/* roulang page: index */
:root {
      --primary-deep: #2B1F3A;
      --primary-dark: #1E2A3A;
      --accent-silver: #E8ECF1;
      --accent-gold: #C49A6C;
      --bg-light: #F7F8FA;
      --text-primary: #1E2A3A;
      --text-secondary: #5A6270;
      --text-weak: #8B939F;
      --border-subtle: rgba(0,0,0,0.04);
      --radius-card: 12px;
      --radius-btn: 30px;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 10px 25px rgba(0,0,0,0.08);
      --transition-base: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', '苹方', '思源宋体', 'Noto Serif SC', 'Georgia', 'Times New Roman', serif;
      line-height: 1.6;
      background-color: var(--bg-light);
      color: var(--text-primary);
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, .nav-title, .button {
      font-family: 'PingFang SC', '苹方', '思源黑体', 'Noto Sans SC', 'Helvetica Neue', 'Arial', sans-serif;
      font-weight: 700;
      letter-spacing: -0.2px;
    }

    h1 {
      font-size: 2.8rem;
      line-height: 1.25;
    }
    h2 {
      font-size: 2rem;
      line-height: 1.3;
      margin-bottom: 1.5rem;
      color: var(--primary-deep);
    }
    h3 {
      font-size: 1.4rem;
      line-height: 1.4;
    }

    p {
      margin-bottom: 1.25rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-card);
    }

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

    /* 导航栏 */
    header {
      background: #fff;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      position: sticky;
      top: 0;
      z-index: 99;
      padding: 0.8rem 0;
    }

    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .logo i {
      color: var(--accent-gold);
      font-size: 1.8rem;
    }

    .nav-chips {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .chip {
      padding: 0.45rem 1.2rem;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      background: transparent;
      border: 1px solid var(--accent-silver);
      color: var(--text-secondary);
      transition: all var(--transition-base);
      white-space: nowrap;
      letter-spacing: 0.3px;
    }
    .chip:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
      background: rgba(196,154,108,0.04);
    }
    .chip.active {
      background: var(--accent-gold);
      border-color: var(--accent-gold);
      color: white;
    }

    .btn-primary {
      background: linear-gradient(135deg, #2B1F3A 0%, #1E2A3A 100%);
      border: none;
      color: white;
      padding: 0.6rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      letter-spacing: 0.5px;
      transition: all var(--transition-base);
      display: inline-block;
      text-align: center;
      box-shadow: 0 4px 10px rgba(43,31,58,0.2);
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #3E2D4F 0%, #2A3A4F 100%);
      box-shadow: 0 6px 18px rgba(196,154,108,0.3);
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 0.55rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      letter-spacing: 0.5px;
      transition: all var(--transition-base);
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--accent-gold);
      color: white;
      border-color: var(--accent-gold);
    }

    /* 汉堡菜单隐藏 */
    .hamburger {
      display: none;
      font-size: 1.8rem;
      cursor: pointer;
      color: var(--primary-deep);
    }

    /* Hero */
    #hero {
      background: linear-gradient(270deg, rgba(30,42,58,0.75) 0%, rgba(43,31,58,0.9) 70%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      padding: 4rem 0;
      position: relative;
    }
    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 2.5rem;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero-text h1 {
      color: white;
      margin-bottom: 1.2rem;
    }
    .hero-text p {
      color: rgba(255,255,255,0.8);
      font-size: 1.2rem;
      margin-bottom: 2rem;
    }
    .hero-image {
      flex: 1 1 400px;
    }
    .hero-image img {
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }

    section {
      padding: 80px 0;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .pain-card {
      flex: 1 1 250px;
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-sm);
      border-left: 6px solid var(--accent-gold);
      transition: all var(--transition-base);
      position: relative;
    }
    .pain-card:hover {
      box-shadow: var(--shadow-hover);
      border-left-width: 10px;
      transform: translateY(-2px);
    }
    .pain-card i {
      font-size: 2.2rem;
      color: var(--accent-gold);
      margin-bottom: 1rem;
    }

    /* 解决方案交错 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 4rem;
    }
    .solution-row.reverse {
      flex-direction: row-reverse;
    }
    .solution-text {
      flex: 1;
    }
    .solution-img {
      flex: 1;
      position: relative;
    }
    .solution-img img {
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
    }

    /* 数据卡片 */
    .stats-grid {
      display: flex;
      gap: 2rem;
      flex-wrap: wrap;
      justify-content: center;
    }
    .stat-card {
      background: white;
      padding: 2.5rem 2rem;
      border-radius: var(--radius-card);
      text-align: center;
      flex: 1 1 180px;
      box-shadow: var(--shadow-sm);
      background: linear-gradient(180deg, #fff 0%, #F7F8FA 100%);
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    /* 证言 */
    .testimonial-scroll {
      display: flex;
      gap: 2rem;
      overflow-x: auto;
      padding: 1rem 0.5rem;
      scrollbar-width: thin;
    }
    .testimonial-card {
      min-width: 300px;
      background: #F4F2F8;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      flex: 1;
    }
    .testimonial-card .quote {
      font-style: italic;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 1.2rem 1.8rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 1.8rem 1.5rem;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.7);
      padding: 3rem 0 1.5rem;
    }
    footer a:hover {
      color: var(--accent-gold);
    }

    @media (max-width: 1024px) {
      h1 { font-size: 2.2rem; }
      .solution-row { flex-direction: column; }
      .solution-row.reverse { flex-direction: column; }
    }

    @media (max-width: 640px) {
      .nav-chips { display: none; }
      .hamburger { display: block; }
      .nav-grid { flex-wrap: wrap; }
      .container { padding: 0 16px; }
      h1 { font-size: 1.9rem; }
      section { padding: 60px 0; }
      .hero-content { flex-direction: column; }
    }