:host {
  --primary: #ff6b6b;
  --primary-light: #ff8e8e;
  --primary-dark: #e55a5a;
  --secondary: #4ecdc4;
  --dark: #333;
  --gray: #666;
  --light-gray: #f5f5f5;
  --white: #fff;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background: linear-gradient(135deg, #fff5f5 0%, #fff0f0 100%);
  color: var(--dark);
  line-height: 1.6;
  padding-bottom: 80px;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Styles */
header {
  background: var(--white);
  padding: 15px 0 10px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--card-shadow);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 15px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.logo i {
  font-size: 22px;
}

.user-actions {
  display: flex;
  gap: 15px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  color: var(--gray);
  font-size: 16px;
  border: none;
  transition: var(--transition);
  cursor: pointer;
}

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

/* Featured Story */
.featured-story {
  margin: 15px;
  position: relative;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.featured-image {
  width: 100%;
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.featured-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent 50%);
}

.featured-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  color: var(--white);
  z-index: 2;
}

.featured-tag {
  background: var(--primary);
  color: var(--white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: bold;
  display: inline-block;
  margin-bottom: 10px;
}

.featured-title {
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 8px;
}

.featured-desc {
  font-size: 14px;
  opacity: 0.9;
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-stats {
  display: flex;
  gap: 15px;
  font-size: 12px;
  opacity: 0.9;
}

/* Category Navigation */
.category-nav {
  background: var(--white);
  border-radius: 12px;
  margin: 15px;
  padding: 15px 0;
  display: flex;
  justify-content: space-around;
  box-shadow: var(--card-shadow);
}

.category-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
}

.category-item:hover {
  transform: translateY(-5px);
}

.category-icon {
  width: 50px;
  height: 50px;
  background: rgba(255, 107, 107, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  transition: var(--transition);
}

.category-item.active .category-icon {
  background: var(--primary);
  color: var(--white);
}

.category-text {
  font-size: 13px;
  color: var(--gray);
}

/* Story Section */
.story-section {
  background: var(--white);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  margin: 15px;
  position: relative;
}

.story-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  border-bottom: 1px solid #f0f0f0;
}

.story-header h2 {
  font-size: 18px;
  color: var(--dark);
  position: relative;
  padding-left: 12px;
}

.story-header h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 16px;
  background: var(--primary);
  border-radius: 2px;
}

.story-header .more {
  color: var(--gray);
  font-size: 13px;
}

/* Story Card */
.story-card {
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  transition: var(--transition);
  animation: fadeIn 0.5s ease forwards;
}

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

.story-image {
  width: 100%;
  height: 180px;
  border-radius: 12px;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.story-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.5), transparent 50%);
}

.story-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  position: absolute;
  bottom: 15px;
  left: 15px;
  z-index: 2;
  max-width: 80%;
}

.story-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--gray);
}

.story-stats {
  display: flex;
  gap: 15px;
}

.story-stat {
  display: flex;
  align-items: center;
  gap: 5px;
}

.story-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.story-btn {
  flex: 1;
  padding: 10px 0;
  border-radius: 20px;
  text-align: center;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.read-btn:hover {
  background: var(--primary-dark);
}

.share-btn {
  background: rgba(255, 107, 107, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.share-btn:hover {
  background: rgba(255, 107, 107, 0.2);
}

/* Story Detail Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  background: var(--white);
  border-radius: 15px;
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  position: sticky;
  top: 0;
  background: var(--white);
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #f0f0f0;
  z-index: 2;
}

.modal-title {
  font-size: 18px;
  font-weight: bold;
}

.modal-close {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--primary);
  color: var(--white);
}

.modal-body {
  padding: 15px;
}

.modal-image {
  width: 100%;
  height: 200px;
  border-radius: 12px;
  background-size: cover;
  background-position: center;
  margin-bottom: 15px;
}

.modal-story-title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--primary);
}

.modal-story-content {
  font-size: 15px;
  line-height: 1.8;
  color: var(--dark);
  margin-bottom: 20px;
}

.modal-story-content p {
  margin-bottom: 15px;
}

.modal-footer {
  padding: 15px;
  border-top: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-actions {
  display: flex;
  gap: 10px;
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--white);
  display: flex;
  border-top: 1px solid #eee;
  z-index: 100;
}

.nav-item {
  flex: 1;
  text-align: center;
  padding: 12px 0;
  color: var(--gray);
  font-size: 12px;
  position: relative;
  cursor: pointer;
}

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

.nav-item.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
}

.nav-item i {
  font-size: 20px;
  margin-bottom: 4px;
}

/* Animation */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 480px) {
  .category-icon {
    width: 42px;
    height: 42px;
    font-size: 18px;
  }
  
  .featured-title {
    font-size: 18px;
  }
  
  .featured-desc {
    font-size: 13px;
  }
}