/* roulang page: index */
:root {
      --bg-deep: #0A0E27;
      --bg-footer: #060B1F;
      --primary-gradient: linear-gradient(135deg, #7B2FF7 0%, #00F0FF 100%);
      --accent-warm: #FF6B35;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-white: #FFFFFF;
      --text-light: #B0C4DE;
      --text-muted: #7B8CA8;
      --radius-card: 24px;
      --radius-btn: 50px;
      --radius-input: 12px;
      --shadow-glow: 0 0 20px rgba(123, 47, 247, 0.6), 0 0 40px rgba(0, 240, 255, 0.3);
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-light);
      line-height: 1.8;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--text-white);
    }

    h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

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

    a:hover {
      color: #00F0FF;
    }

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

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      transition: var(--transition);
    }

    .glass-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 40px rgba(123, 47, 247, 0.3);
    }

    /* 发光按钮 */
    .btn-primary {
      background: var(--primary-gradient);
      border: none;
      color: #fff;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      box-shadow: var(--shadow-glow);
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(123, 47, 247, 0.9), 0 0 50px rgba(0, 240, 255, 0.5);
      color: #fff;
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #fff;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-ghost:hover {
      border-color: #fff;
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 60px;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      z-index: 100;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1200px;
      margin: 0 auto;
      width: 100%;
      padding: 0 20px;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-light);
    }

    .nav-links a:hover {
      color: #00F0FF;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero 分屏 */
    .hero-section {
      padding-top: 100px;
      min-height: 100vh;
      display: flex;
      align-items: center;
    }

    .hero-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
    }

    .hero-left {
      flex: 0 0 60%;
      padding-right: 2rem;
    }

    .hero-right {
      flex: 0 0 40%;
      position: relative;
    }

    .hero-image {
      width: 100%;
      border-radius: var(--radius-card);
      box-shadow: 0 0 40px rgba(123, 47, 247, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin: 1.5rem 0 2rem;
    }

    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

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

    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .section-title h2 {
      display: inline-block;
      position: relative;
    }

    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: var(--primary-gradient);
      border-radius: 2px;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }

    .pain-card {
      flex: 1 1 calc(33.333% - 24px);
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: var(--transition);
      text-align: left;
    }

    .pain-card i {
      font-size: 2rem;
      color: #00F0FF;
      margin-bottom: 1rem;
    }

    .pain-card h3 {
      margin-bottom: 0.5rem;
    }

    /* 解决方案 */
    .solution-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 2rem;
    }

    .solution-text {
      flex: 1 1 55%;
    }

    .solution-image {
      flex: 1 1 40%;
    }

    .feature-list {
      list-style: none;
      margin-top: 2rem;
    }

    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 1rem;
      margin-bottom: 1.5rem;
    }

    .feature-list i {
      color: #00F0FF;
      font-size: 1.5rem;
      margin-top: 0.25rem;
    }

    /* 数据区 */
    .stats-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      justify-content: center;
    }

    .stat-item {
      flex: 1 1 200px;
      background: rgba(255, 255, 255, 0.02);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-card);
      padding: 2rem 1rem;
      text-align: center;
      border: 1px solid rgba(255,255,255,0.05);
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent-warm);
      font-family: "Inter", "SF Pro Display", sans-serif;
    }

    /* 证言 */
    .testimonial-grid {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }

    .testimonial-card {
      flex: 1 1 300px;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 32px;
      position: relative;
    }

    .quote-icon {
      font-size: 3rem;
      color: rgba(123, 47, 247, 0.4);
      position: absolute;
      top: 20px;
      left: 20px;
    }

    .testimonial-text {
      font-style: italic;
      margin: 1.5rem 0;
      color: var(--text-light);
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-gradient);
      border: 2px solid #00F0FF;
    }

    /* FAQ */
    .accordion-item {
      background: rgba(255,255,255,0.02);
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .accordion-title {
      padding: 20px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .accordion-content {
      padding: 0 20px 20px;
      color: var(--text-light);
      display: none;
    }

    .accordion-item.active .accordion-content {
      display: block;
    }

    /* CTA */
    .cta-dark {
      background: #060B1F;
      text-align: center;
    }

    .trust-text {
      margin-top: 1rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    /* 页脚 */
    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
      justify-content: space-between;
    }

    .footer-col {
      flex: 1 1 200px;
    }

    .copyright {
      text-align: center;
      padding-top: 2rem;
      margin-top: 2rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      h2 { font-size: 1.8rem; }
      .hero-left, .hero-right { flex: 0 0 100%; padding-right: 0; }
      .hero-right { margin-top: 2rem; }
      .pain-card { flex: 1 1 100%; }
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .mobile-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(10,14,39,0.95);
        flex-direction: column;
        padding: 20px;
      }
      .mobile-menu.active { display: flex; }
      section { padding: 60px 0; }
    }