/* 响应式设计 */

/* 大型桌面设备 (1440px以上) */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .title-sub {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 3rem;
    }
}

/* 标准桌面设备 (1200px - 1439px) */
@media (max-width: 1439px) {
    .hero-title {
        font-size: 3.25rem;
    }
    
    .title-sub {
        font-size: 1.875rem;
    }
    
    .floating-elements {
        width: 250px;
        height: 250px;
    }
    
    .element {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* 中型设备 (992px - 1199px) */
@media (max-width: 1199px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .title-sub {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-content,
    .community-content,
    .guide-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .features-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .creators-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-social {
        text-align: center;
    }
    
    .stats-showcase {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-sm);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .creators-grid {
        grid-template-columns: 1fr;
    }
}

/* 平板设备 (768px - 991px) */
@media (max-width: 991px) {
    .section-title {
        font-size: 2.25rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .floating-elements {
        width: 200px;
        height: 200px;
    }
    
    .element {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .trending-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stats-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .community-stats .stat-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .social-links {
        justify-content: center;
    }
}

/* 移动设备 (576px - 767px) */
@media (max-width: 767px) {
    /* 内页响应式 */
    .page-title {
        font-size: 2rem;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .contact-form-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .social-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .social-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .faq-question h4 {
        font-size: 1rem;
    }
    
    .policy-item {
        padding: var(--spacing-md);
    }
    
    .policy-item h3 {
        font-size: 1.25rem;
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }
    
    .error-code {
        font-size: 6rem;
    }
    
    .error-title {
        font-size: 1.5rem;
    }
    
    .error-actions {
        flex-direction: column;
        align-items: center;
    }
    :root {
        --spacing-xs: 0.375rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    .navbar .container {
        flex-wrap: wrap;
        position: relative;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        order: 3;
        margin-top: var(--spacing-md);
        flex-direction: column;
        background: var(--bg-primary);
        border-radius: var(--radius);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        z-index: 1000;
    }
    
    .nav-links.show {
        display: flex;
    }
    
    .nav-links li {
        margin: 0;
    }
    
    .nav-links a {
        padding: var(--spacing-sm) 0;
        display: block;
        text-align: center;
        border-bottom: 1px solid var(--neutral-200);
    }
    
    .nav-links li:last-child a {
        border-bottom: none;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .title-sub {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 0.875rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-stats .stat-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-sm);
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--radius);
        backdrop-filter: blur(10px);
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .floating-elements {
        display: none;
    }
    
    .section-title {
        font-size: 1.875rem;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .section-title i {
        font-size: 1.5rem;
    }
    
    .trending-tabs {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }
    
    .trending-tab {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }
    
    .trending-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .trending-card {
        margin-bottom: var(--spacing-sm);
    }
    
    .about-text .section-header {
        text-align: center;
        margin-bottom: var(--spacing-md);
    }
    
    .about-text .section-title {
        justify-content: center;
    }
    
    .about-text .section-subtitle {
        text-align: center;
    }
    
    .about-features {
        gap: var(--spacing-sm);
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .about-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .stats-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-sm);
    }
    
    .features-main .feature-card {
        padding: var(--spacing-md);
    }
    
    .feature-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
        text-align: center;
    }
    
    .feature-stats {
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .creators-showcase {
        gap: var(--spacing-md);
    }
    
    .creator-featured .creator-card {
        padding: var(--spacing-md);
    }
    
    .creator-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .creator-stats .stat {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-xs);
        background: var(--bg-secondary);
        border-radius: var(--radius);
    }
    
    .creator-actions {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .creators-grid .creator-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .creators-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .community-features {
        gap: var(--spacing-md);
    }
    
    .community-feature {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .community-showcase {
        padding: var(--spacing-md);
    }
    
    .community-stats {
        gap: var(--spacing-sm);
    }
    
    .join-buttons .btn {
        width: 100%;
    }
    
    .guide-steps {
        gap: var(--spacing-md);
    }
    
    .guide-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1rem;
    }
    
    .step-content {
        padding: var(--spacing-sm);
    }
    
    .step-features {
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .guide-visual {
        position: static;
        margin-top: var(--spacing-md);
    }
    
    .guide-tips li {
        font-size: 0.75rem;
    }
    
    .footer-main {
        padding: var(--spacing-xl) 0 var(--spacing-md);
    }
    
    .footer-brand {
        text-align: center;
        margin-bottom: var(--spacing-md);
    }
    
    .footer-social .social-links {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .footer-navigation {
        text-align: center;
    }
    
    .footer-nav-section h3 {
        justify-content: center;
    }
    
    .footer-stats-section {
        text-align: center;
    }
    
    .footer-stats-section h3 {
        justify-content: center;
    }
    
    .footer-bottom {
        padding: var(--spacing-md) 0;
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 44px;
        height: 44px;
    }
}

/* 小型移动设备 (480px以下) */
@media (max-width: 479px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .title-sub {
        font-size: 1.125rem;
    }
    
    .hero-description {
        font-size: 0.8125rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.875rem;
    }
    
    .trending-tabs {
        gap: var(--spacing-xs);
    }
    
    .trending-tab {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }
    
    .trending-card {
        border-radius: var(--radius);
    }
    
    .trending-info {
        padding: var(--spacing-sm);
    }
    
    .trending-info h3 {
        font-size: 1.125rem;
    }
    
    .features-main .feature-card {
        padding: var(--spacing-sm);
    }
    
    .features-main h3 {
        font-size: 1.25rem;
    }
    
    .creator-featured .creator-card {
        padding: var(--spacing-sm);
    }
    
    .creator-avatar {
        width: 100px;
        height: 100px;
    }
    
    .creators-grid .creator-avatar {
        width: 60px;
        height: 60px;
    }
    
    .community-showcase {
        padding: var(--spacing-sm);
    }
    
    .guide-tips h4 {
        font-size: 1rem;
    }
    
    .guide-tips li {
        font-size: 0.6875rem;
    }
    
    .footer-description {
        font-size: 0.875rem;
    }
    
    .footer-links-col h3 {
        font-size: 0.875rem;
    }
    
    .footer-links-col a {
        font-size: 0.75rem;
    }
    
    .copyright {
        font-size: 0.75rem;
    }
    
    .disclaimer {
        font-size: 0.6875rem;
    }
}

/* 超小型设备 (360px以下) */
@media (max-width: 359px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .title-sub {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.375rem;
    }
    
    .btn {
        padding: 0.625rem 1rem;
        font-size: 0.75rem;
    }
    
    .btn-large {
        padding: 0.75rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .trending-tab {
        padding: 0.375rem 0.75rem;
        font-size: 0.6875rem;
    }
    
    .creator-avatar {
        width: 80px;
        height: 80px;
    }
    
    .creators-grid .creator-avatar {
        width: 50px;
        height: 50px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 0.875rem;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
    }
}

/* 横屏模式优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: 100vh;
        padding: var(--spacing-md) 0;
    }
    
    .hero .container {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .hero-buttons {
        flex-direction: row;
        gap: var(--spacing-sm);
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-background {
        background-image: url('../images/background/hero-bg@2x.jpg');
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-background {
        animation: none;
    }
    
    .floating-elements .element {
        animation: none;
    }
    
    .gold-divider::before {
        animation: none;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        --neutral-200: #334155;
        --neutral-300: #475569;
    }
    
    .navbar {
        background-color: rgba(15, 23, 42, 0.95);
        border-bottom-color: var(--neutral-300);
    }
    
    .trending-tab,
    .stat-card,
    .feature-card,
    .creator-card,
    .step-content,
    .guide-visual,
    .community-showcase {
        background: var(--bg-secondary);
        border-color: var(--neutral-300);
    }
    
    .nav-links {
        background: var(--bg-secondary);
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .mobile-menu,
    .hero-visual,
    .floating-elements,
    .back-to-top,
    .trending-tabs,
    .creator-actions,
    .join-buttons,
    .guide-cta,
    .footer-social {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: 1rem 0;
        background: none !important;
        color: #000 !important;
    }
    
    .hero::before {
        display: none;
    }
    
    .section-title,
    .hero-title,
    .title-main,
    .title-sub {
        color: #000 !important;
    }
    
    .hero-description {
        color: #333 !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: #000;
        background: #fff;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .section-divider,
    .gold-divider {
        height: 1px;
        background: #ccc;
        margin: 1rem 0;
    }
    
    .btn {
        border: 1px solid #000;
        color: #000 !important;
        background: none !important;
    }
}

/* 可访问性增强 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000ff;
        --secondary-color: #ff8c00;
        --text-primary: #000000;
        --text-secondary: #333333;
        --bg-primary: #ffffff;
        --bg-secondary: #f5f5f5;
    }
    
    .btn-primary {
        background-color: #0000ff;
        border: 2px solid #000000;
    }
    
    .btn-secondary {
        background-color: #ff8c00;
        border: 2px solid #000000;
    }
    
    .btn-outline {
        border: 2px solid #000000;
        color: #000000;
    }
}

/* 大字体偏好 */
@media (prefers-font-size: large) {
    body {
        font-size: 1.125rem;
    }
    
    .btn {
        font-size: 1rem;
        padding: 1rem 1.5rem;
    }
    
    .section-title {
        font-size: 3rem;
    }
    
    .hero-title {
        font-size: 4rem;
    }
}