/* roulang page: index */
:root {
      --deep-forest: #0B3D3A;
      --warm-copper: #C87A4C;
      --copper-dark: #A8653A;
      --soft-white: #F7F6F2;
      --text-primary: #1e1e1e;
      --text-body: #2E2E2E;
      --text-muted: #5f5f5f;
      --border-light: rgba(0,0,0,0.06);
      --shadow-card: 0 10px 25px -8px rgba(0,0,0,0.08);
      --shadow-hover: 0 20px 35px -12px rgba(0,0,0,0.15);
      --radius-lg: 20px;
      --radius-pill: 30px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--soft-white);
      color: var(--text-body);
      margin: 0;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 10px rgba(0,0,0,0.04);
      z-index: 40;
      padding: 12px 0;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo-area {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--deep-forest);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .logo-area span {
      color: var(--warm-copper);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-body);
      padding: 0.4rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--deep-forest);
      border-bottom-color: var(--warm-copper);
    }
    .btn-contact {
      background: var(--warm-copper);
      color: white !important;
      padding: 0.6rem 1.6rem !important;
      border-radius: var(--radius-pill);
      font-weight: 600;
      border: none !important;
      transition: var(--transition);
      margin-left: 0.8rem;
      white-space: nowrap;
    }
    .btn-contact:hover {
      background: var(--copper-dark);
      box-shadow: 0 8px 18px rgba(200,122,76,0.3);
      color: white !important;
    }
    .mega-trigger {
      cursor: pointer;
      position: relative;
      font-weight: 500;
      color: var(--text-body);
      display: flex;
      align-items: center;
      gap: 4px;
      font-size: 0.95rem;
    }
    .mega-panel {
      position: absolute;
      top: 60px;
      right: 24px;
      background: white;
      border-radius: 16px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.12);
      padding: 24px;
      width: 320px;
      display: none;
      z-index: 50;
      border: 1px solid rgba(0,0,0,0.04);
    }
    .mega-panel.active {
      display: block;
    }
    .mega-panel .mini-card {
      display: flex;
      gap: 12px;
      margin-bottom: 16px;
    }
    .mega-panel img {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      object-fit: cover;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--deep-forest);
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links {
        gap: 1.2rem;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--deep-forest);
        flex-direction: column;
        padding: 24px;
        gap: 1.5rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.2);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        color: white;
        font-size: 1.1rem;
      }
      .btn-contact {
        background: var(--warm-copper);
        margin-left: 0;
        text-align: center;
      }
      .hamburger {
        display: block;
      }
      .mega-trigger {
        display: none;
      }
      .mega-panel {
        display: none;
      }
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--deep-forest);
      margin-bottom: 0.8rem;
      text-align: center;
    }
    .section-sub {
      color: var(--text-muted);
      text-align: center;
      max-width: 640px;
      margin: 0 auto 48px;
      font-size: 1.1rem;
    }

    /* Hero */
    .hero {
      background: linear-gradient(90deg, rgba(11,61,58,0.88) 0%, rgba(11,61,58,0.55) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 90vh;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 0;
      padding: 120px 0 80px;
    }
    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
    }
    .hero-left h1 {
      font-size: 3.4rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.2rem;
    }
    .hero-left .sub {
      font-size: 1.3rem;
      opacity: 0.9;
      margin-bottom: 2rem;
    }
    .badge-group {
      display: flex;
      gap: 2rem;
      margin: 2rem 0 2.5rem;
      flex-wrap: wrap;
    }
    .badge-item {
      display: flex;
      flex-direction: column;
    }
    .badge-number {
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--warm-copper);
    }
    .badge-label {
      font-size: 0.9rem;
      opacity: 0.8;
    }
    .btn-primary {
      background: var(--warm-copper);
      color: white;
      padding: 0.9rem 2.4rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
      font-size: 1.1rem;
      border: none;
    }
    .btn-primary:hover {
      background: var(--copper-dark);
      box-shadow: 0 12px 24px rgba(200,122,76,0.4);
      color: white;
    }
    @media (max-width: 768px) {
      .hero-left h1 {
        font-size: 2.4rem;
      }
      .badge-group {
        gap: 1rem;
      }
    }

    /* 痛点 */
    .pain-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      justify-content: center;
    }
    .pain-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      flex: 1 1 280px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .pain-card i {
      font-size: 2.2rem;
      color: var(--warm-copper);
      margin-bottom: 1rem;
    }

    /* 解决方案 非对称布局 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 0.8fr;
      gap: 24px;
    }
    .solution-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .solution-card i {
      font-size: 2.5rem;
      color: var(--warm-copper);
      margin-bottom: 1.4rem;
    }
    .solution-card h3 {
      font-weight: 650;
      color: var(--deep-forest);
      margin-bottom: 0.8rem;
    }
    .text-link {
      color: var(--warm-copper);
      font-weight: 600;
      margin-top: auto;
      display: inline-block;
    }
    @media (max-width: 1024px) {
      .solution-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .solution-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 数据墙 */
    .stats-band {
      background: var(--deep-forest);
      padding: 60px 0;
      color: white;
    }
    .stats-flex {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
      gap: 2rem;
    }
    .stat-digit {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--warm-copper);
    }

    /* 证言 */
    .testimonial-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      justify-content: center;
    }
    .testimonial-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      flex: 1 1 320px;
      box-shadow: var(--shadow-card);
      border-left: 5px solid var(--warm-copper);
    }

    /* FAQ */
    .accordion-title {
      font-weight: 600;
      color: var(--deep-forest);
      background: white;
      border-radius: 12px;
      padding: 16px 24px;
      margin-bottom: 8px;
      cursor: pointer;
      transition: var(--transition);
    }
    .accordion-title:hover {
      background: #f0f5f4;
    }
    .accordion-content {
      padding: 0 24px 16px;
      color: var(--text-body);
    }

    /* CTA */
    .cta-dark {
      background: var(--deep-forest);
      color: white;
      text-align: center;
    }
    .btn-light {
      background: white;
      color: var(--deep-forest);
      font-weight: 700;
      padding: 0.9rem 2.8rem;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-top: 1.5rem;
    }

    footer {
      background: #f0ede6;
      padding: 60px 0 20px;
      font-size: 0.95rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }