/* roulang page: index */
:root {
      --deep-wine: #6B0F1C;
      --burgundy: #800020;
      --champagne-gold: #D4AF37;
      --warm-gold: #C9A96E;
      --dark-bg: #1A1110;
      --charcoal: #1C1515;
      --dark-brown: #2A1F1D;
      --chocolate: #2B1B17;
      --ivory-light: #F5F0EB;
      --ivory-white: #FFF8F0;
      --text-body: #E5D9D3;
      --text-muted: #C2B2AA;
      --text-white: #FFFFFF;
      --shadow-gold: rgba(212, 175, 55, 0.15);
      --shadow-wine: rgba(107, 15, 28, 0.6);
      --border-gold-dim: rgba(212, 175, 55, 0.3);
      --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'Times New Roman', serif;
      --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-numbers: 'Playfair Display', 'Cinzel', 'Cormorant Garamond', serif;
      --section-gap: 5rem;
      --card-radius: 8px;
      --btn-radius: 4px;
      --container-max: 1280px;
    }

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

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

    body {
      background-color: var(--dark-bg);
      color: var(--text-body);
      font-family: var(--font-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.5rem;
      width: 100%;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 600;
    }

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

    a:hover {
      color: #f0e3a5;
    }

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-body);
      font-weight: 500;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: transparent;
      transition: background 0.35s ease, box-shadow 0.35s ease;
      padding: 0.75rem 0;
    }

    .header.scrolled {
      background: rgba(20, 14, 12, 0.92);
      backdrop-filter: blur(6px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.7);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    .logo {
      font-family: var(--font-heading);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--champagne-gold);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      white-space: nowrap;
    }

    .logo-icon {
      width: 24px;
      height: 24px;
      background: var(--champagne-gold);
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      display: inline-block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.8rem;
      list-style: none;
      font-weight: 500;
    }

    .nav-links a {
      color: var(--text-body);
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      padding: 0.4rem 0;
      position: relative;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 1.5px;
      background: var(--champagne-gold);
      transition: width 0.3s;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 1.2rem;
    }

    .search-box {
      background: transparent;
      border: 1px solid var(--border-gold-dim);
      border-radius: 20px;
      padding: 0.5rem 1rem;
      color: var(--text-white);
      font-size: 0.9rem;
      width: 160px;
      outline: none;
      transition: border 0.3s;
    }

    .search-box::placeholder {
      color: var(--text-muted);
      font-size: 0.8rem;
    }

    .search-box:focus {
      border-color: var(--champagne-gold);
    }

    .btn-login {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 0.45rem 1.3rem;
      border-radius: 20px;
      font-size: 0.9rem;
    }

    .btn-login:hover {
      background: rgba(212,175,55,0.12);
    }

    .btn-enter {
      background: var(--deep-wine);
      color: var(--champagne-gold);
      border: none;
      padding: 0.55rem 1.6rem;
      border-radius: 20px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 10px var(--shadow-wine);
    }

    .btn-enter:hover {
      background: #7a1a2a;
      box-shadow: 0 0 15px rgba(212,175,55,0.5);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 22px;
      height: 2px;
      background: var(--champagne-gold);
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 95vh;
      display: flex;
      align-items: center;
      position: relative;
      color: white;
      margin-top: 0;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(26,17,16,0.7) 0%, rgba(54,15,20,0.8) 70%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
      padding: 2rem 1.5rem;
    }

    .hero h1 {
      font-size: clamp(2.2rem, 6vw, 4rem);
      color: var(--champagne-gold);
      text-shadow: 0 4px 18px rgba(0,0,0,0.9);
      line-height: 1.2;
      margin-bottom: 1.2rem;
      letter-spacing: -0.5px;
    }

    .hero .subtitle {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 2.5rem;
      font-weight: 400;
    }

    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--deep-wine);
      color: var(--champagne-gold);
      border: none;
      padding: 0.9rem 2.2rem;
      border-radius: var(--btn-radius);
      font-weight: 700;
      font-size: 1rem;
      box-shadow: 0 4px 15px var(--shadow-wine);
      transition: 0.3s;
    }

    .btn-primary:hover {
      background: #8b1a2b;
      box-shadow: 0 0 22px rgba(212,175,55,0.6);
      transform: translateY(-2px);
    }

    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 0.9rem 2.2rem;
      border-radius: var(--btn-radius);
      font-weight: 600;
    }

    .btn-outline-gold:hover {
      background: rgba(212,175,55,0.15);
      border-color: #f0d870;
    }

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

    .section-title {
      font-size: 2.2rem;
      color: var(--text-white);
      text-align: center;
      margin-bottom: 2.8rem;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1rem;
    }
    .section-title::before,
    .section-title::after {
      content: '';
      height: 1px;
      width: 50px;
      background: var(--champagne-gold);
      opacity: 0.5;
    }

    /* 非对称卡片 */
    .features-grid {
      display: flex;
      gap: 2rem;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
    }
    .feature-card {
      background: var(--dark-brown);
      border-radius: var(--card-radius);
      padding: 2rem;
      flex: 1 1 250px;
      border: 1px solid var(--border-gold-dim);
      transition: all 0.3s;
      position: relative;
    }
    .feature-card.main {
      border-color: var(--champagne-gold);
      transform: scale(1.03);
      box-shadow: 0 12px 28px var(--shadow-gold);
    }
    .feature-card:hover {
      border-color: var(--champagne-gold);
      box-shadow: 0 8px 32px var(--shadow-gold);
      background: #352421;
    }
    .feature-number {
      font-family: var(--font-numbers);
      font-size: 2.4rem;
      color: var(--champagne-gold);
      opacity: 0.9;
    }
    .feature-title {
      font-size: 1.4rem;
      margin: 0.8rem 0 0.6rem;
      color: white;
    }

    /* 游戏卡片 */
    .games-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 2rem;
    }
    .game-card {
      background: var(--chocolate);
      border-radius: 0;
      overflow: hidden;
      transition: 0.35s;
      border: 1px solid transparent;
    }
    .game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 18px 35px rgba(212,175,55,0.2);
      border-color: var(--champagne-gold);
    }
    .game-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .game-info {
      padding: 1.4rem;
      background: #1e1412;
    }
    .game-name {
      color: var(--champagne-gold);
      font-size: 1.3rem;
      font-weight: 600;
    }

    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      background: var(--ivory-light);
      color: #2b1b17;
      border-radius: 12px;
      padding: 2.5rem;
      margin-top: 1rem;
    }
    .step-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      flex: 1;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: transparent;
      border: 2px solid var(--deep-wine);
      color: var(--deep-wine);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.3rem;
      margin-bottom: 0.8rem;
    }

    /* 数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-numbers);
      font-size: 3rem;
      color: var(--champagne-gold);
      font-weight: 700;
    }

    /* FAQ */
    .faq-item {
      background: var(--dark-brown);
      border: 1px solid var(--border-gold-dim);
      border-radius: 6px;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .faq-question {
      padding: 1.2rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      color: white;
    }
    .faq-answer {
      padding: 0 1.2rem 1.2rem;
      color: var(--text-muted);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    .cta-block {
      background: var(--deep-wine);
      text-align: center;
      padding: 4rem 1.5rem;
      background-image: radial-gradient(circle at 30% 30%, rgba(212,175,55,0.15) 0%, transparent 60%);
    }
    .btn-cta-large {
      background: var(--champagne-gold);
      color: var(--deep-wine);
      padding: 1rem 3rem;
      font-weight: 700;
      font-size: 1.2rem;
      border: none;
      border-radius: 4px;
    }

    .footer {
      background: #100b0a;
      padding: 3rem 1.5rem;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
    }

    @media (max-width: 992px) {
      .nav-links, .nav-right .search-box, .nav-right .btn-login {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
    }

    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .steps { flex-direction: column; gap: 2rem; }
    }