/* roulang page: index */
:root {
      --primary: #E9405F;
      --primary-glow: rgba(233, 64, 95, 0.5);
      --accent: #00E5FF;
      --accent-glow: rgba(0, 229, 255, 0.6);
      --bg: #1A1A2E;
      --card: #242440;
      --text: #F0F0F5;
      --muted: #8888A0;
      --border-light: rgba(255, 255, 255, 0.05);
      --radius: 12px;
      --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --transition: 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.8;
      letter-spacing: 0.01em;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 标题装饰线 */
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.02em;
      color: white;
      position: relative;
      padding-left: 24px;
      margin-bottom: 40px;
    }
    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 40px;
      background: var(--accent);
      box-shadow: 0 0 8px var(--accent-glow);
      border-radius: 2px;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      background: var(--bg);
      border-bottom: 1px solid rgba(0, 229, 255, 0.3);
      z-index: 1000;
      display: flex;
      align-items: center;
      backdrop-filter: blur(8px);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      text-decoration: none;
      letter-spacing: 1px;
    }
    .logo span {
      color: var(--accent);
      margin-left: 4px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-size: 0.95rem;
      color: var(--muted);
      text-decoration: none;
      font-weight: 500;
      position: relative;
      transition: color var(--transition);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent);
      box-shadow: 0 0 10px var(--accent-glow);
      border-radius: 2px;
    }
    .btn-nav {
      background: var(--primary);
      color: white;
      padding: 10px 24px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      transition: background var(--transition), box-shadow var(--transition);
      font-size: 0.9rem;
    }
    .btn-nav:hover {
      background: #ff4d6a;
      box-shadow: 0 0 20px var(--primary-glow);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 25px;
      height: 3px;
      background: var(--accent);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 70px;
      left: 0;
      width: 100%;
      height: 0;
      overflow: hidden;
      background: var(--bg);
      transition: height 0.3s ease;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 20px;
    }
    .mobile-menu.open {
      height: calc(100vh - 70px);
      padding: 40px 0;
    }
    .mobile-menu a {
      color: var(--muted);
      font-size: 1.2rem;
      text-decoration: none;
      font-weight: 600;
    }

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

    /* Hero */
    .hero {
      position: relative;
      background: linear-gradient(135deg, rgba(26, 26, 46, 0.9) 0%, rgba(26, 26, 46, 0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 100vh;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero .container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero h1 {
      font-size: 2.5rem;
      font-weight: 700;
      line-height: 1.2;
      max-width: 600px;
      color: white;
    }
    .hero .subtitle {
      font-size: 1.1rem;
      color: var(--muted);
      margin: 20px 0 32px;
      max-width: 500px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: all var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: #ff4d6a;
      box-shadow: 0 0 20px var(--primary-glow);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent);
      color: var(--accent);
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
    }
    .hero-image {
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      border-radius: 16px;
      height: 350px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }
    .pain-card {
      background: var(--card);
      border-radius: var(--radius);
      padding: 30px 30px 30px 44px;
      border-left: 4px solid var(--accent);
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: all var(--transition);
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 8px 30px rgba(0,0,0,0.5);
    }
    .pain-card h3 {
      font-size: 1.25rem;
      color: white;
      margin-bottom: 8px;
    }
    .pain-card p {
      color: var(--muted);
    }

    /* 解决方案步骤 */
    .steps {
      display: flex;
      flex-direction: column;
      gap: 30px;
      position: relative;
      padding-left: 30px;
    }
    .steps::before {
      content: '';
      position: absolute;
      left: 12px;
      top: 0;
      height: 100%;
      width: 2px;
      background: rgba(0, 229, 255, 0.2);
    }
    .step-item {
      display: flex;
      gap: 24px;
      align-items: flex-start;
    }
    .step-num {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
      opacity: 0.5;
      width: 40px;
      text-align: center;
    }
    .step-content h3 {
      color: white;
      margin-bottom: 8px;
    }
    .step-content p {
      color: var(--muted);
    }

    /* 成果数字 */
    .results-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .stat-card {
      background: var(--card);
      border-radius: var(--radius);
      padding: 30px;
      text-align: center;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-4px);
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent);
      display: block;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--muted);
      margin-top: 8px;
    }

    /* 证言 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background: var(--card);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .testimonial-card:hover {
      transform: translateY(-4px);
    }
    .quote-icon {
      font-size: 3rem;
      color: var(--primary);
      opacity: 0.5;
      line-height: 1;
    }
    .testimonial-text {
      font-style: italic;
      margin: 16px 0;
      color: var(--text);
    }
    .author {
      font-weight: 700;
      color: white;
    }
    .author-role {
      color: var(--muted);
      font-size: 0.9rem;
    }

    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    details {
      background: var(--card);
      border-radius: var(--radius);
      padding: 20px;
      border: 1px solid var(--border-light);
      cursor: pointer;
      transition: background var(--transition);
    }
    details:hover {
      background: #2A2A4A;
    }
    summary {
      font-weight: 700;
      font-size: 1.25rem;
      color: white;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    summary::after {
      content: '+';
      font-size: 1.5rem;
      color: var(--accent);
      margin-left: 16px;
    }
    details[open] summary::after {
      content: '−';
    }
    details p {
      margin-top: 16px;
      color: var(--muted);
    }

    /* 联系表单 */
    .contact-section {
      background: var(--bg);
      text-align: center;
    }
    .contact-form {
      max-width: 500px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-form input,
    .contact-form textarea {
      background: var(--card);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px;
      padding: 14px;
      color: white;
      font-family: inherit;
      transition: var(--transition);
    }
    .contact-form input:focus,
    .contact-form textarea:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 10px var(--accent-glow);
    }
    .btn-submit {
      background: var(--accent);
      color: var(--bg);
      padding: 14px;
      border: none;
      border-radius: 8px;
      font-weight: 700;
      cursor: pointer;
      transition: all var(--transition);
    }
    .btn-submit:hover {
      box-shadow: 0 0 20px var(--accent-glow);
    }
    .privacy-note {
      font-size: 0.85rem;
      color: var(--muted);
      margin-top: 12px;
    }

    /* 页脚 */
    footer {
      background: #12122A;
      padding: 30px 0;
      font-size: 0.85rem;
      color: var(--muted);
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .footer-grid a {
      color: var(--accent);
      text-decoration: none;
    }

    /* 响应式 */
    @media (max-width: 1023px) {
      .hero .container {
        grid-template-columns: 1fr;
      }
      .results-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .hero h1 {
        font-size: 1.75rem;
      }
      section {
        padding: 60px 0;
      }
      .results-grid,
      .testimonials-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .footer-grid {
        flex-direction: column;
        text-align: center;
      }
    }