.red-stock {
    background: #f22626 !important;
    color: #f5f1f1 !important;
    border: 1px solid #f4ecec !important;
}
/* ===== 通用重置與字體 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/* ===== 背景圖由 HTML 設定，此處僅保留遮罩 ===== */
body {
    color: #fff;
    font-size: 14px;
    padding-bottom: 150px;
    overflow-x: hidden;
    margin: 0;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    position: relative;
}

/* 半透明黑色遮罩（提升文字可讀性） */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: -1;
}

/* 頂部導航 */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: rgba(36, 36, 36, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 999;
    gap: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.logo {
    font-size: 18px;
    font-weight: bold;
    color: #ff8c00;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo i {
    font-size: 20px;
}
.menu-btn {
    font-size: 18px;
    cursor: pointer;
    width: 30px;
}
.nav-actions {
    display: flex;
    gap: 8px;
}
.nav-btn {
    padding: 6px 10px;
    border: 1px solid #ff8c00;
    border-radius: 4px;
    color: #ff8c00;
    text-decoration: none;
    font-size: 12px;
    white-space: nowrap;
    transition: all 0.3s;
    background: transparent;
}
.nav-btn:hover {
    background: #ff8c00;
    color: #fff;
}

/* 玻璃態側邊導航 */
.sidebar {
    position: fixed;
    left: -280px;
    top: 0;
    width: 280px;
    height: 100vh;
    z-index: 1000;
    background: rgba(24, 24, 24, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding-top: 70px;
    transition: left 0.3s ease;
    text-align: left;
    border-right: 1px solid rgba(255, 140, 0, 0.2);
    box-shadow: 3px 0 8px rgba(0, 0, 0, 0.2);
}
.sidebar.active {
    left: 0;
}
.sidebar .nav-group {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 140, 0, 0.1);
}
.sidebar .nav-group-title {
    padding: 8px 20px;
    font-size: 12px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.sidebar a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #f5f5f5;
    text-decoration: none;
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
    gap: 12px;
}
.sidebar a i {
    font-size: 16px;
    width: 20px;
    text-align: center;
    color: #ff8c00;
}
.sidebar a:hover {
    background: rgba(255, 140, 0, 0.15);
    border-left-color: #ff8c00;
    color: #fff;
}
.sidebar a.active {
    background: rgba(255, 140, 0, 0.2);
    border-left-color: #ff8c00;
    font-weight: 500;
}

/* 產品詳情核心區域 */
.product-detail {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
}

.back-links {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(51, 51, 51, 0.6);
    color: #ff8c00;
    text-decoration: none;
    border-radius: 30px;
    font-size: 13px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 140, 0, 0.3);
}
.back-link:hover {
    background: rgba(255, 140, 0, 0.15);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
.back-link i {
    font-size: 12px;
}

.product-name {
    font-size: 28px;
    font-weight: 700;
    margin: 15px 0 25px;
    color: #fff;
    text-align: center;
    background: linear-gradient(90deg, #ff8c00, #ff6700, #ff4d4d);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% auto;
    animation: gradientShift 3s ease infinite;
    position: relative;
}
.product-name i {
    margin-right: 10px;
    font-size: 24px;
    color: #ff8c00;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.product-info {
    background: rgba(36, 36, 36, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    padding: 20px;
    border: 1px solid rgba(255, 140, 0, 0.2);
}

.back-home-btn {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, #ff8c00 0%, #ff6700 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    margin-top: 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}
.back-home-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.3);
}

.spec-section {
    margin-bottom: 20px;
}
.spec-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 12px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
}
.spec-title i {
    color: #ff8c00;
    font-size: 18px;
}
.price-list-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.price-item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(45, 45, 45, 0.7);
    border-radius: 8px;
    padding: 12px 15px;
    border: 1px solid #333;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    position: relative;
    min-height: 60px;
}
.price-item-row.selected {
    border-color: #ff8c00;
    background: rgba(255, 140, 0, 0.15);
}
.price-item-row.selected::before {
    content: "✓";
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #4caf50;
    font-weight: bold;
    font-size: 16px;
}
.price-item-row:hover {
    border-color: #ff8c00;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}
.price-item-name {
    flex: 1;
    font-size: 15px;
    font-weight: 500;
    padding-left: 25px;
}
.price-item-prices {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 2;
    justify-content: flex-end;
}
.price-item-original {
    color: #999;
    text-decoration: line-through;
    font-size: 14px;
    min-width: 80px;
    text-align: right;
}
.price-item-discount {
    color: #ff6700;
    font-size: 16px;
    font-weight: bold;
    font-family: 'Arial Black', sans-serif;
    min-width: 80px;
    text-align: right;
}
.price-item-discount-tag {
    background: #4caf50;
    color: #fff;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    min-width: 70px;
    text-align: center;
}
.price-item-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 120px;
}
.price-item-stock {
    background: #4caf50;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 3px 8px;
    font-weight: 500;
    font-size: 12px;
    min-width: 50px;
    text-align: center;
}
.price-item-qty {
    display: flex;
    align-items: center;
    background: #333;
    border-radius: 4px;
    overflow: hidden;
}
.price-item-qty-btn {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #444;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 12px;
}
.price-item-qty-input {
    width: 35px;
    height: 22px;
    background: #333;
    border: none;
    color: #fff;
    text-align: center;
    font-size: 16px !important;
    outline: none;
    padding: 0;
    line-height: 1;
    -moz-appearance: textfield;
    -webkit-appearance: none;
}
.price-item-qty-input::-webkit-outer-spin-button,
.price-item-qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.product-attr {
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
    padding: 15px 0;
    margin-bottom: 20px;
}
.attr-item {
    display: flex;
    margin-bottom: 10px;
}
.attr-label {
    width: 100px;
    color: #999;
}
.attr-value {
    flex: 1;
    color: #fff;
}

.notice-section {
    background: rgba(255, 77, 77, 0.1);
    border: 1px solid rgba(255, 77, 77, 0.2);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
}
.notice-title {
    font-size: 16px;
    font-weight: bold;
    color: #ff4d4d;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.notice-list {
    list-style: disc;
    padding-left: 20px;
    color: #ccc;
    line-height: 1.6;
}
.notice-list li {
    margin-bottom: 5px;
}
.notice-list li strong {
    color: #ff8c00;
}

.contact-section {
    background: rgba(33, 150, 243, 0.1);
    border: 1px solid rgba(33, 150, 243, 0.2);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
}
.contact-title {
    font-size: 16px;
    font-weight: bold;
    color: #2196f3;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.contact-qr-group {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 15px;
}
.contact-qr-item {
    text-align: center;
}
.contact-qr {
    padding: 10px;
    background: #fff;
    border-radius: 6px;
    display: inline-block;
    margin-bottom: 8px;
}
.contact-qr img {
    width: 120px;
    height: 120px;
    display: block;
    background: #eee;
}
.contact-qr-name {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.contact-qr-name i {
    color: #2196f3;
}
.contact-desc {
    font-size: 12px;
    color: #ccc;
    line-height: 1.6;
}
.contact-desc strong {
    color: #ff8c00;
}

#floating-cart {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    background: rgba(36, 36, 36, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    padding: 12px 15px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 140, 0, 0.3);
    z-index: 997;
    display: none;
    animation: slideUp 0.4s ease;
}
@keyframes slideUp {
    from { bottom: 60px; opacity: 0; }
    to { bottom: 80px; opacity: 1; }
}
#floating-cart.show {
    display: block;
}
.floating-cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.floating-cart-title {
    font-size: 14px;
    font-weight: bold;
    color: #ff8c00;
}
.floating-total {
    font-size: 18px;
    font-weight: bold;
    color: #4caf50;
}
.floating-items {
    max-height: 100px;
    overflow-y: auto;
    font-size: 12px;
    color: #ddd;
}
.floating-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid #333;
}
.floating-item:last-child {
    border-bottom: none;
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(36, 36, 36, 0.9);
    padding: 15px 0;
    text-align: center;
    border-top: 2px solid #ff8c00;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.3);
    z-index: 998;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.footer-text {
    color: #ccc;
    font-size: 12px;
    line-height: 1.5;
}
.footer-text span {
    color: #ff8c00;
    font-weight: bold;
}
.footer-desc {
    color: #999;
    font-size: 10px;
}

/* ===== 特殊區塊樣式 ===== */
.meihua-attr {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 24px 0 18px 0;
}
.meihua-attr-item {
    background: rgba(255,140,0,0.12);
    border-radius: 16px;
    padding: 18px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    min-width: 120px;
}
.meihua-attr-item i {
    font-size: 2rem;
    color: #ff8c00;
    margin-bottom: 8px;
}
.meihua-attr-label {
    font-size: 1.1rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 2px;
}

.contact-section-beauty {
    background: rgba(33,150,243,0.13);
    border-radius: 10px;
    padding: 22px 12px 18px 12px;
    margin-bottom: 20px;
    border: 1px solid rgba(33,150,243,0.18);
}
.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    margin-bottom: 18px;
}
.contact-list-group {
    min-width: 180px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.contact-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.08rem;
    color: #2196f3;
    background: rgba(255,255,255,0.07);
    border-radius: 8px;
    padding: 8px 14px;
    font-weight: 500;
}
.contact-list-item i {
    font-size: 1.3em;
    color: #2196f3;
}
.contact-list-item .contact-label {
    color: #2196f3;
    font-weight: bold;
    margin-right: 4px;
}
.contact-list-item .contact-value {
    color: #fff;
    font-weight: 500;
}
.contact-section-beauty .contact-desc {
    color: #b3e0ff;
    font-size: 13px;
    margin-bottom: 0;
}
.contact-section-beauty .contact-desc strong {
    color: #ff8c00;
}

.contact-list-ys {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    justify-content: center;
    margin-bottom: 18px;
}
.contact-main-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(33,150,243,0.10);
    border-radius: 12px;
    padding: 16px 28px;
    font-size: 1.18rem;
    color: #2196f3;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    min-width: 210px;
    transition: box-shadow 0.2s;
}
.contact-main-item i {
    font-size: 2.1em;
    color: #25d366;
    margin-right: 6px;
}
.contact-main-item .fa-weixin {
    color: #7bb32e;
}
.contact-main-item .fa-line {
    color: #00c300;
}
.contact-main-label {
    color: #2196f3;
    font-weight: bold;
    margin-right: 4px;
    font-size: 1.08em;
}
.contact-main-value {
    color: #fff;
    font-weight: 600;
    font-size: 1.08em;
    text-decoration: none;
    transition: color 0.2s;
}
.contact-main-value:hover {
    color: #ff8c00;
    text-decoration: underline;
}

/* ===== 響應式設計 ===== */
@media (max-width: 600px) {
    .meihua-attr {
        flex-direction: column;
        gap: 16px;
    }
    .meihua-attr-item {
        min-width: 0;
        width: 100%;
    }
    .contact-list {
        flex-direction: column;
        gap: 18px;
    }
    .contact-list-group {
        min-width: 0;
    }
    .contact-list-ys {
        flex-direction: column;
        gap: 16px;
    }
    .contact-main-item {
        min-width: 0;
        width: 100%;
        justify-content: flex-start;
    }
}
.product-detail .faq-section {
    margin-top: 24px;
    padding: 22px 18px;
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255, 140, 0, 0.08), rgba(255, 255, 255, 0.03));
    border: 1px solid rgba(255, 140, 0, 0.28);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
}
.product-detail .faq-section #faq-title {
    font-size: 1.32rem;
    color: #ff9800;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.product-detail .faq-list {
    display: grid;
    gap: 12px;
}
.product-detail .faq-item {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-left: 3px solid #ff9800;
    border-radius: 10px;
    padding: 14px 14px 12px;
    transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}
.product-detail .faq-item:hover {
    transform: translateY(-1px);
    background: rgba(0, 0, 0, 0.48);
    border-color: rgba(255, 140, 0, 0.55);
}
.product-detail .faq-question {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: #ffffff;
    line-height: 1.5;
    font-size: 1.02rem;
    margin-bottom: 7px;
}
.product-detail .faq-question i {
    color: #ff9800;
    margin-top: 3px;
    flex-shrink: 0;
}
.product-detail .faq-item p {
    margin: 0;
    color: #e0e0e0;
    line-height: 1.75;
    padding-left: 24px;
    font-size: 0.96rem;
}
@media (max-width: 768px) {
    .product-detail .faq-section {
        padding: 18px 14px;
    }
    .product-detail .faq-section #faq-title {
        font-size: 1.16rem;
    }
    .product-detail .faq-item {
        padding: 12px;
    }
    .product-detail .faq-item p {
        padding-left: 22px;
    }
}

.top-nav .nav-btn {
    font-size: 13px;
    padding: 7px 12px;
}
.product-detail {
    font-size: 15px;
}
.product-detail .back-link {
    font-size: 14px;
}
.product-detail .price-item-name {
    font-size: 16px;
}
.product-detail .price-item-discount-tag,
.product-detail .price-item-stock,
.product-detail .price-item-qty-btn {
    font-size: 13px;
}
.product-detail .notice-list li {
    font-size: 15px;
    line-height: 1.75;
    margin-bottom: 8px;
}
.product-detail .contact-desc ul,
.product-detail .contact-desc li,
.product-detail .contact-desc p {
    font-size: 15px;
    line-height: 1.75;
}
.product-detail .contact-section {
    margin-top: 10px;
}
#floating-cart .floating-cart-title {
    font-size: 15px;
}
#floating-cart .floating-items {
    font-size: 13px;
}
.footer .footer-text {
    font-size: 13px;
}
.footer .footer-desc {
    font-size: 12px;
    line-height: 1.55;
}
@media (max-width: 768px) {
    .product-detail {
        font-size: 14px;
    }
    .product-detail .notice-list li,
    .product-detail .contact-desc ul,
    .product-detail .contact-desc li,
    .product-detail .contact-desc p {
        font-size: 14px;
    }
}


@media (max-width: 480px) {
    .price-item-row {
        flex-wrap: wrap;
        padding: 10px 12px;
        min-height: auto;
    }
    .price-item-name {
        width: 100%;
        padding-left: 20px;
        margin-bottom: 8px;
    }
    .price-item-prices {
        width: 100%;
        justify-content: space-between;
        gap: 8px;
        flex-wrap: wrap;
    }
    .price-item-original,
    .price-item-discount {
        min-width: 60px;
        font-size: 13px;
    }
    .price-item-discount-tag {
        min-width: 60px;
        padding: 2px 8px;
        font-size: 11px;
    }
    .price-item-actions {
        min-width: 100px;
    }
    #floating-cart {
        bottom: 75px;
        padding: 10px;
    }
    .floating-total {
        font-size: 16px;
    }
}