:root {
  color-scheme: light dark;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Noto Sans CJK SC",
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono",
    "DejaVu Sans Mono", monospace;

  --bg: #fbfaf7;
  --bg-elevated: #ffffff;
  --bg-subtle: #f2f0eb;
  --bg-code: #f0eee8;
  --text: #1b1c20;
  --text-muted: #55585f;
  --text-faint: #6d7078;
  --border: #ded9cf;
  --border-strong: #c6c0b3;
  --accent: #8a6110;
  --accent-hover: #6d4b0b;
  --accent-contrast: #ffffff;
  --accent-soft: #f6eeda;
  --focus: #1b5ea8;
  --shadow: 0 1px 2px rgba(27, 28, 32, .05), 0 8px 24px rgba(27, 28, 32, .07);
  --radius: 12px;
  --measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --bg-elevated: #1a1d24;
    --bg-subtle: #1f232b;
    --bg-code: #22262f;
    --text: #f0f1f4;
    --text-muted: #b3b8c4;
    --text-faint: #9aa0ad;
    --border: #2e333d;
    --border-strong: #414753;
    --accent: #e0b256;
    --accent-hover: #f0c672;
    --accent-contrast: #17181c;
    --accent-soft: #2a2519;
    --focus: #7ab6f0;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px rgba(0, 0, 0, .34);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 650;
  letter-spacing: .01em;
  margin: 0 0 .6em;
  text-wrap: balance;
}

h1 { font-size: clamp(1.9rem, 1.3rem + 2.4vw, 3rem); }
h2 { font-size: clamp(1.45rem, 1.2rem + 1.1vw, 1.95rem); }
h3 { font-size: 1.16rem; }

p, ul, ol, dl, table, figure, pre {
  margin: 0 0 1.1em;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { color: var(--accent-hover); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: .92em;
}

code:not(pre code) {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: .1em .38em;
  word-break: break-word;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .95rem 1.05rem;
  overflow-x: auto;
  line-height: 1.6;
}

kbd {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: .05em .4em;
}

img { max-width: 100%; height: auto; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: .6rem 1rem;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}

@supports not (backdrop-filter: blur(2px)) {
  .site-header { background: var(--bg); }
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  padding-block: .7rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: .01em;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.brand .brand-light { display: block; }
.brand .brand-dark { display: none; }

@media (prefers-color-scheme: dark) {
  .brand .brand-light { display: none; }
  .brand .brand-dark { display: block; }
}

.site-nav {
  margin-inline-start: auto;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .2rem .35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: .35rem .68rem;
  border-radius: 8px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: .95rem;
}

.site-nav a:hover {
  background: var(--bg-subtle);
  color: var(--text);
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--bg-subtle);
  font-weight: 600;
}

main { display: block; }

section {
  padding-block: clamp(2.6rem, 5vw, 4.4rem);
}

section + section {
  border-top: 1px solid var(--border);
}

.section-head {
  max-width: var(--measure);
  margin-bottom: 2rem;
}

.section-head p {
  color: var(--text-muted);
  margin-bottom: 0;
}

.eyebrow {
  display: block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: .7rem;
}

.hero {
  padding-block: clamp(2.6rem, 6vw, 5rem);
}

.hero-grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3.2rem);
  align-items: center;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); }
}

.hero p.lede {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 46ch;
}

.hero h1 { margin-bottom: .5em; }

.tagline {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border-strong);
  border-color: color-mix(in srgb, var(--accent) 32%, transparent);
  border-radius: 999px;
  padding: .22rem .8rem;
  font-size: .86rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .62rem 1.25rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--accent-contrast);
}

.btn-secondary {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  color: var(--text);
  border-color: var(--text-faint);
}

.btn-row-center { justify-content: center; }

.hint {
  color: var(--text-faint);
  font-size: .9rem;
  margin: 0;
}

.shot {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.shot img {
  display: block;
  width: 100%;
  background: var(--bg-subtle);
}

.shot figcaption {
  padding: .65rem .9rem;
  font-size: .88rem;
  color: var(--text-faint);
  border-top: 1px solid var(--border);
}

.shot-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: 1.5rem;
  text-align: center;
  color: var(--text-faint);
  font-size: .92rem;
  background:
    repeating-linear-gradient(135deg,
      var(--bg-subtle) 0 12px,
      var(--bg-elevated) 12px 24px);
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr));
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}

.card h3 {
  margin-bottom: .45em;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.card ul {
  padding-inline-start: 1.15rem;
  color: var(--text-muted);
}

.card .card-meta {
  display: block;
  font-size: .82rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: .5rem;
  font-weight: 700;
}

.prose {
  max-width: var(--measure);
}

.prose ul, .prose ol {
  padding-inline-start: 1.3rem;
}

.prose li + li {
  margin-top: .35em;
}

.prose li > strong:first-child {
  color: var(--text);
}

.callout {
  border: 1px solid var(--border-strong);
  border-inline-start: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--bg-elevated);
  padding: 1rem 1.2rem;
  margin: 0 0 1.4rem;
}

.callout > :last-child { margin-bottom: 0; }

.callout h3 {
  font-size: 1.02rem;
  margin-bottom: .35em;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: .96rem;
}

caption {
  caption-side: top;
  text-align: start;
  padding: .8rem 1rem 0;
  color: var(--text-faint);
  font-size: .9rem;
}

th, td {
  text-align: start;
  padding: .62rem .9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

thead th {
  background: var(--bg-subtle);
  font-size: .88rem;
  letter-spacing: .04em;
  color: var(--text-muted);
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.yes { color: var(--accent); font-weight: 700; }
.no { color: var(--text-faint); }

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  max-width: var(--measure);
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding-inline-start: 2.6rem;
  margin-bottom: 1.1rem;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  inset-inline-start: 0;
  top: .18em;
  width: 1.8rem;
  height: 1.8rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent);
  font-size: .9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.steps > li > :last-child { margin-bottom: 0; }

.faq {
  max-width: var(--measure);
}

.faq > h2 {
  font-size: .84rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 2rem 0 .8rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}

.faq > h2:first-child { margin-top: 0; }

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  padding: 0 1.1rem;
  margin-bottom: .7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 620;
  padding: .85rem 0;
  list-style: none;
  display: flex;
  gap: .6rem;
  align-items: baseline;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::before {
  content: "＋";
  color: var(--accent);
  font-weight: 700;
  flex: none;
}

.faq details[open] summary::before { content: "－"; }

.faq details[open] summary {
  border-bottom: 1px solid var(--border);
}

.faq .faq-body {
  padding: .9rem 0 .3rem 1.5rem;
}

.faq .faq-body > :last-child { margin-bottom: 0; }

.gallery {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
}

.kv {
  display: grid;
  gap: .1rem 1.2rem;
  margin: 0 0 1.2rem;
}

@media (min-width: 620px) {
  .kv { grid-template-columns: max-content minmax(0, 1fr); }
}

.kv dt {
  font-weight: 650;
  color: var(--text);
}

.kv dd {
  margin: 0 0 .55rem;
  color: var(--text-muted);
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1.2rem;
}

.pill-list li {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: 999px;
  padding: .2rem .78rem;
  font-size: .9rem;
  color: var(--text-muted);
}

.cta {
  background: var(--bg-subtle);
}

.cta .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.cta h2 { margin-bottom: .25em; }
.cta p { margin-bottom: 0; color: var(--text-muted); }
.cta .btn-row { margin-bottom: 0; }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding-block: 2.2rem;
  color: var(--text-faint);
  font-size: .92rem;
}

.site-footer .wrap {
  display: grid;
  gap: 1.4rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
}

.site-footer h2 {
  font-size: .82rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: .6rem;
}

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

.site-footer li { margin-bottom: .3rem; }

.site-footer .legal {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
  margin: 0;
  max-width: var(--measure);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.center { text-align: center; }

.notfound {
  min-height: 52vh;
  display: grid;
  place-content: center;
  text-align: center;
}