*{margin:0;padding:0;box-sizing:border-box}
    :root{
      --primary:#7c3aed;
      --primary-dark:#5b21b6;
      --primary-light:#a78bfa;
      --accent:#f0abfc;
      --bg:#faf7ff;
      --surface:#ffffff;
      --text:#1e1b2e;
      --text-secondary:#4a4262;
      --text-muted:#6b6280;
      --border:#e9e2f5;
      --shadow-sm:0 1px 3px rgba(92,33,182,0.06);
      --shadow-md:0 8px 24px rgba(92,33,182,0.08);
      --shadow-lg:0 16px 48px rgba(92,33,182,0.12);
      --radius-sm:10px;
      --radius-md:16px;
      --radius-lg:24px;
    }
    html{scroll-behavior:smooth}
    body{
      font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
      color:var(--text);
      background:var(--bg);
      line-height:1.65;
      -webkit-font-smoothing:antialiased;
    }
    .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
    h1,h2,h3,h4{line-height:1.3;font-weight:700}
    h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:12px}
    h3{font-size:clamp(1.1rem,2vw,1.25rem);margin-bottom:8px}
    p{color:var(--text-secondary)}
    a{color:var(--primary);text-decoration:none;transition:color .2s}
    a:hover{color:var(--primary-dark)}
    img{max-width:100%;height:auto;display:block}
    .section{padding:64px 0}
    .section-alt{background:linear-gradient(180deg,#faf7ff 0%,#f3edff 100%)}
    .section-header{text-align:center;max-width:720px;margin:0 auto 40px}
    .section-header p{font-size:1rem;margin-top:8px}
    .eyebrow{
      display:inline-block;font-size:0.8rem;font-weight:600;letter-spacing:0.08em;
      color:var(--primary);text-transform:uppercase;margin-bottom:10px;
      background:rgba(124,58,237,0.08);padding:4px 14px;border-radius:100px;
    }

    /* ===== 顶部导航 ===== */
    .site-header{
      position:sticky;top:0;z-index:100;
      background:rgba(255,255,255,0.92);
      backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
      border-bottom:1px solid var(--border);
    }
    .header-inner{
      display:flex;align-items:center;justify-content:space-between;
      min-height:64px;gap:20px;
    }
    .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
    .ai-page-logo{width:auto;max-height:38px}
    .brand-text{font-size:1.15rem;font-weight:800;color:var(--text);letter-spacing:-0.01em;white-space:nowrap}
    .brand-text span{color:var(--primary)}
    .nav-links{display:flex;align-items:center;gap:0;list-style:none;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      display:block;padding:8px 12px;font-size:0.88rem;font-weight:500;
      color:var(--text-secondary);border-radius:8px;white-space:nowrap;
      transition:background .2s,color .2s;
    }
    .nav-links a:hover{background:rgba(124,58,237,0.07);color:var(--primary)}
    .nav-cta{
      display:inline-flex;align-items:center;gap:6px;
      padding:9px 20px;background:var(--primary);color:#fff!important;
      border-radius:100px;font-weight:600;font-size:0.88rem;
      transition:background .25s,transform .2s,box-shadow .25s;
      box-shadow:0 4px 14px rgba(124,58,237,0.28);white-space:nowrap;
    }
    .nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(124,58,237,0.4)}
    .nav-toggle{
      display:none;background:none;border:1.5px solid var(--border);
      border-radius:8px;padding:8px 10px;cursor:pointer;color:var(--text);
      font-size:1.2rem;line-height:1;
    }

    /* ===== Hero ===== */
    .hero{
      position:relative;overflow:hidden;
      background:
        radial-gradient(ellipse 80% 60% at 20% 10%,rgba(124,58,237,0.10) 0%,transparent 60%),
        radial-gradient(ellipse 60% 70% at 85% 80%,rgba(240,171,252,0.12) 0%,transparent 60%),
        linear-gradient(165deg,#faf7ff 0%,#f3edff 40%,#ede4ff 100%);
      padding:72px 0 80px;
    }
    .hero::before{
      content:"";position:absolute;width:520px;height:520px;border-radius:50%;
      background:radial-gradient(circle,rgba(124,58,237,0.07) 0%,transparent 70%);
      top:-200px;right:-120px;pointer-events:none;
    }
    .hero::after{
      content:"";position:absolute;width:380px;height:380px;border-radius:50%;
      background:radial-gradient(circle,rgba(167,139,250,0.08) 0%,transparent 70%);
      bottom:-180px;left:-80px;pointer-events:none;
    }
    .hero-inner{display:flex;flex-direction:column;align-items:center;text-align:center;position:relative;z-index:1}
    .hero-badge{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(255,255,255,0.7);border:1px solid var(--border);
      padding:6px 18px;border-radius:100px;font-size:0.82rem;font-weight:600;
      color:var(--primary);margin-bottom:22px;
      box-shadow:0 2px 10px rgba(124,58,237,0.08);
    }
    .hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--primary);animation:pulse 2s infinite}
    @keyframes pulse{0%,100%{opacity:1}50%{opacity:0.3}}
    .hero h1{
      font-size:clamp(2rem,5vw,3.2rem);
      font-weight:800;letter-spacing:-0.02em;line-height:1.2;
      max-width:820px;margin-bottom:18px;
      background:linear-gradient(135deg,#1e1b2e 30%,#5b21b6 70%,#7c3aed 100%);
      -webkit-background-clip:text;-webkit-text-fill-color:transparent;
      background-clip:text;
    }
    .hero-sub{font-size:clamp(1rem,1.8vw,1.15rem);color:var(--text-secondary);max-width:640px;margin-bottom:32px;line-height:1.7}
    .hero-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;margin-bottom:44px}
    .btn{
      display:inline-flex;align-items:center;gap:8px;
      padding:14px 34px;border-radius:100px;font-weight:700;font-size:1rem;
      border:none;cursor:pointer;transition:all .25s;
      text-decoration:none;letter-spacing:0.01em;
    }
    .btn-primary{
      background:linear-gradient(135deg,#7c3aed,#5b21b6);color:#fff;
      box-shadow:0 8px 28px rgba(124,58,237,0.32);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 36px rgba(124,58,237,0.45);color:#fff}
    .btn-outline{
      background:rgba(255,255,255,0.7);color:var(--primary);border:1.5px solid var(--primary-light);
      backdrop-filter:blur(8px);
    }
    .btn-outline:hover{background:#fff;border-color:var(--primary);transform:translateY(-2px);color:var(--primary-dark)}
    .hero-stats{
      display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
      width:100%;max-width:800px;
    }
    .hero-stat{
      background:rgba(255,255,255,0.65);border:1px solid rgba(124,58,237,0.12);
      border-radius:var(--radius-md);padding:20px 12px;backdrop-filter:blur(10px);
      transition:transform .3s,box-shadow .3s;
    }
    .hero-stat:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(124,58,237,0.12)}
    .hero-stat .num{font-size:clamp(1.3rem,2.5vw,1.6rem);font-weight:800;color:var(--primary);line-height:1.2}
    .hero-stat .label{font-size:0.78rem;color:var(--text-muted);margin-top:4px;font-weight:500}

    /* ===== 通用卡片/网格 ===== */
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .card{
      background:var(--surface);border:1px solid var(--border);
      border-radius:var(--radius-md);padding:28px;
      transition:transform .3s,box-shadow .3s,border-color .3s;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(124,58,237,0.2)}
    .card-icon{
      width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,rgba(124,58,237,0.1),rgba(167,139,250,0.15));
      font-size:1.4rem;margin-bottom:16px;color:var(--primary);
    }
    .card h3{font-size:1.05rem;margin-bottom:8px}
    .card p{font-size:0.9rem;line-height:1.7}

    /* ===== 标签云 ===== */
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:24px}
    .tag-cloud span{
      display:inline-block;padding:6px 16px;border-radius:100px;
      background:rgba(255,255,255,0.8);border:1px solid var(--border);
      font-size:0.82rem;color:var(--text-secondary);font-weight:500;
      transition:all .2s;cursor:default;
    }
    .tag-cloud span:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:scale(1.04)}

    /* ===== 流程步骤 ===== */
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
    .step{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
      padding:28px 24px;position:relative;transition:transform .3s,box-shadow .3s;
    }
    .step:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
    .step::before{
      counter-increment:step;content:counter(step);
      display:flex;align-items:center;justify-content:center;
      width:40px;height:40px;border-radius:50%;
      background:linear-gradient(135deg,#7c3aed,#a78bfa);color:#fff;
      font-weight:800;font-size:1rem;margin-bottom:14px;
    }
    .step h3{font-size:1rem;margin-bottom:6px}
    .step p{font-size:0.86rem;line-height:1.65}

    /* ===== 对比表格 ===== */
    .table-wrap{overflow-x:auto;border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface);-webkit-overflow-scrolling:touch}
    table{width:100%;border-collapse:collapse;min-width:640px;font-size:0.9rem}
    thead{background:linear-gradient(135deg,#f3edff,#ede4ff)}
    th{padding:16px 20px;text-align:left;font-weight:700;color:var(--text);border-bottom:2px solid var(--border);white-space:nowrap}
    td{padding:14px 20px;border-bottom:1px solid var(--border);color:var(--text-secondary)}
    tbody tr:last-child td{border-bottom:none}
    tbody tr{transition:background .2s}
    tbody tr:hover{background:rgba(124,58,237,0.03)}
    .rating-box{
      display:flex;align-items:center;gap:20px;flex-wrap:wrap;
      background:linear-gradient(135deg,#faf7ff,#f3edff);
      border:1px solid var(--border);border-radius:var(--radius-lg);
      padding:28px 32px;margin-bottom:28px;
    }
    .rating-score{display:flex;align-items:baseline;gap:4px}
    .rating-score .big{font-size:2.8rem;font-weight:900;color:var(--primary);line-height:1}
    .rating-score .total{font-size:1.1rem;color:var(--text-muted);font-weight:600}
    .rating-stars{color:#f59e0b;font-size:1.3rem;letter-spacing:2px}
    .rating-desc{flex:1;min-width:200px;font-size:0.92rem;color:var(--text-secondary)}

    /* ===== FAQ ===== */
    .faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
    .faq-item{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
      overflow:hidden;transition:box-shadow .25s,border-color .25s;
    }
    .faq-item:hover{border-color:rgba(124,58,237,0.2);box-shadow:var(--shadow-sm)}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:18px 24px;background:none;border:none;cursor:pointer;
      font-size:0.95rem;font-weight:600;color:var(--text);text-align:left;
      font-family:inherit;line-height:1.5;transition:color .2s;
    }
    .faq-q:hover{color:var(--primary)}
    .faq-q .icon{flex-shrink:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;
      font-size:1.2rem;color:var(--primary);transition:transform .3s;font-weight:400}
    .faq-item.open .faq-q .icon{transform:rotate(45deg)}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s ease;padding:0 24px}
    .faq-item.open .faq-a{max-height:300px;padding:0 24px 20px}
    .faq-a p{font-size:0.9rem;line-height:1.75;color:var(--text-muted)}

    /* ===== 评论 ===== */
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .review-card{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
      padding:24px;transition:transform .3s,box-shadow .3s;
    }
    .review-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
    .review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
    .review-avatar{
      width:42px;height:42px;border-radius:50%;
      background:linear-gradient(135deg,#a78bfa,#7c3aed);
      display:flex;align-items:center;justify-content:center;
      color:#fff;font-weight:700;font-size:1rem;flex-shrink:0;
    }
    .review-name{font-weight:600;font-size:0.92rem;color:var(--text)}
    .review-role{font-size:0.78rem;color:var(--text-muted)}
    .review-stars{color:#f59e0b;font-size:0.85rem;margin-bottom:8px;letter-spacing:1px}
    .review-text{font-size:0.88rem;line-height:1.7;color:var(--text-secondary)}

    /* ===== 案例 ===== */
    .case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
    .case-card{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
      overflow:hidden;transition:transform .3s,box-shadow .3s;
    }
    .case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
    .case-img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#f3edff}
    .case-body{padding:20px 24px}
    .case-body h3{font-size:1rem;margin-bottom:6px}
    .case-body p{font-size:0.86rem;line-height:1.65}
    .case-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
    .case-tags span{font-size:0.75rem;padding:3px 10px;border-radius:100px;background:rgba(124,58,237,0.07);color:var(--primary);font-weight:500}

    /* ===== 文章 ===== */
    .article-list{display:flex;flex-direction:column;gap:14px;max-width:820px;margin:0 auto}
    .article-item{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
      padding:18px 24px;transition:all .25s;
    }
    .article-item:hover{border-color:rgba(124,58,237,0.25);box-shadow:var(--shadow-sm);transform:translateX(4px)}
    .article-item .art-title{font-weight:600;font-size:0.92rem;color:var(--text)}
    .article-item .art-more{font-size:0.82rem;color:var(--primary);font-weight:600;white-space:nowrap}

    /* ===== 表单 ===== */
    .form-card{
      background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
      padding:36px;box-shadow:var(--shadow-md);
    }
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .form-group{display:flex;flex-direction:column;gap:6px}
    .form-group.full{grid-column:1/-1}
    .form-group label{font-size:0.85rem;font-weight:600;color:var(--text)}
    .form-group input,.form-group select,.form-group textarea{
      padding:12px 16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);
      font-size:0.9rem;font-family:inherit;color:var(--text);background:#faf7ff;
      transition:border-color .2s,box-shadow .2s;outline:none;width:100%;
    }
    .form-group input:focus,.form-group select:focus,.form-group textarea:focus{
      border-color:var(--primary);box-shadow:0 0 0 3px rgba(124,58,237,0.1);background:#fff;
    }
    .form-group textarea{resize:vertical;min-height:110px}
    .form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237c3aed' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}
    .form-submit{
      grid-column:1/-1;display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:14px 34px;border-radius:100px;font-weight:700;font-size:1rem;
      background:linear-gradient(135deg,#7c3aed,#5b21b6);color:#fff;border:none;cursor:pointer;
      transition:all .25s;box-shadow:0 8px 24px rgba(124,58,237,0.3);margin-top:6px;
    }
    .form-submit:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(124,58,237,0.42)}

    /* ===== 联系信息 ===== */
    .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
    .contact-info{display:flex;flex-direction:column;gap:20px}
    .contact-item{display:flex;gap:14px;align-items:flex-start}
    .contact-icon{
      width:42px;height:42px;border-radius:10px;flex-shrink:0;
      background:rgba(124,58,237,0.08);display:flex;align-items:center;justify-content:center;
      font-size:1.1rem;color:var(--primary);
    }
    .contact-item .ci-label{font-size:0.8rem;color:var(--text-muted);font-weight:500;margin-bottom:2px}
    .contact-item .ci-value{font-size:0.92rem;color:var(--text);font-weight:600;word-break:break-all}
    .qr-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;text-align:center}
    .qr-wrap img{width:160px;height:160px;object-fit:contain;margin:0 auto 12px;border-radius:8px}
    .qr-wrap p{font-size:0.82rem;color:var(--text-muted)}

    /* ===== 页脚 ===== */
    .site-footer{
      background:linear-gradient(180deg,#1e1b2e,#16132a);
      color:#c4bdd8;padding:48px 0 24px;
    }
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
    .footer-brand .brand-text{color:#fff;margin-bottom:10px;font-size:1.1rem}
    .footer-brand p{color:#a89cc0;font-size:0.86rem;line-height:1.7;max-width:300px}
    .footer-col h4{color:#fff;font-size:0.92rem;margin-bottom:14px;font-weight:600}
    .footer-col a{display:block;color:#a89cc0;font-size:0.84rem;padding:4px 0;transition:color .2s}
    .footer-col a:hover{color:#c4b5fd}
    .footer-bottom{
      border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;
      display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
      font-size:0.8rem;color:#8b7fa8;
    }
    .footer-bottom a{color:#a89cc0}
    .footer-bottom a:hover{color:#c4b5fd}
    .friend-links{display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:6px}
    .friend-links a{font-size:0.8rem;color:#a89cc0;padding:2px 0}

    /* ===== 浮动客服 ===== */
    .float-service{
      position:fixed;bottom:28px;right:24px;z-index:90;
      display:flex;flex-direction:column;gap:10px;align-items:flex-end;
    }
    .float-btn{
      width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,#7c3aed,#5b21b6);color:#fff;font-size:1.25rem;
      box-shadow:0 6px 20px rgba(124,58,237,0.4);cursor:pointer;border:none;
      transition:transform .25s,box-shadow .25s;text-decoration:none;
    }
    .float-btn:hover{transform:scale(1.08);box-shadow:0 8px 28px rgba(124,58,237,0.55);color:#fff}
    .float-btn.back-top{background:#fff;color:var(--primary);border:1.5px solid var(--border);box-shadow:var(--shadow-sm);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s,transform .25s}
    .float-btn.back-top.show{opacity:1;visibility:visible}
    .float-btn.back-top:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

    /* ===== 动画 ===== */
    .reveal{opacity:0;transform:translateY(28px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:translateY(0)}
    .reveal-delay-1{transition-delay:.08s}
    .reveal-delay-2{transition-delay:.16s}
    .reveal-delay-3{transition-delay:.24s}
    @media (prefers-reduced-motion:reduce){
      *{animation:none!important;transition:none!important}
      .reveal{opacity:1;transform:none}
    }

    /* ===== 响应式 ===== */
    @media(max-width:1024px){
      .grid-3{grid-template-columns:repeat(2,1fr)}
      .grid-4{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr)}
      .reviews{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
      .hero-stats{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{padding:0 16px}
      .section{padding:44px 0}
      .nav-links{
        display:none;position:absolute;top:100%;left:0;right:0;
        background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);
        flex-direction:column;padding:12px 16px;gap:2px;
        border-bottom:1px solid var(--border);box-shadow:0 12px 32px rgba(0,0,0,0.06);
        align-items:stretch;
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:10px 14px;font-size:0.92rem}
      .nav-toggle{display:block}
      .header-inner{position:relative}
      .hero{padding:48px 0 56px}
      .hero-actions{flex-direction:column;align-items:stretch;width:100%;max-width:320px}
      .hero-actions .btn{justify-content:center}
      .grid-3,.grid-2,.grid-4,.steps,.reviews,.case-grid,.contact-grid,.form-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .rating-box{flex-direction:column;align-items:flex-start;gap:12px;padding:24px}
      .form-card{padding:24px 20px}
      .table-wrap{font-size:0.82rem}
      th,td{padding:12px 14px}
      .float-service{bottom:20px;right:16px}
    }
    @media(max-width:480px){
      .hero h1{font-size:1.75rem}
      .hero-sub{font-size:0.92rem}
      .hero-stat{padding:14px 8px}
      .hero-stat .num{font-size:1.15rem}
      .hero-stat .label{font-size:0.7rem}
    }