/* roulang page: index */
:root {
      --deep-green: #0B3D2E;
      --warm-gold: #C8A45C;
      --bg-light: #F7F8F6;
      --text-dark: #1E1E1E;
      --text-gray: #4A4A4A;
      --white: #FFFFFF;
      --amber-orange: #E88D2A;
      --amber-hover: #C8751E;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.06);
      --card-shadow-hover: 0 8px 30px rgba(0,0,0,0.10);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --section-gap: 5rem;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-light);
      color: var(--text-dark);
      margin: 0;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      padding-top: 70px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease, background-color 0.2s ease;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      margin-top: 0;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      z-index: 100;
      border-bottom: 1px solid rgba(0,0,0,0.05);
      padding: 0.8rem 0;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--deep-green);
      letter-spacing: 1px;
      font-family: var(--font-heading);
    }
    .desktop-nav {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .desktop-nav a {
      color: var(--text-gray);
      font-weight: 500;
      font-size: 1rem;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: border-color 0.2s, color 0.2s;
    }
    .desktop-nav a:hover,
    .desktop-nav a.active {
      color: var(--warm-gold);
      border-bottom-color: var(--warm-gold);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--deep-green);
      cursor: pointer;
    }
    /* 移动端底部Tab */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #fff;
      box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
      z-index: 99;
      padding: 0.5rem 0.8rem;
      justify-content: space-around;
      align-items: center;
      border-top: 1px solid #eee;
    }
    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      color: var(--text-gray);
      font-weight: 500;
      gap: 4px;
    }
    .mobile-bottom-nav a i {
      font-size: 1.3rem;
    }
    .mobile-bottom-nav a.active {
      color: var(--warm-gold);
    }
    /* Hero */
    .hero {
      background: var(--bg-light);
      padding: 3rem 0 4rem;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-left {
      flex: 1;
    }
    .hero-right {
      flex: 1;
      position: relative;
    }
    .hero-right img {
      border-radius: 16px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.1);
      width: 100%;
      height: auto;
      object-fit: cover;
      aspect-ratio: 4/3;
    }
    .hero-right::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(11,61,46,0.08) 0%, rgba(200,164,92,0.1) 100%);
      border-radius: 16px;
      pointer-events: none;
    }
    h1 {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--deep-green);
      line-height: 1.3;
      margin-bottom: 1.2rem;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-gray);
      margin-bottom: 2rem;
    }
    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--amber-orange);
      color: white;
      border: none;
      padding: 0.8rem 2.2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--amber-hover);
      transform: scale(1.03);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--deep-green);
      color: var(--deep-green);
      padding: 0.8rem 2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: all 0.2s;
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--deep-green);
      color: white;
    }
    /* 通用板块 */
    section {
      padding: var(--section-gap) 0;
    }
    .section-title {
      text-align: center;
      font-size: 2.2rem;
      font-weight: 600;
      color: var(--deep-green);
      margin-bottom: 2.5rem;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .card {
      background: var(--white);
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      transition: transform 0.25s, box-shadow 0.25s;
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .card-img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      border-radius: var(--border-radius-card) var(--border-radius-card) 0 0;
    }
    .card-body {
      padding: 1.8rem;
    }
    .card-body h3 {
      font-size: 1.4rem;
      font-weight: 600;
      color: var(--deep-green);
      margin-bottom: 0.5rem;
    }
    .card-body p {
      color: var(--text-gray);
      margin-bottom: 1rem;
    }
    .tag {
      color: var(--warm-gold);
      font-weight: 600;
      font-size: 0.9rem;
    }
    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
    }
    .pain-card {
      background: #fff;
      padding: 2rem;
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      border-left: 5px solid var(--warm-gold);
    }
    /* 数据区 */
    .stats {
      background: var(--deep-green);
      color: white;
      padding: 3.5rem 0;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 2rem;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--warm-gold);
    }
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
    }
    .testimonial-card {
      background: #FAFAF8;
      padding: 2rem;
      border-radius: var(--border-radius-card);
    }
    .avatar-placeholder {
      width: 50px;
      height: 50px;
      background: #e0e0e0;
      border-radius: 50%;
      border: 2px solid var(--warm-gold);
      margin-bottom: 1rem;
    }
    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 10px;
      margin-bottom: 1rem;
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .accordion-title {
      padding: 1.2rem 2rem;
      font-weight: 700;
      color: var(--deep-green);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-content {
      padding: 0 2rem 1.5rem;
      color: var(--text-gray);
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    /* CTA 区域 */
    .cta-section {
      background: var(--deep-green);
      color: white;
      text-align: center;
      padding: 4rem 0;
    }
    .trust-badge {
      font-size: 0.9rem;
      opacity: 0.8;
      margin-top: 1.5rem;
    }
    /* Footer */
    .footer {
      background: #2A2A2A;
      color: #ddd;
      padding: 3rem 0 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 2rem;
    }
    .footer a {
      color: #ccc;
    }
    .copyright {
      text-align: center;
      margin-top: 2rem;
      font-size: 0.9rem;
      border-top: 1px solid #444;
      padding-top: 1.5rem;
    }

    @media (max-width: 1024px) {
      .grid-3, .pain-grid, .testimonial-grid {
        grid-template-columns: repeat(2,1fr);
      }
      h1 { font-size: 2.4rem; }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: block; }
      .hero-grid { flex-direction: column; }
      .grid-3, .pain-grid, .testimonial-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      body { padding-bottom: 70px; }
      .mobile-bottom-nav { display: flex; }
      section { padding: 3rem 0; }
    }
    @media (max-width: 520px) {
      h1 { font-size: 2rem; }
      .btn-group { flex-direction: column; align-items: stretch; }
    }