:root{
  --bg: #0b1020;
  --panel: rgba(255,255,255,.06);
  --panel-2: rgba(255,255,255,.08);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);
  --border: rgba(255,255,255,.12);
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --accent: #86a8ff;
  --accent-2: #9effe5;
  --danger: #ff6b6b;
  --radius: 18px;
  --radius-sm: 12px;
  --container: 1100px;
  --ring: 0 0 0 4px color-mix(in srgb, var(--accent) 35%, transparent);
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

:root[data-theme="light"]{
  --bg: #f7f8fc;
  --panel: rgba(10,20,40,.06);
  --panel-2: rgba(10,20,40,.08);
  --text: rgba(10,20,40,.92);
  --muted: rgba(10,20,40,.68);
  --border: rgba(10,20,40,.14);
  --shadow: 0 10px 30px rgba(15,25,40,.12);
  --accent: #315efb;
  --accent-2: #0fb7a2;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background:
    radial-gradient(1200px 800px at 20% -10%, rgba(134,168,255,.25), transparent 60%),
    radial-gradient(1000px 700px at 80% 0%, rgba(158,255,229,.18), transparent 55%),
    radial-gradient(900px 700px at 50% 100%, rgba(134,168,255,.12), transparent 60%),
    var(--bg);
  min-height: 100vh;
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
button{ font-family: inherit; }
::selection{ background: color-mix(in srgb, var(--accent) 30%, transparent); }

:focus-visible{
  outline: none;
  box-shadow: var(--ring);
  border-radius: 10px;
}

.container{
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link{
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transform: translateY(-200%);
  transition: transform .2s ease;
  z-index: 1000;
}
.skip-link:focus{ transform: translateY(0); outline: none; }

.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
  padding: 14px 0;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: .2px;
}

.brand-mark{
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 70%, transparent), color-mix(in srgb, var(--accent-2) 60%, transparent));
  color: rgba(255,255,255,.96);
}

.brand-text{ font-size: 15px; }

.nav{
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
}
.nav a{
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
}
.nav a:hover{ background: var(--panel-2); color: var(--text); }

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

.icon-button{
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
}
.icon-button:hover{ background: var(--panel-2); }
.icon{ font-size: 18px; }
.menu-button{ display: none; }

.nav-drawer{
  position: fixed;
  inset: 0;
  z-index: 200;
}
.nav-backdrop{
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(0,0,0,.42);
  backdrop-filter: blur(4px);
  cursor: pointer;
}
.nav-sheet{
  position: absolute;
  top: 10px;
  right: 10px;
  width: min(420px, calc(100% - 20px));
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  box-shadow: var(--shadow);
  padding: 14px;
}
.nav-sheet-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.nav-sheet-title{ font-weight: 800; letter-spacing: -0.2px; }
.nav-sheet-links{
  display: grid;
  gap: 10px;
  padding: 12px 0;
}
.nav-sheet-links a{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
}
.nav-sheet-links a:hover{ background: var(--panel-2); }
.nav-sheet-actions{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.hero{
  padding: 54px 0 18px;
}

.hero-inner{
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 26px;
  align-items: start;
}

.eyebrow{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-title{
  margin: 6px 0 8px;
  font-size: clamp(40px, 5vw, 56px);
  letter-spacing: -0.6px;
  line-height: 1.05;
}

.hero-subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 16px;
  max-width: 60ch;
}

.cta-row{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.button{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.button:hover{ background: var(--panel-2); transform: translateY(-1px); }
.button.primary{
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 30%, var(--panel)), color-mix(in srgb, var(--accent-2) 24%, var(--panel)));
}
.button.ghost{ background: transparent; }

.meta-row{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.pill{
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}

.hero-card .card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel), color-mix(in srgb, var(--panel) 75%, transparent));
  box-shadow: var(--shadow);
  padding: 16px;
}
.card-header{
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.avatar{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 55%, transparent), color-mix(in srgb, var(--accent-2) 45%, transparent));
  color: rgba(255,255,255,.96);
  font-weight: 800;
  letter-spacing: .2px;
}
.card-title{ font-weight: 800; }
.card-subtitle{ color: var(--muted); font-size: 13px; }

.kv{
  margin: 0;
  display: grid;
  gap: 10px;
}
.kv > div{
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
}
.kv dt{ color: var(--muted); font-size: 13px; }
.kv dd{ margin: 0; font-weight: 600; }

.card-footer{
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.section{
  padding: 34px 0;
}
.section-head{
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}
.section-head h2{
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.4px;
}
.section-head p{
  margin: 0;
  color: var(--muted);
}

.grid-2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.grid-3{
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}

.panel{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 16px;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.panel h3{ margin: 0 0 10px; font-size: 16px; }
.panel p{ margin: 0 0 10px; color: var(--muted); }
.panel p:last-child{ margin-bottom: 0; }
.panel:hover{
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  border-color: color-mix(in srgb, var(--accent) 18%, var(--border));
  transform: translateY(-2px);
}

.list{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li{ margin: 8px 0; }

.cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.project-card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel), color-mix(in srgb, var(--panel) 75%, transparent));
  padding: 16px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.project-card h3{ margin: 0; font-size: 16px; }
.project-card p{ margin: 0; color: var(--muted); }
.project-card:hover{
  border-color: color-mix(in srgb, var(--accent) 20%, var(--border));
  transform: translateY(-3px);
}

.tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}
.tag{
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}

.card-actions{
  margin-top: auto;
  display: flex;
  gap: 14px;
  align-items: center;
}

.text-link{
  color: color-mix(in srgb, var(--accent) 75%, var(--text));
  font-weight: 650;
  font-size: 14px;
}
.text-link:hover{ text-decoration: underline; }

.link-button{
  padding: 0;
  border: 0;
  background: transparent;
  color: color-mix(in srgb, var(--accent) 75%, var(--text));
  font-weight: 700;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 13px;
}
.link-button:hover{ text-decoration: underline; }

.muted{ color: var(--muted); font-size: 13px; }

.site-footer{
  padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
}
.footer-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.footer-links{
  display: flex;
  gap: 12px;
  align-items: center;
}

.toast{
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  box-shadow: var(--shadow);
  color: var(--text);
  backdrop-filter: blur(14px);
  max-width: min(520px, calc(100% - 24px));
}

@media (max-width: 920px){
  .hero-inner{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .nav{ display: none; }
  .menu-button{ display: inline-grid; }
  .hero{ padding-top: 34px; }
  .nav-sheet-actions{ grid-template-columns: 1fr; }
}

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