/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --bg-dark-alt: #0d1527;
      --bg-card: rgba(255, 255, 255, 0.04);
      --bg-card-hover: rgba(255, 255, 255, 0.07);
      --border-glow: rgba(0, 240, 255, 0.18);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --primary-cyan: #00f0ff;
      --primary-blue: #2563eb;
      --text-main: #ffffff;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --accent-green: #10b981;
      --accent-purple: #8b5cf6;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.28);
      --shadow-blue: 0 10px 30px -10px rgba(37, 99, 235, 0.4);
      --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(37, 99, 235, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 75%, rgba(0, 240, 255, 0.08) 0%, transparent 45%);
      color: var(--text-muted);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.68;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部服务信任条 */
    .top-bar {
      background: rgba(10, 15, 29, 0.85);
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.8125rem;
      padding: 8px 0;
      backdrop-filter: blur(10px);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-meta {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-cyan);
    }
    .top-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary-cyan);
      box-shadow: 0 0 8px var(--primary-cyan);
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 21, 39, 0.8);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-subtle);
      transition: var(--transition-smooth);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-symbol {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
      color: #fff;
      font-weight: 800;
      font-size: 1.15rem;
    }
    .logo-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .logo-title span {
      color: var(--primary-cyan);
      font-size: 0.85rem;
      margin-left: 6px;
      font-weight: 500;
      padding: 2px 8px;
      background: rgba(0, 240, 255, 0.1);
      border-radius: 4px;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      color: var(--text-muted);
      font-size: 0.9375rem;
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--text-main);
    }
    .nav-link:hover::after, .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
      border-radius: 2px;
    }
    .nav-cta {
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--primary-blue), #1e40af);
      color: #fff;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid rgba(0, 240, 255, 0.4);
      box-shadow: var(--shadow-glow);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .nav-cta:hover {
      background: linear-gradient(135deg, #3b82f6, var(--primary-blue));
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
      transform: translateY(-2px);
      color: #fff;
    }

    /* 通用板块与排版 */
    .section-spacing {
      padding: 96px 0;
      position: relative;
    }
    .section-spacing-alt {
      background: rgba(13, 21, 39, 0.55);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-header {
      max-width: 820px;
      margin: 0 auto 56px auto;
      text-align: center;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 0.8125rem;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--primary-cyan);
      background: rgba(0, 240, 255, 0.08);
      padding: 4px 14px;
      border-radius: 20px;
      border: 1px solid rgba(0, 240, 255, 0.2);
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 2.35rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 18px;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      backdrop-filter: blur(14px);
      transition: var(--transition-smooth);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-glow);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -12px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 240, 255, 0.15);
    }

    /* 1. 首屏 Banner (#hero) */
    .hero-section {
      position: relative;
      padding: 100px 0 120px 0;
      background-position: center;
      background-size: cover;
      background-repeat: no-repeat;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 15, 29, 0.88) 0%, rgba(10, 15, 29, 0.95) 75%, var(--bg-dark) 100%);
      pointer-events: none;
    }
    .hero-content-wrap {
      position: relative;
      z-index: 2;
    }
    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 6px 18px;
      border-radius: 30px;
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.3);
      color: var(--primary-cyan);
      font-size: 0.875rem;
      margin-bottom: 24px;
    }
    .hero-h1 {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.2;
      color: #fff;
      margin-bottom: 24px;
      letter-spacing: -0.03em;
    }
    .hero-h1 .gradient-text {
      background: linear-gradient(90deg, #ffffff 0%, var(--primary-cyan) 60%, #60a5fa 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.18rem;
      color: #cbd5e1;
      max-width: 860px;
      margin-bottom: 38px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-primary {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #030712;
      background: var(--primary-cyan);
      border: 1px solid #67e8f9;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.45);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: #38bdf8;
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-secondary {
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.25);
    }
    /* 旗舰店系列导航条叠放在大图下部 */
    .hero-flagship-shelf {
      background: rgba(13, 21, 39, 0.75);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      backdrop-filter: blur(20px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .flagship-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 8px 12px;
      border-right: 1px solid var(--border-subtle);
    }
    .flagship-item:last-child {
      border-right: none;
    }
    .flagship-icon {
      font-size: 1.6rem;
      color: var(--primary-cyan);
    }
    .flagship-label {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }
    .flagship-val {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
    }

    /* 2. 能力矩阵 (#matrix) */
    .matrix-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .matrix-spec-card {
      padding: 36px;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0%, rgba(37, 99, 235, 0.08) 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
    }
    .matrix-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .matrix-desc {
      color: #cbd5e1;
      margin-bottom: 24px;
      font-size: 0.975rem;
      line-height: 1.75;
    }
    .matrix-spec-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 24px;
    }
    .spec-tag {
      padding: 6px 14px;
      border-radius: 6px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.25);
      color: var(--primary-cyan);
      font-size: 0.85rem;
      font-weight: 600;
    }
    .matrix-feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .matrix-feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
      color: #e2e8f0;
    }
    .matrix-feature-list li span.dot {
      width: 8px;
      height: 8px;
      margin-top: 7px;
      background: var(--primary-cyan);
      border-radius: 50%;
      flex-shrink: 0;
      box-shadow: 0 0 8px var(--primary-cyan);
    }
    .matrix-visual-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      position: relative;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }
    .matrix-visual-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .matrix-visual-box:hover img {
      transform: scale(1.03);
    }

    /* 3. 核心优势六宫格 (#features) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-icon-bar {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(37, 99, 235, 0.2));
      border: 1px solid rgba(0, 240, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-cyan);
      font-size: 1.3rem;
    }
    .feature-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .feature-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.68;
    }

    /* 4. 垂直大模型矩阵 (#products) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      border-top: 3px solid var(--primary-blue);
    }
    .product-card.highlight {
      border-top-color: var(--primary-cyan);
      background: linear-gradient(180deg, rgba(0, 240, 255, 0.05) 0%, rgba(255, 255, 255, 0.03) 100%);
    }
    .product-head {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 16px;
    }
    .product-version {
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.08);
      color: #cbd5e1;
    }
    .product-title {
      font-size: 1.45rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .product-meta-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 50px;
    }
    .product-metrics {
      display: flex;
      justify-content: space-between;
      padding: 14px 16px;
      background: rgba(0, 0, 0, 0.25);
      border-radius: var(--radius-sm);
      margin-bottom: 24px;
      border: 1px solid var(--border-subtle);
    }
    .p-metric-item {
      text-align: center;
    }
    .p-metric-label {
      font-size: 0.75rem;
      color: var(--text-dim);
    }
    .p-metric-val {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary-cyan);
    }
    .product-items {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .product-items li {
      font-size: 0.875rem;
      color: #cbd5e1;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-items li::before {
      content: "✓";
      color: var(--primary-cyan);
      font-weight: bold;
    }
    .btn-card {
      display: block;
      text-align: center;
      padding: 12px;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.06);
      color: #fff;
      font-weight: 600;
      font-size: 0.9rem;
      border: 1px solid var(--border-subtle);
    }
    .btn-card:hover {
      background: var(--primary-blue);
      border-color: var(--primary-blue);
    }

    /* 5. 沉浸式技术架构理念 (#technology) */
    .tech-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .tech-step-item {
      position: relative;
      padding-left: 36px;
      margin-bottom: 32px;
    }
    .tech-step-item::before {
      content: "";
      position: absolute;
      left: 0;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary-cyan);
      box-shadow: 0 0 12px var(--primary-cyan);
    }
    .tech-step-item::after {
      content: "";
      position: absolute;
      left: 6px;
      top: 24px;
      width: 2px;
      height: calc(100% - 10px);
      background: var(--border-subtle);
    }
    .tech-step-item:last-child::after {
      display: none;
    }
    .tech-step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
    }
    .tech-step-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
    }
    .tech-code-panel {
      background: #060913;
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }
    .code-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-subtle);
      padding-bottom: 12px;
      margin-bottom: 16px;
      font-size: 0.8rem;
      color: var(--text-dim);
    }
    .code-dots {
      display: flex;
      gap: 6px;
    }
    .code-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #334155;
    }
    .code-line {
      display: flex;
      gap: 12px;
      font-size: 0.85rem;
      line-height: 1.7;
    }
    .line-no {
      color: #475569;
      user-select: none;
      width: 20px;
      text-align: right;
    }
    .line-text {
      color: #38bdf8;
    }
    .line-text.kwd { color: #f43f5e; }
    .line-text.str { color: #a3e635; }
    .line-text.cmt { color: #64748b; }

    /* 6. 指标看板 (#metrics) */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-box {
      padding: 32px 24px;
      text-align: center;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      position: relative;
    }
    .metric-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 40px;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
    }
    .metric-number {
      font-size: 3rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.1;
      margin-bottom: 8px;
      font-variant-numeric: tabular-nums;
    }
    .metric-unit {
      font-size: 1.25rem;
      color: var(--primary-cyan);
      margin-left: 2px;
      font-weight: 600;
    }
    .metric-name {
      font-size: 1rem;
      font-weight: 600;
      color: #e2e8f0;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 7. 落地效果对比 (#comparison) */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .compare-col {
      border-radius: var(--radius-lg);
      padding: 36px 32px;
    }
    .compare-col.legacy {
      background: rgba(239, 68, 68, 0.03);
      border: 1px solid rgba(239, 68, 68, 0.2);
    }
    .compare-col.advanced {
      background: rgba(0, 240, 255, 0.04);
      border: 1px solid rgba(0, 240, 255, 0.35);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.08);
    }
    .compare-badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .compare-col.legacy .compare-badge {
      background: rgba(239, 68, 68, 0.15);
      color: #fca5a5;
    }
    .compare-col.advanced .compare-badge {
      background: rgba(0, 240, 255, 0.15);
      color: var(--primary-cyan);
    }
    .compare-col-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 24px;
    }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .compare-list li {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      font-size: 0.95rem;
      line-height: 1.6;
    }
    .compare-col.legacy .compare-list li {
      color: #94a3b8;
    }
    .compare-col.advanced .compare-list li {
      color: #f1f5f9;
    }
    .compare-icon {
      font-size: 1.1rem;
      line-height: 1;
      margin-top: 3px;
    }

    /* 8. 标杆客户故事与落地场景 (#scenarios) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .scenario-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .scenario-pill {
      font-size: 0.75rem;
      color: var(--primary-cyan);
      margin-bottom: 8px;
      font-weight: 600;
      letter-spacing: 0.05em;
    }
    .scenario-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .scenario-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .scenario-result-stat {
      padding: 10px 14px;
      background: rgba(255, 255, 255, 0.03);
      border-radius: 6px;
      border-left: 3px solid var(--primary-cyan);
      font-size: 0.825rem;
      color: #cbd5e1;
    }

    /* 9. 客户信任与企业口碑 (#testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .quote-mark {
      font-size: 2.4rem;
      color: var(--primary-cyan);
      line-height: 1;
      opacity: 0.4;
      margin-bottom: 12px;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testimonial-client {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-subtle);
      padding-top: 18px;
    }
    .client-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, #1e293b, #334155);
      border: 1px solid var(--border-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary-cyan);
    }
    .client-info-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
    }
    .client-info-post {
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* 10. 发展里程碑 (#milestones) */
    .milestones-timeline {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px 0;
    }
    .milestones-timeline::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: linear-gradient(180deg, var(--primary-cyan) 0%, var(--primary-blue) 100%);
      transform: translateX(-50%);
    }
    .timeline-node {
      position: relative;
      width: 50%;
      padding: 20px 40px;
    }
    .timeline-node.left {
      left: 0;
      text-align: right;
    }
    .timeline-node.right {
      left: 50%;
      text-align: left;
    }
    .timeline-dot {
      position: absolute;
      top: 28px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #030712;
      border: 3px solid var(--primary-cyan);
      box-shadow: 0 0 12px var(--primary-cyan);
    }
    .timeline-node.left .timeline-dot {
      right: -8px;
    }
    .timeline-node.right .timeline-dot {
      left: -8px;
    }
    .timeline-date {
      font-size: 0.85rem;
      color: var(--primary-cyan);
      font-weight: 700;
      margin-bottom: 6px;
    }
    .timeline-content-h {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .timeline-content-p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 11. 前瞻资讯与动态 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-inner {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-dim);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-summary {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .news-link-btn {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-cyan);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link-btn:hover {
      color: #7dd3fc;
      transform: translateX(4px);
    }

    /* 12. 平台合规与安全保障 (#security) */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .sec-badge-card {
      padding: 28px 20px;
      text-align: center;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-subtle);
    }
    .sec-badge-card:hover {
      border-color: var(--primary-cyan);
      background: rgba(0, 240, 255, 0.03);
    }
    .sec-icon {
      font-size: 2rem;
      color: var(--primary-cyan);
      margin-bottom: 14px;
    }
    .sec-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .sec-desc {
      font-size: 0.825rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 13. 快速选型诊断 (#assessment) */
    .assess-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .assess-card {
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
      background: rgba(13, 21, 39, 0.6);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .assess-scenario-name {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .assess-params-tag {
      font-size: 0.8rem;
      color: var(--primary-cyan);
      margin-bottom: 12px;
      font-weight: 600;
    }
    .assess-rec-detail {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .assess-apply-tag {
      font-size: 0.75rem;
      color: var(--text-dim);
      border-top: 1px solid var(--border-subtle);
      padding-top: 10px;
    }

    /* 14. 常见问题 FAQ (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .accordion-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition-smooth);
    }
    .accordion-item.active {
      border-color: var(--border-glow);
    }
    .accordion-header {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.05rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .accordion-icon {
      font-size: 1.25rem;
      color: var(--primary-cyan);
      transition: transform 0.3s ease;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(45deg);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
    }
    .accordion-item.active .accordion-content {
      max-height: 300px;
      padding: 0 24px 22px 24px;
      transition: max-height 0.35s ease-in-out;
    }
    .accordion-content p {
      font-size: 0.925rem;
      color: #cbd5e1;
      line-height: 1.75;
    }

    /* 15. 转化表单与终极 CTA (#contact) */
    .contact-cta-wrapper {
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.18) 0%, rgba(0, 240, 255, 0.08) 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    }
    .cta-left-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-left-desc {
      font-size: 1rem;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .cta-benefits-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-benefits-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9rem;
      color: #e2e8f0;
    }
    .cta-benefits-list li::before {
      content: "✦";
      color: var(--primary-cyan);
    }
    .contact-form {
      background: rgba(10, 15, 29, 0.75);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px;
      backdrop-filter: blur(16px);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: #cbd5e1;
      margin-bottom: 6px;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 14px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition-smooth);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary-cyan);
      background: rgba(255, 255, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
    }
    .form-select option {
      background: #0d1527;
      color: #fff;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
      font-weight: 700;
      color: #030712;
      background: var(--primary-cyan);
      border: none;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
      cursor: pointer;
      margin-top: 10px;
    }
    .btn-submit:hover {
      background: #38bdf8;
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
    }

    /* 页脚 Footer */
    .site-footer {
      background: #060913;
      border-top: 1px solid var(--border-subtle);
      padding: 64px 0 32px 0;
      font-size: 0.875rem;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .footer-brand-desc {
      font-size: 0.85rem;
      line-height: 1.7;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .footer-heading {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary-cyan);
    }
    .footer-contact-item {
      font-size: 0.85rem;
      margin-bottom: 8px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }
    .compliance-links {
      display: flex;
      gap: 18px;
    }

    /* 移动端与响应式断点 */
    @media (max-width: 1024px) {
      .hero-flagship-shelf {
        grid-template-columns: repeat(2, 1fr);
      }
      .flagship-item:nth-child(2) {
        border-right: none;
      }
      .features-grid, .products-grid, .scenario-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar, .security-grid, .assess-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .matrix-grid, .tech-wrap, .compare-wrapper, .contact-cta-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 2.8rem;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .hero-flagship-shelf {
        grid-template-columns: 1fr;
      }
      .flagship-item {
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
        padding-bottom: 12px;
      }
      .features-grid, .products-grid, .scenario-grid, .testimonials-grid, .news-grid, .metrics-bar, .security-grid, .assess-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .milestones-timeline::before {
        left: 20px;
      }
      .timeline-node {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 50px;
        padding-right: 0;
      }
      .timeline-node .timeline-dot {
        left: 12px !important;
      }
      .contact-cta-wrapper {
        padding: 24px;
      }
      .section-title {
        font-size: 1.85rem;
      }
      .top-bar-inner {
        justify-content: center;
        text-align: center;
      }
    }