@font-face {
  font-family: "Heading Serif";
  src: url("fonts/serif-heading.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --paper: #f3efe8;
  --card: #fbf9f5;
  --ink: #161616;
  --ink-2: #3d3934;
  --muted: #6b645c;
  --line: #ddd5ca;
  --line-strong: #c4b9ab;
  --accent: #ff5b1f;
  --accent-ink: #b5400d;
  --accent-soft: #ffd9c7;
  --serif: "Heading Serif", "Songti SC", "STSong", "Noto Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --content: 1180px;
  --gutter: 28px;
  --bar: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--bar) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent-soft); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
svg { flex-shrink: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 2px; }
.serif { font-family: var(--serif); font-weight: 700; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 100; padding: 10px 18px; color: var(--paper); background: var(--ink); }
.skip-link:focus { top: 12px; }
.scroll-progress { position: fixed; inset: 0 0 auto; height: 2px; background: var(--accent); transform: scaleX(var(--scroll, 0)); transform-origin: left; z-index: 60; pointer-events: none; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 20px; border: 1px solid var(--ink); border-radius: 999px; font-size: 15px; font-weight: 600; line-height: 1.2; white-space: nowrap; transition: transform 160ms, background-color 160ms, color 160ms, border-color 160ms; }
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: transform 160ms; }
.btn-accent { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ghost { background: rgba(243, 239, 232, .7); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { transform: translateY(-2px); }
  .btn-accent:hover { background: #ff7440; border-color: #ff7440; }
  .btn-ink:hover { background: #2e2b28; }
  .btn-ghost:hover { background: var(--ink); color: var(--paper); }
  .btn:hover svg { transform: translateX(2px); }
}

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 50; height: var(--bar); display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 max(var(--gutter), calc((100% - var(--content)) / 2)); background: rgba(243, 239, 232, .88); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.wordmark { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.mark { position: relative; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 8px; background: var(--ink); color: var(--paper); font: 700 20px/1 var(--serif); }
.mark::after { content: ""; position: absolute; right: -3px; bottom: -3px; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); border: 2px solid var(--paper); }
.wordmark-text { display: flex; flex-direction: column; font-size: 16px; font-weight: 700; line-height: 1.3; }
.wordmark-text small { font-size: 11px; font-weight: 500; color: var(--muted); }
.navlinks { display: flex; gap: 32px; font-size: 14px; color: var(--muted); }
.navlinks a { position: relative; padding: 8px 0; white-space: nowrap; transition: color 160ms; }
.navlinks a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 180ms; }
.navlinks a:hover, .navlinks a[aria-current] { color: var(--ink); }
.navlinks a:hover::after, .navlinks a[aria-current]::after { transform: scaleX(1); }
.topbar-cta { min-height: 40px; padding: 8px 18px; font-size: 14px; }

/* Hero */
.hero { position: relative; isolation: isolate; overflow: hidden; display: flex; align-items: center; min-height: min(720px, calc(100vh - var(--bar))); min-height: min(720px, calc(100svh - var(--bar))); border-bottom: 1px solid var(--line); }
.hero-image { position: absolute; top: 0; right: 0; height: 100%; width: 72%; object-fit: cover; object-position: 75% 45%; filter: grayscale(1) contrast(1.08); mix-blend-mode: multiply; opacity: .5; z-index: -3; -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 45%); mask-image: linear-gradient(90deg, transparent 0, #000 45%); }
#circuit-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: -2; }
.hero-inner { width: min(var(--content), calc(100% - 2 * var(--gutter))); margin: 0 auto; padding: 72px 0 80px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 26px; font: 500 13px/1.5 var(--sans); color: var(--accent-ink); letter-spacing: .08em; }
.pulse { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.pulse::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid var(--accent); animation: pulse 2.4s ease-out infinite; }
@keyframes pulse { from { transform: scale(.6); opacity: 1; } to { transform: scale(1.8); opacity: 0; } }
h1 { margin: 0; max-width: 13em; font-size: clamp(38px, 5.6vw, 72px); line-height: 1.22; letter-spacing: -.01em; }
em { font-style: normal; color: var(--accent-ink); background: linear-gradient(transparent 62%, var(--accent-soft) 62%, var(--accent-soft) 92%, transparent 92%); padding: 0 .06em; }
.lead { max-width: 33em; margin: 26px 0 0; font-size: 17px; line-height: 1.9; color: var(--ink-2); }
.hero-track { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 26px 0 0; font-size: 13px; }
.hero-track span { margin-right: 6px; color: var(--muted); }
.hero-track strong { padding: 3px 12px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(251, 249, 245, .8); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-where { margin: 22px 0 0; font: 12px/1.6 var(--mono); color: var(--muted); letter-spacing: .04em; }
.motion-toggle { position: absolute; right: max(var(--gutter), calc((100% - var(--content)) / 2)); bottom: 18px; display: grid; place-items: center; width: 34px; height: 34px; padding: 0; border: 1px solid var(--line-strong); border-radius: 50%; background: rgba(243, 239, 232, .85); }
.motion-toggle svg { width: 15px; height: 15px; fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.motion-toggle .icon-play { fill: var(--ink); stroke: none; }
.motion-toggle[aria-pressed="true"] .icon-pause, .motion-toggle[aria-pressed="false"] .icon-play { display: none; }
.motion-toggle:hover { border-color: var(--accent); }

/* Stats */
.stats { width: min(var(--content), calc(100% - 2 * var(--gutter))); margin: 0 auto; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-bottom: 1px solid var(--line); }
.stat { display: flex; flex-direction: column; justify-content: flex-start; gap: 14px; min-width: 0; padding: 34px 28px; border-left: 1px solid var(--line); }
.stat:first-child { padding-left: 0; border-left: 0; }
.stat:last-child { padding-right: 0; }
.stat strong { display: flex; align-items: flex-end; min-height: 58px; font-size: 26px; line-height: 1.2; color: var(--ink); }
.stat > span { font-size: 13px; line-height: 1.7; color: var(--muted); }
.dot-num { font: 700 56px/1 var(--mono); color: var(--accent-ink); font-variant-numeric: tabular-nums; }
.dot-num svg { display: block; height: 56px; width: auto; overflow: visible; }
.dot-num .on { fill: var(--accent); }
.dot-num .off { fill: var(--accent); opacity: .11; }

/* Sections */
.page { width: min(var(--content), calc(100% - 2 * var(--gutter))); margin: 0 auto; }
.section { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 32px 64px; padding: 96px 0; border-bottom: 1px solid var(--line); }
.section:last-child { border-bottom: 0; }
.section-head { align-self: start; position: sticky; top: calc(var(--bar) + 36px); }
.kicker { margin: 0 0 14px; font: 500 12px/1.5 var(--mono); color: var(--accent-ink); letter-spacing: .06em; }
h2 { margin: 0; font-size: 36px; line-height: 1.35; }
h3 { margin: 0; }

.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.service { position: relative; padding: 26px 24px 28px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); transition: transform 200ms, border-color 200ms, box-shadow 200ms; }
.service-no { display: block; margin-bottom: 40px; font: 700 34px/1 var(--serif); color: var(--accent); }
.service h3 { font-size: 19px; line-height: 1.4; }
.service p { margin: 10px 0 0; font-size: 14px; line-height: 1.85; color: var(--ink-2); }
@media (hover: hover) and (pointer: fine) {
  .service:hover, .contest:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: 0 14px 30px -18px #3d2a1a40; }
}
.fit { grid-column: 2; display: flex; gap: 14px; align-items: baseline; margin: 0; padding-top: 4px; font-size: 15px; color: var(--ink-2); }
.fit b, .principle b { font-weight: 650; color: var(--ink); }
.fit b { flex-shrink: 0; padding: 1px 10px; border-radius: 999px; background: var(--ink); color: var(--paper); font-size: 12px; }

.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.step { position: relative; display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 20px; padding: 26px 0; border-top: 1px solid var(--line); }
.step:first-child { padding-top: 0; border-top: 0; }
.step:last-child { padding-bottom: 0; }
.step-no { font: 700 44px/1 var(--serif); color: var(--accent); }
.step h3 { font-size: 20px; line-height: 1.4; }
.step p { margin: 8px 0 0; max-width: 36em; font-size: 15px; color: var(--ink-2); }
.principle { grid-column: 2; margin: 0; padding: 18px 22px; border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; background: var(--card); font-size: 15px; color: var(--ink-2); }

.award-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.contest { position: relative; overflow: hidden; padding: 24px 26px 26px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); transition: transform 200ms, border-color 200ms, box-shadow 200ms; }
.contest::before { content: ""; position: absolute; inset: 0 0 auto; height: 3px; background: var(--accent); transform: scaleX(.18); transform-origin: left; transition: transform 300ms; }
.contest:hover::before { transform: scaleX(1); }
.contest-tag { display: inline-block; margin: 0; padding: 0 10px; border: 1px solid var(--line-strong); border-radius: 999px; font-size: 12px; color: var(--muted); }
.contest h3 { margin: 30px 0 4px; font: 700 40px/1.15 var(--serif); }
.contest-name { margin: 0; font-size: 14px; color: var(--muted); }
.contest-result { display: flex; align-items: center; gap: 8px; margin: 18px 0 0; font-size: 15px; font-weight: 650; color: var(--accent-ink); }
.contest-result::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

.mentor { display: grid; gap: 44px; }
.mentor-intro { margin: 0; font-size: 19px; line-height: 1.95; color: var(--ink); }
.block-title { margin-bottom: 14px; font-size: 13px; font-weight: 600; color: var(--muted); letter-spacing: .06em; }
.exp, .honors { list-style: none; margin: 0; padding: 0; }
.exp li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 14px 0; border-top: 1px solid var(--line); font-size: 15px; }
.exp li:last-child { border-bottom: 1px solid var(--line); }
.exp b { font-weight: 600; }
.exp span { color: var(--muted); text-align: right; }
.honors { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 32px; }
.honors li { display: grid; grid-template-columns: 46px minmax(0, 1fr); padding: 13px 0; border-top: 1px solid var(--line); font-size: 14px; line-height: 1.6; }
.honors time { grid-row: span 2; font: 12px/1.9 var(--mono); color: var(--accent-ink); }
.honors b { font-weight: 600; }
.honors span { font-size: 13px; color: var(--muted); }
.tools { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0; }
.tools div { padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.tools dt { font-size: 12px; color: var(--muted); }
.tools dd { margin: 4px 0 0; font-size: 14px; font-weight: 550; line-height: 1.6; }

/* Cases (hidden until populated) */
.case-list { display: grid; gap: 32px; }
.case { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.case-media { margin: 0; }
.case-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 12px; background: var(--line); }
.case-media figcaption { margin-top: 8px; font-size: 12px; color: var(--muted); }
.case-content h3 { margin: 8px 0; font-size: 22px; }
.case-meta, .case-result { margin: 0; font-size: 13px; color: var(--accent-ink); }
.case-content dl { margin: 18px 0 0; font-size: 14px; }
.case-content dt { margin-top: 12px; font-weight: 650; }
.case-content dd { margin: 4px 0 0; color: var(--ink-2); }

/* Contact */
.contact { background: var(--ink); color: var(--paper); }
.contact-inner { width: min(var(--content), calc(100% - 2 * var(--gutter))); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px 80px; align-items: center; padding: 96px 0; }
.contact .kicker { color: var(--accent); }
.contact h2 { font-size: clamp(32px, 4vw, 48px); }
.contact-copy > p:not(.kicker) { max-width: 30em; margin: 18px 0 0; color: #cfc7bc; font-size: 16px; }
.contact .hero-where { color: #9d958a; }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: grid; grid-template-columns: 52px minmax(0, 1fr) auto; align-items: center; gap: 14px; min-height: 74px; padding: 12px 0; border-top: 1px solid #3a3632; }
.contact-list li:last-child { border-bottom: 1px solid #3a3632; }
.contact-label { font-size: 13px; color: #9d958a; }
.contact-value { font-size: 21px; font-weight: 600; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; transition: color 160ms; }
.contact-value:hover { color: var(--accent); }
.copy { min-height: 36px; padding: 6px 14px; border: 1px solid #4a4540; border-radius: 999px; background: transparent; color: var(--paper); font-size: 13px; transition: border-color 160ms, color 160ms; }
.copy:hover { border-color: var(--accent); color: var(--accent); }
.contact-note { font-size: 13px; color: #9d958a; }

.footer { width: min(var(--content), calc(100% - 2 * var(--gutter))); margin: 0 auto; display: flex; justify-content: space-between; gap: 20px; padding: 28px 0; font-size: 12px; color: var(--muted); }
.footer a:hover { color: var(--ink); }

.mobile-bar { display: none; }
.toast { position: fixed; left: 50%; bottom: 32px; z-index: 80; margin: 0; padding: 10px 18px; border-radius: 999px; background: var(--ink); color: var(--paper); font-size: 14px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; transition: opacity 200ms, transform 200ms; }
.toast.is-shown { opacity: 1; transform: translate(-50%, 0); }

.reveal { transition: opacity 600ms cubic-bezier(.2, .7, .2, 1), transform 600ms cubic-bezier(.2, .7, .2, 1); }
.reveal.is-pending { opacity: 0; transform: translateY(18px); }

@media (max-width: 1080px) {
  .section { grid-template-columns: 250px minmax(0, 1fr); gap: 28px 40px; }
  h2 { font-size: 30px; }
  .service-grid { grid-template-columns: 1fr; }
  .service { display: grid; grid-template-columns: 48px minmax(0, 1fr); column-gap: 12px; }
  .service-no { grid-row: span 2; margin: 0; }
  .service p { margin-top: 6px; }
  .tools { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 30px 20px; }
}

@media (max-width: 760px) {
  :root { --gutter: 16px; --bar: 60px; }
  .navlinks { display: none; }
  .topbar { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--paper); }
  .topbar-cta { min-height: 38px; padding: 6px 16px; }
  .mark { width: 32px; height: 32px; font-size: 18px; }
  .hero { min-height: 0; align-items: flex-start; }
  .hero-image { width: 100%; height: 46%; top: auto; bottom: 0; object-position: 70% 50%; opacity: .32; -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 60%); mask-image: linear-gradient(180deg, transparent 0, #000 60%); }
  .hero-inner { padding: 44px 0 64px; }
  .eyebrow { margin-bottom: 18px; font-size: 12px; }
  h1 { font-size: clamp(31px, 8.6vw, 44px); }
  .lead { margin-top: 18px; font-size: 16px; }
  .hero-actions { margin-top: 26px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .motion-toggle { bottom: 14px; width: 30px; height: 30px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 24px 14px !important; border-bottom: 1px solid var(--line); }
  .stat:nth-child(odd) { padding-left: 0 !important; border-left: 0; }
  .stat:nth-child(even) { padding-right: 0 !important; }
  .stat:nth-last-child(-n+2) { border-bottom: 0; }
  .stat strong { min-height: 42px; font-size: 20px; }
  .dot-num, .dot-num svg { height: 42px; font-size: 42px; }
  .stat > span { font-size: 12px; }
  .section { grid-template-columns: 1fr; gap: 28px; padding: 60px 0; }
  .section-head { position: static; }
  .kicker { margin-bottom: 10px; }
  h2 { font-size: 27px; }
  .fit, .principle { grid-column: 1; }
  .fit { flex-direction: column; gap: 8px; }
  .service { padding: 20px 18px; }
  .step { grid-template-columns: 56px minmax(0, 1fr); gap: 12px; padding: 22px 0; }
  .step-no { font-size: 34px; }
  .step h3 { font-size: 18px; }
  .award-grid { gap: 10px; }
  .contest { padding: 18px 16px 20px; border-radius: 14px; }
  .contest h3 { margin-top: 22px; font-size: 30px; }
  .contest-name { font-size: 12px; }
  .contest-result { font-size: 13px; margin-top: 12px; }
  .mentor { gap: 36px; }
  .mentor-intro { font-size: 16px; }
  .exp li { flex-direction: column; gap: 2px; }
  .exp span { text-align: left; font-size: 14px; }
  .honors { grid-template-columns: 1fr; }
  .tools { gap: 8px; }
  .tools div { padding: 12px 14px; }
  .case { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; gap: 32px; padding: 64px 0; }
  .contact-list li { grid-template-columns: 40px minmax(0, 1fr) auto; gap: 10px; min-height: 64px; }
  .contact-value { font-size: 17px; }
  .contact-note { display: none; }
  .footer { flex-direction: column; gap: 6px; padding-bottom: calc(100px + env(safe-area-inset-bottom)); }
  .mobile-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 70; display: grid; grid-template-columns: 1fr 1.4fr; gap: 10px; padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom)); background: rgba(243, 239, 232, .94); border-top: 1px solid var(--line); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); transform: translateY(110%); transition: transform 240ms; }
  .mobile-bar.is-visible { transform: none; }
  .mobile-bar .btn { min-height: 46px; }
  .toast { bottom: calc(86px + env(safe-area-inset-bottom)); }
}

@media (max-width: 370px) {
  .wordmark-text small { display: none; }
  .hero-track span { width: 100%; }
  .award-grid { grid-template-columns: 1fr; }
  .tools { grid-template-columns: 1fr; }
  .contest h3 { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal.is-pending { opacity: 1; transform: none; }
}

@page { size: A4; margin: 14mm 15mm; }
@media print {
  body { background: #fff; font-size: 12px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .topbar, .scroll-progress, .hero-image, #circuit-canvas, .motion-toggle, .hero-actions, .mobile-bar, .toast, .copy, .footer, .skip-link { display: none !important; }
  .reveal.is-pending { opacity: 1 !important; transform: none !important; }
  .hero { min-height: 0; display: block; }
  .hero-inner, .stats, .page, .contact-inner { width: 100%; padding: 0; }
  .hero-inner { padding-bottom: 18px; }
  h1 { font-size: 30px; max-width: none; }
  .lead { font-size: 13px; }
  .section { display: block; padding: 22px 0; break-inside: avoid-page; }
  .section-head { position: static; margin-bottom: 14px; }
  h2 { font-size: 20px; }
  h2 br { display: none; }
  .service-grid { grid-template-columns: repeat(3, 1fr); }
  .service, .contest, .step, .honors li { break-inside: avoid; }
  .contact { background: #fff; color: var(--ink); border-top: 2px solid var(--ink); }
  .contact-inner { display: block; padding-top: 18px; }
  .contact-copy > p:not(.kicker), .contact-label, .contact .hero-where { color: var(--muted); }
  .contact-list li { border-color: var(--line) !important; min-height: 0; }
}