/* Modern Template - Apple Store Style */

:root {
    --apple-black: #1d1d1f;
    --apple-gray: #86868b;
    --apple-light-gray: #f5f5f7;
    --apple-blue: #0071e3;
    --apple-blue-hover: #0077ed;
    --apple-green: #34c759;
    --apple-orange: #ff9500;
    --apple-red: #ff3b30;
    --apple-white: #ffffff;
    --apple-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    --apple-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    color: var(--apple-black);
    background: var(--apple-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Apple 风格导航栏 ===== */
.modern-navbar {
    background: rgba(0, 0, 0, 0.8) !important;
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1) !important;
    padding: 0;
    min-height: 44px;
}

.modern-navbar .navbar-brand {
    font-size: 21px;
    font-weight: 600;
    color: var(--apple-white) !important;
    letter-spacing: -0.03em;
}

.modern-navbar .nav-link {
    color: #f5f5f7 !important;
    font-size: 12px;
    font-weight: 400;
    padding: 0 8px !important;
    opacity: 0.8;
    transition: opacity 0.3s ease;
    letter-spacing: -0.01em;
}

.modern-navbar .nav-link:hover {
    opacity: 1;
}

.modern-navbar .nav-link.active {
    opacity: 1;
    color: var(--apple-white) !important;
}

.modern-navbar .navbar-toggler {
    border: none;
    padding: 0;
}

.modern-navbar .navbar-toggler-icon {
    filter: invert(1);
}

/* ===== 主内容区域 ===== */
.main-content {
    padding: 0;
    min-height: calc(100vh - 44px);
}

/* ===== 公告区域 - Apple 风格横幅 ===== */
.notice-section {
    margin-bottom: 0;
}

.notice-card {
    background: var(--apple-light-gray);
    color: var(--apple-black);
    padding: 40px 20px;
    text-align: center;
}

.notice-card h4 {
    font-size: 40px;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-bottom: 10px;
    line-height: 1.1;
}

.notice-card p {
    font-size: 21px;
    line-height: 1.381;
    font-weight: 400;
    letter-spacing: 0.004em;
    color: var(--apple-gray);
}

/* ===== 分类区域 ===== */
.category-section {
    padding: 50px 20px;
    text-align: center;
}

.category-title {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.07143;
    margin-bottom: 10px;
}

.category-subtitle {
    font-size: 28px;
    line-height: 1.10722;
    font-weight: 400;
    letter-spacing: 0.004em;
    color: var(--apple-gray);
    margin-bottom: 40px;
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}

.category-tab {
    padding: 12px 24px;
    background: var(--apple-white);
    border: 1px solid #d2d2d7;
    border-radius: 980px;
    color: var(--apple-blue);
    font-size: 17px;
    font-weight: 400;
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-tab:hover {
    background: var(--apple-blue);
    color: var(--apple-white);
    border-color: var(--apple-blue);
}

.category-tab.active {
    background: var(--apple-black);
    color: var(--apple-white);
    border-color: var(--apple-black);
}

/* ===== 商品区域 ===== */
.goods-section {
    padding: 0;
}

.goods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
    padding: 12px;
}

.goods-card {
    background: var(--apple-white);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--apple-shadow);
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    position: relative;
}

.goods-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--apple-shadow-hover);
}

.goods-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.goods-badge.auto {
    background: var(--apple-green);
    color: var(--apple-white);
}

.goods-badge.manual {
    background: var(--apple-orange);
    color: var(--apple-white);
}

.goods-image-wrapper {
    position: relative;
    background: var(--apple-light-gray);
    aspect-ratio: 16/10;
    overflow: hidden;
}

.goods-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.goods-card:hover .goods-image {
    transform: scale(1.05);
}

.goods-body {
    padding: 24px;
}

.goods-title {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.009em;
    margin-bottom: 8px;
    line-height: 1.08349;
    color: var(--apple-black);
}

.goods-price {
    font-size: 17px;
    color: var(--apple-gray);
    font-weight: 400;
    margin-bottom: 12px;
}

.goods-price strong {
    color: var(--apple-black);
    font-weight: 600;
}

.goods-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.goods-discount {
    font-size: 12px;
    color: var(--apple-orange);
    font-weight: 600;
}

.goods-stock {
    font-size: 14px;
    color: var(--apple-gray);
    margin-bottom: 16px;
}

.goods-btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--apple-blue);
    color: var(--apple-white);
    border: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
}

.goods-btn:hover {
    background: var(--apple-blue-hover);
}

/* ===== 商品详情页 ===== */
.product-detail {
    background: var(--apple-white);
    max-width: 1200px;
    margin: 0 auto;
}

.product-image-wrapper {
    padding: 60px 40px;
    background: var(--apple-white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image {
    max-width: 100%;
    height: auto;
    border-radius: 18px;
}

.product-info {
    padding: 60px 40px;
}

.product-title {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.07143;
    margin-bottom: 20px;
}

.product-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.product-tag {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.product-tag.stock {
    background: rgba(52, 199, 89, 0.1);
    color: var(--apple-green);
}

.product-tag.limit {
    background: rgba(255, 59, 48, 0.1);
    color: var(--apple-red);
}

.product-wholesale {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 24px 0;
}

.wholesale-tag {
    padding: 8px 16px;
    background: var(--apple-black);
    color: var(--apple-white);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.product-price {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -0.003em;
    margin: 32px 0;
}

/* ===== 表单样式 ===== */
.buy-form {
    margin-top: 40px;
}

.form-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--apple-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.form-control {
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    padding: 16px;
    font-size: 17px;
    transition: all 0.3s ease;
    background: var(--apple-white);
}

.form-control:focus {
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
    outline: none;
}

.payment-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.payment-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 17px;
}

.payment-option:hover,
.payment-option.active {
    border-color: var(--apple-blue);
    background: rgba(0, 113, 227, 0.05);
}

.submit-btn {
    width: 100%;
    padding: 18px 32px;
    background: var(--apple-blue);
    color: var(--apple-white);
    border: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    transition: all 0.3s ease;
    margin-top: 24px;
}

.submit-btn:hover {
    background: var(--apple-blue-hover);
}

/* ===== 描述卡片 ===== */
.description-card {
    background: var(--apple-white);
    border-radius: 18px;
    margin-top: 40px;
    overflow: hidden;
}

.description-card .card-header {
    background: var(--apple-light-gray);
    border-bottom: 1px solid #d2d2d7;
    padding: 24px;
}

.description-card .card-header h5 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.004em;
    margin: 0;
}

.description-card .card-body {
    padding: 40px;
    font-size: 17px;
    line-height: 1.47059;
}

/* ===== 页脚 ===== */
.modern-footer {
    background: var(--apple-light-gray);
    color: var(--apple-gray);
    padding: 40px 20px;
    margin-top: 60px;
    border-top: 1px solid #d2d2d7;
}

.footer-brand a {
    color: var(--apple-black);
    text-decoration: none;
    font-size: 12px;
    font-weight: 400;
}

.footer-custom {
    margin-top: 12px;
    font-size: 12px;
}

.footer-copyright {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #d2d2d7;
    font-size: 12px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .goods-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 10px;
        padding: 10px;
    }

    .goods-image-wrapper {
        aspect-ratio: 1/1;
    }

    .goods-body {
        padding: 16px;
    }

    .goods-title {
        font-size: 17px;
    }

    .goods-price {
        font-size: 14px;
    }

    .goods-btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .product-title {
        font-size: 32px;
    }

    .product-price {
        font-size: 32px;
    }

    .product-image-wrapper {
        padding: 40px 20px;
    }

    .product-info {
        padding: 40px 20px;
    }

    .category-title {
        font-size: 32px;
    }

    .category-subtitle {
        font-size: 21px;
    }

    .category-tabs {
        gap: 10px;
    }

    .category-tab {
        padding: 10px 16px;
        font-size: 14px;
    }

    .notice-card h4 {
        font-size: 28px;
    }

    .notice-card p {
        font-size: 17px;
    }
}

@media (max-width: 576px) {
    .goods-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        padding: 8px;
    }

    .goods-image-wrapper {
        aspect-ratio: 1/1;
    }

    .goods-body {
        padding: 12px;
    }

    .goods-title {
        font-size: 14px;
    }

    .goods-price {
        font-size: 12px;
    }

    .goods-btn {
        padding: 8px 16px;
        font-size: 12px;
    }

    .product-title {
        font-size: 24px;
    }

    .product-price {
        font-size: 24px;
    }

    .category-title {
        font-size: 24px;
    }

    .category-subtitle {
        font-size: 17px;
    }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* ===== 动画效果 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===== 工具类 ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--apple-blue), var(--apple-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: var(--apple-shadow);
}

.border-custom {
    border: 1px solid #d2d2d7;
}

.rounded-custom {
    border-radius: 18px;
}