:root {
  --bg: #f7f5ef;
  --ink: #151515;
  --muted: rgba(21, 21, 21, 0.58);
  --line: rgba(21, 21, 21, 0.12);
  --accent: #ff5722;
  --card: rgba(255, 255, 255, 0.5);
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, Arial, "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html {
  max-width: 100%;
  overflow-x: clip;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 12%, rgba(255, 87, 34, 0.13), transparent 30rem),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  background-image:
    radial-gradient(rgba(21, 21, 21, 0.16) 1.3px, transparent 1.3px),
    repeating-radial-gradient(ellipse at 18% 16%, transparent 0 92px, rgba(255, 87, 34, 0.12) 94px 96px, transparent 98px 170px);
  background-size: 28px 28px, 860px 640px;
  mask-image: linear-gradient(to bottom, transparent, black 11%, black 90%, transparent);
  pointer-events: none;
}

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

#dot-grid,
#ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

#dot-grid { z-index: -2; opacity: 0.52; }
#ambient-canvas { z-index: -3; opacity: 0.55; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 28px;
  background: rgba(247, 245, 239, 0.66);
  border-bottom: 1px solid rgba(21, 21, 21, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  position: relative;
  display: inline-flex;
  gap: 0;
  font-size: 25px;
  font-weight: 950;
  letter-spacing: -0.1em;
}

.brand span {
  display: inline-block;
  transform-origin: center;
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1), color 220ms ease, filter 220ms ease;
}

.brand.brand-flash span:nth-child(1) { transform: translateX(-5px) skewX(-8deg); }
.brand.brand-flash span:nth-child(2) { transform: translateY(-9px) rotate(-8deg); color: var(--accent); }
.brand.brand-flash span:nth-child(3) { transform: translateY(7px) rotate(8deg); }
.brand.brand-flash span:nth-child(4) { transform: translateX(6px) skewX(10deg); color: var(--accent); }

.brand.brand-flash::after {
  content: "";
  position: absolute;
  left: 32%;
  top: 52%;
  width: 34px;
  height: 4px;
  background: var(--accent);
  transform: translateY(-50%) rotate(90deg);
  animation: brandSlash 520ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.nav {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.nav a {
  opacity: 0.55;
  transition: color 220ms ease, opacity 220ms ease;
}

.nav a:hover { color: var(--accent); opacity: 1; }

.lang {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(21, 21, 21, 0.07);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.46);
  padding: 13px 24px;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 800;
  letter-spacing: 0.18em;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(21, 21, 21, 0.1);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.58);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2px auto;
  background: var(--ink);
  transition: transform 240ms ease, opacity 180ms ease;
}

.site-header.menu-open .menu-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header.menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
.site-header.menu-open .menu-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.section {
  position: relative;
  min-height: 100vh;
  padding: 110px 6vw;
}

.hero {
  display: grid;
  place-items: center;
  max-width: 100vw;
  overflow: clip;
  padding: 96px 2vw 44px;
  contain: paint;
}

.hero-marquee {
  position: absolute;
  left: 0;
  display: flex;
  width: max-content;
  white-space: nowrap;
  font-weight: 950;
  line-height: 0.88;
  letter-spacing: -0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

.hero-marquee span { padding-right: 56px; }
.hero-marquee-dark {
  top: 32vh;
  color: rgba(21, 21, 21, 0.86);
  font-size: clamp(92px, 17vw, 280px);
  animation: marquee 92s linear infinite;
}
.hero-marquee-orange {
  top: 54vh;
  color: rgba(255, 87, 34, 0.82);
  font-size: clamp(78px, 13vw, 220px);
  animation: marqueeReverse 108s linear infinite;
}

.hero-stage {
  position: relative;
  z-index: 4;
  display: grid;
  place-items: center;
  width: min(1180px, 92vw);
  min-height: min(650px, 72vh);
  border-radius: 6px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.56), rgba(212, 216, 218, 0.74)),
    #d8dcde;
  box-shadow: 0 24px 100px rgba(21, 21, 21, 0.12);
  transform-origin: center;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
  isolation: isolate;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: -20%;
  z-index: 4;
  background:
    linear-gradient(110deg, transparent 0 42%, rgba(255, 255, 255, 0.35) 48%, transparent 56%),
    radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 87, 34, 0.16), transparent 22rem);
  animation: sheen 6s ease-in-out infinite;
  pointer-events: none;
}

.hero-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.012);
  transition: opacity 700ms ease, filter 700ms ease;
  filter: saturate(0.92) contrast(1.02);
}

.hero-stage.video-ready .hero-video {
  opacity: 0.92;
}

.hero-stage.video-ready .mg-scene {
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
}

.hero-video-fx {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(247, 245, 239, 0.55), transparent 26%, transparent 74%, rgba(247, 245, 239, 0.46)),
    radial-gradient(circle at 50% 48%, rgba(255, 87, 34, 0.16), transparent 28rem),
    repeating-linear-gradient(90deg, transparent 0 76px, rgba(21, 21, 21, 0.045) 77px 78px, transparent 79px 154px);
  mix-blend-mode: normal;
  pointer-events: none;
}

.hero-video-fx::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0 38%, rgba(255, 87, 34, 0.16) 43%, transparent 49%);
  animation: labScan 5.6s cubic-bezier(0.45, 0, 0.2, 1) infinite;
  opacity: 0.78;
}

.hero-video-fx::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 87, 34, 0.28) 1.5px, transparent 1.5px);
  background-size: 42px 42px;
  opacity: 0.34;
  mask-image: radial-gradient(circle at center, black, transparent 70%);
}

.lab-node {
  position: absolute;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 87, 34, 0.58);
  box-shadow: 0 0 0 7px rgba(255, 87, 34, 0.08), 0 0 34px rgba(255, 87, 34, 0.36);
  animation: nodePulse 3.8s ease-in-out infinite;
}

.node-a { left: 18%; top: 26%; }
.node-b { right: 18%; top: 34%; animation-delay: 0.7s; }
.node-c { left: 56%; bottom: 22%; animation-delay: 1.2s; }

.lab-line {
  position: absolute;
  height: 1px;
  width: 38%;
  background: linear-gradient(90deg, transparent, rgba(255, 87, 34, 0.34), transparent);
  transform-origin: left center;
  opacity: 0.54;
}

.line-a { left: 20%; top: 29%; transform: rotate(15deg); }
.line-b { left: 46%; bottom: 29%; transform: rotate(-21deg); }

.lab-panel {
  position: absolute;
  width: 190px;
  height: 110px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.16)),
    repeating-linear-gradient(180deg, rgba(21, 21, 21, 0.08) 0 2px, transparent 2px 16px);
  box-shadow: 0 20px 60px rgba(21, 21, 21, 0.07);
  backdrop-filter: blur(12px);
  opacity: 0.44;
  animation: panelFloat 6s ease-in-out infinite;
}

.panel-a { left: 7%; bottom: 15%; }
.panel-b { right: 8%; top: 16%; animation-delay: 1.4s; }

.hero-letter {
  position: absolute;
  z-index: 5;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%);
  color: var(--accent);
  font-size: clamp(130px, 27vw, 440px);
  font-weight: 950;
  letter-spacing: -0.14em;
  opacity: 0.95;
}

.mg-scene {
  position: relative;
  z-index: 3;
  width: min(420px, 54vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  filter: drop-shadow(0 24px 70px rgba(255, 87, 34, 0.22));
  transition: opacity 500ms ease, transform 500ms ease;
}

.mg-core {
  position: relative;
  width: 46%;
  height: 58%;
  border-radius: 48% 48% 42% 42%;
  background: linear-gradient(160deg, #f7f7f3, #d9dee0);
  animation: float 4.5s ease-in-out infinite;
}

.mg-head {
  position: absolute;
  top: 10%;
  left: 16%;
  width: 68%;
  height: 52%;
  border-radius: 50% 50% 42% 42%;
  background: linear-gradient(160deg, #ffffff, #d8dcde);
  box-shadow: inset 0 -8px 22px rgba(21, 21, 21, 0.08);
}

.mg-visor {
  position: absolute;
  top: 32%;
  left: 20%;
  width: 76%;
  height: 23%;
  border-radius: 50% 10px 20px 50%;
  background: rgba(255, 139, 52, 0.68);
  border: 1px solid rgba(255, 87, 34, 0.45);
  transform: rotate(-5deg);
}

.mg-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent, rgba(255, 87, 34, 0.34), transparent);
  height: 28%;
  animation: scan 2.4s ease-in-out infinite;
}

.mg-orbit {
  position: absolute;
  border: 2px solid rgba(255, 87, 34, 0.28);
  border-radius: 50%;
}

.orbit-a {
  width: 92%;
  height: 48%;
  transform: rotate(-18deg);
  animation: orbitA 7s linear infinite;
}

.orbit-b {
  width: 68%;
  height: 104%;
  transform: rotate(28deg);
  animation: orbitB 9s linear infinite;
}

.mg-chip {
  position: absolute;
  border: 1px solid rgba(255, 87, 34, 0.28);
  border-radius: 999px;
  background: rgba(247, 245, 239, 0.7);
  padding: 8px 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  backdrop-filter: blur(10px);
}

.chip-a { left: 0; top: 28%; animation: chip 3.8s ease-in-out infinite; }
.chip-b { right: 4%; top: 18%; animation: chip 4.2s ease-in-out infinite reverse; }
.chip-c { right: 18%; bottom: 13%; animation: chip 3.4s ease-in-out infinite; }

.signature {
  position: absolute;
  z-index: 8;
  width: min(980px, 80vw);
  height: auto;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
  transition: opacity 500ms ease, transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.signature path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 28;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 2400;
  stroke-dashoffset: 2400;
}

.hero.signature-on .signature {
  opacity: 1;
  transform: scale(1);
}

.hero.signature-on .signature path {
  animation: drawSignature 1.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero.signature-on .hero-stage {
  transform: scale(0.72);
  opacity: 0.72;
}

.hero.signature-on .hero-stage.video-ready .hero-video {
  opacity: 0.45;
  filter: saturate(0.72) contrast(0.96) blur(1px);
}

.hero.signature-on .hero-video-fx {
  opacity: 0.46;
}

.hero-meta {
  position: absolute;
  bottom: 38px;
  z-index: 8;
  font-size: 24px;
}

.hero-meta span {
  display: block;
  margin-bottom: 8px;
  color: rgba(21, 21, 21, 0.48);
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.18em;
}

.hero-meta.left { left: 5vw; }
.hero-meta.right { right: 5vw; text-align: right; }
.hero-meta i {
  display: block;
  width: 44px;
  height: 6px;
  margin: 0 0 12px auto;
  background: var(--accent);
}

.section-head {
  position: relative;
  z-index: 2;
  text-align: center;
}

.section-head h2,
.contact h2 {
  margin: 0;
  color: var(--accent);
  font-size: clamp(58px, 9vw, 148px);
  font-weight: 950;
  line-height: 0.9;
  letter-spacing: -0.07em;
}

.section-head p {
  max-width: 860px;
  margin: 24px auto 0;
  color: rgba(21, 21, 21, 0.66);
  font-size: clamp(16px, 1.5vw, 22px);
  line-height: 1.8;
}

.section-head span {
  display: inline-block;
  margin-top: 24px;
  color: rgba(21, 21, 21, 0.4);
  font-family: var(--mono);
  letter-spacing: 0.24em;
}

.letter-stage {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 70px;
}

.letter-card,
.skill-card,
.capability-card,
.ability-card,
.work-card,
.tool-card,
.qr-panel {
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: var(--card);
  box-shadow: 0 24px 80px rgba(21, 21, 21, 0.06);
  backdrop-filter: blur(18px);
}

.letter-card {
  min-height: 292px;
  padding: 28px;
  border-radius: 10px;
  transition: transform 350ms ease, box-shadow 350ms ease;
}

.letter-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 34px 92px rgba(255, 87, 34, 0.16);
}

.letter {
  display: block;
  margin-bottom: 32px;
  font-size: clamp(72px, 9vw, 124px);
  font-weight: 950;
  line-height: 0.78;
  letter-spacing: -0.1em;
}

small {
  color: var(--accent);
  font-family: var(--mono);
  letter-spacing: 0.18em;
}

.letter-card h3,
.skill-card h3,
.work-card h3,
.tool-card h3 {
  margin: 14px 0;
  font-size: clamp(24px, 3vw, 42px);
  letter-spacing: -0.05em;
}

.letter-card p,
.skill-card p,
.capability-card p,
.work-card p,
.tool-card p {
  color: rgba(21, 21, 21, 0.64);
  line-height: 1.82;
}

.keyword-section {
  min-height: 118vh;
  padding-left: 0;
  padding-right: 0;
}

.keyword-stage {
  position: relative;
  z-index: 2;
  min-height: 78vh;
  margin-top: 42px;
  overflow: hidden;
}

.keyword-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(21, 21, 21, 0.16) 1.4px, transparent 1.4px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 34% 24%, black 0 24rem, transparent 44rem);
  pointer-events: none;
}

.keyword-copy {
  position: absolute;
  left: 34vw;
  top: 16%;
  z-index: 4;
  width: min(520px, 42vw);
}

.keyword-copy span {
  position: absolute;
  left: -34vw;
  top: 0.3em;
  color: rgba(21, 21, 21, 0.18);
  font-family: var(--mono);
  font-size: 18px;
}

.keyword-copy h3 {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: clamp(42px, 4.6vw, 82px);
  line-height: 0.92;
  letter-spacing: -0.06em;
}

.keyword-copy p {
  margin: 0;
  color: rgba(21, 21, 21, 0.68);
  font-size: clamp(17px, 1.5vw, 22px);
  font-weight: 700;
  line-height: 1.78;
}

.keyword-letter {
  position: absolute;
  z-index: 3;
  border: 0;
  background: transparent;
  color: rgba(21, 21, 21, 0.18);
  font-size: clamp(88px, 11vw, 190px);
  font-weight: 950;
  line-height: 0.8;
  letter-spacing: -0.12em;
  cursor: pointer;
  transition: color 320ms ease, opacity 320ms ease, filter 320ms ease, transform 320ms ease;
}

.keyword-letter:hover,
.keyword-letter.is-active {
  color: var(--accent);
  opacity: 1;
  filter: blur(0);
  transform: scale(1.04);
}

.keyword-letter:not(.is-active) {
  filter: blur(2px);
}

.keyword-letter-a { left: 20vw; top: 18%; }
.keyword-letter-b { left: 22vw; bottom: 9%; color: rgba(21, 21, 21, 0.12); }
.keyword-letter-c { right: 13vw; bottom: 10%; color: rgba(21, 21, 21, 0.18); }
.keyword-letter-d { right: 26vw; top: 53%; color: rgba(21, 21, 21, 0.15); }
.keyword-letter-e { right: 14vw; top: 16%; color: rgba(21, 21, 21, 0.12); }
.keyword-letter-f { left: 48vw; bottom: 30%; color: rgba(21, 21, 21, 0.1); }

.carousel {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 440px;
  margin-top: 58px;
  perspective: 1100px;
}

.skill-track {
  position: relative;
  width: min(720px, 72vw);
  height: 370px;
  transform-style: preserve-3d;
}

.skill-card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(30px, 5vw, 72px);
  border-radius: 10px;
  opacity: 0;
  transform: translateX(0) scale(0.86);
  transition: transform 550ms cubic-bezier(0.16, 1, 0.3, 1), opacity 550ms ease;
}

.skill-card span,
.work-card span,
.tool-card em {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(21, 21, 21, 0.1);
  color: rgba(21, 21, 21, 0.43);
  font-family: var(--mono);
  font-size: 11px;
  font-style: normal;
  letter-spacing: 0.12em;
}

.skill-card.active { opacity: 1; transform: translateX(0) rotateY(0) scale(1); }
.skill-card.prev-card { opacity: 0.34; transform: translateX(-64%) rotateY(42deg) scale(0.76); }
.skill-card.next-card { opacity: 0.34; transform: translateX(64%) rotateY(-42deg) scale(0.76); }

.arrow {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.42);
  color: var(--accent);
  font-size: 42px;
  cursor: pointer;
  box-shadow: 0 12px 48px rgba(21, 21, 21, 0.06);
}

.prev { margin-right: 38px; }
.next { margin-left: 38px; }

.capability-section {
  min-height: 100vh;
  padding-bottom: 12vh;
}

.ability-stack-container {
  position: relative;
  z-index: 3;
  width: min(620px, 82vw);
  height: 460px;
  margin: 76px auto 0;
  perspective: 1200px;
  touch-action: none;
}

.ability-card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(36px, 5vw, 76px);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 28px 92px rgba(21, 21, 21, 0.08);
  cursor: grab;
  user-select: none;
  transform-origin: 90% 90%;
  transition: transform 620ms cubic-bezier(0.16, 1, 0.3, 1), opacity 420ms ease, box-shadow 420ms ease;
  will-change: transform;
}

.ability-card.is-dragging {
  cursor: grabbing;
  transition: none;
  box-shadow: 0 42px 110px rgba(255, 87, 34, 0.2);
}

.ability-card h3 {
  margin: 14px 0 18px;
  font-size: clamp(34px, 4vw, 58px);
  letter-spacing: -0.06em;
}

.ability-card p {
  max-width: 860px;
  font-size: clamp(16px, 1.4vw, 20px);
}

.ability-card span {
  display: block;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(21, 21, 21, 0.1);
  color: rgba(21, 21, 21, 0.43);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.scroll-stack-scroller {
  position: relative;
  z-index: 2;
  width: min(1120px, 86vw);
  margin: 70px auto 0;
  padding-bottom: 48vh;
}

.scroll-stack-inner {
  position: relative;
  min-height: 2050px;
}

.work-card {
  position: relative;
  display: block;
  min-height: 430px;
  margin-bottom: 130px;
  padding: clamp(32px, 5vw, 72px);
  border-radius: 10px;
  transform-origin: top center;
  backface-visibility: hidden;
  will-change: transform, opacity;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: none;
  contain: layout paint;
  transform: translateZ(0);
}

.scroll-stack-end {
  height: 55vh;
}

.tool-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 56px;
}

.tool-card {
  min-height: 260px;
  padding: 24px;
  border-radius: 10px;
}

.tool-card b { float: left; font-size: 32px; }
.tool-card small { float: right; }
.tool-card h3 { clear: both; padding-top: 30px; font-size: 24px; }

.contact {
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  align-items: center;
  gap: 60px;
}

.contact h2 { font-size: clamp(64px, 8.6vw, 142px); }
.contact-list { display: grid; }
.contact-list a,
.contact-list button {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  padding: 24px 0;
  border: 0;
  border-bottom: 1px solid rgba(21, 21, 21, 0.12);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.contact-list span {
  color: rgba(21, 21, 21, 0.38);
  font-family: var(--mono);
  letter-spacing: 0.2em;
}

.contact-list strong {
  font-family: var(--mono);
  font-size: 18px;
  text-align: right;
}

.contact-list a:hover,
.contact-list button:hover { color: var(--accent); }

.footer {
  display: flex;
  justify-content: space-between;
  padding: 30px 6vw;
  border-top: 1px solid rgba(21, 21, 21, 0.08);
  color: rgba(21, 21, 21, 0.42);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(247, 245, 239, 0.72);
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms ease;
  backdrop-filter: blur(16px);
}

.qr-modal.open { opacity: 1; pointer-events: auto; }
.qr-panel {
  position: relative;
  width: min(390px, 92vw);
  padding: 24px;
  border-radius: 10px;
}

.qr-panel button {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(21, 21, 21, 0.12);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  font-size: 26px;
  cursor: pointer;
}

.qr-panel small {
  color: rgba(21, 21, 21, 0.45);
  font-family: var(--mono);
  letter-spacing: 0.2em;
}

.qr-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
  margin: 24px auto 18px;
  border: 18px solid #fff;
  background:
    linear-gradient(90deg, #111 10px, transparent 10px) 0 0 / 24px 24px,
    linear-gradient(#111 10px, transparent 10px) 0 0 / 24px 24px,
    #fff;
  box-shadow: inset 0 0 0 1px rgba(21, 21, 21, 0.1);
}

.qr-placeholder span {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  background: #111;
  color: #fff;
  font-weight: 950;
  letter-spacing: -0.08em;
}

.qr-image-wrap {
  max-width: 330px;
  border: 0;
  background: #fff;
  overflow: hidden;
}

.qr-image-wrap img {
  display: block;
  width: 100%;
  height: auto;
}

.qr-panel p { text-align: center; color: rgba(21, 21, 21, 0.5); }

.loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--bg);
  overflow: hidden;
  transition: transform 850ms cubic-bezier(0.76, 0, 0.24, 1), opacity 850ms ease;
}

.loader.done { transform: translateY(-100%); opacity: 0.98; }
.loader-glow {
  position: absolute;
  width: 34vw;
  min-width: 360px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.62), transparent 62%);
  animation: loaderGlow 1.7s ease-in-out infinite;
}

.loader-mark {
  position: relative;
  z-index: 2;
  width: 86px;
  height: 72px;
  filter: drop-shadow(0 0 22px rgba(255, 255, 255, 0.7));
}

.loader-mark span {
  position: absolute;
  bottom: 8px;
  width: 22px;
  height: 64px;
  background: #fff;
}

.loader-mark span:nth-child(1) {
  left: 8px;
  transform: skewX(-31deg);
  clip-path: polygon(0 100%, 46% 0, 100% 0, 54% 100%);
}

.loader-mark span:nth-child(2) {
  right: 8px;
  transform: skewX(31deg);
  clip-path: polygon(0 0, 54% 0, 100% 100%, 46% 100%);
}

.loader-mark span:nth-child(3) {
  left: 34px;
  bottom: 25px;
  width: 30px;
  height: 12px;
}

.loader-word {
  position: absolute;
  bottom: 17vh;
  display: flex;
  gap: 10px;
  font-size: clamp(44px, 8vw, 112px);
  font-weight: 950;
  letter-spacing: -0.08em;
}

.loader-word span { animation: rise 900ms cubic-bezier(0.16, 1, 0.3, 1) both; }
.loader-word span:nth-child(2) { animation-delay: 80ms; }
.loader-word span:nth-child(3) { animation-delay: 160ms; }
.loader-word span:nth-child(4) { animation-delay: 240ms; }
.loader-foot {
  position: absolute;
  bottom: 28px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.15em;
}

.loader-foot i { font-style: normal; animation: blink 1s steps(4) infinite; }

.reveal {
  opacity: 0;
  transform: translateY(42px);
  transition: opacity 800ms ease, transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes marqueeReverse { from { transform: translateX(-50%); } to { transform: translateX(0); } }
@keyframes sheen { 0%, 100% { transform: translateX(-20%); } 50% { transform: translateX(18%); } }
@keyframes float { 0%, 100% { transform: translateY(0) rotate(-1deg); } 50% { transform: translateY(-18px) rotate(1deg); } }
@keyframes scan { 0%, 100% { transform: translateY(0); opacity: 0.2; } 50% { transform: translateY(230%); opacity: 0.75; } }
@keyframes orbitA { to { transform: rotate(342deg); } }
@keyframes orbitB { to { transform: rotate(-332deg); } }
@keyframes chip { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }
@keyframes drawSignature { to { stroke-dashoffset: 0; } }
@keyframes labScan {
  0% { transform: translateY(-52%); opacity: 0; }
  18% { opacity: 0.74; }
  72% { opacity: 0.74; }
  100% { transform: translateY(62%); opacity: 0; }
}
@keyframes nodePulse {
  0%, 100% { transform: scale(0.86); opacity: 0.42; }
  50% { transform: scale(1.18); opacity: 0.8; }
}
@keyframes panelFloat {
  0%, 100% { transform: translateY(0); opacity: 0.34; }
  50% { transform: translateY(-14px); opacity: 0.54; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(36px) scaleY(0.5); }
  to { opacity: 1; transform: translateY(0) scaleY(1); }
}
@keyframes loaderGlow { 0%, 100% { transform: scale(0.92); opacity: 0.55; } 50% { transform: scale(1.12); opacity: 0.28; } }
@keyframes blink { 50% { opacity: 0.2; } }
@keyframes brandSlash {
  0% { opacity: 0; transform: translateY(-50%) rotate(90deg) scaleY(0); }
  45% { opacity: 1; transform: translateY(-50%) rotate(90deg) scaleY(1.6); }
  100% { opacity: 0; transform: translateY(-50%) rotate(90deg) scaleY(0); }
}

@media (max-width: 700px) {
  body.menu-open { overflow: hidden; }
  .site-header { padding: 0 16px; }
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    height: calc(100svh - 72px);
    padding: 20px 24px 40px;
    background: rgba(247, 245, 239, 0.97);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-18px);
    transition: opacity 220ms ease, transform 320ms cubic-bezier(0.16, 1, 0.3, 1), visibility 220ms ease;
  }
  .site-header.menu-open .nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav a {
    padding: 18px 2px;
    border-bottom: 1px solid var(--line);
    font-size: 18px;
    font-weight: 800;
    opacity: 1;
  }
  .lang { margin-left: auto; }
  .menu-toggle {
    display: grid;
    place-content: center;
    margin-left: 8px;
    flex: 0 0 44px;
  }
  .letter-stage,
  .tool-grid,
  .contact { grid-template-columns: 1fr; }
  .hero { min-height: 100svh; padding-bottom: 74px; }
  .hero-meta {
    bottom: 18px;
    max-width: 44vw;
    font-size: 14px;
    line-height: 1.28;
  }
  .hero-meta span { margin-bottom: 5px; font-size: 10px; }
  .hero-meta.left { left: 18px; }
  .hero-meta.right { right: 18px; }
  .hero-meta i { width: 30px; height: 4px; margin-bottom: 8px; }
  .section { padding: 96px 22px; }
  .keyword-section { padding-left: 0; padding-right: 0; }
  .keyword-stage {
    min-height: 680px;
    margin-top: 28px;
  }
  .keyword-copy {
    left: 24px;
    top: 20%;
    width: min(520px, calc(100vw - 48px));
  }
  .keyword-copy span {
    position: static;
    display: block;
    margin-bottom: 12px;
  }
  .keyword-letter-a { left: 52vw; top: 7%; }
  .keyword-letter-b { left: 8vw; bottom: 8%; }
  .keyword-letter-c { right: 7vw; bottom: 8%; }
  .keyword-letter-d { right: 10vw; top: 46%; }
  .keyword-letter-e { right: 8vw; top: 18%; }
  .keyword-letter-f { left: 46vw; bottom: 29%; }
  .ability-stack-container {
    display: block;
    width: calc(100vw - 72px);
    height: 410px;
    min-height: 410px;
    margin-top: 54px;
    touch-action: pan-y;
  }
  .ability-card {
    position: absolute;
    inset: 0;
    min-height: 410px;
    padding: 30px 24px;
    border-radius: 12px;
  }
  .ability-card h3 { font-size: 36px; }
  .ability-card p { font-size: 16px; line-height: 1.65; }
  .hero { padding-left: 18px; padding-right: 18px; }
  .skill-track { width: 74vw; }
  .prev { margin-right: 10px; }
  .next { margin-left: 10px; }
  .arrow { width: 50px; height: 50px; }
  .scroll-stack-scroller {
    width: calc(100vw - 44px);
    margin-top: 48px;
    padding-bottom: 35vh;
  }
  .scroll-stack-inner { min-height: 2100px; }
  .work-card {
    min-height: 360px;
    margin-bottom: 90px;
    padding: 30px 24px;
  }
  .contact > * { min-width: 0; }
  .contact h2 {
    font-size: 48px;
    line-height: 0.94;
  }
  .contact-list,
  .contact-list a,
  .contact-list button { min-width: 0; }
  .contact-list strong {
    max-width: 100%;
    overflow-wrap: anywhere;
  }
}

@media (max-width: 620px) {
  .lang { padding: 10px 14px; }
  .hero-stage { min-height: 56vh; }
  .mg-scene { width: 72vw; }
  .hero-letter { font-size: 34vw; }
  .signature { width: 108vw; }
  .contact-list a,
  .contact-list button { display: block; }
  .contact-list strong { display: block; margin-top: 10px; text-align: left; }
  .skill-card.prev-card,
  .skill-card.next-card { opacity: 0; }
  .carousel { gap: 8px; }
}