/* roulang page: index */
:root {
      --primary-deep: #0A1628;
      --accent-green: #00C853;
      --highlight-orange: #FF6D00;
      --bg-light: #F4F6F9;
      --bg-card: #FFFFFF;
      --bg-gray-section: #EAEDF2;
      --text-title: #0A1628;
      --text-body: #2D3748;
      --text-muted: #5A6B7F;
      --text-on-dark: #FFFFFF;
      --text-on-dark-muted: #B0C4DE;
      --border-light: #E2E8F0;
      --shadow-card: 0 2px 12px rgba(10, 22, 40, 0.06);
      --shadow-card-hover: 0 8px 30px rgba(10, 22, 40, 0.12);
      --shadow-nav: 0 1px 0 rgba(10, 22, 40, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 6px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
      --font-mono: "Inter", "SF Mono", "Roboto Mono", monospace;
      --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    h1, h2, h3 {
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 48px;
      line-height: 56px;
    }

    h2 {
      font-size: 36px;
      line-height: 44px;
      margin-bottom: 16px;
    }

    h3 {
      font-size: 22px;
      line-height: 30px;
      font-weight: 600;
    }

    .text-mono {
      font-family: var(--font-mono);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 600;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition-base);
    }

    /* 导航栏 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: var(--shadow-nav);
    }

    .nav-row-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 28px;
      color: var(--highlight-orange);
    }

    .logo-text {
      font-weight: 700;
      font-size: 24px;
      color: var(--primary-deep);
      letter-spacing: -0.02em;
    }

    .logo-text span {
      color: var(--accent-green);
    }

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

    .search-icon {
      font-size: 20px;
      color: var(--text-muted);
      cursor: pointer;
    }

    .btn-primary {
      background: var(--highlight-orange);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      box-shadow: 0 4px 10px rgba(255, 109, 0, 0.2);
    }

    .btn-primary:hover {
      background: #E55D00;
      transform: scale(1.03);
      box-shadow: 0 6px 20px rgba(255, 109, 0, 0.35);
    }

    .nav-row-bottom {
      padding: 8px 0 12px;
      display: flex;
      gap: 8px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
    }

    .nav-pill {
      padding: 8px 20px;
      border-radius: 40px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      background: transparent;
      transition: var(--transition-base);
    }

    .nav-pill.active {
      background: var(--primary-deep);
      color: white;
      font-weight: 600;
    }

    .nav-pill:hover:not(.active) {
      color: var(--primary-deep);
      background: rgba(10, 22, 40, 0.05);
    }

    /* Hero */
    .hero-section {
      background: var(--primary-deep);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 80px 0;
      color: white;
      overflow: hidden;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-left {
      flex: 1;
    }

    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }

    .hero-title {
      color: white;
      font-size: 48px;
      margin-bottom: 20px;
    }

    .hero-sub {
      color: var(--text-on-dark-muted);
      font-size: 18px;
      margin-bottom: 32px;
      max-width: 480px;
    }

    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid var(--highlight-orange);
      color: var(--highlight-orange);
      padding: 10px 24px;
      border-radius: var(--radius-btn);
    }

    .btn-secondary:hover {
      background: var(--highlight-orange);
      color: white;
    }

    .trial-note {
      color: var(--text-on-dark-muted);
      font-size: 14px;
      margin-top: 12px;
    }

    .dashboard-mock {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-card);
      padding: 20px;
      width: 100%;
    }

    .dashboard-mock img {
      border-radius: 8px;
    }

    /* 板块通用 */
    .section {
      padding: 100px 0;
    }

    .section-dark {
      background: var(--primary-deep);
      color: white;
    }

    .section-gray {
      background: var(--bg-gray-section);
    }

    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-green);
    }

    .icon-circle {
      width: 56px;
      height: 56px;
      background: rgba(0, 200, 83, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-green);
      font-size: 24px;
      margin-bottom: 20px;
    }

    /* 产品矩阵两列 */
    .matrix-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }

    .matrix-row.reverse {
      flex-direction: row-reverse;
    }

    .matrix-text {
      flex: 1;
    }

    .matrix-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .feature-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
      color: var(--text-body);
    }

    .feature-list i {
      color: var(--accent-green);
    }

    /* 统计数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 48px;
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 40px;
      font-family: var(--font-mono);
      color: var(--highlight-orange);
      font-weight: 700;
    }

    .logo-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 32px;
      filter: grayscale(1);
      opacity: 0.7;
    }

    /* FAQ */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-question {
      padding: 24px 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
    }

    .faq-answer {
      padding: 0 32px 24px;
      color: var(--text-muted);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #0A1628 0%, #0f2040 100%);
      text-align: center;
      padding: 100px 0;
    }

    .footer {
      background: var(--primary-deep);
      color: var(--text-on-dark-muted);
      padding: 60px 0 30px;
    }

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

    @media (max-width: 1024px) {
      .grid-3, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-grid, .matrix-row {
        flex-direction: column;
      }
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 20px;
      }
      h1 {
        font-size: 32px;
        line-height: 40px;
      }
      .grid-3, .stats-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
    }