/* ====== 404页面独享样式 ====== */
.error-hero {
    min-height: calc(100vh - 324px); /* 减去头部和页脚高度 */
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.08) 0%, rgba(0, 160, 233, 0.04) 100%);
    padding: 80px 0;
    flex-grow: 1;
}

.error-hero-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
    text-align: center;
    margin: 0 auto;
    width: 100%;
}

.error-number {
    font-size: 15rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 30px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
    position: relative;
    display: inline-block;
}

.error-number:after {
    content: '';
    position: absolute;
    bottom: 10px;
    right: 50%;
    transform: translateX(50%);
    width: 200px;
    height: 10px;
    background: var(--gradient-primary);
    border-radius: 5px;
    opacity: 0.2;
    filter: blur(5px);
}

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

.error-description {
    font-size: 1.4rem;
    margin-bottom: 50px;
    color: var(--gray-color);
    max-width: 700px;
    margin-right: auto;
    margin-left: auto;
}

.error-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 50px;
}

.error-illustration {
    max-width: 500px;
    margin: 0 auto 60px;
    position: relative;
}

.error-illustration img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transform: rotate(-5deg);
    transition: var(--transition);
}

.error-illustration:hover img {
    transform: rotate(0deg);
}

.error-illustration:before {
    content: '';
    position: absolute;
    top: 20px;
    right: -20px;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    opacity: 0.1;
    z-index: -1;
    transform: rotate(5deg);
}

/* ====== 有用的链接 ====== */
.useful-links {
    position: relative;
    background: white;
    border-radius: var(--border-radius);
    padding: 70px;
    box-shadow: var(--box-shadow);
    margin-top: 80px;
    max-width: 1000px;
    margin-right: auto;
    margin-left: auto;
}

.links-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.links-header h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.links-header p {
    font-size: 1.25rem;
    color: var(--gray-color);
}

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

.link-card {
    background: rgba(0, 102, 204, 0.03);
    border-radius: var(--border-radius);
    padding: 35px 25px;
    text-align: center;
    border: 1px solid rgba(0, 102, 204, 0.1);
    transition: var(--transition);
}

.link-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.12);
    border-color: rgba(0, 102, 204, 0.2);
    background: rgba(0, 102, 204, 0.06);
}

.link-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.link-card h4 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.link-card p {
    font-size: 1.05rem;
    color: var(--gray-color);
    margin-bottom: 25px;
}

/* ====== 搜索框 ====== */
.search-section {
    position: relative;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.05) 0%, rgba(0, 160, 233, 0.02) 100%);
    border-radius: var(--border-radius);
    padding: 60px 40px;
    margin-top: 80px;
    max-width: 800px;
    margin-right: auto;
    margin-left: auto;
}

.search-header {
    text-align: center;
    margin-bottom: 50px;
}

.search-header h3 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.search-header p {
    font-size: 1.2rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.search-input {
    flex: 1;
    min-width: 250px;
    padding: 18px 25px;
    border-radius: 50px;
    border: none;
    font-size: 1.05rem;
    font-family: 'Cairo', sans-serif;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    border: 2px solid rgba(0, 102, 204, 0.1);
}

.search-input:focus {
    outline: none;
    box-shadow: 0 5px 25px rgba(0, 102, 204, 0.15);
    border-color: rgba(0, 102, 204, 0.3);
}

/* ====== 404页面特定动画 ====== */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
    20%, 40%, 60%, 80% { transform: translateX(10px); }
}

.shake-animation {
    animation: shake 1s ease-in-out;
}

/* ====== 404页面响应式设计 ====== */
@media (max-width: 1200px) {
    .error-number {
        font-size: 12rem;
    }
    
    .error-title {
        font-size: 3rem;
    }
    
    .useful-links {
        padding: 50px;
    }
}

@media (max-width: 992px) {
    .error-hero {
        min-height: calc(100vh - 304px);
        padding: 60px 0;
    }
    
    .error-number {
        font-size: 10rem;
    }
    
    .error-title {
        font-size: 2.5rem;
    }
    
    .error-description {
        font-size: 1.2rem;
    }
    
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .useful-links, .search-section {
        padding: 40px 30px;
    }
}

@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;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-input {
        width: 100%;
    }
    
    .error-hero {
        min-height: calc(100vh - 284px);
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .error-number {
        font-size: 6rem;
    }
    
    .error-title {
        font-size: 1.8rem;
    }
    
    .links-header h2, .search-header h3 {
        font-size: 1.8rem;
    }
    
    .error-description {
        font-size: 1rem;
    }
    
    .useful-links, .search-section {
        padding: 30px 20px;
    }
}