:root {
  --bg: #f7f8fa;
  --bg-2: #eef1f4;
  --surface: #ffffff;
  --text: #0f1720;
  --muted: #56616e;
  --border: #e2e6eb;
  --accent: #0f766e;
  --accent-2: #0e7490;
  --accent-soft: rgba(15, 118, 110, .09);
  --shadow: 0 1px 2px rgba(15, 23, 32, .04), 0 8px 24px rgba(15, 23, 32, .06);
  --radius: 16px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0f14; --bg-2: #0f151c; --surface: #121a22; --text: #e6edf3; --muted: #93a1b0;
    --border: #1f2a35; --accent: #2dd4bf; --accent-2: #38bdf8; --accent-soft: rgba(45, 212, 191, .1);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px rgba(0, 0, 0, .25);
  }
}
:root[data-theme="dark"] {
  --bg: #0b0f14; --bg-2: #0f151c; --surface: #121a22; --text: #e6edf3; --muted: #93a1b0;
  --border: #1f2a35; --accent: #2dd4bf; --accent-2: #38bdf8; --accent-soft: rgba(45, 212, 191, .1);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px rgba(0, 0, 0, .25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.65;
  color: var(--text); background: var(--bg);
  background-image: radial-gradient(1100px 520px at 85% -10%, var(--accent-soft), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
code { font-family: var(--mono); font-size: .88em; background: var(--accent-soft); padding: .1em .35em; border-radius: 5px; }

.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap { padding: 0 28px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 100; background: var(--surface); padding: 8px 12px; border-radius: 8px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px); -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand {
  font-weight: 800; letter-spacing: .02em; color: var(--text);
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-size: 14px;
}
.brand:hover { text-decoration: none; }
.nav-links { display: none; list-style: none; margin: 0 0 0 auto; padding: 0; gap: 4px; }
.nav-links a { color: var(--muted); font-size: 14.5px; font-weight: 500; padding: 6px 10px; border-radius: 8px; }
.nav-links a:hover { color: var(--text); background: var(--accent-soft); text-decoration: none; }
@media (min-width: 760px) { .nav-links { display: flex; } }
.theme-toggle {
  margin-left: auto; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer; display: grid; place-items: center;
}
@media (min-width: 760px) { .theme-toggle { margin-left: 8px; } }
.lang-toggle {
  margin-left: auto; height: 38px; min-width: 38px; padding: 0 10px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer; font: 600 13.5px/1 var(--font);
}
.lang-toggle:hover, .theme-toggle:hover { background: var(--accent-soft); }
.lang-toggle + .theme-toggle { margin-left: 0; }
@media (min-width: 760px) { .lang-toggle { margin-left: 8px; } }
:lang(zh) { --font: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", "Segoe UI", Roboto, sans-serif; }
:root:lang(zh) body { line-height: 1.75; }
.theme-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none; }
  :root:not([data-theme="light"]) .i-moon { display: block; }
}

/* Hero */
.hero { display: grid; gap: 36px; align-items: center; padding-top: 56px; padding-bottom: 32px; }
@media (min-width: 860px) { .hero { grid-template-columns: 1.35fr 1fr; gap: 56px; padding-top: 88px; padding-bottom: 48px; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 14px; font-size: 13.5px; font-weight: 600;
  color: var(--muted); background: var(--surface); border: 1px solid var(--border); padding: 5px 12px; border-radius: 999px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 3px rgba(34, 197, 94, .18); }
h1 { font-size: clamp(2.5rem, 6vw, 4rem); line-height: 1.05; letter-spacing: -.03em; margin: 0 0 12px; font-weight: 800; }
.role {
  margin: 0 0 18px; font-size: clamp(1.02rem, 2.2vw, 1.2rem); font-weight: 600;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { color: var(--muted); font-size: 1.075rem; max-width: 58ch; margin: 0 0 26px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 11px; font-weight: 600; font-size: 15px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: var(--accent); }
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; }
.btn-primary:hover { border-color: transparent; }
:root[data-theme="dark"] .btn-primary { color: #04201d; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #04201d; } }

.portrait { margin: 0; justify-self: center; position: relative; width: min(340px, 78vw); }
.portrait::before {
  content: ""; position: absolute; inset: -10px; border-radius: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); opacity: .22; filter: blur(22px);
}
.portrait img {
  position: relative; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 28px;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}

/* Stats */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; padding-bottom: 24px; }
@media (min-width: 760px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; box-shadow: var(--shadow); }
.stat strong { display: block; font-size: 1.15rem; letter-spacing: -.01em; }
.stat span { color: var(--muted); font-size: 13.5px; }

/* Sections */
.section { padding-top: 56px; scroll-margin-top: 70px; }
.section-title { display: flex; align-items: baseline; gap: 12px; font-size: 1.6rem; letter-spacing: -.02em; margin: 0 0 22px; }
.section-title span { font-family: var(--mono); font-size: .8rem; color: var(--accent); font-weight: 600; }
.prose { max-width: 72ch; color: var(--muted); font-size: 1.05rem; }
.prose strong { color: var(--text); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
@media (min-width: 640px) { .card { padding: 28px; } }
.card h3 { margin: 0; font-size: 1.1rem; letter-spacing: -.01em; }

.job-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; align-items: flex-start; margin-bottom: 10px; }
.org { margin: 2px 0 0; color: var(--muted); font-weight: 500; }
.when {
  margin: 0; font-family: var(--mono); font-size: 13px; color: var(--accent);
  background: var(--accent-soft); padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.job-summary { color: var(--muted); margin: 6px 0 14px; }
.bullets { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 10px; }
.bullets li { position: relative; padding-left: 22px; color: var(--muted); }
.bullets li::before {
  content: ""; position: absolute; left: 4px; top: .7em; width: 7px; height: 7px; border-radius: 2px;
  background: var(--accent); transform: rotate(45deg);
}
.bullets li strong { color: var(--text); }
.bullets.small { gap: 6px; font-size: .96rem; margin: 12px 0 16px; }

.skills-grid { display: grid; gap: 14px; }
@media (min-width: 640px) { .skills-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .skills-grid { grid-template-columns: repeat(3, 1fr); } }
.skill h3 { font-size: .98rem; margin-bottom: 12px; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 7px; }
.chips li {
  font-size: 13px; font-weight: 500; padding: 4px 10px; border-radius: 999px;
  background: var(--bg-2); border: 1px solid var(--border); color: var(--text);
}

.projects { display: grid; gap: 16px; }
@media (min-width: 860px) { .projects { grid-template-columns: 1fr 1fr; } }
.project p { color: var(--muted); }
.kicker { margin: 0 0 6px; font-family: var(--mono); font-size: 12.5px; color: var(--accent) !important; text-transform: uppercase; letter-spacing: .08em; }
.project h3 { margin-bottom: 8px; }

.contact-card { text-align: center; padding: 40px 22px; background:
  linear-gradient(var(--surface), var(--surface)) padding-box,
  linear-gradient(135deg, var(--accent), var(--accent-2)) border-box; border: 1px solid transparent; }
.contact-card h2 { margin: 0 0 8px; font-size: 1.8rem; letter-spacing: -.02em; }
.contact-card p { color: var(--muted); max-width: 52ch; margin: 0 auto 22px; }
.contact-card .cta { justify-content: center; }
.contact-card .btn { max-width: 100%; overflow-wrap: anywhere; }

.footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 48px; padding-bottom: 40px;
  color: var(--muted); font-size: 14px;
}
.footer p { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}
@media print {
  .topbar, .theme-toggle, .skip, .footer a { display: none; }
  body { background: #fff; }
  .card, .stat, .btn { box-shadow: none; }
}
.alt-name { display: inline-block; font-size: .5em; font-weight: 600; color: var(--muted); letter-spacing: 0; }