/* roulang page: index */
:root {
      --deep-purple: #2D1B3D;
      --deep-purple-soft: #3E2A50;
      --champagne-gold: #D4AF37;
      --champagne-light: #E5C865;
      --dark-emerald: #0B4D3F;
      --bg-light: #FAFAFA;
      --white: #FFFFFF;
      --gray-soft: #F5F5F5;
      --gray-border: #E8E8E8;
      --text-primary: #1E1E1E;
      --text-secondary: #5A5A5A;
      --text-light: #F0F0F0;
      --shadow-xs: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 32px rgba(45,27,61,0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: 0.3s ease;
      --container-max: 1280px;
      --font-serif: 'Noto Serif SC', 'ZCOOL XiaoWei', serif;
      --font-sans: 'Inter', 'PingFang SC', sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      transition: var(--transition);
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(45, 27, 61, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.3);
      padding: 0 20px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      height: 70px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 700;
      color: var(--champagne-gold);
      letter-spacing: 1px;
    }
    .logo i {
      font-size: 26px;
      color: var(--champagne-gold);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      color: #E0D7E8;
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding: 6px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--champagne-gold);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--champagne-gold);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .search-icon {
      color: #E0D7E8;
      font-size: 18px;
      cursor: pointer;
      transition: var(--transition);
    }
    .search-icon:hover {
      color: var(--champagne-gold);
    }
    .btn-login {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 14px;
    }
    .btn-login:hover {
      background: rgba(212, 175, 55, 0.15);
    }
    .btn-primary {
      background: var(--champagne-gold);
      color: var(--deep-purple);
      border: none;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 15px;
      box-shadow: 0 4px 14px rgba(212, 175, 55, 0.3);
      animation: breathe 2.5s infinite ease-in-out;
    }
    @keyframes breathe {
      0% { box-shadow: 0 4px 14px rgba(212, 175, 55, 0.3); }
      50% { box-shadow: 0 8px 22px rgba(212, 175, 55, 0.6); }
      100% { box-shadow: 0 4px 14px rgba(212, 175, 55, 0.3); }
    }
    .btn-primary:hover {
      background: #E5C865;
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--champagne-gold);
      cursor: pointer;
    }
    /* Hero */
    .hero {
      height: 100vh;
      background: linear-gradient(135deg, rgba(45,27,61,0.85) 0%, rgba(20,10,30,0.95) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 800px;
      padding: 0 24px;
    }
    .hero h1 {
      font-family: var(--font-serif);
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--champagne-gold);
      margin-bottom: 20px;
      letter-spacing: 2px;
      line-height: 1.3;
    }
    .hero p {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.85);
      margin-bottom: 36px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-outline-light {
      background: transparent;
      border: 1px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 12px 28px;
      border-radius: 30px;
      font-weight: 600;
    }
    .btn-outline-light:hover {
      background: rgba(212,175,55,0.2);
    }
    .scroll-down {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 28px;
      color: var(--champagne-gold);
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(10px); }
    }
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-family: var(--font-serif);
      font-size: 2.25rem;
      color: var(--deep-purple);
      text-align: center;
      margin-bottom: 16px;
    }
    .section-subtitle {
      text-align: center;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto 60px;
      font-size: 1.1rem;
    }
    /* 核心优势 非对称网格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .adv-card {
      background: var(--white);
      padding: 32px 28px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-xs);
      border-bottom: 3px solid transparent;
      transition: all 0.3s ease;
      border: 1px solid var(--gray-border);
    }
    .adv-card:hover {
      border-bottom-color: var(--champagne-gold);
      box-shadow: var(--shadow-lg);
      transform: translateY(-6px);
    }
    .adv-card.featured {
      grid-column: span 2;
      display: flex;
      align-items: center;
      gap: 40px;
      padding: 40px;
    }
    .adv-icon {
      font-size: 44px;
      color: var(--champagne-gold);
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-family: var(--font-serif);
      font-size: 1.5rem;
      margin-bottom: 12px;
      color: var(--deep-purple);
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--gray-soft);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      transition: var(--transition);
      border: 1px solid var(--gray-border);
    }
    .service-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .service-img {
      width: 45%;
      background-size: cover;
      background-position: center;
      min-height: 200px;
    }
    .service-text {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .service-text h3 {
      font-family: var(--font-serif);
      color: var(--deep-purple);
    }
    .text-link {
      color: var(--deep-purple);
      font-weight: 600;
      margin-top: 12px;
      display: inline-block;
    }
    .text-link i {
      margin-left: 6px;
      transition: var(--transition);
    }
    .text-link:hover {
      color: var(--dark-emerald);
    }
    /* 流程 */
    .process-timeline {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
      max-width: 1000px;
      margin: 0 auto;
    }
    .process-step {
      text-align: center;
      flex: 1;
      position: relative;
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 700;
      color: rgba(45,27,61,0.2);
      font-family: var(--font-serif);
    }
    .step-icon {
      font-size: 32px;
      color: var(--champagne-gold);
      margin: 12px 0;
    }
    /* 案例 */
    .cases-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 24px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-xs);
    }
    .stats-highlight {
      display: flex;
      justify-content: space-around;
      background: #F9F7FC;
      padding: 30px;
      border-radius: var(--radius-md);
      margin-top: 30px;
    }
    .stat-item {
      font-size: 2rem;
      font-weight: 700;
      color: var(--dark-emerald);
    }
    /* FAQ */
    .faq-item {
      background: white;
      border: 1px solid var(--gray-border);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      padding: 18px 24px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-item:hover {
      background: #F5F0FA;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 120px;
      margin-top: 12px;
    }
    /* CTA */
    .cta-section {
      background: var(--deep-purple);
      background-image: radial-gradient(circle at 30% 30%, rgba(212,175,55,0.15) 0%, transparent 60%);
      text-align: center;
      padding: 90px 0;
    }
    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 60px 0 40px;
    }
    .copyright {
      border-top: 1px solid #E8E8E8;
      padding: 20px 0;
      text-align: center;
      color: #6B6B6B;
    }
    @media (max-width: 1024px) {
      .advantages-grid { grid-template-columns: 1fr; }
      .adv-card.featured { grid-column: span 1; flex-direction: column; }
      .services-grid { grid-template-columns: 1fr; }
      .process-timeline { flex-direction: column; gap: 30px; }
      .cases-layout { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-login, .nav-actions .btn-primary {
        display: none;
      }
      .hamburger { display: block; }
      .hero h1 { font-size: 2.5rem; }
      .footer-grid { grid-template-columns: 1fr; }
    }