:root {
  --sky-top: #7ec8ef;
  --sky-mid: #b8e4f7;
  --sky-bottom: #e8f7fc;
  --sea: #2f9ec4;
  --sea-deep: #1a6f92;
  --sand: #f0c86a;
  --leaf: #3cb86e;
  --coral: #ff7a55;
  --coral-deep: #e85a38;
  --ink: #16384a;
  --ink-soft: #3d6478;
  --foam: #ffffff;
  --panel: rgba(255, 255, 255, 0.72);
  --shadow: 0 24px 60px rgba(26, 111, 146, 0.18);
  --radius: 18px;
  --font-display: "ZCOOL KuaiLe", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 70% 10%, rgba(255, 255, 255, 0.55), transparent 60%),
    linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 28%, var(--sky-bottom) 55%, #c8ebf6 100%);
  overflow-x: hidden;
}

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

.sky-layer {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 255, 255, 0.55) 0 4%, transparent 5%),
    radial-gradient(circle at 22% 12%, rgba(255, 255, 255, 0.4) 0 6%, transparent 7%),
    radial-gradient(circle at 78% 16%, rgba(255, 255, 255, 0.5) 0 5%, transparent 6%);
  animation: drift 18s ease-in-out infinite alternate;
  z-index: 0;
}

.wave-layer {
  pointer-events: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 140px;
  z-index: 0;
  opacity: 0.55;
}

.wave {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 200%;
  height: 120px;
  fill: var(--sea);
}

.wave-1 {
  animation: waveMove 14s linear infinite;
  opacity: 0.35;
}

.wave-2 {
  bottom: -10px;
  fill: var(--sea-deep);
  animation: waveMove 18s linear infinite reverse;
  opacity: 0.28;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.logo-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, #fff6 0 18%, transparent 19%),
    linear-gradient(145deg, #ff9a6b, #ff6b45);
  box-shadow: 0 6px 16px rgba(232, 90, 56, 0.35);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

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

.nav-cta {
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--coral);
  color: var(--foam) !important;
  font-weight: 500;
  box-shadow: 0 8px 20px rgba(255, 122, 85, 0.35);
}

.nav-cta:hover {
  background: var(--coral-deep);
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
  min-height: calc(100vh - 5.5rem);
}

.hero-copy {
  animation: riseIn 0.9s ease both;
}

.brand-lockup {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  color: var(--sea-deep);
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  line-height: 1.15;
  font-weight: 400;
  color: var(--ink);
}

.hero-lead {
  margin: 1.1rem 0 0;
  max-width: 28rem;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: var(--foam);
  box-shadow: 0 12px 28px rgba(232, 90, 56, 0.35);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.8);
  color: var(--ink);
  backdrop-filter: blur(8px);
}

.hero-stage {
  position: relative;
  min-height: 420px;
  animation: riseIn 1.1s 0.15s ease both;
}

.island {
  position: absolute;
  inset: 8% 0 auto;
  display: grid;
  place-items: center;
}

.island-glow {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.65), transparent 70%);
  filter: blur(8px);
  animation: pulse 4.5s ease-in-out infinite;
}

.island-art {
  width: min(100%, 420px);
  height: auto;
  position: relative;
  animation: floatY 5s ease-in-out infinite;
}

.bird {
  animation: birdFly 8s ease-in-out infinite;
}

.bird-b {
  animation-delay: -3s;
}

.float-orb {
  transform-origin: 320px 180px;
  animation: bob 3.2s ease-in-out infinite;
}

.phone-shell {
  position: absolute;
  right: 4%;
  bottom: 4%;
  width: 168px;
  padding: 12px;
  border-radius: 28px;
  background: linear-gradient(160deg, #24485a, #16384a);
  box-shadow: var(--shadow);
  animation: floatY 4.2s 0.4s ease-in-out infinite;
}

.phone-notch {
  width: 56px;
  height: 8px;
  margin: 0 auto 10px;
  border-radius: 999px;
  background: #0d2430;
}

.phone-screen {
  border-radius: 18px;
  padding: 1rem 0.9rem 1.1rem;
  background: linear-gradient(180deg, #eff9ff, #d7f0fb);
  color: var(--ink);
}

.phone-app-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.95rem;
}

.phone-step {
  margin: 0.85rem 0 0.15rem;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.phone-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
}

.phone-bar {
  margin-top: 0.85rem;
  height: 8px;
  border-radius: 999px;
  background: rgba(47, 158, 196, 0.18);
  overflow: hidden;
}

.phone-bar span {
  display: block;
  width: 58%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--sea), var(--leaf));
  animation: progress 2.8s ease-in-out infinite;
}

.phone-dots {
  display: flex;
  gap: 0.35rem;
  margin-top: 0.9rem;
}

.phone-dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(22, 56, 74, 0.18);
}

.phone-dots i.on {
  background: var(--coral);
}

.how {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem 1.5rem 5rem;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2rem;
}

.section-head h2,
.download-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 400;
}

.section-head p,
.download-copy p {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem 2rem;
  counter-reset: none;
}

.steps li {
  padding-top: 0.25rem;
  border-top: 2px solid rgba(26, 111, 146, 0.18);
}

.step-num {
  display: block;
  margin: 0.9rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--sea);
}

.steps h3 {
  margin: 0;
  font-size: 1.15rem;
}

.steps p {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
  font-size: 0.95rem;
}

.download {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

.download-panel {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: stretch;
  padding: 2rem;
  border-radius: calc(var(--radius) + 8px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.45)),
    linear-gradient(120deg, rgba(94, 200, 232, 0.25), rgba(255, 122, 85, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 200px;
  padding: 0.95rem 1.35rem;
  border-radius: 14px;
  background: var(--ink);
  color: var(--foam);
  transition: transform 0.2s ease, background 0.2s ease;
}

.store-btn:hover {
  transform: translateY(-2px);
  background: #0f2a38;
}

.store-btn small {
  display: block;
  font-size: 0.72rem;
  opacity: 0.7;
}

.store-btn strong {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
}

.store-icon {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
}

.trust {
  padding-left: 1.5rem;
  border-left: 1px solid rgba(22, 56, 74, 0.12);
}

.trust-label {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.trust ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.trust li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.1rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.trust li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--leaf);
}

.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(120%);
  z-index: 20;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  background: rgba(22, 56, 74, 0.92);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
  transition: transform 0.35s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes bob {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-8px) scale(1.04); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}

@keyframes waveMove {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(18px); }
}

@keyframes birdFly {
  0%, 100% { transform: translate(0, 0); opacity: 0.9; }
  50% { transform: translate(18px, -10px); opacity: 1; }
}

@keyframes progress {
  0%, 100% { width: 42%; }
  50% { width: 72%; }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 0.5rem;
  }

  .hero-stage {
    min-height: 360px;
    order: -1;
  }

  .steps,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .trust {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid rgba(22, 56, 74, 0.12);
    padding-top: 1.25rem;
  }

  .phone-shell {
    right: 8%;
    width: 148px;
  }
}

@media (max-width: 600px) {
  .nav a:not(.nav-cta) {
    display: none;
  }

  .brand-lockup {
    font-size: 1.55rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-stage {
    min-height: 300px;
  }

  .island-art {
    width: 100%;
  }

  .phone-shell {
    display: none;
  }

  .download-panel {
    padding: 1.35rem;
  }

  .store-btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}