/* ============================================
   卓耘科技 - 企业官网样式
   Domain: zhuoyunit.cn
   ============================================ */

/* ---- CSS Variables ---- */
:root {
  --color-bg: #f9fafb;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #64748b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-light: #eff6ff;
  --color-border: #e2e8f0;
  --color-dark: #0f172a;
  --max-width: 1200px;
  --header-height: 72px;
  --section-padding: 80px 0;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

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

.section {
  padding: var(--section-padding);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 56px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

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

/* ---- Header & Navigation ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.2s ease;
}

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

.nav .btn {
  margin-left: 12px;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ---- Hero Section ---- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  animation: fadeInUp 0.8s ease forwards;
}

.hero-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--color-dark);
}

.hero h1 span {
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  animation: fadeInRight 0.8s ease 0.2s both;
}

.hero-card {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--color-border);
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--color-bg);
  border-radius: 12px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ---- Features / Services Section ---- */
.features {
  background: var(--color-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  background: var(--color-surface);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.1);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-accent);
  font-size: 1.3rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---- Products Section ---- */
.products {
  background: var(--color-bg);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--color-surface);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.product-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.product-img {
  height: 200px;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, #dbeafe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-accent);
}

.product-body {
  padding: 24px;
}

.product-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-body p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ---- About Page ---- */
.about-hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
  text-align: center;
}

.about-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.about-hero p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.8;
}

.about-content {
  padding: 80px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.about-grid:nth-child(even) {
  direction: rtl;
}

.about-grid:nth-child(even) > * {
  direction: ltr;
}

.about-text h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.about-text p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-visual {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--color-border);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--color-accent-light);
}

/* ---- Team Section ---- */
.team {
  background: var(--color-bg);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.team-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--color-surface);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.team-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 2rem;
  color: var(--color-accent);
}

.team-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-card span {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ---- Contact Page ---- */
.contact-hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
  text-align: center;
}

.contact-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.contact-hero p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

.contact-content {
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--color-accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.contact-item h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* Contact Form */
.contact-form {
  background: var(--color-surface);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--color-border);
}

.contact-form h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s ease;
  background: var(--color-surface);
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Footer ---- */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.6);
}

.footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .features-grid,
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }

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

  .nav a {
    width: 100%;
    padding: 12px 16px;
  }

  .nav .btn {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

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

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

  .about-grid:nth-child(even) {
    direction: ltr;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .section-title {
    font-size: 1.6rem;
  }

  .about-hero h1,
  .contact-hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}