/* roulang page: index */
:root {
      --primary: #0052D9;
      --primary-hover: #003cab;
      --accent: #FF5E00;
      --accent-hover: #e05200;
      --bg-main: #F5F7FA;
      --bg-white: #FFFFFF;
      --bg-dark: #0D1117;
      --bg-dark-card: #161B22;
      --text-dark: #1D2129;
      --text-body: #4E5969;
      --text-muted: #86909C;
      --border-color: #E5E6EB;
      --border-dark: #30363D;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-sm: 0 2px 8px rgba(0, 82, 217, 0.05);
      --shadow-md: 0 6px 16px rgba(0, 82, 217, 0.08);
      --shadow-hover: 0 12px 24px rgba(0, 82, 217, 0.14);
      --transition: all 0.25s ease;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 顶部微型信息条与主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    }
    .topbar {
      background-color: #0B132B;
      color: #C0C4CC;
      font-size: 0.82rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-left span {
      margin-right: 18px;
    }
    .topbar-left i {
      color: var(--accent);
      margin-right: 6px;
    }
    .navbar {
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.02em;
    }
    .brand-logo .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #1677FF);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 1.1rem;
    }
    .brand-logo span b {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 22px;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 6px 2px;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-header-cta {
      background: var(--accent);
      color: #fff;
      padding: 9px 20px;
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-header-cta:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.4rem;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 基础板块与标题样式 */
    .section-block {
      padding: 85px 0;
      position: relative;
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-gray {
      background-color: var(--bg-main);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #ECF2F8;
    }
    .section-header {
      margin-bottom: 45px;
    }
    .section-header.center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      padding: 4px 12px;
      border-radius: 9999px;
      background: rgba(0, 82, 217, 0.08);
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-dark .section-badge {
      background: rgba(255, 94, 0, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.02rem;
      color: var(--text-body);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #8B949E;
    }

    /* 1. Hero 板块（双栏门户：左主张右快捷入口网格） */
    .hero-section {
      background-color: #0F172A;
      background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.94)), url('/assets/images/b5eee07d4f06a855.webp');
      background-size: cover;
      background-position: center;
      color: #fff;
      padding: 90px 0 100px;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 94, 0, 0.2);
      border: 1px solid rgba(255, 94, 0, 0.4);
      color: #FFA366;
      padding: 6px 14px;
      border-radius: 9999px;
      font-size: 0.85rem;
      margin-bottom: 20px;
    }
    .hero-h1 {
      font-size: 2.65rem;
      font-weight: 800;
      line-height: 1.25;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-intro {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-main {
      background: var(--accent);
      color: #fff;
      padding: 13px 28px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 14px rgba(255, 94, 0, 0.35);
    }
    .btn-main:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 13px 26px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.18);
      color: #fff;
    }
    .hero-portal-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-lg);
      padding: 28px;
    }
    .portal-header {
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 14px;
      margin-bottom: 20px;
    }
    .portal-header h3 {
      font-size: 1.15rem;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .portal-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }
    .portal-card {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 16px;
      transition: var(--transition);
      display: block;
    }
    .portal-card:hover {
      background: rgba(0, 82, 217, 0.25);
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .portal-card .card-icon {
      font-size: 1.5rem;
      color: #60A5FA;
      margin-bottom: 8px;
    }
    .portal-card h4 {
      font-size: 0.96rem;
      color: #fff;
      margin-bottom: 4px;
    }
    .portal-card p {
      font-size: 0.78rem;
      color: #94A3B8;
      line-height: 1.4;
    }

    /* 2. 闪购/训练营限时抢报条 */
    .flash-camp-bar {
      background: linear-gradient(90deg, #1E1B4B, #0F172A);
      color: #fff;
      padding: 24px 0;
      border-bottom: 2px solid var(--accent);
    }
    .flash-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }
    .flash-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .flash-badge {
      background: var(--accent);
      color: #fff;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 700;
      font-size: 0.85rem;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { opacity: 1; }
      50% { opacity: 0.6; }
      100% { opacity: 1; }
    }
    .flash-timer {
      display: flex;
      align-items: center;
      gap: 8px;
      font-family: monospace;
      font-size: 1.15rem;
      font-weight: 700;
      color: #FBBF24;
    }
    .flash-timer span {
      background: rgba(255, 255, 255, 0.12);
      padding: 4px 8px;
      border-radius: 4px;
    }
    .flash-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .stock-tag {
      font-size: 0.85rem;
      color: #F87171;
    }

    /* 3. 安全主张与体能监测技术区 */
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .tech-specs-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .specs-header {
      background: #F0F5FF;
      padding: 18px 24px;
      border-bottom: 1px solid #D6E4FF;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .specs-header h4 {
      color: var(--primary);
      font-size: 1.05rem;
      font-weight: 700;
    }
    .specs-list {
      padding: 20px 24px;
      list-style: none;
    }
    .specs-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.92rem;
    }
    .specs-item:last-child {
      border-bottom: none;
    }
    .specs-item .param-label {
      color: var(--text-muted);
    }
    .specs-item .param-value {
      color: var(--text-dark);
      font-weight: 600;
    }

    /* 4. 指标看板（6卡片网格布局） */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .metric-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: #ADC6FF;
    }
    .metric-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .metric-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: #E8F3FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
    }
    .metric-tag {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 9999px;
      background: #E6FFFB;
      color: #08979C;
      border: 1px solid #87E8DE;
    }
    .metric-card h3 {
      font-size: 1.12rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .metric-card p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 5. 服务矩阵与主力产品方案（3大方案卡片） */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .matrix-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .matrix-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .matrix-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 8px 24px rgba(0, 82, 217, 0.12);
    }
    .featured-badge {
      position: absolute;
      top: -13px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #fff;
      font-size: 0.76rem;
      font-weight: 700;
      padding: 3px 14px;
      border-radius: 9999px;
    }
    .matrix-head {
      margin-bottom: 20px;
    }
    .matrix-head h3 {
      font-size: 1.35rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .matrix-head p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .matrix-feature-list {
      list-style: none;
      margin: 20px 0 28px;
      flex-grow: 1;
    }
    .matrix-feature-list li {
      padding: 8px 0;
      font-size: 0.9rem;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px solid #F2F3F5;
    }
    .matrix-feature-list li i {
      color: #52C41A;
      font-size: 0.85rem;
    }

    /* 6. 深色理念与数据流对比区 */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 20px;
    }
    .compare-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .compare-box.active-box {
      border-color: rgba(0, 82, 217, 0.6);
      box-shadow: 0 0 20px rgba(0, 82, 217, 0.15);
    }
    .compare-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compare-box.old .compare-title {
      color: #A1A1AA;
    }
    .compare-box.active-box .compare-title {
      color: #60A5FA;
    }
    .compare-list {
      list-style: none;
      margin-top: 18px;
    }
    .compare-item {
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.92rem;
    }
    .bar-wrapper {
      margin-top: 8px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 9999px;
      height: 8px;
      overflow: hidden;
    }
    .bar-fill {
      height: 100%;
      border-radius: 9999px;
    }

    /* 7. 里程碑与进阶成长轴 */
    .milestone-stepper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .milestone-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .milestone-step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 16px;
    }
    .milestone-card h4 {
      font-size: 1.08rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .milestone-card p {
      font-size: 0.86rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 8. 实战案例与用户故事区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .case-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .case-thumb {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-thumb img {
      transform: scale(1.05);
    }
    .case-body {
      padding: 22px;
    }
    .case-meta {
      display: flex;
      justify-content: space-between;
      margin-bottom: 10px;
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 600;
    }
    .case-body h4 {
      font-size: 1.15rem;
      color: var(--text-dark);
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .case-body p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 9. 关键数据统计条（4列指标看板） */
    .stats-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-counter-box {
      text-align: center;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 16px;
      box-shadow: var(--shadow-sm);
    }
    .stat-counter-box .number {
      font-size: 2.3rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      letter-spacing: -0.02em;
    }
    .stat-counter-box .label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 10. 教练背书与评价墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .testimonial-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-dark);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }
    .testimonial-quote::before {
      content: "\201C";
      font-size: 3rem;
      color: #E5E6EB;
      position: absolute;
      top: -24px;
      left: -8px;
      z-index: 0;
      font-family: serif;
    }
    .testimonial-quote p {
      position: relative;
      z-index: 1;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #F2F3F5;
      padding-top: 16px;
    }
    .user-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #E8F3FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      overflow: hidden;
    }
    .user-info h5 {
      font-size: 0.95rem;
      color: var(--text-dark);
      margin-bottom: 2px;
    }
    .user-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 11. 资讯摘要与训练知识库 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .news-card h4 {
      font-size: 1.1rem;
      color: var(--text-dark);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-card p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 18px;
    }
    .news-link {
      font-size: 0.86rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: var(--accent);
    }

    /* 12. 平台保障与合规认证区 */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .assurance-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .assurance-icon {
      width: 54px;
      height: 54px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: #E8F3FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
    }
    .assurance-card h4 {
      font-size: 1.05rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .assurance-card p {
      font-size: 0.84rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 13. FAQ折叠与转化表单区 */
    .faq-form-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 40px;
      align-items: flex-start;
    }
    .accordion-group {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .accordion-header {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-dark);
      font-size: 0.98rem;
    }
    .accordion-header i {
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }
    .accordion-content {
      padding: 0 22px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.35s ease;
      color: var(--text-body);
      font-size: 0.9rem;
      line-height: 1.65;
    }
    .accordion-item.active {
      border-left: 4px solid var(--accent);
      border-color: #D6E4FF;
    }
    .accordion-item.active .accordion-header {
      color: var(--primary);
    }
    .accordion-item.active .accordion-header i {
      transform: rotate(180deg);
      color: var(--accent);
    }
    .accordion-item.active .accordion-content {
      padding-bottom: 20px;
      max-height: 200px;
    }
    .lead-form-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-dark);
      background: #F8FAFC;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.12);
    }
    .btn-submit-form {
      width: 100%;
      background: var(--accent);
      color: #FFFFFF;
      border: none;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
    }
    .btn-submit-form:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 14px rgba(255, 94, 0, 0.35);
    }

    /* 页脚 */
    .site-footer {
      background: #0B0E14;
      color: #8B949E;
      padding: 70px 0 28px;
      font-size: 0.88rem;
      border-top: 1px solid #21262D;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand .brand-logo {
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #8B949E;
      margin-bottom: 16px;
    }
    .footer-title {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      color: #8B949E;
    }
    .footer-contact i {
      color: var(--accent);
      margin-top: 4px;
    }
    .footer-bottom {
      border-top: 1px solid #21262D;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #6E7681;
    }
    .footer-bottom a {
      color: #8B949E;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .tech-grid, .faq-form-grid, .compare-container {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .metrics-grid, .matrix-grid, .case-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .milestone-stepper, .assurance-grid, .stats-bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-action .btn-header-cta {
        padding: 7px 14px;
        font-size: 0.82rem;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .portal-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .matrix-grid, .case-grid, .news-grid, .testimonial-grid,
      .milestone-stepper, .assurance-grid, .stats-bar-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-block {
        padding: 60px 0;
      }
      .lead-form-box {
        padding: 22px;
      }
    }