:root {
  color-scheme: dark;
  --insights-bg: #050505;
  --insights-surface: #111113;
  --insights-surface-soft: #18181b;
  --insights-line: rgba(255,255,255,.11);
  --insights-line-strong: rgba(255,255,255,.2);
  --insights-text: #f5f5f7;
  --insights-secondary: #c7c7cc;
  --insights-muted: #8e8e93;
  --insights-accent: #0a84ff;
  --insights-accent-soft: rgba(10,132,255,.13);
  --insights-green: #34c759;
  --insights-max: 1280px;
  font-synthesis: none;
  line-break: strict;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--insights-bg);
  color: var(--insights-text);
  font-family: -apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.insights-shell { width: min(var(--insights-max),calc(100% - 48px)); margin: 0 auto; }
.insights-kicker { color: var(--insights-accent); font-size: 12px; font-weight: 760; letter-spacing: .14em; text-transform: uppercase; }
.insights-muted { color: var(--insights-muted); }

.insights-hero {
  min-height: 430px;
  padding: 132px 0 58px;
  border-bottom: 1px solid var(--insights-line);
}
.insights-hero-grid { display: grid; grid-template-columns: minmax(0,1.45fr) minmax(300px,.7fr); gap: 72px; align-items: end; }
.insights-hero h1 { max-width: 850px; margin: 15px 0 24px; font-size: clamp(46px,6vw,78px); line-height: 1.06; letter-spacing: -.045em; text-wrap: balance; }
.insights-hero-copy { max-width: 780px; margin: 0; color: var(--insights-secondary); font-size: clamp(18px,2vw,22px); line-height: 1.75; text-wrap: pretty; }
.insights-hero-aside { padding-bottom: 8px; color: var(--insights-secondary); font-size: 16px; }
.insights-hero-aside strong { display: block; margin-bottom: 9px; color: #fff; font-size: 18px; }

.insights-topic-bar { position: sticky; top: 56px; z-index: 30; border-bottom: 1px solid var(--insights-line); background: rgba(5,5,5,.93); backdrop-filter: blur(14px); }
.insights-topic-inner { width: min(var(--insights-max),calc(100% - 48px)); margin: auto; padding: 14px 0; display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.insights-topic-inner::-webkit-scrollbar { display: none; }
.insights-filter { flex: 0 0 auto; min-height: 42px; padding: 8px 15px; border: 1px solid var(--insights-line); border-radius: 999px; color: var(--insights-secondary); background: transparent; cursor: pointer; transition: border-color .2s ease,color .2s ease,background .2s ease; }
.insights-filter:hover,.insights-filter:focus-visible,.insights-filter.active { border-color: rgba(10,132,255,.65); color: #fff; background: var(--insights-accent-soft); outline: none; }

.insights-main { padding: 46px 0 110px; }
.insights-section-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 22px; }
.insights-section-heading h2 { margin: 6px 0 0; font-size: clamp(28px,3vw,42px); line-height: 1.2; letter-spacing: -.03em; }
.insights-section-heading p { max-width: 540px; margin: 0; color: var(--insights-muted); }

.insights-featured { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(300px,.65fr); min-height: 390px; margin-bottom: 64px; border: 1px solid var(--insights-line); border-radius: 24px; overflow: hidden; background: var(--insights-surface); }
.insights-featured-main { padding: clamp(30px,4vw,56px); display: flex; flex-direction: column; justify-content: space-between; }
.insights-featured h2 { max-width: 780px; margin: 14px 0 18px; font-size: clamp(34px,4vw,54px); line-height: 1.16; letter-spacing: -.035em; text-wrap: balance; }
.insights-featured p { max-width: 760px; margin: 0; color: var(--insights-secondary); font-size: 17px; }
.insights-read-link { display: inline-flex; align-items: center; gap: 9px; margin-top: 32px; color: #fff; font-weight: 700; }
.insights-read-link::after { content: "→"; color: var(--insights-accent); transition: transform .2s ease; }
.insights-read-link:hover::after { transform: translateX(4px); }
.insights-featured-path { padding: 34px; border-left: 1px solid var(--insights-line); background: #0b0b0c; }
.insights-featured-path h3 { margin: 8px 0 24px; font-size: 18px; }
.insights-path-list { margin: 0; padding: 0; list-style: none; }
.insights-path-list li { padding: 15px 0; border-top: 1px solid var(--insights-line); color: var(--insights-secondary); }
.insights-path-list span { display: block; color: var(--insights-accent); font-size: 11px; font-weight: 760; letter-spacing: .12em; }

.insights-catalog { display: grid; grid-template-columns: 260px minmax(0,1fr); gap: 34px; }
.insights-category-index { position: sticky; top: 126px; align-self: start; }
.insights-category-index h2 { margin: 8px 0 16px; font-size: 24px; }
.insights-category-index p { margin: 0 0 22px; color: var(--insights-muted); font-size: 14px; }
.insights-category-links { display: grid; }
.insights-category-links a { padding: 12px 0; border-top: 1px solid var(--insights-line); color: var(--insights-secondary); font-size: 14px; }
.insights-category-links a:hover { color: #fff; }

.insights-groups { display: grid; gap: 44px; }
.insights-group[hidden],.insights-card[hidden] { display: none; }
.insights-group-header { display: grid; grid-template-columns: 180px 1fr; gap: 26px; margin-bottom: 10px; }
.insights-group-header h2 { margin: 0; font-size: 22px; }
.insights-group-header p { margin: 0; color: var(--insights-muted); font-size: 14px; }
.insights-list { border-top: 1px solid var(--insights-line); }
.insights-card { display: grid; grid-template-columns: 180px minmax(0,1fr) auto; gap: 26px; padding: 26px 0; border-bottom: 1px solid var(--insights-line); transition: background .2s ease; }
.insights-card:hover { background: linear-gradient(90deg,transparent,rgba(255,255,255,.025),transparent); }
.insights-card-meta { color: var(--insights-muted); font-size: 12px; }
.insights-card-meta strong { display: block; margin-bottom: 4px; color: var(--insights-accent); font-size: 12px; }
.insights-card h3 { margin: 0 0 8px; font-size: clamp(20px,2vw,27px); line-height: 1.35; letter-spacing: -.02em; text-wrap: balance; }
.insights-card p { max-width: 760px; margin: 0; color: var(--insights-muted); font-size: 15px; line-height: 1.7; text-wrap: pretty; }
.insights-card-arrow { padding-top: 3px; color: var(--insights-accent); font-size: 22px; }
.insights-empty { display: none; padding: 46px 0; color: var(--insights-muted); }
.insights-empty.visible { display: block; }

.article-hero { padding: 116px 0 54px; border-bottom: 1px solid var(--insights-line); }
.article-breadcrumbs { margin-bottom: 38px; color: var(--insights-muted); font-size: 13px; }
.article-breadcrumbs a:hover { color: #fff; }
.article-hero-grid { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 70px; align-items: end; }
.article-hero h1 { max-width: 920px; margin: 14px 0 22px; font-size: clamp(40px,5.4vw,68px); line-height: 1.13; letter-spacing: -.042em; text-wrap: balance; }
.article-direct-answer { max-width: 850px; margin: 0; color: var(--insights-secondary); font-size: clamp(18px,2vw,22px); line-height: 1.78; text-wrap: pretty; }
.article-meta { padding-left: 24px; border-left: 1px solid var(--insights-line); color: var(--insights-muted); font-size: 13px; }
.article-meta strong { display: block; margin-bottom: 10px; color: #fff; font-size: 15px; }
.article-meta span { display: block; margin-top: 7px; }

.article-layout { width: min(1120px,calc(100% - 48px)); margin: 0 auto; padding: 54px 0 110px; display: grid; grid-template-columns: 220px minmax(0,720px); justify-content: center; gap: 70px; }
.article-toc { position: sticky; top: 94px; align-self: start; }
.article-toc strong { display: block; margin-bottom: 14px; font-size: 13px; }
.article-toc a { display: block; padding: 8px 0; color: var(--insights-muted); font-size: 13px; line-height: 1.5; }
.article-toc a:hover { color: #fff; }
.article-body { min-width: 0; }
.article-section { padding: 0 0 48px; margin-bottom: 48px; border-bottom: 1px solid var(--insights-line); }
.article-section:last-of-type { margin-bottom: 0; }
.article-section h2 { margin: 0 0 22px; font-size: clamp(27px,3vw,38px); line-height: 1.3; letter-spacing: -.025em; text-wrap: balance; }
.article-section p { margin: 0 0 20px; color: var(--insights-secondary); font-size: 18px; line-height: 1.9; text-wrap: pretty; }
.article-checklist { margin: 24px 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.article-checklist li { position: relative; padding: 15px 18px 15px 44px; border: 1px solid var(--insights-line); border-radius: 14px; background: var(--insights-surface); color: var(--insights-secondary); font-size: 16px; }
.article-checklist li::before { content: ""; position: absolute; left: 18px; top: 22px; width: 8px; height: 8px; border-radius: 50%; background: var(--insights-accent); box-shadow: 0 0 0 5px var(--insights-accent-soft); }
.article-callout { margin: 28px 0; padding: 20px 22px; border-left: 3px solid var(--insights-accent); border-radius: 0 14px 14px 0; background: var(--insights-accent-soft); color: #dbeafe; font-size: 16px; }
.article-sources { padding-top: 4px; }
.article-sources h2,.article-related h2 { margin: 0 0 20px; font-size: 26px; }
.article-sources ul { margin: 0; padding-left: 20px; }
.article-sources li { margin: 9px 0; color: var(--insights-secondary); }
.article-sources a { color: #69adff; text-decoration: underline; text-underline-offset: 3px; }
.article-related { margin-top: 48px; }
.article-related-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.article-related-card { padding: 20px; border: 1px solid var(--insights-line); border-radius: 16px; background: var(--insights-surface); }
.article-related-card:hover { border-color: rgba(10,132,255,.55); }
.article-related-card span { color: var(--insights-accent); font-size: 11px; font-weight: 760; letter-spacing: .1em; }
.article-related-card h3 { margin: 9px 0 0; font-size: 17px; line-height: 1.5; }
.article-cta { margin-top: 48px; padding: 36px; border-radius: 22px; background: #f5f5f7; color: #111; }
.article-cta h2 { margin: 0 0 10px; font-size: 28px; }
.article-cta p { margin: 0 0 22px; color: #53535a; }
.article-cta button { padding: 10px 18px; border: 0; border-radius: 999px; background: #111; color: #fff; font-weight: 700; cursor: pointer; }

.insights-footer { border-top: 1px solid var(--insights-line); }
.insights-footer-inner { width: min(var(--insights-max),calc(100% - 48px)); margin: auto; padding: 32px 0; display: flex; justify-content: space-between; gap: 24px; color: var(--insights-muted); font-size: 13px; }

.modal { position: fixed; inset: 0; z-index: 100; display: none; place-items: center; padding: 24px; background: rgba(0,0,0,.76); }
.modal.open { display: grid; }
.modal-card { position: relative; width: min(410px,100%); padding: 30px; border: 1px solid var(--insights-line); border-radius: 22px; background: #151517; text-align: center; }
.modal-card h2 { margin: 10px 0 8px; font-size: 28px; }
.modal-card p { margin: 0; color: var(--insights-secondary); }
.modal-card img { width: 210px; height: 210px; margin: 18px auto; border-radius: 14px; background: #fff; object-fit: cover; }
.modal-card a { color: #69adff; }
.modal-close { position: absolute; top: 12px; right: 14px; border: 0; color: #aaa; background: transparent; font-size: 25px; cursor: pointer; }

@media (max-width: 1120px) {
  .insights-hero-grid,.article-hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .insights-hero { min-height: auto; }
  .insights-featured { grid-template-columns: 1fr; }
  .insights-featured-path { border-top: 1px solid var(--insights-line); border-left: 0; }
  .article-meta { padding: 0; border-left: 0; }
}

@media (max-width: 820px) {
  .insights-shell,.insights-topic-inner,.article-layout,.insights-footer-inner { width: min(100% - 32px,var(--insights-max)); }
  .insights-hero { padding-top: 104px; }
  .insights-catalog { grid-template-columns: 1fr; }
  .insights-category-index { position: static; }
  .insights-category-links { display: none; }
  .insights-group-header,.insights-card { grid-template-columns: 1fr auto; gap: 8px 18px; }
  .insights-group-header p,.insights-card-copy { grid-column: 1 / -1; }
  .insights-card-meta { grid-column: 1; }
  .insights-card-arrow { grid-column: 2; grid-row: 1; }
  .article-layout { grid-template-columns: 1fr; gap: 26px; }
  .article-toc { position: static; padding: 18px; border: 1px solid var(--insights-line); border-radius: 14px; background: var(--insights-surface); }
  .article-related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .insights-hero h1 { font-size: 42px; }
  .insights-main { padding-top: 30px; }
  .insights-section-heading { align-items: start; flex-direction: column; }
  .insights-featured-main,.insights-featured-path { padding: 24px; }
  .insights-featured h2 { font-size: 32px; }
  .article-hero { padding-top: 96px; }
  .article-hero h1 { font-size: 37px; }
  .article-section p { font-size: 17px; line-height: 1.85; }
  .article-cta { padding: 28px 22px; }
  .insights-footer-inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}