:root{
    --blue:#1d4ed8;
    --blue-mid:#2563eb;
    --blue-soft:#eaf1ff;
    --ink:#0d1b34;
    --ink-2:#465madeup;
    --ink-2:#414f6b;
    --line:#d9e4f8;
    --radius:16px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;scroll-padding-top:84px;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.7;
    color:#0d1b34;
    background-color:#f4f8ff;
    background-image:linear-gradient(180deg,#eef4ff 0%,#f8fbff 42%,#eef4ff 100%);
    background-attachment:fixed;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;}
  a{color:#1d4ed8;text-decoration:none;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul{list-style:none;padding:0;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  .section{padding:64px 0;}
  .section-alt{
    background:linear-gradient(180deg,rgba(255,255,255,.78),rgba(234,241,255,.62));
    border-top:1px solid rgba(199,217,251,.65);
    border-bottom:1px solid rgba(199,217,251,.65);
  }
  .section-head{max-width:780px;margin:0 auto 40px;text-align:center;}
  .eyebrow{
    display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
    color:#1d4ed8;background:#eaf1ff;border:1px solid #d3e1fc;
    padding:5px 14px;border-radius:999px;margin-bottom:14px;
  }
  .section-title{font-size:30px;line-height:1.35;font-weight:800;color:#0d1b34;letter-spacing:-.01em;}
  .section-desc{margin-top:14px;font-size:15.5px;color:#4a5975;}

  /* 通用按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;font-family:inherit;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  }
  .btn-primary{background:linear-gradient(135deg,#2f6bf0,#1d4ed8);color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.28);}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(37,99,235,.36);}
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(37,99,235,.3);}
  .btn-ghost{background:#fff;color:#1d4ed8;border-color:#c7d9fb;}
  .btn-ghost:hover{background:#eaf1ff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(37,99,235,.14);}
  .btn-block{width:100%;}

  /* 头部导航 */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid #dde7f9;
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px;}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .ai-page-logo{max-height:38px;width:auto;display:block;}
  .brand-text{font-size:18px;font-weight:800;color:#0d1b34;letter-spacing:.02em;}
  .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;}
  .nav-links a{
    display:block;padding:8px 11px;font-size:14px;font-weight:500;color:#3a4863;
    border-radius:9px;transition:color .2s ease,background .2s ease;
  }
  .nav-links a:hover{color:#1d4ed8;background:#eaf1ff;}
  .nav-toggle{
    display:none;width:42px;height:42px;border:1px solid #d9e4f8;background:#fff;
    border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:5px;
    cursor:pointer;padding:0;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:#1d4ed8;border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
  .nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.active span:nth-child(2){opacity:0;}
  .nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* Hero */
  .hero{position:relative;padding:64px 0 68px;overflow:hidden;}
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:
      radial-gradient(620px 320px at 12% -6%,rgba(47,107,240,.20),transparent 68%),
      radial-gradient(560px 340px at 92% 6%,rgba(56,160,255,.16),transparent 70%);
  }
  .hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
    background-image:linear-gradient(rgba(29,78,216,.055) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(29,78,216,.055) 1px,transparent 1px);
    background-size:46px 46px;
    mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 72%);
    -webkit-mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 72%);
  }
  .hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
  .hero-badge{
    display:inline-block;font-size:13px;font-weight:600;color:#1d4ed8;
    background:#fff;border:1px solid #cfe0fd;border-radius:999px;padding:6px 14px;
    box-shadow:0 6px 18px rgba(37,99,235,.10);
  }
  .hero h1{font-size:44px;line-height:1.24;font-weight:800;letter-spacing:-.02em;margin:18px 0 0;color:#0b1830;}
  .hero-sub{margin-top:18px;font-size:16.5px;color:#475671;max-width:560px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;}
  .hero-points li{position:relative;padding-left:22px;font-size:14.5px;color:#3c4c68;}
  .hero-points li::before{
    content:"";position:absolute;left:0;top:7px;width:13px;height:13px;border-radius:50%;
    background:#eaf1ff;border:2px solid #2f6bf0;
  }
  .hero-copy{animation:fadeUp .7s ease both;}
  .hero-panel{
    background:#fff;border:1px solid #d5e3fb;border-radius:22px;overflow:hidden;
    box-shadow:0 26px 60px rgba(24,66,158,.16);
    animation:fadeUp .8s ease .12s both;
  }
  .panel-bar{display:flex;align-items:center;gap:7px;padding:14px 18px;background:linear-gradient(135deg,#eef4ff,#e3eeff);border-bottom:1px solid #dbe7fb;}
  .panel-dot{width:9px;height:9px;border-radius:50%;background:#b9cef5;}
  .panel-dot:nth-child(1){background:#2f6bf0;}
  .panel-title{margin-left:8px;font-size:13px;font-weight:600;color:#3b4a66;}
  .panel-body{padding:22px;}
  .panel-label{font-size:12.5px;font-weight:600;letter-spacing:.06em;color:#7b8aa6;margin-bottom:12px;}
  .model-chips{display:flex;flex-wrap:wrap;gap:8px;}
  .model-chips span{
    font-size:13px;font-weight:600;color:#1d4ed8;background:#eff5ff;border:1px solid #d9e6fd;
    padding:5px 11px;border-radius:8px;transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
  }
  .model-chips span:hover{transform:translateY(-2px);background:#e2ecff;box-shadow:0 8px 16px rgba(37,99,235,.14);}
  .panel-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px;}
  .panel-stats > div{background:#f7faff;border:1px solid #e3ecfb;border-radius:12px;padding:12px 14px;}
  .panel-stats strong{display:block;font-size:15px;font-weight:800;color:#0d1b34;}
  .panel-stats span{display:block;font-size:12.5px;color:#6c7b96;margin-top:2px;}
  @keyframes fadeUp{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:none;}}

  /* 指标 */
  .metrics{padding:0 0 8px;}
  .metrics-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;
    background:#fff;border:1px solid #d9e4f8;border-radius:20px;padding:22px;
    box-shadow:0 16px 40px rgba(24,66,158,.08);
  }
  .metric{padding:6px 16px;border-left:3px solid #2f6bf0;border-radius:2px;}
  .metric strong{display:block;font-size:28px;font-weight:800;color:#1246c9;line-height:1.25;letter-spacing:-.01em;}
  .metric strong span{font-size:15px;font-weight:700;margin-left:2px;color:#4a6ec4;}
  .metric p{font-size:13.5px;color:#5b6a86;margin-top:2px;}

  /* 关于我们 */
  .about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:32px;align-items:start;}
  .about-copy h3{font-size:20px;font-weight:800;color:#0d1b34;margin-bottom:12px;}
  .about-copy p{font-size:15.5px;color:#475671;margin-bottom:12px;}
  .about-copy .about-note{
    display:inline-block;margin-top:6px;font-size:14px;color:#1d4ed8;font-weight:600;
    background:#eff5ff;border:1px solid #d9e6fd;border-radius:10px;padding:8px 14px;
  }
  .about-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .about-card{
    background:#fff;border:1px solid #dbe6f9;border-radius:14px;padding:18px;
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .about-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(29,78,216,.12);border-color:#bfd4fb;}
  .about-card h4{font-size:15px;font-weight:700;color:#1246c9;margin-bottom:6px;}
  .about-card p{font-size:13.5px;color:#5b6a86;line-height:1.65;}

  /* 服务卡片 */
  .service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;}
  .service-card{
    background:#fff;border:1px solid #dbe6f9;border-radius:18px;padding:24px;
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .service-card:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(29,78,216,.14);border-color:#bfd4fb;}
  .svc-icon{
    display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
    border-radius:12px;background:linear-gradient(135deg,#eaf1ff,#dbe8ff);color:#1d4ed8;margin-bottom:14px;
  }
  .service-card h3{font-size:17px;font-weight:800;color:#0d1b34;margin-bottom:8px;}
  .service-card p{font-size:14.5px;color:#4a5975;}
  .svc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
  .svc-tags span{font-size:12.5px;color:#3c5c9e;background:#f2f7ff;border:1px solid #e0eafb;border-radius:6px;padding:3px 9px;}

  /* 模型标签云 */
  .model-cloud{margin-top:34px;background:#fff;border:1px solid #dbe6f9;border-radius:18px;padding:24px;}
  .model-cloud-title{font-size:14px;font-weight:700;color:#0d1b34;margin-bottom:14px;}
  .chips{display:flex;flex-wrap:wrap;gap:9px;}
  .chips span{
    font-size:13px;color:#3a4a66;background:#f5f9ff;border:1px solid #e2ebfa;border-radius:999px;
    padding:5px 13px;transition:all .2s ease;
  }
  .chips span:hover{color:#1d4ed8;background:#eaf1ff;border-color:#c9dcfb;transform:translateY(-2px);}

  /* 一站式制作 */
  .flow-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;}
  .flow-card{
    position:relative;background:#fff;border:1px solid #dbe6f9;border-radius:16px;padding:22px;
    transition:transform .25s ease,box-shadow .25s ease;
  }
  .flow-card:hover{transform:translateY(-4px);box-shadow:0 18px 38px rgba(29,78,216,.12);}
  .flow-step{display:inline-block;font-size:12.5px;font-weight:700;color:#1d4ed8;background:#eaf1ff;border-radius:6px;padding:2px 9px;margin-bottom:12px;}
  .flow-card h3{font-size:16px;font-weight:800;color:#0d1b34;margin-bottom:7px;}
  .flow-card p{font-size:14px;color:#4a5975;}

  /* 行业方案 */
  .industry-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;}
  .industry-item{
    display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid #dbe6f9;
    border-radius:14px;padding:18px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .industry-item:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(29,78,216,.1);border-color:#bfd4fb;}
  .industry-mark{
    flex:0 0 10px;width:10px;height:10px;border-radius:50%;margin-top:9px;
    background:linear-gradient(135deg,#2f6bf0,#63a4ff);
  }
  .industry-item h3{font-size:15.5px;font-weight:700;color:#0d1b34;margin-bottom:4px;}
  .industry-item p{font-size:13.5px;color:#5b6a86;}

  /* 服务网络 */
  .network-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
  .network-card{
    background:linear-gradient(180deg,#ffffff,#f8fbff);border:1px solid #dbe6f9;border-radius:16px;padding:20px;
    transition:transform .25s ease,box-shadow .25s ease;
  }
  .network-card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(29,78,216,.1);}
  .network-card h3{font-size:15.5px;font-weight:800;color:#1246c9;margin-bottom:6px;}
  .network-card p{font-size:13.5px;color:#4a5975;}
  .network-card strong{display:block;margin-top:8px;font-size:14px;color:#0d1b34;word-break:break-all;}

  /* 时间线 */
  .timeline{position:relative;max-width:920px;margin:0 auto;padding-left:26px;}
  .timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,#2f6bf0,#b9d2fb);}
  .tl-item{position:relative;padding:0 0 26px 22px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-item::before{
    content:"";position:absolute;left:-4px;top:7px;width:12px;height:12px;border-radius:50%;
    background:#fff;border:3px solid #2f6bf0;
  }
  .tl-item h3{font-size:16px;font-weight:800;color:#0d1b34;margin-bottom:5px;}
  .tl-item p{font-size:14px;color:#4a5975;}

  /* 案例 */
  .case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;}
  .case-card{
    background:#fff;border:1px solid #dbe6f9;border-radius:18px;overflow:hidden;
    transition:transform .25s ease,box-shadow .25s ease;
  }
  .case-card:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(29,78,216,.14);}
  .case-media{aspect-ratio:4 / 3;background:#eef4ff;display:flex;align-items:center;justify-content:center;padding:10px;}
  .case-media img{width:100%;height:100%;object-fit:contain;}
  .case-body{padding:18px 20px 22px;}
  .case-body h3{font-size:16px;font-weight:800;color:#0d1b34;margin-bottom:6px;}
  .case-body p{font-size:14px;color:#4a5975;}
  .banner-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:24px;}
  .banner-item{aspect-ratio:16 / 9;background:#eef4ff;border:1px solid #dbe6f9;border-radius:12px;padding:8px;display:flex;align-items:center;justify-content:center;}
  .banner-item img{width:100%;height:100%;object-fit:contain;}

  /* 对比评测 */
  .score-card{
    display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:center;
    background:linear-gradient(135deg,#1246c9,#2f6bf0);border-radius:20px;padding:30px;color:#fff;
    box-shadow:0 22px 50px rgba(24,66,158,.28);margin-bottom:26px;
  }
  .score-num{font-size:52px;font-weight:800;line-height:1;letter-spacing:-.02em;}
  .score-num span{font-size:18px;font-weight:600;opacity:.85;margin-left:4px;}
  .score-stars{font-size:20px;letter-spacing:4px;color:#ffd76b;margin-top:10px;}
  .score-card p{font-size:14px;color:#e6eeff;margin-top:8px;}
  .score-right p{font-size:15px;line-height:1.8;color:#eef4ff;}
  .table-wrap{overflow-x:auto;background:#fff;border:1px solid #dbe6f9;border-radius:16px;box-shadow:0 14px 34px rgba(24,66,158,.07);}
  table{width:100%;border-collapse:collapse;min-width:720px;}
  thead th{
    background:#f1f6ff;color:#1246c9;font-size:14px;font-weight:700;text-align:left;
    padding:14px 18px;border-bottom:1px solid #dbe6f9;white-space:nowrap;
  }
  tbody td{padding:13px 18px;font-size:14px;color:#3c4c68;border-bottom:1px solid #eef3fc;vertical-align:top;}
  tbody tr:last-child td{border-bottom:none;}
  tbody tr:hover td{background:#f8fbff;}
  tbody td:first-child{font-weight:600;color:#0d1b34;white-space:nowrap;}
  .td-best{color:#1246c9;font-weight:600;}

  /* 用户评论 */
  .review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;}
  .review-card{
    background:#fff;border:1px solid #dbe6f9;border-radius:18px;padding:22px;
    display:flex;flex-direction:column;gap:14px;
    transition:transform .25s ease,box-shadow .25s ease;
  }
  .review-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(29,78,216,.12);}
  .review-text{font-size:14.5px;color:#3f4f6b;line-height:1.75;}
  .review-user{display:flex;align-items:center;gap:12px;margin-top:auto;}
  .avatar{
    width:40px;height:40px;border-radius:50%;flex:0 0 40px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#2f6bf0,#63a4ff);color:#fff;font-size:15px;font-weight:700;
  }
  .review-user strong{display:block;font-size:14.5px;color:#0d1b34;}
  .review-user span{display:block;font-size:12.5px;color:#71809a;}

  /* Token 比价 */
  .token-note{font-size:13.5px;color:#6c7b96;margin-top:14px;text-align:center;}

  /* 需求匹配 / 表单 */
  .match-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:start;}
  .match-list{display:grid;gap:12px;margin-top:18px;}
  .match-list li{
    display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid #dbe6f9;
    border-radius:12px;padding:14px 16px;
  }
  .match-list b{flex:0 0 auto;font-size:12.5px;font-weight:700;color:#1d4ed8;background:#eaf1ff;border-radius:6px;padding:2px 9px;margin-top:3px;}
  .match-list span{font-size:14px;color:#4a5975;}
  .req-form{background:#fff;border:1px solid #dbe6f9;border-radius:20px;padding:26px;box-shadow:0 18px 42px rgba(24,66,158,.09);}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .req-form label{display:block;font-size:13.5px;font-weight:600;color:#37455e;margin-bottom:14px;}
  .req-form input,.req-form select,.req-form textarea{
    width:100%;margin-top:7px;padding:11px 13px;font-size:14px;font-family:inherit;color:#0d1b34;
    background:#fafcff;border:1px solid #d9e4f8;border-radius:10px;outline:none;
    transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  }
  .req-form textarea{resize:vertical;min-height:96px;}
  .req-form input:focus,.req-form select:focus,.req-form textarea:focus{
    border-color:#2f6bf0;background:#fff;box-shadow:0 0 0 3px rgba(47,107,240,.14);
  }
  .req-form input::placeholder,.req-form textarea::placeholder{color:#9aa8c0;}
  .form-tip{font-size:12.5px;color:#71809a;margin-top:12px;text-align:center;}

  /* FAQ */
  .faq-list{max-width:920px;margin:0 auto;display:grid;gap:12px;}
  .faq-item{background:#fff;border:1px solid #dbe6f9;border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
  .faq-item.open{border-color:#bfd4fb;box-shadow:0 14px 32px rgba(29,78,216,.1);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:17px 20px;background:transparent;border:none;cursor:pointer;text-align:left;
    font-size:15px;font-weight:600;color:#0d1b34;font-family:inherit;line-height:1.5;
  }
  .faq-q:hover{color:#1d4ed8;}
  .faq-icon{position:relative;flex:0 0 16px;width:16px;height:16px;}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:#1d4ed8;border-radius:2px;
    transform:translate(-50%,-50%);transition:transform .25s ease,opacity .25s ease;
  }
  .faq-icon::before{width:14px;height:2px;}
  .faq-icon::after{width:2px;height:14px;}
  .faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
  .faq-a p{padding:0 20px 18px;font-size:14.5px;color:#4a5975;}

  /* 百科 / 资讯 */
  .wiki-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
  .wiki-card{background:#fff;border:1px solid #dbe6f9;border-radius:14px;padding:18px;transition:transform .25s ease,box-shadow .25s ease;}
  .wiki-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(29,78,216,.1);}
  .wiki-card h3{font-size:15px;font-weight:800;color:#1246c9;margin-bottom:6px;}
  .wiki-card p{font-size:13.5px;color:#4a5975;}
  .news-list{display:grid;gap:10px;margin-top:22px;}
  .news-item{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    background:#fff;border:1px solid #dbe6f9;border-radius:12px;padding:15px 18px;
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .news-item:hover{transform:translateX(4px);box-shadow:0 12px 26px rgba(29,78,216,.09);border-color:#bfd4fb;}
  .news-item span{font-size:14.5px;color:#35435e;font-weight:500;}
  .news-item em{font-size:12.5px;font-style:normal;color:#1d4ed8;background:#eaf1ff;border-radius:6px;padding:3px 10px;white-space:nowrap;flex:0 0 auto;}

  /* 加盟代理 */
  .join-box{
    background:linear-gradient(135deg,#eef4ff,#e0ecff);border:1px solid #c9dcfb;border-radius:22px;
    padding:34px;display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center;
  }
  .join-box h2{font-size:26px;font-weight:800;color:#0d1b34;line-height:1.35;}
  .join-box p{font-size:15px;color:#43536f;margin-top:12px;}
  .join-points{display:grid;gap:10px;margin:18px 0 22px;}
  .join-points li{position:relative;padding-left:20px;font-size:14.5px;color:#3c4c68;}
  .join-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:#2f6bf0;transform:rotate(45deg);}
  .join-aside{background:#fff;border:1px solid #d5e3fb;border-radius:16px;padding:22px;text-align:center;}
  .join-aside strong{display:block;font-size:34px;font-weight:800;color:#1246c9;line-height:1.1;}
  .join-aside span{display:block;font-size:13.5px;color:#5b6a86;margin-top:6px;}

  /* 联系我们 */
  .contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;align-items:start;}
  .contact-card{background:#fff;border:1px solid #dbe6f9;border-radius:18px;padding:24px;transition:transform .25s ease,box-shadow .25s ease;}
  .contact-card:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(29,78,216,.1);}
  .contact-card h3{font-size:16px;font-weight:800;color:#0d1b34;margin-bottom:10px;}
  .contact-card ul{display:grid;gap:6px;}
  .contact-card li{font-size:14.5px;color:#43536f;word-break:break-all;}
  .qr-box{text-align:center;}
  .qr-box img{width:150px;height:auto;margin:0 auto 10px;border-radius:10px;border:1px solid #e2ebfa;background:#fff;padding:6px;}
  .qr-box p{font-size:13.5px;color:#5b6a86;}

  /* 页脚 */
  .site-footer{background:#0b1b38;color:#c5d3ea;padding:44px 0 0;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-bottom:28px;}
  .site-footer .ai-page-logo{max-height:34px;margin-bottom:14px;background:#fff;border-radius:8px;padding:4px 8px;}
  .footer-brand p{font-size:13.5px;color:#9db0cd;margin-bottom:8px;}
  .footer-cta{
    display:inline-block;margin-top:8px;font-size:13.5px;font-weight:600;color:#fff;
    background:linear-gradient(135deg,#2f6bf0,#1d4ed8);padding:9px 20px;border-radius:999px;
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .footer-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(47,107,240,.4);}
  .footer-title{font-size:14px;font-weight:700;color:#ffffff;margin-bottom:14px;}
  .footer-col ul{display:grid;gap:8px;}
  .footer-col li,.footer-col li a{font-size:13.5px;color:#a9bbd6;word-break:break-all;}
  .footer-col a:hover{color:#ffffff;text-decoration:underline;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
    padding-top:16px;padding-bottom:20px;
  }
  .footer-bottom p{font-size:13px;color:#96a9c6;}
  .footer-bottom a{font-size:13px;color:#a9bbd6;}
  .footer-bottom a:hover{color:#ffffff;}

  /* 浮动客服 & 返回顶部 */
  .float-tools{position:fixed;right:18px;bottom:20px;z-index:70;display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
  .float-btn{
    width:50px;height:50px;border-radius:50%;border:1px solid #c9dcfb;cursor:pointer;
    background:linear-gradient(135deg,#2f6bf0,#1d4ed8);color:#fff;font-size:13px;font-weight:700;
    display:flex;align-items:center;justify-content:center;box-shadow:0 12px 26px rgba(29,78,216,.3);
    transition:transform .2s ease,box-shadow .2s ease;font-family:inherit;
  }
  .float-btn:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(29,78,216,.4);}
  .float-btn svg{display:block;}
  .back-top{background:#fff;color:#1d4ed8;opacity:0;pointer-events:none;transition:opacity .25s ease,transform .2s ease;}
  .back-top.show{opacity:1;pointer-events:auto;}
  .kf-panel{
    position:fixed;right:18px;bottom:84px;z-index:71;width:238px;background:#fff;
    border:1px solid #d5e3fb;border-radius:16px;padding:16px;text-align:center;
    box-shadow:0 24px 50px rgba(15,40,100,.2);display:none;
  }
  .kf-panel.show{display:block;animation:fadeUp .25s ease both;}
  .kf-panel img{width:140px;height:auto;margin:0 auto 10px;border-radius:10px;border:1px solid #e2ebfa;padding:5px;background:#fff;}
  .kf-panel strong{display:block;font-size:14px;color:#0d1b34;margin-bottom:4px;}
  .kf-panel p{font-size:12.5px;color:#5b6a86;line-height:1.6;}

  /* 滚动渐入 */
  html.js-on .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
  html.js-on .reveal.is-visible{opacity:1;transform:none;}

  @media (max-width:1024px){
    .hero-grid{grid-template-columns:1fr;gap:34px;}
    .hero h1{font-size:36px;}
    .about-grid{grid-template-columns:1fr;}
    .match-grid{grid-template-columns:1fr;}
    .score-card{grid-template-columns:1fr;gap:16px;}
    .join-box{grid-template-columns:1fr;padding:26px;}
    .footer-grid{grid-template-columns:1fr 1fr;}
    .nav-toggle{display:flex;}
    .nav-links{
      display:none;position:absolute;left:0;right:0;top:100%;
      background:#fff;border-bottom:1px solid #dde7f9;flex-direction:column;align-items:stretch;
      padding:8px 16px 16px;box-shadow:0 18px 34px rgba(15,40,100,.12);gap:0;
    }
    .nav-links.open{display:flex;}
    .nav-links a{padding:12px 12px;font-size:15px;}
  }
  @media (max-width:720px){
    .section{padding:48px 0;}
    .section-title{font-size:24px;}
    .hero{padding:44px 0 52px;}
    .hero h1{font-size:29px;}
    .hero-sub{font-size:15px;}
    .hero-actions{gap:12px;}
    .btn{padding:12px 22px;font-size:14.5px;}
    .metrics-grid{padding:16px;gap:12px;}
    .metric{padding:4px 12px;}
    .metric strong{font-size:23px;}
    .about-cards{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:24px;}
    .score-num{font-size:42px;}
    .join-aside{text-align:left;}
    .req-form{padding:20px;}
    .model-cloud{padding:18px;}
    .news-item{flex-direction:column;align-items:flex-start;gap:6px;}
  }