/* roulang page: index */
:root {
      --primary-charcoal: #1A1A1A;
      --accent-gold: #C8A96E;
      --deep-gold: #B8944A;
      --bg-warm: #FAF8F5;
      --deep-green: #2D4A3E;
      --text-primary: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-muted: #7A7A7A;
      --white: #FFFFFF;
      --border-light: #E8E5E0;
      --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-sans: 'Noto Sans SC', sans-serif;
      --font-number: 'Inter', sans-serif;
      --font-logo: 'Poppins', sans-serif;
      --max-width: 1280px;
      --nav-height: 72px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 3rem;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.25rem;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.5rem;
      margin-bottom: 0.75rem;
    }

    h4 {
      font-size: 1.1rem;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.25s ease;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid transparent;
      transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
      display: flex;
      align-items: center;
    }

    .navbar.scrolled {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 2px 20px rgba(0,0,0,0.04);
      border-bottom: 1px solid var(--border-light);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    .logo {
      font-family: var(--font-logo);
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: -0.5px;
      color: var(--primary-charcoal);
      display: flex;
      align-items: baseline;
      gap: 2px;
    }
    .logo .j9 {
      color: var(--accent-gold);
      font-weight: 700;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 36px;
      list-style: none;
    }

    .nav-menu a {
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 4px 0;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary-charcoal);
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      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%;
    }

    .btn-primary {
      background: var(--accent-gold);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 10px rgba(200,169,110,0.3);
    }
    .btn-primary:hover {
      background: var(--deep-gold);
      box-shadow: 0 6px 16px rgba(184,148,74,0.4);
      transform: translateY(-1px);
    }

    .btn-outline {
      border: 1.5px solid var(--primary-charcoal);
      color: var(--primary-charcoal);
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--accent-gold);
      border-color: var(--accent-gold);
      color: white;
    }

    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--primary-charcoal);
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      gap: 60px;
      background: linear-gradient(135deg, #FAF8F5 0%, #F4EFE6 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-content {
      flex: 1 1 50%;
    }
    .hero-content h1 {
      margin-bottom: 1.2rem;
      color: var(--primary-charcoal);
    }
    .hero-content p {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2.2rem;
      max-width: 480px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-visual {
      flex: 1 1 45%;
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      min-height: 340px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
      display: flex;
      align-items: flex-end;
      justify-content: flex-end;
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(200,169,110,0.15), transparent 70%);
    }
    .floating-shape {
      position: absolute;
      width: 160px;
      height: 160px;
      border: 2px solid rgba(200,169,110,0.3);
      border-radius: 50%;
      top: 30px;
      right: 30px;
      animation: float 6s infinite ease-in-out;
    }
    @keyframes float {
      0% { transform: translateY(0px) rotate(0deg); }
      50% { transform: translateY(-15px) rotate(5deg); }
      100% { transform: translateY(0px) rotate(0deg); }
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }
    .section-title h2 {
      margin-bottom: 0.6rem;
    }
    .section-title p {
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }

    /* 关于 */
    .about-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .about-text {
      flex: 1;
    }
    .about-image {
      flex: 1;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border-radius: var(--radius-md);
      height: 360px;
      box-shadow: var(--shadow-card);
    }

    /* 服务卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 0 0 28px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      overflow: hidden;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .card-content {
      padding: 20px 24px 0;
    }
    .card-content i {
      color: var(--accent-gold);
      font-size: 1.8rem;
      margin-bottom: 12px;
    }

    /* 优势数据 */
    .stats-row {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 24px;
    }
    .stat-item {
      flex: 1;
      min-width: 160px;
    }
    .stat-number {
      font-family: var(--font-number);
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--deep-green);
      line-height: 1.2;
    }

    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }
    .step {
      flex: 1;
      background: var(--white);
      padding: 28px 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      text-align: center;
    }
    .step-number {
      font-family: var(--font-number);
      font-size: 2.4rem;
      color: var(--accent-gold);
      font-weight: 700;
    }

    /* 案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .case-card {
      background: var(--white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      cursor: pointer;
      color: var(--primary-charcoal);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
      padding-left: 20px;
      border-left: 2px solid var(--accent-gold);
      margin-top: 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }

    /* CTA */
    .cta-band {
      background: var(--deep-green);
      text-align: center;
      padding: 80px 0;
      color: white;
    }

    /* 页脚 */
    .footer {
      background: var(--primary-charcoal);
      color: #CCC;
      padding: 50px 0 20px;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      h2 { font-size: 1.8rem; }
      .container { padding: 0 20px; }
      .nav-menu { display: none; }
      .hamburger { display: block; }
      .hero { flex-direction: column; padding: 100px 0 60px; }
      .cards-grid { grid-template-columns: 1fr; }
      .about-grid { flex-direction: column; }
      .cases-grid { grid-template-columns: 1fr 1fr; }
    }