/* game-environment.pro - Main Styles */

/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: #6b7280;
}

a {
    color: #8B5CF6;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #7C3AED;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

.mb-4 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 2rem;
}

/* Navigation Styles */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #8B5CF6 !important;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-links li a {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links li a:hover {
    color: #8B5CF6;
    background: rgba(139, 92, 246, 0.1);
}

.nav-links li a:before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #8B5CF6;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links li a:hover:before {
    width: 100%;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: fadeInUp 1s ease-out;
}

.hero-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    line-height: 1.6;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: #8B5CF6;
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
    background: #7C3AED;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Demo Container */
.demo-container {
    position: relative;
    animation: fadeInRight 1s ease-out 0.6s both;
}

.demo-iframe {
    width: 100%;
    height: 450px;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity 1s ease;
}

.demo-iframe.loaded {
    opacity: 1;
}

/* Skeleton Styles */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.iframe-skeleton {
    width: 100%;
    height: 450px;
    border-radius: 1rem;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    transition: opacity 0.5s ease;
}

.iframe-skeleton.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    z-index: 2;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e5e7eb;
    border-top: 4px solid #8B5CF6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    margin-left: 1rem;
    color: #6b7280;
    font-weight: 500;
}

/* Error State */
.error-state {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(248, 113, 113, 0.1);
    border: 2px dashed #ef4444;
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3;
    transition: opacity 0.3s ease;
}

.error-state.hidden {
    opacity: 0;
    pointer-events: none;
}

.error-icon {
    font-size: 3rem;
    color: #ef4444;
    margin-bottom: 1rem;
}

.error-message {
    color: #dc2626;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: center;
}

.error-description {
    color: #7f1d1d;
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 1rem;
}

.retry-btn {
    background: #ef4444;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.retry-btn:hover {
    background: #dc2626;
}

/* Toast Notification System */
.toast-container {
    position: fixed;
    top: 6rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: white;
    border-radius: 0.75rem;
    padding: 1rem 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-left: 4px solid #8B5CF6;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    transform: translateX(100%);
    animation: slideInRight 0.3s ease-out forwards;
}

.toast.success {
    border-left-color: #10b981;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast.warning {
    border-left-color: #f59e0b;
}

.toast-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    color: #10b981;
}

.toast.error .toast-icon {
    color: #ef4444;
}

.toast.warning .toast-icon {
    color: #f59e0b;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.toast-message {
    color: #6b7280;
    font-size: 0.9rem;
}

.toast-close {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: color 0.3s ease;
}

.toast-close:hover {
    color: #6b7280;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    background: #f9fafb;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #6b7280;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.fade-in {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.6s ease-out forwards;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #8B5CF6, #EC4899);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, #8B5CF6, #EC4899);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Progress Indicator */
.progress-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #8B5CF6, #EC4899);
    z-index: 9999;
    transition: width 0.1s ease;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: #8B5CF6;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.back-to-top:hover {
    background: #7C3AED;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.6);
}

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

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

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

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0,0,0);
    }
    40%, 43% {
        transform: translate3d(0,-15px,0);
    }
    70% {
        transform: translate3d(0,-7px,0);
    }
    90% {
        transform: translate3d(0,-2px,0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .demo-iframe {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .iframe-skeleton {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 5rem 1rem 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .demo-iframe {
        height: 350px;
    }
    
    .iframe-skeleton {
        height: 350px;
    }
    
    .features {
        padding: 4rem 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .toast-container {
        right: 1rem;
        left: 1rem;
    }
    
    .toast {
        min-width: auto;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .demo-iframe {
        height: 280px;
    }
    
    .iframe-skeleton {
        height: 280px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

/* Loading State */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #8B5CF6;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #7C3AED;
}

/* Selection Styles */
::selection {
    background: rgba(139, 92, 246, 0.3);
    color: #1f2937;
}

/* Focus Styles */
:focus {
    outline: 2px solid #8B5CF6;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .navbar,
    .demo-iframe,
    .back-to-top,
    .toast-container {
        display: none;
    }
    
    .hero {
        background: white;
        color: black;
        min-height: auto;
        padding: 2rem 0;
    }
    
    .hero-content h1,
    .hero-content p {
        color: black;
    }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    .hero {
        background: #000;
    }
    
    .feature-card {
        border: 2px solid #333;
    }
}

/* Reduced Animation Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 性能优化样式 - Performance Optimization Styles */

/* 懒加载图片样式 */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.lazy-loaded {
    opacity: 1;
}

/* 数据节省模式样式 */
.data-saving-mode {
    --animation-duration: 0s;
}

.data-saving-mode * {
    animation-duration: var(--animation-duration) !important;
    transition-duration: 0.1s !important;
}

/* 性能指示器样式 */
.performance-indicator {
    position: fixed;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12px;
    z-index: 10000;
    display: none;
    backdrop-filter: blur(10px);
}

.performance-indicator.show {
    display: block;
}

.performance-indicator.good {
    background: rgba(34, 197, 94, 0.9);
}

.performance-indicator.needs-improvement {
    background: rgba(251, 191, 36, 0.9);
}

.performance-indicator.poor {
    background: rgba(239, 68, 68, 0.9);
}

/* 连接状态指示器 */
.connection-indicator {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12px;
    z-index: 10000;
    display: none;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.connection-indicator.show {
    display: block;
}

.connection-indicator.offline {
    background: rgba(239, 68, 68, 0.9);
}

.connection-indicator.slow {
    background: rgba(251, 191, 36, 0.9);
}

.connection-indicator.fast {
    background: rgba(34, 197, 94, 0.9);
}

/* 图片占位符样式 */
.img-placeholder {
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    font-size: 14px;
    min-height: 200px;
    border-radius: 8px;
}

/* 优化的动画性能 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* GPU加速的动画 */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000;
}

/* 响应式图片优化 */
.responsive-img {
    width: 100%;
    height: auto;
    object-fit: cover;
    loading: lazy;
}

/* 关键资源优先级 */
.critical-resource {
    loading: eager;
    fetchpriority: high;
}

.non-critical-resource {
    loading: lazy;
    fetchpriority: low;
}

/* 内存优化 - 限制复杂选择器 */
.optimize-memory * {
    contain: layout style paint;
}

/* 渲染优化 */
.optimize-rendering {
    contain: strict;
    content-visibility: auto;
}

/* ========================================
   Day 9 Phase 2: Gallery & Interactive Features
   ======================================== */

/* 3D模型画廊样式 */
.gallery-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0 60px;
    text-align: center;
}

.gallery-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.gallery-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.gallery-search {
    max-width: 500px;
    margin: 0 auto;
}

.search-input-container {
    position: relative;
}

.search-input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    background: white;
}

.search-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
    font-size: 18px;
}

/* 画廊筛选器 */
.gallery-filters {
    background: white;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 80px;
    z-index: 100;
}

.filter-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid #e0e0e0;
    background: white;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-btn:hover {
    border-color: #667eea;
    color: #667eea;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.sort-select {
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 20px;
    background: white;
    cursor: pointer;
    font-weight: 500;
}

/* 画廊统计 */
.gallery-stats {
    margin: 40px 0;
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    text-align: center;
}

.stat-item {
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-label {
    color: #666;
    font-weight: 500;
}

/* 模型网格 */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.model-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.model-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.model-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.model-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.model-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

.action-btn {
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: 500;
}

.action-btn:hover {
    background: white;
    transform: scale(1.05);
}

.like-btn.liked {
    background: #e74c3c;
    color: white;
}

.model-info {
    padding: 20px;
}

.model-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.model-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.model-parts {
    margin-bottom: 15px;
    font-size: 14px;
}

.parts-label {
    font-weight: 600;
    color: #333;
}

.parts-count {
    color: #667eea;
    font-weight: 500;
}

.model-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    padding: 4px 12px;
    background: #f8f9fa;
    border-radius: 15px;
    font-size: 12px;
    color: #666;
    font-weight: 500;
}

.model-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #999;
}

.category-badge {
    padding: 4px 10px;
    background: #667eea;
    color: white;
    border-radius: 10px;
    font-weight: 500;
}

/* 加载指示器 */
.loading-indicator {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.no-results {
    text-align: center;
    padding: 80px 20px;
    color: #666;
}

.no-results-icon {
    font-size: 4rem;
    color: #ddd;
    margin-bottom: 20px;
}

.load-more-indicator {
    text-align: center;
    padding: 40px;
    color: #666;
    font-style: italic;
}

/* 画廊特性展示 */
.gallery-features {
    background: #f8f9fa;
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: white;
}

/* API状态监控样式 */
.api-status-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    border-radius: 25px;
    padding: 15px 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1000;
    min-width: 200px;
}

.api-status-indicator:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.api-status-indicator.online .status-icon i {
    color: #27ae60;
}

.api-status-indicator.offline .status-icon i {
    color: #e74c3c;
}

.api-status-indicator.timeout .status-icon i {
    color: #f39c12;
}

.api-status-indicator.unknown .status-icon i {
    color: #95a5a6;
}

.status-icon {
    display: inline-block;
    margin-right: 10px;
    font-size: 12px;
}

.status-info {
    display: inline-block;
    vertical-align: top;
}

.status-text {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.response-time {
    font-size: 12px;
    color: #666;
}

.status-details {
    margin-top: 5px;
    font-size: 11px;
    color: #999;
}

/* 用户反馈系统样式 */
.feedback-button {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 15px 20px;
    border-radius: 25px;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feedback-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.feedback-icon {
    font-size: 18px;
}

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

/* 反馈模态框 */
.feedback-modal .modal-content {
    max-width: 600px;
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-section label {
    font-weight: 600;
    color: #333;
}

.form-section input,
.form-section select,
.form-section textarea {
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-section input:focus,
.form-section select:focus,
.form-section textarea:focus {
    outline: none;
    border-color: #667eea;
}

.rating-container {
    display: flex;
    gap: 5px;
    margin: 10px 0;
}

.rating-star {
    font-size: 2rem;
    color: #ddd;
    cursor: pointer;
    transition: color 0.2s ease;
}

.rating-star:hover,
.rating-star.active {
    color: #f39c12;
}

.character-count {
    text-align: right;
    font-size: 12px;
    color: #666;
    margin-top: 5px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input:checked + .checkmark {
    background: #667eea;
    border-color: #667eea;
}

.checkbox-label input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* 响应式设计增强 */
@media (max-width: 768px) {
    .gallery-title {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .models-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-buttons {
        justify-content: center;
    }
    
    .api-status-indicator,
    .feedback-button {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        margin: 20px auto;
        display: block;
        width: fit-content;
    }
}