:root {
  --paper: #fff;
  --soft: #f2f5f9;
  --ink: #10213a;
  --muted: #45536a;
  --blue: #204eaa;
  --blue-deep: #143576;
  --line: #d4dde9;
  --night: #122747;
  --content: 1160px;
  --reading: 740px;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 22px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.8 var(--sans); }
::selection { color: #fff; background: var(--blue-deep); }
img { display: block; max-width: 100%; }
a { color: var(--blue-deep); text-underline-offset: .19em; }
a:hover { color: var(--blue); }
:focus-visible { outline: 3px solid #4b75c8; outline-offset: 4px; }
.skip-link { position: absolute; left: 12px; top: 12px; z-index: 10; padding: 8px 14px; background: var(--paper); transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.container { width: min(var(--content), calc(100% - 64px)); margin-inline: auto; }
.reading { width: min(var(--reading), calc(100% - 64px)); margin-inline: auto; }
.muted { color: var(--muted); }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 78px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; object-fit: contain; }
.brand-lines { display: grid; line-height: 1.3; }
.brand-lines strong { font-size: 13px; letter-spacing: .04em; }
.brand-lines span { margin-top: 4px; color: var(--muted); font-size: 12px; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 clamp(14px, 2.1vw, 28px); align-items: center; }
.site-nav a { padding: 23px 0 21px; min-height: 44px; color: var(--ink); border-bottom: 2px solid transparent; text-decoration: none; font-size: 14px; font-weight: 650; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--blue-deep); border-color: var(--blue); }
.site-nav a:last-child { padding-inline: 16px; }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: inherit; line-height: 1.23; text-wrap: balance; }
h1 { font-size: clamp(36px, 4.9vw, 64px); font-weight: 750; letter-spacing: -.035em; margin-bottom: 22px; }
h2 { font-size: clamp(27px, 3vw, 40px); letter-spacing: -.025em; margin-bottom: 16px; }
h3 { font-size: clamp(19px, 2vw, 25px); letter-spacing: -.016em; margin-bottom: 10px; }
p { margin-bottom: 16px; }
.home-hero { background: var(--soft); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.08fr 1fr; align-items: center; gap: clamp(28px, 5.5vw, 80px); padding-block: clamp(56px, 7vw, 100px); }
.hero-copy p { max-width: 32em; color: var(--muted); font-size: clamp(17px, 1.55vw, 20px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 25px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 10px 19px; min-height: 48px; border: 1px solid var(--blue); border-radius: 4px; font-weight: 700; line-height: 1.5; text-decoration: none; transition: background .18s ease-out, border-color .18s ease-out; }
.button-primary { background: var(--blue); color: #fff; }
.button-primary:hover { background: var(--blue-deep); color: #fff; }
.button-outline { color: var(--blue-deep); background: var(--paper); }
.button-outline:hover { color: var(--blue-deep); background: #e5edf9; }
.channel-frame { margin: 0; min-width: 0; background: var(--night); color: #fff; }
.channel-frame img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: center 58%; }
.channel-frame figcaption { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 13px 18px; }
.channel-frame strong, .channel-frame span { display: block; }
.channel-frame span { font-size: 13px; color: #d7e4f7; }
.channel-frame a { color: #fff; font-size: 14px; font-weight: 700; flex-shrink: 0; padding-block: 8px; }

.section { padding-block: clamp(48px, 6vw, 82px); }
.section.compact { padding-top: clamp(34px, 5vw, 60px); }
.section-soft { background: var(--soft); }
.section-dark, .cta-band { background: var(--night); color: #fff; }
.section-head { max-width: 48em; margin-bottom: clamp(22px, 4vw, 38px); }
.section-head p, .format-grid p, .story p, .three-col p { color: var(--muted); }
.section-dark .section-head p { color: #d7e4f7; }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(25px, 6vw, 84px); align-items: center; }
.split img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; }
.format-grid, .story-grid, .three-col { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 36px); }
.format-grid article, .three-col > * { padding-top: 20px; border-top: 1px solid var(--line); }
.format-grid article { display: flex; flex-direction: column; align-items: flex-start; }
.format-grid .text-link { margin-top: auto; }
.text-link { display: inline-block; padding-block: 7px; color: var(--blue-deep); font-weight: 700; }
.more-space { margin-top: 20px; }
.steps { padding: 0; margin: 0; counter-reset: steps; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 36px minmax(0, 1fr); column-gap: 12px; padding-block: 15px; border-bottom: 1px solid var(--line); }
.steps li::before { counter-increment: steps; content: counter(steps, decimal-leading-zero); grid-row: span 2; color: var(--blue-deep); font-size: 14px; font-weight: 700; font-variant-numeric: tabular-nums; }
.steps li span { grid-column: 2; color: var(--muted); }
.story { min-width: 0; }
.story img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.story h3 { margin-top: 15px; }
.story-link { display: block; color: var(--ink); text-decoration: none; }
.story-link:hover h3 { text-decoration: underline; text-underline-offset: 4px; }
.cta-band { padding-block: 48px; }
.cta-band-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.cta-band h2 { margin-bottom: 8px; }
.cta-band p { margin-bottom: 0; color: #d7e4f7; }
.cta-band .button-primary { flex-shrink: 0; background: #fff; border-color: #fff; color: var(--blue-deep); }
.cta-band .button-primary:hover { background: #e3ecfb; border-color: #e3ecfb; }

.site-footer { padding: 44px 0 25px; background: var(--soft); border-top: 1px solid var(--line); font-size: 14px; }
.footer-main { display: flex; justify-content: space-between; gap: 32px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.footer-main strong { font-size: 13px; letter-spacing: .035em; }
.footer-main p { margin: 7px 0 0; color: var(--muted); }
.footer-links { display: flex; align-content: start; flex-wrap: wrap; gap: 8px 19px; max-width: 485px; }
.footer-links a { color: var(--ink); }
.footer-bottom { padding-top: 15px; color: var(--muted); }
.page-hero { padding-block: clamp(46px, 7vw, 82px); background: var(--soft); border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 16em; }
.page-hero p { max-width: 43em; margin-bottom: 0; color: var(--muted); font-size: 18px; }
.films-hero { padding-block: 43px 30px; }
.page-hero-image { width: 100%; max-height: 380px; object-fit: cover; }
.intro-copy { font-size: 18px; }
.article-meta, .archive-hero .meta { display: flex; flex-wrap: wrap; gap: 6px 17px; margin-top: 18px; color: var(--muted); font-size: 14px; }
.article-layout, .service-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(175px, 230px); gap: clamp(28px, 6vw, 78px); align-items: start; }
.service-layout { grid-template-columns: minmax(175px, 230px) minmax(0, 1fr); }
.article-body, .service-content, .policy-main { max-width: var(--reading); font-size: 17px; line-height: 1.9; overflow-wrap: anywhere; }
.article-body h2, .policy-main h2 { margin-top: 44px; font-size: clamp(24px, 2.8vw, 33px); }
.article-body > h2:first-child, .policy-main > h2:first-child { margin-top: 0; }
.article-body h3 { margin-top: 27px; }
.article-body li, .policy-main li { margin-bottom: 8px; }
.article-aside { position: sticky; top: 22px; border-top: 1px solid var(--line); padding-top: 12px; font-size: 14px; }
.article-aside strong, .article-aside a { display: block; }
.article-aside a { padding-block: 5px; }
.note { padding: 14px 17px; background: var(--soft); border-top: 1px solid var(--line); }
.video-link { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 24px 0; padding: 15px 18px; background: var(--soft); }
.source-list { padding-left: 23px; }
.author-note, .related-reading, .archive-main .more { margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); }
.author-note p { font-size: 15px; color: var(--muted); }
.policy-main { width: min(var(--reading), calc(100% - 64px)); margin: auto; padding-block: 45px 68px; }
.eyebrow { font-size: 14px; font-weight: 650; color: var(--muted); }
.rule-list { border-top: 1px solid var(--line); }
.rule-item { display: grid; grid-template-columns: 45px 1fr; gap: 16px; padding-block: 18px; border-bottom: 1px solid var(--line); }
.rule-no { color: var(--blue-deep); font-variant-numeric: tabular-nums; font-weight: 700; }
.service-content article + article { margin-top: 36px; padding-top: 30px; border-top: 1px solid var(--line); }
.placement { margin: 18px 0; padding: 12px 15px 15px; background: var(--soft); }
.placement figcaption { color: var(--muted); font-size: 13px; }
.placement ol { display: grid; grid-template-columns: 1fr 1.15fr 1fr; align-items: stretch; gap: 4px; margin: 8px 0 0; padding: 0; list-style: none; }
.placement li { display: grid; place-content: center; padding: 9px 5px; background: #e1e8f3; text-align: center; font-size: 14px; line-height: 1.4; }
.placement li:nth-child(2) { background: var(--blue-deep); color: #fff; }
.faq { max-width: var(--reading); border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding-block: 14px; cursor: pointer; font-weight: 700; }
.faq summary:hover { color: var(--blue-deep); }
.faq details p { color: var(--muted); padding-inline-start: 18px; }
.contact-grid { align-items: start; }
.email-link { font-size: clamp(17px, 2.3vw, 24px); font-weight: 700; overflow-wrap: anywhere; }
.brief { padding: clamp(18px, 4vw, 32px); background: var(--soft); border-top: 1px solid var(--line); }
.brief ul { margin-bottom: 0; padding-left: 22px; }
.brief li + li { margin-top: 5px; }
.archive-hero .breadcrumb { font-size: 14px; margin-bottom: 12px; }
.archive-main { max-width: var(--reading); padding-block: 36px 65px; }
.archive-main .card { padding-block: 17px; border-bottom: 1px solid var(--line); }
.archive-main .card h2, .archive-main .article h2 { font-size: clamp(24px, 2.8vw, 33px); }
.archive-main .article h2 { margin-top: 36px; }
.archive-main .check { padding: 9px 0; border-bottom: 1px solid var(--line); }

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; gap: 0 20px; padding-top: 10px; }
  .site-nav a { padding-block: 10px; }
  .site-nav a:last-child { padding-inline: 0; }
}
@media (max-width: 720px) {
  .container, .reading, .policy-main { width: calc(100% - 36px); }
  .header-inner { display: block; }
  .site-nav { justify-content: space-between; gap: 0 12px; }
  .site-nav a { font-size: 13px; }
  .hero-grid, .split, .format-grid, .story-grid, .three-col, .service-layout, .article-layout { grid-template-columns: 1fr; }
  .hero-grid { padding-block: 36px 42px; gap: 26px; }
  .hero-copy h1 { font-size: clamp(28px, 8.8vw, 40px); }
  .format-grid { gap: 21px; }
  .story-grid { gap: 26px; }
  .story img { aspect-ratio: 2 / 1; }
  .article-aside { position: static; grid-row: 1; }
  .article-aside a { display: inline-block; margin-inline-end: 14px; }
  .cta-band-inner, .footer-main { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 375px) {
  .site-nav { justify-content: flex-start; }
  .actions .button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}