/* roulang page: index */
:root {
      --primary-deepgreen: #1B5E20;
      --accent-orange: #FF6D00;
      --bg-warmgray: #F5F4F0;
      --text-heading: #1B1B1B;
      --text-body: #3A3A3A;
      --text-muted: #6B6B6B;
      --white: #FFFFFF;
      --border-light: #E8E5DF;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 30px;
      --font-stack: "PingFang SC","Microsoft YaHei",sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-warmgray);
      color: var(--text-body);
      line-height: 1.8;
      padding-top: 70px;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      color: var(--text-heading);
      font-weight: 600;
    }
    a {
      color: var(--primary-deepgreen);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-orange);
    }
    .container {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--accent-orange);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      transition: background-color 0.2s, box-shadow 0.2s;
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 8px rgba(255,109,0,0.1);
    }
    .btn-primary-custom:hover {
      background-color: #E65100;
      color: white;
      box-shadow: inset 0 1px 4px rgba(0,0,0,0.1), 0 6px 14px rgba(255,109,0,0.18);
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deepgreen);
      color: var(--primary-deepgreen);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 10px 28px;
      transition: all 0.2s;
    }
    .btn-outline-custom:hover {
      background-color: #E8F5E9;
      border-color: #1B5E20;
      color: #1B5E20;
    }
    /* 卡片系统 */
    .card-custom {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .card-custom .card-img-top {
      border-radius: var(--radius-card) var(--radius-card) 0 0;
      height: 180px;
      object-fit: cover;
      background-color: #e0e0e0;
    }
    .text-accent {
      color: var(--accent-orange);
    }
    .bg-primary-green {
      background-color: var(--primary-deepgreen);
    }
    .section-padding {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
    }
    /* 顶部信息条 */
    .top-info-bar {
      background: var(--primary-deepgreen);
      color: white;
      height: 40px;
      font-size: 0.85rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1050;
    }
    .top-info-bar a {
      color: white;
      font-weight: 500;
    }
    /* 主导航 */
    .navbar-custom {
      background: white;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      padding: 0.5rem 1rem;
      position: fixed;
      top: 40px;
      width: 100%;
      z-index: 1040;
      transition: top 0.2s;
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary-deepgreen) !important;
      letter-spacing: 1px;
    }
    .navbar-nav .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      margin: 0 5px;
      padding: 0.5rem 1rem;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--accent-orange) !important;
      border-bottom-color: var(--accent-orange);
    }
    .navbar-toggler {
      border: none;
    }
    /* Hero背景 */
    .hero-section {
      background: linear-gradient(135deg, #F5F4F0 0%, #ffffff 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-image-bg {
      position: absolute;
      right: 0;
      top: 0;
      width: 45%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.2;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.4), transparent);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.4), transparent);
      z-index: 0;
    }
    @media (max-width: 768px) {
      .hero-image-bg {
        width: 100%;
        opacity: 0.1;
      }
    }
    /* 痛点对比卡片 */
    .pain-card-left {
      background: #f0efeb;
      border-left: 4px solid #9e9e9e;
      color: #4a4a4a;
    }
    .pain-card-right {
      background: #e8f5e9;
      border-left: 4px solid var(--primary-deepgreen);
    }
    /* 统计数字 */
    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-orange);
      line-height: 1.2;
    }
    /* 证言卡片 */
    .testimonial-avatar {
      width: 48px;
      height: 48px;
      background: #ccc;
      border-radius: 50%;
      margin-right: 15px;
      background-size: cover;
    }
    /* FAQ 手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: #e8f5e9;
      color: var(--primary-deepgreen);
      font-weight: 600;
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary-deepgreen);
      box-shadow: 0 0 0 0.15rem rgba(27,94,32,0.2);
    }
    .accordion-item {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
    }
    /* 最终CTA */
    .cta-full {
      background: var(--primary-deepgreen);
      color: white;
    }
    .cta-full h2 {
      color: white;
    }
    footer {
      background: #2C2C2C;
      color: #aaa;
      font-size: 0.9rem;
    }
    footer a {
      color: #ccc;
    }
    footer a:hover {
      color: white;
    }
    .footer-title {
      color: white;
      font-weight: 600;
      margin-bottom: 1rem;
    }