:root {
  --bg: #0b0d12;
  --bg-2: #11141b;
  --text: #e6e8ee;
  --muted: #9aa3b2;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --card: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

#bg {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(800px 500px at 80% -10%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(34, 211, 238, 0.18), transparent 60%),
    var(--bg);
}

.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 32px;
  backdrop-filter: blur(12px);
  background: rgba(11, 13, 18, 0.6);
  border-bottom: 1px solid var(--border);
}
.logo { font-weight: 800; letter-spacing: 1px; font-size: 20px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav nav a {
  color: var(--muted); text-decoration: none; margin-left: 24px;
  font-size: 14px; transition: color .2s;
}
.nav nav a:hover { color: var(--text); }

main { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

.hero {
  display: grid; grid-template-columns: 1fr auto; gap: 40px;
  align-items: center; min-height: 80vh; padding: 60px 0;
}
.kicker { color: var(--muted); margin-bottom: 8px; }
.hero h1 {
  font-size: clamp(40px, 7vw, 72px); font-weight: 800; line-height: 1.05;
  letter-spacing: -0.02em;
}
.hero h1 .dot {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.typed {
  font-size: clamp(18px, 2.4vw, 26px); font-weight: 500;
  margin: 14px 0 18px; color: var(--accent-2); min-height: 1.4em;
}
.caret { animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

.lead { color: var(--muted); max-width: 560px; }

.cta { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  text-decoration: none; font-weight: 600; font-size: 14px;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
}
.btn.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #0b0d12;
  box-shadow: 0 10px 30px -10px rgba(124, 92, 255, 0.6);
}
.btn.primary:hover { transform: translateY(-2px); }
.btn.ghost {
  color: var(--text); border: 1px solid var(--border);
  background: var(--card);
}
.btn.ghost:hover { background: rgba(255,255,255,.06); }

.avatar {
  position: relative; width: 240px; height: 240px;
  display: grid; place-items: center;
}
.avatar .emoji {
  font-size: 110px;
  filter: drop-shadow(0 10px 30px rgba(124, 92, 255, .35));
}
.avatar .ring {
  position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent));
  filter: blur(2px); animation: spin 8s linear infinite;
  mask: radial-gradient(circle, transparent 60%, #000 62%);
  -webkit-mask: radial-gradient(circle, transparent 60%, #000 62%);
}
@keyframes spin { to { transform: rotate(360deg); } }

.section { padding: 80px 0; }
.section-title {
  font-size: 28px; font-weight: 700; margin-bottom: 28px;
  position: relative; padding-left: 14px;
}
.section-title::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}

.skills {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.skill-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 22px; transition: transform .2s, border-color .2s;
}
.skill-card:hover { transform: translateY(-4px); border-color: rgba(124,92,255,.4); }
.skill-card .ico { font-size: 28px; }
.skill-card h4 { margin: 10px 0 6px; }
.skill-card p { color: var(--muted); font-size: 14px; }

.projects {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.project {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden; transition: transform .2s;
}
.project:hover { transform: translateY(-4px); }
.thumb {
  aspect-ratio: 16/9;
  display: grid; place-items: center;
  font-size: 64px; font-weight: 800; color: rgba(255,255,255,.85);
  background: linear-gradient(135deg, var(--c1, #7c5cff), var(--c2, #22d3ee));
}
.project h4 { padding: 16px 18px 4px; }
.project p { padding: 0 18px; color: var(--muted); font-size: 14px; }
.tags { padding: 12px 18px 18px; display: flex; gap: 6px; flex-wrap: wrap; }
.tags span {
  font-size: 12px; padding: 4px 10px; border-radius: 999px;
  background: rgba(124,92,255,.12); color: #c7bdff;
  border: 1px solid rgba(124,92,255,.25);
}

.contact .links {
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px;
}
.contact .links a {
  padding: 10px 16px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); text-decoration: none; font-size: 14px;
  transition: all .2s;
}
.contact .links a:hover {
  border-color: var(--accent); transform: translateY(-2px);
}

footer {
  text-align: center; padding: 40px 20px;
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--border); margin-top: 40px;
}

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; text-align: left; }
  .avatar { width: 180px; height: 180px; }
  .nav { padding: 14px 20px; }
  .nav nav a { margin-left: 14px; }
}

/* reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s, transform .8s; }
.reveal.show { opacity: 1; transform: none; }