/* roulang page: index */
:root {
      --primary: #0052D9;
      --primary-hover: #003cab;
      --accent-green: #00C58E;
      --accent-purple: #6366F1;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #F1F5F9;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --gradient-primary: linear-gradient(135deg, #0052D9 0%, #6366F1 100%);
      --gradient-badge: linear-gradient(135deg, rgba(0, 82, 217, 0.1) 0%, rgba(99, 102, 241, 0.15) 100%);
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(0, 82, 217, 0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

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

    body {
      font-family: var(--font-sans);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--bg-dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-tags {
      display: flex;
      gap: 16px;
    }
    .top-bar-tags span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }
    .top-bar-tags span::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-green);
    }

    .main-nav {
      padding: 14px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-mark {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-md);
      background: var(--gradient-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.5px;
      box-shadow: 0 4px 12px rgba(0, 82, 217, 0.3);
    }
    .logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--bg-dark);
      letter-spacing: -0.5px;
    }
    .logo-sub {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 600;
      display: block;
      line-height: 1;
      margin-top: 2px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after, .nav-link:hover::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
      white-space: nowrap;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--gradient-primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(0, 82, 217, 0.25);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(0, 82, 217, 0.4);
      transform: translateY(-2px);
      color: #FFFFFF;
    }
    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-main);
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background: #F1F5F9;
      border-color: #CBD5E1;
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent-green);
      color: #064E3B;
      font-weight: 700;
    }
    .btn-accent:hover {
      background: #00ad7c;
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: all 0.3s;
    }

    /* 区域通用样式 */
    .section-wrap {
      padding: 88px 0;
      position: relative;
    }
    .section-header {
      max-width: 800px;
      margin: 0 auto 52px;
      text-align: center;
    }
    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 14px;
      background: var(--gradient-badge);
      color: var(--primary);
      border: 1px solid rgba(0, 82, 217, 0.15);
    }
    .badge-pill.dark-badge {
      background: rgba(0, 197, 142, 0.12);
      color: var(--accent-green);
      border-color: rgba(0, 197, 142, 0.25);
    }
    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-green);
      display: inline-block;
      box-shadow: 0 0 8px var(--accent-green);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 区域：自测选型问卷与全自主预览 */
    .hero-section {
      background: linear-gradient(180deg, #F0F5FF 0%, #F8FAFC 100%);
      padding: 60px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-visual {
      position: absolute;
      top: 0;
      right: 0;
      width: 50%;
      height: 100%;
      background-image: url('/assets/images/8c9d6a9a203ca0f1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.18;
      letter-spacing: -1px;
      margin-bottom: 20px;
      color: var(--bg-dark);
    }
    .hero-content h1 span {
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.125rem;
      color: #475569;
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-meta-points {
      display: flex;
      gap: 24px;
      border-top: 1px solid rgba(226, 232, 240, 0.8);
      padding-top: 24px;
    }
    .hero-meta-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      color: #334155;
      font-weight: 600;
    }

    /* Hero 右侧测评选型卡片 */
    .quiz-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid #E2E8F0;
      padding: 32px;
      box-shadow: 0 16px 36px -6px rgba(0, 82, 217, 0.08);
      position: relative;
    }
    .quiz-card-header {
      margin-bottom: 20px;
    }
    .quiz-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--bg-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .quiz-step {
      font-size: 0.75rem;
      background: #EEF2FF;
      color: var(--primary);
      padding: 4px 10px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }
    .quiz-form-group {
      margin-bottom: 16px;
    }
    .quiz-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: #334155;
    }
    .quiz-select, .quiz-input {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border-radius: var(--radius-md);
      border: 1px solid #CBD5E1;
      font-size: 0.9375rem;
      background: #F8FAFC;
      color: var(--text-main);
      transition: border-color 0.2s;
    }
    .quiz-select:focus, .quiz-input:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }
    .quiz-result-box {
      background: #F1F5F9;
      border-radius: var(--radius-md);
      padding: 14px;
      margin: 18px 0;
      border-left: 4px solid var(--accent-green);
    }
    .quiz-result-title {
      font-size: 0.8125rem;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .quiz-result-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 2. 指标看板条 Metrics */
    .metrics-bar {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 36px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-item {
      padding: 12px 20px;
      border-right: 1px solid var(--border-color);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-val {
      font-family: var(--font-mono);
      font-size: 2.375rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-unit {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-muted);
    }
    .metric-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 3. 架构与飞控介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .intro-media img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .spec-sheet-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(15, 23, 42, 0.9);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 14px 18px;
      color: #FFFFFF;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .spec-item {
      font-size: 0.75rem;
    }
    .spec-item strong {
      display: block;
      font-size: 0.9375rem;
      color: var(--accent-green);
    }
    .intro-checklist {
      list-style: none;
      margin: 24px 0 32px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .intro-checklist li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.9375rem;
      color: #334155;
    }
    .chk-icon {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #EEF2FF;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.75rem;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 4. 核心优势 6卡片 */
    .core-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .card-box:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .card-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: #EEF2FF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.125rem;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .card-box:nth-child(2n) .card-icon-wrap {
      background: #ECFDF5;
      color: #059669;
    }
    .card-box:nth-child(3n) .card-icon-wrap {
      background: #F5F3FF;
      color: #7C3AED;
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
    }
    .card-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .card-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(0, 82, 217, 0.06);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      display: inline-block;
      align-self: flex-start;
    }

    /* 5. 软硬一体产品矩阵 3卡片 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .product-img-box {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .product-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-box img {
      transform: scale(1.05);
    }
    .product-badge-float {
      position: absolute;
      top: 14px;
      right: 14px;
      background: rgba(15, 23, 42, 0.85);
      color: #FFFFFF;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      backdrop-filter: blur(4px);
      font-weight: 600;
    }
    .product-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 8px;
    }
    .product-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .param-list {
      list-style: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      margin-top: auto;
      margin-bottom: 20px;
    }
    .param-item {
      display: flex;
      justify-content: space-between;
      font-size: 0.8125rem;
      padding: 4px 0;
      color: #475569;
    }
    .param-item span:last-child {
      font-weight: 600;
      color: var(--text-main);
    }

    /* 6. 深色模式架构区 */
    .dark-concept-section {
      background: var(--bg-dark);
      color: #FFFFFF;
      padding: 96px 0;
      position: relative;
    }
    .dark-header .section-title {
      color: #FFFFFF;
    }
    .dark-header .section-desc {
      color: #94A3B8;
    }
    .dark-arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .dark-box {
      background: var(--bg-dark-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-dark);
      padding: 32px;
    }
    .dark-box-title {
      font-size: 1.375rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .dark-box-p {
      font-size: 0.9375rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .pipeline-step {
      display: flex;
      gap: 16px;
      margin-bottom: 16px;
      background: rgba(15, 23, 42, 0.6);
      padding: 14px;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--primary);
    }
    .pipeline-step:nth-child(2) {
      border-left-color: var(--accent-green);
    }
    .pipeline-step:nth-child(3) {
      border-left-color: var(--accent-purple);
    }
    .pipe-num {
      font-family: var(--font-mono);
      font-weight: 800;
      color: #64748B;
      font-size: 1.125rem;
    }
    .pipe-body h4 {
      font-size: 0.9375rem;
      color: #F8FAFC;
      margin-bottom: 4px;
    }
    .pipe-body p {
      font-size: 0.8125rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 7. 效能结果对比板块 */
    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-row {
      display: grid;
      grid-template-columns: 2fr 3fr 3fr;
      padding: 18px 28px;
      border-bottom: 1px solid var(--border-color);
      align-items: center;
    }
    .compare-row:last-child {
      border-bottom: none;
    }
    .compare-row.head-row {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--bg-dark);
      font-size: 0.9375rem;
    }
    .dim-name {
      font-weight: 600;
      color: var(--text-main);
      font-size: 0.9375rem;
    }
    .trad-cell {
      color: #64748B;
      font-size: 0.875rem;
      padding-right: 14px;
    }
    .ai-cell {
      color: var(--primary);
      font-weight: 600;
      font-size: 0.875rem;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .ai-cell::before {
      content: "✓";
      color: var(--accent-green);
      font-weight: 900;
    }

    /* 8. 典型用户实景案例 */
    .story-card-wrapper {
      display: flex;
      flex-direction: column;
      gap: 36px;
    }
    .story-card {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .story-card.reverse {
      grid-template-columns: 0.9fr 1.1fr;
    }
    .story-img {
      height: 340px;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-body {
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .story-title {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--bg-dark);
    }
    .story-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .story-metrics-mini {
      display: flex;
      gap: 24px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .s-metric strong {
      display: block;
      font-size: 1.25rem;
      color: var(--primary);
      font-family: var(--font-mono);
    }
    .s-metric span {
      font-size: 0.75rem;
      color: #64748B;
    }

    /* 9. 里程碑时间线 */
    .timeline-container {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }
    .timeline-container::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }
    .timeline-item {
      display: flex;
      justify-content: flex-end;
      padding-right: 50px;
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }
    .timeline-item:nth-child(even) {
      align-self: flex-end;
      margin-left: 50%;
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 50px;
    }
    .timeline-dot {
      position: absolute;
      top: 16px;
      right: -9px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 4px solid var(--primary);
      z-index: 2;
    }
    .timeline-item:nth-child(even) .timeline-dot {
      right: auto;
      left: -8px;
    }
    .timeline-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      width: 100%;
    }
    .timeline-date {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .timeline-title {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--bg-dark);
    }
    .timeline-text {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 10. 评价反馈 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testimonial-content {
      font-size: 0.9375rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #EEF2FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.875rem;
    }
    .author-info h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--bg-dark);
    }
    .author-info p {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 11. 资讯动态摘要 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-cover {
      height: 180px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .news-card:hover .news-cover img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-action {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--bg-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      list-style: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon-arr {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    details[open] .faq-icon-arr {
      transform: rotate(180deg);
      background: var(--primary);
      color: #FFFFFF;
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 0.9375rem;
      color: #475569;
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    /* 13. 底部转化表单区 */
    .cta-form-section {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 96px 0;
    }
    .cta-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 52px;
      align-items: center;
    }
    .cta-info h2 {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .cta-info p {
      font-size: 1.0625rem;
      color: #94A3B8;
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .cta-features-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-feat-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9375rem;
      color: #CBD5E1;
    }
    .cta-feat-item span {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-green);
    }
    .cta-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      color: var(--text-main);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    }
    .cta-card-title {
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 8px;
    }
    .cta-card-sub {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      height: 46px;
      padding: 0 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.9375rem;
      background: #F8FAFC;
      transition: all 0.25s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
    }
    .form-submit-btn {
      width: 100%;
      height: 48px;
      margin-top: 10px;
    }

    /* 页脚 Footer */
    .site-footer {
      background: #0B1120;
      color: #64748B;
      padding: 64px 0 28px;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 18px;
      color: #94A3B8;
    }
    .footer-col h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .contact-line {
      margin-bottom: 8px;
      color: #94A3B8;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
      .core-cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .products-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-arch-grid {
        grid-template-columns: 1fr;
      }
      .cta-form-grid {
        grid-template-columns: 1fr;
      }
      .story-card, .story-card.reverse {
        grid-template-columns: 1fr;
      }
      .story-img {
        height: 240px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        gap: 16px;
        display: none;
        border-top: 1px solid var(--border-color);
      }
      .nav-menu.show {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .hero-content h1 {
        font-size: 2.25rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .core-cards-grid {
        grid-template-columns: 1fr;
      }
      .products-grid {
        grid-template-columns: 1fr;
      }
      .testimonials-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .timeline-container::before {
        left: 20px;
      }
      .timeline-item, .timeline-item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        padding-left: 48px;
        padding-right: 0;
        justify-content: flex-start;
      }
      .timeline-dot, .timeline-item:nth-child(even) .timeline-dot {
        left: 12px;
        right: auto;
      }
      .compare-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }