/* ========================================
   蔚蓝家园 - 海洋保护科普网站 全局样式
   ======================================== */

/* === 字体引入 === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Noto+Serif+SC:wght@400;600;700&family=Playfair+Display:wght@400;600;700&display=swap');

/* === CSS变量 === */
:root {
  /* 色彩系统 */
  --color-primary: #0077B6;
  --color-secondary: #00B4D8;
  --color-accent: #90E0EF;
  --color-bg-light: #377ac1;
  --color-bg-dark: #03045E;
  --color-text: #023047;
  --color-text-light: #FFFFFF;
  --color-text-muted: #6B7280;
  --color-coral: #FF6B6B;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0, 119, 182, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 119, 182, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 119, 182, 0.2);
  --shadow-xl: 0 16px 48px rgba(0, 119, 182, 0.25);
  
  /* 字体 */
  --font-display: 'Noto Serif SC', 'Playfair Display', serif;
  --font-body: 'Noto Sans SC', sans-serif;
  
  /* 深海模式变量 */
  --deep-bg-primary: #000510;
  --deep-bg-secondary: #001020;
  --deep-bg-gradient-start: #000510;
  --deep-bg-gradient-end: #001a30;
  --deep-card-bg: rgba(0, 30, 60, 0.7);
  --deep-card-border: rgba(0, 200, 255, 0.3);
  --deep-text: #ffffff;
  --deep-text-muted: #b8e4f5;
  --deep-glow-cyan: rgba(0, 255, 255, 0.8);
  --deep-glow-blue: rgba(0, 150, 255, 0.8);
  --deep-glow-purple: rgba(150, 100, 255, 0.5);
}

/* === 深海模式样式 === */
body.deep-sea-mode {
  background: 
    radial-gradient(ellipse at 30% 10%, rgba(0, 200, 255, 0.08) 0%, transparent 40%),
    radial-gradient(ellipse at 70% 20%, rgba(255, 100, 200, 0.05) 0%, transparent 35%),
    radial-gradient(ellipse at 50% 80%, rgba(0, 255, 150, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 20% 50%, rgba(100, 150, 255, 0.04) 0%, transparent 60%),
    radial-gradient(circle at 80% 60%, rgba(0, 200, 200, 0.05) 0%, transparent 55%),
    linear-gradient(180deg, #000814 0%, #001224 20%, #001e36 40%, #002847 60%, #003258 80%, #003c6a 100%);
  background-attachment: fixed;
  background-size: cover;
  color: var(--deep-text);
}

body.deep-sea-mode .section-title {
  color: var(--deep-text);
}

body.deep-sea-mode .card {
  background: var(--deep-card-bg);
  border: 1px solid var(--deep-card-border);
  backdrop-filter: blur(10px);
}

body.deep-sea-mode .card:hover {
  border-color: var(--deep-glow-cyan);
  box-shadow: 0 0 20px var(--deep-glow-blue), 0 0 40px var(--deep-glow-cyan);
}

body.deep-sea-mode .card-title {
  color: var(--deep-text);
}

body.deep-sea-mode .card-desc {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .card-tag {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .page-header {
  background: rgba(0, 20, 40, 0.5);
}

body.deep-sea-mode .page-title {
  color: var(--deep-text);
}

body.deep-sea-mode .nav-link {
  color: rgba(255, 255, 255, 0.8);
}

body.deep-sea-mode .nav-link:hover {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .dropdown {
  background: rgba(0, 20, 40, 0.9);
}

body.deep-sea-mode .dropdown-item {
  color: rgba(255, 255, 255, 0.8);
}

body.deep-sea-mode .dropdown-item:hover {
  background: rgba(0, 150, 255, 0.2);
}

body.deep-sea-mode .filter-tab {
  background: rgba(0, 30, 60, 0.5);
  color: var(--deep-text);
  border-color: var(--deep-card-border);
}

body.deep-sea-mode .filter-tab.active {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
  color: var(--deep-bg-primary);
}

body.deep-sea-mode .filter-tab:hover {
  background: rgba(0, 150, 255, 0.3);
}

body.deep-sea-mode .info-card {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
  backdrop-filter: blur(10px);
}

body.deep-sea-mode .info-card-title {
  color: var(--deep-text);
  border-bottom-color: var(--deep-card-border);
}

body.deep-sea-mode .info-label {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .info-value {
  color: var(--deep-text);
}

body.deep-sea-mode .info-item {
  border-bottom-color: rgba(0, 200, 255, 0.1);
}

body.deep-sea-mode .detail-main h3 {
  color: var(--deep-text);
  border-bottom-color: var(--deep-card-border);
}

body.deep-sea-mode .detail-main p {
  color: var(--deep-text);
}

body.deep-sea-mode .detail-main ul li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .section {
  background: transparent;
}

body.deep-sea-mode .status-badge {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .status-endangered {
  background: rgba(239, 68, 68, 0.15);
  color: #F87171;
}

body.deep-sea-mode .status-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #FBBF24;
}

body.deep-sea-mode .status-success {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
}

body.deep-sea-mode .status-critical {
  background: rgba(239, 68, 68, 0.2);
  color: #EF4444;
}

body.deep-sea-mode .status-near {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
}

body.deep-sea-mode .footer {
  background: rgba(0, 5, 20, 0.9);
}

body.deep-sea-mode .footer-bottom {
  border-top-color: rgba(0, 200, 255, 0.1);
}

body.deep-sea-mode .detail-hero-overlay {
  background: linear-gradient(
    180deg,
    rgba(0, 5, 20, 0.4) 0%,
    rgba(0, 15, 35, 0.9) 100%
  );
}

body.deep-sea-mode .page-breadcrumb a {
  color: rgba(224, 247, 255, 0.7);
}

body.deep-sea-mode .page-breadcrumb a:hover {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .page-breadcrumb span {
  color: rgba(224, 247, 255, 0.5);
}

body.deep-sea-mode .detail-tag {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .detail-content {
  padding: var(--spacing-2xl) 0;
}

body.deep-sea-mode .detail-content .container {
  background: rgba(0, 10, 30, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  backdrop-filter: blur(5px);
}

body.deep-sea-mode .section-header {
  margin-bottom: var(--spacing-xl);
}

body.deep-sea-mode .section-subtitle {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .section-tagline {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .card-category {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .card-title {
  color: var(--deep-text);
}

body.deep-sea-mode .card-desc {
  color: var(--deep-text-muted);
}

body.deep-sea-mode h1, 
body.deep-sea-mode h2, 
body.deep-sea-mode h3, 
body.deep-sea-mode h4, 
body.deep-sea-mode h5, 
body.deep-sea-mode h6 {
  color: var(--deep-text);
}

body.deep-sea-mode p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode a {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode a:hover {
  color: var(--deep-glow-blue);
}

body.deep-sea-mode li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .text-primary {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .text-secondary {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .text-success {
  color: #34D399;
}

body.deep-sea-mode .text-warning {
  color: #FBBF24;
}

body.deep-sea-mode .text-danger {
  color: #F87171;
}

body.deep-sea-mode .container {
  color: var(--deep-text);
}

body.deep-sea-mode .nav-logo-text {
  color: var(--deep-text);
}

body.deep-sea-mode .nav-logo-text span {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .navbar {
  background: linear-gradient(180deg, rgba(0, 5, 20, 0.95) 0%, rgba(0, 10, 30, 0.9) 100%);
}

body.deep-sea-mode .navbar.scrolled {
  background: rgba(0, 5, 20, 0.98);
}

body.deep-sea-mode .dropdown {
  background: rgba(0, 10, 30, 0.95);
}

body.deep-sea-mode .dropdown-item:hover {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .member-name {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .member-role {
  color: rgba(0, 255, 255, 0.6);
}

/* 小组分工页面样式 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.team-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.team-avatar {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

.team-name {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.team-role {
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(55, 122, 193, 0.1);
  border-radius: var(--radius-lg);
  display: inline-block;
}

.team-desc {
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

.team-collaboration {
  text-align: center;
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-2xl);
  background: linear-gradient(135deg, rgba(55, 122, 193, 0.1) 0%, rgba(187, 219, 252, 0.1) 100%);
  border-radius: var(--radius-xl);
}

.team-collaboration h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.team-collaboration p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

body.deep-sea-mode .team-card {
  background: rgba(0, 30, 60, 0.8);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .team-name {
  color: var(--deep-text);
}

body.deep-sea-mode .team-role {
  color: var(--deep-glow-cyan);
  background: rgba(0, 150, 255, 0.15);
}

body.deep-sea-mode .team-desc {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .team-collaboration {
  background: rgba(0, 50, 100, 0.3);
}

body.deep-sea-mode .team-collaboration h3 {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .nav-toggle span {
  background: var(--deep-text);
}

body.deep-sea-mode .card-link {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .card-link:hover {
  color: var(--deep-glow-blue);
}

body.deep-sea-mode .card-badge {
  background: rgba(0, 150, 255, 0.8);
}

body.deep-sea-mode .footer-link {
  color: rgba(224, 247, 255, 0.6);
}

body.deep-sea-mode .footer-link:hover {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .footer-desc {
  color: rgba(224, 247, 255, 0.6);
}

body.deep-sea-mode .footer-title {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .brand-text {
  color: var(--deep-text);
}

body.deep-sea-mode .navbar-toggle span {
  background: var(--deep-text);
}

body.deep-sea-mode .navbar-menu {
  background: rgba(0, 5, 20, 0.98);
}

body.deep-sea-mode .classroom-hero {
  background: linear-gradient(180deg, rgba(0, 30, 60, 0.9) 0%, rgba(0, 50, 100, 0.8) 100%);
}

body.deep-sea-mode .game-card {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .game-card-header {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
}

body.deep-sea-mode .quiz-option {
  background: linear-gradient(180deg, rgba(0, 100, 150, 0.8) 0%, rgba(0, 150, 200, 0.4) 100%);
  border-color: var(--deep-card-border);
}

body.deep-sea-mode .quiz-option:hover {
  border-color: var(--deep-glow-cyan);
}

body.deep-sea-mode .quiz-question {
  color: var(--deep-text);
}

body.deep-sea-mode .quiz-progress-dot {
  background: rgba(0, 200, 255, 0.3);
}

body.deep-sea-mode .quiz-progress-dot.active {
  background: var(--deep-glow-cyan);
}

body.deep-sea-mode .quiz-score {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .sorting-modal {
  background: linear-gradient(180deg, rgba(0, 20, 40, 1) 0%, rgba(0, 40, 80, 1) 50%, rgba(0, 10, 30, 1) 100%);
}

body.deep-sea-mode .sorting-header {
  background: rgba(0, 50, 100, 0.3);
}

body.deep-sea-mode .sorting-tutorial {
  background: rgba(0, 30, 60, 0.9);
}

body.deep-sea-mode .sorting-tutorial h3 {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .sorting-tutorial p,
body.deep-sea-mode .sorting-tutorial .tips li {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-tutorial .tips {
  background: rgba(0, 100, 150, 0.2);
}

body.deep-sea-mode .sorting-start-btn {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
}

body.deep-sea-mode .sorting-close {
  background: rgba(0, 100, 150, 0.3);
}

body.deep-sea-mode .sorting-game-area {
  background: rgba(0, 20, 40, 0.5);
}

body.deep-sea-mode .news-item {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .news-title {
  color: var(--deep-text);
}

body.deep-sea-mode .news-desc {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .news-meta {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .about-content {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .about-content h2 {
  color: var(--deep-text);
}

body.deep-sea-mode .about-content p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .protection-card {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .protection-card h3 {
  color: var(--deep-text);
}

body.deep-sea-mode .protection-card p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .environment-card {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .environment-card h3 {
  color: var(--deep-text);
}

body.deep-sea-mode .environment-card p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .pollution-card {
  background: rgba(0, 30, 60, 0.7);
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .pollution-card h3 {
  color: var(--deep-text);
}

body.deep-sea-mode .pollution-card p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .btn-primary {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
  color: var(--deep-bg-primary);
}

body.deep-sea-mode .btn-secondary {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
  border-color: var(--deep-card-border);
}

body.deep-sea-mode .hero-content {
  color: var(--deep-text);
}

body.deep-sea-mode .hero-tagline {
  color: rgba(0, 255, 255, 0.7);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

body.deep-sea-mode .hero-title {
  color: var(--deep-text);
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), 0 0 60px rgba(0, 255, 255, 0.2);
}

body.deep-sea-mode .title-word {
  color: var(--deep-text);
}

body.deep-sea-mode .title-word-2 {
  color: var(--deep-text);
  text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

body.deep-sea-mode .hero-highlight {
  background: rgba(0, 50, 100, 0.4);
  border-color: rgba(0, 255, 255, 0.3);
}

body.deep-sea-mode .stat-icon {
  filter: drop-shadow(0 0 10px rgba(0, 255, 255, 0.5));
}

body.deep-sea-mode .stat-number {
  color: var(--deep-text);
  text-shadow: 0 0 30px rgba(0, 255, 255, 0.6), 0 0 60px rgba(0, 200, 255, 0.3);
}

body.deep-sea-mode .stat-unit {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .stat-label {
  color: rgba(0, 255, 255, 0.6);
}

body.deep-sea-mode .highlight-item {
  color: rgba(0, 255, 255, 0.9);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

body.deep-sea-mode .highlight-divider {
  color: rgba(0, 255, 255, 0.3);
}

body.deep-sea-mode .hero-subtitle {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .subtitle-word {
  text-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

body.deep-sea-mode .hero-scroll-hint span {
  color: rgba(0, 255, 255, 0.5);
}

body.deep-sea-mode .scroll-arrow {
  color: rgba(0, 255, 255, 0.4);
}

body.deep-sea-mode .hero-buttons .btn-primary {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
  color: var(--deep-bg-primary);
}

body.deep-sea-mode .hero-buttons .btn-secondary {
  background: rgba(0, 150, 255, 0.2);
  color: var(--deep-glow-cyan);
  border-color: var(--deep-glow-cyan);
}

body.deep-sea-mode .section-desc {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .card-content {
  color: var(--deep-text);
}

body.deep-sea-mode .card-image-overlay {
  background: rgba(0, 5, 20, 0.6);
}

body.deep-sea-mode .card-text {
  color: var(--deep-text);
}

body.deep-sea-mode .quiz-option span {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-waste {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-bin {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-bin-label {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .footer-links li a {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .footer-links li a:hover {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .footer-bottom p {
  color: rgba(224, 247, 255, 0.5);
}

body.deep-sea-mode .page-header p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .protection-card ul li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .environment-card ul li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .pollution-card ul li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .news-date {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .news-category {
  color: var(--deep-glow-cyan);
}

body.deep-sea-mode .about-list li {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .about-list li::before {
  background: var(--deep-glow-cyan);
}

body.deep-sea-mode .classroom-hero h1 {
  color: var(--deep-text);
}

body.deep-sea-mode .classroom-hero p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .game-card h3 {
  color: var(--deep-text);
}

body.deep-sea-mode .game-card p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .game-card-body {
  color: var(--deep-text);
}

body.deep-sea-mode .quiz-result h3 {
  color: var(--deep-text);
}

body.deep-sea-mode .quiz-result p {
  color: var(--deep-text-muted);
}

body.deep-sea-mode .quiz-result .btn-primary {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan));
}

body.deep-sea-mode .sorting-timer {
  background: rgba(239, 68, 68, 0.8);
}

body.deep-sea-mode .sorting-score {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-stats span {
  color: var(--deep-text);
}

body.deep-sea-mode .sorting-waste.emoji {
  color: var(--deep-text);
}

body.deep-sea-mode .quiz-feedback p {
  color: var(--deep-text);
}

body.deep-sea-mode .feature-card {
  background: rgba(0, 30, 60, 0.7) !important;
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .feature-icon {
  background: linear-gradient(135deg, var(--deep-glow-blue), var(--deep-glow-cyan)) !important;
}

body.deep-sea-mode .feature-number {
  background: var(--deep-glow-cyan);
  color: var(--deep-bg-primary);
}

body.deep-sea-mode .feature-title {
  color: var(--deep-text) !important;
}

body.deep-sea-mode .feature-desc {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .action-item {
  background: transparent !important;
}

body.deep-sea-mode .action-title {
  color: #ffffff !important;
}

body.deep-sea-mode .action-desc {
  color: #b8e4f5 !important;
}

body.deep-sea-mode .action-tips h4 {
  color: #ffffff !important;
}

body.deep-sea-mode .action-tips ul li {
  color: #b8e4f5 !important;
}

body.deep-sea-mode .action-tips {
  background: rgba(0, 50, 100, 0.3) !important;
}

body.deep-sea-mode .section[style*="background"] {
  background: transparent !important;
}

body.deep-sea-mode .section[style*="background"] .container {
  background: rgba(0, 20, 40, 0.5);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

body.deep-sea-mode div[style*="background: var(--color-text-light)"] {
  background: rgba(0, 30, 60, 0.7) !important;
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode div[style*="background: var(--color-text-light)"] h3 {
  color: var(--deep-text) !important;
}

body.deep-sea-mode div[style*="background: var(--color-text-light)"] h4 {
  color: var(--deep-glow-cyan) !important;
}

body.deep-sea-mode div[style*="background: var(--color-text-light)"] p {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .section-subtitle[style*="color: #023047"] {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .card-badge[style*="background: #DC2626"] {
  background: rgba(239, 68, 68, 0.8) !important;
  color: white !important;
}

body.deep-sea-mode .pollution-card {
  background: rgba(0, 30, 60, 0.7) !important;
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .pollution-card h3 {
  color: var(--deep-text) !important;
}

body.deep-sea-mode .pollution-card p {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .pollution-card ul li {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .protection-card {
  background: rgba(0, 30, 60, 0.7) !important;
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .protection-card h3 {
  color: var(--deep-text) !important;
}

body.deep-sea-mode .protection-card p {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .protection-card ul li {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .environment-card {
  background: rgba(0, 30, 60, 0.7) !important;
  border: 1px solid var(--deep-card-border);
}

body.deep-sea-mode .environment-card h3 {
  color: var(--deep-text) !important;
}

body.deep-sea-mode .environment-card p {
  color: var(--deep-text-muted) !important;
}

body.deep-sea-mode .environment-card ul li {
  color: var(--deep-text-muted) !important;
}

/* 生物发光卡片效果 */
body.deep-sea-mode .card.deep-sea {
  position: relative;
}

body.deep-sea-mode .card.deep-sea::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--deep-glow-cyan), var(--deep-glow-blue), var(--deep-glow-purple), var(--deep-glow-cyan));
  border-radius: var(--radius-lg);
  z-index: -1;
  animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

/* 深海粒子背景效果 */
.deep-sea-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.5s ease;
}

body.deep-sea-mode .deep-sea-particles {
  opacity: 1;
}

.deep-sea-particles::before {
  content: '';
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--deep-glow-cyan);
  border-radius: 50%;
  animation: particle-float 20s linear infinite;
  box-shadow: 
    100px 100px 2px var(--deep-glow-blue),
    200px 300px 3px var(--deep-glow-cyan),
    400px 150px 2px var(--deep-glow-purple),
    600px 400px 3px var(--deep-glow-blue),
    800px 200px 2px var(--deep-glow-cyan),
    300px 500px 3px var(--deep-glow-blue),
    500px 600px 2px var(--deep-glow-cyan),
    700px 350px 3px var(--deep-glow-purple),
    900px 100px 2px var(--deep-glow-blue),
    100px 550px 3px var(--deep-glow-cyan),
    450px 250px 2px var(--deep-glow-blue),
    650px 500px 3px var(--deep-glow-cyan);
}

@keyframes particle-float {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 0.8; }
  90% { opacity: 0.8; }
  100% { transform: translateY(-100vh) translateX(100px); opacity: 0; }
}

/* 气泡上升动画效果 */
.bubble-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.bubble {
  position: absolute;
  bottom: -20px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(173, 216, 230, 0.4) 50%, rgba(135, 206, 235, 0.1) 80%, transparent);
  border-radius: 50%;
  animation: bubble-rise linear infinite;
  box-shadow: 
    inset -2px -2px 4px rgba(255, 255, 255, 0.3),
    inset 2px 2px 4px rgba(255, 255, 255, 0.5);
}

.bubble::after {
  content: '';
  position: absolute;
  top: 15%;
  left: 20%;
  width: 30%;
  height: 30%;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  filter: blur(1px);
}

@keyframes bubble-rise {
  0% {
    transform: translateY(0) translateX(0) scale(0.8);
    opacity: 0;
  }
  5% {
    opacity: 0.4;
  }
  20% {
    transform: translateY(-20vh) translateX(5px) scale(0.9);
  }
  40% {
    transform: translateY(-40vh) translateX(-4px) scale(1);
  }
  60% {
    transform: translateY(-60vh) translateX(6px) scale(0.95);
  }
  80% {
    transform: translateY(-80vh) translateX(-3px) scale(0.9);
    opacity: 0.2;
  }
  100% {
    transform: translateY(-110vh) translateX(4px) scale(0.8);
    opacity: 0;
  }
}

/* 海草动画效果 */
.seaweed-container {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
}

body.deep-sea-mode .seaweed-container {
  opacity: 1;
  visibility: visible;
}

.seaweed {
  position: absolute;
  bottom: 0;
  width: 12px;
  height: 80px;
  background: linear-gradient(180deg, 
    rgba(0, 150, 100, 0.3) 0%, 
    rgba(0, 120, 80, 0.4) 50%, 
    rgba(0, 100, 60, 0.5) 100%);
  border-radius: 6px 6px 2px 2px;
  transform-origin: bottom center;
  animation: seaweed-sway ease-in-out infinite;
}

.seaweed::before,
.seaweed::after {
  content: '';
  position: absolute;
  background: inherit;
  border-radius: inherit;
}

.seaweed::before {
  width: 8px;
  height: 50%;
  top: 20%;
  left: -8px;
  transform: rotate(-30deg);
  transform-origin: right center;
  animation: seaweed-leaf-left ease-in-out infinite;
}

.seaweed::after {
  width: 8px;
  height: 40%;
  top: 35%;
  right: -8px;
  transform: rotate(30deg);
  transform-origin: left center;
  animation: seaweed-leaf-right ease-in-out infinite;
}

@keyframes seaweed-sway {
  0%, 100% {
    transform: rotate(-8deg);
  }
  50% {
    transform: rotate(8deg);
  }
}

@keyframes seaweed-leaf-left {
  0%, 100% {
    transform: rotate(-35deg);
  }
  50% {
    transform: rotate(-20deg);
  }
}

@keyframes seaweed-leaf-right {
  0%, 100% {
    transform: rotate(35deg);
  }
  50% {
    transform: rotate(20deg);
  }
}

.seaweed:nth-child(odd) {
  animation-duration: 4s;
}

.seaweed:nth-child(even) {
  animation-duration: 5s;
}

.seaweed:nth-child(3n) {
  animation-duration: 3.5s;
}

.seaweed:nth-child(4n) {
  animation-duration: 4.5s;
}

.seaweed:nth-child(odd)::before {
  animation-duration: 4s;
}

.seaweed:nth-child(even)::before {
  animation-duration: 5s;
}

.seaweed:nth-child(odd)::after {
  animation-duration: 4s;
}

.seaweed:nth-child(even)::after {
  animation-duration: 5s;
}

.seaweed.small {
  height: 50px;
  width: 8px;
}

.seaweed.medium {
  height: 70px;
  width: 10px;
}

.seaweed.large {
  height: 100px;
  width: 14px;
}

.seaweed.tall {
  height: 120px;
  width: 16px;
}

body.deep-sea-mode .seaweed {
  background: linear-gradient(180deg, 
    rgba(0, 200, 150, 0.3) 0%, 
    rgba(0, 150, 100, 0.4) 50%, 
    rgba(0, 100, 50, 0.5) 100%);
}

body.deep-sea-mode .seaweed::before,
body.deep-sea-mode .seaweed::after {
  background: inherit;
}

/* 小鱼游动动画 */
.fish-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 3;
  overflow: hidden;
}

.fish {
  position: absolute;
  font-size: 1.5rem;
  opacity: 1;
  animation: fish-swim linear infinite;
}

.fish.small {
  font-size: 1rem;
}

.fish.medium {
  font-size: 1.2rem;
}

.fish.large {
  font-size: 2rem;
}

@keyframes fish-swim {
  0% {
    transform: translateX(-100px) translateY(0) scaleX(1);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  25% {
    transform: translateX(calc(25vw)) translateY(-20px) scaleX(1);
  }
  50% {
    transform: translateX(calc(50vw)) translateY(15px) scaleX(1);
  }
  75% {
    transform: translateX(calc(75vw)) translateY(-10px) scaleX(1);
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateX(calc(100vw + 100px)) translateY(0) scaleX(1);
    opacity: 0;
  }
}

@keyframes fish-swim-reverse {
  0% {
    transform: translateX(calc(100vw + 100px)) translateY(0) scaleX(-1);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  25% {
    transform: translateX(calc(75vw)) translateY(20px) scaleX(-1);
  }
  50% {
    transform: translateX(calc(50vw)) translateY(-15px) scaleX(-1);
  }
  75% {
    transform: translateX(calc(25vw)) translateY(10px) scaleX(-1);
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateX(-100px) translateY(0) scaleX(-1);
    opacity: 0;
  }
}

body.deep-sea-mode .fish {
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.8), 0 0 20px rgba(0, 150, 255, 0.6);
  opacity: 1;
}

body.deep-sea-mode .fish.small {
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.6), 0 0 15px rgba(0, 150, 255, 0.4);
}

body.deep-sea-mode .fish.large {
  text-shadow: 0 0 15px rgba(0, 255, 255, 1), 0 0 30px rgba(0, 150, 255, 0.8);
}

/* 标题区域气泡装饰 */
.title-bubble-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 3;
  overflow: hidden;
}

.title-bubble {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.4), rgba(173, 216, 230, 0.2), transparent);
  animation: title-bubble-rise ease-in-out infinite;
}

@keyframes title-bubble-rise {
  0% {
    transform: translateY(100%) scale(0.5);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.5;
  }
  90% {
    opacity: 0.2;
  }
  100% {
    transform: translateY(-100%) scale(1.2);
    opacity: 0;
  }
}

body.deep-sea-mode .title-bubble {
  background: radial-gradient(circle at 30% 30%, rgba(0, 255, 255, 0.5), rgba(0, 150, 255, 0.3), transparent);
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

/* 海洋生态系统主图片 */
.ecosystem-main-image {
  position: relative;
  margin-top: var(--spacing-xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.ecosystem-main-image img {
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: cover;
  display: block;
  aspect-ratio: 16/9;
}

.ecosystem-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 30, 60, 0.7), transparent 50%);
}

/* === 三层分层悬浮设计 === */
.ocean-layers {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.layer-far {
  z-index: 1;
}

.layer-mid {
  z-index: 2;
}

.layer-near {
  z-index: 3;
}

/* 远景层 - 深海模糊珊瑚、远处小型鱼群 */
.far-coral {
  position: absolute;
  bottom: 0;
  width: 80px;
  height: 120px;
  background: radial-gradient(ellipse at center top, rgba(255, 100, 150, 0.15), rgba(255, 50, 100, 0.05) 70%, transparent);
  border-radius: 50% 50% 0 0;
  transform-origin: bottom center;
}

.far-fish {
  position: absolute;
  font-size: 16px;
  opacity: 0.3;
  animation: swim-far 40s linear infinite;
}

@keyframes swim-far {
  0% { transform: translateX(-100px) translateY(0); }
  25% { transform: translateX(calc(25vw)) translateY(-20px); }
  50% { transform: translateX(calc(50vw)) translateY(10px); }
  75% { transform: translateX(calc(75vw)) translateY(-15px); }
  100% { transform: translateX(calc(100vw + 100px)) translateY(5px); }
}

/* 中景层 - 水母、海龟、中型鱼群 */
.mid-jellyfish {
  position: absolute;
  font-size: 36px;
  opacity: 0.6;
  animation: float-jelly 25s ease-in-out infinite;
}

@keyframes float-jelly {
  0% { transform: translateX(-100px) translateY(10vh) scale(1); opacity: 0; }
  10% { opacity: 0.6; }
  50% { transform: translateX(calc(50vw)) translateY(30vh) scale(1.1); }
  90% { opacity: 0.6; }
  100% { transform: translateX(calc(100vw + 100px)) translateY(15vh) scale(0.9); opacity: 0; }
}

.mid-turtle {
  position: absolute;
  font-size: 48px;
  opacity: 0.7;
  animation: swim-turtle 35s linear infinite;
}

@keyframes swim-turtle {
  0% { transform: translateX(calc(100vw + 100px)) translateY(40vh) scaleX(-1); }
  100% { transform: translateX(-100px) translateY(45vh) scaleX(-1); }
}

.mid-fish {
  position: absolute;
  font-size: 24px;
  opacity: 0.5;
  animation: swim-mid 20s linear infinite;
}

@keyframes swim-mid {
  0% { transform: translateX(-100px) translateY(0); }
  33% { transform: translateX(calc(33vw)) translateY(15px); }
  66% { transform: translateX(calc(66vw)) translateY(-10px); }
  100% { transform: translateX(calc(100vw + 100px)) translateY(5px); }
}

/* 近景层 - 半透明气泡、细碎海草 */
.near-bubble {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.1) 60%, transparent);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: rise-bubble 18s ease-in infinite;
}

@keyframes rise-bubble {
  0% { transform: translateY(100vh) scale(1); opacity: 0; }
  10% { opacity: 0.5; }
  50% { transform: translateY(50vh) scale(0.9); }
  90% { opacity: 0.3; }
  100% { transform: translateY(-50px) scale(1.1); opacity: 0; }
}

.near-seaweed {
  position: absolute;
  bottom: 0;
  width: 8px;
  background: linear-gradient(to top, rgba(0, 150, 80, 0.4), rgba(0, 200, 100, 0.2));
  border-radius: 4px 4px 0 0;
  transform-origin: bottom center;
  animation: sway-seaweed 4s ease-in-out infinite;
}

.near-seaweed::before,
.near-seaweed::after {
  content: '';
  position: absolute;
  background: linear-gradient(to top, rgba(0, 150, 80, 0.3), rgba(0, 200, 100, 0.1));
  border-radius: 50%;
  animation: sway-leaf 3s ease-in-out infinite;
}

.near-seaweed::before {
  width: 15px;
  height: 6px;
  top: 30%;
  left: -10px;
  transform-origin: right center;
}

.near-seaweed::after {
  width: 15px;
  height: 6px;
  top: 50%;
  right: -10px;
  transform-origin: left center;
}

@keyframes sway-seaweed {
  0%, 100% { transform: rotate(-5deg); }
  50% { transform: rotate(5deg); }
}

@keyframes sway-leaf {
  0%, 100% { transform: rotate(-8deg); }
  50% { transform: rotate(8deg); }
}

/* 深海模式下的发光效果 */
body.deep-sea-mode .far-coral {
  background: radial-gradient(ellipse at center top, rgba(0, 255, 255, 0.2), rgba(0, 200, 255, 0.1) 70%, transparent);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
}

body.deep-sea-mode .far-fish {
  color: rgba(0, 200, 255, 0.6);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

body.deep-sea-mode .mid-jellyfish {
  color: rgba(255, 100, 255, 0.8);
  text-shadow: 0 0 15px rgba(255, 100, 255, 0.6);
}

body.deep-sea-mode .mid-turtle {
  color: rgba(0, 255, 200, 0.8);
  text-shadow: 0 0 15px rgba(0, 255, 200, 0.5);
}

body.deep-sea-mode .mid-fish {
  color: rgba(100, 200, 255, 0.7);
  text-shadow: 0 0 10px rgba(100, 200, 255, 0.5);
}

body.deep-sea-mode .near-bubble {
  background: radial-gradient(circle at 30% 30%, rgba(0, 255, 255, 0.5), rgba(0, 200, 255, 0.2) 60%, transparent);
  border: 1px solid rgba(0, 255, 255, 0.4);
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

body.deep-sea-mode .near-seaweed {
  background: linear-gradient(to top, rgba(0, 255, 150, 0.5), rgba(0, 200, 255, 0.3));
}

body.deep-sea-mode .near-seaweed::before,
body.deep-sea-mode .near-seaweed::after {
  background: linear-gradient(to top, rgba(0, 255, 150, 0.4), rgba(0, 200, 255, 0.2));
}

/* 白天模式下的彩色效果 */
body:not(.deep-sea-mode) .far-fish {
  color: #ffd700;
}

body:not(.deep-sea-mode) .mid-jellyfish {
  color: #ff69b4;
}

body:not(.deep-sea-mode) .mid-turtle {
  color: #20b2aa;
}

body:not(.deep-sea-mode) .mid-fish {
  color: #ffa500;
}

body:not(.deep-sea-mode) .near-seaweed {
  display: none;
}

.ecosystem-image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg);
  color: #fff;
}

.ecosystem-image-caption h3 {
  margin: 0 0 var(--spacing-xs);
  font-size: 1.3rem;
}

.ecosystem-image-caption p {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.9;
}

body.deep-sea-mode .ecosystem-image-overlay {
  background: linear-gradient(to top, rgba(0, 20, 40, 0.9), transparent 50%);
}

/* 海洋生态系统可视化 */
.ecosystem-visualization {
  position: relative;
  margin-top: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(180deg, #87CEEB 0%, #2E8B57 40%, #006994 70%, #001a33 100%);
  padding: var(--spacing-xl);
}

body.deep-sea-mode .ecosystem-visualization {
  background: linear-gradient(180deg, #001a33 0%, #003366 30%, #001a33 60%, #000d1a 100%);
}

.ecosystem-layers {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.ecosystem-layer {
  position: relative;
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
}

body.deep-sea-mode .ecosystem-layer {
  background: rgba(0, 50, 100, 0.4);
  border: 1px solid rgba(0, 200, 255, 0.3);
}

.ecosystem-layer:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.ecosystem-layer-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
}

.ecosystem-layer-data {
  display: flex;
  gap: var(--spacing-lg);
}

.data-item {
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

body.deep-sea-mode .data-item {
  background: rgba(0, 150, 200, 0.3);
}

.data-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.data-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
}

.ecosystem-layer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.ecosystem-organism {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

body.deep-sea-mode .ecosystem-organism {
  background: rgba(0, 100, 150, 0.3);
}

.ecosystem-organism:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.2);
}

body.deep-sea-mode .ecosystem-organism:hover {
  background: rgba(0, 200, 255, 0.4);
}

.organism-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.organism-name {
  font-size: 0.85rem;
  color: #fff;
  text-align: center;
}

.ecosystem-flow {
  position: relative;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-arrow {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.6);
  font-size: 1.2rem;
  animation: flow-bounce 2s ease-in-out infinite;
}

@keyframes flow-bounce {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(10px); }
}

.ecosystem-stats {
  margin-top: var(--spacing-xl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-card {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

body.deep-sea-mode .stat-card {
  background: rgba(0, 50, 100, 0.5);
  border: 1px solid rgba(0, 200, 255, 0.3);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

/* 主题切换按钮 */
.nav-theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(0, 180, 216, 0.1);
  color: var(--color-primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid rgba(0, 180, 216, 0.3);
  margin-left: 10px;
}

.nav-theme-toggle:hover {
  background: rgba(0, 180, 216, 0.2);
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
}

body.deep-sea-mode .nav-theme-toggle {
  background: rgba(255, 215, 0, 0.15);
  color: #FFD700;
  border-color: rgba(255, 215, 0, 0.4);
}

body.deep-sea-mode .nav-theme-toggle:hover {
  background: rgba(255, 215, 0, 0.25);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

/* === 重置样式 === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: linear-gradient(180deg, #03045E 0%, #023E8A 25%, #0077B6 50%, #00B4D8 75%, #90E0EF 100%);
  background-attachment: fixed;
  background-size: cover;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* === 排版 === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-bg-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  margin-bottom: var(--spacing-sm);
}

/* === 容器 === */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* === 导航栏 === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(3, 4, 94, 0.95) 0%, rgba(3, 4, 94, 0.85) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--spacing-sm) 0;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(3, 4, 94, 0.98);
  box-shadow: var(--shadow-lg);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-light);
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-light);
  font-weight: 500;
  font-size: 1rem;
  transition: all var(--transition-fast);
  border-radius: var(--radius-md);
}

.nav-link:hover {
  color: var(--color-accent);
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
  color: var(--color-accent);
}

.nav-arrow {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-arrow {
  transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 200px;
  background: rgba(3, 4, 94, 0.98);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-xs) var(--spacing-md);
  color: var(--color-text-light);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: rgba(0, 180, 216, 0.2);
  color: var(--color-accent);
  padding-left: var(--spacing-lg);
}

.team-member {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--spacing-sm) var(--spacing-md) !important;
}

.team-member:hover {
  padding-left: var(--spacing-md) !important;
}

.member-name {
  font-weight: 600;
  color: var(--color-accent);
}

.member-role {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-xs);
  cursor: pointer;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* 互动课堂页面导航栏样式 */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-light);
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-xs);
  cursor: pointer;
  background: none;
  border: none;
}

.navbar-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* === Hero区域 === */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-slideshow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(0, 20, 60, 0.85) 0%,
    rgba(0, 40, 100, 0.75) 25%,
    rgba(0, 60, 140, 0.65) 50%,
    rgba(0, 80, 160, 0.55) 75%,
    rgba(0, 100, 180, 0.45) 100%
  );
  z-index: 2;
}

/* 点击波纹特效 */
.ripple-effect {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.ripple-effect::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease-out, height 0.6s ease-out, opacity 0.6s ease-out;
  opacity: 0;
  pointer-events: none;
}

.ripple-effect:active::after {
  width: 300px;
  height: 300px;
  opacity: 1;
  transition: 0s;
}

.ripple-effect.clicked::after {
  animation: rippleClick 0.6s ease-out forwards;
}

@keyframes rippleClick {
  0% {
    width: 0;
    height: 0;
    opacity: 0.6;
  }
  100% {
    width: 300px;
    height: 300px;
    opacity: 0;
  }
}

/* Hero内容 */
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: var(--spacing-lg);
  max-width: 900px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero-tagline {
  font-size: 0.95rem;
  color: #ffffff;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease-out;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 0, 0, 0.5);
  font-weight: 600;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900;
  font-family: 'Noto Serif SC', 'STKaiti', 'KaiTi', serif;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.15em;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-lg);
  text-shadow: 
    0 2px 4px rgba(0, 0, 0, 0.9),
    0 4px 8px rgba(0, 0, 0, 0.7),
    0 8px 20px rgba(0, 0, 0, 0.5),
    0 0 30px rgba(0, 50, 100, 0.3);
  position: relative;
  z-index: 100;
}

.title-word {
  display: inline-block;
  color: #ffffff;
  position: relative;
  animation: titleWordIn 0.8s ease-out forwards;
  opacity: 1;
}

.title-word-1 { animation-delay: 0.1s; }
.title-word-2 { animation-delay: 0.3s; color: #ffffff; }
.title-word-3 { animation-delay: 0.5s; }

.title-word-2 {
  color: #ffffff;
  animation: titleWordIn 0.8s ease-out 0.3s forwards;
}

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

@keyframes gradientText {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

.hero-highlight {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg) var(--spacing-2xl);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.15);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.highlight-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-icon {
  font-size: 1.5rem;
  animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.stat-number {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  font-family: 'Noto Serif SC', serif;
  text-shadow: 0 0 20px rgba(0, 200, 255, 0.5);
}

.stat-unit {
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 600;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.highlight-divider {
  color: rgba(255, 255, 255, 0.4);
  font-size: 1.2rem;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-2xl);
  line-height: 2;
  font-weight: 300;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3em;
}

.subtitle-word {
  display: inline-block;
  opacity: 0;
  animation: subtitleWordIn 0.6s ease-out forwards;
}

.subtitle-word-1 { animation-delay: 0.8s; }
.subtitle-word-2 { animation-delay: 0.95s; }
.subtitle-word-3 { animation-delay: 1.1s; }
.subtitle-word-4 { animation-delay: 1.25s; }
.subtitle-word-5 { animation-delay: 1.4s; }
.subtitle-word-6 { animation-delay: 1.55s; }

@keyframes subtitleWordIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 1s both;
}

.btn-icon {
  margin-right: 8px;
}

.btn-text {
  font-weight: 600;
}

.hero-scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: var(--spacing-2xl);
  animation: fadeInUp 0.8s ease-out 1.2s both;
}

.hero-scroll-hint span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.1em;
}

.scroll-arrow {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.5);
  animation: bounceArrow 2s ease-in-out infinite;
}

@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* 按钮样式 */
.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  color: var(--color-text-light);
  box-shadow: 0 4px 20px rgba(0, 180, 216, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 180, 216, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-light);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 轮播指示器 */
.slideshow-indicators {
  position: absolute;
  bottom: 180px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 10;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.indicator:hover {
  background: rgba(255, 255, 255, 0.6);
}

.indicator.active {
  background: var(--color-accent);
  border-color: var(--color-text-light);
  transform: scale(1.2);
}

/* === 区块样式 === */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-tagline {
  font-size: 0.9rem;
  color: var(--color-accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: var(--spacing-md) auto 0;
}

/* === 卡片网格 === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.card-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

.card:hover .card-image img {
  transform: scale(1.1);
}

.card-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-primary);
  color: var(--color-text-light);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-md);
}

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

.card-title {
  font-size: 1.25rem;
  margin-bottom: 4px;
  color: var(--color-bg-dark);
  font-weight: 700;
}

.card-category {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.card-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
  font-weight: 300;
}

.card-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.3) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover .card-image-overlay {
  opacity: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(0, 119, 182, 0.1);
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: #377ac1;
  color: var(--color-text-light);
  font-size: 0.85rem;
  border-radius: var(--radius-md);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-primary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.card-link:hover {
  color: var(--color-secondary);
  gap: var(--spacing-sm);
}

/* === 特色区块 === */
.features {
  background: linear-gradient(180deg, #377ac1 0%, #BBDBFC 100%);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, #377ac1, var(--color-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  position: relative;
  z-index: 2;
}

.feature-number {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 30px;
  height: 30px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: 'Noto Serif SC', serif;
}

.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.feature-desc {
  color: var(--color-text-muted);
  line-height: 1.7;
  font-weight: 300;
}

/* === 页脚 === */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-logo-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.footer-logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-desc {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-link:hover {
  color: var(--color-accent);
  padding-left: var(--spacing-xs);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

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

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

.fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

/* === 页面特定样式 === */

/* 海洋生物页面 */
.page-header {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary) 100%);
  padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
  text-align: center;
  color: var(--color-text-light);
  position: relative;
  overflow: hidden;
}

.page-title {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.page-title::after {
  background: var(--color-accent);
}

.page-breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.page-breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.page-breadcrumb a:hover {
  color: var(--color-accent);
}

/* 分类筛选 */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.filter-tab {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-text-light);
  border: 2px solid var(--color-bg-light);
  border-radius: var(--radius-lg);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-light);
}

/* 详情页 */
.detail-hero {
  position: relative;
  height: 60vh;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.detail-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.detail-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(3, 4, 94, 0.3) 0%,
    rgba(3, 4, 94, 0.8) 100%
  );
}

.detail-hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
  padding: var(--spacing-2xl);
  color: var(--color-text-light);
}

.detail-title {
  color: var(--color-text-light);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-sm);
}

.detail-meta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.detail-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

.detail-content {
  padding: var(--spacing-2xl) 0;
}

.detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
}

.detail-main h3 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-bg-light);
}

.detail-main p {
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.detail-sidebar {
  position: sticky;
  top: 100px;
}

.info-card {
  background: var(--color-text-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-lg);
}

.info-card-title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-bg-light);
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px dashed rgba(0, 119, 182, 0.2);
}

.info-label {
  color: var(--color-text-muted);
}

.info-value {
  font-weight: 500;
  color: var(--color-text);
}

/* 保护级别标签 */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
}

.status-critical {
  background: rgba(239, 68, 68, 0.1);
  color: #DC2626;
}

.status-endangered {
  background: rgba(245, 158, 11, 0.1);
  color: #D97706;
}

.status-vulnerable {
  background: rgba(245, 158, 11, 0.1);
  color: #D97706;
}

.status-near {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .detail-grid {
    grid-template-columns: 1fr;
  }
  
  .detail-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(3, 4, 94, 0.98);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-link {
    padding: var(--spacing-sm);
  }
  
  .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: transparent;
    box-shadow: none;
    padding-left: var(--spacing-md);
    display: none;
  }
  
  .nav-item.open .dropdown {
    display: block;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand {
    max-width: 100%;
  }
  
  .footer-logo {
    justify-content: center;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .navbar-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(3, 4, 94, 0.98);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .navbar-menu li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) 0;
  }
  
  .navbar-menu li:last-child {
    border-bottom: none;
  }
  
  .navbar-menu .nav-theme-toggle {
    margin-left: 0;
    margin-top: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
}

/* === 新闻动态样式 === */
.filter-bar {
  margin: var(--spacing-lg) 0;
}

.filter-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  padding: var(--spacing-md);
  background: rgba(135, 206, 235, 0.1);
  border-radius: var(--radius-lg);
}

.filter-tab {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-text-light);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text-light);
  border-color: var(--color-primary);
}

#news-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.news-item {
  background: var(--color-text-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.news-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-primary));
  color: var(--color-text-light);
  font-size: 1.1rem;
  font-weight: 600;
}

.latest-badge {
  padding: 2px 8px;
  background: var(--color-coral);
  color: var(--color-text-light);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.news-card {
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(0, 119, 182, 0.1);
}

.news-card:last-child {
  border-bottom: none;
}

.news-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: var(--spacing-sm);
}

.news-summary {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* === 科普文章样式（纯文字版） === */
.text-article-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.text-article-item {
  display: flex;
  gap: var(--spacing-lg);
  background: var(--color-text-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border-left: 4px solid transparent;
}

.text-article-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
  border-left-color: var(--color-primary);
}

.text-article-item.featured {
  background: linear-gradient(135deg, var(--color-text-light), rgba(0, 119, 182, 0.05));
  border-left-width: 6px;
}

.text-article-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.text-article-item.featured .text-article-icon {
  width: 70px;
  height: 70px;
  font-size: 2rem;
}

.text-article-content {
  flex: 1;
}

.text-article-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.text-article-category {
  padding: 4px 12px;
  color: var(--color-text-light);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.text-article-date,
.text-article-time {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.text-article-level {
  padding: 2px 8px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

.text-article-level.easy {
  background: rgba(16, 185, 129, 0.1);
  color: #10B981;
}

.text-article-level.intermediate {
  background: rgba(245, 158, 11, 0.1);
  color: #D97706;
}

.text-article-level.hard {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
}

.text-article-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: var(--spacing-sm);
}

.text-article-item.featured .text-article-title {
  font-size: 1.5rem;
}

.text-article-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.text-article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tag {
  padding: 4px 12px;
  background: linear-gradient(135deg, rgba(0, 119, 182, 0.1), rgba(0, 180, 216, 0.1));
  color: var(--color-primary);
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.tag:hover {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text-light);
}

.read-more-btn {
  align-self: flex-start;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text-light);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.read-more-btn:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.read-more-btn.small {
  padding: 8px 16px;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .text-article-item {
    flex-direction: column;
  }
  
  .text-article-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
  
  .text-article-item.featured .text-article-icon {
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
  }
}

/* === 内容切换样式 === */
.content-toggle {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.toggle-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 14px 28px;
  background: var(--color-text-light);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-xl);
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.toggle-btn:hover {
  background: rgba(0, 119, 182, 0.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.toggle-btn.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text-light);
  border-color: transparent;
}

.toggle-btn.active:hover {
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-primary));
}

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

.toggle-text {
  white-space: nowrap;
}

/* Tab内容切换 */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .content-toggle {
    flex-direction: column;
    align-items: center;
  }

  .toggle-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

/* === 海洋保护行动页面样式 === */
.action-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.action-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  background: transparent;
  border-radius: var(--radius-xl);
  padding: 0;
  box-shadow: none;
  transition: all var(--transition-normal);
}

.action-item:hover {
  transform: translateY(-4px);
}

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

.action-item-reverse {
  grid-template-columns: 1fr 1fr;
}

.action-item-reverse .action-content {
  order: 2;
}

.action-item-reverse .action-image {
  order: 1;
}

.action-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.action-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}

.action-icon {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.action-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1a365d;
  margin-bottom: var(--spacing-sm);
}

.action-desc {
  color: #4a5568;
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.action-tips {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  border: 1px solid rgba(0, 119, 182, 0.1);
}

.action-tips h4 {
  font-size: 0.9rem;
  color: #2b6cb0;
  margin-bottom: var(--spacing-sm);
}

.action-tips ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.action-tips li {
  font-size: 0.85rem;
  color: #4a5568;
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.action-tips li::before {
  content: "•";
  color: var(--color-secondary);
  position: absolute;
  left: 0;
}

/* 国际保护行动 */
.international-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.international-card {
  display: flex;
  gap: var(--spacing-lg);
  background: var(--color-text-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.international-card:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
}

.international-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  font-size: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.international-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: var(--spacing-sm);
}

.international-content p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.international-goals {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.goal-tag {
  padding: 4px 10px;
  background: linear-gradient(135deg, rgba(0, 119, 182, 0.1), rgba(0, 180, 216, 0.1));
  color: var(--color-primary);
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

/* 中国保护行动 */
.china-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.china-card {
  background: var(--color-text-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.china-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.china-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.china-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: var(--spacing-sm);
}

.china-card p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* 加入我们 */
.join-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.join-text {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.join-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.join-actions .btn-secondary {
  background: transparent;
  color: var(--color-text-light);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.join-actions .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-text-light);
}

/* 响应式 */
@media (max-width: 1024px) {
  .action-item {
    grid-template-columns: 1fr;
  }
  
  .action-item-reverse {
    grid-template-columns: 1fr;
  }
  
  .action-item-reverse .action-content,
  .action-item-reverse .action-image {
    order: initial;
  }
  
  .china-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .action-item {
    grid-template-columns: 1fr;
  }
  
  .action-item-reverse {
    grid-template-columns: 1fr;
  }
  
  .action-item-reverse .action-content,
  .action-item-reverse .action-image {
    order: initial;
  }
  
  .international-grid {
    grid-template-columns: 1fr;
  }
  
  .china-grid {
    grid-template-columns: 1fr;
  }
  
  .international-card {
    flex-direction: column;
    text-align: center;
  }
  
  .international-icon {
    margin: 0 auto;
  }
}