/* roulang page: index */
:root {
      --deep-blue: #1a1f2e;
      --neon-gold: #f0a500;
      --purple-accent: #7b2ff7;
      --bg-light: #f7f8fc;
      --card-white: #ffffff;
      --text-dark: #2d3748;
      --text-muted: #718096;
      --success-green: #10b981;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
      --neon-glow: 0 0 12px rgba(240,165,0,0.5), 0 0 24px rgba(240,165,0,0.25);
      --neon-glow-strong: 0 0 20px rgba(240,165,0,0.7);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container-main {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    @media (max-width: 768px) {
      .container-main {
        padding: 0 24px;
      }
    }
    @media (max-width: 480px) {
      .container-main {
        padding: 0 16px;
      }
    }
    /* 导航样式 */
    .navbar {
      background-color: var(--deep-blue);
      border-bottom: 2px solid var(--neon-gold);
      position: sticky;
      top: 0;
      z-index: 50;
    }
    .nav-link {
      color: #cbd5e0;
      transition: color 0.2s, text-shadow 0.2s;
      position: relative;
    }
    .nav-link:hover {
      color: white;
    }
    .nav-link.active {
      color: var(--neon-gold);
      text-shadow: 0 0 8px rgba(240,165,0,0.5);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--neon-gold);
      box-shadow: var(--neon-glow);
      transition: width 0.3s ease;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .cta-nav {
      border: 2px solid var(--neon-gold);
      color: var(--neon-gold);
      background: transparent;
      padding: 8px 20px;
      border-radius: 8px;
      font-weight: 600;
      transition: all 0.3s;
      box-shadow: 0 0 8px rgba(240,165,0,0.3);
    }
    .cta-nav:hover {
      background: var(--neon-gold);
      color: var(--deep-blue);
      box-shadow: var(--neon-glow-strong);
    }
    .hamburger-line {
      background-color: var(--neon-gold);
      height: 3px;
      width: 24px;
      margin: 5px 0;
      transition: 0.3s;
    }
    /* 霓虹发光按钮 */
    .btn-primary-glow {
      background: var(--neon-gold);
      color: var(--deep-blue);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 8px;
      box-shadow: var(--neon-glow);
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-primary-glow:hover {
      box-shadow: var(--neon-glow-strong);
      transform: translateY(-2px);
    }
    .btn-outline-glow {
      background: transparent;
      border: 2px solid var(--neon-gold);
      color: var(--neon-gold);
      font-weight: 700;
      padding: 12px 34px;
      border-radius: 8px;
      transition: all 0.3s ease;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-outline-glow:hover {
      background: var(--neon-gold);
      color: var(--deep-blue);
      box-shadow: var(--neon-glow);
    }
    /* 卡片样式 */
    .feature-card {
      background: var(--card-white);
      border-radius: 12px;
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border-top: 3px solid transparent;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-6px);
      border-top-color: var(--neon-gold);
    }
    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      background: var(--card-white);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .case-card:hover {
      box-shadow: 0 0 0 2px var(--neon-gold), var(--neon-glow);
      transform: scale(1.02);
    }
    .comparison-card {
      background: var(--card-white);
      border-radius: 12px;
      padding: 32px 20px;
      box-shadow: var(--shadow-sm);
      border: 2px solid #e2e8f0;
      transition: all 0.3s;
    }
    .comparison-card.recommended {
      border-color: var(--purple-accent);
      border-width: 3px;
      box-shadow: 0 0 20px rgba(123,47,247,0.15);
      position: relative;
    }
    .badge-recommend {
      background: var(--neon-gold);
      color: var(--deep-blue);
      font-weight: 700;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
    }
    /* FAQ 手风琴 */
    .faq-item {
      border-left: 4px solid var(--neon-gold);
      background: #f1f5f9;
      margin-bottom: 16px;
      border-radius: 0 8px 8px 0;
      transition: all 0.3s;
    }
    .faq-question {
      font-weight: 600;
      padding: 16px 24px;
      cursor: pointer;
      color: var(--text-dark);
      transition: color 0.3s;
    }
    .faq-question.active {
      color: var(--neon-gold);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: white;
      margin: 0 16px 16px;
      border-radius: 8px;
      color: var(--text-muted);
      padding: 0 16px;
    }
    .faq-answer.open {
      max-height: 200px;
      padding: 16px;
    }
    /* 霓虹装饰线 */
    .neon-divider {
      width: 60px;
      height: 4px;
      background: var(--neon-gold);
      box-shadow: var(--neon-glow);
      margin: 16px 0 32px;
    }
    .footer-line {
      height: 2px;
      background: var(--neon-gold);
      width: 100%;
      box-shadow: var(--neon-glow);
    }
    @media (max-width: 768px) {
      .hero-container {
        flex-direction: column;
        text-align: center;
      }
      .hero-text {
        order: 1;
      }
      .hero-image {
        order: 0;
        margin-bottom: 32px;
      }
    }