/* RealtyPrompts - 深蓝 + 白 + 暖灰（英文 B2B 风格，克制的 SaaS 感） */
:root {
  --blue: #1F4E79;          /* 主色：深蓝 */
  --blue-dark: #173A5C;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FA;
  --text: #2C3238;
  --text-light: #6B7683;
  --line: #E4E8EC;
  --accent: #C08A3E;        /* 暖橙点缀（CTA） */
  --sans: -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--sans); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; }
.container { max-width: 900px; margin: 0 auto; padding: 0 20px; }

.site-header { background: var(--blue); position: sticky; top: 0; z-index: 10; box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; max-width: 980px; }
.logo { color: #fff; font-size: 19px; font-weight: 700; text-decoration: none; letter-spacing: 0.3px; }
.logo span { color: #F0B35F; }
.main-nav a { color: rgba(255,255,255,0.88); text-decoration: none; margin-left: 22px; font-size: 14.5px; }
.main-nav a:hover { color: #fff; }

.hero { padding: 64px 20px 48px; max-width: 780px; }
.hero h1 { font-size: 32px; font-weight: 800; color: var(--blue-dark); line-height: 1.35; letter-spacing: -0.4px; margin-bottom: 16px; }
.hero-sub { color: var(--text-light); font-size: 17px; line-height: 1.8; margin-bottom: 26px; }
.btn-primary { display: inline-block; background: var(--accent); color: #fff; font-weight: 700; padding: 13px 28px; border-radius: 6px; text-decoration: none; font-size: 15px; }
.btn-primary:hover { background: #B07A2F; }

.section { padding: 30px 0 50px; }
.section-title { font-size: 21px; font-weight: 700; color: var(--blue-dark); border-left: 4px solid var(--blue); padding-left: 12px; margin-bottom: 22px; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.feature-card { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.feature-card h3 { font-size: 15.5px; color: var(--blue-dark); margin-bottom: 6px; }
.feature-card p { font-size: 13.5px; color: var(--text-light); }

.article-item { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px 22px; margin-bottom: 12px; transition: border-color 0.15s; }
.article-item:hover { border-color: var(--blue); }
.article-item h3 { font-size: 17px; color: var(--blue-dark); margin-bottom: 4px; }
.article-item a { text-decoration: none; color: inherit; }
.article-meta { font-size: 12.5px; color: var(--text-light); margin-bottom: 6px; }
.article-excerpt { font-size: 14px; color: #666; }
.loading, .empty { color: var(--text-light); padding: 20px 0; }

.site-footer { background: var(--blue-dark); color: rgba(255,255,255,0.75); padding: 26px 0; margin-top: 30px; font-size: 13px; text-align: center; }
.footer-links { margin-top: 6px; }
.footer-links a { color: rgba(255,255,255,0.6); text-decoration: none; margin: 0 8px; }

/* 产品页 */
.product-hero { text-align: center; padding: 56px 20px 30px; max-width: 760px; margin: 0 auto; }
.product-hero h1 { font-size: 28px; font-weight: 800; color: var(--blue-dark); margin-bottom: 12px; }
.product-price { font-size: 20px; color: var(--accent); font-weight: 700; margin: 10px 0; }
.product-cta { margin: 22px 0; }
.prompt-list { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; padding: 26px 30px; margin: 24px 0; }
.prompt-list h3 { color: var(--blue-dark); margin-bottom: 8px; font-size: 16px; }
.prompt-list ul { margin-left: 20px; }
.prompt-list li { margin-bottom: 5px; font-size: 14.5px; color: #444; }

/* 文章页 */
.article-body { max-width: 760px; margin: 0 auto; padding: 40px 20px; }
.article-body h1 { font-size: 27px; color: var(--blue-dark); margin-bottom: 8px; }
.article-body .post-meta { font-size: 13px; color: var(--text-light); margin-bottom: 24px; }
.article-body h2 { font-size: 20px; color: var(--blue-dark); margin: 28px 0 10px; }
.article-body h3 { font-size: 16.5px; color: var(--blue-dark); margin: 20px 0 8px; }
.article-body p { margin-bottom: 15px; }
.article-body ul, .article-body ol { margin: 0 0 15px 22px; }
.article-body li { margin-bottom: 5px; }
.article-body .prompt-box { background: #F3F6F9; border: 1px solid var(--line); border-left: 4px solid var(--blue); border-radius: 6px; padding: 14px 18px; margin: 12px 0; font-size: 14px; color: #333; font-style: italic; }
.cta-box { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; padding: 22px 26px; margin: 28px 0; text-align: center; }
.cta-box p { margin-bottom: 12px; color: var(--blue-dark); font-weight: 600; }
.cta-box .btn-primary { padding: 11px 24px; font-size: 14px; }

@media (max-width: 640px) {
  .hero h1 { font-size: 24px; }
  .hero { padding: 44px 16px 34px; }
  .main-nav { display: none; }
}