/* roulang page: index */
:root {
      --deep-charcoal: #1A1F1E;
      --obsidian-green: #0F1211;
      --card-bg: #1E2422;
      --data-bg: #181C1A;
      --footer-bg: #0A0C0B;
      --orange-gold: #F5A623;
      --electric-cyan: #00E5FF;
      --success-green: #00C853;
      --alert-red: #FF3D00;
      --gray-mid: #B0B8B5;
      --gray-dim: #6A7370;
      --white: #FFFFFF;
      --border-subtle: rgba(245,166,35,0.2);
      --shadow-card: 0 12px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(245,166,35,0.15);
      --shadow-btn: 0 8px 24px rgba(245,166,35,0.4);
      --shadow-nav: 0 4px 20px rgba(0,0,0,0.6);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-pill: 50px;
      --transition: all 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
      --font-mono: "Inter", "SF Pro Display", system-ui, sans-serif;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--obsidian-green);
      color: var(--gray-mid);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-sans);
      font-weight: 800;
      color: var(--white);
    }
    
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      outline: none;
      transition: var(--transition);
    }
    
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(26, 31, 30, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-subtle);
      z-index: 1000;
      box-shadow: var(--shadow-nav);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 900;
      font-size: 1.5rem;
      color: var(--white);
      letter-spacing: 0.02em;
    }
    
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--orange-gold), #FF8C00);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0F1211;
      font-size: 20px;
      font-weight: 900;
    }
    
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    
    .nav-menu a {
      color: var(--gray-mid);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
    }
    
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--orange-gold);
      transition: width 0.3s ease;
    }
    
    .nav-menu a:hover {
      color: var(--electric-cyan);
    }
    
    .nav-menu a:hover::after {
      width: 100%;
    }
    
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 4px;
    }
    
    .hamburger span {
      width: 28px;
      height: 3px;
      background: var(--white);
      border-radius: 4px;
      transition: var(--transition);
    }
    
    /* 首屏 Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at center, rgba(245,166,35,0.18) 0%, rgba(15,18,17,0.92) 70%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      position: relative;
      padding-top: 80px;
    }
    
    .hero-content {
      max-width: 700px;
      position: relative;
      z-index: 2;
    }
    
    .hero h1 {
      font-size: clamp(2.2rem, 5vw, 3.5rem);
      font-weight: 900;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: var(--white);
    }
    
    .hero .highlight {
      color: var(--orange-gold);
    }
    
    .hero-sub {
      font-size: 1.1rem;
      color: var(--gray-mid);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 2.5rem;
    }
    
    .hero-sub span {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .hero-sub .dot {
      width: 6px;
      height: 6px;
      background: var(--electric-cyan);
      border-radius: 50%;
      display: inline-block;
    }
    
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    
    .btn-primary {
      background: var(--orange-gold);
      color: #0F1211;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      box-shadow: 0 4px 14px rgba(245,166,35,0.3);
      letter-spacing: 0.02em;
    }
    
    .btn-primary:hover {
      background: #FFB74D;
      transform: scale(1.05);
      box-shadow: var(--shadow-btn);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--orange-gold);
      color: var(--orange-gold);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
    }
    
    .btn-outline:hover {
      background: rgba(245,166,35,0.15);
      color: var(--white);
      border-color: var(--white);
    }
    
    .hero-decor {
      position: absolute;
      right: 5%;
      bottom: 10%;
      width: 300px;
      height: 300px;
      border: 2px solid rgba(0,229,255,0.2);
      border-radius: 40px;
      transform: rotate(15deg);
      opacity: 0.6;
      pointer-events: none;
    }
    
    /* 数据看板 */
    .data-strip {
      background: var(--data-bg);
      padding: 28px 0;
      border-top: 1px solid rgba(255,255,255,0.05);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      overflow-x: auto;
      white-space: nowrap;
      scroll-snap-type: x mandatory;
    }
    
    .data-track {
      display: flex;
      justify-content: space-between;
      gap: 32px;
      min-width: 700px;
      padding: 0 24px;
    }
    
    .data-item {
      scroll-snap-align: start;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }
    
    .data-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--electric-cyan);
      letter-spacing: -0.02em;
    }
    
    .data-label {
      font-size: 0.85rem;
      color: var(--gray-dim);
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: clamp(2rem, 4vw, 2.5rem);
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--white);
    }
    
    .section-sub {
      color: var(--gray-mid);
      margin-bottom: 48px;
      max-width: 600px;
    }
    
    /* 服务卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: transform 0.25s, box-shadow 0.25s;
      border: 1px solid transparent;
    }
    
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-card);
      border-color: rgba(245,166,35,0.25);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background: rgba(245,166,35,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 28px;
      color: var(--electric-cyan);
      transition: var(--transition);
    }
    
    .service-card:hover .icon-circle {
      background: var(--orange-gold);
      color: #0F1211;
    }
    
    .service-card h3 {
      font-size: 1.4rem;
      color: var(--orange-gold);
      margin-bottom: 10px;
    }
    
    /* 对比表格 */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 80px 1fr;
      gap: 24px;
      align-items: center;
    }
    
    .compare-col {
      background: var(--card-bg);
      padding: 32px;
      border-radius: var(--radius-card);
    }
    
    .compare-col.left {
      border-left: 4px solid var(--gray-dim);
    }
    
    .compare-col.right {
      border: 2px solid var(--orange-gold);
      background: #1e2722;
      box-shadow: 0 0 20px rgba(245,166,35,0.1);
    }
    
    .vs-badge {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--orange-gold);
      text-align: center;
    }
    
    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-weight: 500;
    }
    
    /* 赛事卡片 */
    .sports-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    
    .sport-card {
      background: #1a1f1e;
      border-radius: var(--radius-card);
      overflow: hidden;
      position: relative;
      transition: var(--transition);
    }
    
    .sport-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    
    .sport-card:hover img {
      transform: scale(1.05);
    }
    
    .sport-info {
      padding: 16px;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      position: absolute;
      bottom: 0;
      width: 100%;
    }
    
    .badge {
      background: var(--orange-gold);
      color: #0F1211;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 50px;
      font-size: 0.75rem;
    }
    
    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      border-radius: 12px;
      margin-bottom: 12px;
    }
    
    .faq-question {
      width: 100%;
      background: transparent;
      color: var(--white);
      padding: 20px 24px;
      font-size: 1.1rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border: none;
      cursor: pointer;
      text-align: left;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #151a18;
      border-left: 3px solid var(--orange-gold);
      margin: 0 20px 20px;
      padding: 0 16px;
      color: var(--gray-mid);
    }
    
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px;
    }
    
    /* CTA */
    .cta-band {
      background: linear-gradient(135deg, #F5A623 0%, #1A1F1E 80%);
      padding: 80px 24px;
      text-align: center;
      position: relative;
    }
    
    .cta-band h2 {
      font-size: 2.5rem;
      color: white;
      margin-bottom: 16px;
    }
    
    .trust-icons {
      display: flex;
      justify-content: center;
      gap: 40px;
      margin-top: 32px;
      color: rgba(255,255,255,0.7);
      flex-wrap: wrap;
    }
    
    /* 页脚 */
    .footer {
      background: var(--footer-bg);
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .sports-grid { grid-template-columns: repeat(2,1fr); }
      .compare-grid { grid-template-columns: 1fr; }
      .vs-badge { display: none; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .grid-3, .sports-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero { text-align: center; }
      .btn-group { justify-content: center; }
    }