/* ===== 404 主区域 ===== */
.error-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 24px 80px 24px;
    background: linear-gradient(165deg, #FFFFFF 0%, var(--primary-bg) 100%);
}
.error-content {
    text-align: center;
    max-width: 700px;
}
.error-content .error-emoji {
    font-size: 6rem;
    margin-bottom: 8px;
    display: block;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}
.error-content .error-code {
    font-size: 8rem;
    font-weight: 900;
    letter-spacing: -0.04em;
    color: var(--gray-900);
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.error-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}
.error-content p {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 480px;
    margin: 0 auto 32px auto;
}
.error-content .action-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.error-content .action-group .btn-primary,
.error-content .action-group .btn-outline {
    min-width: 160px;
}

/* 快速链接 */
.quick-links {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: center;
    gap: 24px 40px;
    flex-wrap: wrap;
}
.quick-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}
.quick-links a:hover {
    color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .error-content .error-code {
        font-size: 5.5rem;
    }
    .error-content .error-emoji {
        font-size: 4.5rem;
    }
    .error-content h2 {
        font-size: 1.6rem;
    }
    .error-content p {
        font-size: 1rem;
        padding: 0 12px;
    }
    .error-content .action-group {
        flex-direction: column;
        align-items: center;
    }
    .error-content .action-group .btn-primary,
    .error-content .action-group .btn-outline {
        width: 100%;
        max-width: 280px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .quick-links {
        gap: 14px 28px;
    }
    .quick-links a {
        font-size: 0.85rem;
    }
}
@media (max-width: 640px) {
    .navbar {
        height: auto;
        padding: 12px 24px;
    }
    .navbar .container {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 20px;
    }
    .nav-links a {
        font-size: 0.9rem;
        padding: 4px 0;
    }
    .error-content .error-code {
        font-size: 4rem;
    }
    .error-content .error-emoji {
        font-size: 3.5rem;
    }
    .error-content h2 {
        font-size: 1.3rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}