body { min-height: 100vh; display: flex; flex-direction: column; }
.articles-shell { flex: 1 0 auto; max-width: 820px; margin: 0 auto; padding: 48px 20px 72px; }
.articles-intro { text-align: center; margin-bottom: 40px; }
.articles-intro .section-mark { margin-bottom: 6px; }
.articles-intro h1 { margin: 0 0 12px; font: 600 clamp(30px, 4.5vw, 44px)/1.2 var(--serif); letter-spacing: 0.04em; }
.articles-intro > p { margin: 0; color: var(--muted); font-size: 14px; }

.articles-list { display: grid; gap: 26px; }
.article-card { padding: 30px 34px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 2px 14px rgba(35, 45, 36, 0.04); }
.article-card-head h2 { margin: 0 0 10px; font: 600 23px/1.4 var(--serif); }
.article-card-head h2 a { color: inherit; text-decoration: none; }
.article-card-head h2 a:hover { color: var(--pine); }
.article-meta { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; color: var(--muted); font-size: 12px; }
.article-meta time { color: var(--muted); }
.article-cat { padding: 2px 9px; border: 1px solid #cbd8ce; border-radius: 999px; color: var(--pine); font-size: 12px; }
.article-author { color: #5f645b; }

.article-summary { margin: 14px 0 0; padding: 10px 14px; border-left: 3px solid var(--ochre); background: #faf8f2; color: #575b53; font-size: 13px; line-height: 1.75; }

.article-content { margin-top: 18px; color: #343a34; font-size: 15px; line-height: 1.95; }
.article-content p { margin: 0 0 16px; }
.article-content p:last-child { margin-bottom: 0; }

.article-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); }
.tag { padding: 3px 10px; background: #edf1e9; color: #526254; font-size: 11px; border-radius: 3px; }

.articles-empty {
  padding: 72px 24px;
  text-align: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.57);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.articles-empty::before {
  content: "文";
  display: block;
  margin: 0 auto 18px;
  font-family: var(--serif);
  font-size: 56px;
  line-height: 1;
  color: rgba(28, 88, 69, 0.14);
}

.articles-empty::after {
  content: "研习札记与专题文章，持续更新中";
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: #9a9d94;
}

@media (max-width: 640px) {
  .articles-shell { padding: 32px 14px 56px; }
  .article-card { padding: 22px 18px; }
  .article-card-head h2 { font-size: 20px; }
  .article-content { font-size: 14px; }
}