:root {
  --bg: #f3eee4;
  --bg-deep: #16130f;
  --ink: #1b1713;
  --muted: #5a5148;
  --ivory: #f7f3eb;
  --gold: #a68445;
  --gold-2: #e0cb96;
  --line: rgba(27, 23, 19, 0.12);
  --line-strong: rgba(27, 23, 19, 0.28);
  --white: #fffdf8;
  --header: 76px;
  --max: 1120px;
  --serif: "Noto Serif SC", "Songti SC", "STSong", "PMingLiU", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --latin: "Cormorant Garamond", "Palatino Linotype", Palatino, serif;
  color-scheme: light;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(166, 132, 69, 0.14), transparent 55%),
    linear-gradient(180deg, #f7f3eb 0%, var(--bg) 42%, #ebe4d6 100%);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

body.nav-lock { overflow: hidden; }

h1, h2, h3, p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }

img, svg { display: block; max-width: 100%; }

::selection { background: #e7d3a4; color: #1b1713; }

:focus-visible {
  outline: 2px solid var(--gold-2);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 80;
  background: var(--gold-2);
  color: var(--ink);
  padding: 8px 12px;
}

.skip:focus { top: 10px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  height: var(--header);
  color: var(--ivory);
  background: rgba(20, 17, 13, 0.94);
  border-bottom: 1px solid rgba(224, 203, 150, 0.2);
  backdrop-filter: blur(16px);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold-2), transparent);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.logo-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-2);
  color: var(--ivory);
  font-family: var(--serif);
  font-size: 22px;
  flex: none;
}

.logo-cn {
  display: block;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.18em;
  line-height: 1.1;
}

.logo-en {
  display: block;
  margin-top: 2px;
  color: var(--gold-2);
  font-family: var(--latin);
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(224, 203, 150, 0.4);
  background: transparent;
  color: var(--ivory);
  align-items: center;
  justify-content: center;
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  position: relative;
}

.nav-toggle-lines::before,
.nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-lines::before { top: -6px; }
.nav-toggle-lines::after { top: 6px; }

.nav-open .nav-toggle-lines { background: transparent; }
.nav-open .nav-toggle-lines::before { top: 0; transform: rotate(45deg); }
.nav-open .nav-toggle-lines::after { top: 0; transform: rotate(-45deg); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
}

.site-nav a[aria-current="page"] { color: var(--gold-2); }

.nav-cta {
  padding: 8px 14px;
  border: 1px solid var(--gold-2);
}

.hero,
.page-hero {
  background:
    radial-gradient(820px 420px at 85% 0%, rgba(166, 132, 69, 0.2), transparent 60%),
    linear-gradient(180deg, #221c16 0%, #12100d 100%);
  color: var(--ivory);
  padding: calc(var(--header) + 54px) 0 72px;
  position: relative;
}

.page-howmind .page-hero {
  background:
    radial-gradient(820px 420px at 90% 0%, rgba(92, 158, 196, 0.28), transparent 58%),
    linear-gradient(180deg, #152430 0%, #101417 100%);
}

.page-kuake .page-hero {
  background:
    radial-gradient(820px 420px at 88% 0%, rgba(126, 168, 112, 0.28), transparent 58%),
    linear-gradient(180deg, #1a2b20 0%, #101612 100%);
}

.page-gotall .page-hero {
  background:
    radial-gradient(820px 420px at 88% 0%, rgba(176, 92, 78, 0.32), transparent 58%),
    linear-gradient(180deg, #2a1816 0%, #140f0e 100%);
}

.kicker,
.crumb {
  color: var(--gold-2);
  font-family: var(--latin);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 15px;
}

.crumb { letter-spacing: 0.08em; text-transform: none; font-family: var(--sans); font-size: 13px; }
.crumb a { color: var(--gold-2); }

.hero h1,
.page-hero h1 {
  margin-top: 12px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(64px, 10vw, 112px);
  line-height: 0.95;
  letter-spacing: 0.08em;
}

.page-hero h1 {
  font-size: clamp(42px, 6vw, 76px);
  letter-spacing: 0.04em;
  line-height: 1.15;
}

.hero-en,
.lede {
  margin-top: 14px;
  color: #e7dcc8;
}

.hero-en {
  font-family: var(--latin);
  font-size: 28px;
  letter-spacing: 0.12em;
}

.hero-lead,
.page-hero .lede {
  max-width: 38rem;
  margin-top: 18px;
  font-size: 17px;
  color: #f3ecdf;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--gold-2);
  color: var(--ivory);
}

.btn-solid {
  background: var(--gold-2);
  color: #1b1713;
  border-color: var(--gold-2);
}

.btn-dark {
  border-color: var(--ink);
  color: var(--ink);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-art { margin: 0; }

.constellation {
  position: relative;
  width: min(440px, 100%);
  aspect-ratio: 1;
  margin: 44px auto 40px;
}

.constellation svg { width: 100%; height: 100%; }

.tip {
  position: absolute;
  margin: 0;
  text-align: center;
  line-height: 1.35;
  color: var(--ivory);
}

.tip b {
  display: block;
  font-weight: 500;
  font-size: 15px;
  white-space: nowrap;
}

.tip span {
  display: block;
  color: var(--gold-2);
  font-family: var(--latin);
  letter-spacing: 0.04em;
  font-size: 16px;
}

.tip-howmind { left: 50%; top: 5%; transform: translate(-50%, -100%); }
.tip-kuake { left: 20%; top: 90%; transform: translate(-50%, 0); }
.tip-gotall { left: 80%; top: 90%; transform: translate(-50%, 0); }

.hero-art figcaption {
  margin-top: 8px;
  text-align: center;
  color: #cbbfae;
  letter-spacing: 0.14em;
  font-size: 13px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid rgba(224, 203, 150, 0.28);
}

.hero-facts b,
.hero-facts span { display: block; }

.hero-facts b { font-family: var(--serif); font-weight: 600; }
.hero-facts span { color: #cbbfae; font-size: 14px; }

.section { padding: 88px 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line-strong);
}

.section-head h2,
.block-title {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.section-head p { max-width: 26rem; color: var(--muted); }

.card-grid,
.points,
.season-grid,
.split,
.contact-grid,
.thesis-grid,
.org-children {
  display: grid;
  gap: 22px;
}

.card-grid,
.points,
.season-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.biz-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--white);
  border: 1px solid var(--line);
  color: inherit;
}

.biz-card:hover { border-color: var(--gold); transform: translateY(-4px); }

.card-media svg { width: 100%; height: 150px; }

.card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }

.eyebrow {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.biz-card h3,
.points h3,
.season-grid h3 {
  margin: 8px 0 6px;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
}

.domain {
  font-family: var(--latin);
  color: var(--gold);
  letter-spacing: 0.08em;
  font-size: 20px;
}

.biz-card p,
.points p,
.season-grid p,
.prose p { color: var(--muted); }

.card-go {
  margin-top: auto;
  padding-top: 18px;
  letter-spacing: 0.08em;
  font-size: 14px;
}

.thesis-grid,
.split,
.contact-grid { grid-template-columns: 0.85fr 1.15fr; align-items: start; }

.principles { margin-top: 28px; display: grid; gap: 18px; }

.principles article,
.principles li {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.principles h3 {
  margin: 6px 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
}

.num {
  font-family: var(--latin);
  color: var(--gold);
  font-size: 28px;
  line-height: 1;
}

.points li,
.season-grid article,
.panel {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 22px;
}

.prose p + p { margin-top: 1em; }

.prose a { color: #8a6428; text-decoration: underline; text-underline-offset: 3px; }

.org { margin-top: 28px; }

.org-root,
.org-children a {
  border: 1px solid var(--line-strong);
  background: var(--white);
  text-align: center;
  padding: 18px 14px;
}

.org-root { max-width: 320px; margin-inline: auto; }
.org-root strong { display: block; font-family: var(--serif); font-size: 28px; letter-spacing: 0.12em; }
.org-root span,
.org-children small { display: block; color: var(--muted); }

.org-stem {
  width: 1px;
  height: 28px;
  margin: 0 auto;
  background: var(--line-strong);
}

.org-children { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.org-children strong { display: block; font-family: var(--serif); font-size: 22px; }

.brand-table { width: 100%; border-collapse: collapse; background: var(--white); }

.brand-table th,
.brand-table td {
  text-align: left;
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  font-weight: 400;
}

.brand-table th { color: var(--muted); font-size: 13px; letter-spacing: 0.08em; }

.ridge { background: #101612; color: #d7bc82; }
.ridge svg { width: 100%; height: 90px; }

.site-footer {
  background:
    linear-gradient(#100e0c, #100e0c) padding-box,
    linear-gradient(90deg, transparent, #e0cb96, transparent) border-box;
  border-top: 1px solid transparent;
  color: #f3ecdf;
  padding: 56px 0 24px;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) 1.2fr;
  gap: 48px 64px;
  align-items: end;
}

.footer-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  color: inherit;
}

.footer-brand {
  display: block;
  font-family: var(--serif);
  font-size: 32px;
  letter-spacing: 0.18em;
  line-height: 1;
}

.footer-en {
  display: block;
  margin-top: 6px;
  font-family: var(--latin);
  color: var(--gold-2);
  letter-spacing: 0.16em;
  font-size: 16px;
}

.footer-address,
.footer-mail {
  display: block;
  margin-top: 16px;
  color: #cbbfae;
  font-size: 14px;
  line-height: 1.6;
}

.footer-mail { margin-top: 4px; color: var(--gold-2); }
.footer-mail:hover { color: var(--ivory); }

.footer-biz { border-top: 1px solid rgba(224, 203, 150, 0.28); }

.footer-biz a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(224, 203, 150, 0.16);
}

.footer-biz a span {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.08em;
}

.footer-biz a small {
  font-family: var(--latin);
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--gold-2);
}

.footer-biz a:hover span { color: var(--gold-2); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
  color: #a89880;
  font-size: 13px;
}

.footer-meta { display: flex; gap: 20px; }
.footer-meta a:hover { color: var(--ivory); }

.contact-form,
.panel { display: grid; gap: 14px; }

label { display: grid; gap: 6px; font-size: 14px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--white);
  padding: 12px 12px;
}

textarea { min-height: 140px; resize: vertical; }

.form-status {
  padding: 12px 14px;
  background: #efe4cc;
  color: var(--ink);
}

.side-index {
  position: absolute;
  left: 18px;
  top: 58%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  letter-spacing: 0.42em;
  color: rgba(224, 203, 150, 0.72);
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero-grid,
  .thesis-grid,
  .split,
  .contact-grid,
  .footer-main,
  .card-grid,
  .org-children { grid-template-columns: 1fr; }
  .side-index { display: none; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    gap: 8px;
    width: auto;
    padding: 0 12px;
  }

  .nav-toggle .sr-only {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    clip: auto;
    overflow: visible;
  }
  .site-nav {
    position: fixed;
    top: var(--header);
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 28px 24px;
    background: rgba(16, 14, 12, 0.98);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .site-header.nav-open .site-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .site-nav a { font-family: var(--serif); font-size: 30px; padding: 8px 0; }
  .hero-facts,
  .points,
  .season-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .biz-card { transition: none; }
}