:root {
  --bg: #f4f1ea;
  --ink: #1a1814;
  --ink-2: #3f3a33;
  --muted: #6b645a;
  --line: #e2dcd0;
  --card: #fffcf7;
  --accent: #b5471e;
  --accent-ink: #8c3414;
  --accent-soft: #f8e6dc;
  --on-accent: #fffdfb;
  --shadow: 0 1px 0 rgba(26, 24, 20, .04), 0 12px 32px -18px rgba(26, 24, 20, .28);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161411;
    --ink: #f4f0e8;
    --ink-2: #ddd6ca;
    --muted: #b7b0a4;
    --line: #322e28;
    --card: #211e1a;
    --accent: #e08a62;
    --accent-ink: #f0b089;
    --accent-soft: #3a2a22;
    --on-accent: #1a120e;
    --shadow: 0 1px 0 rgba(0, 0, 0, .25), 0 16px 36px -20px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}
a { color: inherit; }
img { max-width: 100%; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.skip {
  position: absolute; left: 12px; top: -40px; background: var(--accent); color: var(--on-accent);
  padding: 8px 12px; border-radius: 8px; z-index: 20;
}
.skip:focus { top: 12px; }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }
.bar {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.bar-inner { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 12px; }
.brand { font-weight: 700; letter-spacing: -.02em; text-decoration: none; font-size: 16px; }
.langs { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; background: var(--card); }
.langs a { text-decoration: none; font-family: var(--mono); font-size: 12px; color: var(--muted); padding: 4px 10px; border-radius: 999px; }
.langs a[aria-current="true"] { background: var(--accent-soft); color: var(--accent-ink); }

.hero { border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .45;
  mask-image: radial-gradient(ellipse at 70% 20%, #000 20%, transparent 70%);
}
.hero-grid { position: relative; display: grid; gap: 28px; padding: 48px 0 40px; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 12px; font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
h1 { font-family: var(--serif); font-weight: 600; font-size: clamp(36px, 8vw, 68px); line-height: 1.05; letter-spacing: -.03em; margin: 0 0 16px; }
h1 em { font-style: normal; color: var(--accent); }
.lead, .intro { color: var(--ink-2); font-size: 17px; max-width: 68ch; }
.lead { margin: 0; }
.aside { color: var(--muted); font-size: 14px; max-width: 62ch; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--card);
  color: var(--ink); text-decoration: none; font: inherit; font-size: 15px; cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn[disabled] { opacity: .6; cursor: default; }
.preview, .card, .panel, .magnet, .offer, details {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
}
.preview { padding: 16px; border-left: 4px solid var(--accent); box-shadow: var(--shadow); }
.preview p, .preview li { font-size: 14px; line-height: 1.65; }
.preview ol { margin: 0; padding-left: 1.2em; }
.kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.section { margin: 48px 0; }
.heading { display: flex; align-items: baseline; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 10px; margin-bottom: 16px; }
.heading h2, .prose h1 { font-family: var(--serif); font-weight: 600; letter-spacing: -.02em; margin: 0; font-size: clamp(26px, 4vw, 34px); }
.idx { font-family: var(--mono); font-size: 12px; color: var(--accent-ink); }
.grid-3, .grid-2, .steps { display: grid; gap: 12px; }
.steps { list-style: none; margin: 0; padding: 0; }
.card { padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.card h3, .panel h3, .offer h3, .magnet h3 { margin: 0; font-size: 17px; letter-spacing: -.01em; }
.card p, .panel p, .offer p { margin: 0; color: var(--ink-2); }
.panel, .offer, .magnet { padding: 18px; }
.panel ul, .offer ul { margin: 8px 0 0; padding-left: 1.2em; }
.panel li, .offer li { margin: 6px 0; color: var(--ink-2); }
.note, .status { color: var(--muted); font-size: 14px; }
.note a, .prose a, .offer a { color: var(--accent-ink); }
.spec { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 12px; margin: 4px 0 0; }
.spec dt { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.spec dd { margin: 0; }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.copy {
  flex: none; font-family: var(--mono); font-size: 12px; color: var(--accent-ink);
  background: var(--accent-soft); border: 0; border-radius: 999px; padding: 6px 10px; cursor: pointer;
}
.msg {
  margin: 0; white-space: pre-wrap; font-family: var(--sans); font-size: 14px; line-height: 1.7;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 12px;
}
.magnet { display: grid; gap: 18px; }
.magnet form, #lead-form { display: flex; flex-direction: column; gap: 8px; }
#lead-form label { font-family: var(--mono); font-size: 12px; color: var(--muted); }
#lead-form input[type="email"] {
  width: 100%; min-height: 44px; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; font: inherit; background: var(--bg); color: var(--ink);
}
#lead-form input[type="email"]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }
.phrase-list { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 12px; }
.zh { margin: 0; font-size: 17px; line-height: 1.7; font-weight: 650; }
.py { margin: 0; font-family: var(--mono); font-size: 13px; line-height: 1.6; color: var(--muted); overflow-wrap: anywhere; }
.en { margin: 0; color: var(--ink-2); }
.pill { font-family: var(--mono); font-size: 12px; color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 3px 8px; }
.offer { display: grid; gap: 18px; border-left: 4px solid var(--accent); }
.price { font-family: var(--mono); font-size: clamp(40px, 10vw, 56px); line-height: 1; margin: 8px 0; color: var(--ink); }
.offer .btn { margin-top: 8px; }
.faq { display: grid; gap: 10px; max-width: 760px; }
details { padding: 12px 14px; }
summary { cursor: pointer; font-weight: 650; }
details p { margin: 10px 0 0; color: var(--ink-2); }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.foot-inner { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 20px 0 32px; }
.foot a { color: var(--accent-ink); }
.prose { padding: 40px 0 64px; max-width: 760px; }
.prose h1 { margin: 8px 0 18px; }
.prose p { color: var(--ink-2); }
@media (max-width: 640px) {
  .actions .btn, #lead-form .btn, .offer .btn { width: 100%; }
}
@media (min-width: 800px) {
  .hero-grid { grid-template-columns: minmax(0, 1.4fr) minmax(240px, 320px); align-items: end; padding: 72px 0 56px; }
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-2 { grid-template-columns: 1fr 1fr; align-items: start; }
  .gaps article { border-left: 1px solid var(--line); padding-left: 14px; }
  .gaps article:first-child { border-left: 0; padding-left: 0; }
  .offer { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: start; }
  .magnet { grid-template-columns: minmax(0, 1fr) minmax(260px, 380px); align-items: center; }
}