@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap');

:root {
  --ink: #00123d;
  --ink-soft: #4f6073;
  --blue: #0878b8;
  --blue-bright: #12a7e8;
  --paper: #f7f9fc;
  --white: #ffffff;
  --line: #dfe5ec;
  --line-strong: #c4ced8;
  --font-display: 'Manrope', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Microsoft YaHei', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: #1a1c1e;
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(0, 18, 61, 0.07);
  background: rgba(247, 249, 252, 0.92);
  backdrop-filter: blur(18px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  min-height: 70px;
  margin: 0 auto;
  padding: 12px 32px;
}
.site-brand { display: flex; align-items: center; gap: 8px; }
.site-brand__mark { width: 38px; height: 38px; object-fit: contain; }
.site-brand__copy { display: flex; flex-direction: column; gap: 1px; color: var(--ink-soft); font-size: 12px; line-height: 1.1; }
.site-brand__wordmark { width: 156px; height: auto; }
.site-header__links { display: flex; align-items: center; gap: 30px; }
.site-header__links a { position: relative; padding: 9px 0; color: var(--ink-soft); font-size: 15px; font-weight: 600; }
.site-header__links a::after { position: absolute; right: 0; bottom: 0; left: 0; height: 2px; background: var(--ink); content: ''; transform: scaleX(0); transition: transform .2s ease; }
.site-header__links a:hover, .site-header__links a.is-active { color: var(--ink); }
.site-header__links a:hover::after, .site-header__links a.is-active::after { transform: scaleX(1); }
.site-header__cta { padding: 11px 20px; border-radius: 8px; background: linear-gradient(135deg, var(--ink), #083b73); color: #fff; font-size: 14px; font-weight: 700; }

.eyebrow { display: inline-block; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }

.insights-hero {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 18%, rgba(18, 167, 232, .17), transparent 28%),
    linear-gradient(135deg, #fff 0%, #f2f7fb 56%, #e8f3fa 100%);
}
.insights-hero__inner { max-width: 1240px; margin: 0 auto; padding: 104px 32px 96px; }
.insights-hero h1 { max-width: 760px; margin: 12px 0 18px; color: var(--ink); font-family: var(--font-display); font-size: clamp(48px, 6vw, 82px); line-height: 1.03; letter-spacing: -.045em; }
.insights-hero p { max-width: 680px; margin: 0; color: var(--ink-soft); font-size: 19px; }
.insights-shell, .article-shell { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

.topic-map { display: grid; grid-template-columns: .85fr 1.65fr; gap: 64px; padding: 80px 0; border-bottom: 1px solid var(--line); }
.topic-map h2, .section-heading h2, .related-links h2 { margin: 8px 0 0; color: var(--ink); font-family: var(--font-display); font-size: 34px; line-height: 1.2; letter-spacing: -.025em; }
.topic-map__items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.topic-map__items a { display: grid; grid-template-columns: 38px 1fr; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.62); transition: border-color .2s ease, transform .2s ease, background .2s ease; }
.topic-map__items a:hover { border-color: #7fbfe0; background: #fff; transform: translateY(-2px); }
.topic-map__items span { grid-row: 1 / span 2; color: var(--blue); font-size: 12px; font-weight: 800; }
.topic-map__items strong { color: var(--ink); font-family: var(--font-display); font-size: 17px; }
.topic-map__items small { color: var(--ink-soft); font-size: 13px; }

.insight-list { padding: 80px 0 104px; }
.section-heading { margin-bottom: 32px; }
.insight-empty { padding: 64px; border: 1px dashed var(--line-strong); border-radius: 24px; background: rgba(255,255,255,.66); text-align: center; }
.insight-empty h3 { margin: 12px 0; color: var(--ink); font-family: var(--font-display); font-size: 28px; }
.insight-empty p { max-width: 680px; margin: 0 auto 24px; color: var(--ink-soft); }
.insight-card { display: grid; grid-template-columns: 1.2fr 1fr; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--white); box-shadow: 0 24px 70px rgba(0, 18, 61, .08); }
.insight-card__image { min-height: 410px; overflow: hidden; }
.insight-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.insight-card:hover .insight-card__image img { transform: scale(1.025); }
.insight-card__body { display: flex; flex-direction: column; justify-content: center; padding: 52px; }
.insight-card__meta { display: flex; gap: 16px; color: var(--ink-soft); font-size: 13px; }
.insight-card__meta span { color: var(--blue); font-weight: 700; }
.insight-card h2 { margin: 16px 0 18px; color: var(--ink); font-family: var(--font-display); font-size: 34px; line-height: 1.25; letter-spacing: -.025em; }
.insight-card h2 a:hover { color: var(--blue); }
.insight-card p { margin: 0 0 24px; color: var(--ink-soft); font-size: 16px; }
.text-link { align-self: flex-start; color: var(--ink); font-weight: 800; }
.text-link span { display: inline-block; margin-left: 6px; transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

.breadcrumbs { display: flex; align-items: center; gap: 9px; padding: 26px 0 14px; color: #697987; font-size: 13px; }
.breadcrumbs a:hover { color: var(--blue); }
.article-hero { max-width: 940px; padding: 44px 0 46px; }
.article-hero h1 { margin: 13px 0 22px; color: var(--ink); font-family: var(--font-display); font-size: clamp(44px, 5vw, 68px); line-height: 1.12; letter-spacing: -.045em; }
.article-hero__summary { max-width: 840px; margin: 0; color: var(--ink-soft); font-size: 19px; line-height: 1.7; }
.article-meta { display: flex; gap: 20px; margin-top: 26px; color: #687886; font-size: 13px; }
.article-meta span + span, .article-meta time { position: relative; }
.article-meta span + span::before, .article-meta time::before { position: absolute; left: -11px; content: '·'; }
.article-cover { margin: 0; }
.article-cover img { width: 100%; height: auto; aspect-ratio: 16 / 8.7; border-radius: 24px; object-fit: cover; object-position: center; box-shadow: 0 26px 70px rgba(0,18,61,.12); }
.article-cover figcaption { padding: 10px 4px 0; color: #7b8792; font-size: 12px; text-align: right; }

.article-layout { display: grid; grid-template-columns: minmax(0, 780px) 250px; justify-content: space-between; gap: 72px; padding: 72px 0 96px; }
.article-content { min-width: 0; color: #26313a; font-size: 17px; line-height: 1.9; }
.article-content > p { margin: 0 0 24px; }
.article-content h2 { scroll-margin-top: 100px; margin: 60px 0 20px; color: var(--ink); font-family: var(--font-display); font-size: 32px; line-height: 1.3; letter-spacing: -.025em; }
.article-content h2:first-child { margin-top: 0; }
.article-content h3 { scroll-margin-top: 100px; margin: 36px 0 14px; color: #0b3359; font-family: var(--font-display); font-size: 22px; line-height: 1.4; }
.article-content strong { color: #062c52; }
.article-content a { color: #0076b5; text-decoration: underline; text-decoration-color: rgba(0,118,181,.35); text-underline-offset: 3px; }
.article-content a:hover { text-decoration-color: currentColor; }
.article-content ul, .article-content ol { margin: 0 0 26px; padding-left: 25px; }
.article-content li { margin-bottom: 8px; padding-left: 4px; }
.article-content table { width: 100%; margin: 28px 0 36px; border-spacing: 0; border-collapse: separate; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 12px; font-size: 14px; line-height: 1.55; }
.article-content th, .article-content td { padding: 14px 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-content th:last-child, .article-content td:last-child { border-right: 0; }
.article-content tr:last-child td { border-bottom: 0; }
.article-content th { background: #edf4f8; color: var(--ink); font-weight: 800; }
.article-content tr:nth-child(even) td { background: #fbfcfd; }
.article-callout { margin: 32px 0 38px; padding: 24px 26px; border-left: 4px solid var(--blue-bright); border-radius: 0 14px 14px 0; background: #edf7fc; }
.article-callout strong { display: block; margin-bottom: 5px; font-family: var(--font-display); font-size: 17px; }
.article-callout p { margin: 0; color: #3f5d70; font-size: 15px; }
.article-figure { margin: 38px 0; }
.article-figure img { width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: 16px; object-fit: cover; object-position: center; }
.article-figure figcaption { margin-top: 8px; color: #7b8792; font-size: 12px; text-align: center; }
.article-faq { scroll-margin-top: 100px; margin-top: 64px; padding-top: 2px; border-top: 1px solid var(--line); }
.article-faq__item { padding: 24px 0; border-bottom: 1px solid var(--line); }
.article-faq__item h3 { margin: 0 0 8px; }
.article-faq__item p { margin: 0; color: var(--ink-soft); }

.article-sidebar { align-self: start; position: sticky; top: 102px; display: grid; gap: 18px; }
.article-toc, .article-sidebar__card { padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.8); }
.article-toc strong { display: block; margin-bottom: 14px; color: var(--ink); font-family: var(--font-display); }
.article-toc a { display: block; padding: 8px 0; border-top: 1px solid #edf0f3; color: var(--ink-soft); font-size: 13px; line-height: 1.5; }
.article-toc a:hover { color: var(--blue); }
.article-sidebar__card { display: flex; flex-direction: column; gap: 8px; background: var(--ink); color: #fff; }
.article-sidebar__card span { color: #8ed8fb; font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.article-sidebar__card strong { font-family: var(--font-display); font-size: 19px; line-height: 1.35; }
.article-sidebar__card a { color: #bde9ff; font-size: 13px; font-weight: 700; }

.article-next-step { margin-top: 64px; padding: 36px; border-radius: 20px; background: linear-gradient(135deg, #eef8fd, #fff); box-shadow: inset 0 0 0 1px #d7e8f2; }
.article-next-step h2 { margin-top: 9px; }
.article-next-step p { margin-bottom: 24px; }
.article-next-step__links { display: flex; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 11px 18px; border-radius: 8px; font-size: 14px; font-weight: 800; text-decoration: none !important; }
.button--primary { background: var(--ink); color: #fff !important; }
.button--secondary { border: 1px solid #b8c9d5; background: #fff; color: var(--ink) !important; }

.related-links { padding: 72px 0 96px; border-top: 1px solid var(--line); }
.related-links { display: grid; grid-template-columns: .85fr 1.65fr; gap: 64px; }
.related-links__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.related-links__grid a { min-height: 154px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.related-links__grid a:hover { border-color: #8dc8e5; }
.related-links__grid span { display: block; margin-bottom: 22px; color: var(--blue); font-size: 12px; font-weight: 800; }
.related-links__grid strong { color: var(--ink); font-family: var(--font-display); font-size: 16px; line-height: 1.5; }

.site-footer { background: var(--ink); color: #fff; }
.site-footer__inner { display: grid; grid-template-columns: 1.15fr 2.8fr .9fr; gap: 56px; max-width: 1440px; margin: 0 auto; padding: 64px 32px; }
.site-footer__brand { font-family: var(--font-display); font-size: 23px; font-weight: 800; }
.site-footer p, .site-footer span, .site-footer a { color: rgba(255,255,255,.68); font-size: 13px; overflow-wrap: anywhere; }
.site-footer p { max-width: 400px; }
.site-footer__inner > div { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; min-width: 0; }
.site-footer__links { display: grid !important; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.site-footer__group { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; min-width: 0; }
.site-footer strong { margin-bottom: 8px; font-family: var(--font-display); font-size: 14px; }
.site-footer a:hover { color: #fff; }
.site-footer__language-link { color: rgba(255,255,255,.68) !important; }
.site-footer__legal { padding: 22px 32px; border-top: 1px solid rgba(255,255,255,.08); color: rgba(255,255,255,.42); font-size: 12px; text-align: center; }

@media (min-width: 768px) {
  .site-footer__contact { display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 18px; row-gap: 9px; }
  .site-footer__contact strong, .site-footer__contact a, .site-footer__contact span { grid-column: 1 / -1; }
  .site-footer__contact a { min-width: 0; white-space: normal; overflow-wrap: anywhere; font-size: 12px; }
}

@media (max-width: 1000px) {
  .site-header__links { gap: 18px; }
  .site-header__cta { display: none; }
  .topic-map, .related-links { grid-template-columns: 1fr; gap: 30px; }
  .site-footer__inner { grid-template-columns: 1fr 2fr 1.25fr; gap: 28px; }
  .site-footer__links { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }
  .article-layout { grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; }
  .insight-card__body { padding: 36px; }
}

@media (max-width: 767px) {
  .site-header__links, .site-header__cta, .article-sidebar { display: none; }
  .site-header__inner { min-height: 60px; padding: 10px 18px; }
  .insights-hero__inner, .insights-shell, .article-shell { padding-right: 18px; padding-left: 18px; }
  .insights-hero__inner { padding-top: 68px; padding-bottom: 64px; }
  .insights-hero h1 { font-size: 43px; }
  .topic-map__items, .related-links__grid { grid-template-columns: 1fr; }
  .insight-card { grid-template-columns: 1fr; }
  .insight-card__image { min-height: 230px; }
  .insight-card__body { padding: 26px; }
  .insight-empty { padding: 36px 22px; }
  .insight-card h2 { font-size: 27px; }
  .article-hero { padding: 28px 0 34px; }
  .article-hero h1 { font-size: 39px; }
  .article-meta { flex-wrap: wrap; gap: 8px 18px; }
  .article-layout { grid-template-columns: 1fr; padding-top: 42px; }
  .article-content { font-size: 16px; }
  .article-content h2 { font-size: 27px; }
  .article-content table { display: block; overflow-x: auto; white-space: nowrap; }
  .article-next-step { padding: 24px; }
  .article-next-step__links { flex-direction: column; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 30px; padding: 48px 18px; }
  .site-footer__links { display: flex !important; }
  .site-footer__language-link { display: none !important; }
}