:root {
  --bg: #050308;
  --bg-raised: #09060d;
  --bg-soft: #0e0913;
  --ink: #f0edf2;
  --ink-soft: #aaa3af;
  --ink-dim: #77717c;
  --violet: #c7a4d7;
  --violet-soft: #d7bfdf;
  --line: rgba(236, 225, 241, 0.14);
  --line-strong: rgba(236, 225, 241, 0.28);
  --header-height: 88px;
  --gutter: clamp(24px, 6vw, 104px);
  --content-width: 1440px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: clip;
  color-scheme: dark;
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--bg);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-weight: 300;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

button,
input,
textarea {
  font: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--violet-soft);
  outline-offset: 4px;
}

::selection {
  color: #100a14;
  background: var(--violet-soft);
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #09060d;
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: var(--header-height);
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background 350ms ease, border-color 350ms ease, backdrop-filter 350ms ease;
}

.site-header.is-scrolled {
  border-color: rgba(236, 225, 241, 0.08);
  background: rgba(5, 3, 8, 0.74);
  backdrop-filter: blur(18px) saturate(120%);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  letter-spacing: 0.12em;
  line-height: 1;
}

.brand__zh {
  font-size: 15px;
  font-weight: 500;
}

.brand__en {
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.3vw, 38px);
  color: rgba(240, 237, 242, 0.76);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.primary-nav a {
  transition: color 180ms ease;
}

.primary-nav a:hover {
  color: var(--ink);
}

.primary-nav .nav-cta {
  padding: 11px 18px 12px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  transition: color 220ms ease, background 220ms ease, border-color 220ms ease;
}

.primary-nav .nav-cta:hover {
  border-color: var(--violet-soft);
  color: #0d0811;
  background: var(--violet-soft);
}

.menu-toggle {
  display: none;
}

.scene,
.no-webgl-visual {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

#particle-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: opacity 500ms ease;
}

.scene__fog {
  position: absolute;
  width: 70vw;
  height: 70vw;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.075;
  will-change: transform;
}

.scene__fog--one {
  top: -28vw;
  left: 34vw;
  background: radial-gradient(circle, rgba(151, 87, 166, 0.65), transparent 64%);
  animation: fogDriftOne 18s ease-in-out infinite alternate;
}

.scene__fog--two {
  right: -30vw;
  bottom: -34vw;
  background: radial-gradient(circle, rgba(103, 49, 120, 0.48), transparent 62%);
  animation: fogDriftTwo 22s ease-in-out infinite alternate;
}

.scene__grain {
  position: absolute;
  inset: -60%;
  opacity: 0.028;
  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='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.52'/%3E%3C/svg%3E");
  animation: grain 900ms steps(2) infinite;
}

.no-webgl-visual {
  display: none;
  place-items: center;
  background:
    radial-gradient(circle at 62% 38%, rgba(108, 53, 126, 0.22), transparent 34%),
    var(--bg);
}

.no-webgl-visual img {
  width: min(42vw, 540px);
  filter: grayscale(1) brightness(2.8) saturate(0.6);
  opacity: 0.64;
}

body.no-webgl .scene {
  display: none;
}

body.no-webgl .no-webgl-visual {
  display: grid;
}

main,
.site-footer {
  position: relative;
  z-index: 2;
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding: calc(var(--header-height) + 40px) var(--gutter) 96px;
  overflow: hidden;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(90deg, rgba(5, 3, 8, 0.78) 0%, rgba(5, 3, 8, 0.42) 42%, rgba(5, 3, 8, 0.05) 72%);
}

.hero__copy {
  position: relative;
  isolation: isolate;
  width: min(650px, 46vw);
  margin-top: 4vh;
}

.hero__copy::before {
  position: absolute;
  z-index: -1;
  inset: -72px -120px -76px -10vw;
  content: "";
  background: radial-gradient(ellipse at 44% 48%, rgba(5, 3, 8, 0.76) 0%, rgba(5, 3, 8, 0.62) 46%, rgba(5, 3, 8, 0.20) 72%, transparent 84%);
  filter: blur(5px);
  pointer-events: none;
}

.eyebrow,
.section-kicker {
  margin: 0 0 24px;
  color: var(--violet);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.28em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 4.25vw, 74px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.24;
}

.hero h1 span {
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: titleIn 1.1s var(--ease-out) forwards;
}

.hero h1 span:nth-child(2) { animation-delay: 110ms; }
.hero h1 span:nth-child(3) { animation-delay: 220ms; }

.hero__description {
  max-width: 610px;
  margin: 32px 0 0;
  color: rgba(240, 237, 242, 0.68);
  font-size: clamp(15px, 1.15vw, 18px);
  line-height: 1.95;
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 900ms 420ms var(--ease-out) forwards;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 38px;
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 900ms 560ms var(--ease-out) forwards;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border: 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.button--primary {
  padding: 13px 25px 14px;
  color: #100a14;
  background: var(--ink);
  transition: background 220ms ease, transform 220ms ease;
}

.button--primary:hover {
  background: var(--violet-soft);
  transform: translateY(-2px);
}

.button--text {
  gap: 14px;
  padding: 10px 0;
  color: rgba(240, 237, 242, 0.72);
}

.button--text span {
  transition: transform 220ms ease;
}

.button--text:hover span {
  transform: translateY(4px);
}

.hero__signature {
  position: absolute;
  right: 16vw;
  bottom: 12vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: rgba(240, 237, 242, 0.55);
  letter-spacing: 0.22em;
  text-align: center;
}

.hero__signature span {
  font-size: clamp(16px, 1.5vw, 24px);
}

.hero__signature small {
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.18em;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(240, 237, 242, 0.48);
  font-size: 10px;
  letter-spacing: 0.22em;
  transform: translateX(-50%);
}

.scroll-cue i {
  width: 1px;
  height: 34px;
  background: linear-gradient(var(--violet-soft), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}

.approach {
  position: relative;
}

.approach__intro {
  position: relative;
  isolation: isolate;
  display: flex;
  min-height: 96svh;
  padding: 21vh var(--gutter) 15vh;
  flex-direction: column;
  justify-content: flex-end;
  text-align: left;
}

.approach__intro::before {
  position: absolute;
  z-index: -1;
  bottom: 8vh;
  left: calc(var(--gutter) - 9vw);
  width: min(920px, 72vw);
  height: 58vh;
  content: "";
  background: radial-gradient(ellipse at 42% 64%, rgba(5, 3, 8, 0.72), rgba(5, 3, 8, 0.48) 50%, transparent 78%);
  filter: blur(7px);
  pointer-events: none;
}

.approach__intro h2 {
  max-width: 760px;
}

.approach__intro h2,
.section-heading h2,
.contact h2 {
  margin: 0;
  font-size: clamp(40px, 5.5vw, 82px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.22;
}

.approach__intro > p:last-child {
  max-width: 610px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.process-step {
  display: flex;
  align-items: center;
  min-height: 128svh;
  padding: 17vh var(--gutter);
}

.process-step--right {
  justify-content: flex-end;
}

.process-step__copy {
  position: relative;
  isolation: isolate;
  width: min(570px, 43vw);
  padding: 42px 0;
  text-shadow: 0 2px 24px rgba(5, 3, 8, 0.78);
}

.process-step__copy::before {
  position: absolute;
  z-index: -1;
  inset: -80px -110px;
  content: "";
  background: radial-gradient(ellipse at center, rgba(5, 3, 8, 0.78) 0%, rgba(5, 3, 8, 0.58) 44%, rgba(5, 3, 8, 0.20) 68%, transparent 82%);
  filter: blur(6px);
  pointer-events: none;
}

.process-step[data-step="1"] {
  align-items: flex-start;
  padding-top: 25vh;
}

.process-step[data-step="2"] {
  align-items: flex-end;
  padding-bottom: 20vh;
}

.process-step[data-step="3"] {
  align-items: flex-start;
  justify-content: center;
  padding-top: 16vh;
}

.process-step[data-step="3"] .process-step__copy {
  width: min(760px, 70vw);
  text-align: center;
}

.process-step[data-step="3"] .process-step__lead,
.process-step[data-step="3"] .process-step__lead + p {
  max-width: 660px;
  margin-right: auto;
  margin-left: auto;
}

.process-step[data-step="3"] .process-tags {
  justify-content: center;
}

.process-step__index {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 0 28px;
  color: var(--violet);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
}

.process-step__index span {
  color: rgba(240, 237, 242, 0.32);
}

.process-step h3 {
  margin: 0;
  font-size: clamp(38px, 4.3vw, 68px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.28;
}

.process-step__lead {
  margin: 32px 0 12px;
  color: var(--ink);
  font-size: clamp(17px, 1.3vw, 20px);
  line-height: 1.85;
}

.process-step__lead + p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.95;
}

.process-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.process-tags li {
  color: rgba(240, 237, 242, 0.58);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.process-tags li:not(:last-child)::after {
  margin: 0 13px;
  color: rgba(240, 237, 242, 0.18);
  content: "/";
}

.content-section {
  position: relative;
  padding: clamp(120px, 16vw, 240px) var(--gutter);
  border-top: 1px solid rgba(236, 225, 241, 0.08);
  background: rgba(5, 3, 8, 0.96);
}

.services {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(5, 3, 8, 0.72), rgba(5, 3, 8, 0.83)),
    radial-gradient(ellipse at 52% 45%, rgba(73, 42, 86, 0.16), transparent 68%);
}

.services .section-heading,
.services .service-list {
  position: relative;
  isolation: isolate;
}

.services .section-heading::before,
.services .service-list::before {
  position: absolute;
  z-index: -1;
  inset: -48px -7vw;
  content: "";
  background: radial-gradient(ellipse at center, rgba(5, 3, 8, 0.74), rgba(5, 3, 8, 0.38) 58%, transparent 82%);
  filter: blur(7px);
  pointer-events: none;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  gap: clamp(40px, 8vw, 150px);
  align-items: end;
  max-width: var(--content-width);
  margin: 0 auto clamp(72px, 10vw, 150px);
}

.section-heading .section-kicker {
  grid-column: 1 / -1;
  margin-bottom: -12px;
}

.section-heading p:last-child {
  margin: 0 0 10px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.9;
}

.service-list,
.collaboration-list {
  max-width: var(--content-width);
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.service-item {
  position: relative;
  display: grid;
  grid-template-columns: 90px minmax(260px, 0.8fr) minmax(300px, 1fr) 40px;
  gap: 34px;
  align-items: center;
  min-height: 172px;
  border-bottom: 1px solid var(--line);
  transition: border-color 300ms ease;
}

.service-item::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(116, 65, 131, 0.13), transparent 70%);
  opacity: 0;
  transform: scaleX(0.6);
  transform-origin: left;
  transition: opacity 450ms ease, transform 650ms var(--ease-out);
}

.service-item:hover::before {
  opacity: 1;
  transform: scaleX(1);
}

.service-item__number {
  color: var(--ink-dim);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.service-item h3 {
  margin: 0;
  font-size: clamp(22px, 2.2vw, 34px);
  font-weight: 400;
}

.service-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.service-item i {
  position: relative;
  width: 30px;
  height: 1px;
  background: var(--line-strong);
  transition: width 300ms ease, background 300ms ease;
}

.service-item:hover i {
  width: 38px;
  background: var(--violet);
}

.audiences {
  background:
    radial-gradient(circle at 88% 14%, rgba(93, 48, 108, 0.14), transparent 28%),
    rgba(7, 4, 10, 0.98);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--content-width);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.audience-item {
  min-height: 360px;
  padding: 48px 42px 56px 0;
}

.audience-item + .audience-item {
  padding-left: 42px;
  border-left: 1px solid var(--line);
}

.audience-item span,
.collaboration-item span {
  color: var(--ink-dim);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.audience-item h3 {
  margin: 84px 0 24px;
  font-size: clamp(24px, 2.3vw, 36px);
  font-weight: 400;
}

.audience-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.collaboration {
  background: rgba(5, 3, 8, 0.98);
}

.collaboration-item {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1fr);
  gap: 64px;
  align-items: center;
  min-height: 190px;
  border-bottom: 1px solid var(--line);
}

.collaboration-item h3 {
  margin: 8px 0 0;
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 400;
}

.collaboration-item p {
  margin: 0;
  color: var(--ink-soft);
}

.collaboration-note {
  max-width: 780px;
  margin: 48px 0 0 auto;
  padding-left: 24px;
  border-left: 1px solid var(--violet);
  color: rgba(240, 237, 242, 0.65);
  font-size: 14px;
}

.contact {
  position: relative;
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(420px, 1fr);
  gap: clamp(70px, 10vw, 180px);
  min-height: 100svh;
  padding: clamp(140px, 15vw, 220px) var(--gutter);
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: rgba(5, 3, 8, 0.93);
}

.contact__glow {
  position: absolute;
  top: 8%;
  left: -16%;
  width: 58vw;
  height: 58vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(133, 75, 149, 0.18), transparent 62%);
  filter: blur(70px);
}

.contact__intro,
.contact-form {
  position: relative;
  z-index: 1;
}

.contact__intro > p:not(.section-kicker) {
  max-width: 580px;
  margin: 32px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.contact__direct {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-top: 48px;
  color: rgba(240, 237, 242, 0.75);
  font-size: 14px;
  letter-spacing: 0.05em;
}

.contact__direct a {
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.contact__direct a:hover {
  border-color: var(--violet);
  color: var(--ink);
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px 24px;
  align-self: center;
}

.form-field {
  position: relative;
}

.form-field--wide {
  grid-column: 1 / -1;
}

.form-field label {
  display: block;
  margin-bottom: 8px;
  color: rgba(240, 237, 242, 0.66);
  font-size: 12px;
  letter-spacing: 0.09em;
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  outline: none;
  color: var(--ink);
  background: transparent;
  transition: border-color 220ms ease, box-shadow 220ms ease;
}

.form-field input {
  height: 48px;
}

.form-field textarea {
  min-height: 150px;
  padding: 10px 0;
  resize: vertical;
  line-height: 1.75;
}

.form-field textarea::placeholder {
  color: rgba(170, 163, 175, 0.42);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--violet-soft);
  box-shadow: 0 10px 24px -24px var(--violet-soft);
}

.form-field.is-invalid input,
.form-field.is-invalid textarea {
  border-color: #dc8ca5;
}

.form-error {
  display: block;
  min-height: 20px;
  padding-top: 5px;
  color: #dc9bac;
  font-size: 11px;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-submit {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 6px;
}

.form-submit button[disabled] {
  cursor: wait;
  opacity: 0.56;
  transform: none;
}

.form-status {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.form-status.is-success { color: var(--violet-soft); }
.form-status.is-error { color: #dc9bac; }

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  min-height: 220px;
  padding: 70px var(--gutter) 48px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.site-footer strong {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.site-footer p {
  margin: 8px 0 0;
  color: var(--ink-dim);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-note {
  position: fixed;
  z-index: 200;
  right: 16px;
  bottom: 16px;
  max-width: 360px;
  padding: 14px 18px;
  color: #100a14;
  background: var(--ink);
  font-size: 13px;
}

@keyframes titleIn {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.35; transform: scaleY(0.72); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

@keyframes fogDriftOne {
  to { transform: translate3d(-8vw, 7vw, 0) scale(1.12); }
}

@keyframes fogDriftTwo {
  to { transform: translate3d(-9vw, -4vw, 0) scale(1.08); }
}

@keyframes grain {
  0% { transform: translate3d(-3%, 2%, 0); }
  25% { transform: translate3d(2%, -4%, 0); }
  50% { transform: translate3d(4%, 3%, 0); }
  75% { transform: translate3d(-4%, -2%, 0); }
  100% { transform: translate3d(3%, 4%, 0); }
}

@media (max-width: 1100px) {
  :root { --header-height: 76px; }

  .primary-nav > a:not(.nav-cta) { display: none; }
  .hero__copy { width: min(620px, 55vw); }
  .hero__signature { right: 10vw; }

  .service-item {
    grid-template-columns: 54px minmax(240px, 0.9fr) minmax(280px, 1fr) 30px;
    gap: 24px;
  }

  .audience-item { padding-right: 28px; }
  .audience-item + .audience-item { padding-left: 28px; }
}

@media (max-width: 820px) {
  :root { --gutter: 24px; }

  .site-header { padding: 0 22px; }

  .menu-toggle {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 0;
    color: var(--ink);
    background: none;
    font-size: 12px;
    letter-spacing: 0.12em;
  }

  .menu-toggle i,
  .menu-toggle i::after {
    display: block;
    width: 22px;
    height: 1px;
    background: currentColor;
    transition: transform 220ms ease;
  }

  .menu-toggle i::after {
    content: "";
    transform: translateY(6px);
  }

  .menu-toggle[aria-expanded="true"] i { transform: rotate(45deg) translateY(3px); }
  .menu-toggle[aria-expanded="true"] i::after { transform: rotate(-90deg); }

  .primary-nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
    padding: 96px 12vw;
    visibility: hidden;
    opacity: 0;
    background: rgba(5, 3, 8, 0.98);
    transform: translateY(-10px);
    transition: opacity 240ms ease, transform 240ms ease, visibility 240ms;
  }

  .primary-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .primary-nav > a:not(.nav-cta) {
    display: block;
    font-size: 24px;
  }

  .primary-nav .nav-cta { margin-top: 16px; }

  .hero {
    align-items: flex-end;
    min-height: 100svh;
    padding-top: 43svh;
    padding-bottom: 82px;
  }

  .hero::after {
    background: linear-gradient(0deg, rgba(5, 3, 8, 0.96) 0%, rgba(5, 3, 8, 0.54) 53%, rgba(5, 3, 8, 0.08) 78%);
  }

  .hero__copy {
    width: 100%;
    margin: 0;
  }

  .hero__copy::before {
    inset: -54px -8vw -42px;
    background: linear-gradient(0deg, rgba(5, 3, 8, 0.88) 0%, rgba(5, 3, 8, 0.82) 68%, rgba(5, 3, 8, 0.28) 92%, transparent 100%);
    filter: blur(4px);
  }

  .hero h1 {
    font-size: clamp(26px, 7.9vw, 48px);
    line-height: 1.3;
  }

  .hero__description {
    margin-top: 22px;
    font-size: 14px;
    line-height: 1.85;
  }

  .hero__actions {
    align-items: flex-start;
    margin-top: 26px;
  }

  .hero__signature {
    top: 32svh;
    right: 50%;
    bottom: auto;
    transform: translateX(50%);
  }

  .hero__signature small { display: none; }
  .scroll-cue { display: none; }

  .approach__intro {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 82svh;
    padding-top: 28svh;
    padding-bottom: 10svh;
    text-align: left;
  }

  .approach__intro h2,
  .section-heading h2,
  .contact h2 {
    font-size: clamp(36px, 10.8vw, 58px);
  }

  .approach__intro > p:last-child {
    margin-left: 0;
    font-size: 15px;
  }

  .approach__intro::before {
    bottom: 3vh;
    left: -8vw;
    width: 116vw;
    height: 54vh;
    background: linear-gradient(0deg, rgba(5, 3, 8, 0.88), rgba(5, 3, 8, 0.80) 68%, transparent);
    filter: blur(4px);
  }

  .process-step,
  .process-step--right {
    align-items: flex-end;
    justify-content: flex-start;
    min-height: 108svh;
    padding: 43svh var(--gutter) 10svh;
  }

  .process-step[data-step="1"],
  .process-step[data-step="2"],
  .process-step[data-step="3"] {
    align-items: flex-end;
    justify-content: flex-start;
    padding: 43svh var(--gutter) 10svh;
  }

  .process-step__copy {
    width: 100%;
    padding: 30px 0 20px;
    text-align: left;
  }

  .process-step__copy::before {
    inset: -42px -28px -26px;
    background: linear-gradient(0deg, rgba(5, 3, 8, 0.90) 0%, rgba(5, 3, 8, 0.84) 62%, rgba(5, 3, 8, 0.36) 88%, transparent 100%);
    filter: blur(4px);
  }

  .process-step[data-step="3"] .process-step__copy {
    width: 100%;
    text-align: left;
  }

  .process-step[data-step="3"] .process-step__lead,
  .process-step[data-step="3"] .process-step__lead + p {
    max-width: none;
    margin-right: 0;
    margin-left: 0;
  }

  .process-step[data-step="3"] .process-tags {
    justify-content: flex-start;
  }

  .process-step h3 {
    font-size: clamp(34px, 9vw, 50px);
  }

  .process-step__lead { margin-top: 24px; font-size: 16px; }
  .process-step__lead + p { color: rgba(240, 237, 242, 0.78); font-size: 15px; }

  .content-section { padding-top: 120px; padding-bottom: 120px; }

  .section-heading {
    display: block;
    margin-bottom: 64px;
  }

  .section-heading .section-kicker { margin-bottom: 24px; }
  .section-heading p:last-child { margin-top: 26px; }

  .service-item {
    grid-template-columns: 38px 1fr;
    gap: 10px 18px;
    min-height: 0;
    padding: 34px 0;
  }

  .service-item h3 { font-size: 24px; }
  .service-item p { grid-column: 2; margin-top: 8px; font-size: 14px; }
  .service-item i { display: none; }

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

  .audience-item,
  .audience-item + .audience-item {
    min-height: 0;
    padding: 36px 0 42px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .audience-item:last-child { border-bottom: 0; }
  .audience-item h3 { margin: 48px 0 18px; font-size: 28px; }

  .collaboration-item {
    grid-template-columns: 1fr;
    gap: 22px;
    min-height: 0;
    padding: 38px 0 42px;
  }

  .collaboration-item h3 { font-size: 30px; }
  .collaboration-item p { font-size: 14px; }

  .contact {
    grid-template-columns: 1fr;
    gap: 72px;
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .contact-form { grid-template-columns: 1fr; }
  .form-field--wide { grid-column: auto; }
  .form-submit { align-items: flex-start; flex-direction: column; }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 36px;
  }
}

@media (max-width: 520px) {
  .brand { gap: 10px; }
  .brand__zh { font-size: 14px; }
  .brand__en { font-size: 9px; }
  .menu-toggle span { display: none; }

  .hero__actions {
    flex-direction: column;
    gap: 8px;
  }

  .button--primary { width: 100%; }
  .button--text { min-height: 42px; }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .hero h1 span,
  .hero__description,
  .hero__actions,
  .reveal {
    opacity: 1;
    transform: none;
  }

  .scene__grain { display: none; }
}

/* v3: a continuous reading stage; four texts share the same viewport. */
.js .approach { height: 380svh; }
.js .approach-stage {
  position: sticky; top: 0; height: 100svh;
  perspective: 1500px; overflow: hidden;
}
.js .story-panel {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: flex-start;
  min-height: 0; padding: calc(var(--header-height) + 28px) var(--gutter) 80px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translate3d(0,30px,-90px) rotateY(-7deg);
  transition: opacity .45s ease, transform .8s var(--ease-out), visibility .45s;
}
.js .story-panel.is-current {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translate3d(0,0,0) rotateY(0deg);
}
.js .approach__intro.story-panel { flex-direction: column; align-items: flex-start; justify-content: center; }
.js .approach__intro h2 { max-width: 620px; font-size: clamp(38px,4.7vw,70px); }
.js .approach__intro > p:last-child { max-width: 520px; }
.js .process-step__copy { width: min(550px,43vw); padding: 0; }
.js .process-step[data-step="2"] { justify-content: flex-end; }
.js .process-step[data-step="3"] { justify-content: flex-start; }
.js .process-step[data-step="3"] .process-step__copy { width: min(550px,43vw); text-align:left; }
.js .process-step[data-step="3"] .process-tags { justify-content:flex-start; }
.js .process-step h3 { font-size: clamp(34px,3.7vw,56px); }
.story-progress { position:absolute; bottom:32px; left:var(--gutter); display:flex; gap:24px; color:var(--ink-dim); font-size:12px; letter-spacing:.12em; }
.story-progress span { padding-top:12px; border-top:2px solid rgba(236,225,241,.12); min-width:54px; transition:color .3s,border-color .3s; }
.story-progress .is-current { color:var(--violet-soft); border-color:var(--violet-soft); }
.content-section { padding-top:clamp(80px,8vw,130px); padding-bottom:clamp(80px,8vw,130px); perspective:1400px; }
.service-list,.audience-grid,.collaboration-list { perspective:1200px; }
.js .reveal { opacity:.15; transform:translate3d(0,65px,-130px) rotateX(14deg) rotateY(-4deg); transform-origin:50% 80%; transition:opacity .7s ease,transform 1.05s var(--ease-out); backface-visibility:hidden; }
.js .reveal.is-visible { opacity:1; transform:translate3d(0,0,0) rotateX(0) rotateY(0); }
.js .service-item { border:1px solid var(--line); border-radius:14px; padding:30px; margin-bottom:14px; background:linear-gradient(125deg,rgba(42,28,54,.68),rgba(10,7,15,.80)); box-shadow:0 18px 55px rgba(0,0,0,.22); }
.js .audience-item { border:1px solid var(--line); border-radius:14px; padding:30px; background:linear-gradient(145deg,rgba(40,28,52,.58),rgba(10,7,15,.80)); }
.js .service-item:hover,.js .audience-item:hover { transform:translate3d(0,-6px,12px) rotateX(2deg); border-color:rgba(199,164,215,.4); }
.js .collaboration-item { border-radius:12px; background:linear-gradient(110deg,rgba(36,26,46,.40),transparent); padding-left:24px; padding-right:24px; }
.hero h1 { font-size:clamp(38px,3.7vw,66px); }
.hero__copy { width:min(650px,48vw); }
@media(max-width:820px){
  .js .approach { height:330svh; }
  .js .story-panel { padding:calc(var(--header-height) + 18px) var(--gutter) 72px; align-items:center; }
  .js .approach__intro.story-panel { justify-content:center; }
  .js .process-step__copy,.js .process-step[data-step="3"] .process-step__copy { width:100%; }
  .js .process-step h3,.js .approach__intro h2 { font-size:clamp(29px,8vw,44px); }
  .js .process-step__lead { font-size:16px; margin-top:20px; }
  .js .process-step__lead + p { font-size:14px; line-height:1.85; }
  .js .process-step__copy::before { background:radial-gradient(ellipse,rgba(5,3,8,.92),rgba(5,3,8,.76) 60%,transparent 85%); }
  .story-progress { bottom:22px; gap:15px; }
  .hero h1 { font-size:clamp(26px,7.9vw,48px); }
  .hero__copy { width:100%; }
  .js .service-item { padding:22px 18px; }
  .js .reveal { transform:translate3d(0,35px,-65px) rotateX(8deg); }
}
@media(prefers-reduced-motion:reduce){
 .js .reveal,.js .reveal.is-visible,.js .story-panel,.js .story-panel.is-current { transform:none;transition:none; }
 .js .service-item:hover,.js .audience-item:hover { transform:none; }
}
/* Keep the viewport as the sticky scroll container. */
body { overflow-x:clip; }

/* v4: centered brand, split typography, diagonal light and asymmetric scenes. */
.hero { display:grid; grid-template-columns:29% 42% 29%; align-items:center; min-height:100svh; padding-top:var(--header-height); padding-bottom:100px; }
.hero__copy { grid-column:1; width:100%; margin:0; }
.hero__copy::before { inset:-80px -32px; background:radial-gradient(ellipse,rgba(5,3,8,.75),transparent 80%); }
.hero::after { background:linear-gradient(90deg,rgba(5,3,8,.35),transparent 35%,transparent 65%,rgba(5,3,8,.35)); }
.hero h1 { font-size:clamp(27px,2.32vw,43px); line-height:1.5; font-weight:400; letter-spacing:-.04em; }
.hero .eyebrow { font-size:9px; letter-spacing:.18em; margin-bottom:20px; }
.hero__aside { grid-column:3; position:relative; isolation:isolate; padding-left:16px; }
.hero__aside::before { content:"";position:absolute;inset:-45px -35px;z-index:-1;background:radial-gradient(ellipse,rgba(5,3,8,.8),transparent 80%); }
.hero__aside-label { margin:0 0 15px;font-size:18px;font-weight:400;letter-spacing:.08em; }
.hero__description { margin:0;font-size:14px;line-height:1.95; }
.hero__actions { flex-direction:column;align-items:flex-start;gap:20px;margin-top:28px; }
.hero__signature { right:50%;transform:translateX(50%);bottom:140px;text-align:center; }
.hero__signature span { font-size:16px;letter-spacing:.34em; }
.hero__signature small { font-size:10px; }
.js .story-panel { padding:0; }
.js .process-step__copy,.js .process-step[data-step="3"] .process-step__copy { position:static;width:100%;padding:0; }
.js .process-step__copy::before { display:none; }
.js .process-step__index { position:absolute;top:19vh;left:var(--gutter);margin:0; }
.js .process-step h3 { position:absolute;top:25vh;left:var(--gutter);width:min(410px,30vw);margin:0;font-size:clamp(30px,3vw,48px);line-height:1.4; }
.process-step__details { position:absolute;bottom:17vh;right:var(--gutter);width:min(410px,30vw);isolation:isolate; }
.process-step__details::before { content:"";position:absolute;inset:-42px -30px;z-index:-1;background:radial-gradient(ellipse,rgba(5,3,8,.87),rgba(5,3,8,.6) 60%,transparent 90%); }
.js .process-step__lead { margin:0 0 18px;font-size:16px;line-height:1.9; }
.js .process-step__lead + p { font-size:14px;line-height:1.9; }
.js .process-tags { margin-top:24px; }
.js .process-tags li { font-size:11px; }
.js .process-step[data-step="2"] h3,.js .process-step[data-step="2"] .process-step__index { left:auto;right:var(--gutter); }
.js .process-step[data-step="2"] .process-step__details { right:auto;left:var(--gutter); }
.js .approach__intro.story-panel { padding:0; }
.js .approach__intro .section-kicker { position:absolute;top:19vh;left:var(--gutter); }
.js .approach__intro h2 { position:absolute;top:25vh;left:var(--gutter);max-width:420px;width:30vw;font-size:clamp(32px,3.2vw,48px);line-height:1.4; }
.js .approach__intro > p:last-child { position:absolute;bottom:21vh;right:var(--gutter);max-width:380px;width:29vw;margin:0;font-size:16px; }
.js .approach__intro::before { display:none; }
.services { display:grid;grid-template-columns:.8fr 1.2fr;column-gap:6vw;min-height:110svh;background:linear-gradient(90deg,rgba(5,3,8,.12),rgba(5,3,8,.40) 44%,rgba(5,3,8,.72)); }
.services .section-heading { grid-column:2;display:block; margin:0 0 34px; }
.services .section-heading h2 { font-size:clamp(32px,3.5vw,52px); }
.services .section-heading > p:last-child { margin-top:20px;font-size:14px;max-width:480px; }
.services .section-heading::before,.services .service-list::before { display:none; }
.services .service-list { grid-column:2;display:grid;grid-template-columns:1fr 1fr;gap:16px;border:0; }
.js .services .service-item { display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:0;min-height:235px;padding:25px;margin:0;border-radius:4px; }
.services .service-item__number { margin-bottom:38px; }
.services .service-item h3 { font-size:22px;line-height:1.5;margin-bottom:16px; }
.services .service-item p { font-size:13px;line-height:1.85; }
.services .service-item i { display:none; }
.js .services .service-item:nth-child(even):not(.is-visible) { transform:translate3d(60px,40px,-180px) rotateY(-22deg) rotateX(6deg); }
.js .services .service-item:nth-child(odd):not(.is-visible) { transform:translate3d(-30px,55px,-140px) rotateY(16deg) rotateX(10deg); }
.js .audience-item:not(.is-visible) { transform:translate3d(0,70px,-160px) rotateX(20deg); }
.js .collaboration-item:nth-child(even):not(.is-visible) { transform:translate3d(70px,30px,-90px) rotateY(-12deg); }
.contact { background:linear-gradient(90deg,rgba(5,3,8,.92),rgba(5,3,8,.65),rgba(5,3,8,.87)); }
.no-webgl-visual img { width:min(34vw,460px); }
@media(max-width:1100px) and (min-width:821px){
 .hero { grid-template-columns:28% 44% 28%; }
 .hero h1 { font-size:26px; }
 .hero__aside { padding-left:0; }
 .hero__description { font-size:13px; }
 .hero__actions .button { font-size:12px; }
 .services { grid-template-columns:.6fr 1.4fr;gap:3vw; }
}
@media(max-width:820px){
 .hero { display:flex;flex-direction:column;align-items:stretch;justify-content:flex-end;min-height:100svh;padding-top:45svh;padding-bottom:70px;gap:22px; }
 .hero__copy { width:100%; }
 .hero .eyebrow { position:absolute;top:calc(var(--header-height) + 12px);left:var(--gutter);font-size:9px; }
 .hero h1 { font-size:clamp(27px,7.5vw,40px);line-height:1.4; }
 .hero__aside { padding:0; }
 .hero__aside-label { display:none; }
 .hero__description { font-size:14px; }
 .hero__actions { flex-direction:row;flex-wrap:wrap;gap:20px;margin-top:20px;align-items:center; }
 .hero__signature { display:none; }
 .js .process-step__index,.js .approach__intro .section-kicker { top:calc(var(--header-height) + 24px); }
 .js .process-step h3,.js .approach__intro h2 { top:calc(var(--header-height) + 64px);left:var(--gutter);right:auto;width:calc(100% - 2*var(--gutter));max-width:none;font-size:clamp(28px,7.7vw,40px); }
 .process-step__details,.js .process-step[data-step="2"] .process-step__details { left:var(--gutter);right:auto;bottom:82px;width:calc(100% - 2*var(--gutter)); }
 .js .process-step[data-step="2"] h3,.js .process-step[data-step="2"] .process-step__index { left:var(--gutter);right:auto; }
 .js .process-step__lead { font-size:14px;margin-bottom:12px; }
 .js .process-step__lead + p { font-size:13px; }
 .js .process-tags { margin-top:16px; }
 .js .approach__intro > p:last-child { left:var(--gutter);right:auto;bottom:100px;width:calc(100% - 2*var(--gutter));max-width:none; }
 .services { display:block;min-height:0;background:linear-gradient(90deg,rgba(5,3,8,.5),rgba(5,3,8,.85)); }
 .services .section-heading { margin-bottom:30px; }
 .services .service-list { grid-template-columns:1fr 1fr;gap:12px; }
 .js .services .service-item { padding:18px;min-height:245px; }
 .services .service-item h3 { font-size:18px; }
 .services .service-item p { font-size:12px; }
 .services .service-item__number { margin-bottom:22px; }
 .no-webgl-visual img { width:60vw;align-self:start;margin-top:16vh; }
}
@media(max-width:359px){ .services .service-list { grid-template-columns:1fr; } }
@media(prefers-reduced-motion:reduce){
 .js .services .service-item:not(.is-visible),.js .audience-item:not(.is-visible),.js .collaboration-item:not(.is-visible) { transform:none; }
}
@media(max-width:820px){
 .hero__copy { position:static; }
 .hero__copy::before { display:none; }
}
section[id] { scroll-margin-top:calc(var(--header-height) + 16px); }

/* First paint remains populated while WebGL assets and shaders initialize. */
.scene__startup { position:absolute;inset:0;width:100%;height:100%;opacity:1;transition:opacity .35s ease; }
.scene.is-ready .scene__startup { opacity:0; }
@media (prefers-reduced-motion:reduce) { .scene__startup { transition:none; } }