/* ============================================
   页脚样式 - 浙江宁轩建筑装饰工程有限公司
   ============================================ */

@import url('variables.css');

/* ===== 页脚容器 ===== */
.footer {
    background: radial-gradient(circle at top left, rgba(103, 65, 160, 0.35), transparent 55%),
                radial-gradient(circle at top right, rgba(245, 201, 143, 0.25), transparent 60%),
                linear-gradient(160deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, #1a0d28 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) var(--container-padding);
    margin-top: var(--spacing-3xl);
    position: relative;
    overflow: hidden;
}

.footer-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

/* ===== 页脚主体 ===== */
.footer-main {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: var(--border-width-thin) solid rgba(255, 255, 255, 0.2);
}

/* ===== 页脚列 ===== */
.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-column h3 {
    font-size: var(--font-size-h5);
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    border-bottom: var(--border-width-thin) solid rgba(245, 201, 143, 0.6);
    padding-bottom: var(--spacing-md);
    letter-spacing: 0.04em;
}

.footer-column ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.footer-column a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
    transition: width var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-accent-light);
    padding-left: 4px;
}

.footer-column a:hover::after {
    width: 24px;
}

/* ===== 关于我们列 ===== */
.footer-about {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-about-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-about-logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    box-shadow: var(--box-shadow-md);
}

.footer-about-logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer-about-logo-main {
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
}

.footer-about-logo-sub {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.footer-about-desc {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    opacity: 0.9;
}

/* ===== 联系方式 ===== */
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.footer-contact-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: var(--font-size-sm);
}

.footer-contact-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: var(--font-size-sm);
}

.footer-contact-label {
    opacity: 0.8;
    font-size: var(--font-size-xs);
}

.footer-contact-value {
    font-weight: var(--font-weight-medium);
}

/* ===== 社交媒体 ===== */
.footer-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.footer-social-link {
    width: 40px;
    height: 40px;
    background-color: var(--color-accent);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-size: var(--font-size-lg);
}

.footer-social-link:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-3px);
}

/* ===== 页脚底部 ===== */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: var(--border-width-thin) solid rgba(255, 255, 255, 0.2);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--box-shadow-lg);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-xl);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .footer {
        padding: var(--spacing-xl) var(--container-padding);
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }

    .footer-column h3 {
        font-size: var(--font-size-h6);
        margin-bottom: var(--spacing-md);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 44px;
        height: 44px;
        font-size: var(--font-size-base);
    }
}

@media (min-width: 577px) and (max-width: 1024px) {
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}