@charset "UTF-8";

@font-face {
  font-family: "Manrope";
  src: url("/assets/fonts/manrope-latin-variable.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("/assets/fonts/noto-sans-sc-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("/assets/fonts/noto-sans-sc-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f6f9fd;
  --paper: #ffffff;
  --ink: #102641;
  --muted: #526880;
  --line: #d3deeb;
  --accent: #006cae;
  --soft: #e8f1fa;
  --grid: rgb(69 104 143 / 3%);
  --glow: rgb(39 136 205 / 6%);
  --selection: #c8e9ff;
  --selection-ink: #0b2c47;
  --sans: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #091426;
  --paper: #102139;
  --ink: #f0f5fc;
  --muted: #a9bdd5;
  --line: #283d58;
  --accent: #68d9fc;
  --soft: #132a43;
  --grid: rgb(134 169 209 / 3%);
  --glow: rgb(29 153 205 / 9%);
  --selection: #254f69;
  --selection-ink: #f3f9ff;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 560px 420px at 88% 0%, var(--glow), transparent 75%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: auto, 64px 64px, 64px 64px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
a, button { touch-action: manipulation; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
  border-radius: 2px;
}
::selection { background: var(--selection); color: var(--selection-ink); }
svg { display: block; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 600; }
img { max-width: 100%; }
[hidden] { display: none !important; }

.skip {
  position: fixed;
  top: -80px;
  left: 20px;
  z-index: 20;
  padding: 10px;
  background: var(--ink);
  color: var(--bg);
}
.skip:focus { top: 10px; }
.container { max-width: 1120px; padding: 0 36px; margin: 0 auto; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 100px;
  gap: 24px;
}
.brand { display: flex; align-items: baseline; flex-shrink: 0; }
.brand-name { font-size: 24px; font-weight: 600; }
.navigation { display: flex; align-items: center; gap: 28px; font-size: 13px; }
.navigation > a { white-space: nowrap; }
.navigation a[aria-current="page"] {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 8px;
}
.nav-tools {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-left: 7px;
  border-left: 1px solid var(--line);
  padding-left: 21px;
}
.language { font-size: 12px; }
.theme-toggle { background: none; border: 0; padding: 6px; display: grid; place-items: center; }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }

.eyebrow {
  font-size: 12px;
  letter-spacing: .035em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.5;
}
.hero {
  position: relative;
  isolation: isolate;
  padding: 76px 0 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 276px;
  gap: 52px;
  align-items: start;
}
.hero-art {
  position: absolute;
  inset: -65px -36px -70px;
  z-index: -1;
  pointer-events: none;
  mask-image: linear-gradient(90deg, transparent, #000 28%, #000 80%, transparent), linear-gradient(transparent, #000 22%, #000 72%, transparent);
  mask-composite: intersect;
  opacity: .2;
}
.hero-art picture { display: block; width: 100%; height: 100%; }
.hero-art img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: right center; }
:root[data-theme="dark"] .hero-art { opacity: .38; }
.hero-copy { min-width: 0; }
.hero h1 { font-size: 58px; line-height: 1.35; margin: 15px 0 16px; }
.hero h1 .name-dot { font-size: .6em; font-weight: 400; margin: 0 .16em; color: var(--muted); }
.hero h1 .hero-roman { font-size: .58em; font-weight: 400; letter-spacing: -.025em; color: var(--muted); }
html[lang="en"] .hero h1 { letter-spacing: -.035em; }
.hero-lead { font-size: 21px; line-height: 1.7; max-width: 660px; }
.hero-text { font-size: 15px; color: var(--muted); margin-top: 19px; max-width: 660px; }
.hero-text p + p { margin-top: 12px; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.text-link:hover { border-color: var(--accent); }
.arrow { font-family: Arial, sans-serif; font-size: 15px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 24px; font-size: 13px; }
.hero-note { margin-top: 23px; padding-left: 25px; border-left: 1px solid var(--line); }
.method-caption { color: var(--accent); font-size: 12px; font-weight: 500; line-height: 1.6; }
.hero-note .eyebrow { margin-top: 13px; }
.method-steps { list-style: none; margin: 20px 0 0; padding: 0; }
.method-steps li { position: relative; padding: 0 0 23px 22px; font-size: 13px; line-height: 1.6; }
.method-steps li:last-child { padding-bottom: 0; }
.method-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--accent);
  border-radius: 1px;
  background: var(--soft);
}
.method-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 18px;
  width: 1px;
  height: calc(100% - 18px);
  background: var(--line);
}
.method-steps strong { display: block; font-weight: 600; }
.method-phrase { display: block; white-space: nowrap; }
.method-steps small { display: block; color: var(--muted); font-size: 12px; margin-top: 5px; }

.section { border-top: 1px solid var(--line); padding: 43px 0 55px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 31px; }
.section-heading h2 { font-size: 25px; }
.section-heading .text-link { font-size: 12px; color: var(--muted); }
.section-heading .text-link:hover { color: var(--accent); }
.section-kicker { font-size: 12px; font-weight: 400; color: var(--muted); margin-left: 15px; }
.career-row { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 42px; padding: 28px 0; }
.career-row + .career-row { border-top: 1px solid var(--line); }
.career-identity { display: flex; flex-direction: column; align-items: flex-start; }
.career-company { font-size: 21px; line-height: 1.45; margin-top: 14px; }
.career-mark { display: grid; place-items: center; width: 54px; height: 54px; }
.career-mark img { display: block; width: 50px; height: 50px; object-fit: contain; }
.career-mark-zhipu { position: relative; overflow: hidden; border: 1px solid var(--line); background: #fff; border-radius: 12px; }
.career-mark-zhipu img { position: absolute; left: 4px; top: 4px; width: auto; height: 44px; max-width: none; clip-path: inset(0 calc(100% - 44px) 0 0); }
.career-mark-early { border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
.career-mark-early img { width: 40px; height: 40px; }
.career-row-early .career-copy { color: var(--muted); font-size: 14px; }
.career-date { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; margin-top: 6px; }
.career-role { font-size: 13px; margin-bottom: 11px; color: var(--accent); }
.career-copy { font-size: 15px; max-width: 690px; }
.career-results { display: flex; gap: 36px; flex-wrap: wrap; margin-top: 20px; }
.career-result strong { font-size: 25px; font-weight: 600; line-height: 1.4; display: block; font-variant-numeric: tabular-nums; }
.career-result span { display: block; font-size: 12px; color: var(--muted); margin-top: 4px; }
.career-context { font-size: 12px; line-height: 1.7; color: var(--muted); margin-top: 12px; max-width: 650px; }
.career-links { display: flex; gap: 23px; flex-wrap: wrap; font-size: 12px; margin-top: 19px; }

.work-row {
  display: grid;
  grid-template-columns: 37px minmax(0, 1fr) 120px 25px;
  gap: 20px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.work-row:first-child { padding-top: 0; }
.work-row:last-child { border-bottom: none; padding-bottom: 0; }
.work-number { font-size: 12px; color: var(--muted); padding-top: 6px; font-variant-numeric: tabular-nums; }
.work-row h3 { font-size: 18px; line-height: 1.6; font-weight: 500; }
.work-row p { font-size: 13px; color: var(--muted); margin-top: 7px; max-width: 680px; }
.work-category { font-size: 12px; color: var(--muted); padding-top: 6px; text-align: right; }
.work-arrow { padding-top: 4px; text-align: right; transition: transform .2s; color: var(--accent); }
.work-row:hover .work-arrow { transform: translate(3px, -3px); }
.work-row:hover h3 { color: var(--accent); }

.article-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 25px;
  gap: 23px;
  padding: 21px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.article-row:first-child { padding-top: 0; }
.article-row:last-child { border-bottom: none; }
.article-category { font-size: 12px; color: var(--muted); }
.article-meta { display: flex; flex-direction: column; gap: 5px; font-size: 12px; line-height: 1.65; color: var(--muted); }
.article-date { font-size: 12px; font-variant-numeric: tabular-nums; color: var(--muted); }
.article-row h3 { font-size: 16px; font-weight: 500; line-height: 1.7; }
.article-row p { font-size: 12px; color: var(--muted); margin-top: 6px; }
.article-row .arrow { color: var(--accent); }
.article-row:hover h3 { color: var(--accent); }

.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; }
.research-single { max-width: 730px; }
.research-block { padding-top: 23px; border-top: 1px solid var(--line); }
.research-single .research-block { padding-top: 0; border-top: 0; }
.research-block h3 { font-size: 17px; font-weight: 500; margin-bottom: 8px; }
.research-block p { font-size: 13px; color: var(--muted); margin-bottom: 13px; }
.research-block .text-link { font-size: 12px; }

.contact-section { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 42px; }
.contact-section h2 { font-size: 25px; }
.contact-section p { font-size: 14px; color: var(--muted); max-width: 620px; }
.contact-links { display: flex; align-items: center; gap: 18px 24px; flex-wrap: wrap; margin-top: 19px; font-size: 13px; }
.email-action { display: flex; flex-direction: column; align-items: flex-start; max-width: 100%; gap: 7px; }
.email-pill { display: inline-flex; align-items: stretch; max-width: 100%; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); }
.email-address { display: inline-flex; align-items: center; min-width: 0; padding: 9px 15px; color: var(--accent); line-height: 1.6; white-space: nowrap; }
.copy-email {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  gap: 6px;
  padding: 9px 13px;
  font-size: 12px;
  line-height: 1.6;
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0 999px 999px 0;
  background: transparent;
  color: var(--muted);
}
.copy-email svg { width: 14px; height: 14px; }
.copy-email:hover { color: var(--accent); background: var(--soft); }
.copy-status {
  display: block;
  max-width: 100%;
  padding-left: 15px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.copy-status:empty { display: none; }
.site-footer { border-top: 1px solid var(--line); padding: 24px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 12px; }
.footer-inner a { border-bottom: 1px solid var(--line); }

.page-heading { padding: 65px 0 47px; max-width: 800px; }
.page-heading h1 { font-size: 41px; line-height: 1.4; margin: 11px 0 18px; }
html[lang="en"] .page-heading h1 { letter-spacing: -.025em; }
.page-heading p { font-size: 15px; color: var(--muted); max-width: 690px; }
.page-heading .eyebrow { display: block; }
.page-content { padding-bottom: 72px; }
.archive-heading { font-size: 13px; color: var(--muted); padding-bottom: 24px; }
.filter-bar { display: flex; gap: 9px; flex-wrap: wrap; margin-bottom: 31px; }
.filter-button { border: 1px solid var(--line); background: none; border-radius: 4px; padding: 6px 15px; font-size: 12px; }
.filter-button:hover { color: var(--accent); border-color: var(--accent); }
.filter-button[aria-pressed="true"] { background: var(--soft); color: var(--accent); border-color: var(--accent); }
.filtered-count { font-size: 12px; color: var(--muted); margin-bottom: 25px; }
.article-note { font-size: 12px; color: var(--muted); margin-top: 24px; }

.about-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 42px; }
.about-aside { font-size: 12px; color: var(--muted); line-height: 2; }
.about-focus-list { display: grid; gap: 3px; }
.about-aside strong { display: block; font-size: 14px; color: var(--ink); font-weight: 500; margin-bottom: 8px; }
.prose { font-size: 16px; line-height: 2.1; max-width: 730px; }
.prose p + p { margin-top: 23px; }
.prose h2 { font-size: 23px; line-height: 1.6; margin: 43px 0 17px; }
.principle { margin-top: 22px; }
.principle h3 { font-size: 16px; font-weight: 500; color: var(--accent); margin-bottom: 6px; }
.principle p { font-size: 14px; color: var(--muted); }
.breadcrumb { font-size: 12px; color: var(--muted); margin-bottom: 24px; }
.detail-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 42px; }
.detail-meta { font-size: 12px; line-height: 1.8; color: var(--muted); }
.detail-meta dl { margin: 0; }
.detail-meta dt { font-size: 12px; margin-top: 20px; text-transform: uppercase; }
.detail-meta dt:first-child { margin-top: 0; }
.detail-meta dd { margin: 6px 0 0; color: var(--ink); }
.detail-meta .text-link { margin-top: 22px; font-size: 12px; }
.detail-metrics { display: flex; flex-wrap: wrap; gap: 28px 42px; padding-bottom: 29px; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.detail-metric strong { font-size: 29px; font-weight: 600; line-height: 1.4; font-variant-numeric: tabular-nums; }
.detail-metric span { display: block; color: var(--muted); font-size: 12px; margin-top: 6px; max-width: 185px; }
.detail-body .prose > section:first-child h2 { margin-top: 0; }
.related { margin-top: 45px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; gap: 18px; justify-content: space-between; font-size: 12px; }
.reading-note { border-left: 2px solid var(--line); padding-left: 20px; font-size: 12px; color: var(--muted); margin-top: 35px; }
.page-bottom-contact { padding-top: 29px; }

.reveal { animation: enter .5s ease both; }
@keyframes enter {
  from { opacity: 0; transform: translateY(9px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 1500px) {
  .container { max-width: 1180px; }
  .hero { padding-top: 86px; }
}

@media (max-width: 850px) {
  .container { padding: 0 28px; }
  .header-inner { min-height: 84px; }
  .navigation { gap: 19px; }
  .hero { gap: 32px; grid-template-columns: minmax(0, 1fr) 245px; padding: 52px 0; }
  .hero-art { inset-inline: -28px; }
  .hero h1 { font-size: 47px; }
  .hero-lead { font-size: 19px; }
  .hero-note { padding-left: 20px; }
  .career-row, .contact-section, .about-layout, .detail-layout { grid-template-columns: 155px minmax(0, 1fr); gap: 26px; }
  .work-row { grid-template-columns: 30px minmax(0, 1fr) 25px; gap: 14px; }
  .work-category { display: none; }
  .article-row { grid-template-columns: 110px minmax(0, 1fr) 18px; gap: 15px; }
  .two-column { gap: 30px; }
}

@media (max-width: 600px) {
  .container { padding: 0 22px; }
  .header-inner { min-height: 76px; gap: 13px 18px; flex-wrap: wrap; padding: 17px 22px; }
  .brand-name { font-size: 21px; }
  .navigation { gap: 16px; font-size: 12px; }
  .navigation .home-nav { display: none; }
  .nav-tools { padding-left: 13px; gap: 9px; margin-left: 0; }
  .theme-toggle { padding: 5px; }
  .hero { display: block; padding: 42px 0 43px; }
  .hero-art { inset: -35px -22px -55px; mask-image: linear-gradient(90deg, transparent, #000 30%, #000 82%, transparent), linear-gradient(transparent, #000 22%, #000 72%, transparent); }
  .hero h1 { font-size: 44px; margin: 13px 0 15px; }
  .hero-lead { font-size: 20px; line-height: 1.8; }
  .hero-text { font-size: 14px; }
  .hero-note { display: none; }
  .hero-links { margin-top: 23px; gap: 21px; }
  .section { padding: 31px 0 37px; }
  .section-heading { margin-bottom: 20px; }
  .section-heading h2 { font-size: 23px; }
  .section-kicker { display: inline-block; font-size: 11px; margin-left: 12px; }
  .career-row { display: block; padding: 24px 0; }
  .career-company { font-size: 21px; }
  .career-date { margin: 4px 0 14px; }
  .career-role { font-size: 12px; }
  .career-copy { font-size: 14px; }
  .career-results { gap: 29px; margin-top: 17px; }
  .career-links { gap: 18px; }
  .work-row { grid-template-columns: 24px minmax(0, 1fr) 18px; gap: 12px; padding: 20px 0; }
  .work-row h3 { font-size: 16px; }
  .work-row p { font-size: 12px; }
  .article-row { grid-template-columns: minmax(0, 1fr) 18px; gap: 10px; padding: 18px 0; }
  .article-meta { grid-column: 1; flex-direction: row; flex-wrap: wrap; gap: 5px 14px; }
  .article-category { grid-column: 1; }
  .article-row .article-copy { grid-column: 1; }
  .article-row .arrow { grid-column: 2; grid-row: 1 / 3; align-self: center; }
  .article-row h3 { font-size: 15px; }
  .two-column { display: block; }
  .research-block + .research-block { margin-top: 26px; }
  .contact-section { display: block; }
  .contact-section h2 { margin-bottom: 15px; }
  .contact-links { gap: 14px 20px; font-size: 12px; }
  .email-address { padding: 10px 12px; }
  .copy-email { padding: 10px 11px; }
  .footer-inner { display: block; line-height: 2; }
  .footer-inner div + div { margin-top: 5px; }
  .page-heading { padding: 42px 0 32px; }
  .page-heading h1 { font-size: 33px; }
  .page-heading p { font-size: 14px; }
  .page-content { padding-bottom: 43px; }
  .about-layout, .detail-layout { display: block; }
  .about-aside { padding-bottom: 24px; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
  .about-aside br { display: none; }
  .about-focus-list { display: grid; gap: 3px; }
.about-aside strong { margin-bottom: 5px; }
  .prose { font-size: 15px; line-height: 2; }
  .prose h2 { font-size: 22px; margin-top: 33px; }
  .detail-meta { padding-bottom: 25px; margin-bottom: 25px; border-bottom: 1px solid var(--line); }
  .detail-meta dl { display: grid; grid-template-columns: 65px minmax(0, 1fr); gap: 9px 14px; }
  .detail-meta dt, .detail-meta dd { margin: 0; }
  .detail-meta .text-link { margin-top: 17px; }
  .detail-metrics { gap: 22px 30px; }
  .detail-metric strong { font-size: 26px; }
  .detail-metric span { max-width: 135px; }
  .filter-bar { gap: 7px; margin-bottom: 23px; }
  .filter-button { padding: 5px 11px; }
  .related { line-height: 1.8; }
  .breadcrumb { margin-bottom: 20px; }
}

@media (max-width: 365px) {
  .brand-name { font-size: 18px; }
  .navigation { gap: 13px; flex-wrap: wrap; }
  .nav-tools { padding-left: 10px; gap: 6px; }
  .container { padding: 0 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { animation: none; }
  .work-arrow { transition: none; }
}