/* roulang page: index */
:root {
      --primary: #6C3CF0;
      --primary-deep: #5A2ED0;
      --accent: #00F0FF;
      --dark-title: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8A8F96;
      --bg-white: #FFFFFF;
      --bg-light: #F8F9FA;
      --bg-dark: #1E2127;
      --border-light: #EEEEEE;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      --shadow-btn: 0 8px 20px rgba(108, 60, 240, 0.3);
      --radius-none: 0px;
      --transition: 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-stack);
      color: var(--text-body);
      background-color: var(--bg-white);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      color: var(--dark-title);
      letter-spacing: -0.02em;
    }

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

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

    /* 自定义容器微调 */
    .container-custom {
      width: 100%;
      padding-right: 24px;
      padding-left: 24px;
      margin-right: auto;
      margin-left: auto;
      max-width: 1320px;
    }

    /* 按钮重塑 */
    .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      border-radius: var(--radius-none);
      padding: 14px 40px;
      font-weight: 600;
      color: white;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      letter-spacing: 0.02em;
    }

    .btn-primary-custom:hover {
      background-color: var(--primary-deep);
      box-shadow: var(--shadow-btn);
      color: white;
      transform: translateY(-2px);
    }

    .btn-outline-custom {
      background: transparent;
      border: none;
      padding: 8px 0;
      font-weight: 600;
      color: var(--dark-title);
      border-bottom: 2px solid var(--accent);
      transition: var(--transition);
      display: inline-block;
      letter-spacing: 0.02em;
    }

    .btn-outline-custom:hover {
      color: var(--primary);
      border-bottom-color: var(--primary);
      border-bottom-width: 2px;
    }

    /* 导航杂志频道式 */
    .navbar-custom {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border-light);
      padding: 0;
      position: sticky;
      top: 0;
      z-index: 1020;
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid transparent;
    }

    .logo-text {
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: -0.02em;
      color: var(--primary);
      line-height: 1;
      text-transform: none;
    }

    .channel-row {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      gap: 2.5rem;
      padding: 10px 0;
      flex-wrap: wrap;
    }

    .channel-link {
      font-weight: 500;
      color: var(--text-body);
      font-size: 0.95rem;
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }

    .channel-link:hover,
    .channel-link.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }

    /* 移动端汉堡菜单 */
    .navbar-toggler-custom {
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--dark-title);
    }

    @media (max-width: 768px) {
      .channel-row {
        display: none;
        flex-direction: column;
        gap: 1rem;
        padding: 16px 0;
      }
      .channel-row.show {
        display: flex;
      }
      .brand-row {
        border-bottom: 1px solid var(--border-light);
      }
    }

    /* Hero 区域 */
    .hero-section {
      background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
      position: relative;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: rgba(30, 33, 39, 0.55);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.1;
      color: white;
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      font-size: 1.2rem;
      font-weight: 400;
      color: rgba(255,255,255,0.9);
      margin-bottom: 2rem;
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
    }

    /* 区块标题 */
    .section-title {
      font-weight: 700;
      font-size: 2.2rem;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
      position: relative;
      padding-left: 56px;
      color: var(--dark-title);
    }
    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 40px;
      height: 3px;
      background: var(--primary);
    }

    /* 痛点卡片 */
    .pain-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: 0;
      padding: 2rem;
      position: relative;
      transition: var(--transition);
      height: 100%;
    }
    .pain-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .pain-number {
      font-size: 4rem;
      font-weight: 900;
      color: #F0F0F0;
      position: absolute;
      top: 10px;
      left: 20px;
      line-height: 1;
      z-index: 0;
    }
    .pain-content {
      position: relative;
      z-index: 1;
    }

    /* 解决方案不对称栅格 */
    .solution-main-card {
      background: #fafafa;
      border: 1px solid var(--border-light);
      border-radius: 0;
      overflow: hidden;
      height: 100%;
    }
    .solution-main-card img {
      filter: grayscale(100%);
      transition: 0.4s ease;
    }
    .solution-main-card:hover img {
      filter: grayscale(0%);
    }
    .solution-small-card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: 0;
      padding: 2rem;
      height: 100%;
      transition: var(--transition);
    }
    .solution-small-card:hover {
      border-color: var(--primary);
    }
    .list-accent {
      list-style: none;
      padding-left: 0;
    }
    .list-accent li {
      margin-bottom: 12px;
      display: flex;
      align-items: flex-start;
    }
    .list-accent li::before {
      content: '●';
      color: var(--accent);
      font-weight: bold;
      margin-right: 12px;
      font-size: 1.2rem;
      line-height: 1.4;
    }

    /* 数据模块 */
    .data-number {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
    }
    .data-label {
      font-weight: 300;
      color: var(--text-muted);
    }

    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-light);
      border-radius: 0;
      padding: 2.5rem;
      border: none;
      text-align: left;
    }
    .quote-mark {
      font-size: 3rem;
      color: var(--primary);
      opacity: 0.3;
      line-height: 1;
    }

    /* FAQ手风琴定制 */
    .accordion-button-custom {
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
      font-weight: 600;
      font-size: 1.2rem;
      padding: 1.2rem 0;
      color: var(--dark-title);
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-light);
    }
    .accordion-button-custom .icon {
      transition: 0.2s;
      font-size: 1.5rem;
      color: var(--text-muted);
    }
    .accordion-body-custom {
      padding: 1rem 0 1.5rem 16px;
      border-left: 2px solid var(--primary);
      margin-left: 4px;
      color: var(--text-body);
    }

    /* CTA深色区 */
    .cta-dark {
      background: var(--bg-dark);
      padding: 5rem 0;
    }
    .footer-dark {
      background: var(--bg-dark);
      color: #B0B8C1;
      padding: 3rem 0 1.5rem;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .footer-link {
      color: #B0B8C1;
      transition: var(--transition);
    }
    .footer-link:hover {
      color: white;
    }
    .social-icon {
      font-size: 1.5rem;
      margin-right: 1rem;
      color: #B0B8C1;
    }
    .social-icon:hover {
      color: var(--accent);
    }

    /* 覆盖bootstrap默认 */
    .btn-primary { background-color: var(--primary); border-color: var(--primary); border-radius: 0; }
    .btn-primary:hover { background-color: var(--primary-deep); border-color: var(--primary-deep); }
    .card { border-radius: 0; }