:root{
  --font: system-ui, -apple-system, "Segoe UI", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --bg: #0b1020;
  --surface: rgba(255,255,255,.06);
  --surface-2: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.72);
  --soft: rgba(255,255,255,.60);
  --primary: #6ee7ff;
  --primary-2: #a78bfa;
  --shadow: 0 16px 40px rgba(0,0,0,.30);
  --ring: 0 0 0 4px rgba(110, 231, 255, .18);
  --radius: 18px;
  --container: 1120px;
}

[data-theme="light"]{
  --bg: #f6f7fb;
  --surface: rgba(18, 24, 40, .04);
  --surface-2: rgba(18, 24, 40, .06);
  --border: rgba(18, 24, 40, .10);
  --text: rgba(18, 24, 40, .92);
  --muted: rgba(18, 24, 40, .72);
  --soft: rgba(18, 24, 40, .60);
  --primary: #0ea5e9;
  --primary-2: #7c3aed;
  --shadow: 0 18px 40px rgba(18, 24, 40, .12);
  --ring: 0 0 0 4px rgba(14, 165, 233, .16);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font);
  background: radial-gradient(1200px 800px at 20% 10%, rgba(110,231,255,.12), transparent 60%),
              radial-gradient(1000px 700px at 85% 20%, rgba(167,139,250,.12), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a{ color: inherit; text-decoration: none; }
img{ max-width:100%; height:auto; display:block; }

.skip-link{
  position:absolute;
  left:-9999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left:16px;
  top:16px;
  width:auto;
  height:auto;
  padding:10px 12px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 9999;
}

.container{
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.header{
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
  padding: 12px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 120px;
}
.brand__dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--primary) 20%, transparent);
}
.brand__text{
  font-weight: 700;
  letter-spacing: .2px;
}

.nav{
  display:flex;
  align-items:center;
  gap: 10px;
}
.nav__toggle{
  display:none;
  border:1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
  cursor:pointer;
}
.nav__menu{
  display:flex;
  align-items:center;
  gap: 14px;
  padding: 6px 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.nav__menu a{
  font-size: 13px;
  color: var(--muted);
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  transition: background .15s ease, color .15s ease;
}
.nav__menu a:hover{
  background: var(--surface-2);
  color: var(--text);
}
.nav__menu a.is-active{
  background: color-mix(in srgb, var(--primary) 14%, var(--surface-2));
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--border));
}

.header__actions{
  display:flex;
  align-items:center;
  gap: 10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  border-radius: 14px;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 13px;
  border: 1px solid var(--border);
  cursor:pointer;
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
  user-select:none;
}
.btn:active{ transform: translateY(1px); }
.btn--primary{
  border-color: color-mix(in srgb, var(--primary) 42%, var(--border));
  background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 30%, var(--surface)), color-mix(in srgb, var(--primary-2) 28%, var(--surface)));
  box-shadow: 0 12px 28px rgba(0,0,0,.20);
}
.btn--ghost{
  background: var(--surface);
}
.btn--sm{
  padding: 8px 10px;
  border-radius: 12px;
}
.btn:focus-visible{
  outline: none;
  box-shadow: var(--ring);
}

.hero{
  padding: 42px 0 18px;
}
.hero__inner{
  display:grid;
  grid-template-columns: 1.4fr .9fr;
  gap: 18px;
  align-items: start;
}
.hero__content{
  padding: 18px 0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 14px;
}
.hero__title{
  margin: 0 0 14px;
  line-height: 1.15;
  letter-spacing: -.2px;
  font-size: clamp(28px, 2.7vw, 44px);
}
.hero__subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
}
.hero__cta{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.stats{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
}
.stat{
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 12px 12px;
  box-shadow: var(--shadow);
}
.stat__value{
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .2px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat__label{
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.hero__card{
  position: sticky;
  top: 78px;
}

.section{
  padding: 44px 0;
}
.section[id]{
  scroll-margin-top: 92px;
}
.section--alt{
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--surface) 60%, transparent), transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.section__title{
  margin: 0;
  font-size: 22px;
  letter-spacing: .2px;
}
.section__subtitle{
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.grid{
  display:grid;
  gap: 12px;
}
.grid--2{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3{ grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card{
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px 16px;
  box-shadow: var(--shadow);
}
.card--glass{
  background: color-mix(in srgb, var(--surface) 74%, transparent);
}
.card__kicker{
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}
.card__title{
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: .1px;
}
.card__text{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.card__actions{
  display:flex;
  gap: 10px;
  margin-top: 12px;
}
.card__footer{
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.checklist{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
}
.checklist li{ margin: 8px 0; }

.bullets{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13.5px;
}
.bullets li{ margin: 8px 0; }

.tags{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  margin-top: 12px;
}
.tags--lg .tag{
  padding: 10px 12px;
  font-size: 13px;
}
.tag{
  display:inline-flex;
  align-items:center;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
}

.timeline{
  display:grid;
  gap: 12px;
}
.timeline__meta{
  display:grid;
  grid-template-columns: 160px 120px 1fr;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 8px;
}
.timeline__time{ color: var(--soft); font-size: 12px; }
.timeline__role{ font-weight: 700; }
.timeline__company{ color: var(--muted); font-size: 13px; }

.mini-stats{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
}
.mini-stat{
  display:flex;
  justify-content:space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.mini-stat__k{ color: var(--muted); font-size: 12px; }
.mini-stat__v{ font-weight: 800; }

.pill{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  font-size: 12px;
}

.note{
  margin-top: 12px;
  border: 1px dashed var(--border);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.note__text{
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.muted{ color: var(--muted); }

.accordion{
  display:grid;
  gap: 10px;
}
.accordion__item{
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2px 10px;
  box-shadow: var(--shadow);
}
.accordion__item > summary{
  cursor: pointer;
  padding: 12px 8px;
  list-style: none;
  font-weight: 700;
}
.accordion__item > summary::-webkit-details-marker{ display:none; }
.accordion__content{
  padding: 0 8px 12px;
  color: var(--muted);
  font-size: 13.5px;
}

.image-frame{
  margin-top: 12px;
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.image-frame img{
  width: 100%;
  height: auto;
}

.contact-list{
  display:grid;
  gap: 10px;
}
.contact-item{
  display:grid;
  grid-template-columns: 72px 1fr;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 14px;
}
.contact-item__k{
  font-size: 12px;
  color: var(--muted);
}
.contact-item__v{
  font-size: 13px;
  color: var(--text);
}

.linklike{
  appearance:none;
  background:none;
  border:none;
  padding:0;
  margin:0;
  color: inherit;
  cursor: pointer;
  font: inherit;
  text-align:left;
  border-bottom: 1px dashed color-mix(in srgb, var(--primary) 55%, var(--border));
}
.linklike:hover{
  color: color-mix(in srgb, var(--primary) 75%, var(--text));
}
.linklike:focus-visible{
  outline:none;
  box-shadow: var(--ring);
  border-radius: 10px;
  padding: 2px 6px;
  margin-left: -6px;
}

.toast{
  margin-top: 10px;
  min-height: 20px;
  color: var(--muted);
  font-size: 12px;
}

.backtop{
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  color: var(--text);
  box-shadow: var(--shadow);
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .16s ease, transform .16s ease;
}
.backtop.is-visible{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.backtop:focus-visible{
  outline: none;
  box-shadow: var(--ring);
}

.footer{
  padding: 24px 0 10px;
}
.footer__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  color: var(--muted);
  font-size: 12px;
}
.footer__meta{ color: var(--soft); }

@media (max-width: 980px){
  .hero__inner{ grid-template-columns: 1fr; }
  .hero__card{ position: static; }
  .grid--3{ grid-template-columns: 1fr; }
  .grid--2{ grid-template-columns: 1fr; }
  .stats{ grid-template-columns: 1fr; }
  .timeline__meta{ grid-template-columns: 1fr; }
  .nav__toggle{ display:inline-flex; }
  .nav__menu{
    display:none;
    position:absolute;
    right: 16px;
    top: 56px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px;
    width: min(240px, calc(100vw - 32px));
    box-shadow: var(--shadow);
  }
  .nav__menu.is-open{ display:flex; }
  .nav{ position: relative; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@media print{
  .header, .skip-link, .hero__cta, .btn, .nav, .toast{ display:none !important; }
  body{ background: #fff; color: #111; }
  .card, .stat, .accordion__item{ box-shadow:none; }
  .section{ padding: 18px 0; }
  a{ text-decoration:none; }
}