/* roulang page: index */
:root {
      --deep-teal: #0D4B4F;
      --warm-gold: #E8B86D;
      --warm-gold-hover: #D49A3C;
      --bg-warm: #F7F5F2;
      --text-dark: #1E2B2C;
      --text-mid: #5B6B6C;
      --white: #FFFFFF;
      --soft-teal: #EDF4F4;
      --border-light: #e0e3e3;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-img: 16px;
      --font-title: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --transition: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.8;
      font-size: 16px;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-title);
      font-weight: 600;
      color: var(--text-dark);
    }
    
    h1 {
      font-weight: 700;
    }
    
    a {
      color: var(--deep-teal);
      text-decoration: none;
      transition: var(--transition);
    }
    
    a:hover {
      color: var(--warm-gold);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 容器微调 */
    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding-left: 15px;
      padding-right: 15px;
    }
    
    /* 导航栏 */
    .navbar {
      background-color: rgba(255,255,255,0.96);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 12px 0;
      transition: var(--transition);
    }
    
    .navbar-brand {
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--deep-teal) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .navbar-brand i {
      font-size: 2rem;
      color: var(--warm-gold);
    }
    
    .nav-link {
      color: var(--text-dark) !important;
      font-weight: 500;
      margin: 0 8px;
      padding: 6px 12px !important;
      border-radius: 6px;
      transition: var(--transition);
    }
    
    .nav-link:hover, .nav-link.active {
      color: var(--warm-gold) !important;
      background-color: rgba(232,184,109,0.08);
    }
    
    .navbar-toggler {
      border: none;
      color: var(--deep-teal);
      font-size: 1.5rem;
      padding: 6px;
    }
    
    .navbar-toggler:focus {
      box-shadow: none;
      outline: 2px solid var(--warm-gold);
    }
    
    /* 移动端菜单全屏覆盖 */
    @media (max-width: 767.98px) {
      .navbar-collapse {
        background: white;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        z-index: 1050;
        transition: all 0.3s;
      }
      .nav-link {
        font-size: 1.6rem;
        margin: 12px 0;
      }
    }
    
    /* Hero 区域 */
    .hero-section {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
    }
    
    .hero-overlay {
      background: rgba(13,75,79,0.75);
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
    }
    
    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.3;
      color: white;
      text-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
    
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,240,0.9);
      margin: 1.5rem 0 2rem;
    }
    
    .btn-primary-custom {
      background: var(--warm-gold);
      border: none;
      color: var(--text-dark);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(232,184,109,0.4);
    }
    
    .btn-primary-custom:hover {
      background: var(--warm-gold-hover);
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(212,154,60,0.5);
    }
    
    .btn-outline-custom {
      border: 2px solid var(--deep-teal);
      background: transparent;
      color: var(--deep-teal);
      font-weight: 600;
      padding: 10px 28px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
    }
    
    .btn-outline-custom:hover {
      background: rgba(13,75,79,0.06);
      border-color: var(--warm-gold);
      color: var(--warm-gold);
    }
    
    /* 板块通用 */
    section {
      padding: 90px 0;
    }
    
    @media (max-width: 767.98px) {
      section {
        padding: 60px 0;
      }
      .hero-title {
        font-size: 2.4rem;
      }
    }
    
    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 1rem;
      color: var(--deep-teal);
    }
    
    .section-sub {
      color: var(--text-mid);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }
    
    /* 痛点卡片 */
    .pain-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      box-shadow: none;
      border-bottom: 1px solid var(--border-light);
      transition: var(--transition);
      height: 100%;
    }
    
    .pain-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      border-bottom-color: transparent;
    }
    
    .pain-icon {
      font-size: 2.2rem;
      color: var(--warm-gold);
      margin-bottom: 1.2rem;
    }
    
    /* 解决方案图文交替 */
    .solution-img {
      border-radius: var(--radius-img);
      object-fit: cover;
      width: 100%;
      height: auto;
      box-shadow: var(--shadow-sm);
    }
    
    /* 成果数据卡 */
    .stat-card {
      background: #F0EFEC;
      border-radius: 16px;
      padding: 2rem 1.5rem;
      text-align: center;
      transition: var(--transition);
    }
    
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--deep-teal);
      line-height: 1.2;
    }
    
    /* 证言 */
    .testimonial-block {
      background: var(--soft-teal);
      border-radius: 20px;
      padding: 2.5rem;
      position: relative;
    }
    
    .quote-mark {
      font-size: 5rem;
      color: rgba(13,75,79,0.1);
      position: absolute;
      top: -10px;
      left: 20px;
      line-height: 1;
    }
    
    .testimonial-text {
      font-size: 1.25rem;
      font-style: italic;
      color: var(--text-dark);
    }
    
    .avatar-placeholder {
      width: 60px;
      height: 60px;
      background: var(--deep-teal);
      border-radius: 50%;
      display: inline-block;
      margin-right: 12px;
    }
    
    /* FAQ 手风琴 */
    .accordion-button {
      font-weight: 600;
      font-size: 1.1rem;
      background: white;
      color: var(--text-dark);
      border: none;
      border-bottom: 1px solid var(--border-light);
      border-radius: 8px !important;
      box-shadow: none;
      padding: 1.2rem 1.5rem;
    }
    
    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--deep-teal);
      box-shadow: none;
      border-bottom-color: var(--warm-gold);
    }
    
    .accordion-item {
      border: none;
      margin-bottom: 8px;
    }
    
    /* CTA 终局 */
    .cta-final {
      background: linear-gradient(135deg, #E8B86D 0%, #D49A3C 100%);
      border-radius: 24px;
      padding: 3.5rem 2rem;
      text-align: center;
      color: var(--text-dark);
    }
    
    .btn-reverse {
      background: var(--deep-teal);
      color: white;
      font-weight: 600;
      border: none;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
    }
    
    .btn-reverse:hover {
      background: #0a3a3d;
      color: var(--warm-gold);
    }
    
    /* 页脚 */
    footer {
      background: #1E2B2C;
      color: #B0B8B9;
      padding: 3rem 0 1.5rem;
    }
    
    footer a {
      color: #B0B8B9;
    }
    
    footer a:hover {
      color: var(--warm-gold);
    }
    
    .footer-brand {
      font-weight: 700;
      font-size: 1.6rem;
      color: white;
    }