/* roulang page: index */
/* ----- 设计变量 ----- */
    :root {
      --primary: #7B2FF7;
      --secondary: #00F0FF;
      --bg-deep: #0A0A0F;
      --bg-card: #141420;
      --bg-light: #0F0F18;
      --text-white: #FFFFFF;
      --text-body: #B0B8D0;
      --text-muted: #6B7280;
      --border-subtle: rgba(123, 47, 247, 0.15);
      --border-glow: rgba(0, 240, 255, 0.5);
      --radius-lg: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.6);
      --shadow-hover: 0 8px 30px rgba(123,47,247,0.3);
      --transition: 0.3s ease-out;
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "Inter", "SF Mono", "Roboto Mono", monospace;
    }

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

    body {
      font-family: var(--font-main);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: transparent;
    }

    /* 容器微调 */
    .grid-container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* ----- 导航 (固定顶部) ----- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      color: var(--secondary);
      font-size: 2rem;
    }
    .logo span {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-links a {
      color: var(--text-body);
      font-weight: 500;
      font-size: 0.95rem;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--secondary);
      border-bottom-color: var(--secondary);
    }

    .cta-btn {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      transition: all var(--transition);
      display: inline-block;
      box-shadow: 0 4px 12px rgba(123,47,247,0.4);
    }
    .cta-btn:hover {
      transform: scale(1.03);
      box-shadow: 0 6px 20px rgba(0,240,255,0.5);
      color: white;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      display: block;
      transition: var(--transition);
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--bg-deep);
      z-index: 99;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      transform: translateX(-100%);
      transition: transform 0.4s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      font-size: 1.8rem;
      color: var(--text-white);
      font-weight: 600;
    }
    .mobile-menu .cta-btn {
      margin-top: 1rem;
    }
    .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 2rem;
      color: white;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .header-inner .cta-btn { display: none; }
    }

    /* ----- Hero 首屏 ----- */
    #hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
      margin-top: 0;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(10,10,15,0.92) 0%, rgba(10,10,15,0.35) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 500px;
      color: white;
    }
    .hero-text h1 {
      font-size: 56px;
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -0.5px;
      margin-bottom: 1.2rem;
      color: var(--text-white);
    }
    .hero-text .sub {
      font-size: 1.3rem;
      color: var(--text-body);
      margin-bottom: 2rem;
      font-weight: 400;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      transition: all var(--transition);
    }
    .btn-primary:hover {
      transform: scale(1.03);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--secondary);
      color: var(--secondary);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      color: var(--secondary);
    }
    .hero-image {
      flex: 0 0 380px;
      position: relative;
      z-index: 2;
    }
    .hero-image img {
      border-radius: 20px;
      box-shadow: 0 0 40px rgba(123,47,247,0.4);
      animation: pulse-glow 2.5s infinite;
    }
    @keyframes pulse-glow {
      0% { box-shadow: 0 0 20px rgba(123,47,247,0.3); }
      50% { box-shadow: 0 0 45px rgba(0,240,255,0.5); }
      100% { box-shadow: 0 0 20px rgba(123,47,247,0.3); }
    }
    @media (max-width: 1024px) {
      .hero-text h1 { font-size: 42px; }
      .hero-image { flex: 0 0 300px; }
    }
    @media (max-width: 768px) {
      #hero { height: auto; padding: 120px 0 60px; }
      .hero-overlay { background: rgba(10,10,15,0.88); }
      .hero-content { flex-direction: column; text-align: center; }
      .hero-text { margin-bottom: 2rem; }
      .hero-image { width: 250px; margin: 0 auto; }
    }

    /* 实时数据条 */
    .data-strip {
      background: #0F0F18;
      padding: 24px 0;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      overflow-x: auto;
    }
    .data-items {
      display: flex;
      justify-content: space-around;
      min-width: 600px;
    }
    .data-item {
      text-align: center;
      color: white;
    }
    .data-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      text-transform: uppercase;
    }
    .data-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--secondary);
      text-shadow: 0 0 8px rgba(0,240,255,0.5);
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 640px) {
      section { padding: 60px 0; }
    }
    .section-title {
      font-size: 40px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 1rem;
      text-align: center;
    }
    .section-sub {
      color: var(--text-body);
      text-align: center;
      margin-bottom: 3rem;
    }

    /* 核心优势 不对称栅格 */
    .adv-grid {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .adv-left {
      flex: 0 0 40%;
    }
    .adv-left img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }
    .adv-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 20px;
      display: flex;
      gap: 16px;
      transition: all var(--transition);
    }
    .adv-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .adv-icon {
      font-size: 1.8rem;
      color: var(--secondary);
    }
    @media (max-width: 768px) {
      .adv-grid { flex-direction: column; }
      .adv-left { flex: auto; }
    }

    /* 明星战队 */
    .roster-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .player-card {
      height: 360px;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-lg);
      position: relative;
      overflow: hidden;
      transition: all var(--transition);
    }
    .player-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .player-card .overlay {
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 20px;
      background: linear-gradient(transparent 30%, rgba(10,10,15,0.95) 100%);
      transition: all var(--transition);
    }
    .player-card:hover .overlay {
      padding-bottom: 30px;
    }
    .player-id {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
    }
    .player-role {
      color: var(--secondary);
      font-size: 0.9rem;
    }
    @media (max-width: 768px) {
      .roster-grid { grid-template-columns: repeat(2, 1fr); }
    }

    /* 赛事方案 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .solution-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 40px;
      position: relative;
      transition: all var(--transition);
    }
    .solution-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-hover);
    }
    .solution-num {
      font-size: 72px;
      font-weight: 900;
      color: rgba(123,47,247,0.15);
      position: absolute;
      top: 20px;
      right: 30px;
    }
    @media (max-width: 640px) {
      .solutions-grid { grid-template-columns: 1fr; }
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.05);
      padding: 20px 0;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      color: white;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding-left: 36px;
      color: var(--text-body);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: #0F0F18 url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.8"/></filter><rect width="100" height="100" filter="url(/%23noise)" opacity="0.05"/></svg>');
      text-align: center;
      padding: 80px 20px;
    }

    /* 页脚 */
    .site-footer {
      background: #08080D;
      border-top: 1px solid rgba(123,47,247,0.2);
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }