/* roulang page: index */
/* ----- 设计变量与全局重置 ----- */
    :root {
      --primary-deep: #1E1B4B;    /* 深空靛紫 */
      --primary-hover: #2D2A6B;
      --accent-energy: #F59E0B;   /* 星光琥珀橙 */
      --accent-energy-hover: #D97706;
      --accent-cool: #10B981;     /* 极光青绿 */
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-primary: #1E293B;
      --text-secondary: #64748B;
      --text-on-dark: #F1F5F9;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-button: 8px;
      --transition: 0.3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    h1, h2, h3, p {
      margin: 0;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 覆盖Foundation默认样式，建立自定义视觉 */
    .button {
      border-radius: var(--radius-button);
      font-weight: 600;
      padding: 14px 32px;
      transition: var(--transition);
      font-family: var(--font-sans);
      line-height: 1.2;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
    }
    
    .button.primary-btn {
      background-color: var(--primary-deep);
      color: white;
    }
    .button.primary-btn:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 0 0 2px rgba(30,27,75,0.3);
    }
    
    .button.accent-btn {
      background-color: var(--accent-energy);
      color: #1E293B;
      font-weight: 700;
    }
    .button.accent-btn:hover {
      background-color: var(--accent-energy-hover);
      color: #000;
    }
    
    .button.outline-btn {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      font-weight: 600;
    }
    .button.outline-btn:hover {
      background-color: var(--primary-deep);
      color: white;
    }
    
    /* 导航样式 */
    .custom-header {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.03);
      position: sticky;
      top: 0;
      z-index: 99;
      padding: 16px 0;
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-deep);
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--accent-energy);
    }
    
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .desktop-nav a.nav-link {
      color: #475569;
      font-weight: 500;
      position: relative;
      padding-bottom: 6px;
    }
    .desktop-nav a.nav-link.active {
      color: var(--primary-deep);
    }
    .desktop-nav a.nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-deep);
    }
    .desktop-nav .cta-button {
      background: var(--accent-energy);
      color: #1E293B;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: 8px;
      margin-left: 8px;
    }
    
    /* 汉堡菜单（移动端） */
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
      cursor: pointer;
    }
    
    /* 区块通用间距 */
    section {
      padding: 90px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 60px 0;
      }
    }
    
    .section-title {
      font-size: 36px;
      font-weight: 600;
      line-height: 1.3;
      color: var(--text-primary);
      margin-bottom: 16px;
      text-align: center;
    }
    .section-subtitle {
      color: var(--text-secondary);
      font-size: 18px;
      text-align: center;
      max-width: 700px;
      margin: 0 auto 48px;
    }
    
    /* Hero区域 */
    #hero {
      background: linear-gradient(135deg, #F8FAFC 0%, #E2E8F0 100%);
      padding: 80px 0 100px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1;
    }
    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: var(--primary-deep);
    }
    .hero-sub {
      font-size: 18px;
      color: #475569;
      margin: 24px 0 32px;
      line-height: 1.6;
    }
    .hero-image {
      flex: 1;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(0,0,0,0.1);
    }
    
    /* 卡片组件 */
    .custom-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .icon-accent {
      font-size: 2rem;
      color: var(--accent-cool);
      margin-bottom: 16px;
    }
    
    /* 成果深色区块 */
    .dark-bg {
      background-color: var(--primary-deep);
      color: white;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-cool);
    }
    
    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-energy);
    }
    
    /* FAQ手风琴 */
    .faq-item {
      border-bottom: 1px solid #e2e8f0;
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    
    /* 页脚 */
    .footer {
      background: #2D2A6B;
      color: #CBD5E1;
      padding: 60px 0 30px;
    }
    .footer a:hover {
      color: white;
    }
    
    /* 移动端调整 */
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .desktop-nav {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 20px;
        gap: 16px;
      }
      .mobile-menu.is-active {
        display: flex;
      }
    }
    
    @media (max-width: 640px) {
      .hero-text h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 28px;
      }
    }