:root {
  --canvas: #f8f8f6;
  --surface: #fcfcfb;
  --surface-subtle: #ececea;
  --surface-strong: #5a5a57;
  --ink: #2e2e2c;
  --text-secondary: #70716d;
  --text-inverse: #fff;
  --border: #b7b8b4;
  --connector: #2f2f2d;
  --state: #3e6378;
  --state-soft: #7895a6;
  --focus: #e7a12b;
  --highlight: #f2c14a;
  --warning: #d96c2f;
  --action: #820817;
  --canvas-rgb: 248 248 246;
  --ink-rgb: 46 46 44;
  --connector-rgb: 47 47 45;
  --state-rgb: 62 99 120;
  --highlight-rgb: 242 193 74;
  --border-rgb: 183 184 180;
  --inverse-rgb: 255 255 255;
  --hero-ink-rgb: 29 30 29;
  --hero-deep: #171817;
  --hero-mid: #262725;
  --hero-light: #676a66;
  --inverse-strong: #e2e3df;
  --inverse-secondary: #d9dad6;
  --inverse-muted: #bbbcb8;
  --inverse-quiet: #a8a9a5;
  --inverse-border: #777874;
  --state-readable: #9ab4c2;
  --page: min(1420px, calc(100vw - 64px));
  --sans: Arial, "Liberation Sans", "DejaVu Sans", sans-serif;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --header-height: 76px;
  --enter: 560ms cubic-bezier(.22, 1, .36, 1);
  --update: 220ms cubic-bezier(.4, 0, .2, 1);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--canvas);
  color: var(--ink);
  font: 400 16px/1.55 var(--sans);
}
body::before {
  position: fixed;
  z-index: 100;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.025'/%3E%3C/svg%3E");
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img, video, svg { display: block; max-width: 100%; }
::selection { background: var(--highlight); color: var(--ink); }
:focus-visible { outline: 3px solid rgb(var(--state-rgb) / 65%); outline-offset: 3px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 200; top: -80px; left: 16px; padding: 10px 14px; background: var(--surface); color: var(--ink); transition: top var(--update); }
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 0 max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2));
  color: var(--text-inverse);
  transition: color var(--update), background var(--update), box-shadow var(--update);
}
.site-header.is-scrolled, .site-header.is-open { background: rgb(var(--canvas-rgb) / 96%); color: var(--ink); box-shadow: 0 1px 0 rgb(var(--ink-rgb) / 16%); }
.brand { height: var(--header-height); display: flex; flex: 0 0 auto; align-items: center; text-decoration: none; }
.brand-logo { width: 188px; height: 44px; max-width: 100%; object-fit: contain; }
.brand-logo-light { display: none; }
.site-header.is-scrolled .brand-logo-dark, .site-header.is-open .brand-logo-dark { display: none; }
.site-header.is-scrolled .brand-logo-light, .site-header.is-open .brand-logo-light { display: block; }
.footer-brand span { color: var(--focus); }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { position: relative; color: inherit; font-size: 12px; font-weight: 600; letter-spacing: .02em; text-decoration: none; }
.site-nav > a:not(.nav-cta)::after { position: absolute; bottom: -9px; left: 0; right: 100%; height: 2px; content: ""; background: var(--focus); transition: right var(--update); }
.site-nav > a:hover::after, .site-nav > a.is-active::after { right: 0; }
.nav-cta { min-height: 40px; display: inline-flex; align-items: center; gap: 8px; padding: 0 15px; border: 1px solid currentColor; border-radius: var(--radius-pill); }
.nav-dropdown, .nav-submenu { position: relative; }
.nav-dropdown-trigger, .nav-submenu-trigger { display: inline-flex; align-items: center; justify-content: space-between; gap: 9px; padding: 0; border: 0; background: transparent; color: inherit; font-size: 12px; font-weight: 600; letter-spacing: .02em; cursor: pointer; }
.nav-dropdown-trigger span, .nav-submenu-trigger span { color: var(--focus); font-size: 15px; transition: transform var(--update); }
.nav-dropdown.is-open > .nav-dropdown-trigger span { transform: rotate(45deg); }
.nav-dropdown-menu, .nav-submenu-menu { position: absolute; display: grid; padding: 8px; border: 1px solid rgb(var(--ink-rgb) / 14%); border-radius: var(--radius-md); background: rgb(var(--canvas-rgb) / 98%); color: var(--ink); box-shadow: 0 20px 45px rgb(var(--ink-rgb) / 16%); opacity: 0; visibility: hidden; transform: translateY(-6px); pointer-events: none; transition: opacity var(--update), transform var(--update), visibility var(--update); }
.nav-dropdown-menu { top: calc(100% + 18px); right: 0; width: 220px; }
.nav-submenu-menu { top: -8px; right: calc(100% + 9px); width: 190px; }
.nav-dropdown:hover > .nav-dropdown-menu, .nav-dropdown:focus-within > .nav-dropdown-menu, .nav-dropdown.is-open > .nav-dropdown-menu, .nav-submenu:hover > .nav-submenu-menu, .nav-submenu:focus-within > .nav-submenu-menu, .nav-submenu.is-open > .nav-submenu-menu { opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
.nav-menu-item, .nav-submenu-trigger { min-height: 42px; width: 100%; padding: 10px 11px; border-radius: 7px; }
.nav-menu-item { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav-menu-item span { color: var(--text-secondary); }
.nav-menu-item:hover, .nav-menu-item:focus-visible, .nav-submenu-trigger:hover, .nav-submenu-trigger:focus-visible { background: var(--surface-subtle); }
.nav-submenu-trigger span { transform: translateX(0); }
.nav-submenu:hover > .nav-submenu-trigger span, .nav-submenu:focus-within > .nav-submenu-trigger span, .nav-submenu.is-open > .nav-submenu-trigger span { transform: translateX(3px); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; color: inherit; cursor: pointer; }
.menu-toggle i { display: block; width: 100%; height: 2px; margin: 5px 0; background: currentColor; transition: transform var(--update); }

.hero { position: relative; min-height: 100svh; overflow: hidden; background: var(--ink); color: var(--text-inverse); }
.hero-media { position: absolute; inset: 0; }
.hero-media video { position: absolute; z-index: 1; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 45% center; opacity: 0; pointer-events: none; transform: translateX(3%) scaleX(-1.06); transform-origin: center; filter: brightness(1.12) saturate(.82) contrast(1.03); transition: opacity 480ms cubic-bezier(.22, 1, .36, 1); will-change: opacity; }
.hero-media video.hero-video-mirrored { transform: translateX(3%) scaleX(-1.06); }
.hero-media video::-webkit-media-controls, .hero-media video::-webkit-media-controls-enclosure { display: none !important; }
.hero-media video.is-active { opacity: .94; }
.hero-fallback { position: absolute; z-index: 0; inset: 0; overflow: hidden; background: linear-gradient(90deg, rgb(var(--hero-ink-rgb) / 38%), transparent 58%), url("../images/hoffman-banner-poster.jpg") 45% center / cover no-repeat, var(--hero-deep); }
.hero-scrim { position: absolute; z-index: 2; inset: 0; background: linear-gradient(90deg, rgb(var(--hero-ink-rgb) / 90%) 0%, rgb(var(--hero-ink-rgb) / 72%) 38%, rgb(var(--hero-ink-rgb) / 20%) 72%, rgb(var(--hero-ink-rgb) / 30%) 100%), linear-gradient(0deg, rgb(var(--hero-ink-rgb) / 70%) 0%, transparent 42%); }
.hero-copy { position: relative; z-index: 3; width: min(calc(700px + max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2))), 58vw); min-height: 100svh; display: flex; flex-direction: column; justify-content: center; padding: var(--header-height) 0 96px max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); }
.hero-brand-logo { width: min(100%, 430px); height: auto; aspect-ratio: 661.9 / 151.69; object-fit: contain; margin: 0; }
.eyebrow, .kicker { margin: 0; color: var(--focus); font-size: 12px; font-weight: 600; letter-spacing: .06em; }
.hero .eyebrow { margin-top: 18px; }
.hero h1 { max-width: 680px; margin: 8px 0 0; font-size: 44px; font-weight: 700; line-height: 1.08; letter-spacing: 0; }
.hero-deck { max-width: 590px; margin: 12px 0 0; color: var(--inverse-secondary); font-size: clamp(15px, 1.05vw, 18px); }
.hero-capabilities { width: min(650px, 100%); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 14px 0 0; padding: 10px 0; border-top: 1px solid rgb(var(--inverse-rgb) / 28%); border-bottom: 1px solid rgb(var(--inverse-rgb) / 18%); list-style: none; }
.hero-capabilities li { min-width: 0; display: flex; align-items: center; gap: 9px; padding: 0 13px; border-left: 1px solid rgb(var(--inverse-rgb) / 20%); color: var(--text-inverse); }
.hero-capabilities li:first-child { padding-left: 0; border-left: 0; }
.hero-capabilities svg { width: 22px; height: 22px; flex: 0 0 22px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.hero-capabilities span { min-width: 0; display: grid; gap: 2px; }
.hero-capabilities strong { color: var(--text-inverse); font-size: 11px; line-height: 1.1; letter-spacing: .015em; white-space: nowrap; }
.hero-capabilities small { color: rgb(var(--inverse-rgb) / 72%); font-size: 9px; font-weight: 600; line-height: 1.1; white-space: nowrap; }
.js .hero-capabilities li { opacity: 0; transform: translateY(8px); animation: capability-enter 520ms cubic-bezier(.22, 1, .36, 1) forwards; }
.js .hero-capabilities li:nth-child(2) { animation-delay: 70ms; }
.js .hero-capabilities li:nth-child(3) { animation-delay: 140ms; }
.js .hero-capabilities li:nth-child(4) { animation-delay: 210ms; }
@keyframes capability-enter { to { opacity: 1; transform: none; } }
.hero-capabilities li { transition: color var(--update), transform var(--update); }
.hero-capabilities li:hover { color: var(--focus); transform: translateY(-1px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.button { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 0 18px; border: 1px solid transparent; border-radius: var(--radius-pill); font-size: 12px; font-weight: 600; text-decoration: none; transition: transform var(--update), background var(--update), color var(--update); }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--focus); color: var(--ink); }
.button-primary:hover { background: var(--highlight); }
.button-quiet { border-color: var(--inverse-border); color: var(--text-inverse); }
.button-quiet:hover { background: var(--surface); color: var(--ink); }
.hero-authors { max-width: 650px; margin-top: 10px; color: var(--inverse-muted); font-size: 11px; line-height: 1.35; }
.hero-authors p { margin: 0 0 3px; color: var(--inverse-strong); font-size: 12px; }
.hero-authors > span { display: block; }
.author-link { color: inherit; text-decoration-color: rgb(var(--inverse-rgb) / 50%); text-underline-offset: 3px; transition: color var(--update), text-decoration-color var(--update); }
.author-link:hover, .author-link:focus-visible { color: var(--focus); text-decoration-color: currentColor; }
.hero-institution-logos { width: min(650px, 100%); height: 27px; display: flex; align-items: center; overflow-x: auto; margin-top: 7px; scrollbar-width: none; }
.hero-institution-logos[hidden] { display: none; }
.hero-institution-logos::-webkit-scrollbar { display: none; }
.logo-cell { display: flex; align-items: center; justify-content: center; }
.logo-link { border-radius: var(--radius-sm); text-decoration: none; transition: background var(--update), transform var(--update); }
.logo-link:hover, .logo-link:focus-visible { background: rgb(var(--inverse-rgb) / 13%); transform: translateY(-2px); }
.logo-link:hover img, .logo-link:focus-visible img { opacity: 1; }
.hero-institution-logos .logo-cell { flex: 0 0 auto; height: 100%; padding: 2px 9px; }
.hero-institution-logos .logo-cell + .logo-cell { border-left: 1px solid rgb(var(--inverse-rgb) / 24%); }
.hero-institution-logos img { width: auto; max-width: none; height: 21px; object-fit: contain; filter: grayscale(1) brightness(0) invert(1); opacity: .88; }
.hero-institution-logos img[alt="Shanghai Innovation Institute"] { height: 22px; }
.hero-institution-logos img[alt="Shanghai Jiao Tong University"] { height: 21px; }
.hero-institution-logos img[alt="HexLab"] { height: 22px; }
.hero-institution-logos img[alt="SFTR"] { height: 15.3px; }
.hero-system { position: absolute; z-index: 4; left: max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); right: max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); bottom: 24px; display: grid; grid-template-columns: auto minmax(340px, 1fr) auto; align-items: center; gap: 22px; padding: 10px 13px 10px 18px; border: 1px solid rgb(var(--inverse-rgb) / 22%); border-radius: var(--radius-pill); background: rgb(var(--connector-rgb) / 92%); }
.system-label, .system-meta { color: var(--inverse-secondary); font: 600 10px/1.2 var(--sans); letter-spacing: .03em; }
.system-track { display: grid; grid-template-columns: minmax(110px, 1fr) 36px minmax(76px, .65fr) 36px minmax(100px, 1fr); align-items: center; }
.system-track i { height: 1px; background: var(--inverse-quiet); }
.signal { position: relative; min-height: 30px; display: grid; place-items: center; padding: 5px 12px; border-radius: var(--radius-pill); color: var(--text-inverse); font-size: 11px; font-weight: 600; }
.signal-state { background: var(--state); }
.signal-core { border: 1px solid var(--focus); background: var(--surface); color: var(--ink); }
.signal-action { background: var(--action); }
.js .system-track .signal::after { position: absolute; width: 6px; height: 6px; border-radius: 50%; content: ""; background: var(--highlight); box-shadow: 0 0 0 3px rgb(var(--highlight-rgb) / 22%); opacity: 0; animation: signal-pulse 3.2s ease-in-out infinite; }
.js .system-track .signal:nth-of-type(2)::after { animation-delay: .55s; }
.js .system-track .signal:nth-of-type(3)::after { animation-delay: 1.1s; }
@keyframes signal-pulse { 0%, 26%, 100% { opacity: 0; transform: scale(.6); } 10%, 16% { opacity: 1; transform: scale(1); } }
.video-controls { position: absolute; z-index: 5; right: max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); top: calc(var(--header-height) + 20px); width: 220px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: hidden; border: 1px solid rgb(var(--inverse-rgb) / 38%); border-radius: var(--radius-pill); background: rgb(var(--connector-rgb) / 72%); }
.video-control { min-width: 0; min-height: 36px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 0 10px; border: 0; background: transparent; color: var(--text-inverse); font: 600 10px/1 var(--sans); letter-spacing: .03em; cursor: pointer; transition: background var(--update), color var(--update); }
.video-control + .video-control { border-left: 1px solid rgb(var(--inverse-rgb) / 28%); }
.video-control:hover { background: rgb(var(--inverse-rgb) / 12%); }
.video-control:focus-visible { position: relative; outline: 2px solid var(--focus); outline-offset: -3px; }
.video-control:disabled { cursor: default; opacity: .5; }
.video-switch-icon { font-size: 14px; line-height: 1; }
.hero.has-video-error .video-controls, .hero.has-video-error .video-speed-caption { display: none; }
.video-speed-caption { position: absolute; z-index: 5; right: max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); top: calc(var(--header-height) + 64px); margin: 0; color: var(--inverse-secondary); font-size: 10px; line-height: 1.4; letter-spacing: 0; text-align: right; }
@media (max-width: 1100px) { .video-speed-caption { right: 24px; } }
@media (max-width: 820px) { .video-speed-caption { top: calc(var(--header-height) + 56px); right: 20px; } }

.section-pad { padding: 112px max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); }
.section-rail { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 22px; margin-bottom: 76px; color: var(--text-secondary); font-size: 11px; font-weight: 600; letter-spacing: .04em; }
.section-rail i { height: 1px; background: var(--border); }
.kicker { margin-bottom: 16px; color: var(--warning); }
.premise { background: var(--surface); }
.premise-lead { display: grid; grid-template-columns: minmax(0, 1.22fr) minmax(350px, .78fr); gap: clamp(60px, 8vw, 126px); align-items: end; }
.premise h2, .method h2, .evidence h2, .figure-section h2, .people h2 { margin: 0; font-size: clamp(38px, 4.2vw, 60px); font-weight: 700; line-height: 1.02; letter-spacing: -.035em; }
.premise-copy { color: var(--text-secondary); font-size: 17px; }
.premise-copy p { margin: 0 0 18px; }
.gap-sequence { list-style: none; margin: 78px 0 0 13%; padding: 0; border-top: 1px solid var(--border); }
.gap-sequence li { display: grid; grid-template-columns: 54px minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--border); }
.gap-sequence > li > span { color: var(--warning); font: 600 13px/1 var(--sans); }
.gap-sequence h3 { margin: 0 0 4px; font-size: 24px; line-height: 1; }
.gap-sequence p { margin: 0; color: var(--text-secondary); }
.semantic-badge { min-width: 92px; padding: 8px 13px; border-radius: var(--radius-pill); color: var(--text-inverse); font-size: 11px; letter-spacing: .02em; text-align: center; }
.badge-state { background: var(--state); }
.badge-focus { background: var(--focus); color: var(--ink); }
.badge-neutral { background: var(--surface-strong); }
.paper-figure { overflow: hidden; margin: 58px 0 0; border: 1px solid var(--border); border-radius: var(--radius-lg); background: transparent; }
.paper-figure-overview { margin-left: 13%; }
.paper-figure-header { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 22px; background: var(--surface-strong); color: var(--text-inverse); }
.paper-figure-header p { margin: 0 0 4px; color: var(--focus); font: 700 10px/1 var(--sans); letter-spacing: .05em; text-transform: uppercase; }
.paper-figure-header h3 { margin: 0; font-size: clamp(18px, 2.1vw, 26px); line-height: 1.08; }
.paper-figure-header > span { flex: 0 0 auto; color: var(--inverse-strong); font-size: 10px; font-weight: 600; letter-spacing: .03em; text-align: right; }
.paper-figure-stage { overflow-x: auto; overscroll-behavior: contain; padding: clamp(12px, 2.1vw, 28px); background: transparent; scrollbar-color: var(--surface-strong) var(--surface-subtle); }
.paper-figure-stage img { display: block; width: 100%; height: auto; background: transparent; }
.paper-figure-overview .paper-figure-stage img { min-width: 900px; }
.paper-figure-method .paper-figure-stage img { min-width: 1000px; }
.paper-figure figcaption { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px 22px; padding: 14px 20px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 12px; line-height: 1.45; }
.paper-figure figcaption strong { color: var(--ink); }
.paper-figure-scroll-note { display: none; margin: 0; padding: 10px 16px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 10px; }

.method { background: var(--surface-subtle); }
.method-intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .42fr); gap: 60px; align-items: end; margin-bottom: 56px; }
.method-intro > p { margin: 0; color: var(--text-secondary); }
.method-figure-switcher { display: grid; grid-template-columns: minmax(190px, .23fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.method-figure-tabs { overflow: hidden; display: grid; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); }
.method-figure-tabs button { display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: 5px 10px; min-height: 92px; padding: 18px 16px; border: 0; border-bottom: 1px solid var(--border); background: transparent; color: var(--text-secondary); text-align: left; cursor: pointer; transition: color var(--update), background var(--update), box-shadow var(--update); }
.method-figure-tabs button:last-child { border-bottom: 0; }
.method-figure-tabs button > span { grid-row: 1 / 3; color: var(--warning); font: 700 11px/1 var(--sans); }
.method-figure-tabs b { color: var(--ink); font-size: 19px; line-height: 1; }
.method-figure-tabs small { font-size: 10px; line-height: 1.3; }
.method-figure-tabs button:hover { background: var(--surface-subtle); }
.method-figure-tabs button[aria-selected="true"] { background: var(--surface-strong); color: var(--inverse-strong); box-shadow: inset 4px 0 var(--focus); }
.method-figure-tabs button[aria-selected="true"] b { color: var(--text-inverse); }
.method-figure-tabs button:focus-visible { position: relative; z-index: 1; outline: 3px solid var(--focus); outline-offset: -3px; }
.method-figure-panels { min-width: 0; }
.paper-figure-method { margin: 0; }
.paper-figure-method[hidden] { display: none; }
.paper-figure-method.is-switching { animation: method-figure-update var(--update); }
@keyframes method-figure-update { from { opacity: .58; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.figure-panel { overflow: hidden; border-radius: var(--radius-lg); background: var(--surface); }
.method-notes { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 42px; border-top: 1px solid var(--border); }
.method-notes > div { padding: 24px 24px 8px; border-right: 1px solid var(--border); }
.method-notes > div:last-child { border-right: 0; }
.method-notes span { color: var(--warning); font: 600 11px/1 var(--sans); }
.method-notes h3 { margin: 10px 0 8px; font-size: 18px; line-height: 1.15; }
.method-notes p { margin: 0; color: var(--text-secondary); font-size: 12px; }
.method-notes .pending-note { background: repeating-linear-gradient(135deg, transparent 0 10px, rgb(var(--border-rgb) / 18%) 10px 11px); }
.results-summary { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 40px; margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--border); }
.results-summary h3 { margin: 0; font-size: 28px; line-height: 1.15; letter-spacing: 0; }
.results-copy { color: var(--text-secondary); font-size: 15px; }
.results-copy p { margin: 0 0 16px; }
@media (max-width: 760px) { .results-summary { grid-template-columns: 1fr; gap: 20px; } }
.method-notes .pending-note span { color: var(--action); }

.evidence { padding-bottom: 112px; background: var(--ink); color: var(--text-inverse); }
.evidence-intro { padding-bottom: 74px; }
.rail-dark { color: var(--inverse-muted); }
.rail-dark i { background: var(--surface-strong); }
.evidence h2 { max-width: 980px; }
.evidence-intro > p:last-child { max-width: 730px; margin: 24px 0 0; color: var(--inverse-secondary); }
.media-story { width: var(--page); display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: clamp(42px, 7vw, 110px); align-items: center; margin: 0 auto 100px; }
.media-story-reverse { grid-template-columns: minmax(300px, .65fr) minmax(0, 1.35fr); }
.media-story-reverse .media-frame { order: 2; }
.media-frame { position: relative; overflow: hidden; border-radius: var(--radius-md); background: var(--hero-deep); box-shadow: 0 28px 70px rgb(var(--hero-ink-rgb) / 32%); }
.media-frame::before { position: absolute; z-index: 2; inset: 0 auto 0 0; width: 5px; content: ""; background: var(--focus); pointer-events: none; }
.media-story-reverse .media-frame::before { background: var(--state-soft); }
.media-frame video { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--hero-deep); }
.media-frame-wide video { aspect-ratio: 2 / 1; }
.media-frame-mujoco video { aspect-ratio: 320 / 173; }
.media-fallback { display: none; position: absolute; inset: 50% auto auto 50%; width: max-content; max-width: 80%; margin: 0; padding: 8px 12px; border-radius: var(--radius-pill); background: var(--surface-strong); color: var(--text-inverse); font-size: 10px; transform: translate(-50%, -50%); }
.media-frame.has-video-error { min-height: 300px; background: radial-gradient(circle at 70% 35%, var(--surface-strong), var(--hero-deep) 65%); }
.media-frame.has-video-error .media-fallback { display: block; }
.media-copy > span { color: var(--focus); font: 600 11px/1 var(--sans); letter-spacing: .04em; }
.media-story-reverse .media-copy > span { color: var(--state-readable); }
.media-copy h3 { margin: 14px 0 18px; font-size: clamp(32px, 3vw, 46px); line-height: 1.02; letter-spacing: -.03em; }
.media-copy p { margin: 0; color: var(--inverse-secondary); }

.semantic-comparison { background: var(--surface); }
.comparison-heading { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(340px, .55fr); gap: clamp(48px, 8vw, 120px); align-items: end; margin-bottom: 48px; }
.semantic-comparison h2 { max-width: 820px; margin: 0; font-size: clamp(38px, 4.2vw, 60px); font-weight: 700; line-height: 1.02; letter-spacing: 0; }
.comparison-copy > p { margin: 0; color: var(--text-secondary); }
.comparison-controls { display: flex; gap: 8px; margin-top: 22px; }
.comparison-control { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 0 16px; border: 1px solid var(--border); border-radius: var(--radius-pill); background: var(--surface); color: var(--ink); font-size: 12px; font-weight: 700; cursor: pointer; transition: transform var(--update), background var(--update), border-color var(--update); }
.comparison-control:hover { border-color: var(--connector); transform: translateY(-1px); }
.comparison-control-primary { border-color: var(--focus); background: var(--focus); }
.comparison-control-primary:hover { border-color: var(--highlight); background: var(--highlight); }
.comparison-matrix { display: grid; gap: 24px; }
.interpolation-row { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface-subtle); }
.interpolation-row-header { min-height: 58px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px; padding: 12px 18px; border-radius: var(--radius-md) var(--radius-md) 0 0; background: var(--surface-strong); color: var(--text-inverse); }
.interpolation-row-header span { color: var(--focus); font: 700 11px/1 var(--sans); letter-spacing: 0; }
.interpolation-row-header h3 { margin: 0; font-size: 20px; line-height: 1.1; }
.interpolation-row-header small { color: var(--inverse-strong); font-size: 10px; font-weight: 600; letter-spacing: 0; }
.interpolation-row-run .interpolation-row-header span { color: var(--state-readable); }
.interpolation-strip { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; background: var(--border); }
.interpolation-step { position: relative; min-width: 0; margin: 0; background: var(--surface); }
.interpolation-step video { width: 100%; aspect-ratio: 1; object-fit: cover; background: var(--surface-subtle); }
.interpolation-step figcaption { min-height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 11px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 10px; }
.interpolation-step figcaption strong { color: var(--ink); font-size: 12px; }
.interpolation-step.has-video-error video { visibility: hidden; }
.interpolation-step.has-video-error::before { position: absolute; z-index: 1; inset: 0 0 44px; display: grid; place-items: center; content: "Video unavailable"; background: var(--surface-subtle); color: var(--text-secondary); font-size: 11px; }

.figure-section { background: var(--canvas); }
.figure-heading { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .5fr); gap: 60px; align-items: end; margin-bottom: 52px; }
.figure-heading .kicker { grid-column: 1 / -1; margin-bottom: -34px; }
.figure-heading > p:last-child { margin: 0; color: var(--text-secondary); }
.figure-panel { margin: 0; border: 1px solid var(--border); }
.figure-scroll { display: block; overflow-x: auto; padding: 28px; background: var(--surface); }
.figure-scroll img { width: 100%; min-width: 800px; }
.figure-note { margin: 0; padding: 13px 20px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: 11px; }

/* Paper artifacts that are not yet available retain the approved panel/media frames. */
.figure-placeholder { margin-top: 28px; }
.placeholder-stage { min-height: 250px; display: grid; place-items: center; align-content: center; gap: 7px; background: repeating-linear-gradient(135deg, var(--surface) 0 16px, var(--surface-subtle) 16px 17px); color: var(--text-secondary); text-align: center; }
.placeholder-stage strong { color: var(--ink); font-size: 19px; }
.placeholder-stage span { font-size: 13px; }
.placeholder-frame { aspect-ratio: 16 / 9; display: grid; place-items: center; padding: 28px; background: repeating-linear-gradient(135deg, var(--hero-deep) 0 18px, var(--surface-strong) 18px 19px); color: var(--text-inverse); text-align: center; }
.placeholder-frame strong, .placeholder-frame span { display: block; }
.placeholder-frame strong { font-size: 19px; }
.placeholder-frame span { margin-top: 5px; color: var(--inverse-secondary); font-size: 12px; }
.result-placeholders { min-height: 310px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.result-placeholders > div { min-height: 220px; display: grid; place-items: center; align-content: center; gap: 5px; padding: 20px; border: 1px dashed var(--border); border-radius: var(--radius-md); background: repeating-linear-gradient(135deg, var(--surface) 0 16px, var(--surface-subtle) 16px 17px); text-align: center; }
.result-placeholders strong { font-size: 16px; }
.result-placeholders span { color: var(--text-secondary); font-size: 12px; }

.people { background: var(--surface); }
.people-grid { display: grid; grid-template-columns: minmax(300px, .55fr) minmax(0, 1.45fr); gap: 80px; align-items: end; }
.people-copy { min-width: 0; color: var(--text-secondary); }
.author-list { color: var(--ink); font-weight: 700; line-height: 1.9; }
.logo-strip { width: max-content; display: flex; align-items: stretch; overflow-x: auto; margin-top: 30px; scrollbar-color: var(--surface-strong) var(--surface-subtle); }
.logo-strip .logo-cell { flex: 0 0 auto; min-height: 46px; padding: 8px 12px; }
.logo-strip .logo-cell + .logo-cell { border-left: 1px solid var(--border); }
.logo-strip img { width: auto; max-width: none; height: 30px; object-fit: contain; filter: grayscale(1) brightness(0); opacity: .66; }
.logo-strip img[alt="Shanghai Innovation Institute"] { height: 31px; transform: translateY(1px); }
.logo-strip img[alt="Shanghai Jiao Tong University"] { height: 30px; }
.logo-strip img[alt="HexLab"] { height: 31px; }
.logo-strip img[alt="SFTR"] { height: 20.7px; }
.logo-strip .logo-link:hover, .logo-strip .logo-link:focus-visible { background: var(--surface-subtle); }
.resource-list { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 74px; border-top: 1px solid var(--border); }
.resource-item { min-height: 145px; display: grid; grid-template-rows: auto 1fr auto; gap: 8px; padding: 23px 20px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); text-decoration: none; }
.resource-item:last-child { border-right: 0; }
.resource-item span { font-size: 21px; font-weight: 700; }
.resource-item small { color: var(--text-secondary); }
.resource-item b { align-self: end; color: var(--warning); font: 600 11px/1 var(--sans); letter-spacing: .03em; }
.resource-item[href] { transition: background var(--update); }
.resource-item[href]:hover { background: var(--surface-subtle); }

.site-footer { min-height: 176px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 50px; padding: 38px max(32px, calc((100vw - min(1420px, 100vw - 64px)) / 2)); background: var(--surface-strong); color: var(--text-inverse); }
.footer-brand { font-size: 26px; font-weight: 700; letter-spacing: -.03em; text-decoration: none; }
.site-footer p { max-width: 520px; margin: 0; color: var(--inverse-strong); font-size: 11px; }
.site-footer p:last-child { text-align: right; }

.js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity var(--enter), transform var(--enter); }
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  :root { --page: calc(100vw - 48px); }
  .site-header, .hero-copy, .section-pad, .site-footer { padding-left: 24px; padding-right: 24px; }
  .site-nav { gap: 18px; }
  .hero-system { left: 24px; right: 24px; }
  .video-controls { right: 24px; }
  .hero-copy { width: min(700px, 68vw); }
  .method-notes { grid-template-columns: repeat(2, 1fr); }
  .method-notes > div:nth-child(2) { border-right: 0; }
  .method-notes > div { padding-bottom: 24px; border-bottom: 1px solid var(--border); }
}

@media (max-width: 820px) {
  :root { --header-height: 68px; }
  .site-header { padding: 0 20px; }
  .brand-logo { height: 41.6px; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; top: var(--header-height); left: 0; right: 0; display: none; padding: 12px 20px 22px; background: var(--canvas); color: var(--ink); box-shadow: 0 1px 0 rgb(var(--ink-rgb) / 16%); }
  .site-header.is-open .site-nav { display: grid; gap: 0; }
  .site-nav a { padding: 15px 0; border-bottom: 1px solid var(--border); }
  .site-nav a::after { display: none; }
  .nav-dropdown { width: 100%; }
  .nav-dropdown-trigger { width: 100%; min-height: 52px; padding: 15px 0; border-bottom: 1px solid var(--border); }
  .nav-dropdown-menu, .nav-submenu-menu { position: static; width: 100%; display: none; padding: 4px 0 4px 14px; border: 0; border-radius: 0; background: transparent; box-shadow: none; opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
  .nav-dropdown.is-open > .nav-dropdown-menu, .nav-submenu.is-open > .nav-submenu-menu { display: grid; }
  .site-nav .nav-menu-item, .site-nav .nav-submenu-trigger { min-height: 44px; padding: 11px 10px; border-bottom: 0; }
  .nav-submenu-trigger span { transform: rotate(90deg); }
  .nav-submenu.is-open > .nav-submenu-trigger span { transform: rotate(90deg) translateX(3px); }
  .nav-cta { min-height: 46px; margin-top: 10px; justify-content: center; border-radius: var(--radius-pill); }
  .site-header.is-open .menu-toggle i:first-of-type { transform: translateY(3.5px) rotate(45deg); }
  .site-header.is-open .menu-toggle i:last-of-type { transform: translateY(-3.5px) rotate(-45deg); }

  .hero-media video { object-position: 45% center; }
  .hero-scrim { background: linear-gradient(90deg, rgb(var(--hero-ink-rgb) / 90%) 0%, rgb(var(--hero-ink-rgb) / 74%) 58%, rgb(var(--hero-ink-rgb) / 32%) 100%), linear-gradient(0deg, rgb(var(--hero-ink-rgb) / 76%) 0%, transparent 52%); }
  .hero-copy { width: 88vw; padding: calc(var(--header-height) + 16px) 20px 126px; justify-content: center; }
  .hero-brand-logo { width: min(58vw, 300px); }
  .hero h1 { font-size: 40px; }
  .hero-deck { max-width: 580px; }
  .hero-capabilities { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 0; }
  .hero-capabilities li { min-height: 43px; padding: 7px 12px; }
  .hero-capabilities li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .hero-capabilities li:nth-child(n + 3) { border-top: 1px solid rgb(var(--inverse-rgb) / 18%); }
  .hero-authors { max-width: 90%; }
  .hero-institution-logos { gap: 0; }
  .logo-strip { width: 100%; }
  .hero-system { left: 20px; right: 20px; bottom: 22px; grid-template-columns: 1fr; gap: 9px; border-radius: var(--radius-md); }
  .system-label, .system-meta { text-align: center; }
  .video-controls { top: calc(var(--header-height) + 12px); right: 20px; width: 210px; }

  .section-pad { padding: 88px 24px; }
  .section-rail { margin-bottom: 54px; }
  .premise-lead, .method-intro, .comparison-heading, .figure-heading, .people-grid { grid-template-columns: 1fr; gap: 34px; }
  .premise h2, .method h2, .evidence h2, .semantic-comparison h2, .figure-section h2, .people h2 { font-size: clamp(36px, 7.5vw, 50px); }
  .gap-sequence { margin-left: 0; }
  .paper-figure-overview { margin-left: 0; }
  .paper-figure-header { align-items: flex-start; flex-direction: column; gap: 8px; }
  .paper-figure-header > span { text-align: left; }
  .paper-figure-scroll-note { display: block; }
  .method-intro { margin-bottom: 42px; }
  .method-figure-switcher { grid-template-columns: 1fr; gap: 14px; }
  .method-figure-tabs { grid-template-columns: repeat(3, minmax(170px, 1fr)); overflow-x: auto; border-radius: var(--radius-md); scrollbar-color: var(--surface-strong) var(--surface-subtle); }
  .method-figure-tabs button { min-height: 78px; border-right: 1px solid var(--border); border-bottom: 0; }
  .method-figure-tabs button:last-child { border-right: 0; }
  .method-figure-tabs button[aria-selected="true"] { box-shadow: inset 0 -4px var(--focus); }
  .media-story, .media-story-reverse { grid-template-columns: 1fr; gap: 34px; margin-bottom: 78px; }
  .media-story-reverse .media-frame { order: 0; }
  .media-copy { max-width: 620px; }
  .comparison-matrix { overflow-x: auto; padding-bottom: 8px; scrollbar-color: var(--surface-strong) var(--surface-subtle); }
  .interpolation-row { min-width: 760px; }
  .figure-heading .kicker { grid-column: auto; margin-bottom: -12px; }
  .resource-list { grid-template-columns: repeat(2, 1fr); }
  .resource-item:nth-child(2) { border-right: 0; }
  .site-footer { grid-template-columns: 1fr; gap: 12px; padding: 42px 24px; }
  .site-footer p:last-child { text-align: left; }
  .result-placeholders { grid-template-columns: 1fr; }
  .result-placeholders > div { min-height: 140px; }
}

@media (max-width: 520px) {
  .hero-copy { width: 100%; padding-left: 18px; padding-right: 18px; }
  .hero-brand-logo { width: min(70vw, 260px); }
  .hero h1 { font-size: 32px; }
  .hero-deck { font-size: 15px; }
  .hero-capabilities { margin-top: 13px; }
  .hero-capabilities li { gap: 8px; }
  .hero-capabilities svg { width: 20px; height: 20px; flex-basis: 20px; }
  .hero-actions { align-items: stretch; flex-direction: row; width: 100%; }
  .hero-actions .button { flex: 1 1 0; width: auto; padding-inline: 10px; font-size: 10.5px; }
  .hero-actions .button-paper { flex: 0 0 auto; }
  .hero-authors { font-size: 9px; }
  .hero-authors p { font-size: 10px; }
  .hero-institution-logos { height: 16px; margin-top: 6px; overflow-x: visible; }
  .hero-institution-logos .logo-cell { padding-inline: 2px; }
  .hero-institution-logos img { height: 12px; }
  .hero-institution-logos img[alt="Shanghai Innovation Institute"] { height: 15px; transform: none; }
  .hero-institution-logos img[alt="Shanghai Jiao Tong University"] { height: 12px; }
  .hero-institution-logos img[alt="HexLab"] { height: 12px; }
  .hero-institution-logos img[alt="SFTR"] { height: 9px; }
  .hero-system { left: 18px; right: 18px; }
  .system-track { grid-template-columns: 1fr 18px .6fr 18px 1fr; }
  .signal { padding-inline: 7px; font-size: 8px; }
  .system-meta { display: none; }
  .section-rail { grid-template-columns: auto 1fr; }
  .section-rail span:last-child { display: none; }
  .section-pad { padding: 72px 18px; }
  .premise h2, .method h2, .evidence h2, .semantic-comparison h2, .figure-section h2, .people h2 { font-size: 36px; }
  .premise-copy { font-size: 15px; }
  .gap-sequence li { grid-template-columns: 38px 1fr; gap: 14px; }
  .semantic-badge { grid-column: 2; justify-self: start; }
  .paper-figure { margin-top: 40px; }
  .paper-figure-method { margin-top: 0; }
  .paper-figure-header { padding: 14px 16px; }
  .paper-figure-header h3 { font-size: 18px; }
  .paper-figure-stage { padding: 10px; }
  .paper-figure figcaption { grid-template-columns: 1fr; gap: 4px; padding: 12px 16px; }
  .method-figure-tabs { grid-template-columns: repeat(3, minmax(150px, 1fr)); }
  .method-figure-tabs button { padding: 14px 12px; }
  .method-notes { grid-template-columns: 1fr; }
  .method-notes > div { border-right: 0; }
  .evidence { padding-bottom: 72px; }
  .evidence-intro { padding-bottom: 54px; }
  .media-story { width: calc(100vw - 36px); }
  .media-copy h3 { font-size: 32px; }
  .media-frame.has-video-error { min-height: 220px; }
  .comparison-controls { align-items: stretch; }
  .comparison-control { flex: 1 1 0; }
  .interpolation-row { min-width: 720px; }
  .figure-scroll { padding: 18px; }
  .resource-list { grid-template-columns: 1fr; }
  .resource-item { min-height: 126px; border-right: 0; }
}

@supports (height: 100dvh) {
  .hero, .hero-copy { min-height: 100dvh; }
}

@media (max-height: 760px) {
  .hero-copy { padding-top: calc(var(--header-height) + 6px); padding-bottom: 82px; }
  .hero .eyebrow { margin-top: 18px; }
  .hero h1 { margin-top: 8px; }
  .hero-deck { margin-top: 12px; }
  .hero-capabilities { margin-top: 12px; }
  .hero-actions { margin-top: 14px; }
  .hero-authors { margin-top: 12px; }
  .hero-institution-logos { margin-top: 5px; }
}

@media (min-width: 821px) and (max-height: 760px) {
  .hero-copy { padding-top: var(--header-height); padding-bottom: 76px; }
  .hero-brand-logo { margin-bottom: 0; }
  .hero .eyebrow, .hero h1, .hero-deck, .hero-capabilities { margin-top: 0; }
  .hero .eyebrow { margin-top: 14px; }
  .hero-actions { margin-top: 16px; }
  .hero-authors { margin-top: 8px; }
  .hero-institution-logos { height: 20px; margin-top: 4px; }
  .hero-institution-logos img { height: 16px; }
  .hero-institution-logos img[alt="Shanghai Innovation Institute"] { height: 18px; }
  .hero-institution-logos img[alt="Shanghai Jiao Tong University"] { height: 16px; }
  .hero-institution-logos img[alt="HexLab"] { height: 17px; }
  .hero-institution-logos img[alt="SFTR"] { height: 11.7px; }
}

@media (max-width: 820px) and (max-height: 760px) {
  .hero-copy { padding-bottom: 116px; }
}

@media (max-width: 520px) and (max-height: 760px) {
  .hero-copy { padding-bottom: 77px; }
  .hero-actions { flex-direction: row; width: 100%; }
  .hero-actions .button { flex: 1 1 0; width: auto; padding-inline: 10px; }
  .hero-system { bottom: 14px; gap: 5px; padding-block: 7px; }
}

@media (max-width: 820px) {
  .hero-copy { padding-top: calc(var(--header-height) + 82px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}