/* roulang page: index */
:root {
      --deep-space: #0B0E2A;
      --card-bg: #1A1D35;
      --gold: #F2C94C;
      --gold-bright: #FFD700;
      --purple: #7B61FF;
      --white-mist: rgba(255,255,255,0.9);
      --white-soft: rgba(255,255,255,0.75);
      --white-dim: rgba(255,255,255,0.3);
      --border-light: rgba(255,255,255,0.08);
      --border-hover: rgba(255,255,255,0.2);
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --glow-gold: 0 0 20px rgba(242,201,76,0.4);
      --bs-primary: #F2C94C;
      --bs-dark: #0B0E2A;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--deep-space);
      color: var(--white-soft);
      line-height: 1.8;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: 0.5px;
    }

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

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

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

    button, .btn {
      font-weight: 600;
      border-radius: 12px;
      transition: all 0.25s ease;
      border: none;
      letter-spacing: 0.3px;
    }

    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }

    section {
      padding: 100px 0;
      position: relative;
    }

    @media (max-width: 768px) {
      section {
        padding: 70px 0;
      }
      h1.golden-text {
        font-size: 2.2rem !important;
      }
      h2 {
        font-size: 1.8rem !important;
      }
    }

    /* 导航栏 - 沉浸式玻璃 */
    .navbar {
      background: rgba(11,14,42,0.4);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-light);
      transition: background 0.3s ease, box-shadow 0.3s ease;
      z-index: 1030;
    }

    .navbar.scrolled {
      background: rgba(11,14,42,0.95);
      backdrop-filter: blur(8px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }

    .navbar-brand {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--gold) !important;
      letter-spacing: 1px;
    }

    .nav-link {
      color: rgba(255,255,255,0.85) !important;
      margin: 0 8px;
      font-weight: 500;
      transition: color 0.2s;
    }

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

    .btn-nav-cta {
      background: var(--gold);
      color: var(--deep-space);
      padding: 8px 22px;
      border-radius: 12px;
      font-weight: 600;
      box-shadow: var(--glow-gold);
      margin-left: 12px;
      border: none;
    }

    .btn-nav-cta:hover {
      background: var(--gold-bright);
      box-shadow: 0 0 28px rgba(242,201,76,0.7);
      color: #000;
    }

    .navbar-toggler {
      border-color: var(--gold);
      padding: 4px 8px;
    }

    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(242,201,76,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
    }

    @media (max-width: 768px) {
      .navbar-collapse {
        background: rgba(11,14,42,0.95);
        backdrop-filter: blur(15px);
        border-radius: 12px;
        margin-top: 10px;
        padding: 12px;
      }
      .btn-nav-cta {
        margin-left: 0;
        margin-top: 8px;
      }
    }

    /* 主按钮 */
    .btn-primary-gold {
      background: var(--gold);
      color: var(--deep-space);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: 12px;
      box-shadow: var(--glow-gold);
      border: none;
    }

    .btn-primary-gold:hover {
      background: var(--gold-bright);
      box-shadow: 0 0 35px rgba(242,201,76,0.8);
      transform: translateY(-2px);
      color: #000;
    }

    .btn-outline-light {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: white;
      padding: 12px 32px;
      border-radius: 12px;
      font-weight: 500;
    }

    .btn-outline-light:hover {
      border-color: var(--gold);
      color: var(--gold);
      background: rgba(242,201,76,0.05);
    }

    /* 卡片玻璃拟态 */
    .glass-card {
      background: rgba(26,29,53,0.6);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.05);
      transition: all 0.3s ease;
      height: 100%;
    }

    .glass-card:hover {
      backdrop-filter: blur(16px);
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: 0 12px 36px rgba(0,0,0,0.5);
    }

    @media (max-width: 768px) {
      .glass-card:hover {
        transform: none;
        border-color: var(--border-light);
      }
    }

    .golden-text {
      background: linear-gradient(135deg, #F2C94C, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 700;
    }

    .star-bg {
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      background: radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.4), transparent),
                  radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.3), transparent),
                  radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.5), transparent),
                  radial-gradient(1px 1px at 130px 80px, #F2C94C, transparent);
      background-size: 200px 200px;
      animation: starMove 30s linear infinite;
      pointer-events: none;
    }

    @keyframes starMove {
      0% { background-position: 0 0; }
      100% { background-position: 200px 200px; }
    }

    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #0B0E2A 0%, #1A1D35 100%);
      position: relative;
      overflow: hidden;
    }

    .feature-icon {
      font-size: 2.5rem;
      color: var(--gold);
      margin-bottom: 20px;
    }

    .number-gold {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.2;
    }

    @media (max-width: 768px) {
      .number-gold {
        font-size: 2rem;
      }
    }

    .accordion-button {
      background: rgba(26,29,53,0.45);
      color: white;
      font-weight: 500;
      border-bottom: 1px solid var(--border-light);
      box-shadow: none;
      border-radius: 12px !important;
      padding: 18px 24px;
    }

    .accordion-button:not(.collapsed) {
      background: rgba(255,255,255,0.05);
      color: var(--gold);
      box-shadow: none;
    }

    .accordion-button::after {
      filter: brightness(0) invert(1);
    }

    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 10px;
    }

    .accordion-body {
      color: rgba(255,255,255,0.7);
      background: rgba(11,14,42,0.3);
      border-radius: 0 0 12px 12px;
    }

    .cta-section {
      background: #0B0E2A;
      background-image: radial-gradient(circle at 30% 40%, rgba(123,97,255,0.15) 0%, transparent 50%);
    }

    footer a {
      color: rgba(255,255,255,0.6);
    }

    footer a:hover {
      color: var(--gold);
    }

    .footer-logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--gold);
    }

    .step-circle {
      width: 48px;
      height: 48px;
      border: 2px solid var(--gold);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: white;
      margin: 0 auto 12px;
      font-size: 1.2rem;
    }