/* roulang page: index */
:root {
      --primary-deep: #1A0B2E;
      --primary-bg: #0F0A1A;
      --accent-gold: #F5A623;
      --accent-orange: #FF6B35;
      --text-white: #FFFFFF;
      --text-muted: #B8B0C7;
      --text-footer: #6B6380;
      --card-bg: rgba(255,255,255,0.04);
      --border-gold: rgba(245,166,35,0.25);
      --border-glow: rgba(245,166,35,0.5);
      --radius-card: 20px;
      --radius-inner: 12px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-hover: 0 16px 48px rgba(245,166,35,0.15);
      --container-max: 1280px;
      --font-h1: 48px;
      --font-h2: 36px;
      --font-h3: 20px;
      --font-body: 16px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--primary-bg);
      color: var(--text-white);
      line-height: 1.75;
      font-size: var(--font-body);
      background-image: radial-gradient(circle at 30% 20%, rgba(245,166,35,0.03) 0%, transparent 40%);
      background-attachment: fixed;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: rgba(15, 10, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      border-bottom: 1px solid rgba(245,166,35,0.1);
      transition: all 0.3s ease;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 700;
      background: linear-gradient(135deg, #F5A623 0%, #FFB347 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 0.5px;
      text-decoration: none;
    }
    .logo i {
      background: none;
      -webkit-text-fill-color: #F5A623;
      font-size: 28px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-gold);
    }

    .btn-primary {
      background: var(--accent-gold);
      border: none;
      color: #0F0A1A;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-inner);
      cursor: pointer;
      font-size: 16px;
      transition: all 0.25s;
      text-decoration: none;
      display: inline-block;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background: var(--accent-orange);
      box-shadow: 0 0 20px rgba(255,107,53,0.5);
      transform: translateY(-1px);
    }

    .btn-outline-light {
      background: transparent;
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-inner);
      cursor: pointer;
      transition: 0.25s;
      text-decoration: none;
    }
    .btn-outline-light:hover {
      background: rgba(245,166,35,0.1);
      border-color: var(--accent-orange);
      color: var(--accent-orange);
    }

    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: #1A0B2E;
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(245,166,35,0.2);
      justify-content: space-around;
      padding: 8px 16px;
      z-index: 1000;
    }
    .mobile-nav a {
      color: var(--text-muted);
      text-decoration: none;
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 12px;
      gap: 4px;
    }
    .mobile-nav a i {
      font-size: 20px;
    }
    .mobile-nav a.active {
      color: var(--accent-gold);
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      min-height: 90vh;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      background-blend-mode: overlay;
      background-color: rgba(15,10,26,0.7);
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 450px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      background: linear-gradient(to right, #fff, #F5A623);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 36px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-data-card {
      flex: 0 0 320px;
      background: rgba(26,11,46,0.7);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-gold);
      border-radius: 24px;
      padding: 28px;
      box-shadow: var(--shadow-card);
    }
    .stat-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 18px;
    }
    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--accent-orange);
    }
    .stat-label {
      color: var(--text-muted);
    }

    section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .section-sub {
      color: var(--text-muted);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }

    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius-card);
      padding: 32px 20px;
      text-align: center;
      transition: all 0.25s;
    }
    .stat-card:hover {
      border-color: var(--accent-gold);
      transform: scale(1.02);
    }
    .stat-icon {
      font-size: 30px;
      color: var(--accent-gold);
      margin-bottom: 12px;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      display: flex;
      gap: 20px;
      transition: 0.2s;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 60px;
      height: 60px;
      background: linear-gradient(135deg, #F5A623, #FF6B35);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      color: #0F0A1A;
      flex-shrink: 0;
    }

    /* 效果对比 */
    .results-flex {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
    }
    .compare-card {
      flex: 1 1 280px;
      background: rgba(0,0,0,0.3);
      border-radius: var(--radius-card);
      padding: 28px;
      border: 1px solid rgba(255,255,255,0.05);
    }
    .compare-card.highlight {
      border: 1px solid var(--accent-gold);
      background: rgba(245,166,35,0.05);
    }
    .progress-bar {
      height: 8px;
      background: rgba(255,255,255,0.1);
      border-radius: 4px;
      margin: 16px 0;
    }
    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, #F5A623, #FF6B35);
      border-radius: 4px;
      width: 0%;
    }

    /* FAQ */
    .faq-item {
      background: rgba(255,255,255,0.03);
      border-radius: 12px;
      margin-bottom: 16px;
      border-left: 4px solid var(--accent-gold);
      transition: 0.2s;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-muted);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(180deg, #1A0B2E 0%, #0F0A1A 100%);
      text-align: center;
    }
    .cta-form {
      display: flex;
      gap: 16px;
      max-width: 600px;
      margin: 30px auto 0;
      flex-wrap: wrap;
    }
    .cta-form input {
      flex: 1;
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      padding: 14px;
      border-radius: 12px;
      color: white;
    }
    .cta-form input:focus {
      border-color: var(--accent-gold);
      outline: none;
    }

    footer {
      background: #0A0512;
      padding: 60px 0 30px;
      color: var(--text-footer);
    }

    @media (max-width: 1024px) {
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-nav { display: flex; }
      .hero-content { flex-direction: column; }
      .stats-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 36px; }
    }