/* roulang page: index */
:root {
      --bg-base: #050b17;
      --bg-alt: #0a1329;
      --surface-glass: rgba(16, 28, 54, 0.65);
      --surface-hover: rgba(22, 38, 74, 0.85);
      --border-glass: rgba(0, 163, 255, 0.18);
      --border-highlight: rgba(0, 210, 255, 0.5);
      --primary: #0070f3;
      --primary-cyan: #00d2ff;
      --accent: #00f0ff;
      --text-main: #ffffff;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
      --shadow-glow: 0 0 25px rgba(0, 210, 255, 0.25);
      --shadow-btn: 0 0 18px rgba(0, 112, 243, 0.45);
      --transition: all 0.3s 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-base);
      background-image: radial-gradient(circle at 50% 0%, #102144 0%, #050b17 70%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部辅助栏与双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      background: rgba(5, 11, 23, 0.88);
      border-bottom: 1px solid var(--border-glass);
    }

    .top-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
      color: var(--text-muted);
      padding: 8px 0;
    }

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

    .top-meta-list {
      display: flex;
      gap: 20px;
      list-style: none;
    }

    .top-meta-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .top-badge {
      background: rgba(0, 210, 255, 0.1);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      border: 1px solid rgba(0, 210, 255, 0.2);
    }

    .main-nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }

    .logo-emblem {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--primary-cyan));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-btn);
    }

    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }

    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 8px 0;
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
    }

    .nav-link:hover::after {
      width: 100%;
    }

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

    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-glass);
      color: #fff;
      font-size: 1.2rem;
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }

    .btn-glow {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-cyan) 100%);
      color: #fff;
      box-shadow: var(--shadow-btn);
    }

    .btn-glow:hover {
      transform: translateY(-2px) scale(1.02);
      box-shadow: 0 0 25px rgba(0, 210, 255, 0.6);
      color: #fff;
    }

    .btn-outline {
      background: rgba(16, 28, 54, 0.4);
      color: #fff;
      border-color: var(--border-glass);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      box-shadow: var(--shadow-glow);
    }

    /* 区块通用结构 */
    .section-block {
      padding: 96px 0;
      position: relative;
    }

    .section-block-alt {
      background-color: var(--bg-alt);
      border-top: 1px solid rgba(0, 163, 255, 0.08);
      border-bottom: 1px solid rgba(0, 163, 255, 0.08);
    }

    .section-head {
      margin-bottom: 56px;
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-eyebrow {
      display: inline-block;
      text-transform: uppercase;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 2px;
      margin-bottom: 12px;
      padding: 4px 12px;
      background: rgba(0, 210, 255, 0.08);
      border-radius: 20px;
      border: 1px solid rgba(0, 210, 255, 0.2);
    }

    .section-title {
      font-size: 2.3rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 玻璃卡片 */
    .glass-panel {
      background: var(--surface-glass);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .glass-panel:hover {
      transform: translateY(-4px);
      border-color: var(--border-highlight);
      box-shadow: var(--shadow-glow);
      background: var(--surface-hover);
    }

    /* Hero 首屏 */
    .hero-section {
      min-height: calc(100vh - 110px);
      display: flex;
      align-items: center;
      position: relative;
      padding: 80px 0;
      background: url('/assets/images/d15b6de999111fbf.webp') no-repeat center center / cover;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(5, 11, 23, 0.85) 0%, rgba(5, 11, 23, 0.95) 100%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 880px;
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 112, 243, 0.2);
      border: 1px solid rgba(0, 210, 255, 0.3);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      color: var(--accent);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #ffffff 40%, var(--primary-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.15rem;
      color: #cbd5e1;
      margin-bottom: 36px;
      line-height: 1.8;
      max-width: 780px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 48px;
    }

    .trust-strip {
      display: flex;
      align-items: center;
      gap: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .trust-item svg {
      color: var(--accent);
      width: 18px;
      height: 18px;
    }

    /* 卖点三连 */
    .grid-three {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card-icon {
      width: 52px;
      height: 52px;
      background: rgba(0, 112, 243, 0.15);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #fff;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 架构融合 (图文双列) */
    .split-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .dashboard-preview-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-glass);
      box-shadow: var(--shadow-card);
    }

    .preview-tag-float {
      position: absolute;
      top: 16px;
      right: 16px;
      background: rgba(5, 11, 23, 0.8);
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      backdrop-filter: blur(8px);
    }

    .spec-item {
      display: flex;
      gap: 16px;
      margin-bottom: 20px;
    }

    .spec-num {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(0, 210, 255, 0.1);
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    /* 优势六宫格 */
    .grid-six {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    /* 方案三卡 */
    .solution-card {
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .solution-card.featured {
      border-color: var(--accent);
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.2);
    }

    .featured-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: linear-gradient(135deg, var(--primary), var(--primary-cyan));
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 12px;
      letter-spacing: 0.5px;
    }

    .solution-list {
      list-style: none;
      margin: 20px 0;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .solution-list li {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .solution-list li::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }

    /* 时间轴工作流 */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .timeline-step {
      position: relative;
      background: var(--surface-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .step-marker {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    /* 客户案例 */
    .story-card-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
      margin-bottom: 32px;
    }

    .story-cover-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-glass);
    }

    /* 数据指标条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-box {
      padding: 24px;
      background: rgba(16, 28, 54, 0.4);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
    }

    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 资讯列表 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .insight-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .insight-thumb {
      height: 180px;
      overflow: hidden;
    }

    .insight-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .insight-card:hover .insight-thumb img {
      transform: scale(1.05);
    }

    .insight-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .insight-date {
      font-size: 0.8rem;
      color: var(--accent);
      margin-bottom: 8px;
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--surface-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-arrow {
      font-size: 1.2rem;
      color: var(--accent);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: var(--border-highlight);
      background: rgba(22, 38, 74, 0.7);
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 0 24px 20px;
    }

    /* 保障图标条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 16px 20px;
      background: rgba(16, 28, 54, 0.35);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
    }

    .guarantee-icon {
      font-size: 1.5rem;
      color: var(--accent);
    }

    /* 底部收口行动区 */
    .cta-card-full {
      background: linear-gradient(135deg, rgba(16, 28, 54, 0.9) 0%, rgba(5, 11, 23, 0.95) 100%);
      border: 1px solid var(--border-highlight);
      border-radius: 20px;
      padding: 60px 40px;
      text-align: center;
      box-shadow: 0 0 40px rgba(0, 112, 243, 0.2);
    }

    .cta-form-row {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 540px;
      margin: 32px auto 16px;
    }

    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glass);
      background: rgba(5, 11, 23, 0.7);
      color: #fff;
      font-size: 0.95rem;
      outline: none;
    }

    .cta-input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }

    /* 页脚 */
    .site-footer {
      background: #03070f;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 64px 0 32px;
      color: var(--text-dim);
      font-size: 0.88rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand-desc {
      margin-top: 16px;
      line-height: 1.7;
      color: var(--text-muted);
      max-width: 360px;
    }

    .footer-col-title {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .grid-three, .grid-six, .timeline-grid, .insights-grid, .guarantee-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.8rem;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #050b17;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-glass);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
      }
      .nav-menu.open {
        transform: translateY(0);
      }
      .split-layout, .story-card-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-three, .grid-six, .timeline-grid, .insights-grid, .metrics-bar, .guarantee-bar {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-form-row {
        flex-direction: column;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .hero-cta-group {
        flex-direction: column;
      }
      .hero-cta-group .btn {
        width: 100%;
      }
    }