/* roulang page: index */
:root {
      --brand-gradient: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #312E81 100%);
      --accent-gradient: linear-gradient(135deg, #D97706 0%, #F59E0B 100%);
      --accent-gold: #F59E0B;
      --accent-gold-dark: #B45309;
      --bg-dark: #090D16;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-light: #F1F5F9;
      --border-color: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.1);
      --card-radius: 20px;
      --badge-radius: 9999px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    /* 顶部服务栏与主导航 */
    .top-bar {
      background: #0B1120;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      background: var(--brand-gradient);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #F59E0B;
      font-size: 20px;
      font-weight: bold;
      border: 1px solid rgba(245, 158, 11, 0.4);
    }
    .logo-text {
      font-size: 19px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .logo-text span {
      color: var(--accent-gold-dark);
      font-weight: 600;
      font-size: 14px;
      display: block;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-gold-dark);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-gold);
      border-radius: 2px;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--badge-radius);
      cursor: pointer;
      border: none;
      transition: all 0.3s ease;
      min-height: 44px;
    }
    .btn-gold {
      background: var(--accent-gradient);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
    }
    .btn-gold:hover {
      box-shadow: 0 6px 20px rgba(217, 119, 6, 0.5);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.1);
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.3);
      backdrop-filter: blur(4px);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.2);
      border-color: #FFFFFF;
    }
    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }
    .btn-secondary:hover {
      background: #F1F5F9;
      color: var(--accent-gold-dark);
    }

    /* 徽章规范 */
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      font-size: 12px;
      font-weight: 700;
      border-radius: var(--badge-radius);
      background: rgba(245, 158, 11, 0.12);
      border: 1px solid rgba(245, 158, 11, 0.35);
      color: var(--accent-gold-dark);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .data-badge.badge-indigo {
      background: rgba(67, 56, 202, 0.1);
      border-color: rgba(67, 56, 202, 0.3);
      color: #4338CA;
    }
    .data-badge.badge-green {
      background: rgba(16, 185, 129, 0.12);
      border-color: rgba(16, 185, 129, 0.3);
      color: #047857;
    }

    /* 通用 Section 样式 */
    .site-section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-white);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }
    .section-header .section-subtitle {
      font-size: 15px;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 12px;
      display: block;
      letter-spacing: 1px;
    }
    .section-header h2 {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-dark .section-header h2 {
      color: #FFFFFF;
    }
    .section-header p {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-header p {
      color: #94A3B8;
    }

    /* 1. Hero 视频官网与全宽视觉区 */
    .hero-section {
      position: relative;
      background: var(--brand-gradient);
      color: #FFFFFF;
      padding: 120px 0 110px 0;
      overflow: hidden;
      clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
    }
    .hero-bg-cover {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.18;
      mix-blend-mode: overlay;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      margin: 20px 0;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 17px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }
    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 13px;
      color: #94A3B8;
    }
    .hero-trust-bar span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .hero-media-box {
      position: relative;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--card-radius);
      padding: 12px;
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(10px);
    }
    .hero-media-img {
      border-radius: 14px;
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .hero-video-play-btn {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 72px;
      height: 72px;
      background: var(--accent-gradient);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 26px;
      box-shadow: 0 0 28px rgba(245, 158, 11, 0.6);
      cursor: pointer;
      transition: transform 0.2s ease;
    }
    .hero-video-play-btn:hover {
      transform: translate(-50%, -50%) scale(1.08);
    }
    .hero-float-metric {
      position: absolute;
      bottom: -18px;
      left: 30px;
      background: #0B1120;
      border: 1px solid rgba(245, 158, 11, 0.4);
      padding: 12px 20px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      gap: 14px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    }

    /* 2. 实时算力与倒计时响应看板 */
    .countdown-bar-section {
      background: #FFFFFF;
      padding: 30px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .countdown-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .countdown-info h3 {
      font-size: 17px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .countdown-info p {
      font-size: 14px;
      color: var(--text-muted);
    }
    .countdown-boxes {
      display: flex;
      gap: 12px;
    }
    .timer-unit {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 10px 18px;
      text-align: center;
      min-width: 70px;
    }
    .timer-val {
      font-size: 22px;
      font-weight: 800;
      color: var(--accent-gold-dark);
      display: block;
      line-height: 1.1;
    }
    .timer-label {
      font-size: 11px;
      color: var(--text-muted);
      font-weight: 600;
      text-transform: uppercase;
    }

    /* 3. 架构介绍与技术参数 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .arch-image-wrap {
      position: relative;
    }
    .arch-image-wrap img {
      border-radius: var(--card-radius);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .tech-spec-badge {
      position: absolute;
      top: 24px;
      right: 24px;
      background: rgba(15, 23, 42, 0.9);
      color: #FFFFFF;
      padding: 14px 20px;
      border-radius: 14px;
      border: 1px solid rgba(245, 158, 11, 0.4);
      font-size: 13px;
      line-height: 1.5;
    }
    .arch-content h3 {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.35;
    }
    .arch-spec-list {
      margin: 28px 0;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: var(--bg-light);
      padding: 14px 18px;
      border-radius: 12px;
      border-left: 4px solid var(--accent-gold);
    }
    .spec-item strong {
      font-size: 15px;
      color: var(--text-main);
      min-width: 140px;
    }
    .spec-item span {
      font-size: 14px;
      color: var(--text-body);
    }

    /* 4. 核心功能分组与能力矩阵 (3x2 网格) */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
      border-color: rgba(245, 158, 11, 0.4);
    }
    .feature-header {
      margin-bottom: 16px;
    }
    .feature-icon-wrapper {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--accent-gold-dark);
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .feature-footer {
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 5. 热门数据分析产品矩阵 (3 列横向对比) */
    .tier-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      align-items: stretch;
    }
    .tier-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 40px 32px;
      box-shadow: var(--shadow-sm);
      position: relative;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .tier-card.featured {
      border: 2px solid var(--accent-gold);
      box-shadow: 0 14px 30px rgba(217, 119, 6, 0.15);
      transform: scale(1.03);
      z-index: 2;
    }
    .tier-badge-top {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-gradient);
      color: #FFFFFF;
      padding: 4px 16px;
      font-size: 12px;
      font-weight: 700;
      border-radius: var(--badge-radius);
    }
    .tier-name {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .tier-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 44px;
    }
    .tier-price-box {
      margin-bottom: 28px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .tier-price {
      font-size: 36px;
      font-weight: 900;
      color: var(--text-main);
    }
    .tier-price span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .tier-features {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .tier-features li {
      font-size: 14px;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tier-features li::before {
      content: '✓';
      color: #10B981;
      font-weight: bold;
    }

    /* 6. 拟态客户端看板演示区 */
    .dashboard-demo-wrap {
      background: #0B1120;
      border-radius: var(--card-radius);
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 24px;
      box-shadow: var(--shadow-lg);
    }
    .dash-window-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      margin-bottom: 20px;
    }
    .dash-dots {
      display: flex;
      gap: 8px;
    }
    .dash-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
    }
    .dash-tabs {
      display: flex;
      gap: 12px;
    }
    .dash-tab {
      background: rgba(255, 255, 255, 0.06);
      color: #94A3B8;
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 6px 16px;
      font-size: 13px;
      border-radius: 8px;
      cursor: pointer;
    }
    .dash-tab.active {
      background: rgba(245, 158, 11, 0.15);
      border-color: rgba(245, 158, 11, 0.4);
      color: var(--accent-gold);
      font-weight: 600;
    }
    .dash-main-screen {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
    }
    .dash-main-screen img {
      width: 100%;
      height: 480px;
      object-fit: cover;
    }
    .dash-overlay-tag {
      position: absolute;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 10px 16px;
      border-radius: 10px;
      font-size: 13px;
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(0,0,0,0.4);
    }
    .tag-pos-1 { top: 30px; left: 30px; }
    .tag-pos-2 { bottom: 40px; right: 40px; }

    /* 7. 深色对比理念区 */
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .quote-box {
      border-left: 4px solid var(--accent-gold);
      padding-left: 24px;
      margin-bottom: 28px;
    }
    .quote-box h3 {
      font-size: 26px;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.4;
      margin-bottom: 12px;
    }
    .quote-box p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.7;
    }

    /* 8. 4列业务流程横向时间轴 */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .timeline-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 30px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .timeline-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(245, 158, 11, 0.4);
    }
    .timeline-step {
      font-size: 32px;
      font-weight: 900;
      color: rgba(217, 119, 6, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .timeline-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .timeline-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 真实客户用户故事区 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .story-quote-mark {
      font-size: 48px;
      line-height: 1;
      color: var(--accent-gold);
      font-family: Georgia, serif;
      margin-bottom: 12px;
    }
    .story-content {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .story-author {
      display: flex;
      align-items: center;
      gap: 16px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }
    .story-avatar {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      object-fit: cover;
      border: 2px solid var(--accent-gold);
    }
    .story-meta h5 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
    }
    .story-meta span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 10. 关键成效量化统计条 */
    .metric-band {
      background: var(--brand-gradient);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 0 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-num {
      font-size: 42px;
      font-weight: 900;
      color: var(--accent-gold);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }
    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: #F1F5F9;
      margin-bottom: 4px;
    }
    .metric-desc {
      font-size: 12px;
      color: #94A3B8;
    }

    /* 11. 多行业客户口碑墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .stars {
      color: var(--accent-gold);
      font-size: 16px;
      margin-bottom: 12px;
      letter-spacing: 2px;
    }
    .testimonial-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .testimonial-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    /* 12. 贵宾服务数据智能研究动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .news-thumb {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
      font-size: 12px;
      color: var(--text-muted);
    }
    .news-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 10px;
    }
    .news-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--accent-gold-dark);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 13. 高频咨询 FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      transition: border-color 0.25s ease;
    }
    .faq-item[open] {
      border-color: rgba(245, 158, 11, 0.5);
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: '+';
      font-size: 22px;
      font-weight: 400;
      color: var(--accent-gold-dark);
      transition: transform 0.2s ease;
    }
    .faq-item[open] .faq-summary::after {
      content: '−';
    }
    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.75;
      border-top: 1px solid var(--border-color);
      margin-top: -6px;
      padding-top: 16px;
    }

    /* 底部行动号召转化区 */
    .cta-aggregate-card {
      background: var(--brand-gradient);
      border-radius: 24px;
      padding: 60px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .cta-text h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-text p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-assurances {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
      color: #94A3B8;
    }
    .cta-assurances span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .cta-form-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      border-radius: 16px;
      padding: 30px;
      backdrop-filter: blur(10px);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      color: #E2E8F0;
      margin-bottom: 6px;
      font-weight: 500;
    }
    .form-control {
      width: 100%;
      height: 44px;
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 8px;
      padding: 0 14px;
      font-size: 14px;
      color: #FFFFFF;
      outline: none;
      transition: border-color 0.25s ease;
    }
    .form-control:focus {
      border-color: var(--accent-gold);
    }
    select.form-control {
      color-scheme: dark;
    }

    /* 复合页脚 */
    .site-footer {
      background: #060911;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #F1F5F9;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-col ul li a {
      font-size: 13px;
      color: #94A3B8;
    }
    .footer-col ul li a:hover {
      color: var(--accent-gold);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 26px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .cards-grid-3, .tier-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tier-card.featured {
        transform: none;
      }
      .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item {
        border-right: none;
        margin-bottom: 20px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar-inner {
        flex-direction: column;
        gap: 6px;
        text-align: center;
      }
      .main-nav {
        display: none;
      }
      .hero-grid, .arch-grid, .philosophy-grid, .story-grid, .cta-aggregate-card {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .hero-section {
        padding: 80px 0 60px 0;
        clip-path: none;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .cards-grid-3, .tier-grid, .timeline-grid, .testimonial-grid, .news-grid, .metric-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-header h2 {
        font-size: 26px;
      }
      .cta-aggregate-card {
        padding: 36px 20px;
      }
      .dash-main-screen img {
        height: 260px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }