/* ============================================
   华冠众汇供应链管理系统 By 黄国友
   ============================================ */

/* ===== CSS变量定义 ===== */
:root {
    /* 主色调 */
    --primary-dark: #0f172a;
    --primary: #1e3a5f;
    --primary-light: #2d5a87;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #6366f1 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* 中性色 */
    --bg-dark: #0a0f1c;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--accent-glow);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-dark);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ===== 响应式容器 ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 主体内容区域最小高度 */
section.container {
    min-height: 400px;
    padding-bottom: var(--spacing-xl);
}

.container-fluid {
    width: 100%;
}

/* ===== 头部导航 ===== */
.header {
    background: rgba(10, 15, 28, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 15, 28, 0.95);
    box-shadow: var(--shadow-lg);
}

.header-container {
    width: 100%;
    padding: 0 var(--spacing-xl);
    max-width: none;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: 1.75rem;
}

.nav {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: var(--transition-normal);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.nav a:hover,
.nav a.active {
    color: var(--text-primary);
}

.nav a:hover::after,
.nav a.active::after {
    width: 60%;
}

.nav-toggle {
    display: none;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.5rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.nav-toggle:hover {
    background: var(--accent);
    border-color: var(--accent);
}

/* ===== Hero区域 ===== */
.hero {
    padding: 8rem 0 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    width: 150%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
    transform: translateX(-50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--bg-glass);
    border-color: var(--accent);
    color: var(--accent-light);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

/* ===== 统计卡片 ===== */
.stats-section {
    padding: var(--spacing-3xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background: var(--gradient-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ===== 分类区块 ===== */
.section {
    padding: var(--spacing-3xl) 0;
}

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

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    text-decoration: none;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.category-card:hover::before {
    transform: scaleX(1);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.category-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}

.card-image {
    aspect-ratio: 16/10;
    background: var(--bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

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

.card-image-placeholder {
    font-size: 4rem;
    opacity: 0.3;
}

.card-body {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--accent-glow);
    color: var(--accent-light);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    width: fit-content;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.card-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-top: auto;
}

/* ===== 供应商卡片 ===== */
.supplier-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.supplier-card {
    background: var(--gradient-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-decoration: none;
    transition: var(--transition-normal);
    display: flex;
    gap: var(--spacing-lg);
}

.supplier-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.supplier-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 2.5rem;
}

.supplier-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.supplier-info {
    flex: 1;
}

.supplier-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.supplier-location {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.supplier-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.supplier-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

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

.supplier-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-light);
}

.supplier-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Banner轮播 ===== */
.banner-section {
    padding: var(--spacing-2xl) 0;
}

.banner-slider {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.banner-slide {
    display: none;
    position: relative;
    aspect-ratio: 21/9;
}

.banner-slide.active {
    display: block;
}

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

.banner-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-2xl);
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
}

.banner-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.banner-desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.8);
}

.banner-dots {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition-fast);
}

.banner-dot.active {
    background: white;
    width: 30px;
}

/* ===== 侧边栏（产品列表页） ===== */
.page-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-2xl) 0;
}

.sidebar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: var(--spacing-xs);
}

.sidebar-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.sidebar-menu a.active {
    border-left: 3px solid var(--accent);
}

/* 子分类 */
.category-children {
    list-style: none;
    margin-left: var(--spacing-lg);
    display: none;
}

.category-item.open .category-children {
    display: block;
}

.category-arrow {
    transition: var(--transition-fast);
}

.category-item.open .category-arrow {
    transform: rotate(90deg);
}

/* ===== 搜索栏 ===== */
.search-bar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.search-form {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.pagination a:hover,
.pagination .current {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.pagination .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== 页脚 ===== */
.footer {
    background: rgba(10, 15, 28, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.footer-section a,
.footer-section p {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--text-muted);
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

/* ===== 加载状态 ===== */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 页面标题区 ===== */
.page-header {
    background: var(--gradient-hero);
    padding: 6rem 0 3rem;
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.2) 0%, transparent 60%);
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ===== 供应商详情页 ===== */
.supplier-profile {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.supplier-profile-header {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.supplier-profile-logo {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    flex-shrink: 0;
}

.supplier-profile-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.supplier-profile-info {
    flex: 1;
}

.supplier-profile-name {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.supplier-profile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.supplier-profile-desc {
    color: var(--text-secondary);
    line-height: 1.8;
}

.supplier-profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

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

.profile-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
}

.profile-stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===== 产品详情页 ===== */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.product-main-image {
    aspect-ratio: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.product-main-image-placeholder {
    font-size: 6rem;
    opacity: 0.2;
}

.product-thumbnails {
    display: flex;
    gap: var(--spacing-sm);
}

.product-thumbnail {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 2px solid transparent;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition-fast);
}

.product-thumbnail.active,
.product-thumbnail:hover {
    border-color: var(--accent);
}

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

.product-info {
    padding: var(--spacing-lg) 0;
}

.product-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent-glow);
    color: var(--accent-light);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.product-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.product-supplier {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    text-decoration: none;
}

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

.product-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: var(--spacing-xl);
}

.product-meta {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.product-meta-item {
    display: flex;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.product-meta-item:last-child {
    border-bottom: none;
}

.product-meta-label {
    width: 100px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.product-meta-value {
    color: var(--text-primary);
}

/* ===== 文档卡片 ===== */
.document-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.document-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition-normal);
}

.document-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.document-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.document-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.document-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.document-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.document-download {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.document-size {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.document-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    font-size: 0.9rem;
}

.document-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* ===== 辅助类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }
.text-accent { color: var(--accent-light); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ===== 移动端适配 ===== */
@media (max-width: 1024px) {
    .page-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .product-detail {
        grid-template-columns: 1fr;
    }
    
    .product-gallery {
        position: static;
    }
    
    .supplier-profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .supplier-profile-logo {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 3rem;
    }
    
    /* 移动端容器全宽 */
    .container,
    .container-fluid,
    section.container,
    section.container-fluid {
        max-width: 100% !important;
        width: 100% !important;
        padding: 0 0.5rem !important;
        margin: 0 !important;
    }
    
    .header-content {
        flex-wrap: wrap;
        max-width: 100% !important;
        padding: 0 0.5rem !important;
    }
    
    .header-container {
        padding: 0 !important;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 15, 28, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-xs);
        border-top: 1px solid var(--border-color);
        z-index: 1001;
    }
    
    .nav.show {
        display: flex;
    }
    
    .nav a {
        width: 100%;
        text-align: center;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero {
        padding: 7rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
    
    .category-card {
        padding: var(--spacing-md);
    }
    
    .category-icon {
        font-size: 2rem;
    }
    
    .category-name {
        font-size: 0.9rem;
    }
    
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    .card-title {
        font-size: 1rem;
    }
    
    .supplier-grid {
        grid-template-columns: 1fr;
    }
    
    .banner-slide {
        aspect-ratio: 16/9;
    }
    
    .banner-overlay {
        padding: var(--spacing-lg);
    }
    
    .banner-title {
        font-size: 1.5rem;
    }
    
    .product-title {
        font-size: 1.5rem;
    }
    
    .product-price {
        font-size: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-section a,
    .footer-section p {
        margin-bottom: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-input {
        width: 100%;
    }
    
    .search-form .btn {
        width: 100%;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
}

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

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.slide-in {
    animation: slideIn 0.5s ease forwards;
}

/* 延迟动画 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ===== 分享功能 ===== */
.supplier-profile-header {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.supplier-profile-actions {
    margin-left: auto;
    flex-shrink: 0;
}

.supplier-profile-actions .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
}

/* 分享弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

.modal-overlay.show {
    display: flex;
    z-index: 9999;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 90%;
    animation: fadeIn 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: 1.5rem;
}

.share-modal {
    width: 420px;
}

.captcha-modal {
    width: 360px;
}

.captcha-modal .form-input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    text-align: center;
    letter-spacing: 4px;
}

.share-tip {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.share-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.share-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.share-btn span:last-child {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.share-url-box {
    display: flex;
    gap: 0.5rem;
}

.share-url-box input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.qr-modal {
    width: 280px;
}

.qr-modal .modal-body {
    padding: 1.5rem;
}

#qrcode img, #qrcode canvas {
    display: block;
    margin: 0 auto;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .supplier-profile-header {
        flex-direction: column;
    }
    
    .supplier-profile-actions {
        margin-left: 0;
        width: 100%;
    }
    
    .supplier-profile-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .share-modal {
        width: 95%;
    }
    
    .share-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}
.delay-5 { animation-delay: 0.5s; }

/* 品牌墙样式 */
.brand-wall {
    padding: var(--spacing-xl) 0;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-lg);
}

.brand-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.brand-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.brand-item img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
}

/* 新闻中心样式 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.news-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.news-item:hover {
    border-color: var(--accent);
}

.news-cover {
    width: 200px;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.news-content {
    flex: 1;
}

.news-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.news-title:hover {
    color: var(--accent);
}

.news-meta {
    display: flex;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.news-summary {
    color: var(--text-secondary);
    line-height: 1.6;
}

.news-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.news-detail-cover {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
}

.news-detail-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.news-detail-meta {
    display: flex;
    gap: var(--spacing-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.news-detail-content {
    color: var(--text-primary);
    line-height: 2;
    font-size: 1.1rem;
}

.news-detail-content img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
}

@media (max-width: 768px) {
    .brand-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
    
    .brand-item {
        padding: var(--spacing-sm);
    }
    
    .brand-item img {
        max-height: 50px;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-cover {
        width: 100%;
        height: 200px;
    }
}

/* 首页资讯中心卡片样式 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 24px 0;
}

.news-card {
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    border: 1px solid #e8e8e8;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    border-color: #2563eb;
}

.news-card:hover .news-title {
    color: #2563eb;
}

.news-card:hover .news-cover img {
    transform: scale(1.05);
}

.news-card .news-cover {
    width: 100%;
    height: 160px;
    background: #f0f0f0;
    overflow: hidden;
    position: relative;
}

.news-card .news-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card .news-cover .no-cover {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 14px;
}

.news-card .news-content {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card .news-title {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.news-card .news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
}

.news-card .category-tag {
    background: #e8f4fd;
    color: #2563eb;
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.news-card .date {
    color: #999;
}

@media (max-width: 1200px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-card .news-cover {
        height: 200px;
    }
}