/* roulang page: index */
:root {
      --primary-cyan: #00E5FF;
      --secondary-violet: #6C3CE0;
      --accent-coral: #FF5E7E;
      --bg-deep: #0A0E1A;
      --bg-card: rgba(15, 20, 35, 0.85);
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(0, 229, 255, 0.15);
      --text-white: #FFFFFF;
      --text-body: #B0C4DE;
      --text-muted: #6B7B8D;
      --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
      --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
      --shadow-hover-glow: 0 0 35px rgba(0, 229, 255, 0.6), 0 0 60px rgba(108, 60, 224, 0.4);
      --border-radius-card: 20px;
      --border-radius-btn: 50px;
      --border-radius-sm: 12px;
      --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.8;
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-white);
      font-weight: 700;
    }

    a {
      text-decoration: none;
      color: var(--primary-cyan);
      transition: var(--transition-smooth);
    }

    a:hover {
      color: var(--primary-cyan);
      opacity: 0.9;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 自定义容器 */
    .container-custom {
      width: 100%;
      max-width: 1320px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(10, 14, 26, 0.8);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.1);
      padding: 0.8rem 0;
      transition: var(--transition-smooth);
      z-index: 1050;
    }

    .navbar-brand {
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--primary-cyan), #6C3CE0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .logo-icon {
      font-size: 2rem;
      color: var(--primary-cyan);
      background: transparent;
    }

    .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      padding: 0.5rem 1rem !important;
      border-radius: 30px;
      transition: var(--transition-smooth);
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary-cyan) !important;
      background: rgba(0, 229, 255, 0.08);
    }

    .badge-activity {
      background: var(--accent-coral);
      color: white;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 0.25rem 0.9rem;
      border-radius: 30px;
      letter-spacing: 0.3px;
      margin-left: 0.5rem;
      animation: pulse-breath 2s infinite;
      box-shadow: 0 0 10px rgba(255, 94, 126, 0.6);
    }

    @keyframes pulse-breath {
      0% { box-shadow: 0 0 5px rgba(255, 94, 126, 0.5); }
      50% { box-shadow: 0 0 20px rgba(255, 94, 126, 0.9), 0 0 35px rgba(255, 94, 126, 0.4); }
      100% { box-shadow: 0 0 5px rgba(255, 94, 126, 0.5); }
    }

    .btn-primary-cta {
      background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--secondary-violet) 100%);
      border: none;
      color: white;
      font-weight: 700;
      letter-spacing: 0.5px;
      border-radius: var(--border-radius-btn);
      padding: 0.7rem 2rem;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
      transition: var(--transition-smooth);
    }

    .btn-primary-cta:hover {
      transform: translateY(-3px);
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.7), 0 0 45px rgba(108, 60, 224, 0.5);
      background: linear-gradient(135deg, #33ebff, #7b4fe0);
      color: white;
    }

    .btn-outline-ghost {
      background: transparent;
      border: 2px solid rgba(0, 229, 255, 0.5);
      color: var(--primary-cyan);
      border-radius: var(--border-radius-btn);
      padding: 0.7rem 2rem;
      font-weight: 600;
      transition: var(--transition-smooth);
    }

    .btn-outline-ghost:hover {
      background: rgba(0, 229, 255, 0.08);
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }

    /* Hero区域 */
    .hero-section {
      min-height: 100vh;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      align-items: center;
      color: white;
    }

    .hero-overlay {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(0, 229, 255, 0.08) 0%, rgba(10, 14, 26, 0.88) 80%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-tag {
      background: var(--accent-coral);
      display: inline-block;
      padding: 0.3rem 1.4rem;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      margin-bottom: 1.5rem;
      color: white;
    }

    .display-3 {
      font-size: clamp(2.8rem, 6vw, 4.5rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: white;
    }

    .text-gradient {
      background: linear-gradient(to right, var(--primary-cyan), var(--secondary-violet));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 区块标题 */
    .section-title {
      font-size: clamp(2rem, 4vw, 2.8rem);
      font-weight: 700;
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 60px;
      height: 4px;
      background: var(--primary-cyan);
      border-radius: 2px;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      padding: 2rem;
      transition: var(--transition-smooth);
      height: 100%;
    }

    .glass-card:hover {
      transform: translateY(-8px);
      border-color: rgba(0, 229, 255, 0.4);
      box-shadow: 0 20px 50px rgba(0, 229, 255, 0.12);
    }

    .stat-card {
      background: rgba(15, 22, 40, 0.9);
      border-radius: 16px;
      padding: 2rem 1.5rem;
      border-top: 4px solid var(--primary-cyan);
      text-align: center;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--primary-cyan);
      line-height: 1.2;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(14px);
      border: 1px solid rgba(0,229,255,0.12);
      border-radius: 20px;
      padding: 2rem;
    }

    .faq-accordion .accordion-button {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(0,229,255,0.1);
      border-radius: 12px !important;
      color: white;
      font-weight: 600;
      box-shadow: none;
    }

    .faq-accordion .accordion-button:not(.collapsed) {
      background: rgba(0,229,255,0.05);
      color: var(--primary-cyan);
      border-color: var(--primary-cyan);
    }

    .faq-accordion .accordion-body {
      background: transparent;
      color: var(--text-body);
    }

    .cta-full {
      background: linear-gradient(135deg, #2a1155 0%, #0A0E1A 90%);
      position: relative;
      overflow: hidden;
    }

    .footer-link {
      color: var(--text-muted);
      transition: color 0.2s;
    }

    .footer-link:hover {
      color: var(--primary-cyan);
    }

    .back-to-top {
      position: fixed;
      bottom: 30px;
      right: 30px;
      width: 48px;
      height: 48px;
      background: rgba(0,229,255,0.15);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(0,229,255,0.3);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-size: 1.3rem;
      z-index: 999;
      transition: var(--transition-smooth);
    }

    .back-to-top:hover {
      background: rgba(0,229,255,0.3);
      box-shadow: 0 0 25px var(--primary-cyan);
    }

    @media (max-width: 768px) {
      .navbar-collapse {
        background: rgba(10,14,26,0.95);
        backdrop-filter: blur(25px);
        padding: 1.5rem;
        border-radius: 20px;
        margin-top: 1rem;
      }
      .btn-primary-cta, .btn-outline-ghost {
        width: 100%;
        text-align: center;
      }
    }