/* roulang page: index */
:root {
      --primary-neon-purple: #8B00FF;
      --primary-deep-purple: #4B0082;
      --accent-electric-orange: #FF6A00;
      --bg-dark-charcoal: #0D0D0D;
      --bg-mid-gray: #1A1A2E;
      --card-bg: rgba(20, 20, 40, 0.8);
      --card-border: rgba(139, 0, 255, 0.4);
      --text-white: #FFFFFF;
      --text-light-gray: #B0B0C0;
      --text-muted: #8888A0;
      --border-radius-card: 12px;
      --border-radius-btn: 50px;
      --shadow-card: 0 4px 20px rgba(139, 0, 255, 0.15);
      --shadow-card-hover: 0 8px 30px rgba(139, 0, 255, 0.3);
      --transition-base: 0.25s ease-in-out;
      --font-numbers: 'Orbitron', sans-serif;
      --font-system: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-system);
      background: linear-gradient(180deg, var(--bg-dark-charcoal) 0%, var(--bg-mid-gray) 100%);
      color: var(--text-light-gray);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      letter-spacing: 0.2px;
    }
    
    h1, h2, h3, h4, .nav-link, .btn, .data-number {
      font-family: var(--font-system);
    }
    
    .data-number, .english-accent {
      font-family: var(--font-numbers);
    }
    
    /* 容器自定义 */
    .container-custom {
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    @media (max-width: 768px) {
      .container-custom {
        padding: 0 20px;
      }
    }
    
    /* 导航栏重塑 */
    .navbar {
      background: rgba(13, 13, 13, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(139, 0, 255, 0.3);
      padding: 12px 0;
      transition: var(--transition-base);
    }
    
    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-white) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .navbar-brand i {
      color: var(--accent-electric-orange);
      font-size: 1.8rem;
    }
    
    .navbar-nav .nav-link {
      color: var(--text-light-gray) !important;
      font-weight: 500;
      margin: 0 8px;
      padding: 8px 12px;
      border-radius: 6px;
      transition: var(--transition-base);
      font-size: 0.95rem;
      position: relative;
    }
    
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--text-white) !important;
      background: rgba(139, 0, 255, 0.1);
    }
    
    .navbar-nav .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 12px;
      right: 12px;
      height: 2px;
      background: var(--accent-electric-orange);
    }
    
    .navbar-toggler {
      border: 1px solid rgba(139, 0, 255, 0.5);
      padding: 6px 10px;
    }
    
    .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(255, 255, 255, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    
    /* 移动端菜单全屏覆盖 */
    @media (max-width: 992px) {
      .navbar-collapse {
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(12px);
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 1050;
      }
      .navbar-nav {
        text-align: center;
      }
      .navbar-nav .nav-link {
        font-size: 1.3rem;
        margin: 12px 0;
      }
      .navbar-toggler {
        z-index: 1060;
      }
    }
    
    /* 区块间距 */
    section {
      padding: 80px 0;
      position: relative;
    }
    
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }
    
    /* Hero 区域 */
    #hero {
      min-height: 100vh;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      display: flex;
      align-items: center;
      position: relative;
    }
    
    #hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(135deg, rgba(75,0,130,0.75) 0%, rgba(13,13,13,0.85) 100%);
      z-index: 1;
    }
    
    #hero .container-custom {
      position: relative;
      z-index: 2;
    }
    
    .hero-title {
      font-size: clamp(2.2rem, 5vw, 3.5rem);
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-white);
      text-shadow: 0 0 20px rgba(139,0,255,0.5);
    }
    
    .hero-sub {
      color: var(--text-light-gray);
      font-size: 1.2rem;
    }
    
    /* 按钮系统 */
    .btn-primary-custom {
      background: var(--accent-electric-orange);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-base);
      box-shadow: 0 4px 15px rgba(255,106,0,0.3);
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    
    .btn-primary-custom:hover {
      background: #E55D00;
      box-shadow: 0 0 20px rgba(255,106,0,0.7);
      transform: scale(1.03);
      color: white;
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-neon-purple);
      color: var(--primary-neon-purple);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-base);
    }
    
    .btn-outline-custom:hover {
      background: var(--primary-neon-purple);
      color: white;
      box-shadow: 0 0 15px rgba(139,0,255,0.5);
    }
    
    /* 区块标题 */
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    
    .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background: var(--accent-electric-orange);
      margin-top: 10px;
      border-radius: 2px;
    }
    
    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-card);
      padding: 28px;
      transition: var(--transition-base);
      box-shadow: var(--shadow-card);
      height: 100%;
    }
    
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-electric-orange);
    }
    
    /* 优势非对称网格 */
    .feature-large {
      grid-column: span 2;
    }
    .feature-small {
      grid-column: span 1;
    }
    
    /* 产品左右交替 */
    .product-row {
      display: flex;
      align-items: center;
      margin-bottom: 60px;
      gap: 40px;
    }
    .product-row.reverse {
      flex-direction: row-reverse;
    }
    .product-img img {
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    }
    
    /* 场景卡片 */
    .scenario-card {
      background-size: cover;
      background-position: center;
      border-radius: 12px;
      height: 280px;
      position: relative;
      overflow: hidden;
      transition: var(--transition-base);
    }
    .scenario-card:hover .scenario-img {
      transform: scale(1.05);
    }
    .scenario-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scenario-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      padding: 20px;
      color: white;
    }
    
    /* 案例数字 */
    .data-number {
      font-size: 2.8rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary-neon-purple), #ffffff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    /* 价格卡片高亮 */
    .pricing-highlight {
      border: 2px solid var(--accent-electric-orange) !important;
      position: relative;
    }
    .badge-popular {
      background: var(--accent-electric-orange);
      color: black;
      font-weight: bold;
      position: absolute;
      top: -12px;
      right: 20px;
      padding: 5px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
    }
    
    /* FAQ */
    .accordion-button {
      background: rgba(20,20,40,0.9);
      color: white;
      font-weight: 600;
      border: 1px solid rgba(139,0,255,0.3);
      border-radius: 8px !important;
      transition: var(--transition-base);
    }
    .accordion-button:not(.collapsed) {
      background: rgba(139,0,255,0.15);
      color: white;
      box-shadow: none;
    }
    .accordion-button::after {
      filter: brightness(0) invert(1);
    }
    
    /* CTA 横幅 */
    #cta {
      background: radial-gradient(circle at center, #3a0a5e, #0d0d0d);
    }
    
    /* 页脚 */
    footer {
      background: #0A0A0A;
      border-top: 1px solid rgba(139,0,255,0.4);
    }
    
    @media (max-width: 768px) {
      .product-row {
        flex-direction: column !important;
      }
    }