/* roulang page: index */
:root {
      --primary: #1A5FDC;
      --primary-hover: #1550C0;
      --accent: #F5A623;
      --accent-hover: #E0960F;
      --bg: #F8FAFC;
      --surface: #FFFFFF;
      --text: #1E293B;
      --text-secondary: #64748B;
      --border: #E2E8F0;
      --border-light: #F1F5F9;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Display", system-ui, sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input, textarea {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航栏 - 杂志频道风格 */
    .header {
      background-color: #fff;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      border-bottom: 1px solid var(--border-light);
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: bold;
      font-size: 1.2rem;
    }
    .nav-cta {
      background: var(--accent);
      color: #fff;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      transition: background 0.2s, transform 0.2s;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
    }
    .channel-row {
      background: #F8FAFC;
      height: 48px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .channel-row::-webkit-scrollbar {
      display: none;
    }
    .channel-links {
      display: flex;
      gap: 8px;
      align-items: center;
      height: 100%;
    }
    .channel-links a {
      padding: 0 16px;
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-secondary);
      transition: color 0.2s;
      height: 100%;
      display: flex;
      align-items: center;
      border-bottom: 2px solid transparent;
    }
    .channel-links a:hover,
    .channel-links a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      font-size: 1.8rem;
      color: var(--text);
      cursor: pointer;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .channel-row {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        height: auto;
        box-shadow: var(--shadow-md);
        padding: 12px 0;
        z-index: 99;
      }
      .channel-row.open {
        display: flex;
      }
      .channel-links {
        flex-direction: column;
        width: 100%;
      }
      .channel-links a {
        padding: 14px 24px;
        border-bottom: 1px solid var(--border-light);
        width: 100%;
      }
      .mobile-menu-btn {
        display: block;
      }
    }
    /* Hero */
    .hero {
      background: #fff;
      padding: 60px 0;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-text {
      flex: 1;
    }
    .hero-text h1 {
      font-size: clamp(2.2rem, 5vw, 3rem);
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: var(--text);
    }
    .hero-highlight {
      color: var(--primary);
      position: relative;
    }
    .hero-sub {
      color: var(--text-secondary);
      font-size: 1.1rem;
      margin: 20px 0 28px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background 0.2s, box-shadow 0.2s;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: var(--shadow-sm);
    }
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: transparent;
      transition: background 0.2s;
    }
    .btn-outline:hover {
      background: rgba(26,95,220,0.05);
    }
    .trust-bar {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }
    .trust-logos {
      display: flex;
      gap: 20px;
      filter: grayscale(1);
      opacity: 0.7;
    }
    .trust-text {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }
    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      min-height: 320px;
      box-shadow: var(--shadow-sm);
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-image {
        width: 100%;
        min-height: 260px;
      }
    }
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 600;
      margin-bottom: 16px;
      text-align: center;
      color: var(--text);
    }
    .section-sub {
      color: var(--text-secondary);
      text-align: center;
      max-width: 640px;
      margin: 0 auto 48px;
      font-size: 1.1rem;
    }
    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
    }
    .pain-card {
      background: #F1F5F9;
      padding: 28px;
      border-radius: var(--radius-card);
      transition: all 0.2s;
    }
    .pain-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .pain-card h3 {
      margin-bottom: 12px;
      font-weight: 600;
    }
    /* 解决方案卡片 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }
    .solution-card {
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .solution-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .solution-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .solution-content {
      padding: 24px;
    }
    .solution-content h3 {
      font-weight: 600;
      margin-bottom: 10px;
    }
    .solution-content p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-bottom: 16px;
    }
    .text-link {
      color: var(--primary);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    /* 数据区块 */
    .stats-block {
      background: rgba(26,95,220,0.03);
      border-radius: var(--radius-card);
      padding: 48px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent);
    }
    .stat-label {
      color: var(--text-secondary);
      font-size: 0.95rem;
    }
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .testimonial-card {
      background: #fff;
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .quote-icon {
      font-size: 2.5rem;
      color: var(--primary);
      opacity: 0.3;
      position: absolute;
      top: 12px;
      left: 20px;
    }
    .testimonial-text {
      font-style: italic;
      margin: 24px 0 20px;
      color: var(--text);
    }
    .client-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .client-avatar {
      width: 44px;
      height: 44px;
      background: #e2e8f0;
      border-radius: 50%;
    }
    .client-name {
      font-weight: 600;
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-btn);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      padding: 18px 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--text);
    }
    .faq-answer {
      padding: 0 20px 18px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-icon {
      font-size: 1.4rem;
      transition: 0.2s;
    }
    /* CTA */
    .cta-section {
      background: rgba(26,95,220,0.04);
      text-align: center;
      padding: 80px 0;
    }
    .cta-form {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      max-width: 700px;
      margin: 32px auto 0;
      justify-content: center;
    }
    .cta-input {
      flex: 1 1 200px;
      padding: 14px 16px;
      background: #fff;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-input);
    }
    .cta-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(26,95,220,0.1);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
    }
    /* 页脚 */
    .footer {
      background: #1E293B;
      color: #CBD5E1;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }
    .footer h4 {
      color: #fff;
      margin-bottom: 16px;
    }
    .footer a {
      display: block;
      color: #CBD5E1;
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid #334155;
      margin-top: 32px;
      padding-top: 24px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }