/* roulang page: index */
:root {
      --deep-space: #1A0F2E;
      --starlight-gold: #F5B042;
      --nebula-purple: #6B3FA0;
      --竞技绿: #0F9B8E;
      --text-primary: #1E1E1E;
      --text-secondary: #5A5A5A;
      --bg-light: #F7F5FA;
      --card-white: #FFFFFF;
      --border-light: rgba(107,63,160,0.08);
      --shadow-sm: 0 4px 20px rgba(26,15,46,0.08);
      --shadow-md: 0 12px 32px rgba(26,15,46,0.15);
      --radius-card: 16px;
      --radius-btn: 12px;
      --transition: all 0.3s ease;
      --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-stack);
      background-color: #ffffff;
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 星光点状纹理背景 */
    .bg-stardust {
      background-color: var(--bg-light);
      background-image: radial-gradient(circle at 20% 30%, rgba(107,63,160,0.06) 1px, transparent 1px),
                        radial-gradient(circle at 80% 70%, rgba(245,176,66,0.05) 1px, transparent 1px);
      background-size: 60px 60px, 80px 80px;
    }
    /* 导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: rgba(26,15,46,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      height: 72px;
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(26,15,46,0.92), rgba(26,15,46,0.92)), linear-gradient(90deg, #6B3FA0, transparent);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      display: flex;
      align-items: center;
    }
    .nav-link {
      color: white;
      font-weight: 500;
      transition: var(--transition);
      position: relative;
      padding-bottom: 4px;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background-color: var(--starlight-gold);
      transition: width 0.3s ease;
    }
    .nav-link:hover {
      color: var(--starlight-gold);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    /* Mega Menu */
    .mega-trigger {
      color: white;
      font-weight: 500;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .mega-panel {
      position: absolute;
      top: 72px;
      left: 0;
      right: 0;
      background: white;
      border-radius: 0 0 16px 16px;
      box-shadow: 0 20px 40px rgba(26,15,46,0.2);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-10px);
      transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
      z-index: 40;
      padding: 32px 24px;
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 32px;
    }
    .mega-group:hover .mega-panel,
    .mega-group:focus-within .mega-panel {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .mega-card {
      background: #F9F7FC;
      border-radius: 12px;
      padding: 16px;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .mega-card:hover {
      border-color: var(--starlight-gold);
      background: white;
    }
    /* 汉堡菜单 */
    .mobile-menu-toggle {
      display: none;
    }
    #mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(26,15,46,0.98);
      backdrop-filter: blur(10px);
      z-index: 45;
      padding: 24px;
      flex-direction: column;
      gap: 16px;
      overflow-y: auto;
    }
    #mobile-menu.open {
      display: flex;
    }
    /* Hero */
    .hero-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-overlay {
      background: linear-gradient(135deg, rgba(26,15,46,0.85) 0%, rgba(107,63,160,0.6) 100%);
    }
    .floating-badge {
      background: rgba(26,15,46,0.7);
      backdrop-filter: blur(8px);
      border-radius: 12px;
      padding: 16px 20px;
      color: white;
    }
    .golden-text {
      background: linear-gradient(135deg, #F5B042 0%, #FFD68A 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    /* 卡片通用 */
    .service-card, .case-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .service-card:hover, .case-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-md);
    }
    .case-card:hover .case-img {
      transform: scale(1.04);
    }
    .case-img {
      transition: transform 0.4s ease;
    }
    /* 数据徽章 */
    .stat-badge {
      background: white;
      border-radius: 16px;
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }
    .stat-badge:hover {
      transform: scale(1.03);
      box-shadow: var(--shadow-md);
    }
    /* FAQ */
    details.faq-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 12px;
      border-left: 4px solid #E0D9ED;
      transition: var(--transition);
    }
    details.faq-item[open] {
      border-left: 6px solid var(--starlight-gold);
      background: #FDFBFF;
    }
    details summary {
      padding: 16px 20px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-primary);
    }
    details summary i {
      transition: transform 0.3s ease;
    }
    details[open] summary i {
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 20px 20px 20px;
      color: var(--text-secondary);
      background: #F7F5FA;
      margin: 0 12px 12px 12px;
      border-radius: 8px;
    }
    /* 按钮 */
    .btn-primary {
      background: var(--starlight-gold);
      color: #1A0F2E;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(245,176,66,0.3);
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: #E09E2D;
      box-shadow: 0 0 20px rgba(245,176,66,0.5);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--starlight-gold);
      color: var(--starlight-gold);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(245,176,66,0.1);
    }
    .text-link {
      color: var(--竞技绿);
      font-weight: 500;
      transition: var(--transition);
    }
    .text-link:hover {
      color: var(--starlight-gold);
      text-decoration: underline;
    }
    /* 页脚 */
    .footer-dark {
      background: #1A0F2E;
      color: #C0B8D0;
    }
    .footer-dark a {
      color: #C0B8D0;
      transition: var(--transition);
    }
    .footer-dark a:hover {
      color: var(--starlight-gold);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: flex; }
      .mega-panel { display: none; }
      .solutions-alt { flex-direction: column; }
    }
    @media (min-width: 1025px) {
      .mobile-menu-toggle { display: none; }
      #mobile-menu { display: none !important; }
    }
    @media (max-width: 640px) {
      .hero-title { font-size: 2rem; }
      .stat-grid { grid-template-columns: repeat(2,1fr); }
    }