* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary: #4a2eff;
      --primary-glow: #8a6dff;
      --secondary: #00e5c0;
      --accent: #ff7b3a;
      --neon-pink: #ff4fa3;
      --dark: #0e0a28;
      --bg-light: #f5f3ff;
      --bg-card: #ffffff;
      --text-dark: #1a153a;
      --text-body: #3b3560;
      --text-muted: #6b6494;
      --border-light: #e4deff;
      --gradient-hero: linear-gradient(135deg, #4a2eff 0%, #8a6dff 40%, #ff4fa3 100%);
      --gradient-btn: linear-gradient(120deg, #4a2eff, #8a6dff, #ff4fa3);
      --shadow-sm: 0 4px 16px rgba(74, 46, 255, 0.08);
      --shadow-md: 0 8px 32px rgba(74, 46, 255, 0.12);
      --shadow-lg: 0 16px 48px rgba(74, 46, 255, 0.18);
      --radius-sm: 12px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-full: 999px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font);
      background-color: var(--bg-light);
      background-image: 
        radial-gradient(circle at 15% 20%, rgba(138, 109, 255, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(255, 79, 163, 0.10) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(0, 229, 192, 0.06) 0%, transparent 60%);
      background-attachment: fixed;
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* ========== 导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(74, 46, 255, 0.08);
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: var(--shadow-sm);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-top: 14px;
      padding-bottom: 14px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      flex-shrink: 0;
    }

    .brand .ai-page-logo {
      display: block;
      height: 36px;
      width: auto;
    }

    .brand-text {
      font-size: 1.15rem;
      font-weight: 800;
      background: var(--gradient-btn);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
    }

    .nav-links a {
      display: block;
      padding: 8px 12px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-body);
      text-decoration: none;
      border-radius: var(--radius-full);
      transition: color 0.25s, background 0.25s;
      white-space: nowrap;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(74, 46, 255, 0.06);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      padding: 8px 20px;
      font-size: 0.88rem;
      font-weight: 600;
      color: #fff;
      background: var(--gradient-btn);
      border: none;
      border-radius: var(--radius-full);
      text-decoration: none;
      white-space: nowrap;
      transition: transform 0.25s, box-shadow 0.25s;
      box-shadow: 0 4px 14px rgba(74, 46, 255, 0.3);
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(74, 46, 255, 0.4);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2.5px;
      background: var(--text-dark);
      border-radius: 2px;
      transition: transform 0.3s, opacity 0.3s;
    }

    /* ========== Hero ========== */
    .hero {
      position: relative;
      overflow: hidden;
      padding: 80px 0 90px;
      background: linear-gradient(160deg, #f0ecff 0%, #faf8ff 35%, #fdf0f8 80%);
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: 
        radial-gradient(circle at 20% 30%, rgba(74, 46, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 79, 163, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 70% 80%, rgba(0, 229, 192, 0.10) 0%, transparent 50%);
      pointer-events: none;
    }

    .hero::after {
      content: '';
      position: absolute;
      width: 500px;
      height: 500px;
      top: -200px;
      right: -150px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(138, 109, 255, 0.10), transparent 70%);
      animation: floatOrb 8s ease-in-out infinite alternate;
      pointer-events: none;
    }

    @keyframes floatOrb {
      0% { transform: translate(0, 0) scale(1); }
      100% { transform: translate(-40px, 40px) scale(1.1); }
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 820px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid rgba(74, 46, 255, 0.18);
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      backdrop-filter: blur(8px);
      animation: fadeUp 0.7s ease both;
    }

    .hero-badge .dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--secondary);
      animation: pulseDot 1.8s ease-in-out infinite;
    }

    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.4); }
    }

    .hero h1 {
      font-size: clamp(1.9rem, 5vw, 3.1rem);
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.5px;
      color: var(--dark);
      margin-bottom: 20px;
      animation: fadeUp 0.7s 0.1s ease both;
    }

    .hero h1 .highlight {
      background: var(--gradient-btn);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero-desc {
      font-size: clamp(1rem, 1.6vw, 1.15rem);
      color: var(--text-body);
      max-width: 640px;
      margin: 0 auto 32px;
      animation: fadeUp 0.7s 0.2s ease both;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 14px;
      animation: fadeUp 0.7s 0.3s ease both;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
    }

    .btn-primary {
      color: #fff;
      background: var(--gradient-btn);
      box-shadow: 0 6px 24px rgba(74, 46, 255, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 10px 32px rgba(74, 46, 255, 0.45);
    }

    .btn-outline {
      color: var(--primary);
      background: rgba(255, 255, 255, 0.7);
      border: 1.5px solid rgba(74, 46, 255, 0.25);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      background: #fff;
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }

    .hero-metrics {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 32px;
      margin-top: 56px;
      animation: fadeUp 0.7s 0.45s ease both;
    }

    .metric-item {
      text-align: center;
    }

    .metric-value {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 900;
      background: var(--gradient-btn);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .metric-label {
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-top: 2px;
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* ========== 通用区块 ========== */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background: rgba(255, 255, 255, 0.55);
      backdrop-filter: blur(4px);
    }

    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 52px;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 16px;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(74, 46, 255, 0.08);
      border-radius: var(--radius-full);
      margin-bottom: 16px;
    }

    .section-header h2 {
      font-size: clamp(1.6rem, 3.2vw, 2.3rem);
      font-weight: 800;
      color: var(--dark);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-header p {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* ========== 平台介绍 ========== */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .intro-text h3 {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .intro-text p {
      font-size: 0.95rem;
      color: var(--text-body);
      margin-bottom: 14px;
      line-height: 1.75;
    }

    .intro-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .intro-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 16px;
      background: var(--bg-card);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }

    .intro-feature-item:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .intro-feature-icon {
      flex-shrink: 0;
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: rgba(74, 46, 255, 0.08);
      color: var(--primary);
      font-size: 1.1rem;
    }

    .intro-feature-item strong {
      display: block;
      font-size: 0.9rem;
      color: var(--text-dark);
      margin-bottom: 2px;
    }

    .intro-feature-item span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* ========== 服务能力卡片 ========== */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--gradient-btn);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(74, 46, 255, 0.2);
    }

    .service-card:hover::before {
      opacity: 1;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      background: rgba(74, 46, 255, 0.08);
      color: var(--primary);
      font-size: 1.3rem;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .service-card p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* ========== 流程步骤 ========== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }

    .process-step {
      position: relative;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 32px 22px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      text-align: center;
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .process-step::before {
      counter-increment: step;
      content: counter(step, decimal-leading-zero);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      font-size: 1rem;
      font-weight: 800;
      color: #fff;
      background: var(--gradient-btn);
      margin-bottom: 16px;
      box-shadow: 0 4px 14px rgba(74, 46, 255, 0.3);
    }

    .process-step h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ========== 对比评测 ========== */
    .rating-hero {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 40px;
      margin-bottom: 40px;
      padding: 32px;
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-light);
    }

    .rating-score {
      text-align: center;
    }

    .rating-score .score-number {
      font-size: 3.4rem;
      font-weight: 900;
      background: var(--gradient-btn);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      line-height: 1.1;
    }

    .rating-score .score-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .rating-stars {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }

    .stars-row {
      display: flex;
      gap: 4px;
      font-size: 1.5rem;
      color: #ffb800;
    }

    .rating-stars p {
      font-size: 0.9rem;
      color: var(--text-body);
      font-weight: 600;
    }

    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-card);
      font-size: 0.9rem;
      min-width: 640px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
    }

    .compare-table thead th {
      background: rgba(74, 46, 255, 0.06);
      font-weight: 700;
      color: var(--dark);
      font-size: 0.85rem;
      letter-spacing: 0.5px;
    }

    .compare-table tbody tr:hover {
      background: rgba(74, 46, 255, 0.03);
    }

    .compare-table .highlight-cell {
      color: var(--primary);
      font-weight: 700;
    }

    .compare-table .check {
      color: var(--secondary);
      font-weight: 700;
    }

    /* ========== 客户评论 ========== */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testimonial-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.3s, box-shadow 0.3s;
      display: flex;
      flex-direction: column;
    }

    .testimonial-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .testimonial-stars {
      display: flex;
      gap: 3px;
      color: #ffb800;
      font-size: 0.95rem;
      margin-bottom: 14px;
    }

    .testimonial-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 18px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--gradient-btn);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      flex-shrink: 0;
    }

    .author-info strong {
      display: block;
      font-size: 0.88rem;
      color: var(--text-dark);
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* ========== FAQ ========== */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: box-shadow 0.3s;
    }

    .faq-item:hover {
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      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-dark);
      text-align: left;
      font-family: var(--font);
      transition: color 0.25s;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: rgba(74, 46, 255, 0.08);
      color: var(--primary);
      font-size: 1rem;
      font-weight: 700;
      transition: transform 0.3s, background 0.3s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #fff;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 18px;
    }

    .faq-answer p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* ========== 表单 ========== */
    .contact-section {
      background: linear-gradient(150deg, #ede8ff 0%, #fdf0f8 100%);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
      align-items: start;
    }

    .contact-info h2 {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 0.95rem;
      color: var(--text-body);
      margin-bottom: 28px;
      line-height: 1.75;
    }

    .contact-detail-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-detail-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
      color: var(--text-body);
    }

    .contact-detail-list .icon {
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: rgba(74, 46, 255, 0.08);
      color: var(--primary);
      font-size: 1rem;
      flex-shrink: 0;
    }

    .form-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-light);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.9rem;
      font-family: var(--font);
      color: var(--text-dark);
      background: #faf9ff;
      border: 1.5px solid var(--border-light);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.25s, box-shadow 0.25s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary-glow);
      box-shadow: 0 0 0 3px rgba(74, 46, 255, 0.08);
    }

    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      background: var(--gradient-btn);
      border: none;
      border-radius: var(--radius-full);
      cursor: pointer;
      font-family: var(--font);
      transition: transform 0.25s, box-shadow 0.25s;
      box-shadow: 0 6px 20px rgba(74, 46, 255, 0.3);
    }

    .form-submit-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(74, 46, 255, 0.4);
    }

    /* ========== 案例展示 ========== */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .case-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #f0ecff;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 20px 22px;
    }

    .case-body h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ========== 文章列表 ========== */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 26px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      text-decoration: none;
      display: flex;
      flex-direction: column;
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .article-tag {
      display: inline-block;
      padding: 3px 12px;
      font-size: 0.72rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(74, 46, 255, 0.08);
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      align-self: flex-start;
    }

    .article-card h3 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark);
      line-height: 1.45;
      margin-bottom: 10px;
    }

    .article-card p {
      font-size: 0.83rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }

    /* ========== 标签 / 友情链接 ========== */
    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .tag-item {
      padding: 7px 18px;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--text-body);
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-full);
      text-decoration: none;
      transition: all 0.25s;
    }

    .tag-item:hover {
      color: var(--primary);
      border-color: rgba(74, 46, 255, 0.3);
      background: rgba(74, 46, 255, 0.04);
      transform: translateY(-2px);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px 28px;
      padding: 20px 0;
    }

    .friend-links a {
      font-size: 0.85rem;
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.25s;
    }

    .friend-links a:hover {
      color: var(--primary);
    }

    /* ========== 页脚 ========== */
    .site-footer {
      background: var(--dark);
      color: #c8c2e8;
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand .ai-page-logo {
      height: 32px;
      width: auto;
      margin-bottom: 12px;
      display: block;
    }

    .footer-brand p {
      font-size: 0.85rem;
      line-height: 1.7;
      color: #a09acc;
      margin-bottom: 16px;
    }

    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li a {
      font-size: 0.83rem;
      color: #a09acc;
      text-decoration: none;
      transition: color 0.25s;
    }

    .footer-col ul li a:hover {
      color: var(--secondary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .footer-bottom p {
      font-size: 0.8rem;
      color: #7c76a8;
    }

    .footer-bottom .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }

    .footer-bottom .footer-links a {
      font-size: 0.8rem;
      color: #a09acc;
      text-decoration: none;
    }

    .footer-bottom .footer-links a:hover {
      color: var(--secondary);
    }

    /* ========== 浮动客服 ========== */
    .floating-service {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
      color: var(--primary);
      font-size: 1.2rem;
      cursor: pointer;
      transition: transform 0.25s, box-shadow 0.25s;
      text-decoration: none;
    }

    .float-btn:hover {
      transform: scale(1.08);
      box-shadow: var(--shadow-lg);
    }

    .float-btn.primary {
      background: var(--gradient-btn);
      color: #fff;
      border: none;
    }

    .back-to-top {
      display: none;
    }

    .back-to-top.visible {
      display: flex;
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 12px 20px 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
        gap: 2px;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        padding: 10px 12px;
        width: 100%;
        font-size: 0.92rem;
      }

      .menu-toggle {
        display: flex;
      }

      .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
      }
      .menu-toggle.active span:nth-child(2) {
        opacity: 0;
      }
      .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
      }

      .hero {
        padding: 56px 0 64px;
      }

      .hero-metrics {
        gap: 20px;
      }

      .section {
        padding: 56px 0;
      }

      .services-grid {
        grid-template-columns: 1fr;
      }

      .process-steps {
        grid-template-columns: 1fr;
      }

      .testimonials-grid {
        grid-template-columns: 1fr;
      }

      .cases-grid,
      .articles-grid {
        grid-template-columns: 1fr;
      }

      .form-row {
        grid-template-columns: 1fr;
      }

      .rating-hero {
        flex-direction: column;
        gap: 24px;
        padding: 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .intro-features {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 480px) {
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions .btn {
        width: 100%;
      }
      .hero-metrics {
        flex-direction: column;
        gap: 16px;
      }
      .floating-service {
        right: 12px;
        bottom: 70px;
      }
      .float-btn {
        width: 44px;
        height: 44px;
        font-size: 1rem;
      }
      .form-card {
        padding: 24px 18px;
      }
    }

    /* 滚动渐入 */
    .reveal {
      opacity: 0;
      transform: translateY(32px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }