/* roulang page: index */
:root{
      --color-primary:#1457ff;
      --color-primary-dark:#0a38b8;
      --color-primary-soft:#eaf0ff;
      --color-secondary:#ff8a1f;
      --color-secondary-soft:#fff3e8;
      --color-accent:#18b48f;
      --color-accent-soft:#e7fbf5;
      --color-bg:#f6f8fc;
      --color-bg-strong:#eef3ff;
      --color-surface:#ffffff;
      --color-surface-2:#fbfcff;
      --color-ink:#111827;
      --color-text:#2f3a4a;
      --color-muted:#667085;
      --color-light:#94a3b8;
      --color-border:#dde5f2;
      --color-border-strong:#cbd5e1;
      --shadow-sm:0 8px 22px rgba(17,24,39,.06);
      --shadow-md:0 16px 46px rgba(17,24,39,.10);
      --shadow-lg:0 26px 70px rgba(20,87,255,.16);
      --radius-sm:10px;
      --radius-md:16px;
      --radius-lg:24px;
      --radius-xl:34px;
      --container:1180px;
      --space-section:86px;
      --font-main:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    }

    *{box-sizing:border-box;}
    html{scroll-behavior:smooth;}
    body{
      margin:0;
      font-family:var(--font-main);
      color:var(--color-text);
      background:
        radial-gradient(circle at 8% 0%, rgba(20,87,255,.10), transparent 32%),
        radial-gradient(circle at 92% 12%, rgba(255,138,31,.10), transparent 30%),
        linear-gradient(180deg,#fbfcff 0%,var(--color-bg) 48%,#ffffff 100%);
      line-height:1.76;
      letter-spacing:.01em;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition:color .22s ease, background .22s ease, border-color .22s ease, transform .22s ease, box-shadow .22s ease;
    }
    a:hover,a:focus{color:var(--color-primary);}
    img{max-width:100%;height:auto;display:block;}
    button,input,textarea,select{font:inherit;}
    button{cursor:pointer;}
    ::selection{background:rgba(20,87,255,.18);color:var(--color-ink);}
    :focus-visible{
      outline:3px solid rgba(20,87,255,.30);
      outline-offset:3px;
      border-radius:10px;
    }

    .site-shell{overflow:hidden;min-height:100vh;}
    .container{
      width:min(calc(100% - 40px), var(--container));
      margin-inline:auto;
    }
    .section{
      padding:var(--space-section) 0;
      position:relative;
    }
    .section.tight{padding:56px 0;}
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:30px;
      align-items:flex-end;
      margin-bottom:32px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--color-primary);
      background:var(--color-primary-soft);
      border:1px solid rgba(20,87,255,.12);
      border-radius:999px;
      padding:7px 13px;
      font-size:13px;
      font-weight:800;
      line-height:1.2;
      margin-bottom:12px;
    }
    .section-title{
      margin:0;
      color:var(--color-ink);
      font-size:clamp(28px,3.4vw,44px);
      line-height:1.18;
      font-weight:900;
      letter-spacing:-.04em;
    }
    .section-desc{
      margin:12px 0 0;
      color:var(--color-muted);
      max-width:720px;
      font-size:16px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(221,229,242,.86);
      box-shadow:0 10px 28px rgba(15,23,42,.04);
    }
    .brand-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      min-height:72px;
    }
    .brand{
      display:inline-flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:42px;
      height:42px;
      display:grid;
      place-items:center;
      border-radius:15px;
      color:#fff;
      background:
        linear-gradient(135deg,var(--color-primary) 0%,#43a2ff 55%,var(--color-accent) 100%);
      box-shadow:0 14px 30px rgba(20,87,255,.22);
      flex:0 0 auto;
    }
    .brand-name{
      color:var(--color-ink);
      font-size:18px;
      font-weight:900;
      letter-spacing:-.03em;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:480px;
    }
    .header-actions{
      display:flex;
      align-items:center;
      gap:12px;
      flex:0 0 auto;
    }
    .quick-search{
      position:relative;
      width:280px;
    }
    .quick-search i{
      position:absolute;
      left:14px;
      top:50%;
      transform:translateY(-50%);
      color:var(--color-light);
      pointer-events:none;
      font-size:14px;
    }
    .quick-search input{
      width:100%;
      height:42px;
      border:1px solid var(--color-border);
      border-radius:999px;
      padding:0 14px 0 38px;
      background:#fff;
      color:var(--color-text);
      box-shadow:0 6px 18px rgba(15,23,42,.04);
      transition:border-color .22s ease, box-shadow .22s ease;
    }
    .quick-search input:focus{
      border-color:rgba(20,87,255,.55);
      box-shadow:0 0 0 4px rgba(20,87,255,.10);
      outline:none;
    }
    .nav-cta{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      height:42px;
      padding:0 18px;
      border-radius:999px;
      background:var(--color-ink);
      color:#fff;
      font-size:14px;
      font-weight:800;
      border:1px solid rgba(17,24,39,.08);
      box-shadow:0 12px 24px rgba(17,24,39,.14);
    }
    .nav-cta:hover{color:#fff;background:var(--color-primary);transform:translateY(-1px);}
    .chip-nav{
      border-top:1px solid rgba(221,229,242,.76);
      background:rgba(251,252,255,.72);
    }
    .chip-scroll{
      display:flex;
      gap:10px;
      align-items:center;
      overflow-x:auto;
      padding:12px 0;
      scrollbar-width:none;
      -webkit-overflow-scrolling:touch;
    }
    .chip-scroll::-webkit-scrollbar{display:none;}
    .nav-chip{
      display:inline-flex;
      align-items:center;
      gap:8px;
      white-space:nowrap;
      min-height:36px;
      padding:0 15px;
      border-radius:999px;
      border:1px solid var(--color-border);
      color:var(--color-muted);
      background:#fff;
      font-weight:800;
      font-size:14px;
    }
    .nav-chip:hover{
      color:var(--color-primary);
      border-color:rgba(20,87,255,.28);
      background:var(--color-primary-soft);
      transform:translateY(-1px);
    }
    .nav-chip.active{
      color:#fff;
      border-color:var(--color-primary);
      background:linear-gradient(135deg,var(--color-primary),#3a85ff);
      box-shadow:0 10px 24px rgba(20,87,255,.20);
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:48px;
      padding:0 22px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:900;
      font-size:15px;
      line-height:1;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease;
      user-select:none;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),#3a85ff);
      box-shadow:0 16px 36px rgba(20,87,255,.25);
    }
    .btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 22px 44px rgba(20,87,255,.32);}
    .btn-secondary{
      color:var(--color-ink);
      background:#fff;
      border-color:var(--color-border);
      box-shadow:0 10px 24px rgba(15,23,42,.07);
    }
    .btn-secondary:hover{color:var(--color-primary);border-color:rgba(20,87,255,.35);transform:translateY(-2px);}
    .btn-ghost{
      color:var(--color-primary);
      background:var(--color-primary-soft);
      border-color:rgba(20,87,255,.12);
    }
    .btn-ghost:hover{background:#fff;color:var(--color-primary-dark);transform:translateY(-2px);}
    .btn-warning{
      color:#fff;
      background:linear-gradient(135deg,var(--color-secondary),#ffb25f);
      box-shadow:0 16px 34px rgba(255,138,31,.25);
    }
    .btn-warning:hover{color:#fff;transform:translateY(-2px);box-shadow:0 20px 42px rgba(255,138,31,.32);}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:7px;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:900;
      background:var(--color-accent-soft);
      color:#087b64;
      border:1px solid rgba(24,180,143,.16);
    }

    .hero{
      padding:46px 0 70px;
    }
    .hero-board{
      position:relative;
      display:grid;
      grid-template-columns:1fr;
      min-height:560px;
      border-radius:var(--radius-xl);
      overflow:hidden;
      background:
        linear-gradient(110deg,rgba(9,20,48,.92),rgba(20,87,255,.82)),
        radial-gradient(circle at 80% 18%,rgba(255,138,31,.55),transparent 28%);
      box-shadow:var(--shadow-lg);
      border:1px solid rgba(255,255,255,.22);
    }
    .hero-board:before{
      content:"";
      position:absolute;
      inset:0;
      background:
        linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px),
        linear-gradient(180deg,rgba(255,255,255,.08) 1px,transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(90deg,#000,transparent 75%);
      opacity:.45;
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(340px,.72fr);
      gap:34px;
      align-items:stretch;
      padding:44px;
    }
    .hero-copy{
      display:flex;
      flex-direction:column;
      justify-content:center;
      color:#fff;
      max-width:720px;
    }
    .hero-label{
      display:inline-flex;
      align-items:center;
      gap:9px;
      width:max-content;
      padding:8px 13px;
      border-radius:999px;
      background:rgba(255,255,255,.12);
      color:#eff6ff;
      border:1px solid rgba(255,255,255,.18);
      backdrop-filter:blur(10px);
      font-size:13px;
      font-weight:900;
      margin-bottom:18px;
    }
    h1{
      margin:0;
      font-size:clamp(36px,5.1vw,72px);
      line-height:1.05;
      font-weight:950;
      letter-spacing:-.06em;
      color:#fff;
    }
    .hero-copy p{
      margin:20px 0 0;
      max-width:690px;
      color:rgba(255,255,255,.82);
      font-size:18px;
      line-height:1.85;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:30px;
    }
    .hero-actions .btn-secondary{
      background:rgba(255,255,255,.12);
      color:#fff;
      border-color:rgba(255,255,255,.22);
      box-shadow:none;
      backdrop-filter:blur(10px);
    }
    .hero-actions .btn-secondary:hover{
      background:#fff;
      color:var(--color-primary);
    }
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:14px;
      margin-top:34px;
      max-width:720px;
    }
    .metric-tile{
      padding:16px;
      border-radius:18px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.16);
      backdrop-filter:blur(12px);
    }
    .metric-num{
      display:block;
      font-size:24px;
      font-weight:950;
      color:#fff;
      line-height:1.1;
    }
    .metric-text{
      display:block;
      margin-top:5px;
      color:rgba(255,255,255,.70);
      font-size:13px;
      font-weight:700;
    }
    .hero-card{
      align-self:center;
      background:rgba(255,255,255,.96);
      border-radius:28px;
      padding:24px;
      color:var(--color-text);
      box-shadow:0 24px 70px rgba(0,0,0,.22);
      border:1px solid rgba(255,255,255,.52);
    }
    .course-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:18px;
    }
    .course-icon{
      width:54px;
      height:54px;
      border-radius:18px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--color-secondary),#ffcc78);
      box-shadow:0 14px 30px rgba(255,138,31,.28);
      font-size:22px;
      flex:0 0 auto;
    }
    .course-status{
      color:#7c4a07;
      background:var(--color-secondary-soft);
      border:1px solid rgba(255,138,31,.18);
      border-radius:999px;
      padding:7px 11px;
      font-size:12px;
      font-weight:900;
      white-space:nowrap;
    }
    .hero-card h2{
      margin:0;
      color:var(--color-ink);
      font-size:25px;
      line-height:1.25;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .hero-card .card-intro{
      margin:12px 0 18px;
      color:var(--color-muted);
      font-size:15px;
    }
    .lesson-list{
      display:grid;
      gap:10px;
      margin:0 0 20px;
      padding:0;
      list-style:none;
    }
    .lesson-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:12px;
      border-radius:16px;
      background:var(--color-surface-2);
      border:1px solid var(--color-border);
      color:var(--color-text);
      font-size:14px;
      font-weight:700;
    }
    .lesson-list i{color:var(--color-accent);margin-top:5px;}
    .mini-progress{
      margin:18px 0;
      padding:15px;
      border-radius:18px;
      background:linear-gradient(135deg,var(--color-primary-soft),#fff);
      border:1px solid rgba(20,87,255,.12);
    }
    .progress-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      color:var(--color-ink);
      font-size:13px;
      font-weight:900;
      margin-bottom:10px;
    }
    .progress-bar{
      height:9px;
      border-radius:999px;
      background:#dbe5ff;
      overflow:hidden;
    }
    .progress-bar span{
      display:block;
      height:100%;
      width:68%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--color-primary),var(--color-accent));
    }
    .hero-card-actions{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:10px;
    }

    .play-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:24px;
      align-items:stretch;
    }
    .feature-panel{
      background:var(--color-surface);
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      padding:30px;
      position:relative;
      overflow:hidden;
    }
    .feature-panel:after{
      content:"";
      position:absolute;
      width:220px;
      height:220px;
      right:-90px;
      bottom:-100px;
      background:radial-gradient(circle,rgba(20,87,255,.12),transparent 68%);
      pointer-events:none;
    }
    .feature-panel h3{
      color:var(--color-ink);
      font-weight:950;
      font-size:26px;
      line-height:1.25;
      margin:0 0 12px;
      letter-spacing:-.03em;
    }
    .feature-panel p{color:var(--color-muted);margin:0 0 20px;}
    .check-list{
      display:grid;
      gap:12px;
      list-style:none;
      padding:0;
      margin:0;
    }
    .check-list li{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:13px 14px;
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:16px;
    }
    .check-list i{
      color:#fff;
      width:22px;
      height:22px;
      display:grid;
      place-items:center;
      border-radius:50%;
      background:var(--color-accent);
      font-size:12px;
      flex:0 0 auto;
      margin-top:3px;
    }
    .step-stack{
      display:grid;
      gap:14px;
    }
    .step-card{
      display:grid;
      grid-template-columns:52px 1fr;
      gap:14px;
      align-items:start;
      padding:20px;
      border-radius:20px;
      background:var(--color-surface);
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
    }
    .step-num{
      width:52px;
      height:52px;
      display:grid;
      place-items:center;
      border-radius:18px;
      background:var(--color-primary-soft);
      color:var(--color-primary);
      font-size:18px;
      font-weight:950;
    }
    .step-card h4{
      margin:0 0 5px;
      color:var(--color-ink);
      font-size:18px;
      font-weight:950;
    }
    .step-card p{
      margin:0;
      color:var(--color-muted);
      font-size:14px;
    }
    .step-card:hover,.reward-card:hover,.topic-tag:hover,.case-card:hover,.price-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-md);
      border-color:rgba(20,87,255,.26);
    }

    .reward-section{
      background:linear-gradient(180deg,rgba(234,240,255,.68),rgba(255,255,255,.34));
    }
    .reward-layout{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .reward-card{
      min-height:210px;
      padding:22px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
      transition:.22s ease;
    }
    .reward-card.featured{
      grid-column:span 2;
      background:
        linear-gradient(135deg,rgba(20,87,255,.96),rgba(24,180,143,.90)),
        radial-gradient(circle at 95% 12%,rgba(255,255,255,.22),transparent 30%);
      color:#fff;
      border-color:rgba(255,255,255,.20);
    }
    .reward-card .icon{
      width:46px;
      height:46px;
      display:grid;
      place-items:center;
      border-radius:16px;
      background:var(--color-primary-soft);
      color:var(--color-primary);
      margin-bottom:18px;
      font-size:19px;
    }
    .reward-card.featured .icon{background:rgba(255,255,255,.16);color:#fff;}
    .reward-card h3{
      margin:0 0 8px;
      color:var(--color-ink);
      font-size:20px;
      font-weight:950;
    }
    .reward-card.featured h3,.reward-card.featured p{color:#fff;}
    .reward-card p{
      margin:0;
      color:var(--color-muted);
      font-size:14px;
    }
    .reward-number{
      display:block;
      margin:18px 0 6px;
      font-size:34px;
      line-height:1;
      font-weight:950;
      color:var(--color-ink);
      letter-spacing:-.05em;
    }
    .reward-card.featured .reward-number{color:#fff;}

    .progress-panel{
      display:grid;
      grid-template-columns:.9fr 1.1fr;
      gap:24px;
      align-items:stretch;
    }
    .deadline-card{
      padding:30px;
      border-radius:var(--radius-lg);
      color:#fff;
      background:
        linear-gradient(145deg,#0f172a,#173d90 70%,#2364ff);
      box-shadow:var(--shadow-lg);
      position:relative;
      overflow:hidden;
    }
    .deadline-card:after{
      content:"";
      position:absolute;
      width:260px;
      height:260px;
      border-radius:50%;
      right:-120px;
      top:-80px;
      background:rgba(255,255,255,.12);
    }
    .deadline-card h3{
      position:relative;
      margin:0 0 12px;
      color:#fff;
      font-size:28px;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .deadline-card p{
      position:relative;
      margin:0;
      color:rgba(255,255,255,.76);
    }
    .countdown{
      position:relative;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:10px;
      margin:24px 0;
    }
    .count-box{
      text-align:center;
      border-radius:18px;
      padding:14px 8px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.18);
      backdrop-filter:blur(10px);
    }
    .count-box strong{
      display:block;
      color:#fff;
      font-size:26px;
      font-weight:950;
      line-height:1.1;
    }
    .count-box span{
      display:block;
      margin-top:5px;
      color:rgba(255,255,255,.68);
      font-size:12px;
      font-weight:800;
    }
    .task-list{
      display:grid;
      gap:14px;
    }
    .task-item{
      padding:18px;
      border-radius:20px;
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
    }
    .task-line{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:10px;
    }
    .task-line strong{
      color:var(--color-ink);
      font-size:16px;
      font-weight:950;
    }
    .task-line span{
      color:var(--color-primary);
      background:var(--color-primary-soft);
      border-radius:999px;
      padding:5px 9px;
      font-size:12px;
      font-weight:900;
      white-space:nowrap;
    }
    .task-item p{
      margin:0 0 12px;
      color:var(--color-muted);
      font-size:14px;
    }
    .task-meter{
      height:8px;
      border-radius:999px;
      background:#edf2f7;
      overflow:hidden;
    }
    .task-meter span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--color-secondary),var(--color-primary));
    }

    .news-section{
      background:#fff;
      border-top:1px solid rgba(221,229,242,.65);
      border-bottom:1px solid rgba(221,229,242,.65);
    }
    .news-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 360px;
      gap:26px;
      align-items:start;
    }
    .news-list,.recommend-box{
      background:var(--color-surface);
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .news-list ul{
      margin:0;
      padding:0;
      list-style:none;
    }
    .news-list li+li{border-top:1px solid var(--color-border);}
    .news-link{
      display:grid;
      grid-template-columns:96px 1fr auto;
      gap:18px;
      align-items:center;
      padding:20px 22px;
    }
    .news-date{
      color:var(--color-primary);
      background:var(--color-primary-soft);
      border-radius:16px;
      padding:10px;
      text-align:center;
      font-weight:950;
      line-height:1.2;
      font-size:13px;
    }
    .news-link h3{
      margin:0 0 5px;
      color:var(--color-ink);
      font-size:18px;
      line-height:1.35;
      font-weight:950;
    }
    .news-link p{
      margin:0;
      color:var(--color-muted);
      font-size:14px;
    }
    .news-link i{color:var(--color-light);}
    .news-link:hover{background:var(--color-surface-2);}
    .news-link:hover i{color:var(--color-primary);transform:translateX(4px);}
    .recommend-box{padding:22px;}
    .recommend-box h3{
      margin:0 0 14px;
      color:var(--color-ink);
      font-size:20px;
      font-weight:950;
    }
    .rank-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
      counter-reset:rank;
    }
    .rank-list li{
      counter-increment:rank;
      display:grid;
      grid-template-columns:34px 1fr;
      gap:12px;
      align-items:start;
      padding:12px;
      border-radius:16px;
      background:var(--color-surface-2);
      border:1px solid var(--color-border);
    }
    .rank-list li:before{
      content:counter(rank);
      width:34px;
      height:34px;
      border-radius:12px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--color-ink);
      font-weight:950;
    }
    .rank-list strong{
      display:block;
      color:var(--color-ink);
      font-size:15px;
      line-height:1.3;
    }
    .rank-list span{
      display:block;
      margin-top:4px;
      color:var(--color-muted);
      font-size:13px;
    }

    .topic-wrap{
      display:grid;
      grid-template-columns:330px 1fr;
      gap:28px;
      align-items:start;
    }
    .topic-aside{
      position:sticky;
      top:146px;
      padding:26px;
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg,#fff,var(--color-primary-soft));
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
    }
    .topic-aside h3{
      margin:0 0 10px;
      color:var(--color-ink);
      font-size:24px;
      font-weight:950;
      letter-spacing:-.03em;
    }
    .topic-aside p{margin:0;color:var(--color-muted);}
    .topic-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      align-content:start;
    }
    .topic-tag{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:13px 16px;
      border-radius:999px;
      background:#fff;
      color:var(--color-text);
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
      font-weight:900;
      transition:.22s ease;
    }
    .topic-tag i{color:var(--color-primary);}
    .topic-tag:hover{color:var(--color-primary);}

    .hot-list{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .hot-card{
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      overflow:hidden;
      box-shadow:var(--shadow-sm);
      transition:.22s ease;
    }
    .hot-head{
      min-height:120px;
      padding:22px;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:16px;
      background:
        linear-gradient(135deg,var(--color-primary-soft),#fff),
        radial-gradient(circle at 90% 10%,rgba(255,138,31,.18),transparent 34%);
    }
    .hot-no{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:var(--color-ink);
      color:#fff;
      font-size:18px;
      font-weight:950;
      flex:0 0 auto;
    }
    .hot-head .badge{background:#fff;}
    .hot-body{padding:22px;}
    .hot-body h3{
      margin:0 0 8px;
      color:var(--color-ink);
      font-size:20px;
      font-weight:950;
    }
    .hot-body p{
      margin:0 0 18px;
      color:var(--color-muted);
      font-size:14px;
    }
    .hot-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(20,87,255,.26);}

    .case-strip{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .case-card{
      padding:24px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
      transition:.22s ease;
    }
    .case-card .quote{
      color:var(--color-primary);
      font-size:24px;
      margin-bottom:12px;
    }
    .case-card p{
      margin:0 0 18px;
      color:var(--color-text);
      font-weight:700;
    }
    .case-meta{
      display:flex;
      align-items:center;
      gap:12px;
    }
    .avatar{
      width:42px;
      height:42px;
      border-radius:50%;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--color-primary),var(--color-accent));
      font-weight:950;
      flex:0 0 auto;
    }
    .case-meta strong{
      display:block;
      color:var(--color-ink);
      font-size:14px;
      line-height:1.2;
    }
    .case-meta span{
      display:block;
      color:var(--color-muted);
      font-size:12px;
      margin-top:3px;
    }

    .price-section{
      background:
        linear-gradient(180deg,#fff,rgba(234,240,255,.60));
    }
    .price-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
      align-items:stretch;
    }
    .price-card{
      position:relative;
      padding:26px;
      border-radius:var(--radius-lg);
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
      transition:.22s ease;
    }
    .price-card.recommended{
      border-color:rgba(20,87,255,.36);
      box-shadow:var(--shadow-lg);
      transform:translateY(-8px);
    }
    .price-card.recommended:before{
      content:"推荐合作";
      position:absolute;
      top:18px;
      right:18px;
      color:#fff;
      background:var(--color-primary);
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:950;
    }
    .price-card h3{
      margin:0 0 8px;
      color:var(--color-ink);
      font-size:22px;
      font-weight:950;
    }
    .price{
      display:flex;
      align-items:flex-end;
      gap:6px;
      margin:18px 0;
      color:var(--color-ink);
    }
    .price strong{
      font-size:38px;
      line-height:1;
      font-weight:950;
      letter-spacing:-.06em;
    }
    .price span{color:var(--color-muted);font-size:13px;font-weight:800;margin-bottom:4px;}
    .price-card p{margin:0;color:var(--color-muted);font-size:14px;}
    .price-card ul{
      list-style:none;
      padding:0;
      margin:20px 0 24px;
      display:grid;
      gap:10px;
    }
    .price-card li{
      display:flex;
      gap:9px;
      align-items:flex-start;
      color:var(--color-text);
      font-size:14px;
      font-weight:700;
    }
    .price-card li i{color:var(--color-accent);margin-top:5px;}

    .faq-layout{
      display:grid;
      grid-template-columns:340px 1fr;
      gap:28px;
      align-items:start;
    }
    .faq-note{
      padding:26px;
      border-radius:var(--radius-lg);
      background:var(--color-ink);
      color:#fff;
      box-shadow:var(--shadow-md);
    }
    .faq-note h3{
      margin:0 0 10px;
      color:#fff;
      font-weight:950;
      font-size:24px;
    }
    .faq-note p{margin:0;color:rgba(255,255,255,.72);}
    .faq-list{
      display:grid;
      gap:14px;
    }
    .faq-item{
      border-radius:20px;
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-sm);
      overflow:hidden;
    }
    .faq-item summary{
      cursor:pointer;
      list-style:none;
      padding:20px 22px;
      color:var(--color-ink);
      font-size:17px;
      font-weight:950;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .faq-item summary::-webkit-details-marker{display:none;}
    .faq-item summary:after{
      content:"+";
      width:30px;
      height:30px;
      border-radius:50%;
      display:grid;
      place-items:center;
      color:var(--color-primary);
      background:var(--color-primary-soft);
      font-size:18px;
      flex:0 0 auto;
    }
    .faq-item[open] summary:after{content:"−";background:var(--color-primary);color:#fff;}
    .faq-item p{
      margin:0;
      padding:0 22px 22px;
      color:var(--color-muted);
      font-size:15px;
    }

    .cta-section{
      padding:76px 0;
    }
    .cta-card{
      display:grid;
      grid-template-columns:1fr 390px;
      gap:30px;
      align-items:center;
      padding:38px;
      border-radius:var(--radius-xl);
      background:
        radial-gradient(circle at 0% 0%,rgba(255,138,31,.22),transparent 34%),
        linear-gradient(135deg,#102044,#1457ff);
      color:#fff;
      box-shadow:var(--shadow-lg);
      overflow:hidden;
      position:relative;
    }
    .cta-card:after{
      content:"";
      position:absolute;
      inset:auto -80px -120px auto;
      width:320px;
      height:320px;
      border-radius:50%;
      background:rgba(255,255,255,.12);
      pointer-events:none;
    }
    .cta-content{position:relative;z-index:1;}
    .cta-content h2{
      margin:0;
      color:#fff;
      font-size:clamp(28px,3.5vw,48px);
      line-height:1.16;
      font-weight:950;
      letter-spacing:-.04em;
    }
    .cta-content p{
      margin:16px 0 0;
      color:rgba(255,255,255,.78);
      max-width:740px;
      font-size:16px;
    }
    .lead-form{
      position:relative;
      z-index:1;
      padding:22px;
      border-radius:24px;
      background:rgba(255,255,255,.96);
      border:1px solid rgba(255,255,255,.28);
      box-shadow:0 22px 54px rgba(0,0,0,.18);
    }
    .lead-form label{
      color:var(--color-ink);
      font-weight:900;
      margin-bottom:7px;
      font-size:13px;
    }
    .lead-form input,.lead-form select{
      height:46px;
      border-radius:14px;
      border:1px solid var(--color-border);
      background:#fff;
      box-shadow:none;
      color:var(--color-text);
      margin-bottom:12px;
      transition:.22s ease;
    }
    .lead-form input:focus,.lead-form select:focus{
      border-color:rgba(20,87,255,.55);
      box-shadow:0 0 0 4px rgba(20,87,255,.10);
      outline:none;
    }
    .form-tip{
      margin:12px 0 0;
      color:var(--color-muted);
      font-size:12px;
      line-height:1.6;
    }
    .form-message{
      display:none;
      margin-top:12px;
      padding:10px 12px;
      border-radius:14px;
      color:#087b64;
      background:var(--color-accent-soft);
      border:1px solid rgba(24,180,143,.18);
      font-size:13px;
      font-weight:800;
    }

    .site-footer{
      color:#cbd5e1;
      background:#0f172a;
      padding:56px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr .8fr;
      gap:34px;
      padding-bottom:34px;
      border-bottom:1px solid rgba(255,255,255,.10);
    }
    .footer-brand{
      display:flex;
      gap:12px;
      align-items:center;
      color:#fff;
      font-size:18px;
      font-weight:950;
      margin-bottom:14px;
    }
    .footer-brand .brand-mark{
      width:40px;
      height:40px;
      box-shadow:none;
    }
    .footer-text{
      max-width:520px;
      margin:0;
      color:#94a3b8;
      font-size:14px;
    }
    .footer-col h3{
      margin:0 0 14px;
      color:#fff;
      font-size:16px;
      font-weight:950;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:9px;
    }
    .footer-links a{
      color:#94a3b8;
      font-size:14px;
    }
    .footer-links a:hover{color:#fff;}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:20px;
      align-items:center;
      padding-top:22px;
      color:#94a3b8;
      font-size:13px;
    }
    .footer-badges{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .footer-badges span{
      border:1px solid rgba(255,255,255,.12);
      border-radius:999px;
      padding:5px 9px;
      color:#cbd5e1;
      background:rgba(255,255,255,.04);
    }

    .float-cta{
      position:fixed;
      right:18px;
      bottom:18px;
      z-index:45;
      display:flex;
      gap:10px;
      align-items:center;
      padding:10px;
      border-radius:999px;
      background:rgba(255,255,255,.92);
      border:1px solid var(--color-border);
      box-shadow:var(--shadow-md);
      backdrop-filter:blur(14px);
    }
    .float-cta span{
      color:var(--color-ink);
      font-size:13px;
      font-weight:900;
      padding-left:10px;
      white-space:nowrap;
    }
    .float-cta .btn{min-height:38px;padding:0 14px;font-size:13px;}

    @media (max-width:1024px){
      :root{--space-section:70px;}
      .brand-name{max-width:330px;}
      .quick-search{width:220px;}
      .hero-inner{grid-template-columns:1fr;padding:34px;}
      .hero-card{max-width:620px;}
      .play-grid,.progress-panel,.news-layout,.topic-wrap,.faq-layout,.cta-card{grid-template-columns:1fr;}
      .topic-aside{position:relative;top:auto;}
      .reward-layout{grid-template-columns:repeat(2,minmax(0,1fr));}
      .hot-list,.case-strip,.price-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
      .price-card.recommended{transform:none;}
    }
    @media (max-width:768px){
      .container{width:min(calc(100% - 28px), var(--container));}
      .brand-row{
        min-height:auto;
        padding:14px 0;
        align-items:flex-start;
        flex-direction:column;
      }
      .brand-name{max-width:calc(100vw - 94px);font-size:16px;}
      .header-actions{width:100%;display:grid;grid-template-columns:1fr auto;}
      .quick-search{width:100%;}
      .nav-cta{padding:0 14px;}
      .hero{padding:28px 0 52px;}
      .hero-inner{padding:24px;gap:24px;}
      .hero-board{min-height:auto;border-radius:26px;}
      .hero-copy p{font-size:16px;}
      .hero-metrics{grid-template-columns:1fr;}
      .hero-card-actions{grid-template-columns:1fr;}
      .section-head{
        align-items:flex-start;
        flex-direction:column;
        gap:14px;
      }
      .reward-layout,.hot-list,.case-strip,.price-grid{grid-template-columns:1fr;}
      .reward-card.featured{grid-column:auto;}
      .news-link{grid-template-columns:1fr;gap:10px;}
      .news-date{width:max-content;}
      .cta-card{padding:26px;border-radius:26px;}
      .footer-grid{grid-template-columns:1fr;}
      .footer-bottom{flex-direction:column;align-items:flex-start;}
      .float-cta{left:14px;right:14px;justify-content:space-between;}
    }
    @media (max-width:520px){
      :root{--space-section:58px;}
      .brand-mark{width:38px;height:38px;border-radius:13px;}
      .header-actions{grid-template-columns:1fr;}
      .nav-cta{width:100%;}
      .chip-scroll{padding:10px 0;}
      .nav-chip{font-size:13px;min-height:34px;padding:0 13px;}
      h1{font-size:34px;}
      .hero-label{font-size:12px;width:auto;}
      .hero-actions .btn{width:100%;}
      .hero-inner{padding:20px;}
      .hero-card{padding:18px;border-radius:22px;}
      .course-top{align-items:flex-start;}
      .course-status{white-space:normal;}
      .feature-panel,.deadline-card,.recommend-box,.topic-aside,.faq-note,.lead-form{padding:20px;}
      .countdown{grid-template-columns:repeat(2,1fr);}
      .task-line{align-items:flex-start;flex-direction:column;gap:8px;}
      .topic-cloud{gap:9px;}
      .topic-tag{font-size:13px;padding:11px 13px;}
      .float-cta span{display:none;}
      .float-cta .btn{width:100%;}
    }