/* roulang page: index */
:root {
      --primary-deep: #0A3D3A;
      --accent-gold: #E87A3E;
      --bg-dark: #0B1E1C;
      --bg-light: #F5F2ED;
      --glass-bg: rgba(10, 61, 58, 0.25);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-warm: #EDE8E0;
      --text-muted: #A3B5B3;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
      --shadow-glow: 0 0 20px rgba(232, 122, 62, 0.5);
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", system-ui, sans-serif;
      --transition-smooth: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-dark);
      color: var(--text-warm);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }

    /* 覆盖Bootstrap默认 */
    .btn, .card, .navbar, .container {
      border-radius: var(--border-radius-card);
    }
    .btn {
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      letter-spacing: 0.03em;
      transition: var(--transition-smooth);
    }
    a {
      color: var(--text-muted);
      transition: var(--transition-smooth);
    }
    a:hover {
      color: var(--accent-gold);
    }

    /* 导航栏 - 分屏Hero联动 */
    .navbar-custom {
      background: rgba(11, 30, 28, 0.75);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      height: 56px;
      z-index: 1050;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .navbar-scrolled {
      background: rgba(11, 30, 28, 0.92);
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--accent-gold) !important;
      letter-spacing: 0.5px;
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 4px;
      padding: 0.5rem 0.8rem !important;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-gold) !important;
    }
    .btn-cta-nav {
      background: var(--accent-gold);
      color: #0B1E1C;
      border: none;
      padding: 6px 18px;
      font-weight: 600;
      border-radius: 20px;
      box-shadow: 0 0 12px rgba(232,122,62,0.4);
    }
    .btn-cta-nav:hover {
      background: #D4652A;
      box-shadow: 0 0 20px rgba(232,122,62,0.7);
    }

    /* Hero 分屏 */
    .hero-section {
      display: flex;
      min-height: 100vh;
      align-items: center;
      background: var(--bg-dark);
      margin-top: 0;
    }
    .hero-left {
      flex: 1;
      padding: 2rem 3rem;
      max-width: 560px;
      z-index: 2;
    }
    .hero-right {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 100vh;
    }
    .hero-right::after {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, transparent 20%, rgba(10,61,58,0.5));
      mix-blend-mode: overlay;
    }
    .hero-right .geo-overlay {
      position: absolute;
      top: 20%;
      left: 15%;
      width: 120px;
      height: 120px;
      border: 2px dashed rgba(232,122,62,0.3);
      border-radius: 50%;
      animation: float 6s infinite;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-15px); }
      100% { transform: translateY(0px); }
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--text-warm);
      line-height: 1.2;
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #E87A3E, transparent);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.02em;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
    }

    /* 玻璃卡片通用 */
    .glass-card {
      background: rgba(10, 61, 58, 0.25);
      backdrop-filter: blur(18px);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 16px;
      box-shadow: 0 8px 32px rgba(0,0,0,0.25);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(232,122,62,0.4);
      box-shadow: 0 10px 35px rgba(0,0,0,0.35);
    }

    /* 亮点网格非对称 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 2rem;
    }
    .feature-item {
      background: rgba(10, 61, 58, 0.3);
      backdrop-filter: blur(14px);
      border-radius: 16px;
      padding: 2rem 1.2rem;
      border: 1px solid rgba(255,255,255,0.06);
      transition: 0.3s;
    }
    .feature-item i {
      color: var(--accent-gold);
      font-size: 2rem;
      margin-bottom: 1rem;
    }

    /* 瀑布流案例 */
    .masonry-grid {
      column-count: 2;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: #15302E;
      border-radius: 16px;
      overflow: hidden;
      transition: 0.3s;
    }
    .masonry-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 表格 */
    .table-custom {
      background: rgba(10,61,58,0.2);
      color: var(--text-warm);
      border-radius: 16px;
      overflow: hidden;
    }
    .table-custom th {
      background: #0A3D3A;
      color: #EDE8E0;
    }

    /* FAQ手风琴双列 */
    .faq-left .faq-question {
      cursor: pointer;
      padding: 14px 16px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: 0.3s;
    }
    .faq-question.active {
      color: var(--accent-gold);
      border-left: 3px solid var(--accent-gold);
      background: rgba(232,122,62,0.08);
    }

    /* 响应式 */
    @media (max-width: 992px) {
      .hero-section {
        flex-direction: column;
      }
      .hero-right {
        min-height: 350px;
        width: 100%;
      }
      .hero-title {
        font-size: 2.3rem;
      }
      .masonry-grid {
        column-count: 1;
      }
      .feature-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }
    @media (max-width: 576px) {
      .feature-grid {
        grid-template-columns: 1fr;
      }
    }
    footer {
      background: #071412;
      border-top: 1px solid rgba(255,255,255,0.05);
    }