/* ==========================================================================
   DAI XUDONG · CURATORIAL EDITORIAL DESIGN SYSTEM (HKUST AMC 2027)
   Architectural White · High-Contrast Ink · Academic Cobalt · Trophy Amber
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-subtle: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-dark: #0f141c;
  --ink: #0f141c;
  --ink-secondary: #2d333b;
  --muted: #5c6675;
  --subtle: #8c96a5;
  --line: #e2e6eb;
  --line-strong: #0f141c;
  --paper: #ffffff;
  --accent: #0b4ea2;
  --accent-hover: #083b7b;
  --accent-light: #f0f5fc;
  --award-gold: #b45309;
  --award-bg: #fffbeb;
  --award-border: #fde68a;
  --shadow-sm: 0 1px 3px rgba(15, 20, 28, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 20, 28, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 20, 28, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-serif: Georgia, "Times New Roman", "Songti SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease, text-decoration 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 4px;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
video:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.score-rule {
  background: transparent;
  height: 0;
  border: 0;
}

/* Site Width & Header */
.site-header,
main,
.site-footer {
  width: min(1160px, calc(100% - 64px));
  margin: 0 auto;
}

.site-header {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

.brand {
  font-size: 18px;
  font-weight: 650;
  color: var(--ink);
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand small {
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13.5px;
}

.site-header nav a {
  color: var(--ink-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.site-header nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.site-footer {
  padding: 32px 0 48px;
  margin-top: 64px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--ink);
}

/* Micro-typography */
.eyebrow,
.mono {
  font: 11px/1.6 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

/* Application Status Pill Banner */
.application-kicker-banner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  font-size: 10.5px;
  color: var(--ink-secondary);
  margin-bottom: 18px;
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  max-width: 100%;
  flex-wrap: wrap;
}

.application-kicker-banner .live-dot {
  width: 7px;
  height: 7px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  flex-shrink: 0;
}

/* Award Showcase Pill / Banner */
.hero-award-callout {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--award-bg);
  border: 1px solid var(--award-border);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  margin: 14px 0 18px;
  font-size: 12.5px;
  color: var(--award-gold);
  font-weight: 550;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease;
}

.hero-award-callout:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.hero-award-callout .award-icon {
  font-size: 14px;
}

.hero-award-callout .award-badge-tag {
  background: #fef08a;
  color: #854d0e;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  margin-left: 6px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.focus-hero {
  padding: 48px 0 52px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 48px;
  align-items: center;
}

.focus-hero h1 {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 10px 0 12px;
}

.focus-hero h1 span {
  font-family: var(--font-sans);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--muted);
  margin-left: 14px;
}

.hero-motto {
  font-family: var(--font-serif);
  font-size: 21px;
  line-height: 1.4;
  color: var(--ink);
  margin: 10px 0 12px;
  font-style: italic;
  font-weight: 400;
}

.hero-motto span {
  font-style: normal;
  color: var(--muted);
  font-size: 14px;
  margin-left: 8px;
  font-family: var(--font-sans);
  display: inline-block;
}

.focus-role {
  font-size: 16px;
  font-weight: 550;
  color: var(--ink-secondary);
  margin: 6px 0 12px;
}

.focus-bio {
  max-width: 660px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  margin: 10px 0 16px;
}

.focus-sub {
  font-size: 12.5px;
  color: var(--muted);
  margin: 12px 0 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 24px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ink);
  color: #ffffff;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 550;
  border: 1px solid var(--ink);
  transition: all 0.15s ease;
}

.btn-primary:hover {
  background: #252b36;
  border-color: #252b36;
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  color: var(--ink);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: all 0.15s ease;
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--border-subtle);
  color: var(--ink);
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-portrait-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  background: var(--bg-subtle);
}

.hero-portrait-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  object-position: 50% 38%;
  display: block;
}

.hero-portrait-caption {
  padding: 10px 12px;
  background: #ffffff;
  border-top: 1px solid var(--line);
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* ==========================================================================
   FLAGSHIP SECTION · XUNPU STUDIO (讯谱)
   Studio Frame with macOS Titlebar Chrome
   ========================================================================== */
.xunpu-flagship {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.flagship-window {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: #ffffff;
  overflow: hidden;
  margin-top: 24px;
}

.window-titlebar {
  background: #f6f8fa;
  border-bottom: 1px solid var(--line);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 7px;
}

.window-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #ff5f56; border: 1px solid #e0443e; }
.dot-yellow { background: #ffbd2e; border: 1px solid #dea123; }
.dot-green { background: #27c93f; border: 1px solid #1aab29; }

.window-title {
  font: 11.5px/1 var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.04em;
  text-align: center;
  flex: 1;
}

.window-status-pill {
  font: 10px/1.4 var(--font-mono);
  background: #eef2f6;
  color: var(--accent);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  font-weight: 550;
  border: 1px solid #dbe2ea;
}

.flagship-body {
  padding: 42px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.15fr);
  gap: 52px;
  align-items: center;
}

.flagship-copy h2 {
  font-family: var(--font-serif);
  font-size: 50px;
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--ink);
  margin: 0 0 8px;
}

.flagship-copy h2 span {
  font-family: var(--font-sans);
  font-size: 24px;
  color: var(--muted);
  margin-left: 12px;
}

.flagship-tagline {
  font-family: var(--font-serif);
  font-size: 26px;
  line-height: 1.25;
  color: var(--ink);
  margin: 14px 0 18px;
}

.flagship-tagline em {
  color: var(--muted);
  font-style: italic;
}

.flagship-description {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 460px;
  margin: 16px 0 24px;
}

.editorial-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin: 22px 0;
}

.flagship-scope {
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.6;
}

/* Score Evidence Display */
.flagship-evidence {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.evidence-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  padding: 12px 18px;
  background: #fbfcfd;
  border-bottom: 1px solid var(--line);
  font: 10px/1.6 var(--font-mono);
  letter-spacing: 0.05em;
  color: var(--muted);
}

.evidence-badge {
  background: var(--accent-light);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.score-display {
  display: block;
  padding: 28px 16px;
  background: #ffffff;
  transition: transform 0.2s ease;
}

.score-display img {
  width: 100%;
  height: auto;
  display: block;
}

.evidence-bottom {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  background: #fbfcfd;
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
}

.evidence-bottom p {
  margin: 0;
  color: var(--ink);
  line-height: 1.5;
}

.evidence-bottom span {
  font-size: 11px;
  color: var(--muted);
  display: block;
}

/* 3-Step Process Track */
.flagship-process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  background: #fcfdfe;
}

.flagship-process li {
  padding: 24px 28px;
}

.flagship-process li + li {
  border-left: 1px solid var(--line);
}

.flagship-process b {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  margin: 8px 0 4px;
}

.flagship-process p {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

/* Pilot Empirical Metrics Bar */
.flagship-metrics-strip {
  border-top: 1px solid var(--line);
  background: #f8fafc;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.metrics-group {
  display: flex;
  align-items: center;
  gap: 36px;
}

.metric-stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.metric-num {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
}

.metric-desc {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}

.flagship-footnote-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
}

/* ==========================================================================
   SELECTED WORKS & BESPOKE AUDIO PLAYER
   ========================================================================== */
.focus-section {
  padding: 56px 0 20px;
}

.section-heading {
  margin-bottom: 32px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
  gap: 20px;
}

.section-heading h2 {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
}

.featured-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #ffffff;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.featured-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.featured-image {
  height: 240px;
  background: #f6f8fa;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  position: relative;
  display: block;
}

.featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.featured-card:hover .featured-image img {
  transform: scale(1.03);
}

.featured-copy {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.featured-copy h3 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
  margin: 10px 0 8px;
  line-height: 1.25;
}

.featured-copy h3 a {
  color: var(--ink);
}

.featured-copy h3 a:hover {
  color: var(--accent);
  text-decoration: none;
}

.featured-copy > p:not(.eyebrow) {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
  margin: 6px 0 14px;
}

/* Prominent Award Badge on Card */
.featured-award-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--award-bg);
  border: 1px solid var(--award-border);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  margin: 10px 0 14px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--award-gold);
  line-height: 1.4;
}

.featured-orchestra-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  margin: 10px 0 14px;
  font-size: 11.5px;
  font-weight: 600;
  color: #334155;
  line-height: 1.4;
}

/* ==========================================================================
   CUSTOM INTERACTIVE AUDIO PLAYER
   ========================================================================== */
.custom-player {
  background: #f9fafb;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.player-main-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.player-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ink);
  color: #ffffff;
  border: 0;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(15, 20, 28, 0.15);
  transition: transform 0.15s ease, background 0.15s ease;
}

.player-btn:hover {
  background: var(--accent);
  transform: scale(1.05);
}

.player-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.player-btn.is-playing .icon-play {
  display: none;
}

.player-btn:not(.is-playing) .icon-pause {
  display: none;
}

.player-waveform-track {
  flex: 1;
  position: relative;
  height: 38px;
  cursor: pointer;
  background: #f1f3f5;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.player-waveform-img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  opacity: 0.35;
  color: #64748b;
  pointer-events: none;
}

.player-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: rgba(11, 78, 162, 0.22);
  border-right: 2px solid var(--accent);
  pointer-events: none;
  transition: width 0.08s linear;
}

.player-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--muted);
  padding: 0 2px;
}

.player-time-indicator {
  letter-spacing: 0.04em;
}

/* Hidden Native Audio Element for accessibility & media API */
.custom-player audio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.feature-link {
  font-size: 12.5px;
  font-weight: 550;
  color: var(--accent);
  margin-top: 14px;
  display: inline-block;
}

/* ==========================================================================
   APPLICATION PATHWAYS (DOSSIER CARDS)
   ========================================================================== */
.application-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.application-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #ffffff;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.application-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.application-card.ma-pathway {
  border-left: 4px solid var(--accent);
}

.application-card.cv-pathway {
  border-left: 4px solid var(--ink);
}

.application-card h3 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
  margin: 10px 0 8px;
  color: var(--ink);
}

.application-card p:not(.eyebrow) {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  margin: 6px 0 16px;
}

.doc-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 11px/1.4 var(--font-mono);
  color: var(--muted);
  background: var(--bg-subtle);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  width: fit-content;
}

.doc-actions {
  display: flex;
  gap: 16px;
  font-size: 13px;
  margin-top: auto;
}

.doc-actions a {
  font-weight: 550;
}

/* ==========================================================================
   RESEARCH TEASER SECTION (MGSA)
   ========================================================================== */
.research-teaser {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 36px 40px;
  margin: 42px 0 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  box-shadow: var(--shadow-sm);
}

.research-teaser h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  margin: 8px 0;
}

.research-teaser p:not(.eyebrow) {
  font-size: 13.5px;
  color: var(--muted);
  margin: 6px 0 0;
}

.research-equation-badge {
  font-family: var(--font-serif);
  font-size: 13px;
  color: #1e293b;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-top: 10px;
}

.research-teaser > a {
  font-size: 13.5px;
  font-weight: 550;
  color: var(--accent);
  white-space: nowrap;
}

/* Footer & Nav links */
.more-work {
  display: flex;
  gap: 28px;
  font-size: 13px;
  flex-wrap: wrap;
  padding: 24px 0 12px;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.more-work a {
  font-weight: 500;
  color: var(--ink-secondary);
}

.more-work a:hover {
  color: var(--accent);
}

/* Clean UI components across pages */
.studio-demo,
.research-cover,
.publication,
.research-gallery a,
.matrix-preview,
.certificate-thumb img,
.professional-credentials,
.innovation-leadership,
.commissioned-grid article,
.document-preview > img {
  background: #ffffff;
  border-color: var(--line);
}

.facts span {
  color: var(--ink-secondary);
  background: #f1f4f8;
  border: 1px solid #e1e6ed;
  font-size: 11px;
}

.work-info h3,
.research-status {
  color: var(--ink);
}

.review-table th {
  background: #f6f8fa;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

/* Xunpu Detail Page Specifics */
.xunpu-intro {
  padding: 42px 0 20px;
}

.xunpu-intro h1 {
  font-family: var(--font-serif);
  font-size: 64px;
  font-weight: 400;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 12px 0 28px;
}

.xunpu-intro h1 span {
  font-family: var(--font-sans);
  font-size: 24px;
  color: var(--muted);
  margin-left: 14px;
}

.xunpu-intro-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 32px 36px;
  margin-bottom: 32px;
}

.xunpu-tagline {
  font-family: var(--font-serif);
  font-size: 32px;
  line-height: 1.25;
  color: var(--ink);
  margin: 0;
}

.xunpu-tagline em {
  color: var(--muted);
  font-style: italic;
}

.project-index {
  display: flex;
  gap: 24px;
  background: #f8fafc;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  padding: 16px 24px;
  font: 11.5px/1.6 var(--font-mono);
  flex-wrap: wrap;
}

.project-index a {
  color: var(--ink-secondary);
  font-weight: 500;
}

.case-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.case-tabs button {
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  padding: 16px 24px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.case-tabs button:first-child {
  padding-left: 0;
}

.case-tabs button[aria-selected="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.case-content blockquote {
  background: #f8fafc;
  border-left: 3px solid var(--accent);
  padding: 18px 24px;
  margin: 24px 0 0;
}

.case-content blockquote p {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.5;
}

.pilot-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  background: #fcfdfe;
}

.pilot-metrics > div {
  padding: 28px 32px;
}

.pilot-metrics > div + div {
  border-left: 1px solid var(--line);
}

.pilot-metrics b {
  display: block;
  font-family: var(--font-serif);
  font-size: 52px;
  line-height: 1;
  letter-spacing: -0.03em;
  font-weight: 400;
  color: var(--ink);
}

.pilot-metrics span {
  display: block;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 10px;
  font-family: var(--font-mono);
}

.system-route {
  list-style: none;
  padding: 0;
  margin: 30px 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.system-route li {
  padding: 22px 18px;
  background: #ffffff;
}

.system-route li + li {
  border-left: 1px solid var(--line);
}

.system-route .system-hub {
  background: var(--ink);
  color: #ffffff;
}

.system-route .system-hub .mono,
.system-route .system-hub p {
  color: #cbd5e1;
}

.system-route .system-hub b {
  color: #ffffff;
}

/* ==========================================================================
   RESPONSIVE LAYOUT
   ========================================================================== */
@media (max-width: 1050px) {
  .site-header nav {
    gap: 16px;
    font-size: 13px;
  }
  .focus-hero {
    gap: 32px;
  }
  .flagship-body {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 32px;
  }
  .flagship-copy h2 {
    font-size: 42px;
  }
  .featured-grid {
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .site-header,
  main,
  .site-footer {
    width: calc(100% - 36px);
  }
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 0;
    gap: 14px;
  }
  .site-header nav {
    flex-wrap: wrap;
    gap: 8px 16px;
    font-size: 12px;
  }
  .focus-hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px 0 40px;
  }
  .hero-portrait-card {
    max-width: 180px;
  }
  .hero-portrait-card img {
    height: 220px;
  }
  .focus-hero h1 {
    font-size: 38px;
  }
  .focus-hero h1 span {
    font-size: 20px;
    margin-left: 8px;
  }
  .hero-motto {
    font-size: 18px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .flagship-body {
    padding: 24px 20px;
  }
  .flagship-copy h2 {
    font-size: 34px;
  }
  .flagship-tagline {
    font-size: 22px;
  }
  .flagship-process {
    grid-template-columns: 1fr;
  }
  .flagship-process li + li {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .metrics-group {
    gap: 20px;
  }
  .metric-num {
    font-size: 22px;
  }
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .application-grid {
    grid-template-columns: 1fr;
  }
  .research-teaser {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 20px;
  }
  .pilot-metrics {
    grid-template-columns: 1fr;
  }
  .pilot-metrics > div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .system-route {
    grid-template-columns: 1fr;
  }
  .hero-motto span {
    display: block;
    margin-left: 0;
    margin-top: 4px;
    font-size: 13px;
  }
  .window-status-pill {
    display: none;
  }
  .window-title {
    display: none;
  }
  .hero-award-callout {
    font-size: 11px;
    padding: 7px 10px;
    flex-wrap: wrap;
  }
}

/* Deployment check: preserve image ratios and fit the Xunpu case on phones. */
.xunpu-page img {
  height: auto;
}
.xunpu-intro-row > * {
  min-width: 0;
}
@media (max-width: 768px) {
  .xunpu-intro-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
  .recording-layout video {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
  }
}

.application-card.ps-pathway { border-left: 4px solid var(--accent); }

#cv-preview > img,
#ps-preview > img {
  display: block;
  width: min(100%, 600px);
  max-height: none;
  height: auto;
}

.application-card.ps-pathway { border-left: 4px solid var(--accent); }