/* roulang page: index */
:root {
      --primary-orange: #E94E1B;
      --primary-orange-hover: #C43D14;
      --primary-orange-light: #FFF0EB;
      --secondary-gold: #F5A623;
      --trust-green: #2DA47D;
      --alert-red: #D32F2F;
      --ink-black: #1E1E1E;
      --cloud-gray: #F2F0EB;
      --white: #FFFFFF;
      --border-light: #E8E5DF;
      --text-body: #2C2C2C;
      --text-muted: #6B6B6B;
      --radius-card: 12px;
      --radius-button: 8px;
      --radius-tag: 6px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.12);
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Heiti SC', sans-serif;
      --font-body: 'PingFang SC', 'Noto Serif SC', 'STSong', serif;
      --transition: all 0.2s ease-in-out;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--cloud-gray);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .heading-font {
      font-family: var(--font-heading);
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: 0.02em;
      color: var(--ink-black);
    }

    h1 {
      font-size: 2rem;
      line-height: 1.2;
    }

    h2 {
      font-size: 1.75rem;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.25rem;
      font-weight: 600;
    }

    .lead {
      font-size: 1.125rem;
      color: var(--text-muted);
      font-weight: 400;
    }

    a {
      color: var(--primary-orange);
      transition: var(--transition);
      text-decoration: none;
    }

    a:hover {
      color: var(--primary-orange-hover);
      text-decoration: underline;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 16px;
    }

    /* 导航双层样式 */
    .header-outer {
      background: var(--white);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .nav-top-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border-light);
    }

    .brand-logo {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--ink-black);
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

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

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

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

    .btn-primary {
      background: var(--primary-orange);
      color: var(--white);
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-family: var(--font-heading);
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      white-space: nowrap;
      font-size: 0.95rem;
      letter-spacing: 0.5px;
      box-shadow: 0 2px 8px rgba(233,78,27,0.2);
    }

    .btn-primary:hover {
      background: var(--primary-orange-hover);
      transform: scale(1.03);
      color: white;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(233,78,27,0.3);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary-orange);
      color: var(--primary-orange);
      padding: 8px 22px;
      border-radius: var(--radius-button);
      font-weight: 600;
      font-family: var(--font-heading);
      transition: var(--transition);
      display: inline-block;
    }

    .btn-outline:hover {
      background: var(--primary-orange-light);
      color: var(--primary-orange);
      text-decoration: none;
    }

    .btn-white-outline {
      border: 1.5px solid var(--white);
      color: var(--white);
      background: transparent;
      padding: 8px 22px;
      border-radius: var(--radius-button);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-white-outline:hover {
      background: var(--white);
      color: var(--primary-orange);
      text-decoration: none;
    }

    .channel-tabs {
      display: flex;
      gap: 8px;
      padding: 10px 0;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

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

    .pill-tab {
      background: var(--cloud-gray);
      color: var(--ink-black);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      font-family: var(--font-heading);
      transition: var(--transition);
      display: inline-block;
      cursor: pointer;
    }

    .pill-tab.active, .pill-tab:hover {
      background: var(--primary-orange);
      color: var(--white);
      text-decoration: none;
    }

    /* 区块间距 */
    section {
      padding: 70px 0;
    }

    .section-title {
      margin-bottom: 2.5rem;
    }

    /* 卡片通用 */
    .card-white {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: var(--transition);
      overflow: hidden;
    }

    .card-white:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }

    .card-padding {
      padding: 24px;
    }

    /* Hero */
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }

    .hero-text {
      flex: 1;
    }

    .hero-image {
      flex: 1;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(0,0,0,0.1);
    }

    /* 痛点 */
    .pain-grid {
      display: flex;
      gap: 40px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .pain-item {
      flex: 1;
      min-width: 200px;
      text-align: center;
      padding: 0 12px;
    }

    .pain-icon {
      font-size: 2.2rem;
      color: var(--primary-orange);
      margin-bottom: 16px;
    }

    /* 解决方案卡片 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }

    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
      gap: 20px;
      flex-wrap: wrap;
    }

    .step-item {
      flex: 1;
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .step-number {
      background: var(--primary-orange);
      color: white;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.4rem;
      margin: 0 auto 12px;
    }

    /* 数据卡片 */
    .results-grid {
      display: flex;
      gap: 40px;
      align-items: center;
      flex-wrap: wrap;
    }

    .metric-large {
      font-size: 3rem;
      font-weight: 800;
      color: var(--secondary-gold);
      line-height: 1.1;
    }

    /* 证言 */
    .testimonial-cards {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 8px;
    }

    .testimonial-card {
      flex: 0 0 320px;
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-card);
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    /* FAQ */
    .accordion-title {
      font-weight: 700;
      border-left: 4px solid var(--primary-orange);
      padding-left: 16px;
      background: transparent;
      font-size: 1.1rem;
    }

    .accordion-content {
      background: #FAFAF8;
      padding: 16px 24px;
      border-radius: 0 0 var(--radius-card) var(--radius-card);
    }

    /* CTA深色区 */
    .dark-cta {
      background: var(--ink-black);
      color: white;
      text-align: center;
      padding: 80px 0;
    }

    .dark-cta h2 {
      color: white;
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      padding: 48px 0 32px;
    }

    .footer-bottom {
      border-top: 1px solid #444;
      padding: 20px 0;
      text-align: center;
      color: #aaa;
      font-size: 0.9rem;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 640px) {
      h1 {
        font-size: 2rem;
      }
      section {
        padding: 50px 0;
      }
      .pain-grid, .process-steps {
        flex-direction: column;
        align-items: center;
      }
      .results-grid {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-top-row {
        flex-wrap: wrap;
      }
      .channel-tabs {
        justify-content: flex-start;
      }
    }