/* roulang page: index */
:root{
    --ink:#241A55;
    --nebula:#5B34C9;
    --star:#18C8C0;
    --glow:#F5A623;
    --bg:#F6F5FC;
    --surface:#FFFFFF;
    --line:#E7E4F5;
    --text:#1A1730;
    --text2:#5A5671;
    --text3:#8B87A3;
    --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
    --radius-lg:24px;
    --radius-md:16px;
    --shadow-card:0 8px 30px rgba(42,27,99,.08);
    --shadow-hover:0 16px 40px rgba(42,27,99,.14);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--text);
    background:var(--bg);
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  button{cursor:pointer;border:none;background:none}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--star);outline-offset:3px;border-radius:8px}
  ::selection{background:rgba(24,200,192,.25)}

  .container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
  @media (min-width:768px){.container{padding-left:24px;padding-right:24px}}

  h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:700;line-height:1.15;letter-spacing:-.01em}
  h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700;line-height:1.3}
  h3{font-size:1.15rem;font-weight:700;line-height:1.45}
  .txt-body{color:var(--text2);font-size:16px;line-height:1.85}
  .txt-sm{color:var(--text3);font-size:13.5px;line-height:1.7}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

  .section{padding:56px 0}
  @media (min-width:768px){.section{padding:80px 0}}
  .sec-head{margin-bottom:32px}
  @media (min-width:768px){.sec-head{margin-bottom:40px}}
  .sec-head h2{margin-top:10px}
  .sec-head p{margin-top:12px;max-width:640px;color:var(--text2)}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;letter-spacing:.14em;font-weight:600;
    color:var(--nebula);text-transform:uppercase;
  }
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad)}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 26px;border-radius:var(--radius-md);
    font-size:15px;font-weight:600;line-height:1;
    transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
    border:1px solid transparent;
  }
  .btn i{font-size:14px}
  .btn-grad{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(91,52,201,.28)}
  .btn-grad:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,52,201,.36)}
  .btn-grad:active{transform:translateY(0);box-shadow:0 8px 18px rgba(91,52,201,.3)}
  .btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-card)}
  .btn-ghost:hover{transform:translateY(-2px);border-color:var(--star);box-shadow:var(--shadow-hover);color:var(--nebula)}
  .btn-ghost:active{transform:translateY(0)}
  .btn:disabled,.btn[disabled]{opacity:.4;background:#C9C6DA;color:#fff;box-shadow:none;cursor:not-allowed}
  .btn-block{width:100%}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    font-size:12.5px;font-weight:600;line-height:1.5;
    background:rgba(24,200,192,.12);color:#0E7C77;
  }
  .badge i{font-size:12px}
  .badge-purple{background:rgba(91,52,201,.1);color:var(--nebula)}
  .badge-glow{background:rgba(245,166,35,.16);color:#9A6206}

  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--star)}

  /* ---------- header ---------- */
  .site-header{position:sticky;top:0;z-index:60;padding:12px 0;transition:padding .25s ease}
  .nav-panel{
    display:flex;align-items:center;gap:12px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:10px 14px;
    box-shadow:var(--shadow-card);
    transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
  }
  .site-header.is-scrolled .nav-panel{
    background:var(--ink);
    border-color:rgba(255,255,255,.1);
    box-shadow:0 14px 34px rgba(36,26,85,.32);
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:36px;height:36px;border-radius:12px;background:var(--grad);
    display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;
    box-shadow:0 6px 16px rgba(91,52,201,.3);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-name{font-size:16px;font-weight:700;color:var(--ink);transition:color .3s ease}
  .brand-sub{font-size:11px;color:var(--text3);letter-spacing:.08em;transition:color .3s ease}
  .site-header.is-scrolled .brand-name{color:#fff}
  .site-header.is-scrolled .brand-sub{color:rgba(255,255,255,.55)}

  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-item{
    display:flex;flex-direction:column;align-items:center;gap:1px;
    padding:7px 11px;border-radius:14px;
    font-size:12px;font-weight:500;color:var(--text2);
    transition:background .2s ease,color .2s ease,transform .2s ease;
    white-space:nowrap;
  }
  .nav-item i{font-size:15px;line-height:1}
  .nav-item:hover{background:rgba(24,200,192,.12);color:var(--nebula);transform:translateY(-2px)}
  .nav-item.active{background:rgba(24,200,192,.16);color:var(--nebula);font-weight:700}
  .site-header.is-scrolled .nav-item{color:rgba(255,255,255,.72)}
  .site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.18);color:#fff}
  .site-header.is-scrolled .nav-item.active{background:rgba(24,200,192,.22);color:#fff}

  .nav-cta{flex-shrink:0;padding:11px 20px;font-size:14px}
  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:14px;
    border:1px solid var(--line);background:#fff;color:var(--ink);
    align-items:center;justify-content:center;font-size:17px;margin-left:auto;
  }
  .site-header.is-scrolled .nav-toggle{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#fff}

  .mobile-drawer{
    overflow:hidden;max-height:0;opacity:0;
    transition:max-height .35s ease,opacity .3s ease,margin .3s ease;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);
  }
  .mobile-drawer.open{max-height:520px;opacity:1;margin-top:10px}
  .drawer-inner{padding:14px;display:grid;gap:8px}
  .drawer-link{
    display:flex;align-items:center;gap:12px;
    padding:12px 14px;border-radius:14px;font-size:14.5px;font-weight:600;color:var(--ink);
    background:var(--bg);transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .drawer-link i{width:18px;text-align:center;color:var(--nebula)}
  .drawer-link:hover,.drawer-link.active{background:rgba(24,200,192,.14);color:var(--nebula)}
  .drawer-link:active{transform:scale(.99)}

  /* ---------- hero ---------- */
  .hero{position:relative;padding:44px 0 56px;overflow:hidden}
  @media (min-width:768px){.hero{padding:64px 0 80px}}
  .hero-glow{
    position:absolute;inset:0;pointer-events:none;
    background:
      radial-gradient(620px 320px at 12% 8%, rgba(91,52,201,.16), transparent 70%),
      radial-gradient(520px 300px at 88% 82%, rgba(24,200,192,.16), transparent 72%);
  }
  .hero-grid{position:relative;display:grid;gap:36px}
  @media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:center}}
  .hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
  .hero-sub{margin-top:16px;font-size:17px;color:var(--text2);max-width:520px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

  .hero-visual{
    position:relative;border-radius:var(--radius-lg);overflow:hidden;
    min-height:340px;border:1px solid rgba(255,255,255,.16);
    background-image:linear-gradient(150deg,rgba(36,26,85,.92) 0%,rgba(91,52,201,.72) 48%,rgba(24,200,192,.62) 100%),url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    box-shadow:0 24px 60px rgba(36,26,85,.32);
    display:flex;flex-direction:column;justify-content:flex-end;
    padding:26px;
  }
  .hero-visual::before{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
    background-size:26px 26px;opacity:.28;
  }
  .hero-visual-title{position:relative;color:#fff;font-size:19px;font-weight:700;line-height:1.5}
  .hero-visual-desc{position:relative;color:rgba(255,255,255,.78);font-size:13.5px;margin-top:8px}
  .hero-stats{position:relative;display:grid;gap:10px;margin-top:20px}
  .hero-stat{
    display:flex;align-items:center;gap:12px;
    padding:12px 16px;border-radius:var(--radius-md);
    background:rgba(24,200,192,.16);
    border:1px solid rgba(24,200,192,.34);
    backdrop-filter:blur(2px);
  }
  .hero-stat i{color:#8CF3EC;font-size:17px;width:20px;text-align:center}
  .hero-stat-num{color:#fff;font-size:16px;font-weight:700}
  .hero-stat-label{color:rgba(255,255,255,.72);font-size:12.5px;margin-left:auto}

  /* ---------- quick entries ---------- */
  .quick-grid{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}
  @media (min-width:768px){.quick-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}}
  @media (min-width:1024px){.quick-grid{grid-template-columns:repeat(6,minmax(0,1fr))}}
  .quick-card{
    display:block;padding:20px 16px;border-radius:var(--radius-md);
    background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  }
  .quick-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--star)}
  .quick-icon{
    width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;
    background:rgba(24,200,192,.12);color:var(--nebula);font-size:17px;margin-bottom:14px;
    transition:background .24s ease,color .24s ease;
  }
  .quick-card:hover .quick-icon{background:var(--grad);color:#fff}
  .quick-card h3{font-size:15px;margin-bottom:6px}
  .quick-card p{font-size:13px;color:var(--text3);line-height:1.65}

  /* ---------- cms list ---------- */
  .cms-grid{display:grid;gap:20px;grid-template-columns:1fr}
  @media (min-width:640px){.cms-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.cms-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}}
  .cms-card{
    display:flex;flex-direction:column;overflow:hidden;
    border-radius:var(--radius-lg);background:#fff;border:1px solid var(--line);
    box-shadow:var(--shadow-card);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .cms-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--star)}
  .cms-thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--line)}
  .cms-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
  .cms-title{
    font-size:16.5px;font-weight:700;line-height:1.5;margin-top:12px;color:var(--ink);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
    transition:color .2s ease;
  }
  .cms-card:hover .cms-title{color:var(--nebula)}
  .cms-summary{
    margin-top:10px;font-size:13.5px;color:var(--text2);line-height:1.75;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .cms-foot{
    margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
    border-top:1px dashed var(--line);font-size:12.5px;color:var(--text3);
  }
  .cms-more{color:var(--nebula);font-weight:600;display:inline-flex;align-items:center;gap:5px}
  .cms-more i{font-size:11px;transition:transform .2s ease}
  .cms-card:hover .cms-more i{transform:translateX(3px)}
  .empty-state{
    grid-column:1/-1;text-align:center;padding:48px 24px;border-radius:var(--radius-lg);
    background:#fff;border:1px dashed var(--line);
  }
  .empty-orbit{
    width:64px;height:64px;margin:0 auto 18px;border-radius:50%;
    background:var(--grad);opacity:.9;position:relative;
  }
  .empty-orbit::after{
    content:"";position:absolute;inset:12px;border-radius:50%;
    border:2px dashed rgba(255,255,255,.65);
  }
  .empty-state h3{font-size:17px}
  .empty-state p{margin-top:8px;color:var(--text2);font-size:14px}
  .empty-state .btn{margin-top:20px}

  /* ---------- steps ---------- */
  .steps{display:grid;gap:20px}
  @media (min-width:900px){.steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:end}}
  .step-card{
    position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:26px 22px;box-shadow:var(--shadow-card);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .step-card:hover{box-shadow:var(--shadow-hover);border-color:var(--star)}
  @media (min-width:900px){
    .step-card:nth-child(2){transform:translateY(-16px)}
    .step-card:nth-child(3){transform:translateY(-32px)}
    .step-card:nth-child(2):hover{transform:translateY(-20px)}
    .step-card:nth-child(3):hover{transform:translateY(-36px)}
  }
  .step-num{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:14px;background:var(--grad);
    color:#fff;font-weight:700;font-size:15px;letter-spacing:.04em;
  }
  .step-card h3{margin-top:18px;font-size:17px}
  .step-card p{margin-top:10px;font-size:14px;color:var(--text2);line-height:1.8}
  .step-count{
    position:absolute;right:20px;bottom:20px;
    font-size:12px;font-weight:700;color:var(--nebula);
    background:rgba(91,52,201,.09);border-radius:999px;padding:3px 12px;
  }
  .step-list{margin-top:14px;display:grid;gap:8px}
  .step-list li{display:flex;gap:9px;font-size:13.5px;color:var(--text2);line-height:1.7}
  .step-list li i{color:var(--star);font-size:12px;margin-top:7px}

  /* ---------- compare table ---------- */
  .table-wrap{overflow-x:auto;border-radius:var(--radius-lg);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-card)}
  .compare{width:100%;min-width:760px;border-collapse:collapse;font-size:14px}
  .compare thead th{
    position:sticky;top:0;z-index:2;background:#fff;
    padding:20px 18px;text-align:left;vertical-align:top;
    border-bottom:1px solid var(--line);
  }
  .compare thead th:first-child{background:var(--bg)}
  .compare th .ver-name{font-size:15.5px;font-weight:700;color:var(--ink)}
  .compare th .ver-price{margin-top:6px;font-size:13px;color:var(--text3)}
  .compare td{padding:15px 18px;border-bottom:1px solid var(--line);color:var(--text2);line-height:1.7}
  .compare tbody tr:last-child td{border-bottom:none}
  .compare td:first-child{color:var(--ink);font-weight:600;background:var(--bg)}
  .compare .col-main{background:rgba(24,200,192,.08)}
  .compare thead th.col-main{background:rgba(24,200,192,.14)}
  .compare tbody tr:hover td{background:rgba(91,52,201,.04)}
  .compare tbody tr:hover td:first-child{background:rgba(91,52,201,.08)}
  .compare tbody tr:hover td.col-main{background:rgba(24,200,192,.14)}
  .tick{color:var(--star);font-size:14px;margin-right:7px}
  .cross{color:#C9C6DA;font-size:14px;margin-right:7px}
  .rec-flag{
    display:inline-block;margin-left:8px;padding:2px 9px;border-radius:999px;
    font-size:11px;font-weight:700;color:#fff;background:var(--grad);
  }

  /* ---------- countdown ---------- */
  .countdown-bar{
    display:flex;flex-direction:column;gap:20px;
    padding:24px;border-radius:var(--radius-lg);
    background:linear-gradient(120deg,#2A1B63 0%,#4A2AA8 55%,#241A55 100%);
    border:1px solid rgba(245,166,35,.28);
    box-shadow:0 20px 50px rgba(36,26,85,.28);
  }
  @media (min-width:900px){.countdown-bar{flex-direction:row;align-items:center;gap:28px;padding:26px 30px}}
  .countdown-clock{display:flex;gap:10px}
  .clock-cell{
    min-width:66px;padding:10px 8px;border-radius:14px;text-align:center;
    background:rgba(245,166,35,.16);border:1px solid rgba(245,166,35,.4);
  }
  .clock-num{font-size:24px;font-weight:700;color:#FFCB6B;font-variant-numeric:tabular-nums;line-height:1.2}
  .clock-label{font-size:11px;color:rgba(255,255,255,.6);margin-top:2px}
  .countdown-copy{flex:1}
  .countdown-copy h3{color:#fff;font-size:18px}
  .countdown-copy p{color:rgba(255,255,255,.72);font-size:13.5px;margin-top:8px}
  .countdown-bar .btn{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(24,200,192,.3)}
  .countdown-bar .btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(24,200,192,.4)}

  /* ---------- form ---------- */
  .form-panel{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
    box-shadow:var(--shadow-card);padding:26px;
  }
  @media (min-width:768px){.form-panel{padding:34px}}
  .form-grid{display:grid;gap:18px;grid-template-columns:1fr}
  @media (min-width:768px){.form-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  .field{display:flex;flex-direction:column;gap:8px}
  .field.full{grid-column:1/-1}
  .field label{font-size:13.5px;font-weight:600;color:var(--ink)}
  .field label span{color:var(--nebula)}
  .field input,.field select,.field textarea{
    width:100%;padding:13px 16px;border-radius:var(--radius-md);
    border:1px solid var(--line);background:#fff;font-size:14.5px;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .field textarea{min-height:118px;resize:vertical;line-height:1.7}
  .field input:hover,.field select:hover,.field textarea:hover{border-color:#CFC9EA}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--nebula);box-shadow:0 0 0 3px rgba(24,200,192,.2);
  }
  .form-note{margin-top:14px;font-size:12.5px;color:var(--text3)}
  .form-aside{
    background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:24px;display:grid;gap:16px;align-content:start;
  }
  .aside-row{display:flex;gap:12px;align-items:flex-start}
  .aside-row i{width:34px;height:34px;border-radius:12px;background:#fff;border:1px solid var(--line);color:var(--nebula);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
  .aside-row h4{font-size:14px;font-weight:700}
  .aside-row p{font-size:13px;color:var(--text2);margin-top:2px}

  /* ---------- faq ---------- */
  .faq-list{display:grid;gap:12px}
  .faq{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
    overflow:hidden;transition:border-color .2s ease,background .2s ease;
  }
  .faq[open]{background:var(--bg);border-color:var(--star)}
  .faq summary{
    list-style:none;cursor:pointer;padding:18px 20px;
    display:flex;align-items:center;gap:16px;
    font-size:15.5px;font-weight:600;color:var(--ink);
  }
  .faq summary::-webkit-details-marker{display:none}
  .faq summary .q{flex:1;line-height:1.6}
  .faq summary .plus{
    width:24px;height:24px;flex-shrink:0;color:var(--nebula);font-size:18px;line-height:1;
    display:flex;align-items:center;justify-content:center;
    transition:transform .25s ease;
  }
  .faq[open] summary .plus{transform:rotate(45deg)}
  .faq .answer{padding:0 20px 20px;font-size:14.5px;color:var(--text2);line-height:1.9}

  /* ---------- cta strip ---------- */
  .cta-strip{
    position:relative;overflow:hidden;border-radius:var(--radius-lg);
    padding:34px 26px;color:#fff;
    background-image:linear-gradient(120deg,rgba(42,27,99,.94) 0%,rgba(91,52,201,.86) 52%,rgba(24,200,192,.8) 100%),url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
    box-shadow:0 22px 54px rgba(36,26,85,.28);
    display:flex;flex-direction:column;gap:22px;
  }
  @media (min-width:900px){.cta-strip{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 44px}}
  .cta-strip h2{color:#fff;font-size:clamp(1.35rem,2.6vw,1.85rem)}
  .cta-strip p{color:rgba(255,255,255,.78);margin-top:10px;font-size:14.5px;max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex-shrink:0}
  .cta-strip .btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34);box-shadow:none}
  .cta-strip .btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;border-color:#fff}

  /* ---------- footer ---------- */
  .site-footer{
    position:relative;margin-top:40px;background:var(--ink);color:rgba(255,255,255,.72);padding:0 0 28px;
  }
  .footer-bar{height:4px;background:var(--grad)}
  .footer-grid{display:grid;gap:30px;padding:44px 0 30px;grid-template-columns:1fr}
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-brand .brand-mark{box-shadow:none}
  .footer-brand span{color:#fff;font-weight:700;font-size:16px}
  .footer-about{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px}
  .footer-col h4{color:#fff;font-size:14.5px;margin-bottom:16px;font-weight:700}
  .footer-links{display:grid;gap:10px}
  .footer-links a{font-size:13.5px;color:rgba(255,255,255,.68);transition:color .2s ease,transform .2s ease;display:inline-block}
  .footer-links a:hover{color:var(--star);transform:translateX(3px)}
  .footer-contact li{display:flex;gap:10px;font-size:13.5px;margin-bottom:12px;line-height:1.7}
  .footer-contact i{color:var(--star);margin-top:5px;width:15px}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);padding-top:22px;
    display:flex;flex-direction:column;gap:10px;font-size:12.5px;color:rgba(255,255,255,.5);
  }
  @media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

  /* ---------- mobile action bar ---------- */
  .mobile-action{
    position:fixed;left:0;right:0;bottom:0;z-index:70;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    box-shadow:0 -8px 26px rgba(42,27,99,.12);
  }
  @media (min-width:768px){.mobile-action{display:none}}
  .mobile-action .btn{width:100%}
  body{padding-bottom:0}
  @media (max-width:767px){body{padding-bottom:74px}}

  @media (max-width:1023px){
    .nav-links,.nav-cta{display:none}
    .nav-toggle{display:flex}
  }
  @media (min-width:1024px){
    .mobile-drawer{display:none}
  }

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

/* roulang page: article */
:root{
    --ink:#241A55;
    --nebula:#5B34C9;
    --star:#18C8C0;
    --glow:#F5A623;
    --bg:#F6F5FC;
    --surface:#FFFFFF;
    --line:#E7E4F5;
    --text:#1A1730;
    --text-2:#5A5671;
    --text-3:#8B87A3;
    --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
    --shadow-1:0 8px 30px rgba(42,27,99,.08);
    --shadow-2:0 16px 40px rgba(42,27,99,.14);
    --r-lg:24px;
    --r-md:16px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  .num,.tabular{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
    outline:2px solid var(--star);
    outline-offset:2px;
    border-radius:8px;
  }

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:768px){.container{padding:0 24px}}

  /* ---------- 顶部阅读进度 ---------- */
  .read-progress{
    position:fixed;top:0;left:0;height:3px;width:0;
    background:var(--grad);z-index:80;transition:width .12s linear;
  }

  /* ---------- 导航 ---------- */
  .site-header{position:sticky;top:0;z-index:60;padding:14px 0 0;transition:padding .25s ease}
  .site-header.is-scrolled{padding-top:8px}
  .nav-panel{
    position:relative;
    display:flex;align-items:center;gap:12px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-1);
    padding:10px 12px;
    transition:background .3s ease,box-shadow .3s ease,border-color .3s ease,color .3s ease;
  }
  .site-header.is-scrolled .nav-panel{
    background:var(--ink);
    border-color:rgba(255,255,255,.12);
    box-shadow:0 14px 34px rgba(20,14,48,.28);
    color:#fff;
  }
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;padding:4px 6px}
  .brand-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:12px;
    background:var(--grad);color:#fff;font-size:15px;
    box-shadow:0 6px 16px rgba(91,52,201,.35);
  }
  .brand-text{font-weight:700;font-size:16px;letter-spacing:.4px;white-space:nowrap}

  .nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:nowrap}
  .nav-item{
    display:inline-flex;align-items:center;gap:6px;
    padding:8px 12px;border-radius:14px;
    font-size:14px;color:var(--text-2);white-space:nowrap;
    transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .nav-item i{font-size:13px;opacity:.85}
  .nav-item:hover{background:rgba(24,200,192,.12);color:var(--ink);transform:translateY(-2px)}
  .nav-item.active{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(91,52,201,.28)}
  .site-header.is-scrolled .nav-item{color:rgba(255,255,255,.76)}
  .site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.18);color:#fff}
  .site-header.is-scrolled .nav-item.active{background:var(--grad);color:#fff}

  .nav-cta{display:flex;align-items:center;gap:8px;flex-shrink:0}
  .nav-toggle{
    display:none;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:14px;
    border:1px solid var(--line);color:var(--ink);
    background:transparent;transition:background .2s ease,color .2s ease;
  }
  .nav-toggle:hover{background:rgba(24,200,192,.14)}
  .site-header.is-scrolled .nav-toggle{border-color:rgba(255,255,255,.22);color:#fff}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;border-radius:var(--r-md);
    font-size:14px;font-weight:600;letter-spacing:.3px;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
    border:1px solid transparent;
  }
  .btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(91,52,201,.28)}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,52,201,.36)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(91,52,201,.3)}
  .btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-1)}
  .btn-ghost:hover{transform:translateY(-2px);border-color:var(--star);box-shadow:var(--shadow-2)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{padding:9px 16px;font-size:13px;border-radius:14px}
  .btn-block{width:100%}

  /* ---------- 文章头部 ---------- */
  .article-hero{
    position:relative;
    margin-top:22px;
    border-radius:var(--r-lg);
    overflow:hidden;
    background-image:linear-gradient(120deg,rgba(36,26,85,.95) 0%,rgba(58,33,130,.88) 52%,rgba(24,200,192,.62) 100%),url('/assets/images/backpic/back-2.webp');
    background-size:cover;
    background-position:center;
    color:#fff;
    padding:38px 26px 34px;
    box-shadow:var(--shadow-1);
  }
  @media (min-width:768px){.article-hero{padding:52px 46px 46px;margin-top:26px}}
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:22px}
  .crumb a{transition:color .2s ease}
  .crumb a:hover{color:var(--star)}
  .crumb .sep{opacity:.5}
  .crumb .current{color:#fff;font-weight:600}

  .cat-chip{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 14px;border-radius:999px;
    background:rgba(24,200,192,.2);
    border:1px solid rgba(24,200,192,.5);
    color:#8FF3EE;font-size:13px;font-weight:600;
    margin-bottom:18px;
  }
  .page-title{
    font-size:clamp(1.75rem,4.4vw,3rem);
    font-weight:700;line-height:1.2;
    letter-spacing:.5px;
    max-width:900px;
  }
  .hero-sub{margin-top:14px;font-size:15px;color:rgba(255,255,255,.78);max-width:720px;line-height:1.8}

  .meta-bar{
    display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
    margin-top:26px;padding-top:20px;
    border-top:1px solid rgba(255,255,255,.16);
    font-size:13px;color:rgba(255,255,255,.78);
  }
  .meta-item{display:inline-flex;align-items:center;gap:7px}
  .meta-item i{color:var(--star)}
  .meta-divider{width:1px;height:14px;background:rgba(255,255,255,.22)}

  /* ---------- 正文区 ---------- */
  .article-section{padding:40px 0 20px}
  @media (min-width:768px){.article-section{padding:56px 0 24px}}
  .article-layout{display:grid;grid-template-columns:1fr;gap:26px}
  @media (min-width:1024px){
    .article-layout{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:34px;align-items:start}
  }

  .article-main{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-1);
    padding:26px 20px 30px;
  }
  @media (min-width:768px){.article-main{padding:40px 44px 44px}}

  .article-body{font-size:16px;line-height:1.9;color:var(--text-2)}
  .article-body > *:first-child{margin-top:0}
  .article-body h2{
    position:relative;
    font-size:clamp(1.3rem,2.4vw,1.6rem);
    font-weight:700;color:var(--text);line-height:1.4;
    margin:42px 0 16px;padding-left:16px;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.3em;
    width:4px;height:1.05em;border-radius:4px;background:var(--star);
  }
  .article-body h3{font-size:1.125rem;font-weight:700;color:var(--text);margin:28px 0 12px;line-height:1.6}
  .article-body p{margin:0 0 18px}
  .article-body strong{color:var(--text)}
  .article-body a{color:var(--nebula);border-bottom:1px solid rgba(91,52,201,.32);transition:color .2s ease,border-color .2s ease}
  .article-body a:hover{color:var(--star);border-color:var(--star)}
  .article-body blockquote{
    margin:26px 0;padding:16px 22px;
    background:#F1EEFB;border-left:4px solid var(--nebula);
    border-radius:0 16px 16px 0;color:var(--text);font-size:15px;
  }
  .article-body ul{margin:0 0 20px;padding-left:6px}
  .article-body ul li{position:relative;padding-left:20px;margin-bottom:9px}
  .article-body ul li::before{
    content:"";position:absolute;left:0;top:.75em;
    width:6px;height:6px;border-radius:50%;background:var(--star);
  }
  .article-body ol{margin:0 0 20px;padding-left:22px;list-style:decimal}
  .article-body ol li{margin-bottom:9px;padding-left:4px}
  .article-body img{border-radius:16px;margin:24px auto;box-shadow:var(--shadow-1)}
  .article-body figure{margin:26px 0}
  .article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;line-height:1.7}
  .article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;overflow:hidden;border-radius:14px}
  .article-body th,.article-body td{border-bottom:1px solid var(--line);padding:11px 14px;text-align:left}
  .article-body th{background:var(--bg);color:var(--text);font-weight:600}
  .article-body tr:last-child td{border-bottom:0}
  .article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}
  .article-body code{background:#F1EEFB;color:var(--nebula);padding:2px 7px;border-radius:8px;font-size:14px}

  .article-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

  /* ---------- 目录 ---------- */
  .article-side{display:none}
  @media (min-width:1024px){
    .article-side{display:block;position:sticky;top:104px}
  }
  .toc-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-1);
    padding:22px 20px;
  }
  .toc-title{
    display:flex;align-items:center;gap:8px;
    font-size:14px;font-weight:700;color:var(--text);
    padding-bottom:12px;margin-bottom:10px;
    border-bottom:1px solid var(--line);
  }
  .toc-title i{color:var(--star)}
  .toc-nav{display:flex;flex-direction:column;gap:2px;max-height:60vh;overflow-y:auto}
  .toc-nav a{
    display:block;padding:7px 10px;border-radius:12px;
    font-size:13.5px;color:var(--text-2);line-height:1.6;
    border-left:2px solid transparent;
    transition:background .2s ease,color .2s ease,border-color .2s ease;
  }
  .toc-nav a:hover{background:rgba(24,200,192,.12);color:var(--ink)}
  .toc-nav a.is-active{background:rgba(91,52,201,.08);color:var(--nebula);border-left-color:var(--nebula);font-weight:600}
  .side-card{
    margin-top:18px;border-radius:var(--r-lg);padding:22px 20px;
    background:var(--ink);color:#fff;box-shadow:var(--shadow-1);
  }
  .side-card h3{font-size:15px;font-weight:700;margin-bottom:8px}
  .side-card p{font-size:13.5px;color:rgba(255,255,255,.76);line-height:1.8;margin-bottom:16px}

  /* ---------- 标签行 ---------- */
  .tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
  .tag-row .tag-label{font-size:13px;color:var(--text-3);margin-right:2px}
  .tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:6px 14px;border-radius:999px;
    background:var(--bg);border:1px solid var(--line);
    font-size:13px;color:var(--text-2);
    transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  }
  .tag:hover{background:rgba(24,200,192,.14);border-color:var(--star);color:var(--ink);transform:translateY(-2px)}

  /* ---------- 空态 ---------- */
  .article-empty{
    text-align:center;padding:56px 20px;border-radius:var(--r-lg);
    background:var(--bg);border:1px dashed var(--line);
  }
  .article-empty i{font-size:32px;color:var(--star);margin-bottom:14px;display:block}
  .article-empty h2{font-size:1.15rem;color:var(--text);margin-bottom:8px}
  .article-empty p{font-size:14px;color:var(--text-2);margin-bottom:20px}

  /* ---------- 相关推荐 ---------- */
  .section{padding:34px 0}
  @media (min-width:768px){.section{padding:48px 0}}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:24px}
  .section-head h2{font-size:clamp(1.3rem,2.6vw,1.75rem);font-weight:700;color:var(--text);line-height:1.35}
  .section-head .kicker{
    display:inline-block;font-size:13px;font-weight:600;color:var(--nebula);
    background:rgba(91,52,201,.09);border-radius:999px;padding:4px 12px;margin-bottom:10px;
  }
  .section-head p{font-size:14px;color:var(--text-3);margin-top:8px}

  .rel-grid{display:grid;grid-template-columns:1fr;gap:16px}
  @media (min-width:768px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}}
  .rel-card{
    display:flex;gap:14px;align-items:center;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-md);padding:14px;
    box-shadow:var(--shadow-1);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--star)}
  .rel-card img{width:88px;height:66px;object-fit:cover;border-radius:12px;flex-shrink:0}
  .rel-body{min-width:0}
  .rel-body .mini-tag{font-size:12px;color:var(--star);font-weight:600}
  .rel-body h3{font-size:15px;font-weight:700;color:var(--text);line-height:1.5;margin:4px 0 4px;transition:color .2s ease}
  .rel-card:hover .rel-body h3{color:var(--nebula)}
  .rel-body p{font-size:13px;color:var(--text-3);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

  /* ---------- 底部 CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    border-radius:var(--r-lg);
    background-image:linear-gradient(120deg,rgba(36,26,85,.96) 0%,rgba(91,52,201,.86) 58%,rgba(24,200,192,.6) 100%),url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    color:#fff;padding:34px 24px;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
    box-shadow:var(--shadow-1);
  }
  @media (min-width:768px){.cta-band{padding:44px 46px}}
  .cta-band h2{font-size:clamp(1.25rem,2.6vw,1.7rem);font-weight:700;line-height:1.4}
  .cta-band p{font-size:14px;color:rgba(255,255,255,.78);margin-top:10px;max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:#fff;margin-top:56px;position:relative}
  .footer-bar{height:4px;background:var(--grad)}
  .footer-grid{
    display:grid;grid-template-columns:1fr;gap:30px;
    padding:48px 0 26px;
  }
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding:60px 0 30px}}
  .footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:14px}
  .footer-about{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.68);max-width:420px}
  .footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.5px}
  .footer-links{display:flex;flex-direction:column;gap:11px}
  .footer-links a{font-size:13.5px;color:rgba(255,255,255,.68);transition:color .2s ease,transform .2s ease}
  .footer-links a:hover{color:var(--star)}
  .footer-contact{display:flex;flex-direction:column;gap:12px;font-size:13.5px;color:rgba(255,255,255,.68)}
  .footer-contact li{display:flex;align-items:flex-start;gap:9px;line-height:1.7}
  .footer-contact i{color:var(--star);margin-top:4px;font-size:13px}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
    border-top:1px solid rgba(255,255,255,.12);
    padding:20px 0 28px;font-size:13px;color:rgba(255,255,255,.6);
  }

  /* ---------- 移动端底部操作条 ---------- */
  .mobile-bar{
    position:fixed;bottom:0;left:0;right:0;z-index:70;
    display:flex;align-items:center;gap:12px;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    box-shadow:0 -6px 24px rgba(42,27,99,.1);
  }
  .mobile-bar span{font-size:13px;color:var(--text-2);flex:1;min-width:0}
  @media (min-width:768px){.mobile-bar{display:none}}
  body{padding-bottom:76px}
  @media (min-width:768px){body{padding-bottom:0}}

  /* ---------- 移动端导航 ---------- */
  @media (max-width:1023px){
    .nav-toggle{display:inline-flex}
    .nav-links{
      position:absolute;top:calc(100% + 10px);left:0;right:0;
      flex-direction:column;align-items:stretch;gap:4px;
      margin:0;padding:10px;
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--shadow-2);
      max-height:72vh;overflow-y:auto;
      display:none;
    }
    .nav-links.open{display:flex}
    .nav-links .nav-item{justify-content:flex-start;color:var(--text-2)}
    .nav-links .nav-item.active{color:#fff}
    .nav-cta .btn-primary{display:none}
  }
  @media (max-width:520px){
    .brand-text{font-size:15px}
    .article-hero{padding:28px 18px 26px}
    .article-main{padding:22px 16px 26px}
    .cta-band{padding:28px 18px}
  }

  .pagination-hidden{display:none}

/* roulang page: category1 */
:root{
  --ink:#241A55;
  --ink-deep:#2A1B63;
  --nebula:#5B34C9;
  --star:#18C8C0;
  --glow:#F5A623;
  --bg:#F6F5FC;
  --surface:#FFFFFF;
  --line:#E7E4F5;
  --t1:#1A1730;
  --t2:#5A5671;
  --t3:#8B87A3;
  --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
  --r-lg:24px;
  --r-md:16px;
  --sh:0 8px 30px rgba(42,27,99,0.08);
  --sh-h:0 16px 40px rgba(42,27,99,0.14);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(91,52,201,.10) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.5;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
  position:relative;
  z-index:1;
}
@media (min-width:768px){
  .container{padding-left:24px;padding-right:24px}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding-top:12px;
}
.nav-panel{
  display:flex;
  align-items:center;
  gap:14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh);
  padding:10px 14px;
  transition:background .3s var(--ease),border-color .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled .nav-panel{
  background:var(--ink);
  border-color:rgba(255,255,255,.14);
  box-shadow:0 16px 40px rgba(36,26,85,.28);
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:16px;
  color:var(--ink);
  white-space:nowrap;
  transition:color .3s var(--ease);
}
.site-header.is-scrolled .brand{color:#fff}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:12px;
  background:var(--grad);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  box-shadow:0 6px 16px rgba(91,52,201,.3);
  flex:0 0 auto;
}
.brand-text{letter-spacing:.01em}
.nav-links{
  display:none;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
@media (min-width:1024px){
  .nav-links{display:flex}
}
.nav-item{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 13px;
  border-radius:14px;
  font-size:14px;
  font-weight:500;
  color:var(--t2);
  white-space:nowrap;
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.nav-item i{font-size:13px;opacity:.85}
.nav-item:hover{
  background:rgba(24,200,192,.12);
  color:var(--nebula);
  transform:translateY(-2px);
}
.nav-item:focus-visible{
  outline:2px solid var(--star);
  outline-offset:2px;
}
.nav-item.active{
  background:rgba(24,200,192,.14);
  color:var(--nebula);
  font-weight:700;
}
.site-header.is-scrolled .nav-item{color:rgba(255,255,255,.8)}
.site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.18);color:#fff}
.site-header.is-scrolled .nav-item.active{background:rgba(24,200,192,.22);color:#fff}
.nav-cta{margin-left:auto;display:none}
@media (min-width:1024px){
  .nav-cta{margin-left:8px;display:block}
}
.nav-toggle{
  margin-left:auto;
  width:42px;
  height:42px;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--bg);
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.nav-toggle:hover{background:rgba(24,200,192,.14);border-color:var(--star)}
.nav-toggle:focus-visible{outline:2px solid var(--star);outline-offset:2px}
@media (min-width:1024px){
  .nav-toggle{display:none}
}
.site-header.is-scrolled .nav-toggle{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.2)}
.nav-drawer{
  margin-top:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-h);
  padding:12px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
}
.nav-drawer[hidden]{display:none}
@media (min-width:1024px){
  .nav-drawer{display:none !important}
}
.drawer-item{
  display:flex;
  align-items:center;
  gap:9px;
  padding:12px 14px;
  border-radius:14px;
  font-size:14.5px;
  font-weight:500;
  color:var(--t2);
  background:var(--bg);
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.drawer-item i{font-size:13px;color:var(--star)}
.drawer-item:hover{background:rgba(24,200,192,.14);color:var(--nebula);transform:translateY(-2px)}
.drawer-item.active{background:rgba(91,52,201,.1);color:var(--nebula);font-weight:700}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--star);outline-offset:3px}
.btn-gradient{
  background:var(--grad);
  color:#fff;
  box-shadow:0 10px 26px rgba(91,52,201,.28);
}
.btn-gradient:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(91,52,201,.36)}
.btn-gradient:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(91,52,201,.3)}
.btn-ghost{
  background:var(--surface);
  color:var(--ink);
  border-color:var(--line);
  box-shadow:var(--sh);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--star);box-shadow:var(--sh-h)}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{
  background:rgba(255,255,255,.14);
  color:#fff;
  border-color:rgba(255,255,255,.3);
}
.btn-light:hover{background:rgba(255,255,255,.24);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:14px}
.btn-block{width:100%}

/* ============ 通用板块 ============ */
.sec{padding:56px 0;position:relative}
@media (min-width:768px){
  .sec{padding:80px 0}
}
.sec-head{margin-bottom:32px}
@media (min-width:768px){
  .sec-head{margin-bottom:40px}
}
.sec-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--nebula);
  background:rgba(91,52,201,.09);
  margin-bottom:14px;
}
.sec-kicker i{font-size:12px;color:var(--star)}
.sec-title{
  font-size:clamp(1.5rem,3vw,2.1rem);
  font-weight:700;
  line-height:1.28;
  color:var(--ink);
  letter-spacing:-.01em;
}
.sec-sub{
  margin-top:12px;
  font-size:15.5px;
  color:var(--t2);
  max-width:760px;
}
.rule{
  width:56px;
  height:3px;
  border-radius:999px;
  background:var(--grad);
  margin-top:16px;
}

/* ============ Hero ============ */
.hero{padding:28px 0 8px}
@media (min-width:768px){
  .hero{padding:40px 0 12px}
}
.hero-grid{
  display:grid;
  gap:26px;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:44px}
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 15px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--ink);
  background:var(--surface);
  border:1px solid var(--line);
  box-shadow:var(--sh);
}
.hero-tag i{color:var(--glow);font-size:12px}
.h1-title{
  margin-top:16px;
  font-size:clamp(2rem,5vw,3.4rem);
  font-weight:700;
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--ink);
}
.h1-title .grad-text{
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  margin-top:14px;
  font-size:clamp(1.05rem,1.6vw,1.25rem);
  font-weight:600;
  color:var(--nebula);
}
.hero-desc{
  margin-top:12px;
  font-size:15.5px;
  color:var(--t2);
  max-width:600px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
.hero-metrics{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.metric-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 15px;
  border-radius:999px;
  background:rgba(24,200,192,.12);
  border:1px solid rgba(24,200,192,.28);
  font-size:13.5px;
  font-weight:600;
  color:var(--ink);
}
.metric-chip i{color:var(--star);font-size:13px}
.metric-chip .num{color:var(--nebula)}

/* hero 视觉卡 */
.hero-visual{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  box-shadow:var(--sh-h);
  min-height:360px;
  border:1px solid var(--line);
}
.hero-visual-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-visual-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(140deg,rgba(42,27,99,.92) 0%,rgba(91,52,201,.76) 52%,rgba(24,200,192,.62) 100%);
}
.hero-visual-inner{
  position:relative;
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:16px;
  height:100%;
  color:#fff;
}
@media (min-width:768px){
  .hero-visual-inner{padding:28px}
}
.hero-visual-title{
  font-size:15px;
  font-weight:600;
  color:#fff;
  display:flex;
  align-items:center;
  gap:9px;
}
.hero-visual-title i{color:#7FF0E9}
.hero-icon-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}
.hero-icon-card{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 13px;
  border-radius:14px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  font-size:13.5px;
  font-weight:600;
  color:#fff;
  transition:background .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease);
}
.hero-icon-card i{
  width:26px;
  height:26px;
  border-radius:9px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:rgba(24,200,192,.28);
  color:#C8FFF9;
  font-size:12px;
  flex:0 0 auto;
}
.hero-icon-card:hover{background:rgba(255,255,255,.24);transform:translateY(-2px);border-color:rgba(255,255,255,.45)}
.hero-badges{
  margin-top:auto;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 13px;
  border-radius:999px;
  background:rgba(24,200,192,.18);
  border:1px solid rgba(255,255,255,.24);
  font-size:12.5px;
  font-weight:600;
  color:#fff;
}
.hero-badge i{font-size:12px;color:#9CF4EE}

/* ============ 通道大卡网格 ============ */
.card-grid-2{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:768px){
  .card-grid-2{grid-template-columns:1fr 1fr;gap:24px}
}
.channel-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh);
  padding:26px 24px;
  display:flex;
  flex-direction:column;
  gap:16px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.channel-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-h);
  border-color:rgba(24,200,192,.55);
}
.channel-top{
  display:flex;
  align-items:center;
  gap:14px;
}
.channel-icon{
  width:46px;
  height:46px;
  border-radius:14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,rgba(91,52,201,.14),rgba(24,200,192,.18));
  color:var(--nebula);
  font-size:17px;
  flex:0 0 auto;
}
.channel-card h3{
  font-size:1.2rem;
  font-weight:700;
  color:var(--ink);
  line-height:1.4;
}
.channel-points{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.channel-points li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:var(--t2);
  line-height:1.7;
}
.channel-points li i{
  color:var(--star);
  font-size:11px;
  margin-top:8px;
  flex:0 0 auto;
}
.channel-link{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:700;
  color:var(--nebula);
}
.channel-link i{font-size:12px;transition:transform .25s var(--ease)}
.channel-link:hover{color:var(--star)}
.channel-link:hover i{transform:translateX(4px)}

/* ============ 步骤条 ============ */
.step-row{
  display:grid;
  gap:16px;
  grid-template-columns:1fr;
}
@media (min-width:768px){
  .step-row{grid-template-columns:repeat(4,1fr);gap:20px}
}
.step-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px 20px 20px;
  box-shadow:var(--sh);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:rgba(24,200,192,.5)}
.step-no{
  position:absolute;
  top:-14px;
  left:20px;
  height:28px;
  min-width:44px;
  padding:0 10px;
  border-radius:999px;
  background:var(--grad);
  color:#fff;
  font-size:12.5px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 18px rgba(91,52,201,.28);
  font-variant-numeric:tabular-nums;
}
.step-card h3{
  font-size:16px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:8px;
}
.step-card p{font-size:14.5px;color:var(--t2)}

/* ============ 使用场景横滚 ============ */
.scroll-wrap{position:relative}
.scroll-wrap::after{
  content:"";
  position:absolute;
  top:0;
  right:-16px;
  bottom:14px;
  width:56px;
  background:linear-gradient(90deg,rgba(246,245,252,0),var(--bg));
  pointer-events:none;
}
@media (min-width:768px){
  .scroll-wrap::after{display:none}
}
.scene-row{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:78%;
  gap:16px;
  overflow-x:auto;
  padding:4px 4px 16px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.scene-row::-webkit-scrollbar{height:6px}
.scene-row::-webkit-scrollbar-thumb{background:rgba(91,52,201,.25);border-radius:999px}
@media (min-width:768px){
  .scene-row{grid-auto-flow:row;grid-template-columns:repeat(4,1fr);grid-auto-columns:auto;overflow:visible;padding:0}
}
.scene-card{
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px 20px;
  box-shadow:var(--sh);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);border-color:rgba(24,200,192,.5)}
.scene-card i{
  display:inline-flex;
  width:38px;
  height:38px;
  border-radius:12px;
  align-items:center;
  justify-content:center;
  background:rgba(24,200,192,.14);
  color:var(--star);
  font-size:15px;
  margin-bottom:14px;
}
.scene-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.scene-card p{font-size:14px;color:var(--t2)}

/* ============ 图文说明 ============ */
.feature-split{
  display:grid;
  gap:24px;
  align-items:center;
}
@media (min-width:1024px){
  .feature-split{grid-template-columns:5fr 7fr;gap:44px}
}
.feature-figure{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-h);
  aspect-ratio:4/3;
  background:var(--bg);
}
.feature-figure img{width:100%;height:100%;object-fit:cover}
.feature-list{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin-top:22px;
}
.feature-list li{
  display:flex;
  gap:13px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:15px 17px;
  box-shadow:var(--sh);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.feature-list li:hover{transform:translateY(-2px);border-color:rgba(24,200,192,.5)}
.feature-list i{
  color:var(--nebula);
  font-size:14px;
  margin-top:6px;
  flex:0 0 auto;
}
.feature-list strong{
  display:block;
  font-size:15px;
  color:var(--ink);
  margin-bottom:2px;
}
.feature-list span{font-size:14px;color:var(--t2)}

/* ============ 数据条 ============ */
.stat-band{
  border-radius:var(--r-lg);
  background:var(--ink);
  color:#fff;
  padding:32px 24px;
  position:relative;
  overflow:hidden;
  box-shadow:0 20px 44px rgba(36,26,85,.24);
}
.stat-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(42,27,99,.6) 0%,rgba(91,52,201,.45) 50%,rgba(24,200,192,.35) 100%);
}
.stat-grid{
  position:relative;
  display:grid;
  gap:22px;
  grid-template-columns:1fr 1fr;
}
@media (min-width:768px){
  .stat-grid{grid-template-columns:repeat(4,1fr);gap:26px}
}
.stat-item .stat-num{
  font-size:clamp(1.6rem,3.4vw,2.2rem);
  font-weight:700;
  line-height:1.2;
  color:#fff;
  font-variant-numeric:tabular-nums;
}
.stat-item .stat-label{
  margin-top:6px;
  font-size:13.5px;
  color:rgba(255,255,255,.7);
}
.stat-item .stat-label i{color:var(--star);margin-right:6px;font-size:12px}

/* ============ FAQ ============ */
.faq-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  max-width:900px;
}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh);
  overflow:hidden;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.faq-item[open]{background:var(--bg);border-color:rgba(24,200,192,.45)}
.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  font-size:15.5px;
  font-weight:700;
  color:var(--ink);
  cursor:pointer;
  list-style:none;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q:focus-visible{outline:2px solid var(--star);outline-offset:-2px}
.faq-icon{
  width:26px;
  height:26px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:rgba(91,52,201,.1);
  color:var(--nebula);
  font-size:12px;
  flex:0 0 auto;
}
.faq-icon i{transition:transform .3s var(--ease)}
.faq-item[open] .faq-icon i{transform:rotate(45deg)}
.faq-a{
  padding:0 20px 20px;
  font-size:14.5px;
  color:var(--t2);
}

/* ============ CTA ============ */
.cta-band{
  border-radius:var(--r-lg);
  background:var(--grad);
  color:#fff;
  padding:34px 26px;
  display:flex;
  flex-direction:column;
  gap:20px;
  box-shadow:0 22px 46px rgba(91,52,201,.3);
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:220px;
  height:220px;
  border-radius:50%;
  background:rgba(255,255,255,.1);
}
@media (min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 40px;gap:32px}
}
.cta-band h2{
  font-size:clamp(1.35rem,2.6vw,1.8rem);
  font-weight:700;
  line-height:1.3;
}
.cta-band p{
  margin-top:10px;
  font-size:14.5px;
  color:rgba(255,255,255,.86);
  max-width:620px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);
  color:#fff;
  margin-top:60px;
  position:relative;
  z-index:1;
}
.footer-bar{height:4px;background:var(--grad)}
.footer-grid{
  display:grid;
  gap:30px;
  grid-template-columns:1fr;
  padding:48px 0 34px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px;padding:56px 0 40px}
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
}
.footer-brand .brand-mark{
  width:34px;
  height:34px;
  border-radius:11px;
  background:var(--grad);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:14px;
}
.footer-about{
  margin-top:14px;
  font-size:14px;
  color:rgba(255,255,255,.68);
  max-width:340px;
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  margin-bottom:16px;
  color:#fff;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.72);
}
.footer-links a:hover{color:var(--star)}
.footer-contact{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,.72);
}
.footer-contact li i{color:var(--star);margin-top:6px;font-size:12px;flex:0 0 auto}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* ============ 移动端底部操作条 ============ */
.mobile-bar{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:70;
  display:flex;
  gap:10px;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(42,27,99,.1);
}
.mobile-bar .btn{flex:1}
@media (min-width:768px){
  .mobile-bar{display:none}
}
body{padding-bottom:78px}
@media (min-width:768px){
  body{padding-bottom:0}
}

/* roulang page: category2 */
:root{
  --ink:#241A55;
  --nebula:#5B34C9;
  --star:#18C8C0;
  --glow:#F5A623;
  --bg:#F6F5FC;
  --surface:#FFFFFF;
  --line:#E7E4F5;
  --text:#1A1730;
  --text-sub:#5A5671;
  --text-weak:#8B87A3;
  --brand-gradient:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
  --shadow-card:0 8px 30px rgba(42,27,99,.08);
  --shadow-hover:0 16px 40px rgba(42,27,99,.14);
  --radius-lg:24px;
  --radius-md:16px;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.2}
h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.15}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.15rem;line-height:1.45}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--star);outline-offset:3px;border-radius:8px}
::selection{background:rgba(24,200,192,.28)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#CFC9EC;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--nebula)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:999}
.skip-link:focus{left:0}

/* 顶部导航：卡片化面板 */
.site-header{position:sticky;top:0;z-index:80;padding:10px 0;transition:padding .3s ease}
.site-header.scrolled{padding:6px 0}
.nav-panel{
  display:flex;align-items:center;gap:14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:9px 12px;
  box-shadow:var(--shadow-card);
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);white-space:nowrap;font-size:16px}
.brand-mark{
  width:36px;height:36px;border-radius:12px;flex:0 0 36px;
  display:grid;place-items:center;
  background:var(--brand-gradient);color:#fff;font-size:15px;
}
.nav-links{display:none;gap:2px;margin-left:auto}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-item{
  display:flex;align-items:center;gap:7px;
  padding:9px 12px;border-radius:14px;
  font-size:14px;color:var(--text-sub);
  transition:background .25s ease,color .25s ease,transform .25s ease;
  white-space:nowrap;
}
.nav-item i{font-size:13px;color:var(--nebula);transition:color .25s ease}
.nav-item:hover{background:rgba(24,200,192,.12);color:var(--ink);transform:translateY(-2px)}
.nav-item.active{background:rgba(24,200,192,.16);color:var(--ink);font-weight:600}
.nav-cta{display:none;margin-left:8px}
@media (min-width:1024px){.nav-cta{display:flex;align-items:center;gap:10px}}
.nav-toggle{
  margin-left:auto;width:42px;height:42px;border-radius:14px;
  border:1px solid var(--line);color:var(--ink);
  display:grid;place-items:center;font-size:16px;
  transition:border-color .25s ease,background .25s ease,transform .25s ease;
}
.nav-toggle:hover{border-color:var(--star);background:rgba(24,200,192,.1)}
@media (min-width:1024px){.nav-toggle{display:none}}

.site-header.scrolled .nav-panel{background:var(--ink);border-color:rgba(255,255,255,.14);box-shadow:0 12px 34px rgba(20,12,50,.35)}
.site-header.scrolled .brand{color:#fff}
.site-header.scrolled .nav-item{color:rgba(255,255,255,.78)}
.site-header.scrolled .nav-item i{color:var(--star)}
.site-header.scrolled .nav-item:hover{background:rgba(24,200,192,.18);color:#fff}
.site-header.scrolled .nav-item.active{background:rgba(24,200,192,.24);color:#fff}
.site-header.scrolled .nav-toggle{color:#fff;border-color:rgba(255,255,255,.22)}

.mobile-drawer{
  display:none;
  margin-top:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-hover);
  padding:12px;
}
.mobile-drawer.open{display:block}
.mobile-drawer .nav-item{width:100%;padding:12px 14px;border-radius:14px;font-size:15px}
.mobile-drawer .nav-item + .nav-item{margin-top:4px}
.mobile-drawer .btn{width:100%;margin-top:10px}
@media (min-width:1024px){.mobile-drawer{display:none !important}}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:16px;padding:12px 22px;
  font-size:14px;font-weight:600;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand-gradient);color:#fff;box-shadow:0 10px 24px rgba(91,52,201,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,52,201,.36)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(91,52,201,.3)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--star);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{background:#DAD6EC;color:#8B87A3;box-shadow:none;pointer-events:none;opacity:.6}

/* 面包屑 */
.crumb-bar{background:transparent;padding:18px 0 4px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-weak)}
.crumb a{color:var(--text-sub)}
.crumb a:hover{color:var(--nebula)}
.crumb .sep{color:#C6C1E0}
.crumb .current{color:var(--ink);font-weight:600}

/* 通用板块 */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
.section-head{margin-bottom:32px;max-width:760px}
@media (min-width:768px){.section-head{margin-bottom:40px}}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--nebula);
  background:rgba(91,52,201,.1);
  border-radius:999px;
  padding:5px 13px;
  margin-bottom:14px;
}
.section-sub{color:var(--text-sub);margin-top:10px;font-size:15.5px}
.rule{width:52px;height:3px;border-radius:999px;background:var(--brand-gradient);margin-top:16px}

/* Hero */
.hero{
  position:relative;
  padding:26px 0 56px;
}
@media (min-width:768px){.hero{padding:34px 0 76px}}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(680px 320px at 88% 0%, rgba(24,200,192,.16), transparent 70%),
    radial-gradient(520px 300px at 4% 12%, rgba(91,52,201,.14), transparent 72%);
}
.hero-grid{display:grid;gap:28px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:40px}}
.hero h1{margin-top:2px}
.hero-sub{margin-top:16px;font-size:17px;color:var(--text-sub);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-points{margin-top:26px;display:grid;gap:10px}
.hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--text-sub)}
.hero-points i{color:var(--star);margin-top:5px;font-size:14px}

.hero-card{
  position:relative;
  border-radius:24px;
  overflow:hidden;
  min-height:340px;
  display:flex;align-items:flex-end;
  box-shadow:0 20px 46px rgba(36,26,85,.25);
  background-image:
    linear-gradient(165deg, rgba(36,26,85,.94) 0%, rgba(91,52,201,.76) 52%, rgba(24,200,192,.6) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.hero-card-body{padding:26px 22px;color:#fff;width:100%}
@media (min-width:768px){.hero-card-body{padding:30px 28px}}
.hero-card-body h2{color:#fff;font-size:1.3rem;margin-bottom:6px}
.hero-card-body p{font-size:14px;color:rgba(255,255,255,.82);margin-top:12px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(24,200,192,.16);
  border:1px solid rgba(24,200,192,.36);
  color:#EAFBF9;
  border-radius:999px;
  padding:7px 14px;
  font-size:13px;
  font-variant-numeric:tabular-nums;
}
.badge i{font-size:13px;color:var(--star)}

/* 步骤时间轴 */
.steps-section{background:linear-gradient(180deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.72) 100%)}
.step-track{
  display:grid;gap:18px;
  padding:14px 0 8px;
}
@media (min-width:768px){.step-track{grid-template-columns:repeat(2,1fr);gap:20px}}
@media (min-width:1024px){.step-track{grid-template-columns:repeat(5,1fr);gap:16px;padding:44px 0 10px}}
.step-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  padding:24px 18px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--star)}
.step-card h3{font-size:1.05rem;margin-top:14px}
.step-card p{font-size:14px;color:var(--text-sub);margin-top:8px}
.step-num{
  width:40px;height:40px;border-radius:13px;
  display:grid;place-items:center;
  background:var(--brand-gradient);
  color:#fff;font-weight:700;font-size:14px;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.step-meta{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;font-size:12.5px;color:var(--text-weak);
}
.step-meta i{color:var(--star)}
.step-dot{
  position:absolute;top:-8px;left:50%;transform:translateX(-50%);
  width:14px;height:14px;border-radius:50%;
  background:var(--star);
  box-shadow:0 0 0 5px rgba(24,200,192,.16);
}
@media (max-width:1023px){.step-dot{display:none}}
@media (min-width:1024px){
  .step-track .step-card:nth-child(1){margin-top:0}
  .step-track .step-card:nth-child(2){margin-top:-16px}
  .step-track .step-card:nth-child(3){margin-top:-32px}
  .step-track .step-card:nth-child(4){margin-top:-16px}
  .step-track .step-card:nth-child(5){margin-top:0}
}

/* 说明卡 */
.note-grid{display:grid;gap:20px}
@media (min-width:768px){.note-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
.note-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  padding:26px 22px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.note-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--star)}
.note-card h3{display:flex;align-items:center;gap:10px;font-size:1.15rem}
.note-card h3 i{color:var(--nebula);font-size:16px}
.note-list{margin-top:18px;display:grid;gap:12px}
.note-list li{
  display:flex;gap:12px;font-size:14.5px;color:var(--text-sub);
  padding-bottom:12px;
  border-bottom:1px dashed var(--line);
}
.note-list li:last-child{border-bottom:0;padding-bottom:0}
.note-list .idx{
  flex:0 0 26px;height:26px;border-radius:9px;
  display:grid;place-items:center;
  background:rgba(91,52,201,.1);color:var(--nebula);
  font-size:12.5px;font-weight:600;
  font-variant-numeric:tabular-nums;margin-top:2px;
}

/* 图文区块 */
.prep-panel{
  display:grid;gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.prep-panel{grid-template-columns:5fr 7fr}}
.prep-media{position:relative;min-height:240px;background:var(--ink)}
.prep-media img{width:100%;height:100%;object-fit:cover;min-height:240px}
.prep-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(36,26,85,.1) 0%,rgba(36,26,85,.52) 100%);
}
.prep-body{padding:26px 22px}
@media (min-width:768px){.prep-body{padding:34px 32px}}
.prep-body h2{font-size:clamp(1.3rem,2.4vw,1.7rem)}
.prep-body p{color:var(--text-sub);margin-top:12px;font-size:15px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:7px 14px;
  font-size:13px;color:var(--ink);
  background:rgba(24,200,192,.12);
  border:1px solid rgba(24,200,192,.3);
}
.chip i{color:var(--star);font-size:12px}
.prep-list{margin-top:20px;display:grid;gap:10px}
.prep-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-sub)}
.prep-list i{color:var(--nebula);margin-top:5px;font-size:13px}

/* 设备卡横滚 */
.device-scroller{
  display:flex;gap:16px;
  overflow-x:auto;
  padding:4px 16px 18px;
  margin:0 -16px;
  scroll-snap-type:x mandatory;
}
@media (min-width:768px){
  .device-scroller{overflow:visible;padding:0;margin:0;flex-wrap:wrap}
}
.device-card{
  flex:0 0 82%;
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  padding:24px 20px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
@media (min-width:768px){.device-card{flex:1 1 calc(50% - 12px)}}
@media (min-width:1024px){.device-card{flex:1 1 calc(25% - 12px)}}
.device-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--star)}
.device-icon{
  width:44px;height:44px;border-radius:14px;
  display:grid;place-items:center;
  background:rgba(91,52,201,.1);color:var(--nebula);
  font-size:17px;
}
.device-card h3{margin-top:16px;font-size:1.05rem}
.device-card p{font-size:14px;color:var(--text-sub);margin-top:8px}
.device-tag{
  display:inline-block;margin-top:14px;
  font-size:12.5px;color:var(--nebula);
  background:rgba(91,52,201,.09);
  border-radius:999px;padding:4px 11px;
}

/* FAQ */
.faq-wrap{display:grid;gap:22px}
@media (min-width:1024px){.faq-wrap{grid-template-columns:4fr 8fr;gap:34px;align-items:start}}
.faq-side{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  padding:26px 22px;
  box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.faq-side{position:sticky;top:110px}}
.faq-side h2{font-size:1.35rem}
.faq-side p{font-size:14.5px;color:var(--text-sub);margin-top:12px}
.faq-side .btn{width:100%;margin-top:20px}
.faq-list{display:grid;gap:12px}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  overflow:hidden;
  transition:border-color .25s ease,background .25s ease,box-shadow .25s ease;
}
.faq-item:hover{border-color:var(--star);box-shadow:var(--shadow-card)}
.faq-item.open{background:var(--bg)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:18px 20px;
  font-size:15.5px;font-weight:600;color:var(--ink);
}
.faq-q .plus{
  flex:0 0 26px;height:26px;border-radius:9px;
  display:grid;place-items:center;
  background:rgba(24,200,192,.14);color:var(--nebula);
  font-size:14px;transition:transform .3s ease,background .3s ease,color .3s ease;
}
.faq-item.open .plus{transform:rotate(45deg);background:var(--brand-gradient);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease,padding .35s ease;
  padding:0 20px;
}
.faq-item.open .faq-a{max-height:320px;padding:0 20px 20px}
.faq-a p{font-size:14.5px;color:var(--text-sub)}

/* CTA 条 */
.cta-band{
  border-radius:24px;
  padding:34px 24px;
  background:var(--brand-gradient);
  color:#fff;
  display:grid;gap:22px;
  box-shadow:0 20px 44px rgba(42,27,99,.24);
}
@media (min-width:768px){
  .cta-band{grid-template-columns:7fr 5fr;align-items:center;padding:40px 40px}
}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,2.6vw,1.9rem)}
.cta-band p{color:rgba(255,255,255,.84);margin-top:12px;font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (min-width:768px){.cta-actions{justify-content:flex-end}}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.2)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}

/* 页脚 */
.site-footer{position:relative;background:var(--ink);color:#fff;margin-top:56px}
@media (min-width:768px){.site-footer{margin-top:80px}}
.footer-bar{height:4px;width:100%;background:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%)}
.footer-grid{
  display:grid;gap:30px;
  padding:48px 0 34px;
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:5fr 3fr 3fr 4fr;gap:36px;padding:58px 0 40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:#fff}
.footer-about{margin-top:16px;font-size:14px;color:rgba(255,255,255,.7);max-width:360px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-links a:hover{color:var(--star);transform:translateX(2px)}
.footer-contact{display:grid;gap:12px}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-contact i{color:var(--star);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0 22px;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* 移动端底部操作条 */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:center;gap:12px;
  padding:10px 16px;
  background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(42,27,99,.08);
}
.mobile-bar span{font-size:13px;color:var(--text-sub);flex:1}
.mobile-bar .btn{padding:10px 16px;font-size:13.5px}
@media (min-width:1024px){.mobile-bar{display:none}}
@media (max-width:1023px){body{padding-bottom:72px}}

/* roulang page: category3 */
:root{
    --ink:#241A55;
    --nebula:#5B34C9;
    --star:#18C8C0;
    --glow:#F5A623;
    --bg:#F6F5FC;
    --surface:#FFFFFF;
    --line:#E7E4F5;
    --text:#1A1730;
    --text-2:#5A5671;
    --text-3:#8B87A3;
    --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
    --radius-lg:24px;
    --radius-md:16px;
    --shadow-1:0 8px 30px rgba(42,27,99,.08);
    --shadow-2:0 16px 40px rgba(42,27,99,.14);
    --container:1200px;
  }

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

  html{scroll-behavior:smooth;}

  body{
    margin:0;
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }

  img{max-width:100%;display:block;border-style:none;}
  a{color:inherit;text-decoration:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  button,input,select,textarea{font:inherit;color:inherit;}
  button{cursor:pointer;border:0;background:none;}
  :focus-visible{outline:2px solid var(--star);outline-offset:2px;border-radius:8px;}

  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 16px;
  }

  @media (min-width:768px){
    .container{padding:0 24px;}
  }

  /* ============ 头部与导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    padding:12px 0;
    transition:padding .25s ease;
  }

  .header-shell{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-1);
    padding:10px 14px;
    display:flex;
    align-items:center;
    gap:14px;
    transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
  }

  .site-header.is-scrolled .header-shell{
    background:var(--ink);
    border-color:rgba(255,255,255,.14);
    box-shadow:0 14px 34px rgba(36,26,85,.28);
  }

  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex-shrink:0;
  }

  .brand-mark{
    width:40px;
    height:40px;
    border-radius:13px;
    background:var(--grad);
    color:#fff;
    display:grid;
    place-items:center;
    font-size:16px;
    box-shadow:0 8px 20px rgba(91,52,201,.28);
    flex-shrink:0;
  }

  .brand-text{display:flex;flex-direction:column;line-height:1.25;}
  .brand-name{font-size:16px;font-weight:700;letter-spacing:.5px;color:var(--ink);transition:color .3s ease;}
  .brand-sub{font-size:11px;letter-spacing:1.6px;color:var(--text-3);transition:color .3s ease;}

  .site-header.is-scrolled .brand-name{color:#fff;}
  .site-header.is-scrolled .brand-sub{color:rgba(255,255,255,.6);}

  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
    flex-wrap:wrap;
  }

  .nav-item{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:8px 12px;
    border-radius:14px;
    font-size:14px;
    font-weight:500;
    color:var(--text-2);
    border:1px solid transparent;
    transition:background .22s ease,color .22s ease,transform .22s ease,border-color .22s ease;
    white-space:nowrap;
  }

  .nav-item i{font-size:14px;color:var(--nebula);transition:color .22s ease;}

  .nav-item:hover{
    background:rgba(24,200,192,.12);
    color:var(--ink);
    transform:translateY(-2px);
    border-color:rgba(24,200,192,.3);
  }

  .nav-item.active{
    background:var(--grad);
    color:#fff;
    box-shadow:0 8px 20px rgba(91,52,201,.26);
  }

  .nav-item.active i{color:#fff;}

  .site-header.is-scrolled .nav-item{color:rgba(255,255,255,.78);}
  .site-header.is-scrolled .nav-item i{color:var(--star);}
  .site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.18);color:#fff;border-color:rgba(24,200,192,.35);}
  .site-header.is-scrolled .nav-item.active{background:var(--grad);color:#fff;}
  .site-header.is-scrolled .nav-item.active i{color:#fff;}

  .header-actions{
    display:flex;
    align-items:center;
    gap:10px;
    margin-left:auto;
    flex-shrink:0;
  }

  .nav-toggle{
    display:none;
    width:42px;
    height:42px;
    border-radius:14px;
    background:var(--bg);
    border:1px solid var(--line);
    color:var(--ink);
    place-items:center;
    font-size:16px;
    transition:background .22s ease,color .22s ease,transform .22s ease;
  }

  .nav-toggle:hover{background:rgba(24,200,192,.14);transform:translateY(-2px);}

  .site-header.is-scrolled .nav-toggle{
    background:rgba(255,255,255,.1);
    border-color:rgba(255,255,255,.18);
    color:#fff;
  }

  .mobile-panel{
    margin-top:10px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-2);
    padding:14px;
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
  }

  .mobile-panel[hidden]{display:none;}

  .mobile-panel .nav-item{
    justify-content:flex-start;
    background:var(--bg);
    border-radius:14px;
    padding:12px 14px;
  }

  .mobile-panel .nav-item.active{background:var(--grad);color:#fff;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:var(--radius-md);
    padding:12px 22px;
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  }

  .btn-primary{
    background:var(--grad);
    color:#fff;
    box-shadow:0 10px 24px rgba(91,52,201,.26);
  }

  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(91,52,201,.24);}

  .btn-ghost{
    background:var(--surface);
    color:var(--ink);
    border-color:var(--line);
  }

  .btn-ghost:hover{border-color:var(--star);transform:translateY(-2px);box-shadow:var(--shadow-1);}
  .btn-ghost:active{transform:translateY(1px);}

  .btn-sm{padding:9px 16px;font-size:14px;border-radius:14px;}

  .btn[disabled]{background:#D8D5E6;color:#8B87A3;box-shadow:none;opacity:.6;cursor:not-allowed;}

  /* ============ 通用区块 ============ */
  .section{padding:52px 0;}
  @media (min-width:768px){.section{padding:76px 0;}}

  .section-head{margin-bottom:26px;}
  @media (min-width:768px){.section-head{margin-bottom:38px;}}

  .section-title{
    position:relative;
    font-size:clamp(1.5rem,3vw,2.1rem);
    font-weight:700;
    line-height:1.3;
    letter-spacing:-.4px;
    color:var(--ink);
    padding-left:16px;
  }

  .section-title::before{
    content:"";
    position:absolute;
    left:0;
    top:.28em;
    width:4px;
    height:1.05em;
    border-radius:4px;
    background:var(--star);
  }

  .section-lead{
    margin-top:12px;
    color:var(--text-2);
    font-size:15px;
    max-width:760px;
  }

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 14px;
    border-radius:999px;
    background:rgba(91,52,201,.08);
    border:1px solid rgba(91,52,201,.16);
    color:var(--nebula);
    font-size:13px;
    font-weight:600;
    letter-spacing:.4px;
  }

  .eyebrow .num{color:var(--ink);}

  /* ============ Hero ============ */
  .hero{padding:22px 0 8px;}
  @media (min-width:768px){.hero{padding:34px 0 12px;}}

  .hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:28px;
    align-items:center;
  }

  @media (min-width:1024px){
    .hero-grid{grid-template-columns:7fr 5fr;gap:40px;}
  }

  .hero h1{
    font-size:clamp(2rem,5vw,3.4rem);
    line-height:1.15;
    font-weight:700;
    letter-spacing:-.8px;
    color:var(--ink);
    margin:16px 0 12px;
  }

  .hero h1 .hl{
    background:linear-gradient(120deg,#5B34C9 0%,#18C8C0 100%);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }

  .hero-sub{
    font-size:17px;
    font-weight:600;
    color:var(--ink);
    margin-bottom:12px;
  }

  .hero-desc{
    color:var(--text-2);
    font-size:15.5px;
    max-width:600px;
  }

  .hero-cta{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:24px;
  }

  .hero-card{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    min-height:330px;
    padding:24px;
    display:flex;
    flex-direction:column;
    justify-content:flex-end;
    color:#fff;
    background-image:
      linear-gradient(160deg,rgba(36,26,85,.9) 0%,rgba(91,52,201,.72) 52%,rgba(24,200,192,.55) 100%),
      url('/assets/images/backpic/back-1.png');
    background-size:cover;
    background-position:center;
    box-shadow:var(--shadow-2);
  }

  .hero-card h2{
    font-size:20px;
    font-weight:700;
    line-height:1.4;
    color:#fff;
    margin-bottom:8px;
  }

  .hero-card p{
    font-size:14px;
    color:rgba(255,255,255,.82);
    margin-bottom:18px;
    max-width:420px;
  }

  .hero-badges{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
  }

  .hero-badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 14px;
    border-radius:999px;
    background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.26);
    font-size:13px;
    font-weight:600;
    color:#fff;
    backdrop-filter:blur(2px);
  }

  .hero-badge i{color:var(--star);font-size:14px;}

  /* ============ 数据徽章行 ============ */
  .stat-row{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px;
    margin-top:32px;
  }

  @media (min-width:900px){
    .stat-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
  }

  .stat-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:20px;
    padding:18px 20px;
    box-shadow:var(--shadow-1);
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  }

  .stat-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-2);
    border-color:rgba(24,200,192,.45);
  }

  .stat-top{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--text-3);
  }

  .stat-top i{color:var(--star);font-size:14px;}

  .stat-num{
    font-size:28px;
    font-weight:700;
    color:var(--ink);
    line-height:1.2;
    margin-top:6px;
  }

  /* ============ 对比表 ============ */
  .table-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-1);
    overflow:hidden;
  }

  .table-scroll{
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
  }

  table.compare{
    width:100%;
    min-width:900px;
    border-collapse:collapse;
  }

  .compare thead th{
    background:var(--ink);
    color:#fff;
    font-size:14px;
    font-weight:600;
    text-align:left;
    padding:16px 18px;
    white-space:nowrap;
    border-right:1px solid rgba(255,255,255,.08);
  }

  .compare thead th:last-child{border-right:0;}

  .compare thead th .head-sub{
    display:block;
    font-size:12px;
    font-weight:400;
    color:rgba(255,255,255,.62);
    margin-top:2px;
  }

  .compare thead th.recommend{
    background:linear-gradient(120deg,#2A1B63 0%,#5B34C9 55%,#18C8C0 100%);
    position:relative;
  }

  .compare thead th.recommend .tag-rec{
    display:inline-flex;
    align-items:center;
    gap:4px;
    margin-left:8px;
    padding:2px 9px;
    border-radius:999px;
    background:var(--star);
    color:#0B2E2C;
    font-size:11px;
    font-weight:700;
    vertical-align:middle;
  }

  .compare tbody th{
    text-align:left;
    font-size:14px;
    font-weight:600;
    color:var(--ink);
    background:var(--bg);
    padding:15px 18px;
    white-space:nowrap;
    border-top:1px solid var(--line);
    position:sticky;
    left:0;
    z-index:2;
  }

  .compare tbody td{
    font-size:14.5px;
    color:var(--text-2);
    padding:15px 18px;
    border-top:1px solid var(--line);
    white-space:nowrap;
  }

  .compare tbody td.recommend{
    background:rgba(24,200,192,.08);
    color:var(--ink);
    font-weight:600;
  }

  .compare tbody tr:hover td{background:rgba(246,245,252,.95);}
  .compare tbody tr:hover td.recommend{background:rgba(24,200,192,.14);}

  .table-note{
    display:flex;
    align-items:flex-start;
    gap:10px;
    padding:16px 20px;
    background:var(--bg);
    border-top:1px solid var(--line);
    font-size:13.5px;
    color:var(--text-3);
  }

  .table-note i{color:var(--nebula);margin-top:4px;}

  /* ============ 检查清单 ============ */
  .check-scroll{
    display:flex;
    gap:16px;
    overflow-x:auto;
    padding-bottom:12px;
    scroll-snap-type:x mandatory;
  }

  .check-scroll::-webkit-scrollbar{height:6px;}
  .check-scroll::-webkit-scrollbar-thumb{background:rgba(91,52,201,.28);border-radius:999px;}

  .check-card{
    flex:0 0 244px;
    min-width:244px;
    scroll-snap-align:start;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:20px;
    padding:20px;
    box-shadow:var(--shadow-1);
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  }

  .check-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-2);
    border-color:rgba(24,200,192,.45);
  }

  .check-icon{
    width:42px;
    height:42px;
    border-radius:13px;
    display:grid;
    place-items:center;
    background:rgba(24,200,192,.14);
    color:var(--nebula);
    font-size:17px;
    margin-bottom:14px;
  }

  .check-card h3{
    font-size:16px;
    font-weight:700;
    color:var(--ink);
    margin-bottom:8px;
  }

  .check-card p{
    font-size:14px;
    color:var(--text-2);
  }

  /* ============ 异常处理卡片 ============ */
  .issue-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
  }

  @media (min-width:768px){
    .issue-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  }

  .issue-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
    display:flex;
    flex-direction:column;
  }

  .issue-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-2);
    border-color:rgba(24,200,192,.45);
  }

  .issue-media{
    position:relative;
    aspect-ratio:16/9;
    overflow:hidden;
    background:var(--ink);
  }

  .issue-media img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .4s ease;
  }

  .issue-card:hover .issue-media img{transform:scale(1.04);}

  .issue-media::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(36,26,85,.15) 0%,rgba(36,26,85,.55) 100%);
  }

  .issue-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column;}

  .issue-body h3{
    font-size:17px;
    font-weight:700;
    color:var(--ink);
    margin-bottom:10px;
  }

  .issue-body p{
    font-size:14.5px;
    color:var(--text-2);
    flex:1;
  }

  .issue-steps{
    margin-top:14px;
    display:flex;
    flex-direction:column;
    gap:8px;
  }

  .issue-steps li{
    position:relative;
    padding-left:18px;
    font-size:13.5px;
    color:var(--text-2);
  }

  .issue-steps li::before{
    content:"";
    position:absolute;
    left:2px;
    top:.62em;
    width:6px;
    height:6px;
    border-radius:50%;
    background:var(--star);
  }

  /* ============ FAQ ============ */
  .faq-list{
    display:flex;
    flex-direction:column;
    gap:12px;
  }

  .faq-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:18px;
    overflow:hidden;
    transition:background .24s ease,border-color .24s ease,box-shadow .24s ease;
  }

  .faq-item:hover{border-color:rgba(24,200,192,.42);box-shadow:var(--shadow-1);}

  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:18px 22px;
    font-size:16px;
    font-weight:600;
    color:var(--ink);
  }

  .faq-item summary::-webkit-details-marker{display:none;}

  .faq-item summary::after{
    content:"+";
    font-size:24px;
    line-height:1;
    color:var(--nebula);
    transition:transform .26s ease,color .26s ease;
    flex-shrink:0;
  }

  .faq-item[open]{
    background:var(--bg);
    border-color:rgba(24,200,192,.5);
  }

  .faq-item[open] summary::after{transform:rotate(45deg);color:var(--star);}

  .faq-body{
    padding:0 22px 20px;
    font-size:15px;
    color:var(--text-2);
  }

  /* ============ CTA 条 ============ */
  .cta-band{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    background:var(--grad);
    padding:32px 26px;
    display:flex;
    flex-direction:column;
    gap:20px;
    box-shadow:var(--shadow-2);
  }

  @media (min-width:900px){
    .cta-band{
      flex-direction:row;
      align-items:center;
      justify-content:space-between;
      padding:38px 42px;
    }
  }

  .cta-band::after{
    content:"";
    position:absolute;
    right:-60px;
    top:-70px;
    width:260px;
    height:260px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(24,200,192,.4) 0%,rgba(24,200,192,0) 70%);
    pointer-events:none;
  }

  .cta-band h2{
    font-size:clamp(1.3rem,2.6vw,1.9rem);
    font-weight:700;
    color:#fff;
    line-height:1.35;
  }

  .cta-band p{
    margin-top:8px;
    font-size:14.5px;
    color:rgba(255,255,255,.82);
    max-width:640px;
  }

  .cta-band .btn-ghost{
    background:#fff;
    color:var(--ink);
    border-color:transparent;
    flex-shrink:0;
  }

  .cta-band .btn-ghost:hover{box-shadow:0 16px 40px rgba(0,0,0,.24);}

  /* ============ 页脚 ============ */
  .site-footer{
    position:relative;
    margin-top:64px;
    background:var(--ink);
    color:#fff;
    padding:0 0 26px;
  }

  .footer-bar{
    height:4px;
    background:var(--grad);
  }

  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
    padding:44px 0 30px;
  }

  @media (min-width:768px){
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:28px;}
  }

  .footer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    font-weight:700;
    letter-spacing:.4px;
    margin-bottom:14px;
  }

  .footer-brand .brand-mark{
    width:38px;
    height:38px;
    border-radius:12px;
    font-size:15px;
  }

  .footer-about{
    font-size:14px;
    color:rgba(255,255,255,.66);
    max-width:380px;
  }

  .footer-col h4{
    font-size:15px;
    font-weight:700;
    color:#fff;
    margin-bottom:14px;
  }

  .footer-links{
    display:flex;
    flex-direction:column;
    gap:10px;
  }

  .footer-links a{
    font-size:14px;
    color:rgba(255,255,255,.68);
    transition:color .2s ease,transform .2s ease;
    display:inline-block;
  }

  .footer-links a:hover{color:var(--star);transform:translateX(2px);}

  .footer-contact{
    display:flex;
    flex-direction:column;
    gap:12px;
  }

  .footer-contact li{
    display:flex;
    align-items:flex-start;
    gap:10px;
    font-size:14px;
    color:rgba(255,255,255,.68);
  }

  .footer-contact i{
    color:var(--star);
    margin-top:5px;
    font-size:14px;
  }

  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    padding-top:20px;
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    justify-content:space-between;
    font-size:13px;
    color:rgba(255,255,255,.56);
  }

  /* ============ 移动端底部操作条 ============ */
  .mobile-bar{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:90;
    display:none;
    align-items:center;
    gap:12px;
    padding:10px 16px;
    background:rgba(36,26,85,.97);
    border-top:1px solid rgba(255,255,255,.12);
  }

  .mobile-bar .bar-text{
    color:#fff;
    font-size:13.5px;
    line-height:1.4;
    flex:1;
  }

  .mobile-bar .bar-text span{display:block;color:rgba(255,255,255,.6);font-size:12px;}

  .mobile-bar .btn{padding:10px 18px;font-size:14px;}

  /* ============ 响应式断点 ============ */
  @media (max-width:1080px){
    .nav-links{display:none;}
    .nav-toggle{display:grid;}
    .header-actions{margin-left:auto;}
  }

  @media (max-width:768px){
    body{padding-bottom:76px;}
    .mobile-bar{display:flex;}
    .section{padding:44px 0;}
    .hero-card{min-height:280px;padding:20px;}
    .stat-num{font-size:24px;}
    .compare tbody th{padding:13px 14px;font-size:13.5px;}
    .compare tbody td{padding:13px 14px;font-size:14px;}
    .cta-band{padding:26px 20px;}
  }

  @media (max-width:520px){
    .brand-sub{display:none;}
    .brand-name{font-size:15px;}
    .hero-cta .btn{width:100%;}
    .mobile-panel{grid-template-columns:1fr;}
    .stat-row{grid-template-columns:1fr;gap:12px;}
  }

/* roulang page: category4 */
:root{
    --ink:#241A55;
    --nebula:#5B34C9;
    --star:#18C8C0;
    --glow:#F5A623;
    --bg:#F6F5FC;
    --surface:#FFFFFF;
    --line:#E7E4F5;
    --text:#1A1730;
    --text-2:#5A5671;
    --text-3:#8B87A3;
    --r-lg:24px;
    --r-md:16px;
    --r-sm:12px;
    --shadow-card:0 8px 30px rgba(42,27,99,.08);
    --shadow-hover:0 16px 40px rgba(42,27,99,.14);
    --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:132px;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;height:auto;}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--ink);}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  summary{list-style:none;cursor:pointer;}
  summary::-webkit-details-marker{display:none;}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

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

  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:#EFEDF9;}
  ::-webkit-scrollbar-thumb{background:#C9C3E8;border-radius:99px;}
  ::-webkit-scrollbar-thumb:hover{background:var(--nebula);}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 16px;
  }
  @media (min-width:768px){
    .container{padding:0 24px;}
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 26px;
    border-radius:var(--r-md);
    font-size:.95rem;
    font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
    white-space:nowrap;
  }
  .btn i{font-size:.9em;}
  .btn-primary{
    background:var(--grad);
    color:#fff;
    box-shadow:0 10px 24px rgba(91,52,201,.28);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,52,201,.36);}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(91,52,201,.3);}
  .btn-ghost{
    background:#fff;
    color:var(--ink);
    border-color:var(--line);
    box-shadow:0 4px 14px rgba(42,27,99,.05);
  }
  .btn-ghost:hover{border-color:var(--star);color:var(--nebula);transform:translateY(-2px);box-shadow:var(--shadow-card);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-dark{
    background:var(--ink);
    color:#fff;
  }
  .btn-dark:hover{background:#1a1240;transform:translateY(-2px);box-shadow:0 14px 30px rgba(36,26,85,.3);}
  .btn-sm{padding:10px 18px;font-size:.875rem;border-radius:14px;}
  .btn:disabled{background:#DEDBEC;color:#9A96B2;box-shadow:none;cursor:not-allowed;opacity:.6;transform:none;}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    padding:14px 0 10px;
    transition:padding .25s var(--ease);
  }
  .nav-card{
    display:flex;
    align-items:center;
    gap:14px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:10px 14px;
    box-shadow:var(--shadow-card);
    transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
  }
  .brand{
    display:flex;
    align-items:center;
    gap:11px;
    flex:0 0 auto;
    padding-right:6px;
  }
  .brand-mark{
    width:42px;
    height:42px;
    border-radius:14px;
    background:var(--grad);
    color:#fff;
    display:grid;
    place-items:center;
    font-size:18px;
    box-shadow:0 8px 18px rgba(91,52,201,.28);
    flex:0 0 auto;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-text strong{font-size:1.02rem;font-weight:700;color:var(--ink);letter-spacing:.2px;transition:color .3s var(--ease);}
  .brand-text em{font-style:normal;font-size:.72rem;color:var(--text-3);letter-spacing:.6px;transition:color .3s var(--ease);}

  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
    flex-wrap:wrap;
  }
  .nav-item{
    display:inline-flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    min-width:70px;
    padding:8px 10px;
    border-radius:var(--r-md);
    font-size:.75rem;
    font-weight:600;
    color:var(--text-2);
    transition:all .22s var(--ease);
  }
  .nav-item i{font-size:1.05rem;}
  .nav-item:hover{
    background:rgba(24,200,192,.14);
    color:var(--ink);
    transform:translateY(-2px);
  }
  .nav-item.active{
    background:rgba(24,200,192,.16);
    color:var(--ink);
    box-shadow:inset 0 0 0 1px rgba(24,200,192,.5);
  }
  .nav-cta{margin-left:10px;flex:0 0 auto;}
  .nav-toggle{
    display:none;
    margin-left:auto;
    width:44px;
    height:44px;
    border-radius:14px;
    border:1px solid var(--line);
    background:#fff;
    color:var(--ink);
    font-size:1.1rem;
    cursor:pointer;
  }
  .nav-toggle:hover{border-color:var(--star);color:var(--nebula);}

  .mobile-panel{
    display:none;
    margin-top:10px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-hover);
    padding:12px;
  }
  .mobile-panel.open{display:block;}
  .mobile-panel .nav-item{
    flex-direction:row;
    justify-content:flex-start;
    gap:12px;
    min-width:0;
    width:100%;
    font-size:.9rem;
    padding:12px 14px;
  }
  .mobile-panel .nav-item i{font-size:1rem;width:20px;text-align:center;}
  .mobile-panel .btn{width:100%;margin-top:10px;}

  .site-header.is-scrolled .nav-card{
    background:var(--ink);
    border-color:rgba(255,255,255,.12);
    box-shadow:0 16px 36px rgba(36,26,85,.3);
  }
  .site-header.is-scrolled .brand-text strong{color:#fff;}
  .site-header.is-scrolled .brand-text em{color:rgba(255,255,255,.55);}
  .site-header.is-scrolled .nav-item{color:rgba(255,255,255,.76);}
  .site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.22);color:#fff;}
  .site-header.is-scrolled .nav-item.active{background:rgba(24,200,192,.26);color:#fff;box-shadow:inset 0 0 0 1px rgba(24,200,192,.6);}
  .site-header.is-scrolled .nav-toggle{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#fff;}

  @media (max-width:1023px){
    .nav-links{display:none;}
    .nav-cta{display:none;}
    .nav-toggle{display:grid;place-items:center;}
  }

  /* ============ 通用板块 ============ */
  .section{padding:56px 0;}
  @media (min-width:768px){
    .section{padding:80px 0;}
  }
  .section-head{margin-bottom:32px;}
  @media (min-width:768px){
    .section-head{margin-bottom:44px;}
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:.75rem;
    font-weight:700;
    letter-spacing:2px;
    color:var(--star);
    text-transform:uppercase;
    margin-bottom:10px;
  }
  .eyebrow::before{
    content:"";
    width:22px;
    height:2px;
    border-radius:2px;
    background:var(--grad);
  }
  .section-title{
    font-size:clamp(1.5rem,3vw,2.1rem);
    letter-spacing:-.2px;
  }
  .section-sub{
    margin-top:10px;
    color:var(--text-2);
    font-size:.95rem;
    max-width:640px;
  }
  .divider{
    height:1px;
    background:linear-gradient(90deg,rgba(24,200,192,.5),rgba(231,228,245,0));
    margin:18px 0 0;
    border:0;
  }

  /* ============ Hero ============ */
  .hero{
    position:relative;
    padding:36px 0 44px;
    overflow:hidden;
  }
  .hero::before{
    content:"";
    position:absolute;
    inset:0;
    background:
      radial-gradient(circle at 12% 18%, rgba(91,52,201,.13), transparent 42%),
      radial-gradient(circle at 88% 8%, rgba(24,200,192,.14), transparent 40%);
    pointer-events:none;
  }
  .hero-grid{
    position:relative;
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
    align-items:center;
  }
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:7fr 5fr;gap:44px;}
  }
  .hero-badge{
    display:inline-flex;
    align-items:center;
    gap:9px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:999px;
    padding:7px 16px 7px 10px;
    font-size:.8rem;
    font-weight:600;
    color:var(--text-2);
    box-shadow:0 6px 18px rgba(42,27,99,.06);
  }
  .hero-badge span.dot{
    width:8px;height:8px;border-radius:50%;
    background:var(--star);
    box-shadow:0 0 0 4px rgba(24,200,192,.18);
  }
  .hero h1{
    margin-top:20px;
    font-size:clamp(2rem,5vw,3.2rem);
    line-height:1.15;
    letter-spacing:-.5px;
  }
  .hero h1 .hl{
    background:linear-gradient(120deg,#5B34C9 0%,#18C8C0 100%);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .hero-sub{
    margin-top:16px;
    font-size:1.05rem;
    color:var(--text-2);
    max-width:520px;
  }
  .hero-actions{
    margin-top:28px;
    display:flex;
    flex-wrap:wrap;
    gap:14px;
  }
  .hero-meta{
    margin-top:26px;
    display:flex;
    flex-wrap:wrap;
    gap:10px 26px;
    font-size:.83rem;
    color:var(--text-3);
  }
  .hero-meta span{display:inline-flex;align-items:center;gap:8px;}
  .hero-meta i{color:var(--star);}

  .hero-visual{
    position:relative;
    border-radius:var(--r-lg);
    overflow:hidden;
    box-shadow:0 24px 60px rgba(42,27,99,.22);
    min-height:280px;
  }
  .hero-visual img{
    width:100%;
    height:100%;
    min-height:280px;
    object-fit:cover;
    aspect-ratio:5/4;
  }
  .hero-visual::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(36,26,85,.18) 0%,rgba(36,26,85,.72) 62%,rgba(36,26,85,.9) 100%);
  }
  .hero-visual-inner{
    position:absolute;
    inset:auto 20px 20px 20px;
    z-index:2;
    color:#fff;
  }
  .hero-visual-inner .tag{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:.75rem;
    font-weight:600;
    background:rgba(255,255,255,.16);
    border:1px solid rgba(255,255,255,.24);
    border-radius:999px;
    padding:5px 13px;
  }
  .hero-visual-inner h2{
    color:#fff;
    font-size:1.15rem;
    margin-top:12px;
  }
  .hero-badges{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:16px;
  }
  .badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    background:rgba(24,200,192,.16);
    border:1px solid rgba(24,200,192,.42);
    color:#fff;
    border-radius:999px;
    padding:6px 14px;
    font-size:.78rem;
    font-weight:600;
  }
  .badge i{font-size:.85rem;color:#7DF3EC;}

  /* ============ 关键词回顾条 ============ */
  .keyword-bar{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:18px 22px;
    box-shadow:var(--shadow-card);
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px 14px;
  }
  .keyword-bar .label{
    font-size:.82rem;
    font-weight:700;
    color:var(--ink);
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding-right:14px;
    border-right:1px solid var(--line);
  }
  .keyword-bar .label i{color:var(--star);}
  .pill{
    display:inline-flex;
    align-items:center;
    gap:7px;
    background:var(--bg);
    border:1px solid var(--line);
    border-radius:999px;
    padding:5px 14px;
    font-size:.8rem;
    color:var(--text-2);
    transition:all .22s var(--ease);
  }
  .pill:hover{border-color:var(--star);color:var(--ink);background:rgba(24,200,192,.1);transform:translateY(-1px);}

  /* ============ 问答主体 ============ */
  .faq-layout{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
    align-items:start;
  }
  @media (min-width:1024px){
    .faq-layout{grid-template-columns:280px minmax(0,1fr);gap:32px;}
  }
  .toc{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:22px 18px;
    box-shadow:var(--shadow-card);
  }
  @media (min-width:1024px){
    .toc{position:sticky;top:128px;}
  }
  .toc h3{
    font-size:.95rem;
    display:flex;
    align-items:center;
    gap:9px;
    padding-bottom:14px;
    margin-bottom:10px;
    border-bottom:1px solid var(--line);
  }
  .toc h3 i{color:var(--star);}
  .toc-list a{
    display:flex;
    align-items:center;
    gap:11px;
    padding:10px 12px;
    border-radius:var(--r-sm);
    font-size:.88rem;
    color:var(--text-2);
    font-weight:500;
  }
  .toc-list a .idx{
    font-size:.72rem;
    font-weight:700;
    color:var(--star);
    letter-spacing:.5px;
  }
  .toc-list a:hover{background:rgba(24,200,192,.11);color:var(--ink);transform:translateX(3px);}
  .toc-foot{
    margin-top:16px;
    padding-top:16px;
    border-top:1px solid var(--line);
    font-size:.8rem;
    color:var(--text-3);
    line-height:1.7;
  }
  .toc-foot a{color:var(--nebula);font-weight:600;}
  .toc-foot a:hover{color:var(--star);}

  .faq-group{margin-bottom:34px;scroll-margin-top:132px;}
  .faq-group:last-child{margin-bottom:0;}
  .group-title{
    display:flex;
    align-items:center;
    gap:12px;
    font-size:1.1rem;
    margin-bottom:14px;
  }
  .group-title .idx{
    display:inline-grid;
    place-items:center;
    width:34px;height:34px;
    border-radius:12px;
    background:var(--grad);
    color:#fff;
    font-size:.8rem;
    font-weight:700;
    letter-spacing:.5px;
    box-shadow:0 8px 18px rgba(91,52,201,.24);
    flex:0 0 auto;
  }

  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .25s var(--ease),background-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease);
  }
  .faq-item:hover{border-color:rgba(24,200,192,.55);box-shadow:var(--shadow-card);}
  .faq-item[open]{
    background:var(--bg);
    border-color:rgba(24,200,192,.55);
    box-shadow:var(--shadow-card);
  }
  .faq-q{
    display:flex;
    align-items:center;
    gap:16px;
    padding:18px 22px;
    font-size:.98rem;
    font-weight:600;
    color:var(--ink);
  }
  .faq-q .qtext{flex:1 1 auto;}
  .faq-plus{
    flex:0 0 auto;
    width:30px;height:30px;
    border-radius:50%;
    background:rgba(24,200,192,.14);
    color:var(--star);
    display:grid;
    place-items:center;
    font-size:.9rem;
    transition:transform .3s var(--ease),background-color .3s var(--ease),color .3s var(--ease);
  }
  .faq-item[open] .faq-plus{transform:rotate(45deg);background:var(--nebula);color:#fff;}
  .faq-a{
    padding:0 22px 20px 22px;
    color:var(--text-2);
    font-size:.93rem;
    line-height:1.9;
  }
  .faq-a strong{color:var(--ink);}
  .faq-steps{
    margin-top:10px;
    display:grid;
    gap:8px;
  }
  .faq-steps li{
    display:flex;
    gap:10px;
    align-items:flex-start;
    font-size:.9rem;
    color:var(--text-2);
  }
  .faq-steps li::before{
    content:"";
    flex:0 0 auto;
    width:7px;height:7px;
    margin-top:11px;
    border-radius:50%;
    background:var(--star);
    box-shadow:0 0 0 3px rgba(24,200,192,.16);
  }

  /* ============ 两列说明卡 ============ */
  .two-col{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
  }
  @media (min-width:768px){
    .two-col{grid-template-columns:1fr 1fr;gap:24px;}
  }
  .info-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:28px;
    box-shadow:var(--shadow-card);
    transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  }
  .info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(24,200,192,.45);}
  .info-card h3{
    font-size:1.1rem;
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:14px;
  }
  .info-card h3 i{color:var(--nebula);}
  .info-list li{
    display:flex;
    gap:12px;
    padding:11px 0;
    border-top:1px dashed var(--line);
    font-size:.92rem;
    color:var(--text-2);
  }
  .info-list li:first-child{border-top:0;}
  .info-list li b{
    flex:0 0 auto;
    color:var(--ink);
    font-weight:700;
  }
  .info-list li b .num{color:var(--star);}

  /* ============ 分类入口卡 ============ */
  .entry-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
  }
  @media (min-width:768px){
    .entry-grid{grid-template-columns:1fr 1fr;gap:24px;}
  }
  .entry-card{
    display:flex;
    gap:18px;
    align-items:center;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:18px;
    box-shadow:var(--shadow-card);
    transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  }
  .entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(24,200,192,.5);}
  .entry-card img{
    flex:0 0 auto;
    width:104px;
    height:104px;
    object-fit:cover;
    border-radius:var(--r-md);
    aspect-ratio:1/1;
  }
  .entry-card .entry-body{min-width:0;}
  .entry-card .cap{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:.72rem;
    font-weight:700;
    color:var(--nebula);
    background:rgba(91,52,201,.1);
    border-radius:999px;
    padding:4px 12px;
  }
  .entry-card h3{
    font-size:1.02rem;
    margin-top:9px;
  }
  .entry-card p{
    margin-top:7px;
    font-size:.86rem;
    color:var(--text-2);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .entry-card .arrow{
    margin-top:12px;
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:.84rem;
    font-weight:700;
    color:var(--star);
  }
  .entry-card:hover .arrow{gap:12px;color:var(--nebula);}

  /* ============ CTA 条 ============ */
  .cta-band{
    position:relative;
    background:var(--ink);
    border-radius:var(--r-lg);
    padding:38px 28px;
    overflow:hidden;
    box-shadow:0 20px 50px rgba(36,26,85,.28);
  }
  .cta-band::before{
    content:"";
    position:absolute;
    inset:0;
    background:
      radial-gradient(circle at 88% 12%, rgba(24,200,192,.34), transparent 46%),
      radial-gradient(circle at 6% 90%, rgba(91,52,201,.5), transparent 48%);
    pointer-events:none;
  }
  .cta-inner{
    position:relative;
    display:flex;
    flex-wrap:wrap;
    gap:22px;
    align-items:center;
    justify-content:space-between;
  }
  .cta-inner h2{color:#fff;font-size:clamp(1.3rem,2.6vw,1.75rem);}
  .cta-inner p{color:rgba(255,255,255,.72);font-size:.92rem;margin-top:9px;max-width:520px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
  .cta-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
  .cta-actions .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:var(--star);color:#fff;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink);
    color:rgba(255,255,255,.78);
    margin-top:56px;
    position:relative;
  }
  .footer-bar{
    height:4px;
    background:var(--grad);
  }
  .site-footer .container{padding-top:52px;padding-bottom:26px;}
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
  }
  @media (min-width:640px){
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (min-width:1024px){
    .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
  }
  .footer-brand{
    display:flex;
    align-items:center;
    gap:11px;
    font-size:1.05rem;
    font-weight:700;
    color:#fff;
  }
  .footer-brand .brand-mark{width:38px;height:38px;font-size:16px;}
  .footer-about{
    margin-top:16px;
    font-size:.86rem;
    line-height:1.9;
    color:rgba(255,255,255,.62);
    max-width:360px;
  }
  .footer-col h4{
    color:#fff;
    font-size:.95rem;
    margin-bottom:16px;
  }
  .footer-links{display:grid;gap:11px;}
  .footer-links a{
    font-size:.86rem;
    color:rgba(255,255,255,.66);
  }
  .footer-links a:hover{color:var(--star);transform:translateX(2px);}
  .footer-contact{display:grid;gap:12px;}
  .footer-contact li{
    display:flex;
    gap:11px;
    align-items:flex-start;
    font-size:.85rem;
    color:rgba(255,255,255,.66);
  }
  .footer-contact i{color:var(--star);margin-top:6px;font-size:.82rem;}
  .footer-bottom{
    margin-top:40px;
    padding-top:20px;
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    justify-content:space-between;
    font-size:.8rem;
    color:rgba(255,255,255,.5);
  }
  .footer-bottom .num{letter-spacing:.6px;}

  /* ============ 移动端底部操作条 ============ */
  .mobile-bar{
    display:none;
  }
  @media (max-width:767px){
    .mobile-bar{
      display:flex;
      position:fixed;
      left:0;right:0;bottom:0;
      z-index:70;
      gap:10px;
      padding:10px 14px calc(10px + env(safe-area-inset-bottom));
      background:rgba(255,255,255,.96);
      border-top:1px solid var(--line);
      box-shadow:0 -8px 24px rgba(42,27,99,.1);
    }
    .mobile-bar .btn{flex:1 1 auto;}
    body{padding-bottom:76px;}
  }

/* roulang page: category5 */
:root{
  --ink:#241A55; --nebula:#5B34C9; --star:#18C8C0; --glow:#F5A623;
  --bg:#F6F5FC; --surface:#FFFFFF; --line:#E7E4F5;
  --text:#1A1730; --text-2:#5A5671; --text-3:#8B87A3;
  --r-lg:24px; --r-md:16px; --r-sm:12px;
  --sh-1:0 8px 30px rgba(42,27,99,.08);
  --sh-2:0 16px 40px rgba(42,27,99,.14);
  --grad:linear-gradient(120deg,#2A1B63 0%,#5B34C9 45%,#18C8C0 100%);
  --font:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:110px;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  padding-bottom:72px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none;margin:0;padding:0}
:focus-visible{outline:2px solid var(--star);outline-offset:2px;border-radius:8px}
::selection{background:rgba(24,200,192,.28)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#EFEDF9}
::-webkit-scrollbar-thumb{background:#CFC9E9;border-radius:99px;border:2px solid #EFEDF9}
::-webkit-scrollbar-thumb:hover{background:var(--nebula)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;padding:12px 0 10px;
  background:linear-gradient(180deg,#F6F5FC 68%,rgba(246,245,252,0));
}
.nav-panel{
  display:flex;align-items:center;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:10px 14px;box-shadow:var(--sh-1);
  transition:background .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink);white-space:nowrap;flex:none}
.brand-mark{
  width:38px;height:38px;border-radius:var(--r-sm);background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:16px;box-shadow:0 6px 16px rgba(91,52,201,.28);flex:none;
}
.brand-text{letter-spacing:.01em}
.nav-links{display:none;flex:1;align-items:center;justify-content:center;gap:4px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-item{
  display:inline-flex;align-items:center;gap:7px;padding:9px 12px;border-radius:var(--r-md);
  font-size:14px;color:var(--text-2);white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-item i{font-size:14px;color:var(--text-3);transition:color .2s ease}
.nav-item:hover{background:rgba(24,200,192,.12);color:var(--nebula);transform:translateY(-2px)}
.nav-item:hover i{color:var(--star)}
.nav-item.active{background:rgba(24,200,192,.14);color:var(--nebula);font-weight:600}
.nav-item.active i{color:var(--star)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-actions .btn{display:none}
@media (min-width:1024px){.nav-actions .btn{display:inline-flex}}
.nav-toggle{
  width:42px;height:42px;border-radius:14px;border:1px solid var(--line);background:#fff;
  color:var(--ink);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(24,200,192,.12);border-color:var(--star);transform:translateY(-2px)}
@media (min-width:1024px){.nav-toggle{display:none}}
.mobile-drawer{
  display:none;margin-top:12px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:14px;
}
.mobile-drawer.open{display:block}
.mobile-drawer a{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:14px;
  font-size:15px;color:var(--text-2);
}
.mobile-drawer a i{color:var(--text-3);width:18px;text-align:center}
.mobile-drawer a:hover,.mobile-drawer a.active{background:rgba(24,200,192,.12);color:var(--nebula)}
.mobile-drawer a:hover i,.mobile-drawer a.active i{color:var(--star)}
@media (min-width:1024px){.mobile-drawer{display:none !important}}
.site-header.is-scrolled .nav-panel{
  background:var(--ink);border-color:rgba(255,255,255,.14);box-shadow:0 16px 40px rgba(36,26,85,.34);
}
.site-header.is-scrolled .brand{color:#fff}
.site-header.is-scrolled .nav-item{color:rgba(255,255,255,.76)}
.site-header.is-scrolled .nav-item i{color:rgba(255,255,255,.5)}
.site-header.is-scrolled .nav-item:hover{background:rgba(24,200,192,.2);color:#fff}
.site-header.is-scrolled .nav-item.active{background:rgba(24,200,192,.24);color:#fff}
.site-header.is-scrolled .nav-toggle{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.22);color:#fff}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;
  border-radius:var(--r-md);padding:12px 22px;font-weight:600;font-size:15px;line-height:1.2;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(91,52,201,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(91,52,201,.36)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(91,52,201,.26)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--star);color:var(--nebula);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(20,12,50,.28)}
.btn-outline-light{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.26)}
.btn-outline-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:14px}
.btn-block{width:100%}
.btn:disabled{background:#E4E2EF;color:#A9A6BC;box-shadow:none;cursor:not-allowed;opacity:.6;transform:none}

/* ---------- 通用 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:7px;background:rgba(24,200,192,.12);color:#0E8F8A;
  border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;
}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--nebula)}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:99px;background:var(--grad)}
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
.section-head{margin-bottom:32px;max-width:760px}
@media (min-width:768px){.section-head{margin-bottom:44px}}
.sec-title{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700;line-height:1.3;margin:12px 0 12px;color:var(--ink)}
.sec-sub{color:var(--text-2);font-size:15.5px;margin:0}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(24,200,192,.55)}
.star-list li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--text-2);font-size:15px}
.star-list li:last-child{margin-bottom:0}
.star-list li::before{
  content:"";position:absolute;left:6px;top:12px;width:7px;height:7px;
  background:var(--star);border-radius:2px;transform:rotate(45deg);
}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:26px 0 8px}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 12% 22%, rgba(24,200,192,.22) 0 2px, transparent 3px),
    radial-gradient(circle at 72% 10%, rgba(91,52,201,.18) 0 2px, transparent 3px),
    radial-gradient(circle at 46% 78%, rgba(245,166,35,.18) 0 2px, transparent 3px);
  background-size:220px 220px,300px 300px,260px 260px;
}
.hero > .container{position:relative;z-index:1}
.hero-grid{display:grid;gap:28px;grid-template-columns:1fr}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;align-items:center;gap:44px}}
.hero-title{
  font-size:clamp(2rem,5vw,3.4rem);font-weight:700;line-height:1.15;letter-spacing:-.01em;
  margin:18px 0 14px;color:var(--ink);
}
.hero-title em{font-style:normal;color:var(--nebula)}
.hero-sub{font-size:17px;color:var(--text-2);margin:0 0 26px;max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.badge-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.stat-badge{
  display:inline-flex;align-items:center;gap:10px;background:rgba(24,200,192,.12);
  border-radius:999px;padding:9px 16px;font-size:13px;color:#0E8F8A;
}
.stat-badge i{font-size:14px;color:var(--star)}
.stat-badge b{font-weight:700;color:var(--ink);font-size:15px;font-variant-numeric:tabular-nums}
.hero-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;padding:22px;
  background-image:linear-gradient(160deg,rgba(36,26,85,.72) 0%,rgba(91,52,201,.6) 55%,rgba(24,200,192,.5) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--sh-2);display:flex;flex-direction:column;gap:16px;
}
.visual-img{width:100%;height:150px;object-fit:cover;border-radius:var(--r-md)}
.visual-kicker{margin:0;font-size:13px;letter-spacing:.14em;color:rgba(255,255,255,.72)}
.visual-title{margin:6px 0 0;color:#fff;font-size:1.25rem;font-weight:700;line-height:1.4}
.visual-stats{display:flex;flex-wrap:wrap;gap:10px}
.visual-chip{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:8px 14px;
  font-size:13px;color:#fff;
}
.visual-chip b{font-variant-numeric:tabular-nums;font-size:14px}

/* ---------- 问题类型 ---------- */
.type-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.type-grid{grid-template-columns:repeat(2,1fr)}}
.type-card{padding:24px;display:flex;flex-direction:column;gap:12px}
.type-icon{
  width:44px;height:44px;border-radius:14px;background:rgba(24,200,192,.14);color:#0E8F8A;
  display:grid;place-items:center;font-size:18px;
}
.type-card h3{margin:0;font-size:1.125rem;font-weight:700;color:var(--ink)}
.type-card p{margin:0;font-size:15px;color:var(--text-2)}
.type-hint{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--nebula);font-weight:600;
}

/* ---------- 求助表单 ---------- */
.assist-grid{display:grid;gap:22px;grid-template-columns:1fr}
@media (min-width:1024px){.assist-grid{grid-template-columns:8fr 4fr;align-items:start}}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:22px}
@media (min-width:768px){.form-card{padding:30px}}
.steps{display:flex;gap:10px;margin:0 0 26px;overflow-x:auto;padding-bottom:4px}
.steps li{display:flex;align-items:center;gap:10px;min-width:132px;flex:1}
.step-dot{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;flex:none;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
  background:#fff;border:1px solid var(--line);color:var(--text-3);
}
.steps li.is-active .step-dot{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 8px 18px rgba(91,52,201,.26)}
.step-label{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.steps li.is-active .step-label{color:var(--ink);font-weight:600}
.fset{border:0;padding:0;margin:0 0 24px}
.fset:last-of-type{margin-bottom:8px}
.fset > h3{
  display:flex;align-items:center;gap:10px;margin:0 0 16px;font-size:15px;font-weight:700;color:var(--ink);
}
.fset > h3::before{content:"";width:4px;height:16px;border-radius:99px;background:var(--star)}
.field-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:768px){.field-grid{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:8px}
.field.wide{grid-column:1/-1}
.field label{font-size:14px;color:var(--text-2);font-weight:600}
.field .req{color:var(--nebula)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 16px;border-radius:var(--r-md);border:1px solid var(--line);background:#fff;
  font-size:15px;line-height:1.6;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:128px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--nebula);box-shadow:0 0 0 3px rgba(24,200,192,.2);
}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235A5671' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;padding-right:44px;
}
.form-note{font-size:13px;color:var(--text-3);line-height:1.75;margin:14px 0 0}
.form-tip{
  display:none;align-items:center;gap:10px;margin-top:16px;padding:12px 16px;border-radius:14px;
  background:rgba(24,200,192,.12);color:#0E8F8A;font-size:14px;
}
.form-tip.show{display:flex}

/* ---------- 联系卡 ---------- */
.contact-card{
  position:relative;overflow:hidden;background:var(--ink);color:rgba(255,255,255,.8);
  border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh-2);
}
.contact-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad)}
.contact-title{color:#fff;font-size:1.125rem;font-weight:700;margin:6px 0 8px}
.contact-desc{margin:0 0 20px;font-size:14px;color:rgba(255,255,255,.66)}
.contact-list{display:flex;flex-direction:column;gap:14px;margin-bottom:22px}
.contact-list li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:rgba(255,255,255,.78)}
.contact-list i{color:var(--star);margin-top:4px;width:16px;text-align:center}
.contact-list b{color:#fff;font-variant-numeric:tabular-nums}
.contact-divider{height:1px;background:rgba(255,255,255,.14);margin:0 0 20px}

/* ---------- 提示双卡 ---------- */
.tips-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:900px){.tips-grid{grid-template-columns:1fr 1fr}}
.tip-card{padding:26px}
.tip-card h3{margin:0 0 14px;font-size:1.125rem;color:var(--ink);font-weight:700}
.tip-meta{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);
  margin-top:16px;
}
.tip-meta i{color:var(--star)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(24,200,192,.5)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:15.5px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{font-size:16px;color:var(--text-3);transition:transform .24s ease,color .24s ease;flex:none}
.faq-item[open]{background:var(--bg)}
.faq-item[open] summary i{transform:rotate(45deg);color:var(--nebula)}
.faq-body{padding:0 20px 20px;font-size:15px;color:var(--text-2)}

/* ---------- CTA ---------- */
.cta-band{padding:10px 0 60px}
@media (min-width:768px){.cta-band{padding:20px 0 80px}}
.cta-card{
  background:var(--grad);border-radius:var(--r-lg);padding:32px 26px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  box-shadow:0 20px 46px rgba(42,27,99,.28);
}
@media (min-width:768px){.cta-card{padding:40px 44px}}
.cta-card h2{margin:0 0 8px;font-size:clamp(1.35rem,2.6vw,1.9rem);font-weight:700;line-height:1.35}
.cta-card p{margin:0;color:rgba(255,255,255,.82);font-size:15px;max-width:520px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);margin-top:12px}
.footer-bar{height:4px;background:var(--grad)}
.footer-grid{display:grid;gap:30px;grid-template-columns:1fr;padding:52px 0 34px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-about{margin:0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px}
.footer-col h4{margin:0 0 14px;color:#fff;font-size:15px;font-weight:700}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.68)}
.footer-links a:hover{color:var(--star)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:rgba(255,255,255,.68)}
.footer-contact i{color:var(--star);margin-top:4px;width:16px;text-align:center}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .num{letter-spacing:.04em}

/* ---------- 移动端操作条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(36,26,85,.97);border-top:1px solid rgba(255,255,255,.14);
}
.mobile-bar span{color:rgba(255,255,255,.82);font-size:13px}
@media (min-width:1024px){.mobile-bar{display:none}}
@media (min-width:1024px){body{padding-bottom:0}}