/**
 * 响应式样式
 * TSF研究所 - ACG文化兴趣部落
 */

/* ==========================================
   Tablet (max-width: 992px)
   ========================================== */

@media (max-width: 992px) {
    :root {
        --spacing-section-desktop: 80px;
        --container-width: 90%;
    }
    
    /* Features Grid */
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* About Page */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        order: -1;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .directions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    /* Content Page */
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Timeline */
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 30px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(even) {
        margin-left: 0;
    }
    
    .timeline-item .timeline-dot {
        left: -7px;
        right: auto;
    }
    
    /* Stats Grid */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-decoration {
        display: none;
    }
    
    /* Footer Grid */
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .footer-info {
        grid-column: span 2;
    }
    
    /* Update Card */
    .update-card {
        grid-template-columns: 1fr;
    }
    
    .update-visual {
        display: none;
    }
    
    /* Hero */
    .hero-title {
        font-size: clamp(2rem, 5vw, 3rem);
    }
    
    .hero-description br {
        display: none;
    }
    
    /* CTA */
    .cta-card {
        padding: 50px 30px;
    }
}

/* ==========================================
   Mobile (max-width: 768px)
   ========================================== */

@media (max-width: 768px) {
    :root {
        --spacing-container-desktop: 20px;
        --spacing-section-desktop: 60px;
        --spacing-card-padding: 20px;
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 100px 30px 30px;
        background: var(--color-bg-card);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-smooth);
        z-index: calc(var(--z-navbar) - 1);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: 16px 0;
        font-size: var(--font-size-base);
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero */
    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-badge {
        font-size: var(--font-size-xs);
    }
    
    .hero-scroll-hint {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        color: var(--color-text-tertiary);
        font-size: var(--font-size-xs);
        margin-top: 60px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        margin-bottom: var(--spacing-component);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    /* About Page */
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .directions-grid {
        grid-template-columns: 1fr;
    }
    
    /* Content Page */
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-section {
        position: relative;
        top: 0;
    }
    
    .filter-bar {
        gap: var(--spacing-small);
    }
    
    /* Updates */
    .updates-list {
        gap: var(--spacing-element);
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-element);
    }
    
    .stat-item {
        padding: var(--spacing-element);
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    /* CTA */
    .cta-card {
        padding: 40px 24px;
    }
    
    .cta-card h2 {
        font-size: var(--font-size-xl);
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    /* Footer */
    .footer {
        padding: 50px 0 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-info {
        grid-column: auto;
    }
    
    /* Back to Top */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* ==========================================
   Small Mobile (max-width: 480px)
   ========================================== */

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
    }
    
    /* Hero */
    .hero-title {
        font-size: 1.875rem;
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    /* Feature Card */
    .feature-card {
        padding: var(--spacing-element);
    }
    
    .feature-number {
        display: none;
    }
    
    /* Update Card */
    .update-card {
        padding: var(--spacing-element);
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 20px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: var(--radius-md);
    }
    
    .stat-number {
        font-size: var(--font-size-xl);
    }
    
    /* Buttons */
    .btn {
        padding: 12px 20px;
        font-size: var(--font-size-sm);
    }
    
    .btn-large {
        padding: 14px 24px;
    }
    
    /* Tags */
    .tag {
        padding: 3px 10px;
        font-size: 10px;
    }
}

/* ==========================================
   Landscape Mode Adjustments
   ========================================== */

@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }
    
    .hero-scroll-hint {
        display: none;
    }
}

/* ==========================================
   High DPI Screens
   ========================================== */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .bg-decorations {
        pointer-events: none;
    }
}

/* ==========================================
   Reduced Motion
   ========================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
    
    .blob,
    .shape {
        animation: none;
    }
}

/* ==========================================
   Dark Mode Support (Optional)
   ========================================== */

@media (prefers-color-scheme: dark) {
    /* 可以在这里添加深色模式样式 */
}

/* ==========================================
   Print Styles
   ========================================== */

@media print {
    .navbar,
    .back-to-top,
    .bg-decorations,
    .hero-shapes,
    .hero-scroll-hint {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero,
    .features,
    .updates,
    .stats,
    .cta {
        background: white;
        padding: 20px 0;
    }
}