/* roulang page: index */
:root {
      --primary-deep: #0A0F24;
      --accent-green: #00F0A8;
      --accent-red: #FF4D6A;
      --card-bg: #141B33;
      --light-section: #F4F6FC;
      --text-white: #FFFFFF;
      --text-gray: #B0B8D0;
      --text-dark: #0A0F24;
      --text-dark-secondary: #3A4058;
      --border-subtle: rgba(0, 240, 168, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 16px 48px rgba(0, 240, 168, 0.15);
      --radius-card: 16px;
      --radius-badge: 20px;
      --radius-btn: 40px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background-color: var(--primary-deep);
      color: var(--text-gray);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      padding-top: 80px;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      color: var(--text-white);
      font-weight: 700;
    }
    .text-dark {
      color: var(--text-dark) !important;
    }
    .text-dark-secondary {
      color: var(--text-dark-secondary);
    }
    a {
      text-decoration: none;
      transition: all 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 导航栏 */
    .navbar-custom {
      background: rgba(10, 15, 36, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      padding: 0.8rem 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
    }
    .logo-text {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-white);
      letter-spacing: 1px;
    }
    .logo-highlight {
      color: var(--accent-green);
    }
    .nav-link-custom {
      color: var(--text-gray) !important;
      font-weight: 500;
      padding: 0.5rem 1.2rem !important;
      font-size: 0.95rem;
      position: relative;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--accent-green) !important;
    }
    .nav-link-custom::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 1.2rem;
      right: 1.2rem;
      height: 2px;
      background: var(--accent-green);
      transform: scaleX(0);
      transition: transform 0.2s;
    }
    .nav-link-custom:hover::after,
    .nav-link-custom.active::after {
      transform: scaleX(1);
    }
    .badge-live {
      background: var(--accent-red);
      color: white;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 0.25rem 0.7rem;
      border-radius: 20px;
      letter-spacing: 0.5px;
      margin-left: 0.5rem;
    }
    .btn-primary-glow {
      background: linear-gradient(135deg, var(--accent-green) 0%, #00C98A 100%);
      border: none;
      color: var(--primary-deep);
      font-weight: 700;
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-btn);
      transition: 0.2s;
      box-shadow: 0 4px 12px rgba(0, 240, 168, 0.3);
    }
    .btn-primary-glow:hover {
      box-shadow: 0 8px 20px rgba(0, 240, 168, 0.5);
      transform: translateY(-1px);
      color: var(--primary-deep);
      background: var(--accent-green);
    }
    .navbar-toggler {
      border-color: rgba(255,255,255,0.3);
    }
    .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(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    @media (max-width: 991px) {
      .navbar-collapse {
        background: rgba(10,15,36,0.95);
        backdrop-filter: blur(20px);
        padding: 1.5rem;
        border-radius: var(--radius-card);
        margin-top: 1rem;
      }
      .nav-link-custom {
        padding: 0.8rem 1rem !important;
        font-size: 1.1rem;
      }
      .mobile-cta {
        margin-top: 1rem;
      }
    }
    /* Hero */
    .hero-section {
      background: radial-gradient(circle at 20% 30%, #1a2444 0%, var(--primary-deep) 70%);
      padding: 4rem 0 5rem;
      position: relative;
      overflow: hidden;
    }
    .hero-dashboard-img {
      background: rgba(20,27,51,0.7);
      border-radius: var(--radius-card);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-card);
      backdrop-filter: blur(4px);
    }
    .stat-badge {
      background: rgba(20,27,51,0.8);
      border-radius: var(--radius-badge);
      padding: 0.5rem 1.2rem;
      border: 1px solid var(--border-subtle);
      display: inline-flex;
      align-items: baseline;
      gap: 0.4rem;
      backdrop-filter: blur(4px);
    }
    .stat-number {
      color: var(--accent-green);
      font-weight: 800;
      font-size: 1.8rem;
      line-height: 1;
    }
    .btn-outline-green {
      border: 2px solid var(--accent-green);
      color: var(--accent-green);
      background: transparent;
      font-weight: 600;
      padding: 0.6rem 2rem;
      border-radius: var(--radius-btn);
    }
    .btn-outline-green:hover {
      background: rgba(0,240,168,0.1);
      color: var(--accent-green);
    }
    /* 卡片系统 */
    .card-dark {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-card);
      padding: 2rem;
      transition: transform 0.2s, box-shadow 0.2s;
      height: 100%;
    }
    .card-dark:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0,240,168,0.4);
    }
    .icon-green {
      color: var(--accent-green);
      font-size: 2rem;
      margin-bottom: 1rem;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
    }
    .section-desc {
      color: var(--text-gray);
      max-width: 700px;
      margin: 0 auto 2.5rem;
    }
    .light-bg {
      background-color: var(--light-section);
    }
    .feature-list {
      list-style: none;
      padding-left: 0;
    }
    .feature-list li::before {
      content: "●";
      color: var(--accent-green);
      font-weight: bold;
      display: inline-block;
      width: 1.2em;
      margin-left: -1em;
    }
    .scenario-tag {
      background: rgba(0,240,168,0.15);
      color: var(--accent-green);
      padding: 0.2rem 1rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .case-scroll {
      display: flex;
      overflow-x: auto;
      gap: 1.5rem;
      padding-bottom: 1rem;
      scrollbar-width: thin;
      scrollbar-color: var(--accent-green) var(--card-bg);
    }
    .case-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .case-scroll::-webkit-scrollbar-track {
      background: var(--card-bg);
      border-radius: 10px;
    }
    .case-scroll::-webkit-scrollbar-thumb {
      background: var(--accent-green);
      border-radius: 10px;
    }
    .case-card {
      min-width: 280px;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
      position: relative;
      overflow: hidden;
      height: 220px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 1.5rem;
      border: 1px solid var(--border-subtle);
    }
    .case-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(10,15,36,0.9) 0%, rgba(10,15,36,0.4) 100%);
      z-index: 1;
    }
    .case-content {
      position: relative;
      z-index: 2;
      color: white;
    }
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: 0 8px 30px rgba(0,0,0,0.05);
      border: 1px solid transparent;
      transition: 0.2s;
    }
    .pricing-card.recommended {
      border: 2px solid var(--accent-green);
      position: relative;
    }
    .badge-popular {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--accent-red);
      color: white;
      padding: 0.3rem 1.2rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
    }
    .accordion-button:not(.collapsed) {
      background-color: var(--card-bg);
      color: var(--accent-green);
      box-shadow: none;
    }
    .accordion-button {
      background-color: var(--card-bg);
      color: var(--text-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card) !important;
      font-weight: 600;
    }
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 1rem;
    }
    .footer-link {
      color: var(--text-gray);
      transition: 0.2s;
    }
    .footer-link:hover {
      color: var(--accent-green);
    }
    .social-icon {
      width: 40px;
      height: 40px;
      border: 1px solid var(--text-gray);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--text-gray);
      margin-right: 0.5rem;
    }
    .social-icon:hover {
      border-color: var(--accent-green);
      color: var(--accent-green);
    }
    @media (max-width: 768px) {
      .section-title {
        font-size: 2rem;
      }
      .hero-section {
        padding: 2rem 0 3rem;
      }
    }