/* roulang page: index */
:root {
      --bs-primary: #00F0B5;
      --bs-secondary: #FF3C5A;
      --bs-dark: #0A0E17;
      --bs-darker: #06080c;
      --bs-gray-800: #1C1F26;
      --bs-gray-700: #2A2D35;
      --bs-light: #F4F4F7;
      --bs-body-bg: #0A0E17;
      --bs-body-color: #E0E0E5;
      --bs-border-radius: 12px;
      --bs-border-color: #2A2D35;
      --bs-link-color: #00F0B5;
      --bs-link-hover-color: #FF3C5A;
      --font-sans: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --glow-green: 0 0 20px rgba(0,240,181,0.25);
      --shadow-card: 0 8px 30px rgba(0,0,0,0.3);
      --transition-smooth: all 0.28s cubic-bezier(0.2, 0.9, 0.4, 1);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bs-body-bg);
      color: var(--bs-body-color);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .nav-brand, .btn, .fw-bold {
      font-weight: 700;
      letter-spacing: -0.02em;
    }

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

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

    /* 自定义容器微调 */
    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
      width: 100%;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 0 0;
      transition: background 0.3s, box-shadow 0.3s;
      position: fixed;
      width: 100%;
      z-index: 1030;
    }
    .navbar.scrolled {
      background: rgba(10, 14, 23, 0.96);
      box-shadow: 0 10px 30px -10px rgba(0,0,0,0.7);
    }
    .nav-brand {
      font-size: 1.8rem;
      font-weight: 800;
      color: #00F0B5 !important;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
    }
    .nav-link {
      color: #ccccdd !important;
      font-weight: 500;
      margin: 0 0.5rem;
      padding: 0.75rem 1rem !important;
      position: relative;
      font-size: 0.95rem;
      transition: 0.2s;
    }
    .nav-link:hover {
      color: #ffffff !important;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 1rem;
      right: 1rem;
      height: 2px;
      background: #FF3C5A;
      transform: scaleX(0);
      transition: transform 0.25s ease;
    }
    .nav-link:hover::after {
      transform: scaleX(1);
    }
    .navbar-toggler {
      border: 1px solid #00F0B5;
      padding: 0.4rem 0.7rem;
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='%2300F0B5' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
    }

    /* 板块间距 */
    section {
      padding: 100px 0;
      scroll-margin-top: 70px;
    }

    .bg-dark-deep {
      background-color: #0A0E17;
    }
    .bg-gray-light {
      background-color: #F4F4F7;
      color: #0A0E17;
    }
    .bg-card {
      background-color: #1C1F26;
      border: 1px solid #2A2D35;
      border-radius: 12px;
    }

    /* 按钮 */
    .btn-primary-custom {
      background: #00F0B5;
      color: #0A0E17;
      font-weight: 700;
      border-radius: 8px;
      padding: 0.8rem 2.2rem;
      border: none;
      transition: 0.25s;
      box-shadow: 0 4px 16px rgba(0,240,181,0.2);
    }
    .btn-primary-custom:hover {
      background: #00D9A0;
      box-shadow: 0 0 28px rgba(0,240,181,0.45);
      transform: translateY(-2px);
      color: #0A0E17;
    }
    .btn-outline-neon {
      background: transparent;
      border: 1px solid #00F0B5;
      color: #00F0B5;
      font-weight: 600;
      border-radius: 8px;
      padding: 0.7rem 2rem;
    }
    .btn-outline-neon:hover {
      background: rgba(0,240,181,0.08);
      border-color: #FF3C5A;
      color: #FF3C5A;
    }
    .btn-lg-cta {
      padding: 1rem 3rem;
      font-size: 1.25rem;
    }

    /* Hero */
    #hero {
      min-height: 100vh;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: center;
    }
    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(10,14,23,0.3) 0%, #0A0E17 95%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 4rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.2;
    }
    .highlight {
      color: #00F0B5;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: #ccc;
      max-width: 600px;
    }

    /* 卡片通用 */
    .card-uwin {
      background: #1C1F26;
      border: 1px solid #2A2D35;
      border-radius: 12px;
      transition: 0.3s;
      height: 100%;
    }
    .card-uwin:hover {
      box-shadow: 0 0 28px rgba(0,240,181,0.18);
      border-color: #00F0B5;
      transform: translateY(-5px);
    }

    /* 统计数字 */
    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      color: #FF3C5A;
    }

    /* 手风琴 */
    .accordion-button {
      background: #1C1F26;
      color: #f0f0f0;
      font-weight: 600;
      border: 1px solid #2A2D35;
      border-radius: 12px !important;
      padding: 1.2rem 1.8rem;
    }
    .accordion-button:not(.collapsed) {
      background: #1C1F26;
      color: #00F0B5;
      box-shadow: none;
    }
    .accordion-button::after {
      filter: invert(85%) sepia(1) saturate(3000%) hue-rotate(80deg);
    }
    .accordion-item {
      margin-bottom: 16px;
      background: transparent;
      border: none;
    }

    /* 页脚 */
    footer a {
      color: #aaa;
      transition: 0.2s;
    }
    footer a:hover {
      color: #00F0B5;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.8rem;
      }
      section {
        padding: 70px 0;
      }
    }