/* ─── tokens ─────────────────────────────────────────────── */
:root {
  --bg: #0a0b0d;
  --bg-2: #101114;
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.16);
  --fg: #e9e7e3;
  --fg-dim: #a5a29d;
  --fg-mute: #6f6c68;
  --accent: #ff6a3d;
  --accent-soft: rgba(255, 106, 61, 0.14);

  --sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Mono", ui-monospace, monospace;

  --max: 1180px;
  --pad: clamp(20px, 5vw, 56px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

/* 顶部红晕，只出现一次，克制 */
body::before {
  content: "";
  position: fixed;
  inset: -30vh -10vw auto auto;
  width: 70vw;
  height: 70vh;
  background: radial-gradient(60% 60% at 70% 30%, rgba(255, 106, 61, 0.13), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

main { position: relative; z-index: 1; }

/* ─── nav ────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px var(--pad);
  background: rgba(10, 11, 13, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

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

.nav__mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--accent);
  border-radius: 7px;
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
}

.nav__name {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
}

.nav__name em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  color: var(--fg-mute);
  letter-spacing: 0.12em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  font-size: 13px;
  color: var(--fg-dim);
}

.nav__links a:hover { color: var(--fg); }

.nav__gh {
  padding: 5px 11px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--fg) !important;
}

.nav__gh:hover { border-color: var(--accent); color: var(--accent) !important; }

/* ─── hero ───────────────────────────────────────────────── */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(64px, 11vw, 132px) var(--pad) clamp(48px, 7vw, 84px);
}

.hero__eyebrow {
  margin: 0 0 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.hero__title {
  margin: 0;
  font-size: clamp(34px, 6.4vw, 74px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero__accent {
  background: linear-gradient(94deg, #ff7a45 0%, #ff4d6d 58%, #f0a13a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* 换行时每个片段各自铺一层渐变，否则第二行会掉进暗部 */
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.hero__intro {
  max-width: 44em;
  margin: 28px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--fg-dim);
}

.stats {
  display: flex;
  gap: clamp(28px, 5vw, 64px);
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0;
}

.stat { display: flex; flex-direction: column-reverse; gap: 2px; }

.stat dd {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 600;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--fg-mute);
}

.scroll-hint {
  display: inline-block;
  margin-top: clamp(36px, 5vw, 56px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fg-mute);
}

.scroll-hint:hover { color: var(--accent); }

/* ─── section head ───────────────────────────────────────── */
.works { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad) clamp(60px, 8vw, 100px); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
}

.section-head--tight { margin-top: clamp(48px, 7vw, 84px); }

.section-head h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-count {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fg-mute);
}

/* ─── filters ────────────────────────────────────────────── */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--fg-dim);
  font-family: var(--sans);
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background 0.18s;
}

.chip:hover { color: var(--fg); border-color: var(--line-2); }

.chip[aria-pressed="true"] {
  background: var(--fg);
  border-color: var(--fg);
  color: #0a0b0d;
  font-weight: 600;
}

.chip__en {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-mute, #6b6f76);
  opacity: 0.85;
}

.chip__n {
  font-family: var(--mono);
  font-size: 10px;
  opacity: 0.6;
}

/* ─── grid ───────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 18px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}

a.card:hover,
.card:hover { border-color: var(--line-2); }

a.card:hover { transform: translateY(-2px); border-color: rgba(255, 106, 61, 0.5); }

/* 卡片统一尺寸：这是索引，不是宣传页 */

/* cover: 有图就用图，没图用排版块 */
.card__cover {
  position: relative;
  aspect-ratio: 16 / 9;
  isolation: isolate;
  background: #0e0f12;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: saturate(0.92) contrast(1.02);
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.3, 1);
}

a.card:hover .card__cover img { transform: scale(1.03); }

.card__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 11, 13, 0.05) 30%, rgba(10, 11, 13, 0.85) 100%);
  pointer-events: none;
}

.card__cover--plate::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(120% 100% at 15% 20%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 100% at 15% 20%, #000 20%, transparent 78%);
}

.card__plate {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: flex-end start;
  padding: 16px 18px;
  font-family: var(--mono);
  z-index: 1;
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 700;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.1);
}

/* 每个分类一个极淡的色相，让网格不是一片灰 */
.card[data-cat="agents"] .card__cover { background-image: radial-gradient(120% 120% at 12% 10%, rgba(255, 106, 61, 0.16), transparent 62%); }
.card[data-cat="systems"] .card__cover { background-image: radial-gradient(120% 120% at 12% 10%, rgba(94, 214, 168, 0.14), transparent 62%); }
.card[data-cat="research"] .card__cover { background-image: radial-gradient(120% 120% at 12% 10%, rgba(150, 132, 255, 0.16), transparent 62%); }
.card[data-cat="film"] .card__cover { background-image: radial-gradient(120% 120% at 12% 10%, rgba(255, 176, 80, 0.14), transparent 62%); }
.card[data-cat="automation"] .card__cover { background-image: radial-gradient(120% 120% at 12% 10%, rgba(96, 168, 255, 0.15), transparent 62%); }

.card__cat {
  position: absolute;
  left: 14px;
  top: 12px;
  z-index: 2;
  padding: 3px 9px;
  border: 1px solid var(--line-2);
  border-radius: 5px;
  background: rgba(10, 11, 13, 0.55);
  backdrop-filter: blur(6px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}

.card__badge {
  position: absolute;
  right: 14px;
  bottom: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--fg-mute);
}

.card__badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

.card__badge[data-tone="live"] { color: #5ed6a8; }
.card__badge[data-tone="done"] { color: #ffb050; }
.card__badge[data-tone="idle"] { color: var(--fg-mute); }

.card__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 18px 20px;
  flex: 1;
}

.card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.card__sub {
  margin: -6px 0 0;
  font-size: 12px;
  letter-spacing: 0.01em;
  color: var(--fg-mute);
}

.card__sum {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--fg-dim);
}


.chips { display: flex; flex-wrap: wrap; gap: 5px; margin: auto 0 0; padding: 6px 0 0; list-style: none; }

.chips li {
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--fg-mute);
  white-space: nowrap;
}

.card--locked { opacity: 0.78; }
.card--locked .card__title::after {
  content: "私有";
  margin-left: 8px;
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--fg-mute);
  vertical-align: 2px;
}

/* ─── closed list ────────────────────────────────────────── */
.closed__list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }

.closed__item {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.95fr);
  gap: clamp(12px, 3vw, 40px);
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 720px) { .closed__item { grid-template-columns: 1fr; gap: 6px; } }

.closed__title { font-size: 14.5px; font-weight: 600; }

.closed__note { margin: 0; font-size: 13px; color: var(--fg-dim); }

/* ─── about ──────────────────────────────────────────────── */
.about {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad) clamp(60px, 9vw, 110px);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.about__grid p { margin: 0; font-size: 13.5px; line-height: 1.75; color: var(--fg-dim); }

.about__grid strong { color: var(--fg); font-weight: 600; }

.about__grid code,
.foot code {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
}

.about__grid a { color: var(--accent); border-bottom: 1px solid rgba(255, 106, 61, 0.35); }

/* ─── footer ─────────────────────────────────────────────── */
.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px var(--pad) 46px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--fg-mute);
}

.foot p { margin: 0; }

.foot__links { display: flex; gap: 18px; }

.foot__links a:hover { color: var(--accent); }

/* ─── motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: none; }
  }
  .reveal {
    animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.3, 1) both;
    animation-delay: calc(var(--i, 0) * 45ms);
  }
}

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

/* 截图与 prefers-reduced-motion 的静帧模式 */
html.still .reveal { animation: none !important; opacity: 1 !important; transform: none !important; }