/* roulang page: index */
:root {
      --primary-deep: #0A0F1D;
      --accent-gold: #C5A86B;
      --accent-gold-hover: #B3924E;
      --deep-blue: #1E3A5F;
      --warm-white: #F4F4F0;
      --soft-gray: #EAE6DD;
      --text-light: #F4F4F0;
      --text-dark: #1A1A1A;
      --text-muted: #6B7280;
      --radius-card: 12px;
      --radius-button: 30px;
      --shadow-card: 0 8px 30px rgba(0,0,0,0.08);
      --shadow-hover: 0 16px 40px rgba(0,0,0,0.15);
      --spacing-section: 100px;
      --max-width: 1280px;
      --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --nav-blur: rgba(10,15,29,0.92);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--primary-deep);
      color: var(--text-light);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }

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

    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--nav-blur);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 1000;
      border-bottom: 1px solid rgba(197,168,107,0.1);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 1px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 2.5rem;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--warm-white);
      position: relative;
      padding: 4px 0;
    }
    .nav-links a:hover {
      color: var(--accent-gold);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
    }
    .mobile-toggle span {
      width: 26px;
      height: 2px;
      background: var(--warm-white);
      border-radius: 2px;
    }

    /* 按钮 */
    .btn-gold {
      display: inline-block;
      background: var(--accent-gold);
      color: #0A0F1D;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-button);
      font-size: 1rem;
      letter-spacing: 0.5px;
      transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 14px rgba(197,168,107,0.3);
      text-align: center;
    }
    .btn-gold:hover {
      background: var(--accent-gold-hover);
      transform: scale(1.03);
      box-shadow: 0 8px 22px rgba(197,168,107,0.5);
    }

    /* 板块通用 */
    section {
      padding: var(--spacing-section) 0;
    }

    h2 {
      font-size: 2.25rem;
      font-weight: 600;
      margin-bottom: 1rem;
      color: var(--text-light);
      letter-spacing: 1px;
    }
    h3 {
      font-size: 1.375rem;
      font-weight: 600;
      color: var(--text-light);
    }

    /* Hero/Dashboard */
    .hero {
      padding-top: 140px;
      padding-bottom: 100px;
      background: var(--primary-deep);
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.3;
      color: white;
      margin-bottom: 1.5rem;
    }
    .hero-left .sub {
      font-size: 1.15rem;
      color: #CCCCCC;
      margin-bottom: 2rem;
    }
    .stats-grid {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }
    .stat-item {
      background: rgba(30,58,95,0.7);
      backdrop-filter: blur(8px);
      padding: 20px;
      border-radius: var(--radius-card);
      border-left: 4px solid var(--accent-gold);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-gold);
    }
    .stat-label {
      color: #ccc;
      font-size: 0.9rem;
    }

    /* 服务矩阵 */
    #services {
      background: var(--warm-white);
      color: var(--text-dark);
    }
    #services h2 {
      color: var(--primary-deep);
      text-align: center;
      margin-bottom: 3rem;
    }
    .service-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 4rem;
    }
    .service-row.reverse {
      flex-direction: row-reverse;
    }
    .service-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .service-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .service-text {
      flex: 1;
    }
    .service-text h3 {
      color: var(--primary-deep);
      margin-bottom: 0.8rem;
    }
    .service-text p {
      color: #4B5563;
      margin-bottom: 1rem;
    }
    .gold-link {
      color: var(--accent-gold-hover);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 对比区 */
    #compare {
      background: #0E1320;
    }
    .compare-container {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .compare-card {
      flex: 1;
      background: var(--warm-white);
      color: #333;
      padding: 2rem;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    .compare-card.winner {
      background: var(--deep-blue);
      color: white;
      border: 2px solid var(--accent-gold);
    }
    .vs-badge {
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--accent-gold);
    }
    .compare-list {
      list-style: none;
      margin-top: 1rem;
    }
    .compare-list li {
      margin-bottom: 0.8rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    /* FAQ */
    #faq {
      background: var(--warm-white);
      color: #1F2937;
    }
    .faq-item {
      background: white;
      border: 1px solid var(--soft-gray);
      border-radius: var(--radius-card);
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .faq-question {
      padding: 1.2rem 1.8rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 1.8rem 1.5rem;
      color: #4B5563;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单 */
    #contact {
      background: var(--primary-deep);
    }
    .form-card {
      max-width: 520px;
      margin: 0 auto;
    }
    .input-line {
      background: transparent;
      border: none;
      border-bottom: 2px solid var(--accent-gold);
      padding: 12px 0;
      width: 100%;
      color: white;
      font-size: 1rem;
      margin-bottom: 1.8rem;
      outline: none;
    }
    .input-line:focus {
      border-bottom-width: 3px;
    }

    /* Footer */
    footer {
      background: #05080F;
      padding: 3rem 0;
      color: #888;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 2rem;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: flex;
      }
      .hero-content {
        grid-template-columns: 1fr;
      }
      .compare-container {
        flex-direction: column;
      }
      .service-row, .service-row.reverse {
        flex-direction: column;
      }
      h1 { font-size: 2rem; }
      h2 { font-size: 1.8rem; }
    }