:root{
    --bg:#f4f7fb;
    --card:#ffffff;
    --blue:#2f6bff;
    --blue-soft:#e8f0ff;
    --ink:#1c2434;
    --ink-2:#5a6478;
    --line:#e3e9f3;
    --radius:14px;
    --shadow:0 2px 10px rgba(38,66,120,.06);
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
    background:var(--bg);color:var(--ink);line-height:1.65;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  .wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 20px;}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.94);
    backdrop-filter:saturate(160%) blur(8px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    max-width:1140px;margin:0 auto;padding:12px 20px;
    display:flex;align-items:center;gap:18px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand img{height:32px;width:auto;}
  .brand-name{font-size:17px;font-weight:700;letter-spacing:.5px;white-space:nowrap;}
  .nav{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:nowrap;}
  .nav-link{
    position:relative;padding:8px 11px;font-size:14px;color:var(--ink-2);
    border-radius:8px;white-space:nowrap;transition:color .2s;
  }
  .nav-link:hover{color:var(--blue);}
  .nav-link::after{
    content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
    background:var(--blue);border-radius:2px;transform:scaleX(0);
    transition:transform .22s ease;transform-origin:center;
  }
  .nav-link.active{color:var(--blue);font-weight:600;}
  .nav-link.active::after{transform:scaleX(1);}
  .header-dl{
    flex-shrink:0;background:var(--blue);color:#fff;font-size:14px;font-weight:600;
    padding:9px 20px;border-radius:10px;transition:transform .18s, box-shadow .18s;
  }
  .header-dl:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(47,107,255,.3);}
  .menu-btn{
    display:none;width:40px;height:38px;border:1px solid var(--line);background:#fff;
    border-radius:10px;cursor:pointer;flex-direction:column;justify-content:center;
    align-items:center;gap:4px;
  }
  .menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
  .mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;}
  .mobile-panel a{
    display:block;padding:12px 22px;font-size:15px;color:var(--ink-2);
    border-bottom:1px solid #f0f4fa;
  }
  .mobile-panel a:last-child{border-bottom:none;}
  .mobile-panel.open{display:block;}

  /* ---------- Hero ---------- */
  .hero{padding:44px 0 30px;}
  .hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;}
  .hero-copy h1{font-size:34px;line-height:1.32;letter-spacing:-.5px;}
  .hero-copy h1 em{font-style:normal;color:var(--blue);}
  .hero-copy p{margin-top:14px;color:var(--ink-2);font-size:15.5px;}
  .hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
  .pill{
    display:inline-block;padding:4px 11px;border-radius:999px;
    background:var(--blue-soft);color:var(--blue);font-size:12.5px;font-weight:600;
  }
  .hero-visual{position:relative;}
  .hero-visual img{width:100%;border-radius:18px;box-shadow:0 14px 34px rgba(28,50,100,.16);}

  /* ---------- Download panel ---------- */
  .panel{
    background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
    border:1px solid var(--line);overflow:hidden;
  }
  .panel-head{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:14px 18px;border-bottom:1px solid var(--line);
  }
  .panel-title{font-size:15px;font-weight:700;}
  .panel-title small{font-weight:500;color:var(--ink-2);font-size:12.5px;margin-left:6px;}
  .dot-live{
    width:8px;height:8px;border-radius:50%;background:var(--blue);display:inline-block;
    margin-right:6px;animation:pulse 1.8s infinite;
  }
  @keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
  .task{
    display:grid;grid-template-columns:40px 1fr;gap:14px;
    padding:14px 18px;border-bottom:1px solid #f2f6fc;
  }
  .task:last-child{border-bottom:none;}
  .task-thumb{
    width:40px;height:52px;border-radius:6px;object-fit:cover;background:#eef3fb;
  }
  .task-body{min-width:0;}
  .task-line{display:flex;align-items:center;justify-content:space-between;gap:10px;}
  .task-name{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .task-meta{display:flex;align-items:center;gap:8px;margin-top:5px;flex-wrap:wrap;}
  .size-tag{
    background:var(--blue-soft);color:#2454c8;font-size:11.5px;font-weight:600;
    padding:1px 8px;border-radius:999px;
  }
  .meta-text{font-size:12px;color:var(--ink-2);}
  .bar{
    margin-top:9px;height:5px;background:#e9eff8;border-radius:999px;overflow:hidden;
  }
  .bar i{display:block;height:100%;background:var(--blue);border-radius:999px;}
  .bar.wait i{background:#c3cfe3;}
  .pct{font-size:12.5px;font-weight:700;color:var(--blue);flex-shrink:0;}
  .pct.pending{color:var(--ink-2);font-weight:600;}

  /* ---------- Section base ---------- */
  .section{padding:46px 0;}
  .sec-head{margin-bottom:24px;}
  .sec-head h2{font-size:24px;letter-spacing:-.3px;}
  .sec-head p{margin-top:8px;color:var(--ink-2);font-size:14.5px;max-width:640px;}
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}

  /* ---------- Poster cards ---------- */
  .poster-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow);overflow:hidden;transition:transform .2s,box-shadow .2s;
  }
  .poster-card:hover{transform:translateY(-3px);box-shadow:0 10px 22px rgba(38,66,120,.12);}
  .poster-card .cover{width:100%;aspect-ratio:3/4;object-fit:cover;background:#eef3fb;}
  .poster-card .body{padding:12px 14px 15px;}
  .poster-card h3{font-size:14.5px;font-weight:700;margin-bottom:8px;}
  .card-tags{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}

  /* ---------- Library banner ---------- */
  .library-banner{margin-top:22px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
  .library-banner img{width:100%;height:auto;}

  /* ---------- Ranking ---------- */
  .rank-list{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;}
  .rank-row{
    display:grid;grid-template-columns:34px 44px 1fr auto;gap:14px;align-items:center;
    padding:14px 20px;border-bottom:1px solid #f2f6fc;
  }
  .rank-row:last-child{border-bottom:none;}
  .rank-no{font-size:17px;font-weight:800;color:#bcc8dc;}
  .rank-row:nth-child(1) .rank-no{color:var(--blue);}
  .rank-row img{width:44px;height:58px;border-radius:6px;object-fit:cover;}
  .rank-name{font-size:14.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .rank-sub{font-size:12px;color:var(--ink-2);margin-top:3px;}
  .rank-progress{display:flex;align-items:center;gap:9px;flex-shrink:0;}
  .rank-progress .bar{width:70px;margin:0;}

  /* ---------- Channel ---------- */
  .channel-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;box-shadow:var(--shadow);
  }
  .channel-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top;background:#eef3fb;}
  .channel-card .body{padding:13px 15px 16px;}
  .channel-card h3{font-size:15px;margin-bottom:5px;}
  .channel-card p{font-size:13px;color:var(--ink-2);}

  /* ---------- Guide ---------- */
  .guide-layout{display:grid;grid-template-columns:300px 1fr;gap:26px;align-items:start;}
  .guide-phone{
    border-radius:22px;overflow:hidden;border:6px solid #1c2434;box-shadow:0 14px 30px rgba(20,36,70,.18);
    background:#000;
  }
  .guide-phone img{width:100%;}
  .step-list{display:flex;flex-direction:column;gap:12px;}
  .step{
    display:grid;grid-template-columns:30px 1fr;gap:14px;
    background:var(--card);border:1px solid var(--line);border-radius:12px;
    padding:14px 16px;box-shadow:var(--shadow);
  }
  .step-no{
    width:28px;height:28px;border-radius:8px;background:var(--blue-soft);color:var(--blue);
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13.5px;
  }
  .step h3{font-size:14.5px;margin-bottom:4px;}
  .step p{font-size:13px;color:var(--ink-2);}
  .step p b{color:var(--ink);font-weight:600;}

  /* ---------- FAQ ---------- */
  .faq-group{margin-bottom:26px;}
  .faq-group h3{
    font-size:15px;color:var(--blue);font-weight:700;margin-bottom:12px;
    padding-left:10px;border-left:3px solid var(--blue);
  }
  .faq-item{
    background:var(--card);border:1px solid var(--line);border-radius:12px;
    padding:13px 16px;margin-bottom:10px;
  }
  .faq-item strong{display:block;font-size:14px;margin-bottom:5px;}
  .faq-item p{font-size:13.5px;color:var(--ink-2);}
  .faq-table{
    width:100%;border-collapse:collapse;margin-top:10px;font-size:13px;
    background:#fbfcff;border-radius:8px;overflow:hidden;
  }
  .faq-table th,.faq-table td{
    padding:8px 10px;text-align:left;border-bottom:1px solid var(--line);
  }
  .faq-table th{background:var(--blue-soft);color:#2454c8;font-weight:600;}
  .faq-table tr:last-child td{border-bottom:none;}
  .faq-shot{margin-top:10px;border-radius:10px;border:1px solid var(--line);width:100%;max-width:320px;}

  /* ---------- Download block ---------- */
  .download-block{
    background:var(--card);border:1px solid var(--line);border-radius:18px;
    box-shadow:0 8px 26px rgba(38,66,120,.09);padding:38px 32px;text-align:center;
  }
  .download-block h2{font-size:26px;}
  .download-block p{margin-top:10px;color:var(--ink-2);font-size:15px;}
  .dl-actions{display:flex;justify-content:center;gap:14px;margin-top:24px;flex-wrap:wrap;}
  .btn-main{
    background:var(--blue);color:#fff;font-size:16px;font-weight:600;
    padding:14px 42px;border-radius:12px;transition:transform .18s,box-shadow .18s;
  }
  .btn-main:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(47,107,255,.32);}
  .btn-ghost{
    background:#fff;color:var(--blue);border:1.5px solid var(--blue);font-size:16px;font-weight:600;
    padding:14px 34px;border-radius:12px;transition:background .18s;
  }
  .btn-ghost:hover{background:var(--blue-soft);}
  .dl-note{margin-top:14px;font-size:12.5px;color:#8b95a8;}

  /* ---------- Footer ---------- */
  .site-footer{
    border-top:1px solid var(--line);padding:26px 0 30px;background:#eef3fa;
  }
  .footer-inner{text-align:center;font-size:12.5px;color:#8b95a8;line-height:2;}
  .footer-inner a{color:#8b95a8;border-bottom:1px dotted #b8c3d6;}
  .footer-inner a:hover{color:var(--blue);}

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .hero-grid{grid-template-columns:1fr;gap:26px;}
    .hero-copy h1{font-size:29px;}
    .grid-4{grid-template-columns:repeat(2,1fr);}
    .guide-layout{grid-template-columns:1fr;}
    .guide-phone{max-width:260px;margin:0 auto;}
  }
  @media (max-width:900px){
    .nav,.header-dl{display:none;}
    .menu-btn{display:flex;margin-left:auto;}
  }
  @media (max-width:767px){
    .section{padding:34px 0;}
    .hero{padding:28px 0 16px;}
    .hero-copy h1{font-size:25px;}
    .grid-3{grid-template-columns:1fr;}
    .channel-card img{aspect-ratio:16/10;}
    .panel-title{font-size:14px;}
    .rank-row{grid-template-columns:26px 38px 1fr;gap:10px;padding:12px 14px;}
    .rank-progress{display:none;}
    .rank-row img{width:38px;height:50px;}
    .download-block{padding:28px 18px;}
    .download-block h2{font-size:22px;}
    .btn-main,.btn-ghost{width:100%;padding:13px 0;}
  }