/* roulang page: index */
:root {
      --bg-canvas: #0b0f19;
      --bg-card: #131b2e;
      --bg-card-hover: #1c2742;
      --bg-deep: #070a10;
      --brand-primary: #10b981;
      --brand-primary-glow: rgba(16, 185, 129, 0.25);
      --brand-accent: #6366f1;
      --brand-accent-glow: rgba(99, 102, 241, 0.2);
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(16, 185, 129, 0.4);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition-base: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      --container-max: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-canvas);
      color: var(--text-main);
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.7;
      letter-spacing: 0.02em;
      overflow-x: hidden;
      background-color: var(--bg-canvas);
      -webkit-font-smoothing: antialiased;
    }

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

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

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

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

    /* 顶部双行导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 15, 25, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--bg-deep);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-bar-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      background-color: var(--brand-primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--brand-primary);
    }

    .top-bar-contact {
      display: flex;
      gap: 18px;
    }

    .top-bar-contact a:hover {
      color: var(--brand-primary);
    }

    .main-nav {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      letter-spacing: -0.01em;
      color: #fff;
    }

    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 16px var(--brand-primary-glow);
    }

    .brand-logo-icon svg {
      width: 18px;
      height: 18px;
      fill: #fff;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 4px 0;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
    }

    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--brand-primary);
      border-radius: 2px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition-base);
      border: 1px solid transparent;
      white-space: nowrap;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #04130d;
      box-shadow: 0 4px 18px var(--brand-primary-glow);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 24px rgba(16, 185, 129, 0.4);
      transform: translateY(-1px);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .btn-lg {
      padding: 14px 28px;
      font-size: 15px;
    }

    .btn-block {
      width: 100%;
    }

    /* 移动端菜单控制按钮 */
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-main);
      padding: 6px;
      cursor: pointer;
    }

    .menu-toggle svg {
      width: 24px;
      height: 24px;
      stroke: currentColor;
    }

    /* 布局板块基础定义 */
    .section-block {
      padding: 96px 0;
      position: relative;
    }

    .section-block:nth-child(even) {
      background-color: var(--bg-deep);
    }

    .section-header {
      margin-bottom: 56px;
      max-width: 820px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--brand-primary);
      margin-bottom: 12px;
      padding: 4px 10px;
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.2);
      border-radius: var(--radius-sm);
    }

    .section-title {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #fff;
      margin-bottom: 16px;
    }

    .section-intro {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 1. Hero 落地页强转化首屏 */
    .hero-section {
      padding: 80px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 60%),
                  radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.12) 0%, transparent 50%),
                  var(--bg-canvas);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 56px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 700;
      letter-spacing: -0.025em;
      color: #fff;
      margin-bottom: 22px;
    }

    .hero-content h1 span {
      background: linear-gradient(135deg, #10b981 0%, #38bdf8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 30px;
    }

    .hero-points {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-bottom: 36px;
    }

    .hero-points li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hero-points li svg {
      width: 18px;
      height: 18px;
      fill: var(--brand-primary);
      flex-shrink: 0;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 28px;
    }

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
    }

    .hero-trust-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .hero-visual {
      position: relative;
    }

    .hero-poster-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 12px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
      position: relative;
      overflow: hidden;
    }

    .hero-poster-card img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      display: block;
      object-fit: cover;
    }

    .hero-floating-badge {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(16, 185, 129, 0.3);
      padding: 14px 18px;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .floating-info-label {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .floating-info-val {
      font-size: 14px;
      font-weight: 700;
      color: var(--brand-primary);
    }

    /* 2. 倒计时与实时调度看板区 */
    .sync-counter-strip {
      background: linear-gradient(90deg, #0d1527 0%, #111e38 50%, #0d1527 100%);
      border-bottom: 1px solid var(--border-color);
      padding: 24px 0;
    }

    .counter-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
    }

    .counter-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .counter-pulse-dot {
      width: 10px;
      height: 10px;
      background-color: var(--brand-primary);
      border-radius: 50%;
      animation: pulse 1.6s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
      70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    .counter-digits-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .countdown-unit {
      background: rgba(0, 0, 0, 0.35);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 14px;
      text-align: center;
    }

    .countdown-unit .num {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      font-variant-numeric: tabular-nums;
    }

    .countdown-unit .txt {
      font-size: 10px;
      color: var(--text-muted);
      text-transform: uppercase;
    }

    /* 3. 核心指标看板区 (#metrics) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
      transition: var(--transition-base);
    }

    .metric-card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px -10px var(--brand-primary-glow);
    }

    .metric-value {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.1;
      color: #fff;
      margin-bottom: 8px;
      letter-spacing: -0.03em;
    }

    .metric-value small {
      font-size: 18px;
      color: var(--brand-primary);
      margin-left: 2px;
    }

    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .metric-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 产品与服务矩阵区 (#services) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      transition: var(--transition-base);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-box:hover {
      border-color: rgba(99, 102, 241, 0.4);
      background: var(--bg-card-hover);
      transform: translateY(-3px);
    }

    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(99, 102, 241, 0.12);
      border: 1px solid rgba(99, 102, 241, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: #818cf8;
    }

    .service-box h3 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 700;
    }

    .service-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .service-tag-item {
      font-size: 11px;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.04);
      color: #cbd5e1;
    }

    /* 5. 核心优势板块 (#advantages) */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .advantage-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      position: relative;
    }

    .advantage-num {
      font-size: 13px;
      font-weight: 700;
      color: var(--brand-primary);
      margin-bottom: 10px;
    }

    .advantage-card h4 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 10px;
    }

    .advantage-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 6. 技术结果对比区 (#benchmark) */
    .benchmark-table-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 680px;
    }

    .benchmark-table th, 
    .benchmark-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }

    .benchmark-table th {
      background: rgba(255, 255, 255, 0.02);
      color: var(--text-muted);
      font-weight: 600;
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }

    .benchmark-table tr:last-child td {
      border-bottom: none;
    }

    .col-highlight {
      background: rgba(16, 185, 129, 0.04);
      color: #fff;
      font-weight: 600;
      border-left: 1px solid rgba(16, 185, 129, 0.2);
      border-right: 1px solid rgba(16, 185, 129, 0.2);
    }

    .badge-win {
      display: inline-flex;
      align-items: center;
      padding: 2px 8px;
      font-size: 11px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--brand-primary);
      border-radius: 4px;
      margin-left: 8px;
    }

    /* 7. 热门产品体系区 (#solutions) */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .solution-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .solution-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-bottom: 1px solid var(--border-color);
    }

    .solution-card-body {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .solution-card-body h3 {
      font-size: 19px;
      color: #fff;
      margin-bottom: 12px;
    }

    .solution-card-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    /* 8. 架构与合规安全区 (#deep-tech) */
    .deep-tech-box {
      background: #05080e;
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .deep-tech-info h3 {
      font-size: 26px;
      color: #fff;
      margin-bottom: 16px;
    }

    .deep-tech-info p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .security-specs-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .spec-item {
      background: rgba(255, 255, 255, 0.03);
      border-left: 2px solid var(--brand-accent);
      padding: 12px 14px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }

    .spec-item .title {
      font-size: 13px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 4px;
    }

    .spec-item .desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    .code-mockup-wrapper {
      background: #090e18;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 12px;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
    }

    .code-mockup-header {
      background: rgba(255, 255, 255, 0.04);
      padding: 10px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
    }

    .mockup-dots {
      display: flex;
      gap: 6px;
    }

    .mockup-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #334155;
    }

    .mockup-dot:nth-child(1) { background: #ef4444; }
    .mockup-dot:nth-child(2) { background: #f59e0b; }
    .mockup-dot:nth-child(3) { background: #10b981; }

    .code-mockup-body {
      padding: 20px;
      color: #94a3b8;
      line-height: 1.8;
      overflow-x: auto;
    }

    .code-mockup-body .token-kw { color: #f43f5e; }
    .code-mockup-body .token-fn { color: #38bdf8; }
    .code-mockup-body .token-str { color: #34d399; }
    .code-mockup-body .token-num { color: #fbbf24; }

    /* 9. 真实落地故事与实践案例 (#stories) */
    .story-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }

    .story-block:last-child {
      margin-bottom: 0;
    }

    .story-block.reversed {
      direction: rtl;
    }

    .story-block.reversed .story-content {
      direction: ltr;
    }

    .story-media {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    }

    .story-media img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    .story-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: var(--brand-accent);
      margin-bottom: 12px;
    }

    .story-content h3 {
      font-size: 24px;
      color: #fff;
      margin-bottom: 14px;
    }

    .story-content p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .story-stats {
      display: flex;
      gap: 32px;
    }

    .stat-pill .val {
      font-size: 22px;
      font-weight: 700;
      color: #fff;
    }

    .stat-pill .lbl {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 演进与版本里程碑 (#milestones) */
    .timeline-container {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
    }

    .timeline-container::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      margin-bottom: 48px;
      width: 50%;
      padding: 0 40px;
    }

    .timeline-item:nth-child(odd) {
      left: 0;
      text-align: right;
    }

    .timeline-item:nth-child(even) {
      left: 50%;
      text-align: left;
    }

    .timeline-dot {
      position: absolute;
      top: 10px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--brand-primary);
      box-shadow: 0 0 10px var(--brand-primary);
    }

    .timeline-item:nth-child(odd) .timeline-dot {
      right: -7px;
    }

    .timeline-item:nth-child(even) .timeline-dot {
      left: -7px;
    }

    .timeline-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .timeline-card .date {
      font-size: 12px;
      font-weight: 700;
      color: var(--brand-primary);
      margin-bottom: 6px;
    }

    .timeline-card h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 8px;
    }

    .timeline-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. 客户背书与审计反馈 (#testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-stars {
      color: #fbbf24;
      font-size: 14px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 18px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--brand-primary);
      font-size: 14px;
      border: 1px solid var(--border-color);
    }

    .author-info .name {
      font-size: 14px;
      font-weight: 600;
      color: #fff;
    }

    .author-info .role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 12. 行业动态与技术资讯 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-card-img {
      height: 180px;
      position: relative;
    }

    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .news-card-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .news-card-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .news-card-content h3 {
      font-size: 17px;
      line-height: 1.4;
      color: #fff;
      margin-bottom: 12px;
    }

    .news-card-content p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .news-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 13. 快速解答与常见问题 (#faq) */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      user-select: none;
      transition: var(--transition-base);
    }

    .faq-question:hover {
      background: rgba(255, 255, 255, 0.02);
    }

    .faq-icon {
      font-size: 18px;
      color: var(--brand-primary);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: rgba(0, 0, 0, 0.2);
    }

    .faq-answer-inner {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 14. 转化行动区与接入表单 (#cta) */
    .cta-panel {
      background: radial-gradient(circle at 10% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                  radial-gradient(circle at 90% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                  #070c16;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .cta-info h2 {
      font-size: 32px;
      line-height: 1.3;
      color: #fff;
      margin-bottom: 18px;
    }

    .cta-info p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 28px;
    }

    .cta-guarantee-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
      color: #cbd5e1;
    }

    .cta-guarantee-list li {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .cta-guarantee-list li svg {
      width: 16px;
      height: 16px;
      fill: var(--brand-primary);
      flex-shrink: 0;
    }

    .cta-form {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-main);
      margin-bottom: 8px;
      font-weight: 500;
    }

    .form-control {
      width: 100%;
      background: rgba(0, 0, 0, 0.35);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: var(--transition-base);
    }

    .form-control:focus {
      border-color: var(--brand-primary);
      box-shadow: 0 0 0 2px var(--brand-primary-glow);
    }

    .form-grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    /* 页脚系统 */
    .site-footer {
      background-color: var(--bg-deep);
      border-top: 1px solid var(--border-color);
      padding: 80px 0 32px;
    }

    .footer-columns {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 64px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 22px;
      letter-spacing: -0.01em;
    }

    .footer-col p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-nav-list a {
      font-size: 13.5px;
      color: var(--text-muted);
    }

    .footer-nav-list a:hover {
      color: #fff;
      padding-left: 4px;
    }

    .footer-contact-item {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 32px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 12.5px;
      color: #64748b;
    }

    .footer-legal-links {
      display: flex;
      gap: 18px;
    }

    .footer-legal-links a:hover {
      color: var(--text-muted);
    }

    /* 响应式断点定义 */
    @media (max-width: 1024px) {
      .hero-grid,
      .deep-tech-box,
      .cta-panel {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid,
      .advantages-grid,
      .solutions-grid,
      .news-grid,
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-columns {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0b0f19;
        flex-direction: column;
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .hero-section {
        padding: 48px 0 64px;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .hero-points {
        grid-template-columns: 1fr;
      }
      .services-grid,
      .advantages-grid,
      .solutions-grid,
      .news-grid,
      .testimonials-grid {
        grid-template-columns: 1fr;
      }
      .story-block,
      .story-block.reversed {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 28px;
      }
      .timeline-container::before {
        left: 20px;
      }
      .timeline-item,
      .timeline-item:nth-child(even),
      .timeline-item:nth-child(odd) {
        width: 100%;
        left: 0;
        padding-left: 48px;
        padding-right: 0;
        text-align: left;
      }
      .timeline-dot,
      .timeline-item:nth-child(odd) .timeline-dot,
      .timeline-item:nth-child(even) .timeline-dot {
        left: 14px;
        right: auto;
      }
      .cta-panel {
        padding: 32px 20px;
      }
      .form-grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-columns {
        grid-template-columns: 1fr;
      }
    }