/* ========================================
   AI資訊站 - Modern CSS Styles
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Light Theme */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #f59e0b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #334155 100%);

    /* Typography */
    --font-primary: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-tooltip: 400;
}

/* Dark Theme */
[data-theme="dark"] {
    --background: #0f172a;
    --background-alt: #1e293b;
    --surface: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.4);
}

/* ========================================
   Base Styles
   ======================================== */

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Header
   ======================================== */

.header {
    position: sticky;
    top: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .header {
    background: rgba(30, 41, 59, 0.95);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

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

.logo-icon {
    font-size: 1.5rem;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

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

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

.search-btn,
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.search-btn:hover,
.theme-toggle:hover {
    background: var(--surface-hover);
    color: var(--primary);
}

.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* Search Modal */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    padding: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: var(--z-modal);
    box-shadow: 0 4px 20px var(--shadow);
}

.search-modal.active {
    transform: translateY(0);
    opacity: 1;
}

.search-modal-content {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-md);
}

.search-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    background: var(--background);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--primary);
}

.search-close {
    color: var(--text-secondary);
    padding: var(--spacing-sm);
}

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

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: var(--spacing-3xl) 0;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* AI Animation */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-animation {
    width: 300px;
    height: 300px;
    position: relative;
}

.neural-network {
    width: 100%;
    height: 100%;
    position: relative;
    animation: rotate 20s linear infinite;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.node-1 { top: 50%; left: 50%; transform: translate(-50%, -50%); width: 30px; height: 30px; }
.node-2 { top: 10%; left: 50%; transform: translateX(-50%); animation-delay: 0.2s; }
.node-3 { top: 50%; right: 10%; animation-delay: 0.4s; }
.node-4 { bottom: 10%; left: 50%; transform: translateX(-50%); animation-delay: 0.6s; }
.node-5 { top: 50%; left: 10%; animation-delay: 0.8s; }

.connection {
    position: absolute;
    background: rgba(255, 255, 255, 0.3);
    height: 2px;
    transform-origin: left center;
}

.connection-1 { top: 50%; left: 50%; width: 40%; transform: rotate(-90deg) translateX(50%); }
.connection-2 { top: 50%; left: 50%; width: 40%; transform: rotate(0deg); }
.connection-3 { top: 50%; left: 50%; width: 40%; transform: rotate(90deg) translateX(-50%); }
.connection-4 { top: 50%; left: 50%; width: 40%; transform: rotate(180deg); }

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.node-2, .node-3, .node-4, .node-5 {
    animation-name: pulse-small;
}

@keyframes pulse-small {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

/* ========================================
   News Ticker
   ======================================== */

.news-ticker {
    background: var(--gradient-dark);
    color: white;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.ticker-label {
    background: var(--accent);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

.ticker-content {
    flex: 1;
    overflow: hidden;
    padding: var(--spacing-md);
}

.ticker-track {
    display: flex;
    gap: var(--spacing-3xl);
    animation: ticker 30s linear infinite;
    white-space: nowrap;
}

.ticker-item {
    flex-shrink: 0;
}

@keyframes ticker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========================================
   Main Content
   ======================================== */

.main-content {
    padding: var(--spacing-3xl) 0;
}

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

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* Filter Section */
.filter-section {
    margin-bottom: var(--spacing-2xl);
}

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

.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--surface-hover);
    transition: all var(--transition-fast);
}

.filter-tab:hover {
    background: var(--primary-light);
    color: white;
}

.filter-tab.active {
    background: var(--primary);
    color: white;
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.news-card {
    display: block;
    background: var(--surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow);
    transition: all var(--transition-normal);
    border: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-lg);
}

.news-card.featured {
    grid-column: span 2;
    grid-row: span 2;
}

.news-card.featured .card-image {
    height: 300px;
}

.news-card.featured .card-title {
    font-size: var(--font-size-2xl);
}

.card-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: 4rem;
    opacity: 0.8;
}

.gradient-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gradient-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gradient-4 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.gradient-5 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.gradient-6 { background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%); }

.card-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--accent);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.card-badge.latest-badge {
    background: linear-gradient(135deg, #ff6b6b, #ff8e53);
    animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

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

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.category {
    color: var(--primary);
    font-weight: 600;
}

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

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card:hover .card-title {
    color: var(--primary);
}

.card-excerpt {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.read-time {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.bookmark-btn {
    color: var(--text-muted);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.bookmark-btn:hover {
    color: var(--accent);
    background: var(--surface-hover);
}

.bookmark-btn.active {
    color: var(--accent);
}

.bookmark-btn.active svg {
    fill: var(--accent);
}

/* Load More */
.load-more-wrapper {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-2xl);
    background: var(--surface);
    border: 2px solid var(--primary);
    border-radius: var(--radius-full);
    color: var(--primary);
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

/* ========================================
   GenAI Section
   ======================================== */

.genai-section {
    background: var(--background-alt);
    padding: var(--spacing-3xl) 0;
    margin-top: var(--spacing-3xl);
}

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

.genai-card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 0 4px 20px var(--shadow);
    transition: all var(--transition-normal);
    border: 1px solid var(--border);
}

.genai-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px var(--shadow-lg);
}

.genai-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.genai-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.genai-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.genai-list {
    border-top: 1px solid var(--border);
    padding-top: var(--spacing-md);
}

.genai-list li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.genai-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* ========================================
   Trends Section
   ======================================== */

.trends-section {
    padding: var(--spacing-3xl) 0;
}

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

.trend-card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.trend-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 30px var(--shadow);
}

.trend-card.large {
    grid-row: span 2;
    background: var(--gradient-primary);
    color: white;
    border: none;
}

.trend-card.large .trend-badge {
    background: rgba(255, 255, 255, 0.2);
}

.trend-card.large h3 {
    font-size: var(--font-size-2xl);
}

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

.trend-badge {
    background: var(--primary-light);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.trend-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.trend-card.large .trend-date {
    color: rgba(255, 255, 255, 0.8);
}

.trend-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.trend-card.large h3 {
    color: white;
}

.trend-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.trend-card.large p {
    color: rgba(255, 255, 255, 0.9);
}

.trend-tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

/* ========================================
   Industry Section
   ======================================== */

.industry-section {
    background: var(--background-alt);
    padding: var(--spacing-3xl) 0;
}

.industry-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    justify-content: center;
}

.industry-tab {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--surface);
    border: 2px solid var(--border);
    transition: all var(--transition-fast);
}

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

.industry-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.industry-panel {
    display: none;
    gap: var(--spacing-2xl);
    animation: fadeIn 0.3s ease;
}

.industry-panel.active {
    display: grid;
    grid-template-columns: 2fr 1fr;
}

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

.industry-info {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: 0 4px 20px var(--shadow);
}

.industry-info h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.industry-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.industry-features {
    border-top: 1px solid var(--border);
    padding-top: var(--spacing-xl);
}

.industry-features li {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border);
}

.industry-features li:last-child {
    border-bottom: none;
}

.industry-features strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.industry-features span {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.industry-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
}

.stat-value {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.stat-desc {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* ========================================
   Research Section
   ======================================== */

.research-section {
    padding: var(--spacing-3xl) 0;
}

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

.research-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    padding-bottom: var(--spacing-2xl);
}

.timeline-dot {
    position: absolute;
    left: 12px;
    top: 5px;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    border: 4px solid var(--background);
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-content {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 0 4px 20px var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    border-color: var(--primary);
    transform: translateX(5px);
}

.timeline-date {
    color: var(--primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.timeline-content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Newsletter Section
   ======================================== */

.newsletter-section {
    background: var(--gradient-secondary);
    padding: var(--spacing-3xl) 0;
}

.newsletter-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.newsletter-info h2 {
    font-size: var(--font-size-2xl);
    color: white;
    margin-bottom: var(--spacing-sm);
}

.newsletter-info p {
    color: rgba(255, 255, 255, 0.9);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-md);
}

.newsletter-form input {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-base);
    width: 300px;
    outline: none;
}

.newsletter-form button {
    padding: var(--spacing-md) var(--spacing-2xl);
    background: white;
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.newsletter-form button:hover {
    background: var(--text-primary);
    color: white;
}

/* ========================================
   SEO Section
   ======================================== */

.seo-section {
    background: var(--background-alt);
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--border);
}

.seo-content {
    max-width: 900px;
    margin: 0 auto;
}

.seo-content h2 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.seo-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    text-align: justify;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--gradient-dark);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-brand .logo {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: white;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
}

.footer-links h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

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

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

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Back to Top Button
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: var(--z-dropdown);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-card.featured {
        grid-column: span 2;
        grid-row: span 1;
    }

    .genai-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .industry-panel.active {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 20px var(--shadow);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

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

    .hero-visual {
        display: none;
    }

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

    .news-card.featured {
        grid-column: span 1;
    }

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

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

    .trend-card.large {
        grid-row: span 1;
    }

    .filter-section .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .newsletter-content {
        flex-direction: column;
        text-align: center;
    }

    .newsletter-form {
        flex-direction: column;
        width: 100%;
    }

    .newsletter-form input {
        width: 100%;
    }

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

    .social-links {
        justify-content: center;
    }

    .industry-stats {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .stat-card {
        flex: 1;
        min-width: 150px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

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

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .filter-tabs {
        justify-content: center;
    }

    .filter-tab {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Print Styles */
@media print {
    .header,
    .news-ticker,
    .newsletter-section,
    .back-to-top,
    .search-modal {
        display: none !important;
    }

    .news-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}