/* roulang page: index */
:root {
      --primary: #0B1A2F;
      --accent: #C5A059;
      --bg: #F8F6F2;
      --highlight: #E85D3F;
      --text: #0B1A2F;
      --text-muted: #5A5D63;
      --white: #FFFFFF;
      --border-light: #E9E6DF;
      --radius: 8px;
      --shadow: 0 2px 12px rgba(11, 26, 47, 0.06);
      --shadow-hover: 0 8px 24px rgba(11, 26, 47, 0.12);
      --spacing: 120px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      transition: background 0.3s, box-shadow 0.3s, backdrop-filter 0.3s;
      background: rgba(11, 26, 47, 0.25);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    }

    .site-header.scrolled {
      background: var(--primary);
      backdrop-filter: none;
      box-shadow: 0 2px 20px rgba(0,0,0,0.2);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 1px;
    }
    .logo span {
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      gap: 2rem;
    }

    .nav-links a {
      color: rgba(255,255,255,0.9);
      font-size: 15px;
      font-weight: 500;
      transition: color 0.2s;
      padding: 0.25rem 0;
    }

    .nav-links a:hover {
      color: var(--accent);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.6rem;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 650px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      isolation: isolate;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, rgba(11,26,47,0.4), rgba(11,26,47,0.85));
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      padding: 0 24px;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      animation: fadeInUp 1s ease;
    }

    .hero .subtitle {
      font-size: 1.25rem;
      font-weight: 400;
      color: rgba(255,255,255,0.85);
      margin-bottom: 2.5rem;
    }

    .btn-group {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      border: none;
      padding: 0.85rem 2.2rem;
      border-radius: 6px;
      font-weight: 700;
      font-size: 1rem;
      transition: background 0.25s, transform 0.2s;
      position: relative;
      overflow: hidden;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-primary:hover {
      background: #B08E4A;
      transform: translateY(-2px);
      color: var(--primary);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent);
      color: var(--accent);
      padding: 0.8rem 2rem;
      border-radius: 6px;
      font-weight: 700;
      transition: all 0.25s;
    }

    .btn-outline:hover {
      background: var(--accent);
      color: var(--primary);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: white;
      font-size: 2rem;
      opacity: 0.8;
      animation: breathe 2s infinite;
      z-index: 2;
    }

    @keyframes breathe {
      0%, 100% { opacity: 0.8; transform: translateX(-50%) translateY(0); }
      50% { opacity: 1; transform: translateX(-50%) translateY(8px); }
    }
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* sections */
    section {
      padding: var(--spacing) 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }

    .pain-grid, .solution-grid, .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2.5rem;
    }

    .pain-card {
      background: transparent;
      padding: 1.5rem 1.5rem 1.5rem 1.8rem;
      border-left: 4px solid var(--accent);
      background: white;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .solution-card {
      background: white;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: all 0.3s;
      overflow: hidden;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .solution-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .solution-body {
      padding: 1.5rem;
    }
    .solution-body h3 {
      font-weight: 700;
    }

    .results {
      background: var(--primary);
      color: white;
      text-align: center;
    }
    .stats {
      display: flex;
      justify-content: center;
      gap: 3rem;
      flex-wrap: wrap;
      margin-top: 2rem;
    }
    .stat-item {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent);
    }
    .stat-label {
      font-size: 1rem;
      color: rgba(255,255,255,0.8);
    }

    .testimonial-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .testimonial-card {
      background: white;
      padding: 2rem;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      position: relative;
      font-style: italic;
    }
    .testimonial-card::before {
      content: "“";
      font-size: 4rem;
      color: var(--accent);
      opacity: 0.4;
      position: absolute;
      top: -10px;
      left: 15px;
    }

    .faq-section {
      background: white;
    }
    .accordion-title {
      font-weight: 700;
      font-size: 1.2rem;
      border-radius: 6px;
      background: #fff;
      border: 1px solid var(--border-light);
    }
    .accordion-item.is-active .accordion-title {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .accordion-content {
      background: #fff;
      border: none;
    }

    .cta-section {
      background: linear-gradient(135deg, var(--accent), #b8964a);
      text-align: center;
      color: var(--primary);
    }
    .cta-section h2 {
      color: var(--primary);
    }

    footer {
      background: var(--primary);
      color: rgba(255,255,255,0.7);
      padding: 3rem 0;
      border-top: 2px solid var(--accent);
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 2rem;
    }
    .footer-links a {
      color: rgba(255,255,255,0.7);
      margin-right: 1.5rem;
      transition: color 0.2s;
    }
    .footer-links a:hover { color: var(--accent); }

    @media (max-width: 1024px) {
      .pain-grid, .solution-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .hero h1 { font-size: 2.2rem; }
      .section-title { font-size: 1.8rem; }
      .pain-grid, .solution-grid, .testimonial-grid { grid-template-columns: 1fr; }
      .stats { flex-direction: column; gap: 2rem; }
      .nav-links { display: none; }
      .hamburger { display: block; }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: var(--primary);
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        padding: 1.5rem;
        gap: 1rem;
      }
      .mobile-menu.active { display: flex; }
    }