/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-hover: #059669;
      --secondary: #0F172A;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0B1120;
      --bg-dark-card: #1E293B;
      --text-dark: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 6px 16px -2px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 16px 32px -4px rgba(0, 0, 0, 0.1);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-w: 1200px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    ul, ol {
      list-style: none;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Topbar */
    .topbar {
      background: #020617;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid #1E293B;
      padding: 6px 0;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-tag {
      color: var(--primary);
      font-weight: 500;
    }
    .topbar-info span {
      margin-left: 16px;
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--secondary);
      letter-spacing: -0.02em;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), #059669);
      color: #fff;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .main-nav ul {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .main-nav a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 4px;
      position: relative;
    }
    .main-nav a:hover,
    .main-nav a.active {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
    }
    .btn-outline-dark {
      border-color: #334155;
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-outline-dark:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #64748B;
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.1);
    }
    .btn-outline-white:hover {
      background: #FFFFFF;
      color: var(--secondary);
    }

    /* Section Global Styles */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(16, 185, 129, 0.1);
      padding: 5px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: clamp(1.8rem, 3vw, 2.4rem);
      font-weight: 800;
      color: var(--secondary);
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero: 深色信息面板 + 左入口 + 右 faux 榜单 */
    #hero {
      background: linear-gradient(135deg, #090E17 0%, #0F172A 60%, #06231A 100%);
      color: #FFFFFF;
      padding: 70px 0 90px 0;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid #1E293B;
    }
    #hero::before {
      content: "";
      position: absolute;
      top: -100px;
      right: -100px;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, rgba(16, 185, 129, 0) 70%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(16, 185, 129, 0.15);
      border: 1px solid rgba(16, 185, 129, 0.35);
      color: #34D399;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-content h1 {
      font-size: clamp(2.1rem, 3.6vw, 3.2rem);
      line-height: 1.2;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 34px;
    }
    .hero-quick-data {
      display: flex;
      gap: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
    }
    .data-pill-num {
      font-size: 1.4rem;
      font-weight: 700;
      color: #FFFFFF;
    }
    .data-pill-label {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 右侧 faux 数据榜单面板 */
    .hero-leaderboard-panel {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
      backdrop-filter: blur(12px);
    }
    .leaderboard-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .leaderboard-title {
      font-size: 1rem;
      font-weight: 700;
      color: #F8FAFC;
    }
    .leaderboard-live {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      color: var(--accent);
      background: rgba(249, 115, 22, 0.15);
      padding: 3px 8px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }
    .live-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
    }
    .leaderboard-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .leaderboard-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(15, 23, 42, 0.6);
      padding: 12px 14px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.05);
      transition: var(--transition);
    }
    .leaderboard-item:hover {
      border-color: rgba(16, 185, 129, 0.4);
      transform: translateX(4px);
    }
    .coach-profile {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .coach-rank {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      width: 20px;
    }
    .coach-avatar-init {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: #334155;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 700;
      color: #E2E8F0;
    }
    .coach-meta-name {
      font-size: 0.875rem;
      font-weight: 600;
      color: #FFFFFF;
    }
    .coach-meta-spec {
      font-size: 0.75rem;
      color: var(--text-light);
    }
    .coach-stat-score {
      text-align: right;
    }
    .stat-val {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--primary);
    }
    .stat-desc {
      font-size: 0.725rem;
      color: var(--text-light);
    }

    /* 2. 倒计时与开通权益条 */
    #countdown-bar {
      background: linear-gradient(90deg, #1E293B, #0F172A);
      color: #FFFFFF;
      padding: 24px 0;
      border-bottom: 1px solid #334155;
    }
    .countdown-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .countdown-text-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .countdown-badge {
      background: var(--accent);
      color: #FFFFFF;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
    }
    .countdown-title {
      font-size: 1.05rem;
      font-weight: 700;
    }
    .countdown-subtitle {
      font-size: 0.875rem;
      color: #94A3B8;
    }
    .timer-boxes {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .timer-unit {
      background: #020617;
      border: 1px solid #334155;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      text-align: center;
      min-width: 50px;
    }
    .timer-unit .t-num {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--primary);
      display: block;
      line-height: 1;
    }
    .timer-unit .t-txt {
      font-size: 0.68rem;
      color: #64748B;
      text-transform: uppercase;
    }
    .timer-colon {
      font-weight: 700;
      color: #64748B;
    }

    /* 3. 产品架构与非对称图文介绍 (Intro) */
    #intro {
      background-color: #FFFFFF;
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .intro-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .intro-image-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .intro-image-wrap:hover img {
      transform: scale(1.03);
    }
    .intro-floating-spec {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .spec-item {
      display: flex;
      justify-content: space-between;
      font-size: 0.85rem;
      margin-bottom: 4px;
    }
    .spec-item:last-child {
      margin-bottom: 0;
    }
    .spec-val {
      color: var(--primary);
      font-weight: 700;
    }
    .intro-points {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .intro-point-item {
      display: flex;
      gap: 14px;
    }
    .point-icon {
      flex-shrink: 0;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .point-body h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--secondary);
    }
    .point-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 核心优势矩阵 (6宫格卡片) */
    #core-advantages {
      background-color: var(--bg-main);
    }
    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .advantage-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .advantage-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(16, 185, 129, 0.3);
    }
    .card-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }
    .card-icon-box {
      width: 48px;
      height: 48px;
      background: #F1F5F9;
      color: var(--secondary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
      transition: var(--transition);
    }
    .advantage-card:hover .card-icon-box {
      background: var(--primary);
      color: #FFFFFF;
    }
    .card-tag {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: var(--radius-full);
      background: #F1F5F9;
      color: var(--text-muted);
    }
    .advantage-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--secondary);
    }
    .advantage-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .card-metric-footer {
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* 5. 热门解决方案 (3纵列) */
    #featured-solutions {
      background-color: #FFFFFF;
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .sol-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      position: relative;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .sol-card.featured-card {
      border: 2px solid var(--primary);
      box-shadow: 0 12px 30px -4px rgba(16, 185, 129, 0.2);
      transform: translateY(-8px);
    }
    .sol-card:hover {
      box-shadow: var(--shadow-lg);
    }
    .badge-pop {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      text-transform: uppercase;
    }
    .sol-head {
      margin-bottom: 24px;
      text-align: center;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .sol-role {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 6px;
    }
    .sol-fit {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .sol-features {
      margin-bottom: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .sol-feat-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .sol-check {
      color: var(--primary);
      font-weight: 800;
      font-size: 0.95rem;
    }
    .sol-footer {
      margin-top: auto;
    }

    /* 6. 教学理念深色区 (Philosophy Dark) */
    #philosophy-dark {
      background: var(--bg-dark);
      color: #FFFFFF;
      border-top: 1px solid #1E293B;
      border-bottom: 1px solid #1E293B;
    }
    #philosophy-dark .section-title {
      color: #FFFFFF;
    }
    #philosophy-dark .section-desc {
      color: #94A3B8;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .dark-card-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 32px;
      margin-bottom: 20px;
    }
    .dark-card-box:last-child {
      margin-bottom: 0;
    }
    .dark-card-box h3 {
      font-size: 1.15rem;
      color: #FFFFFF;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .dark-card-box h3 span {
      color: var(--primary);
    }
    .dark-card-box p {
      font-size: 0.9rem;
      color: #94A3B8;
      line-height: 1.7;
    }
    .philosophy-image-container {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .philosophy-image-container img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }

    /* 7. 教练排课与带教工作流 (Workflow) */
    #workflow {
      background-color: var(--bg-main);
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
      margin-top: 20px;
    }
    .flow-steps::before {
      content: "";
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: #CBD5E1;
      z-index: 1;
    }
    .step-item {
      position: relative;
      z-index: 2;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      transition: var(--transition);
    }
    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .step-badge {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--secondary);
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 800;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      border: 4px solid var(--bg-main);
      box-shadow: var(--shadow-sm);
    }
    .step-item:hover .step-badge {
      background: var(--primary);
    }
    .step-item h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--secondary);
    }
    .step-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 8. 核心指标与运营表现条 (Metric Bar) */
    #metrics {
      background: #020617;
      color: #FFFFFF;
      padding: 60px 0;
      border-bottom: 1px solid #1E293B;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-card {
      padding: 16px;
    }
    .metric-value {
      font-size: clamp(2rem, 3.2vw, 2.8rem);
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -0.02em;
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: #F1F5F9;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: #64748B;
    }

    /* 9. 双列带教成果对照 (Stories) */
    #stories {
      background-color: #FFFFFF;
    }
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 30px;
    }
    .compare-panel {
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      border: 1px solid var(--border-color);
    }
    .compare-panel.panel-old {
      background: #F8FAFC;
    }
    .compare-panel.panel-new {
      background: linear-gradient(145deg, #F0FDF4 0%, #FFFFFF 100%);
      border: 2px solid #86EFAC;
      box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.15);
    }
    .compare-tag {
      font-size: 0.8rem;
      font-weight: 700;
      display: inline-block;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 16px;
    }
    .panel-old .compare-tag {
      background: #E2E8F0;
      color: #475569;
    }
    .panel-new .compare-tag {
      background: #DCFCE7;
      color: #15803D;
    }
    .compare-title {
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 18px;
      color: var(--secondary);
    }
    .compare-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .compare-row {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      font-size: 0.92rem;
      line-height: 1.6;
    }
    .panel-old .compare-icon {
      color: #94A3B8;
      font-weight: 700;
    }
    .panel-new .compare-icon {
      color: var(--primary);
      font-weight: 800;
    }

    /* 10. 教练评价流 (Testimonials) */
    #testimonials {
      background-color: var(--bg-main);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 0.95rem;
      margin-bottom: 14px;
    }
    .testi-quote {
      font-size: 0.92rem;
      color: var(--text-dark);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .user-avatar-text {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }
    .user-meta-name {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--secondary);
    }
    .user-meta-role {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* 11. 数字化资讯 (News) */
    #news {
      background-color: #FFFFFF;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #FFFFFF;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-thumb {
      height: 200px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 0.78rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.45;
      color: var(--secondary);
    }
    .news-summary {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. 常见问题解答 (FAQ) */
    #faq {
      background-color: var(--bg-main);
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--secondary);
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-body {
      padding: 0 24px 20px 24px;
      display: none;
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      display: block;
    }

    /* 13. 底部转化收口行动区 (Bottom CTA) */
    #bottom-cta {
      background: linear-gradient(135deg, #0F172A 0%, #064E3B 100%);
      color: #FFFFFF;
      padding: 90px 0;
      text-align: center;
      position: relative;
    }
    .cta-inner {
      max-width: 780px;
      margin: 0 auto;
    }
    .cta-inner h2 {
      font-size: clamp(2rem, 3.4vw, 2.8rem);
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.25;
    }
    .cta-inner p {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 34px;
    }
    .cta-btn-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }

    /* Footer */
    .site-footer {
      background: #020617;
      color: #94A3B8;
      padding: 70px 0 24px 0;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      font-size: 0.85rem;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
      letter-spacing: 0.02em;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 12px;
    }
    .contact-title {
      font-size: 0.75rem;
      color: #64748B;
      text-transform: uppercase;
    }
    .contact-detail {
      color: #F1F5F9;
      font-weight: 500;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }
    .footer-legal-links {
      display: flex;
      gap: 20px;
    }
    .footer-legal-links a:hover {
      color: var(--primary);
    }

    /* 移动端汉堡菜单 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--secondary);
      cursor: pointer;
      padding: 6px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-6 {
        grid-template-columns: repeat(2, 1fr);
      }
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      .sol-card.featured-card {
        transform: none;
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps::before {
        display: none;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
        padding: 20px 24px;
      }
      .main-nav.open {
        display: block;
      }
      .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
      }
      .main-nav a {
        width: 100%;
        display: block;
        padding: 8px 0;
      }
      .hero-grid,
      .intro-grid,
      .philosophy-grid,
      .compare-container {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .grid-6,
      .testimonials-grid,
      .news-grid,
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .countdown-flex {
        flex-direction: column;
        text-align: center;
        justify-content: center;
      }
      .countdown-text-group {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }