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

:root {
  --bg-deep: #fcfbfa;
  --bg-card: #ffffff;
  --bg-elevated: #f5f1ea;
  --jade: #2f6b58;
  --jade-soft: rgba(61, 122, 101, 0.1);
  --gold: #b8954a;
  --gold-light: #2a2420;
  --text: #3a342e;
  --text-muted: #6d665c;
  --border: rgba(184, 149, 74, 0.28);
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --header-h: 4rem;
  --max-w: 72rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--jade);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.container {
  width: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-xl);
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 var(--space-sm);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-md);
  color: var(--gold-light);
}

.section-lead {
  color: var(--text-muted);
  max-width: 42rem;
  margin: 0 0 var(--space-lg);
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: rgba(252, 251, 250, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--gold-light);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
}

.brand img {
  width: 2.25rem;
  height: 2.25rem;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  margin-inline: 0.55rem;
  background: var(--gold);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  inset: var(--header-h) 0 0;
  padding: var(--space-md);
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
}

.site-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.site-nav a {
  display: block;
  padding: 0.65rem 0;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.site-nav a:hover {
  color: var(--gold);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.15) 0%,
    rgba(252, 251, 250, 0.55) 50%,
    var(--bg-deep) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-block: var(--space-2xl) var(--space-xl);
}

.hero-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  color: var(--gold);
  margin: 0 0 var(--space-sm);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 8vw, 3.25rem);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-md);
  color: var(--gold-light);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--text-muted);
  max-width: 32rem;
  margin: 0 0 var(--space-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  border-radius: 2px;
  border: 1px solid var(--gold);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--jade) 0%, #3d8a72 100%);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--gold);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  color: var(--jade);
  margin-left: 0;
  margin-top: var(--space-sm);
}

.btn-ghost:hover {
  background: rgba(61, 122, 101, 0.1);
  color: var(--jade);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
}

/* About */
.about-grid {
  display: grid;
  gap: var(--space-lg);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--jade-soft);
  border: 1px solid var(--border);
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--gold-light);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* Services */
.services-grid {
  display: grid;
  gap: var(--space-md);
}

.service-card {
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: 0 4px 24px rgba(42, 36, 32, 0.04);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.service-card:hover {
  border-color: rgba(184, 149, 74, 0.5);
  box-shadow: 0 8px 32px rgba(42, 36, 32, 0.08);
  transform: translateY(-2px);
}

.service-icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: var(--space-md);
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin: 0 0 var(--space-xs);
  color: var(--gold-light);
}

.service-tagline {
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.06em;
  margin: 0 0 var(--space-sm);
}

.service-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Advantages */
.advantages {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.advantage-list {
  display: grid;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: adv;
}

.advantage-list li {
  counter-increment: adv;
  padding: var(--space-md) var(--space-md) var(--space-md) 4rem;
  position: relative;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: 0 4px 20px rgba(42, 36, 32, 0.04);
}

.advantage-list li::before {
  content: counter(adv, decimal-leading-zero);
  position: absolute;
  left: var(--space-md);
  top: var(--space-md);
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--gold);
  opacity: 0.85;
}

.advantage-list h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin: 0 0 var(--space-xs);
  color: var(--gold-light);
}

.advantage-list p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Contact strip */
.contact-strip {
  text-align: center;
  padding-block: var(--space-lg);
}

.contact-strip p {
  margin: 0 0 var(--space-sm);
  color: var(--text-muted);
}

.contact-strip .location {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--gold-light);
}

/* Footer */
.site-footer {
  padding-block: var(--space-lg) var(--space-md);
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 var(--space-sm);
}

.footer-icp {
  margin: 0;
  font-size: 0.9rem;
}

.footer-icp a {
  color: var(--jade);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-icp a:hover {
  color: var(--gold);
}

.footer-copy {
  margin: var(--space-sm) 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  .btn-ghost {
    margin-left: var(--space-sm);
    margin-top: 0;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    inset: auto;
    padding: 0;
    background: transparent;
    border: none;
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: row;
    gap: var(--space-md);
  }

  .site-nav a {
    padding: 0.25rem 0;
    border: none;
    font-size: 0.82rem;
  }

  .about-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
  }

  .advantage-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-2xl);
  }

  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .service-card:hover {
    transform: none;
  }
}