/* roulang page: index */
:root {
      --bs-body-bg: #0A0E27;
      --bs-body-color: #B0B8C8;
      --bs-primary: #C8A96E;
      --bs-secondary: #3B82F6;
      --bs-border-radius: 0.5rem;
      --bs-border-color: rgba(255,255,255,0.08);
      --gold: #C8A96E;
      --gold-light: #F5D78C;
      --electric-blue: #3B82F6;
      --deep-bg: #0A0E27;
      --footer-bg: #060A1A;
      --card-bg: rgba(255,255,255,0.03);
      --card-border: rgba(255,255,255,0.08);
      --text-body: #B0B8C8;
      --text-muted: #6B7280;
      --text-white: #FFFFFF;
      --glow-gold: 0 0 20px rgba(200,169,110,0.4);
      --glow-blue: 0 0 15px rgba(59,130,246,0.5);
      --font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --font-number: "DIN Alternate", "Roboto Mono", monospace;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-heading);
      background-color: var(--deep-bg);
      color: var(--text-body);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--text-body);
      text-decoration: none;
      transition: color 0.3s ease;
    }
    a:hover {
      color: var(--gold);
    }

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

    button, input, textarea, select {
      font-family: inherit;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 0.5rem;
      color: var(--text-white);
    }

    h1 {
      font-size: clamp(2rem, 5vw, 3.5rem);
    }
    h2 {
      font-size: clamp(1.8rem, 4vw, 2.5rem);
    }
    h3 {
      font-size: 1.75rem;
    }
    h4 {
      font-size: 1.25rem;
    }

    .container {
      max-width: 1140px;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 自定义 Bootstrap 覆盖 */
    .btn {
      border-radius: 50px;
      padding: 12px 32px;
      font-weight: 600;
      transition: all 0.3s ease;
      border: none;
    }
    .btn-primary {
      background: linear-gradient(135deg, #C8A96E, #B8944A);
      color: #fff;
      box-shadow: 0 0 15px rgba(200,169,110,0.3);
      border: 1px solid rgba(255,255,255,0.2);
    }
    .btn-primary:hover {
      box-shadow: 0 0 25px rgba(200,169,110,0.6);
      filter: brightness(1.1);
      transform: translateY(-2px);
      color: #fff;
    }
    .btn-outline-primary {
      border: 1px solid var(--gold);
      color: var(--gold);
      background: transparent;
    }
    .btn-outline-primary:hover {
      background: rgba(200,169,110,0.15);
      color: var(--gold-light);
      border-color: var(--gold-light);
      box-shadow: 0 0 15px rgba(200,169,110,0.4);
    }

    .card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 16px;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: 0 4px 24px rgba(0,0,0,0.3);
      transition: all 0.3s ease;
    }
    .card:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 40px rgba(0,0,0,0.5);
      border-color: rgba(200,169,110,0.3);
      box-shadow: 0 0 25px rgba(200,169,110,0.2);
    }

    /* Dock 导航 */
    .dock-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1030;
      width: auto;
      max-width: 90%;
      background: rgba(10,14,39,0.75);
      backdrop-filter: blur(25px);
      -webkit-backdrop-filter: blur(25px);
      border: 1px solid rgba(200,169,110,0.25);
      border-radius: 50px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .dock-logo {
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--gold);
      display: flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }
    .dock-links {
      display: flex;
      gap: 1.5rem;
      align-items: center;
    }
    .dock-links a {
      color: #ccc;
      font-weight: 500;
      transition: 0.3s;
      white-space: nowrap;
    }
    .dock-links a:hover {
      color: var(--gold);
    }
    .dock-cta {
      margin-left: 1rem;
    }
    .navbar-toggler {
      border: none;
      color: white;
      font-size: 1.5rem;
      display: none;
    }

    @media (max-width: 992px) {
      .dock-links, .dock-cta {
        display: none;
      }
      .navbar-toggler {
        display: block;
        background: none;
      }
      .dock-nav {
        justify-content: space-between;
      }
      .mobile-menu {
        position: absolute;
        top: 70px;
        left: 5%;
        width: 90%;
        background: rgba(10,14,39,0.95);
        backdrop-filter: blur(30px);
        border-radius: 24px;
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        display: none;
        border: 1px solid rgba(200,169,110,0.3);
      }
      .mobile-menu.active {
        display: flex;
      }
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: radial-gradient(circle at 30% 40%, #1a1f3a, #0A0E27);
      position: relative;
      display: flex;
      align-items: center;
      overflow: hidden;
      padding-top: 100px;
    }
    .hero-bg-decor {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mask-image: radial-gradient(circle at center, black 30%, transparent 70%);
    }
    .gradient-text {
      background: linear-gradient(135deg, #C8A96E, #F5D78C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 板块间距 */
    section {
      padding: 100px 0;
      position: relative;
    }

    .glass-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.08);
      backdrop-filter: blur(18px);
      border-radius: 16px;
    }

    .metric-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--electric-blue);
      text-shadow: 0 0 12px rgba(59,130,246,0.5);
    }

    .comparison-bad {
      background: rgba(255,255,255,0.02);
      color: #9ca3af;
    }
    .comparison-good {
      background: rgba(200,169,110,0.06);
      border: 1px solid rgba(200,169,110,0.2);
      color: white;
      box-shadow: 0 0 18px rgba(200,169,110,0.1);
    }

    .accordion-button {
      background: transparent;
      color: white;
      font-weight: 600;
      box-shadow: none;
    }
    .accordion-item {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.08);
      margin-bottom: 12px;
      border-radius: 12px;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(255,255,255,0.05);
      color: var(--gold);
    }
    .form-control {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      color: white;
      border-radius: 8px;
      padding: 0.75rem 1rem;
    }
    .form-control:focus {
      border-color: var(--gold);
      box-shadow: 0 0 10px rgba(200,169,110,0.3);
      background: rgba(255,255,255,0.08);
    }
    footer {
      background: #060A1A;
    }