/* roulang page: index */
:root {
      --deep-bg: #0A0E27;
      --card-bg: rgba(255,255,255,0.05);
      --section-bg: #111640;
      --cyan: #00F0FF;
      --hot-red: #FF4D6A;
      --white: #FFFFFF;
      --text-muted: rgba(255,255,255,0.7);
      --border-light: rgba(255,255,255,0.1);
      --border-cyan: rgba(0,240,255,0.5);
      --shadow-cyan: 0 0 20px rgba(0,240,255,0.5);
      --shadow-red: 0 0 25px rgba(255,77,106,0.6);
      --glass-blur: blur(20px);
      --border-radius-card: 16px;
      --border-radius-btn: 50px;
      --border-radius-badge: 20px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-bg);
      color: var(--white);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }
    
    /* 排版重置 */
    h1, h2, h3, h4, p {
      margin: 0;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    
    img {
      max-width: 100%;
      display: block;
    }
    
    /* 容器微调 */
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* 导航栏 */
    .navbar-custom {
      background: rgba(10,14,39,0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      padding: 0.8rem 0;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
    }
    
    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--cyan);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .logo-text i {
      font-size: 2rem;
    }
    
    .nav-link-item {
      color: rgba(255,255,255,0.8);
      margin: 0 12px;
      font-weight: 500;
      position: relative;
      padding: 4px 0;
    }
    
    .nav-link-item:hover,
    .nav-link-item.active {
      color: var(--cyan);
    }
    
    .nav-link-item::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan);
      transition: width 0.3s;
    }
    
    .nav-link-item:hover::after,
    .nav-link-item.active::after {
      width: 100%;
    }
    
    .countdown-badge {
      background: rgba(255,77,106,0.15);
      border: 1px solid var(--hot-red);
      color: var(--hot-red);
      padding: 0.4rem 1rem;
      border-radius: var(--border-radius-badge);
      font-weight: 600;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .btn-cyan {
      background: var(--cyan);
      color: #0A0E27;
      font-weight: 700;
      border: none;
      padding: 0.6rem 1.5rem;
      border-radius: var(--border-radius-btn);
      box-shadow: var(--shadow-cyan);
      transition: all 0.3s;
    }
    
    .btn-cyan:hover {
      box-shadow: 0 0 30px rgba(0,240,255,0.8);
      transform: scale(1.05);
      color: #0A0E27;
    }
    
    .btn-outline-cyan {
      background: transparent;
      border: 2px solid var(--cyan);
      color: var(--cyan);
      font-weight: 600;
      padding: 0.6rem 1.8rem;
      border-radius: var(--border-radius-btn);
      transition: all 0.3s;
    }
    
    .btn-outline-cyan:hover {
      background: rgba(0,240,255,0.1);
      color: var(--cyan);
      border-color: var(--cyan);
    }
    
    .btn-red {
      background: var(--hot-red);
      color: white;
      font-weight: 700;
      border: none;
      padding: 0.8rem 2rem;
      border-radius: var(--border-radius-btn);
      box-shadow: var(--shadow-red);
      transition: all 0.3s;
    }
    
    .btn-red:hover {
      box-shadow: 0 0 35px rgba(255,77,106,0.9);
      transform: scale(1.05);
      color: white;
    }
    
    /* Hero 区域 */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(10,14,39,0.85) 0%, rgba(17,22,64,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
    }
    
    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: 2px;
      color: var(--white);
      text-shadow: 0 0 20px rgba(0,240,255,0.3);
    }
    
    .hero-sub {
      color: rgba(255,255,255,0.85);
      font-size: 1.2rem;
      max-width: 700px;
      margin: 1.2rem auto 2rem;
    }
    
    .floating-status {
      position: absolute;
      bottom: 30px;
      right: 30px;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(15px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 40px;
      padding: 0.6rem 1.4rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 500;
      box-shadow: 0 8px 20px rgba(0,0,0,0.5);
    }
    
    .pulse-dot {
      width: 12px;
      height: 12px;
      background: var(--hot-red);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
    }
    
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,77,106,0.7); }
      70% { box-shadow: 0 0 0 10px rgba(255,77,106,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,77,106,0); }
    }
    
    /* 通用区块 */
    .section-padding {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 1rem;
      position: relative;
    }
    
    .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background: linear-gradient(90deg, var(--cyan), transparent);
      margin-top: 0.5rem;
    }
    
    /* 玻璃卡片 */
    .glass-card {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--border-radius-card);
      box-shadow: 0 8px 32px rgba(0,0,0,0.4);
      padding: 2rem 1.5rem;
      transition: all 0.3s ease;
      height: 100%;
    }
    
    .glass-card:hover {
      transform: translateY(-8px);
      border-color: var(--cyan);
      box-shadow: 0 12px 40px rgba(0,240,255,0.15);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(0,240,255,0.15);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: var(--cyan);
      margin-bottom: 1.2rem;
    }
    
    .stats-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--cyan);
      font-variant-numeric: tabular-nums;
    }
    
    .case-card {
      position: relative;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      background: #111640;
      transition: transform 0.3s;
    }
    
    .case-card:hover {
      transform: translateY(-5px);
    }
    
    .case-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      padding: 1.5rem;
    }
    
    .badge-hot {
      background: var(--hot-red);
      color: white;
      border-radius: var(--border-radius-badge);
      padding: 0.2rem 1rem;
      font-size: 0.8rem;
      font-weight: 600;
    }
    
    .solution-card {
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--border-radius-card);
      background: rgba(255,255,255,0.03);
      padding: 2rem;
      transition: all 0.3s;
    }
    
    .solution-highlight {
      border: 2px solid var(--cyan);
      box-shadow: 0 0 25px rgba(0,240,255,0.2);
      background: rgba(0,240,255,0.05);
    }
    
    .accordion-button {
      background: rgba(255,255,255,0.03);
      color: white;
      font-weight: 500;
      border: none;
      border-left: 4px solid transparent;
    }
    
    .accordion-button:not(.collapsed) {
      background: rgba(0,240,255,0.05);
      color: var(--cyan);
      border-left: 4px solid var(--cyan);
      box-shadow: none;
    }
    
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--cyan);
    }
    
    .cta-section {
      background: #111640;
      background-image: radial-gradient(circle at 30% 20%, rgba(0,240,255,0.1) 0%, transparent 40%);
    }
    
    footer {
      background: #0A0E27;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    
    .footer-link {
      color: rgba(255,255,255,0.6);
      transition: color 0.2s;
    }
    
    .footer-link:hover {
      color: var(--cyan);
    }
    
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .glass-card {
        backdrop-filter: none;
        background: rgba(255,255,255,0.08);
      }
      .floating-status {
        bottom: 15px;
        right: 15px;
        font-size: 0.8rem;
      }
      .navbar-custom .btn-cyan {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
      }
    }