/* roulang page: index */
:root {
      --deep-indigo: #0A0E27;
      --dark-indigo2: #141B3D;
      --electric-cyan: #00E5FF;
      --amber-orange: #FF6D00;
      --glass-bg: rgba(15, 23, 42, 0.55);
      --glass-border: rgba(0, 229, 255, 0.18);
      --glass-hover-border: rgba(0, 229, 255, 0.4);
      --text-primary: #F1F5F9;
      --text-white: #FFFFFF;
      --text-muted: #94A3B8;
      --text-body: #CBD5E1;
      --card-bg-inner: #F8FAFC;
      --bg-secondary: #1E293B;
      --border-light: rgba(0, 229, 255, 0.08);
      --shadow-glow: 0 8px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(0,229,255,0.08);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.5), 0 0 24px rgba(0,229,255,0.15);
      --transition-base: 0.3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Inter", "SF Pro Display", system-ui, sans-serif;
      --border-radius-card: 16px;
      --border-radius-btn: 30px;
      --border-radius-search: 50px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-indigo);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      background-image: 
        linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    /* 覆盖 Bootstrap 默认样式 */
    .btn-primary, .btn-outline-primary, .btn {
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
      padding: 0.7rem 2rem;
      font-size: 1rem;
      letter-spacing: 0.3px;
    }
    .btn-primary {
      background-color: var(--electric-cyan);
      border-color: var(--electric-cyan);
      color: var(--deep-indigo);
      box-shadow: 0 0 20px rgba(0,229,255,0.5);
    }
    .btn-primary:hover, .btn-primary:focus {
      background-color: #33EAFF;
      border-color: #33EAFF;
      box-shadow: 0 0 30px rgba(0,229,255,0.7);
      color: var(--deep-indigo);
    }
    .btn-outline-primary {
      border: 1.5px solid var(--electric-cyan);
      color: var(--electric-cyan);
      background: transparent;
      box-shadow: none;
    }
    .btn-outline-primary:hover {
      background-color: rgba(0,229,255,0.1);
      border-color: var(--electric-cyan);
      color: var(--electric-cyan);
    }
    .btn-amber {
      background-color: var(--amber-orange);
      border-color: var(--amber-orange);
      color: white;
      box-shadow: 0 0 20px rgba(255,109,0,0.6);
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.7rem 2rem;
      transition: var(--transition-base);
    }
    .btn-amber:hover {
      background-color: #FF8F33;
      border-color: #FF8F33;
      color: white;
      box-shadow: 0 0 30px rgba(255,109,0,0.8);
    }

    /* 导航栏 */
    .navbar {
      background: rgba(10,14,39,0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,229,255,0.1);
      padding: 0.75rem 0;
      z-index: 1020;
    }
    .navbar-brand {
      font-weight: 700;
      color: var(--electric-cyan) !important;
      font-size: 1.4rem;
      letter-spacing: 0.5px;
    }
    .navbar-nav .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      transition: color 0.2s;
    }
    .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
      color: var(--electric-cyan) !important;
    }
    .search-wrapper {
      position: relative;
      max-width: 320px;
      width: 100%;
    }
    .search-wrapper input {
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(0,229,255,0.2);
      border-radius: 50px;
      color: white;
      padding: 0.5rem 1rem 0.5rem 2.5rem;
      font-size: 0.9rem;
      transition: var(--transition-base);
      width: 100%;
    }
    .search-wrapper input::placeholder {
      color: #64748B;
    }
    .search-wrapper input:focus {
      outline: none;
      border-color: var(--electric-cyan);
      box-shadow: 0 0 12px rgba(0,229,255,0.3);
      background: rgba(255,255,255,0.1);
    }
    .search-icon {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--electric-cyan);
      font-size: 1rem;
    }
    @media (max-width: 991px) {
      .search-wrapper {
        max-width: 100%;
        margin: 0.5rem 0;
      }
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-glow);
      transition: var(--transition-base);
      color: var(--text-primary);
    }
    .glass-card:hover {
      border-color: var(--glass-hover-border);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    /* Hero 区域 */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      background: linear-gradient(90deg, #0A0E27 0%, #141B3D 100%);
    }
    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.35;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.8) 0%, transparent 100%);
      z-index: 0;
    }
    @media (max-width: 768px) {
      .hero-bg-img {
        width: 100%;
        opacity: 0.2;
      }
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: clamp(2.2rem, 5vw, 4.5rem);
      font-weight: 800;
      line-height: 1.1;
      color: white;
      letter-spacing: -0.02em;
    }
    .floating-cards {
      position: relative;
      z-index: 2;
    }
    .mini-data-card {
      background: rgba(15,23,42,0.7);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(0,229,255,0.2);
      border-radius: 16px;
      padding: 1rem 1.5rem;
      color: white;
      box-shadow: 0 8px 20px rgba(0,0,0,0.5);
      transform: rotate(2deg);
      width: fit-content;
      margin-bottom: 1rem;
    }
    .mini-data-card:nth-child(2) {
      transform: rotate(-1deg);
      margin-left: 2rem;
    }
    .mini-data-card .number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--electric-cyan);
    }

    /* 区块标题 */
    .section-title {
      font-size: clamp(2rem, 4vw, 2.5rem);
      font-weight: 700;
      color: white;
      margin-bottom: 0.75rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 3px;
      background: var(--electric-cyan);
    }
    .subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    /* 指标数字 */
    .metric-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--electric-cyan);
      font-feature-settings: "tnum";
      line-height: 1.2;
    }

    /* 表格覆盖 */
    .table-comparison {
      background: transparent;
      color: var(--text-body);
    }
    .table-comparison thead th {
      background: rgba(0,229,255,0.1);
      color: var(--electric-cyan);
      border-bottom: 1px solid var(--border-light);
      font-weight: 600;
    }
    .table-comparison td, .table-comparison th {
      border-color: var(--border-light);
      padding: 1rem;
    }
    .table-comparison tbody tr {
      background: rgba(255,255,255,0.02);
    }
    .check-icon {
      color: var(--amber-orange);
      font-weight: bold;
    }

    /* FAQ 手风琴 */
    .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 1rem;
    }
    .accordion-button {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--border-radius-card) !important;
      color: var(--text-primary);
      font-weight: 500;
      padding: 1.2rem 1.5rem;
      transition: var(--transition-base);
    }
    .accordion-button:not(.collapsed) {
      background: rgba(0,229,255,0.08);
      color: white;
      box-shadow: none;
      border-color: var(--electric-cyan);
    }
    .accordion-button::after {
      filter: brightness(0) invert(1);
    }
    .accordion-body {
      background: rgba(0,229,255,0.03);
      color: var(--text-body);
      border-radius: 0 0 16px 16px;
      padding: 1.5rem;
    }

    /* 表单 */
    .form-control-custom {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(0,229,255,0.2);
      border-radius: 30px;
      color: white;
      padding: 0.7rem 1.5rem;
      transition: var(--transition-base);
    }
    .form-control-custom:focus {
      background: rgba(255,255,255,0.1);
      border-color: var(--electric-cyan);
      box-shadow: 0 0 12px rgba(0,229,255,0.3);
      color: white;
    }

    footer {
      background: #070B1F;
      border-top: 1px solid rgba(0,229,255,0.1);
    }