/* roulang page: index */
:root {
      --primary: #0F2B2E;
      --primary-light: #163B3F;
      --accent: #10B981;
      --accent-cyan: #06B6D4;
      --dark-bg: #091E21;
      --darker-bg: #040D0E;
      --light-bg: #F8FAFC;
      --white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #1D4347;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 43, 46, 0.06);
      --shadow-md: 0 12px 30px -4px rgba(15, 43, 46, 0.12);
      --shadow-dark: 0 16px 36px -4px rgba(0, 0, 0, 0.4);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      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: 1rem;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: var(--darker-bg);
      color: #94A3B8;
      font-size: 0.85rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
      box-shadow: 0 0 10px var(--accent);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.9); }
    }
    .top-bar-meta {
      display: flex;
      gap: 20px;
    }

    .header-main {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(15, 43, 46, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
      padding: 16px 0;
    }
    .header-main .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--white);
      letter-spacing: -0.02em;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--darker-bg);
      font-weight: 900;
      font-size: 1.1rem;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      color: #CBD5E1;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #04241B;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
    }
    .btn-primary:hover {
      background-color: #0EA271;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    }
    .btn-secondary {
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--white);
      border-color: rgba(255, 255, 255, 0.2);
    }
    .btn-secondary:hover {
      background-color: rgba(255, 255, 255, 0.16);
      border-color: rgba(255, 255, 255, 0.4);
      transform: translateY(-2px);
    }
    .btn-light {
      background-color: var(--white);
      color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .btn-light:hover {
      background-color: #F1F5F9;
      transform: translateY(-2px);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--white);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 8px;
    }

    /* 板块通用规范 */
    .section {
      padding: 96px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--dark-bg);
      color: var(--white);
    }
    .section-light {
      background-color: var(--light-bg);
      color: var(--text-main);
    }
    .section-white {
      background-color: var(--white);
      color: var(--text-main);
    }
    .section-header {
      margin-bottom: 56px;
    }
    .section-header.center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 9999px;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .tag-emerald {
      background-color: rgba(16, 185, 129, 0.12);
      color: var(--accent);
      border: 1px solid rgba(16, 185, 129, 0.25);
    }
    .tag-cyan {
      background-color: rgba(6, 182, 212, 0.12);
      color: var(--accent-cyan);
      border: 1px solid rgba(6, 182, 212, 0.25);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 16px;
      text-wrap: balance;
    }
    .section-desc {
      font-size: 1.05rem;
      line-height: 1.75;
      color: var(--text-muted);
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 【板块 1】Hero Bento 首屏 */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.15), transparent 45%),
                  radial-gradient(circle at 20% 80%, rgba(16, 185, 129, 0.12), transparent 50%),
                  linear-gradient(180deg, var(--primary) 0%, var(--dark-bg) 100%);
      padding: 72px 0 96px;
      color: var(--white);
      border-bottom: 1px solid var(--border-dark);
    }
    .bento-grid {
      display: grid;
      grid-template-columns: 12fr;
      gap: 24px;
    }
    @media (min-width: 992px) {
      .bento-grid {
        grid-template-columns: 7fr 5fr;
      }
    }
    .bento-card {
      background: rgba(15, 43, 46, 0.65);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-dark);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .bento-main-hero {
      position: relative;
      overflow: hidden;
    }
    .bento-main-hero::after {
      content: '';
      position: absolute;
      top: -50px;
      right: -50px;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--white) 30%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-text {
      font-size: 1.05rem;
      color: #CBD5E1;
      margin-bottom: 32px;
      max-width: 600px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .bento-sub-stack {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .bento-item-sub {
      background: rgba(15, 43, 46, 0.55);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
    }
    .bento-sub-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .bento-sub-title i {
      color: var(--accent);
    }
    .bento-sub-desc {
      font-size: 0.92rem;
      color: #94A3B8;
      line-height: 1.6;
    }
    .bento-hero-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-top: 20px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* 【板块 2】综合数字娱乐数据看板 (#metrics) */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
    }
    .metric-card {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .metric-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background-color: var(--accent);
    }
    .metric-num {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-detail {
      font-size: 0.85rem;
      color: var(--text-light);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .metric-badge {
      color: #047857;
      background-color: #D1FAE5;
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 700;
      font-size: 0.75rem;
    }

    /* 【板块 3】品牌与架构拓扑 (#architecture) */
    .architecture-wrapper {
      display: grid;
      grid-template-columns: 1fr;
      gap: 48px;
      align-items: center;
    }
    @media (min-width: 992px) {
      .architecture-wrapper {
        grid-template-columns: 1.1fr 0.9fr;
      }
    }
    .arch-card-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .arch-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }
    .arch-point-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .arch-point-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background-color: rgba(16, 185, 129, 0.15);
      color: #059669;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    /* 【板块 4】核心服务矩阵 (#services) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
      gap: 24px;
    }
    .service-card {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .service-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: rgba(15, 43, 46, 0.05);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
    }
    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .service-tag {
      background-color: #F1F5F9;
      color: #475569;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* 【板块 5】热门分析产品套件 (#products) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 28px;
    }
    .product-col-card {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .product-col-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .product-scope-tag {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      background-color: rgba(6, 182, 212, 0.12);
      color: #0891B2;
      margin-bottom: 16px;
    }
    .product-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .product-metrics-spec {
      background-color: var(--light-bg);
      border-radius: var(--radius-sm);
      padding: 16px;
      margin: 20px 0;
      font-size: 0.88rem;
    }
    .spec-item {
      display: flex;
      justify-content: space-between;
      padding: 6px 0;
      border-bottom: 1px dashed #CBD5E1;
    }
    .spec-item:last-child {
      border-bottom: none;
    }

    /* 【板块 6】深度理念与全量对比 (#insights) */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr;
      gap: 32px;
      margin-top: 36px;
    }
    @media (min-width: 860px) {
      .compare-container {
        grid-template-columns: 1fr 1fr;
      }
    }
    .compare-panel {
      padding: 36px;
      border-radius: var(--radius-md);
    }
    .compare-panel.traditional {
      background-color: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .compare-panel.modern {
      background: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, rgba(15, 43, 46, 0.4) 100%);
      border: 1px solid rgba(16, 185, 129, 0.35);
    }
    .compare-list {
      list-style: none;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .compare-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
    }

    /* 【板块 7】行业实证案例 (#cases) */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 32px;
    }
    @media (min-width: 900px) {
      .case-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    .case-card {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-img-box {
      height: 240px;
      overflow: hidden;
      position: relative;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-img-box img {
      transform: scale(1.05);
    }
    .case-body {
      padding: 32px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .case-step {
      margin-top: 14px;
      padding-left: 12px;
      border-left: 2px solid var(--accent);
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 【板块 8】里程碑时间轴 (#milestone) */
    .timeline-wrapper {
      position: relative;
      margin-top: 48px;
    }
    .timeline-track {
      position: absolute;
      top: 50%;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--border-dark);
      transform: translateY(-50%);
      z-index: 1;
      display: none;
    }
    @media (min-width: 768px) {
      .timeline-track {
        display: block;
      }
    }
    .timeline-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
      position: relative;
      z-index: 2;
    }
    @media (min-width: 768px) {
      .timeline-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }
    .timeline-node {
      background-color: var(--dark-bg);
      border: 1px solid var(--border-dark);
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .timeline-node-dot {
      width: 14px;
      height: 14px;
      background-color: var(--accent);
      border-radius: 50%;
      margin-bottom: 16px;
      box-shadow: 0 0 10px var(--accent);
    }
    .timeline-version {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-cyan);
      margin-bottom: 6px;
    }

    /* 【板块 9】用户与业界评价 (#testimonials) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }
    .testi-card {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testi-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .testi-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 【板块 10】行业前沿动态资讯 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 28px;
    }
    .news-card {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .news-img {
      height: 200px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .news-card:hover .news-img img {
      transform: scale(1.05);
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
      justify-content: space-between;
    }
    .news-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 12px;
    }
    .news-tag {
      background-color: #EEF2F6;
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .news-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: #059669;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 【板块 11】常见技术疑问手风琴 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 22px 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      transition: transform 0.3s ease;
      color: var(--accent);
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background-color: #F8FAFC;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.75;
      padding: 0 28px;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 0 28px 22px 28px;
    }

    /* 【板块 12】转化表单与数据接入 (#contact-form) */
    .convert-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 40px;
    }
    @media (min-width: 900px) {
      .convert-grid {
        grid-template-columns: 5fr 7fr;
      }
    }
    .convert-info {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .guarantee-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin: 28px 0;
    }
    .guarantee-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .guarantee-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background-color: rgba(16, 185, 129, 0.15);
      color: #059669;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 800;
      flex-shrink: 0;
    }
    .form-wrapper {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background-color: #FAFAFA;
      color: var(--text-main);
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--accent);
      background-color: var(--white);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 全局页脚 */
    .site-footer {
      background-color: var(--darker-bg);
      color: #94A3B8;
      padding: 72px 0 32px;
      border-top: 1px solid var(--border-dark);
      font-size: 0.92rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-brand h3 {
      color: var(--white);
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      font-size: 0.88rem;
    }
    .footer-col h4 {
      color: var(--white);
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }

    @media (max-width: 768px) {
      .header-main .main-nav {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .section {
        padding: 64px 0;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }