/* roulang page: index */
:root {
      --deep-black: #0A0B14;
      --electric-purple: #6C0BFF;
      --electric-cyan: #00F0FF;
      --trophy-gold: #FFD700;
      --deep-gold: #FF8C00;
      --light-lavender: #F8F6FF;
      --dark-card: #141522;
      --text-soft: #B8B8C8;
      --text-dark: #1A0F2E;
      --border-subtle: rgba(108, 11, 255, 0.15);
      --gradient-primary: linear-gradient(135deg, #6C0BFF 0%, #00F0FF 100%);
      --gradient-gold: linear-gradient(135deg, #FFD700 0%, #FF8C00 100%);
      --radius-xl: 24px;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 32px rgba(108, 11, 255, 0.08);
      --shadow-hover: 0 16px 48px rgba(108, 11, 255, 0.18);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-mono: 'Inter', 'SF Pro Display', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black);
      color: #ffffff;
      margin: 0;
      line-height: 1.7;
      font-weight: 400;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .nav-link, .btn, .data-number {
      font-family: var(--font-sans);
    }

    .data-number, .metric-value {
      font-family: var(--font-mono);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }

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

    /* 导航栏 */
    .navbar {
      background: rgba(10, 11, 20, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      padding: 0 60px;
      height: 72px;
      border-bottom: 1px solid rgba(108, 11, 255, 0.2);
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1030;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      display: inline-block;
      width: 32px;
      height: 32px;
      background: var(--electric-purple);
      clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
      transform: rotate(45deg);
    }

    .nav-links {
      display: flex;
      gap: 40px;
      align-items: center;
    }

    .nav-link {
      color: #CCCCCC;
      font-weight: 500;
      font-size: 1rem;
      padding: 8px 0;
      position: relative;
      transition: color 0.2s;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background: var(--gradient-primary);
      border-radius: 2px;
      transition: width 0.25s ease;
    }

    .nav-link:hover, .nav-link.active {
      color: #ffffff;
    }

    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    .btn-nav {
      background: var(--gradient-primary);
      border: none;
      color: white;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-lg);
      font-size: 0.95rem;
      transition: all 0.25s;
      margin-left: 20px;
    }

    .btn-nav:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(108, 11, 255, 0.5);
      filter: brightness(1.1);
      color: white;
    }

    .navbar-toggler {
      border: none;
      color: white;
      font-size: 1.5rem;
    }

    .mobile-menu {
      background: rgba(10, 11, 20, 0.98);
      backdrop-filter: blur(30px);
    }

    @media (max-width: 991px) {
      .navbar {
        padding: 0 24px;
      }
      .nav-links {
        gap: 20px;
      }
    }

    @media (max-width: 767px) {
      .navbar .nav-links {
        display: none;
      }
      .navbar .btn-nav {
        display: none;
      }
      .mobile-nav-open .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--deep-black);
        padding: 40px;
        gap: 32px;
        align-items: center;
        justify-content: center;
      }
    }

    /* 通用板块 */
    section {
      padding: 120px 0;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--gradient-primary);
      border-radius: 4px;
    }

    .bg-dark-lighter {
      background-color: #0d0f1c;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* Hero */
    #hero {
      padding-top: 160px;
      padding-bottom: 120px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(10, 11, 20, 0.92);
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
    }

    .hero-title {
      font-size: 4.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

    .gradient-text {
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .underline-gold {
      background: linear-gradient(to right, #FFD700, #FF8C00);
      height: 4px;
      width: 120px;
      border-radius: 2px;
      margin-top: 8px;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: #C0C0D0;
      max-width: 600px;
      margin: 24px 0 32px;
    }

    .btn-primary-custom {
      background: var(--gradient-primary);
      border: none;
      color: white;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-lg);
      transition: 0.25s;
      display: inline-block;
    }

    .btn-primary-custom:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 32px rgba(108, 11, 255, 0.5);
      filter: brightness(1.1);
      color: white;
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid transparent;
      background-image: linear-gradient(rgba(10,11,20,0.8), rgba(10,11,20,0.8)), var(--gradient-primary);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      color: var(--electric-purple);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-lg);
      transition: 0.25s;
    }

    .btn-outline-custom:hover {
      background: var(--gradient-primary);
      color: white;
      transform: translateY(-2px);
    }

    .data-badge-grid {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
      margin-top: 48px;
    }

    .data-badge {
      background: #141522;
      border-radius: var(--radius-md);
      padding: 20px 28px;
      text-align: center;
      border: 1px solid rgba(108, 11, 255, 0.3);
      min-width: 140px;
      animation: pulseGlow 2.5s infinite;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 8px rgba(0,240,255,0.2); }
      50% { box-shadow: 0 0 20px rgba(0,240,255,0.5); }
      100% { box-shadow: 0 0 8px rgba(0,240,255,0.2); }
    }

    .badge-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--electric-cyan);
    }

    /* 卡片 */
    .card-custom {
      background: #ffffff;
      border-radius: var(--radius-xl);
      padding: 36px 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-subtle);
      transition: all 0.3s;
      color: var(--text-dark);
      height: 100%;
    }

    .card-custom:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-color: var(--electric-purple);
    }

    .icon-placeholder {
      width: 60px;
      height: 60px;
      background: var(--gradient-primary);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: white;
      margin-bottom: 20px;
    }

    .tag {
      background: rgba(108, 11, 255, 0.1);
      color: var(--electric-purple);
      border: 1px solid rgba(108, 11, 255, 0.25);
      border-radius: 20px;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-block;
    }

    .compare-bar {
      height: 12px;
      border-radius: 6px;
      background: #2A2A3C;
      margin: 10px 0;
    }

    .bar-fill {
      height: 100%;
      border-radius: 6px;
      background: var(--gradient-primary);
      width: 0%;
    }

    .accordion-button:not(.collapsed) {
      background-color: #F4F0FF;
      color: var(--electric-purple);
      box-shadow: none;
      border-left: 4px solid var(--electric-purple);
    }

    .accordion-item {
      border: 1px solid rgba(108,11,255,0.1);
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
    }

    footer {
      background: #06070f;
      padding: 60px 0 30px;
      color: #AAA;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.6rem;
      }
      section {
        padding: 80px 0;
      }
      .data-badge-grid {
        justify-content: center;
      }
    }