/* roulang page: index */
:root {
      --primary-deep: #1E0A3C;
      --primary-midnight: #0B1D3A;
      --accent-gold: #F5B642;
      --accent-rosegold: #E8A87C;
      --highlight-cyan: #00E5CC;
      --highlight-purple: #C77DFF;
      --bg-dark: #0F0F1A;
      --bg-card: rgba(255, 255, 255, 0.04);
      --border-light: rgba(255, 255, 255, 0.08);
      --border-hover: rgba(245, 182, 66, 0.6);
      --text-primary: #FFFFFF;
      --text-secondary: #B0B0C0;
      --text-muted: #8888A0;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.6);
      --radius-card: 18px;
      --radius-btn: 30px;
      --transition: 0.25s ease;
      --font-mont: 'Montserrat', 'Inter', system-ui, sans-serif;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
    }
    body {
      font-family: var(--font-sans);
      background: var(--bg-dark);
      color: var(--text-secondary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, .data-number, .nav-logo, .cta-btn {
      font-family: var(--font-mont);
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 56px;
      color: var(--accent-gold);
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
      line-height: 1.2;
    }
    h2 {
      font-size: 36px;
      color: var(--text-primary);
      margin-bottom: 16px;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
      color: var(--text-primary);
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, .cta-btn {
      cursor: pointer;
      font-family: var(--font-mont);
      font-weight: 600;
    }
    .section {
      padding: 80px 0;
      position: relative;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      background: rgba(15, 15, 26, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      z-index: 999;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      padding: 0 24px;
    }
    .nav-logo {
      font-size: 28px;
      font-weight: 700;
      color: var(--accent-gold);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 1px;
    }
    .nav-logo i {
      font-size: 30px;
      color: var(--highlight-cyan);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
      transition: color var(--transition);
    }
    .nav-links a:hover {
      color: var(--accent-gold);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .status-badge {
      background: rgba(0, 229, 204, 0.12);
      color: var(--highlight-cyan);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--highlight-cyan);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--highlight-cyan);
    }
    .btn-primary {
      background: var(--accent-gold);
      color: #1E0A3C;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      border: none;
      transition: all var(--transition);
      box-shadow: 0 4px 12px rgba(245,182,66,0.3);
    }
    .btn-primary:hover {
      background: #FFCE5A;
      box-shadow: 0 6px 18px rgba(245,182,66,0.5);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: white;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      position: relative;
      margin-top: 70px;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(30,10,60,0.85) 0%, rgba(11,29,58,0.7) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      width: 100%;
    }
    .hero-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
    }
    .hero-left {
      flex: 1 1 500px;
    }
    .hero-sub {
      font-size: 20px;
      color: #E0E0F0;
      margin: 20px 0 30px;
      font-weight: 400;
    }
    .hero-data-board {
      display: flex;
      gap: 24px;
      margin: 40px 0 30px;
      flex-wrap: wrap;
    }
    .data-card {
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(5px);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 18px 22px;
      text-align: center;
      min-width: 130px;
    }
    .data-number {
      font-size: 34px;
      font-weight: 700;
      color: var(--highlight-cyan);
      display: block;
    }
    .data-label {
      font-size: 14px;
      color: var(--text-secondary);
      margin-top: 6px;
    }
    .hero-cta {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--accent-gold);
      color: #1E0A3C;
    }
    /* 通用卡片 */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 28px;
      backdrop-filter: blur(4px);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-6px);
      border-color: var(--border-hover);
      box-shadow: var(--shadow-hover);
    }
    .icon-box {
      width: 64px;
      height: 64px;
      background: rgba(255,255,255,0.06);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      overflow: hidden;
    }
    .badge {
      background: rgba(245,182,66,0.15);
      color: var(--accent-gold);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
      margin-top: 12px;
    }
    /* 网格布局 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    /* 对比区 */
    .compare-wrapper {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }
    .compare-col {
      flex: 1;
      background: rgba(255,255,255,0.03);
      border-radius: 24px;
      padding: 32px;
      border: 1px solid var(--border-light);
    }
    .progress-item {
      margin: 20px 0;
    }
    .progress-bar {
      height: 10px;
      background: rgba(255,255,255,0.1);
      border-radius: 10px;
      overflow: hidden;
      margin-top: 10px;
    }
    .progress-fill {
      height: 100%;
      background: var(--highlight-cyan);
      border-radius: 10px;
      width: 0%;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 18px 0;
      cursor: pointer;
    }
    .faq-question {
      font-size: 20px;
      font-weight: 600;
      color: white;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    /* 表单 */
    .contact-form input, .contact-form textarea {
      width: 100%;
      background: #1A1A2E;
      border: 1px solid var(--border-light);
      border-radius: 10px;
      padding: 14px;
      color: white;
      margin-bottom: 16px;
      outline: none;
      transition: border var(--transition);
    }
    .contact-form input:focus, .contact-form textarea:focus {
      border-color: var(--highlight-cyan);
    }
    .footer {
      background: #0A0A16;
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    @media (max-width: 1024px) {
      .grid-3, .grid-2x3 { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .nav-links { display: none; }
      .hamburger { display: block; }
      .grid-3, .grid-2x3 { grid-template-columns: 1fr; }
      .hero-data-board { justify-content: center; }
      .compare-wrapper { flex-direction: column; }
      .nav-cta .status-badge { display: none; }
    }