/* =============================================================================
   GrayTV - 布局优化样式
   ============================================================================= */

/* =============================================================================
   LOGO 样式 - 优化升级版
   ============================================================================= */

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    color: var(--text-primary);
    text-decoration: none;
    margin-right: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.nav-brand:hover {
    transform: translateY(-1px);
}

.nav-brand:hover .nav-brand-logo {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 12px rgba(167, 139, 250, 0.4));
}

.nav-brand-logo {
    position: relative;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    filter: drop-shadow(0 2px 8px rgba(124, 58, 237, 0.3));
}

.nav-brand-logo svg {
    width: 100%;
    height: 100%;
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
    gap: 2px;
}

.nav-brand-text .brand-name {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, 
        #e0d5ff 0%, 
        #c4b5fd 25%, 
        #a78bfa 50%, 
        #8b5cf6 75%, 
        #7c3aed 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.nav-brand:hover .brand-name {
    animation-duration: 2s;
}

.nav-brand-text .brand-tagline {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.nav-brand:hover .brand-tagline {
    opacity: 1;
    color: var(--text-secondary);
}

/* 移动端 LOGO 简化 */
@media (max-width: 768px) {
    .nav-brand {
        margin-right: auto;
        gap: 10px;
    }
    
    .nav-brand-text .brand-tagline {
        display: none;
    }
    
    .nav-brand-logo {
        width: 34px;
        height: 34px;
    }
    
    .nav-brand-text .brand-name {
        font-size: 1.25rem;
    }
    
    .nav-brand:hover {
        transform: none;
    }
}

/* =============================================================================
   顶部导航优化 - 增强版
   ============================================================================= */

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-xl);
    transition: all var(--transition-normal);
}

/* 滚动时导航栏变化 */
.top-nav.scrolled {
    background: rgba(9, 9, 11, 0.95);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(124, 58, 237, 0.05);
    border-bottom-color: rgba(124, 58, 237, 0.1);
}

.nav-links {
    display: flex;
    gap: 2px;
    margin-left: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    text-decoration: none;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.1), rgba(124, 58, 237, 0.05));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
    border-radius: 1px;
    transition: width var(--transition-fast);
    box-shadow: 0 0 8px rgba(167, 139, 250, 0.5);
}

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

.nav-link:hover::before {
    opacity: 1;
}

.nav-link:hover .icon {
    transform: scale(1.1);
}

.nav-link .icon {
    transition: transform var(--transition-fast);
}

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

.nav-link.active::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(124, 58, 237, 0.08));
}

.nav-link.active::after {
    width: 24px;
}

/* 搜索框优化 */
.nav-search {
    flex: 1;
    max-width: 360px;
    margin: 0 var(--spacing-xl);
    position: relative;
}

.nav-search input {
    width: 100%;
    height: 40px;
    padding: 0 16px 0 44px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.nav-search input:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
}

.nav-search input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.nav-search input::placeholder {
    color: var(--text-muted);
}

.nav-search .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.nav-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 桌面端隐藏类 */
@media (max-width: 1024px) {
    .nav-search {
        max-width: 280px;
        margin: 0 var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .top-nav {
        height: 56px;
        padding: 0 var(--spacing-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-search {
        display: none;
    }
    
    .nav-actions .hide-mobile {
        display: none;
    }
}

/* =============================================================================
   底部导航优化（移动端）
   ============================================================================= */

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: linear-gradient(to top, rgba(9, 9, 11, 0.98) 0%, rgba(9, 9, 11, 0.95) 100%);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: none;
    z-index: 100;
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav-inner {
    display: flex;
    height: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    position: relative;
    text-decoration: none;
}

.bottom-nav-item .icon {
    width: 22px;
    height: 22px;
    transition: transform var(--transition-fast);
}

.bottom-nav-item span:last-child {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.bottom-nav-item:active .icon {
    transform: scale(0.9);
}

.bottom-nav-item.active {
    color: var(--primary-light);
}

.bottom-nav-item.active .icon {
    transform: scale(1.1);
}

/* 直播图标特殊样式 - 红点指示 */
.bottom-nav-item[href="/live/"]::before {
    content: '';
    position: absolute;
    top: 10px;
    right: calc(50% - 16px);
    width: 6px;
    height: 6px;
    background: #ef4444;
    border-radius: 50%;
    animation: pulse-live 2s ease-in-out infinite;
}

@keyframes pulse-live {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

@media (max-width: 768px) {
    .bottom-nav {
        display: block;
    }
}

/* =============================================================================
   主内容区域优化
   ============================================================================= */

.main-content {
    flex: 1;
    padding-top: 64px;
    padding-bottom: 20px;
}

@media (max-width: 768px) {
    .main-content {
        padding-top: 56px;
        padding-bottom: 92px;
    }
}

/* =============================================================================
   Hero 区域优化
   ============================================================================= */

.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.2), transparent),
        radial-gradient(ellipse 60% 40% at 90% 100%, rgba(139, 92, 246, 0.12), transparent),
        radial-gradient(ellipse 40% 30% at 10% 80%, rgba(167, 139, 250, 0.08), transparent);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero-title span {
    background: linear-gradient(135deg, #a78bfa 0%, #7c3aed 50%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        padding: 0 var(--spacing-md);
    }
}

/* =============================================================================
   功能卡片网格优化
   ============================================================================= */

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

@media (max-width: 1200px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

.feature-card {
    position: relative;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(39, 39, 42, 0.6) 0%, rgba(24, 24, 27, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover {
    border-color: rgba(124, 58, 237, 0.3);
    transform: translateY(-6px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 60px rgba(124, 58, 237, 0.1);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 58, 237, 0.12);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    color: var(--primary-light);
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    background: rgba(124, 58, 237, 0.2);
}

.feature-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

.feature-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.feature-stat {
    text-align: left;
}

.feature-stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-light);
}

.feature-stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =============================================================================
   短视频页面布局优化
   ============================================================================= */

.shorts-container {
    position: fixed;
    inset: 0;
    background: #000;
    overflow: hidden;
}

.shorts-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    padding-top: max(16px, env(safe-area-inset-top));
    background: linear-gradient(to bottom, rgba(0,0,0,0.6) 0%, transparent 100%);
}

.shorts-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.8) 100%);
    backdrop-filter: blur(20px);
    display: flex;
    z-index: 100;
    padding-bottom: env(safe-area-inset-bottom);
}

/* 桌面端短视频居中 */
@media (min-width: 769px) {
    .shorts-wrapper {
        max-width: 420px;
        margin: 0 auto;
        border-left: 1px solid rgba(255,255,255,0.08);
        border-right: 1px solid rgba(255,255,255,0.08);
    }
    
    .shorts-header,
    .shorts-nav {
        max-width: 420px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* =============================================================================
   按钮优化
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* =============================================================================
   工具类
   ============================================================================= */

.hide-mobile {
    display: flex;
}

.hide-desktop {
    display: none;
}

@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }
    
    .hide-desktop {
        display: flex;
    }
}

/* =============================================================================
   Footer 脚链样式
   ============================================================================= */

.site-footer {
    background: linear-gradient(180deg, var(--bg-base) 0%, rgba(15, 15, 18, 1) 100%);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.5), transparent);
}

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

@media (max-width: 1024px) {
    .footer-main {
        grid-template-columns: 1fr 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 600px) {
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

/* Footer 品牌区域 */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    max-width: 32px;
    max-height: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.footer-logo-icon svg {
    width: 32px;
    height: 32px;
    display: block;
    flex-shrink: 0;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer-logo-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #e0d5ff 0%, #a78bfa 50%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo-tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 320px;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-social-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.footer-social-link:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: rgba(124, 58, 237, 0.3);
    color: var(--primary-light);
    transform: translateY(-2px);
}

/* Footer 链接列 */
.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-column-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: 12px;
}

.footer-column-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 14px;
    background: linear-gradient(180deg, var(--primary-light), var(--primary));
    border-radius: 2px;
}

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

.footer-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.footer-link:hover {
    color: var(--primary-light);
    transform: translateX(4px);
}

.footer-link .icon {
    width: 16px;
    height: 16px;
    opacity: 0.6;
}

/* Footer 底部信息栏 */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: var(--spacing-lg) 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-copyright .heart {
    color: #ef4444;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-legal-link {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-legal-link:hover {
    color: var(--primary-light);
}

/* Footer 装饰元素 */
.footer-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.footer-decoration::before {
    content: '';
    position: absolute;
    bottom: -100px;
    left: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.05) 0%, transparent 70%);
}

.footer-decoration::after {
    content: '';
    position: absolute;
    bottom: -50px;
    right: 15%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.04) 0%, transparent 70%);
}

.footer-content {
    position: relative;
    z-index: 1;
}

/* 移动端底部导航时隐藏部分footer内容 */
@media (max-width: 768px) {
    .site-footer {
        padding-bottom: 100px; /* 为底部导航留出空间 */
    }
}