:root {
  --ink: #12333a;
  --ink-deep: #0b262c;
  --teal: #08766d;
  --teal-light: #dcece8;
  --mint: #edf5f2;
  --gold: #c99b3c;
  --paper: #fbfcfb;
  --warm: #f5f2eb;
  --text: #24383c;
  --muted: #61777a;
  --line: #d7e3e1;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.75;
}
body::selection { background: #b9ddd6; color: var(--ink-deep); }
.page-top { position: absolute; top: 0; left: 0; width: 1px; height: 1px; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(251, 252, 251, .96);
  border-bottom: 1px solid rgba(18, 51, 58, .1);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--teal);
  color: white;
  border-radius: 5px;
  font: 700 20px/1 Georgia, serif;
}
.brand strong, .brand small { display: block; letter-spacing: 0; }
.brand strong { font-size: 15px; }
.brand small { color: var(--muted); font-size: 10px; line-height: 1.3; }
nav { display: flex; align-items: center; gap: 28px; }
nav a { position: relative; color: #41575b; font-size: 14px; text-decoration: none; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px; background: var(--teal); transition: right .2s ease; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }
.menu-button { display: none; border: 0; background: none; color: var(--ink); font: inherit; }

.hero {
  position: relative;
  min-height: 660px;
  height: calc(100vh - 72px);
  max-height: 800px;
  overflow: hidden;
  color: white;
  background: var(--ink-deep);
}
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6, 27, 32, .94) 0%, rgba(6, 27, 32, .79) 37%, rgba(6, 27, 32, .22) 69%, rgba(6, 27, 32, .08) 100%); }
.hero-content {
  position: relative;
  z-index: 2;
  width: min(var(--max), calc(100% - 48px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 50px 0 54px;
}
.hero-content > * { width: min(620px, 52%); }
.eyebrow, .section-number, .output-label, .contact-band > div > p { margin: 0 0 14px; color: var(--gold); font-size: 12px; font-weight: 700; letter-spacing: 0; text-transform: uppercase; }
.hero h1 { margin: 0; font-family: "STSong", "SimSun", serif; font-size: clamp(64px, 8vw, 104px); line-height: .98; font-weight: 600; letter-spacing: 0; }
.hero-role { max-width: 620px; margin: 24px 0 14px; color: #edf6f4; font-family: "STSong", "SimSun", serif; font-size: clamp(24px, 2.4vw, 34px); line-height: 1.35; }
.hero-role span { display: block; width: max-content; max-width: 100%; white-space: nowrap; }
.hero-summary { max-width: 580px; margin: 0; color: rgba(255,255,255,.78); font-size: 16px; }
.hero-actions { display: flex; gap: 12px; margin-top: 30px; }
.button {
  min-height: 46px;
  padding: 10px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--gold); color: var(--ink-deep); }
.button-ghost { border-color: rgba(255,255,255,.42); color: white; background: rgba(255,255,255,.04); }
.button-dark { background: var(--ink); color: white; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 0; padding: 0; list-style: none; }
.hero-tags li { padding: 6px 10px; border: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.76); font-size: 11px; }
.hero-index { position: absolute; right: 28px; bottom: 28px; z-index: 2; display: grid; gap: 3px; color: rgba(255,255,255,.45); font-size: 9px; text-align: right; }
.hero-index span:first-child { color: var(--gold); font: 400 30px/1 Georgia, serif; }

.quick-read { position: relative; z-index: 3; margin-top: -38px; padding: 0 24px; }
.quick-read-inner { width: min(var(--max), 100%); margin: 0 auto; display: grid; grid-template-columns: repeat(5, 1fr); background: white; box-shadow: 0 16px 45px rgba(13, 48, 53, .12); }
.quick-read article { min-height: 118px; padding: 24px; border-right: 1px solid var(--line); }
.quick-read article:last-child { border-right: 0; }
.quick-read strong { display: block; color: var(--teal); font: 600 31px/1.15 Georgia, "SimSun", serif; }
.quick-read span { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; line-height: 1.45; }

.section { padding: 110px max(24px, calc((100vw - var(--max)) / 2)); scroll-margin-top: 70px; }
.section-heading { max-width: 720px; margin-bottom: 52px; }
.section-heading h2, .paper-intro h2, .contact-band h2 { margin: 0; color: var(--ink); font-family: "STSong", "SimSun", serif; font-size: clamp(34px, 4vw, 50px); line-height: 1.25; font-weight: 600; letter-spacing: 0; }
.section-heading > p:last-child { max-width: 640px; margin: 16px 0 0; color: var(--muted); }
.section-number { color: var(--teal); }

.profile-section { padding-top: 120px; background: var(--paper); }
.profile-layout { display: grid; grid-template-columns: 1.22fr .9fr; gap: 100px; align-items: start; }
.lead-copy .lead { margin-top: 0; color: var(--ink); font-family: "STSong", "SimSun", serif; font-size: 30px; line-height: 1.55; }
.lead-copy blockquote { margin: 38px 0 0; padding: 22px 24px; border-left: 4px solid var(--gold); background: var(--warm); color: var(--ink); font-weight: 700; }
.profile-facts { margin: 0; border-top: 2px solid var(--ink); }
.profile-facts div { display: grid; grid-template-columns: 100px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.profile-facts dt { color: var(--muted); font-size: 12px; }
.profile-facts dd { margin: 0; color: var(--ink); font-size: 14px; font-weight: 700; }

.programs-section { background: var(--ink); color: white; }
.section-heading.light h2 { color: white; }
.section-heading.light > p:last-child { color: rgba(255,255,255,.6); }
.section-heading.light .section-number { color: #71c0b5; }
.program-list { border-top: 1px solid rgba(255,255,255,.22); }
.program-item { display: grid; grid-template-columns: 80px 1fr 1.2fr; gap: 44px; padding: 42px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.program-index { color: var(--gold); font: 400 34px/1 Georgia, serif; }
.program-title p { margin: 0 0 8px; color: #76c7bb; font-size: 11px; font-weight: 700; }
.program-title h3 { margin: 0; color: white; font-family: "STSong", "SimSun", serif; font-size: 26px; line-height: 1.45; }
.program-copy p { margin: 0 0 14px; color: rgba(255,255,255,.7); }
.program-copy strong { display: block; color: #f6e2b5; font-size: 13px; }

.data-section { background: var(--warm); }
.data-section .section-heading { max-width: 1000px; }
.data-section .section-heading h2 { max-width: 1000px; font-size: clamp(34px, 3.25vw, 46px); line-height: 1.32; text-wrap: balance; word-break: keep-all; }
.data-section .section-heading > p:last-child { max-width: 820px; }
.data-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; align-items: start; }
.data-flow { position: relative; }
.data-flow::before { content: ""; position: absolute; left: 20px; top: 24px; bottom: 28px; width: 1px; background: #b8d0cc; }
.data-flow > div { position: relative; min-height: 88px; padding: 0 0 24px 68px; }
.data-flow span { position: absolute; left: 0; top: 0; width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid #9ebcb7; border-radius: 50%; background: var(--warm); color: var(--teal); font: 700 11px/1 Arial, sans-serif; }
.data-flow strong { display: block; color: var(--ink); font-size: 16px; }
.data-flow p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.data-capabilities { display: grid; grid-template-columns: 1fr 1fr; border-top: 2px solid var(--ink); border-left: 1px solid var(--line); }
.data-capabilities article { min-height: 210px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.55); }
.data-capabilities h3 { margin: 0 0 12px; color: var(--teal); font-size: 17px; }
.data-capabilities p { margin: 0; color: var(--muted); font-size: 14px; }

.output-section { background: white; }
.output-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 2px solid var(--ink); }
.output-grid article { padding: 36px 40px 28px 0; border-bottom: 1px solid var(--line); }
.output-grid article + article { padding-left: 40px; border-left: 1px solid var(--line); }
.output-label { color: var(--teal); }
.output-grid h3 { margin: 0 0 22px; color: var(--ink); font-family: "STSong", "SimSun", serif; font-size: 28px; }
.output-grid ul { margin: 0; padding-left: 20px; }
.output-grid li { margin-bottom: 14px; color: var(--muted); }
.source-note { margin: 22px 0 0; color: var(--muted); font-size: 12px; }

.paper-section { background: var(--mint); }
.paper-intro { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 42px; }
.paper-intro > div:first-child { max-width: 800px; }
.paper-intro h2 { font-size: clamp(32px, 4vw, 48px); }
.paper-disclaimer { margin: 15px 0 0; color: #8a5d18; font-weight: 700; }
.paper-actions, .document-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 16px; flex: 0 0 auto; }
.text-link { color: var(--teal); font-size: 13px; font-weight: 700; text-underline-offset: 4px; }
.paper-summary { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 30px; border-top: 2px solid var(--ink); border-left: 1px solid var(--line); }
.paper-summary article { min-height: 200px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.54); }
.paper-summary span { color: var(--teal); font-size: 12px; font-weight: 700; }
.paper-summary p { margin: 12px 0 0; color: var(--muted); font-size: 13px; }

.pdf-shell { overflow: hidden; border: 1px solid #c9d9d6; border-radius: 5px; background: #dfe7e5; box-shadow: 0 18px 45px rgba(18, 51, 58, .12); }
.pdf-shell iframe { display: block; width: 100%; height: min(850px, 78vh); border: 0; background: white; }
.large-viewer iframe { height: min(900px, 82vh); }
.pdf-toolbar { min-height: 46px; padding: 8px 14px; display: flex; align-items: center; justify-content: space-between; background: var(--ink); color: rgba(255,255,255,.74); font-size: 12px; }
.pdf-toolbar a { color: white; font-weight: 700; }

.documents-section { background: var(--paper); }
.document-block { margin-top: 74px; }
.document-intro { display: flex; justify-content: space-between; align-items: end; gap: 36px; margin-bottom: 24px; }
.document-intro > div:first-child { max-width: 720px; }
.document-intro span { color: var(--teal); font-size: 11px; font-weight: 700; }
.document-intro h3 { margin: 6px 0 8px; color: var(--ink); font-family: Georgia, "Times New Roman", serif; font-size: 30px; line-height: 1.25; }
.document-intro p { margin: 0; color: var(--muted); }

.contact-band { padding: 72px max(24px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 40px; background: var(--ink-deep); color: white; }
.contact-band h2 { color: white; font-size: clamp(30px, 4vw, 45px); }
.contact-band span { color: rgba(255,255,255,.58); }
.contact-band .button { min-width: 150px; }
footer { padding: 30px max(24px, calc((100vw - var(--max)) / 2)); display: flex; justify-content: space-between; background: #061a1f; color: rgba(255,255,255,.48); font-size: 11px; }
footer p { margin: 0; }

@media (max-width: 980px) {
  .site-header { height: 64px; }
  .menu-button { display: block; }
  nav { position: absolute; left: 0; right: 0; top: 64px; display: none; padding: 16px 24px 24px; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; gap: 12px; }
  nav.open { display: flex; }
  .hero { min-height: 650px; height: calc(100vh - 64px); }
  .hero-content > * { width: min(620px, 62%); }
  .quick-read-inner { grid-template-columns: repeat(3, 1fr); }
  .quick-read article:nth-child(3) { border-right: 0; }
  .quick-read article:nth-child(n+4) { border-top: 1px solid var(--line); }
  .profile-layout, .data-layout { grid-template-columns: 1fr; gap: 52px; }
  .program-item { grid-template-columns: 60px 1fr; gap: 30px; }
  .program-copy { grid-column: 2; }
  .paper-summary { grid-template-columns: 1fr 1fr; }
  .paper-intro, .document-intro { align-items: flex-start; flex-direction: column; }
  .paper-actions, .document-actions { justify-content: flex-start; }
}

@media (max-width: 680px) {
  .brand small { display: none; }
  .brand strong { font-size: 13px; }
  .hero { min-height: 700px; max-height: 760px; }
  .hero-image { object-position: 62% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(6,27,32,.95) 0%, rgba(6,27,32,.81) 62%, rgba(6,27,32,.35) 100%); }
  .hero-content { width: calc(100% - 36px); padding: 48px 0 42px; justify-content: flex-end; }
  .hero-content > * { width: 100%; }
  .hero h1 { font-size: 68px; }
  .hero-role { font-size: 24px; }
  .hero-summary { font-size: 14px; }
  .hero-actions { width: 100%; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-tags { display: none; }
  .hero-index { display: none; }
  .quick-read { margin-top: 0; padding: 0; }
  .quick-read-inner { grid-template-columns: 1fr 1fr; box-shadow: none; }
  .quick-read article { min-height: 104px; padding: 20px 18px; border-bottom: 1px solid var(--line); }
  .quick-read article:nth-child(even) { border-right: 0; }
  .quick-read article:last-child { grid-column: 1 / -1; }
  .section { padding: 76px 18px; }
  .section-heading { margin-bottom: 36px; }
  .section-heading h2, .paper-intro h2 { font-size: 34px; }
  .data-section .section-heading h2 { font-size: 31px; line-height: 1.4; }
  .lead-copy .lead { font-size: 24px; }
  .profile-facts div { grid-template-columns: 82px 1fr; gap: 12px; }
  .program-item { grid-template-columns: 42px 1fr; gap: 18px; padding: 34px 0; }
  .program-index { font-size: 25px; }
  .program-title h3 { font-size: 22px; }
  .data-capabilities, .output-grid, .paper-summary { grid-template-columns: 1fr; }
  .data-capabilities article { min-height: 0; }
  .output-grid article, .output-grid article + article { padding: 28px 0; border-left: 0; }
  .paper-actions, .document-actions { width: 100%; }
  .paper-actions .button, .document-actions .button { flex: 1 1 100%; }
  .pdf-shell iframe, .large-viewer iframe { height: 74vh; min-height: 560px; }
  .document-block { margin-top: 58px; }
  .document-intro h3 { font-size: 25px; overflow-wrap: anywhere; }
  .contact-band { padding: 56px 18px; align-items: flex-start; flex-direction: column; }
  footer { padding: 24px 18px; flex-direction: column; gap: 6px; }
}

@media print {
  .site-header, .hero-actions, .paper-actions, .document-actions, .pdf-shell, .contact-band { display: none; }
  .hero { min-height: 360px; height: auto; }
  .section { padding: 44px 30px; }
}