:root {
  --primary-color: #e53935;
  --primary-light: #ff6f60;
  --primary-dark: #ab000d;
  --accent-color: #ffd700;
  --accent-light: #ffff52;
  --accent-dark: #c7a600;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-light: #ffffff;
  --background-light: #ffffff;
  --background-gray: #f5f5f5;
  --border-color: #e0e0e0;
  --shadow-color: rgba(0, 0, 0, 0.1);

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;

  --transition-speed: 0.3s;
  
  --container-width: 1200px;

  font-family: "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  line-height: 1.6;
  font-weight: 400;

  color-scheme: light;
  color: var(--text-primary);
  background-color: var(--background-light);

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
}

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

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

/* Header Styles */
.header {
  position: sticky;
  top: 0;
  background-color: var(--background-light);
  box-shadow: 0 2px 10px var(--shadow-color);
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

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

.primary-text {
  color: var(--primary-color);
}

.accent-text {
  color: var(--accent-color);
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
}

.nav-menu a {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

.nav-menu a:hover, 
.nav-menu a.active {
  color: var(--primary-color);
  background-color: rgba(229, 57, 53, 0.1);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.search-box {
  display: flex;
  align-items: center;
  position: relative;
}

.search-box input {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  width: 200px;
  font-size: 0.9rem;
}

.search-box button {
  position: absolute;
  right: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: var(--spacing-xs);
}

/* Banner Styles */
.banner {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--text-light);
  padding: var(--spacing-xxl) 0;
  margin-bottom: var(--spacing-xl);
}

.banner-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.banner-content h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.banner-content p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

.banner-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-weight: 500;
  transition: all var(--transition-speed) ease;
}

.btn i {
  margin-left: var(--spacing-xs);
}

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

.btn-primary:hover {
  background-color: var(--accent-dark);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Section Styles */
.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.section-title i {
  color: var(--primary-color);
}

/* Trending Section */
.trending-section {
  margin-bottom: var(--spacing-xxl);
}

.trending-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.featured-news {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: transform var(--transition-speed) ease;
}

.featured-news:hover {
  transform: translateY(-5px);
}

.featured-image {
  position: relative;
}

.featured-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.hot-tag {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.featured-content {
  padding: var(--spacing-lg);
  background-color: var(--background-light);
}

.news-category {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.featured-content h3 {
  font-size: 1.4rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.featured-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.news-meta {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.read-more {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  font-weight: 500;
}

.read-more i {
  margin-left: var(--spacing-xs);
  transition: transform var(--transition-speed) ease;
}

.read-more:hover i {
  transform: translateX(3px);
}

.trending-list {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-md);
}

.news-card {
  display: flex;
  background-color: var(--background-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: 0 2px 10px var(--shadow-color);
  transition: transform var(--transition-speed) ease;
}

.news-card:hover {
  transform: translateY(-3px);
}

.news-img {
  width: 35%;
}

.news-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-content {
  width: 65%;
  padding: var(--spacing-md);
}

.news-content h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

/* Categories Section */
.categories-section {
  margin-bottom: var(--spacing-xxl);
}

.categories-wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.category-column {
  background-color: var(--background-light);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 15px var(--shadow-color);
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.category-title {
  font-size: 1.3rem;
  margin: 0;
}

.more-link {
  color: var(--primary-color);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
}

.more-link i {
  margin-left: var(--spacing-xs);
  transition: transform var(--transition-speed) ease;
}

.more-link:hover i {
  transform: translateX(3px);
}

.category-content {
  padding: var(--spacing-lg);
}

.category-card {
  margin-bottom: var(--spacing-lg);
}

.card-img {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.card-img img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform var(--transition-speed) ease;
}

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

.card-content h4 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.card-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.category-list-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.category-list-item:last-child {
  border-bottom: none;
}

.list-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: var(--primary-light);
  color: var(--text-light);
  border-radius: 50%;
  font-size: 0.8rem;
  margin-right: var(--spacing-sm);
  font-weight: 600;
}

.list-content {
  flex: 1;
}

.list-content h5 {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.list-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Variety Section */
.variety-section {
  margin-bottom: var(--spacing-xxl);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.view-all {
  color: var(--primary-color);
  display: flex;
  align-items: center;
  font-size: 0.95rem;
}

.view-all i {
  margin-left: var(--spacing-xs);
  transition: transform var(--transition-speed) ease;
}

.view-all:hover i {
  transform: translateX(3px);
}

.variety-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.variety-card {
  background-color: var(--background-light);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 15px var(--shadow-color);
  transition: transform var(--transition-speed) ease;
}

.variety-card:hover {
  transform: translateY(-5px);
}

.variety-img {
  position: relative;
}

.variety-img img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.variety-tag {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background-color: var(--accent-color);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.variety-content {
  padding: var(--spacing-md);
}

.variety-content h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.variety-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.variety-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Subscribe Section */
.subscribe-section {
  margin-bottom: var(--spacing-xxl);
  background-color: var(--background-gray);
  padding: var(--spacing-xl) 0;
}

.subscribe-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.subscribe-content h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.subscribe-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 1.1rem;
}

.subscribe-form {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.subscribe-form input {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-size: 1rem;
}

.social-icons {
  display: flex;
  gap: var(--spacing-md);
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--background-light);
  color: var(--primary-color);
  border-radius: 50%;
  font-size: 1.2rem;
  transition: all var(--transition-speed) ease;
}

.social-icon:hover {
  background-color: var(--primary-color);
  color: var(--text-light);
  transform: translateY(-3px);
}

.subscribe-image img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-radius: var(--border-radius-lg);
}

/* Footer Styles */
.footer {
  background-color: #1f1f1f;
  color: var(--text-light);
  padding-top: var(--spacing-xxl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--accent-color);
}

.footer-column p {
  margin-bottom: var(--spacing-md);
  opacity: 0.8;
  font-size: 0.95rem;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  opacity: 0.8;
  transition: all var(--transition-speed) ease;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--accent-color);
  padding-left: var(--spacing-xs);
}

.app-download {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.app-download img {
  border-radius: var(--border-radius-sm);
}

.app-download p {
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  :root {
    --container-width: 960px;
  }
  
  .trending-wrapper {
    grid-template-columns: 1fr;
  }
  
  .variety-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --container-width: 100%;
  }
  
  .header-content {
    flex-wrap: wrap;
  }
  
  .logo {
    margin-bottom: var(--spacing-sm);
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 70%;
    height: 100vh;
    background-color: var(--background-light);
    flex-direction: column;
    padding: var(--spacing-xxl) var(--spacing-lg);
    transition: left var(--transition-speed) ease;
    z-index: 1001;
    box-shadow: 2px 0 10px var(--shadow-color);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu a {
    padding: var(--spacing-md);
    display: block;
  }
  
  .search-box {
    width: 100%;
    margin-top: var(--spacing-sm);
    order: 3;
  }
  
  .search-box input {
    width: 100%;
  }
  
  .categories-wrapper {
    grid-template-columns: 1fr;
  }
  
  .subscribe-wrapper {
    grid-template-columns: 1fr;
  }
  
  .subscribe-image {
    display: none;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .banner-content h2 {
    font-size: 2rem;
  }
  
  .banner-content p {
    font-size: 1rem;
  }
  
  .banner-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .variety-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}