/* roulang page: index */
:root {
      --primary: #0A7BFF;
      --primary-glow: rgba(10, 123, 255, 0.5);
      --accent: #FF6B2B;
      --accent-glow: rgba(255, 107, 43, 0.45);
      --deep-bg: #0B0F19;
      --card-bg: rgba(19, 26, 43, 0.6);
      --card-border: rgba(255, 255, 255, 0.08);
      --success: #00C48C;
      --white: #FFFFFF;
      --gray-light: #B0B8C8;
      --gray-mid: #6B7280;
      --radius-card: 16px;
      --radius-btn: 50px;
      --radius-tag: 20px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 12px 40px rgba(10, 123, 255, 0.15);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
      --nav-height: 72px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background: linear-gradient(135deg, #0B0F19 0%, #131A2B 100%);
      font-family: var(--font-sans);
      color: var(--gray-light);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      color: var(--white);
      font-weight: 700;
    }

    h1 {
      font-size: 3.2rem;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 2.2rem;
      font-weight: 600;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }

    .text-mono {
      font-family: var(--font-mono);
    }

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

    a:hover {
      color: var(--accent);
    }

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

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 导航 */
    .navbar {
      height: var(--nav-height);
      background: transparent;
      transition: background 0.3s, backdrop-filter 0.3s;
      z-index: 1000;
      padding: 0 1.5rem;
    }

    .navbar.scrolled {
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--white) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }

    .navbar-brand .logo-icon {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary-glow);
    }

    .nav-link {
      color: var(--gray-light) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      font-size: 0.95rem;
      transition: 0.2s;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--white) !important;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary-glow);
      transition: width 0.25s;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      width: 70%;
    }

    .btn-glow {
      background: var(--primary);
      color: white;
      border: none;
      border-radius: var(--radius-btn);
      padding: 0.5rem 1.5rem;
      font-weight: 600;
      box-shadow: 0 0 18px var(--primary-glow);
      transition: 0.3s;
      white-space: nowrap;
    }

    .btn-glow:hover {
      background: #1a8bff;
      box-shadow: 0 0 28px var(--primary-glow);
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline-light-glow {
      border: 1px solid rgba(255, 255, 255, 0.35);
      background: transparent;
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.5rem 1.5rem;
      font-weight: 500;
      transition: 0.3s;
    }

    .btn-outline-light-glow:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .badge-tag {
      background: rgba(255, 107, 43, 0.15);
      color: var(--accent);
      padding: 0.2rem 0.8rem;
      border-radius: var(--radius-tag);
      font-size: 0.75rem;
      font-weight: 600;
      margin-left: 0.5rem;
    }

    /* hero */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      padding-top: var(--nav-height);
    }

    .hero-bg-particles {
      position: absolute;
      inset: 0;
      overflow: hidden;
      pointer-events: none;
    }

    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: var(--primary);
      border-radius: 50%;
      opacity: 0.3;
      animation: float 8s infinite ease-in-out;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0) scale(1); opacity: 0.2; }
      50% { transform: translateY(-25px) scale(1.5); opacity: 0.6; }
    }

    .hero-visual-card {
      background: rgba(19, 26, 43, 0.7);
      backdrop-filter: blur(16px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 1rem;
      position: relative;
      box-shadow: var(--shadow-card);
    }

    .live-badge {
      background: var(--accent);
      color: white;
      font-size: 0.7rem;
      padding: 0.2rem 0.7rem;
      border-radius: 12px;
      font-weight: 600;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: 0.3s;
    }

    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .icon-glow {
      color: var(--primary);
      filter: drop-shadow(0 0 8px var(--primary-glow));
      font-size: 2rem;
    }

    .section-title {
      position: relative;
      display: inline-block;
      margin-bottom: 2.5rem;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -12px;
      left: 0;
      width: 60%;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), transparent);
    }

    /* 瀑布流卡片 */
    .masonry-grid {
      column-count: 2;
      column-gap: 1.8rem;
    }

    .masonry-item {
      break-inside: avoid;
      margin-bottom: 1.8rem;
    }

    .league-card {
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .league-card img {
      transition: transform 0.4s;
    }

    .league-card:hover img {
      transform: scale(1.03);
    }

    .league-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.8));
      padding: 1.5rem 1rem 1rem;
      color: white;
    }

    .status-tag {
      position: absolute;
      top: 1rem;
      left: 1rem;
      background: var(--accent);
      color: white;
      padding: 0.2rem 1rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .progress-custom {
      height: 10px;
      background: rgba(255,255,255,0.08);
      border-radius: 10px;
      overflow: hidden;
    }

    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), #4da3ff);
      width: 0%;
      border-radius: 10px;
    }

    .accordion-button {
      background: transparent !important;
      color: var(--white) !important;
      font-weight: 600;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      box-shadow: none !important;
    }

    .accordion-button:not(.collapsed) {
      border-left: 3px solid var(--primary);
      background: rgba(10,123,255,0.05) !important;
    }

    .accordion-body {
      color: var(--gray-light);
    }

    .cta-glow-bg {
      background: radial-gradient(circle at 30% 30%, rgba(10,123,255,0.15), transparent 70%);
    }

    .countdown-block {
      background: rgba(0,0,0,0.3);
      border-radius: 12px;
      padding: 0.5rem 1rem;
      font-family: var(--font-mono);
      font-size: 1.5rem;
      color: var(--accent);
      text-shadow: 0 0 8px var(--accent-glow);
    }

    footer {
      border-top: 1px solid rgba(255,255,255,0.05);
    }

    @media (max-width: 992px) {
      h1 { font-size: 2.5rem; }
      .masonry-grid { column-count: 1; }
    }

    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      .navbar-collapse { background: rgba(11,15,25,0.95); backdrop-filter: blur(20px); padding: 1rem; border-radius: 12px; }
    }