/* roulang page: index */
:root {
      --bg-limestone: #F9F6F0;
      --bg-basalt: #1A1714;
      --primary-lapis: #1B2A4A;
      --accent-gold: #C9A96E;
      --terracotta: #C4735A;
      --text-primary: #2B2B2B;
      --text-secondary: rgba(27, 42, 74, 0.7);
      --card-bg: #FFFFFF;
      --shadow-sm: 0 8px 30px rgba(27, 42, 74, 0.05);
      --shadow-hover: 0 16px 48px rgba(27, 42, 74, 0.1);
      --radius-card: 20px;
      --radius-pill: 50px;
      --font-serif: 'Noto Serif SC', 'Cormorant Garamond', serif;
      --font-sans: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      --section-gap: 5rem;
      --container-max: 1280px;
      --nav-height: 80px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-limestone);
      color: var(--text-primary);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      transition: background 0.2s;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 2rem;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 600;
      letter-spacing: -0.3px;
    }

    h1 {
      font-size: clamp(2.8rem, 6vw, 3.8rem);
      line-height: 1.2;
      color: var(--accent-gold);
    }

    h2 {
      font-size: clamp(2rem, 4.5vw, 2.8rem);
      color: var(--primary-lapis);
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.7rem;
      color: var(--primary-lapis);
    }

    p {
      color: var(--text-secondary);
      font-size: 1.125rem;
      line-height: 1.9;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      transition: all 0.25s ease;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      z-index: 50;
      backdrop-filter: blur(0px);
      background: transparent;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
    }

    .nav.scrolled {
      background: rgba(249, 246, 240, 0.85);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 2rem;
    }

    .logo {
      font-family: var(--font-serif);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 3px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      gap: 2.8rem;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.85rem;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: rgba(26, 23, 20, 0.75);
      font-weight: 500;
      position: relative;
      padding-bottom: 4px;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 1.5px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }

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

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

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

    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(249, 246, 240, 0.8);
      backdrop-filter: blur(20px);
      border-top: 1px solid rgba(201, 169, 110, 0.15);
      padding: 0.6rem 1rem;
      justify-content: space-around;
      z-index: 55;
      border-radius: 24px 24px 0 0;
    }

    .mobile-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      color: var(--text-secondary);
      gap: 4px;
      font-weight: 500;
      letter-spacing: 0.8px;
    }

    .mobile-nav a.active {
      color: var(--primary-lapis);
    }

    .mobile-nav i {
      font-size: 1.2rem;
      position: relative;
    }

    .active-dot {
      display: none;
      width: 4px;
      height: 4px;
      background: var(--primary-lapis);
      border-radius: 50%;
      position: absolute;
      top: -6px;
      right: -8px;
    }

    .mobile-nav a.active .active-dot {
      display: block;
    }

    /* 板块间距 */
    section {
      padding: 5rem 0;
      scroll-margin-top: var(--nav-height);
    }

    .hero-section {
      padding: 0;
      height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #1A1714 0%, #1B2A4A 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-pattern {
      position: absolute;
      inset: 0;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 100" opacity="0.07"><path d="M20 20 L30 10 L40 20 L30 30 Z" fill="none" stroke="%23C9A96E" stroke-width="0.8"/><text x="60" y="65" font-size="12" fill="%23C9A96E" font-family="serif">𒀭</text></svg>');
      background-size: 180px;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 800px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    .hero-sub {
      font-size: 1.3rem;
      color: rgba(249, 246, 240, 0.8);
      margin: 1.5rem 0 2.5rem;
      font-family: var(--font-serif);
      letter-spacing: 1px;
    }

    .btn-gold {
      background: var(--accent-gold);
      color: var(--primary-lapis);
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      letter-spacing: 2px;
      font-size: 0.9rem;
      box-shadow: 0 10px 20px rgba(201,169,110,0.2);
    }

    .btn-gold:hover {
      background: #dbb978;
      transform: translateY(-2px);
    }

    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-pill);
      font-weight: 500;
      letter-spacing: 2px;
      margin-left: 1.2rem;
    }

    .btn-outline-gold:hover {
      background: rgba(201,169,110,0.1);
    }

    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .stat-card {
      background: var(--bg-limestone);
      border: 1px solid rgba(201,169,110,0.25);
      border-radius: 12px;
      padding: 2.5rem 2rem;
      text-align: center;
    }

    .stat-number {
      font-family: var(--font-serif);
      font-size: 3.2rem;
      color: var(--terracotta);
      font-weight: 700;
    }

    .stat-label {
      font-size: 0.9rem;
      letter-spacing: 2px;
      color: var(--primary-lapis);
      margin-top: 0.8rem;
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .service-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }

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

    .service-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .img-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(27,42,74,0.2) 0%, rgba(27,42,74,0.7) 100%);
    }

    .service-body {
      padding: 2rem;
    }

    .service-body h3 {
      margin-bottom: 0.6rem;
    }

    .text-link {
      color: var(--accent-gold);
      font-weight: 500;
      margin-top: 1.2rem;
      display: inline-block;
      border-bottom: 1px solid transparent;
    }

    .text-link:hover {
      border-bottom: 1px solid var(--accent-gold);
    }

    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1px 1fr;
      gap: 2.5rem;
      align-items: start;
    }

    .divider {
      background: rgba(201,169,110,0.4);
      width: 1px;
      height: 100%;
    }

    .comp-col h4 {
      font-size: 1.8rem;
      margin-bottom: 1.8rem;
    }

    .comp-item {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1.3rem;
      font-size: 1.1rem;
    }

    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid rgba(201,169,110,0.2);
      padding: 1.5rem 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      align-items: center;
      gap: 1rem;
      font-family: var(--font-serif);
      font-size: 1.2rem;
      color: var(--primary-lapis);
    }

    .faq-icon {
      width: 8px;
      height: 8px;
      background: var(--accent-gold);
      transform: rotate(45deg);
      opacity: 0.5;
    }

    .faq-answer {
      margin-top: 1rem;
      padding-left: 1.8rem;
      display: none;
      color: var(--text-secondary);
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .contact-band {
      background: var(--primary-lapis);
      padding: 4rem 0;
    }

    .contact-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 3.5rem;
      display: flex;
      gap: 3rem;
      max-width: 900px;
      margin: 0 auto;
    }

    .input-line {
      background: transparent;
      border: none;
      border-bottom: 1.5px solid #ddd;
      padding: 0.9rem 0.2rem;
      font-size: 1rem;
      width: 100%;
      margin-bottom: 1.8rem;
      outline: none;
      transition: border 0.2s;
    }

    .input-line:focus {
      border-bottom: 2px solid var(--accent-gold);
    }

    .footer {
      text-align: center;
      padding: 2.5rem 0;
      background: var(--bg-limestone);
    }

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

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-nav {
        display: flex;
      }
      section {
        padding: 3.5rem 0;
      }
      .dashboard-grid,
      .services-grid {
        grid-template-columns: 1fr;
      }
      .comparison-wrapper {
        grid-template-columns: 1fr;
      }
      .divider {
        display: none;
      }
      .contact-card {
        flex-direction: column;
        padding: 2rem;
      }
      .btn-outline-gold {
        margin-left: 0;
        margin-top: 1rem;
      }
      .hero-content {
        padding: 0 1rem;
      }
    }