:root{
    --ink:#0f1b2d;
    --ink-soft:#33445c;
    --muted:#61718a;
    --line:#e2e8f2;
    --bg:#f5f8ff;
    --card:#ffffff;
    --primary:#2563ff;
    --primary-deep:#1741c9;
    --accent:#00d3a7;
    --accent-soft:#e6fff8;
    --warm:#ff8a3d;
    --radius:18px;
    --shadow-sm:0 4px 14px rgba(23,53,120,.06);
    --shadow-md:0 14px 34px rgba(23,53,120,.10);
    --shadow-lg:0 26px 60px rgba(23,53,120,.16);
    --maxw:1200px;
    --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    font-family:var(--font);
    color:var(--ink);
    background:
      radial-gradient(1200px 500px at 12% -8%, rgba(37,99,255,.10), transparent 60%),
      radial-gradient(1000px 480px at 92% 2%, rgba(0,211,167,.12), transparent 58%),
      linear-gradient(180deg,#f5f8ff 0%,#eef4ff 40%,#f7faff 100%);
    line-height:1.65;
    font-size:16px;
    overflow-x:hidden;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;height:auto;}
  ul{list-style:none;}
  button{font-family:inherit;cursor:pointer;}
  h1,h2,h3,h4{line-height:1.25;color:var(--ink);font-weight:800;letter-spacing:-.01em;}
  section{position:relative;}
  .container{
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding-left:24px;
    padding-right:24px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:700;letter-spacing:.14em;
    color:var(--primary-deep);
    background:rgba(37,99,255,.08);
    border:1px solid rgba(37,99,255,.16);
    padding:6px 14px;border-radius:999px;
    text-transform:uppercase;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(0,211,167,.18);}
  .section-head{max-width:760px;margin-bottom:38px;}
  .section-head h2{font-size:clamp(24px,3.4vw,38px);margin:16px 0 12px;}
  .section-head p{color:var(--muted);font-size:16px;}
  .section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
  .section-pad{padding:84px 0;}
  .section-pad.tight{padding:64px 0;}

  /* ===== 导航 ===== */
  .site-header{
    position:sticky;top:0;z-index:120;
    background:rgba(255,255,255,.86);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(37,99,255,.10);
    transition:box-shadow .3s ease;
  }
  .site-header.scrolled{box-shadow:0 8px 26px rgba(23,53,120,.10);}
  .nav-wrap{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    min-height:74px;
  }
  .brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
  .brand .ai-page-logo{width:auto;max-height:40px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-text strong{font-size:17px;font-weight:800;color:var(--ink);}
  .brand-text span{font-size:11px;letter-spacing:.16em;color:var(--primary);font-weight:700;}
  .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;}
  .nav-links a{
    font-size:14.5px;font-weight:600;color:var(--ink-soft);
    padding:9px 12px;border-radius:10px;
    transition:color .2s,background .2s;
    white-space:nowrap;
  }
  .nav-links a:hover{color:var(--primary-deep);background:rgba(37,99,255,.07);}
  .nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-weight:700;font-size:15px;border:none;border-radius:12px;
    padding:12px 22px;transition:transform .2s,box-shadow .25s,background .25s;
    white-space:nowrap;
  }
  .btn-primary{
    color:#fff;
    background:linear-gradient(135deg,#2563ff 0%,#4a86ff 55%,#00c8a3 130%);
    box-shadow:0 10px 24px rgba(37,99,255,.28);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(37,99,255,.36);}
  .btn-primary:active{transform:translateY(0) scale(.99);}
  .btn-ghost{
    color:var(--primary-deep);background:#fff;
    border:1.5px solid rgba(37,99,255,.28);
    box-shadow:var(--shadow-sm);
  }
  .btn-ghost:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--shadow-md);}
  .btn-sm{padding:9px 16px;font-size:14px;border-radius:10px;}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    background:#fff;border:1.5px solid var(--line);
    align-items:center;justify-content:center;flex-direction:column;gap:5px;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.3s;}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.open span:nth-child(2){opacity:0;}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ===== Hero ===== */
  .hero{
    padding:70px 0 80px;
    overflow:hidden;
  }
  .hero::before{
    content:"";position:absolute;inset:0;z-index:-1;
    background:
      radial-gradient(700px 380px at 85% 0%, rgba(0,211,167,.16), transparent 60%),
      radial-gradient(680px 400px at 0% 30%, rgba(37,99,255,.14), transparent 62%);
    pointer-events:none;
  }
  .hero-grid{
    display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;
  }
  .hero h1{
    font-size:clamp(30px,4.4vw,52px);
    margin:20px 0 18px;
    letter-spacing:-.02em;
  }
  .hero h1 em{
    font-style:normal;
    background:linear-gradient(120deg,#2563ff,#00b894);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-lead{color:var(--ink-soft);font-size:clamp(15px,1.6vw,17.5px);max-width:600px;margin-bottom:26px;}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
  .hero-tags{display:flex;flex-wrap:wrap;gap:9px;}
  .tag{
    font-size:13px;font-weight:600;color:var(--primary-deep);
    background:rgba(37,99,255,.08);border:1px solid rgba(37,99,255,.16);
    padding:6px 13px;border-radius:999px;
    transition:transform .2s,background .2s;
  }
  .tag:hover{transform:translateY(-2px);background:rgba(37,99,255,.14);}
  .hero-visual{
    display:grid;grid-template-columns:1fr 1fr;gap:14px;
  }
  .metric{
    background:linear-gradient(160deg,#ffffff 0%,#f4f8ff 100%);
    border:1px solid var(--line);border-radius:var(--radius);
    padding:20px 18px;box-shadow:var(--shadow-sm);
    transition:transform .3s,box-shadow .3s;
  }
  .metric:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
  .metric .m-val{font-size:26px;font-weight:800;color:var(--primary-deep);letter-spacing:-.02em;}
  .metric .m-val small{font-size:14px;color:var(--muted);font-weight:600;margin-left:2px;}
  .metric .m-label{font-size:13px;color:var(--muted);margin-top:4px;font-weight:600;}
  .metric.wide{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:14px;
    background:linear-gradient(120deg,#0f1b2d 0%,#173a7a 60%,#0b7a63 120%);color:#fff;border:none;}
  .metric.wide .m-val{color:#fff;font-size:22px;}
  .metric.wide .m-val small{color:rgba(255,255,255,.72);}
  .metric.wide span.badge{font-size:12px;font-weight:700;background:rgba(255,255,255,.16);color:#eafff9;padding:5px 11px;border-radius:999px;white-space:nowrap;}

  /* ===== 通用卡片 ===== */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s,border-color .3s;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(37,99,255,.22);}

  /* 平台介绍 */
  .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start;}
  .intro-copy p{color:var(--ink-soft);margin-bottom:14px;}
  .intro-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px;}
  .intro-item{
    display:flex;gap:12px;align-items:flex-start;
    padding:14px;border-radius:14px;background:#fff;border:1px solid var(--line);
    transition:transform .25s,box-shadow .25s;
  }
  .intro-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);}
  .dot-ic{
    flex-shrink:0;width:30px;height:30px;border-radius:9px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(37,99,255,.14),rgba(0,211,167,.18));
    color:var(--primary-deep);font-weight:800;font-size:13px;
  }
  .intro-item strong{display:block;font-size:14.5px;margin-bottom:2px;}
  .intro-item span{font-size:13px;color:var(--muted);}
  .intro-panel{
    background:linear-gradient(160deg,#0f1b2d 0%,#16346f 70%,#0b6a58 130%);
    color:#fff;border-radius:22px;padding:30px;box-shadow:var(--shadow-lg);
  }
  .intro-panel h3{color:#fff;font-size:20px;margin-bottom:8px;}
  .intro-panel p{color:rgba(255,255,255,.76);font-size:14px;margin-bottom:20px;}
  .model-cloud{display:flex;flex-wrap:wrap;gap:8px;}
  .model-cloud span{
    font-size:12.5px;font-weight:600;color:#e9f1ff;
    background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);
    padding:5px 11px;border-radius:999px;transition:background .2s,transform .2s;
  }
  .model-cloud span:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);}
  .intro-panel .mini-cta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;}
  .btn-light{background:#fff;color:var(--ink);box-shadow:0 8px 20px rgba(0,0,0,.18);}
  .btn-light:hover{transform:translateY(-2px);}
  .btn-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45);}
  .btn-outline-light:hover{background:rgba(255,255,255,.12);transform:translateY(-2px);}

  /* 服务能力 */
  .svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
  .svc-card{padding:26px 24px;display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden;}
  .svc-card::after{
    content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;
    background:radial-gradient(circle,rgba(37,99,255,.10),transparent 70%);
    transition:transform .35s;
  }
  .svc-card:hover::after{transform:scale(1.5);}
  .svc-ic{
    width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
    font-size:20px;font-weight:800;color:#fff;
    background:linear-gradient(135deg,#2563ff,#00c8a3);
    box-shadow:0 8px 18px rgba(37,99,255,.26);
  }
  .svc-card h3{font-size:18px;}
  .svc-card p{font-size:14px;color:var(--muted);flex-grow:1;}
  .svc-link{font-size:13.5px;font-weight:700;color:var(--primary-deep);display:inline-flex;align-items:center;gap:6px;}
  .svc-link::after{content:"→";transition:transform .2s;}
  .svc-card:hover .svc-link::after{transform:translateX(4px);}

  /* 场景标签 */
  .scene-wrap{
    background:linear-gradient(160deg,#ffffff 0%,#f2f7ff 100%);
    border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow-sm);
  }
  .scene-tags{display:flex;flex-wrap:wrap;gap:10px;}
  .scene-tags span{
    font-size:13.5px;font-weight:600;color:var(--ink-soft);
    background:#fff;border:1px solid var(--line);
    padding:8px 15px;border-radius:11px;
    transition:transform .22s,box-shadow .22s,color .22s,border-color .22s;
  }
  .scene-tags span:hover{transform:translateY(-3px);color:var(--primary-deep);border-color:rgba(37,99,255,.3);box-shadow:var(--shadow-sm);}

  /* 流程 */
  .flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
  .flow-step{padding:24px 22px;position:relative;}
  .flow-step .num{
    font-size:13px;font-weight:800;color:var(--primary);
    letter-spacing:.1em;margin-bottom:10px;
  }
  .flow-step h3{font-size:17px;margin-bottom:8px;}
  .flow-step p{font-size:13.5px;color:var(--muted);}
  .flow-step::before{
    content:"";position:absolute;left:0;top:0;width:0;height:3px;border-radius:3px;
    background:linear-gradient(90deg,#2563ff,#00c8a3);transition:width .4s;
  }
  .flow-step:hover::before{width:100%;}

  /* 对比表 */
  .table-wrap{
    overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);
    background:#fff;box-shadow:var(--shadow-sm);
  }
  table.compare{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px;}
  table.compare th,table.compare td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);}
  table.compare thead th{
    background:linear-gradient(120deg,#0f1b2d,#173a7a);color:#fff;font-size:14px;font-weight:700;
  }
  table.compare thead th:nth-child(2){background:linear-gradient(120deg,#2563ff,#00b894);}
  table.compare tbody tr:hover{background:rgba(37,99,255,.04);}
  table.compare td:first-child{font-weight:700;color:var(--ink);}
  table.compare td:nth-child(2){color:var(--primary-deep);font-weight:700;}
  .rating-box{
    display:flex;flex-wrap:wrap;align-items:center;gap:26px;
    background:linear-gradient(120deg,#0f1b2d,#16346f);
    color:#fff;border-radius:22px;padding:28px 30px;margin-bottom:26px;
    box-shadow:var(--shadow-lg);
  }
  .rating-score{font-size:44px;font-weight:800;line-height:1;letter-spacing:-.03em;}
  .rating-score small{font-size:16px;color:rgba(255,255,255,.66);font-weight:600;}
  .rating-info h3{color:#fff;font-size:19px;margin-bottom:4px;}
  .rating-info p{color:rgba(255,255,255,.74);font-size:14px;}
  .stars{font-size:22px;color:#ffd76a;letter-spacing:3px;}

  /* 案例 */
  .case-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px;}
  .case-card{overflow:hidden;display:flex;flex-direction:column;}
  .case-media{aspect-ratio:16/10;overflow:hidden;background:#eef3ff;}
  .case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
  .case-card:hover .case-media img{transform:scale(1.05);}
  .case-body{padding:18px 20px;display:flex;flex-direction:column;gap:6px;}
  .case-body h3{font-size:16px;}
  .case-body p{font-size:13.5px;color:var(--muted);}
  .case-card.square .case-media{aspect-ratio:1/1;}
  .case-card.tall{grid-row:span 2;}
  .case-card.tall .case-media{aspect-ratio:16/13;}

  /* 评价 */
  .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
  .review-card{padding:24px;display:flex;flex-direction:column;gap:14px;}
  .review-top{display:flex;align-items:center;gap:12px;}
  .avatar{
    width:44px;height:44px;border-radius:50%;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:16px;
    background:linear-gradient(135deg,#2563ff,#00c8a3);
  }
  .review-top strong{display:block;font-size:15px;}
  .review-top span{font-size:12.5px;color:var(--muted);}
  .review-card p{font-size:14px;color:var(--ink-soft);flex-grow:1;}
  .review-stars{color:#ffb020;font-size:14px;letter-spacing:2px;}

  /* Token */
  .token-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
  .token-card{padding:24px;display:flex;flex-direction:column;gap:10px;}
  .token-card h3{font-size:16.5px;}
  .token-card .price{font-size:30px;font-weight:800;color:var(--primary-deep);letter-spacing:-.02em;}
  .token-card .price small{font-size:13px;color:var(--muted);font-weight:600;}
  .token-card ul{display:flex;flex-direction:column;gap:7px;margin:6px 0 4px;}
  .token-card li{font-size:13.5px;color:var(--muted);padding-left:18px;position:relative;}
  .token-card li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800;}
  .token-note{font-size:12.5px;color:var(--muted);margin-top:10px;}

  /* FAQ */
  .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start;}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .25s,box-shadow .25s;}
  .faq-item.open{border-color:rgba(37,99,255,.3);box-shadow:var(--shadow-md);}
  .faq-q{
    width:100%;text-align:left;background:none;border:none;
    padding:17px 18px;font-size:14.5px;font-weight:700;color:var(--ink);
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  .faq-q .plus{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:rgba(37,99,255,.1);color:var(--primary-deep);
    display:flex;align-items:center;justify-content:center;font-size:14px;transition:transform .3s,background .3s;}
  .faq-item.open .faq-q .plus{transform:rotate(45deg);background:var(--primary);color:#fff;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
  .faq-a p{padding:0 18px 17px;font-size:13.5px;color:var(--muted);}

  /* 文章 */
  .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
  .article-card{padding:22px;display:flex;flex-direction:column;gap:10px;}
  .article-card .date{font-size:12.5px;color:var(--primary);font-weight:700;letter-spacing:.05em;}
  .article-card h3{font-size:16px;}
  .article-card p{font-size:13.5px;color:var(--muted);flex-grow:1;}
  .article-card a.more{font-size:13px;font-weight:700;color:var(--primary-deep);}

  /* 服务网络 */
  .net-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
  .net-item{padding:20px;display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);}
  .net-item strong{font-size:15px;}
  .net-item span{font-size:13px;color:var(--muted);}

  /* 表单 */
  .contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:36px;align-items:start;}
  .contact-info{display:flex;flex-direction:column;gap:14px;}
  .contact-line{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow-sm);}
  .contact-line .ci{flex-shrink:0;width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(37,99,255,.12),rgba(0,211,167,.16));color:var(--primary-deep);font-weight:800;font-size:15px;}
  .contact-line strong{display:block;font-size:14px;margin-bottom:2px;}
  .contact-line span,.contact-line a{font-size:13.5px;color:var(--muted);word-break:break-all;}
  .contact-line a:hover{color:var(--primary-deep);}
  .qr-box{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow-sm);}
  .qr-box img{width:96px;height:96px;object-fit:contain;border-radius:8px;border:1px solid var(--line);}
  .qr-box strong{display:block;font-size:14px;margin-bottom:4px;}
  .qr-box span{font-size:13px;color:var(--muted);}

  .form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow-md);}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
  .field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px;}
  .field label{font-size:13.5px;font-weight:700;color:var(--ink-soft);}
  .field input,.field select,.field textarea{
    width:100%;font-family:inherit;font-size:14.5px;color:var(--ink);
    background:#f8faff;border:1.5px solid var(--line);border-radius:11px;
    padding:12px 14px;transition:border-color .2s,box-shadow .2s,background .2s;
  }
  .field input::placeholder,.field textarea::placeholder{color:#9aa8bd;}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(37,99,255,.1);
  }
  .field textarea{resize:vertical;min-height:110px;}
  .form-tip{font-size:12.5px;color:var(--muted);margin-top:10px;}

  /* 加盟 */
  .join-banner{
    background:linear-gradient(120deg,#0f1b2d 0%,#1a3f86 60%,#0a7a63 130%);
    border-radius:24px;padding:44px 38px;color:#fff;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
    box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
  }
  .join-banner::after{
    content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border-radius:50%;
    background:radial-gradient(circle,rgba(0,211,167,.35),transparent 70%);
  }
  .join-banner h2{color:#fff;font-size:clamp(22px,3vw,30px);margin-bottom:10px;position:relative;z-index:1;}
  .join-banner p{color:rgba(255,255,255,.78);max-width:600px;font-size:15px;position:relative;z-index:1;}
  .join-banner .join-cta{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}

  /* 页脚 */
  .site-footer{
    background:#0b1526;color:#c6d2e6;padding:56px 0 24px;margin-top:0;
  }
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;}
  .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
  .footer-brand img{max-height:36px;width:auto;}
  .footer-brand strong{color:#fff;font-size:17px;}
  .footer-desc{font-size:13.5px;color:#9fb0c9;line-height:1.75;max-width:320px;}
  .footer-col h4{color:#fff;font-size:14.5px;margin-bottom:14px;font-weight:700;}
  .footer-col ul{display:flex;flex-direction:column;gap:9px;}
  .footer-col a,.footer-col span{font-size:13.5px;color:#9fb0c9;transition:color .2s;}
  .footer-col a:hover{color:#7fd7c2;}
  .footer-links-wrap{display:flex;flex-wrap:wrap;gap:8px 16px;}
  .footer-links-wrap a{font-size:13px;color:#9fb0c9;}
  .footer-links-wrap a:hover{color:#7fd7c2;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);margin-top:38px;padding-top:20px;
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
    font-size:12.5px;color:#7d8da6;
  }

  /* 浮动 */
  .back-top{
    position:fixed;right:20px;bottom:96px;z-index:110;width:46px;height:46px;border-radius:14px;
    background:#fff;border:1.5px solid var(--line);color:var(--primary-deep);
    display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;
    box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .3s,visibility .3s,transform .3s;
  }
  .back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
  .back-top:hover{background:var(--primary);color:#fff;border-color:var(--primary);}
  .float-kf{
    position:fixed;right:20px;bottom:24px;z-index:110;
    display:inline-flex;align-items:center;gap:9px;
    background:linear-gradient(135deg,#2563ff,#00c8a3);color:#fff;
    padding:13px 18px;border-radius:999px;font-size:14px;font-weight:700;
    box-shadow:0 14px 32px rgba(37,99,255,.36);
    transition:transform .25s,box-shadow .25s;
  }
  .float-kf:hover{transform:translateY(-3px);box-shadow:0 20px 40px rgba(37,99,255,.44);}

  /* 动画 */
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.6,.3,1),transform .7s cubic-bezier(.2,.6,.3,1);}
  .reveal.visible{opacity:1;transform:translateY(0);}
  .reveal.d1{transition-delay:.08s;}
  .reveal.d2{transition-delay:.16s;}
  .reveal.d3{transition-delay:.24s;}
  @keyframes pulseDot{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.6;transform:scale(.85);}}

  /* 响应式 */
  @media (max-width:1080px){
    .nav-links{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;
      flex-direction:column;align-items:stretch;gap:0;padding:14px 22px 20px;
      border-bottom:1px solid var(--line);box-shadow:0 18px 40px rgba(23,53,120,.14);}
    .nav-links.open{display:flex;}
    .nav-links a{padding:12px 8px;border-radius:8px;}
    .nav-toggle{display:flex;}
    .nav-actions .btn{display:none;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .intro-grid{grid-template-columns:1fr;}
    .svc-grid{grid-template-columns:repeat(2,1fr);}
    .flow-grid{grid-template-columns:repeat(2,1fr);}
    .case-grid{grid-template-columns:1fr 1fr;}
    .case-card.tall{grid-row:auto;}
    .review-grid{grid-template-columns:repeat(2,1fr);}
    .token-grid{grid-template-columns:1fr;}
    .article-grid{grid-template-columns:repeat(2,1fr);}
    .net-grid{grid-template-columns:repeat(2,1fr);}
    .contact-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:720px){
    .container{padding-left:18px;padding-right:18px;}
    .section-pad{padding:56px 0;}
    .section-pad.tight{padding:44px 0;}
    .hero{padding:44px 0 56px;}
    .hero-visual{grid-template-columns:1fr 1fr;}
    .svc-grid,.flow-grid,.review-grid,.article-grid,.net-grid{grid-template-columns:1fr;}
    .case-grid{grid-template-columns:1fr;}
    .faq-list{grid-template-columns:1fr;}
    .form-row{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .join-banner{padding:32px 24px;}
    .rating-box{padding:24px;}
    .rating-score{font-size:36px;}
    .footer-bottom{justify-content:center;text-align:center;}
    .back-top{right:16px;bottom:90px;}
    .float-kf{right:16px;bottom:20px;padding:11px 15px;font-size:13px;}
    .intro-list{grid-template-columns:1fr;}
  }
  @media (max-width:400px){
    .hero-visual{grid-template-columns:1fr;}
  }