/* ====== 404.css - 独享CSS部分 - 404错误页面 ====== */
/* 404内容区域 - 水平居中 */
.error-404-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 120px 0;
    position: relative;
    overflow: hidden;
    flex-grow: 1;
}

.error-404-content {
    max-width: 800px;
    width: 100%;
    text-align: center;
    padding: 60px 40px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    z-index: 2;
    border: 1px solid rgba(0, 102, 204, 0.1);
    margin: 0 auto;
}

/* 背景装饰元素 */
.error-404-section:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.05) 0%, rgba(0, 160, 233, 0.02) 50%, transparent 70%);
    z-index: 1;
}

/* 404数字样式 */
.error-number {
    font-size: 15rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
    animation: float 6s ease-in-out infinite;
}

.error-number:after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 8px;
    background: var(--gradient-accent);
    border-radius: 4px;
    opacity: 0.7;
    filter: blur(4px);
}

/* 错误标题 */
.error-title {
    font-size: 3.5rem;
    margin-bottom: 30px;
    color: var(--dark-color);
}

/* 错误描述 */
.error-description {
    font-size: 1.3rem;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 操作按钮容器 */
.error-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 50px;
}

/* 搜索框样式 */
.search-box {
    max-width: 500px;
    margin: 40px auto 0;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 20px 30px;
    font-size: 1.1rem;
    border-radius: 50px;
    border: 2px solid rgba(0, 102, 204, 0.1);
    background: white;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 102, 204, 0.05);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.1);
}

.search-button {
    position: absolute;
    right: 10px;
    top: 10px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.search-button:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(0, 102, 204, 0.2);
}

/* 有用的链接部分 */
.useful-links {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(0, 102, 204, 0.05);
}

.useful-links h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--dark-color);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.link-item {
    background: var(--light-bg);
    padding: 25px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid rgba(0, 102, 204, 0.05);
    text-align: center;
}

.link-item:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: 0 15px 30px rgba(0, 102, 204, 0.1);
    border-color: rgba(0, 102, 204, 0.1);
}

.link-item i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
    display: block;
}

.link-item a {
    font-weight: 700;
    color: var(--dark-color);
    font-size: 1.1rem;
    display: block;
}

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

/* 脉动动画效果 */
.pulse-animation {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* 为404页面调整body和footer样式 */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.footer {
    margin-top: auto;
}

/* 响应式调整 - 404页面独享部分 */
@media (max-width: 1200px) {
    .error-number {
        font-size: 12rem;
    }
    
    .error-title {
        font-size: 3rem;
    }
    
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .error-404-content {
        padding: 50px 30px;
    }
    
    .error-number {
        font-size: 10rem;
    }
    
    .error-title {
        font-size: 2.5rem;
    }
    
    .error-description {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .error-number {
        font-size: 8rem;
    }
    
    .error-title {
        font-size: 2.2rem;
    }
    
    .error-description {
        font-size: 1.1rem;
    }
    
    .error-actions {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .error-404-content {
        padding: 40px 25px;
    }
}

@media (max-width: 480px) {
    .error-number {
        font-size: 6rem;
    }
    
    .error-title {
        font-size: 1.8rem;
    }
    
    .error-description {
        font-size: 1rem;
    }
    
    .error-404-content {
        padding: 30px 20px;
    }
    
    .link-item {
        padding: 20px 15px;
    }
    
    .link-item i {
        font-size: 2rem;
    }
}