/* roulang page: index */
:root {
      --bg-deep: #0A0E17;
      --bg-card: #141C26;
      --primary-orange: #FF4D1C;
      --primary-orange-hover: #FF6933;
      --accent-cyan: #00E5A0;
      --text-primary: #E8ECF1;
      --text-secondary: #8899AA;
      --border-dim: #1E2A38;
      --border-glow: rgba(255, 77, 28, 0.35);
      --shadow-card: 0 4px 24px rgba(0,0,0,0.5);
      --shadow-hover: 0 8px 40px rgba(255,77,28,0.25);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --container-max: 1280px;
      --section-gap: 100px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      background-color: var(--bg-deep);
      color: var(--text-primary);
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      line-height: 1.75;
      letter-spacing: 0.3px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      transition: all 0.25s ease;
    }

    input, textarea {
      font-family: inherit;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 标题字体 */
    h1, h2, h3, .stat-number, .hero-title {
      font-weight: 700;
      line-height: 1.2;
    }

    /* 背景数字专用 */
    .din-number {
      font-family: "DIN Alternate", "Bebas Neue", "Impact", "Rajdhani", sans-serif;
      font-weight: 700;
    }

    .text-cyan {
      color: var(--accent-cyan);
    }

    .text-orange {
      color: var(--primary-orange);
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 0;
      transition: background 0.3s, box-shadow 0.3s, padding 0.2s;
      background: transparent;
    }

    .navbar.scrolled {
      background: rgba(10, 14, 23, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.6);
      padding: 10px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1336px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-size: 1.7rem;
      font-weight: 800;
      letter-spacing: 1px;
      color: white;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .logo span {
      color: var(--primary-orange);
    }

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

    .nav-link {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 1rem;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

    .nav-link:hover, .nav-link.active {
      color: white;
      border-bottom-color: var(--primary-orange);
    }

    .btn-primary {
      background: linear-gradient(135deg, #FF4D1C, #FF7A3D);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 14px rgba(255, 77, 28, 0.35);
    }

    .btn-primary:hover {
      box-shadow: 0 0 22px rgba(255, 77, 28, 0.65);
      transform: translateY(-1px);
      filter: brightness(1.08);
    }

    .btn-outline {
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      background: transparent;
    }

    .btn-outline:hover {
      background: rgba(0, 229, 160, 0.08);
      box-shadow: 0 0 14px rgba(0,229,160,0.4);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: white;
      transition: 0.2s;
    }

    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: #0A0E17;
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 40px;
      z-index: 999;
    }

    .mobile-menu a {
      font-size: 1.5rem;
      color: var(--text-primary);
    }

    /* Hero */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
      background-blend-mode: overlay;
    }

    .hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 30%, rgba(10,14,23,0.4) 0%, rgba(10,14,23,0.75) 80%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin-top: -40px;
    }

    .badge-tag {
      display: inline-block;
      background: rgba(255,77,28,0.15);
      color: #FF6933;
      padding: 6px 18px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: clamp(2.8rem, 8vw, 4.5rem);
      font-weight: 800;
      line-height: 1.2;
    }

    .hero-sub {
      color: var(--text-secondary);
      font-size: 1.2rem;
      margin: 20px 0 40px;
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
      flex-wrap: wrap;
    }

    .stat-badge {
      background: rgba(20,28,38,0.8);
      backdrop-filter: blur(8px);
      border: 1px solid #1E2A38;
      border-radius: 16px;
      padding: 18px 24px;
      text-align: center;
    }

    .stat-number {
      font-size: 2.5rem;
      background: linear-gradient(135deg, var(--primary-orange), #FFA56B);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 通用section */
    section {
      padding: var(--section-gap) 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-header h2 {
      font-size: 2.6rem;
      font-weight: 800;
    }

    .divider {
      width: 60px;
      height: 4px;
      background: var(--primary-orange);
      margin: 16px auto;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-lg);
      padding: 32px;
      transition: 0.25s;
    }
    .card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }

    .advantage-icon {
      font-size: 2.2rem;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }

    .team-card {
      background: #141C26;
      border-radius: 20px;
      overflow: hidden;
      position: relative;
      border: 1px solid #1F2A38;
    }

    .players-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .partner-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
      filter: grayscale(0.95);
    }
    .partner-wall img {
      height: 35px;
      opacity: 0.6;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .faq-item {
      background: #141C26;
      border-left: 4px solid var(--accent-cyan);
      padding: 16px 20px;
      border-radius: 8px;
      margin-bottom: 12px;
      cursor: pointer;
    }
    .faq-item.open {
      border-left-color: var(--primary-orange);
    }

    .contact-section {
      background: linear-gradient(145deg, #141C26 0%, #0F1620 100%);
     border-radius: 32px;
      display: flex;
      flex-wrap: wrap;
    }
    .contact-form input {
      background: #1B2532;
      border: 1px solid #2A3542;
      color: white;
      padding: 12px;
      border-radius: 8px;
      width: 100%;
    }

    footer {
      background: #0A0E17;
      border-top: 1px solid #1E2A38;
      padding: 60px 0 20px;
    }

    @media (max-width: 1024px) {
      :root { --section-gap: 70px; }
      .grid-3, .players-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero-title { font-size: 2.5rem; }
      .grid-2, .grid-3, .players-grid { grid-template-columns: 1fr; }
      .faq-grid { grid-template-columns: 1fr; }
    }