:root {
  --teal: #39c5bb;
  --teal-deep: #137a74;
  --ink: #17233a;
  --mist: #eef6f5;
  --paper: #ffffff;
  --muted: #4d5c6e;
  --round: "M PLUS Rounded 1c", "Noto Sans TC", sans-serif;
  --body: "Noto Sans TC", "PingFang TC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.75 var(--body);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--teal-deep); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, select:focus-visible, .strip:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}
h1, h2, h3 { font-family: var(--round); font-weight: 800; margin: 0; letter-spacing: 0.01em; }
p { margin: 0 0 1em; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Hero: the room at the visitor's time of day */
.hero {
  position: relative;
  min-height: clamp(640px, 100svh, 960px);
  overflow: hidden;
  color: #fff;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: minmax(0, 1fr);
  isolation: isolate;
}
.scene, .scene-img { position: absolute; inset: 0; z-index: -2; }
.scene { transition: transform 0.8s cubic-bezier(.2,.7,.3,1); }
.scene-img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0;
  transition: opacity 1.4s ease;
}
body[data-time="day"] .scene-img[data-for="day"],
body[data-time="dusk"] .scene-img[data-for="dusk"],
body[data-time="night"] .scene-img[data-for="night"] { opacity: 1; }
.hero::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(14, 22, 40, 0.5) 0, rgba(14, 22, 40, 0) 130px),
    linear-gradient(90deg, rgba(14, 22, 40, 0.82) 0%, rgba(14, 22, 40, 0.55) 42%, rgba(14, 22, 40, 0) 70%);
}
.miku-wrap {
  position: absolute;
  right: max(2vw, calc(50% - 600px));
  bottom: -4%;
  height: 96%;
  max-width: 48%;
  z-index: -1;
  transform: translate3d(var(--px, 0px), var(--py, 0px), 0);
  transition: transform 0.6s cubic-bezier(.2,.7,.3,1);
}
.hero-miku {
  height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  object-position: bottom;
  filter: drop-shadow(0 18px 30px rgba(10, 16, 30, 0.45));
  transition: filter 1.4s ease;
  transform-origin: 50% 100%;
  animation: miku-in 1.4s cubic-bezier(.2,.8,.2,1) both, sway 6s ease-in-out 1.4s infinite;
  cursor: pointer;
}
body[data-time="dusk"] .hero-miku { filter: drop-shadow(0 18px 30px rgba(10,16,30,.45)) sepia(.25) saturate(1.1) brightness(.92); }
body[data-time="night"] .hero-miku { filter: drop-shadow(0 18px 30px rgba(0,0,0,.5)) brightness(.64) saturate(.8) hue-rotate(-10deg); }
.hero-miku.poked { animation: poke 0.5s cubic-bezier(.3,1.6,.5,1); }
@keyframes miku-in { from { opacity: 0; transform: translateY(40px) scale(.96); } to { opacity: 1; transform: none; } }
@keyframes sway {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(-0.6deg); }
}
@keyframes poke {
  0% { transform: scale(1); }
  35% { transform: scale(1.03, .97) translateY(4px); }
  70% { transform: scale(.99, 1.02) translateY(-8px); }
  100% { transform: none; }
}

.particles {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
.hero .particles { z-index: 0; }
.topbar, .hero-copy, .dial { position: relative; z-index: 1; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1120px; width: 100%; margin: 0 auto; padding: 20px 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: #fff; text-decoration: none;
  font: 800 19px/1 var(--round);
}
.brand img { border-radius: 8px; }
.toplinks { display: flex; align-items: center; gap: 8px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  height: 38px; padding: 0 14px;
  border-radius: 999px;
  color: #fff; text-decoration: none;
  font: 500 14px/1 var(--body);
  background: rgba(14, 22, 40, .42);
  border: 1px solid rgba(255, 255, 255, .22);
  -webkit-backdrop-filter: blur(12px) saturate(1.3);
  backdrop-filter: blur(12px) saturate(1.3);
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.pill:hover, .lang[open] > .pill { background: rgba(14, 22, 40, .62); border-color: rgba(255, 255, 255, .42); }
.pill svg { flex: none; }

.lang { position: relative; }
.lang > summary { list-style: none; }
.lang > summary::-webkit-details-marker { display: none; }
.lang .chev { opacity: .75; transition: transform .2s; }
.lang[open] .chev { transform: rotate(180deg); }
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 184px; padding: 6px;
  display: grid; gap: 2px;
  border-radius: 14px;
  background: rgba(17, 27, 47, .94);
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transform-origin: top right;
  animation: menu-in .16s ease-out;
}
@keyframes menu-in { from { opacity: 0; transform: translateY(-4px) scale(.97); } }
.lang-menu a {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 10px 12px; border-radius: 9px;
  color: #dfe8f1; text-decoration: none; font: 500 15px/1.2 var(--body);
}
.lang-menu a:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.lang-menu .check { visibility: hidden; color: var(--teal); }
.lang-menu a[aria-current="page"] { color: #fff; font-weight: 700; }
.lang-menu a[aria-current="page"] .check { visibility: visible; }

.gh .stars {
  display: inline-flex; align-items: center; gap: 4px;
  margin-left: 2px; padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, .25);
  font-variant-numeric: tabular-nums;
}
.gh .stars[hidden] { display: none; }
.gh .stars svg { color: #ffd76a; }
.gh .stars b { font-weight: 700; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.hero-copy {
  align-self: center;
  max-width: 1120px; width: 100%; margin: 0 auto; padding: 0 24px;
}
.hero-copy > * { max-width: 30rem; }
.hero-copy > h1 { max-width: none; }
.clock { font-weight: 500; color: #bff0eb; margin-bottom: 14px; }
.hero h1 .line { display: block; }
.hero h1 {
  font-size: clamp(48px, 8.5vw, 104px);
  line-height: 1.04;
  margin-bottom: 26px;
  filter: drop-shadow(0 4px 18px rgba(10, 16, 30, 0.4));
}
.lede { font-size: 19px; color: #e8eef4; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 16px; }
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font: 800 17px/1.2 var(--round);
  text-decoration: none;
}
.btn.primary { background: var(--teal); color: var(--ink); }
.btn.primary:hover { background: #5fd6cd; }
.btn.ghost { color: #fff; box-shadow: inset 0 0 0 2px rgba(255,255,255,.7); }
.btn.ghost:hover { background: rgba(255,255,255,.12); }
.btn.repo { display: inline-flex; align-items: center; gap: 8px; }
.btn.repo svg { flex: none; }
.req { font-size: 14px; color: #c9d4df; }

.dial {
  justify-self: start;
  max-width: 1120px; width: 100%; margin: 0 auto 32px; padding: 0 24px;
  display: flex; gap: 6px;
}
.dial button {
  font: 500 15px/1 var(--body);
  color: #fff;
  background: rgba(14, 22, 40, 0.45);
  border: 1px solid rgba(255,255,255,.35);
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
}
.dial button[aria-pressed="true"] { background: #fff; color: var(--ink); border-color: #fff; }

/* Sections */
.band { padding: 112px 0; }
.two {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 48px;
  align-items: start;
}
h2 { font-size: clamp(30px, 4vw, 44px); line-height: 1.2; }
.prose { max-width: 38rem; color: var(--muted); }

.streets { position: relative; isolation: isolate; overflow: hidden; background: var(--ink); color: #fff; padding: 112px 0 96px; }
.streets .particles { z-index: -1; }
.streets .sub { max-width: 40rem; color: #b7c3d1; margin-top: 18px; }
.strip {
  display: flex; gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 40px max(24px, calc(50% - 536px)) 12px;
  scrollbar-color: var(--teal) transparent;
}
.strip figure { margin: 0; flex: 0 0 min(78vw, 460px); scroll-snap-align: start; }
.strip figure > div, .strip img { border-radius: 14px; }
.strip img {
  aspect-ratio: 16 / 10; width: 100%; object-fit: cover; border-radius: 14px;
  transition: transform .5s cubic-bezier(.2,.7,.3,1), box-shadow .5s;
}
.strip figure:hover img { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(57,197,187,.28); }
.strip figcaption { margin-top: 10px; font-size: 15px; color: #b7c3d1; }

.chat { background: var(--mist); }
.bubbles { display: grid; gap: 10px; margin-bottom: 36px; max-width: 26rem; }
.bubbles p { margin: 0; padding: 12px 18px; border-radius: 20px; max-width: 85%; }
.you { justify-self: end; background: var(--paper); border-bottom-right-radius: 6px; }
.typing { display: none; }
.her { background: var(--teal); color: var(--ink); border-bottom-left-radius: 6px; font-weight: 500; }
.facts { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; max-width: 38rem; color: var(--muted); }
.facts b { color: var(--ink); }

.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; gap: 30px; max-width: 38rem; }
.steps li { counter-increment: s; position: relative; padding-left: 60px; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: -2px;
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--teal); color: var(--ink);
  font: 800 18px/1 var(--round);
}
.steps li::after {
  content: ""; position: absolute; left: 0; top: -2px; width: 40px; height: 40px; border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(57,197,187,.5);
}
.steps.in li::after { animation: ping 1.6s ease-out both; }
.steps.in li:nth-child(2)::after { animation-delay: .25s; }
.steps.in li:nth-child(3)::after { animation-delay: .5s; }
.steps.in li:nth-child(4)::after { animation-delay: .75s; }
@keyframes ping { to { box-shadow: 0 0 0 16px rgba(57,197,187,0); } }
.steps h3 { font-size: 20px; margin-bottom: 4px; }
.steps p { color: var(--muted); margin: 0; }
.install { border-top: 1px solid #dfe8ea; }

.foot { background: var(--ink); color: #b7c3d1; padding: 56px 0; font-size: 14px; line-height: 1.7; }
.foot p { max-width: 52rem; }
.foot b { color: #fff; }
.foot a { color: #8fe3dc; }

/* Live background demo */
.live { background: var(--ink); color: #fff; padding: 24px 0 112px; }
.live .sub { max-width: 40rem; color: #b7c3d1; margin-top: 18px; }
.live-body { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; margin-top: 40px; align-items: start; }
.live-frame {
  position: relative; aspect-ratio: 16 / 10; border-radius: 18px; overflow: hidden;
  background: #0d3149; box-shadow: 0 24px 60px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255,255,255,.08);
}
.live-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.live-controls { display: grid; gap: 22px; }
.live-controls fieldset { border: 0; margin: 0; padding: 0; }
.live-controls legend { font: 800 16px/1 var(--round); margin-bottom: 10px; padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button, .play {
  font: 500 14px/1 var(--body); color: #dfe8f1; cursor: pointer;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.18);
  padding: 9px 14px; border-radius: 999px;
  transition: background .2s, color .2s, border-color .2s;
}
.chips button:hover, .play:hover { background: rgba(255,255,255,.12); }
.chips button[aria-pressed="true"], .play[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); color: var(--ink); font-weight: 700; }
.time-row { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; }
.time-row output { font: 800 18px/1 var(--round); font-variant-numeric: tabular-nums; min-width: 3.2em; text-align: right; }
#live-hour { width: 100%; accent-color: var(--teal); }

/* Page-load sequence for the hero copy */
.js .hero-copy > *, .js .dial, .js .topbar { opacity: 0; transform: translateY(18px); }
.js.ready .hero-copy > *, .js.ready .dial, .js.ready .topbar {
  opacity: 1; transform: none;
  transition: opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1);
}
.js.ready .topbar { transition-delay: .1s; }
.js.ready .hero-copy > :nth-child(1) { transition-delay: .3s; }
.js.ready .hero-copy > :nth-child(2) { transition-delay: .45s; }
.js.ready .hero-copy > :nth-child(3) { transition-delay: .7s; }
.js.ready .hero-copy > :nth-child(4) { transition-delay: .85s; }
.js.ready .hero-copy > :nth-child(5) { transition-delay: 1s; }
.js.ready .dial { transition-delay: 1.15s; }
.hero h1 .line { background: linear-gradient(100deg, #fff 40%, #bff0eb 50%, #fff 60%) 0 0 / 250% 100% no-repeat; -webkit-background-clip: text; background-clip: text; color: transparent; }
.js.ready .hero h1 .line { animation: glint 2.4s ease 1.2s both; }
.js.ready .hero h1 .line + .line { animation-delay: 1.4s; }
@keyframes glint { from { background-position: 100% 0; } to { background-position: 0 0; } }

/* Sections slide in as they scroll into view */
.js .reveal { opacity: 0; transform: translateY(32px); transition: opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1); }
.js .reveal.in { opacity: 1; transform: none; }
.js .facts li { opacity: 0; transform: translateX(-14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in .facts li { opacity: 1; transform: none; }
.js .reveal.in .facts li:nth-child(2) { transition-delay: .12s; }
.js .reveal.in .facts li:nth-child(3) { transition-delay: .24s; }
.js .reveal.in .facts li:nth-child(4) { transition-delay: .36s; }
.js .reveal.in .facts li:nth-child(5) { transition-delay: .48s; }

/* Chat: her reply arrives after a typing indicator */
.js .bubbles .you, .js .bubbles .her { opacity: 0; transform: translateY(10px) scale(.96); transition: opacity .4s ease, transform .4s cubic-bezier(.3,1.4,.5,1); }
.js .bubbles.step1 .you, .js .bubbles.step3 .her { opacity: 1; transform: none; }
.js .bubbles .typing {
  display: none; gap: 5px; align-items: center;
  background: var(--teal); padding: 14px 18px; border-radius: 20px; border-bottom-left-radius: 6px; width: max-content; margin: 0;
}
.js .bubbles.step2:not(.step3) .typing { display: flex; }
.js .bubbles.step3 .typing { display: none; }
.js .bubbles.step3 .her { order: 0; }
.typing span { width: 7px; height: 7px; border-radius: 50%; background: var(--ink); opacity: .35; animation: dot 1s infinite; }
.typing span:nth-child(2) { animation-delay: .15s; }
.typing span:nth-child(3) { animation-delay: .3s; }
@keyframes dot { 50% { opacity: 1; transform: translateY(-3px); } }

.btn.primary { position: relative; overflow: hidden; }
.btn.primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.55) 50%, transparent 70%);
  transform: translateX(-120%);
}
.btn.primary:hover::after { transform: translateX(120%); transition: transform .8s ease; }

@media (max-width: 960px) {
  .live-body { grid-template-columns: 1fr; }
}

@media (max-width: 800px) {
  .live { padding-bottom: 72px; }
  .live-frame { aspect-ratio: 4 / 5; }
  .band, .streets { padding: 72px 0; }
  .two { grid-template-columns: 1fr; gap: 24px; }
  .hero::after { background: linear-gradient(180deg, rgba(14,22,40,.25) 0%, rgba(14,22,40,.75) 55%, rgba(14,22,40,.9) 100%); }
  .miku-wrap { height: 60%; max-width: 90%; right: -12%; bottom: auto; top: 6%; opacity: .9; }
  .hero-copy { align-self: end; padding-top: 300px; }
  .hero { min-height: 100svh; }
  .wrap, .topbar, .hero-copy, .dial { padding-left: 16px; padding-right: 16px; }
  .strip { padding-left: 16px; padding-right: 16px; }
}

@media (max-width: 480px) {
  .topbar { gap: 10px; }
  .brand { gap: 7px; font-size: 16px; white-space: nowrap; }
  .brand img { width: 28px; height: 28px; }
  .toplinks { gap: 6px; }
  .pill { height: 36px; padding: 0 11px; gap: 6px; font-size: 13px; }
}

@media (max-width: 430px) {
  .gh .gh-text, .gh .stars { display: none; }
  .gh { width: 36px; padding: 0; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .lang-menu { animation: none; }
  html { scroll-behavior: auto; }
  .scene-img, .hero-miku, .miku-wrap { transition: none; }
  .hero-miku, .hero h1 .line, .steps li::after, .typing span { animation: none !important; }
  .js .hero-copy > *, .js .dial, .js .topbar, .js .reveal, .js .facts li, .js .bubbles .you, .js .bubbles .her { opacity: 1 !important; transform: none !important; transition: none !important; }
  .js .bubbles .typing { display: none !important; }
}