display:flex;align-items:center;justify-content:center;
    height:52px;min-width:52px;padding:0 15px;
    border-radius:var(--r-pill);
    background:var(--card);border:1px solid var(--line);color:var(--muted);
    box-shadow:var(--sh-card);overflow:hidden;
    transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
  }
  .float-btn svg{width:20px;height:20px;flex:0 0 auto}
  .float-btn .label{
    max-width:0;opacity:0;white-space:nowrap;
    font-size:14px;font-weight:700;color:#0B0F14;
    transition:max-width .3s var(--ease),opacity .2s var(--ease),margin .3s var(--ease);
  }
  .float-btn:hover{transform:translateY(-2px)}
  .float-btn--main{background:var(--brand);border-color:transparent;color:#0B0F14}
  .float-btn--main:hover{background:#3ceab5}
  .float-btn--main:hover .label{max-width:120px;opacity:1;margin-left:9px}
  .float-btn--top:hover{color:var(--brand);border-color:rgba(22,224,163,.45)}

  .mobile-cta{display:none}

  /* ============ responsive ============ */
  @media (max-width:1023px){
    .header-inner{height:64px;gap:12px}
    .header-inner .nav-search{display:none}
    .header-inner .nav-links{display:none}
    .nav-actions{display:flex}
    .mobile-menu{
      position:fixed;left:0;right:0;top:64px;z-index:59;
      flex-direction:column;gap:6px;
      padding:16px 20px 22px;
      background:rgba(11,15,20,.98);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .mobile-menu.is-open{display:flex}
    .mobile-link{
      padding:12px 14px;border-radius:12px;font-size:16px;color:var(--muted);
      border:1px solid transparent;
      transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
    }
    .mobile-link:hover{color:var(--text);background:rgba(22,224,163,.06)}
    .mobile-link.active{color:var(--brand);background:rgba(22,224,163,.1);border-color:rgba(22,224,163,.28)}
    .mobile-search{
      position:fixed;left:0;right:0;top:64px;z-index:61;
      padding:12px 20px 16px;
      background:rgba(11,15,20,.98);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .mobile-search.is-open{display:block}
    .mobile-search .nav-search{max-width:none;width:100%}
    .section{padding:72px 0}
    .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
    .split{grid-template-columns:1fr;gap:32px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .cat-hero-inner{padding:44px 0 52px}
  }

  @media (max-width:767px){
    .shell{padding:0 16px}
    .section{padding:56px 0}
    .section-head{margin-bottom:28px}
    .page-title{font-size:30px}
    .hero-note{font-size:15.5px}
    .tl-item{grid-template-columns:1fr;gap:12px}
    .tl-time{text-align:left;padding-right:0;font-size:13.5px}
    .tl-time::after,.tl-dot{display:none}
    .compare{grid-template-columns:1fr}
    .grid-2,.grid-3,.grid-4,.steps{grid-template-columns:1fr}
    .cta-band{padding:36px 24px}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .float-cta{display:none}
    .mobile-cta{
      position:fixed;left:0;right:0;bottom:0;z-index:75;
      display:flex;align-items:center;gap:12px;
      height:62px;padding:0 16px;
      background:rgba(11,15,20,.97);
      border-top:1px solid var(--line);
      backdrop-filter:blur(10px);
    }
    .mobile-cta .btn{flex:1 1 auto;height:44px;font-size:15px}
    .mobile-cta .icon-btn{flex:0 0 auto;width:44px;height:44px}
    body{padding-bottom:62px}
  }

  @media (max-width:520px){
    .card,.tl-body,.compare-col,.step{padding:20px}
    .footer-bottom{flex-direction:column;gap:8px}
  }

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

/* roulang page: category3 */
:root{
  --c-primary:#16E0A3;
  --c-primary-soft:rgba(22,224,163,.12);
  --c-accent:#FF6B4A;
  --bg:#0B0F14;
  --surface:#121821;
  --card:#161D27;
  --elevated:#1C2531;
  --border:#232C3A;
  --border-soft:rgba(35,44,58,.6);
  --text:#F2F6FA;
  --muted:#A7B3C2;
  --dim:#6C7A8C;
  --ok:#31C48D;
  --warn:#F5A524;
  --err:#F05252;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --sh-glow:0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,"Inter",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.32;letter-spacing:-.01em}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(22,224,163,.28);color:#fff}
::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#232C3A;border-radius:999px;border:3px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--c-primary)}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.hl{color:var(--c-primary)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,20,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:0 10px 28px rgba(0,0,0,.45)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:32px;height:32px;flex-shrink:0}
.logo-text{font-size:18px;font-weight:900;white-space:nowrap;letter-spacing:.01em}
.logo-text span{color:var(--c-primary)}
.nav-search{
  position:relative;flex:1 1 auto;max-width:520px;margin:0 auto;
  display:flex;align-items:center;gap:10px;height:44px;padding:0 16px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-pill);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18)}
.nav-search svg{width:18px;height:18px;color:var(--dim);flex-shrink:0}
.nav-search-input{flex:1;min-width:0;background:none;border:none;outline:none;font-size:14px;color:var(--text)}
.nav-search-input::placeholder{color:var(--dim)}
.nav-search-key{font-size:12px;color:var(--dim);border:1px solid var(--border);border-radius:var(--r-pill);padding:2px 8px;flex-shrink:0;line-height:1.6}
.nav-links{display:flex;align-items:center;gap:4px;flex-shrink:0}
.nav-link{position:relative;padding:8px 12px;font-size:15px;color:var(--muted);border-radius:var(--r-btn);white-space:nowrap;transition:color .2s ease,background .2s ease}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary)}
.nav-toggle,.nav-search-btn{
  display:none;width:42px;height:42px;border-radius:12px;align-items:center;justify-content:center;
  border:1px solid var(--border);background:var(--surface);color:var(--muted);flex-shrink:0;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.nav-toggle:hover,.nav-search-btn:hover{color:var(--c-primary);border-color:rgba(22,224,163,.45)}
.nav-toggle svg,.nav-search-btn svg{width:20px;height:20px}
.mobile-search{display:none;border-bottom:1px solid var(--border);background:var(--surface);padding:12px 0}
.mobile-search.is-open{display:block}
.mobile-search .nav-search{max-width:none;margin:0;display:flex}
.mobile-search .nav-search-key{display:none}

/* ---------- 分类首屏 ---------- */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);background:var(--bg)}
.cat-hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-1.webp");background-size:cover;background-position:center;opacity:.34}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,15,20,.97) 0%,rgba(11,15,20,.78) 52%,rgba(11,15,20,.94) 100%)}
.cat-hero .shell{position:relative;z-index:2;padding-top:42px;padding-bottom:48px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dim);margin-bottom:18px}
.crumbs a{color:var(--dim)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .sep{color:#3a4657;font-size:12px}
.crumbs .current{color:var(--muted)}
.cat-hero h1{font-size:clamp(28px,4.2vw,44px);font-weight:900}
.cat-hero-lead{max-width:720px;margin-top:16px;color:var(--muted);font-size:16px}
.cat-hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag-pill{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);border:1px solid var(--border);background:rgba(255,255,255,.02);border-radius:var(--r-pill);padding:6px 14px}
.tag-pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary)}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.08em;color:var(--c-primary);border:1px solid rgba(22,224,163,.35);background:var(--c-primary-soft);border-radius:var(--r-pill);padding:4px 12px;margin-bottom:16px}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:800}
.section-sub{color:var(--muted);font-size:15px;margin-top:12px;max-width:660px}
.rule{height:1px;background:var(--border-soft);border:none;margin:0}

/* ---------- 信息条 ---------- */
.info-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.info-card{
  position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--sh-card);overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.info-card::after{content:"";position:absolute;right:-16px;top:-16px;width:64px;height:64px;background:var(--c-primary);opacity:.07;clip-path:polygon(0 0,100% 0,100% 100%);border-radius:0 0 0 12px}
.info-card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-card),var(--sh-glow)}
.info-kicker{font-size:13px;color:var(--c-primary);font-weight:700;letter-spacing:.06em;margin-bottom:10px}
.info-card h3{font-size:17px;margin-bottom:8px}
.info-card p{font-size:14px;color:var(--muted);margin:0}

/* ---------- 筛选条 ---------- */
.filter-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  margin-bottom:32px;
}
.filter-tabs{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-pill);padding:7px 14px;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.chip:hover{color:var(--text);border-color:rgba(22,224,163,.45)}
.chip.is-active{color:#0B0F14;background:var(--c-primary);border-color:var(--c-primary);font-weight:700}
.filter-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.select-wrap{position:relative;display:inline-flex;align-items:center}
.select-wrap select{
  appearance:none;-webkit-appearance:none;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-pill);padding:9px 38px 9px 16px;font-size:13px;color:var(--muted);outline:none;cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.select-wrap select:hover,.select-wrap select:focus{border-color:rgba(22,224,163,.5);color:var(--text)}
.select-wrap svg{position:absolute;right:14px;top:50%;transform:translateY(-50%);width:14px;height:14px;color:var(--dim);pointer-events:none}
.view-switch{display:flex;gap:4px;padding:4px;background:var(--card);border:1px solid var(--border);border-radius:var(--r-pill)}
.view-switch button{width:34px;height:28px;display:grid;place-items:center;border-radius:var(--r-pill);color:var(--dim);transition:background .2s ease,color .2s ease}
.view-switch button svg{width:16px;height:16px}
.view-switch button:hover{color:var(--text)}
.view-switch button.is-active{background:rgba(22,224,163,.14);color:var(--c-primary)}

/* ---------- 攻略卡片网格 ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.guide-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.guide-card:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.35);box-shadow:var(--sh-card),var(--sh-glow)}
.guide-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface)}
.guide-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.guide-card:hover .guide-cover img{transform:scale(1.05)}
.guide-badge{
  position:absolute;left:12px;top:12px;font-size:12px;line-height:1.6;padding:3px 10px;border-radius:var(--r-pill);
  background:rgba(255,107,74,.18);border:1px solid rgba(255,107,74,.5);color:#FFB9A8;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.guide-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.guide-title{font-size:18px;font-weight:700;line-height:1.5;transition:color .2s ease}
.guide-card:hover .guide-title{color:var(--c-primary)}
.guide-desc{
  font-size:14px;color:var(--muted);line-height:1.85;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.guide-meta{
  margin-top:auto;display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--dim);
  padding-top:14px;border-top:1px dashed var(--border-soft);
}
.guide-meta .dot{width:4px;height:4px;border-radius:50%;background:#33405a}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media{position:relative;border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh-card)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-media figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:13px;color:var(--muted);background:linear-gradient(0deg,rgba(11,15,20,.92),rgba(11,15,20,0))}
.steps{display:flex;flex-direction:column;gap:0;margin-top:28px}
.step{position:relative;padding:0 0 28px 62px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:20px;top:38px;bottom:-4px;width:1px;background:linear-gradient(180deg,var(--border),transparent)}
.step:last-child::before{display:none}
.step-num{
  position:absolute;left:0;top:0;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--c-primary-soft);border:1px solid rgba(22,224,163,.35);color:var(--c-primary);
  font-weight:800;font-size:14px;letter-spacing:.02em;
}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted);margin:0}

/* ---------- 阶段对照 ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.compare-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);padding:26px 24px;
  box-shadow:var(--sh-card);position:relative;overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.compare-card:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.3);box-shadow:var(--sh-card),var(--sh-glow)}
.compare-card .stage-no{
  position:absolute;right:18px;top:6px;font-size:56px;font-weight:900;line-height:1.2;
  color:var(--c-primary);opacity:.12;letter-spacing:-.04em;
}
.compare-stage{font-size:13px;color:var(--c-accent);font-weight:700;letter-spacing:.06em;margin-bottom:10px}
.compare-card h3{font-size:19px;margin-bottom:14px}
.compare-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.compare-list li{position:relative;padding-left:22px;font-size:14px;color:var(--muted);line-height:1.8}
.compare-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:3px;background:var(--c-primary);opacity:.85}

/* ---------- FAQ ---------- */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;transition:border-color .25s ease}
.faq-item[open]{border-color:rgba(22,224,163,.42)}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;padding:18px 22px 18px 28px;font-weight:600;font-size:16px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--c-primary);transform:scaleY(0);transform-origin:top;transition:transform .25s ease;
}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-sign{
  width:26px;height:26px;flex-shrink:0;display:grid;place-items:center;border-radius:var(--r-pill);
  border:1px solid var(--border);color:var(--c-primary);transition:transform .25s ease,background .25s ease;
}
.faq-sign svg{width:14px;height:14px}
.faq-item[open] .faq-sign{transform:rotate(45deg);background:rgba(22,224,163,.12);border-color:rgba(22,224,163,.45)}
.faq-answer{padding:0 24px 22px 28px;font-size:14.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;padding:76px 0;text-align:center;
  background:linear-gradient(180deg,rgba(22,224,163,.11),rgba(22,224,163,.02));
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.cta-band::before{
  content:"";position:absolute;left:0;top:0;width:60%;height:100%;
  background-image:linear-gradient(rgba(22,224,163,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(22,224,163,.10) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:linear-gradient(120deg,#000,transparent 72%);
  mask-image:linear-gradient(120deg,#000,transparent 72%);
  pointer-events:none;
}
.cta-band .shell{position:relative;z-index:2}
.cta-title{font-size:clamp(24px,3.2vw,36px);font-weight:900;max-width:760px;margin:0 auto}
.cta-text{color:var(--muted);font-size:15.5px;max-width:660px;margin:18px auto 0}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:700;font-size:15px;padding:13px 26px;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--c-primary);color:#0B0F14}
.btn-primary:hover{background:#2ff0b2;transform:translateY(-2px);box-shadow:0 10px 26px rgba(22,224,163,.28)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--c-primary);background:rgba(22,224,163,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:scale(.98)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:80;display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .3s ease,transform .3s ease;
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-main{
  display:inline-flex;align-items:center;height:52px;max-width:52px;padding:0 15px;overflow:hidden;
  border-radius:var(--r-pill);background:var(--c-primary);color:#0B0F14;font-weight:800;font-size:14px;
  box-shadow:0 12px 28px rgba(22,224,163,.3);transition:max-width .3s ease,padding .3s ease,background .2s ease;
}
.float-main svg{width:20px;height:20px;flex-shrink:0}
.float-main span{white-space:nowrap;opacity:0;margin-left:0;transition:opacity .25s ease,margin-left .25s ease}
.float-main:hover{max-width:250px;padding:0 20px 0 15px;background:#2ff0b2}
.float-main:hover span{opacity:1;margin-left:10px}
.float-top{
  width:46px;height:46px;border-radius:var(--r-pill);background:var(--elevated);border:1px solid var(--border);
  display:grid;place-items:center;color:var(--muted);transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.float-top:hover{color:var(--c-primary);border-color:rgba(22,224,163,.5);transform:translateY(-2px)}
.float-top svg{width:18px;height:18px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A0E13;border-top:1px solid var(--border);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{color:var(--muted);font-size:14px;line-height:1.9;max-width:330px;margin:0}
.footer-title{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text)}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-list a{color:var(--muted);font-size:14px}
.footer-list a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--border);margin-top:48px;padding-top:22px;font-size:13px;color:var(--dim);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .shell{padding:0 20px}
  .nav-search{display:none}
  .nav-search-btn{display:inline-flex}
  .header-inner{height:64px;gap:14px}
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--surface);border-bottom:1px solid var(--border);padding:10px 20px 18px;
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:12px}
  .nav-link.active{background:rgba(22,224,163,.08)}
  .nav-link.active::after{display:none}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .info-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:32px}
  .compare-grid{grid-template-columns:1fr;gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .float-cta{
    left:0;right:0;bottom:0;flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:8px 16px;border-radius:0;background:rgba(11,15,20,.95);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--border);
  }
  .float-main{max-width:none;flex:1;justify-content:center;box-shadow:none}
  .float-main span{opacity:1;margin-left:10px}
  .float-top{width:auto;height:48px;padding:0 16px;border-radius:var(--r-pill)}
  html body{padding-bottom:66px}
}
@media (max-width:640px){
  .shell{padding:0 16px}
  .cat-hero .shell{padding-top:30px;padding-bottom:38px}
  .cat-hero-lead{font-size:15px}
  .section{padding:52px 0}
  .section-tight{padding:44px 0}
  .info-strip{grid-template-columns:1fr}
  .guide-grid{grid-template-columns:1fr}
  .section-head{margin-bottom:28px}
  .filter-bar{padding:14px}
  .filter-tools{width:100%;justify-content:space-between}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band{padding:56px 0}
  .step{padding-left:54px}
  .step-num{width:38px;height:38px;font-size:13px}
  .step::before{left:18px}
  .compare-card .stage-no{font-size:46px}
}

/* roulang page: category4 */
:root{
    --brand:#16E0A3;
    --brand-soft:rgba(22,224,163,.08);
    --accent:#FF6B4A;
    --accent-soft:rgba(255,107,74,.08);
    --bg:#0B0F14;
    --bg-2:#121821;
    --card:#161D27;
    --float:#1C2531;
    --line:#232C3A;
    --line-soft:rgba(35,44,58,.6);
    --text:#F2F6FA;
    --text-2:#A7B3C2;
    --text-3:#6C7A8C;
    --ok:#31C48D;
    --warn:#F5A524;
    --err:#F05252;
    --r-card:16px;
    --r-panel:20px;
    --r-btn:10px;
    --r-pill:999px;
    --sh-card:0 12px 32px rgba(0,0,0,.45);
    --sh-glow:0 0 0 1px rgba(22,224,163,.35),0 0 24px rgba(22,224,163,.18);
    --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-cn);
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    text-align:left;
  }
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;font-weight:800;color:var(--text);}
  p{margin:0 0 1.2em;}
  p:last-child{margin-bottom:0;}
  a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
  img{max-width:100%;display:block;border-style:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  button,input,select{font:inherit;color:inherit;}
  button{background:none;border:0;cursor:pointer;}
  figure{margin:0;}
  svg{display:block;}
  ::selection{background:rgba(22,224,163,.28);color:#fff;}

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

  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:var(--bg);}
  ::-webkit-scrollbar-thumb{background:#232C3A;border-radius:999px;}
  ::-webkit-scrollbar-thumb:hover{background:var(--brand);}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  @media (max-width:640px){ .shell{padding:0 16px;} }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(11,15,20,.86);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid transparent;
    transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .site-header.scrolled{
    background:rgba(11,15,20,.95);
    border-bottom-color:var(--line);
    box-shadow:0 10px 30px rgba(0,0,0,.45);
  }
  .header-inner{
    display:grid;
    grid-template-columns:auto minmax(0,1fr) auto auto;
    align-items:center;
    gap:24px;
    height:72px;
  }
  .logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .logo-mark{width:30px;height:30px;}
  .logo-text{font-size:18px;font-weight:800;white-space:nowrap;letter-spacing:-.01em;}
  .logo-text span{color:var(--brand);}

  .search-box{
    position:relative;
    display:flex;align-items:center;
    width:100%;max-width:520px;
    justify-self:center;
    height:44px;
    padding:0 12px 0 40px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    transition:border-color .22s ease,box-shadow .22s ease,background-color .22s ease;
  }
  .search-box .search-ico{position:absolute;left:14px;width:18px;height:18px;color:var(--text-3);transition:color .22s ease;}
  .search-box input{
    flex:1;height:100%;min-width:0;
    background:none;border:0;outline:none;
    font-size:14px;color:var(--text);
  }
  .search-box input::placeholder{color:var(--text-3);}
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(22,224,163,.22),0 0 22px rgba(22,224,163,.16);}
  .search-box:focus-within .search-ico{color:var(--brand);}
  .search-kbd{
    flex-shrink:0;
    font-size:11px;line-height:1;
    padding:5px 9px;margin-left:8px;
    color:var(--text-3);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
  }

  .nav-links{display:flex;align-items:center;gap:4px;}
  .nav-link{
    display:inline-block;
    padding:8px 13px;
    font-size:14px;
    color:var(--text-2);
    border:1px solid transparent;
    border-radius:var(--r-pill);
    white-space:nowrap;
    transition:color .2s ease,background-color .2s ease,border-color .2s ease;
  }
  .nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
  .nav-link.active{
    color:var(--brand);
    background:var(--brand-soft);
    border-color:rgba(22,224,163,.32);
  }

  .header-actions{display:none;align-items:center;gap:8px;}
  .icon-btn{
    display:flex;align-items:center;justify-content:center;
    width:42px;height:42px;
    color:var(--text-2);
    background:var(--card);
    border:1px solid var(--line);
    border-radius:12px;
    transition:color .2s ease,border-color .2s ease,background-color .2s ease;
  }
  .icon-btn:hover{color:var(--brand);border-color:rgba(22,224,163,.35);}

  .mobile-search{
    display:none;
    padding:12px 0 16px;
    border-top:1px solid var(--line);
  }
  .mobile-search.open{display:block;}
  .mobile-search .search-box{max-width:none;justify-self:stretch;}

  .mobile-nav{
    display:none;
    padding:8px 0 20px;
    border-top:1px solid var(--line);
  }
  .mobile-nav.open{display:block;}
  .mobile-nav .nav-link{display:block;padding:13px 14px;font-size:15px;border-radius:12px;margin-bottom:6px;}
  .mobile-nav .nav-link.active{background:var(--brand-soft);}

  @media (max-width:1023px){
    .header-inner{grid-template-columns:auto 1fr auto;height:64px;gap:12px;}
    .nav-links{display:none;}
    .search-box{display:none;}
    .header-actions{display:flex;justify-self:end;}
    .mobile-search .search-box{display:flex;}
  }

  /* ============ 内页横幅 ============ */
  .cat-hero{
    position:relative;
    padding:60px 0 56px;
    background:
      linear-gradient(115deg,rgba(11,15,20,.95) 0%,rgba(11,15,20,.78) 52%,rgba(11,15,20,.92) 100%),
      url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .cat-hero::after{
    content:"";
    position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
    background-size:52px 52px;
    -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.5),transparent 68%);
    mask-image:linear-gradient(to bottom,rgba(0,0,0,.5),transparent 68%);
  }
  .cat-hero .shell{position:relative;z-index:1;}

  .breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;}
  .breadcrumb a{color:var(--text-3);}
  .breadcrumb a:hover{color:var(--brand);}
  .breadcrumb .sep{color:#3A4553;}
  .breadcrumb .current{color:var(--text-2);}

  .cat-hero h1{font-size:clamp(30px,4.4vw,52px);font-weight:900;letter-spacing:-.02em;}
  .cat-hero h1 em{font-style:normal;color:var(--brand);}
  .hero-sub{margin-top:16px;max-width:660px;font-size:16px;color:var(--text-2);line-height:1.85;}

  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 13px;
    font-size:12.5px;line-height:1.5;
    color:var(--text-2);
    background:rgba(255,255,255,.03);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    white-space:nowrap;
  }
  .badge-brand{color:var(--brand);background:var(--brand-soft);border-color:rgba(22,224,163,.32);}
  .badge-accent{color:var(--accent);background:var(--accent-soft);border-color:rgba(255,107,74,.32);}
  .badge-ok{color:var(--ok);background:rgba(49,196,141,.08);border-color:rgba(49,196,141,.32);}

  /* ============ 通用板块 ============ */
  .section{padding:88px 0;}
  .section-tight{padding:64px 0;}
  @media (max-width:640px){
    .section{padding:52px 0;}
    .section-tight{padding:44px 0;}
  }
  .section-head{max-width:760px;margin-bottom:40px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
    color:var(--brand);
  }
  .eyebrow::before{content:"";width:18px;height:2px;background:var(--brand);border-radius:2px;}
  .section-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:800;margin-top:14px;}
  .section-head p{margin-top:14px;margin-bottom:0;color:var(--text-2);}

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

  /* ============ 双栏索引布局 ============ */
  .index-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 340px;
    gap:32px;
    align-items:start;
  }
  @media (max-width:1023px){
    .index-layout{grid-template-columns:1fr;gap:28px;}
  }

  .index-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
  }
  @media (max-width:640px){ .index-grid{grid-template-columns:1fr;gap:14px;} }

  .index-item{
    display:flex;gap:14px;
    padding:22px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .index-item:hover{
    transform:translateY(-3px);
    border-color:rgba(22,224,163,.35);
    box-shadow:var(--sh-card),var(--sh-glow);
  }
  .index-icon{
    flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    width:46px;height:46px;
    color:var(--brand);
    background:var(--brand-soft);
    border:1px solid rgba(22,224,163,.26);
    border-radius:14px;
    transition:background-color .25s ease;
  }
  .index-item:hover .index-icon{background:rgba(22,224,163,.15);}
  .index-item h3{font-size:17px;font-weight:700;transition:color .2s ease;}
  .index-item:hover h3{color:var(--brand);}
  .index-item p{margin:8px 0 0;font-size:14px;line-height:1.75;color:var(--text-2);}

  .sticky-card{
    position:sticky;top:96px;
    padding:26px;
    background:var(--float);
    border:1px solid var(--line);
    border-radius:var(--r-panel);
    box-shadow:var(--sh-card);
  }
  @media (max-width:1023px){ .sticky-card{position:static;} }
  .sticky-card h3{font-size:18px;font-weight:700;}
  .sticky-card .card-note{margin-top:12px;font-size:14px;line-height:1.8;color:var(--text-2);}

  .spec-list{margin-top:20px;}
  .spec-list li{
    display:flex;justify-content:space-between;gap:14px;
    padding:11px 0;
    font-size:14px;
    border-bottom:1px dashed var(--line-soft);
  }
  .spec-list li:last-child{border-bottom:0;}
  .spec-list .k{color:var(--text-2);}
  .spec-list .v{color:var(--text);font-weight:600;text-align:right;}

  .sticky-card figure{margin-top:20px;}
  .sticky-card .thumb-img{
    width:100%;aspect-ratio:16/9;object-fit:cover;
    border-radius:12px;border:1px solid var(--line);
  }
  .sticky-card figcaption{margin-top:8px;font-size:12.5px;color:var(--text-3);}

  .card-actions{display:flex;flex-direction:column;gap:10px;margin-top:22px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;
    font-size:15px;font-weight:600;
    border:1px solid transparent;
    border-radius:var(--r-btn);
    transition:transform .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
    cursor:pointer;
  }
  .btn svg{width:16px;height:16px;}
  .btn-primary{background:var(--brand);color:#0B0F14;}
  .btn-primary:hover{filter:brightness(1.07);transform:translateY(-2px);}
  .btn-primary:active{transform:scale(.98);}
  .btn-ghost{background:transparent;border-color:var(--line);color:var(--text);}
  .btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-block{width:100%;}
  .link-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--brand);
  }
  .link-more svg{width:15px;height:15px;transition:transform .2s ease;}
  .link-more:hover svg{transform:translateX(4px);}

  /* ============ 速览卡片 ============ */
  .card-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  @media (max-width:1023px){ .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (max-width:640px){ .card-grid-3{grid-template-columns:1fr;} }

  .feature-card{
    display:flex;flex-direction:column;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:var(--sh-card);
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .feature-card:hover{
    transform:translateY(-4px);
    border-color:rgba(22,224,163,.35);
    box-shadow:var(--sh-card),var(--sh-glow);
  }
  .feature-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);}
  .feature-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
  .feature-card:hover .thumb img{transform:scale(1.045);}
  .feature-card .thumb figcaption{
    position:absolute;left:12px;bottom:12px;
    padding:4px 11px;
    font-size:12px;color:#E9FBF4;
    background:rgba(11,15,20,.72);
    border:1px solid rgba(255,255,255,.12);
    border-radius:var(--r-pill);
    backdrop-filter:blur(6px);
  }
  .feature-card .body{padding:22px;display:flex;flex-direction:column;flex:1;}
  .feature-card h3{font-size:19px;font-weight:700;}
  .feature-card .body p{margin:10px 0 0;font-size:14.5px;line-height:1.8;color:var(--text-2);}
  .feature-card .body .link-more{margin-top:auto;padding-top:18px;}
  .feature-card:hover h3{color:var(--brand);}

  /* ============ 数据带 ============ */
  .stat-band{
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
    border-radius:var(--r-panel);
    overflow:hidden;
  }
  .stat-item{background:var(--bg-2);padding:30px 24px;}
  .stat-num{font-size:clamp(28px,3vw,38px);font-weight:800;color:var(--brand);letter-spacing:-.02em;line-height:1.1;}
  .stat-num small{font-size:15px;font-weight:600;color:var(--text-2);margin-left:6px;letter-spacing:0;}
  .stat-label{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.7;}
  @media (max-width:768px){ .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (max-width:480px){ .stat-band{grid-template-columns:1fr;} }

  /* ============ 流程条 ============ */
  .step-row{
    display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
  }
  @media (max-width:900px){ .step-row{grid-template-columns:1fr;gap:18px;} }
  .step-item{
    position:relative;
    padding:26px 24px 24px;
    background:var(--bg-2);
    border:1px solid var(--line);
    border-radius:var(--r-card);
  }
  .step-item .num{
    font-size:44px;font-weight:900;line-height:1;
    color:rgba(22,224,163,.15);
    letter-spacing:-.03em;
  }
  .step-item h3{margin-top:10px;font-size:18px;}
  .step-item p{margin:8px 0 0;font-size:14.5px;color:var(--text-2);}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:840px;margin:0 auto;}
  .faq-item{
    position:relative;
    margin-bottom:12px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    transition:border-color .25s ease,box-shadow .25s ease;
  }
  .faq-item::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
    background:var(--brand);
    transform:scaleY(0);transform-origin:top;
    transition:transform .28s ease;
  }
  .faq-item.open{border-color:rgba(22,224,163,.35);box-shadow:var(--sh-card),0 0 24px rgba(22,224,163,.1);}
  .faq-item.open::before{transform:scaleY(1);}
  .faq-q{
    width:100%;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;
    font-size:16px;font-weight:600;color:var(--text);text-align:left;
  }
  .faq-q .sign{
    flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    width:26px;height:26px;
    color:var(--brand);
    border:1px solid rgba(22,224,163,.3);
    border-radius:50%;
    transition:transform .28s ease,background-color .28s ease;
  }
  .faq-q .sign svg{width:13px;height:13px;}
  .faq-item.open .faq-q .sign{transform:rotate(45deg);background:var(--brand-soft);}
  .faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s ease;}
  .faq-item.open .faq-a{grid-template-rows:1fr;}
  .faq-a > div{overflow:hidden;}
  .faq-a p{padding:0 22px 22px;margin:0;font-size:15px;color:var(--text-2);}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;
    padding:56px 44px;
    background:
      radial-gradient(120% 140% at 100% 0%,rgba(22,224,163,.14),transparent 55%),
      linear-gradient(180deg,var(--bg-2),var(--card));
    border:1px solid var(--line);
    border-radius:var(--r-panel);
    overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
    background-size:44px 44px;
    -webkit-mask-image:linear-gradient(to right,rgba(0,0,0,.6),transparent 70%);
    mask-image:linear-gradient(to right,rgba(0,0,0,.6),transparent 70%);
  }
  .cta-band .cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.4fr) auto;gap:32px;align-items:center;}
  @media (max-width:900px){
    .cta-band{padding:40px 24px;}
    .cta-band .cta-inner{grid-template-columns:1fr;gap:24px;}
  }
  .cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;}
  .cta-band p{margin-top:14px;margin-bottom:0;color:var(--text-2);max-width:620px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--bg-2);
    border-top:1px solid var(--line);
    padding:64px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.7fr 1fr 1fr 1fr;
    gap:40px;
  }
  @media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr;gap:32px;} }
  @media (max-width:520px){ .footer-grid{grid-template-columns:1fr;gap:28px;} }

  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .footer-brand .logo-text{font-size:17px;}
  .footer-desc{margin:0;max-width:330px;font-size:14px;line-height:1.85;color:var(--text-2);}
  .footer-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;}
  .footer-list li{margin-bottom:10px;}
  .footer-list a{font-size:14px;color:var(--text-2);}
  .footer-list a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
  .footer-bottom{
    display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
    margin-top:48px;padding-top:22px;
    border-top:1px solid var(--line-soft);
    font-size:13px;color:var(--text-3);
  }

  /* ============ 浮动 CTA ============ */
  .float-cta{
    position:fixed;right:24px;bottom:28px;z-index:70;
    display:flex;flex-direction:column;gap:10px;
    opacity:0;transform:translateY(14px);pointer-events:none;
    transition:opacity .3s ease,transform .3s ease;
  }
  .float-cta.show{opacity:1;transform:none;pointer-events:auto;}
  .float-btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 18px;
    font-size:14px;font-weight:600;
    color:var(--text-2);
    background:var(--float);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    box-shadow:var(--sh-card);
    transition:color .2s ease,border-color .2s ease,filter .2s ease,transform .2s ease;
  }
  .float-btn:hover{color:var(--brand);border-color:rgba(22,224,163,.4);}
  .float-main{color:#0B0F14;background:var(--brand);border-color:transparent;}
  .float-main:hover{color:#0B0F14;filter:brightness(1.07);transform:translateY(-2px);}
  .float-main .label{max-width:0;overflow:hidden;white-space:nowrap;transition:max-width .3s ease;}
  .float-cta:hover .float-main .label{max-width:180px;}
  .float-top svg{width:17px;height:17px;}

  @media (max-width:640px){
    body{padding-bottom:78px;}
    .float-cta{
      left:0;right:0;bottom:0;
      flex-direction:row;gap:12px;
      padding:10px 16px;
      background:rgba(11,15,20,.96);
      border-top:1px solid var(--line);
      backdrop-filter:blur(12px);
      transform:translateY(100%);
    }
    .float-cta.show{transform:none;}
    .float-main{flex:1;height:52px;font-size:15px;}
    .float-main .label{max-width:none;}
    .float-top{width:52px;height:52px;padding:0;}
  }

  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important;}
  }