/* roulang page: index */
@import url('/assets/css/vendor/0b67347532-css2.css');

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

    :root {
      --primary: #E63900;
      --primary-hover: #FF5A1F;
      --secondary: #00B4A6;
      --dark-bg: #0D0D0D;
      --darker-bg: #1A1A1A;
      --card-bg: rgba(20, 20, 20, 0.85);
      --text-primary: #FFFFFF;
      --text-secondary: #CCCCCC;
      --border-light: rgba(230, 57, 0, 0.3);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --shadow-card: 0 12px 28px rgba(0,0,0,0.6);
      --font-title: 'Bebas Neue', 'Source Han Sans CN', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    }

    body {
      font-family: var(--font-body);
      background: linear-gradient(135deg, #0A0A0A 0%, #1A1A1A 100%);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    /* 导航 */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: linear-gradient(180deg, rgba(10,10,10,0.95) 0%, rgba(20,20,20,0.7) 100%);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: all 0.3s ease;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 80px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: #fff;
      font-family: var(--font-title);
      font-size: 2rem;
      letter-spacing: 2px;
      transition: opacity 0.3s;
    }

    .logo:hover {
      opacity: 0.9;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #E63900, #FFB347);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #fff;
      box-shadow: 0 0 16px rgba(230,57,0,0.7);
    }

    .nav-menu {
      display: flex;
      gap: 2.5rem;
      list-style: none;
    }

    .nav-menu a {
      color: #DDD;
      text-decoration: none;
      font-weight: 500;
      position: relative;
      padding: 8px 0;
      transition: color 0.3s;
      font-size: 1rem;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
    }

    .nav-menu a:hover {
      color: #fff;
    }

    .nav-menu a:hover::after {
      width: 100%;
    }

    .cta-btn {
      background: var(--primary);
      color: #fff;
      padding: 12px 28px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: 0.3s ease;
      background: linear-gradient(135deg, #E63900, #D62B00);
      box-shadow: 0 6px 16px rgba(230,57,0,0.4);
    }

    .cta-btn:hover {
      background: var(--primary-hover);
      box-shadow: 0 10px 24px rgba(255,90,31,0.6);
      transform: translateY(-2px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      display: block;
      width: 28px;
      height: 3px;
      background: white;
      border-radius: 4px;
    }

    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(10,10,10,0.98);
        flex-direction: column;
        padding: 32px;
        gap: 28px;
        transform: translateX(-100%);
        transition: 0.4s ease;
        backdrop-filter: blur(20px);
      }
      .nav-menu.active {
        transform: translateX(0);
      }
      .hamburger {
        display: flex;
      }
      .desktop-cta {
        display: none;
      }
      .mobile-cta-bottom {
        display: block;
        position: fixed;
        bottom: 20px;
        left: 20px;
        right: 20px;
        z-index: 99;
      }
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 30%, transparent 10%, rgba(0,0,0,0.75) 80%);
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      text-align: center;
      max-width: 900px;
      padding: 0 24px;
      animation: fadeInUp 0.9s ease;
    }
    @keyframes fadeInUp {
      0% { opacity: 0; transform: translateY(40px); }
      100% { opacity: 1; transform: translateY(0); }
    }
    .hero h1 {
      font-family: var(--font-title);
      font-size: clamp(3rem, 8vw, 5rem);
      letter-spacing: 3px;
      text-shadow: 0 6px 24px black;
      margin-bottom: 1.5rem;
    }
    .hero p {
      font-size: 1.4rem;
      margin-bottom: 2.5rem;
      color: #DDD;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 40px;
      border-radius: 50px;
      font-weight: 700;
      text-decoration: none;
      transition: 0.3s;
    }
    .btn-primary:hover {
      background: #FF5A1F;
      box-shadow: 0 0 30px #FF5A1F;
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: #FFF;
      padding: 14px 40px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: 0.3s;
    }
    .btn-outline:hover {
      background: rgba(230,57,0,0.15);
    }

    section {
      padding: 100px 0;
    }

    .section-title {
      font-family: var(--font-title);
      font-size: 2. NBást">
    }