@font-face {
  font-family: "Inter";
  src: url("./assets/inter-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("./assets/inter-500.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("./assets/inter-600.ttf") format("truetype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("./assets/inter-700.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("./assets/inter-800.ttf") format("truetype");
  font-style: normal;
  font-weight: 800;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./assets/ibm-plex-mono-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./assets/ibm-plex-mono-600.ttf") format("truetype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

:root {
  --paper: #f1f4f7;
  --paper-cool: #e6ecf2;
  --surface: #ffffff;
  --ink: #0b1322;
  --ink-soft: #23324a;
  --muted: #5e6c80;
  --line: rgba(13, 26, 45, 0.11);
  --line-strong: rgba(13, 26, 45, 0.18);
  --night: #0a1424;
  --night-soft: #101d31;
  --night-line: #27374e;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(11, 19, 34, 0.05), 0 2px 6px rgba(11, 19, 34, 0.04);
  --shadow-md: 0 1px 2px rgba(11, 19, 34, 0.04), 0 6px 16px -4px rgba(11, 19, 34, 0.10),
    0 16px 34px -14px rgba(11, 19, 34, 0.13);
  --shadow-lg: 0 2px 4px rgba(11, 19, 34, 0.05), 0 12px 28px -8px rgba(11, 19, 34, 0.13),
    0 34px 64px -22px rgba(11, 19, 34, 0.22);
  --shadow-night: 0 2px 6px rgba(2, 7, 15, 0.32), 0 18px 44px -14px rgba(2, 7, 15, 0.58);
  --edge-light: inset 0 1px 0 rgba(255, 255, 255, 0.055);
  --white: #f9fbfa;
  --understand: #8db5e8;
  --understand-deep: #3a6fa8;
  --decide: #f0a078;
  --decide-deep: #b95739;
  --control: #e9c65b;
  --control-deep: #9c7a10;
  --generate: #9bc58d;
  --generate-deep: #497b3d;
  --danger: #f15046;
  --max: 1240px;
  --display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-synthesis: none;
}

body,
button,
a {
  -webkit-tap-highlight-color: transparent;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button {
  margin: 0;
  color: inherit;
  font: inherit;
}

h1,
h2,
h3,
p,
figure,
dl,
dd,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

h1,
h2,
h3 {
  line-height: 1;
}

section[id] {
  scroll-margin-top: 96px;
}

::selection {
  color: var(--night);
  background: var(--control);
}

:focus-visible {
  outline: 3px solid var(--control);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--night);
  background: var(--control);
  font-family: var(--mono);
  font-size: 11.4px;
  font-weight: 600;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page-shell {
  width: min(var(--max), calc(100% - 56px));
  margin-inline: auto;
}

.stat-rail,
.problem-strip,
.pipeline,
.game-list,
.release-list {
  list-style: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  color: var(--white);
  background: rgba(10, 20, 36, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.topbar__inner {
  width: min(var(--max), calc(100% - 56px));
  min-height: 66px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.brand {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--display);
  font-size: 17.6px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__mark {
  position: relative;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.66);
  transform: rotate(45deg);
}

.brand__mark::before,
.brand__mark::after,
.brand__mark span::before,
.brand__mark span::after {
  content: "";
  position: absolute;
  background: var(--control);
}

.brand__mark::before {
  top: 50%;
  left: -5px;
  width: 9px;
  height: 1px;
}

.brand__mark::after {
  top: 50%;
  right: -5px;
  width: 9px;
  height: 1px;
}

.brand__mark span::before {
  top: -5px;
  left: 50%;
  width: 1px;
  height: 9px;
}

.brand__mark span::after {
  bottom: -5px;
  left: 50%;
  width: 1px;
  height: 9px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 27px;
  font-family: var(--mono);
  font-size: 10.6px;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.nav a {
  position: relative;
  color: #acb8c8;
  transition: color 150ms ease;
}

.nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  background: var(--control);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 150ms ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--white);
}

.nav a.is-active::after {
  transform: scaleX(1);
}

.review-chip {
  justify-self: end;
  padding: 5px 10px;
  color: #ccd4df;
  border: 1px solid #43516a;
  font-family: var(--mono);
  font-size: 9.7px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: auto;
  padding: clamp(82px, 10vw, 144px) 0 clamp(76px, 9vw, 124px);
  text-align: center;
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(13, 23, 40, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 23, 40, 0.04) 1px, transparent 1px);
  background-size: 68px 68px;
}

.hero::before {
  content: "";
  position: absolute;
  top: -470px;
  left: 50%;
  width: 900px;
  height: 900px;
  border: 1px solid rgba(13, 23, 40, 0.08);
  border-radius: 50%;
  box-shadow:
    0 0 0 130px rgba(13, 23, 40, 0.022),
    0 0 0 260px rgba(13, 23, 40, 0.016);
  transform: translateX(-50%);
  pointer-events: none;
}

.hero__intro {
  position: relative;
  z-index: 1;
  max-width: 1120px;
}

/* ---- Hero with video background: text overlaid on the rollout wall ---- */
.hero--video {
  padding: clamp(56px, 6vw, 92px) 0 clamp(52px, 5.5vw, 84px);
  background-color: var(--night);
  background-image: none;
}

.hero--video::before { display: none; }   /* 浅色底的装饰圆环在深色上不合适 */

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero__bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 深色遮罩:压暗视频,保证文字对比度 */
.hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(10, 20, 36, 0.30), rgba(10, 20, 36, 0.42));
}

/* 文字块:毛玻璃底,让字从视频里浮出来 */
.hero--video .hero__intro {
  z-index: 1;
  position: relative;
  max-width: 1000px;
  margin-inline: auto;
  padding: clamp(18px, 2.2vw, 32px) 24px;
  background: none;
  border: 0;
  text-shadow:
    0 1px 2px rgba(10, 20, 36, 0.80),
    0 3px 14px rgba(10, 20, 36, 0.65);
}

/* 只在文字区域后面铺一层柔和暗晕(径向淡出,无硬边),压住视频里的亮格子 */
.hero--video .hero__intro::before {
  content: "";
  position: absolute;
  inset: -6% -10%;
  z-index: -1;
  background: radial-gradient(ellipse 58% 54% at 50% 50%,
    rgba(10, 20, 36, 0.72) 0%,
    rgba(10, 20, 36, 0.52) 45%,
    rgba(10, 20, 36, 0.22) 74%,
    rgba(10, 20, 36, 0) 100%);
  pointer-events: none;
}

/* 文字全部反白 */
.hero--video .hero__name { color: var(--white); }
.hero--video .hero__paper-title { color: rgba(249, 251, 250, 0.93); }
.hero--video .hero__lead { color: rgba(249, 251, 250, 0.92); }
.hero--video .hero__summary { color: rgba(249, 251, 250, 0.84); }
.hero--video .hero__authors { color: var(--white); }
.hero--video .hero__affiliations { color: rgba(249, 251, 250, 0.92); }
.hero--video .hero__authornote { color: rgba(249, 251, 250, 0.80); }

.hero--video .hero__venue {
  color: var(--white);
  background: rgba(141, 181, 232, 0.18);
  border-color: rgba(141, 181, 232, 0.45);
}

/* 按钮在深色上的适配 */
.hero--video .button--secondary {
  color: var(--white);
  border-color: rgba(249, 251, 250, 0.42);
}
.hero--video .button--secondary:hover {
  color: var(--night);
  background: var(--white);
  border-color: var(--white);
}

/* 无 backdrop-filter 支持时,用更实的底色兜底 */

/* 减少动效:不播视频,用海报静帧 */
@media (prefers-reduced-motion: reduce) {
  .hero__bg-video { display: none; }
  .hero__bg { background: center / cover no-repeat url("./assets/marquee-poster.webp"); }
}

.kicker,
.section-label,
.eyebrow {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10.6px;
  font-weight: 600;
  letter-spacing: 0.075em;
  line-height: 1.3;
  text-transform: uppercase;
}

.hero__venue {
  width: fit-content;
  margin: 0 auto 25px;
  padding: 7px 11px;
  color: var(--understand-deep);
  background: rgba(141, 181, 232, 0.1);
  border: 1px solid rgba(58, 111, 168, 0.32);
  font-family: var(--mono);
  font-size: 8.8px;
  font-weight: 600;
  letter-spacing: 0.075em;
  line-height: 1;
  text-transform: uppercase;
}

.hero h1 {
  margin-top: 0;
  font-family: var(--display);
  text-wrap: balance;
}

.hero__name {
  display: block;
  color: var(--ink);
  font-size: clamp(64px, 7.6vw, 112px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.74;
}

.hero__paper-title {
  display: block;
  max-width: 960px;
  margin: 35px auto 0;
  color: var(--ink-soft);
  font-family: var(--display);
  font-size: clamp(24.6px, 3.17vw, 42.2px);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.08;
  text-wrap: balance;
}

.hero__lead {
  max-width: 870px;
  margin: 39px auto 0;
  color: var(--ink);
  font-size: clamp(17.6px, 1.85vw, 23.8px);
  line-height: 1.45;
}

.hero__summary {
  max-width: 760px;
  margin: 17px auto 0;
  color: var(--muted);
  font-size: 13.2px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 30px;
}

.button {
  min-height: 43px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 9px 15px;
  border: 1px solid var(--ink);
  font-size: 12.3px;
  font-weight: 600;
  line-height: 1;
  transition:
    color 150ms ease,
    background 150ms ease,
    transform 150ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  color: var(--white);
  background: var(--ink);
}

.button--primary:hover {
  color: var(--ink);
  background: var(--control);
}

.button--secondary {
  background: rgba(255, 255, 255, 0.42);
}

.button--secondary:hover {
  background: var(--surface);
}

.button--disabled {
  color: var(--muted);
  border-color: var(--line-strong);
  cursor: not-allowed;
}

/* ---- Pill buttons with brand icons (hero actions) ---- */
.button--pill {
  gap: 9px;
  padding: 11px 20px;
  border-radius: 999px;
  color: var(--white);
  background: rgba(10, 20, 36, 0.55);
  border: 1px solid rgba(249, 251, 250, 0.30);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  text-shadow: none;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.button--pill:hover {
  color: var(--night);
  background: var(--white);
  border-color: var(--white);
}

/* 品牌图标是实心路径,必须用 fill 而不是页面默认的 stroke */
.button--pill .button__icon {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: currentColor;
  stroke: none;
}



.button--disabled:hover {
  transform: none;
}

.decision-console {
  position: relative;
  isolation: isolate;
  color: var(--white);
  background: var(--night);
  border: 1px solid #263851;
  box-shadow: 18px 18px 0 rgba(13, 23, 40, 0.13);
}

.decision-console::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -16px;
  right: -16px;
  width: 44%;
  height: 52%;
  border-top: 1px solid rgba(13, 23, 40, 0.3);
  border-right: 1px solid rgba(13, 23, 40, 0.3);
}

.decision-console__header,
.decision-console__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 13px;
  font-family: var(--mono);
  font-size: 8.8px;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.decision-console__header {
  border-bottom: 1px solid var(--night-line);
}

.console-id {
  color: #9cacbf;
}

.console-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #c9e7c2;
}

.console-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--generate);
  box-shadow: 0 0 0 4px rgba(155, 197, 141, 0.12);
}

.arena-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 7 / 4;
  background: #07101e;
}

.arena-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.88) contrast(1.08);
}

.arena-frame__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 10, 19, 0.12), rgba(4, 10, 19, 0.02) 48%, rgba(4, 10, 19, 0.42)),
    linear-gradient(90deg, rgba(4, 10, 19, 0.32), transparent 25%, transparent 75%, rgba(4, 10, 19, 0.2));
}

.viewfinder {
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: rgba(255, 255, 255, 0.72);
  border-style: solid;
}

.viewfinder--tl {
  top: 16px;
  left: 16px;
  border-width: 1px 0 0 1px;
}

.viewfinder--tr {
  top: 16px;
  right: 16px;
  border-width: 1px 1px 0 0;
}

.viewfinder--bl {
  bottom: 16px;
  left: 16px;
  border-width: 0 0 1px 1px;
}

.viewfinder--br {
  right: 16px;
  bottom: 16px;
  border-width: 0 1px 1px 0;
}

.arena-tag,
.arena-label {
  position: absolute;
  z-index: 2;
  padding: 4px 7px;
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
}

.arena-tag {
  bottom: 14px;
  color: #d7e0ec;
  background: rgba(5, 13, 24, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.19);
}

.arena-tag--time {
  left: 14px;
}

.arena-tag--rate {
  right: 14px;
}

.arena-label {
  border: 1px solid currentColor;
  background: rgba(5, 13, 24, 0.66);
}

.arena-label--player {
  top: 54%;
  left: 48%;
  color: #b9e5a9;
}

.arena-label--boss {
  top: 37%;
  right: 26%;
  color: #ff8d86;
}

.scan-line {
  position: absolute;
  z-index: 1;
  top: -2px;
  right: 0;
  left: 0;
  height: 2px;
  background: rgba(233, 198, 91, 0.65);
  box-shadow: 0 0 12px rgba(233, 198, 91, 0.45);
  animation: scan 4.8s linear infinite;
}

@keyframes scan {
  0% { top: -2px; opacity: 0; }
  8% { opacity: 0.8; }
  88% { opacity: 0.45; }
  100% { top: 100%; opacity: 0; }
}

.trace {
  display: grid;
}

.trace__row {
  --layer: var(--understand);
  position: relative;
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 38px 92px 1fr 12px;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  color: #8f9eb2;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--night-line);
  text-align: left;
  cursor: pointer;
  transition:
    color 180ms ease,
    background 180ms ease;
}

.trace__row:nth-child(2) {
  --layer: var(--decide);
}

.trace__row:nth-child(3) {
  --layer: var(--control);
}

.trace__row:nth-child(4) {
  --layer: var(--generate);
}

.trace__row::before {
  content: "";
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 0;
  width: 3px;
  background: var(--layer);
  transform: scaleY(0);
  transition: transform 180ms ease;
}

.trace__row:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.035);
}

.trace__row.is-active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.trace__row.is-active::before {
  transform: scaleY(1);
}

.trace__index {
  color: var(--layer);
  font-family: var(--mono);
  font-size: 9.7px;
  font-weight: 600;
}

.trace__label {
  font-family: var(--display);
  font-size: 15.8px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.trace__value {
  overflow: hidden;
  font-family: var(--mono);
  font-size: 8.8px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.trace__signal {
  width: 6px;
  height: 6px;
  justify-self: end;
  border: 1px solid var(--layer);
  border-radius: 50%;
}

.trace__row.is-active .trace__signal {
  background: var(--layer);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--layer) 18%, transparent);
}

.decision-console__footer {
  color: #7f8da1;
  border-top: 1px solid var(--night-line);
}

.decision-console__footer span:last-child {
  color: var(--control);
  font-size: 13.2px;
}

.section--overview {
  background: var(--paper-cool);
  border-top: 1px solid var(--line);
}

.section--overview .decision-console {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(340px, 0.85fr);
  grid-template-areas:
    "header header"
    "arena trace"
    "footer footer";
}

.section--overview .decision-console__header {
  grid-area: header;
}

.section--overview .arena-frame {
  grid-area: arena;
  aspect-ratio: 16 / 9;
}

.section--overview .trace {
  grid-area: trace;
  grid-template-rows: repeat(4, 1fr);
  border-left: 1px solid var(--night-line);
}

.section--overview .decision-console__footer {
  grid-area: footer;
}

.section--overview .trace__row {
  min-height: 0;
  grid-template-columns: 34px minmax(0, 1fr) 10px;
  grid-template-rows: auto auto;
  align-content: center;
  column-gap: 10px;
  row-gap: 4px;
}

.section--overview .trace__index {
  grid-row: 1 / 3;
}

.section--overview .trace__label {
  grid-column: 2;
  grid-row: 1;
}

.section--overview .trace__value {
  grid-column: 2;
  grid-row: 2;
}

.section--overview .trace__signal {
  grid-column: 3;
  grid-row: 1 / 3;
}

.stat-rail {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(32px, 4vw, 56px);
  border-top: 1px solid var(--line-strong);
}

.section--overview .stat-rail {
  margin-top: 32px;
}

.stat-rail__item {
  min-height: 78px;
  display: flex;
  align-items: baseline;
  gap: 11px;
  padding: 20px 22px;
  border-right: 1px solid var(--line-strong);
}

.stat-rail__item:first-child {
  border-left: 1px solid var(--line-strong);
}

.stat-rail__item strong {
  color: var(--ink);
  font-family: var(--display);
  font-size: clamp(29px, 2.82vw, 41.4px);
  font-weight: 700;
  line-height: 1;
}

.stat-rail__item span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8.8px;
  letter-spacing: 0.035em;
  line-height: 1.35;
  text-transform: uppercase;
}

.section {
  padding: clamp(38px, 3.7vw, 56px) 0;
}

.section--abstract {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.abstract-layout {
  display: grid;
  grid-template-columns: minmax(170px, 0.24fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(36px, 5vw, 76px);
}

.abstract-heading h2 {
  font-family: var(--display);
  font-size: clamp(41.4px, 5.28vw, 68.6px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 0.95;
}

.abstract-copy {
  max-width: 900px;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.36vw, 17.6px);
  line-height: 1.7;
}

.section--paper {
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: clamp(26px, 2.9vw, 42px);
}

.section-label {
  margin-bottom: 11px;
  color: var(--understand-deep);
}

.section-heading h2,
.dataset-copy h2 {
  max-width: 850px;
  font-family: var(--display);
  font-size: clamp(36px, 4.1vw, 55px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 0.95;
}

.section-heading--named {
  max-width: 900px;
}

.section-heading__claim {
  max-width: 820px;
  margin-top: 13px;
  color: var(--ink);
  font-family: var(--display);
  font-size: clamp(21px, 2.1vw, 27.5px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.08;
}

.section-heading__description {
  max-width: 820px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.problem-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.problem-strip > li {
  position: relative;
  min-height: 208px;
  display: grid;
  grid-template-columns: 42px 1fr;
  align-content: start;
  gap: 18px;
  padding: 24px 26px 24px 0;
  border-right: 1px solid var(--line-strong);
}

.problem-strip > li + li {
  padding-left: 30px;
}

.problem-strip > li:last-child {
  padding-right: 0;
  border-right: 0;
}

.problem-strip__ours {
  background: rgba(155, 197, 141, 0.12);
}

.problem-strip__symbol {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 15.8px;
}

.problem-strip__ours .problem-strip__symbol {
  color: var(--generate-deep);
  border-color: var(--generate);
}

.problem-strip__type {
  margin: 2px 0 14px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8.8px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.problem-strip h3 {
  max-width: 270px;
  font-family: var(--display);
  font-size: 25.5px;
  font-weight: 700;
  line-height: 1;
}

.problem-strip > li p:last-child {
  margin-top: 15px;
  color: var(--muted);
  font-size: 12.3px;
  line-height: 1.55;
}

.paper-figure {
  margin-top: clamp(28px, 3.4vw, 46px);
}

.paper-figure__image {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-strong);
}

.paper-figure__image img {
  width: 100%;
}

.paper-figure__open {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 9px;
  color: var(--white);
  background: rgba(10, 20, 36, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition:
    color 150ms ease,
    background 150ms ease;
}

.paper-figure__image:hover .paper-figure__open {
  color: var(--night);
  background: var(--control);
}

.paper-figure figcaption,
.dataset-figure figcaption {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding-top: 13px;
  color: var(--muted);
  font-size: 11.4px;
  line-height: 1.5;
}

.paper-figure figcaption span,
.dataset-figure figcaption span {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 8.8px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section--night {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--night);
  border-top: 1px solid #27364c;
}

.section--night::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.32;
  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: 82px 82px;
  pointer-events: none;
}

.section--night .page-shell {
  position: relative;
}

.section-heading--night .section-label {
  color: var(--control);
}

.section-heading--night h2 {
  max-width: 930px;
}

.section-heading--night .section-heading__claim {
  color: var(--white);
}

.section-heading--night .section-heading__description {
  color: #9ba9ba;
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--night-line);
}

.pipeline__stage {
  --layer: var(--understand);
  position: relative;
  min-height: 330px;
  padding: 24px 22px 26px;
  background: rgba(255, 255, 255, 0.025);
  border-top: 5px solid var(--layer);
  border-right: 1px solid var(--night-line);
}

.pipeline__stage:last-child {
  border-right: 0;
}

.pipeline__stage--decide {
  --layer: var(--decide);
}

.pipeline__stage--control {
  --layer: var(--control);
}

.pipeline__stage--generate {
  --layer: var(--generate);
}

.pipeline__stage:not(:last-child)::after {
  content: "→";
  position: absolute;
  z-index: 2;
  top: 24px;
  right: -13px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  color: var(--control);
  background: var(--night);
  border: 1px solid var(--night-line);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10.6px;
}

.pipeline__top {
  min-height: 56px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.pipeline__number {
  color: var(--layer);
  font-family: var(--display);
  font-size: 27.3px;
  font-weight: 700;
}

.pipeline__verb {
  max-width: 126px;
  color: #8d9caf;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.045em;
  line-height: 1.45;
  text-align: right;
  text-transform: uppercase;
}

.pipeline h3 {
  margin-top: 16px;
  font-family: var(--display);
  font-size: 33.4px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.pipeline__stage > p {
  margin-top: 17px;
  color: #aeb9c8;
  font-size: 16px;
  line-height: 1.6;
}

.pipeline ul {
  margin-top: 22px;
  list-style: none;
}

.pipeline li {
  position: relative;
  padding: 8px 0 8px 15px;
  color: #d3dae4;
  border-top: 1px solid var(--night-line);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.35;
}

.pipeline li::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 1px;
  width: 5px;
  height: 5px;
  background: var(--layer);
}

.loop-return {
  display: grid;
  grid-template-columns: auto minmax(0, 580px) 1fr;
  align-items: center;
  gap: 18px;
  margin-top: 19px;
  color: #aeb9c8;
  font-size: 12.3px;
}

.loop-return > span:first-child {
  color: var(--generate);
  font-size: 21.1px;
}

.loop-return strong {
  color: var(--white);
}

.loop-return__rule {
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--night-line) 0 7px, transparent 7px 13px);
}

.paper-figure--dark .paper-figure__image {
  border-color: #44536a;
}

.paper-figure--dark figcaption {
  color: #8f9caf;
}

.paper-figure--dark figcaption span {
  color: var(--control);
}

.control-modes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 34px;
  background: var(--night-line);
  border: 1px solid var(--night-line);
}

.control-modes article {
  padding: 22px 24px;
  background: var(--night-soft);
}

.control-modes__tag {
  display: inline-block;
  padding: 5px 11px;
  color: var(--night);
  background: var(--control);
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.control-modes h3 {
  margin-top: 10px;
  font-family: var(--display);
  font-size: 29px;
  font-weight: 700;
}

.control-modes article > p:not(.control-modes__tag) {
  max-width: 520px;
  margin-top: 14px;
  color: #9faebe;
  font-size: 16.5px;
}

.control-modes code {
  display: block;
  margin-top: 24px;
  padding: 15px 17px;
  color: #dce5ee;
  background: #08111f;
  border-left: 3px solid var(--control);
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.7;
  white-space: normal;
}

.section--evidence {
  background: var(--paper-cool);
  border-top: 1px solid var(--line);
}

.system-results {
  color: var(--white);
  background: var(--night);
  border: 1px solid #1f3047;
}

.system-results__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--night-line);
}

.system-results .eyebrow {
  color: var(--control);
}

.system-results__header h3 {
  margin-top: 9px;
  font-family: var(--display);
  font-size: clamp(28.2px, 3.52vw, 42.2px);
  font-weight: 700;
}

.judge-tabs {
  display: flex;
  flex: 0 0 auto;
  border: 1px solid #40516a;
}

.judge-tabs button {
  padding: 9px 12px;
  color: #97a5b7;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 8.8px;
  font-weight: 600;
}

.judge-tabs button + button {
  border-left: 1px solid #40516a;
}

.judge-tabs button:hover {
  color: var(--white);
}

.judge-tabs button.is-active {
  color: var(--night);
  background: var(--control);
}

.preference-pairs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-bottom: 1px solid var(--night-line);
}

.preference-pairs > div {
  display: grid;
  grid-template-columns: auto minmax(180px, 300px);
  align-items: center;
  gap: 24px;
  padding: 34px 30px;
}

.preference-pairs > div:first-child {
  border-right: 1px solid var(--night-line);
}

.preference-pairs__value {
  color: var(--generate);
  font-family: var(--display);
  font-size: clamp(44px, 5.28vw, 66.9px);
  font-weight: 700;
  line-height: 0.8;
}

.preference-pairs p {
  color: #91a0b2;
  font-size: 12.3px;
  line-height: 1.5;
}

.preference-pairs strong {
  color: var(--white);
  font-weight: 500;
}

.score-table-wrap {
  overflow-x: auto;
}

.score-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.score-table th,
.score-table td {
  padding: 15px 30px;
  border-bottom: 1px solid var(--night-line);
  text-align: left;
}

.score-table thead th {
  color: #8190a4;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.score-table tbody th {
  color: #a6b3c3;
  font-size: 15px;
  font-weight: 500;
}

.score-table td {
  color: #c8d1dc;
  font-family: var(--mono);
  font-size: 15px;
}

.score-table__ours th,
.score-table__ours td {
  color: var(--white);
  background: rgba(155, 197, 141, 0.07);
  font-weight: 600;
}

.score-table__ours th::before {
  content: "●";
  margin-right: 9px;
  color: var(--generate);
  font-size: 8px;
}

.result-note {
  padding: 12px 24px 14px;
  color: #74849a;
  font-size: 9.7px;
}

.layer-results {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: start;
  gap: 20px;
  margin-top: 20px;
  min-width: 0;
}

.layer-result {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 21px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.layer-result--l1 {
  border-top: 5px solid var(--understand);
}

.layer-result--l2 {
  border-top: 5px solid var(--decide);
}

.layer-result__heading .eyebrow {
  color: var(--understand-deep);
}

.layer-result--l2 .eyebrow {
  color: var(--decide-deep);
}

.layer-result h3 {
  max-width: 560px;
  margin-top: 10px;
  font-family: var(--display);
  font-size: 29.9px;
  font-weight: 700;
  line-height: 1;
}

.mini-score-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.mini-score-grid > div {
  padding: 17px 13px 18px 0;
  border-right: 1px solid var(--line);
}

.mini-score-grid > div + div {
  padding-left: 13px;
}

.mini-score-grid > div:last-child {
  border-right: 0;
}

.mini-score-grid span,
.mini-score-grid small {
  display: block;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  line-height: 1.4;
}

.mini-score-grid span {
  min-height: 24px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.mini-score-grid strong {
  display: block;
  margin: 7px 0 5px;
  color: var(--understand-deep);
  font-family: var(--display);
  font-size: 33.4px;
  line-height: 1;
}

.layer-result__foot {
  margin-top: 20px;
  padding-top: 24px;
  color: var(--muted);
  font-size: 10.6px;
  line-height: 1.55;
}

.state-table-wrap {
  width: 100%;
  min-width: 0;
  margin-top: 24px;
  padding-top: 15px;
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

.table-scroll-hint {
  display: none;
  margin-bottom: 9px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.state-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

.state-table th,
.state-table td {
  padding: 12px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

.state-table thead th {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.025em;
  line-height: 1.35;
  text-transform: uppercase;
}

.state-table thead th:first-child {
  width: 112px;
}

.state-table tbody th {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.state-table td {
  color: var(--decide-deep);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.state-table td:nth-child(3) {
  color: var(--muted);
}

.state-table td:nth-child(5) {
  color: var(--generate-deep);
}

.state-table td:last-child {
  color: var(--muted);
}

.transfer-result {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(560px, 1.22fr);
  gap: 30px;
  margin-top: 18px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 5px solid var(--generate);
}

.transfer-result__copy .eyebrow {
  color: var(--generate-deep);
}

.transfer-result__copy h3 {
  max-width: 510px;
  margin-top: 10px;
  font-family: var(--display);
  font-size: 29.9px;
  font-weight: 700;
  line-height: 1;
}

.transfer-result__copy > p:last-child {
  max-width: 540px;
  margin-top: 17px;
  color: var(--muted);
  font-size: 11.4px;
  line-height: 1.62;
}

.transfer-table-wrap {
  width: 100%;
  min-width: 0;
  overflow-x: auto;
}

.transfer-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.transfer-table th,
.transfer-table td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.transfer-table thead th {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.transfer-table tbody th {
  color: var(--ink-soft);
  font-size: 14.5px;
  font-weight: 600;
}

.transfer-table td {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14.5px;
  font-weight: 600;
}

.transfer-table td small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.transfer-table__ours th,
.transfer-table__ours td {
  color: var(--generate-deep);
  background: rgba(155, 197, 141, 0.1);
}

.transfer-table-wrap > p {
  margin-top: 9px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
}

.mechanics-chart {
  margin-top: 24px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.mechanics-chart__legend {
  display: flex;
  gap: 18px;
  margin-bottom: 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.mechanics-chart__legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.mechanics-chart__legend i {
  width: 9px;
  height: 9px;
}

.legend-follow {
  background: var(--decide);
}

.legend-name {
  background: var(--line-strong);
}

.mechanics-row {
  display: grid;
  grid-template-columns: 92px 1fr 1fr;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.mechanics-row > span {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 8px;
}

.bar-track {
  position: relative;
  height: 22px;
  overflow: hidden;
  background: #eef1f2;
}

.bar-track i {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--bar);
}

.bar-follow {
  background: var(--decide);
}

.bar-name {
  background: #bdc6cc;
}

.bar-track b {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 7px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 8px;
  transform: translateY(-50%);
}

.section--dataset {
  color: var(--white);
  background: #182537;
  border-top: 1px solid #2f4054;
}

.dataset-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.76fr);
  align-items: center;
  gap: clamp(36px, 5vw, 70px);
}

.dataset-copy .section-label {
  color: var(--control);
}

.dataset-copy h2 {
  max-width: 690px;
}

.dataset-copy__strap {
  max-width: 690px;
  margin-top: 20px;
  color: var(--white);
  font-family: var(--display);
  font-size: clamp(24.6px, 2.82vw, 37px);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.05;
}

.dataset-copy__lead {
  max-width: 670px;
  margin-top: 22px;
  color: #e8edf3;
  font-size: 17.6px;
  line-height: 1.45;
}

.dataset-copy > p:not(.section-label, .dataset-copy__strap, .dataset-copy__lead) {
  max-width: 680px;
  margin-top: 18px;
  color: #a8b4c3;
  font-size: 13.2px;
  line-height: 1.7;
}

.dataset-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 34px;
  border-top: 1px solid #3b4b60;
}

.dataset-facts > div {
  padding: 20px 15px 20px 0;
  border-right: 1px solid #3b4b60;
  border-bottom: 1px solid #3b4b60;
}

.dataset-facts > div:nth-child(even) {
  padding-left: 20px;
  border-right: 0;
}

.dataset-facts dt {
  color: var(--control);
  font-family: var(--display);
  font-size: clamp(34.3px, 3.52vw, 47.5px);
  font-weight: 700;
  line-height: 1;
}

.dataset-facts dd {
  margin-top: 4px;
  color: #92a0b2;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.game-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 25px;
}

.game-list li {
  padding: 6px 9px;
  color: #cbd5df;
  border: 1px solid #46576d;
  font-family: var(--mono);
  font-size: 8px;
}

.dataset-figure {
  margin: 0;
}

.dataset-figure .paper-figure__image {
  border-color: #506077;
  box-shadow: 16px 16px 0 rgba(3, 10, 19, 0.18);
}

.dataset-figure figcaption {
  color: #91a0b1;
}

.dataset-figure figcaption span {
  color: var(--control);
}

.section--release {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.release-list {
  border-top: 1px solid var(--ink);
}

.release-list > li {
  min-height: 62px;
  display: grid;
  grid-template-columns: 120px 1fr auto;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.release-list__type,
.release-list__status {
  font-family: var(--mono);
  font-size: 8.8px;
  font-weight: 600;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.release-list__type {
  color: var(--understand-deep);
}

.release-list strong {
  font-family: var(--display);
  font-size: 22.9px;
  font-weight: 600;
}

.release-list__status {
  padding: 6px 9px;
  color: var(--muted);
  border: 1px solid var(--line);
}

.release-list__status--available {
  color: var(--generate-deep);
  border-color: var(--generate);
  transition:
    color 150ms ease,
    background 150ms ease;
}

.release-list__status--available:hover {
  color: var(--night);
  background: var(--generate);
}

.hero__authors {
  max-width: 980px;
  margin: 38px auto 0;
}

.hero__authors {
  color: var(--ink);
  font-family: var(--display);
  font-size: clamp(16.7px, 1.67vw, 21.1px);
  font-weight: 600;
  line-height: 1.55;
  text-align: center;
}

.hero__affiliations {
  max-width: 980px;
  margin: 12px auto 0;
  color: var(--ink-soft);
  font-size: clamp(13.2px, 1.32vw, 15.8px);
  line-height: 1.5;
  text-align: center;
}

.hero__authornote {
  max-width: 860px;
  margin: 14px auto 0;
  color: var(--ink-soft);
  font-size: clamp(10.6px, 1.01vw, 12.3px);
  line-height: 1.6;
  text-align: center;
  opacity: 0.85;
}

.hero__authors sup,
.hero__affiliations sup,
.hero__authornote sup {
  font-size: 0.68em;
  vertical-align: super;
  line-height: 0;
}

.author-list {
  color: var(--ink);
  font-size: clamp(15px, 1.5vw, 18.5px);
  line-height: 1.7;
}

.author-list span {
  white-space: nowrap;
}

.affiliations {
  margin-top: 9px;
  color: var(--muted);
  font-size: 12.3px;
}

.author-notes {
  margin-top: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  line-height: 1.65;
}

.hero__authors + .hero__lead {
  margin-top: 28px;
}

.citation-block {
  margin-top: 36px;
  border: 1px solid var(--line);
}

.citation-block__header {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.citation-block__header h3 {
  font-family: var(--display);
  font-size: 19.4px;
  font-weight: 600;
}

.copy-button {
  padding: 7px 10px;
  color: var(--understand-deep);
  background: transparent;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
}

.copy-button:hover {
  color: var(--night);
  background: var(--control);
  border-color: var(--control);
}

.citation-block pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  color: #d6deea;
  background: var(--night);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
}

footer {
  color: #9aa7b7;
  background: var(--night);
  border-top: 1px solid var(--night-line);
}

.footer-inner {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-family: var(--mono);
  font-size: 8.8px;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.footer-inner strong {
  color: var(--white);
}

.footer-inner a {
  color: var(--control);
}

@media (max-width: 1120px) {
  .hero__name {
    font-size: clamp(91.5px, 12.32vw, 140.8px);
  }

  .pipeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .pipeline__stage {
    min-height: 292px;
  }

  .pipeline__stage:nth-child(2) {
    border-right: 0;
  }

  .pipeline__stage:nth-child(3),
  .pipeline__stage:nth-child(4) {
    border-top-width: 5px;
    border-top-color: var(--layer);
    border-bottom: 0;
  }

  .pipeline__stage:nth-child(2)::after {
    content: "↓";
    top: auto;
    right: 24px;
    bottom: -14px;
  }

  .pipeline__stage:nth-child(3)::after {
    right: -13px;
  }

  .dataset-layout {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 40px;
  }
}

@media (max-width: 980px) {
  .topbar__inner {
    grid-template-columns: auto 1fr auto;
  }

  .nav {
    gap: 18px;
  }

  .hero {
    min-height: auto;
  }

  .hero__name {
    font-size: clamp(77.4px, 14.96vw, 119.7px);
  }

  .hero__paper-title {
    font-size: clamp(27.3px, 4.84vw, 44.9px);
  }

  .preference-pairs {
    grid-template-columns: 1fr;
  }

  .preference-pairs > div:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--night-line);
  }

  .section--overview .decision-console {
    width: 100%;
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "arena"
      "trace"
      "footer";
  }

  .section--overview .trace {
    border-top: 1px solid var(--night-line);
    border-left: 0;
  }

  .section--overview .trace__row {
    min-height: 62px;
  }

  .stat-rail__item {
    min-height: 88px;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
  }

  .problem-strip {
    grid-template-columns: 1fr;
  }

  .problem-strip > li,
  .problem-strip > li + li,
  .problem-strip > li:last-child {
    min-height: auto;
    padding: 26px 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .problem-strip > li:last-child {
    border-bottom: 0;
  }

  .problem-strip h3 {
    max-width: none;
  }

  .layer-results {
    grid-template-columns: 1fr;
  }

  .abstract-layout,
  .transfer-result {
    grid-template-columns: 1fr;
  }

  .transfer-result {
    gap: 28px;
  }

  .dataset-layout {
    grid-template-columns: 1fr;
  }

  .dataset-figure {
    width: min(650px, 100%);
  }
}

@media (max-width: 760px) {
  section[id] {
    scroll-margin-top: 116px;
  }

  .page-shell,
  .topbar__inner {
    width: min(100% - 30px, var(--max));
  }

  .topbar__inner {
    min-height: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    padding: 12px 0 0;
  }

  .brand {
    flex: 1;
  }

  .review-chip {
    margin-left: auto;
  }

  .nav {
    order: 3;
    width: calc(100% + 30px);
    justify-content: flex-start;
    gap: 22px;
    margin: 10px -15px 0;
    padding: 10px 15px 12px;
    overflow-x: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    scrollbar-width: none;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .nav a {
    flex: 0 0 auto;
  }

  .nav a::after {
    bottom: -7px;
  }

  .hero {
    padding: 58px 0 74px;
    background-size: 48px 48px;
  }

  .hero__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .button--primary {
    grid-column: 1 / -1;
  }

  .button--disabled {
    grid-column: 1 / -1;
  }

  .abstract-layout {
    gap: 30px;
  }

  .stat-rail {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-rail__item:nth-child(2) {
    border-right: 1px solid var(--line-strong);
  }

  .stat-rail__item:nth-child(3),
  .stat-rail__item:nth-child(4) {
    border-top: 1px solid var(--line-strong);
  }

  .stat-rail__item:nth-child(3) {
    border-left: 1px solid var(--line-strong);
  }

  .pipeline {
    grid-template-columns: 1fr;
  }

  .pipeline__stage,
  .pipeline__stage:nth-child(2),
  .pipeline__stage:nth-child(3) {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--night-line);
  }

  .pipeline__stage:last-child {
    border-bottom: 0;
  }

  .pipeline__stage:not(:last-child)::after,
  .pipeline__stage:nth-child(2)::after,
  .pipeline__stage:nth-child(3)::after {
    content: "↓";
    top: auto;
    right: 24px;
    bottom: -14px;
  }

  .loop-return {
    grid-template-columns: auto 1fr;
  }

  .loop-return__rule {
    display: none;
  }

  .control-modes {
    grid-template-columns: 1fr;
  }

  .system-results__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .preference-pairs {
    grid-template-columns: 1fr;
  }

  .preference-pairs > div:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--night-line);
  }

  .release-list > li {
    grid-template-columns: 80px 1fr;
    gap: 8px 16px;
    padding: 17px 0;
  }

  .release-list__status {
    grid-column: 2;
    width: fit-content;
  }

  .transfer-result {
    padding: 24px 20px;
  }
}

@media (max-width: 540px) {
  body {
    font-size: 14.1px;
  }

  .review-chip {
    font-size: 8px;
  }

  .hero__name {
    font-size: clamp(45.8px, 14.96vw, 81px);
  }

  .hero__paper-title {
    margin-top: 17px;
    font-size: 27.3px;
    line-height: 1.06;
  }

  .hero__lead {
    font-size: 15.8px;
  }

  .decision-console {
    box-shadow: 9px 9px 0 rgba(13, 23, 40, 0.13);
  }

  .trace__row {
    grid-template-columns: 30px 74px 1fr 8px;
    gap: 7px;
    padding-inline: 10px;
  }

  .trace__label {
    font-size: 14.1px;
  }

  .trace__value {
    font-size: 8px;
  }

  .arena-label {
    display: none;
  }

  .section-heading h2,
  .abstract-heading h2,
  .dataset-copy h2 {
    font-size: 42.2px;
  }

  .paper-figure figcaption,
  .dataset-figure figcaption {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .pipeline__stage {
    padding: 23px 20px;
  }

  .control-modes article {
    padding: 24px 20px;
  }

  .system-results__header,
  .preference-pairs > div,
  .score-table th,
  .score-table td,
  .result-note {
    padding-right: 20px;
    padding-left: 20px;
  }

  .preference-pairs > div {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .preference-pairs__value {
    font-size: 52.8px;
  }

  .score-table {
    min-width: 0;
    table-layout: fixed;
  }

  .score-table th,
  .score-table td {
    padding: 11px 8px;
    overflow-wrap: anywhere;
  }

  .score-table th:first-child {
    width: 46%;
    padding-left: 14px;
  }

  .score-table td {
    font-size: 8px;
  }

  .score-table thead th {
    font-size: 7px;
    line-height: 1.35;
  }

  .score-table tbody th {
    font-size: 8.8px;
    line-height: 1.35;
  }

  .score-table__ours th::before {
    margin-right: 5px;
  }

  .layer-result {
    padding: 23px 20px;
  }

  .mini-score-grid {
    grid-template-columns: 1fr;
  }

  .mini-score-grid > div,
  .mini-score-grid > div + div {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 8px;
    padding: 13px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mini-score-grid > div:last-child {
    border-bottom: 0;
  }

  .mini-score-grid span {
    min-height: 0;
  }

  .mini-score-grid strong {
    grid-row: 1 / 3;
    grid-column: 2;
    margin: 0;
  }

  .state-table th,
  .state-table td {
    padding: 9px 4px;
  }

  .table-scroll-hint {
    display: block;
  }

  .state-table thead th {
    font-size: 6.5px;
  }

  .state-table thead th:first-child {
    width: 68px;
  }

  .state-table tbody th {
    font-size: 7.5px;
  }

  .state-table td {
    font-size: 8px;
  }

  .mechanics-chart__legend {
    flex-direction: column;
    gap: 5px;
  }

  .mechanics-row {
    grid-template-columns: 80px 1fr;
  }

  .mechanics-row .bar-track:last-child {
    grid-column: 2;
  }

  .dataset-facts {
    grid-template-columns: 1fr;
  }

  .dataset-facts > div,
  .dataset-facts > div:nth-child(even) {
    padding: 16px 0;
    border-right: 0;
  }

  .release-list strong {
    font-size: 19.4px;
  }

  .citation-block__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ==========================================================================
   质感层 —— 去扁平化(不触碰 hero / topbar)
   ========================================================================== */

/* --- 章节底色:极浅垂直渐变替代纯色平铺 --- */
.section--abstract {
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 58%, #f6f8fb 100%);
}

.section--overview {
  background: linear-gradient(180deg, #eaeff5 0%, var(--paper-cool) 55%, #e2e9f0 100%);
}

.section--paper {
  background: linear-gradient(180deg, #f6f8fb 0%, var(--paper) 60%, #edf1f6 100%);
}

.section--evidence {
  background: linear-gradient(180deg, #edf1f6 0%, var(--paper-cool) 100%);
}

.section--release {
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

/* 暗色章节:主色微光,不再是一块死平的深蓝 */
.section--night {
  background:
    radial-gradient(880px 420px at 10% -8%, rgba(141, 181, 232, 0.13), transparent 62%),
    radial-gradient(720px 380px at 92% 106%, rgba(155, 197, 141, 0.10), transparent 60%),
    linear-gradient(180deg, #0c1729 0%, var(--night) 46%, #081120 100%);
}

.section--dataset {
  background:
    radial-gradient(760px 400px at 88% -12%, rgba(233, 198, 91, 0.11), transparent 60%),
    radial-gradient(680px 360px at 6% 110%, rgba(141, 181, 232, 0.09), transparent 62%),
    linear-gradient(180deg, #1a2739 0%, #182537 50%, #141f2f 100%);
}

/* --- 图片:圆角 + 柔和投影,替换硬边偏移阴影 --- */
.paper-figure__image {
  border-radius: var(--radius);
  border-color: rgba(13, 26, 45, 0.13);
  box-shadow: var(--shadow-lg);
  transition: box-shadow 0.28s ease, transform 0.28s ease;
}

.paper-figure__image:hover {
  transform: translateY(-2px);
  box-shadow:
    0 3px 6px rgba(11, 19, 34, 0.06),
    0 18px 40px -10px rgba(11, 19, 34, 0.18),
    0 44px 80px -26px rgba(11, 19, 34, 0.26);
}

.dataset-figure .paper-figure__image,
.section--night .paper-figure__image {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-night), var(--edge-light);
}

.dataset-figure .paper-figure__image:hover,
.section--night .paper-figure__image:hover {
  box-shadow:
    0 4px 10px rgba(2, 7, 15, 0.36),
    0 26px 60px -16px rgba(2, 7, 15, 0.62),
    var(--edge-light);
}

/* --- 浅色卡片:圆角 + 分层投影 --- */
.problem-strip {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.layer-result,
.transfer-result {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.citation-block {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.stat-rail {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top-color: var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

/* --- 暗色卡片:圆角 + 顶部内高光,让边缘有厚度 --- */
.pipeline,
.control-modes,
.system-results {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-night), var(--edge-light);
}

.system-results {
  border-color: rgba(255, 255, 255, 0.10);
}

.pipeline,
.control-modes {
  border-color: rgba(255, 255, 255, 0.10);
}

/* --- 表格滚动壳与代码块跟着圆角 --- */
.state-table-wrap,
.transfer-table-wrap,
.score-table-wrap {
  border-radius: var(--radius-sm);
}

.control-modes code {
  border-radius: var(--radius-sm);
}

/* --- 小控件:徽章、按钮、单元格边角一致收圆 --- */
.paper-figure__open,
.copy-button,
.judge-tabs button,
.control-modes__tag,
.dataset-games li,
.result-note {
  border-radius: 6px;
}

.problem-strip__symbol {
  border-radius: var(--radius-sm);
}

/* --- 微排版:8px 级 mono 标签太小,读起来廉价,统一提到 10.5–12.5px(hero 不动) --- */
.section-label,
.eyebrow {
  font-size: 11.4px;
}

.paper-figure figcaption,
.dataset-figure figcaption {
  font-size: 12.8px;
}

.paper-figure figcaption span,
.dataset-figure figcaption span {
  font-size: 10.5px;
}

.problem-strip__type,
.judge-tabs button,
.footer-inner {
  font-size: 11px;
}

/* stat-rail 改成上下堆叠:标签放大到 11px 也不会被挤成两行 */
.stat-rail__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
}

.stat-rail__item span {
  font-size: 11px;
  letter-spacing: 0.06em;
}

.paper-figure__open,
.pipeline__verb,
.mini-score-grid small,
.transfer-table-wrap > p,
.dataset-facts dd,
.game-list li {
  font-size: 10.5px;
}

.result-note,
.layer-result__foot {
  font-size: 12.5px;
}

/* --- 数字统一等宽数位,列与列不再抖 --- */
.stat-rail__item strong,
.dataset-facts dt,
.mini-score-grid strong,
.preference-pairs strong,
.score-table,
.state-table,
.transfer-table,
.result-note,
.layer-result__foot,
.transfer-table-wrap > p {
  font-variant-numeric: tabular-nums;
}

/* --- 展示级字距再收一点,标题更紧实 --- */
.section-heading h2,
.abstract-heading h2,
.dataset-copy h2 {
  letter-spacing: -0.024em;
}

.section-heading__claim {
  letter-spacing: -0.012em;
}

/* --- Dataset 数字区做成卡,不再是裸的分隔线 --- */
.dataset-facts {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-top-color: rgba(255, 255, 255, 0.10);
  border-radius: var(--radius);
  box-shadow: var(--edge-light);
}

.dataset-facts > div {
  padding-left: 20px;
  border-right-color: rgba(255, 255, 255, 0.09);
  border-bottom-color: rgba(255, 255, 255, 0.09);
}

.dataset-facts > div:nth-child(n + 3) {
  border-bottom: 0;
}

/* --- 暗色章节的网格纹理压淡,让主色微光透出来 --- */
.section--night::before {
  opacity: 0.22;
}

/* --- "Open full figure" 徽章原来常驻,会压住图里的内容;改成悬停/聚焦时浮现 --- */
.paper-figure__open {
  opacity: 0;
  transform: translateY(5px);
  pointer-events: none;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.paper-figure__image:hover .paper-figure__open,
.paper-figure__image:focus-visible .paper-figure__open {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .paper-figure__open {
    transition: none;
  }
}

/* 触屏没有 hover,给个常驻的小提示放在图注右端 */
.paper-figure figcaption,
.dataset-figure figcaption {
  position: relative;
}

@media (hover: none) {
  .paper-figure__open {
    opacity: 1;
    transform: none;
    background: rgba(10, 20, 36, 0.72);
  }
}

/* --- 三卡带:两条 baseline 上浅红底,与 teaser 图里的红/绿分组对齐 --- */
.problem-strip__baseline {
  background: rgba(241, 80, 70, 0.075);
}

.problem-strip__baseline .problem-strip__symbol {
  color: #b8382f;
  border-color: rgba(241, 80, 70, 0.42);
}

.problem-strip__baseline .problem-strip__type {
  color: #a8443c;
}

.problem-strip__ours .problem-strip__type {
  color: var(--generate-deep);
}

/* --- Direct / Director control:标签提到框外居中,单独成两张卡 --- */
.control-modes {
  gap: 22px;
  overflow: visible;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.control-mode {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.control-modes__tag {
  align-self: center;
  margin: 0 0 15px;
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: 0.13em;
  box-shadow: 0 2px 10px rgba(233, 198, 91, 0.22);
}

.control-modes article {
  flex: 1;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: var(--shadow-night), var(--edge-light);
}

.control-modes h3 {
  margin-top: 0;
}

/* 两张卡文字行数不同,让说明段吃掉多余高度,代码块底端对齐 */
.control-modes article {
  display: flex;
  flex-direction: column;
}

.control-modes article > p {
  flex: 1;
}

/* --- 缩写首字母下划线:压细一点、离基线远一点,别糊在字母上 --- */
.dataset-copy__lead u {
  text-decoration-line: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  text-decoration-color: var(--control);
}

/* ==========================================================================
   分拍播放器(结果区)+ 1h rollout
   ========================================================================== */

.beats {
  margin-top: 26px;
}

.beats__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.beats__tab {
  padding: 9px 18px;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.beats__tab:hover {
  border-color: var(--line-strong);
}

.beats__tab.is-active {
  color: var(--white);
  background: var(--night);
  border-color: var(--night);
}

.beat-clip {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 20px;
  align-items: start;
}

.beat-stage {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  background: #07101e;
}

.beat-stage__video {
  display: block;
  width: 100%;
  aspect-ratio: 13 / 7.5;
  object-fit: cover;
}

.beat-stage__seam {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  margin: 0;
  padding: 9px 13px;
  color: var(--white);
  background: rgba(10, 20, 36, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  text-align: center;
}

.beat-side {
  min-width: 0;
}

.beat-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.beat {
  padding: 15px 17px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius-sm);
  opacity: 0.5;
  transition: opacity 0.2s ease, border-left-color 0.2s ease, box-shadow 0.2s ease;
}

.beat.is-active {
  opacity: 1;
  border-left-color: var(--decide-deep);
  box-shadow: var(--shadow-sm);
}

.beat__n {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.beat__dist {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
}

.beat__dist strong {
  color: var(--ink);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}

.beat__decision {
  margin: 9px 0 0;
}

.beat__decision code {
  display: inline-block;
  padding: 5px 11px;
  color: var(--decide-deep);
  background: rgba(240, 160, 120, 0.13);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.beat__reason {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.beat-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.beat-btn {
  padding: 9px 16px;
  color: var(--white);
  background: var(--night);
  border: 1px solid var(--night);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity 0.18s ease;
}

.beat-btn:not(.is-active) {
  color: var(--ink-soft);
  background: var(--surface);
  border-color: var(--line-strong);
}

.beat-btn:hover {
  opacity: 0.85;
}

.beat-btn--ghost {
  color: var(--understand-deep);
  background: none;
  border-color: var(--understand-deep);
}

/* --- 1h rollout --- */
.rollout {
  margin: 0;
}

.rollout__video {
  display: block;
  width: 100%;
  aspect-ratio: 13 / 7.5;
  background: #07101e;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow-night), var(--edge-light);
}

.rollout figcaption {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding-top: 13px;
  color: #91a0b1;
  font-size: 12.8px;
  line-height: 1.5;
}

.rollout figcaption span {
  color: var(--control);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@media (max-width: 980px) {
  .beat-clip {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* hidden 属性会被 display:grid 盖掉,显式补上 */
.beat-clip[hidden] {
  display: none;
}

/* --- 覆盖式播放键:默认停在首帧,手动点才播 --- */
.beat-stage__play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  width: 100%;
  padding: 0;
  background: rgba(10, 20, 36, 0.28);
  border: 0;
  cursor: pointer;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.beat-stage__play svg {
  width: 34px;
  height: 34px;
  padding: 15px;
  box-sizing: content-box;
  fill: var(--white);
  stroke: none;
  background: rgba(10, 20, 36, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s ease;
}

.beat-stage__play:hover {
  background: rgba(10, 20, 36, 0.18);
}

.beat-stage__play:hover svg {
  transform: scale(1.07);
}

.beat-clip.is-playing .beat-stage__play {
  opacity: 0;
  pointer-events: none;
}

/* 原生 controls 在底部,接缝提示挪到顶部避让 */
.beat-stage__seam {
  top: 14px;
  bottom: auto;
}