:root {
  --ink: #0c1014;
  --ink-soft: #202832;
  --paper: #f0f2ee;
  --paper-deep: #dfe5e1;
  --mint: #c8fff0;
  --sage: #6d8580;
  --rose: #d84d45;
  --blue: #9bb7ca;
  --season-rgb: 200 255 240;
  --line: rgba(23, 21, 28, 0.14);
  --white-line: rgba(247, 241, 234, 0.28);
  --shadow: 0 24px 70px rgba(23, 21, 28, 0.24);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --font-display: "DIN Condensed", "DIN Alternate", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
}

html[data-season="spring"] {
  --mint: #c8fff0;
  --sage: #6d8580;
  --rose: #d84d45;
  --blue: #9bb7ca;
  --season-rgb: 200 255 240;
  --paper: #f0f2ee;
  --paper-deep: #dfe5e1;
}

html[data-season="summer"] {
  --mint: #ffe18a;
  --sage: #5d8066;
  --rose: #e36543;
  --blue: #79bfc4;
  --season-rgb: 255 225 138;
  --paper: #f5f1dd;
  --paper-deep: #e5e2c8;
}

html[data-season="autumn"] {
  --mint: #f0b36d;
  --sage: #82694d;
  --rose: #b84a34;
  --blue: #8aa1a6;
  --season-rgb: 240 179 109;
  --paper: #f3ece0;
  --paper-deep: #dfd0bd;
}

html[data-season="winter"] {
  --mint: #b8ddff;
  --sage: #607489;
  --rose: #9f5d7c;
  --blue: #c6d8ea;
  --season-rgb: 184 221 255;
  --paper: #eef3f7;
  --paper-deep: #dce7ef;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(240, 242, 238, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(240, 242, 238, 0.028) 1px, transparent 1px),
    var(--ink);
  background-size: 48px 48px;
  font-family: var(--font-body);
  letter-spacing: 0;
  overflow-x: hidden;
  transition:
    background-color 0.45s ease,
    color 0.45s ease;
}

.page-wipe {
  position: fixed;
  z-index: 80;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  transform: translateY(105%);
  transition: transform 0.42s var(--ease-out);
}

.page-wipe span {
  position: absolute;
  inset: 0;
  background: var(--ink);
}

.page-wipe span::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--mint);
}

.page-wipe.is-active {
  transform: translateY(0);
}

body::selection {
  color: var(--ink);
  background: var(--mint);
}

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

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 42px;
  color: var(--paper);
  background: rgba(12, 16, 20, 0.76);
  border-bottom: 1px solid rgba(247, 241, 234, 0.18);
  transition:
    background 0.35s ease,
    border-color 0.35s ease,
    transform 0.5s var(--ease-out);
}

.site-header.is-scrolled {
  background: rgba(12, 16, 20, 0.9);
  border-color: rgba(247, 241, 234, 0.28);
}

.brand,
.nav-links,
.header-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
}

.brand-name {
  color: var(--paper);
}

.brand-alias {
  color: rgba(247, 241, 234, 0.62);
  font-family: Georgia, serif;
  font-weight: 500;
}

.time-widget {
  display: grid;
  grid-template-columns: repeat(3, minmax(72px, auto));
  gap: 1px;
  overflow: hidden;
  color: var(--paper);
  background: rgba(247, 241, 234, 0.16);
  border: 1px solid rgba(247, 241, 234, 0.2);
  border-radius: 2px;
}

.time-card {
  display: grid;
  gap: 2px;
  min-width: 78px;
  padding: 6px 10px 7px;
  background: rgba(12, 16, 20, 0.62);
}

.time-label {
  color: rgba(247, 241, 234, 0.52);
  font-size: 0.66rem;
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
}

.time-value {
  color: rgba(247, 241, 234, 0.94);
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.time-date {
  color: rgba(247, 241, 234, 0.48);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.season-card .time-value {
  color: var(--mint);
}

.nav-links {
  gap: 24px;
  font-size: 0.95rem;
}

.header-actions {
  gap: 20px;
}

.language-toggle {
  min-width: 48px;
  height: 34px;
  padding: 0 12px;
  color: var(--paper);
  background: rgba(247, 241, 234, 0.08);
  border: 1px solid rgba(247, 241, 234, 0.26);
  border-radius: 2px;
  cursor: pointer;
  font-weight: 700;
  transition:
    color 0.24s ease,
    background 0.24s ease,
    border-color 0.24s ease,
    transform 0.24s var(--ease-out);
}

.language-toggle:hover {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--mint);
  transform: translateY(-1px);
}

.nav-links a {
  position: relative;
  opacity: 0.82;
  transition: opacity 0.25s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 2px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.season-player {
  --season-accent: var(--mint);
  position: fixed;
  z-index: 32;
  left: 24px;
  bottom: 22px;
  width: min(430px, calc(100vw - 48px));
  color: var(--paper);
  filter: drop-shadow(0 18px 34px rgba(0, 0, 0, 0.3));
  transition: width 0.32s var(--ease-out);
}

.season-player[data-season="spring"] {
  --season-accent: #c8fff0;
}

.season-player[data-season="summer"] {
  --season-accent: #ffe18a;
}

.season-player[data-season="autumn"] {
  --season-accent: #f0b36d;
}

.season-player[data-season="winter"] {
  --season-accent: #b8ddff;
}

.season-shell {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  background: rgba(12, 16, 20, 0.86);
  border: 1px solid rgba(247, 241, 234, 0.18);
  border-radius: 6px;
  backdrop-filter: blur(16px);
  transition:
    border-radius 0.32s var(--ease-out),
    padding 0.32s var(--ease-out);
}

.season-disc,
.season-control,
.season-switcher button {
  display: grid;
  place-items: center;
  border: 0;
  cursor: pointer;
  transition:
    transform 0.22s var(--ease-out),
    background 0.22s ease,
    border-color 0.22s ease,
    color 0.22s ease;
}

.season-disc {
  position: relative;
  width: 54px;
  height: 54px;
  color: var(--paper);
  background:
    radial-gradient(circle at center, rgba(12, 16, 20, 0.92) 0 18%, transparent 19%),
    conic-gradient(from 140deg, var(--season-accent), rgba(247, 241, 234, 0.82), var(--rose), var(--season-accent));
  border-radius: 50%;
  box-shadow: inset 0 0 0 5px rgba(12, 16, 20, 0.38);
}

.season-disc:hover,
.season-control:hover,
.season-switcher button:hover {
  transform: translateY(-1px);
}

.season-disc-core {
  width: 14px;
  height: 14px;
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 50%;
}

.season-player.is-playing .season-disc {
  animation: seasonSpin 9s linear infinite;
}

.season-copy {
  display: grid;
  min-width: 0;
  gap: 8px;
}

.season-title {
  overflow: hidden;
  margin: 0;
  color: rgba(247, 241, 234, 0.93);
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.season-bars {
  display: flex;
  gap: 3px;
  align-items: end;
  height: 14px;
}

.season-bars span {
  width: 3px;
  height: 5px;
  background: var(--season-accent);
  opacity: 0.45;
  transform-origin: bottom;
}

.season-player.is-playing .season-bars span {
  animation: seasonBars 0.9s ease-in-out infinite;
}

.season-player.is-playing .season-bars span:nth-child(2) {
  animation-delay: 0.14s;
}

.season-player.is-playing .season-bars span:nth-child(3) {
  animation-delay: 0.28s;
}

.season-player.is-playing .season-bars span:nth-child(4) {
  animation-delay: 0.42s;
}

.season-controls {
  display: flex;
  gap: 7px;
  align-items: center;
}

.season-control {
  width: 32px;
  height: 32px;
  color: rgba(247, 241, 234, 0.82);
  background: rgba(247, 241, 234, 0.08);
  border: 1px solid rgba(247, 241, 234, 0.14);
  border-radius: 50%;
  font-size: 1.18rem;
  font-weight: 900;
  line-height: 1;
}

.season-control.play {
  width: 38px;
  height: 38px;
  color: var(--ink);
  background: var(--season-accent);
  border-color: var(--season-accent);
  font-size: 0.95rem;
}

.season-switcher {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.season-switcher button {
  min-height: 28px;
  color: rgba(247, 241, 234, 0.62);
  background: rgba(247, 241, 234, 0.06);
  border: 1px solid rgba(247, 241, 234, 0.12);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
}

.season-switcher button.active {
  color: var(--ink);
  background: var(--season-accent);
  border-color: var(--season-accent);
}

.season-player.is-suspended .season-shell {
  border-color: rgba(247, 241, 234, 0.3);
}

.season-player.is-collapsed {
  width: 78px;
}

.season-player.is-collapsed .season-shell {
  grid-template-columns: 54px;
  padding: 10px;
  border-radius: 999px;
}

.season-player.is-collapsed .season-copy,
.season-player.is-collapsed .season-controls,
.season-player.is-collapsed .season-switcher {
  display: none;
}

.icon-play,
.icon-pause {
  position: relative;
  display: grid;
  place-items: center;
}

.icon-play::before,
.icon-pause::before {
  content: "";
  display: block;
}

.icon-play::before {
  width: 0;
  height: 0;
  margin-left: 3px;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 11px solid currentColor;
}

.icon-pause::before {
  width: 14px;
  height: 16px;
  background: linear-gradient(
    90deg,
    currentColor 0 4px,
    transparent 4px 10px,
    currentColor 10px 14px
  );
  border-radius: 1px;
}

@keyframes seasonPulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--season-accent) 36%, transparent);
  }

  50% {
    box-shadow: 0 0 0 8px rgba(247, 241, 234, 0);
  }
}

@keyframes seasonSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes seasonBars {
  0%,
  100% {
    height: 5px;
    opacity: 0.45;
  }

  50% {
    height: 14px;
    opacity: 1;
  }
}

.hero-section {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  color: var(--paper);
  isolation: isolate;
  transition: min-height 0.72s var(--ease-out);
}

.hero-section::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(247, 241, 234, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(247, 241, 234, 0.04) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.75), transparent 68%);
  opacity: 0.42;
}

.hero-bg,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background-image: url("assets/img/yitian-xie-composer-studio-background.jpg");
  background-position: center;
  background-size: cover;
  transform: scale(1.02);
  transform-origin: 48% 44%;
  transition: transform 1.15s var(--ease-out), filter 1.15s var(--ease-out);
}

.hero-overlay {
  background:
    linear-gradient(135deg, rgb(var(--season-rgb) / 0.22), transparent 44%),
    linear-gradient(90deg, rgba(12, 16, 20, 0.92), rgba(12, 16, 20, 0.58) 48%, rgba(12, 16, 20, 0.18)),
    linear-gradient(0deg, rgba(12, 16, 20, 0.92), rgba(12, 16, 20, 0) 42%);
  transition: background 0.45s ease;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 92vh;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 52px;
  align-items: end;
  width: min(1180px, calc(100% - 64px));
  margin: 0 auto;
  padding: 148px 0 78px;
  transition: min-height 0.72s var(--ease-out), padding 0.72s var(--ease-out);
}

body.hero-intro .hero-section {
  min-height: 100vh;
  min-height: 100svh;
}

body.hero-intro .hero-content {
  min-height: 100vh;
  min-height: 100svh;
  padding-bottom: 104px;
}

body.hero-intro .hero-bg {
  animation: heroImageEntrance 1.65s var(--ease-out) both;
  filter: saturate(1.08) contrast(1.04);
}

.hero-copy {
  max-width: 760px;
  opacity: 0;
  transform: translateY(42px);
  animation: fadeUp 1.08s var(--ease-out) 0.24s forwards;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--sage);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero-section .eyebrow,
.music-section .eyebrow,
.contact-section .eyebrow {
  color: var(--mint);
}

h1,
h2,
h3,
h4,
p {
  letter-spacing: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
}

h1 {
  font-size: 6.2rem;
  line-height: 0.9;
}

.hero-title {
  margin: 22px 0 0;
  font-size: 1.22rem;
  color: rgba(247, 241, 234, 0.86);
}

.hero-roman {
  margin: 14px 0 0;
  color: var(--mint);
  font-family: Georgia, serif;
  font-size: 1.08rem;
  font-weight: 700;
}

.hero-text,
.hero-seo {
  max-width: 660px;
  margin: 26px 0 0;
  color: rgba(247, 241, 234, 0.84);
  font-size: 1.12rem;
  line-height: 1.9;
}

.hero-seo {
  margin-top: 14px;
  color: rgba(247, 241, 234, 0.64);
  font-size: 0.98rem;
}

html[lang="en"] .hero-seo,
html[lang="en"] .bio-english {
  display: none;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-weight: 700;
  transition:
    transform 0.28s var(--ease-out),
    box-shadow 0.28s ease,
    background 0.28s ease,
    border-color 0.28s ease;
}

.btn.primary {
  color: var(--ink);
  background: var(--mint);
  box-shadow: 0 10px 28px rgba(199, 231, 221, 0.22);
}

.btn.ghost {
  color: var(--paper);
  border-color: var(--white-line);
  background: rgba(255, 255, 255, 0.08);
}

.btn.ghost.light {
  color: var(--paper);
}

.btn.ghost.dark {
  color: var(--ink);
  border-color: rgba(12, 16, 20, 0.22);
  background: rgba(255, 255, 255, 0.2);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(23, 21, 28, 0.22);
}

.hero-persona {
  align-self: end;
  color: var(--paper);
  opacity: 0;
  transform: translateY(46px);
  animation: fadeUp 1.08s var(--ease-out) 0.48s forwards;
}

.hero-persona img {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border: 1px solid rgba(247, 241, 234, 0.5);
  border-radius: 4px;
  box-shadow: var(--shadow);
}

.hero-persona div {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--white-line);
}

.persona-name {
  margin: 0 0 8px;
  font-weight: 700;
}

.hero-persona p {
  margin: 0;
  color: rgba(247, 241, 234, 0.76);
  line-height: 1.7;
}

.hero-persona p + p {
  margin-top: 8px;
}

.art-credit {
  position: absolute;
  z-index: 2;
  right: 34px;
  bottom: 24px;
  margin: 0;
  padding: 8px 10px;
  color: rgba(247, 241, 234, 0.72);
  background: rgba(12, 16, 20, 0.52);
  border: 1px solid rgba(247, 241, 234, 0.16);
  border-radius: 2px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.art-credit a {
  color: var(--mint);
  font-weight: 700;
  border-bottom: 1px solid rgba(200, 255, 240, 0.45);
}

.section {
  padding: 92px 0;
  scroll-margin-top: 72px;
}

.section-heading,
.focus-grid,
.track-filters,
.player-layout,
.timeline,
.resume-grid {
  width: min(1180px, calc(100% - 64px));
  margin: 0 auto;
}

.section-heading {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 42px;
  border-top: 1px solid currentColor;
  padding-top: 18px;
}

.section-heading h2 {
  font-size: 3.7rem;
  line-height: 0.98;
}

.section-lede {
  max-width: 680px;
  margin: 14px 0 0;
  color: rgba(23, 21, 28, 0.68);
  line-height: 1.85;
}

.intro-section {
  background: var(--paper);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(12, 16, 20, 0.22);
  border: 1px solid rgba(12, 16, 20, 0.22);
}

.focus-item {
  position: relative;
  min-height: 260px;
  padding: 28px;
  background: var(--paper);
  transition:
    transform 0.35s var(--ease-out),
    background 0.35s ease,
    box-shadow 0.35s ease;
}

.focus-item:hover {
  z-index: 1;
  background: #f8faf6;
  transform: translateY(-8px);
  box-shadow: 0 20px 42px rgba(23, 21, 28, 0.12);
}

.focus-item::before,
.project::before,
.resume-block::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 38px;
  height: 3px;
  background: var(--rose);
}

.focus-item span {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--sage);
  font-family: Georgia, serif;
  font-weight: 700;
}

.focus-item h3 {
  margin-bottom: 14px;
  font-size: 1.42rem;
}

.focus-item p {
  margin: 0;
  color: rgba(23, 21, 28, 0.68);
  line-height: 1.85;
}

.music-section {
  color: var(--paper);
  background: var(--ink);
}

.player-layout {
  display: grid;
  grid-template-columns: 420px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.track-filters {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: -14px;
  margin-bottom: 28px;
  isolation: isolate;
}

.track-filter-indicator {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  border-radius: 999px;
  pointer-events: none;
  background: var(--mint);
  border: 1px solid var(--mint);
  box-shadow: 0 12px 26px rgba(199, 231, 221, 0.18);
  transition:
    transform 0.34s var(--ease-out),
    width 0.34s var(--ease-out),
    height 0.34s var(--ease-out),
    background 0.24s ease;
}

.track-filters button {
  position: relative;
  z-index: 1;
  min-height: 34px;
  padding: 0 14px;
  color: rgba(247, 241, 234, 0.7);
  background: rgba(247, 241, 234, 0.06);
  border: 1px solid rgba(247, 241, 234, 0.14);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
  transition:
    transform 0.24s var(--ease-out),
    color 0.24s ease,
    background 0.24s ease,
    border-color 0.24s ease;
}

.track-filters button:hover {
  color: var(--paper);
  background: rgba(247, 241, 234, 0.12);
  border-color: rgba(247, 241, 234, 0.28);
  transform: translateY(-1px);
}

.track-filters button.active {
  color: var(--ink);
  background: transparent;
  border-color: transparent;
  transform: translateY(-1px);
}

.platform-note {
  width: min(1180px, calc(100% - 64px));
  margin: 28px auto 0;
  color: rgba(247, 241, 234, 0.7);
  line-height: 1.8;
}

.platform-note a {
  color: var(--mint);
  font-weight: 700;
}

.now-playing,
.track-card,
.project,
.resume-block {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.now-playing {
  position: sticky;
  top: 96px;
  padding: 30px;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(247, 241, 234, 0.11), rgba(247, 241, 234, 0.04));
  border-color: rgba(247, 241, 234, 0.16);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.now-playing::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(199, 231, 221, 0.18), transparent 38%),
    repeating-linear-gradient(90deg, rgba(247, 241, 234, 0.08) 0 1px, transparent 1px 34px);
  opacity: 0.72;
}

.now-playing h3 {
  min-height: 76px;
  margin-bottom: 12px;
  font-size: 2rem;
  line-height: 1.18;
  position: relative;
}

.now-playing p {
  color: rgba(247, 241, 234, 0.72);
  line-height: 1.7;
  position: relative;
}

.player-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 28px;
}

.play-toggle,
.track-play {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--ink);
  background: var(--mint);
  border: 0;
  cursor: pointer;
  transition:
    transform 0.25s var(--ease-out),
    box-shadow 0.25s ease,
    background 0.25s ease;
}

.play-toggle:hover,
.track-play:hover {
  transform: scale(1.06);
  box-shadow: 0 10px 24px rgba(199, 231, 221, 0.22);
}

.play-toggle {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  font-size: 1.1rem;
}

.timebar {
  display: grid;
  grid-template-columns: 42px minmax(120px, 1fr) 42px;
  gap: 10px;
  align-items: center;
  width: 100%;
  color: rgba(247, 241, 234, 0.72);
  font-size: 0.86rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--mint);
}

.track-list {
  display: grid;
  align-content: start;
  grid-auto-rows: max-content;
  gap: 12px;
  transition: height 0.34s var(--ease-out);
  will-change: height;
}

.track-list.is-switching .track-card:not(.is-hidden) {
  animation: trackFilterCardIn 0.34s var(--ease-out) both;
}

.track-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 92px;
  padding: 18px;
  color: var(--paper);
  background: rgba(247, 241, 234, 0.06);
  border-color: rgba(247, 241, 234, 0.14);
  transform-origin: center;
  transition:
    transform 0.3s var(--ease-out),
    border-color 0.3s ease,
    background 0.3s ease;
}

.track-card:hover {
  transform: translateX(8px);
  border-color: rgba(199, 231, 221, 0.5);
  background: rgba(247, 241, 234, 0.095);
}

.track-card.active {
  border-color: var(--mint);
  background: rgba(199, 231, 221, 0.12);
  transform: translateX(8px);
}

.track-card.is-hidden {
  display: none;
}

.track-play {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.track-title {
  margin: 0 0 6px;
  font-weight: 700;
}

.track-meta {
  margin: 0;
  color: rgba(247, 241, 234, 0.62);
  font-size: 0.92rem;
}

.track-duration {
  color: rgba(247, 241, 234, 0.64);
  font-size: 0.9rem;
  white-space: nowrap;
}

.work-section {
  background:
    linear-gradient(90deg, rgba(12, 16, 20, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(12, 16, 20, 0.06) 1px, transparent 1px),
    var(--paper-deep);
  background-size: 54px 54px;
}

.timeline {
  display: grid;
  gap: 18px;
}

.project {
  display: block;
  padding: 0;
  background: rgba(255, 255, 255, 0.48);
  transition:
    transform 0.35s var(--ease-out),
    border-color 0.35s ease,
    background 0.35s ease,
    box-shadow 0.35s ease;
}

.project:hover {
  transform: translateY(-6px);
  border-color: rgba(119, 135, 102, 0.4);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 22px 54px rgba(23, 21, 28, 0.12);
}

.project summary {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) 72px;
  gap: 24px;
  align-items: center;
  min-height: 118px;
  padding: 28px 30px;
  cursor: pointer;
  list-style: none;
}

.project summary::-webkit-details-marker {
  display: none;
}

.project[open] {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(12, 16, 20, 0.34);
}

.project-date {
  margin: 0;
  color: var(--sage);
  font-weight: 700;
}

.project-main {
  display: grid;
  gap: 7px;
}

.project-title {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.project h3 {
  font-size: 2rem;
}

.role {
  margin: 0;
  color: rgba(23, 21, 28, 0.66);
  font-weight: 700;
}

.project-brief {
  color: rgba(23, 21, 28, 0.62);
  line-height: 1.65;
}

.project-toggle {
  justify-self: end;
  color: rgba(23, 21, 28, 0.62);
  font-weight: 700;
}

.project-toggle::after {
  content: "+";
  display: inline-block;
  margin-left: 10px;
  color: var(--rose);
  font-size: 1.3rem;
  line-height: 1;
}

.project[open] .project-toggle::after {
  content: "-";
}

.project-body {
  padding: 0 30px 30px 244px;
}

.project h4,
.resume-block h4 {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  font-family: inherit;
}

.project li,
.project p,
.resume-block p,
.resume-block li,
.resume-block dd {
  color: rgba(23, 21, 28, 0.74);
  line-height: 1.85;
}

.project ul,
.resume-block ul {
  margin: 0;
  padding-left: 1.2em;
}

.resume-section {
  background:
    linear-gradient(90deg, rgba(12, 16, 20, 0.07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(12, 16, 20, 0.05) 1px, transparent 1px),
    var(--paper);
  background-size: 46px 46px;
}

.resume-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.resume-block {
  padding: 28px;
  background: rgba(255, 255, 255, 0.66);
  transition:
    transform 0.35s var(--ease-out),
    border-color 0.35s ease,
    background 0.35s ease,
    box-shadow 0.35s ease;
}

.resume-block.wide {
  grid-column: 1 / -1;
}

.resume-block:hover {
  transform: translateY(-5px);
  border-color: rgba(70, 109, 115, 0.34);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 18px 42px rgba(23, 21, 28, 0.1);
}

.bio-block {
  grid-column: 1 / -1;
}

.bio-block {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px 44px;
  align-items: start;
  padding: 42px;
  color: var(--paper);
  background:
    linear-gradient(90deg, rgba(216, 77, 69, 0.12), transparent 34%),
    linear-gradient(135deg, rgba(200, 255, 240, 0.12), transparent 45%),
    var(--ink);
  border-color: rgba(240, 242, 238, 0.28);
}

.bio-block h3 {
  grid-column: 1;
  font-size: 2.4rem;
}

.bio-kicker {
  grid-column: 1;
  margin: 0;
  color: var(--mint);
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
}

.bio-block p:not(.bio-kicker) {
  grid-column: 2;
  margin: 0;
  color: rgba(240, 242, 238, 0.82);
  font-size: 1.05rem;
}

.bio-english {
  color: rgba(240, 242, 238, 0.74) !important;
}

.bio-block p + p {
  margin-top: 14px;
}

.bio-block:hover {
  transform: none;
  background:
    linear-gradient(90deg, rgba(216, 77, 69, 0.16), transparent 34%),
    linear-gradient(135deg, rgba(200, 255, 240, 0.14), transparent 45%),
    var(--ink);
  border-color: rgba(240, 242, 238, 0.38);
  box-shadow: 0 18px 42px rgba(12, 16, 20, 0.22);
}

.bio-block:hover p:not(.bio-kicker) {
  color: rgba(240, 242, 238, 0.9);
}

.resume-block h3 {
  margin-bottom: 18px;
  font-size: 1.65rem;
}

.resume-date {
  margin: 0 0 6px;
  color: var(--sage);
  font-weight: 700;
}

.info-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.info-list dt {
  color: rgba(23, 21, 28, 0.52);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.resume-block a {
  color: #466d73;
  font-weight: 700;
}

.skill-list {
  display: grid;
  gap: 12px;
}

.contact-section {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  background: var(--ink);
  scroll-margin-top: 72px;
}

.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(23, 21, 28, 0.9), rgba(23, 21, 28, 0.5)),
    url("assets/img/yitian-xie-composer-studio-background.jpg");
  background-position: center;
  background-size: cover;
  opacity: 0.72;
  transition: transform 1.2s var(--ease-out);
}

.contact-section:hover::before {
  transform: scale(1.04);
}

.contact-inner {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100% - 64px));
  margin: 0 auto;
  padding: 104px 0;
}

.contact-inner h2 {
  max-width: 820px;
  font-size: 3.3rem;
  line-height: 1.14;
}

.contact-inner p {
  max-width: 720px;
  color: rgba(247, 241, 234, 0.78);
  font-size: 1.08rem;
  line-height: 1.9;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s var(--ease-out),
    transform 0.55s var(--ease-out);
}

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

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

@keyframes heroImageEntrance {
  from {
    transform: scale(1.18) translate3d(-28px, -18px, 0);
    filter: saturate(0.92) contrast(0.96);
  }

  to {
    transform: scale(1.1) translate3d(0, 0, 0);
    filter: saturate(1.08) contrast(1.04);
  }
}

@keyframes trackFilterCardIn {
  from {
    opacity: 0.74;
    transform: translateY(6px);
  }

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

@media (max-width: 980px) {
  .site-header {
    flex-wrap: wrap;
    padding: 14px 22px;
  }

  .nav-links {
    gap: 14px;
  }

  .header-actions {
    gap: 14px;
  }

  .time-widget {
    order: 3;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .time-card {
    min-width: 0;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 34px;
    width: min(100% - 36px, 760px);
    padding-top: 168px;
  }

  h1 {
    font-size: 4rem;
  }

  .hero-persona {
    display: flex;
    gap: 18px;
    align-items: center;
  }

  .art-credit {
    right: 18px;
    bottom: 16px;
    max-width: min(420px, calc(100% - 36px));
  }

  .season-player {
    left: 18px;
    bottom: 18px;
    width: min(380px, calc(100vw - 36px));
  }

  .hero-persona img {
    width: 132px;
    height: 132px;
  }

  .hero-persona div {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .section-heading,
  .focus-grid,
  .track-filters,
  .player-layout,
  .timeline,
  .resume-grid,
  .platform-note {
    width: min(100% - 36px, 760px);
  }

  .section-heading,
  .player-layout,
  .project,
  .resume-grid {
    grid-template-columns: 1fr;
  }

  .focus-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .now-playing {
    position: static;
  }

  .project-date {
    grid-row: auto;
  }

  .project summary {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .project-toggle {
    justify-self: start;
  }

  .project-body {
    padding: 0 30px 30px;
  }

  .resume-block.wide {
    grid-column: auto;
  }

  .bio-block {
    grid-template-columns: 1fr;
  }

  .bio-block h3,
  .bio-kicker,
  .bio-block p:not(.bio-kicker) {
    grid-column: 1;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-start;
    font-size: 0.9rem;
  }

  .header-actions {
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
  }

  .time-widget {
    order: 0;
  }

  .time-card {
    padding: 7px 8px;
  }

  .time-value {
    font-size: 0.96rem;
  }

  h1 {
    font-size: 3.1rem;
  }

  .hero-title,
  .hero-text,
  .contact-inner p {
    font-size: 1rem;
  }

  .hero-content {
    padding-top: 218px;
    padding-bottom: 52px;
  }

  .section {
    padding: 72px 0;
  }

  .section-heading {
    gap: 18px;
    margin-bottom: 30px;
  }

  .section-heading h2,
  .contact-inner h2 {
    font-size: 2.32rem;
  }

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

  .focus-item {
    min-height: auto;
  }

  .track-card {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .track-duration {
    grid-column: 2;
  }

  .player-controls {
    align-items: flex-start;
  }

  .timebar {
    grid-template-columns: 38px minmax(0, 1fr) 38px;
  }

  .season-player {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
  }

  .season-player.is-collapsed {
    right: auto;
    width: 70px;
  }

  .season-shell {
    grid-template-columns: 46px minmax(0, 1fr) auto;
    gap: 10px;
  }

  .season-disc {
    width: 46px;
    height: 46px;
  }

  .season-player.is-collapsed .season-shell {
    grid-template-columns: 46px;
  }

  .season-title {
    font-size: 0.92rem;
  }

  .season-control {
    width: 30px;
    height: 30px;
  }

  .season-control.play {
    width: 34px;
    height: 34px;
  }

  .project,
  .resume-block {
    padding: 22px;
  }

  .project {
    padding: 0;
  }

  .project summary {
    min-height: auto;
    padding: 22px;
  }

  .project-body {
    padding: 0 22px 22px;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

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