@font-face {
  font-family: Manrope;
  src: url("manrope-site.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("noto-site.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: light;
  --blue: #1455ff;
  --ink: #15223b;
  --mist: #f1f3f7;
  --ice: #d8e2ff;
  --white: #fff;
  --muted: #4d5c73;
  --line: #d6deeb;
  --side: clamp(18px, 5.6vw, 88px);
  --width: 1280px;
  font: 16px/1.75 Manrope, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--white); }
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure, ol, ul { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
main:focus { outline: none; }
.wrap { width: min(var(--width), calc(100% - 2 * var(--side))); margin-inline: auto; }
.skip {
  position: absolute; top: 8px; left: 8px; z-index: 10; padding: 8px 16px;
  background: var(--white); color: var(--blue); transform: translateY(-180%);
}
.skip:focus { transform: none; }

.top { border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 89px; }
.brand { display: block; flex: 0 0 auto; margin-inline-start: -26px; }
.brand img { width: 320px; height: auto; }
.main-nav { display: flex; gap: clamp(14px, 2.1vw, 33px); align-items: center; }
.main-nav a {
  position: relative; display: flex; align-items: center; min-height: 48px;
  white-space: nowrap; color: var(--muted); font-size: 14px; font-weight: 650;
}
.main-nav a:hover, .main-nav a[aria-current] { color: var(--blue); }
.main-nav a[aria-current]::after {
  position: absolute; right: 0; bottom: 3px; left: 0; height: 2px; background: var(--blue); content: "";
}

.eyebrow { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; line-height: 1.45; }
.with-rule { display: flex; align-items: center; gap: 12px; }
.with-rule::before { width: 28px; height: 2px; flex: 0 0 auto; content: ""; background: currentColor; }
h1, h2, h3 { font-weight: 750; }
h1 { line-height: 1.2; }
h2 { font-size: clamp(29px, 3.05vw, 44px); letter-spacing: -.037em; line-height: 1.28; text-wrap: balance; }
h3 { font-size: 21px; letter-spacing: -.025em; line-height: 1.4; }
.arrow { width: 18px; height: 18px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }
.button {
  display: inline-flex; min-height: 50px; align-items: center; gap: 24px; padding: 11px 19px;
  background: var(--blue); color: var(--white); font-size: 15px; font-weight: 750; border-radius: 4px;
}
.button:hover { background: var(--ink); }

.home-hero {
  display: grid; grid-template-columns: 1fr 1.02fr; gap: clamp(24px, 4.4vw, 64px);
  align-items: center; padding-block: 48px 56px;
}
.home-copy h1 { margin-block: 17px 18px; font-size: clamp(45px, 5.45vw, 82px); letter-spacing: -.074em; }
.home-tagline { color: var(--blue); font-size: clamp(18px, 1.65vw, 24px); font-weight: 720; }
.home-intro { max-width: 425px; margin-block: 15px 27px; color: var(--muted); }
.hero-art {
  position: relative; display: grid; grid-template-rows: auto 1fr auto; isolation: isolate;
  align-items: center; min-width: 0; min-height: 360px; aspect-ratio: 1.48; overflow: hidden;
  color: var(--white); background-color: var(--blue);
  background-image: linear-gradient(#ffffff16 1px, transparent 1px), linear-gradient(90deg, #ffffff16 1px, transparent 1px);
  background-size: 24px 24px;
}
.hero-ribbon {
  position: absolute; inset: 10% 0; z-index: -1; width: 100%; height: 80%; fill: none;
  stroke: var(--white); stroke-width: 46; opacity: .94;
}
.hero-ribbon path + path { stroke: #bcd0ff; }
.art-top, .art-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 0;
  margin-inline: 22px; font-size: clamp(9px, .91vw, 13px); letter-spacing: .10em; font-weight: 750;
}
.art-top { grid-row: 1; border-bottom: 1px solid #ffffff70; }
.art-bottom { grid-row: 3; border-top: 1px solid #ffffff70; }
.art-cross { font-size: 16px; line-height: 1; }

.services { padding-block: 28px 64px; border-top: 1px solid var(--line); }
.section-top { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 23px; }
.section-top > p { color: var(--muted); margin-bottom: 3px; }
.section-head h2 { margin-top: 9px; }
.section-head > p:not(.eyebrow) { margin-top: 12px; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 13px; }
.service-card {
  display: flex; flex-direction: column; min-height: 220px; padding: 17px 18px 16px;
  border-top: 3px solid var(--blue); background: var(--mist); transition: background-color .18s ease;
}
.service-card:hover { background: var(--ice); }
.card-top { display: flex; justify-content: space-between; align-items: start; gap: 8px; }
.card-top > span, .item-no { color: var(--blue); font-weight: 750; font-size: 12px; letter-spacing: .08em; }
.service-card h3 { margin-top: 11px; }
.service-card p { color: var(--muted); margin-block: 8px 16px; font-size: 14px; line-height: 1.7; }
.read-more { display: flex; justify-content: space-between; align-items: center; color: var(--blue); font-size: 14px; font-weight: 750; margin-top: auto; }

.work-band { background: var(--mist); border-block: 1px solid var(--line); padding-block: 61px 65px; }
.collaboration-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 31px; }
.collaboration-grid > div { border-top: 1px solid var(--line); padding-block: 13px 0; }
.collaboration-grid span { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.collaboration-grid h3 { margin-block: 7px 8px; }
.collaboration-grid p { color: var(--muted); }

.detail-top { background: var(--mist); border-bottom: 1px solid var(--line); }
.breadcrumb {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding-top: 23px;
  font-size: 13px; font-weight: 650; color: var(--muted);
}
.breadcrumb a { color: var(--blue); }
.breadcrumb a:hover { text-decoration: underline; }
.detail-hero {
  display: grid; grid-template-columns: 1fr 1.02fr; gap: clamp(24px, 4.4vw, 64px);
  align-items: center; padding-block: 29px 45px;
}
.detail-copy h1 { margin-block: 17px 19px; font-size: clamp(41px, 4.5vw, 66px); letter-spacing: -.072em; text-wrap: balance; }
.detail-intro { max-width: 500px; color: var(--muted); font-size: clamp(16px, 1.4vw, 20px); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin-top: 23px; }
.chips li { border: 1px solid #bacbff; border-radius: 3px; padding: 4px 11px; background: var(--white); color: var(--blue); font-size: 13px; font-weight: 750; }
.detail-art { min-width: 0; border: 1px solid #bacbff; background: var(--ice); }
.detail-art img { width: 100%; height: auto; }
.detail-art figcaption {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: 9px 15px; border-top: 1px solid #bacbff; background: var(--white); color: var(--muted); font-size: 12px;
}
.detail-art figcaption span:first-child { color: var(--blue); font-weight: 750; }
.scope { padding-block: 57px 63px; }
.scope-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.scope-card {
  display: flex; flex-direction: column; min-width: 0; padding: 18px 20px;
  border: 1px solid var(--line); border-top: 3px solid var(--blue);
}
.scope-card h3 { margin-block: 10px 10px; }
.scope-card > p { color: var(--muted); line-height: 1.75; }
.scope-card .card-tag { margin-top: auto; padding-top: 13px; color: var(--blue); font-weight: 700; font-size: 13px; }

.flow-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(24px, 5.5vw, 80px); }
.note { margin-top: 24px; padding: 14px 17px; border-left: 3px solid var(--blue); background: var(--white); }
.note h3 { color: var(--blue); font-size: 15px; }
.note p { margin-top: 6px; color: var(--muted); font-size: 14px; }
.steps { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.steps li { display: flex; gap: 17px; align-items: start; padding: 13px 0; border-bottom: 1px solid var(--line); }
.step-number { display: grid; place-items: center; flex: 0 0 33px; height: 33px; background: var(--blue); color: var(--white); font-weight: 750; font-size: 13px; border-radius: 50%; }
.steps h3 { font-size: 18px; margin-block: 1px 4px; }
.steps p { color: var(--muted); font-size: 15px; }
.detail-nav { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; padding-block: 33px; align-items: center; }
.overview-link { font-size: 15px; font-weight: 700; color: var(--blue); }
.overview-link:hover { text-decoration: underline; }
.next-link {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--blue); padding: 14px 19px; color: var(--white);
}
.next-link:hover { background: var(--ink); }
.next-link small { display: block; font-size: 12px; letter-spacing: .05em; }
.next-link strong { display: block; font-size: 18px; }

.footer { border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px 24px; min-height: 80px; padding-block: 14px; }
.footer-name { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .035em; color: var(--blue); }
.footer-cn { margin-left: 5px; font-size: 13px; color: var(--ink); font-weight: 700; }
.footer-purpose { margin-right: auto; color: var(--muted); font-size: 13px; }
.footer-beian { color: var(--muted); font-size: 13px; white-space: nowrap; }
.footer-beian:hover { color: var(--blue); text-decoration: underline; }
.back { color: var(--blue); font-size: 13px; white-space: nowrap; }
.back:hover { text-decoration: underline; }

@media (max-width: 1050px) {
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-card { min-height: 180px; }
  .hero-art { min-height: 300px; }
}
@media (max-width: 850px) {
  .header-inner { flex-wrap: wrap; gap: 0; padding-bottom: 5px; }
  .brand { margin-bottom: -7px; }
  .main-nav { flex: 1 0 100%; justify-content: space-between; max-width: 580px; }
  .section-top { align-items: start; flex-direction: column; gap: 9px; }
}
@media (max-width: 690px) {
  .home-hero, .detail-hero, .flow-grid { grid-template-columns: 1fr; }
  .home-hero { padding-block: 37px 39px; }
  .hero-art { min-height: 0; aspect-ratio: 1.61; }
  .services { padding-block: 25px 39px; }
  .section-top { margin-bottom: 16px; }
  .work-band { padding-block: 37px; }
  .collaboration-grid { grid-template-columns: 1fr; gap: 18px; }
  .detail-hero { padding-block: 24px 31px; }
  .detail-copy h1 { margin-block: 12px 13px; text-wrap: initial; }
  .detail-intro { max-width: 100%; }
  .chips { margin-top: 15px; }
  .scope { padding-block: 39px; }
  .scope-grid { grid-template-columns: 1fr; gap: 11px; margin-top: 20px; }
  .scope-card { padding: 14px 15px; }
  .detail-nav { gap: 14px; padding-block: 24px; }
  .footer-inner { display: grid; grid-template-columns: 1fr auto; }
  .footer-purpose { grid-row: 2; }
  .footer-beian { grid-column: 1; grid-row: 3; }
  .back { grid-column: 2; grid-row: 1; }
}
@media (max-width: 450px) {
  .main-nav { gap: 4px; }
  .main-nav a { font-size: 12px; }
  .home-copy h1 { font-size: 47px; }
  .home-tagline { font-size: 18px; }
  .service-grid { grid-template-columns: 1fr; gap: 10px; }
  .service-card { min-height: 0; padding: 13px 15px; }
  .service-card h3 { margin-top: 4px; }
  .detail-copy h1 { font-size: clamp(33px, 10vw, 43px); }
  .detail-nav { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}

/* —— Site framework extensions —— */
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.button-secondary {
  display: inline-flex; min-height: 50px; align-items: center; gap: 24px; padding: 11px 19px;
  border: 1.5px solid var(--blue); background: transparent; color: var(--blue);
  font-size: 15px; font-weight: 750; border-radius: 4px;
}
.button-secondary:hover { background: var(--blue); color: var(--white); }

.text-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--blue); font-size: 15px; font-weight: 750;
}
.text-link:hover { text-decoration: underline; }

.intro-teaser {
  display: grid; grid-template-columns: .9fr 1.1fr;
  gap: clamp(24px, 4.4vw, 64px); align-items: end;
  padding-block: 48px 56px; border-top: 1px solid var(--line);
}
.intro-teaser .intro-body { color: var(--muted); max-width: 560px; }
.intro-teaser .text-link { margin-top: 18px; }

.science-preview { padding-block: 56px 64px; border-top: 1px solid var(--line); }
.science-preview-grid {
  display: grid; grid-template-columns: 1.2fr .8fr;
  gap: clamp(24px, 4vw, 48px); margin-top: 26px; align-items: start;
}
.preview-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  margin-bottom: 14px;
}
.preview-head h3 { font-size: 18px; }

.expert-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
.expert-card {
  display: flex; flex-direction: column; padding: 17px 18px 16px;
  border-top: 3px solid var(--blue); background: var(--mist);
  transition: background-color .18s ease;
}
a.expert-card:hover { background: var(--ice); }
.expert-card-top { display: flex; justify-content: space-between; align-items: start; gap: 8px; }
.expert-avatar {
  display: grid; place-items: center; width: 48px; height: 48px;
  background: var(--blue); color: var(--white); font-weight: 750; font-size: 18px;
}
.expert-status { color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.expert-card .expert-field {
  color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; margin-top: 14px;
}
.expert-card h3 { margin-top: 4px; }
.expert-card > p { color: var(--muted); margin-block: 8px 16px; font-size: 14px; line-height: 1.7; }

.article-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.article-list li { border-bottom: 1px solid var(--line); }
.article-list a, .article-item {
  display: flex; justify-content: space-between; align-items: start; gap: 16px;
  padding: 14px 0;
}
.article-list h3 { font-size: 18px; }
.article-meta { color: var(--muted); font-size: 13px; margin-top: 4px; }
.article-list .read-more { margin-top: 2px; flex: 0 0 auto; }
.article-item .pending { font-size: 13px; font-weight: 700; white-space: nowrap; }

.page-hero { padding-block: 40px 48px; max-width: 760px; }
.page-hero h1 {
  margin-block: 17px 19px; font-size: clamp(41px, 4.5vw, 66px);
  letter-spacing: -.072em; text-wrap: balance;
}
.page-hero .detail-intro { max-width: 640px; }
.draft-note { margin-top: 18px; color: var(--muted); font-size: 13px; font-weight: 650; }

.about-section { padding-block: 56px 0; }
.about-section:last-of-type { padding-bottom: 64px; }
.work-band.about-coop { border-top: 1px solid var(--line); margin-top: 56px; }
.cta-row { margin-top: 28px; }

.contact-list { margin-top: 26px; border-top: 1px solid var(--line); }
.contact-row {
  display: grid; grid-template-columns: 160px 1fr; gap: 16px;
  padding: 16px 0; border-bottom: 1px solid var(--line); margin: 0;
}
.contact-row dt { font-weight: 750; }
.contact-row dd { color: var(--muted); margin: 0; }
.pending { color: var(--muted); }

.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; margin-top: 26px; }
.video-card { border: 1px solid var(--line); border-top: 3px solid var(--blue); background: var(--white); }
.video-thumb {
  position: relative; aspect-ratio: 16 / 9; display: grid; place-items: center;
  background: var(--mist); color: var(--blue); font-size: 13px; font-weight: 750;
}
.video-thumb svg { width: 44px; height: 44px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.video-card h3 { font-size: 18px; padding: 14px 16px 4px; }
.video-card p { color: var(--muted); font-size: 14px; padding: 0 16px 16px; }

.expert-profile { padding-block: 28px 48px; }
.expert-profile-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 22px 28px; align-items: start;
}
.expert-profile .expert-avatar { width: 72px; height: 72px; font-size: 26px; }
.expert-profile .expert-field { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.expert-profile h1 { margin-block: 6px 12px; font-size: clamp(36px, 4vw, 54px); letter-spacing: -.06em; }
.expert-profile .detail-intro { max-width: 640px; }
.expert-content { padding-block: 48px 28px; }
.expert-content + .expert-content { padding-top: 0; padding-bottom: 64px; }

.article-layout { padding-block: 16px 64px; }
.article-body { max-width: 720px; }
.article-body h1 {
  font-size: clamp(32px, 4vw, 48px); letter-spacing: -.06em;
  margin-block: 10px 16px; text-wrap: balance;
}
.article-body .article-meta { margin-bottom: 28px; }
.article-body .article-meta a { color: var(--blue); font-weight: 700; }
.article-body .article-meta a:hover { text-decoration: underline; }
.article-body p { color: var(--muted); margin-bottom: 1em; }
.video-embed {
  aspect-ratio: 16 / 9; margin-top: 32px; display: grid; place-items: center;
  background: var(--mist); border: 1px solid var(--line);
  color: var(--muted); font-size: 14px; text-align: center; padding: 16px;
}
.permalink-note { margin-top: 36px; }

.scope-grid.single { grid-template-columns: 1fr; max-width: 760px; }
.about-section .expert-grid { margin-top: 26px; }

@media (max-width: 1050px) {
  .expert-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 850px) {
  .intro-teaser, .science-preview-grid { grid-template-columns: 1fr; }
  .science-preview-grid { gap: 32px; }
}
@media (max-width: 690px) {
  .intro-teaser { padding-block: 36px 40px; }
  .science-preview { padding-block: 36px 40px; }
  .expert-grid, .video-grid { grid-template-columns: 1fr; }
  .page-hero { padding-block: 28px 32px; }
  .page-hero h1 { margin-block: 12px 13px; text-wrap: initial; }
  .about-section { padding-block: 39px 0; }
  .about-section:last-of-type { padding-bottom: 39px; }
  .work-band.about-coop { margin-top: 39px; }
  .contact-row { grid-template-columns: 1fr; gap: 4px; }
  .expert-profile-grid { grid-template-columns: 1fr; }
  .expert-content { padding-block: 32px 16px; }
  .expert-content + .expert-content { padding-bottom: 40px; }
  .article-layout { padding-bottom: 40px; }
}
@media (max-width: 450px) {
  .expert-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: clamp(33px, 10vw, 43px); }
}