/* 禁止文本选择和图像拖拽 */
* {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

img, video {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
}

/* 中式色调变量 */
:root {
    --primary-red: #d32f2f;
    --secondary-red: #f44336;
    --dark-red: #b71c1c;
    --glow-red: #ff5252;
    --gold: #ffd54f;
    --glow-gold: #ffeb3b;
    --dark-bg: #0c0c14;
    --card-bg: rgba(30, 20, 25, 0.85);
    --text-light: #ffffff;
    --text-gray: #cccccc;
    --border-glow: rgba(211, 47, 47, 0.4);
    --shadow-red: rgba(211, 47, 47, 0.3);
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 科技感背景 */
.tech-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(90deg, rgba(211, 47, 47, 0.05) 1px, transparent 1px) 0 0 / 50px 50px,
        linear-gradient(rgba(211, 47, 47, 0.05) 1px, transparent 1px) 0 0 / 50px 50px;
    opacity: 0.3;
}

.glow-spot-red {
    position: absolute;
    width: 400px;
    height: 400px;
    top: 20%;
    right: 10%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(211, 47, 47, 0.1) 0%, transparent 70%);
    filter: blur(80px);
    animation: floatGlow 20s ease-in-out infinite alternate;
}

.glow-spot-gold {
    position: absolute;
    width: 350px;
    height: 350px;
    bottom: 15%;
    left: 10%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 235, 59, 0.08) 0%, transparent 70%);
    filter: blur(80px);
    animation: floatGlow 25s ease-in-out infinite alternate-reverse;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, -30px) scale(1.1); }
}

.floating-hearts {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.heart {
    position: absolute;
    color: rgba(211, 47, 47, 0.2);
    font-size: 16px;
    opacity: 0;
    text-shadow: 0 0 10px rgba(255, 82, 82, 0.5);
    animation: floatHeart 15s linear infinite;
    pointer-events: none;
}

@keyframes floatHeart {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0.5;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

#wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 2;
}

/* 页面标题区域 - 中式科技感设计 */
.page-header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, 
        rgba(40, 20, 25, 0.9) 0%, 
        rgba(60, 25, 30, 0.9) 50%, 
        rgba(40, 20, 25, 0.9) 100%);
    color: var(--text-light);
    border-radius: 20px;
    margin-bottom: 40px;
    box-shadow: 
        0 15px 35px rgba(0, 0, 0, 0.5),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 0 30px rgba(211, 47, 47, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    position: relative;
    overflow: hidden;
}

.page-header:before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
        transparent 30%, 
        rgba(211, 47, 47, 0.1) 45%, 
        rgba(244, 67, 54, 0.2) 50%, 
        rgba(211, 47, 47, 0.1) 55%, 
        transparent 70%);
    border-radius: 22px;
    z-index: -1;
    opacity: 0.5;
    animation: borderGlow 3s linear infinite;
}

@keyframes borderGlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.page-title {
    font-size: 2.8rem;
    margin-bottom: 15px;
    font-weight: 300;
    letter-spacing: 2px;
    position: relative;
    display: inline-block;
}

.page-title:before,
.page-title:after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-red));
}

.page-title:before {
    left: -60px;
}

.page-title:after {
    right: -60px;
    background: linear-gradient(90deg, var(--primary-red), transparent);
}

.page-title:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--glow-red), transparent);
}

.title-highlight {
    background: linear-gradient(135deg, var(--glow-red), var(--primary-red), var(--secondary-red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 400;
    text-shadow: 0 0 20px rgba(255, 82, 82, 0.3);
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--text-gray);
}

/* 视频容器 - 中式科技感设计 */
.video-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    padding: 20px 0 50px;
}

.video-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.4),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    transition: var(--transition-smooth);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    cursor: pointer;
}

.video-item:before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
        transparent 30%, 
        rgba(211, 47, 47, 0.1) 45%, 
        rgba(244, 67, 54, 0.2) 50%, 
        rgba(211, 47, 47, 0.1) 55%, 
        transparent 70%);
    border-radius: 17px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.video-item:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--glow-red);
    box-shadow: 
        0 20px 40px rgba(179, 28, 28, 0.3),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 0 40px rgba(211, 47, 47, 0.15);
}

.video-item:hover:before {
    opacity: 1;
    animation: borderGlow 2s linear infinite;
}

video {
    width: 100%;
    height: 220px;
    display: block;
    object-fit: cover;
    border-radius: 15px 15px 0 0;
    border-bottom: 1px solid var(--border-glow);
    transition: transform 0.6s ease;
}

.video-item:hover video {
    transform: scale(1.05);
}

.video-info {
    padding: 20px;
    background: rgba(30, 20, 25, 0.9);
    border-radius: 0 0 15px 15px;
    position: relative;
}

.video-info:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--glow-red), var(--primary-red), transparent);
    opacity: 0.7;
}

.video-title {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 400;
    position: relative;
    padding-left: 25px;
}

.video-title:before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    background: var(--primary-red);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--glow-red);
}

.video-desc {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 导航按钮组 */
.nav-button-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin: 50px 0 30px;
    padding: 0 20px;
    flex-wrap: wrap;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 30px;
    background: linear-gradient(135deg, 
        rgba(40, 20, 25, 0.9) 0%, 
        rgba(30, 15, 20, 0.9) 100%);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 400;
    transition: var(--transition-smooth);
    box-shadow: 
        4px 4px 15px rgba(0, 0, 0, 0.6),
        -4px -4px 15px rgba(255, 255, 255, 0.05),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 0 25px rgba(211, 47, 47, 0.1);
    border: 1px solid var(--border-glow);
    position: relative;
    overflow: hidden;
    letter-spacing: 1px;
    min-width: 160px;
    cursor: pointer;
}

.nav-btn:hover {
    color: #ffcdd2;
    border-color: var(--glow-red);
    transform: translateY(-5px);
    box-shadow: 
        6px 6px 25px rgba(0, 0, 0, 0.8),
        -6px -6px 25px rgba(255, 255, 255, 0.1),
        inset 0 0 35px rgba(211, 47, 47, 0.15),
        0 0 30px rgba(211, 47, 47, 0.3);
}

.nav-btn:active {
    transform: translateY(-2px);
}

.nav-btn i {
    color: var(--glow-red);
    font-size: 18px;
    transition: transform 0.3s ease;
}

.nav-btn:hover i {
    transform: scale(1.2);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(211, 47, 47, 0.15), 
        transparent);
    transition: left 0.8s ease;
}

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

/* 不同按钮的特殊样式 */
.btn-prev i {
    margin-right: 10px;
}

.btn-next i {
    margin-left: 10px;
}

.btn-home {
    background: linear-gradient(135deg, 
        rgba(60, 25, 30, 0.9) 0%, 
        rgba(40, 20, 25, 0.9) 100%);
    min-width: 180px;
}

.btn-prev, .btn-next {
    min-width: 150px;
}

/* 按钮文字 */
.btn-text {
    font-weight: 500;
}

/* 装饰元素 */
.decoration {
    position: absolute;
    z-index: -1;
    opacity: 0.1;
    color: var(--primary-red);
    text-shadow: 0 0 20px var(--glow-red);
    pointer-events: none;
}

.decoration-1 {
    top: 15%;
    left: 5%;
    font-size: 5rem;
    animation: pulseGlow 4s ease-in-out infinite;
}

.decoration-2 {
    bottom: 15%;
    right: 5%;
    font-size: 5rem;
    animation: pulseGlow 4s ease-in-out infinite 2s;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.1; transform: scale(1); }
    50% { opacity: 0.2; transform: scale(1.1); }
}

/* 卡片动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.video-item {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

/* 禁用状态的按钮样式 */
.nav-btn.disabled {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
    filter: grayscale(0.8);
}

.nav-btn.disabled:hover {
    transform: none;
    border-color: var(--border-glow);
    box-shadow: 
        4px 4px 15px rgba(0, 0, 0, 0.6),
        -4px -4px 15px rgba(255, 255, 255, 0.05),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 0 25px rgba(211, 47, 47, 0.1);
}

.nav-btn.disabled i {
    color: rgba(211, 47, 47, 0.5);
}

.nav-btn.disabled .btn-text {
    color: rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.2rem;
    }
    
    .page-title:before,
    .page-title:after {
        width: 20px;
    }
    
    .page-title:before {
        left: -35px;
    }
    
    .page-title:after {
        right: -35px;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .video-container {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .nav-button-group {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-btn {
        width: 100%;
        max-width: 300px;
        padding: 14px 25px;
        font-size: 0.95rem;
    }
    
    .decoration {
        display: none;
    }
    
    .glow-spot-red,
    .glow-spot-gold {
        display: none;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .video-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-button-group {
        gap: 15px;
    }
    
    .nav-btn {
        min-width: 140px;
        padding: 14px 25px;
        font-size: 0.95rem;
    }
}

@media (min-width: 1200px) {
    .video-container {
        grid-template-columns: repeat(3, 1fr);
    }
}