/* roulang page: index */
:root {
      --primary: #1A5F3A;
      --accent: #F5A623;
      --bg-light: #F9FAF7;
      --bg-dark: #0D2B1A;
      --text-dark: #1E2A1E;
      --text-body: #3A4A3A;
      --text-muted: rgba(255,255,255,0.7);
      --border-light: #E8EDE5;
      --card-shadow: 0 2px 12px rgba(26,95,58,0.08);
      --card-shadow-hover: 0 8px 30px rgba(26,95,58,0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 6px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", monospace;
      --transition: all 0.25s ease;
      --bs-body-font-family: var(--font-sans);
      --bs-body-color: var(--text-body);
      --bs-body-bg: var(--bg-light);
    }

    * {
      box-sizing: border-box;
    }

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

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-dark);
      font-weight: 600;
      line-height: 1.4;
    }

    h1 {
      font-size: 42px;
      font-weight: 700;
      letter-spacing: 0.5px;
      line-height: 1.3;
    }

    h2 {
      font-size: 32px;
      margin-bottom: 24px;
    }

    h3 {
      font-size: 20px;
    }

    .text-mono {
      font-family: var(--font-mono);
    }

    .section-padding {
      padding: 80px 0;
    }

    .bg-dark-green {
      background-color: var(--bg-dark);
    }

    .bg-light-green {
      background-color: var(--bg-light);
    }

    .container {
      max-width: 1200px;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.03);
      padding: 0.8rem 1rem;
    }

    .navbar-brand {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .navbar-brand i {
      font-size: 2rem;
      color: var(--accent);
    }

    .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      margin: 0 0.2rem;
      position: relative;
      transition: var(--transition);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s;
    }

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

    .nav-link:hover {
      color: var(--primary) !important;
    }

    .status-badge {
      background: #FFF3E0;
      color: var(--accent);
      border-radius: 50px;
      padding: 0.2rem 1rem;
      font-size: 0.8rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.3); }
      100% { opacity: 1; transform: scale(1); }
    }

    .btn-primary-custom {
      background: var(--accent);
      border: none;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(245,166,35,0.2);
    }

    .btn-primary-custom:hover {
      background: #E09510;
      box-shadow: 0 6px 18px rgba(245,166,35,0.4);
      transform: scale(1.02);
      color: white;
    }

    .btn-outline-green {
      border: 2px solid var(--primary);
      background: transparent;
      color: var(--primary);
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline-green:hover {
      background: var(--primary);
      color: white;
    }

    .btn-ghost-white {
      border: 2px solid white;
      color: white;
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-ghost-white:hover {
      background: rgba(255,255,255,0.15);
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(rgba(13,43,26,0.75), rgba(13,43,26,0.7)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }

    .hero-badge {
      background: rgba(245,166,35,0.2);
      color: var(--accent);
      padding: 0.4rem 1.4rem;
      border-radius: 50px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 1.5rem;
    }

    .hero-stats .stat-item {
      font-family: var(--font-mono);
    }

    /* 卡片系统 */
    .card-custom {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      padding: 28px;
      transition: var(--transition);
      height: 100%;
    }

    .card-custom:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }

    .dark-card {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-card);
      padding: 24px;
      color: white;
      transition: var(--transition);
    }

    .dark-card:hover {
      background: rgba(255,255,255,0.15);
      transform: scale(1.03);
    }

    .icon-circle {
      width: 60px;
      height: 60px;
      background: rgba(26,95,58,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      color: var(--primary);
      margin-bottom: 1.2rem;
    }

    /* 对比表 */
    .compare-card {
      border-radius: var(--radius-card);
      padding: 28px;
    }

    .compare-highlight {
      border: 2px solid var(--accent);
      box-shadow: 0 8px 24px rgba(245,166,35,0.25);
    }

    /* FAQ */
    .accordion-button {
      background: var(--bg-light);
      color: var(--text-dark);
      font-weight: 600;
      border-radius: var(--radius-btn) !important;
      box-shadow: none !important;
      padding: 1.2rem 1.5rem;
    }

    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--primary);
      border-left: 4px solid var(--primary);
    }

    .accordion-button:focus {
      box-shadow: 0 0 0 0.2rem rgba(26,95,58,0.25);
    }

    /* 表单 */
    .form-control-custom {
      background: rgba(255,255,255,0.15);
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: var(--radius-btn);
      color: white;
      padding: 14px 20px;
    }

    .form-control-custom::placeholder {
      color: rgba(255,255,255,0.5);
    }

    .form-control-custom:focus {
      background: rgba(255,255,255,0.25);
      border-color: var(--accent);
      box-shadow: 0 0 0 0.2rem rgba(245,166,35,0.4);
      color: white;
    }

    /* 动画 */
    .fade-in-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-in-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    footer a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      transition: var(--transition);
    }

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

    @media (max-width: 768px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 26px;
      }
      .section-padding {
        padding: 60px 0;
      }
      .navbar-nav {
        background: white;
        border-radius: 12px;
        padding: 1rem;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        margin-top: 0.5rem;
      }
    }