/* 匠倍（上海）网络科技 - 官网样式（配色与 logo 绿色一致）*/
:root {
  --color-bg: #0d1310;
  --color-surface: #161f1a;
  --color-surface-alt: #1e2d26;
  --color-text: #e4ede8;
  --color-text-muted: #8a9c92;
  --color-accent: #2e8b5a;
  --color-accent-hover: #237a44;
  --color-accent-light: rgba(107, 196, 74, 0.15);
  --color-border: #2a3d34;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius: 8px;
  --radius-lg: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 19, 16, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: flex;
  align-items: center;
  padding: 6px 10px;
  margin: -6px 0;
  background: #fff;
  border-radius: var(--radius);
  text-decoration: none;
}

.logo img {
  display: block;
  height: 32px;
  width: auto;
}

.nav {
  display: flex;
  gap: var(--space-lg);
}

.nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(56px + var(--space-2xl)) var(--space-md) var(--space-2xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(46, 139, 90, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(107, 196, 74, 0.1), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: 500;
  margin: 0 0 var(--space-md);
}

.hero-desc {
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-xl);
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.hero-scroll .arrow {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Sections */
.section {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 var(--space-xl);
  text-align: center;
  color: var(--color-text);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.about-icon {
  color: var(--color-accent);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.about-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm);
}

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

/* Services */
.services-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 640px;
  margin: 0 auto;
}

.services-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.services-list li:last-child {
  border-bottom: none;
}

.services-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 0.5rem;
  border-radius: 50%;
  background: var(--color-accent);
}

.services-list strong {
  color: var(--color-text);
  min-width: 10em;
}

/* Project types（仅展示类型，不展示项目名称）*/
.project-types-desc {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 520px;
  margin: 0 auto var(--space-lg);
}

.project-types-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.project-type-tag {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--color-text);
}

/* Contact */
.contact-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 480px;
  margin: 0 auto;
}

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

.contact-box p strong {
  color: var(--color-text);
}

.contact-note {
  margin-top: var(--space-md) !important;
  font-size: 0.9rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0 0;
}

.contact-list li {
  margin-bottom: var(--space-xs);
}

.contact-list a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

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

.footer-icp {
  margin-top: var(--space-xs);
}

.footer-icp a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-links {
  margin-top: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-sep {
  margin: 0 var(--space-xs);
  color: var(--color-text-muted);
}

.nav-current {
  color: var(--color-accent) !important;
}

/* 子页面 */
.page-sub .header {
  position: relative;
}

.main-sub {
  padding: var(--space-2xl) 0;
  min-height: 60vh;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 var(--space-lg);
  color: var(--color-text);
}

.page-lead {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  font-size: 0.95rem;
}

.loading {
  color: var(--color-text-muted);
}

.about-page-content .about-slogan {
  font-size: 1.15rem;
  color: var(--color-accent);
  font-weight: 500;
  margin: 0 0 var(--space-xs);
}

.about-page-content .about-tagline {
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
  font-size: 0.95rem;
}

.about-page-content .about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.about-page-content .about-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm);
}

.services-page-list,
.types-page-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.services-page-item,
.types-page-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.services-page-item:last-child,
.types-page-item:last-child {
  border-bottom: none;
}

.services-page-item strong,
.types-page-item .project-type-tag {
  color: var(--color-text);
  display: inline-block;
  margin-bottom: var(--space-xs);
}

.types-page-item .project-type-tag {
  margin-bottom: var(--space-sm);
}

.services-page-item p,
.types-page-item p {
  margin: 0;
}

.container-narrow {
  max-width: 720px;
}

.privacy-content {
  font-size: 0.95rem;
  line-height: 1.75;
}

.privacy-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--color-text);
}

.privacy-content p,
.privacy-content ul {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.privacy-content ul {
  padding-left: 1.25rem;
}

.privacy-content li {
  margin-bottom: var(--space-xs);
}

.privacy-content a {
  color: var(--color-accent);
  text-decoration: none;
}

.privacy-content a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  .nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: var(--space-md);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-sm);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
  }

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

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: var(--space-xl) 0;
  }
}