/* =========================================================
   洞察栏目（列表 / 文章 / 分类）
   ========================================================= */

/* ---------- Shared ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 20px;
  font-size: .76rem;
  color: rgba(186, 216, 255, .5);
}
.breadcrumb a { transition: color .2s ease; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span:last-child { color: rgba(226, 240, 255, .85); }

.insights-page .hero-grid { opacity: .55; }

/* ---------- Hub hero ---------- */
.insights-hero {
  padding: calc(var(--header-h) + 68px) 0 76px;
}
.insights-hero-inner { max-width: 860px; }
.insights-hero h1 {
  margin: 18px 0 0;
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  font-weight: 780;
  color: #fff;
}
.insights-hero .hero-lead { max-width: 700px; margin-top: 20px; }


/* 浅色页首时的白色导航 */
.insights-page.insights-light .site-header {
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px -22px rgba(14, 23, 40, .4);
  color: var(--ink);
}
.insights-page.insights-light .nav-cta {
  border-color: transparent;
  background: linear-gradient(120deg, var(--brand), #0ea5e9);
  color: #fff;
  box-shadow: 0 10px 22px -12px rgba(37, 99, 235, .8);
}

/* ---------- Layout ---------- */
.insights-main { padding: clamp(48px, 6vw, 80px) 0 clamp(64px, 7vw, 96px); }
.insights-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(36px, 5vw, 64px);
  align-items: start;
}

/* ---------- Article list ---------- */
.insight-item {
  padding: 30px 0 34px;
  border-top: 1px solid var(--line);
}
.insight-item:first-child { padding-top: 0; border-top: 0; }
.insight-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--muted-light);
}
.insight-cat {
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(37, 99, 235, .08);
  color: #2f5fc4;
  font-family: var(--font);
  font-size: .7rem;
  letter-spacing: .02em;
}
.insight-item h2 {
  margin-bottom: 12px;
  font-size: clamp(1.28rem, 2vw, 1.55rem);
  line-height: 1.5;
  letter-spacing: -.01em;
  font-weight: 700;
}
.insight-item h2 a { transition: color .2s ease; }
.insight-item h2 a:hover { color: var(--brand); }
.insight-item > p {
  max-width: 720px;
  font-size: .94rem;
  line-height: 1.9;
  color: var(--muted);
}
.insight-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 20px;
}
.insight-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.insight-tags span {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: .7rem;
  color: var(--muted-light);
}
.insight-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .84rem;
  font-weight: 600;
  color: var(--brand);
}
.insight-more svg { width: 16px; height: 16px; transition: transform .25s ease; }
.insight-item:hover .insight-more svg { transform: translateX(3px); }

.insights-empty {
  padding: 48px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.9;
}

/* ---------- Sidebar ---------- */
.insights-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.side-block {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #f8faff;
}
.side-block + .side-block { margin-top: 18px; }
.side-block h3 {
  margin-bottom: 14px;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--ink);
}
.side-cats { display: flex; flex-direction: column; gap: 2px; }
.side-cats a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  font-size: .88rem;
  color: var(--muted);
  border-bottom: 1px dashed rgba(37, 99, 235, .12);
}
.side-cats a:last-child { border-bottom: 0; }
.side-cats a:hover { color: var(--brand); }
.side-cats em {
  font-style: normal;
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--muted-light);
}
.side-block p {
  font-size: .84rem;
  line-height: 1.8;
  color: var(--muted);
}
.side-block p + p { margin-top: 8px; }
.side-block a.side-link { color: var(--brand); }
.side-block a.side-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Article ---------- */
.article-hero {
  padding: calc(var(--header-h) + 64px) 0 42px;
  background: #fff;
}
.article-hero .breadcrumb { color: var(--muted-light); }
.article-hero .breadcrumb a:hover { color: var(--brand); }
.article-hero .breadcrumb span:last-child { color: var(--muted); }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--muted-light);
}
.article-hero h1 {
  max-width: 900px;
  font-size: clamp(1.85rem, 3.3vw, 2.7rem);
  line-height: 1.38;
  letter-spacing: -.02em;
  font-weight: 760;
}
.article-summary {
  max-width: 780px;
  margin-top: 18px;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted);
}
.article-body-wrap { padding: 12px 0 clamp(64px, 7vw, 96px); }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(36px, 5vw, 64px);
  align-items: start;
}
.article-body {
  max-width: 780px;
  font-size: 1.01rem;
  line-height: 2;
  color: #2a3548;
}
.article-body h2 {
  margin: 2.4em 0 .8em;
  font-size: 1.32rem;
  line-height: 1.5;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--ink);
}
.article-body h2:first-child { margin-top: 0; }
.article-body p { margin: 0 0 1.2em; }
.article-body ul { margin: 0 0 1.4em; padding-left: 1.2em; list-style: disc; }
.article-body li { margin: 6px 0; }
.article-body li::marker { color: var(--brand); }

.article-takeaway {
  margin: 2.4em 0 0;
  padding: 24px 26px;
  border: 1px solid rgba(37, 99, 235, .16);
  border-left: 3px solid var(--brand);
  border-radius: 0 14px 14px 0;
  background: #f6f9ff;
}
.article-takeaway strong {
  display: block;
  margin-bottom: 8px;
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--brand);
}
.article-takeaway p { margin: 0; font-size: .94rem; line-height: 1.85; color: var(--muted); }

.article-aside { position: sticky; top: calc(var(--header-h) + 24px); }
.article-aside .side-block h3 { margin-bottom: 10px; }
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 18px;
  font-size: .84rem;
  color: var(--muted);
}
.article-back:hover { color: var(--brand); }
.article-back svg { width: 15px; height: 15px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.article-tags span {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: .72rem;
  color: var(--muted-light);
}
.article-cta {
  margin-top: 18px;
  padding: 24px;
  border-radius: 18px;
  background:
    radial-gradient(300px 200px at 100% 0%, rgba(37, 99, 235, .4), transparent 65%),
    #0a1424;
  color: #fff;
}
.article-cta h3 { margin-bottom: 8px; font-size: .98rem; }
.article-cta p { font-size: .8rem; line-height: 1.75; color: rgba(203, 219, 240, .68); }
.article-cta a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: .82rem;
  font-weight: 600;
  color: #7dd3fc;
}
.article-cta a:hover { color: #fff; }
.article-cta svg { width: 15px; height: 15px; }

/* ---------- Category ---------- */
.category-hero { padding: calc(var(--header-h) + 64px) 0 44px; background: #fff; }
.category-hero .breadcrumb { color: var(--muted-light); }
.category-hero .breadcrumb a:hover { color: var(--brand); }
.category-hero h1 { font-size: clamp(1.9rem, 3vw, 2.5rem); letter-spacing: -.02em; }
.category-hero p { max-width: 680px; margin-top: 14px; color: var(--muted); line-height: 1.9; }
.category-hero .insight-cat { margin-bottom: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .insights-layout,
  .article-layout { grid-template-columns: 1fr; }
  .insights-side,
  .article-aside { position: static; }
  .article-aside .side-block:first-child { margin-top: 0; }
}

@media (max-width: 560px) {
  .insights-hero { padding: calc(var(--header-h) + 48px) 0 60px; }
  .insight-item { padding: 26px 0 28px; }
  .insight-foot { align-items: flex-start; }
  .side-block { padding: 22px 20px; }
}