/* ============================================================
 * AKSRT Footer — v4.0 Zibll-Inspired
 *
 * 包含：
 * - 页脚主体（Bootstrap Grid）
 * - 浮动右侧按钮组
 * - 移动端底部 Tab 栏
 * ============================================================ */

/* ============================================================
 * 页脚主体
 * ============================================================ */
:root {
    --aksrt-footer-tabbar-height: 49px;
}

.site-footer {
    margin-top: auto;
    background: var(--footer-bg, var(--surface-1));
    border-top: 1px solid rgba(255, 255, 255, 0.55);
    padding: 34px 30px 30px;
}

.site-footer__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 16px;
}

@media (min-width: 768px) {
    .site-footer__inner {
        padding: 0 24px;
    }
}

.site-footer__grid {
    padding-bottom: 32px;
}

.site-footer__brand {
    margin-bottom: 24px;
}

.site-footer__title {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 12px;
    color: var(--color-ink);
}

.site-footer__desc {
    font-size: 14px;
    color: var(--color-ink-4);
    line-height: 1.6;
    margin: 0 0 16px;
    max-width: 360px;
}

.site-footer__col {
    margin-bottom: 24px;
}

.site-footer__col ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer__col li {
    margin-bottom: 8px;
}

.site-footer__col a {
    font-size: 14px;
    color: var(--footer-color, var(--color-ink-3));
    transition: color 0.15s ease;
}

.site-footer__col a:hover {
    color: var(--focus-color, var(--color-primary));
}

/* 社交链接行 */
.social-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.social-row a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--surface-4);
    border: none;
    box-shadow: var(--shadow-sm);
    color: var(--color-ink-3);
    transition: background 0.2s, color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.social-row a:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.social-row .social-icon-link {
    background: var(--surface-3);
    color: var(--color-ink-3);
}

.social-row .social-icon-link:hover {
    background: var(--color-primary);
    color: #fff;
}

/* 友情链接 */
.site-footer__friends {
    margin-top: 16px;
}

.site-footer__friends-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-ink-4);
    margin: 0 0 8px;
}

.site-footer__friends-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
}

.site-footer__friends-list a {
    font-size: 0.8125rem;
    color: var(--color-ink-4);
}

.site-footer__friends-list a:hover {
    color: var(--color-primary);
}

/* 底部栏 */
.site-footer__bottom {
    border-top: 1px solid var(--color-line);
    padding: 20px 0;
    text-align: center;
}

.site-footer__filings {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.site-footer__filings a {
    font-size: 0.75rem;
    color: var(--color-ink-4);
}

.site-footer__filings a:hover {
    color: var(--color-primary);
}

.site-footer__copyright {
    font-size: 12px;
    color: var(--color-ink-4);
    margin: 0;
}

/* §2.3 三列结构化字段 */

/* 品牌 Logo */
.site-footer__logo {
    margin-bottom: 16px;
}
.site-footer__logo-img {
    max-height: 48px;
    width: auto;
}
.site-footer__logo-img--dark {
    display: none;
}
[data-theme="dark"] .site-footer__logo-img--light {
    display: none;
}
[data-theme="dark"] .site-footer__logo-img--dark {
    display: inline-block;
}

/* 标准联系项 */
.site-footer__contact-std {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 12px 0;
}
.site-footer__contact-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--surface-4, rgba(0,0,0,.05));
    border: none;
    box-shadow: var(--shadow-sm);
    color: var(--color-ink-3, #888);
    font-size: 16px;
    position: relative;
    cursor: pointer;
    text-decoration: none;
    transition: background .2s, color .2s, box-shadow .2s;
}
.site-footer__contact-item:hover,
.site-footer__contact-item:focus {
    background: var(--color-primary);
    color: #fff;
}
.site-footer__contact-hover {
    display: none;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    padding: 8px;
    background: var(--surface-1, #fff);
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 10;
    white-space: nowrap;
}
.site-footer__contact-hover img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 4px;
}
.site-footer__contact-item:hover .site-footer__contact-hover,
.site-footer__contact-item:focus .site-footer__contact-hover {
    display: block;
}

/* 自定义代码区域 */
.site-footer__custom-code,
.site-footer__customize-code {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--color-ink-4, #999);
}

/* 二维码图片组 */
.site-footer__mini-qr {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 20px 0;
    border-top: 1px solid var(--color-line, #eee);
}
.site-footer__mini-qr-item {
    text-align: center;
}
.site-footer__mini-qr-item img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--color-line, #eee);
}
.site-footer__mini-qr-item span {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--color-ink-4, #999);
}

/* 设备可见性工具类 */
@media (max-width: 767px) {
    .hide-on-mobile { display: none !important; }
}
@media (min-width: 768px) {
    .hide-on-desktop { display: none !important; }
}

/* ============================================================
 * 浮动右侧按钮组（模仿 zibll float-right）
 * ============================================================ */
/* 对齐 zibll: bottom 60px, z-index 1030 */
.float-right-btns {
    position: fixed;
    right: 20px;
    bottom: 60px;
    z-index: 1030;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: opacity 0.3s ease;