:root {
  --ink: #10272c;
  --ink-soft: #50666a;
  --muted: #718481;
  --canvas: #f3f7f6;
  --teal-950: #063b3a;
  --teal-900: #084b49;
  --teal-700: #19716d;
  --teal-100: #d9efec;
  --line: #dfe8e6;
  --motion-ease: cubic-bezier(.22, 1, .36, 1);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; min-width: 280px; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
button, h1, h2, h3, p { margin: 0; }
button { color: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 3px solid var(--teal-700); outline-offset: 5px; }
.page-width { width: min(1400px, calc(100% - 112px)); margin-inline: auto; }
.skip-link { position: fixed; top: 16px; left: 24px; z-index: 20; padding: 16px; color: white; background: var(--teal-950); border-radius: 8px; white-space: nowrap; transform: translateY(calc(-100% - 32px)); }
.skip-link:focus { transform: translateY(0); }
.site-header { height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 32px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { display: grid; place-items: center; width: 45px; height: 45px; border-radius: 15px; color: white; background: var(--teal-900); }
.brand-mark svg { width: 30px; height: 30px; }
.brand-wordmark { font-size: 25px; font-weight: 650; letter-spacing: .12em; line-height: 1.1; }
.brand-wordmark > span { display: block; margin-top: 7px; font-size: 9px; font-weight: 400; letter-spacing: .24em; color: var(--muted); }
.header-nav { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.header-nav a, .header-nav button { position: relative; border: 0; padding: 12px 0; background: transparent; color: var(--ink-soft); font-size: 13px; }
.header-nav .nav-current { color: var(--teal-900); }
.nav-current::after { position: absolute; bottom: 3px; left: 50%; width: 4px; height: 4px; border-radius: 50%; background: var(--teal-700); content: ""; }
.header-nav a:hover, .header-nav button:hover { color: var(--teal-700); }
.workspace-link { display: inline-flex; align-items: center; justify-content: center; gap: 27px; min-height: 43px; padding: 0 19px; border: 1px solid #cbd9d5; border-radius: 99px; font-size: 12px; transition: background .2s, color .2s; }
.workspace-link:hover { background: var(--teal-900); color: white; }
.workspace-link > span { font-size: 19px; }
.hero { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; padding: 57px 0 47px; }
.eyebrow { color: var(--teal-700); font-size: 11px; font-weight: 500; letter-spacing: .13em; }
.hero .eyebrow { display: flex; align-items: center; gap: 8px; margin-bottom: 20px; }
.eyebrow > span { width: 5px; height: 5px; background: var(--teal-700); border-radius: 50%; }
h1 { font-size: clamp(36px, 4vw, 58px); font-weight: 450; letter-spacing: -.04em; line-height: 1.35; }
h1 .title-phrase { white-space: nowrap; }
h1 em { color: var(--teal-700); font-family: "Songti SC", "STSong", "SimSun", serif; font-weight: 400; font-style: normal; letter-spacing: -.04em; }
.hero-note { margin: 0 4px 6px 0; min-width: 225px; }
.discipline { display: flex; align-items: center; gap: 12px; color: var(--teal-900); font-size: 11px; }
.discipline i { color: #89a6a0; font-size: 14px; font-style: normal; }
.hero-note p { margin-top: 14px; color: var(--ink-soft); font-size: 13px; line-height: 1.9; }
.hero-note a { display: inline-flex; align-items: center; gap: 39px; margin-top: 22px; font-size: 11px; }
.hero-note a span { font-size: 19px; }
.gallery-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 17px; }
.gallery-heading > p { color: var(--ink-soft); font-size: 11px; }
.interaction-hint { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 10px; }
.interaction-hint svg { width: 12px; height: 12px; }
.touch-hint { display: none; }
.accordion-gallery { display: flex; height: 460px; gap: 10px; --gallery-duration: .6s; --gallery-closed-grow: .24; --gallery-active-grow: .52; }
.gallery-card { position: relative; flex: var(--gallery-closed-grow) 1 0%; min-width: 0; overflow: hidden; isolation: isolate; border-radius: 16px; color: white; background: var(--teal-950); transition: flex-grow var(--gallery-duration) var(--motion-ease); }
.gallery-card.is-active { flex-grow: var(--gallery-active-grow); }
.gallery-image-wrap, .gallery-overlay, .gallery-trigger { position: absolute; inset: 0; width: 100%; height: 100%; }
.gallery-image-wrap { z-index: -3; overflow: hidden; pointer-events: none; }
.gallery-image { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) brightness(.8); transform: perspective(1400px) scale(1.13); transition: filter var(--gallery-duration) ease, transform .7s var(--motion-ease); }
.gallery-card:nth-child(1) .gallery-image { object-position: 48% 50%; }
.gallery-card:nth-child(2) .gallery-image { object-position: 51% 50%; }
.gallery-card:nth-child(3) .gallery-image { object-position: 47% 52%; }
.gallery-card.is-active .gallery-image { filter: grayscale(0) brightness(.9); }
.gallery-overlay { z-index: -2; pointer-events: none; background: linear-gradient(180deg, rgba(6, 38, 36, .17) 0%, rgba(6, 38, 36, .08) 22%, rgba(5, 32, 31, .48) 57%, rgba(3, 31, 30, .93) 100%); }
.gallery-trigger { z-index: 1; border: 0; border-radius: inherit; background: transparent; }
.gallery-trigger:focus-visible { outline: 2px solid white; outline-offset: -7px; box-shadow: inset 0 0 0 4px var(--teal-700); }
.card-top { position: absolute; top: 23px; left: 24px; right: 24px; display: flex; align-items: center; justify-content: space-between; gap: 8px; pointer-events: none; }
.card-category { font-size: 10px; letter-spacing: .08em; color: rgba(255, 255, 255, .94); }
.card-arrow { display: grid; place-items: center; width: 32px; height: 32px; flex: none; border: 1px solid rgba(255, 255, 255, .55); border-radius: 50%; font-size: 19px; transition: transform var(--gallery-duration) var(--motion-ease), background .25s; }
.gallery-card.is-active .card-arrow { transform: rotate(45deg); background: rgba(255,255,255,.12); }
.card-bottom { position: absolute; z-index: 2; bottom: 55px; left: 28px; right: 28px; pointer-events: none; transition: bottom var(--gallery-duration) var(--motion-ease); }
.card-kicker { margin-bottom: 12px; white-space: nowrap; color: #deeeea; font-size: 11px; letter-spacing: .06em; opacity: 0; transition: opacity .22s; }
.card-bottom h2 { white-space: nowrap; font-size: clamp(21px, 2vw, 28px); font-weight: 450; line-height: 1.35; letter-spacing: -.035em; transition: font-size var(--gallery-duration) var(--motion-ease); }
.gallery-card.is-active .card-bottom { bottom: 31px; }
.gallery-card.is-active h2 { font-size: clamp(28px, 3vw, 41px); }
.gallery-card.is-active .card-kicker { opacity: 1; transition-delay: .16s; }
.card-detail { max-height: 0; visibility: hidden; opacity: 0; transform: translateY(9px); transition: max-height var(--gallery-duration) var(--motion-ease), opacity .23s, transform var(--gallery-duration) var(--motion-ease), visibility 0s .23s; }
.card-detail > p { margin-top: 16px; color: #e3efec; font-size: 12px; line-height: 1.85; white-space: nowrap; }
.gallery-card.is-active .card-detail { max-height: 180px; visibility: visible; opacity: 1; transform: translateY(0); transition: max-height var(--gallery-duration) var(--motion-ease), opacity .35s .15s, transform var(--gallery-duration) var(--motion-ease), visibility 0s; }
.card-actions { display: flex; align-items: center; gap: 10px; margin-top: 22px; }
.card-action { display: inline-flex; align-items: center; justify-content: space-between; gap: 29px; flex-shrink: 0; min-height: 43px; padding: 0 17px; border: 1px solid transparent; border-radius: 99px; background: #f4faf7; color: var(--teal-950); font-size: 11px; line-height: 1.4; pointer-events: auto; white-space: nowrap; transition: background .2s; }
.card-action span { font-size: 18px; }
.card-action:hover { background: #d9efec; }
.card-action:focus-visible { outline-color: white; }
.card-action-secondary { background: transparent; color: white; border-color: rgba(255,255,255,.5); }
.card-action-secondary:hover { background: rgba(255,255,255,.17); }
.collapsed-note { position: absolute; bottom: 29px; left: 28px; pointer-events: none; white-space: nowrap; color: #e3efec; font-size: 10px; opacity: .8; transition: opacity .2s; }
.gallery-card.is-active .collapsed-note { opacity: 0; }
.sound-signature { position: absolute; top: 110px; left: 36px; right: 36px; height: 74px; display: flex; align-items: center; justify-content: center; gap: 6px; opacity: 0; pointer-events: none; transition: opacity .6s .12s; }
.gallery-card.is-active .sound-signature { opacity: .45; }
.sound-signature span { width: 1px; height: 10px; background: #fff; }
.sound-signature span:nth-child(3n) { height: 32px; }
.sound-signature span:nth-child(4n) { height: 51px; }
.sound-signature span:nth-child(5n) { height: 73px; }
.sound-signature span:nth-child(7n) { height: 24px; }
.gallery-footer { min-height: 53px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 10px; color: var(--muted); }
.gallery-position { display: flex; align-items: center; gap: 11px; color: var(--ink-soft); }
.position-mark { display: flex; align-items: center; gap: 4px; }
.position-mark i { width: 5px; height: 5px; border-radius: 8px; background: #cad9d4; transition: width .4s var(--motion-ease), background .4s; }
.position-mark i.active { width: 20px; background: var(--teal-700); }
.collaboration-note { display: flex; gap: 21px; align-items: center; margin-top: 23px; padding: 27px 0 36px; border-top: 1px solid var(--line); }
.note-symbol { display: grid; place-items: center; width: 53px; height: 53px; flex-shrink: 0; color: var(--teal-700); }
.note-symbol svg { width: 48px; height: 48px; stroke-width: 1; }
.collaboration-note h2 { font-size: 14px; font-weight: 500; }
.collaboration-note p { margin-top: 8px; font-size: 11px; line-height: 1.8; color: var(--muted); }
.preview-label { margin-left: auto; flex-shrink: 0; color: var(--muted); font-size: 10px; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding: 23px 0 28px; border-top: 1px solid var(--line); font-size: 9px; color: var(--muted); letter-spacing: .025em; }
.workspace-dialog { width: min(590px, calc(100vw - 32px)); max-height: calc(100dvh - 48px); padding: 33px; border: 1px solid var(--line); border-radius: 22px; color: var(--ink); background: var(--canvas); box-shadow: 0 35px 100px rgba(5,42,39,.2); }
.workspace-dialog::backdrop { background: rgba(7, 34, 32, .43); backdrop-filter: blur(8px); }
.dialog-heading { display: flex; justify-content: space-between; align-items: center; }
.dialog-close { display: grid; place-items: center; width: 36px; height: 36px; flex-shrink: 0; padding: 0 0 2px; border: 1px solid var(--line); border-radius: 50%; background: white; font-size: 24px; line-height: 1; }
.dialog-state { display: inline-block; margin-top: 22px; padding: 5px 9px; color: var(--teal-700); background: var(--teal-100); border-radius: 5px; font-size: 10px; }
.workspace-dialog h2 { margin-top: 15px; font-size: 24px; font-weight: 500; letter-spacing: -.04em; line-height: 1.5; }
.dialog-intro { margin-top: 12px; font-size: 13px; line-height: 1.9; color: var(--ink-soft); }
.research-flow { margin-top: 25px; }
.research-flow article { padding: 15px 0; border-top: 1px solid var(--line); }
.research-flow h3 { font-size: 13px; font-weight: 550; }
.research-flow p { margin-top: 7px; font-size: 12px; line-height: 1.8; color: var(--ink-soft); }
.dialog-note { margin-top: 12px; font-size: 11px; line-height: 1.9; color: var(--muted); }
.dialog-action { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 43px; margin-top: 21px; padding: 0 17px; border-radius: 99px; background: var(--teal-900); color: white; font-size: 12px; }
.tool-list { margin-top: 24px; }
.tool-list details { border-top: 1px solid var(--line); }
.tool-list details:last-child { border-bottom: 1px solid var(--line); }
.tool-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; cursor: pointer; list-style: none; }
.tool-list summary::-webkit-details-marker { display: none; }
.tool-list b { display: block; font-size: 14px; font-weight: 500; }
.tool-list small { display: block; margin-top: 7px; color: var(--muted); font-size: 11px; }
.tool-list i { font-style: normal; font-size: 22px; color: var(--teal-700); transition: transform .2s; }
.tool-list details[open] i { transform: rotate(45deg); }
.tool-list details > p { padding: 0 25px 18px 0; font-size: 12px; line-height: 1.9; color: var(--ink-soft); }
.gallery-ready .gallery-card { animation: card-reveal .7s both var(--motion-ease); }
.gallery-ready .gallery-card:nth-child(2) { animation-delay: .06s; }
.gallery-ready .gallery-card:nth-child(3) { animation-delay: .12s; }
@keyframes card-reveal { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@media (min-width: 1650px) { .hero { padding-top: 65px; padding-bottom: 57px; } }
@media (max-width: 1100px) {
  .page-width { width: calc(100% - 64px); }
  .header-nav { gap: 23px; }
  .card-top { left: 20px; right: 20px; }
  .card-bottom { left: 21px; right: 21px; }
  .collapsed-note { left: 21px; font-size: 9px; }
  .card-category { font-size: 9px; }
  .card-bottom h2 { font-size: clamp(16px, 1.8vw, 20px); }
  .gallery-card.is-active h2 { font-size: 31px; }
  .card-action { gap: 15px; padding-inline: 14px; }
}
@media (max-width: 760px) {
  .page-width { width: calc(100% - 36px); }
  .site-header { height: 78px; gap: 20px; }
  .brand-mark { width: 38px; height: 38px; border-radius: 12px; }
  .brand-mark svg { width: 27px; height: 27px; }
  .brand-wordmark { font-size: 21px; }
  .brand-wordmark > span { font-size: 8px; margin-top: 5px; }
  .header-nav { display: none; }
  .workspace-link { min-height: 39px; gap: 15px; padding-inline: 14px; font-size: 11px; }
  .hero { display: block; padding: 37px 4px 30px; }
  .hero .eyebrow { font-size: 10px; margin-bottom: 17px; }
  h1 { font-size: clamp(32px, 7.8vw, 47px); line-height: 1.38; }
  .hero-note { margin: 21px 0 0; }
  .discipline { font-size: 10px; }
  .hero-note p { margin-top: 10px; font-size: 11px; line-height: 1.9; }
  .hero-note p br { display: none; }
  .hero-note a { display: none; }
  .gallery-heading { margin-bottom: 12px; gap: 10px; }
  .gallery-heading > p, .interaction-hint { font-size: 9px; }
  .hover-hint { display: none; }
  .touch-hint { display: inline; }
  .accordion-gallery { flex-direction: column; height: 592px; }
  .gallery-card { flex-grow: .19; min-height: 0; border-radius: 14px; }
  .gallery-card.is-active { flex-grow: .62; }
  .gallery-image { object-position: center 47%; }
  .card-top { left: 21px; right: 21px; top: 18px; }
  .card-category { font-size: 9px; }
  .card-arrow { width: 27px; height: 27px; font-size: 17px; }
  .card-bottom { bottom: 18px; left: 22px; right: 22px; }
  .card-bottom h2 { font-size: 22px; }
  .gallery-card.is-active .card-bottom { bottom: 25px; }
  .gallery-card.is-active h2 { font-size: 30px; }
  .card-kicker { margin-bottom: 9px; font-size: 10px; }
  .card-detail > p { font-size: 11px; margin-top: 12px; line-height: 1.9; }
  .card-actions { margin-top: 19px; gap: 8px; }
  .card-action { min-height: 44px; font-size: 11px; gap: 21px; padding: 0 15px; }
  .collapsed-note { display: none; }
  .sound-signature { top: 68px; height: 57px; gap: 5px; transform: scaleY(.75); }
  .gallery-footer { min-height: 48px; font-size: 9px; }
  .gallery-footer > p { font-size: 9px; }
  .collaboration-note { margin-top: 12px; gap: 12px; padding: 22px 0; }
  .note-symbol { width: 38px; height: 38px; }
  .note-symbol svg { width: 38px; height: 38px; }
  .collaboration-note h2 { font-size: 12px; }
  .collaboration-note p { font-size: 10px; margin-top: 6px; }
  .preview-label { display: none; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: 9px; font-size: 8px; padding-block: 20px; }
  .workspace-dialog { padding: 24px; border-radius: 18px; }
  .workspace-dialog h2 { font-size: 21px; }
}
@media (max-width: 360px) {
  .card-actions { gap: 7px; }
  .card-action { padding-inline: 11px; gap: 11px; }
  .card-top { left: 20px; right: 20px; }
  .card-bottom { left: 20px; right: 20px; }
  .gallery-card.is-active h2 { font-size: 27px; }
  .card-detail > p { font-size: 10px; }
}
@media (hover: none), (pointer: coarse) {
  .hover-hint { display: none; }
  .touch-hint { display: inline; }
  .gallery-image { transform: scale(1.05) !important; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .gallery-image { transform: scale(1.05) !important; }
}