:root {
  --sky-deep: #4f9ad0;
  --sky-mid: #8fc0e8;
  --sky-soft: #d5ebf8;
  --cloud: #f4f9fd;
  --ink: #243447;
  --ink-soft: #4a5d73;
  --coral: #e86a48;
  --coral-deep: #d45535;
  --gold: #efb02a;
  --line: rgba(36, 52, 71, 0.14);
  --font-display: "Fredoka", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", sans-serif;
  --max: 72rem;
}

html[lang="zh-CN"],
html[data-lang="zh"] {
  --font-display: "ZCOOL KuaiLe", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  background: var(--cloud);
  overflow-x: hidden;
}

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

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

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  margin: 0;
}

p {
  margin: 0;
}

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
  padding: 0.1em 0.35em;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 0.35rem;
}

/* ——— Top bar ——— */

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  background: linear-gradient(
    180deg,
    rgba(244, 249, 253, 0.9),
    rgba(244, 249, 253, 0.45) 72%,
    transparent
  );
  backdrop-filter: blur(8px);
}

.topbar__brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.topbar__right {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  min-width: 0;
}

.topbar__nav {
  display: flex;
  gap: clamp(0.85rem, 2.5vw, 1.75rem);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.topbar__nav a:hover {
  color: var(--ink);
}

.topbar--legal {
  background: rgba(244, 249, 253, 0.92);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.15rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.65);
  flex-shrink: 0;
}

.lang-switch__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.35rem 0.55rem;
  border-radius: 0.55rem;
  cursor: pointer;
  line-height: 1;
}

.lang-switch__btn:hover {
  color: var(--ink);
}

.lang-switch__btn.is-active {
  background: var(--coral);
  color: #fff;
}

@media (max-width: 640px) {
  .topbar__nav {
    display: none;
  }
}

/* ——— Hero: one full-bleed composition ——— */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding:
    calc(5rem + env(safe-area-inset-top, 0px))
    clamp(1.1rem, 5vw, 3.25rem)
    clamp(2rem, 6vw, 3.5rem);
  overflow: hidden;
}

.hero__sky {
  position: absolute;
  inset: 0;
  background: url("assets/hero-sky.png") center top / cover no-repeat;
  z-index: 0;
}

.hero__scene {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero__house {
  position: absolute;
  right: -8%;
  bottom: -4%;
  width: min(78vw, 34rem);
  filter: drop-shadow(0 22px 36px rgba(55, 95, 140, 0.28));
}

.hero__pet {
  position: absolute;
  width: clamp(2.6rem, 7vw, 4.2rem);
  filter: drop-shadow(0 8px 12px rgba(55, 95, 140, 0.2));
}

.hero__pet--a {
  left: 8%;
  top: 22%;
}

.hero__pet--b {
  left: 22%;
  top: 38%;
  width: clamp(2.2rem, 5.5vw, 3.4rem);
}

.hero__pet--c {
  right: 18%;
  top: 18%;
  width: clamp(2rem, 5vw, 3rem);
}

.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(
      100deg,
      rgba(244, 249, 253, 0.78) 0%,
      rgba(244, 249, 253, 0.42) 42%,
      rgba(244, 249, 253, 0.08) 68%,
      transparent 100%
    ),
    linear-gradient(
      180deg,
      transparent 55%,
      rgba(244, 249, 253, 0.55) 100%
    );
  pointer-events: none;
}

.hero__copy {
  position: relative;
  z-index: 3;
  max-width: 34rem;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 9vw, 4.6rem);
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 0.7rem;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
}

.hero__title {
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  color: var(--ink);
  margin-bottom: 0.7rem;
}

.hero__lead {
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 26rem;
  margin-bottom: 1.5rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 900px) {
  .hero {
    align-items: center;
    padding-top: 5.5rem;
  }

  .hero__house {
    right: 2%;
    bottom: 2%;
    width: min(46vw, 36rem);
  }

  .hero__pet--a {
    left: 46%;
    top: 24%;
  }

  .hero__pet--b {
    left: 54%;
    top: 42%;
  }

  .hero__pet--c {
    right: 28%;
    top: 16%;
  }
}

/* ——— Buttons ——— */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.35rem;
  border-radius: 0.85rem;
  font-weight: 700;
  font-size: 0.98rem;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--coral);
  color: #fff;
}

.btn--primary:hover {
  background: var(--coral-deep);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn--ghost:hover {
  background: #fff;
}

/* ——— Sections ——— */

.section {
  position: relative;
  padding: clamp(3.5rem, 8vw, 6.5rem) clamp(1.1rem, 5vw, 3rem);
}

.section__inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section__head {
  max-width: 36rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.section__head h2,
.rescue__copy h2,
.section__inner--cta h2 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin-bottom: 0.7rem;
}

.section__head p,
.rescue__copy p,
.section__inner--cta p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* Play */

.section--play {
  background: linear-gradient(180deg, var(--cloud), rgba(213, 235, 248, 0.7));
}

.play-row {
  display: grid;
  gap: 2.25rem;
  align-items: center;
}

.play-board {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.55rem;
  max-width: 26rem;
}

.play-board img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  animation: pop-in 0.7s ease both;
}

.play-board img:nth-child(2) { animation-delay: 0.05s; }
.play-board img:nth-child(3) { animation-delay: 0.1s; }
.play-board img:nth-child(4) { animation-delay: 0.15s; }
.play-board img:nth-child(5) { animation-delay: 0.2s; }
.play-board img:nth-child(6) { animation-delay: 0.25s; }
.play-board img:nth-child(7) { animation-delay: 0.3s; }
.play-board img:nth-child(8) { animation-delay: 0.35s; }
.play-board img:nth-child(9) { animation-delay: 0.4s; }
.play-board img:nth-child(10) { animation-delay: 0.45s; }

.play-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.play-steps li {
  display: grid;
  gap: 0.25rem;
  padding-left: 1rem;
  border-left: 3px solid var(--sky-deep);
}

.play-steps strong {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
}

.play-steps span {
  color: var(--ink-soft);
}

@media (min-width: 800px) {
  .play-row {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 3rem;
  }
}

/* Rescue */

.section--rescue {
  background:
    linear-gradient(180deg, rgba(143, 192, 232, 0.35), rgba(244, 249, 253, 0.92)),
    url("assets/play-sky.png") center / cover no-repeat;
}

.section__inner--split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.rescue__cast {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: clamp(0.1rem, 1.2vw, 0.55rem);
  min-height: 11rem;
}

.rescue__cast img {
  width: clamp(4.2rem, 12vw, 6.6rem);
  filter: drop-shadow(0 10px 14px rgba(60, 90, 130, 0.18));
  transform-origin: bottom center;
}

.cast--1 { animation: bob 3.6s ease-in-out infinite; }
.cast--2 { animation: bob 3.6s ease-in-out 0.25s infinite; }
.cast--3 { animation: bob 3.6s ease-in-out 0.5s infinite; }
.cast--4 { animation: bob 3.6s ease-in-out 0.75s infinite; }
.cast--5 { animation: bob 3.6s ease-in-out 1s infinite; }

@media (min-width: 860px) {
  .section__inner--split {
    grid-template-columns: 1fr 1.15fr;
  }
}

/* Journey */

.section--journey {
  background: linear-gradient(180deg, var(--cloud), #eaf4fb);
}

.journey-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.journey-rail li {
  position: relative;
  padding: 0 0 0 1.15rem;
  border-left: 2px solid rgba(79, 154, 208, 0.4);
}

.journey-rail__mark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--sky-deep);
  margin-bottom: 0.2rem;
}

.journey-rail p {
  color: var(--ink-soft);
}

@media (min-width: 800px) {
  .journey-rail {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    border-top: 2px solid rgba(79, 154, 208, 0.32);
    padding-top: 1.35rem;
  }

  .journey-rail li {
    border-left: 0;
    padding-left: 0;
  }

  .journey-rail li::before {
    content: "";
    position: absolute;
    top: -1.55rem;
    left: 0;
    width: 0.7rem;
    height: 0.7rem;
    border-radius: 50%;
    background: var(--gold);
  }
}

/* Items */

.section--items {
  background: linear-gradient(180deg, #eaf4fb, var(--sky-soft));
}

.items-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 1rem;
  max-width: 36rem;
}

.items-row li {
  display: grid;
  justify-items: center;
  gap: 0.5rem;
}

.items-row img {
  width: 4.6rem;
  height: 4.6rem;
  object-fit: contain;
}

.items-row span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
}

@media (min-width: 700px) {
  .items-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: none;
  }
}

/* CTA */

.section--cta {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(79, 154, 208, 0.28), transparent 55%),
    linear-gradient(180deg, var(--sky-soft), #cfe4f5);
  text-align: center;
}

.section__inner--cta {
  max-width: 32rem;
}

.section__inner--cta p {
  margin-bottom: 1.5rem;
}

/* Footer */

.footer {
  padding: 1.75rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
  background: #cfe4f5;
  display: grid;
  gap: 0.85rem;
  justify-items: center;
}

.footer__brand {
  font-family: var(--font-display);
  color: var(--ink);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem 1.35rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.footer__links a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}

.footer__links a:hover {
  color: var(--ink);
  border-bottom-color: rgba(36, 52, 71, 0.35);
}

/* ——— Legal pages ——— */

.legal {
  padding:
    calc(5.5rem + env(safe-area-inset-top, 0px))
    clamp(1.1rem, 5vw, 3rem)
    clamp(3rem, 7vw, 5rem);
  background:
    linear-gradient(180deg, rgba(143, 192, 232, 0.28), transparent 18rem),
    var(--cloud);
  min-height: 70svh;
}

.legal__inner {
  width: min(100%, 42rem);
  margin: 0 auto;
}

.legal__back {
  display: inline-block;
  margin-bottom: 1.25rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.legal__back:hover {
  color: var(--ink);
}

.legal h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: 0.45rem;
}

.legal__updated {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 2rem;
}

.legal h2 {
  font-size: 1.35rem;
  margin: 1.75rem 0 0.55rem;
}

.legal p,
.legal li {
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.legal p + p {
  margin-top: 0.75rem;
}

.legal__list {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.55rem;
  color: var(--ink-soft);
}

/* ——— Motion ——— */

.float-soft {
  animation: float-soft 5.5s ease-in-out infinite;
}

.bob-a { animation: bob 4s ease-in-out infinite; }
.bob-b { animation: bob 4.6s ease-in-out 0.4s infinite; }
.bob-c { animation: bob 3.8s ease-in-out 0.8s infinite; }

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes float-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: scale(0.82) translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .float-soft,
  .bob-a,
  .bob-b,
  .bob-c,
  .cast--1,
  .cast--2,
  .cast--3,
  .cast--4,
  .cast--5,
  .play-board img {
    animation: none !important;
  }

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