/* roulang page: index */
:root {
      --deep-blue: #0B0E1A;
      --bg-darker: #060912;
      --electric-cyan: #00E5FF;
      --amber-orange: #FF6D00;
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-primary: #FFFFFF;
      --text-body: #B0C4DE;
      --text-muted: #7B8FA1;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 16px 48px rgba(0,229,255,0.15);
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --border-radius-tag: 4px;
      --gradient-cta: linear-gradient(135deg, #00E5FF, #FF6D00);
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--deep-blue);
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      color: var(--text-body);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 25% 20%, rgba(0,229,255,0.03) 0%, transparent 40%);
    }

    /* 自定义容器微调 */
    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 玻璃拟态卡片基础 */
    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, box-shadow 0.3s ease, border-color 0.2s;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
      border-color: rgba(0, 229, 255, 0.25);
    }

    /* 排版辅助 */
    h1, h2, h3, .h1, .h2, .h3 {
      color: var(--text-primary);
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }
    .section-title {
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 3px;
      background: var(--gradient-cta);
      border-radius: 2px;
    }
    .text-accent {
      color: var(--electric-cyan);
    }
    .text-amber {
      color: var(--amber-orange);
    }

    /* 导航栏 */
    .navbar-custom {
      background: rgba(11, 14, 26, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.2);
      padding: 12px 0;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-custom .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
    }
    .navbar-custom .navbar-brand i {
      color: var(--electric-cyan);
      font-size: 1.8rem;
    }
    .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      font-size: 0.9rem;
      margin: 0 8px;
      transition: 0.2s;
      padding: 8px 12px !important;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--electric-cyan) !important;
    }
    .btn-outline-login {
      border: 1px solid rgba(255,255,255,0.3);
      color: var(--text-primary);
      padding: 8px 18px;
      border-radius: 8px;
      font-weight: 500;
      background: transparent;
      transition: 0.2s;
    }
    .btn-outline-login:hover {
      background: rgba(255,255,255,0.05);
      border-color: white;
      color: white;
    }
    .btn-primary-glow {
      background: var(--gradient-cta);
      border: none;
      color: white;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: 8px;
      box-shadow: 0 4px 20px rgba(0,229,255,0.4);
      transition: 0.25s;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .btn-primary-glow:hover {
      box-shadow: 0 8px 28px rgba(0,229,255,0.7);
      transform: scale(1.02);
      color: white;
    }

    /* Hero 区域 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(ellipse at 30% 40%, rgba(0,229,255,0.08) 0%, transparent 50%);
      padding: 100px 0 80px;
    }
    .hero-title {
      background: linear-gradient(to right, #fff, #00E5FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-graphic-card {
      background: rgba(255,255,255,0.02);
      backdrop-filter: blur(20px);
      border-radius: 24px;
      border: 1px solid rgba(255,255,255,0.1);
      padding: 20px;
      animation: float 6s ease-in-out infinite;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      min-height: 380px;
      position: relative;
      overflow: hidden;
    }
    .hero-graphic-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(11,14,26,0.65);
      backdrop-filter: blur(6px);
      border-radius: 24px;
    }
    .graphic-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      justify-content: center;
      height: 100%;
      color: white;
      text-shadow: 0 2px 10px black;
    }
    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0); }
    }

    /* 亮点网格 */
    .feature-icon {
      font-size: 2.2rem;
      color: var(--electric-cyan);
      margin-bottom: 1.2rem;
    }
    .decor-line {
      width: 40px;
      height: 2px;
      background: var(--gradient-cta);
      margin: 12px 0 16px;
    }

    /* 方案瀑布卡片 */
    .solution-card {
      border-radius: 20px;
      overflow: hidden;
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      height: 100%;
      transition: all 0.25s;
    }
    .solution-card:hover {
      border-color: var(--electric-cyan);
      box-shadow: var(--shadow-glow);
    }
    .solution-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .tag-amber {
      background: var(--amber-orange);
      color: white;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 600;
    }

    /* 横向滚动案例 */
    .scroll-container {
      display: flex;
      overflow-x: auto;
      gap: 24px;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .scroll-container::-webkit-scrollbar {
      display: none;
    }
    .case-card {
      flex: 0 0 340px;
      scroll-snap-align: start;
      border-radius: 20px;
      height: 360px;
      background-size: cover;
      background-position: center;
      position: relative;
      overflow: hidden;
    }
    .case-overlay {
      background: linear-gradient(to top, rgba(0,0,0,0.8) 20%, transparent 100%);
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 24px;
      color: white;
    }

    /* 对比表 */
    .compare-table .compare-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    /* FAQ */
    .accordion-faq .accordion-button {
      background: transparent;
      color: var(--text-primary);
      font-weight: 600;
      border: none;
      box-shadow: none;
      padding: 20px 0;
      font-size: 1.1rem;
    }
    .accordion-faq .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--electric-cyan);
    }
    .accordion-faq .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    /* CTA 区域 */
    .cta-section {
      background: radial-gradient(circle at center, rgba(0,229,255,0.12) 0%, var(--deep-blue) 70%);
    }

    footer {
      background: var(--bg-darker);
      border-top: 1px solid rgba(255,255,255,0.05);
    }

    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .hero-graphic-card { min-height: 260px; margin-top: 30px; }
      .navbar-collapse { background: rgba(11,14,26,0.95); padding: 20px; border-radius: 16px; }
    }