/* ========================================
   404 页面样式
   - 目的: 创建炫酷的 404 错误页面视觉效果
   - 实现: 粒子背景、故障文字效果、卡片动画
   ======================================== */

/* 粒子背景画布 - 全屏覆盖 */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ========== 故障效果 (Glitch Effect) ========== */
.glitch-wrapper {
    position: relative;
}

.glitch {
    font-size: 6rem;
    font-weight: 900;
    color: #fff;
    position: relative;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
    animation: glitch-skew 1s infinite linear alternate-reverse;
}

/* 中等屏幕字体调整 */
@media (min-width: 768px) {
    .glitch {
        font-size: 10rem;
    }
}

/* 故障效果伪元素 - 左侧偏移层 */
.glitch::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #fff;
    background: transparent;
    clip: rect(0, 900px, 0, 0);
    animation: glitch-anim 2s infinite linear alternate-reverse;
    text-shadow: -2px 0 #ff00ff;
}

/* 故障效果伪元素 - 右侧偏移层 */
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #fff;
    background: transparent;
    clip: rect(0, 900px, 0, 0);
    animation: glitch-anim2 2s infinite linear alternate-reverse;
    text-shadow: 2px 0 #00ffff;
}

/* 故障动画 - 左层裁剪动画 */
@keyframes glitch-anim {
    0% { clip: rect(42px, 9999px, 44px, 0); transform: skew(0.5deg); }
    5% { clip: rect(12px, 9999px, 59px, 0); transform: skew(0.3deg); }
    10% { clip: rect(48px, 9999px, 29px, 0); transform: skew(0.7deg); }
    15% { clip: rect(42px, 9999px, 73px, 0); transform: skew(0.1deg); }
    20% { clip: rect(63px, 9999px, 27px, 0); transform: skew(0.4deg); }
    25% { clip: rect(34px, 9999px, 55px, 0); transform: skew(0.6deg); }
    30% { clip: rect(86px, 9999px, 73px, 0); transform: skew(0.2deg); }
    35% { clip: rect(20px, 9999px, 20px, 0); transform: skew(0.8deg); }
    40% { clip: rect(26px, 9999px, 60px, 0); transform: skew(0.1deg); }
    45% { clip: rect(25px, 9999px, 66px, 0); transform: skew(0.5deg); }
    50% { clip: rect(57px, 9999px, 98px, 0); transform: skew(0.3deg); }
    55% { clip: rect(5px, 9999px, 46px, 0); transform: skew(0.7deg); }
    60% { clip: rect(82px, 9999px, 31px, 0); transform: skew(0.1deg); }
    65% { clip: rect(54px, 9999px, 27px, 0); transform: skew(0.4deg); }
    70% { clip: rect(28px, 9999px, 99px, 0); transform: skew(0.6deg); }
    75% { clip: rect(45px, 9999px, 69px, 0); transform: skew(0.2deg); }
    80% { clip: rect(23px, 9999px, 85px, 0); transform: skew(0.8deg); }
    85% { clip: rect(54px, 9999px, 84px, 0); transform: skew(0.1deg); }
    90% { clip: rect(45px, 9999px, 47px, 0); transform: skew(0.5deg); }
    95% { clip: rect(37px, 9999px, 20px, 0); transform: skew(0.3deg); }
    100% { clip: rect(4px, 9999px, 91px, 0); transform: skew(0.7deg); }
}

/* 故障动画 - 右层裁剪动画 */
@keyframes glitch-anim2 {
    0% { clip: rect(65px, 9999px, 100px, 0); transform: skew(0.3deg); }
    5% { clip: rect(52px, 9999px, 74px, 0); transform: skew(0.6deg); }
    10% { clip: rect(79px, 9999px, 85px, 0); transform: skew(0.1deg); }
    15% { clip: rect(75px, 9999px, 5px, 0); transform: skew(0.4deg); }
    20% { clip: rect(67px, 9999px, 61px, 0); transform: skew(0.7deg); }
    25% { clip: rect(14px, 9999px, 79px, 0); transform: skew(0.2deg); }
    30% { clip: rect(1px, 9999px, 66px, 0); transform: skew(0.8deg); }
    35% { clip: rect(86px, 9999px, 30px, 0); transform: skew(0.1deg); }
    40% { clip: rect(23px, 9999px, 98px, 0); transform: skew(0.5deg); }
    45% { clip: rect(85px, 9999px, 72px, 0); transform: skew(0.3deg); }
    50% { clip: rect(71px, 9999px, 75px, 0); transform: skew(0.6deg); }
    55% { clip: rect(2px, 9999px, 48px, 0); transform: skew(0.1deg); }
    60% { clip: rect(30px, 9999px, 16px, 0); transform: skew(0.4deg); }
    65% { clip: rect(59px, 9999px, 50px, 0); transform: skew(0.7deg); }
    70% { clip: rect(41px, 9999px, 62px, 0); transform: skew(0.2deg); }
    75% { clip: rect(2px, 9999px, 82px, 0); transform: skew(0.8deg); }
    80% { clip: rect(47px, 9999px, 73px, 0); transform: skew(0.1deg); }
    85% { clip: rect(3px, 9999px, 27px, 0); transform: skew(0.5deg); }
    90% { clip: rect(26px, 9999px, 55px, 0); transform: skew(0.3deg); }
    95% { clip: rect(42px, 9999px, 25px, 0); transform: skew(0.6deg); }
    100% { clip: rect(38px, 9999px, 45px, 0); transform: skew(0.1deg); }
}

/* 故障倾斜动画 */
@keyframes glitch-skew {
    0% { transform: skew(-0.5deg); }
    10% { transform: skew(0.5deg); }
    20% { transform: skew(-0.5deg); }
    30% { transform: skew(0deg); }
    40% { transform: skew(0.5deg); }
    50% { transform: skew(-0.3deg); }
    60% { transform: skew(0.8deg); }
    70% { transform: skew(-0.1deg); }
    80% { transform: skew(0.4deg); }
    90% { transform: skew(-0.2deg); }
    100% { transform: skew(0deg); }
}

/* ========== 卡片样式 ========== */
.card {
    background: rgba(31, 41, 55, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(75, 85, 99, 0.3);
    border-radius: 0.75rem;
    padding: 1.25rem;
    text-align: center;
    transition: all 0.3s ease;
    animation: card-fade-in 0.6s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

/* 卡片依次出现动画延迟 */
.card:nth-child(1) { animation-delay: 0.2s; }
.card:nth-child(2) { animation-delay: 0.4s; }
.card:nth-child(3) { animation-delay: 0.6s; }

/* 卡片悬浮效果 */
.card:hover {
    transform: translateY(-3px);
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2),
                0 0 20px rgba(139, 92, 246, 0.08);
}

/* 卡片图标容器 */
.card-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
    transition: transform 0.3s ease;
}

/* 卡片悬浮时图标放大 */
.card:hover .card-icon {
    transform: scale(1.1);
}

/* 卡片渐入动画 */
@keyframes card-fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 文字渐入动画 ========== */
.animate-fade-in {
    animation: fade-in 0.8s ease-out forwards;
}

.animate-fade-in-delay {
    animation: fade-in 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

.animate-fade-in-delay-2 {
    animation: fade-in 0.8s ease-out 0.8s forwards;
    opacity: 0;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 扫描线效果 ========== */
.scanline {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        transparent 50%,
        rgba(0, 0, 0, 0.05) 51%
    );
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 100;
    opacity: 0.2;
}

/* ========== 脉冲动画 ========== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}