:root {
  --sky: #d6ecf8;
  --sky-deep: #b9dcf1;
  --snow: #f6fafd;
  --cream: #fdf8ee;
  --paper: #fffdf8;
  --ink: #45362a;
  --ink-soft: #6f5f51;
  --line: #e6dccb;
  --brown: #a8561c;
  --brown-dark: #8a4512;
  --green: #4f7a4a;
  --radius: 22px;
  --shadow: 0 10px 30px rgba(69, 54, 42, .10);
  --wrap: 1120px;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brown); }
a:hover { color: var(--brown-dark); }
h1, h2, h3 { line-height: 1.35; margin: 0 0 .5em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; margin: 0 0 1em; }
li { margin: .25em 0; }

.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }
.hero .wrap > *, .split > *, .games > * { min-width: 0; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(253, 248, 238, .9);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1.15rem; }
.brand img { width: 36px; height: 36px; border-radius: 50%; background: var(--sky); }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { color: var(--ink-soft); text-decoration: none; font-size: .95rem; }
.nav a:hover { color: var(--brown); }
@media (max-width: 760px) { .nav { display: none; } }

/* hero */
.hero {
  background: linear-gradient(180deg, var(--sky) 0%, #e7f3fa 62%, var(--snow) 100%);
  overflow: hidden;
  position: relative;
}
.hero .wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: center; padding: 72px 0 88px; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); letter-spacing: .02em; }
.hero .lead { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--ink-soft); margin-bottom: 1.6em; }
.hero .bear { width: 150px; margin: 0 0 18px -6px; filter: drop-shadow(0 8px 14px rgba(69, 54, 42, .12)); }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px;
  background: var(--paper); border: 2px solid var(--ink);
  font-weight: 600; box-shadow: 0 3px 0 var(--ink);
}
.hero-shot { position: relative; }
.device {
  background: #2b241e; border-radius: 28px; padding: 12px;
  box-shadow: 0 24px 60px rgba(40, 60, 80, .25);
}
.device img { border-radius: 18px; }
.hero .deco { position: absolute; pointer-events: none; }
.hero .deco.pine { width: 110px; left: -40px; bottom: -36px; }
.hero .deco.snowman { width: 96px; right: -26px; bottom: -40px; }
.flakes { position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(circle, #fff 0 3px, transparent 4px),
    radial-gradient(circle, #fff 0 2px, transparent 3px),
    radial-gradient(circle, rgba(255,255,255,.8) 0 2px, transparent 3px);
  background-size: 180px 180px, 120px 140px, 230px 210px;
  background-position: 20px 30px, 70px 90px, 140px 10px;
  opacity: .8;
}
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); padding: 48px 0 72px; }
}

/* plain points under hero */
.points { background: var(--snow); padding: 8px 0 56px; }
.points ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.points li { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; font-weight: 600; margin: 0; }
@media (max-width: 900px) { .points ul { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .points ul { grid-template-columns: 1fr; } }

/* sections */
section.block { padding: 88px 0; }
section.block.alt { background: var(--paper); border-block: 1px solid var(--line); }
.kicker { color: var(--brown); font-weight: 700; letter-spacing: .08em; font-size: .9rem; margin-bottom: .4em; }
.intro { max-width: 720px; color: var(--ink-soft); font-size: 1.08rem; margin-bottom: 40px; }
.split { display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.split.rev { grid-template-columns: 1fr 1.15fr; }
.split.rev > :first-child { order: 2; }
@media (max-width: 900px) {
  .split, .split.rev { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .split.rev > :first-child { order: 0; }
}
.shot { border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); background: #fff; }
.caption { color: var(--ink-soft); font-size: .92rem; margin-top: 10px; }
.checks { list-style: none; padding: 0; }
.checks li { position: relative; padding-left: 30px; margin: .6em 0; }
.checks li::before {
  content: ""; position: absolute; left: 4px; top: .55em; width: 12px; height: 12px;
  border-radius: 50%; background: var(--sky-deep); border: 2px solid var(--ink);
}

/* sample book */
.book { margin-top: 56px; }
.book-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.book-head p { margin: 0; color: var(--ink-soft); }
.book-nav { display: flex; gap: 10px; }
.btn {
  appearance: none; cursor: pointer; font: inherit; font-weight: 700;
  border: 2px solid var(--ink); background: var(--paper); color: var(--ink);
  border-radius: 999px; padding: 8px 18px; box-shadow: 0 3px 0 var(--ink);
  transition: transform .08s, box-shadow .08s;
}
.btn:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.btn.round { width: 46px; height: 46px; padding: 0; font-size: 1.2rem; line-height: 1; }
.pages {
  display: grid; grid-auto-flow: column; grid-auto-columns: min(78%, 720px);
  gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 4px 4px 18px; scrollbar-width: thin;
}
.pages figure { margin: 0; scroll-snap-align: start; }
.pages img { border-radius: 16px; aspect-ratio: 3 / 2; object-fit: cover; width: 100%; box-shadow: var(--shadow); }
.pages figcaption { font-size: .85rem; color: var(--ink-soft); margin-top: 6px; }

/* covers */
.covers { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.covers figure { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.covers img { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }
.covers figcaption { padding: 12px 14px 14px; }
.covers b { display: block; }
.covers span { color: var(--ink-soft); font-size: .85rem; }
@media (max-width: 1000px) { .covers { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 620px) { .covers { grid-template-columns: 1fr 1fr; } }

/* flap demo */
.flap { position: relative; }
.flap img { transition: opacity .35s; }
.flap .open { position: absolute; inset: 0; opacity: 0; }
.flap.is-open .open { opacity: 1; }
.flap-controls { display: flex; align-items: center; gap: 14px; margin-top: 16px; }

/* after reading cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.card img { height: 120px; width: auto; margin-bottom: 14px; }
.card p { color: var(--ink-soft); margin: 0; }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr; } }
.themes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.themes figure { margin: 0; border-radius: var(--radius); padding: 18px 10px 12px; text-align: center; border: 1px solid var(--line); }
.themes img { height: 130px; width: auto; margin: 0 auto 6px; }
.themes .snow { background: linear-gradient(#e3f2fb, #fbfdff); }
.themes .forest { background: linear-gradient(#e3f1dc, #fbfdf7); }
.themes .night { background: linear-gradient(#2f3d63, #56658f); color: #fff; }
.themes .meadow { background: linear-gradient(#fbf1cf, #fffcf0); }
@media (max-width: 620px) { .themes { grid-template-columns: 1fr 1fr; } }
.note { background: var(--sky); border-radius: var(--radius); padding: 16px 22px; margin-top: 28px; }

/* games */
.games { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.games h3 { margin-top: 18px; }
.games p { color: var(--ink-soft); }
@media (max-width: 900px) { .games { grid-template-columns: 1fr; } }
.pill { display: inline-block; background: #e8f3e3; color: var(--green); border-radius: 999px; padding: 2px 12px; font-size: .85rem; font-weight: 700; vertical-align: middle; margin-left: 6px; }
.pill.soon { background: #fbead9; color: var(--brown); }

/* coming soon */
.soon-wrap { background: linear-gradient(180deg, var(--cream), #fbefdc); }
.styles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 26px; }
.styles figure { margin: 0; }
.styles img { border-radius: 14px; aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }
.styles figcaption { text-align: center; font-size: .9rem; margin-top: 6px; font-weight: 600; }
@media (max-width: 900px) { .styles { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 520px) { .styles { grid-template-columns: 1fr 1fr; } }
.options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0 8px; }
.options div { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 18px; }
.options b { display: block; margin-bottom: 4px; }
.options span { color: var(--ink-soft); font-size: .95rem; }
@media (max-width: 760px) { .options { grid-template-columns: 1fr; } }

/* principles table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
th, td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f6efe2; font-size: .95rem; }
tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 600; width: 38%; }
td:last-child { color: var(--ink-soft); }

/* privacy */
.safe { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.safe div { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.safe b { display: block; font-size: 1.05rem; margin-bottom: 6px; }
.safe span { color: var(--ink-soft); }
@media (max-width: 900px) { .safe { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .safe { grid-template-columns: 1fr; } }

/* contact + footer */
.contact { text-align: center; }
.contact img { width: 130px; margin: 0 auto 10px; }
.contact .mail { font-size: 1.3rem; font-weight: 700; }
footer { background: #3d3026; color: #e9dfd2; padding: 44px 0 36px; font-size: .92rem; }
footer a { color: #f3e6d5; }
footer .links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-bottom: 18px; }
footer p { margin: .3em 0; color: #c9bcad; }

/* legal pages */
.doc { padding: 56px 0 88px; }
.doc .wrap { max-width: 820px; }
.doc h1 { font-size: clamp(1.8rem, 3.6vw, 2.4rem); }
.doc h2 { font-size: 1.35rem; margin-top: 2em; }
.doc h3 { font-size: 1.08rem; margin-top: 1.4em; }
.doc .meta { color: var(--ink-soft); background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin-bottom: 28px; }
.doc table td:first-child { width: 26%; }
.doc td, .doc th { padding: 12px 14px; font-size: .95rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .flap img { transition: none; }
}