/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --primary-light: #EEF2FF;
      --secondary: #06B6D4;
      --secondary-dark: #0891B2;
      --bg-base: #F8FAFC;
      --bg-surface: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.1);
      --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.15);
      --transition: all 0.25s ease;
      --max-w: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-muted);
      background-color: var(--bg-base);
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--max-w);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* Top Strip */
    .top-strip {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 0.85rem;
      border-bottom: 1px solid #1E293B;
      padding: 0.45rem 0;
    }
    .top-strip-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }
    .dot-live {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 8px #10B981;
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .brand-badge {
      display: inline-block;
      padding: 0.2rem 0.6rem;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #FFF;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      font-weight: 700;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 1.75rem;
      list-style: none;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 0.35rem 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.65rem 1.4rem;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.4);
    }
    .btn-secondary {
      background-color: var(--primary-light);
      color: var(--primary);
    }
    .btn-secondary:hover {
      background-color: #E0E7FF;
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: #CBD5E1;
      color: var(--text-main);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-dark {
      background: #334155;
      color: #F8FAFC;
    }
    .btn-dark:hover {
      background: #475569;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Section Base */
    section {
      padding: 5rem 0;
      position: relative;
    }
    .section-head {
      margin-bottom: 3rem;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      padding: 0.25rem 0.8rem;
      background-color: var(--primary-light);
      color: var(--primary);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 0.85rem;
      letter-spacing: 0.05em;
    }
    .section-title {
      font-size: 2.2rem;
      color: var(--text-main);
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 1rem;
    }
    .section-desc {
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
      color: var(--text-light);
      font-size: 1.05rem;
    }

    /* 1. Hero 板块（影视海报沉浸暗底风格） */
    .hero-section {
      background-color: #0A0F1D;
      background-image: linear-gradient(180deg, rgba(10, 15, 29, 0.75) 0%, rgba(10, 15, 29, 0.95) 100%), url('/assets/images/8b63a04330565236.jpg');
      background-size: cover;
      background-position: center;
      color: #F8FAFC;
      padding: 6rem 0 7rem;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-badge-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 1.5rem;
    }
    .hero-badge {
      background: rgba(79, 70, 229, 0.25);
      border: 1px solid rgba(129, 140, 248, 0.4);
      color: #A5B4FC;
      padding: 0.35rem 0.85rem;
      border-radius: 999px;
      font-size: 0.82rem;
      font-weight: 600;
    }
    .hero-heat-badge {
      background: rgba(239, 68, 68, 0.2);
      border: 1px solid rgba(248, 113, 113, 0.4);
      color: #FCA5A5;
      padding: 0.35rem 0.85rem;
      border-radius: 999px;
      font-size: 0.82rem;
      font-weight: 600;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -0.02em;
    }
    .hero-title span {
      background: linear-gradient(135deg, #818CF8 0%, #22D3EE 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 1.1rem;
      color: #CBD5E1;
      margin-bottom: 2rem;
      line-height: 1.8;
    }
    .hero-cta-group {
      display: flex;
      gap: 1.25rem;
      flex-wrap: wrap;
      margin-bottom: 2.5rem;
    }
    .hero-stats-quick {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-stat-item b {
      display: block;
      font-size: 1.5rem;
      color: #FFFFFF;
      font-weight: 700;
    }
    .hero-stat-item span {
      font-size: 0.82rem;
      color: #94A3B8;
    }
    .hero-poster-frame {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      background: #020617;
    }
    .hero-poster-frame img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .hero-poster-frame:hover img {
      transform: scale(1.03);
    }
    .hero-poster-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(0deg, #0A0F1D 0%, rgba(10, 15, 29, 0.85) 60%, transparent 100%);
      padding: 1.75rem;
    }
    .hero-poster-tag {
      font-size: 0.75rem;
      background: var(--secondary);
      color: #000;
      font-weight: 700;
      padding: 0.2rem 0.6rem;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 0.5rem;
    }

    /* 2. 产品价值与综合介绍板块 */
    .section-intro {
      background-color: #FFFFFF;
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .intro-param-box {
      margin-top: 1.75rem;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.25rem;
    }
    .param-card {
      background: var(--bg-base);
      border: 1px solid var(--border-color);
      padding: 1.25rem;
      border-radius: var(--radius-sm);
    }
    .param-card h4 {
      color: var(--primary);
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 0.25rem;
    }
    .param-card p {
      font-size: 0.88rem;
      color: var(--text-light);
    }
    .intro-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    /* 3. 六大核心优势矩阵 */
    .section-advantages {
      background-color: var(--bg-base);
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .adv-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .adv-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: #C7D2FE;
    }
    .adv-icon-pill {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .adv-card h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .adv-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 4. 热门娱乐项目三卡片 */
    .section-products {
      background-color: #FFFFFF;
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .product-img-holder {
      height: 220px;
      position: relative;
      overflow: hidden;
      background: #1E293B;
    }
    .product-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-holder img {
      transform: scale(1.05);
    }
    .product-status-pill {
      position: absolute;
      top: 1rem;
      left: 1rem;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(4px);
      color: #38BDF8;
      font-size: 0.78rem;
      font-weight: 700;
      padding: 0.3rem 0.7rem;
      border-radius: 999px;
      border: 1px solid rgba(56, 189, 248, 0.4);
    }
    .product-content {
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-content h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .product-content p {
      font-size: 0.93rem;
      color: var(--text-muted);
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .meter-box {
      margin-bottom: 1.25rem;
    }
    .meter-label {
      display: flex;
      justify-content: space-between;
      font-size: 0.82rem;
      color: var(--text-light);
      margin-bottom: 0.35rem;
      font-weight: 600;
    }
    .meter-bar {
      height: 6px;
      background: #E2E8F0;
      border-radius: 999px;
      overflow: hidden;
    }
    .meter-fill {
      height: 100%;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }

    /* 5. 深色理念与底层引擎架构 */
    .section-engine {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .engine-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .engine-feature-list {
      list-style: none;
      margin-top: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }
    .engine-item {
      display: flex;
      gap: 1rem;
      align-items: flex-start;
      background: var(--bg-dark-card);
      padding: 1.25rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-dark);
    }
    .engine-icon {
      color: var(--secondary);
      font-size: 1.35rem;
      font-weight: 700;
      line-height: 1;
    }
    .engine-item h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      margin-bottom: 0.35rem;
    }
    .engine-item p {
      font-size: 0.88rem;
      color: #94A3B8;
      line-height: 1.6;
    }
    .engine-visual {
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }

    /* 6. 三步上手流程与创作者赋能 */
    .section-steps {
      background-color: #FFFFFF;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      position: relative;
    }
    .step-card {
      background: var(--bg-base);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.25rem 1.75rem;
      position: relative;
      transition: var(--transition);
    }
    .step-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .step-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: #E2E8F0;
      position: absolute;
      top: 1.25rem;
      right: 1.5rem;
      line-height: 1;
    }
    .step-card h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      margin-bottom: 0.75rem;
      position: relative;
    }
    .step-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      position: relative;
      line-height: 1.7;
    }

    /* 7. 关键运营数据统计条 */
    .section-metrics {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      padding: 4rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-item {
      padding: 1.25rem;
    }
    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 0.45rem;
      letter-spacing: -0.03em;
    }
    .metric-value span {
      color: #38BDF8;
      font-size: 1.75rem;
    }
    .metric-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #E0E7FF;
      margin-bottom: 0.25rem;
    }
    .metric-sub {
      font-size: 0.85rem;
      color: #A5B4FC;
    }

    /* 8. 多端入口与生态互联 */
    .section-clients {
      background-color: #FFFFFF;
    }
    .clients-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .client-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem 1.5rem;
      text-align: center;
      background: var(--bg-base);
      transition: var(--transition);
    }
    .client-card:hover {
      background: #FFFFFF;
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .client-icon {
      font-size: 2.25rem;
      margin-bottom: 1rem;
      display: inline-block;
    }
    .client-card h4 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 0.45rem;
    }
    .client-card p {
      font-size: 0.88rem;
      color: var(--text-light);
      margin-bottom: 1.25rem;
    }
    .client-status {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      color: #059669;
      background: #D1FAE5;
      padding: 0.25rem 0.65rem;
      border-radius: 999px;
    }

    /* 9. 用户社区评价墙与创作者声音 */
    .section-reviews {
      background-color: var(--bg-base);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .review-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1.25rem;
    }
    .review-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #E2E8F0;
      object-fit: cover;
      border: 2px solid var(--primary-light);
    }
    .review-author h4 {
      font-size: 1rem;
      color: var(--text-main);
      font-weight: 700;
    }
    .review-author span {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 1.25rem;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 0.95rem;
    }

    /* 10. 前沿动态与社区资讯板块 */
    .section-news {
      background-color: #FFFFFF;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--bg-base);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      background: #FFFFFF;
    }
    .news-img-box {
      height: 180px;
      overflow: hidden;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-img-box img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.82rem;
      color: var(--text-light);
      margin-bottom: 0.65rem;
    }
    .news-tag {
      color: var(--primary);
      font-weight: 700;
    }
    .news-body h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 0.65rem;
      line-height: 1.45;
    }
    .news-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 11. 社区准则与多重保障条 */
    .section-security {
      background-color: var(--bg-base);
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.75rem;
    }
    .security-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      text-align: center;
      transition: var(--transition);
    }
    .security-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .sec-badge {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
    }
    .security-card h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }
    .security-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. 平台常见问题 FAQ 手风琴 */
    .section-faq {
      background-color: #FFFFFF;
    }
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      background: var(--bg-base);
    }
    .faq-question {
      padding: 1.25rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      color: var(--text-main);
      font-size: 1.05rem;
      user-select: none;
      transition: background-color 0.2s ease;
    }
    .faq-question:hover {
      background-color: #EEF2FF;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #FFFFFF;
      padding: 0 1.5rem;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1.25rem 1.5rem;
      border-top: 1px solid var(--border-color);
    }
    .faq-answer p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 13. 底部沉浸式转化收口 CTA */
    .section-cta-wrap {
      background-color: var(--bg-base);
      padding: 4.5rem 0 5.5rem;
    }
    .cta-card-box {
      background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
      border-radius: var(--radius-lg);
      padding: 4rem 2rem;
      text-align: center;
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
      border: 1px solid #312E81;
      box-shadow: var(--shadow-lg);
    }
    .cta-card-box h2 {
      font-size: 2.4rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: #FFFFFF;
    }
    .cta-card-box p {
      max-width: 650px;
      margin: 0 auto 2.25rem;
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.75;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 1.25rem;
      flex-wrap: wrap;
    }

    /* Footer */
    .site-footer {
      background-color: #0A0F1D;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1E293B;
      font-size: 0.92rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-col p {
      line-height: 1.75;
      margin-bottom: 1rem;
      color: #94A3B8;
    }
    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-nav-list a {
      color: #94A3B8;
    }
    .footer-nav-list a:hover {
      color: #38BDF8;
    }
    .footer-cert-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 0.75rem;
    }
    .cert-pill {
      font-size: 0.75rem;
      background: #1E293B;
      color: #CBD5E1;
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      border: 1px solid #334155;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* 移动端与平板响应式 */
    @media (max-width: 1024px) {
      .hero-grid, .intro-grid, .engine-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .adv-grid, .products-grid, .news-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid, .clients-grid, .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 2.4rem;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 3.5rem 0;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .adv-grid, .products-grid, .news-grid, .reviews-grid, .steps-grid, .clients-grid, .security-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .hero-title {
        font-size: 1.95rem;
      }
      .hero-stats-quick {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }