/* roulang page: index */
:root {
      --deep-purple: #2D1B4E;
      --electric-purple: #9B59B6;
      --bright-gold: #F3C623;
      --dark-gold: #D4A017;
      --bg-dark: #0F0A1A;
      --card-bg: rgba(45, 27, 78, 0.7);
      --white: #ffffff;
      --light-gray: #e0e0e0;
      --text-muted: #b0a0c0;
      --border-glow: rgba(155, 89, 182, 0.5);
      --gold-shadow: rgba(243, 198, 35, 0.25);
      --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --border-radius-card: 16px;
      --border-radius-btn: 30px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--white);
      font-family: var(--font-body);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
    }

    a {
      text-decoration: none;
      transition: var(--transition);
    }

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

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(15, 10, 26, 0.8);
      backdrop-filter: blur(12px);
      padding: 12px 0;
      border-bottom: 1px solid rgba(155, 89, 182, 0.3);
      transition: var(--transition);
      z-index: 1000;
    }

    .navbar-brand {
      font-family: var(--font-heading);
      font-weight: 900;
      font-size: 1.8rem;
      color: var(--bright-gold) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 2rem;
      color: var(--bright-gold);
      filter: drop-shadow(0 0 8px var(--bright-gold));
    }

    .navbar-nav .nav-link {
      color: var(--white) !important;
      font-weight: 500;
      margin: 0 8px;
      padding: 8px 4px;
      position: relative;
      letter-spacing: 0.5px;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--bright-gold) !important;
    }

    .navbar-nav .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--bright-gold);
      transition: width 0.3s;
    }

    .navbar-nav .nav-link:hover::after,
    .navbar-nav .nav-link.active::after {
      width: 100%;
    }

    .btn-primary-gold {
      background: linear-gradient(135deg, var(--bright-gold), var(--dark-gold));
      border: none;
      color: var(--deep-purple);
      font-weight: 700;
      border-radius: var(--border-radius-btn);
      padding: 10px 24px;
      box-shadow: 0 4px 12px rgba(243, 198, 35, 0.3);
      transition: var(--transition);
      letter-spacing: 0.8px;
    }

    .btn-primary-gold:hover {
      background: var(--bright-gold);
      box-shadow: 0 0 22px var(--bright-gold);
      transform: translateY(-2px);
      color: #1a0f2e;
    }

    .badge-status {
      background: rgba(243, 198, 35, 0.15);
      color: var(--bright-gold);
      border: 1px solid var(--bright-gold);
      font-size: 0.8rem;
      padding: 4px 10px;
      border-radius: 20px;
    }

    .navbar-toggler {
      border-color: var(--bright-gold);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(243,198,35,0.9)' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #1a0f2e 0%, #2D1B4E 60%, #0F0A1A 100%);
      position: relative;
      overflow: hidden;
      padding: 120px 0 80px;
    }

    .hero-bg-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.2;
      pointer-events: none;
    }

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

    .hero-title {
      font-size: 3.5rem;
      font-weight: 900;
      background: linear-gradient(to right, #fff, #F3C623);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.2rem;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: #e0d0ff;
      max-width: 600px;
      margin-bottom: 2rem;
    }

    .btn-outline-gold {
      border: 2px solid var(--bright-gold);
      color: var(--bright-gold);
      background: transparent;
      border-radius: var(--border-radius-btn);
      padding: 10px 28px;
      font-weight: 600;
    }
    .btn-outline-gold:hover {
      background: var(--bright-gold);
      color: #0F0A1A;
      border-color: var(--bright-gold);
    }

    /* 板块通用 */
    .section-padding {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--white);
      margin-bottom: 16px;
      text-align: center;
    }
    .section-subtitle {
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* 卡片 */
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--border-glow);
      border-radius: var(--border-radius-card);
      padding: 28px 20px;
      box-shadow: 0 8px 24px rgba(243, 198, 35, 0.1);
      transition: var(--transition);
      height: 100%;
      backdrop-filter: blur(8px);
    }
    .card-custom:hover {
      border-color: var(--bright-gold);
      box-shadow: 0 12px 28px var(--gold-shadow);
      transform: translateY(-4px);
    }
    .icon-glow {
      font-size: 2.4rem;
      color: var(--bright-gold);
      margin-bottom: 16px;
      filter: drop-shadow(0 0 6px var(--bright-gold));
    }
    .card-title {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    /* 场景交替 */
    .scene-row {
      align-items: center;
      margin-bottom: 60px;
    }
    .scene-img {
      border-radius: 20px;
      box-shadow: 0 10px 30px rgba(155, 89, 182, 0.3);
    }

    /* 案例卡片 */
    .case-card {
      background: rgba(45, 27, 78, 0.8);
      border-radius: 20px;
      padding: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 20px;
      border: 1px solid #9B59B6;
      margin-bottom: 24px;
    }
    .case-stat {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--bright-gold);
      line-height: 1.2;
    }

    /* 价格卡 */
    .pricing-card {
      background: rgba(30, 20, 50, 0.9);
      border: 1px solid #9B59B6;
      border-radius: 20px;
      padding: 32px 24px;
      transition: var(--transition);
    }
    .pricing-card.popular {
      border: 2px solid var(--bright-gold);
      box-shadow: 0 0 28px rgba(243,198,35,0.3);
    }
    .price-num {
      font-size: 3rem;
      font-weight: 800;
      color: var(--bright-gold);
    }

    /* FAQ */
    .accordion-button {
      background: rgba(45,27,78,0.8);
      color: white;
      font-weight: 600;
      border: 1px solid #9B59B6;
      border-radius: 12px !important;
    }
    .accordion-button:not(.collapsed) {
      background: #3b2355;
      color: var(--bright-gold);
      box-shadow: 0 0 12px var(--bright-gold);
    }
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 12px;
    }

    .cta-banner {
      background: linear-gradient(120deg, #2D1B4E, #1a0f2e);
      border-top: 2px solid var(--bright-gold);
      border-bottom: 2px solid var(--bright-gold);
    }

    footer {
      background: #0b0616;
      color: #b0a0c0;
    }
    .footer-link {
      color: #c0b0d0;
    }
    .footer-link:hover {
      color: var(--bright-gold);
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .section-title {
        font-size: 2rem;
      }
      .navbar-brand {
        font-size: 1.5rem;
      }
    }