/* ==================== 变量 ==================== */
:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #222222;
    --bg-card: #2a2a2a;
    --bg-hover: #333333;
    --bg-dark: #151515;
    --accent: #b8956a;
    --accent-dark: #8b6914;
    --accent-light: #d4b896;
    --border: #3a3a3a;
    --border-light: #4a4a4a;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --font-heading: 'Oswald', 'Arial Narrow', sans-serif;
    --font-body: 'Inter', 'Segoe UI', sans-serif;
    --transition: 0.3s ease;
    --radius: 8px;
    --radius-sm: 4px;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 35px rgba(184,149,106,0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--accent);
    color: #1a1a1a;
    border-color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

.center-btn {
    text-align: center;
    margin-top: 40px;
}

/* ==================== 顶部导航 ==================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(26,26,26,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 2px;
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 3px;
}

.logo-sub {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.nav-link.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* ==================== Hero区域 ==================== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 30%, #1a1a1a 60%, #1f1f1f 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(184,149,106,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139,105,20,0.06) 0%, transparent 50%),
        repeating-linear-gradient(45deg, rgba(255,255,255,0.01) 0px, rgba(255,255,255,0.01) 1px, transparent 1px, transparent 20px);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 850px;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: 14px;
    letter-spacing: 6px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 56px;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: 2px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    display: block;
    letter-spacing: 2px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ==================== 区块通用 ==================== */
.section {
    padding: 80px 0;
}

.section-dark {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.text-left {
    text-align: left;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 50px;
}

/* ==================== 产品卡片 ==================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-dark);
    box-shadow: var(--shadow-hover);
}

.product-img {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: var(--bg-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-img-placeholder {
    font-family: var(--font-heading);
    font-size: 40px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.product-info {
    padding: 20px;
}

.product-category {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 6px;
    font-weight: 500;
}

.product-name {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.product-brand {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.product-link {
    color: var(--accent);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.product-link:hover {
    color: var(--accent-light);
}

/* ==================== 品牌Logo墙 ==================== */
.brand-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.brand-item {
    padding: 18px 28px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-secondary);
    transition: var(--transition);
    text-transform: uppercase;
}

.brand-item:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

/* ==================== 分类网格 ==================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.category-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.category-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.category-name {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.category-count {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ==================== OEM区块 ==================== */
.oem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.oem-text {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

.oem-list {
    margin-bottom: 28px;
}

.oem-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.oem-list li::before {
    content: '▸';
    color: var(--accent);
}

.oem-placeholder {
    aspect-ratio: 4/3;
    background-color: var(--bg-hover);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    letter-spacing: 1px;
}

/* ==================== 联系表单 ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--text-muted);
    font-size: 14px;
}

.contact-form {
    background-color: var(--bg-card);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: var(--transition);
    margin-bottom: 16px;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(184,149,106,0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* ==================== 页头 ==================== */
.page-header {
    background: linear-gradient(135deg, #1a1a1a 0%, #252525 50%, #1a1a1a 100%);
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.page-header p {
    color: var(--text-muted);
    font-size: 16px;
}

/* ==================== 筛选栏 ==================== */
.filter-section {
    padding: 30px 0 0;
}

.filter-bar {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    flex: 1;
    min-width: 250px;
    display: flex;
    align-items: center;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 14px;
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--accent);
}

.search-box input {
    flex: 1;
    padding: 12px 10px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-body);
}

.search-box input:focus {
    outline: none;
}

.search-box button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
}

.search-box button:hover {
    color: var(--accent);
}

.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-group select {
    padding: 12px 14px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    cursor: pointer;
    min-width: 140px;
    transition: var(--transition);
}

.filter-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.result-count {
    margin-top: 16px;
    color: var(--text-muted);
    font-size: 13px;
}

.no-results {
    text-align: center;
    padding: 60px 0;
    color: var(--text-muted);
    font-size: 16px;
}

/* ==================== 分页 ==================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.page-btn {
    padding: 10px 16px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 14px;
    transition: var(--transition);
    min-width: 42px;
    text-align: center;
}

.page-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.page-btn.active {
    background-color: var(--accent);
    color: #1a1a1a;
    border-color: var(--accent);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ==================== 产品详情 ==================== */
.product-detail-section {
    padding-top: 50px;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.product-detail-img {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow: visible;
    padding: 0;
}

.product-detail-img #detailMainImage {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: 8px;
}
.product-detail-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail-info h1 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
    line-height: 1.3;
}

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

.detail-tag {
    padding: 6px 14px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.detail-tag.accent {
    border-color: var(--accent-dark);
    color: var(--accent);
}

.detail-desc {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 15px;
    line-height: 1.8;
}

.detail-specs {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 28px;
}

.detail-specs h3 {
    font-family: var(--font-heading);
    font-size: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 14px;
    color: var(--accent);
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-key {
    color: var(--text-muted);
}

.spec-value {
    color: var(--text-primary);
    font-weight: 500;
}

.detail-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ==================== 询盘弹窗 ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h3 {
    font-family: var(--font-heading);
    font-size: 22px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.modal .close-btn {
    float: right;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
}

.modal .close-btn:hover {
    color: var(--text-primary);
}

/* ==================== 关于页面 ==================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

.about-image {
    aspect-ratio: 1/1;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}

.advantage-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.advantage-card:hover {
    border-color: var(--accent-dark);
    transform: translateY(-4px);
}

.advantage-icon {
    font-size: 36px;
    margin-bottom: 14px;
}

.advantage-card h3 {
    font-family: var(--font-heading);
    font-size: 17px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.advantage-card p {
    color: var(--text-muted);
    font-size: 14px;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.process-step {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    position: relative;
}

.process-num {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-dark);
    display: block;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.process-step h3 {
    font-family: var(--font-heading);
    font-size: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.process-step p {
    color: var(--text-muted);
    font-size: 13px;
}

/* ==================== 底部 ==================== */
.footer {
    background-color: var(--bg-dark);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.footer-col p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 8px;
    line-height: 1.6;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    font-size: 13px;
    padding: 4px 0;
    transition: var(--transition);
}

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

.footer-col details {
    margin-bottom: 8px;
}

.footer-col summary {
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    padding: 4px 0;
    font-weight: 500;
}

.footer-col summary:hover {
    color: var(--accent);
}

.footer-col details p {
    padding-left: 14px;
    margin-top: 4px;
}

.cert-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.cert-badge {
    padding: 4px 12px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--accent);
    text-transform: uppercase;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 1px;
}

/* ==================== WhatsApp浮动按钮 ==================== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background-color: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37,211,102,0.4);
    z-index: 150;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37,211,102,0.6);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }

    .oem-grid,
    .contact-grid,
    .about-grid,
    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .oem-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

    .nav.active {
        display: flex;
    }

    .header-actions {
        display: none;
    }

    .hero {
        min-height: 70vh;
    }

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

    .hero-desc {
        font-size: 15px;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-num {
        font-size: 30px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
    }

    .search-box {
        width: 100%;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .hero-btns {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }
}
/* ========== 缩略图尺寸 ========== */
.detail-thumb {
    width: 48px !important;
    height: 48px !important;
    flex-shrink: 0;
}

.detail-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}