/* roulang page: index */
:root {
      --primary: #00B578;
      --primary-dark: #008F5D;
      --primary-light: #E6F8F1;
      --dark-space: #0F172A;
      --dark-navy: #1E293B;
      --dark-muted: #334155;
      --text-main: #1E293B;
      --text-body: #475569;
      --text-light: #64748B;
      --bg-white: #FFFFFF;
      --bg-soft: #F8FAFC;
      --bg-slate: #F1F5F9;
      --border-color: #E2E8F0;
      --border-light: #EEF2F6;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.08);
      --shadow-xl: 0 20px 32px -8px rgba(15, 23, 42, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-pill: 9999px;
      --font-stack: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --transition: all 0.25s 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: var(--font-stack);
      color: var(--text-body);
      background-color: var(--bg-white);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    ul, ol {
      list-style: none;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: var(--dark-space);
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .top-tag {
      background: rgba(0, 181, 120, 0.2);
      color: #34D399;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 500;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: var(--dark-space);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 34px;
      height: 34px;
      fill: var(--primary);
    }
    .brand-logo span {
      background: linear-gradient(135deg, var(--dark-space) 30%, var(--primary-dark) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--dark-navy);
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(0, 181, 120, 0.28);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(0, 181, 120, 0.36);
    }
    .btn-secondary {
      background-color: var(--bg-white);
      color: var(--dark-navy);
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background-color: var(--bg-soft);
      border-color: #CBD5E1;
      color: var(--primary-dark);
    }
    .btn-outline-white {
      background-color: transparent;
      color: #FFFFFF;
      border-color: rgba(255, 255, 255, 0.3);
    }
    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--dark-space);
      font-size: 24px;
      cursor: pointer;
      padding: 6px;
    }

    /* 板块排版标准 */
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }
    .section-heading {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-dark);
      background-color: var(--primary-light);
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--dark-space);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* 1. 首屏轮播区（Hero Slider / #home） */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #09111E 0%, #15233C 100%);
      color: #FFFFFF;
      padding: 100px 0 120px 0;
      overflow: hidden;
    }
    .hero-bg-media {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.18;
      mix-blend-mode: overlay;
    }
    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-pill);
      padding: 6px 16px;
      font-size: 13px;
      color: #6EE7B7;
      margin-bottom: 24px;
    }
    .hero-h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.18;
      letter-spacing: -0.8px;
      margin-bottom: 20px;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-intro {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-proof-list {
      display: flex;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .proof-item {
      display: flex;
      flex-direction: column;
    }
    .proof-num {
      font-size: 26px;
      font-weight: 700;
      color: #FFFFFF;
      line-height: 1;
      margin-bottom: 4px;
    }
    .proof-text {
      font-size: 12px;
      color: #94A3B8;
    }

    .hero-visual-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 20px;
      backdrop-filter: blur(16px);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
    }
    .visual-screen-frame {
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
    }
    .visual-screen-frame img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .floating-data-card {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(15, 23, 42, 0.88);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 16px;
      display: flex;
      justify-content: space-around;
      align-items: center;
    }
    .float-stat-item {
      text-align: center;
    }
    .float-stat-label {
      font-size: 11px;
      color: #94A3B8;
      display: block;
    }
    .float-stat-val {
      font-size: 18px;
      font-weight: 700;
      color: #34D399;
    }

    /* 2. 品牌与方案架构区（#about） */
    .about-section {
      background-color: var(--bg-white);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .arch-specs {
      margin-top: 28px;
      display: grid;
      gap: 16px;
    }
    .spec-row {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 14px;
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary);
    }
    .spec-icon {
      width: 24px;
      height: 24px;
      color: var(--primary-dark);
      flex-shrink: 0;
      margin-top: 2px;
    }
    .spec-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-space);
      margin-bottom: 2px;
    }
    .spec-info p {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.5;
    }
    .arch-preview-wrap {
      position: relative;
    }
    .arch-img-frame {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .arch-badge-stamp {
      position: absolute;
      top: -16px;
      right: -16px;
      background: var(--dark-space);
      color: #F8FAFC;
      border: 2px solid var(--primary);
      border-radius: var(--radius-md);
      padding: 12px 18px;
      box-shadow: var(--shadow-md);
    }
    .stamp-title {
      font-size: 11px;
      color: #94A3B8;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .stamp-sub {
      font-size: 14px;
      font-weight: 700;
      color: #FFFFFF;
    }

    /* 3. 核心能力网格（#features） */
    .features-section {
      background-color: var(--bg-soft);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-dark);
    }
    .feature-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--dark-space);
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .feature-points {
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .f-point {
      font-size: 13px;
      color: var(--text-light);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .f-point::before {
      content: "";
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background-color: var(--primary);
    }

    /* 4. 热门智能硬件与平台（#products） */
    .products-section {
      background-color: var(--bg-white);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .product-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--bg-white);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      box-shadow: var(--shadow-xl);
      border-color: #BEE3D2;
    }
    .product-thumb {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-thumb img {
      transform: scale(1.04);
    }
    .product-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 23, 42, 0.8);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 500;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      backdrop-filter: blur(4px);
    }
    .product-body {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark-space);
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .product-specs-list {
      margin-top: auto;
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 13px;
      color: var(--dark-muted);
      margin-bottom: 20px;
    }
    .product-specs-list div {
      display: flex;
      justify-content: space-between;
      padding: 4px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .product-specs-list div:last-child {
      border-bottom: none;
    }
    .spec-k {
      color: var(--text-light);
    }

    /* 5. 场景化解决方案（#scenarios） */
    .scenarios-section {
      background-color: var(--dark-space);
      color: #FFFFFF;
      position: relative;
    }
    .scenarios-section .section-title {
      color: #FFFFFF;
    }
    .scenarios-section .section-desc {
      color: #94A3B8;
    }
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .scenario-card {
      background: #1E293B;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    }
    .sc-index {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      opacity: 0.8;
      line-height: 1;
      margin-bottom: 16px;
    }
    .sc-title {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .sc-body {
      font-size: 14px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .sc-feature-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }
    .sc-pill {
      font-size: 12px;
      color: #94A3B8;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 4px 10px;
      border-radius: var(--radius-pill);
    }

    /* 6. 深色案例与数据可视化（#cases） */
    .cases-section {
      background-color: #0B1120;
      color: #FFFFFF;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .cases-section .section-title {
      color: #FFFFFF;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .case-visual-board {
      background: #162032;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 16px;
      overflow: hidden;
    }
    .case-visual-board img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .case-content-tabs {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .case-block {
      background: rgba(30, 41, 59, 0.6);
      border-left: 4px solid var(--primary);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      padding: 20px 24px;
    }
    .case-block-title {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .case-block-text {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.65;
    }
    .case-metrics-badge {
      display: inline-flex;
      gap: 16px;
      margin-top: 10px;
      font-size: 12px;
      color: #34D399;
      font-weight: 600;
    }

    /* 7. 落地用户故事（#stories） */
    .stories-section {
      background-color: var(--bg-white);
    }
    .story-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 60px;
    }
    .story-item:last-child {
      margin-bottom: 0;
    }
    .story-item.reverse {
      direction: rtl;
    }
    .story-item.reverse .story-text {
      direction: ltr;
    }
    .story-media {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .story-media img {
      width: 100%;
      height: 340px;
      object-fit: cover;
    }
    .story-school-tag {
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 700;
      margin-bottom: 8px;
      display: block;
    }
    .story-h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--dark-space);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .story-p {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .story-quote {
      padding: 16px 20px;
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary);
      font-size: 14px;
      font-style: italic;
      color: var(--dark-navy);
      line-height: 1.6;
    }

    /* 8. 关键效能数据条（#metrics） */
    .metrics-section {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 64px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-cell {
      padding: 12px 16px;
      position: relative;
    }
    .metric-cell:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 20%;
      height: 60%;
      width: 1px;
      background: rgba(255, 255, 255, 0.12);
    }
    .metric-number {
      font-size: 46px;
      font-weight: 800;
      color: #34D399;
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }
    .metric-number span {
      font-size: 22px;
      font-weight: 600;
      margin-left: 2px;
    }
    .metric-title {
      font-size: 15px;
      color: #F8FAFC;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-subtitle {
      font-size: 12px;
      color: #94A3B8;
    }

    /* 9. 客户评价与同行口碑（#testimonials） */
    .testimonials-section {
      background-color: var(--bg-soft);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testi-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .testi-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .star-rating {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testi-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
      flex: 1;
    }
    .testi-profile {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
    }
    .profile-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      flex-shrink: 0;
    }
    .profile-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-space);
      line-height: 1.2;
    }
    .profile-role {
      font-size: 12px;
      color: var(--text-light);
      margin-top: 3px;
    }

    /* 10. 部署流程与套餐选型（#pricing） */
    .pricing-section {
      background-color: var(--bg-white);
    }
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      align-items: stretch;
    }
    .plan-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      background: var(--bg-white);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .plan-card.featured {
      border-color: var(--primary);
      box-shadow: 0 16px 36px -8px rgba(0, 181, 120, 0.18);
      transform: translateY(-8px);
    }
    .plan-badge-top {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: var(--radius-pill);
      letter-spacing: 0.5px;
    }
    .plan-name {
      font-size: 22px;
      font-weight: 800;
      color: var(--dark-space);
      margin-bottom: 8px;
    }
    .plan-desc {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 24px;
      min-height: 40px;
    }
    .plan-meta {
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      padding: 14px;
      margin-bottom: 24px;
    }
    .meta-row {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      padding: 4px 0;
    }
    .meta-row-k {
      color: var(--text-light);
    }
    .meta-row-v {
      font-weight: 600;
      color: var(--dark-space);
    }
    .plan-items {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 32px;
      flex: 1;
    }
    .plan-item {
      font-size: 14px;
      color: var(--dark-navy);
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .plan-item svg {
      width: 18px;
      height: 18px;
      fill: var(--primary);
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 11. 体育教育科研与前沿资讯（#news） */
    .news-section {
      background-color: var(--bg-soft);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .news-thumb {
      height: 180px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-info {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .news-h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--dark-space);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-snippet {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-badge {
      align-self: flex-start;
      margin-top: auto;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary-dark);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: var(--radius-pill);
    }

    /* 12. 常见问题手风琴（#faq） */
    .faq-section {
      background-color: var(--bg-white);
    }
    .faq-layout {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      max-width: 1100px;
      margin: 0 auto;
    }
    .faq-accordion {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
      background: var(--bg-white);
    }
    .faq-accordion:hover {
      border-color: #CBD5E1;
    }
    .faq-trigger {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      outline: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-space);
    }
    .faq-trigger svg {
      width: 20px;
      height: 20px;
      fill: var(--text-light);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      margin-left: 12px;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background-color: var(--bg-soft);
      border-top: 1px solid transparent;
    }
    .faq-content-inner {
      padding: 16px 24px 22px 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }
    .faq-accordion.active .faq-trigger svg {
      transform: rotate(180deg);
      fill: var(--primary);
    }
    .faq-accordion.active .faq-content {
      max-height: 260px;
      border-top-color: var(--border-light);
    }

    /* 13. 底部行动转化区（#cta） */
    .cta-section {
      position: relative;
      background: linear-gradient(135deg, #0F172A 0%, #162C3D 100%);
      color: #FFFFFF;
      padding: 88px 0;
      overflow: hidden;
    }
    .cta-container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .cta-text-area h2 {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .cta-text-area p {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .cta-points-row {
      display: flex;
      gap: 20px;
      font-size: 13px;
      color: #94A3B8;
    }
    .cta-points-row span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .cta-points-row span::before {
      content: "✓";
      color: #34D399;
      font-weight: bold;
    }

    .cta-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
      color: var(--dark-space);
    }
    .cta-form-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--dark-space);
    }
    .cta-form-subtitle {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 22px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-navy);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 8px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      background-color: var(--bg-soft);
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 181, 120, 0.15);
    }
    select.form-control {
      cursor: pointer;
    }
    .form-submit-btn {
      width: 100%;
      height: 48px;
      font-size: 16px;
      margin-top: 8px;
    }
    .form-hint {
      font-size: 12px;
      color: var(--text-light);
      text-align: center;
      margin-top: 12px;
    }

    /* 统一页脚 */
    .site-footer {
      background-color: #090E17;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 72px;
      padding-bottom: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 0.9fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-brand svg {
      width: 28px;
      height: 28px;
      fill: var(--primary);
    }
    .footer-about {
      font-size: 13px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }
    .footer-h4 {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 13px;
    }
    .footer-links a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 13px;
      line-height: 1.6;
    }
    .footer-contact-item strong {
      color: #E2E8F0;
      flex-shrink: 0;
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
    }
    .footer-bottom-links {
      display: flex;
      gap: 20px;
    }
    .footer-bottom-links a:hover {
      color: #94A3B8;
    }

    /* 移动端菜单抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: #FFFFFF;
      box-shadow: 0 16px 24px rgba(0, 0, 0, 0.1);
      padding: 20px 24px;
      z-index: 999;
      border-bottom: 1px solid var(--border-color);
    }
    .mobile-drawer.open {
      display: block;
    }
    .mobile-nav-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 20px;
    }
    .mobile-nav-link {
      font-size: 16px;
      font-weight: 600;
      color: var(--dark-space);
      padding: 8px 0;
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .about-grid, .cases-grid, .cta-container {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid, .products-grid, .scenarios-grid, .testimonials-grid, .pricing-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .metric-cell:nth-child(2)::after {
        display: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .hero-visual-card {
        order: -1;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav, .header-actions .btn {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .section-wrap {
        padding: 64px 0;
      }
      .hero-section {
        padding: 60px 0 80px 0;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .features-grid, .products-grid, .scenarios-grid, .testimonials-grid, .pricing-grid, .news-grid, .faq-layout {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-cell::after {
        display: none !important;
      }
      .story-item, .story-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 28px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .cta-form-box {
        padding: 24px;
      }
    }