@font-face { font-family: "Jingyuan Kai"; src: url("/fonts/jingyuan-kai.woff2") format("woff2"); font-display: swap; }
:root {
  --bg: #F2F6F4; --surface: #FFFFFF; --tint: #DCEBE4; --ink: #1E2B27; --muted: #5D6B66; --line: #D3E0DA;
  --accent: #2F6B5E; --sun: #C98B5A; --tint-ink: #33607D;
  --f-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --f-song: "Songti SC", "STSong", "Noto Serif SC", serif;
  --gutter: 22px; --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow: 0 1px 0 rgba(30,43,39,.04), 0 10px 28px -16px rgba(30,43,39,.28);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--f-sans); -webkit-font-smoothing: antialiased; line-height: 1.6; }
body.locked { overflow: hidden; }
h1, h2, p { margin: 0; }
a { color: inherit; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }

.top { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; padding: max(12px, env(safe-area-inset-top)) var(--gutter) 12px; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--f-song); font-size: 22px; font-weight: 600; letter-spacing: .08em; }

.btn { display: inline-flex; align-items: center; justify-content: center; height: 46px; padding: 0 22px; border-radius: 999px; font-size: 15px; font-weight: 600; text-decoration: none; transition: transform .2s var(--ease), background .2s var(--ease); }
.btn--ink { background: var(--ink); color: #fff; box-shadow: 0 10px 20px -12px rgba(30,43,39,.7); }
.btn--ink:hover { transform: translateY(-1px); }
.btn--line { box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ink) 25%, transparent); }
.btn--ghost { height: 38px; padding: 0 16px; font-weight: 500; }
.btn--ghost:hover { background: color-mix(in srgb, var(--ink) 6%, transparent); }
.btn--block { width: 100%; }

main { max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }
.hero { padding: 48px 0 40px; display: grid; gap: 18px; position: relative; }
.hero::before { content: ""; position: absolute; z-index: -1; right: -60px; top: -40px; width: 340px; height: 340px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--sun) 30%, transparent), transparent 65%); }
.kicker { font-size: 13px; letter-spacing: .2em; color: var(--accent); font-weight: 600; }
.hero h1 { font-family: var(--f-song); font-size: clamp(34px, 8vw, 64px); font-weight: 600; line-height: 1.25; letter-spacing: .02em; }
.lead { font-size: 16px; color: var(--muted); max-width: 34em; line-height: 1.85; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }

.cards { display: grid; gap: 12px; padding-bottom: 28px; }
.card { background: var(--surface); border-radius: 22px; box-shadow: var(--shadow); padding: 20px; display: grid; gap: 8px; }
.card--a { background: linear-gradient(165deg, color-mix(in srgb, var(--sun) 12%, #fff), var(--tint)); border-radius: 28px; }
.card--d { background: var(--tint); border-radius: 24px 12px 24px 24px; box-shadow: none; }
.card__no { font-family: var(--f-song); font-size: 22px; color: var(--accent); }
.card h2 { font-size: 18px; font-weight: 600; }
.card p { font-size: 14px; color: var(--muted); line-height: 1.75; }
.mark-demo { font-family: var(--f-song); font-size: 16px !important; color: var(--ink) !important; }
.mk { background: none; color: inherit; padding: 0 .1em; border-radius: .3em .65em .4em .75em / .55em .35em .6em .4em; background-image: linear-gradient(180deg, transparent 14%, rgba(var(--m), .32) 14%, rgba(var(--m), .3) 86%, transparent 86%); }
.mk--a { --m: 201, 139, 90; } .mk--b { --m: 96, 140, 200; }

.note { margin: 8px 0 40px; padding: 16px 18px; border-radius: 18px; background: color-mix(in srgb, var(--surface) 60%, transparent); box-shadow: inset 0 0 0 1px var(--line); font-size: 13px; color: var(--muted); }
.foot { text-align: center; padding: 24px var(--gutter) calc(28px + env(safe-area-inset-bottom)); font-size: 12px; color: var(--muted); }

.modal { position: fixed; inset: 0; z-index: 50; display: grid; place-items: end center; }
.modal[hidden] { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(30,43,39,.32); animation: fade .2s var(--ease); }
.modal__card { position: relative; width: 100%; max-width: 440px; background: var(--bg); border-radius: 28px 28px 0 0; padding: 26px 22px calc(22px + env(safe-area-inset-bottom)); display: grid; gap: 14px; box-shadow: 0 -18px 40px -24px rgba(0,0,0,.4); animation: rise .28s var(--ease); }
.modal__card h2 { font-family: var(--f-song); font-size: 24px; font-weight: 600; }
.modal__x { position: absolute; right: 14px; top: 12px; width: 36px; height: 36px; border-radius: 50%; font-size: 22px; color: var(--muted); }
.field { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--muted); }
.field input { border: 0; border-radius: 14px; padding: 13px 14px; font: inherit; font-size: 16px; font-weight: 400; color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line) 80%, var(--ink)); }
.field input:focus { outline: none; box-shadow: inset 0 0 0 2px var(--accent); }
.error { font-size: 13px; color: #B3261E; }
.fine { font-size: 12px; color: var(--muted); line-height: 1.7; text-align: center; }
.fine a { color: var(--accent); }
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { transform: translateY(30px); opacity: 0; } }

@media (min-width: 760px) {
  :root { --gutter: 40px; }
  .hero { padding: 96px 0 64px; }
  .cards { grid-template-columns: 1.3fr 1fr; }
  .card--a { grid-row: span 2; padding: 32px; }
  .card--a h2 { font-size: 24px; }
  .modal { place-items: center; }
  .modal__card { border-radius: 28px; padding: 30px 28px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }