@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(/fonts/fraunces-600.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/fonts/inter-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(/fonts/inter-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(/fonts/inter-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 650;
  font-display: swap;
  src: url(/fonts/inter-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #faf8f5;
  --surface: #ffffff;
  --text: #1c1a17;
  --muted: #6b665e;
  --line: #e7e2da;
  --accent: #c2562f;
  --accent-soft: #f6e6de;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141311;
    --surface: #1c1b18;
    --text: #f1ede6;
    --muted: #a39d93;
    --line: #2e2c28;
    --accent: #e57b52;
    --accent-soft: #33231c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

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

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 18px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand svg { width: 28px; height: 28px; flex: none; }

nav.site a {
  margin-inline-start: 22px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}
nav.site a:hover { color: var(--text); }

.hero { padding: 96px 0 72px; }

.eyebrow {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

h1 {
  font-family: "Fraunces", Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(38px, 6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 22px 0 20px;
  max-width: 14ch;
}

.lead {
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--muted);
  max-width: 38em;
  margin: 0;
}

section.block {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 30px;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }

dl.facts {
  display: grid;
  grid-template-columns: 200px 1fr;
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

dl.facts dt, dl.facts dd {
  margin: 0;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
}
dl.facts dt { color: var(--muted); font-size: 15px; }
dl.facts dd { font-weight: 500; }
dl.facts dt:last-of-type, dl.facts dd:last-of-type { border-bottom: 0; }

.contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.button {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
}
.button:hover { color: var(--bg); opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 14px;
}

footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

footer.site a { margin-inline-start: 18px; text-decoration: none; }

/* 法律页正文 */
.doc { padding: 64px 0 80px; max-width: 720px; }
.doc h1 { font-size: clamp(34px, 5vw, 46px); max-width: none; }
.doc h2 { font-size: 22px; margin: 40px 0 10px; }
.doc p, .doc li { color: var(--text); }
.doc .updated { color: var(--muted); font-size: 15px; }

@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 64px 0 48px; }
  .grid { grid-template-columns: 1fr; }
  dl.facts { grid-template-columns: 1fr; }
  dl.facts dt { padding-bottom: 0; border-bottom: 0; }
  dl.facts dd { padding-top: 4px; }
  nav.site a { margin-inline-start: 14px; }
  footer.site a:first-child { margin-inline-start: 0; }
}

/* 第二版：产品、数据条、FAQ */
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.button.ghost:hover { color: var(--accent); border-color: var(--accent); }

.stats {
  list-style: none;
  padding: 0;
  margin: 56px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.stats li { padding: 20px 22px; border-inline-end: 1px solid var(--line); }
.stats li:last-child { border-inline-end: 0; }
.stats strong { display: block; font-family: "Fraunces", Georgia, serif; font-size: 28px; font-weight: 600; }
.stats span { color: var(--muted); font-size: 14px; }

.sub { color: var(--muted); margin: -16px 0 28px; max-width: 40em; }
h3.cat {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 32px 0 12px;
}
h3.cat:first-of-type { margin-top: 0; }

.card.product {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}
.card.product:hover { border-color: var(--accent); transform: translateY(-2px); color: inherit; }
.card.product h4 { margin: 0 0 6px; font-size: 18px; }
.card.product p { flex: 1; }
.card.product .domain { margin-top: 14px; font-size: 14px; color: var(--accent); font-weight: 500; }

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

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 18px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 10px 0 0; color: var(--muted); max-width: 46em; }

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats li:nth-child(2) { border-inline-end: 0; }
  .stats li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .grid.two { grid-template-columns: 1fr; }
  nav.site a:first-child { display: none; }
}

/* 第三版：关于、步骤、承诺清单 */
.prose { max-width: 46em; margin-bottom: 28px; }
.prose p { margin: 0 0 16px; }
.grid.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.steps li { border-top: 2px solid var(--accent); padding-top: 18px; }
.steps .num { font-family: "Fraunces", Georgia, serif; font-size: 28px; color: var(--accent); }
.steps h3 { margin: 6px 0 8px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); font-size: 16px; }

.checks { list-style: none; padding: 0; margin: 0; max-width: 46em; }
.checks li { position: relative; padding: 12px 0; padding-inline-start: 34px; border-bottom: 1px solid var(--line); }
.checks li::before {
  content: "✓";
  position: absolute;
  inset-inline-start: 0;
  top: 12px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px; font-weight: 700;
  display: grid; place-items: center;
}

@media (max-width: 720px) {
  .grid.two-col { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}

/* 法律页补充 */
.doc h3 { font-size: 17px; margin: 22px 0 6px; }
.doc ul { padding-inline-start: 22px; }
.doc li { margin-bottom: 8px; }
.doc code { font-size: 0.9em; background: var(--accent-soft); padding: 1px 6px; border-radius: 6px; }
.summary { background: var(--surface); border: 1px solid var(--line); border-inline-start: 3px solid var(--accent); border-radius: var(--radius); padding: 4px 22px; margin: 24px 0 8px; }
.note { color: var(--muted); font-weight: 400; font-size: 14px; }