:root {
  color-scheme: light;
  --paper: #f2eddf;
  --paper-light: #fbf8ef;
  --ink: #20231f;
  --muted: #66685f;
  --line: #d7cfbd;
  --green: #1e4c3c;
  --green-deep: #14352d;
  --navy: #21334a;
  --red: #a33a30;
  --gold: #bd9139;
  --shadow: 0 18px 50px rgba(39, 43, 37, 0.12);
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
}
.login-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 20%, rgba(163, 58, 48, 0.09), transparent 32%),
    radial-gradient(circle at 82% 78%, rgba(30, 76, 60, 0.12), transparent 34%),
    var(--paper);
}
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 32px 18px; }
.login-card {
  position: relative;
  width: min(520px, 100%);
  overflow: hidden;
  padding: 42px;
  border: 1px solid #cfc5ae;
  background: var(--paper-light);
  box-shadow: 0 30px 90px rgba(39, 43, 37, 0.18);
}
.login-card::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: radial-gradient(rgba(55, 60, 52, 0.07) 0.7px, transparent 0.7px); background-size: 7px 7px; }
.login-card > * { position: relative; }
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 42px; }
.login-brand b { display: block; font-family: var(--serif); font-size: 17px; }
.login-brand small { display: block; color: var(--muted); font: 9px/1.4 var(--mono); letter-spacing: 1px; }
.login-card h1 { margin-bottom: 14px; font-size: clamp(32px, 8vw, 46px); }
.login-intro { margin: 0; color: var(--muted); }
.login-form { display: grid; gap: 10px; margin-top: 30px; }
.login-form label { color: var(--green); font-size: 13px; font-weight: 700; }
.login-form input { width: 100%; min-height: 48px; border: 1px solid #bdb5a3; border-radius: 0; background: white; padding: 10px 12px; }
.login-form input[readonly] { background: #eee8da; color: var(--muted); }
.login-form .button { margin-top: 6px; cursor: pointer; }
.login-form .button:disabled { cursor: wait; opacity: 0.65; }
.login-status { min-height: 1.7em; margin: 14px 0 0; color: var(--red); font-size: 13px; }
.login-boundary { margin: 20px 82px 0 0; color: var(--muted); font-size: 12px; }
.login-stamp { position: absolute; right: 30px; bottom: 28px; display: grid; place-items: center; width: 64px; height: 64px; border: 3px double var(--red); border-radius: 50%; color: var(--red); font: 700 13px/1.3 var(--serif); text-align: center; transform: rotate(-8deg); }
a { color: inherit; }
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; background: var(--ink); color: white; padding: 10px 16px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(76, 77, 68, 0.16);
  background: rgba(242, 237, 223, 0.94);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; margin-right: auto; }
.brand-seal {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 5px;
  border: 2px solid var(--red);
  color: var(--red);
  font: 700 12px/1.1 var(--serif);
  text-align: center;
  transform: rotate(-3deg);
}
.brand b { display: block; font-family: var(--serif); font-size: 17px; }
.brand small { display: block; color: var(--muted); font: 9px/1.4 var(--mono); letter-spacing: 1px; }
nav { display: flex; gap: 24px; }
nav a { color: #45473f; font-size: 14px; text-decoration: none; }
nav a:hover { color: var(--red); }
.account-chip { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--paper-light); padding: 7px 11px; font-size: 12px; }
.account-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); }
.account-chip.ready .account-dot { background: #2f805e; }

.hero { overflow: hidden; padding: 94px 0 110px; background-image: radial-gradient(rgba(55, 60, 52, 0.08) 0.7px, transparent 0.7px); background-size: 7px 7px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr); align-items: center; gap: 68px; }
.eyebrow { margin: 0 0 16px; color: var(--red); font: 700 12px/1.5 var(--mono); letter-spacing: 1.8px; }
.eyebrow.gold { color: var(--gold); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { margin-top: 0; font-family: var(--serif); line-height: 1.35; }
h1 { margin-bottom: 24px; font-size: clamp(38px, 5.2vw, 64px); letter-spacing: -0.04em; }
h1 em { color: var(--red); font-style: normal; }
.hero-lead { max-width: 670px; margin: 0; color: #50534a; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 18px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 10px 20px; border: 1px solid var(--green); text-decoration: none; font-weight: 700; }
.button.primary { background: var(--green); color: white; }
.button.secondary { color: var(--green); }
.button:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(30, 76, 60, 0.14); }
.privacy-note { color: var(--muted); font-size: 13px; }
.privacy-note span { color: #2f805e; margin-right: 7px; }

.card-deck { position: relative; min-height: 440px; }
.deck-card {
  position: absolute;
  width: min(390px, 88%);
  min-height: 236px;
  padding: 42px 34px 30px;
  border: 1px solid #cfc5ae;
  background: var(--paper-light);
  box-shadow: var(--shadow);
}
.deck-card p { margin: 0 0 14px; color: var(--green); font: 700 11px/1.4 var(--mono); letter-spacing: 1px; }
.deck-card h2 { font-size: 24px; }
.deck-card small { display: block; border-top: 1px solid var(--line); padding-top: 14px; color: var(--muted); }
.deck-one { left: 2%; top: 8px; z-index: 2; transform: rotate(-4deg); }
.deck-two { right: 0; bottom: 16px; transform: rotate(3deg); }
.paper-tape { position: absolute; top: -12px; left: 50%; width: 76px; height: 24px; background: rgba(208, 188, 135, 0.55); transform: translateX(-50%) rotate(-2deg); }
.deck-stamp { position: absolute; right: 2%; top: 42%; z-index: 4; display: grid; place-items: center; width: 76px; height: 76px; border: 3px double var(--red); border-radius: 50%; color: var(--red); font: 700 15px/1.3 var(--serif); text-align: center; transform: rotate(-9deg); }

.section-paper { padding: 94px 0; }
.section-paper h2, .section-dark h2, .access h2 { margin-bottom: 12px; font-size: clamp(30px, 4vw, 44px); }
.section-intro { max-width: 760px; margin: 0 0 38px; color: var(--muted); }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.answer-card { min-height: 270px; padding: 30px; border: 1px solid var(--line); background: rgba(251, 248, 239, 0.7); }
.answer-card.considered { border-top: 5px solid var(--green); background: var(--paper-light); box-shadow: 0 10px 30px rgba(39, 43, 37, 0.08); }
.answer-card.muted { border-top: 5px solid #969689; color: #606159; }
.answer-label { display: inline-block; margin-bottom: 22px; color: var(--muted); font: 700 11px/1.4 var(--mono); letter-spacing: 1px; }
.answer-card h3 { font-size: 24px; }
.answer-card ul { margin: 0; padding-left: 20px; }
.answer-card li + li { margin-top: 8px; }

.section-dark { padding: 94px 0; background: var(--navy); color: #f4efe2; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 42px; background: rgba(255, 255, 255, 0.13); }
.steps article { min-height: 230px; padding: 28px; background: var(--navy); }
.steps span { color: var(--gold); font: 700 13px/1 var(--mono); }
.steps h3 { margin: 38px 0 10px; font-size: 21px; }
.steps p { margin: 0; color: #c9c4b8; font-size: 14px; }

.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 30px; }
.section-heading-row h2 { margin-bottom: 0; }
.library-summary { flex: 0 0 auto; margin: 0; color: var(--muted); font: 12px/1.5 var(--mono); }
.library-controls { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, 240px); gap: 16px; padding: 18px; border: 1px solid var(--line); background: rgba(251, 248, 239, 0.72); }
.library-controls label { display: grid; gap: 6px; color: var(--muted); font-size: 12px; }
.library-controls input, .library-controls select { width: 100%; min-height: 44px; border: 1px solid #bdb5a3; border-radius: 0; background: white; color: var(--ink); padding: 9px 12px; }
.library-state { margin-top: 28px; color: var(--muted); }
.library-state:empty { display: none; }
.cognition-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 24px; }
.cognition-card {
  position: relative;
  min-height: 250px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper-light);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(39, 43, 37, 0.06);
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.cognition-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-topline { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font: 11px/1.4 var(--mono); text-transform: uppercase; }
.maturity { color: var(--green); font-weight: 800; }
.maturity.draft { color: #7c6750; }
.cognition-card h3 { margin: 28px 0 12px; font-size: 21px; }
.cognition-card p { margin: 0; color: var(--muted); font-size: 14px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 24px; }
.card-tags span { border: 1px solid var(--line); padding: 3px 7px; color: var(--muted); font-size: 11px; }

.access { padding: 86px 0; background: var(--green-deep); color: #f3eee2; }
.access-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: start; }
.access-grid > div > p:last-child { color: #c8c2b5; }
.access-list { margin: 0; border-top: 1px solid rgba(255, 255, 255, 0.2); }
.access-list div { display: grid; grid-template-columns: 80px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.2); }
.access-list dt { color: var(--gold); font-family: var(--serif); font-weight: 700; }
.access-list dd { margin: 0; color: #d7d1c4; }

footer { padding: 28px 0; border-top: 1px solid var(--line); background: var(--paper-light); }
.footer-inner { display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 12px; }
.footer-inner p:first-of-type { margin-right: auto; color: var(--ink); font-weight: 700; }
.footer-inner p { margin-block: 0; }
.footer-seal { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid var(--red); color: var(--red); font-family: var(--serif); transform: rotate(-4deg); }

dialog { width: min(760px, calc(100% - 32px)); max-height: min(82vh, 860px); padding: 0; border: 1px solid #bdb4a0; background: var(--paper-light); color: var(--ink); box-shadow: 0 30px 90px rgba(19, 25, 22, 0.35); }
dialog::backdrop { background: rgba(16, 26, 23, 0.62); backdrop-filter: blur(3px); }
.dialog-head { position: sticky; top: 0; display: flex; align-items: start; justify-content: space-between; gap: 24px; padding: 28px 32px 20px; border-bottom: 1px solid var(--line); background: var(--paper-light); }
.dialog-head h2 { margin: 5px 0 0; font-size: 28px; }
.dialog-meta { margin: 0; color: var(--green); font: 700 11px/1.4 var(--mono); letter-spacing: 0.7px; }
.icon-button { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; font-size: 26px; line-height: 1; }
.dialog-content { margin: 0; padding: 24px 32px; color: #464a42; font-size: 16px; }
.dialog-sections { display: grid; gap: 0; padding: 0 32px 34px; }
.dialog-section { padding: 20px 0; border-top: 1px solid var(--line); }
.dialog-section h3 { margin-bottom: 10px; color: var(--red); font-size: 16px; }
.dialog-section h4 { margin: 0 0 8px; color: var(--ink); font-size: 17px; }
.guidance-section p { margin: 0; color: #464a42; }
.dialog-section ul { margin: 0; padding-left: 20px; }
.dialog-section li + li { margin-top: 6px; }

@media (max-width: 920px) {
  nav { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .card-deck { max-width: 560px; width: 100%; margin: 0 auto; }
  .steps { grid-template-columns: 1fr 1fr; }
  .cognition-grid { grid-template-columns: 1fr 1fr; }
  .access-grid { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 28px, 1160px); }
  .site-header { position: static; }
  .header-inner { min-height: 68px; gap: 10px; }
  .brand-seal { width: 38px; height: 38px; font-size: 10px; }
  .brand b { font-size: 14px; }
  .brand small { display: none; }
  .account-chip { max-width: 116px; padding: 6px 8px; }
  .account-chip span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .hero { padding: 64px 0 74px; }
  .hero-grid { gap: 38px; }
  h1 { font-size: clamp(35px, 11vw, 48px); }
  .hero-lead { font-size: 15px; }
  .hero-actions .button { flex: 1 1 100%; }
  .card-deck { min-height: 370px; }
  .deck-card { width: 92%; min-height: 210px; padding: 35px 24px 24px; }
  .deck-card h2 { font-size: 20px; }
  .deck-one { left: 0; }
  .deck-two { right: 0; }
  .deck-stamp { right: 0; width: 64px; height: 64px; font-size: 13px; }
  .section-paper, .section-dark { padding: 70px 0; }
  .comparison-grid, .steps, .cognition-grid { grid-template-columns: 1fr; }
  .steps article { min-height: auto; }
  .steps h3 { margin-top: 18px; }
  .section-heading-row { display: block; }
  .library-summary { margin-top: 10px; }
  .library-controls { grid-template-columns: 1fr; }
  .cognition-card { min-height: 220px; }
  .footer-inner { flex-wrap: wrap; }
  .footer-inner p:first-of-type { margin-right: 0; }
  .footer-inner p:last-child { flex-basis: 100%; }
  .dialog-head, .dialog-content, .dialog-sections { padding-left: 20px; padding-right: 20px; }
  .login-card { padding: 30px 24px; }
  .login-brand { margin-bottom: 34px; }
  .login-boundary { margin-right: 70px; }
  .login-stamp { right: 20px; bottom: 22px; width: 56px; height: 56px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}