/**
 * 雪境·智慧VR全景平台 - 科技毛玻璃风格CSS
 * 版本: 3.0
 * 更新日期: 2026-04-16
 * 版权由内蒙古智慧同城信息科技有限责任公司 张瑞雪 所有
 * 技术服务电话：400-8917-885
 */

/* ==================== 毛玻璃科技风格变量 ==================== */
:root {
    /* 主色调 - 科技蓝 */
    --primary: #4facfe;
    --primary-dark: #3d8bfc;
    --primary-light: #7ec5ff;
    --primary-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
    --primary-glow: rgba(79, 172, 254, 0.5);

    /* 渐变背景色 */
    --accent: #667eea;
    --accent-gradient: linear-gradient(135deg, #764ba2 0%, #667eea 100%);

    /* 霓虹色系 */
    --neon-blue: #00d4ff;
    --neon-purple: #b721ff;
    --neon-green: #00ff88;
    --neon-pink: #ff0080;

    /* 功能色 */
    --success: #00e676;
    --success-glow: rgba(0, 230, 118, 0.3);
    --warning: #ffab00;
    --warning-glow: rgba(255, 171, 0, 0.3);
    --danger: #ff1744;
    --danger-glow: rgba(255, 23, 68, 0.3);
    --info: #00b0ff;

    /* 毛玻璃背景 */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-hover: rgba(255, 255, 255, 0.12);
    --glass-bg-active: rgba(255, 255, 255, 0.16);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-border-hover: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);

    /* 深色毛玻璃 */
    --glass-dark: rgba(0, 0, 0, 0.4);
    --glass-dark-border: rgba(255, 255, 255, 0.1);

    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --text-accent: var(--primary);

    /* 背景渐变 */
    --bg-dark: linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 35%, #16213e 70%, #0f3460 100%);
    --bg-dots: radial-gradient(circle, rgba(79, 172, 254, 0.1) 1px, transparent 1px);
    --bg-grid: linear-gradient(rgba(79, 172, 254, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(79, 172, 254, 0.05) 1px, transparent 1px);

    /* 发光效果 */
    --glow-primary: 0 0 20px rgba(79, 172, 254, 0.4);
    --glow-secondary: 0 0 40px rgba(102, 126, 234, 0.4);
    --glow-text: 0 0 10px rgba(79, 172, 254, 0.8);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 布局 */
    --header-height: 70px;
    --container-max: 1400px;
}

/* ==================== 基础样式重置 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    background-image: var(--bg-dots);
    background-size: 20px 20px;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

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

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

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

ul, ol {
    list-style: none;
}

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

/* ==================== 背景动画效果 ==================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bg-animation::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 80%, rgba(79, 172, 254, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(0, 212, 255, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 60% 60%, rgba(171, 33, 255, 0.1) 0%, transparent 30%);
    animation: bgFloat 20s ease-in-out infinite;
}

.bg-animation::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: var(--bg-grid);
    background-size: 40px 40px;
    opacity: 0.7;
    animation: gridMove 30s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(40px, 40px); }
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(2%, 2%) rotate(1deg); }
    50% { transform: translate(-1%, 3%) rotate(-1deg); }
    75% { transform: translate(3%, -2%) rotate(2deg); }
}

/* ==================== 毛玻璃容器 ==================== */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-normal);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), var(--glow-primary);
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow);
}

/* ==================== 渐变文字 ==================== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--neon-blue) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-glow {
    text-shadow: var(--glow-text);
}

/* ==================== 容器与布局 ==================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding-top: var(--header-height);
}

/* 网格布局 */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* Flex布局 */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }

/* ==================== 毛玻璃导航栏 ==================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(15, 12, 41, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    font-size: var(--font-size-lg);
    box-shadow: var(--glow-primary);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
    animation: logoShine 3s ease-in-out infinite;
}

@keyframes logoShine {
    0%, 100% { transform: translateX(-100%) rotate(45deg); }
    50% { transform: translateX(100%) rotate(45deg); }
}

.logo-text h1 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.logo-text span {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-normal);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 0.15;
}

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

.nav-link i {
    font-size: var(--font-size-md);
    position: relative;
    z-index: 1;
}

.nav-link span {
    position: relative;
    z-index: 1;
}

/* 头部按钮 */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* 毛玻璃图标按钮 */
.btn-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-md);
    transition: var(--transition-normal);
}

.btn-icon:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: var(--primary);
    box-shadow: var(--glow-primary);
}

/* 毛玻璃主要按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--primary-gradient);
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    box-shadow: var(--glow-primary);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(79, 172, 254, 0.5);
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-bg-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-glass:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glow-primary);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 42px;
    height: 42px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    align-items: center;
    justify-content: center;
}

/* 移动端遮罩 */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
}

.mobile-menu-overlay.active {
    display: block;
}

/* ==================== 页面标题区 ==================== */
.page-header {
    padding: var(--space-3xl) 0;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(79, 172, 254, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    position: relative;
}

.page-title i {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: var(--space-sm);
}

.page-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== 毛玻璃筛选栏 ==================== */
.filter-section {
    padding: var(--space-lg) 0;
}

.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    flex-wrap: wrap;
}

.filter-scroll {
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    flex: 1;
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    white-space: nowrap;
    transition: var(--transition-normal);
}

.filter-btn:hover {
    background: var(--glass-bg-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    box-shadow: var(--glow-primary);
}

.filter-sort {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.select-styled {
    padding: var(--space-sm) var(--space-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* ==================== 内容网格 ==================== */
.content-section {
    padding: var(--space-xl) 0;
}

.vr-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

/* 毛玻璃VR卡片 */
.vr-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
}

.vr-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--glass-shadow), 0 20px 50px rgba(79, 172, 254, 0.2);
    border-color: var(--primary);
}

.vr-thumbnail {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.vr-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.vr-card:hover .vr-thumbnail img {
    transform: scale(1.1);
}

.vr-badge {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--primary-gradient);
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-sm);
    box-shadow: var(--glow-primary);
}

.vr-badge.new {
    background: linear-gradient(135deg, var(--neon-green), #00c853);
}

.vr-badge.hot {
    background: linear-gradient(135deg, var(--neon-pink), #ff4081);
}

.vr-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

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

.vr-play-btn {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    font-size: 24px;
    box-shadow: var(--glow-primary);
    transform: scale(0.8);
    transition: var(--transition-normal);
}

.vr-card:hover .vr-play-btn {
    transform: scale(1);
}

.vr-play-btn:hover {
    box-shadow: 0 0 40px rgba(79, 172, 254, 0.6);
}

.vr-info {
    padding: var(--space-lg);
}

.vr-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.vr-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.vr-meta {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

.vr-meta i {
    margin-right: var(--space-xs);
    color: var(--primary);
}

.vr-tags {
    display: flex;
    gap: var(--space-sm);
}

.tag {
    display: inline-block;
    padding: 2px var(--space-sm);
    background: rgba(79, 172, 254, 0.15);
    border: 1px solid rgba(79, 172, 254, 0.3);
    border-radius: var(--radius-sm);
    color: var(--primary);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* 加载更多 */
.load-more {
    text-align: center;
    padding: var(--space-xl) 0;
}

/* ==================== 毛玻璃页脚 ==================== */
.main-footer {
    background: rgba(10, 8, 30, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-2xl);
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.footer-brand {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.footer-brand .logo-icon {
    margin: 0 auto var(--space-md);
}

.footer-brand h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

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

.link-group h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-sm);
}

.link-group a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

/* ==================== 动画效果 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(79, 172, 254, 0.4); }
    50% { box-shadow: 0 0 40px rgba(79, 172, 254, 0.6); }
}

@keyframes borderGlow {
    0%, 100% { border-color: rgba(79, 172, 254, 0.3); }
    50% { border-color: rgba(79, 172, 254, 0.8); }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 991px) {
    .main-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        height: 100vh;
        background: rgba(15, 12, 41, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-2xl) var(--space-lg);
        gap: var(--space-sm);
        z-index: 1001;
        box-shadow: var(--glass-shadow);
    }

    .main-nav.active {
        display: flex;
    }

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

    .nav-link {
        width: 100%;
        padding: var(--space-md);
        border-bottom: 1px solid var(--glass-border);
        border-radius: 0;
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    :root {
        --header-height: 60px;
    }

    .container {
        padding: 0 var(--space-md);
    }

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

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-sort {
        display: none;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .hide-on-mobile {
        display: none;
    }
}

@media (max-width: 575px) {
    .logo-text {
        display: none;
    }

    .btn {
        padding: var(--space-sm) var(--space-md);
    }

    .btn-lg {
        padding: var(--space-md) var(--space-lg);
    }
}

/* 超大屏幕 */
@media (min-width: 1400px) {
    .container {
        max-width: 1600px;
    }

    .grid-4 {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ==================== 工具类 ==================== */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.text-gradient { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-md { font-size: var(--font-size-md); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.w-full { width: 100%; }
.hidden { display: none !important; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }