/* ==========================================================================
   ZenBeads 官网样式 · Design tokens 与隐私页(zenbeads-privacy)保持一致
   暖棕 #6b4f2e / 米色 #faf9f7 / 卡片白 / 圆角 14px
   字体策略：标题/品牌名用霞鹜文楷子集(woff2, 仅中文页有实际字形，
   其他语种自动回退系统字体)；正文全部使用系统字体栈，保证性能。
   ========================================================================== */

/* 霞鹜文楷子集：仅包含本站用到的字形，体积 ~几十 KB；
   原始 TTF 24MB，完整字体不适合 Web 分发。 */
@font-face {
  font-family: "LXGW WenKai";
  src: url("fonts/lxgw-wenkai-subset.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+4E00-9FFF, U+3000-303F, U+FF00-FFEF, U+00B7, U+2014, U+2018-201F, U+2026, U+00A9;
}

:root {
  color-scheme: light;
  --bg: #faf9f7;
  --ink: #2d2a26;
  --ink-soft: #4a453e;
  --muted: #8a8378;
  --brown: #6b4f2e;
  --brown-deep: #4a3620;
  --line: #eee6da;
  --card: #ffffff;
  --wash: #f5efe4;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(90, 70, 40, 0.05);
  --shadow-lift: 0 10px 30px rgba(90, 70, 40, 0.10);
  --font-hand: "LXGW WenKai", "Songti SC", "Noto Serif SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans KR", "Noto Sans Thai", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--brown); }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- a11y skip link ---------- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brown);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  z-index: 100;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  font-family: var(--font-hand);
  font-size: 1.25rem;
  color: var(--brown-deep);
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.brand-latin {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  margin-left: 2px;
}
.lang-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 0.82rem;
}
.lang-switch a {
  text-decoration: none;
  color: var(--muted);
  border-bottom: 1px dashed transparent;
  padding-bottom: 1px;
}
.lang-switch a:hover { color: var(--brown); }
.lang-switch a.cur {
  color: var(--brown);
  font-weight: 700;
  border-bottom: 2px solid var(--brown);
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 64px;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(245, 239, 228, 0.9), transparent 60%),
    radial-gradient(900px 420px at -10% 110%, rgba(238, 230, 218, 0.55), transparent 55%);
}
.hero-inner { position: relative; text-align: center; }
.hero-beads {
  margin: 0 auto 28px;
  width: 132px;
  height: 132px;
  opacity: 0.9;
}
.hero-title {
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(2.6rem, 8vw, 4.2rem);
  color: var(--brown-deep);
  letter-spacing: 0.12em;
  line-height: 1.15;
}
.hero-tagline {
  margin-top: 18px;
  font-size: clamp(1rem, 3.2vw, 1.25rem);
  color: var(--brown);
  letter-spacing: 0.08em;
}
.hero-sub {
  margin: 18px auto 0;
  max-width: 34em;
  font-size: 0.98rem;
  color: var(--ink-soft);
}
.hero-cta { margin-top: 40px; }

/* App Store badge（自绘，官方黑底样式） */
.appstore-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #000;
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  padding: 10px 22px 10px 16px;
  min-height: 56px;
  box-shadow: 0 6px 18px rgba(45, 42, 38, 0.22);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.appstore-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(45, 42, 38, 0.28); }
.appstore-btn:active { transform: translateY(0); }
.appstore-btn .btn-apple { flex: 0 0 auto; }
.appstore-btn .btn-text { display: flex; flex-direction: column; line-height: 1.2; text-align: left; }
.appstore-btn .btn-text small { font-size: 0.68rem; opacity: 0.82; letter-spacing: 0.02em; }
.appstore-btn .btn-text b { font-size: 1.28rem; font-weight: 600; letter-spacing: -0.01em; }

/* ---------- section headings ---------- */
.section-title {
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  color: var(--brown-deep);
  letter-spacing: 0.06em;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
  margin: 10px auto 0;
  max-width: 36em;
}

/* ---------- features ---------- */
.features { padding: 72px 0 24px; }
.feature-grid {
  margin-top: 48px;
  display: grid;
  gap: 56px;
}
.feature {
  display: grid;
  gap: 24px;
  align-items: center;
}
/* first card shown as normal flow; screenshot always on the right column */
.feature-media {
  background: linear-gradient(180deg, #fff, #fdfbf7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px;
  width: min(78vw, 320px);
  justify-self: center;
}
.feature-media img {
  border-radius: 8px;
  width: 100%;
  height: auto;
}
.feature-kicker {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--brown);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
}
.kicker-verb { font-weight: 700; }
.kicker-dot { color: var(--line); }
.feature-name {
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: 1.5rem;
  color: var(--ink);
  margin-top: 6px;
  letter-spacing: 0.04em;
}
.feature-desc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  max-width: 34em;
}

/* ---------- privacy band ---------- */
.privacy-band {
  margin-top: 64px;
  background: var(--wash);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0;
}
.privacy-title {
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(1.3rem, 4.5vw, 1.8rem);
  color: var(--brown-deep);
  text-align: center;
  letter-spacing: 0.05em;
}
.privacy-lead {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}
.privacy-points {
  list-style: none;
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 26px 22px;
}
.privacy-points li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.privacy-points strong {
  color: var(--brown);
  font-size: 1.02rem;
  letter-spacing: 0.03em;
}
.privacy-points span { color: var(--muted); font-size: 0.85rem; line-height: 1.6; }
.privacy-health {
  margin: 30px auto 0;
  max-width: 46em;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

/* ---------- gallery ---------- */
.gallery { padding: 72px 0 8px; overflow: hidden; }
.gal-strip {
  margin-top: 40px;
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 10px 24px 22px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.gal-item {
  flex: 0 0 auto;
  scroll-snap-align: center;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--card);
  padding: 8px;
}
.gal-item img {
  border-radius: 8px;
  height: 300px;
  width: auto;
}
.gal-hint {
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  padding-bottom: 24px;
}

/* ---------- closing ---------- */
.closing {
  padding: 88px 0 72px;
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(245, 239, 228, 0.55));
}
.closing-title {
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(1.4rem, 4.5vw, 1.9rem);
  color: var(--brown-deep);
  letter-spacing: 0.05em;
}
.closing-text {
  margin: 14px auto 36px;
  max-width: 30em;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 44px;
  background: var(--bg);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  text-align: center;
}
.footer-brand { color: var(--muted); font-size: 0.85rem; }
.footer-links { display: flex; gap: 22px; font-size: 0.85rem; }
.footer-links a { color: var(--brown); text-decoration: none; border-bottom: 1px dashed var(--line); padding-bottom: 1px; }
.footer-links a:hover { border-bottom-color: var(--brown); }
.footer-font { color: var(--muted); font-size: 0.78rem; max-width: 46em; }
.footer-font a { color: inherit; }

/* ---------- desktop ---------- */
@media (min-width: 900px) {
  .hero { padding: 96px 0 88px; }
  .feature-grid { gap: 72px; }
  .feature {
    grid-template-columns: minmax(0, 1fr) 400px;
    gap: 56px;
  }
  .feature-media { order: 2; width: 100%; max-width: 400px; }
  .feature-body { padding-right: 8px; }
  .gal-item img { height: 360px; }
}

/* ---------- motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .appstore-btn { transition: none; }
  .appstore-btn:hover { transform: none; }
}