/* roulang page: index */
:root {
      --primary-deep: #1A2233;
      --primary-gold: #C8A45C;
      --gold-hover: #B8943A;
      --accent-red: #D4524A;
      --func-green: #00A86B;
      --warn-orange: #F5A623;
      --bg-warm: #F7F5F2;
      --card-white: #FFFFFF;
      --text-black: #1F2329;
      --text-gray: #7A7E85;
      --border-light: #E8E5DF;
      --shadow-xs: 0 2px 8px rgba(0,0,0,0.03);
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 30px rgba(0,0,0,0.06);
      --radius-sm: 8px;
      --radius-lg: 12px;
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --max-width: 1200px;
      --header-height: 64px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-black);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
      padding-top: var(--header-height);
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 200ms ease;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      height: var(--header-height);
      display: flex;
      align-items: center;
      z-index: 100;
      border-bottom: 1px solid transparent;
      transition: all 250ms ease;
      box-shadow: 0 1px 0 var(--border-light);
    }
    .header.scrolled {
      box-shadow: var(--shadow-xs);
      border-bottom-color: var(--border-light);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-deep);
      letter-spacing: 0.5px;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--primary-gold);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-black);
      position: relative;
      padding: 8px 0;
      transition: color 200ms;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-gold);
      transition: width 250ms ease;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-gold);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--primary-deep);
    }
    .mobile-menu {
      display: none;
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }

    /* Hero */
    .hero {
      background: linear-gradient(90deg, rgba(26,34,51,0.82) 0%, rgba(26,34,51,0.4) 70%, transparent 100%), 
                  url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      color: white;
      min-height: 85vh;
      display: flex;
      align-items: center;
      position: relative;
      margin-top: calc(-1 * var(--header-height));
      padding-top: var(--header-height);
    }
    .hero-content {
      max-width: 680px;
      animation: fadeUp 0.8s ease;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: 1px;
      margin-bottom: 24px;
      color: white;
    }
    .hero .highlight {
      color: var(--primary-gold);
    }
    .hero p {
      font-size: 18px;
      color: rgba(255,255,255,0.9);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .btn-primary {
      background: var(--primary-gold);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 8px 16px rgba(200,164,92,0.3);
    }
    .btn-primary:hover {
      background: var(--gold-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(200,164,92,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      margin-left: 16px;
    }
    .btn-outline:hover {
      background: white;
      color: var(--primary-deep);
      border-color: white;
      transform: translateY(-2px);
    }

    /* 板块标题 */
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    .section-sub {
      font-size: 18px;
      color: var(--text-gray);
      margin-bottom: 48px;
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .pain-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 24px;
      transition: all 250ms ease;
    }
    .pain-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .pain-icon {
      font-size: 32px;
      color: var(--primary-gold);
    }
    .pain-text h3 {
      font-size: 22px;
      margin-bottom: 8px;
    }

    /* 方案区 Z型布局 */
    .solution-z {
      display: flex;
      flex-direction: column;
      gap: 64px;
    }
    .solution-item {
      display: flex;
      align-items: center;
      gap: 64px;
    }
    .solution-item.reverse {
      flex-direction: row-reverse;
    }
    .solution-img {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .solution-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .solution-desc {
      flex: 1;
    }
    .solution-desc h3 {
      font-size: 26px;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    .tag {
      background: rgba(200,164,92,0.12);
      color: var(--primary-gold);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 16px;
    }

    /* 数据区 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-gold);
      line-height: 1.2;
    }
    .stat-label {
      color: var(--text-gray);
      margin-top: 8px;
    }

    /* 证言卡片 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .testimonial-card {
      background: #FAF9F7;
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
      box-shadow: var(--shadow-xs);
    }
    .avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      object-fit: cover;
      flex-shrink: 0;
      background: #ddd;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-gray);
      font-size: 16px;
      padding-right: 40px;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .faq-icon {
      color: var(--primary-gold);
      transition: transform 0.2s;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary-deep);
      border-radius: var(--radius-lg);
      padding: 64px;
      text-align: center;
      color: white;
    }
    .cta-banner h2 {
      font-size: 32px;
      margin-bottom: 24px;
    }

    /* Footer */
    .footer {
      background: var(--primary-deep);
      color: white;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: #ccc;
      transition: color 200ms;
    }
    .footer a:hover {
      color: var(--primary-gold);
    }
    .copyright {
      margin-top: 40px;
      color: var(--text-gray);
      font-size: 14px;
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .pain-grid, .testimonial-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .solution-item, .solution-item.reverse { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .container, .header-inner { padding: 0 20px; }
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .mobile-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-md);
      }
      .mobile-menu.open { display: flex; }
      .hero h1 { font-size: 36px; }
      .section-title { font-size: 28px; }
      .btn-outline { margin-left: 0; margin-top: 12px; }
      .footer-grid { grid-template-columns: 1fr; }
      .cta-banner { padding: 40px 24px; }
    }