/* roulang page: index */
:root {
      --primary-neon: #39FF14;
      --primary-hover: #5EFF33;
      --secondary-purple: #2D0A4D;
      --accent-blue: #00F0FF;
      --bg-deep: #0B001A;
      --bg-card: rgba(15, 5, 30, 0.85);
      --text-white: #FFFFFF;
      --text-light-purple: #D1C4E9;
      --text-gray: #9E9E9E;
      --border-glow: rgba(57, 255, 20, 0.2);
      --shadow-card: 0 0 20px rgba(57, 255, 20, 0.08);
      --shadow-hover: 0 0 35px rgba(57, 255, 20, 0.25);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --nav-width: 280px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      background: radial-gradient(circle at 20% 10%, #2D0A4D, #0B001A 80%);
      color: var(--text-light-purple);
      margin: 0;
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-weight: 700;
      color: var(--text-white);
    }
    
    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      font-weight: 700;
    }
    
    h2 {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 1.5rem;
    }
    
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    
    .text-neon {
      color: var(--primary-neon);
    }
    
    .text-accent {
      color: var(--accent-blue);
    }
    
    .bg-card-style {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      backdrop-filter: blur(2px);
    }
    
    /* 导航分屏布局 */
    .app-wrapper {
      display: flex;
      min-height: 100vh;
    }
    
    .vertical-nav {
      width: var(--nav-width);
      background: rgba(10, 2, 30, 0.95);
      backdrop-filter: blur(10px);
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2rem 1.5rem;
      position: fixed;
      top: 0;
      left: 0;
      height: 100vh;
      z-index: 1050;
      border-right: 1px solid rgba(57, 255, 20, 0.15);
      transition: transform 0.3s ease;
    }
    
    .nav-logo {
      font-family: 'Orbitron', sans-serif;
      font-weight: 800;
      font-size: 24px;
      color: var(--primary-neon);
      text-decoration: none;
      margin-bottom: 3rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-logo i {
      font-size: 28px;
      color: var(--accent-blue);
    }
    
    .nav-menu {
      list-style: none;
      padding: 0;
      margin: 0;
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }
    
    .nav-menu li a {
      display: block;
      padding: 0.8rem 1.2rem;
      color: var(--text-light-purple);
      text-decoration: none;
      font-weight: 500;
      border-left: 3px solid transparent;
      transition: all 0.25s ease;
      border-radius: 0 6px 6px 0;
      font-size: 16px;
      letter-spacing: 0.3px;
    }
    
    .nav-menu li a:hover,
    .nav-menu li a.active {
      color: var(--primary-neon);
      border-left-color: var(--primary-neon);
      background: rgba(57, 255, 20, 0.05);
    }
    
    .main-content {
      margin-left: var(--nav-width);
      width: calc(100% - var(--nav-width));
      background: transparent;
    }
    
    /* Hero */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 2rem;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 10% 30%, rgba(45,10,77,0.7) 0%, rgba(11,0,26,0.9) 90%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }
    
    .btn-primary-custom {
      background: var(--primary-neon);
      color: #2D0A4D;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      border: none;
      transition: all 0.3s;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 25px var(--primary-neon);
      transform: translateY(-2px);
      color: #1a0033;
    }
    .btn-outline-neon {
      border: 2px solid var(--primary-neon);
      color: var(--primary-neon);
      background: transparent;
      font-weight: 600;
      padding: 12px 34px;
      border-radius: var(--radius-btn);
      transition: 0.3s;
    }
    .btn-outline-neon:hover {
      background: rgba(57,255,20,0.1);
      box-shadow: 0 0 20px rgba(57,255,20,0.3);
      color: var(--primary-neon);
    }
    
    .marquee {
      color: var(--accent-blue);
      font-weight: 500;
      margin-top: 2rem;
    }
    
    /* 卡片 */
    .feature-card {
      padding: 2rem;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-neon);
    }
    .icon-circle {
      font-size: 2.4rem;
      color: var(--primary-neon);
      margin-bottom: 1.2rem;
    }
    
    .service-img {
      border-radius: 12px;
      object-fit: cover;
      width: 100%;
      height: 280px;
      border: 1px solid var(--border-glow);
    }
    
    .stat-number {
      font-family: 'Orbitron', sans-serif;
      font-size: 56px;
      font-weight: 800;
      color: var(--primary-neon);
    }
    
    .case-card {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-card);
      border: 1px solid var(--border-glow);
    }
    .case-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: 0.4s;
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      color: white;
      padding: 1.5rem 1rem;
      width: 100%;
    }
    
    .accordion-button {
      background: var(--bg-card);
      color: white;
      font-weight: 600;
      border: 1px solid var(--border-glow);
      border-radius: 8px !important;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(57,255,20,0.1);
      color: var(--primary-neon);
      box-shadow: none;
    }
    
    footer {
      background: #050010;
      border-top: 1px solid rgba(57,255,20,0.2);
    }
    
    /* 移动端 */
    @media (max-width: 991px) {
      .vertical-nav {
        transform: translateX(-100%);
        width: 260px;
      }
      .mobile-nav-open .vertical-nav {
        transform: translateX(0);
      }
      .main-content {
        margin-left: 0;
        width: 100%;
      }
      .mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.8rem 1.5rem;
        background: rgba(10,2,30,0.95);
        position: fixed;
        top: 0;
        width: 100%;
        z-index: 1040;
      }
    }
    @media (min-width: 992px) {
      .mobile-header { display: none; }
    }