/* roulang page: index */
:root {
      --primary: #4B0082;
      --primary-light: #6a11cb;
      --accent: #00F2FE;
      --cta: #FF4500;
      --cta-hover: #ff5722;
      --bg: #0A0B10;
      --bg-surface: #12141d;
      --bg-card: rgba(26, 28, 36, 0.72);
      --border: rgba(0, 242, 254, 0.16);
      --border-light: rgba(255, 255, 255, 0.08);
      --text: #F3F4F6;
      --text-muted: #9CA3AF;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --glow: 0 0 20px rgba(0, 242, 254, 0.25);
      --transition: all 0.28s ease-in-out;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(75, 0, 130, 0.35) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(0, 242, 254, 0.15) 0%, transparent 45%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-md);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 头部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 11, 16, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
    }

    .brand-logo span.dot {
      width: 10px;
      height: 10px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-links a {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--accent);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }

    .btn-cta {
      background: var(--cta);
      color: #fff;
      box-shadow: 0 4px 14px rgba(255, 69, 0, 0.35);
    }

    .btn-cta:hover {
      background: var(--cta-hover);
      box-shadow: 0 0 16px rgba(255, 69, 0, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--accent);
      color: var(--accent);
    }

    .btn-outline:hover {
      background: rgba(0, 242, 254, 0.1);
      box-shadow: var(--glow);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-darker {
      background: rgba(14, 16, 24, 0.6);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent);
      margin-bottom: 12px;
      background: rgba(0, 242, 254, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      border: 1px solid rgba(0, 242, 254, 0.2);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 800px;
      line-height: 1.7;
    }

    /* Hero 大屏（蓝图：自测选型短问卷视觉，结果预览位 + 开始测评） */
    .hero-section {
      padding: 70px 0 90px;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(75, 0, 130, 0.25) 0%, rgba(10, 11, 16, 0.8) 100%),
                  url('/assets/images/东城积极探索人工智能体育教育发展新路径_运动_数据_测试项目.webp') center/cover no-repeat;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.9rem;
      font-weight: 800;
      line-height: 1.22;
      color: #fff;
      margin-bottom: 20px;
    }

    .hero-content h1 span {
      background: linear-gradient(90deg, #00F2FE 0%, #a855f7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.05rem;
      color: #D1D5DB;
      margin-bottom: 30px;
      line-height: 1.8;
    }

    .hero-badge-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 32px;
    }

    .hero-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.88rem;
      color: #E5E7EB;
      background: rgba(255, 255, 255, 0.06);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }

    /* 问卷评估交互卡 */
    .quiz-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    }

    .quiz-step-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .quiz-progress {
      height: 6px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 24px;
    }

    .quiz-progress-bar {
      width: 65%;
      height: 100%;
      background: linear-gradient(90deg, var(--accent), var(--cta));
    }

    .quiz-question-group {
      margin-bottom: 20px;
    }

    .quiz-label {
      display: block;
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .quiz-select {
      width: 100%;
      background: rgba(10, 11, 16, 0.9);
      border: 1px solid var(--border-light);
      color: #fff;
      padding: 12px;
      border-radius: var(--radius-sm);
      outline: none;
      font-size: 0.92rem;
    }

    .quiz-preview-box {
      background: rgba(0, 242, 254, 0.05);
      border: 1px dashed var(--accent);
      border-radius: var(--radius-sm);
      padding: 14px;
      margin-bottom: 20px;
    }

    .quiz-preview-label {
      font-size: 0.75rem;
      text-transform: uppercase;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 4px;
    }

    .quiz-preview-text {
      font-size: 0.9rem;
      color: #F3F4F6;
    }

    /* 2. 核心指标看板 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      overflow: hidden;
    }

    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent);
    }

    .metric-card:nth-child(2)::before { background: #a855f7; }
    .metric-card:nth-child(3)::before { background: var(--cta); }
    .metric-card:nth-child(4)::before { background: #10B981; }

    .metric-value {
      font-size: 2.3rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-title {
      font-size: 1rem;
      color: #fff;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .metric-note {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 3. 服务亮点矩阵 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      border-color: var(--border);
      box-shadow: var(--glow);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 242, 254, 0.1);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: 800;
    }

    .feature-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 4. 时段流转卡（排班/处理调度机制） */
    .schedule-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .schedule-card {
      background: rgba(22, 25, 35, 0.8);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .schedule-card.active {
      border-color: var(--accent);
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
    }

    .schedule-time {
      display: inline-block;
      font-size: 0.8rem;
      color: var(--accent);
      background: rgba(0, 242, 254, 0.12);
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 14px;
      font-weight: 600;
    }

    .schedule-card h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 8px;
    }

    .schedule-card p {
      font-size: 0.86rem;
      color: var(--text-muted);
      margin-bottom: 14px;
    }

    .schedule-status {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      color: #10B981;
    }

    .schedule-status span.dot {
      width: 6px;
      height: 6px;
      background: #10B981;
      border-radius: 50%;
    }

    /* 5. 结果对比板块 */
    .compare-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .compare-box {
      border-radius: var(--radius-md);
      padding: 36px;
      border: 1px solid var(--border-light);
    }

    .compare-traditional {
      background: rgba(26, 28, 36, 0.4);
    }

    .compare-smart {
      background: linear-gradient(145deg, rgba(75, 0, 130, 0.3) 0%, rgba(26, 28, 36, 0.8) 100%);
      border-color: var(--border);
      position: relative;
    }

    .compare-badge {
      display: inline-block;
      padding: 4px 10px;
      font-size: 0.8rem;
      border-radius: 4px;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .compare-traditional .compare-badge {
      background: rgba(255, 255, 255, 0.1);
      color: var(--text-muted);
    }

    .compare-smart .compare-badge {
      background: var(--accent);
      color: #000;
    }

    .compare-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }

    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .compare-list li {
      font-size: 0.92rem;
      color: #D1D5DB;
      position: relative;
      padding-left: 24px;
    }

    .compare-traditional .compare-list li::before {
      content: "✕";
      position: absolute;
      left: 0;
      color: #EF4444;
      font-weight: bold;
    }

    .compare-smart .compare-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--accent);
      font-weight: bold;
    }

    /* 6. 专家技术架构与团队板块 */
    .team-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .team-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      text-align: center;
      padding: 24px;
      transition: var(--transition);
    }

    .team-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    .team-avatar {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      margin: 0 auto 16px;
      background: linear-gradient(135deg, var(--primary-light), var(--accent));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.4rem;
      color: #fff;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    }

    .team-card h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 6px;
    }

    .team-card .role {
      font-size: 0.85rem;
      color: var(--accent);
      margin-bottom: 12px;
    }

    .team-card p {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 焦点主题分类矩阵 */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .category-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .category-card:hover {
      border-color: rgba(0, 242, 254, 0.4);
    }

    .category-card-img {
      height: 180px;
      overflow: hidden;
    }

    .category-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
      border-radius: 0;
    }

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

    .category-card-body {
      padding: 22px;
    }

    .category-card-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .category-card-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    /* 8. 裂变激励与生态协同体系（蓝图要求） */
    .fission-banner {
      background: linear-gradient(135deg, rgba(75, 0, 130, 0.5) 0%, rgba(18, 20, 29, 0.9) 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .fission-info h3 {
      font-size: 1.6rem;
      color: #fff;
      margin-bottom: 12px;
    }

    .fission-info p {
      font-size: 0.95rem;
      color: #D1D5DB;
      margin-bottom: 24px;
    }

    .fission-progress-wrap {
      margin-bottom: 20px;
    }

    .fission-progress-label {
      display: flex;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .progress-bar-bg {
      height: 10px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 6px;
      overflow: hidden;
    }

    .progress-bar-fill {
      width: 78%;
      height: 100%;
      background: linear-gradient(90deg, var(--accent), var(--cta));
    }

    .fission-rank-box {
      background: rgba(10, 11, 16, 0.7);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .fission-rank-box h4 {
      font-size: 1rem;
      color: #fff;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .rank-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
      font-size: 0.88rem;
    }

    .rank-item:last-child {
      border-bottom: none;
    }

    .rank-num {
      width: 22px;
      height: 22px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      margin-right: 8px;
    }

    .rank-num.top {
      background: var(--accent);
      color: #000;
      font-weight: 700;
    }

    /* 9. 发展历程时间线 */
    .timeline-wrap {
      position: relative;
      padding: 20px 0;
    }

    .timeline-wrap::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: var(--border-light);
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      margin-bottom: 36px;
      width: 50%;
      padding-right: 40px;
    }

    .timeline-item:nth-child(even) {
      margin-left: 50%;
      padding-right: 0;
      padding-left: 40px;
    }

    .timeline-item::after {
      content: "";
      position: absolute;
      top: 10px;
      right: -6px;
      width: 14px;
      height: 14px;
      background: var(--accent);
      border: 3px solid var(--bg);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent);
    }

    .timeline-item:nth-child(even)::after {
      left: -8px;
      right: auto;
    }

    .timeline-box {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px 24px;
    }

    .timeline-box span.year {
      font-size: 0.82rem;
      color: var(--accent);
      font-weight: 700;
    }

    .timeline-box h4 {
      font-size: 1.1rem;
      color: #fff;
      margin: 6px 0;
    }

    .timeline-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 10. 套餐方案对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .pricing-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 34px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }

    .pricing-card.recommended {
      border-color: var(--accent);
      background: linear-gradient(180deg, rgba(75, 0, 130, 0.25) 0%, rgba(26, 28, 36, 0.9) 100%);
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.15);
      transform: scale(1.02);
    }

    .pricing-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--cta);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 12px;
      border-radius: 20px;
      font-weight: 700;
    }

    .pricing-name {
      font-size: 1.3rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .pricing-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .pricing-features {list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .pricing-features li {
      font-size: 0.9rem;
      color: #E5E7EB;
      position: relative;
      padding-left: 20px;
    }

    .pricing-features li::before {
      content: "•";
      color: var(--accent);
      position: absolute;
      left: 0;
      font-weight: 800;
    }

    /* 11. 客户故事与真实数据 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .story-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .story-quote {
      font-size: 1.05rem;
      color: #F3F4F6;
      line-height: 1.8;
      margin-bottom: 24px;
      position: relative;
    }

    .story-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 18px;
    }

    .story-author h4 {
      font-size: 1rem;
      color: #fff;
    }

    .story-author span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .story-stat {
      text-align: right;
    }

    .story-stat-num {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--accent);
    }

    .story-stat-label {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 12. 资质与安全体系 */
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .trust-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }

    .trust-icon {
      font-size: 1.8rem;
      color: var(--accent);
      margin-bottom: 12px;
    }

    .trust-card h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 6px;
    }

    .trust-card p {
      font-size: 0.84rem;
      color: var(--text-muted);
    }

    /* 13. 资讯与行业趋势 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-card-img {
      height: 170px;
      overflow: hidden;
    }

    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 0;
    }

    .news-body {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-excerpt {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 14. 常见问题 FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px 24px;
    }

    .faq-question {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .faq-question span.q-icon {
      color: var(--accent);
      font-size: 1.1rem;
      font-weight: bold;
    }

    .faq-answer {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 15. 落地转化与预约表单 */
    .form-wrap {
      background: linear-gradient(145deg, rgba(75, 0, 130, 0.4) 0%, rgba(18, 20, 29, 0.95) 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 44px;
      max-width: 920px;
      margin: 0 auto;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      color: #D1D5DB;
      margin-bottom: 8px;
    }

    .form-input, .form-textarea {
      width: 100%;
      background: rgba(10, 11, 16, 0.85);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      color: #fff;
      font-size: 0.92rem;
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus, .form-textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
    }

    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }

    /* 页脚 */
    footer.site-footer {
      background: #06070a;
      border-top: 1px solid var(--border-light);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 800;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 700;
    }

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

    .footer-links a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: #6B7280;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 36px; }
      .metric-grid, .schedule-grid, .team-grid, .trust-grid { grid-template-columns: repeat(2, 1fr); }
      .cards-grid-3, .category-grid, .pricing-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
      .fission-banner { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-content h1 { font-size: 2.2rem; }
      .section-title { font-size: 1.75rem; }
      .cards-grid-3, .category-grid, .pricing-grid, .news-grid, .compare-wrap, .story-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group-full { grid-column: span 1; }
      .timeline-wrap::before { left: 20px; }
      .timeline-item { width: 100%; padding-left: 50px; padding-right: 0; }
      .timeline-item:nth-child(even) { margin-left: 0; padding-left: 50px; }
      .timeline-item::after, .timeline-item:nth-child(even)::after { left: 14px; }
      .metric-grid, .schedule-grid, .team-grid, .trust-grid { grid-template-columns: 1fr; }
    }