:root {
  --bg: #0e0f12;
  --bg-2: #15171c;
  --card: #1b1e24;
  --line: #2a2e36;
  --text: #e8e9ec;
  --muted: #9aa0ab;
  --accent: #ffb84d;
  --accent-2: #5ec8ff;
  --max: 1120px;
  --radius: 14px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font); font-size: 16px; line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img, video { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: .01em; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,15,18,.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; color: var(--text); letter-spacing: .04em; }
.brand span { color: var(--accent); }
.nav ul { list-style: none; display: flex; gap: 22px; margin: 0; padding: 0; }
.nav li a { color: var(--muted); font-size: .95rem; }
.nav li a:hover, .nav li a.active { color: var(--text); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 6px 10px; font-size: 1rem; }
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav ul { display: none; position: absolute; left: 0; right: 0; top: 64px; flex-direction: column; gap: 0; background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 10px 20px; }
  .nav ul.open { display: flex; }
  .nav li a { display: block; padding: 10px 0; }
}

/* hero */
.hero { padding: 96px 0 72px; border-bottom: 1px solid var(--line);
  background: radial-gradient(1200px 500px at 70% -10%, rgba(255,184,77,.10), transparent 60%),
              radial-gradient(800px 400px at 10% 110%, rgba(94,200,255,.08), transparent 60%); }
.hero .grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.hero .eyebrow { color: var(--accent); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; font-size: .8rem; margin-bottom: 14px; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 560px; }
.hero .avatar { width: 220px; height: 220px; border-radius: 50%; object-fit: cover; border: 3px solid var(--line); justify-self: center; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn { display: inline-block; padding: 11px 20px; border-radius: 10px; font-weight: 600; border: 1px solid var(--line); color: var(--text); background: var(--card); }
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn.primary { background: var(--accent); color: #1a1200; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
@media (max-width: 800px) { .hero { padding: 64px 0 48px; } .hero .grid { grid-template-columns: 1fr; } .hero .avatar { width: 150px; height: 150px; order: -1; justify-self: start; } }

/* sections */
section.block { padding: 72px 0; border-bottom: 1px solid var(--line); }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.sec-head .muted { font-size: .95rem; }

/* project cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 22px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: transform .2s, border-color .2s; color: var(--text); }
.card:hover { transform: translateY(-4px); border-color: #3a3f4a; text-decoration: none; }
.card .thumb { aspect-ratio: 16/9; background: #0a0b0d; overflow: hidden; position: relative; }
.card .thumb img, .card .thumb video { width: 100%; height: 100%; object-fit: cover; position: relative; z-index: 1; }
.card .thumb .ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: .9rem; background: repeating-linear-gradient(45deg, #121418 0 12px, #16181d 12px 24px); }
.card .body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card .meta { color: var(--muted); font-size: .85rem; }
.card h3 { margin: 0; }
.card p { color: var(--muted); font-size: .95rem; margin: 4px 0 10px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.tag { font-size: .75rem; padding: 3px 9px; border-radius: 999px; background: #22262e; color: #c9ced8; border: 1px solid var(--line); }
.card.featured { grid-column: 1 / -1; flex-direction: row; }
.card.featured .thumb { flex: 1.3; aspect-ratio: auto; min-height: 300px; }
.card.featured .body { flex: 1; padding: 28px; justify-content: center; }
@media (max-width: 800px) { .card.featured { flex-direction: column; } .card.featured .thumb { aspect-ratio: 16/9; min-height: 0; } }

/* timeline */
.timeline { display: grid; gap: 18px; }
.tl { display: grid; grid-template-columns: 160px 1fr; gap: 20px; padding: 20px 0; border-top: 1px solid var(--line); }
.tl:last-child { border-bottom: 1px solid var(--line); }
.tl .when { color: var(--muted); font-size: .9rem; padding-top: 4px; }
.tl h3 { margin-bottom: 2px; }
.tl .role { color: var(--accent); font-size: .9rem; margin-bottom: 8px; }
.tl ul { margin: 0; padding-left: 1.2em; color: #cfd3da; }
.tl li { margin-bottom: 4px; }
@media (max-width: 640px) { .tl { grid-template-columns: 1fr; gap: 6px; } }

/* skills */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.skill { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.skill h3 { color: var(--accent); font-size: 1rem; margin-bottom: 8px; }
.skill p { color: #cfd3da; margin: 0; font-size: .95rem; }

/* contact */
.contact { text-align: center; padding: 80px 0; }
.contact .email { font-size: clamp(1.2rem, 3vw, 1.8rem); font-weight: 600; }

footer { padding: 32px 0; color: var(--muted); font-size: .85rem; text-align: center; }

/* project page */
.proj-hero { padding: 64px 0 36px; border-bottom: 1px solid var(--line); }
.proj-hero .back { color: var(--muted); font-size: .9rem; display: inline-block; margin-bottom: 20px; }
.proj-hero .sub { color: var(--muted); font-size: 1.1rem; max-width: 720px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin-top: 28px; }
.fact { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.fact .k { color: var(--muted); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; }
.fact .v { font-weight: 600; margin-top: 2px; font-size: .95rem; }
.proj-body { padding: 48px 0 24px; }
.proj-body .cols { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; }
.proj-body .cols aside { position: sticky; top: 90px; align-self: start; }
.proj-body h2 { font-size: 1.4rem; margin-top: 40px; padding-top: 8px; }
.proj-body h2:first-child { margin-top: 0; }
.proj-body ul { padding-left: 1.2em; color: #cfd3da; }
.proj-body li { margin-bottom: 6px; }
.proj-body .note { background: var(--card); border-left: 3px solid var(--accent); padding: 12px 16px; border-radius: 0 10px 10px 0; color: #cfd3da; }
.media { margin: 28px 0; }
.media figure { margin: 0; }
.media figcaption { color: var(--muted); font-size: .85rem; margin-top: 8px; }
.media video, .media img { border-radius: 10px; border: 1px solid var(--line); background: #000; width: 100%; }
.media-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.media-grid figure { margin: 0; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.gallery img { aspect-ratio: 16/9; object-fit: cover; }
.aside-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 18px; }
.aside-box h3 { font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.aside-box ul { padding-left: 1.1em; margin: 0; color: #cfd3da; font-size: .95rem; }
.proj-nav { display: flex; justify-content: space-between; gap: 16px; padding: 32px 0 56px; border-top: 1px solid var(--line); margin-top: 40px; }
.proj-nav a { color: var(--text); }
.proj-nav small { display: block; color: var(--muted); }
@media (max-width: 860px) { .proj-body .cols { grid-template-columns: 1fr; } .proj-body .cols aside { position: static; } .media-grid { grid-template-columns: 1fr; } }

/* phone (vertical) video row */
.phones { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin: 24px 0; }
.phones figure { margin: 0; }
.phones video { aspect-ratio: 9/19; object-fit: contain; border-radius: 18px; border: 1px solid var(--line); background: #000; width: 100%; }
.phones figcaption { color: var(--muted); font-size: .85rem; margin-top: 8px; }
/* item combo */
.combo { display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 24px 0; }
.combo img { width: 120px; height: 120px; object-fit: contain; }
.combo .op { font-size: 2rem; color: var(--accent); }
.combo figcaption { width: 100%; text-align: center; color: var(--muted); font-size: .85rem; }
/* role split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 20px 0; }
.split > div { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.split h4 { margin: 0 0 8px; font-size: .95rem; color: var(--accent); }
.split.alt h4:last-of-type { color: var(--muted); }
.split ul { margin: 0; padding-left: 1.1em; font-size: .95rem; }
@media (max-width: 700px) { .split { grid-template-columns: 1fr; } }
.status { display: inline-block; font-size: .75rem; padding: 3px 10px; border-radius: 999px; background: rgba(255,184,77,.15); color: var(--accent); border: 1px solid rgba(255,184,77,.4); margin-left: 10px; vertical-align: middle; }
table.mat { border-collapse: collapse; width: 100%; margin: 20px 0; font-size: .92rem; }
table.mat th, table.mat td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
table.mat th { background: var(--card); color: var(--muted); font-weight: 600; }
.media-grid img { aspect-ratio: 16/10; object-fit: contain; background: #0a0b0d; }

.media figure.aidol-key img { max-height: 520px; width: auto; margin: 0 auto; }

/* blog */
.post-list { display: grid; gap: 14px; }
.post-card { display: grid; grid-template-columns: 120px 1fr; gap: 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; color: var(--text); transition: transform .2s, border-color .2s; }
.post-card:hover { transform: translateY(-3px); border-color: #3a3f4a; text-decoration: none; }
.post-card .post-date { color: var(--muted); font-size: .9rem; padding-top: 4px; }
.post-card h3 { margin: 0 0 6px; font-size: 1.15rem; }
.post-card p { color: var(--muted); margin: 0 0 10px; font-size: .95rem; }
@media (max-width: 640px) { .post-card { grid-template-columns: 1fr; gap: 6px; } }
article.post { padding: 56px 0 24px; }
article.post .wrap { max-width: 760px; }
article.post .back { color: var(--muted); font-size: .9rem; display: inline-block; margin-bottom: 20px; }
article.post h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); }
.post-meta { color: var(--muted); font-size: .9rem; margin: 10px 0 36px; padding-bottom: 20px; border-bottom: 1px solid var(--line); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.post-meta .tags { display: inline-flex; gap: 6px; margin: 0; }
.post-body { font-size: 1.05rem; line-height: 1.85; }
.post-body h2 { font-size: 1.35rem; margin: 2.2em 0 .6em; }
.post-body h3 { font-size: 1.1rem; margin: 1.8em 0 .5em; color: var(--accent); }
.post-body p { margin: 0 0 1.1em; }
.post-body ul, .post-body ol { padding-left: 1.3em; margin: 0 0 1.1em; }
.post-body li { margin-bottom: .3em; }
.post-body blockquote { margin: 1.4em 0; padding: 12px 18px; border-left: 3px solid var(--accent); background: var(--card); border-radius: 0 10px 10px 0; color: #e0e3e8; font-weight: 500; }
.post-body blockquote p { margin: 0; }
.post-body em { color: #d8dbe0; }

.post-top { display: flex; justify-content: space-between; gap: 12px; }
.post-top .lang { color: var(--accent); }

/* Restored blog images retain their source order and aspect ratio. */
.post-card-illustrated { grid-template-columns: 220px minmax(0, 1fr); padding: 0; overflow: hidden; }
.post-card-illustrated .post-card-cover { width: 100%; height: 100%; min-height: 180px; object-fit: cover; }
.post-card-copy { min-width: 0; padding: 22px 24px; }
.post-card-copy .post-date { margin-bottom: 7px; }
.post-figure { margin: 1.8em 0; }
.post-figure a { display: block; }
.post-figure img { width: 100%; height: auto; border-radius: 10px; background: var(--card); }
.post-image-label { font-size: .9rem; color: var(--muted); margin-bottom: -.5em; }
.post-body { overflow-wrap: anywhere; }
.post-body h2, .post-body h3 { scroll-margin-top: 90px; }
.post-toc { margin: -8px 0 28px; padding: 15px 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
.post-toc summary { cursor: pointer; font-weight: 500; }
.post-toc ul { list-style: none; margin: 14px 0 0; padding: 0; font-size: .9rem; }
.post-toc li { margin: 6px 0; }
.post-toc .toc-level-3 { padding-left: 1.2em; }
.post-toc a { color: var(--muted); }
.post-toc a:hover { color: var(--accent); }
@media (max-width: 640px) {
  .post-card-illustrated { grid-template-columns: 1fr; gap: 0; }
  .post-card-illustrated .post-card-cover { height: auto; min-height: 0; aspect-ratio: 16 / 9; }
  .post-card-copy { padding: 18px; }
  .post-top { flex-wrap: wrap; }
  .post-figure { margin: 1.4em 0; }
}