:root {
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans: system-ui, -apple-system, "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --ease-out: cubic-bezier(0.05, 0.7, 0.1, 1);
}

html[data-theme="light"] {
  --primary: #8f4c00;
  --on-primary: #ffffff;
  --primary-container: #ffdcc2;
  --on-primary-container: #2e1500;
  --tertiary: #8c494f;
  --tertiary-container: #ffd9dc;
  --on-tertiary-container: #3a0011;
  --surface: #fff8f5;
  --on-surface: #231917;
  --sc-lowest: #ffffff;
  --sc-low: #fef1ea;
  --sc: #f8eae3;
  --sc-high: #f2e4dd;
  --sc-highest: #ecded7;
  --on-surface-var: #53433e;
  --outline: #85736d;
  --outline-var: #d8c2bb;
  --card-hover: var(--sc-lowest);
  --edge: color-mix(in srgb, var(--outline-var) 70%, transparent);
  color-scheme: light;
}

html[data-theme="dark"] {
  --primary: #ffb874;
  --on-primary: #4d2800;
  --primary-container: #7d4a00;
  --on-primary-container: #ffdcc2;
  --tertiary: #ffb2b6;
  --tertiary-container: #8c4950;
  --on-tertiary-container: #ffd9dc;
  --surface: #161211;
  --on-surface: #eeddd7;
  --sc-lowest: #100d0b;
  --sc-low: #1e1917;
  --sc: #26201d;
  --sc-high: #312925;
  --sc-highest: #3d3430;
  --on-surface-var: #d4c0ba;
  --outline: #9f8d86;
  --outline-var: #52443f;
  --card-hover: var(--sc-highest);
  --edge: color-mix(in srgb, #ffffff 11%, transparent);
  color-scheme: dark;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--sans);
  background: var(--surface);
  color: var(--on-surface);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.35s, color 0.35s;
}

::selection { background: var(--primary-container); color: var(--on-primary-container); }

:focus-visible {
  outline: 2.5px solid var(--primary);
  outline-offset: 3px;
  border-radius: 8px;
}

::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--outline);
  border-radius: 99px;
  border: 3px solid var(--surface);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.wrap { max-width: 1160px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 40px); }

.icon {
  width: 24px; height: 24px;
  fill: none; stroke: currentColor;
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
  flex: none;
}
.icon .dot { fill: currentColor; stroke: none; }

html[data-theme="light"] .show-dark { display: none; }
html[data-theme="dark"] .show-light { display: none; }

/* ---------- app bar ---------- */

.app-bar {
  position: fixed; inset-inline: 0; top: 0; z-index: 50;
  padding-top: 10px;
  pointer-events: none;
}
.bar-inner {
  pointer-events: auto;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: background-color 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
}
.app-bar.scrolled .bar-inner {
  background: color-mix(in srgb, var(--sc) 84%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border-color: var(--edge);
  box-shadow: 0 16px 44px -22px color-mix(in srgb, #000 45%, transparent);
}

.bar-inner {
  display: flex; align-items: center; gap: 28px;
  height: 68px;
}

.brand {
  display: flex; align-items: center; gap: 11px;
  font-family: var(--serif); font-weight: 700; font-size: 19px;
  letter-spacing: 0.02em;
}
.brand img { border-radius: 8px; }
.brand em {
  font-family: var(--sans); font-style: normal; font-weight: 500;
  font-size: 12px; color: var(--on-surface-var); letter-spacing: 0.05em;
  margin-left: 2px;
}

.bar-nav { display: flex; gap: 6px; margin-inline: auto; }
.bar-nav a {
  padding: 9px 16px; border-radius: 999px;
  font-size: 14.5px; font-weight: 500; color: var(--on-surface-var);
  transition: background-color 0.25s, color 0.25s;
}
.bar-nav a:hover { background: color-mix(in srgb, var(--on-surface) 7%, transparent); color: var(--on-surface); }

.bar-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.bar-link {
  font-size: 14.5px; font-weight: 600; color: var(--primary);
  padding: 8px 14px; border-radius: 999px;
  transition: background-color 0.25s;
}
.bar-link:hover { background: color-mix(in srgb, var(--primary) 9%, transparent); }

.icon-btn {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 999px;
  border: 1px solid var(--outline-var);
  background: transparent; color: var(--on-surface-var);
  cursor: pointer;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s, transform 0.2s;
}
.icon-btn:hover { background: color-mix(in srgb, var(--on-surface) 7%, transparent); color: var(--on-surface); }
.icon-btn:active { transform: scale(0.92); }

/* ---------- buttons ---------- */

.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: 9px;
  height: 48px; padding-inline: 26px;
  border-radius: 18px;
  font-size: 15px; font-weight: 600; letter-spacing: 0.01em;
  transition: transform 0.2s var(--ease), box-shadow 0.3s, border-color 0.3s, border-radius 0.4s var(--ease);
}
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: currentColor; opacity: 0;
  transition: opacity 0.3s;
}
.btn:hover::after { opacity: 0.09; }
.btn:active { transform: scale(0.97); border-radius: 999px; }
.btn.lg { height: 54px; padding-inline: 32px; font-size: 16px; border-radius: 22px; }

.btn.filled { background: var(--primary); color: var(--on-primary); }
.btn.tonal { background: var(--primary-container); color: var(--on-primary-container); }
.btn.outlined { border: 1px solid var(--outline); color: var(--primary); }
.btn .icon { width: 19px; height: 19px; }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  align-items: center; gap: clamp(32px, 5vw, 72px);
  padding-top: clamp(56px, 9vh, 110px);
  padding-bottom: clamp(48px, 7vh, 88px);
  min-height: min(92vh, 880px);
}

.eyebrow {
  font-size: 13.5px; font-weight: 600; letter-spacing: 0.14em;
  color: var(--primary); margin-bottom: 18px;
}

h1 {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(64px, 10vw, 108px);
  line-height: 1.08; letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.lead {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(19px, 2.2vw, 24px); line-height: 1.5;
  margin-bottom: 14px;
}
.lead strong { color: var(--primary); }

.desc {
  color: var(--on-surface-var); font-size: 15.5px;
  max-width: 46ch; margin-bottom: 34px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-actions.center { justify-content: center; }

.meta {
  margin-top: 22px; font-size: 13px; letter-spacing: 0.06em;
  color: var(--on-surface-var);
}

/* hero visual */

.hero-visual { min-width: 0; width: 100%; contain: inline-size; }

.visual-stage {
  position: relative;
  aspect-ratio: 0.92 / 1;
  max-width: 470px; margin-inline: auto;
  perspective: 1100px;
}

.blob { position: absolute; border-radius: 38% 62% 55% 45% / 45% 40% 60% 55%; }
.blob-a {
  inset: 12% -4% 6% 10%;
  background: var(--primary-container);
  border-radius: 56px 56px 56px 12px;
  animation: drift 9s var(--ease) infinite alternate;
}
.blob-b {
  top: -3%; right: 2%; width: 92px; height: 92px;
  background: var(--tertiary-container);
  border-radius: 50% 50% 50% 12px;
  animation: drift 7s var(--ease) infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translateY(-8px) rotate(-1.2deg); }
  to   { transform: translateY(10px) rotate(1.4deg); }
}

.shot {
  position: absolute; overflow: hidden;
  border-radius: 24px 24px 24px 8px;
  border: 1px solid var(--edge);
  box-shadow: 0 24px 60px -28px color-mix(in srgb, var(--on-surface) 34%, transparent);
  transition: transform 0.6s var(--ease), box-shadow 0.6s;
}
.shot img { width: 100%; height: 100%; object-fit: cover; object-position: top; }

.shot-back {
  left: 0; top: 5%; width: 46%;
  aspect-ratio: 9 / 16.5;
  rotate: -4deg;
  z-index: 1;
}
.shot-main {
  right: 0; bottom: 0; width: 56%;
  aspect-ratio: 9 / 16.8;
  rotate: 1.5deg;
  z-index: 2;
}
.shot-main:hover { box-shadow: 0 32px 70px -26px color-mix(in srgb, var(--on-surface) 42%, transparent); }

.float-chip {
  position: absolute; z-index: 3;
  left: 8%; bottom: 13%;
  display: flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  background: color-mix(in srgb, var(--sc-lowest) 88%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--outline-var);
  border-radius: 999px 999px 999px 6px;
  font-size: 13.5px; font-weight: 600;
  box-shadow: 0 14px 34px -18px color-mix(in srgb, var(--on-surface) 30%, transparent);
}
.float-chip .icon { width: 17px; height: 17px; color: var(--primary); }
.float-chip b { font-variant-numeric: tabular-nums; color: var(--primary); font-size: 15px; }

/* ---------- chip row ---------- */

.chip-row {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  padding-block: 10px 26px;
}
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 20px;
  border: 1px solid var(--outline-var);
  border-radius: 999px;
  background: var(--sc-low);
  font-size: 14px; font-weight: 500; color: var(--on-surface-var);
  transition: transform 0.3s var(--ease), border-color 0.3s, color 0.3s;
}
.chip .icon { width: 16px; height: 16px; color: var(--primary); stroke-width: 2; }
.chip:hover { transform: translateY(-3px); border-color: var(--primary); color: var(--on-surface); }

/* ---------- sections ---------- */

.band-sc { background: var(--sc); border-block: 1px solid var(--outline-var); }
.band-high { background: var(--sc-high); }

.section { padding-block: clamp(76px, 10vw, 132px); }

.section-head { max-width: 640px; margin-bottom: clamp(40px, 5vw, 64px); }

.label {
  font-size: 13px; font-weight: 700; letter-spacing: 0.16em;
  color: var(--primary); margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.label-alt { color: var(--tertiary); }

h2 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.25; letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.section-sub { color: var(--on-surface-var); font-size: 16px; }

/* ---------- bento ---------- */

.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--sc-low);
  border: 1px solid var(--outline-var);
  border-radius: 24px 24px 24px 9px;
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.45s, box-shadow 0.45s, background-color 0.45s, border-radius 0.5s var(--ease);
}
.band-sc .card { background: var(--sc-lowest); }
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--primary) 45%, var(--outline-var));
  box-shadow: 0 22px 44px -30px color-mix(in srgb, var(--on-surface) 36%, transparent);
  background: var(--card-hover);
  border-radius: 24px 24px 24px 26px;
}
.card:active { transform: translateY(-1px) scale(0.995); }

.card.wide { grid-column: span 2; flex-direction: row; }

.card-media {
  overflow: hidden; flex: none;
  border-bottom: 1px solid var(--outline-var);
}
.card-media img {
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  transition: transform 0.9s var(--ease);
}
.card:hover .card-media img { transform: scale(1.045); }

.card:not(.wide) .card-media { aspect-ratio: 4 / 3.4; }
.card.wide .card-media {
  width: 52%;
  aspect-ratio: auto; min-height: 240px;
  border-bottom: 0; border-right: 1px solid var(--outline-var);
}

.media-diagram {
  display: grid; place-items: center;
  background: var(--sc);
}

.diag { width: 76%; display: flex; flex-direction: column; gap: 16px; }
.diag-head {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.05em;
  color: var(--on-surface-var);
}
.diag-badge { color: var(--primary); font-variant-numeric: tabular-nums; }
.diag-row { display: flex; gap: 5px; }
.diag-row i {
  flex: 1; height: clamp(22px, 2.6vw, 32px);
  border-radius: 7px 7px 7px 3px;
  background: var(--primary);
}
.diag-row i.fork {
  background: transparent;
  border: 1.5px dashed var(--tertiary);
}
.diag-foot { font-size: 12.5px; color: var(--on-surface-var); font-variant-numeric: tabular-nums; }
.diag-foot b { color: var(--primary); }

.js .diag-row i {
  opacity: 0.16; transform: scale(0.88);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
  transition-delay: calc(180ms + var(--i, 0) * 65ms);
}
.js .card.in .diag-row i { opacity: 1; transform: none; }
.js .card.in .diag-row i.fork { opacity: 0.55; transform: none; }

.card-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 8px; }

.card-icon {
  width: 46px; height: 46px; padding: 8px;
  border-radius: 14px 14px 14px 5px;
  background: var(--primary-container); color: var(--on-primary-container);
  fill: none; stroke: currentColor; stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
  margin-bottom: 6px;
}

.card h3 {
  font-family: var(--serif); font-weight: 700; font-size: 20px;
  letter-spacing: 0.02em;
}
.card p { font-size: 14.5px; color: var(--on-surface-var); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 10px; }
.tags span {
  font-size: 12px; font-weight: 500;
  padding: 5px 12px; border-radius: 999px;
  background: color-mix(in srgb, var(--primary) 9%, transparent);
  color: var(--primary);
}

/* ---------- tavern ---------- */

.tavern-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}

.asset-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.asset-list li {
  display: flex; align-items: center; gap: 18px;
  padding: 16px 20px;
  border: 1px solid var(--outline-var);
  border-radius: 18px;
  transition: transform 0.35s var(--ease), border-color 0.35s, background-color 0.35s;
}
.asset-list li:hover {
  transform: translateX(6px);
  border-color: color-mix(in srgb, var(--tertiary) 50%, var(--outline-var));
  background: var(--card-hover);
}
.asset-list .icon {
  width: 44px; height: 44px; padding: 11px;
  border-radius: 999px;
  background: var(--tertiary-container); color: var(--on-tertiary-container);
  stroke-width: 1.6;
}
.asset-list h4 { font-size: 16px; font-weight: 700; letter-spacing: 0.01em; }
.asset-list p { font-size: 13.5px; color: var(--on-surface-var); }

.callout {
  background: var(--primary-container);
  color: var(--on-primary-container);
  border-radius: 26px 26px 26px 9px;
  padding: 28px 30px;
}
.callout h3 { font-family: var(--serif); font-size: 21px; font-weight: 700; margin-bottom: 10px; }
.callout p { font-size: 14.5px; opacity: 0.88; margin-bottom: 16px; }

.text-link {
  font-weight: 700; font-size: 14.5px; color: var(--primary);
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.25s;
}
.text-link:hover { border-color: var(--primary); }
.callout .text-link { color: var(--on-primary-container); }
.callout .text-link:hover { border-color: var(--on-primary-container); }

/* ---------- download ---------- */

.download { position: relative; }
.dl-inner { text-align: center; max-width: 620px; margin-inline: auto; }
.dl-inner .section-sub { margin-bottom: 30px; }

.version {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(68px, 11vw, 118px);
  line-height: 1.1; letter-spacing: 0.03em;
  color: var(--primary);
  margin-bottom: 8px;
}

.chips-mini {
  display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 14px;
  margin-top: 34px; font-size: 13.5px; color: var(--on-surface-var);
}
.chips-mini i { width: 4px; height: 4px; border-radius: 99px; background: var(--outline); }

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--outline-var);
  background: var(--sc-low);
  padding-block: 44px;
}

.foot-inner {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px;
}
.foot-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--serif); font-weight: 700;
}
.foot-brand img { border-radius: 7px; }
.foot-note { font-size: 13.5px; color: var(--on-surface-var); margin-inline: auto; }
.foot-nav { display: flex; gap: 4px; }
.foot-nav a {
  font-size: 13.5px; font-weight: 500; color: var(--on-surface-var);
  padding: 6px 12px; border-radius: 999px;
  transition: color 0.25s, background-color 0.25s;
}
.foot-nav a:hover { color: var(--primary); background: color-mix(in srgb, var(--primary) 8%, transparent); }

.beian {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--outline-var);
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 26px;
  font-size: 12.5px; color: var(--on-surface-var);
}
.beian a {
  display: inline-flex; align-items: center; gap: 6px;
  transition: color 0.25s;
}
.beian a:hover { color: var(--primary); }
.beian-icon { width: 15px; height: 15px; display: block; }

/* ---------- motion ---------- */

.rise { opacity: 0; transform: translateY(26px); animation: rise 0.9s var(--ease-out) forwards; animation-delay: calc(var(--d) * 95ms + 80ms); }
@keyframes rise { to { opacity: 1; transform: none; } }

.js .reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: var(--rd, 0ms);
}
.js .reveal.in { opacity: 1; transform: none; }

.tilt { will-change: transform; }
.tilt.tilting { transition: transform 0.09s linear; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal, .rise { opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 1020px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .card.wide { grid-column: span 2; }
  .tavern-grid { grid-template-columns: 1fr 340px; }
}

@media (max-width: 860px) {
  .bar-nav { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; padding-top: 96px; text-align: left; }
  .hero-visual { margin-top: 10px; width: 100%; }
  .visual-stage { max-width: 100%; margin-inline: 0; }
  .tavern-grid { grid-template-columns: 1fr; }
  .shot-back { width: 44%; }
  .shot-main { width: 54%; }
}

@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
  .card.wide { grid-column: span 1; flex-direction: column; }
  .card.wide .card-media { width: 100%; aspect-ratio: 4 / 3.2; border-right: 0; border-bottom: 1px solid var(--outline-var); min-height: 0; }
  .card.slim { flex-direction: row; align-items: flex-start; gap: 14px; padding: 18px 18px 20px; }
  .card.slim .card-icon { width: 38px; height: 38px; padding: 7px; margin: 2px 0 0; flex: none; }
  .card.slim .card-body { padding: 0; gap: 4px; }
  .card.slim h3 { font-size: 17px; }
  .card.slim p { font-size: 13.5px; line-height: 1.65; }
  .card.slim .tags { padding-top: 6px; }
  .bar-link { display: none; }
  .float-chip { left: 0; bottom: 8%; }
  .chip-row { justify-content: flex-start; }
  .desc { font-size: 15px; }
  .hero-actions .btn { flex: 1; justify-content: center; white-space: nowrap; }
  .chips-mini { gap: 10px; font-size: 12px; }
  .foot-nav a { padding: 10px 14px; }
}