/* roulang page: index */
:root {
      --color-yongli-gold: #4A3F35;
      --color-yongli-bronze: #2F4F4F;
      --color-bg-warm: #FAF7F2;
      --color-bg-dark: #1E1B18;
      --color-text-soft: #5A5046;
      --color-text-muted: #A9A095;
      --color-text-light: #D4C5B2;
      --radius-card: 12px;
      --radius-btn: 9999px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.02);
      --shadow-card-hover: 0 8px 30px rgba(74,63,53,0.08);
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
      --max-width-section: 1280px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--color-bg-warm);
      color: var(--color-yongli-gold);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3 {
      font-family: var(--font-serif);
      font-weight: 600;
      letter-spacing: 0.02em;
    }

    .container {
      max-width: var(--max-width-section);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 悬浮胶囊导航 */
    .nav-capsule {
      background: rgba(30,27,24,0.8);
      backdrop-filter: blur(12px);
      border-radius: 40px;
      padding: 0.75rem 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.3s ease;
      box-shadow: 0 10px 25px -10px rgba(0,0,0,0.15);
      border: 1px solid rgba(255,255,255,0.08);
      width: fit-content;
      max-width: 100%;
    }
    .nav-brand {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.4rem;
      color: #FAF7F2;
      letter-spacing: 0.05em;
      margin-right: 2rem;
      white-space: nowrap;
    }
    .nav-links a {
      color: var(--color-bg-warm);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.9rem;
      margin-left: 1.8rem;
      transition: color 0.2s ease;
      letter-spacing: 0.3px;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--color-text-light);
    }

    /* 按钮体系 */
    .btn-primary {
      background-color: var(--color-yongli-gold);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.9rem 2.4rem;
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.3px;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 6px 18px rgba(74,63,53,0.2);
    }
    .btn-primary:hover {
      background-color: #3B322A;
      box-shadow: 0 10px 25px rgba(74,63,53,0.35);
      transform: translateY(-1px);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--color-yongli-gold);
      color: var(--color-yongli-gold);
      border-radius: var(--radius-btn);
      padding: 0.8rem 2.2rem;
      font-weight: 600;
      transition: all 0.25s ease;
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background-color: var(--color-yongli-gold);
      color: white;
    }

    /* 卡片 */
    .card {
      background: #FFFBF5;
      border: 1px solid rgba(74,63,53,0.08);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
      border-color: rgba(74,63,53,0.15);
    }

    .stat-number {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--color-yongli-bronze);
      line-height: 1.2;
    }

    /* Hero 背景渐变 */
    .hero-gradient {
      background: linear-gradient(180deg, rgba(30,27,24,0.78) 0%, rgba(30,27,24,0.5) 100%);
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid rgba(74,63,53,0.18);
      background: var(--color-bg-warm);
      transition: all 0.25s;
    }
    .faq-question {
      font-weight: 600;
      font-size: 1.2rem;
      color: var(--color-yongli-gold);
      padding: 1.4rem 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--color-text-soft);
      line-height: 1.8;
      background: white;
      border-radius: 0 0 8px 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 150px;
      padding: 0 1.5rem 1.5rem 1.5rem;
      margin-bottom: 0.5rem;
    }
    .faq-item.active .faq-question i {
      transform: rotate(45deg);
    }

    /* 证言大引号 */
    .testimonial-quote {
      font-family: var(--font-serif);
      font-size: 1.4rem;
      line-height: 1.9;
      position: relative;
    }
    .testimonial-quote::before {
      content: "“";
      font-size: 5rem;
      color: var(--color-yongli-bronze);
      opacity: 0.25;
      position: absolute;
      left: -1.2rem;
      top: -2.2rem;
      line-height: 1;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .nav-capsule {
        width: auto;
        padding: 0.6rem 1.5rem;
      }
      .nav-brand {
        font-size: 1.2rem;
        margin-right: 1rem;
      }
      .nav-links a {
        margin-left: 1rem;
        font-size: 0.8rem;
      }
      h1 { font-size: 2.2rem; }
      h2 { font-size: 1.8rem; }
    }
    @media (max-width: 768px) {
      .nav-capsule {
        width: 95%;
        justify-content: center;
        flex-wrap: wrap;
        padding: 0.5rem 1rem;
      }
      .nav-brand {
        font-size: 1.3rem;
        width: 100%;
        text-align: center;
        margin-right: 0;
        margin-bottom: 0.5rem;
      }
      .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
      }
      .nav-links a {
        margin-left: 0;
        font-size: 0.8rem;
      }
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      h1 { font-size: 2rem; line-height: 1.3; }
      h2 { font-size: 1.6rem; }
    }
    @media (max-width: 520px) {
      .nav-capsule {
        border-radius: 28px;
      }
      .stat-number {
        font-size: 2.2rem;
      }
    }