/* roulang page: index */
:root {
      --primary-gradient: linear-gradient(135deg, #FF5E3A 0%, #E8144B 100%);
      --primary-color: #FF5E3A;
      --primary-dark: #E8144B;
      --secondary-bg: #0B0F1A;
      --accent-gold: #D4AF37;
      --text-dark: #1E1E2F;
      --text-soft: #5A5A72;
      --text-light: #F0F0F5;
      --bg-white: #FFFFFF;
      --bg-light: #F7F8FA;
      --bg-dark: #0B0F1A;
      --border-light: rgba(0,0,0,0.06);
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.08);
      --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-btn: 50px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --transition-base: 0.3s ease;
      --header-height: 72px;
      --header-height-mobile: 56px;
    }

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

    body {
      font-family: var(--font-sans);
      line-height: 1.7;
      color: var(--text-dark);
      background-color: var(--bg-white);
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

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

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

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

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      z-index: 1000;
      border-bottom: 1px solid transparent;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
    }

    .site-header.scrolled {
      box-shadow: 0 8px 24px rgba(0,0,0,0.06);
      border-bottom: 1px solid rgba(255,94,58,0.25);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .logo-icon {
      font-size: 2.2rem;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 8px 0;
      font-size: 1rem;
      transition: color 0.2s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 3px;
      background: var(--primary-gradient);
      border-radius: 3px;
      transition: all 0.2s ease;
      transform: translateX(-50%);
    }

    .nav-links a:hover {
      color: var(--primary-color);
    }

    .nav-links a:hover::after {
      width: 20px;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.5px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 18px rgba(255,94,58,0.3);
      white-space: nowrap;
    }

    .btn-primary:hover {
      transform: scale(1.05);
      box-shadow: 0 14px 28px rgba(255,94,58,0.45);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s;
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: white;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        transition: right 0.4s ease;
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
        z-index: 999;
      }
      .nav-links.active {
        right: 0;
      }
      .menu-toggle {
        display: block;
        z-index: 1001;
      }
      .header-cta {
        display: none;
      }
      .nav-links .mobile-cta {
        display: block;
        margin-top: 20px;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: var(--secondary-bg);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 0;
      padding-top: var(--header-height);
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,15,26,0.85) 0%, rgba(20,20,35,0.7) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 500px;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      background: linear-gradient(to right, #fff, #FFB09C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 32px;
    }

    .hero-badges {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
      margin-top: 20px;
    }

    .badge {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(8px);
      border-radius: 40px;
      padding: 12px 20px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--accent-gold);
      font-weight: 600;
    }

    .section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--primary-gradient);
      border-radius: 4px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid var(--border-light);
    }

    .card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-md);
    }

    .bg-light { background-color: var(--bg-light); }
    .bg-dark { background-color: var(--bg-dark); color: white; }
    .text-center { text-align: center; }

    @media (max-width: 768px) {
      .hero h1 { font-size: 2.5rem; }
      .grid-3 { grid-template-columns: 1fr; }
      .section { padding: 60px 0; }
    }
    .footer-links a, .footer-bottom a { color: #ccc; }
    .footer-links a:hover { color: var(--accent-gold); }