:root {
  --paper: #F7F4EB;
  --paper-aged: #F2EBD9;
  --paper-deep: #EAE0C8;
  --rule: #E5DCBE;
  --ink: #2B2B2B;
  --ink-title: #1A1A1A;
  --ink-soft: #5C5955;
  --ink-faint: #8A847A;
  --cinnabar: #C23531;
  --cinnabar-pressed: #A82824;
  --indigo: #2E4E58;
  --gold: #D4AF37;
  --night: #1E1D1B;
  --night-ink: #D4AF37;
  --shadow: 0 4px 20px -2px rgba(92, 73, 44, 0.08), 0 1px 3px rgba(92, 73, 44, 0.05);
  --shadow-lift: 0 24px 60px -18px rgba(92, 73, 44, 0.35), 0 4px 12px rgba(92, 73, 44, 0.08);
  --radius: 4px;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "Noto Serif CJK SC", serif;
  --container: 1120px;
}

html[lang="zh-TW"] { --serif: "Songti TC", "Noto Serif TC", "Source Han Serif TC", "Noto Serif CJK TC", "PMingLiU", serif; }
html[lang="ja"] { --serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", "Source Han Serif JP", serif; }
html[lang="ko"] { --serif: "AppleMyungjo", "Nanum Myeongjo", "Noto Serif KR", "Source Han Serif KR", "Batang", serif; word-break: keep-all; overflow-wrap: anywhere; }

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at 10% 0%, rgba(234, 224, 200, 0.7), transparent 55%),
    radial-gradient(ellipse at 100% 30%, rgba(226, 190, 160, 0.25), transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { color: var(--ink-title); font-weight: 700; margin: 0; }
p { margin: 0; }

.container { width: min(var(--container), 100% - 40px); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 244, 235, 0.82);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 0.5px solid rgba(212, 175, 55, 0.3);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-size: 19px; font-weight: 700; letter-spacing: 0.12em; color: var(--ink-title); }
.brand-icon { width: 36px; height: 36px; border-radius: 9px; box-shadow: var(--shadow); }
.site-nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.site-nav a { text-decoration: none; color: var(--ink-soft); transition: color 0.2s; }
.site-nav a:hover { color: var(--cinnabar); }
.lang-switcher { display: flex; gap: 2px; padding: 3px; border: 0.5px solid var(--rule); border-radius: 999px; background: rgba(242, 235, 217, 0.6); }
.lang-switcher button {
  font: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 7px 11px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.lang-switcher button:hover { color: var(--cinnabar); }
.lang-switcher button.is-active { background: var(--cinnabar); color: var(--paper); }

/* Buttons */
.seal-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  background: var(--cinnabar);
  color: var(--paper);
  text-decoration: none;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px var(--cinnabar-pressed), inset 0 0 0 3px var(--cinnabar), inset 0 0 0 4px rgba(247, 244, 235, 0.35), 0 10px 24px -10px rgba(162, 40, 36, 0.6);
  transition: transform 0.15s, background 0.2s;
}
.seal-button:hover { background: var(--cinnabar-pressed); }
.seal-button:active { transform: scale(0.97); }
.seal-button.is-pending { cursor: default; letter-spacing: 0.2em; }
.seal-button.is-pending:hover { background: var(--cinnabar); }
.seal-button.is-pending:active { transform: none; }
html[lang="ja"] .seal-button.is-pending, html[lang="ko"] .seal-button.is-pending { letter-spacing: 0.06em; }
.apple-mark { width: 17px; height: 20px; margin-top: -3px; }
.text-link { color: var(--cinnabar); text-decoration: none; font-weight: 600; letter-spacing: 0.04em; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 72px 0 88px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 48px; }
.eyebrow { color: var(--cinnabar); font-size: 16px; letter-spacing: 0.3em; margin-bottom: 20px; }
html[lang="ja"] .eyebrow, html[lang="ko"] .eyebrow { letter-spacing: 0.12em; }
.hero h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.25; letter-spacing: 0.08em; }
html[lang="ja"] .hero h1, html[lang="ko"] .hero h1 { letter-spacing: 0.02em; font-size: clamp(36px, 5vw, 58px); }
.hero-subtitle { margin-top: 24px; font-size: 18px; color: var(--ink-soft); max-width: 30em; line-height: 1.9; }
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px 24px; }
.hero-note { color: var(--ink-faint); font-size: 14px; letter-spacing: 0.08em; }
.hero-visual { position: relative; justify-self: center; }
.hero-seal { position: absolute; left: -44px; bottom: 56px; width: 88px; height: 88px; border-radius: 20px; box-shadow: var(--shadow-lift); transform: rotate(-6deg); }
.hero-column {
  position: absolute;
  top: 96px;
  writing-mode: vertical-rl;
  font-family: "Songti TC", "Noto Serif TC", var(--serif);
  font-size: 17px;
  letter-spacing: 0.5em;
  color: rgba(92, 89, 85, 0.45);
  margin: 0;
  pointer-events: none;
}
.hero-column-left { left: max(16px, calc(50% - 640px)); }
.hero-column-right { right: max(16px, calc(50% - 640px)); top: 140px; }

/* Phone frame */
.phone {
  width: 300px;
  padding: 10px;
  border-radius: 46px;
  background: linear-gradient(145deg, #3a3631, #1c1a17);
  box-shadow: var(--shadow-lift), inset 0 0 0 1.5px rgba(255, 255, 255, 0.08);
}
.phone img { width: 100%; height: auto; border-radius: 37px; background: var(--paper-aged); }
.phone-hero { width: 330px; transform: rotate(2deg); }

/* Stats */
.stats { border-block: 0.5px solid var(--rule); background: rgba(242, 235, 217, 0.55); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 30px 12px; text-align: center; display: flex; flex-direction: column; gap: 4px; }
.stat + .stat { border-left: 0.5px solid var(--rule); }
.stat strong { font-size: 34px; color: var(--cinnabar); letter-spacing: 0.02em; line-height: 1.2; }
.stat span { font-size: 14px; color: var(--ink-soft); letter-spacing: 0.06em; }

/* Section heads */
.section-head { text-align: center; margin-bottom: 64px; }
.kicker { color: var(--cinnabar); font-size: 15px; letter-spacing: 0.4em; margin-bottom: 12px; }
html[lang="ja"] .kicker, html[lang="ko"] .kicker { letter-spacing: 0.16em; }
.section-head h2, .privacy-inner h2, .cta h2 { font-size: clamp(30px, 4vw, 42px); letter-spacing: 0.1em; line-height: 1.35; }
html[lang="ja"] .section-head h2, html[lang="ko"] .section-head h2,
html[lang="ja"] .privacy-inner h2, html[lang="ko"] .privacy-inner h2,
html[lang="ja"] .cta h2, html[lang="ko"] .cta h2 { letter-spacing: 0.03em; }
.section-subtitle { margin: 16px auto 0; max-width: 34em; color: var(--ink-soft); }

/* Fish-tail divider: two inward folds enclosing a caption */
.fishtail { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 18px; color: var(--indigo); font-size: 15px; opacity: 0.8; }
.fishtail::before,
.fishtail::after {
  content: "";
  flex: 0 1 120px;
  height: 9px;
}
.fishtail::before {
  background:
    linear-gradient(to top left, var(--indigo) 50%, transparent 50%) right center / 9px 9px no-repeat,
    linear-gradient(90deg, transparent, var(--indigo)) left center / calc(100% - 9px) 0.5px no-repeat;
}
.fishtail::after {
  background:
    linear-gradient(to top right, var(--indigo) 50%, transparent 50%) left center / 9px 9px no-repeat,
    linear-gradient(270deg, transparent, var(--indigo)) right center / calc(100% - 9px) 0.5px no-repeat;
}

/* Features */
.features { padding: 104px 0 24px; }
.features + .details, .night + .features { padding-top: 104px; }
.feature { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 72px; padding: 32px 0 72px; }
.feature-reverse .feature-media { order: 2; }
.feature-media { display: flex; justify-content: center; position: relative; isolation: isolate; }
.feature-media::before {
  content: "";
  position: absolute;
  inset: 8% 6%;
  border: 1.5px solid rgba(46, 78, 88, 0.18);
  outline: 0.5px solid rgba(46, 78, 88, 0.18);
  outline-offset: -6px;
  border-radius: 2px;
  z-index: -1;
}
.feature-copy { max-width: 30em; }
.feature-kicker { margin-bottom: 18px; }
.seal-mark {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--cinnabar);
  color: var(--cinnabar);
  font-size: 14px;
  letter-spacing: 0.2em;
  border-radius: 2px;
  box-shadow: inset 0 0 0 2px var(--paper), inset 0 0 0 2.5px rgba(194, 53, 49, 0.4);
}
.feature h3 { font-size: clamp(26px, 3vw, 34px); letter-spacing: 0.08em; line-height: 1.35; margin-bottom: 18px; }
html[lang="ja"] .feature h3, html[lang="ko"] .feature h3 { letter-spacing: 0.02em; }
.feature-copy > p { color: var(--ink-soft); font-size: 17px; }
.feature-points { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; }
.feature-points li { position: relative; padding-left: 22px; font-size: 15.5px; }
.feature-points li::before { content: ""; position: absolute; left: 2px; top: 0.72em; width: 7px; height: 7px; border-radius: 50%; background: var(--cinnabar); }

/* Night */
.night {
  margin-top: 40px;
  padding: 64px 0 8px;
  background: radial-gradient(ellipse at 70% 20%, #2b2925, var(--night) 70%);
  color: #CFC6B0;
}
.night .feature h3 { color: var(--night-ink); }
.night .feature-copy > p { color: #B9B09B; }
.night .seal-mark { box-shadow: inset 0 0 0 2px var(--night), inset 0 0 0 2.5px rgba(194, 53, 49, 0.5); }
.night .feature-points li::before { background: var(--gold); }
.night .feature-media::before { border-color: rgba(212, 175, 55, 0.25); outline-color: rgba(212, 175, 55, 0.25); }
.phone-dark { background: linear-gradient(145deg, #4a453d, #11100e); }

/* Details */
.details { padding: 104px 0; background: linear-gradient(transparent, rgba(242, 235, 217, 0.65)); }
.details-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.detail { background: var(--paper-aged); padding: 30px 28px; border-radius: var(--radius); box-shadow: var(--shadow); border: 0.5px solid var(--rule); }
.detail-glyph {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  background: var(--cinnabar);
  color: var(--paper);
  font-size: 22px;
  border-radius: 3px;
  box-shadow: inset 0 1px 2px rgba(120, 20, 15, 0.25);
  font-family: "Songti TC", "Noto Serif TC", var(--serif);
}
.detail h3 { font-size: 19px; letter-spacing: 0.06em; margin-bottom: 8px; }
.detail p { color: var(--ink-soft); font-size: 15px; line-height: 1.8; }

/* Privacy */
.privacy-band { padding: 104px 0; border-block: 0.5px solid var(--rule); background: var(--paper); }
.privacy-inner { text-align: center; max-width: 760px; }
.privacy-desc { margin: 24px auto 0; color: var(--ink-soft); font-size: 17px; }
.privacy-pills { list-style: none; padding: 0; margin: 32px 0; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.privacy-pills li { padding: 8px 18px; border: 0.5px solid var(--indigo); color: var(--indigo); border-radius: 999px; font-size: 15px; letter-spacing: 0.08em; background: rgba(195, 229, 241, 0.18); }

/* Premium */
.premium { padding: 104px 0; }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; max-width: 880px; margin-inline: auto; }
.plan { background: var(--paper-aged); padding: 36px 36px 32px; border-radius: 8px; box-shadow: var(--shadow); border: 0.5px solid var(--rule); }
.plan h3 { display: flex; align-items: center; gap: 12px; font-size: 24px; letter-spacing: 0.12em; margin-bottom: 20px; }
.plan-premium { position: relative; border: 1.5px solid rgba(212, 175, 55, 0.55); outline: 0.5px solid rgba(212, 175, 55, 0.55); outline-offset: -7px; }
.plan-premium h3 { color: var(--cinnabar); }
.plan-badge { font-size: 13px; letter-spacing: 0.08em; padding: 2px 10px; border-radius: 999px; background: var(--cinnabar); color: var(--paper); font-weight: 500; }
.plan-points { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.plan-points li { position: relative; padding-left: 26px; font-size: 15.5px; }
.plan-points li::before { content: "✓"; position: absolute; left: 0; color: var(--indigo); font-weight: 700; }
.plan-premium .plan-points li::before { content: "◆"; color: var(--gold); font-size: 12px; top: 0.25em; }
.premium-note { max-width: 880px; margin: 28px auto 0; text-align: center; color: var(--ink-faint); font-size: 14px; }

/* CTA */
.cta { padding: 96px 0 112px; text-align: center; background: linear-gradient(rgba(242, 235, 217, 0), rgba(234, 224, 200, 0.8)); }
.cta-inner { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.cta-icon { width: 96px; height: 96px; border-radius: 22px; box-shadow: var(--shadow-lift); }
.cta p { color: var(--ink-soft); max-width: 34em; margin-bottom: 12px; }

/* Footer */
.site-footer { padding: 36px 0 48px; border-top: 0.5px solid var(--rule); background: var(--paper-deep); font-size: 14px; color: var(--ink-soft); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 28px; height: 28px; border-radius: 7px; }
.footer-tagline { color: var(--ink-faint); font-size: 13px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--cinnabar); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Responsive */
@media (max-width: 960px) {
  .site-nav { display: none; }
  .lang-switcher { margin-left: auto; }
  .hero { padding: 48px 0 64px; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 56px; }
  .hero-subtitle { margin-inline: auto; }
  .hero-actions { justify-content: center; flex-direction: column; }
  .hero-column { display: none; }
  .hero-seal { left: -24px; width: 72px; height: 72px; }
  .phone-hero { width: 280px; }
  .feature { grid-template-columns: 1fr; gap: 40px; text-align: left; padding-bottom: 56px; }
  .feature-reverse .feature-media { order: 0; }
  .feature-copy { margin-inline: auto; }
  .details-grid { grid-template-columns: repeat(2, 1fr); }
  .plans { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .header-inner { gap: 12px; }
  .brand span { display: none; }
  .lang-switcher button { padding: 7px 9px; font-size: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 0.5px solid var(--rule); }
  .stat strong { font-size: 28px; }
  .details-grid { grid-template-columns: 1fr; }
  .phone { width: 260px; border-radius: 40px; }
  .phone img { border-radius: 31px; }
  .plan { padding: 28px 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}