:root {
  --bg: #14161c;
  --bg-card: #1b1f28;
  --bg-hover: #222734;
  --border: #3a3f4c;
  --text: #e8e8e8;
  --text-dim: #9aa;
  --accent: #ffb03a;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}
.container { width: min(1080px, 96vw); margin: 0 auto; }

/* header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(20, 22, 28, 0.9);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(6px);
}
.header-inner { display: flex; align-items: center; gap: 24px; padding: 14px 4px; }
.logo {
  font-size: 20px; font-weight: 700; letter-spacing: 1px; text-decoration: none; color: var(--text);
}
.logo:hover { color: var(--accent); }
.nav { margin-left: auto; display: flex; gap: 18px; }
.nav a { color: var(--text-dim); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--text); }

/* hero */
.hero { padding: 56px 4px 28px; }
.hero h1 { font-size: 34px; margin: 0 0 8px; font-weight: 700; letter-spacing: 2px; }
.hero p { color: var(--text-dim); margin: 0; font-size: 16px; }

/* grid + cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 20px 4px 48px;
}
.card {
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.card .thumb {
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1b1f28, #232a3a);
  color: var(--accent);
  font-size: 44px; font-weight: 700; letter-spacing: 2px;
  user-select: none;
}
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card .title { font-size: 17px; font-weight: 600; margin: 0; }
.card .subtitle { font-size: 13px; color: var(--text-dim); margin: 0; }
.card .summary { font-size: 13px; color: var(--text-dim); line-height: 1.6; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }
.tag {
  font-size: 12px; color: var(--accent);
  border: 1px solid rgba(255, 176, 58, 0.35);
  border-radius: 999px; padding: 2px 10px;
}

/* project detail */
.back { padding: 20px 4px 0; }
.back a { color: var(--text-dim); text-decoration: none; font-size: 14px; }
.back a:hover { color: var(--accent); }
.project-detail { padding: 12px 4px 48px; max-width: 860px; }
.project-detail .hero2 { margin-bottom: 20px; }
.project-detail h1 { font-size: 28px; margin: 0 0 6px; }
.project-detail .subtitle { color: var(--text-dim); margin: 0 0 12px; font-size: 15px; }
.project-detail .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.project-detail .shot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, #1b1f28, #232a3a);
  margin-bottom: 20px;
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
}
.project-detail .shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.project-detail .shot .placeholder { color: var(--accent); font-size: 44px; font-weight: 700; }
.project-detail .desc p { color: var(--text-dim); line-height: 1.8; font-size: 15px; margin: 0 0 14px; }
.project-detail .meta { color: var(--text-dim); font-size: 13px; margin: 18px 0 0; }
.project-detail .meta a { color: var(--accent); text-decoration: none; }
.project-detail .meta a:hover { text-decoration: underline; }
.actions { display: flex; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--bg-card);
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #14161c; font-weight: 600; }
.btn.primary:hover { filter: brightness(1.08); }
details.play { margin-top: 8px; }
details.play summary { cursor: pointer; color: var(--text-dim); font-size: 14px; margin-bottom: 10px; user-select: none; }
details.play summary:hover { color: var(--accent); }
details.play iframe {
  width: 100%; height: 560px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0e1014;
}

/* footer */
.site-footer { margin-top: auto; border-top: 1px solid var(--border); }
.site-footer .container { display: flex; justify-content: space-between; padding: 16px 4px; color: var(--text-dim); font-size: 13px; }
.site-footer a { color: var(--text-dim); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

.loading { color: var(--text-dim); font-size: 14px; }

@media (max-width: 560px) {
  .hero { padding: 36px 4px 20px; }
  .hero h1 { font-size: 26px; }
  .project-detail h1 { font-size: 22px; }
  details.play iframe { height: 420px; }
}