/* Mobile-first · 文化艺术 · 稳重可靠 */
:root {
  --ink: #1a2332;
  --ink-soft: #2d3a4f;
  --gold: #b8956a;
  --gold-light: #d4bc94;
  --cream: #f7f4ef;
  --paper: #fdfcfa;
  --muted: #5c6573;
  --line: rgba(26, 35, 50, 0.1);
  --shadow: 0 12px 40px rgba(26, 35, 50, 0.08);
  --radius: 12px;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(253, 252, 250, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.logo img {
  width: 36px;
  height: 36px;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  padding: 1rem 1.5rem 1.5rem;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.site-nav a {
  display: block;
  padding: 0.75rem 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  border-bottom: 1px solid var(--line);
}

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

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 2rem) 0 4rem;
  overflow: hidden;
  background: linear-gradient(165deg, var(--cream) 0%, var(--paper) 45%, #ebe6de 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.55;
  object-fit: cover;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(184, 149, 106, 0.45);
  border-radius: 999px;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  max-width: 14ch;
}

.hero-lead {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--muted);
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--ink-soft);
  color: var(--paper);
  box-shadow: var(--shadow);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--cream);
}

.section-head {
  margin-bottom: 2.5rem;
  text-align: center;
}

.section-head h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  color: var(--ink);
}

.section-head p {
  margin: 0 auto;
  max-width: 32em;
  color: var(--muted);
  font-size: 0.95rem;
}

.about-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.about-text p {
  margin: 0 0 1rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

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

.stat-card {
  padding: 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}

.stat-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--gold);
  margin-bottom: 0.25rem;
}

.stat-card span {
  font-size: 0.8rem;
  color: var(--muted);
}

.services-grid {
  display: grid;
  gap: 1.25rem;
}

.service-card {
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.section-alt .service-card {
  background: var(--paper);
}

.service-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
}

.service-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--ink);
}

.service-card .subtitle {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--gold);
  font-weight: 500;
}

.service-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.advantages {
  display: grid;
  gap: 1.5rem;
}

.advantage-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.advantage-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--gold);
  border: 1px solid rgba(184, 149, 106, 0.5);
  border-radius: 50%;
}

.advantage-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.advantage-item p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-block {
  text-align: center;
  padding: 2rem;
  background: var(--ink);
  color: rgba(253, 252, 250, 0.85);
  border-radius: var(--radius);
}

.contact-block h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--paper);
}

.contact-block p {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.contact-block .company-name {
  font-size: 1rem;
  color: var(--gold-light);
  margin-bottom: 0.5rem;
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 2rem;
  background: #141b26;
  color: rgba(253, 252, 250, 0.65);
  font-size: 0.85rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  color: var(--paper);
  font-weight: 600;
}

.footer-icp {
  text-align: center;
  margin: 0 0 1rem;
}

.footer-icp a {
  color: rgba(253, 252, 250, 0.75);
  font-size: 0.9rem;
}

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

.footer-copy {
  text-align: center;
  margin: 0;
  font-size: 0.8rem;
  opacity: 0.7;
}

[v-cloak] {
  display: none;
}

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

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

  .site-nav ul {
    flex-direction: row;
    gap: 1.75rem;
  }

  .site-nav a {
    padding: 0;
    border: none;
    font-size: 0.875rem;
  }

  .about-grid {
    grid-template-columns: 1.2fr 1fr;
  }

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

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

  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .service-card.span-2 {
    grid-column: span 1;
  }
}

@media (min-width: 1200px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .service-card {
    padding: 1.25rem;
  }

  .service-card h3 {
    font-size: 1rem;
  }
}