/* roulang page: index */
:root {
      --primary: #10b981;
      --primary-dark: #047857;
      --primary-light: #d1fae5;
      --accent: #f59e0b;
      --accent-dark: #d97706;
      --night-bg: #0b132b;
      --night-surface: #1c2541;
      --night-card: #233152;
      --light-bg: #f8fafc;
      --white: #ffffff;
      --slate-50: #f8fafc;
      --slate-100: #f1f5f9;
      --slate-200: #e2e8f0;
      --slate-300: #cbd5e1;
      --slate-600: #475569;
      --slate-700: #334155;
      --slate-800: #1e293b;
      --slate-900: #0f172a;
      --font-stack: system-ui, -apple-system, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
      --radius-md: 8px;
      --radius-lg: 14px;
      --radius-xl: 20px;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--slate-800);
      background-color: var(--white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

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

    .container-wide {
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Top utility bar */
    .top-bar {
      background: var(--night-bg);
      color: var(--slate-300);
      font-size: 13px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(245, 158, 11, 0.2);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 9999px;
      font-weight: 600;
      font-size: 11px;
      letter-spacing: 0.5px;
    }

    .pulse-dot {
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    /* Main Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--slate-200);
      transition: all 0.3s ease;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--slate-900);
      letter-spacing: -0.5px;
    }

    .brand-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }

    .brand-text-sub {
      font-size: 11px;
      color: var(--primary-dark);
      letter-spacing: 1px;
      font-weight: 700;
      display: block;
      margin-top: -2px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 600;
      color: var(--slate-700);
      transition: color 0.2s ease;
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary-dark);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 8px;
      background: var(--primary-dark);
      color: #fff;
      box-shadow: 0 4px 12px rgba(4, 120, 87, 0.25);
      transition: all 0.25s ease;
    }

    .nav-cta:hover {
      background: #036246;
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(4, 120, 87, 0.35);
    }

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

    .nav-toggle span {
      width: 24px;
      height: 2px;
      background: var(--slate-800);
      border-radius: 2px;
      transition: all 0.3s;
    }

    /* Section Global Headers */
    .section-spacing {
      padding: 88px 0;
    }

    .section-spacing-sm {
      padding: 60px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px auto;
    }

    .section-kicker {
      display: inline-block;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(16, 185, 129, 0.12);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--slate-900);
      letter-spacing: -0.5px;
      line-height: 1.35;
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--slate-600);
      line-height: 1.8;
    }

    .text-light .section-title {
      color: var(--white);
    }

    .text-light .section-subtitle {
      color: var(--slate-300);
    }

    /* Hero Section: Blueprint Stage Center */
    .hero-section {
      background: radial-gradient(circle at 50% 30%, #152243 0%, var(--night-bg) 100%);
      color: var(--white);
      padding: 60px 0 90px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-decor-field {
      position: absolute;
      top: -20%;
      left: 50%;
      transform: translateX(-50%);
      width: 1200px;
      height: 600px;
      border: 1px dashed rgba(16, 185, 129, 0.15);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      border-radius: 30px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 13px;
      color: var(--primary-light);
      margin-bottom: 20px;
    }

    .hero-headline {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: var(--white);
    }

    .hero-headline span {
      background: linear-gradient(120deg, #34d399, #10b981);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 16px;
      color: #94a3b8;
      max-width: 820px;
      margin: 0 auto 32px auto;
      line-height: 1.8;
    }

    .hero-stage-layout {
      display: grid;
      grid-template-columns: 280px 1fr 280px;
      gap: 24px;
      align-items: center;
      margin-top: 40px;
    }

    .hero-side-card {
      background: rgba(28, 37, 65, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      text-align: left;
    }

    .hero-side-card h4 {
      font-size: 16px;
      color: var(--white);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hero-side-card p {
      font-size: 13px;
      color: #94a3b8;
      line-height: 1.6;
    }

    .stage-center-box {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 40px rgba(16, 185, 129, 0.2);
      border: 1px solid rgba(16, 185, 129, 0.3);
    }

    .stage-img-wrap {
      position: relative;
      height: 380px;
      overflow: hidden;
      background: #000;
    }

    .stage-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.9;
      transform: scale(1.02);
      transition: transform 0.6s ease;
    }

    .stage-center-box:hover .stage-img-wrap img {
      transform: scale(1.05);
    }

    .stage-overlay-hud {
      position: absolute;
      top: 16px;
      left: 16px;
      right: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      pointer-events: none;
    }

    .hud-tag {
      background: rgba(0, 0, 0, 0.65);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 12px;
      color: #34d399;
      font-family: monospace;
    }

    .stage-bottom-action {
      background: rgba(15, 23, 42, 0.92);
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .hero-btn-group {
      display: flex;
      gap: 12px;
      justify-content: center;
      margin-top: 28px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      background: var(--primary);
      border-radius: 8px;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
      border: none;
      cursor: pointer;
      transition: all 0.2s;
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 26px;
      font-size: 15px;
      font-weight: 700;
      color: var(--white);
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s;
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.16);
      transform: translateY(-2px);
    }

    /* Live Countdown Header strip (Blueprint: 直播预告/倒计时) */
    .live-broadcast-banner {
      background: linear-gradient(90deg, #064e3b, #047857, #065f46);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px 0;
      color: #fff;
      font-size: 14px;
    }

    .broadcast-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .broadcast-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .broadcast-pill {
      background: #ef4444;
      color: #fff;
      padding: 3px 10px;
      border-radius: 4px;
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.5px;
      animation: pulseAnim 2s infinite;
    }

    @keyframes pulseAnim {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.6; }
    }

    .countdown-boxes {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .c-box {
      background: rgba(0, 0, 0, 0.4);
      padding: 4px 8px;
      border-radius: 4px;
      font-weight: 700;
      font-size: 14px;
      min-width: 32px;
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* Plate 2: KPI 看板 (data-metrics) */
    .kpi-section {
      background: var(--slate-900);
      color: #fff;
      padding: 56px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .kpi-card {
      padding: 24px 20px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      transition: all 0.3s;
    }

    .kpi-card:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(16, 185, 129, 0.4);
      transform: translateY(-3px);
    }

    .kpi-num {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }

    .kpi-label {
      font-size: 15px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 6px;
    }

    .kpi-desc {
      font-size: 13px;
      color: var(--slate-300);
      line-height: 1.5;
    }

    /* Plate 3: 硬件与系统架构拆解 (#tech-intro) */
    .spec-table-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .spec-img-box {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--slate-200);
      box-shadow: var(--shadow-xl);
    }

    .spec-img-box img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }

    .spec-tag-floating {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(11, 19, 43, 0.88);
      color: #fff;
      padding: 10px 18px;
      border-radius: 8px;
      font-size: 13px;
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .spec-feature-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .spec-item {
      display: flex;
      gap: 16px;
      padding: 18px;
      background: var(--slate-50);
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      transition: border-color 0.2s;
    }

    .spec-item:hover {
      border-color: var(--primary);
      background: #f0fdf4;
    }

    .spec-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: #e6fcf5;
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      flex-shrink: 0;
    }

    .spec-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--slate-900);
      margin-bottom: 4px;
    }

    .spec-item p {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.6;
    }

    /* Plate 4: 核心优势网格 (#features) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--white);
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      padding: 32px 26px;
      transition: all 0.3s ease;
      position: relative;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 30px rgba(0, 0, 0, 0.08);
      border-color: var(--primary);
    }

    .card-top-icon {
      width: 52px;
      height: 52px;
      background: var(--slate-100);
      color: var(--primary-dark);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 900;
      margin-bottom: 20px;
      transition: all 0.3s;
    }

    .feature-card:hover .card-top-icon {
      background: var(--primary);
      color: #fff;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 800;
      color: var(--slate-900);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.65;
    }

    /* Plate 5: 服务矩阵与硬件终端矩阵 (#products) */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .product-card {
      background: var(--white);
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-xl);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .product-media {
      height: 220px;
      position: relative;
      background: var(--slate-100);
      overflow: hidden;
    }

    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .product-card:hover .product-media img {
      transform: scale(1.06);
    }

    .product-body {
      padding: 28px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .product-type {
      font-size: 12px;
      font-weight: 800;
      color: var(--primary-dark);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 6px;
    }

    .product-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--slate-900);
      margin-bottom: 12px;
    }

    .product-desc {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .product-specs-list {
      list-style: none;
      margin-bottom: 24px;
      border-top: 1px solid var(--slate-100);
      padding-top: 16px;
      flex: 1;
    }

    .product-specs-list li {
      font-size: 13px;
      color: var(--slate-700;
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .product-specs-list li::before {
      content: '✓';
      color: var(--primary);
      font-weight: 900;
    }

    .product-btn {
      display: block;
      width: 100%;
      text-align: center;
      padding: 12px 0;
      background: var(--slate-100);
      color: var(--slate-900);
      font-weight: 700;
      font-size: 14px;
      border-radius: 8px;
      border: 1px solid var(--slate-200);
      transition: all 0.2s;
    }

    .product-card:hover .product-btn {
      background: var(--primary-dark);
      color: #fff;
      border-color: var(--primary-dark);
    }

    /* Plate 6: 结果对比与传统转播差异 (结果对比) */
    .compare-section {
      background: #f1f5f9;
    }

    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-xl);
      border: 1px solid var(--slate-200);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .compare-header-row {
      display: grid;
      grid-template-columns: 2fr 3fr 3fr;
      background: var(--night-bg);
      color: #fff;
      padding: 20px 24px;
      font-weight: 800;
      font-size: 16px;
    }

    .compare-header-row .header-highlight {
      color: var(--primary);
    }

    .compare-row {
      display: grid;
      grid-template-columns: 2fr 3fr 3fr;
      padding: 18px 24px;
      border-bottom: 1px solid var(--slate-200);
      align-items: center;
      font-size: 14px;
    }

    .compare-row:last-child {
      border-bottom: none;
    }

    .compare-row:nth-child(even) {
      background: #f8fafc;
    }

    .compare-dim {
      font-weight: 700;
      color: var(--slate-900);
    }

    .compare-traditional {
      color: #64748b;
    }

    .compare-bozhi {
      color: var(--primary-dark);
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* Plate 7: 沉浸式战术看板与设计哲学 (#philosophy) */
    .philosophy-section {
      background: var(--night-bg);
      color: var(--white);
      position: relative;
    }

    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .dash-mockup-frame {
      background: var(--night-surface);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-xl);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }

    .dash-topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      margin-bottom: 16px;
    }

    .dash-status {
      font-size: 12px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .dash-screen-canvas {
      position: relative;
      height: 240px;
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 16px;
    }

    .dash-screen-canvas img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .dash-metrics-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .dash-mini-card {
      background: var(--night-card);
      padding: 12px;
      border-radius: 6px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .dash-mini-card span {
      font-size: 11px;
      color: #94a3b8;
      display: block;
    }

    .dash-mini-card strong {
      font-size: 16px;
      color: #fff;
      margin-top: 4px;
      display: block;
    }

    /* Plate 8: 场景演示与标杆用户故事 (#solutions) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-xl);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .scenario-thumb {
      height: 200px;
      overflow: hidden;
    }

    .scenario-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }

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

    .scenario-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .scenario-tag {
      display: inline-block;
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-dark);
      background: #ecfdf5;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .scenario-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--slate-900);
      margin-bottom: 10px;
    }

    .scenario-text {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .scenario-gain {
      background: var(--slate-50);
      padding: 12px 14px;
      border-radius: 6px;
      font-size: 13px;
      color: var(--slate-700);
      border-left: 3px solid var(--primary);
      margin-top: auto;
    }

    /* Plate 9: 体育科技演进里程碑 (里程碑时间线) */
    .timeline-wrap {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }

    .timeline-wrap::before {
      content: '';
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--slate-200);
    }

    .timeline-node {
      display: flex;
      justify-content: flex-end;
      padding-right: 30px;
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }

    .timeline-node.inverted {
      align-self: flex-end;
      margin-left: 50%;
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 30px;
    }

    .timeline-dot {
      position: absolute;
      right: -8px;
      top: 14px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #fff;
      box-shadow: 0 0 0 2px var(--primary);
      z-index: 2;
    }

    .timeline-node.inverted .timeline-dot {
      right: auto;
      left: -8px;
    }

    .timeline-box {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
      max-width: 380px;
    }

    .timeline-year {
      font-size: 13px;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: 0.5px;
      margin-bottom: 6px;
    }

    .timeline-heading {
      font-size: 16px;
      font-weight: 800;
      color: var(--slate-900);
      margin-bottom: 6px;
    }

    .timeline-desc {
      font-size: 13px;
      color: var(--slate-600);
      line-height: 1.6;
    }

    /* Plate 10: 权威教练与用户实名口碑 (#testimonials) */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testi-card {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      padding: 30px 26px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .testi-stars {
      color: #f59e0b;
      margin-bottom: 16px;
      font-size: 15px;
      letter-spacing: 2px;
    }

    .testi-quote {
      font-size: 14px;
      color: var(--slate-700);
      line-height: 1.7;
      margin-bottom: 24px;
      flex: 1;
      font-style: italic;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--slate-100);
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--slate-200);
      overflow: hidden;
    }

    .author-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .author-meta h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--slate-900);
    }

    .author-meta p {
      font-size: 12px;
      color: var(--slate-600);
    }

    /* Plate 11: 资讯与战术演练快讯 (#news-digest) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .news-card:hover {
      box-shadow: var(--shadow-md);
    }

    .news-thumb {
      height: 180px;
      overflow: hidden;
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

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

    .news-date {
      font-size: 12px;
      color: var(--slate-600);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 17px;
      font-weight: 800;
      color: var(--slate-900);
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--slate-600);
      line-height: 1.65;
      margin-bottom: 16px;
      flex: 1;
    }

    .news-anchor {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-dark);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Plate 12: 常见疑虑与技术 FAQ 手风琴 (#faq) */
    .faq-wrapper {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--slate-900);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.75;
      display: block;
    }

    /* Plate 13: 平台保障承诺条 (#guarantee) */
    .guarantee-band {
      background: linear-gradient(135deg, #0b132b 0%, #152243 100%);
      color: #fff;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .guarantee-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding: 16px;
      background: rgba(255, 255, 255, 0.03);
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .guarantee-badge {
      width: 44px;
      height: 44px;
      background: rgba(16, 185, 129, 0.15);
      border-radius: 8px;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 900;
      flex-shrink: 0;
    }

    .guarantee-text h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 4px;
    }

    .guarantee-text p {
      font-size: 12px;
      color: #94a3b8;
      line-height: 1.5;
    }

    /* Plate 14: 行动呼唤转化区块与预约实测 (#contact-cta) */
    .cta-card-box {
      background: linear-gradient(135deg, var(--primary-dark) 0%, #064e3b 100%);
      border-radius: var(--radius-xl);
      padding: 60px 48px;
      color: #fff;
      box-shadow: 0 20px 40px rgba(4, 120, 87, 0.3);
    }

    .cta-inner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .cta-info h2 {
      font-size: 32px;
      font-weight: 900;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .cta-info p {
      font-size: 15px;
      color: #d1fae5;
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .cta-bullets {
      list-style: none;
      font-size: 13px;
      color: #a7f3d0;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .cta-bullets li::before {
      content: '● ';
      color: var(--accent);
    }

    .cta-form {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-xl);
      color: var(--slate-900);
    }

    .cta-form h3 {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 18px;
      text-align: center;
    }

    .form-group {
      margin-bottom: 14px;
    }

    .form-group label {
      display: block;
      font-size: 12px;
      font-weight: 700;
      color: var(--slate-700);
      margin-bottom: 6px;
    }

    .form-group input, .form-group select {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--slate-300);
      border-radius: 6px;
      font-size: 14px;
      color: var(--slate-800);
      font-family: inherit;
    }

    .form-group input:focus, .form-group select:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .btn-submit {
      width: 100%;
      padding: 13px;
      background: var(--primary);
      color: #fff;
      font-size: 15px;
      font-weight: 800;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
      transition: background 0.2s;
    }

    .btn-submit:hover {
      background: var(--primary-dark);
    }

    .form-privacy-note {
      font-size: 11px;
      color: var(--slate-600);
      text-align: center;
      margin-top: 10px;
    }

    /* Footer */
    .site-footer {
      background: #080d1a;
      color: #94a3b8;
      padding: 64px 0 32px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

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

    .footer-col ul li a {
      color: #94a3b8;
      transition: color 0.2s;
    }

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

    .footer-desc {
      font-size: 13px;
      line-height: 1.7;
      margin-top: 14px;
      max-width: 320px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
    }

    .footer-icp {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* Mobile Sticky Conversion Bar */
    .sticky-mobile-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(11, 19, 43, 0.98);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding: 10px 16px;
      z-index: 999;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
    }

    .mobile-bar-inner {
      display: flex;
      gap: 10px;
      align-items: center;
    }

    .mobile-btn-call {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px;
      background: var(--night-card);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 6px;
      color: #fff;
      font-size: 13px;
      font-weight: 700;
    }

    .mobile-btn-quote {
      flex: 2;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 10px;
      background: var(--primary);
      border-radius: 6px;
      color: #fff;
      font-size: 13px;
      font-weight: 800;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-stage-layout {
        grid-template-columns: 1fr;
      }
      .hero-side-card {
        display: none;
      }
      .spec-table-grid, .philosophy-grid, .cta-inner-grid {
        grid-template-columns: 1fr;
      }
      .kpi-grid, .features-grid, .product-grid, .scenario-grid, .testi-grid, .news-grid, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      body {
        padding-bottom: 60px;
      }
      .top-bar {
        display: none;
      }
      .nav-menu, .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .hero-headline {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .kpi-grid, .features-grid, .product-grid, .scenario-grid, .testi-grid, .news-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .compare-header-row, .compare-row {
        grid-template-columns: 1fr 1fr;
      }
      .compare-traditional {
        display: none;
      }
      .timeline-wrap::before {
        left: 20px;
      }
      .timeline-node, .timeline-node.inverted {
        width: 100%;
        margin-left: 0;
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
      }
      .timeline-dot, .timeline-node.inverted .timeline-dot {
        left: 12px;
        right: auto;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .sticky-mobile-bar {
        display: block;
      }
    }