/* roulang page: index */
:root {
      --primary-deep: #1A1A2E;
      --accent-gold: #C9A84C;
      --bg-warm: #F8F6F0;
      --accent-red: #D43D3D;
      --text-main: #1E1E1E;
      --text-muted: #5A5A5A;
      --white: #FFFFFF;
      --border-soft: #E8E4DA;
      --shadow-card: 0 4px 20px rgba(26, 26, 46, 0.06);
      --shadow-hover: 0 8px 32px rgba(26, 26, 46, 0.12);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-btn: 50px;
      --font-title: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --font-number: 'DIN', 'PingFang SC', 'Microsoft YaHei', system-ui, monospace;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.75;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

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

    button, input, textarea {
      font-family: inherit;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.02);
      z-index: 1000;
      border-bottom: 1px solid rgba(200, 190, 170, 0.2);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-deep);
      letter-spacing: -0.02em;
      white-space: nowrap;
    }

    .logo-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(145deg, #C9A84C, #B8922E);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 24px;
      box-shadow: 0 6px 14px rgba(201,168,76,0.35);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2.2rem;
      font-weight: 500;
      color: var(--primary-deep);
    }

    .nav-menu a {
      position: relative;
      padding: 8px 0;
      font-size: 0.95rem;
      letter-spacing: 0.02em;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .hamburger span {
      display: block;
      width: 26px;
      height: 2px;
      background: var(--primary-deep);
      border-radius: 4px;
      transition: 0.3s;
    }

    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 20, 0.92);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.8rem;
        transform: translateY(-150%);
        transition: transform 0.4s ease;
        color: white;
        border-radius: 0 0 24px 24px;
      }
      .nav-menu.open {
        transform: translateY(0);
      }
      .nav-menu a {
        color: white;
        font-size: 1.2rem;
      }
      .hamburger {
        display: flex;
      }
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 1024px) {
      section {
        padding: 70px 0;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 56px 0;
      }
    }

    .section-title {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 2.2rem;
      letter-spacing: -0.02em;
      color: var(--primary-deep);
      margin-bottom: 1rem;
      text-align: center;
    }

    .section-sub {
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 3rem;
      font-size: 1.1rem;
    }

    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
      position: relative;
      overflow: hidden;
      padding-top: 80px;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      color: white;
    }

    .badge-gold {
      display: inline-flex;
      align-items: center;
      background: rgba(201,168,76,0.18);
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 6px 18px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.08em;
      margin-bottom: 1.5rem;
    }

    .hero h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.2rem;
      color: white;
    }

    .hero p {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2.2rem;
    }

    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent-gold);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: all 0.25s;
      box-shadow: 0 8px 18px rgba(201,168,76,0.3);
    }

    .btn-primary:hover {
      background: #D4B65A;
      box-shadow: 0 0 20px rgba(201,168,76,0.5);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: 0.25s;
    }

    .btn-outline:hover {
      background: rgba(201,168,76,0.12);
    }

    .floating-stat {
      position: absolute;
      right: 5%;
      bottom: 15%;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      padding: 1rem 1.8rem;
      border-radius: 20px;
      color: white;
      border: 1px solid rgba(255,255,255,0.2);
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.4rem;
      }
      .floating-stat {
        position: static;
        margin-top: 1.5rem;
        width: fit-content;
      }
    }

    /* 数据看板 */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-item {
      background: var(--white);
      padding: 2rem 1rem;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    .stat-label {
      color: var(--text-muted);
      margin-top: 0.4rem;
    }

    @media (max-width: 768px) {
      .data-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-soft);
      transition: all 0.25s;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(201,168,76,0.08);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      color: var(--accent-gold);
      font-size: 2rem;
    }

    .service-card h3 {
      margin-bottom: 0.5rem;
    }

    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 对比 */
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .compare-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 2rem;
      border: 1px solid var(--border-soft);
    }

    .compare-card.recommended {
      border: 2px solid var(--accent-gold);
      position: relative;
    }

    .badge-recommend {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--accent-red);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
    }

    @media (max-width: 768px) {
      .comparison-row {
        grid-template-columns: 1fr;
      }
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .faq-item {
      background: var(--bg-warm);
      border-radius: var(--radius-md);
      padding: 0 16px;
      margin-bottom: 12px;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
      font-weight: 600;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-muted);
    }

    .faq-item.open .faq-answer {
      max-height: 160px;
      padding-bottom: 16px;
    }

    @media (max-width: 768px) {
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    /* CTA */
    .cta-section {
      background: var(--primary-deep);
      color: white;
    }

    .cta-form {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: center;
      margin-top: 2rem;
    }

    .cta-form input {
      padding: 14px 18px;
      border-radius: 8px;
      border: 1px solid var(--border-soft);
      background: white;
      min-width: 200px;
    }

    .btn-submit {
      background: var(--accent-red);
      color: white;
      border: none;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      cursor: pointer;
    }

    .footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.7);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
        align-items: stretch;
      }
    }