/* 小孩很忙 — Kids Busy marketing site */
:root {
  --bg: #F7F3EB;
  --bg-warm: #F3EEE8;
  --card: #FFFCF9;
  --ink: #20364F;
  --ink-soft: #3F3A36;
  --secondary: #667486;
  --olive: #526C58;
  --olive-deep: #3F5444;
  --coral: #F46F63;
  --coral-soft: #FCE8E5;
  --amber: #C28831;
  --butter: #FFF0C8;
  --sky: #EEF5FF;
  --plum: #8B7B8E;
  --blue: #668DB8;
  --line: rgba(32, 54, 79, 0.08);
  --shadow: 0 10px 30px rgba(32, 54, 79, 0.06);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Helvetica Neue", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--olive); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--olive-deep); }
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Nav */
.site-header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: saturate(1.2) blur(12px);
  background: rgba(247, 243, 235, 0.86);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 0; gap: 1rem;
}
.brand {
  display: flex; align-items: center; gap: 0.7rem;
  color: inherit; text-decoration: none;
}
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(145deg, var(--butter), var(--coral-soft));
  display: grid; place-items: center;
  box-shadow: inset 0 0 0 1px rgba(244, 111, 99, 0.18);
  font-size: 1.15rem;
}
.brand-text strong { display: block; font-size: 1.05rem; letter-spacing: 0.01em; }
.brand-text span { display: block; font-size: 0.72rem; color: var(--secondary); margin-top: 1px; }
.nav-links { display: flex; align-items: center; gap: 0.35rem 1rem; flex-wrap: wrap; }
.nav-links a { color: var(--secondary); text-decoration: none; font-size: 0.92rem; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--coral); color: #fff !important;
  padding: 0.55rem 0.95rem; border-radius: 999px;
  font-weight: 600; font-size: 0.88rem; text-decoration: none !important;
  box-shadow: 0 8px 18px rgba(244, 111, 99, 0.28);
}
.nav-cta:hover { filter: brightness(0.97); color: #fff !important; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
  border: none; border-radius: 999px; padding: 0.85rem 1.35rem;
  font: inherit; font-weight: 650; cursor: pointer; text-decoration: none !important;
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-coral {
  background: var(--coral); color: #fff !important;
  box-shadow: 0 10px 24px rgba(244, 111, 99, 0.28);
}
.btn-olive {
  background: var(--olive); color: #fff !important;
  box-shadow: 0 10px 24px rgba(82, 108, 88, 0.22);
}
.btn-ghost {
  background: transparent; color: var(--ink) !important;
  border: 1px solid rgba(32, 54, 79, 0.14);
}
.btn-sm { padding: 0.55rem 0.95rem; font-size: 0.88rem; }

/* Hero */
.hero {
  padding: 3.2rem 0 2.4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: -20% -10% auto;
  height: 70%;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(244, 111, 99, 0.14), transparent 55%),
    radial-gradient(ellipse at 80% 10%, rgba(82, 108, 88, 0.12), transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(102, 141, 184, 0.12), transparent 45%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid; gap: 2.2rem; align-items: center;
}
@media (min-width: 880px) {
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; gap: 2.8rem; }
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--butter); color: var(--ink-soft);
  border-radius: 999px; padding: 0.35rem 0.75rem;
  font-size: 0.8rem; font-weight: 600;
  border: 1px solid rgba(194, 136, 49, 0.18);
}
.hero h1 {
  margin: 0.9rem 0 0.7rem;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.18; letter-spacing: -0.02em;
}
.hero .lead {
  margin: 0 0 1.4rem;
  color: var(--secondary);
  font-size: 1.05rem;
  max-width: 36rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-bottom: 1.1rem; }
.hero-note { color: var(--secondary); font-size: 0.85rem; margin: 0; }
.hero-note strong { color: var(--olive); font-weight: 650; }

/* Phone mock */
.phone-wrap { display: grid; place-items: center; }
.phone {
  width: min(100%, 290px);
  aspect-ratio: 9 / 17.5;
  background: linear-gradient(180deg, #2a3f55, #1a2838);
  border-radius: 36px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(32, 54, 79, 0.22), inset 0 0 0 1px rgba(255,255,255,0.08);
  position: relative;
}
.phone-screen {
  height: 100%;
  background: var(--bg);
  border-radius: 26px;
  overflow: hidden;
  padding: 1rem 0.9rem;
  display: flex; flex-direction: column; gap: 0.7rem;
}
.phone-notch {
  width: 88px; height: 18px; border-radius: 999px;
  background: #111; margin: 0 auto 0.35rem;
}
.phone-title { font-size: 0.78rem; color: var(--secondary); }
.phone-h { font-size: 1.05rem; font-weight: 700; margin: 0; color: var(--ink); }
.chip-row { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.chip {
  font-size: 0.68rem; padding: 0.25rem 0.5rem; border-radius: 999px;
  background: var(--sky); color: var(--ink); font-weight: 600;
}
.chip.coral { background: var(--coral-soft); color: #a3453d; }
.chip.olive { background: rgba(82,108,88,0.14); color: var(--olive-deep); }
.mini-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.7rem 0.75rem;
  box-shadow: var(--shadow);
}
.mini-card .meta { font-size: 0.68rem; color: var(--secondary); }
.mini-card .name { font-weight: 700; font-size: 0.88rem; margin: 0.15rem 0; }
.mini-card .place { font-size: 0.72rem; color: var(--olive); }
.timeline-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--coral); display: inline-block; margin-right: 0.35rem;
}

/* Sections */
section { padding: 3.2rem 0; }
.section-head { max-width: 36rem; margin-bottom: 1.6rem; }
.section-head h2 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  letter-spacing: -0.02em;
}
.section-head p { margin: 0; color: var(--secondary); }
.muted-band { background: linear-gradient(180deg, rgba(238,245,255,0.55), transparent); }

/* Cards grid */
.grid-3 {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
.grid-2 {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.2rem;
  box-shadow: var(--shadow);
}
.card .icon {
  width: 44px; height: 44px; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.25rem;
  margin-bottom: 0.85rem;
}
.icon.coral { background: var(--coral-soft); }
.icon.olive { background: rgba(82,108,88,0.14); }
.icon.sky { background: var(--sky); }
.icon.butter { background: var(--butter); }
.icon.plum { background: rgba(139,123,142,0.16); }
.card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--secondary); font-size: 0.95rem; }

/* Feature list */
.feature {
  display: flex; gap: 0.95rem; align-items: flex-start;
}
.feature .icon { margin-bottom: 0; flex-shrink: 0; }

/* CTA band */
.cta-band {
  margin: 1rem 0 2rem;
  background: linear-gradient(135deg, #2a4056, #526C58 70%);
  color: #fff;
  border-radius: 28px;
  padding: 2rem 1.5rem;
  box-shadow: 0 20px 40px rgba(32, 54, 79, 0.18);
  display: grid; gap: 1rem; align-items: center;
}
@media (min-width: 760px) {
  .cta-band {
    grid-template-columns: 1.4fr auto;
    padding: 2.2rem 2rem;
  }
}
.cta-band h2 { margin: 0 0 0.4rem; font-size: 1.45rem; color: #fff; }
.cta-band p { margin: 0; color: rgba(255,255,255,0.82); }
.cta-band .btn-coral { box-shadow: 0 10px 24px rgba(0,0,0,0.18); }

/* Legal / support pages */
.page-hero {
  padding: 2.4rem 0 1.2rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}
.page-hero h1 { margin: 0.4rem 0 0.35rem; font-size: clamp(1.6rem, 3vw, 2.1rem); }
.page-hero .date { color: var(--secondary); margin: 0; font-size: 0.92rem; }
.prose { max-width: 720px; }
.prose h2 {
  font-size: 1.15rem; margin: 1.8rem 0 0.55rem; color: var(--ink);
}
.prose p, .prose li { color: var(--ink-soft); }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: 0.35rem 0; }
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin: 0.65rem 0;
}
.faq summary {
  cursor: pointer; font-weight: 650; color: var(--ink);
}
.faq details[open] summary { margin-bottom: 0.45rem; }
.faq p { margin: 0; color: var(--secondary); font-size: 0.95rem; }
.support-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  text-align: center;
  margin-bottom: 1.2rem;
}
.support-card .big { font-size: 2.4rem; margin-bottom: 0.4rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.4rem;
  margin-top: 2rem;
  color: var(--secondary);
  font-size: 0.9rem;
}
.footer-grid {
  display: flex; flex-wrap: wrap; gap: 1rem 2rem;
  justify-content: space-between; align-items: flex-start;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 0.85rem 1.2rem; }
.footer-links a { color: var(--secondary); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.footer-meta { margin-top: 1.1rem; font-size: 0.82rem; }

/* Utilities */
.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;
}