/* roulang page: index */
:root {
      --primary-deep: #0B0E14;
      --accent-gold: #C5A44E;
      --accent-red: #E63946;
      --bg-warm: #F5F3EE;
      --card-white: #FFFFFF;
      --card-dark: #141820;
      --text-main: #0B0E14;
      --text-body: #2C303A;
      --text-muted: #6B717F;
      --border-light: #E5E0D8;
      --success-green: #10B981;
      --danger-red: #E63946;
      --disabled: #CBD5E1;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-dark: 0 8px 30px rgba(0,0,0,0.25);
      --radius-card: 12px;
      --radius-service: 8px;
      --radius-lg: 16px;
      --radius-btn: 6px;
      --radius-capsule: 24px;
      --font-main: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-data: "Inter", "DIN Alternate", "Roboto", sans-serif;
      --max-width: 1280px;
      --nav-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-main);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input {
      font-family: inherit;
      outline: none;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: #fff;
      height: var(--nav-height);
      box-shadow: 0 1px 0 rgba(0,0,0,0.05);
      display: flex;
      align-items: center;
    }
    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-deep);
      letter-spacing: -0.3px;
    }
    .logo-icon {
      font-size: 26px;
      color: var(--accent-gold);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.2s ease;
    }
    .nav-menu a:hover {
      color: var(--primary-deep);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-capsule);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--accent-red);
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(230,57,70,0.25);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary-deep);
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: #0B0E14;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      z-index: 100;
    }
    .mobile-menu a {
      color: white;
      font-size: 20px;
      font-weight: 500;
    }
    .mobile-menu .btn-primary {
      background: var(--accent-gold);
    }
    .mobile-menu .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      color: white;
      font-size: 28px;
      background: none;
      border: none;
    }
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 600;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 48px;
    }
    .text-center {
      text-align: center;
    }
    /* Hero */
    .hero {
      background: var(--primary-deep);
      background-image: radial-gradient(circle at 30% 40%, rgba(197,164,78,0.08) 0%, transparent 60%),
                        url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 100px 0;
      color: white;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(11,14,20,0.7);
    }
    .hero .container {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 40px;
    }
    .hero-content {
      flex: 1;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      color: white;
    }
    .hero-highlight {
      color: var(--accent-gold);
    }
    .hero p {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 32px;
    }
    .hero-stats {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-number {
      font-family: var(--font-data);
      font-size: 32px;
      font-weight: 700;
      color: var(--accent-gold);
    }
    .stat-label {
      font-size: 14px;
      color: rgba(255,255,255,0.6);
    }
    .hero-image {
      flex: 1;
    }
    .hero-image img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-dark);
    }
    /* 数据看板 */
    .data-board {
      background: var(--bg-warm);
    }
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .data-card {
      background: var(--card-dark);
      color: white;
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s;
    }
    .data-card:hover {
      transform: translateY(-4px);
    }
    .data-label {
      font-size: 13px;
      color: #9ca3af;
      margin-bottom: 8px;
    }
    .data-value {
      font-family: var(--font-data);
      font-size: 40px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .data-change {
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .up { color: var(--success-green); }
    .down { color: var(--danger-red); }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-service);
      padding: 32px;
      transition: all 0.25s;
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-sm);
      border-color: var(--accent-gold);
    }
    .service-icon {
      font-size: 28px;
      color: var(--accent-gold);
      transition: color 0.2s;
    }
    .service-card:hover .service-icon {
      color: var(--accent-red);
    }
    .service-text h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    /* 对比区 */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .compare-col {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-light);
    }
    .compare-col.king {
      border-left: 6px solid var(--accent-gold);
    }
    .compare-col.other {
      opacity: 0.8;
      background: #f8f9fa;
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid #eee;
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 18px;
      color: var(--text-main);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    .faq-item.active .faq-question {
      color: var(--accent-gold);
    }
    /* CTA */
    .cta-section {
      background: var(--primary-deep);
      background-image: radial-gradient(circle at 70% 50%, rgba(197,164,78,0.1) 0%, transparent 70%);
      border-top: 4px solid var(--accent-gold);
      text-align: center;
    }
    .cta-section h2 {
      color: white;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
      flex-wrap: wrap;
    }
    .cta-input {
      padding: 14px 20px;
      border-radius: 30px;
      border: none;
      width: 280px;
    }
    /* 页脚 */
    .footer {
      background: var(--primary-deep);
      color: #9ca3af;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .footer-bottom {
      border-top: 1px solid #2d2f36;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    @media (max-width: 1024px) {
      .data-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .compare-container { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero .container { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero h1 { font-size: 36px; }
    }