/* roulang page: index */
:root {
      --bg-deep: #0D0B1E;
      --bg-darker: #080617;
      --purple: #A855F7;
      --purple-dark: #7C3AED;
      --gold: #F59E0B;
      --green: #10B981;
      --glass-bg: rgba(255,255,255,0.04);
      --glass-border: rgba(168,85,247,0.18);
      --text-main: rgba(255,255,255,0.9);
      --text-muted: rgba(255,255,255,0.55);
      --font-mono: 'SF Mono', 'JetBrains Mono', 'Consolas', monospace;
      --radius-card: 16px;
      --radius-btn: 50px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.5);
      --shadow-glow: 0 0 24px rgba(168,85,247,0.35);
      --py-section: 5rem;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      background-color: var(--bg-deep);
      color: var(--text-main);
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 20% 10%, rgba(168,85,247,0.08) 0%, transparent 35%),
                        radial-gradient(circle at 80% 80%, rgba(245,158,11,0.05) 0%, transparent 40%);
    }
    
    a {
      text-decoration: none;
      color: var(--purple);
      transition: color 0.2s;
    }
    
    a:hover {
      color: var(--gold);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 自定义容器 */
    .container {
      max-width: 1140px;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
      margin-left: auto;
      margin-right: auto;
    }
    
    /* 按钮基础 */
    .btn {
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 0.75rem 1.8rem;
      transition: all 0.25s ease;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    
    .btn-primary-glow {
      background: linear-gradient(135deg, var(--purple), var(--purple-dark));
      color: white;
      border: 1px solid rgba(245,158,11,0.3);
      box-shadow: 0 0 20px rgba(245,158,11,0.25), 0 4px 15px rgba(0,0,0,0.3);
    }
    
    .btn-primary-glow:hover {
      box-shadow: 0 0 30px rgba(245,158,11,0.5), 0 8px 25px rgba(0,0,0,0.4);
      transform: scale(1.04);
      color: white;
    }
    
    .btn-outline-purple {
      background: transparent;
      border: 1.5px solid var(--purple);
      color: white;
      box-shadow: 0 0 10px rgba(168,85,247,0.2);
    }
    
    .btn-outline-purple:hover {
      background: rgba(168,85,247,0.12);
      border-color: var(--gold);
      box-shadow: 0 0 20px rgba(245,158,11,0.4);
      color: var(--gold);
    }
    
    /* 导航栏 */
    .navbar {
      background: rgba(13,11,30,0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(168,85,247,0.1);
      min-height: 64px;
      padding: 0.25rem 0;
      transition: background 0.3s, border-color 0.3s;
    }
    
    .navbar.scrolled {
      background: rgba(8,6,23,0.96);
      border-bottom: 1px solid var(--purple);
    }
    
    .navbar-brand {
      font-weight: 700;
      font-size: 1.4rem;
      background: linear-gradient(135deg, var(--purple), var(--gold));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }
    
    .navbar-brand i {
      background: none;
      -webkit-text-fill-color: var(--gold);
      font-size: 1.2rem;
    }
    
    .nav-link {
      color: rgba(255,255,255,0.7) !important;
      font-weight: 500;
      margin: 0 0.3rem;
      transition: 0.2s;
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--gold) !important;
    }
    
    .navbar-toggler {
      border-color: rgba(168,85,247,0.4);
    }
    
    .navbar-toggler-icon {
      filter: invert(0.8);
    }
    
    /* Hero 分屏 */
    .hero-section {
      padding: 6rem 0 5rem;
      display: flex;
      align-items: center;
      min-height: 85vh;
    }
    
    .hero-left {
      flex: 1 1 55%;
      padding-right: 2rem;
    }
    
    .hero-right {
      flex: 1 1 45%;
      position: relative;
    }
    
    .hero-bg-card {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 2rem;
      min-height: 380px;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(168,85,247,0.25);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    }
    
    .hero-overlay-card {
      position: absolute;
      bottom: 2rem;
      right: -1rem;
      background: rgba(13,11,30,0.8);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(168,85,247,0.3);
      border-radius: 16px;
      padding: 1rem 1.8rem;
      color: white;
      box-shadow: var(--shadow-glow);
    }
    
    h1 {
      font-size: clamp(2.4rem, 6vw, 3.8rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    
    .gold-text {
      color: var(--gold);
    }
    
    /* 数据指标 */
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.4rem;
      font-weight: 700;
    }
    
    .stat-label {
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    
    .stat-card {
      background: var(--glass-bg);
      backdrop-filter: blur(22px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 1.8rem 1.2rem;
      box-shadow: var(--shadow-card);
    }
    
    /* 服务卡片 */
    .service-card {
      background: rgba(168,85,247,0.05);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      transition: all 0.3s;
      height: 100%;
    }
    
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 0 30px rgba(168,85,247,0.4);
      border-color: var(--purple);
    }
    
    .compare-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid rgba(255,255,255,0.08);
    }
    
    .compare-card.win {
      border-color: var(--purple);
      box-shadow: 0 0 30px rgba(168,85,247,0.3);
    }
    
    .accordion-button {
      background: rgba(13,11,30,0.9);
      color: white;
      font-weight: 600;
      border: 1px solid rgba(168,85,247,0.15);
    }
    
    .accordion-button:not(.collapsed) {
      background: rgba(168,85,247,0.12);
      color: var(--gold);
      border-color: var(--purple);
    }
    
    footer {
      background: var(--bg-darker);
      border-top: 1px solid rgba(168,85,247,0.2);
    }
    
    .social-icon {
      width: 40px;
      height: 40px;
      border: 1px solid var(--purple);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: white;
      transition: 0.2s;
    }
    
    .social-icon:hover {
      background: var(--gold);
      border-color: var(--gold);
      color: black;
    }
    
    @media (max-width: 768px) {
      .hero-section {
        flex-direction: column;
        padding-top: 5rem;
      }
      .hero-left, .hero-right {
        padding-right: 0;
        width: 100%;
      }
      .navbar-collapse {
        background: rgba(8,6,23,0.98);
        padding: 1rem;
      }
    }