/* roulang page: index */
:root {
      --gold: #C9A84C;
      --gold-hover: #DDBF6A;
      --gold-glow: rgba(201, 168, 76, 0.25);
      --dark-bg: #1B1E2B;
      --darker-bg: #151720;
      --parchment: #F5F0E8;
      --accent-red: #D94E3C;
      --text-primary: #E0DDD8;
      --text-secondary: #9B9890;
      --text-on-dark: #1B1E2B;
      --border-gold: rgba(201, 168, 76, 0.3);
      --border-strong: rgba(201, 168, 76, 0.8);
      --card-bg: rgba(27, 30, 43, 0.75);
      --radius: 8px;
      --radius-sm: 6px;
      --shadow-gold: 0 0 18px rgba(201, 168, 76, 0.2);
      --font-heading: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
      --font-number: 'DIN Alternate', 'Bebas Neue', 'PingFang SC', sans-serif;
      --max-width: 1280px;
      --header-height: 72px;
    }

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

    body {
      font-family: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--dark-bg);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: var(--gold);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--gold-hover);
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      outline: none;
    }

    /* 导航 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: linear-gradient(to bottom, #1B1E2B 0%, #1B1E2B 80px, transparent 100%);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }
    #header.scrolled {
      background: #1B1E2B;
      box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-height);
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      flex-direction: column;
    }
    .logo-main {
      font-size: 24px;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 2px;
      line-height: 1.2;
    }
    .logo-sub {
      font-size: 12px;
      color: #9B9890;
      letter-spacing: 1px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      color: #E0DDD8;
      font-weight: 500;
      font-size: 15px;
      transition: color 0.2s, border-bottom 0.2s;
      border-bottom: 2px solid transparent;
      padding-bottom: 4px;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--gold);
      border-bottom-color: var(--gold);
    }
    .btn-gold {
      background: var(--gold);
      color: var(--text-on-dark);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      transition: background 0.2s;
    }
    .btn-gold:hover {
      background: var(--gold-hover);
      color: var(--text-on-dark);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--gold);
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 280px;
      height: 100vh;
      background: #151720;
      border-left: 1px solid rgba(201,168,76,0.3);
      display: flex;
      flex-direction: column;
      padding: 32px 24px;
      gap: 24px;
      transition: right 0.3s ease;
      z-index: 999;
    }
    .mobile-menu.open {
      right: 0;
    }
    .mobile-menu a {
      font-size: 18px;
      padding: 12px 0;
      border-bottom: 1px solid rgba(201,168,76,0.2);
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
    }

    /* Hero */
    #hero {
      padding: 180px 0 120px;
      position: relative;
      background: radial-gradient(circle at 80% 20%, #1B1E2B 0%, #0e1018 100%);
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-text {
      flex: 1;
      z-index: 2;
    }
    .hero-text h1 {
      font-family: var(--font-heading);
      font-size: 48px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: #C9C6BF;
      margin-bottom: 32px;
      max-width: 520px;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-outline {
      border: 1px solid var(--gold);
      background: transparent;
      color: var(--gold);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: all 0.2s;
    }
    .btn-outline:hover {
      background: rgba(201,168,76,0.15);
    }
    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 400px;
      border-radius: var(--radius);
      position: relative;
      border: 1px solid var(--border-gold);
    }
    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: var(--gold);
      border-radius: 50%;
      opacity: 0.6;
      animation: float 6s infinite alternate ease-in-out;
    }
    @keyframes float {
      0% { transform: translateY(0px); opacity: 0.5; }
      100% { transform: translateY(-30px); opacity: 0.9; }
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column-reverse;
      }
      .hero-text h1 {
        font-size: 34px;
      }
      .hero-image {
        min-height: 280px;
        width: 100%;
      }
    }

    section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .section-sub {
      color: #9B9890;
      font-size: 16px;
      margin-bottom: 48px;
    }

    /* about 数据卡 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .stats {
      display: flex;
      gap: 32px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 52px;
      font-weight: 700;
      color: var(--gold);
    }
    .stat-label {
      color: #9B9890;
    }
    @media (max-width: 768px) {
      .about-grid {
        grid-template-columns: 1fr;
      }
      .stats {
        justify-content: center;
      }
      .stat-number {
        font-size: 40px;
      }
    }

    /* 卡片阵列 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius);
      padding: 32px;
      transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    }
    .card:hover {
      transform: translateY(-5px);
      border-color: var(--border-strong);
      box-shadow: var(--shadow-gold);
    }
    .card-icon {
      font-size: 48px;
      color: var(--gold);
      margin-bottom: 16px;
    }
    .card h3 {
      font-size: 22px;
      margin-bottom: 12px;
      color: #fff;
    }
    @media (max-width: 1024px) {
      .card-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .card-grid { grid-template-columns: 1fr; }
    }

    /* 横向滚动 roster */
    .roster-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      padding-bottom: 12px;
    }
    .roster-card {
      flex: 0 0 280px;
      scroll-snap-align: start;
      background: var(--card-bg);
      border-radius: var(--radius);
      border: 1px solid var(--border-gold);
      padding: 16px;
      transition: 0.3s;
    }
    .roster-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      border-radius: 6px;
      filter: grayscale(0.6);
      transition: 0.3s;
    }
    .roster-card:hover img {
      filter: grayscale(0);
    }
    .roster-info h3 {
      margin-top: 12px;
      font-size: 20px;
      color: white;
    }
    @media (max-width: 768px) {
      .roster-card { flex: 0 0 220px; }
    }

    /* partners */
    .partner-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
      justify-content: center;
      align-items: center;
    }
    .partner-item {
      width: 100px;
      filter: grayscale(1);
      transition: 0.3s;
    }
    .partner-item:hover {
      filter: grayscale(0);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-left: 3px solid var(--gold);
      margin-bottom: 16px;
      background: rgba(27,30,43,0.6);
      border-radius: 0 6px 6px 0;
      padding: 16px 24px;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      display: none;
      margin-top: 12px;
      color: #C9C6BF;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA banner */
    #cta-banner {
      background: linear-gradient(90deg, #1B1E2B 0%, #2a2418 100%);
      text-align: center;
    }
    .btn-red {
      background: var(--accent-red);
      color: white;
      font-weight: 700;
      padding: 16px 40px;
      border-radius: var(--radius-sm);
      margin-top: 24px;
    }

    /* contact form */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    input, textarea, select {
      background: #0f111a;
      border: none;
      border-bottom: 1px solid rgba(201,168,76,0.5);
      padding: 12px 8px;
      color: white;
      width: 100%;
      margin-bottom: 16px;
      outline: none;
    }
    input:focus, textarea:focus {
      border-bottom: 2px solid var(--gold);
    }
    @media (max-width: 768px) {
      .contact-grid { grid-template-columns: 1fr; }
    }

    footer {
      background: #151720;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }