/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --color-primary: #1E40AF;
      --color-primary-light: #2563EB;
      --color-primary-subtle: #EFF6FF;
      --color-accent: #059669;
      --color-accent-subtle: #ECFDF5;
      --color-dark: #0F172A;
      --color-dark-alt: #1E293B;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 30px -4px rgba(37, 99, 235, 0.12);
      --transition-standard: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      background-color: var(--bg-main);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    /* 顶部双行导航 */
    .top-utility-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .top-utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--color-accent);
      font-weight: 500;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--color-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.1); }
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--color-dark);
      letter-spacing: -0.01em;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
      color: #FFF;
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--color-primary-light);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--color-primary-light);
      border-radius: 2px;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition-standard);
      text-align: center;
      min-height: 44px;
    }
    .btn-primary {
      background-color: var(--color-primary-light);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--color-primary);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    }
    .btn-outline {
      background-color: #FFFFFF;
      color: var(--color-primary-light);
      border-color: var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--color-primary-light);
      background-color: var(--color-primary-subtle);
    }
    .btn-dark {
      background-color: var(--color-dark);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background-color: #000;
    }

    /* 板块结构规范 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }
    .section-block.bg-alt {
      background-color: #FFFFFF;
      border-top: 1px solid #F1F5F9;
      border-bottom: 1px solid #F1F5F9;
    }
    .section-header {
      margin-bottom: 52px;
      max-width: 780px;
    }
    .section-header.text-center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--color-primary-light);
      background-color: var(--color-primary-subtle);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--color-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-intro {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块一：视频官网视效 Hero */
    .hero-video-section {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.85)), url('/assets/images/c8370c386d15662b.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 120px 0 110px;
      overflow: hidden;
    }
    .hero-container {
      position: relative;
      z-index: 2;
    }
    .hero-badge-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
    }
    .hero-pill {
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.25);
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      color: #FFFFFF;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #FFFFFF;
      letter-spacing: -0.02em;
    }
    .hero-title span {
      background: linear-gradient(to right, #60A5FA, #34D399);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #E2E8F0;
      line-height: 1.8;
      max-width: 860px;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-video-player-bar {
      background: rgba(15, 23, 42, 0.65);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .hero-play-indicator {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .play-circle {
      width: 52px;
      height: 52px;
      background: #FFFFFF;
      color: var(--color-primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      box-shadow: 0 0 25px rgba(255, 255, 255, 0.4);
      flex-shrink: 0;
    }
    .hero-ticker-hash {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.875rem;
      color: #93C5FD;
      word-break: break-all;
    }

    /* 板块二：全球覆盖与节点矩阵 */
    .global-nodes-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .node-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-standard);
    }
    .node-stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }
    .node-region-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .node-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--color-primary-subtle);
      color: var(--color-primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
    }
    .latency-pill {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--color-accent);
      background: var(--color-accent-subtle);
      padding: 4px 10px;
      border-radius: var(--radius-full);
    }
    .node-num {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .node-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 板块三：卖点三连 */
    .props-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .prop-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-standard);
      display: flex;
      flex-direction: column;
    }
    .prop-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #93C5FD;
    }
    .prop-icon {
      width: 56px;
      height: 56px;
      background: linear-gradient(135deg, var(--color-primary-subtle), #DBEAFE);
      color: var(--color-primary-light);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 24px;
    }
    .prop-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .prop-text {
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .prop-metric {
      padding-top: 18px;
      border-top: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .prop-metric strong {
      color: var(--color-primary-light);
      font-size: 1rem;
    }

    /* 板块四：底层架构解析 */
    .arch-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .arch-details h3 {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .arch-details p {
      font-size: 1rem;
      color: var(--text-body);
      margin-bottom: 24px;
      line-height: 1.8;
    }
    .arch-spec-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-left: 4px solid var(--color-primary-light);
      border-radius: var(--radius-sm);
      padding: 18px 24px;
      margin-bottom: 28px;
      font-size: 0.9375rem;
      color: var(--text-body);
    }
    .arch-step-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-step-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .step-badge {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--color-primary-light);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8125rem;
      font-weight: 700;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .step-text strong {
      display: block;
      color: var(--text-main);
      font-size: 1rem;
      margin-bottom: 2px;
    }
    .step-text span {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .arch-visual-card {
      background: var(--color-dark);
      border-radius: var(--radius-lg);
      padding: 24px;
      color: #FFFFFF;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.4);
    }
    .console-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #334155;
      padding-bottom: 12px;
      margin-bottom: 18px;
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #EF4444; }
    .dot-yellow { background: #F59E0B; }
    .dot-green { background: #10B981; }
    .console-code {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.85rem;
      line-height: 1.8;
      color: #94A3B8;
    }
    .console-code .hl-key { color: #38BDF8; }
    .console-code .hl-val { color: #34D399; }
    .console-code .hl-num { color: #FBBF24; }

    /* 板块五：场景卡板块 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-standard);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .scenario-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .scenario-card:hover .scenario-img-wrap img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .scenario-badge {
      display: inline-block;
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--color-primary-light);
      background: var(--color-primary-subtle);
      padding: 3px 10px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }
    .scenario-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .scenario-desc {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .scenario-flow-tag {
      font-size: 0.8125rem;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块六：本地化跨链集成能力 */
    .loc-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .loc-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-soft);
    }
    .loc-head {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 18px;
    }
    .loc-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--color-accent-subtle);
      color: var(--color-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
    }
    .loc-head h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .loc-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .loc-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.9375rem;
      color: var(--text-body);
    }
    .loc-list li i {
      color: var(--color-accent);
      font-size: 1.1rem;
      margin-top: 2px;
    }

    /* 板块七：核心优势六宫格 */
    .six-matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-standard);
    }
    .matrix-item:hover {
      border-color: var(--color-primary-light);
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .matrix-item i {
      font-size: 1.8rem;
      color: var(--color-primary-light);
      margin-bottom: 16px;
      display: inline-block;
    }
    .matrix-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .matrix-desc {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 板块八：深色案例与共识理念区 */
    .dark-immersion-section {
      background-color: var(--color-dark);
      color: #FFFFFF;
      padding: 96px 0;
      position: relative;
    }
    .dark-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 52px;
      align-items: center;
    }
    .dark-text h2 {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .dark-text p {
      font-size: 1.05rem;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .immersion-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .immersion-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: #E2E8F0;
    }
    .immersion-list i {
      color: #34D399;
      font-size: 1.2rem;
    }
    .dark-visual {
      background: var(--color-dark-alt);
      border: 1px solid #334155;
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .dark-visual-head {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: #F8FAFC;
    }
    .proof-log-line {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.8125rem;
      background: #0B1120;
      border: 1px solid #1E293B;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      color: #94A3B8;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .proof-log-line .status-tag {
      color: #34D399;
      background: rgba(52, 211, 153, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
    }

    /* 板块九：优惠券墙与测试额度网格 */
    .coupon-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 16px;
    }
    .coupon-card {
      background: #FFFFFF;
      border: 2px dashed #BFDBFE;
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .coupon-card::before, .coupon-card::after {
      content: '';
      position: absolute;
      top: 50%;
      width: 20px;
      height: 20px;
      background-color: var(--bg-main);
      border-radius: 50%;
      transform: translateY(-50%);
    }
    .coupon-card::before { left: -10px; }
    .coupon-card::after { right: -10px; }
    .coupon-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 16px;
    }
    .coupon-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--color-primary-light);
      line-height: 1;
    }
    .coupon-val span {
      font-size: 1rem;
      font-weight: 600;
      margin-left: 4px;
    }
    .coupon-scope {
      background: #EFF6FF;
      color: var(--color-primary);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 4px;
    }
    .coupon-rules {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .coupon-action-btn {
      width: 100%;
      text-align: center;
      background: var(--color-primary-subtle);
      color: var(--color-primary-light);
      padding: 10px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.875rem;
      border: 1px solid #BFDBFE;
      cursor: pointer;
      transition: var(--transition-standard);
    }
    .coupon-action-btn:hover {
      background: var(--color-primary-light);
      color: #FFFFFF;
    }

    /* 板块十：技术方案与套餐对比 */
    .pricing-table-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-soft);
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .pricing-card.popular {
      border-color: var(--color-primary-light);
      box-shadow: 0 12px 30px -4px rgba(37, 99, 235, 0.15);
    }
    .popular-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--color-primary-light);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 14px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
    }
    .pricing-plan-name {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .pricing-plan-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 42px;
    }
    .pricing-spec-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .pricing-spec-list li {
      font-size: 0.9rem;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .pricing-spec-list li i {
      color: var(--color-accent);
      font-size: 1rem;
    }

    /* 板块十一：吞吐量统计条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, #1E3A8A, #1E40AF);
      color: #FFFFFF;
      padding: 56px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-box h3 {
      font-size: 2.6rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 4px;
      letter-spacing: -0.02em;
    }
    .metric-box p {
      font-size: 0.9375rem;
      color: #BFDBFE;
    }

    /* 板块十二：客户口碑与合规背书 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
    }
    .rating-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
    }
    .testimonial-quote {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--color-primary-subtle);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .user-info h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 700;
    }
    .user-info span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块十三：技术资讯与验证快报 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      transition: var(--transition-standard);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-excerpt {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--color-primary-light);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块十四：保障承诺条 */
    .guarantee-bar {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 40px;
      box-shadow: var(--shadow-soft);
    }
    .guarantee-items {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      font-size: 2rem;
      color: var(--color-primary-light);
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .guarantee-text p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块十五：FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: var(--transition-standard);
    }
    .faq-item.active {
      border-color: var(--color-primary-light);
      border-left: 4px solid var(--color-primary-light);
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      background: transparent;
      border: none;
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.8;
      display: none;
    }
    .faq-item.active .faq-content {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-icon {
      transition: transform 0.25s ease;
      color: var(--text-muted);
    }

    /* 板块十六：收口转化与接入表单 */
    .conversion-banner {
      background: linear-gradient(135deg, #1E40AF 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-hover);
    }
    .conv-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .conv-text h2 {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .conv-text p {
      font-size: 1rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .conv-form {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-input {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      outline: none;
      transition: var(--transition-standard);
    }
    .form-input:focus {
      border-color: var(--color-primary-light);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    /* 页脚设计 */
    .site-footer {
      background-color: var(--color-dark);
      color: #94A3B8;
      padding: 80px 0 32px;
      border-top: 1px solid #1E293B;
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .footer-title {
      font-size: 1rem;
      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;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }

    /* 移动端吸底转化条 */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid var(--border-color);
      padding: 10px 16px;
      z-index: 999;
      box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.06);
    }
    .mobile-sticky-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .mobile-nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .global-nodes-grid, .guarantee-items, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .props-grid, .scenario-grid, .six-matrix-grid, .coupon-grid, .pricing-table-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-wrapper, .dark-inner, .conv-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-utility-bar { display: none; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        gap: 16px;
      }
      .nav-menu.show {
        display: flex;
      }
      .mobile-nav-toggle {
        display: block;
      }
      .header-actions .btn {
        display: none;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-video-player-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .global-nodes-grid, .props-grid, .scenario-grid, .loc-grid, .six-matrix-grid, .coupon-grid, .pricing-table-grid, .testimonial-grid, .news-grid, .guarantee-items, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .conversion-banner {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-sticky-bar {
        display: block;
      }
      body {
        padding-bottom: 64px;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}