:root {
  --black: #050505;
  --white: #f5f5f7;
  --gray: #86868b;
  --line-dark: rgba(255, 255, 255, 0.18);
  --line-light: rgba(0, 0, 0, 0.14);
  --blue: #2997ff;
  --topbar-h: 72px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-snap-type: y proximity;
  scroll-padding-top: var(--topbar-h);
}

body {
  margin: 0;
  color: var(--white);
  background: var(--black);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.motion-off *,
body.motion-off *::before,
body.motion-off *::after {
  animation: none !important;
  transition-duration: 0.01ms !important;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--black);
  background: white;
  transform: translateY(-160%);
}

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

.topbar {
  height: var(--topbar-h);
  padding: 0 clamp(22px, 4vw, 64px);
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: white;
  mix-blend-mode: difference;
}

.brand {
  justify-self: start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  gap: clamp(28px, 4vw, 56px);
  font-size: 0.75rem;
  font-weight: 600;
}

.nav-links a { opacity: 0.72; transition: opacity 180ms ease; }
.nav-links a:hover,
.nav-links a:focus-visible { opacity: 1; }

.sound-toggle {
  justify-self: end;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  font-size: 0.72rem;
  cursor: pointer;
}

.sound-bars {
  height: 13px;
  display: flex;
  align-items: center;
  gap: 2px;
}

.sound-bars i {
  width: 2px;
  height: 6px;
  background: currentColor;
  animation: bars 1.1s ease-in-out infinite alternate;
}

.sound-bars i:nth-child(2) { height: 12px; animation-delay: -0.4s; }
.sound-bars i:nth-child(3) { height: 8px; animation-delay: -0.75s; }

@keyframes bars { to { transform: scaleY(0.35); } }

.page-rail {
  width: 28px;
  position: fixed;
  z-index: 90;
  right: clamp(18px, 2.4vw, 38px);
  top: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: white;
  mix-blend-mode: difference;
  transform: translateY(-50%);
}

.rail-count {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 0.62rem;
  line-height: 1;
}

.rail-count b,
.rail-count em { font-weight: 700; font-style: normal; }
.rail-count i { width: 1px; height: 14px; display: block; background: currentColor; opacity: 0.4; }

.rail-track {
  width: 1px;
  height: 72px;
  display: block;
  position: relative;
  background: rgba(255, 255, 255, 0.3);
  overflow: hidden;
}

.rail-track i {
  position: absolute;
  inset: 0 0 auto;
  height: 0;
  background: currentColor;
  transition: height 180ms ease;
}

.snap-page { position: relative; scroll-snap-align: start; overflow: hidden; }
.theme-dark { color: var(--white); background: var(--black); }
.theme-light { color: var(--black); background: var(--white); }

.welcome {
  min-height: 100svh;
  padding: calc(var(--topbar-h) + 5vh) clamp(24px, 6vw, 96px) clamp(30px, 5vw, 72px);
  display: flex;
  flex-direction: column;
  isolation: isolate;
}

.welcome-glow {
  position: absolute;
  z-index: -2;
  width: min(65vw, 980px);
  aspect-ratio: 1;
  left: var(--pointer-x, 55%);
  top: var(--pointer-y, 46%);
  border-radius: 50%;
  background: radial-gradient(circle at 38% 36%, rgba(111, 205, 255, 0.55), transparent 24%), radial-gradient(circle at 66% 58%, rgba(113, 64, 255, 0.55), transparent 30%), radial-gradient(circle, rgba(27, 93, 255, 0.24), transparent 68%);
  filter: blur(44px) saturate(120%);
  opacity: 0.75;
  transform: translate(-50%, -50%) scale(0.9);
  animation: breathe 8s ease-in-out infinite alternate;
  transition: left 1.2s cubic-bezier(0.2, 0.8, 0.2, 1), top 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.welcome-noise {
  position: absolute;
  z-index: -1;
  inset: 0;
  opacity: 0.09;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 140 140' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
  pointer-events: none;
}

@keyframes breathe { to { transform: translate(-50%, -50%) scale(1.08); opacity: 0.94; } }

.welcome-label,
.section-label,
.mini-label,
.case-tag,
.image-caption {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.13em;
}

.welcome-label { color: rgba(255, 255, 255, 0.55); }

.welcome-title {
  margin: auto 0;
  font-size: clamp(4.6rem, 12vw, 13rem);
  font-weight: 650;
  line-height: 0.82;
  letter-spacing: -0.075em;
}

.welcome-title span { display: block; }
.welcome-title span:last-child { margin-top: 0.28em; padding-left: 12vw; font-size: 0.23em; line-height: 1.05; letter-spacing: -0.045em; }

.intro-reveal {
  opacity: 0;
  transform: translateY(38px);
  animation: intro 1.05s cubic-bezier(0.22, 0.84, 0.28, 1) forwards;
}

.welcome-title span:first-child { animation-delay: 130ms; }
.welcome-title span:last-child { animation-delay: 270ms; }
.welcome-footer { animation-delay: 440ms; }

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

.welcome-footer {
  display: grid;
  grid-template-columns: minmax(260px, 460px) auto;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
}

.welcome-footer > p { margin: 0; color: rgba(255, 255, 255, 0.58); font-size: clamp(0.9rem, 1.2vw, 1.08rem); }

.scroll-cue {
  width: 116px;
  height: 116px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 50%;
  font-size: 0.72rem;
  transition: color 240ms ease, background 240ms ease, transform 240ms ease;
}

.scroll-cue svg,
.contact-email svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.scroll-cue:hover,
.scroll-cue:focus-visible { color: var(--black); background: white; transform: scale(1.05); }

.profile { padding: clamp(110px, 12vw, 190px) clamp(24px, 6vw, 96px); }

.profile-inner {
  min-height: 78svh;
  display: grid;
  grid-template-columns: minmax(340px, 1.05fr) minmax(320px, 0.62fr);
  align-items: center;
  gap: clamp(60px, 10vw, 170px);
}

.profile-copy h2 { margin: 22px 0 34px; font-size: clamp(3rem, 6.2vw, 7rem); font-weight: 650; line-height: 0.95; letter-spacing: -0.065em; }
.profile-copy h2 span { color: var(--gray); }
.profile-intro { max-width: 680px; margin: 0; color: #5d5d62; font-size: clamp(1rem, 1.4vw, 1.25rem); line-height: 1.72; }

.profile-facts { max-width: 680px; margin: 54px 0 0; border-top: 1px solid var(--line-light); }
.profile-facts > div { padding: 15px 0; display: grid; grid-template-columns: 110px 1fr; gap: 24px; border-bottom: 1px solid var(--line-light); }
.profile-facts dt { color: var(--gray); font-size: 0.78rem; }
.profile-facts dd { margin: 0; font-size: 0.9rem; font-weight: 550; }
.profile-facts a:hover { color: #0066cc; }

.portrait { margin: 0; }
.portrait-frame { aspect-ratio: 2 / 2.75; position: relative; overflow: hidden; background: #101525; border-radius: 2px; }
.portrait-frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 68%, rgba(0, 0, 0, 0.24)); pointer-events: none; }
.portrait img { width: 100%; height: 100%; display: block; object-fit: cover; transform: scale(1.015); transition: transform 1.1s cubic-bezier(0.2, 0.8, 0.2, 1); }
.portrait:hover img { transform: scale(1.055); }
.portrait figcaption { margin-top: 13px; display: flex; justify-content: space-between; color: var(--gray); font-size: 0.68rem; letter-spacing: 0.08em; }
.portrait figcaption span:first-child { color: var(--black); font-weight: 650; }

.resume-grid { padding-top: clamp(100px, 13vw, 190px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(50px, 8vw, 130px); }
.mini-label { margin-bottom: 22px; color: var(--gray); }
.resume-row { padding: 26px 0 30px; display: grid; grid-template-columns: 136px 1fr; gap: 24px; border-top: 1px solid var(--line-light); }
.resume-row time { color: var(--gray); font-size: 0.72rem; letter-spacing: 0.02em; }
.resume-row h3 { margin: -5px 0 5px; font-size: clamp(1.05rem, 1.7vw, 1.45rem); line-height: 1.25; letter-spacing: -0.025em; }
.resume-row p { margin: 0; color: #68686e; font-size: 0.86rem; }

.skill-band { padding-top: clamp(90px, 12vw, 170px); }
.skill-band ul { margin: 0; padding: 0; border-top: 1px solid var(--black); list-style: none; }
.skill-band li { padding: 26px 0; display: grid; grid-template-columns: 60px minmax(100px, 0.28fr) 1fr; align-items: center; gap: 30px; border-bottom: 1px solid var(--line-light); }
.skill-band li span { color: var(--gray); font-size: 0.7rem; }
.skill-band strong { color: #929297; font-size: clamp(0.95rem, 1.2vw, 1.1rem); font-weight: 500; letter-spacing: 0; }
.skill-band em { color: var(--black); font-style: normal; font-size: clamp(1.25rem, 2.1vw, 1.8rem); font-weight: 650; letter-spacing: -0.03em; }

.work-intro { min-height: 100svh; padding: calc(var(--topbar-h) + 6vh) clamp(24px, 6vw, 96px) clamp(34px, 5vw, 70px); display: flex; flex-direction: column; }
.work-intro .section-label { color: rgba(255, 255, 255, 0.45); }
.work-intro-title { margin: auto 0; font-size: clamp(5rem, 14vw, 14rem); font-weight: 650; line-height: 0.7; letter-spacing: -0.085em; }
.work-intro-title span { display: block; }
.work-intro-title span:last-child { padding-left: 16vw; color: transparent; -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.9); }
.work-intro-footer { display: grid; grid-template-columns: minmax(280px, 520px) auto; align-items: end; justify-content: space-between; gap: 40px; }
.work-intro-footer p { margin: 0; color: rgba(255, 255, 255, 0.55); }
.work-intro-footer span { font-size: 0.7rem; font-weight: 650; letter-spacing: 0.12em; }

.case { min-height: 100svh; padding: clamp(88px, 10vh, 120px) 0 clamp(100px, 11vw, 170px); display: block; overflow: visible; scroll-snap-align: none; }

.case-media { width: min(100%, 1800px); margin: 0 auto; position: relative; overflow: hidden; background: #151515; clip-path: inset(0 0 100% 0); transition: clip-path 1.05s cubic-bezier(0.22, 0.84, 0.28, 1); }
.case-media.is-visible { clip-path: inset(0 0 0 0); }
.theme-light .case-media { background: #eef1f5; }
.case-media img { width: 100%; height: auto; display: block; object-fit: contain; transform: scale(1.001); transition: filter 700ms ease, transform 900ms cubic-bezier(0.22, 0.84, 0.28, 1); }
.case-media.is-visible img { transform: scale(1); }
.case-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(0, 0, 0, 0.48), transparent 28%); pointer-events: none; }
.image-caption { position: absolute; z-index: 2; left: clamp(18px, 3vw, 48px); bottom: clamp(16px, 2.5vw, 38px); padding: 7px 11px; color: white; background: rgba(0, 0, 0, 0.56); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 999px; backdrop-filter: blur(12px); }

.case-copy { width: 100%; max-width: 1440px; margin: clamp(56px, 7vw, 100px) auto clamp(76px, 8vw, 120px); padding: 0 clamp(24px, 6vw, 96px); display: grid; grid-template-columns: minmax(260px, 0.82fr) minmax(360px, 1fr); column-gap: clamp(64px, 10vw, 160px); row-gap: 22px; align-items: start; }

.case-index { margin: 0; grid-column: 1; grid-row: 1; color: var(--gray); font-size: 0.72rem; font-weight: 650; letter-spacing: 0.08em; }
.case-tag { margin: 0; grid-column: 2; grid-row: 1; align-self: end; color: var(--blue); }
.case-copy h2 { margin: 0; grid-column: 1; grid-row: 2 / span 2; font-size: clamp(3.8rem, 7vw, 8rem); font-weight: 650; line-height: 0.82; letter-spacing: -0.07em; }
.case-summary { max-width: 570px; margin: 0; color: rgba(255, 255, 255, 0.58); font-size: clamp(0.94rem, 1.25vw, 1.08rem); line-height: 1.8; }
.theme-light .case-summary { color: #68686e; }
.case-summary { grid-column: 2; grid-row: 2; }

.case-stats { margin: clamp(26px, 4vh, 44px) 0 0; padding-top: 22px; grid-column: 2; grid-row: 3; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; border-top: 1px solid var(--line-dark); }
.theme-light .case-stats { border-color: var(--line-light); }
.case-stats dt { font-size: clamp(1.1rem, 2vw, 1.65rem); font-weight: 650; letter-spacing: -0.04em; }
.case-stats dd { margin: 4px 0 0; color: var(--gray); font-size: 0.7rem; }

.case-points { margin: clamp(26px, 4vh, 44px) 0 0; padding: 0; grid-column: 2; grid-row: 3; border-top: 1px solid var(--line-dark); list-style: none; }
.theme-light .case-points { border-color: var(--line-light); }
.case-points li { padding: 11px 0; border-bottom: 1px solid var(--line-dark); color: rgba(255, 255, 255, 0.7); font-size: 0.82rem; }
.theme-light .case-points li { border-color: var(--line-light); color: #5d5d62; }

.case-reverse .case-index,
.case-reverse .case-copy h2 { grid-column: 2; }
.case-reverse .case-tag,
.case-reverse .case-summary,
.case-reverse .case-stats,
.case-reverse .case-points { grid-column: 1; }

.case-gallery {
  width: 100%;
  margin: 0;
  padding: 0;
  display: block;
}

.case-gallery-header {
  max-width: 1440px;
  margin: 0 auto clamp(24px, 3vw, 42px);
  padding: 0 clamp(24px, 6vw, 96px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--gray);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.12em;
}

.case-gallery-header p { margin: 0; }

.case-gallery img {
  width: min(100%, 1600px);
  height: auto;
  margin: 0 auto;
  display: block;
  background: transparent;
}

.contact { min-height: 100svh; padding: calc(var(--topbar-h) + 6vh) clamp(24px, 6vw, 96px) 32px; display: flex; flex-direction: column; }
.contact > .section-label { color: rgba(255, 255, 255, 0.44); }
.contact-main { margin: auto 0; }
.contact h2 { margin: 0; font-size: clamp(4.2rem, 10vw, 11rem); font-weight: 650; line-height: 0.84; letter-spacing: -0.075em; }
.contact h2 span { color: var(--gray); }
.contact-email { width: max-content; max-width: 100%; margin-top: clamp(42px, 7vh, 80px); padding-bottom: 8px; display: flex; align-items: center; gap: 22px; border-bottom: 1px solid rgba(255, 255, 255, 0.6); font-size: clamp(1rem, 2vw, 1.65rem); transition: color 180ms ease, border-color 180ms ease; }
.contact-email svg { transition: transform 180ms ease; }
.contact-email:hover,
.contact-email:focus-visible { color: var(--blue); border-color: var(--blue); }
.contact-email:hover svg,
.contact-email:focus-visible svg { transform: translateX(7px); }

.site-footer { padding-top: 26px; display: grid; grid-template-columns: 1fr auto 1fr; gap: 30px; border-top: 1px solid var(--line-dark); color: rgba(255, 255, 255, 0.42); font-size: 0.7rem; }
.site-footer p { margin: 0; }
.site-footer a { justify-self: end; color: rgba(255, 255, 255, 0.72); }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity 900ms ease, transform 900ms cubic-bezier(0.22, 0.84, 0.28, 1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 5px; }

@media (max-width: 980px) {
  html { scroll-snap-type: none; }
  .page-rail { display: none; }
  .welcome-title { font-size: clamp(4.3rem, 15vw, 8rem); }
  .profile-inner { grid-template-columns: 1fr minmax(280px, 0.65fr); gap: 52px; }
  .profile-copy h2 { font-size: clamp(3.3rem, 7.6vw, 5.7rem); }
  .case,
  .case-reverse { min-height: auto; padding-top: 92px; padding-bottom: 110px; }
  .case-media { min-height: 0; max-height: none; }
  .case-copy { max-width: 820px; display: block; }
  .case-index { margin-bottom: 42px; }
  .case-tag { margin-bottom: 18px; }
  .case-copy h2 br { display: none; }
  .case-copy h2 { margin-bottom: 30px; }
  .case-summary { max-width: 680px; }
  .case-stats,
  .case-points { margin-top: 34px; }
}

@media (max-width: 720px) {
  :root { --topbar-h: 64px; }
  .topbar { padding: 0 20px; grid-template-columns: 1fr auto; }
  .nav-links { display: none; }
  .welcome { padding-left: 20px; padding-right: 20px; }
  .welcome-title { font-size: clamp(4rem, 23vw, 7rem); line-height: 0.88; }
  .welcome-title span:last-child { margin-top: 0.6em; padding-left: 0; font-size: 0.22em; line-height: 1.3; letter-spacing: -0.02em; }
  .welcome-footer { grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
  .welcome-footer > p { font-size: 0.82rem; }
  .scroll-cue { width: 82px; height: 82px; }
  .scroll-cue span { display: none; }
  .profile { padding: 100px 20px; }
  .profile-inner,
  .resume-grid { grid-template-columns: 1fr; }
  .profile-inner { gap: 64px; }
  .portrait { max-width: 460px; margin: 0 auto; }
  .resume-grid { padding-top: 110px; gap: 72px; }
  .profile-facts > div { grid-template-columns: 90px 1fr; }
  .skill-band li { grid-template-columns: 32px 80px 1fr; gap: 14px; }
  .skill-band strong { font-size: 0.85rem; }
  .skill-band em { font-size: 1rem; line-height: 1.35; }
  .work-intro { padding-left: 20px; padding-right: 20px; }
  .work-intro-title { font-size: clamp(4.4rem, 23vw, 8rem); line-height: 0.78; }
  .work-intro-title span:last-child { padding-left: 0; }
  .work-intro-footer { grid-template-columns: 1fr; }
  .case,
  .case-reverse { padding: 78px 0 92px; }
  .case-copy { padding: 0 20px; }
  .case-gallery-header { padding: 0 20px; }
  .case-copy h2 { font-size: clamp(3.5rem, 16vw, 5.7rem); line-height: 0.88; }
  .case-stats { gap: 12px; }
  .contact { padding: 100px 20px 24px; }
  .contact h2 { font-size: clamp(4rem, 18vw, 7rem); line-height: 0.88; }
  .contact-email { font-size: 0.92rem; gap: 10px; }
  .site-footer { grid-template-columns: 1fr; gap: 8px; }
  .site-footer p:nth-child(2) { display: none; }
  .site-footer a { justify-self: start; margin-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; scroll-snap-type: none; }
  *,
  *::before,
  *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}