/* ===================================
   迈瑞科技大厦 - 全局样式
   科技简约风格
   =================================== */

/* CSS Custom Properties */
:root {
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-primary-light: #e0f2fe;
  --color-primary-bg: #f0f9ff;
  --color-accent: #06b6d4;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
}

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

ul,
ol {
  list-style: none;
}

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Sections */
.section {
  padding: 90px 0;
}

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

.bg-gradient {
  background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-bg) 100%);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 56px;
  text-align: center;
  letter-spacing: -0.01em;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  margin: 20px auto 0;
  border-radius: 2px;
}

/* ===================================
   Header
   =================================== */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.logo a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

.logo a:hover {
  opacity: 0.8;
}

.header-contact {
  display: flex;
  align-items: center;
}

.phone-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-bg);
  transition: all var(--transition);
}

.phone-link:hover {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.phone-icon {
  font-size: 1.3rem;
}

/* Nav */
.nav {
  border-top: 1px solid var(--color-border);
}

.nav-list {
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 0;
}

.nav-item a {
  display: block;
  padding: 14px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-item a::after {
  content: "";
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition);
  border-radius: 1px;
}

.nav-item a:hover::after,
.nav-item.active a::after {
  width: 60%;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--color-primary);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.mobile-menu-btn:hover {
  background: var(--color-bg-alt);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===================================
   Banner
   =================================== */
.banner {
  position: relative;
  min-height: 600px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(14, 165, 233, 0.4));
}

.banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 40px 24px;
}

.banner-title {
  font-size: 3.75rem;
  font-weight: 900;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  animation: fadeInUp 0.8s ease;
}

.banner-subtitle {
  font-size: 1.35rem;
  margin-bottom: 40px;
  opacity: 0.95;
  font-weight: 400;
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.banner-cta {
  display: inline-block;
  padding: 18px 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

.banner-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.5);
  color: #fff;
}

/* ===================================
   Highlights
   =================================== */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.highlight-item {
  text-align: center;
  padding: 36px 24px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.highlight-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition);
}

.highlight-item:hover::before {
  transform: scaleX(1);
}

.highlight-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.highlight-title {
  font-size: 2.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.highlight-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ===================================
   Intro
   =================================== */
.intro-content {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 850px;
  margin: 0 auto 40px;
}

.intro-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 750px;
  margin: 0 auto;
}

.feature-item {
  font-size: 1rem;
  color: var(--color-text);
  padding: 20px 24px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-border);
  transition: all var(--transition);
  font-weight: 500;
}

.feature-item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  transform: translateX(4px);
}

/* ===================================
   Info Grid
   =================================== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.info-item {
  padding: 28px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
}

.info-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition);
}

.info-item:hover::after {
  transform: scaleX(1);
}

.info-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
  transform: translateY(-4px);
}

.info-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.info-value {
  display: block;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ===================================
   Building Blocks
   =================================== */
.building-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.building-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-border);
  transition: all var(--transition);
}

.building-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.building-image {
  height: 240px;
  background: var(--color-bg-alt);
  overflow: hidden;
}

.building-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.building-card:hover .building-image img {
  transform: scale(1.05);
}

.building-content {
  padding: 28px;
}

.building-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
}

.building-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.building-tag {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--color-primary-bg), var(--color-primary-light));
  color: var(--color-primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===================================
   Page Header
   =================================== */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: #fff;
  padding: 72px 0 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

.page-header h1 {
  font-size: 2.75rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  font-size: 0.9rem;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: #fff;
}

.breadcrumb a:hover {
  text-decoration: underline;
  opacity: 1;
}

/* ===================================
   Contact
   =================================== */
.contact-card {
  max-width: 760px;
  margin: 0 auto;
  background: var(--color-bg);
  padding: 48px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.contact-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 40px;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-info {
  display: grid;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-border);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.contact-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-phone {
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-phone:hover {
  opacity: 0.8;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--color-text);
  font-weight: 500;
}

/* Map */
.map-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.map-image {
  width: 100%;
  height: auto;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--color-bg-dark);
  color: #cbd5e1;
  padding: 64px 0 28px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
  margin-bottom: 48px;
}

.footer-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #f1f5f9;
  letter-spacing: 0.01em;
  position: relative;
  padding-bottom: 12px;
}

.footer-section h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.footer-section p {
  font-size: 0.9rem;
  color: #94a3b8;
  margin-bottom: 10px;
  line-height: 1.7;
}

.footer-section ul li {
  margin-bottom: 10px;
}

.footer-section ul li a {
  font-size: 0.9rem;
  color: #94a3b8;
  transition: all var(--transition);
  display: inline-block;
}

.footer-section ul li a:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

.friend-links {
  padding: 28px 0;
  border-top: 1px solid #1e293b;
  margin-top: 20px;
}

.friend-links h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 16px;
  text-align: center;
}

.friend-links-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.friend-links-list a {
  font-size: 0.85rem;
  color: #64748b;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  border: 1px solid transparent;
}

.friend-links-list a:hover {
  color: var(--color-primary);
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--color-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #1e293b;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: #475569;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.section {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.7s ease forwards;
}

.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.2s; }
.section:nth-child(4) { animation-delay: 0.3s; }
.section:nth-child(5) { animation-delay: 0.4s; }

/* ===================================
   Responsive
   =================================== */

/* Tablet */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav.active {
    max-height: 500px;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-item a {
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .nav-item a::after {
    display: none;
  }

  .banner {
    min-height: 450px;
  }

  .banner-title {
    font-size: 2.5rem;
  }

  .banner-subtitle {
    font-size: 1.1rem;
  }

  .banner-cta {
    padding: 16px 36px;
    font-size: 1.05rem;
  }

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

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

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 40px;
  }

  .page-header h1 {
    font-size: 2.25rem;
  }
}

/* Mobile */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 16px;
  }

  .banner {
    min-height: 360px;
  }

  .banner-title {
    font-size: 2.25rem;
  }

  .banner-subtitle {
    font-size: 1rem;
  }

  .banner-cta {
    padding: 14px 28px;
    font-size: 1rem;
  }

  .highlights-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .intro-features {
    grid-template-columns: 1fr;
  }

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

  .contact-card {
    padding: 28px;
  }

  .contact-phone {
    font-size: 1.35rem;
  }

  .phone-link span.phone-number {
    display: none;
  }
}

/* Print */
@media print {
  .header,
  .footer,
  .mobile-menu-btn {
    display: none;
  }

  .banner {
    height: auto;
    background: none;
    color: var(--color-text);
  }

  .banner-overlay {
    display: none;
  }

  .section {
    opacity: 1;
    transform: none;
  }
}