/* roulang page: index */
:root {
      --primary: #7B2FF7;
      --accent: #00F0FF;
      --bg-deep: #0A0E17;
      --surface: #131A2B;
      --text-main: #E8ECF1;
      --text-muted: #B0B8C5;
      --text-dim: #6B7280;
      --border-light: rgba(123, 47, 247, 0.2);
      --border-accent: rgba(0, 240, 255, 0.25);
      --radius-card: 16px;
      --radius-btn: 50px;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.45);
      --shadow-glow: 0 0 18px rgba(123, 47, 247, 0.5);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      --transition: 0.25s ease-out;
    }

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

    body {
      background-color: var(--bg-deep);
      color: var(--text-main);
      font-family: var(--font-sans);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s ease;
    }

    /* 顶部信息条 */
    .top-bar {
      background: #0A0E17;
      border-bottom: 1px solid #1E2535;
      height: 36px;
      display: flex;
      align-items: center;
      font-size: 12px;
      color: #6B7280;
      padding: 0 24px;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
    }
    .top-bar-left {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .top-bar-left .bolt {
      font-size: 14px;
      color: var(--accent);
    }
    .top-bar-right a {
      color: #6B7280;
      font-weight: 500;
      transition: color 0.2s;
    }
    .top-bar-right a:hover {
      color: var(--accent);
    }

    /* 主导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(10, 14, 23, 0.82);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(123, 47, 247, 0.2);
      height: 72px;
      display: flex;
      align-items: center;
      padding: 0 24px;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
    }
    .logo {
      font-size: 24px;
      font-weight: 800;
      letter-spacing: 1px;
      background: linear-gradient(135deg, #7B2FF7, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-icon {
      font-size: 26px;
      filter: drop-shadow(0 0 6px var(--accent));
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: #B0B8C5;
      padding: 8px 0;
      position: relative;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: #E8ECF1;
      border-radius: 2px;
      transition: 0.2s;
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #ffffff;
      letter-spacing: 0.5px;
    }
    .section-sub {
      font-size: 18px;
      color: #9CA3AF;
      margin-bottom: 48px;
    }

    /* Hero */
    .hero {
      padding: 120px 0;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(123,47,247,0.15) 0%, #0A0E17 90%);
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-right {
      flex: 1 1 50%;
      display: flex;
      justify-content: center;
    }
    .hero-right img {
      max-height: 400px;
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .gradient-text {
      background: linear-gradient(135deg, #7B2FF7, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 18px;
      color: #9CA3AF;
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #7B2FF7, #00F0FF);
      color: #fff;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 50px;
      box-shadow: 0 0 20px rgba(123,47,247,0.5);
      transition: 0.2s;
      border: none;
    }
    .btn-primary:hover {
      box-shadow: 0 0 28px rgba(0,240,255,0.7);
      transform: scale(1.03);
    }
    .btn-outline {
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 14px 32px;
      border-radius: 50px;
      font-weight: 600;
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 20px;
    }
    .pain-card {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .pain-card:hover {
      border-color: var(--accent);
      transform: translateY(-6px);
      box-shadow: var(--shadow-card);
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .old-val {
      color: #6B7280;
      text-decoration: line-through;
      font-size: 18px;
    }
    .new-val {
      color: var(--accent);
      font-size: 24px;
      font-weight: 700;
    }

    /* 解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 30px;
    }
    .stat-badge {
      background: rgba(123,47,247,0.1);
      border: 1px solid rgba(0,240,255,0.2);
      border-radius: 20px;
      padding: 24px 16px;
      text-align: center;
    }
    .stat-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--accent);
    }

    /* 成果看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: #0F1520;
      border-radius: 20px;
      padding: 28px 20px;
      border: 1px solid rgba(123,47,247,0.25);
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: var(--surface);
      border-radius: 28px;
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: center;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .faq-item {
      background: #0F1520;
      border-radius: 16px;
      padding: 18px 20px;
      border: 1px solid transparent;
      cursor: pointer;
    }
    .faq-item.open {
      border-color: var(--accent);
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #7B2FF7, #0A0E17);
      border-radius: 32px;
      padding: 64px 32px;
      text-align: center;
    }

    /* Footer */
    .footer {
      background: #0A0E17;
      padding: 60px 0 30px;
      border-top: 1px solid #1E2535;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .pain-grid, .solution-grid, .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero h1 {
        font-size: 40px;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .hero .container {
        flex-direction: column;
      }
      .pain-grid, .solution-grid, .dashboard-grid, .testimonial-grid, .faq-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 60px 0;
      }
      .hero {
        padding: 60px 0;
      }
    }