/* Moyu Technology 企业官网 — v4 中文极简
   参考：Anthropic / DeepSeek / 月之暗面 的排版逻辑
   原则：大字 · 留白 · 单色 · 无装饰 */

:root {
  --bg:           #F4F0E8;
  --surface:      #FFFFFF;
  --surface-alt:  #EEEAE0;
  --ink:          #15171A;
  --ink-2:        #4A4D52;
  --ink-3:        #868A90;
  --ink-4:        #C0C3C8;
  --hairline:     rgba(21,23,26,0.08);
  --hairline-2:   rgba(21,23,26,0.14);
  --primary:      #CC7A52;
  --primary-ink:  #A66140;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Sans SC', 'DM Sans', -apple-system, BlinkMacSystemFont,
               'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; transition: color 0.15s ease; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ── Header ───────────────────────────────────────── */
.site-header {
  padding: 24px 0;
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244,240,232,0.8);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ink);
  letter-spacing: -0.1px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--ink);
  color: var(--bg);
  font-family: 'Nunito', sans-serif;
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.5px;
}
.site-nav {
  display: flex;
  gap: 4px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 14.5px;
}
.site-nav a {
  color: var(--ink-2);
  padding: 8px 14px;
  border-radius: 6px;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a.active { color: var(--ink); font-weight: 700; }

/* ── Hero ─────────────────────────────────────────── */
.hero {
  padding: 100px 0 88px;
  border-bottom: 1px solid var(--hairline);
}
.hero-eyebrow {
  display: inline-block;
  margin: 0 0 44px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--hairline-2);
  border-radius: 999px;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.1px;
}
.hero h1 {
  margin: 0 0 28px;
  max-width: 820px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--ink);
}
.hero h1 .accent { color: var(--primary); }
.hero .lead {
  margin: 0 0 40px;
  max-width: 620px;
  font-size: 17px;
  font-weight: 400;
  color: var(--ink-2);
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 96px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 56px;
  padding-top: 44px;
  margin: 0;
  border-top: 1px solid var(--hairline);
}
.hero-stats > div { margin: 0; }
.hero-stats dt {
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-3);
  margin: 0 0 8px;
  letter-spacing: 0.1px;
}
.hero-stats dd {
  margin: 0;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.hero-stats .hero-stats-sub {
  display: block;
  margin-top: 4px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}

/* ── Page hero (inner pages) ──────────────────────── */
.page-hero {
  padding: 120px 0 80px;
  border-bottom: 1px solid var(--hairline);
}
.page-hero .eyebrow {
  display: inline-block;
  margin: 0 0 24px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--hairline-2);
  border-radius: 999px;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.1px;
}
.page-hero h1 {
  margin: 0 0 22px;
  max-width: 760px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.9px;
  color: var(--ink);
}
.page-hero .lead {
  margin: 0;
  max-width: 680px;
  font-size: 18px;
  color: var(--ink-2);
  line-height: 1.65;
}

/* ── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 8px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: #000; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline-2);
}
.btn-ghost:hover { border-color: var(--ink); }

/* ── Section ──────────────────────────────────────── */
.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--hairline);
}
.section:last-of-type { border-bottom: 0; }
.section-head {
  max-width: 720px;
  margin: 0 0 56px;
}
.section-eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--hairline-2);
  border-radius: 999px;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.1px;
}
.section-title {
  margin: 0 0 16px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: clamp(24px, 2.8vw, 34px);
  letter-spacing: -0.7px;
  line-height: 1.2;
  color: var(--ink);
}
.section-sub {
  margin: 0;
  max-width: 620px;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.65;
}

/* ── Products ─────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  overflow: hidden;
}
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  padding: 40px;
  color: var(--ink);
  transition: background 0.15s ease;
}
.product-card:hover { background: var(--surface); }
.product-card--soft { cursor: default; }
.product-card--soft:hover { background: var(--bg); }

.product-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}
.product-kicker-sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ink-4);
}
.product-name {
  margin: 0 0 12px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.4px;
  line-height: 1.25;
  color: var(--ink);
}
.product-tag {
  margin: 0 0 32px;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-2);
  flex: 1;
}
.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--primary);
  transition: gap 0.2s ease;
}
.product-card:hover .product-link:not(.product-link--disabled) { gap: 10px; }
.product-link--disabled { color: var(--ink-3); font-weight: 500; }

/* ── Footprint ────────────────────────────────────── */
.footprint {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 96px;
}
.footprint-item {}
.footprint-kicker {
  margin: 0 0 14px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}
.footprint-item h3 {
  margin: 0 0 14px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.4px;
  line-height: 1.25;
  color: var(--ink);
}
.footprint-item p {
  margin: 0;
  max-width: 460px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ── Contact ──────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 56px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 80px;
}
.contact-item {}
.contact-kicker {
  margin: 0 0 12px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}
.contact-item h3 {
  margin: 0 0 10px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink-2);
  letter-spacing: -0.1px;
}
.contact-value {
  display: inline-block;
  margin: 0;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  letter-spacing: -0.3px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
a.contact-value:hover { border-bottom-color: var(--ink); }

.address-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 96px;
  margin: 0 0 32px;
}
.address-kicker {
  margin: 0 0 12px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}
.address-grid h3 {
  margin: 0 0 10px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
  letter-spacing: -0.3px;
}
.address-grid p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
}
.address-grid p + p { margin-top: 4px; }

/* ── Prose / Legal docs ───────────────────────────── */
.prose {
  max-width: 760px;
}
.prose h2 {
  margin: 56px 0 18px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 24px;
  color: var(--ink);
  letter-spacing: -0.4px;
}
.prose h2:first-child { margin-top: 0; }
.prose p {
  margin: 0 0 18px;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.85;
}
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul { padding-left: 22px; margin: 0 0 18px; color: var(--ink-2); }
.prose li { font-size: 16px; line-height: 1.85; margin-bottom: 6px; }
.prose a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color 0.15s ease; }
.prose a:hover { border-bottom-color: var(--primary); }
.prose .note {
  margin-top: 36px;
  padding: 18px 20px;
  background: var(--surface-alt);
  border-radius: 10px;
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.65;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 36px;
}
.legal-table th,
.legal-table td {
  padding: 16px 0;
  text-align: left;
  font-size: 15px;
  border-bottom: 1px solid var(--hairline);
}
.legal-table tr:first-child th,
.legal-table tr:first-child td { border-top: 1px solid var(--hairline); }
.legal-table th {
  color: var(--ink-3);
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  width: 36%;
  vertical-align: top;
  padding-right: 24px;
}
.legal-table td {
  color: var(--ink);
  font-weight: 500;
}
.legal-table a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color 0.15s ease; }
.legal-table a:hover { border-bottom-color: var(--primary); }

.about-products {
  list-style: none;
  padding: 0;
  margin: 0;
}
.about-products li {
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 15.5px;
  color: var(--ink-2);
  line-height: 1.65;
}
.about-products li:first-child { border-top: 1px solid var(--hairline); }
.about-products strong { color: var(--ink); margin-right: 10px; font-weight: 700; }
.about-products a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color 0.15s ease; }
.about-products a:hover { border-bottom-color: var(--primary); }

/* ── Footer ───────────────────────────────────────── */
.site-footer {
  padding: 80px 0 44px;
  border-top: 1px solid var(--hairline);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 56px;
}
.footer-brand .brand { margin-bottom: 22px; }
.footer-legal-name {
  margin: 0 0 4px;
  font-family: 'Noto Sans SC', 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 14.5px;
  color: var(--ink);
}
.footer-addr {
  margin: 0 0 14px;
  font-size: 13.5px;
  color: var(--ink-2);
}
.footer-meta {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-3);
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  letter-spacing: 0.1px;
}
.footer-h {
  margin: 0 0 14px;
  font-family: 'Noto Sans SC', 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}
.site-footer p { margin: 0 0 8px; font-size: 13.5px; color: var(--ink-2); line-height: 1.65; }
.site-footer a { color: var(--ink-2); }
.site-footer a:hover { color: var(--ink); }
.footer-copy {
  padding-top: 36px;
  border-top: 1px solid var(--hairline);
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.1px;
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 900px) {
  .container { padding: 0 32px; }
  .hero { padding: 80px 0 80px; }
  .hero h1 { font-size: clamp(40px, 9vw, 68px); letter-spacing: -1.6px; }
  .hero .lead { font-size: 18px; margin-bottom: 44px; }
  .hero-cta { margin-bottom: 72px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .product-grid { grid-template-columns: 1fr; }
  .footprint { grid-template-columns: 1fr; gap: 56px; }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .address-grid { grid-template-columns: 1fr; gap: 44px; }
  .section { padding: 88px 0; }
  .section-head { margin-bottom: 56px; }
}
@media (max-width: 640px) {
  .container { padding: 0 24px; }
  .site-header { padding: 18px 0; }
  .site-nav { display: none; }
  .hero { padding: 56px 0 64px; }
  .hero h1 { font-size: 40px; letter-spacing: -1.2px; }
  .hero .lead { font-size: 16.5px; }
  .hero-cta { gap: 8px; margin-bottom: 56px; }
  .btn { padding: 12px 20px; font-size: 14.5px; }
  .hero-stats { grid-template-columns: 1fr; gap: 24px; padding-top: 32px; }
  .hero-stats dd { font-size: 19px; }
  .page-hero { padding: 64px 0 48px; }
  .page-hero h1 { font-size: 34px; letter-spacing: -1px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 48px; }
  .product-card { padding: 28px 24px; }
  .product-name { font-size: 26px; }
  .footprint-item h3 { font-size: 26px; }
  .contact-value { font-size: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}