/**
 * PCL 餐饮批发商 - 现代B2B专业样式表 v2.0
 * 环保快餐用品及损耗用品批发
 */

/* ========== CSS变量 ========== */
:root {
    /* 主色调 — 专业绿 */
    --primary-900: #006B32;
    --primary-800: #007A3D;
    --primary-700: #008944;
    --primary-600: #009543;
    --primary-500: #00B34A;
    --primary-400: #00C95A;
    --primary-300: #4ADE80;
    --primary-200: #86EFAC;
    --primary-100: #DCFCE7;
    --primary-50: #F0FDF4;

    /* 别名变量 */
    --primary-color: #009543;
    --primary-dark: #006B32;
    --primary-light: #00C95A;
    --success-color: #10B981;
    --bg-card: #ffffff;
    --bg-primary: #f0fdf4;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    
    /* 辅助色 */
    --neutral-900: #111827;
    --neutral-800: #1F2937;
    --neutral-700: #374151;
    --neutral-600: #4B5563;
    --neutral-500: #6B7280;
    --neutral-400: #9CA3AF;
    --neutral-300: #D1D5DB;
    --neutral-200: #E5E7EB;
    --neutral-100: #F3F4F6;
    --neutral-50: #F9FAFB;
    --white: #FFFFFF;
    
    /* 强调色 */
    --accent-500: #F59E0B;
    --accent-400: #FBBF24;
    --accent-100: #FEF3C7;
    
    /* 功能色 */
    --success-500: #10B981;
    --success-100: #D1FAE5;
    --warning-500: #F59E0B;
    --warning-100: #FEF3C7;
    --danger-500: #EF4444;
    --danger-100: #FEE2E2;
    --info-500: #3B82F6;
    --info-100: #DBEAFE;
    
    /* 阴影 */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    
    /* 间距 */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--neutral-50);
    color: var(--neutral-800);
    line-height: 1.6;
    min-height: 100vh;
}

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

ul, ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    outline: none;
}

/* ========== 容器 ========== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.container-lg {
    max-width: 1440px;
}

/* ========== 顶部工具栏 ========== */
.top-bar {
    background: var(--neutral-900);
    color: var(--neutral-300);
    font-size: 0.8125rem;
    padding: var(--spacing-2) 0;
}

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

.top-bar a {
    color: var(--primary-400);
    transition: color var(--transition-fast);
}

.top-bar a:hover {
    color: var(--primary-300);
}

.top-bar-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.top-bar-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.lang-switch {
    display: flex;
    gap: var(--spacing-2);
}

.lang-btn {
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--neutral-400);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--white);
    background: var(--neutral-700);
}

.lang-btn.active {
    color: var(--white);
    background: var(--primary-600);
}

/* ========== 主导航 ========== */
.main-header {
    background: var(--white);
    border-bottom: 1px solid var(--neutral-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) 0;
    gap: var(--spacing-8);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-img {
    height: 80px;
    width: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.375rem;
    font-weight: 700;
    color: #111827;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.logo-name-en {
    font-size: 0.75rem;
    color: #6b7280;
    font-weight: 400;
    margin-top: 2px;
}

.logo-tagline {
    font-size: 0.75rem;
    color: #00b34a;
    margin-top: 4px;
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.header-contact {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: 0.875rem;
    color: var(--neutral-800);
}

.contact-item a {
    color: var(--neutral-800);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--primary-600);
}

.contact-item i {
    color: var(--primary-600);
    font-size: 1rem;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--success-500);
    color: var(--white);
    padding: var(--spacing-3) var(--spacing-5);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.whatsapp-btn:hover {
    background: #0EA472;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 导航栏 */
.navbar {
    background: var(--white);
    border-top: 1px solid var(--neutral-100);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-1);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-5);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--neutral-800);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--primary-600);
    background: var(--primary-50);
    text-decoration: none;
}

.nav-link.active {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
}

.nav-link i {
    font-size: 0.875rem;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.cart-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-3) var(--spacing-5);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.cart-btn:hover {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.cart-badge {
    background: var(--white);
    color: var(--primary-600);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--neutral-700);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ========== Hero 区域 ========== */
.hero {
    background: linear-gradient(135deg, var(--neutral-900) 0%, var(--primary-900) 50%, var(--primary-800) 100%);
    color: var(--white);
    padding: var(--spacing-20) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
    letter-spacing: -0.025em;
}

.hero-content p {
    font-size: 1.125rem;
    color: var(--neutral-300);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-8);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-300);
}

.hero-badge i {
    color: var(--primary-400);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-3);
}

/* ========== 按钮基础样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    border: 2px solid transparent;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--primary-600);
    color: white;
    border-color: var(--primary-600);
}

.btn-primary:hover {
    background: var(--primary-700);
    border-color: var(--primary-700);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-600);
    border-color: var(--primary-600);
}

.btn-outline:hover {
    background: var(--primary-50);
}

.btn-primary-lg {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--primary-500);
    color: var(--white);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-primary-lg:hover {
    background: var(--primary-400);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,181,74,0.35);
}

.btn-outline-lg {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: transparent;
    color: var(--white);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.3);
    transition: all var(--transition-base);
}

.btn-outline-lg:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-logo-wrap {
    background: rgba(255,255,255,0.95);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-2xl);
    max-width: 320px;
}

.hero-logo-wrap img {
    border-radius: var(--radius-lg);
}

/* ========== 统计区域 ========== */
.stats-section {
    background: var(--white);
    padding: var(--spacing-16) 0;
    border-bottom: 1px solid var(--neutral-200);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.stat-card:hover {
    background: var(--primary-50);
}

.stat-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-100);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-4);
    color: var(--primary-600);
    font-size: 1.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--neutral-900);
    line-height: 1;
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--neutral-500);
}

/* ========== 客户展示 ========== */
.clients-section {
    background: var(--neutral-50);
    padding: var(--spacing-16) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--primary-100);
    color: var(--primary-700);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-4);
    letter-spacing: -0.025em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--neutral-500);
    max-width: 600px;
    margin: 0 auto;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-4);
}

.client-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.client-card:hover {
    border-color: #00b34a;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.client-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 1.5rem;
    color: #00b34a;
    transition: all 0.3s ease;
}

.client-card:hover .client-icon {
    background: #00b34a;
    color: white;
    transform: scale(1.1);
}

.client-name {
    font-size: 1rem;
    font-weight: 600;
    color: #111827;
}

.client-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--neutral-700);
}

/* ========== 认证 ========== */
.certs-section {
    background: var(--neutral-900);
    padding: var(--spacing-16) 0;
    color: var(--white);
}

.certs-section .section-title {
    color: var(--white);
}

.certs-section .section-subtitle {
    color: var(--neutral-400);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-4);
}

.cert-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: all var(--transition-base);
}

.cert-card:hover {
    background: rgba(255,255,255,0.15);
    border-color: var(--primary-400);
    transform: translateY(-4px);
}

.cert-icon-wrap {
    width: 64px;
    height: 64px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.5rem;
    color: #4ADE80;
    transition: all 0.3s ease;
}

.cert-card:hover .cert-icon-wrap {
    background: #00b34a;
    color: white;
    transform: scale(1.1);
}

.cert-name {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: white;
}

.cert-desc {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.7);
}

/* ========== 产品展示 ========== */
.products-section {
    background: var(--white);
    padding: var(--spacing-20) 0;
}

.products-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-8);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.search-box {
    display: flex;
    gap: var(--spacing-2);
    max-width: 400px;
    flex: 1;
}

.search-input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--primary-500);
}

.search-btn {
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-3) var(--spacing-5);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast);
}

.search-btn:hover {
    background: var(--primary-700);
}

/* 分类筛选 */
.categories-filter {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-8);
    flex-wrap: wrap;
}

.cat-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    background: var(--neutral-100);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--neutral-600);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.cat-filter-btn:hover {
    background: var(--primary-50);
    color: var(--primary-700);
}

.cat-filter-btn.active {
    background: var(--primary-600);
    color: var(--white);
    border-color: var(--primary-600);
}

.cat-filter-btn i {
    font-size: 0.8125rem;
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-6);
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-200);
    transform: translateY(-4px);
}

.product-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, var(--neutral-100) 0%, var(--neutral-50) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.product-image .eco-badge {
    position: absolute;
    top: var(--spacing-3);
    left: var(--spacing-3);
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.product-image i {
    font-size: 4rem;
    color: var(--neutral-300);
}

.product-badge {
    position: absolute;
    top: var(--spacing-3);
    left: var(--spacing-3);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.product-badge i {
    font-size: 0.625rem;
}

.product-info {
    padding: var(--spacing-5);
}

.product-sku {
    font-size: 0.75rem;
    color: var(--neutral-400);
    margin-bottom: var(--spacing-1);
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-3);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--spacing-4);
}

.product-price-wrap {
    display: flex;
    flex-direction: column;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-600);
    line-height: 1;
}

.product-unit {
    font-size: 0.75rem;
    color: var(--neutral-400);
    margin-top: var(--spacing-1);
}

.product-stock {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.product-stock.in-stock {
    background: var(--success-100);
    color: var(--success-500);
}

.product-stock.low-stock {
    background: var(--warning-100);
    color: var(--warning-500);
}

.product-stock.out-of-stock {
    background: var(--danger-100);
    color: var(--danger-500);
}

.add-to-cart-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.add-to-cart-btn:hover {
    background: var(--primary-700);
}

.add-to-cart-btn:disabled {
    background: var(--neutral-300);
    cursor: not-allowed;
}

/* ========== 特色区域 ========== */
.features-section {
    background: var(--neutral-50);
    padding: var(--spacing-20) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-5);
    color: var(--primary-600);
    font-size: 2rem;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-3);
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--neutral-500);
    line-height: 1.6;
}

/* ========== CTA 横幅 ========== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-600) 100%);
    padding: var(--spacing-20) 0;
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-4);
}

.cta-desc {
    font-size: 1.125rem;
    color: var(--primary-100);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.btn-white-lg {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--white);
    color: var(--primary-700);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-white-lg:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-white-lg {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    background: transparent;
    color: var(--white);
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.5);
    transition: all var(--transition-base);
}

.btn-outline-white-lg:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--white);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--neutral-900);
    color: var(--neutral-300);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-12);
}

.footer-brand {
    padding-right: var(--spacing-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.footer-logo img {
    height: 40px;
    border-radius: var(--radius-md);
}

.footer-logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--white);
}

.footer-desc {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-6);
}

.footer-social {
    display: flex;
    gap: var(--spacing-3);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--neutral-800);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neutral-400);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-600);
    color: var(--white);
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-5);
    padding-bottom: var(--spacing-3);
    border-bottom: 2px solid var(--neutral-800);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--neutral-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-400);
}

.footer-links li {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
    font-size: 0.9375rem;
}

.footer-contact-item i {
    color: var(--primary-500);
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid var(--neutral-800);
    padding-top: var(--spacing-8);
    text-align: center;
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--neutral-500);
}

/* ========== 购物车侧边栏 ========== */
.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.cart-overlay.open {
    opacity: 1;
    visibility: visible;
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: -420px;
    width: 420px;
    max-width: 100vw;
    height: 100vh;
    background: var(--white);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    transition: right var(--transition-slow);
    box-shadow: var(--shadow-2xl);
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-5) var(--spacing-6);
    background: var(--neutral-900);
    color: var(--white);
}

.cart-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: 1.125rem;
    font-weight: 600;
}

.cart-close {
    background: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    padding: var(--spacing-2);
    transition: color var(--transition-fast);
}

.cart-close:hover {
    color: var(--white);
}

.cart-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-4);
}

.cart-empty {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-6);
    color: var(--neutral-400);
}

.cart-empty i {
    font-size: 4rem;
    margin-bottom: var(--spacing-4);
    opacity: 0.5;
}

.cart-item {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--neutral-50);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-3);
}

.cart-item-image {
    width: 64px;
    height: 64px;
    background: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.cart-item-image i {
    font-size: 1.5rem;
    color: var(--neutral-300);
}

.cart-item-info {
    flex: 1;
    min-width: 0;
}

.cart-item-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-1);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cart-item-sku {
    font-size: 0.75rem;
    color: var(--neutral-500);
    margin-bottom: var(--spacing-1);
}

.cart-item-price {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: var(--spacing-2);
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.qty-btn {
    width: 28px;
    height: 28px;
    background: var(--white);
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: var(--neutral-600);
    transition: all var(--transition-fast);
}

.qty-btn:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    color: var(--primary-600);
}

.qty-input {
    width: 50px;
    text-align: center;
    padding: var(--spacing-1);
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-sm);
}

.cart-item-sub {
    margin-top: 4px;
    font-size: 0.8rem;
    color: #888;
}

.cart-item-rm {
    background: none;
    border: none;
    color: #ccc;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    transition: color 0.2s;
    align-self: flex-start;
    margin-top: 4px;
}

.cart-item-rm:hover {
    color: #e53935;
}

/* ========== 表单样式 ========== */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--neutral-700);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9375rem;
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-lg);
    background: var(--white);
    color: var(--neutral-800);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(0, 181, 74, 0.1);
    outline: none;
}

.form-control::placeholder {
    color: var(--neutral-400);
}
    text-align: center;
    padding: var(--spacing-1);
    border: 1px solid var(--neutral-300);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.cart-item-remove {
    color: var(--danger-500);
    padding: var(--spacing-2);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.cart-item-remove:hover {
    color: var(--danger-700);
}

.cart-footer {
    padding: var(--spacing-5) var(--spacing-6);
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-200);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.cart-total-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--neutral-700);
}

.cart-total-amount {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-600);
}

.checkout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    background: var(--primary-600);
    color: var(--white);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.checkout-btn:hover {
    background: var(--primary-700);
}

/* ========== 通知 ========== */
.notif {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-lg);
    color: var(--white);
    font-size: 0.9375rem;
    font-weight: 500;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

.notif-suc {
    background: var(--success-500);
}

.notif-err {
    background: var(--danger-500);
}

.notif-war {
    background: var(--warning-500);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
    .clients-grid,
    .certs-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-badges {
        justify-content: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .top-bar-inner {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding-top: var(--spacing-16);
        box-shadow: var(--shadow-2xl);
        transition: left var(--transition-slow);
        z-index: 1001;
    }
    
    .nav-links.active {
        left: 0;
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        padding: var(--spacing-4) var(--spacing-6);
        border-bottom: 1px solid var(--neutral-100);
    }

    /* 遮罩層 */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s;
        z-index: 1000;
    }

    .nav-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }
    
    .header-main {
        flex-wrap: wrap;
    }
    
    .header-contact {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-12) 0;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .clients-grid,
    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .footer-brand {
        padding-right: 0;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cart-sidebar {
        width: 100%;
        right: -100%;
    }
}

@media (max-width: 480px) {
    .logo-img {
        height: 44px;
    }
    
    .logo-name {
        font-size: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        display: flex;
        align-items: center;
        gap: var(--spacing-4);
        text-align: left;
    }
    
    .stat-icon {
        margin: 0;
        flex-shrink: 0;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .clients-grid,
    .certs-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .top-bar,
    .main-header,
    .navbar,
    .footer,
    .cart-btn,
    .add-to-cart-btn,
    .cta-section {
        display: none;
    }
    
    body {
        background: white;
    }
    
    .hero {
        background: white;
        color: black;
        padding: 1rem 0;
    }
    
    .hero-content h1 {
        color: black;
    }

    .hero-slider {
        width: 100%;
        aspect-ratio: 16/9;
        position: relative;
        overflow: hidden;
    }

    .hero-slide {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        opacity: 0;
        transition: opacity 0.5s;
    }

    .hero-slide.active {
        opacity: 1;
    }

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

    .hero-slider-dots {
        display: flex;
        justify-content: center;
        gap: 8px;
        margin-top: 10px;
    }

    .hero-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: rgba(0,0,0,0.3);
        cursor: pointer;
    }

    .hero-dot.active {
        background: var(--primary-500, #2563eb);
    }

    .nav-links.active {
        left: 0;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}