/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-light: #2563EB;
      --primary-dark: #0A387E;
      --secondary: #00B4D8;
      --accent: #06B6D4;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B132B;
      --bg-dark-card: #1C2541;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-light: rgba(226, 232, 240, 0.9);
      --border-card: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.07), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.7;
      overflow-x: hidden;
    }

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

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

    ul, ol {
      list-style: none;
    }

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

    /* 顶部服务栏 */
    .utility-bar {
      background: #0B132B;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .utility-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .utility-meta span {
      margin-right: 20px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .utility-status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #34D399;
      font-weight: 500;
    }
    .utility-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }

    /* 统一导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 4px 10px rgba(15, 82, 186, 0.25);
    }
    .brand-logo span.highlight {
      color: var(--text-main);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
      border-radius: 2px;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #fff;
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
    }
    .btn-primary:hover {
      box-shadow: 0 8px 20px rgba(15, 82, 186, 0.35);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: #FFFFFF;
      color: var(--primary);
      border-color: #CBD5E1;
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      background: #F1F5F9;
      transform: translateY(-2px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* Section 通用结构 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-header {
      margin-bottom: 50px;
      max-width: 820px;
    }
    .section-header.text-center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-block;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 700;
      border-radius: 999px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .badge-accent {
      background: rgba(6, 182, 212, 0.12);
      color: #0891B2;
    }
    .badge-warn {
      background: #FEF2F2;
      color: #DC2626;
      border: 1px solid #FCA5A5;
    }
    .badge-success {
      background: #ECFDF5;
      color: #059669;
      border: 1px solid #A7F3D0;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* Hero 卡片堆叠架构 */
    .hero-section {
      padding: 60px 0 100px;
      background: radial-gradient(circle at 85% 15%, rgba(0, 180, 216, 0.12) 0%, rgba(248, 250, 252, 0) 65%),
                  radial-gradient(circle at 10% 40%, rgba(15, 82, 186, 0.08) 0%, rgba(248, 250, 252, 0) 50%);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 46px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.22;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }
    .hero-content h1 span.gradient-text {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-text {
      font-size: 17px;
      color: var(--text-body);
      margin-bottom: 32px;
      line-height: 1.85;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-kpis {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
    }
    .kpi-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 4px;
      display: flex;
      align-items: baseline;
      gap: 2px;
    }
    .kpi-num small {
      font-size: 15px;
      font-weight: 600;
    }
    .kpi-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Hero 卡片交错堆叠视觉区 */
    .hero-stack-container {
      position: relative;
      padding: 30px 20px;
    }
    .card-stack {
      position: relative;
      height: 480px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .stack-card {
      position: absolute;
      border-radius: var(--radius-lg);
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      box-shadow: var(--shadow-hover);
      transition: var(--transition);
      overflow: hidden;
    }
    .stack-card-main {
      width: 82%;
      height: 380px;
      z-index: 3;
      transform: translateY(0);
      background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
      display: flex;
      flex-direction: column;
    }
    .card-topbar {
      padding: 12px 18px;
      background: #0F172A;
      color: #94A3B8;
      font-size: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .card-lights {
      display: flex;
      gap: 6px;
    }
    .card-lights span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #475569;
    }
    .card-lights span:nth-child(1) { background: #EF4444; }
    .card-lights span:nth-child(2) { background: #F59E0B; }
    .card-lights span:nth-child(3) { background: #10B981; }
    .stack-media-frame {
      position: relative;
      flex: 1;
      overflow: hidden;
      background: #000;
    }
    .stack-media-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.9;
    }
    .stream-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(15, 23, 42, 0.85) 0%, transparent 60%);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 20px;
      color: #FFFFFF;
    }
    .stream-fps {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(16, 185, 129, 0.2);
      border: 1px solid rgba(16, 185, 129, 0.4);
      color: #34D399;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-family: monospace;
      margin-bottom: 6px;
      align-self: flex-start;
    }
    .stack-card-left {
      width: 60%;
      height: 250px;
      left: -10px;
      top: 40px;
      z-index: 2;
      transform: rotate(-5deg);
      background: #FFFFFF;
      padding: 20px;
      border: 1px solid #CBD5E1;
    }
    .stack-card-right {
      width: 64%;
      height: 270px;
      right: -10px;
      bottom: 20px;
      z-index: 4;
      transform: rotate(4deg);
      background: #0F172A;
      color: #F8FAFC;
      padding: 22px;
      border: 1px solid #334155;
      box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.25);
    }
    .telemetry-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 13px;
    }
    .telemetry-row span.val {
      color: var(--secondary);
      font-weight: 700;
      font-family: monospace;
    }

    /* 行业痛点对比区 (#pain-points) */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .pain-icon-wrapper {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: #FEF2F2;
      color: #EF4444;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .pain-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .pain-card p {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .pain-solution {
      background: #F8FAFC;
      border-left: 3px solid var(--primary);
      padding: 12px 14px;
      font-size: 13px;
      color: var(--primary-dark);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-weight: 500;
    }

    /* 整体技术介绍与架构区 (#about) */
    .about-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .about-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-card);
    }
    .about-visual img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .about-cert-tag {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(15, 23, 42, 0.9);
      backdrop-filter: blur(10px);
      color: #FFFFFF;
      padding: 14px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 13px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .about-content h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .about-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .about-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
    }
    .about-check {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: rgba(15, 82, 186, 0.12);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 核心技术优势 3x2 网格 (#features) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 34px 30px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 82, 186, 0.3);
    }
    .feature-header {
      margin-bottom: 20px;
    }
    .feature-icon-box {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(15, 82, 186, 0.1) 0%, rgba(0, 180, 216, 0.15) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.7;
    }
    .feature-meta {
      margin-top: 24px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }

    /* 解决方案矩阵 (#solutions) */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .solution-cover {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .solution-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .solution-card:hover .solution-cover img {
      transform: scale(1.05);
    }
    .solution-body {
      padding: 30px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .solution-body p {
      font-size: 14.5px;
      color: var(--text-body);
      margin-bottom: 20px;
      flex: 1;
    }
    .solution-specs {
      background: #F8FAFC;
      border-radius: var(--radius-sm);
      padding: 14px;
      margin-bottom: 22px;
    }
    .spec-item {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      margin-bottom: 6px;
    }
    .spec-item:last-child {
      margin-bottom: 0;
    }
    .spec-item span:first-child {
      color: var(--text-muted);
    }
    .spec-item span:last-child {
      font-weight: 600;
      color: var(--text-main);
    }

    /* 接入四步法流程 (#workflow) */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      margin-top: 30px;
    }
    .workflow-step {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-number {
      font-size: 36px;
      font-weight: 900;
      color: rgba(15, 82, 186, 0.15);
      line-height: 1;
      margin-bottom: 14px;
      font-family: monospace;
    }
    .workflow-step h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .workflow-step p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
    }
    .step-tag {
      display: inline-block;
      margin-top: 14px;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      background: #EFF6FF;
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 架构理念深色区块 (#architecture) */
    .dark-architecture-section {
      background: linear-gradient(135deg, var(--bg-dark) 0%, #111E38 100%);
      color: #F8FAFC;
      position: relative;
      overflow: hidden;
    }
    .dark-architecture-section .section-title {
      color: #FFFFFF;
    }
    .dark-architecture-section .section-desc {
      color: #94A3B8;
    }
    .arch-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 50px;
      align-items: center;
    }
    .arch-specs {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-box {
      background: rgba(28, 37, 65, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }
    .arch-box:hover {
      border-color: var(--secondary);
      transform: translateX(4px);
    }
    .arch-box h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .arch-box h3 span.badge-num {
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .arch-box p {
      font-size: 14px;
      color: #CBD5E1;
      line-height: 1.7;
    }
    .arch-visual-board {
      background: var(--bg-dark-card);
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 24px;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .arch-console-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
      padding-bottom: 12px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
      color: #94A3B8;
    }
    .arch-topology-img {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 18px;
    }
    .arch-topology-img img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }
    .arch-logs {
      font-family: monospace;
      font-size: 12.5px;
      background: #0B132B;
      padding: 14px;
      border-radius: var(--radius-sm);
      color: #38BDF8;
      line-height: 1.6;
    }

    /* 成果指标统计条 (#metrics) */
    .metrics-bar-section {
      background: #0F52BA;
      color: #FFFFFF;
      padding: 60px 0;
      position: relative;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-item {
      padding: 10px 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.2);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 42px;
      font-weight: 900;
      letter-spacing: -1px;
      margin-bottom: 6px;
      color: #FFFFFF;
    }
    .metric-value span {
      font-size: 22px;
      color: var(--secondary);
    }
    .metric-name {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 13px;
      color: #BFDBFE;
    }

    /* 标杆实践故事区 (#stories) */
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .story-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .story-img-wrap img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }
    .story-info h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .story-info p {
      font-size: 15px;
      color: var(--text-body);
      margin-bottom: 24px;
      line-height: 1.8;
    }
    .story-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 24px;
    }
    .highlight-card {
      background: #F8FAFC;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--secondary);
    }
    .highlight-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .highlight-label {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 客户证言区 (#testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 15px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testi-quote {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 24px;
      flex: 1;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-light);
      padding-top: 18px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 15px;
    }
    .author-meta h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-meta p {
      font-size: 12.5px;
      color: var(--text-muted);
    }

    /* 精选资讯与技术洞察 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .news-thumbnail {
      height: 190px;
      overflow: hidden;
    }
    .news-thumbnail img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumbnail img {
      transform: scale(1.04);
    }
    .news-content {
      padding: 26px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-content p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }
    .news-action {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 常见问题手风琴 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }
    .accordion-header {
      padding: 22px 26px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #FFFFFF;
      transition: var(--transition);
    }
    .accordion-header:hover {
      background: #F8FAFC;
    }
    .accordion-header h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
    }
    .accordion-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 700;
      transition: transform 0.3s ease;
    }
    .accordion-content {
      padding: 0 26px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #F8FAFC;
      border-top: 1px solid transparent;
    }
    .accordion-content p {
      padding: 18px 0;
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.8;
    }
    .accordion-item.active {
      border-color: #BFDBFE;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
      background: var(--primary);
      color: #fff;
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
      border-top-color: var(--border-light);
    }

    /* 最终转化 CTA 区 (#cta) */
    .cta-banner-section {
      background: linear-gradient(135deg, #0F52BA 0%, #0B132B 100%);
      color: #FFFFFF;
      padding: 85px 0;
      text-align: center;
      position: relative;
    }
    .cta-box {
      max-width: 820px;
      margin: 0 auto;
    }
    .cta-box h2 {
      font-size: 38px;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .cta-box p {
      font-size: 17px;
      color: #CBD5E1;
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .cta-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }
    .btn-light {
      background: #FFFFFF;
      color: var(--primary);
      font-weight: 700;
    }
    .btn-light:hover {
      background: #F1F5F9;
      transform: translateY(-2px);
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.4);
      color: #FFFFFF;
    }
    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
    }

    /* 页脚与合规保障区 */
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 80px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14.5px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 60px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-brand-title {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-brand-title span {
      color: var(--secondary);
    }
    .footer-desc {
      line-height: 1.7;
      margin-bottom: 20px;
      font-size: 14px;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a:hover {
      color: var(--secondary);
      padding-left: 4px;
    }
    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 14px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13.5px;
    }
    .trust-badges {
      display: flex;
      gap: 14px;
    }
    .trust-badge-pill {
      background: rgba(255, 255, 255, 0.06);
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 12px;
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .about-split, .arch-grid, .story-card {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .pain-grid, .features-grid, .solutions-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.15);
        padding-bottom: 20px;
      }
      .metric-item:nth-child(3), .metric-item:nth-child(4) {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links, .header-actions {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .pain-grid, .features-grid, .solutions-grid, .testimonials-grid, .news-grid, .workflow-timeline {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-kpis {
        grid-template-columns: 1fr;
        gap: 14px;
      }
      .hero-stack-container {
        padding: 10px 0;
      }
      .card-stack {
        height: 380px;
      }
      .stack-card-left, .stack-card-right {
        display: none;
      }
      .stack-card-main {
        width: 100%;
        height: 340px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      /* 抽屉导航展开态 */
      .nav-active .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        padding: 24px;
        gap: 18px;
        z-index: 999;
      }
    }