/* yuanlai_consulting_website/frontend/css/style.css */
:root {
  --primary: #6e45e2;
  --primary-light: #9d8bf1;
  --primary-dark: #4d2bc9;
  --secondary: #88d3ce;
  --secondary-light: #b5e6e2;
  --secondary-dark: #5cb8b2;
  --dark: #1a1a2e;
  --light: #f5f7fa;
  --gray: #e4e8eb;
  --gray-dark: #6c757d;
}

@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 400;
  src: url(https://fonts.loli.net/css2?family=Noto+Serif+SC:wght@400&display=swap);
}

@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 700;
  src: url(https://fonts.loli.net/css2?family=Noto+Serif+SC:wght@700&display=swap);
}

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

body {
  font-family: 'Noto Serif SC', serif;
  color: var(--dark);
  background: linear-gradient(135deg, var(--light) 0%, var(--gray) 100%);
  min-height: 100vh;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.navbar {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo svg {
  height: 40px;
  width: 40px;
  color: var(--primary);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  margin-left: 0.75rem;
  color: var(--dark);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  position: relative;
  font-weight: 500;
  font-size: 1.1rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 8rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  color: white;
}

.hero-text p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
}

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

.btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

.hero-image {
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  transform: rotate(2deg);
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-title p {
  font-size: 1.25rem;
  color: var(--gray-dark);
  max-width: 700px;
  margin: 0 auto;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: white;
  border-radius: 0.5rem;
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: white;
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.gallery-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.gallery-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover .gallery-image {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 100%);
  color: white;
  padding: 2rem 1.5rem 1.5rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  width: 50%;
  padding: 0 2rem;
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-dot {
  position: absolute;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background-color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -0.75rem;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -0.75rem;
}

.timeline-content {
  background: white;
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Form */
.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--gray);
  border-radius: 0.375rem;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(110, 69, 226, 0.2);
  outline: none;
}

.form-label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  color: var(--gray-dark);
  pointer-events: none;
  transition: all 0.3s ease;
}

.form-control:focus + .form-label,
.form-control:not(:placeholder-shown) + .form-label {
  transform: translateY(-1.5rem) scale(0.85);
  color: var(--primary);
}

/* Footer */
.footer {
  background-color: var(--dark);
  color: white;
  padding: 4rem 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.footer-logo svg {
  height: 2rem;
  width: 2rem;
  color: var(--secondary);
}

.footer-logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  margin-left: 0.5rem;
}

.footer-links h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
  color: white;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.8s ease-out forwards;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .timeline::before {
    left: 2rem;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 4rem;
    padding-right: 0;
  }
  
  .timeline-item:nth-child(even) {
    left: 0;
  }
  
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 1.25rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .hero-text p {
    font-size: 1.1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .section-title p {
    font-size: 1.1rem;
  }
}