:root {
  --bg: #111214;
  --bg-soft: #16171a;
  --panel: #1b1c20;
  --card: #1e1f24;
  --line: #33353c;
  --line-soft: #2a2c32;
  --text: #e8e8ea;
  --muted: #9a9ca5;
  --accent: #ffb547;
  --accent2: #ff8a3d;
  --glow: rgba(255, 181, 71, 0.35);
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Helvetica Neue", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(17, 18, 20, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: 1000px; margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1a1205; font-size: 14px; font-weight: 800; letter-spacing: .5px;
}
.brand-name { display: flex; flex-direction: column; line-height: 1.15; font-size: 15px; }
.brand-en { font-size: 11px; color: var(--muted); font-weight: 500; }
.links { display: flex; gap: 4px; margin-left: auto; }
.links a {
  padding: 6px 12px; border-radius: 8px; color: var(--muted);
  font-size: 14px; font-weight: 500; transition: .15s;
}
.links a:hover { color: var(--text); background: var(--panel); }
.lang-toggle {
  border: 1px solid var(--line); background: var(--panel); color: var(--muted);
  border-radius: 9px; padding: 5px 10px; font-size: 13px; cursor: pointer;
  display: flex; align-items: center; gap: 6px; transition: .15s;
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-opt { transition: .15s; }
.lang-opt.active { color: var(--accent); font-weight: 700; }
.lang-sep { opacity: .4; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line-soft); }
.hero-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 400px at 20% 0%, var(--glow), transparent 60%),
    radial-gradient(500px 360px at 85% 20%, rgba(255, 138, 61, 0.22), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(255, 181, 71, 0.08), transparent 60%);
}
.hero-inner {
  position: relative; max-width: 1000px; margin: 0 auto;
  padding: 110px 24px 100px; text-align: center;
}
.hero-greet { color: var(--muted); font-size: 15px; margin: 0 0 14px; letter-spacing: 1px; }
.hero-name {
  margin: 0; font-size: clamp(40px, 7vw, 68px); line-height: 1.08; font-weight: 800;
  letter-spacing: 1px;
}
.hero-name-en {
  display: block; font-size: clamp(20px, 3.4vw, 32px); font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-top: 8px;
}
.hero-title {
  margin: 22px 0 10px; font-size: 20px; font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-tagline { margin: 0 auto; max-width: 560px; color: var(--muted); font-size: 16px; }
.hero-loc { margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.hero-actions { margin-top: 34px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  transition: .18s; border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1a1205; box-shadow: 0 6px 24px var(--glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--glow); }
.btn-ghost { border-color: var(--line); background: var(--panel); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Sections ---------- */
.section { padding: 78px 24px; }
.section:nth-child(even) { background: var(--bg-soft); }
.section-inner { max-width: 1000px; margin: 0 auto; }
.section-title {
  margin: 0; font-size: 30px; font-weight: 800;
  display: inline-block;
}
.section-sub {
  margin: 2px 0 30px; color: var(--muted); font-size: 14px; letter-spacing: 1px;
}

/* ---------- Cards ---------- */
.card {
  background: var(--card); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 28px; transition: .2s;
}
.about-card p { margin: 0 0 14px; color: #cfd0d4; font-size: 16.5px; }
.about-card p:last-child { margin-bottom: 0; }

/* ---------- Tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  padding: 8px 16px; border-radius: 999px; font-size: 14px; font-weight: 500;
  background: var(--card); border: 1px solid var(--line); color: #cfd0d4;
  transition: .18s;
}
.tag:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; }
.project { display: flex; flex-direction: column; cursor: pointer; }
.project:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.4); }
.project-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.project-folder { font-size: 22px; }
.project-star { color: var(--accent); }
.project-name { margin: 0; font-size: 19px; font-weight: 700; }
.project-sub { margin: 2px 0 10px; color: var(--accent); font-size: 13px; font-weight: 600; }
.project-desc { margin: 0 0 18px; color: var(--muted); font-size: 14.5px; flex: 1; }
.project-link { color: var(--muted); font-size: 13.5px; font-weight: 600; transition: .15s; }
.project:hover .project-link { color: var(--accent); }

/* ---------- Contact ---------- */
.contact { display: grid; gap: 8px; }
.contact-item {
  display: flex; align-items: center; gap: 14px; padding: 12px 10px;
  border-radius: 10px; transition: .15s;
}
a.contact-item:hover { background: var(--panel); }
.contact-item svg, .contact-icon { color: var(--accent); flex: none; }
.contact-item b { display: block; font-size: 15px; }
.contact-item small { color: var(--muted); font-size: 13.5px; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line-soft); padding: 30px 24px;
  text-align: center; color: var(--muted); font-size: 13.5px;
}
.footer p { margin: 0; }
.footer-note { margin-top: 4px !important; opacity: .7; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .nav-inner { padding: 10px 16px; gap: 12px; }
  .links { display: none; }
  .hero-inner { padding: 76px 20px 70px; }
  .section { padding: 56px 20px; }
  .card { padding: 22px; }
}