/* roulang page: index */
/* 基础重置与设计变量 */
    :root {
      --bg-deep: #0D0B1E;
      --bg-footer: #0A0818;
      --card-bg: rgba(20,18,40,0.8);
      --gold: #F0B90B;
      --gold-bright: #F5C842;
      --gold-dim: rgba(240,184,11,0.15);
      --orange: #FF6B35;
      --orange-bright: #FF7F50;
      --text-primary: #F2F2F2;
      --text-secondary: #A0A0B0;
      --text-muted: #6A6A7A;
      --border-subtle: rgba(240,184,11,0.15);
      --border-glow: rgba(240,184,11,0.4);
      --shadow-gold: 0 4px 24px rgba(240,184,11,0.08);
      --shadow-hover: 0 8px 40px rgba(240,184,11,0.2);
      --radius-sm: 2px;
      --radius-card: 4px;
      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --font-chinese: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition-default: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --container-max: 1280px;
      --header-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-chinese);
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-default);
    }
    img {
      max-width: 100%;
      display: block;
      height: auto;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-chinese);
      border: none;
      outline: none;
      background: transparent;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.3;
    }
    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(13,11,30,0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(13,11,30,0.88), rgba(13,11,30,0.88)), linear-gradient(90deg, var(--gold-dim), var(--orange) 80%, var(--gold-dim));
      background-origin: border-box;
      background-clip: padding-box, border-box;
      height: var(--header-height);
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--gold);
      letter-spacing: 0.02em;
      display: flex;
      align-items: center;
      gap: 6px;
      text-shadow: 0 0 12px rgba(240,184,11,0.4);
    }
    .logo::before {
      content: "";
      display: inline-block;
      width: 20px;
      height: 20px;
      background: radial-gradient(circle, var(--gold-bright) 10%, transparent 70%);
      clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
      background-color: var(--gold);
      margin-right: 4px;
    }
    .nav-menu {
      display: flex;
      gap: 2rem;
      list-style: none;
    }
    .nav-menu a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-menu a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width 0.3s ease;
    }
    .nav-menu a:hover {
      color: var(--gold);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: transparent;
      border: none;
      cursor: pointer;
      z-index: 1100;
    }
    .hamburger span {
      width: 28px;
      height: 2px;
      background: var(--text-primary);
      transition: all 0.3s;
      display: block;
    }
    .mobile-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--bg-deep);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      transform: translateY(-100%);
      transition: transform 0.4s ease;
      z-index: 1050;
      list-style: none;
    }
    .mobile-nav.active {
      transform: translateY(0);
    }
    .mobile-nav a {
      font-size: 2rem;
      font-weight: 600;
      color: var(--text-primary);
    }
    /* 区块间距 */
    section {
      padding: 90px 0;
      scroll-margin-top: var(--header-height);
    }
    @media (max-width: 1024px) {
      section {
        padding: 70px 0;
      }
    }
    @media (max-width: 640px) {
      section {
        padding: 56px 0;
      }
      .container {
        padding: 0 20px;
      }
    }
    /* 按钮系统 */
    .btn-primary {
      background: var(--gold);
      color: var(--bg-deep);
      font-weight: 700;
      padding: 13px 32px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.04em;
      transition: all var(--transition-default);
      border: 1.5px solid transparent;
      font-size: 1rem;
      box-shadow: 0 6px 18px rgba(240,184,11,0.3);
    }
    .btn-primary:hover {
      background: var(--gold-bright);
      box-shadow: 0 0 24px rgba(240,184,11,0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--gold);
      color: var(--gold);
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--radius-sm);
      transition: all var(--transition-default);
      letter-spacing: 0.04em;
    }
    .btn-outline:hover {
      background: rgba(240,184,11,0.12);
      border-color: var(--gold-bright);
      color: var(--gold-bright);
    }
    /* Hero 首屏 */
    .hero {
      display: flex;
      align-items: center;
      min-height: 90vh;
      padding-top: calc(var(--header-height) + 30px);
      position: relative;
      overflow: hidden;
      background: radial-gradient(circle at 30% 40%, rgba(240,184,11,0.08) 0%, transparent 50%);
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(255,107,53,0.12) 0%, transparent 70%);
      top: 10%;
      right: 5%;
      animation: floatParticle 12s infinite alternate;
    }
    @keyframes floatParticle {
      0% { transform: translate(0,0); opacity: 0.6; }
      100% { transform: translate(30px, -30px); opacity: 1; }
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      width: 100%;
    }
    .hero-content h1 {
      font-size: clamp(2.2rem, 5vw, 3.5rem);
      background: linear-gradient(to right, #F0B90B, #FFB347);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 1.2rem;
      letter-spacing: -0.01em;
    }
    .hero-content h2 {
      font-size: 1.5rem;
      font-weight: 500;
      color: var(--text-secondary);
      margin-bottom: 1.2rem;
    }
    .hero-desc {
      color: var(--text-secondary);
      max-width: 500px;
      margin-bottom: 2rem;
      font-size: 1.05rem;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 420px;
      border-radius: var(--radius-card);
      clip-path: polygon(0% 0%, 100% 0%, 100% 90%, 85% 100%, 0% 100%);
      box-shadow: 0 0 30px rgba(240,184,11,0.25);
      border: 1px solid var(--border-subtle);
    }
    /* 核心优势 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 24px;
    }
    .adv-card-large {
      grid-column: span 6;
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
      padding: 32px;
      border-radius: var(--radius-card);
      display: flex;
      gap: 24px;
      align-items: center;
      clip-path: polygon(0% 0%, 98% 0%, 100% 10%, 100% 100%, 2% 100%, 0% 90%);
      transition: all var(--transition-default);
      box-shadow: var(--shadow-gold);
    }
    .adv-card-large:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .adv-card-small {
      grid-column: span 4;
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      text-align: center;
      clip-path: polygon(5% 0%, 95% 0%, 100% 8%, 100% 92%, 95% 100%, 5% 100%, 0% 92%, 0% 8%);
      transition: all var(--transition-default);
    }
    .adv-card-small:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
    }
    .adv-icon {
      font-size: 2.8rem;
      color: var(--gold);
    }
    /* 赛事服务卡片 */
    .tournament-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .tournament-card {
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: all var(--transition-default);
      box-shadow: var(--shadow-gold);
    }
    .tournament-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--border-glow);
    }
    .tournament-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .tournament-info {
      padding: 20px;
    }
    .badge {
      display: inline-block;
      padding: 4px 12px;
      background: var(--orange);
      color: white;
      font-size: 0.8rem;
      border-radius: 2px;
      font-weight: 600;
    }
    /* 时间轴 */
    .timeline {
      display: flex;
      justify-content: space-between;
      position: relative;
      margin-top: 30px;
    }
    .timeline::before {
      content: "";
      position: absolute;
      top: 28px;
      left: 5%;
      width: 90%;
      height: 3px;
      background: linear-gradient(to right, var(--gold), var(--orange), var(--text-muted));
      z-index: 0;
    }
    .timeline-node {
      display: flex;
      flex-direction: column;
      align-items: center;
      z-index: 2;
      width: 80px;
    }
    .node-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--gold);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      margin-bottom: 12px;
    }
    /* 数据仪表盘 */
    .data-panel {
      background: rgba(10,8,24,0.7);
      backdrop-filter: blur(4px);
      background-image: repeating-linear-gradient(0deg, rgba(240,184,11,0.05) 0px, rgba(240,184,11,0.05) 1px, transparent 1px, transparent 40px);
      border: 1px solid var(--border-subtle);
    }
    .counter {
      font-size: 3rem;
      font-weight: 800;
      color: var(--gold);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(160,160,176,0.2);
      padding: 20px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    /* 页脚 */
    .site-footer {
      background: var(--bg-footer);
      padding: 60px 0 30px;
      color: var(--text-secondary);
    }