/* 基础样式重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 专业蓝 */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    
    /* 辅助色 */
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    
    /* 背景色 */
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-dark: #0f172a;
    
    /* 文字色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-white: #ffffff;
    
    /* 边框 */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* 状态色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* 品牌色 */
    --xilinx: #e21836;
    --ti: #cc0000;
    --st: #03234b;
    --adi: #0066b3;
    --intel: #0071c5;
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* 字体 */
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* 悬浮联系按钮 */
.floating-contact {
    position: fixed;
    right: 20px;
    bottom: 100px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.float-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    text-decoration: none;
}

.float-btn:hover {
    transform: scale(1.1);
}

.float-btn svg {
    width: 28px;
    height: 28px;
}

.float-btn.whatsapp {
    background: linear-gradient(135deg, #25D366, #128C7E);
}

.float-btn.telegram {
    background: linear-gradient(135deg, #0088cc, #005580);
}

.float-btn.email {
    background: linear-gradient(135deg, #EA4335, #c53929);
}

/* 顶部通知栏 */
.top-bar {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary));
    color: white;
    padding: 10px 0;
    font-size: 0.875rem;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 核心卖点横幅 */
.value-props-bar {
    background: var(--bg-dark);
    color: white;
    padding: 16px 0;
    position: fixed;
    top: 38px;
    left: 0;
    right: 0;
    z-index: 999;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.value-props-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.value-prop-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    white-space: nowrap;
}

.value-prop-item svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
    flex-shrink: 0;
}

.value-prop-divider {
    width: 1px;
    height: 20px;
    background: rgba(255,255,255,0.2);
}

@media (max-width: 768px) {
    .value-props-grid {
        gap: var(--space-sm);
    }
    
    .value-prop-item {
        font-size: 0.8125rem;
    }
    
    .value-prop-item svg {
        width: 16px;
        height: 16px;
    }
    
    .value-prop-divider {
        display: none;
    }
}

.top-bar a {
    color: white;
    text-decoration: none;
    font-weight: 500;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: none;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary);
}

/* 按钮样式 */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: var(--primary-dark);
}

/* Hero区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 150px;
    padding-bottom: var(--space-2xl);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.hero h1 .highlight {
    color: var(--primary);
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 应用领域标签 */
.hero-industries {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: var(--space-md);
}

.industry-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.05));
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid rgba(37, 99, 235, 0.2);
    transition: all 0.3s ease;
}

.industry-tag:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

@media (min-width: 1024px) {
    .hero-industries {
        justify-content: flex-start;
    }
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: center;
}

.hero-brands {
    display: none;
}

.brand-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.brand-item {
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    font-weight: 700;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.brand-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.brand-item.xilinx { border-color: var(--xilinx); color: var(--xilinx); }
.brand-item.ti { border-color: var(--ti); color: var(--ti); }
.brand-item.st { border-color: var(--st); color: var(--st); }
.brand-item.adi { border-color: var(--adi); color: var(--adi); }
.brand-item.intel { border-color: var(--intel); color: var(--intel); }

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 80% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* 信任标识 */
.trust-badges {
    background: white;
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--border);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.badge-item svg {
    width: 24px;
    height: 24px;
    color: var(--success);
    flex-shrink: 0;
}

/* 热门产品 */
.hot-products {
    padding: var(--space-3xl) 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-badge {
    display: inline-block;
    background: var(--success);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.product-brand-section {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.brand-header {
    padding: var(--space-md) var(--space-lg);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.brand-header span {
    font-size: 0.875rem;
    opacity: 0.9;
}

.brand-header.xilinx-bg { background: var(--xilinx); }
.brand-header.ti-bg { background: var(--ti); }
.brand-header.st-bg { background: var(--st); }
.brand-header.adi-bg { background: var(--adi); }
.brand-header.intel-bg { background: var(--intel); }

.products-table {
    padding: var(--space-sm);
}

.table-header {
    display: none;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-light);
    align-items: center;
}

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

.part-number {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--text-primary);
    grid-column: 1 / -1;
}

.part-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.stock-status {
    font-size: 0.8125rem;
    font-weight: 600;
}

.stock-status.available {
    color: var(--success);
}

.stock-status.limited {
    color: var(--warning);
}

.hot-cta {
    text-align: center;
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.hot-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 1.125rem;
}

/* 品牌展示 */
.brands {
    padding: var(--space-3xl) 0;
    background: white;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.brand-card {
    background: var(--bg-light);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    transition: all 0.3s ease;
}

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

.brand-card .brand-name {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--space-xs);
}

.brand-card .brand-tag {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.brand-card.xilinx-card { border-color: var(--xilinx); }
.brand-card.xilinx-card .brand-name { color: var(--xilinx); }
.brand-card.ti-card { border-color: var(--ti); }
.brand-card.ti-card .brand-name { color: var(--ti); }
.brand-card.st-card { border-color: var(--st); }
.brand-card.st-card .brand-name { color: var(--st); }
.brand-card.adi-card { border-color: var(--adi); }
.brand-card.adi-card .brand-name { color: var(--adi); }
.brand-card.intel-card { border-color: var(--intel); }
.brand-card.intel-card .brand-name { color: var(--intel); }

/* 优势 */
.advantages {
    padding: var(--space-3xl) 0;
    background: var(--bg-dark);
    color: white;
}

.advantages .section-header h2,
.advantages .section-header p {
    color: white;
}

.adv-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.adv-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all 0.3s ease;
}

.adv-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.adv-icon-wrap {
    width: 56px;
    height: 56px;
    background: var(--primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.adv-icon-wrap svg {
    width: 28px;
    height: 28px;
    color: white;
}

.adv-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.adv-card p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* 联系我们 */
.contact {
    padding: var(--space-3xl) 0;
    background: var(--bg-light);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.contact-methods {
    margin-bottom: var(--space-xl);
}

.contact-methods h4,
.company-info h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.method-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.method-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.method-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.method-icon {
    font-size: 1.5rem;
}

.method-info {
    display: flex;
    flex-direction: column;
}

.method-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.method-value {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.company-info {
    padding: var(--space-lg);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.company-info p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

/* 表单样式 */
.contact-form {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand .logo {
    display: block;
    margin-bottom: var(--space-sm);
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: white;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* 语言切换器 */
.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.875rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: var(--primary);
}

.lang-btn.active {
    border-color: var(--primary);
}

.lang-arrow {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.lang-btn.active .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    min-width: 140px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown li {
    padding: 0.625rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.lang-dropdown li:hover {
    background: var(--bg-light);
    color: var(--primary);
}

/* 响应式布局 */
@media (min-width: 640px) {
    .badges-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .table-row {
        grid-template-columns: 2fr 3fr 1fr auto;
    }
    
    .part-number,
    .part-desc {
        grid-column: auto;
    }
    
    .table-header {
        display: grid;
        grid-template-columns: 2fr 3fr 1fr auto;
        gap: var(--space-sm);
        margin-bottom: var(--space-sm);
    }
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        display: flex;
    }
    
    .tagline {
        display: block;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .section-header h2 {
        font-size: 2.5rem;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .brand-showcase {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .hero .container {
        grid-template-columns: 1.2fr 1fr;
        text-align: left;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-desc {
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero-stats {
        justify-content: flex-start;
    }
    
    .hero-cta {
        justify-content: flex-start;
    }
    
    .hero-brands {
        display: block;
    }
    
    .brands-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .adv-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr 1.2fr;
    }
    
    .footer-content {
        grid-template-columns: 1.5fr 1fr;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.adv-card,
.brand-card,
.product-brand-section {
    animation: fadeInUp 0.6s ease forwards;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}