* { margin: 0; padding: 0; box-sizing: border-box; }
    :root {
      --bg-base: #0b0e1a;
      --bg-deep: #0f1326;
      --bg-card: rgba(255,255,255,0.04);
      --border-glow: rgba(0,255,240,0.18);
      --text-main: #eef2ff;
      --text-sub: #a8b3d6;
      --neon-cyan: #00f5e0;
      --neon-magenta: #c44dff;
      --neon-blue: #3b82f6;
      --neon-green: #39ffb6;
      --glow-sm: 0 0 12px rgba(0,245,224,0.15);
      --glow-md: 0 0 28px rgba(0,245,224,0.12);
      --radius-card: 18px;
      --radius-btn: 40px;
      --container-max: 1200px;
      --container-pad: 20px;
      --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font);
      background: var(--bg-base);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      background-image:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0,245,224,0.06), transparent 60%),
        radial-gradient(ellipse 60% 40% at 90% 20%, rgba(196,77,255,0.06), transparent 50%),
        radial-gradient(ellipse 70% 50% at 10% 60%, rgba(59,130,246,0.06), transparent 50%),
        radial-gradient(ellipse 60% 40% at 50% 100%, rgba(57,255,182,0.04), transparent 50%);
      background-attachment: fixed;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 var(--container-pad);
      width: 100%;
    }
    .section {
      padding: 72px 0;
      position: relative;
    }
    .section-inner {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 var(--container-pad);
      width: 100%;
    }
    .section-title {
      font-size: clamp(1.6rem, 4vw, 2.2rem);
      font-weight: 700;
      letter-spacing: 0.02em;
      margin-bottom: 12px;
      color: var(--text-main);
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 48px;
      height: 3px;
      border-radius: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
      box-shadow: var(--glow-sm);
    }
    .section-desc {
      color: var(--text-sub);
      font-size: 1rem;
      max-width: 680px;
      margin-bottom: 40px;
      line-height: 1.8;
    }
    .tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 100px;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      border: 1px solid var(--border-glow);
      color: var(--neon-cyan);
      background: rgba(0,245,224,0.06);
      margin-bottom: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
      text-align: center;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
      color: #0b0e1a;
      box-shadow: 0 0 20px rgba(0,245,224,0.25);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 36px rgba(0,245,224,0.45);
    }
    .btn-outline {
      background: transparent;
      color: var(--neon-cyan);
      border: 1.5px solid rgba(0,245,224,0.35);
    }
    .btn-outline:hover {
      background: rgba(0,245,224,0.08);
      border-color: var(--neon-cyan);
      box-shadow: var(--glow-sm);
    }
    /* ===== 顶部导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11,14,26,0.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0,245,224,0.08);
      transition: background 0.3s;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 64px;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 var(--container-pad);
      width: 100%;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .nav-brand img { height: 32px; width: auto; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-sub);
      border-radius: 8px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links li a:hover {
      color: var(--neon-cyan);
      background: rgba(0,245,224,0.06);
    }
    .nav-cta {
      flex-shrink: 0;
    }
    .nav-cta .btn {
      padding: 9px 22px;
      font-size: 0.85rem;
    }
    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-glow);
      border-radius: 8px;
      padding: 6px 10px;
      cursor: pointer;
      color: var(--neon-cyan);
      font-size: 1.3rem;
      line-height: 1;
    }
    /* ===== Hero 首屏（无图） ===== */
    .hero {
      position: relative;
      padding: 100px 0 80px;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle 600px at 20% 30%, rgba(0,245,224,0.07), transparent 70%),
        radial-gradient(circle 500px at 80% 60%, rgba(196,77,255,0.07), transparent 70%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-left h1 {
      font-size: clamp(2rem, 5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.01em;
      margin-bottom: 20px;
    }
    .hero-left h1 .grad {
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      color: var(--text-sub);
      font-size: 1.05rem;
      line-height: 1.85;
      margin-bottom: 32px;
      max-width: 520px;
    }
    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 32px;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .hero-tags span {
      font-size: 0.78rem;
      padding: 4px 12px;
      border-radius: 100px;
      border: 1px solid rgba(255,255,255,0.08);
      color: var(--text-sub);
      background: rgba(255,255,255,0.03);
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      backdrop-filter: blur(12px);
      transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: var(--glow-md);
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }
    .stat-label {
      font-size: 0.85rem;
      color: var(--text-sub);
      margin-top: 4px;
    }
    .logo-strip {
      margin-top: 40px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px 24px;
      opacity: 0.55;
      font-size: 0.82rem;
      color: var(--text-sub);
      font-weight: 500;
      letter-spacing: 0.04em;
    }
    /* ===== 通用卡片 ===== */
    .card {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      backdrop-filter: blur(12px);
      transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    }
    .card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: var(--glow-md);
    }
    .card-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .card-desc {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.7;
    }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
    /* ===== 服务卡片 ===== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-card);
      padding: 24px;
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
      opacity: 0;
      transition: opacity 0.3s;
    }
    .service-card:hover::before { opacity: 1; }
    .service-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: var(--glow-md);
    }
    .service-icon {
      width: 42px; height: 42px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      margin-bottom: 14px;
      background: rgba(0,245,224,0.08);
      color: var(--neon-cyan);
      border: 1px solid rgba(0,245,224,0.15);
    }
    /* ===== 流程 ===== */
    .step-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      position: relative;
      counter-increment: step;
      transition: all 0.3s;
    }
    .step-item:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
    }
    .step-item::before {
      content: counter(step, decimal-leading-zero);
      font-size: 2rem;
      font-weight: 800;
      color: rgba(0,245,224,0.15);
      display: block;
      margin-bottom: 8px;
      line-height: 1;
    }
    .step-item h4 {
      font-size: 1rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .step-item p {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.7;
    }
    /* ===== 对比表格 ===== */
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-card);
      border: 1px solid rgba(255,255,255,0.06);
      background: var(--bg-card);
    }
    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      min-width: 640px;
    }
    thead th {
      text-align: left;
      padding: 16px 20px;
      background: rgba(0,245,224,0.04);
      color: var(--neon-cyan);
      font-weight: 600;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      white-space: nowrap;
    }
    tbody td {
      padding: 14px 20px;
      border-bottom: 1px solid rgba(255,255,255,0.04);
      color: var(--text-sub);
    }
    tbody tr:last-child td { border-bottom: none; }
    tbody tr:hover { background: rgba(0,245,224,0.03); }
    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 2px 10px;
      border-radius: 100px;
      font-size: 0.78rem;
      font-weight: 700;
      background: rgba(0,245,224,0.12);
      color: var(--neon-cyan);
    }
    .stars { color: #facc15; letter-spacing: 2px; }
    /* ===== 评论 ===== */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-card);
      padding: 24px;
      transition: all 0.3s;
    }
    .review-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-3px);
    }
    .review-stars { color: #facc15; font-size: 0.85rem; margin-bottom: 10px; letter-spacing: 2px; }
    .review-text {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.75;
      margin-bottom: 16px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .review-avatar {
      width: 34px; height: 34px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 700;
      color: #0b0e1a;
      flex-shrink: 0;
    }
    .review-name { font-size: 0.85rem; font-weight: 600; color: var(--text-main); }
    .review-role { font-size: 0.75rem; color: var(--text-sub); }
    /* ===== FAQ ===== */
    .faq-list { display: flex; flex-direction: column; gap: 10px; }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: 14px;
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item.active { border-color: var(--border-glow); }
    .faq-q {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding: 16px 20px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.95rem;
      user-select: none;
    }
    .faq-q::after {
      content: '+';
      font-size: 1.3rem;
      color: var(--neon-cyan);
      transition: transform 0.3s;
      flex-shrink: 0;
      line-height: 1;
    }
    .faq-item.active .faq-q::after { transform: rotate(45deg); }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s;
      padding: 0 20px;
      color: var(--text-sub);
      font-size: 0.88rem;
      line-height: 1.8;
    }
    .faq-item.active .faq-a { max-height: 300px; padding: 0 20px 16px; }
    /* ===== 表单 ===== */
    .form-card {
      background: var(--bg-card);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-card);
      padding: 32px;
      backdrop-filter: blur(12px);
    }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .form-group { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
    .form-group label {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--text-sub);
      letter-spacing: 0.02em;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 10px;
      padding: 11px 14px;
      color: var(--text-main);
      font-family: var(--font);
      font-size: 0.9rem;
      transition: border-color 0.2s, box-shadow 0.2s;
      outline: none;
      width: 100%;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 0 3px rgba(0,245,224,0.1);
    }
    .form-group textarea { resize: vertical; min-height: 100px; }
    .form-group select option { background: #1a1e33; color: #eef2ff; }
    .form-submit { width: 100%; margin-top: 8px; }
    .form-note {
      font-size: 0.78rem;
      color: var(--text-sub);
      text-align: center;
      margin-top: 12px;
    }
    /* ===== 页脚 ===== */
    .site-footer {
      background: rgba(6,8,16,0.92);
      border-top: 1px solid rgba(0,245,224,0.08);
      padding: 52px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 32px;
      padding-bottom: 36px;
    }
    .footer-brand img { height: 30px; width: auto; margin-bottom: 12px; }
    .footer-brand p {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.8;
      max-width: 280px;
    }
    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a {
      font-size: 0.83rem;
      color: var(--text-sub);
      transition: color 0.2s;
    }
    .footer-links a:hover { color: var(--neon-cyan); }
    .footer-contact {
      font-size: 0.83rem;
      color: var(--text-sub);
      line-height: 2;
    }
    .footer-contact span { color: var(--neon-cyan); }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding: 18px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.78rem;
      color: var(--text-sub);
    }
    .footer-bottom a { color: var(--text-sub); }
    .footer-bottom a:hover { color: var(--neon-cyan); }
    /* ===== 浮动客服 ===== */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: center;
    }
    .kefu-btn {
      width: 52px; height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(0,245,224,0.3);
      transition: transform 0.3s, box-shadow 0.3s;
      border: none;
      color: #0b0e1a;
      font-size: 1.3rem;
    }
    .kefu-btn:hover { transform: scale(1.08); box-shadow: 0 0 32px rgba(0,245,224,0.55); }
    .kefu-pop {
      position: absolute;
      right: 64px;
      bottom: 0;
      width: 180px;
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--border-glow);
      background: #0f1326;
      box-shadow: 0 8px 30px rgba(0,0,0,0.5);
      display: none;
    }
    .kefu-pop.active { display: block; }
    .kefu-pop img { width: 100%; display: block; }
    .kefu-pop p {
      text-align: center;
      font-size: 0.75rem;
      color: var(--text-sub);
      padding: 8px;
    }
    .back-top {
      position: fixed;
      right: 20px;
      bottom: 96px;
      z-index: 98;
      width: 42px; height: 42px;
      border-radius: 50%;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.12);
      color: var(--text-sub);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      transition: all 0.3s;
    }
    .back-top:hover {
      background: rgba(0,245,224,0.12);
      color: var(--neon-cyan);
      border-color: var(--border-glow);
    }
    /* ===== 动画 ===== */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .delay-1 { transition-delay: 0.08s; }
    .delay-2 { transition-delay: 0.16s; }
    .delay-3 { transition-delay: 0.24s; }
    .delay-4 { transition-delay: 0.32s; }
    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero-stats { grid-template-columns: repeat(4, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 860px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(11,14,26,0.97);
        backdrop-filter: blur(18px);
        flex-direction: column;
        padding: 12px 20px 20px;
        border-bottom: 1px solid var(--border-glow);
        z-index: 99;
      }
      .nav-links.open { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { padding: 10px 12px; font-size: 0.95rem; }
      .nav-toggle { display: block; }
      .nav-cta { display: none; }
      .step-list { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: 1fr; }
      .grid-2 { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .hero { padding: 64px 0 52px; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .section { padding: 48px 0; }
      .step-list { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .form-row { grid-template-columns: 1fr; }
      .form-card { padding: 22px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .section-title { font-size: 1.4rem; }
      .hero-left h1 { font-size: 1.8rem; }
      .table-wrap { font-size: 0.8rem; }
      thead th, tbody td { padding: 10px 12px; }
    }