/* roulang page: index */
:root {
      --deep-purple: #2D1B3D;
      --gold: #D4A843;
      --deep-gold: #B8912e;
      --gunpowder-gray: #4A4A4A;
      --warm-white: #F5F0E8;
      --alert-red: #C44536;
      --card-bg: #FFFFFF;
      --border-light: #E0D9CE;
      --shadow-glow: rgba(45, 27, 61, 0.15);
      --radius-sm: 4px;
      --transition: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--warm-white);
      color: var(--gunpowder-gray);
      line-height: 1.8;
      letter-spacing: 0.02em;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4 {
      font-family: 'Noto Serif SC', 'STSong', 'Songti SC', 'Times New Roman', serif;
      font-weight: 700;
      letter-spacing: 0.04em;
    }
    
    a {
      color: var(--gold);
      text-decoration: none;
      transition: var(--transition);
    }
    
    a:hover {
      color: var(--deep-purple);
      text-decoration: none;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, .button {
      font-family: inherit;
      font-weight: 700;
      border-radius: var(--radius-sm);
      transition: all var(--transition);
      cursor: pointer;
      display: inline-block;
      text-align: center;
      text-decoration: none;
      border: 2px solid transparent;
      letter-spacing: 0.05em;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* 左侧竖向导航布局 (桌面端) */
    .app-wrapper {
      display: flex;
      min-height: 100vh;
    }
    
    .side-nav {
      width: 240px;
      background-color: var(--deep-purple);
      color: white;
      position: fixed;
      top: 0;
      left: 0;
      height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 2rem 1.5rem;
      z-index: 40;
      box-shadow: 4px 0 20px rgba(0,0,0,0.25);
      transition: transform 0.3s ease;
    }
    
    .logo-area {
      text-align: center;
      margin-bottom: 2rem;
    }
    
    .logo-icon {
      font-size: 2.5rem;
      color: var(--gold);
      margin-bottom: 0.25rem;
    }
    
    .logo-text {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      letter-spacing: 0.1em;
      font-family: 'Noto Serif SC', serif;
    }
    
    .nav-links {
      list-style: none;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
      margin-top: 2rem;
    }
    
    .nav-links li a {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 1rem;
      padding: 0.4rem 0;
      display: block;
      border-left: 3px solid transparent;
      padding-left: 0.75rem;
      transition: all 0.2s;
    }
    
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--gold);
      border-left-color: var(--gold);
      background: rgba(255,255,255,0.05);
    }
    
    .nav-contact {
      margin-top: auto;
      font-size: 0.9rem;
      color: #ccc;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    
    .main-content {
      margin-left: 240px;
      width: calc(100% - 240px);
      flex: 1;
    }
    
    /* 移动端汉堡菜单 */
    .mobile-header {
      display: none;
      background: var(--deep-purple);
      color: white;
      padding: 1rem 1.5rem;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
    
    .mobile-logo {
      font-size: 1.3rem;
      font-weight: 700;
      color: white;
    }
    
    .hamburger {
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    
    .mobile-nav-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--deep-purple);
      z-index: 45;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 2rem;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
    }
    
    .mobile-nav-overlay.open {
      transform: translateX(0);
    }
    
    .mobile-nav-overlay a {
      color: white;
      font-size: 1.4rem;
      border-bottom: 2px solid transparent;
      padding-bottom: 0.5rem;
    }
    
    .mobile-nav-overlay a:hover {
      border-bottom-color: var(--gold);
      color: var(--gold);
    }
    
    /* 区块通用 */
    section {
      padding: 5rem 0;
      scroll-margin-top: 20px;
    }
    
    .section-title {
      font-size: 2.4rem;
      color: var(--deep-purple);
      margin-bottom: 1rem;
      position: relative;
    }
    
    .section-subtitle {
      color: var(--gunpowder-gray);
      font-size: 1.2rem;
      margin-bottom: 3rem;
    }
    
    .btn-primary {
      background: var(--gold);
      color: var(--deep-purple);
      padding: 0.9rem 2.5rem;
      font-size: 1.1rem;
      box-shadow: 0 8px 18px rgba(212,168,67,0.3);
    }
    
    .btn-primary:hover {
      background: var(--deep-purple);
      color: var(--gold);
      border-color: var(--gold);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(45,27,61,0.3);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 0.8rem 2.2rem;
    }
    
    .btn-outline:hover {
      background: var(--gold);
      color: var(--deep-purple);
      transform: translateY(-2px);
    }
    
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #2D1B3D 0%, #1a0f24 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      min-height: 100vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    
    .hero-content {
      max-width: 700px;
    }
    
    .hero h1 {
      font-size: 3.8rem;
      color: var(--gold);
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
      line-height: 1.2;
    }
    
    .hero .sub {
      font-size: 1.4rem;
      margin: 1.5rem 0 2rem;
      opacity: 0.9;
    }
    
    .trust-badge {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-top: 1.5rem;
      font-size: 0.95rem;
      color: #ddd;
    }
    
    /* 痛点对比 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 2rem;
      align-items: center;
    }
    
    .pain-card {
      background: white;
      padding: 2rem;
      border-radius: var(--radius-sm);
      box-shadow: 0 15px 30px var(--shadow-glow);
    }
    
    .pain-card.dark {
      background: #3a2a4a;
      color: #eee;
    }
    
    .vs-icon {
      font-size: 2.5rem;
      color: var(--alert-red);
      font-weight: bold;
    }
    
    /* 解决方案卡片 */
    .solution-cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 2rem;
    }
    
    .sol-card {
      background: white;
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: 0 10px 25px var(--shadow-glow);
      transition: all 0.3s;
      border-top: 4px solid var(--gold);
    }
    
    .sol-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 20px 35px rgba(45,27,61,0.2);
      border-top-width: 6px;
    }
    
    .sol-card img {
      height: 180px;
      object-fit: cover;
    }
    
    .sol-card-content {
      padding: 1.5rem;
    }
    
    /* 数据区 */
    .stats-bar {
      background: var(--deep-purple);
      color: white;
      padding: 3rem 0;
    }
    
    .stat-item {
      text-align: center;
    }
    
    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--gold);
    }
    
    /* 证言滚动 */
    .testimonial-scroll {
      display: flex;
      overflow-x: auto;
      gap: 1.5rem;
      padding-bottom: 1rem;
    }
    
    .testimonial-card {
      min-width: 300px;
      background: white;
      padding: 1.8rem;
      border-left: 4px solid var(--gold);
      box-shadow: 0 8px 20px var(--shadow-glow);
      border-radius: var(--radius-sm);
    }
    
    /* FAQ */
    .accordion-title {
      font-size: 1.1rem;
      font-weight: 600;
      border-left: 4px solid var(--gold);
      padding-left: 1rem;
    }
    
    /* Footer */
    .footer {
      background: var(--deep-purple);
      color: #ddd;
      padding: 2.5rem 0 1.5rem;
    }
    
    @media (max-width: 1024px) {
      .side-nav {
        display: none;
      }
      .mobile-header {
        display: flex;
      }
      .main-content {
        margin-left: 0;
        width: 100%;
        padding-top: 70px;
      }
      .hero h1 {
        font-size: 2.8rem;
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .vs-icon {
        text-align: center;
      }
    }