/* 沈阳威士盾科技 — 企业门户样式 */
:root {
  --color-primary: #0d4f8b;
  --color-primary-dark: #083a66;
  --color-accent: #1a9fd4;
  --color-accent-light: #e8f6fc;
  --color-text: #1a2332;
  --color-text-muted: #5a6578;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7fb;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(13, 79, 139, 0.08);
  --shadow-md: 0 8px 30px rgba(13, 79, 139, 0.12);
  --radius: 12px;
  --max-width: 1180px;
  --header-height: 72px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
}

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

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

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: 0.3s;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.site-nav a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-text);
  font-size: 0.9375rem;
  border-radius: 8px;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  background: var(--color-accent-light);
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, #1565a8 100%);
  color: #fff;
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(26, 159, 212, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 1rem;
}

.hero-desc {
  font-size: 1.125rem;
  opacity: 0.92;
  margin-bottom: 2rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: #fff;
  color: var(--color-primary);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
  color: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: #1590c0;
  color: #fff;
}

/* Sections */
section {
  padding: 4.5rem 0;
}

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

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--color-text-muted);
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: -3rem;
  position: relative;
  z-index: 2;
}

.stat-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.stat-card .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-card .label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.25s, transform 0.25s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-icon {
  width: 52px;
  height: 52px;
  background: var(--color-accent-light);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.125rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* About preview */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-visual {
  background: linear-gradient(145deg, var(--color-accent-light), #fff);
  border-radius: var(--radius);
  padding: 3rem;
  border: 1px solid var(--color-border);
}

.about-visual h3 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.about-list {
  list-style: none;
  margin-top: 1.5rem;
}

.about-list li {
  padding: 0.6rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-muted);
}

.about-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* Contact strip */
.contact-strip {
  background: var(--color-primary);
  color: #fff;
  padding: 3rem 0;
}

.contact-strip-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.contact-strip h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.contact-strip p {
  opacity: 0.85;
}

.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

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

.contact-item .icon {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-item a {
  color: #fff;
}

.contact-item a:hover {
  opacity: 0.85;
}

/* Page banner (inner pages) */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 3.5rem 0;
  text-align: center;
}

.page-banner h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.page-banner p {
  opacity: 0.85;
}

.breadcrumb {
  margin-top: 1rem;
  font-size: 0.875rem;
  opacity: 0.75;
}

.breadcrumb a {
  color: #fff;
}

/* Content blocks */
.content-block {
  max-width: 800px;
  margin: 0 auto;
}

.content-block h2 {
  color: var(--color-primary);
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

.content-block h2:first-child {
  margin-top: 0;
}

.content-block p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.timeline {
  list-style: none;
  border-left: 3px solid var(--color-accent-light);
  padding-left: 1.5rem;
  margin: 2rem 0;
}

.timeline li {
  position: relative;
  padding-bottom: 1.5rem;
  color: var(--color-text-muted);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.65rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--color-accent-light);
}

.timeline strong {
  color: var(--color-text);
  display: block;
  margin-bottom: 0.25rem;
}

/* Contact page */
.contact-page-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--color-border);
}

.contact-card h3 {
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.contact-detail {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.contact-detail .label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 0.15rem;
}

.contact-detail .value {
  font-weight: 500;
}

.map-placeholder {
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  min-height: 320px;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  text-align: center;
  padding: 2rem;
}

/* Footer */
.site-footer {
  background: #0a1628;
  color: rgba(255, 255, 255, 0.75);
  padding: 3.5rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.8;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.875rem;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8125rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.55);
}

/* Responsive */
@media (max-width: 900px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 2rem;
  }

  .about-grid,
  .contact-page-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    display: none;
    box-shadow: var(--shadow-md);
  }

  .site-nav.open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    padding: 1rem;
  }

  .hero {
    padding: 3.5rem 0 4rem;
  }

  .stats-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .contact-strip-inner {
    flex-direction: column;
    text-align: center;
  }
}