/* ───────────── Insights (日报专栏) ─────────────
   Extends style.css tokens. Dark editorial, same voice as the main site. */

.insights-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  height: 72px; padding-inline: var(--pad);
  background: rgba(8, 9, 10, .78); backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--line);
}
.insights-nav .brand { font-size: 16px; }
.insights-nav__links { display: flex; gap: 28px; font-size: 14px; color: var(--ink-2); }
.insights-nav__links a { transition: color .3s; }
.insights-nav__links a:hover { color: var(--ink); }
.insights-nav__links a.is-active { color: var(--ink); }
.insights-nav__links a.is-active::after { content: ""; display: block; height: 2px; margin-top: 6px; background: var(--accent); }

/* List page */
.insights-hero { padding-block: clamp(72px, 12vw, 160px) clamp(40px, 6vw, 80px); }
.insights-hero h1 { font-weight: 500; font-size: clamp(40px, 7vw, 104px); line-height: 1.04; letter-spacing: -.04em; }
:lang(zh) .insights-hero h1 { letter-spacing: -.01em; }
.insights-hero h1 em { color: var(--accent); }
.insights-hero p { margin-top: 24px; max-width: 34em; color: var(--ink-2); font-size: clamp(16px, 1.3vw, 19px); line-height: 1.7; }

.post-list { border-top: 1px solid var(--line); }
.post-list a {
  display: grid; grid-template-columns: 128px 1fr auto; align-items: center; gap: clamp(18px, 3vw, 40px);
  padding: clamp(24px, 3vw, 40px) 0; border-bottom: 1px solid var(--line);
  position: relative; isolation: isolate; transition: opacity .3s;
}
.post-list a::before {
  content: ""; position: absolute; inset: 0 calc(var(--pad) * -1); z-index: -1; background: var(--bg-2);
  transform: scaleY(0); transform-origin: bottom; transition: transform .5s var(--ease);
}
.post-list a:hover::before { transform: scaleY(1); transform-origin: top; }
.post-list .post-list__date { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--ink-3); text-transform: uppercase; }
.post-list .post-list__body h2 { font-weight: 500; font-size: clamp(22px, 2.6vw, 34px); letter-spacing: -.02em; line-height: 1.2; transition: color .3s; }
:lang(zh) .post-list .post-list__body h2 { letter-spacing: 0; }
.post-list a:hover .post-list__body h2 { color: var(--accent); }
.post-list .post-list__body p { margin-top: 10px; max-width: 44em; color: var(--ink-2); font-size: 15px; line-height: 1.7; }
.post-list .post-list__arrow { color: var(--ink-3); transition: transform .5s var(--ease), color .3s; }
.post-list a:hover .post-list__arrow { transform: translateX(6px); color: var(--accent); }
@media (max-width: 720px) {
  .post-list a { grid-template-columns: 1fr; gap: 10px; }
  .post-list .post-list__arrow { display: none; }
}

/* Article page */
.article { padding-block: clamp(56px, 9vw, 120px) clamp(80px, 12vw, 160px); }
.article__wrap { max-width: 780px; margin-inline: auto; padding-inline: var(--pad); }
.article__meta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 26px; }
.article__meta .tag { color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 5px 10px; }
.article h1 { font-weight: 500; font-size: clamp(30px, 4.6vw, 56px); line-height: 1.16; letter-spacing: -.025em; margin-bottom: 20px; }
:lang(zh) .article h1 { letter-spacing: 0; }
.article .article__lede { font-size: clamp(17px, 1.4vw, 20px); line-height: 1.75; color: var(--ink-2); margin-bottom: 40px; }

.article figure { margin: clamp(36px, 5vw, 56px) 0; }
.article figure img { width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); }
.article figure figcaption { margin-top: 12px; font-size: 13px; color: var(--ink-3); line-height: 1.6; }
.article figure figcaption b { color: var(--accent); font-weight: 500; }

.article h2 { font-weight: 500; font-size: clamp(24px, 3vw, 34px); letter-spacing: -.02em; line-height: 1.3; margin: clamp(48px, 7vw, 72px) 0 20px; scroll-margin-top: 96px; }
:lang(zh) .article h2 { letter-spacing: 0; }
.article h2 .sec { color: var(--accent); font-family: var(--mono); font-size: .55em; letter-spacing: .08em; vertical-align: .35em; margin-right: .6em; }
.article h3 { font-weight: 500; font-size: 19px; margin: 34px 0 12px; letter-spacing: -.01em; }
:lang(zh) .article h3 { letter-spacing: 0; }
.article p { font-size: 16.5px; line-height: 1.9; color: var(--ink-2); margin: 16px 0; }
.article p strong, .article li strong { color: var(--ink); font-weight: 600; }
.article em { font-style: normal; color: var(--accent); font-family: inherit; }
.article ul, .article ol { margin: 18px 0; padding-left: 1.3em; color: var(--ink-2); font-size: 16px; line-height: 1.85; }
.article ul li { list-style: none; position: relative; }
.article ul li::before { content: ""; position: absolute; left: -1.1em; top: .72em; width: 6px; height: 6px; background: var(--accent); }
.article ol li { list-style: decimal; }
.article blockquote {
  margin: 28px 0; padding: 22px 26px; border-left: 2px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 12px 12px 0;
  font-size: 16.5px; line-height: 1.85; color: var(--ink);
}
.article blockquote p { color: var(--ink); margin: 0; }
.article hr { border: 0; border-top: 1px solid var(--line); margin: clamp(44px, 6vw, 64px) 0; }
.article table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: 14.5px; }
.article th, .article td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--ink-2); line-height: 1.6; }
.article th { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); font-weight: 400; }
.article td:first-child { color: var(--ink); }
.article .sources { font-size: 13.5px; line-height: 1.8; color: var(--ink-3); }
.article .sources p { font-size: inherit; color: inherit; margin: 0 0 8px; }
.article .hashtags { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }
.article .hashtags span { font-size: 12.5px; color: var(--ink-3); border: 1px solid var(--line-2); border-radius: 999px; padding: 6px 12px; }
.article .hashtags span:hover { color: var(--accent); border-color: var(--accent); }

.article-foot { border-top: 1px solid var(--line); padding-block: 40px; }
.article-foot .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
.article-foot a { color: var(--ink-2); font-size: 14px; transition: color .3s; }
.article-foot a:hover { color: var(--accent); }