/* 领天卓科技 — 行业洞察文章页共享样式（与首页设计系统一致） */
:root {
  --cream: #FBF9F4;
  --cream-2: #F4F0E6;
  --charcoal: #21211E;
  --charcoal-2: #57564F;
  --charcoal-3: #8A887F;
  --line: #E9E4D8;
  --mint-1: #8BEBC2;
  --mint-2: #3ED89E;
  --mint-3: #12B981;
  --mint-deep: #0B8F63;
  --on-mint: #0B2E22;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--charcoal);
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--mint-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 249, 244, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(233, 228, 216, 0.8);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--charcoal); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; border-radius: 9px; background: linear-gradient(135deg, #8BEBC2 0%, #3ED89E 45%, #12B981 100%); display: grid; place-items: center; }
.brand-mark span { width: 11px; height: 11px; border: 2px solid var(--on-mint); border-radius: 3px; display: block; position: relative; }
.brand-mark span::after { content: ''; position: absolute; inset: 2.5px; background: var(--on-mint); border-radius: 1.5px; }
.brand-name { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; }
.brand-name em { font-style: normal; font-weight: 500; color: var(--charcoal-2); }
.topbar-actions { display: flex; align-items: center; gap: 18px; }
.topbar-link { font-size: 14.5px; font-weight: 500; color: var(--charcoal-2); }
.topbar-link:hover { color: var(--charcoal); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: 14px; padding: 10px 20px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-dark { background: var(--charcoal); color: var(--cream); border: none; }
.btn-dark:hover { transform: translateY(-1px); text-decoration: none; }
.btn-mint {
  background: linear-gradient(135deg, #8BEBC2 0%, #3ED89E 45%, #12B981 100%);
  color: var(--on-mint); border: none;
  box-shadow: 0 10px 24px -10px rgba(18, 185, 129, 0.55);
}
.btn-mint:hover { transform: translateY(-1px); text-decoration: none; }

/* 文章头部 */
.article-hero { padding: clamp(3rem, 6vw, 5rem) 0 2rem; }
.breadcrumb { font-size: 13.5px; color: var(--charcoal-3); margin-bottom: 1.4rem; }
.breadcrumb a { color: var(--charcoal-3); }
.breadcrumb a:hover { color: var(--mint-deep); }
.article-hero h1 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  line-height: 1.3; letter-spacing: -0.01em; color: var(--charcoal);
}
.article-meta { margin-top: 1.1rem; font-size: 14px; color: var(--charcoal-3); display: flex; flex-wrap: wrap; gap: 8px 18px; }
.article-meta .tag {
  background: rgba(62, 216, 158, 0.14); color: var(--mint-deep);
  padding: 2px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
}
.article-lead { margin-top: 1.6rem; font-size: 17.5px; color: var(--charcoal-2); border-left: 3px solid var(--mint-3); padding-left: 1rem; }

/* 正文 */
.article-body { padding-bottom: 1rem; }
.article-body h2 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(1.35rem, 2.8vw, 1.7rem);
  margin: 2.6rem 0 1rem; padding-top: 0.4rem; color: var(--charcoal);
  border-bottom: 1px solid var(--line); padding-bottom: 0.7rem;
}
.article-body h3 { font-size: 1.13rem; margin: 1.9rem 0 0.7rem; color: var(--charcoal); }
.article-body p { margin: 0.9rem 0; color: var(--charcoal-2); }
.article-body ul, .article-body ol { margin: 0.9rem 0 0.9rem 1.4rem; color: var(--charcoal-2); }
.article-body li { margin: 0.4rem 0; }
.article-body strong { color: var(--charcoal); font-weight: 650; }
.article-body blockquote {
  margin: 1.2rem 0; padding: 0.8rem 1.1rem;
  background: var(--cream-2); border-radius: 14px;
  color: var(--charcoal-2); font-size: 15.5px;
}
.article-body table { width: 100%; border-collapse: collapse; margin: 1.3rem 0; font-size: 15px; }
.article-body th { text-align: left; background: var(--cream-2); color: var(--charcoal); font-weight: 650; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: 0.6rem 0.8rem; vertical-align: top; }
.article-body td { color: var(--charcoal-2); }

/* FAQ */
.faq-section { margin: 3rem 0 2rem; }
.faq-section h2 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(1.35rem, 2.8vw, 1.7rem); margin-bottom: 1.3rem; color: var(--charcoal);
}
.faq-item { border: 1px solid var(--line); border-radius: 16px; padding: 1.1rem 1.3rem; margin-bottom: 0.9rem; background: #fff; }
.faq-q { font-weight: 650; color: var(--charcoal); font-size: 16px; margin-bottom: 0.45rem; }
.faq-a { color: var(--charcoal-2); font-size: 15.5px; }

/* 作者卡片 */
.author-card {
  display: flex; gap: 1rem; align-items: flex-start;
  background: var(--cream-2); border-radius: 18px; padding: 1.4rem 1.5rem; margin: 2.2rem 0;
}
.author-avatar {
  width: 52px; height: 52px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, #8BEBC2 0%, #12B981 100%);
  display: grid; place-items: center; color: var(--on-mint);
  font-weight: 700; font-size: 18px;
}
.author-name { font-weight: 700; color: var(--charcoal); font-size: 16px; }
.author-desc { color: var(--charcoal-2); font-size: 14.5px; margin-top: 0.3rem; line-height: 1.6; }

/* 相关文章 */
.related { margin: 2.5rem 0; }
.related h2 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(1.35rem, 2.8vw, 1.7rem); margin-bottom: 1.2rem; color: var(--charcoal);
}
.related-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.related-card {
  display: block; border: 1px solid var(--line); border-radius: 16px;
  padding: 1.1rem 1.3rem; background: #fff; color: var(--charcoal);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.related-card:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -12px rgba(33, 33, 30, 0.12); text-decoration: none; }
.related-card h3 { font-size: 16px; color: var(--charcoal); margin-bottom: 0.3rem; }
.related-card p { font-size: 14px; color: var(--charcoal-3); margin: 0; }
@media (min-width: 720px) { .related-grid { grid-template-columns: 1fr 1fr; } }

/* CTA */
.cta-banner {
  margin: 3rem 0;
  background: linear-gradient(135deg, #8BEBC2 0%, #3ED89E 45%, #12B981 100%);
  border-radius: clamp(28px, 4vw, 48px);
  padding: clamp(2.2rem, 5vw, 3.4rem);
  text-align: center; color: var(--on-mint);
}
.cta-banner h2 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem); margin-bottom: 0.8rem;
}
.cta-banner p { font-size: 16px; margin-bottom: 1.4rem; opacity: 0.85; }
.btn-charcoal { background: var(--charcoal); color: var(--cream); border: none; }
.btn-charcoal:hover { transform: translateY(-1px); text-decoration: none; }

/* 页脚 */
.site-footer { border-top: 1px solid var(--line); background: rgba(244, 240, 230, 0.5); padding: 2.4rem 0 2rem; margin-top: 3rem; }
.footer-inner { display: flex; flex-direction: column; gap: 1rem; align-items: center; text-align: center; }
.footer-brand { font-weight: 700; color: var(--charcoal); font-size: 17px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: center; font-size: 14px; }
.footer-copy { font-size: 13px; color: var(--charcoal-3); }

/* 指南索引页 */
.index-hero { padding: clamp(3.5rem, 7vw, 6rem) 0 2rem; }
.index-hero h1 {
  font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif;
  font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.25; color: var(--charcoal);
}
.index-hero p { margin-top: 1rem; color: var(--charcoal-2); max-width: 640px; }
.guide-card {
  display: block; border: 1px solid var(--line); border-radius: 20px;
  padding: 1.6rem 1.7rem; margin-bottom: 1.1rem; background: #fff;
  color: var(--charcoal); transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.guide-card:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -12px rgba(33, 33, 30, 0.12); text-decoration: none; }
.guide-card h2 { font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', STSong, Georgia, serif; font-size: 1.25rem; color: var(--charcoal); }
.guide-card .guide-desc { color: var(--charcoal-2); font-size: 15px; margin-top: 0.45rem; }
.guide-card .guide-meta { display: flex; gap: 10px; margin-top: 0.8rem; }
.guide-card .tag {
  background: rgba(62, 216, 158, 0.14); color: var(--mint-deep);
  padding: 2px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
}