/* roulang page: index */
/* CSS 设计变量与主题规范 */
    :root {
      --primary: #0B3037;
      --primary-light: #16464F;
      --primary-dark: #07191E;
      --accent: #00BA7C;
      --accent-hover: #009E69;
      --accent-glow: rgba(0, 186, 124, 0.25);
      --energy-orange: #FF5A1F;
      --energy-orange-hover: #E4480E;
      --bg-main: #F7F9FA;
      --bg-card: #FFFFFF;
      --bg-dark-section: #07191E;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-white: #F8FAFC;
      --border-color: #E2E8F0;
      --border-dark: #1E3A40;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 8px rgba(11, 48, 55, 0.04);
      --shadow-md: 0 6px 24px -4px rgba(11, 48, 55, 0.08);
      --shadow-lg: 0 16px 36px -8px rgba(11, 48, 55, 0.14);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
      --container-max: 1240px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 基础重置 */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-family);
      color: var(--text-body);
      background-color: var(--bg-main);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
      border: none;
    }

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部微型工具栏 */
    .topbar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-left span {
      margin-right: 20px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .badge-pulse {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 2px rgba(0, 186, 124, 0.4);
    }

    /* 主导航栏 */
    .site-header {
      background-color: #ffffff;
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 16px rgba(11, 48, 55, 0.06);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--accent);
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--accent);
    }
    .nav-links li a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition);
    }
    .nav-links li a:hover::after,
    .nav-links li a.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 按钮通用系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 22px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 14px var(--accent-glow);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(0, 186, 124, 0.35);
    }
    .btn-orange {
      background-color: var(--energy-orange);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 90, 31, 0.25);
    }
    .btn-orange:hover {
      background-color: var(--energy-orange-hover);
      transform: translateY(-1px);
    }
    .btn-outline-white {
      background-color: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #ffffff;
      backdrop-filter: blur(8px);
    }
    .btn-outline-white:hover {
      background-color: #ffffff;
      color: var(--primary);
    }
    .btn-outline-dark {
      border: 1px solid var(--border-color);
      color: var(--primary);
      background-color: #ffffff;
    }
    .btn-outline-dark:hover {
      border-color: var(--primary);
      background-color: #f1f5f9;
    }

    /* 通用板块与排版 */
    section {
      padding: 86px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 54px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 30px;
      background-color: rgba(0, 186, 124, 0.12);
      color: #00875A;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 1. 首屏 Banner (#hero) 蓝图：直播与运控发布看板 */
    #hero {
      padding: 80px 0 90px;
      background: linear-gradient(135deg, #07191E 0%, #0B3037 60%, #16464F 100%);
      color: #ffffff;
      position: relative;
      overflow: hidden;
    }
    #hero::before {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      background-image: url('/assets/images/35745af60e597d9e.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.28;
      margin-bottom: 22px;
      color: #ffffff;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      color: var(--accent);
      background: linear-gradient(90deg, #00BA7C 0%, #5EEAD4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      align-items: center;
      margin-bottom: 32px;
    }
    .hero-live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 90, 31, 0.18);
      border: 1px solid rgba(255, 90, 31, 0.4);
      padding: 6px 14px;
      border-radius: 20px;
      color: #FF8F66;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .hero-live-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--energy-orange);
      box-shadow: 0 0 8px var(--energy-orange);
    }
    .hero-dashboard-card {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .hero-card-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 16px;
      margin-bottom: 18px;
    }
    .hero-card-title {
      font-size: 15px;
      font-weight: 600;
      color: #E2E8F0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-countdown-box {
      background: rgba(0, 0, 0, 0.35);
      border-radius: var(--radius-md);
      padding: 16px;
      margin-bottom: 18px;
      display: flex;
      justify-content: space-around;
      text-align: center;
    }
    .countdown-item .num {
      font-size: 26px;
      font-weight: 800;
      color: var(--accent);
      font-family: monospace;
      display: block;
    }
    .countdown-item .lbl {
      font-size: 12px;
      color: #94A3B8;
    }
    .hero-feature-tags {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .hero-feature-tag-item {
      background: rgba(255, 255, 255, 0.04);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: #CBD5E1;
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    /* 2. 运营痛点剖析 (#pain-points) */
    #pain-points {
      background-color: #FFFFFF;
    }
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      position: relative;
      border-top: 3px solid #CBD5E1;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-top-color: var(--energy-orange);
    }
    .pain-icon-wrapper {
      width: 44px;
      height: 44px;
      background: rgba(255, 90, 31, 0.1);
      color: var(--energy-orange);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-weight: 700;
    }
    .pain-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .pain-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 3. 一体化架构与解决方案 (#solutions) */
    #solutions {
      background-color: #F1F5F9;
    }
    .solution-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .solution-img-wrapper {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .solution-info h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .solution-info p {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .solution-specs {
      background: #F8FAFC;
      border-left: 3px solid var(--accent);
      padding: 14px 18px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-size: 14px;
      color: var(--text-body);
      margin-bottom: 24px;
    }
    .solution-specs strong {
      color: var(--primary);
    }
    .solution-checklist {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .solution-checklist li {
      font-size: 14px;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .solution-checklist li::before {
      content: '✓';
      display: inline-block;
      color: var(--accent);
      font-weight: bold;
    }

    /* 4. 六维核心优势矩阵 (#advantages) */
    #advantages {
      background-color: #FFFFFF;
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(0, 186, 124, 0.4);
    }
    .adv-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--accent), var(--primary));
      opacity: 0;
      transition: var(--transition);
    }
    .adv-card:hover::after {
      opacity: 1;
    }
    .adv-num {
      font-size: 24px;
      font-weight: 800;
      color: #94A3B8;
      margin-bottom: 14px;
      font-family: monospace;
    }
    .adv-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 5. 核心热门子系统 (#features) */
    #features {
      background-color: #F8FAFC;
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .feature-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .feature-img-wrapper {
      height: 200px;
      overflow: hidden;
    }
    .feature-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .feature-card:hover .feature-img-wrapper img {
      transform: scale(1.04);
    }
    .feature-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .feature-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .feature-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }
    .feature-pill-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .feature-pill {
      font-size: 12px;
      background: #F1F5F9;
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 6. 四步落地实施法 (#methodology) */
    #methodology {
      background-color: #FFFFFF;
    }
    .method-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .method-timeline::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: #E2E8F0;
      z-index: 1;
    }
    .method-step {
      background: #FFFFFF;
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 0 12px;
    }
    .method-circle {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 2px solid var(--accent);
      color: var(--primary);
      font-size: 20px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      box-shadow: 0 0 0 6px #F0FDF4;
      transition: var(--transition);
    }
    .method-step:hover .method-circle {
      background: var(--accent);
      color: #ffffff;
      transform: scale(1.08);
    }
    .method-step h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .method-step p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 7. 深色沉浸理念与技术拓扑 (#philosophy) */
    #philosophy {
      background-color: var(--bg-dark-section);
      color: var(--text-white);
      padding: 96px 0;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .philosophy-text h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 20px;
      color: #ffffff;
    }
    .philosophy-text p {
      font-size: 15px;
      color: #94A3B8;
      line-height: 1.85;
      margin-bottom: 24px;
    }
    .tech-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .tech-badge-item {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: #CBD5E1;
    }
    .philosophy-box {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .topology-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px;
      background: rgba(0, 0, 0, 0.25);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      border-left: 3px solid var(--accent);
    }
    .topology-row:last-child {
      margin-bottom: 0;
    }
    .topology-title {
      font-size: 14px;
      font-weight: 600;
      color: #F8FAFC;
    }
    .topology-status {
      font-size: 12px;
      color: var(--accent);
      background: rgba(0, 186, 124, 0.15);
      padding: 2px 8px;
border-radius: 4px;
    }

    /* 8. 运营效能与量化看板条 (#stats) */
    #stats {
      background-color: var(--primary);
      color: #ffffff;
      padding: 64px 0;
      position: relative;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .stat-card {
      position: relative;
      padding: 12px 16px;
    }
    .stat-card:not(:last-child)::after {
      content: '';
      position: absolute;
      right: -16px;
      top: 20%;
      height: 60%;
      width: 1px;
      background: rgba(255, 255, 255, 0.15);
    }
    .stat-number {
      font-size: 44px;
      font-weight: 800;
      color: #ffffff;
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace;
      letter-spacing: -1px;
    }
    .stat-number span {
      color: var(--accent);
      font-size: 28px;
    }
    .stat-label {
      font-size: 15px;
      color: #CBD5E1;
      font-weight: 500;
    }
    .stat-sub {
      font-size: 12px;
      color: #94A3B8;
      margin-top: 4px;
    }

    /* 9. 标杆俱乐部应用案例 (#case-studies) */
    #case-studies {
      background-color: #FFFFFF;
    }
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .case-card {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .case-thumb {
      height: 190px;
      position: relative;
      overflow: hidden;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(11, 48, 55, 0.85);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }
    .case-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .case-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .case-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      flex: 1;
    }
    .case-metrics {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }
    .case-metrics span strong {
      color: var(--energy-orange);
      font-weight: 700;
    }

    /* 10. 全场景适用图谱 (#audiences) */
    #audiences {
      background-color: #F1F5F9;
    }
    .audience-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .audience-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: left;
      transition: var(--transition);
    }
    .audience-card:hover {
      background: #FFFFFF;
      border-color: var(--accent);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .audience-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 2px solid #F1F5F9;
    }
    .audience-card ul {
      list-style: none;
    }
    .audience-card li {
      font-size: 13px;
      color: var(--text-body);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .audience-card li::before {
      content: '•';
      color: var(--accent);
      font-size: 16px;
    }

    /* 11. 主理人与教练口碑评价 (#testimonials) */
    #testimonials {
      background-color: #FFFFFF;
    }
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .testi-quote {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 24px;
      position: relative;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-top: 16px;
      border-top: 1px dashed #CBD5E1;
    }
    .testi-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #E2E8F0;
      overflow: hidden;
      border: 2px solid var(--accent);
    }
    .testi-meta h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 12. 产业前沿洞察与运营内参 (#insights) */
    #insights {
      background-color: #F8FAFC;
    }
    .insight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
      cursor: pointer;
    }
    .insight-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .insight-cover {
      height: 180px;
      overflow: hidden;
    }
    .insight-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-cat {
      font-size: 12px;
      font-weight: 600;
      color: #00875A;
      margin-bottom: 8px;
      display: inline-block;
    }
    .insight-body h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex: 1;
    }
    .insight-date {
      font-size: 12px;
      color: #94A3B8;
      border-top: 1px solid #F1F5F9;
      padding-top: 12px;
    }

    /* 13. 高频常见问答 (#faq) */
    #faq {
      background-color: #FFFFFF;
    }
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      background: #FFFFFF;
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
      user-select: none;
      background: #FFFFFF;
      transition: background-color 0.2s ease;
    }
    .faq-question:hover {
      background-color: #F8FAFC;
    }
    .faq-question::after {
      content: '+';
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-question::after {
      content: '−';
      color: var(--accent);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 14. 转化底线区 (#final-cta) */
    #final-cta {
      background: linear-gradient(135deg, #07191E 0%, #0B3037 100%);
      color: #FFFFFF;
      padding: 80px 0;
      position: relative;
    }
    .cta-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 48px;
      backdrop-filter: blur(10px);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .cta-text h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .cta-text p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .cta-support-tags {
      display: flex;
      gap: 16px;
      font-size: 13px;
      color: #94A3B8;
    }
    .cta-support-tags span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .cta-support-tags span::before {
      content: '✓';
      color: var(--accent);
    }
    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .form-group input, .form-group select {
      width: 100%;
      height: 48px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      padding: 0 16px;
      color: #FFFFFF;
      font-size: 14px;
      transition: var(--transition);
    }
    .form-group select option {
      background: #0B3037;
      color: #FFFFFF;
    }
    .form-group input:focus, .form-group select:focus {
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.14);
    }
    .form-group input::placeholder {
      color: #94A3B8;
    }

    /* 页脚组件 */
    .site-footer {
      background-color: #040E11;
      color: #94A3B8;
      font-size: 13px;
      padding: 64px 0 32px;
      border-top: 1px solid var(--border-dark);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 18px;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.8;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      font-size: 15px;
      color: #E2E8F0;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a:hover {
      color: var(--accent);
    }
    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      margin-bottom: 12px;
      line-height: 1.6;
    }
    .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;
    }
    .footer-bottom a {
      color: #94A3B8;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 移动端汉堡菜单触发器 */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    /* 响应式媒体查询断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .adv-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .method-timeline {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .method-timeline::before {
        display: none;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .stat-card:not(:last-child)::after {
        display: none;
      }
      .audience-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-card {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .solution-block {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .philosophy-grid {
        grid-template-columns: 1fr;
      }
      .feature-grid, .case-grid, .testimonial-grid, .insight-grid {
        grid-template-columns: 1fr;
      }
      .pain-grid, .adv-grid, .audience-grid, .method-timeline {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }