:root {
      --bg-primary: #f8fafc;
      --bg-secondary: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      
      --neon-cyan: #06b6d4;
      --neon-purple: #8b5cf6;
      --neon-pink: #ec4899;
      --neon-amber: #f59e0b;
      --neon-blue: #3b82f6;

      --grad-neon: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);
      --grad-cyan-blue: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
      --grad-purple-pink: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
      --grad-card-border: linear-gradient(135deg, rgba(6, 182, 212, 0.4), rgba(139, 92, 246, 0.4));
      
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08);
      --shadow-neon: 0 8px 25px rgba(6, 182, 212, 0.25);
      
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 15%, rgba(6, 182, 212, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 90% 35%, rgba(236, 72, 153, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 75%, rgba(139, 92, 246, 0.06) 0%, transparent 40%);
      background-attachment: fixed;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

    /* 容器体系统一 */
    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main);
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: block;
      transition: all 0.25s ease;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--neon-cyan);
      background: rgba(6, 182, 212, 0.08);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-neon {
      background: var(--grad-neon);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
    }
    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(236, 72, 153, 0.4);
    }
    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(6, 182, 212, 0.04);
      transform: translateY(-2px);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 通用区块排版 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }
    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      background: rgba(6, 182, 212, 0.1);
      color: #0284c7;
      border: 1px solid rgba(6, 182, 212, 0.3);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero (严格无图片) */
    .hero-section {
      padding: 70px 0 90px;
      position: relative;
      text-align: center;
      background: radial-gradient(circle at 50% 30%, rgba(6, 182, 212, 0.12) 0%, rgba(139, 92, 246, 0.08) 35%, transparent 70%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid rgba(139, 92, 246, 0.35);
      box-shadow: 0 4px 12px rgba(139, 92, 246, 0.12);
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--neon-purple);
      margin-bottom: 24px;
    }
    .hero-badge .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--neon-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-cyan);
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: var(--grad-neon);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      max-width: 860px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-btn-main {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      background: var(--grad-neon);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(6, 182, 212, 0.35);
    }
    .hero-btn-main:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(236, 72, 153, 0.45);
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1040px;
      margin: 0 auto;
    }
    .stat-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--grad-neon);
      opacity: 0;
      transition: opacity 0.3s;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(6, 182, 212, 0.4);
    }
    .stat-card:hover::before {
      opacity: 1;
    }
    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .stat-number .unit {
      font-size: 0.95rem;
      color: var(--neon-purple);
      margin-left: 2px;
    }
    .stat-label {
      font-size: 0.88rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 平台矩阵跑马灯标签 */
    .models-marquee-wrap {
      background: var(--bg-secondary);
      padding: 24px 0;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .marquee-title {
      text-align: center;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-light);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }
    .marquee-tags {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
      max-width: 1180px;
      margin: 0 auto;
    }
    .model-chip {
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.84rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }
    .model-chip:hover {
      background: #ffffff;
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 2px 8px rgba(6, 182, 212, 0.15);
      transform: translateY(-1px);
    }

    /* 网格卡片与通用卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(139, 92, 246, 0.35);
    }
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: rgba(6, 182, 212, 0.1);
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 20px;
    }
    .feature-icon-box.pink {
      background: rgba(236, 72, 153, 0.1);
      color: var(--neon-pink);
    }
    .feature-icon-box.purple {
      background: rgba(139, 92, 246, 0.1);
      color: var(--neon-purple);
    }
    .feature-icon-box.amber {
      background: rgba(245, 158, 11, 0.1);
      color: var(--neon-amber);
    }
    .feature-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .feature-text {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }
    .feature-tag-item {
      font-size: 0.78rem;
      padding: 3px 10px;
      background: var(--bg-subtle);
      border-radius: var(--radius-sm);
      color: var(--text-light);
      font-weight: 500;
    }

    /* 场景分类标签与卡片组 */
    .scene-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .scene-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 20px rgba(6, 182, 212, 0.12);
      transform: translateY(-3px);
    }
    .scene-title {
      font-size: 1.08rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .scene-badge {
      font-size: 0.72rem;
      padding: 2px 8px;
      background: rgba(6, 182, 212, 0.12);
      color: #0891b2;
      border-radius: var(--radius-full);
      font-weight: 600;
    }
    .scene-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 图片与媒体展示模块 */
    .media-card-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }
    .media-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: var(--bg-secondary);
    }
    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-box:hover img {
      transform: scale(1.02);
    }
    .media-caption {
      padding: 16px 20px;
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
      background: #ffffff;
      border-top: 1px solid var(--border-color);
    }

    /* 对比评测表格与卡片 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-block {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .score-circle {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: var(--grad-neon);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      box-shadow: 0 6px 20px rgba(139, 92, 246, 0.35);
    }
    .score-circle .num {
      font-size: 1.6rem;
      line-height: 1;
    }
    .score-circle .max {
      font-size: 0.72rem;
      opacity: 0.9;
    }
    .eval-info h3 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .table-container {
      overflow-x: auto;
      background: var(--bg-secondary);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }
    .compare-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table th.highlight-col,
    .compare-table td.highlight-col {
      background: rgba(6, 182, 212, 0.04);
      font-weight: 600;
      color: var(--neon-cyan);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-num {
      position: absolute;
      top: -14px;
      left: 20px;
      background: var(--grad-neon);
      color: #ffffff;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
      box-shadow: 0 4px 10px rgba(6, 182, 212, 0.3);
    }
    .step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-top: 10px;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 用户评论 */
    .review-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(6, 182, 212, 0.4);
    }
    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 0.9rem;
    }
    .review-content {
      font-size: 0.94rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: normal;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .avatar-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--grad-neon);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .author-name {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--neon-cyan);
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.08);
    }
    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--text-main);
      user-select: none;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--neon-cyan);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 500px;
      padding-bottom: 20px;
    }

    /* 表单与需求匹配 */
    .form-box {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: var(--bg-primary);
      color: var(--text-main);
      font-size: 0.95rem;
      outline: none;
      transition: all 0.25s ease;
    }
    .form-control:focus {
      border-color: var(--neon-cyan);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 联系与客服区 */
    .contact-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 20px 0;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .contact-info-item strong {
      color: var(--text-main);
      min-width: 90px;
    }
    .qr-block {
      display: flex;
      align-items: center;
      gap: 18px;
      padding: 16px;
      background: var(--bg-subtle);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      margin-top: 14px;
    }
    .qr-block img {
      width: 84px;
      height: 84px;
      border-radius: var(--radius-sm);
      object-fit: cover;
      background: #ffffff;
      padding: 4px;
      border: 1px solid var(--border-color);
    }
    .qr-text h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .qr-text p {
      font-size: 0.82rem;
      color: var(--text-light);
      line-height: 1.4;
    }

    /* 资讯与文章列表 */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .article-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.88rem;
      color: var(--text-muted);
      transition: all 0.25s ease;
    }
    .article-pill:hover {
      border-color: var(--neon-purple);
      color: var(--neon-purple);
      background: rgba(139, 92, 246, 0.05);
      transform: translateY(-2px);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.7;
      margin-top: 12px;
      color: var(--text-light);
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links li a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-links li a:hover {
      color: var(--neon-cyan);
    }
    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friend-links-box a {
      font-size: 0.85rem;
      color: var(--text-light);
      padding: 4px 10px;
      background: var(--bg-subtle);
      border-radius: var(--radius-sm);
    }
    .friend-links-box a:hover {
      color: var(--neon-cyan);
      background: rgba(6, 182, 212, 0.08);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 悬浮工具与回到顶部 */
    .floating-tools {
      position: fixed;
      bottom: 30px;
      right: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.1rem;
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: var(--grad-neon);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .grid-4, .hero-stats-grid, .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .media-card-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .site-header { position: static; }
      .mobile-toggle { display: block; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-lg);
      }
      .nav-menu.show { display: block; }
      .nav-links { flex-direction: column; align-items: flex-start; }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 10px 0; }
      .nav-actions { display: none; }
      .hero-title { font-size: 1.85rem; }
      .section-title { font-size: 1.7rem; }
      .grid-4, .grid-3, .grid-2, .hero-stats-grid, .steps-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .eval-highlight-box { flex-direction: column; text-align: center; }
      .eval-score-block { flex-direction: column; }
    }