/* ========== Footer 基础样式 ========== */
.site-footer {
    background: #0a0a0a;
    color: #666;
    padding: 72px 0 32px;
    margin-top: 80px;
    border: none !important;
}
.site-footer .container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 80px;
    align-items: start;
}
.footer-logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0 0 16px;
}
.footer-logo-icon {
    flex-shrink: 0;
    border-radius: 8px;
    display: block;
}
.footer-logo-text {
    font-size: 22px;
    font-weight: 800;
    color: #f0f0f0 !important;
    letter-spacing: -0.3px;
    line-height: 36px;
}
.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #555 !important;
    margin: 0 0 24px;
}
.footer-social {
    display: flex;
    gap: 10px;
}
.social-link {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: #151515;
    border: 1px solid #222;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #777 !important;
    transition: all .25s ease;
    text-decoration: none;
}
.social-link svg {
    width: 16px;
    height: 16px;
}
.social-link:hover {
    background: #1a1a1a;
    border-color: #333;
    color: #f0f0f0 !important;
    transform: translateY(-2px);
}
.footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.footer-links h4 {
    font-size: 15px;
    font-weight: 700;
    color: #f0f0f0 !important;
    margin: 0 0 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.footer-links nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a {
    font-size: 14px;
    color: #777 !important;
    text-decoration: none;
    transition: all .2s;
    display: inline-block;
}
.footer-links a:hover {
    color: #f0f0f0 !important;
    transform: translateX(4px);
}
.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #222, transparent);
    margin: 48px 0 24px;
    border: none !important;
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    border: none !important;
    position: static;
}
.footer-bottom::before,
.footer-bottom::after {
    display: none !important;
    content: none !important;
}
.footer-bottom-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.footer-copyright {
    font-size: 14.5px;
    color: #444 !important;
    margin: 0;
    line-height: 1.6;
}
.footer-copyright a {
    color: #666 !important;
    text-decoration: none;
    transition: color .2s;
}
.footer-copyright a:hover {
    color: #f0f0f0 !important;
}
.footer-icp {
    font-size: 12px;
    color: #333 !important;
    margin: 0;
}
.footer-rss {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #555 !important;
    text-decoration: none;
    transition: all .2s;
    padding: 6px 12px;
    border-radius: 6px;
    background: #151515;
    border: 1px solid #222;
}
.footer-rss svg {
    width: 14px;
    height: 14px;
    color: #ff6600;
}
.footer-rss span {
    color: #666;
}
.footer-rss:hover {
    background: #1a1a1a;
    border-color: #333;
}
.footer-rss:hover span {
    color: #f0f0f0;
}

/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    right: 14px;
    top: calc(55% + 120px);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(.9);
    transition: all .35s cubic-bezier(.22, 1, .36, 1);
    z-index: 999;
    padding: 0;
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.back-to-top:hover {
    color: #555;
    border-color: #ccc;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
}
.btt-icon {
    transition: none;
}
.back-to-top:hover .btt-icon {
    transform: none;
}

/* ========== 二维码按钮 ========== */
.qr-btn {
    position: fixed;
    right: 14px;
    top: calc(55% - 60px);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(.9);
    transition: all .35s cubic-bezier(.22, 1, .36, 1);
    z-index: 999;
    padding: 0;
}
.qr-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.qr-btn:hover {
    color: #555;
    border-color: #ccc;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
}
.qr-icon {
    transition: none;
}
.qr-btn:hover .qr-icon {
    transform: none;
}

/* ========== 意见反馈按钮（新增） ========== */
.feedback-btn {
    position: fixed;
    right: 14px;
    top: 55%;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(.9);
    transition: all .35s cubic-bezier(.22, 1, .36, 1);
    z-index: 999;
    padding: 0;
}
.feedback-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.feedback-btn:hover {
    color: #555;
    border-color: #ccc;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
}

/* ========== 统一 Tooltip ========== */
.btn-tooltip {
    position: absolute;
    right: 56px;
    top: 50%;
    transform: translateY(-50%) translateX(12px);
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 8px 14px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .08);
    white-space: nowrap;
    font-size: 12px;
    color: #777;
    letter-spacing: 0.2px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all .3s cubic-bezier(.22, 1, .36, 1);
    z-index: 1000;
}
.btn-tooltip::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    margin-top: -4px;
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-right: 1px solid #e5e5e5;
    border-top: 1px solid #e5e5e5;
    transform: rotate(45deg);
}
.qr-btn:hover .btn-tooltip,
.back-to-top:hover .btn-tooltip,
.ai-label-btn:hover .btn-tooltip,
.feedback-btn:hover .btn-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}

/* ========== 二维码 Popup ========== */
.qr-popup {
    position: absolute;
    right: 56px;
    top: 50%;
    transform: translateY(-50%) translateX(12px);
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
    width: 240px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all .3s cubic-bezier(.22, 1, .36, 1);
    z-index: 1000;
}
.qr-popup.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
    pointer-events: auto;
}
.qr-popup::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    margin-top: -4px;
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-right: 1px solid #e5e5e5;
    border-top: 1px solid #e5e5e5;
    transform: rotate(45deg);
}
.qr-popup-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 368px;
    overflow-y: auto;
}
.qr-card {
    text-align: center;
}
.qr-img-wrap {
    width: 160px;
    height: 160px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
}
.qr-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}
.qr-card-name {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-top: 10px;
}
.qr-card-desc {
    display: block;
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}
.qr-btn:has(.qr-popup.show) .btn-tooltip,
.ai-label-btn:has(#aiLabelPopup.show) .btn-tooltip {
    opacity: 0;
    visibility: hidden;
}

/* ========== 居中反馈弹窗（新增） ========== */
.feedback-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    opacity: 0;
    transition: opacity 0.25s ease;
    padding: 20px;
    box-sizing: border-box;
}
.feedback-modal-overlay.show {
    display: flex;
    opacity: 1;
}
.feedback-modal {
    background: #fff;
    border-radius: 16px;
    width: 480px;
    max-width: 100%;
    max-height: calc(100vh - 40px);
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 70px rgba(0,0,0,0.18), 0 10px 25px rgba(0,0,0,0.1);
    overflow: hidden;
    transform: translateY(16px) scale(0.96);
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}
.feedback-modal-overlay.show .feedback-modal {
    transform: translateY(0) scale(1);
}
.feedback-modal-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.feedback-modal-header h3 {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
    color: #1a1a1a;
}
.feedback-modal-close {
    background: none;
    border: none;
    font-size: 22px;
    color: #999;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.feedback-modal-close:hover {
    background: #f4f5f7;
    color: #333;
}
.feedback-modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}
.feedback-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin: 0 0 20px;
}
.feedback-form-group {
    margin-bottom: 16px;
}
.feedback-textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px 14px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    color: #1a1a1a;
    background: #f8f9fa;
    transition: all .2s;
    box-sizing: border-box;
    font-family: inherit;
    resize: vertical;
}
.feedback-textarea:focus {
    outline: none;
    border-color: #1a1a1a;
    background: #fff;
}
.feedback-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    color: #1a1a1a;
    background: #f8f9fa;
    transition: all .2s;
    box-sizing: border-box;
    font-family: inherit;
}
.feedback-input:focus {
    outline: none;
    border-color: #1a1a1a;
    background: #fff;
}
.feedback-hint {
    font-size: 13px;
    color: #999;
    margin: -8px 0 12px;
}
.feedback-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 8px;
}
.feedback-btn-cancel {
    padding: 10px 20px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    color: #666;
    cursor: pointer;
    transition: all .2s;
}
.feedback-btn-cancel:hover {
    border-color: #ccc;
    color: #333;
}
.feedback-btn-submit {
    padding: 10px 24px;
    background: #111;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity .2s;
}
.feedback-btn-submit:hover {
    opacity: .85;
}
.feedback-success {
    padding: 40px 20px;
    text-align: center;
    font-size: 15px;
    color: #22c55e;
    font-weight: 600;
}
.feedback-error {
    margin-bottom: 16px;
    padding: 10px 14px;
    background: #fff2f0;
    border: 1px solid #ffccc7;
    border-radius: 8px;
    color: #ff4d4f;
    font-size: 13px;
}

/* ========== AI 声明按钮 ========== */
.ai-label-wrap {
    position: fixed;
    right: 14px;
    top: calc(55% + 60px);
    display: flex;
    align-items: center;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px) scale(.9);
    transition: opacity .35s ease, transform .35s cubic-bezier(.22, 1, .36, 1);
    pointer-events: none;
}
.ai-label-wrap.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.ai-label-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    flex-shrink: 0;
    transition: all .35s cubic-bezier(.22, 1, .36, 1);
}
.ai-label-btn:hover {
    border-color: #ccc;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09);
}
.ai-label-text {
    font-size: 11px;
    font-weight: 700;
    color: #999;
    letter-spacing: 0.8px;
    transition: color .3s ease;
}
.ai-label-btn:hover .ai-label-text {
    color: #666;
}
.ai-label-popup {
    position: absolute;
    right: 56px;
    top: 50%;
    transform: translateY(-50%) translateX(12px);
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 8px 14px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .08);
    white-space: nowrap;
    font-size: 12px;
    color: #777;
    letter-spacing: 0.2px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all .3s cubic-bezier(.22, 1, .36, 1);
    display: flex;
    align-items: center;
    gap: 6px;
}
.ai-label-popup.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
    pointer-events: auto;
}
.ai-label-popup::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    margin-top: -4px;
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-right: 1px solid #e5e5e5;
    border-top: 1px solid #e5e5e5;
    transform: rotate(45deg);
}
.ai-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ai-color);
    box-shadow: 0 0 0 2px var(--ai-color-rgba-25);
    flex-shrink: 0;
    animation: ai-dot-blink 2s ease-in-out infinite;
}
@keyframes ai-dot-blink {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 2px var(--ai-color-rgba-25), 0 0 8px var(--ai-color-rgba-40);
    }
    50% {
        opacity: 0.35;
        box-shadow: 0 0 0 2px var(--ai-color-rgba-08), 0 0 2px var(--ai-color-rgba-10);
    }
}

/* ========== 黑夜模式 ========== */
html.dark .footer-logo-text { color: #f0f0f0 !important; }
html.dark .footer-logo-icon rect { fill: #f0f0f0; }
html.dark .footer-logo-icon path { stroke: #111; }
html.dark .footer-desc { color: #555 !important; }
html.dark .footer-links h4 { color: #f0f0f0 !important; }
html.dark .footer-links a { color: #777 !important; }
html.dark .footer-links a:hover { color: #f0f0f0 !important; }
html.dark .footer-copyright { color: #444 !important; }
html.dark .footer-copyright a { color: #666 !important; }
html.dark .footer-copyright a:hover { color: #f0f0f0 !important; }
html.dark .footer-icp { color: #333 !important; }
html.dark .social-link { color: #777 !important; border-color: #222; background: #151515; }
html.dark .social-link:hover { color: #f0f0f0 !important; border-color: #333; background: #1a1a1a; }
html.dark .back-to-top { color: #777 !important; border-color: #333 !important; background: #1c1c1c !important; box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important; }
html.dark .back-to-top:hover { color: #aaa !important; border-color: #555 !important; transform: translateY(0) scale(1); box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important; }
html.dark .site-footer { border: none !important; }
html.dark .footer-bottom { border: none !important; }
html.dark .footer-bottom::before,
html.dark .footer-bottom::after { display: none !important; content: none !important; }
html.dark .footer-divider { background: linear-gradient(90deg, transparent, #222, transparent); }
html.dark .footer-rss { background: #151515; border-color: #222; }
html.dark .footer-rss:hover { background: #1a1a1a; border-color: #333; }
html.dark .footer-rss:hover span { color: #f0f0f0; }

/* Tooltip & QR Popup 黑夜模式 */
html.dark .btn-tooltip {
    background: #1c1c1c;
    border-color: #333;
    color: #888;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .4);
}
html.dark .btn-tooltip::after {
    background: #1c1c1c;
    border-right-color: #333;
    border-top-color: #333;
}
html.dark .qr-popup {
    background: #1c1c1c;
    border-color: #333;
    box-shadow: 0 8px 32px rgba(0,0,0,.4);
}
html.dark .qr-popup::after {
    background: #1c1c1c;
    border-right-color: #333;
    border-top-color: #333;
}
html.dark .qr-img-wrap {
    background: #fff;
}
html.dark .qr-card-name { color: #ddd; }
html.dark .qr-card-desc { color: #888; }

/* 扫码按钮黑夜模式 —— 与反馈/回顶/AI 按钮完全统一 */
html.dark .qr-btn {
    color: #777 !important;
    border-color: #333 !important;
    background: #1c1c1c !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}
html.dark .qr-btn:hover {
    color: #aaa !important;
    border-color: #555 !important;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}

/* 反馈弹窗黑夜模式 */
html.dark .feedback-btn {
    color: #777 !important;
    border-color: #333 !important;
    background: #1c1c1c !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}
html.dark .feedback-btn:hover {
    color: #aaa !important;
    border-color: #555 !important;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}
html.dark .feedback-modal {
    background: #1c1c1c;
    box-shadow: 0 25px 70px rgba(0,0,0,0.4), 0 10px 25px rgba(0,0,0,0.3);
}
html.dark .feedback-modal-header {
    border-bottom-color: #2a2a2a;
}
html.dark .feedback-modal-header h3 {
    color: #f0f0f0;
}
html.dark .feedback-modal-close {
    color: #777;
}
html.dark .feedback-modal-close:hover {
    background: #2a2a2a;
    color: #f0f0f0;
}
html.dark .feedback-desc {
    color: #888;
}
html.dark .feedback-textarea,
html.dark .feedback-input {
    background: #1a1a1a;
    border-color: #333;
    color: #f0f0f0;
}
html.dark .feedback-textarea:focus,
html.dark .feedback-input:focus {
    border-color: #555;
    background: #1a1a1a;
}
html.dark .feedback-hint {
    color: #555;
}
html.dark .feedback-btn-cancel {
    background: #1c1c1c;
    border-color: #333;
    color: #888;
}
html.dark .feedback-btn-cancel:hover {
    border-color: #555;
    color: #f0f0f0;
}
html.dark .feedback-btn-submit {
    background: #f0f0f0;
    color: #111;
}
html.dark .feedback-success {
    color: #4ade80;
}
html.dark .feedback-error {
    background: #2a1515;
    border-color: #5a2a2a;
    color: #ff7875;
}

/* AI 按钮黑夜模式 */
html.dark .ai-label-btn {
    background: #1c1c1c !important;
    border-color: #333 !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}
html.dark .ai-label-btn:hover {
    border-color: #333 !important;
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .4), 0 10px 26px rgba(0, 0, 0, .45) !important;
}
html.dark .ai-label-text {
    color: #666;
}
html.dark .ai-label-btn:hover .ai-label-text {
    color: #999;
}
html.dark .ai-label-popup {
    background: #1c1c1c;
    border-color: #333;
    color: #888;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .4);
}
html.dark .ai-label-popup::after {
    background: #1c1c1c;
    border-right-color: #333;
    border-top-color: #333;
}
html.dark .ai-dot {
    background: var(--ai-color);
    filter: brightness(1.25);
    box-shadow: 0 0 0 2px var(--ai-color-rgba-25);
    animation-name: ai-dot-blink-dark;
}
@keyframes ai-dot-blink-dark {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 2px var(--ai-color-rgba-25), 0 0 10px var(--ai-color-rgba-50);
    }
    50% {
        opacity: 0.3;
        box-shadow: 0 0 0 2px var(--ai-color-rgba-08), 0 0 2px var(--ai-color-rgba-10);
    }
}

/* ========== 移动端适配 ========== */
@media (max-width: 640px) {
    .qr-btn { display: flex; right: 8px; top: auto; bottom: 260px; width: 44px; height: 44px; box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09); }
    .feedback-btn { right: 8px; top: auto; bottom: 200px; width: 44px; height: 44px; box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09); }
    .back-to-top { right: 8px; top: auto; bottom: 80px; width: 44px; height: 44px; box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09); }
    .ai-label-wrap { right: 8px; top: auto; bottom: 140px; }
    .ai-label-btn { width: 44px; height: 44px; box-shadow: 0 2px 8px rgba(0, 0, 0, .07), 0 10px 26px rgba(0, 0, 0, .09); }
    .ai-label-popup { right: 52px; font-size: 11px; padding: 6px 10px; }
    .ai-label-popup .ai-dot { width: 6px; height: 6px; }
    .btn-tooltip { right: 52px; font-size: 11px; padding: 6px 10px; }
    .qr-popup { right: 52px; width: calc(100vw - 80px); max-width: 260px; padding: 14px; }
    .qr-popup-body { max-height: 60vh; }
    .qr-img-wrap { width: 100%; height: auto; aspect-ratio: 1; }
    .qr-img-wrap img { max-width: 100%; max-height: 100%; }
    .feedback-modal-overlay { padding: 0; align-items: flex-end; }
    .feedback-modal { width: 100%; max-height: 85vh; border-radius: 16px 16px 0 0; transform: translateY(100%); }
    .feedback-modal-overlay.show .feedback-modal { transform: translateY(0); }
    .feedback-modal-header { border-radius: 16px 16px 0 0; }
    .footer-inner { grid-template-columns: 1fr; gap: 48px; }
    .footer-nav-grid { gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 12px; }
    .footer-rss { margin: 0 auto; }
    .footer-logo-text { font-size: 18px; }
}
@media (max-width: 992px) {
    .footer-inner { grid-template-columns: 1fr; gap: 48px; }
    .footer-nav-grid { gap: 32px; }
}