/* roulang page: index */
:root {
      --gold: #C8A96E;
      --gold-hover: #B8934F;
      --deep-wood: #2C241B;
      --champagne: #F7F3ED;
      --burgundy: #7A2E3B;
      --warm-gray: #5C5348;
      --dark-footer: #1E1812;
      --border-gold: rgba(200,169,110,0.25);
      --shadow-gold: rgba(200,169,110,0.15);
      --shadow-gold-deep: rgba(200,169,110,0.25);
      --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
      --radius: 4px;
      --transition: 0.3s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: #fff;
      color: var(--deep-wood);
      line-height: 1.8;
      font-weight: 300;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

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

    /* 排版 */
    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 1rem;
    }

    h2 {
      font-size: 2.2rem;
      margin-bottom: 2rem;
      display: inline-block;
      position: relative;
      letter-spacing: 0.02em;
    }

    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 2px;
      background-color: var(--gold);
    }

    .text-center h2::after {
      left: 50%;
      transform: translateX(-50%);
    }

    .section {
      padding: 100px 0;
    }

    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(44,36,27,0.92);
      backdrop-filter: blur(12px);
      z-index: 50;
      height: 72px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--border-gold);
      padding: 0 2rem;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1300px;
      margin: 0 auto;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .brand {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.7rem;
      color: var(--gold);
      letter-spacing: 0.12em;
    }

    .logo-divider {
      width: 1px;
      height: 28px;
      background-color: var(--gold);
      opacity: 0.5;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }

    .nav-links a {
      color: var(--champagne);
      font-weight: 400;
      font-size: 0.95rem;
      letter-spacing: 0.05em;
      transition: color var(--transition);
    }

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

    .mega-trigger {
      background: none;
      border: 1px solid var(--gold);
      color: var(--gold);
      padding: 8px 18px;
      border-radius: var(--radius);
      cursor: pointer;
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: all var(--transition);
      font-family: var(--font-sans);
    }

    .mega-trigger:hover {
      background: var(--gold);
      color: var(--deep-wood);
    }

    .mega-panel {
      position: absolute;
      top: 72px;
      right: 2rem;
      background: var(--deep-wood);
      border: 1px solid var(--border-gold);
      border-radius: var(--radius);
      padding: 2rem;
      width: 480px;
      display: flex;
      gap: 2rem;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: all 0.25s ease-out;
      pointer-events: none;
      z-index: 55;
      box-shadow: 0 20px 30px rgba(0,0,0,0.4);
    }

    .mega-trigger:hover + .mega-panel,
    .mega-panel:hover {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
      pointer-events: auto;
    }

    .mega-col {
      flex: 1;
    }

    .mega-col h4 {
      color: var(--gold);
      margin-bottom: 1rem;
      font-size: 0.9rem;
      letter-spacing: 0.08em;
    }

    .mega-col a {
      display: block;
      color: var(--champagne);
      margin-bottom: 0.75rem;
      font-size: 0.9rem;
      transition: color var(--transition);
    }

    .mega-col a:hover {
      color: var(--gold);
    }

    .mega-card {
      background: rgba(200,169,110,0.1);
      padding: 1rem;
      border-radius: var(--radius);
      text-align: center;
      color: var(--gold);
      font-weight: 600;
      border: 1px solid var(--border-gold);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--gold);
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      padding-top: 120px;
      background: var(--champagne);
      display: flex;
      align-items: center;
      min-height: 90vh;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }

    .hero-left {
      flex: 5;
    }

    .hero-right {
      flex: 4;
      position: relative;
    }

    .hero-tag {
      color: var(--gold);
      font-weight: 400;
      font-size: 0.9rem;
      letter-spacing: 0.1em;
      margin-bottom: 1rem;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      color: var(--deep-wood);
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }

    .hero-desc {
      color: var(--warm-gray);
      font-size: 1.1rem;
      max-width: 450px;
      margin-bottom: 2rem;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--gold);
      color: var(--deep-wood);
      padding: 14px 36px;
      border-radius: var(--radius);
      font-weight: 600;
      display: inline-block;
      transition: all var(--transition);
      border: none;
      cursor: pointer;
      letter-spacing: 0.05em;
    }

    .btn-primary:hover {
      background: var(--gold-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px var(--shadow-gold);
    }

    .btn-outline {
      border: 1.5px solid var(--gold);
      color: var(--gold);
      padding: 14px 36px;
      border-radius: var(--radius);
      font-weight: 600;
      background: transparent;
      transition: all var(--transition);
    }

    .btn-outline:hover {
      background: var(--gold);
      color: var(--deep-wood);
    }

    .hero-img {
      width: 100%;
      height: 500px;
      object-fit: cover;
      border-radius: 0;
    }

    .stats-overlay {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(44,36,27,0.8);
      backdrop-filter: blur(8px);
      padding: 1rem 1.5rem;
      display: flex;
      gap: 2rem;
      border-radius: var(--radius);
      color: var(--champagne);
    }

    .stat-item h3 {
      font-family: var(--font-serif);
      color: var(--gold);
      font-size: 2rem;
      margin-bottom: 0;
    }

    /* Highlights */
    .highlights {
      background: var(--deep-wood);
      color: var(--champagne);
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }

    .highlight-box {
      border-right: 1px solid var(--border-gold);
      padding: 1rem;
    }

    .highlight-box:last-child {
      border-right: none;
    }

    .big-number {
      font-family: var(--font-serif);
      font-size: 3rem;
      color: var(--gold);
      font-weight: 600;
    }

    /* Services 非对称 */
    .services {
      background: var(--champagne);
    }

    .service-grid {
      display: grid;
      grid-template-columns: 3fr 2fr;
      gap: 2rem;
    }

    .service-card {
      background: #fff;
      border: 1px solid var(--border-gold);
      border-radius: var(--radius);
      overflow: hidden;
      transition: all 0.35s ease;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px var(--shadow-gold-deep);
    }

    .service-img {
      height: 260px;
      object-fit: cover;
    }

    .service-text {
      padding: 1.5rem;
    }

    .text-link {
      color: var(--gold);
      font-weight: 500;
      border-bottom: 1px solid var(--gold);
      transition: 0.3s;
    }

    /* 方案对比 */
    .plans {
      background: #fff;
    }

    .plan-cols {
      display: flex;
      gap: 2rem;
      align-items: flex-start;
      justify-content: center;
    }

    .plan-card {
      flex: 1;
      border: 1px solid var(--border-gold);
      border-radius: var(--radius);
      overflow: hidden;
    }

    .plan-header {
      background: var(--gold);
      color: var(--deep-wood);
      padding: 1rem;
      font-weight: 700;
      text-align: center;
    }

    .plan-body {
      padding: 1.5rem;
    }

    /* 案例瀑布流 */
    .cases {
      background: var(--deep-wood);
    }

    .masonry {
      columns: 3;
      gap: 1.5rem;
    }

    .case-card {
      break-inside: avoid;
      margin-bottom: 1.5rem;
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
    }

    .case-card img {
      border-radius: var(--radius);
    }

    .case-info {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      color: white;
      padding: 1rem;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-gold);
      padding: 1rem 0;
    }

    .faq-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--warm-gray);
    }

    /* CTA */
    .cta-full {
      background: var(--deep-wood);
      position: relative;
    }

    .cta-inner {
      text-align: center;
      padding: 4rem 1rem;
    }

    .footer {
      background: var(--dark-footer);
      color: var(--champagne);
      padding: 3rem 0;
    }

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

    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; }
      .grid-4 { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: 1fr; }
      .plan-cols { flex-direction: column; }
      .masonry { columns: 2; }
    }

    @media (max-width: 640px) {
      .nav-links, .mega-trigger { display: none; }
      .hamburger { display: block; }
      .grid-4 { grid-template-columns: 1fr; }
      .masonry { columns: 1; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      h1 { font-size: 2.5rem; }
    }