/* roulang page: index */
:root {
      --primary-blue: #0A6EFF;
      --primary-blue-hover: #0055CC;
      --accent-gold: #F5A623;
      --accent-gold-hover: #E0920A;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-subtle: #EEF2F6;
      --bg-dark: #1E2A3A;
      --text-heading: #1A1A2E;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-light: #CBD5E1;
      --border-light: #E2E8F0;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(10,110,255,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-body: "Inter", "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: 0.3s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      padding-top: 112px; /* 双层导航高度: 64px + 48px */
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 5%;
      padding-right: 5%;
    }

    @media (max-width: 640px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 导航系统 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: #FFFFFF;
      box-shadow: 0 1px 0 var(--border-light);
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      padding: 0 5%;
      max-width: 1200px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-heading);
      font-family: var(--font-heading);
      white-space: nowrap;
    }

    .logo i {
      color: var(--primary-blue);
      font-size: 1.8rem;
    }

    .brand-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      color: var(--text-muted);
      font-size: 1.2rem;
      cursor: pointer;
      transition: color var(--transition);
    }

    .search-icon:hover {
      color: var(--primary-blue);
    }

    .btn-consult {
      background: var(--primary-blue);
      color: white;
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      font-size: 0.9rem;
      transition: background var(--transition), box-shadow var(--transition);
      white-space: nowrap;
    }

    .btn-consult:hover {
      background: var(--primary-blue-hover);
      box-shadow: 0 4px 12px rgba(10,110,255,0.4);
    }

    .channel-row {
      background: #FFFFFF;
      border-top: 1px solid var(--border-light);
      height: 48px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      padding: 0 5%;
      max-width: 1200px;
      margin: 0 auto;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }

    .channel-row::-webkit-scrollbar {
      display: none;
    }

    .pill-tab {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      color: var(--text-muted);
      background: transparent;
      transition: all var(--transition);
      margin-right: 8px;
      font-weight: 500;
    }

    .pill-tab.active {
      background: #E8F2FF;
      color: var(--primary-blue);
      font-weight: 600;
    }

    .pill-tab:hover:not(.active) {
      color: var(--primary-blue);
      background: rgba(10,110,255,0.05);
    }

    @media (max-width: 640px) {
      body {
        padding-top: 96px;
      }
      .brand-row {
        height: 56px;
      }
      .channel-row {
        height: 40px;
      }
      .logo {
        font-size: 1.2rem;
      }
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 640px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title {
      font-family: var(--font-heading);
      color: var(--text-heading);
      font-weight: 600;
    }

    /* Hero */
    #hero {
      position: relative;
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      color: white;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to right, rgba(30,42,58,0.9) 0%, rgba(30,42,58,0.3) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      color: white;
      font-family: var(--font-heading);
      margin-bottom: 1.5rem;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: #CBD5E1;
      margin-bottom: 2rem;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary-blue);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
      display: inline-block;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      background: var(--primary-blue-hover);
      box-shadow: 0 4px 12px rgba(10,110,255,0.5);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary-blue);
      color: var(--primary-blue);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition);
      display: inline-block;
    }

    .btn-outline:hover {
      background: #E8F2FF;
      color: var(--primary-blue-hover);
    }

    .hero-stats-card {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-card);
      padding: 16px 24px;
      color: white;
      display: inline-block;
      margin-top: 2rem;
    }

    @media (max-width: 640px) {
      .hero h1 {
        font-size: 2rem;
      }
      .hero-buttons .btn-primary,
      .hero-buttons .btn-outline {
        width: 100%;
        text-align: center;
      }
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
    }

    .pain-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--primary-blue);
    }

    .pain-icon {
      width: 48px;
      height: 48px;
      background: #E8F2FF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-blue);
      font-size: 1.4rem;
      margin-bottom: 20px;
    }

    .pain-title {
      font-weight: 600;
      font-size: 1.2rem;
      margin-bottom: 8px;
      color: var(--text-heading);
    }

    .pain-desc {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .pain-hint {
      font-size: 0.8rem;
      color: var(--accent-gold);
      font-weight: 500;
    }

    @media (max-width: 1024px) {
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .pain-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 解决方案 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 60px;
    }

    .solution-row.reverse {
      flex-direction: row-reverse;
    }

    .solution-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .solution-text {
      flex: 1;
    }

    .solution-text h3 {
      font-size: 1.8rem;
      margin-bottom: 16px;
    }

    .feature-list {
      list-style: none;
      margin: 20px 0;
    }

    .feature-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      color: var(--text-body);
    }

    .feature-list i {
      color: var(--primary-blue);
      font-size: 1rem;
    }

    .text-link {
      color: var(--primary-blue);
      font-weight: 600;
      transition: color var(--transition);
    }

    .text-link:hover {
      color: var(--primary-blue-hover);
    }

    @media (max-width: 768px) {
      .solution-row, .solution-row.reverse {
        flex-direction: column;
      }
    }

    /* 成果数据 */
    #results {
      background: #EEF2F6;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-item {
      background: white;
      padding: 32px 16px;
      border-radius: var(--radius-card);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-blue);
      line-height: 1.2;
    }

    .stat-label {
      color: var(--text-muted);
      margin-top: 8px;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 480px) {
      .stats-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 证言 */
    .testimonial-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border-left: 4px solid var(--primary-blue);
      transition: var(--transition);
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .testimonial-text {
      font-style: italic;
      margin: 16px 0;
      color: var(--text-body);
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

    .avatar-placeholder {
      width: 40px;
      height: 40px;
      background: #E2E8F0;
      border-radius: 50%;
    }

    @media (max-width: 768px) {
      .testimonial-cards {
        grid-template-columns: 1fr;
      }
    }

    /* FAQ */
    .accordion-item {
      margin-bottom: 12px;
      border: 1px solid var(--border-light);
      border-radius: 8px;
      background: white;
    }

    .accordion-header {
      background: white;
      padding: 16px 24px;
      font-weight: 600;
      cursor: pointer;
      transition: color var(--transition);
    }

    .accordion-header:hover {
      color: var(--primary-blue);
    }

    .accordion-content {
      padding: 0 24px 16px;
      background: #F8FAFC;
      color: var(--text-body);
    }

    /* CTA */
    #cta {
      background: linear-gradient(135deg, #0A6EFF 0%, #0055CC 100%);
      color: white;
      text-align: center;
    }

    .cta-title {
      font-size: 2.2rem;
      font-weight: 700;
    }

    .btn-gold {
      background: var(--accent-gold);
      color: #1A1A2E;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
      transition: all var(--transition);
      display: inline-block;
    }

    .btn-gold:hover {
      background: var(--accent-gold-hover);
      box-shadow: 0 6px 18px rgba(245,166,35,0.5);
    }

    /* Footer */
    footer {
      background: #1E2A3A;
      color: #CBD5E1;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }

    .footer-col h4 {
      color: white;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col a {
      display: block;
      color: #CBD5E1;
      margin-bottom: 8px;
      transition: color var(--transition);
    }

    .footer-col a:hover {
      color: var(--primary-blue);
    }

    .social-icons i {
      font-size: 1.2rem;
      margin-right: 12px;
      color: #CBD5E1;
      transition: color var(--transition);
    }

    .social-icons i:hover {
      color: var(--primary-blue);
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      font-size: 0.8rem;
      color: #94A3B8;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 480px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }