/* ============================================
   CSS 变量定义 - 便于主题定制
   ============================================ */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --secondary-color: #1e293b;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-primary);
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 0.5rem;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ============================================
   头部导航样式
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* 语言切换器样式 */
.nav-lang-item {
    list-style: none;
}

.nav-lang-switcher {
    position: relative;
}

.nav-lang-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

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

.nav-lang-btn .flag-img {
    width: 24px;
    height: 18px;
    object-fit: cover;
    border-radius: 3px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.nav-lang-btn .fa-chevron-down {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.nav-lang-btn.active .fa-chevron-down {
    transform: rotate(180deg);
}

.nav-lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition);
    z-index: 1000;
    overflow: hidden;
}

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

.nav-lang-dropdown .lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.nav-lang-dropdown .lang-option:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.nav-lang-dropdown .lang-option.active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-color);
    font-weight: 600;
}

.nav-lang-dropdown .lang-option .flag-img {
    width: 22px;
    height: 16px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

/* 头部隐藏状态 */
.header.hidden {
    transform: translateY(-100%);
}

/* 搜索框固定状态 */
.search-box-wrapper.sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 998;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
    margin-bottom: 0;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.search-box-wrapper.sticky.visible {
    transform: translateY(0);
    opacity: 1;
}

.search-box-wrapper.sticky .search-box {
    max-width: 600px;
    margin: 0 auto;
}

.search-box-wrapper.sticky .search-tags {
    display: none;
}

/* ============================================
   英雄区域样式
   ============================================ */
.hero {
    padding-top: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    z-index: 0;
}

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

.hero-layout {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-title span {
    color: var(--primary-color);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    min-width: 120px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.375rem;
    display: block;
}

.hero-visual {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-main-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.hero-image {
    width: 100%;
    max-width: 500px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(2) {
    top: 20%;
    left: -10%;
    animation-delay: -2s;
}

.floating-card:nth-child(3) {
    bottom: 20%;
    right: -10%;
    animation-delay: -4s;
}

.floating-card-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.floating-card-text {
    font-size: 0.875rem;
    font-weight: 500;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* ============================================
   产品展示样式 - 电商风格
   ============================================ */
.products {
    background-color: var(--bg-secondary);
    padding: 2rem 0 5rem;
}

.products-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 2rem;
    align-items: start;
}

/* 左侧分类侧边栏 */
.products-sidebar {
    background: white;
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 100px;
}

.filter-group {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.25rem;
}

.filter-group:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.875rem;
}

.filter-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.filter-toggle {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
}

.filter-toggle:hover {
    color: var(--primary-color);
}

.category-item {
    border-bottom: 1px solid var(--border-color);
}

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

.category-header-row {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.category-filter-btn {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 0;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: var(--transition);
    text-align: left;
}

.category-filter-btn:hover {
    color: var(--primary-color);
}

.category-filter-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.category-filter-btn.active .category-count {
    color: var(--primary-color);
}

.category-name {
    font-weight: 500;
    flex: 1;
}

.category-count {
    color: var(--text-light);
    font-size: 0.8125rem;
}

.subcategory-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding-left: 0.5rem;
}

.category-item.active .subcategory-list {
    max-height: 300px;
    padding-bottom: 0.75rem;
}

.subcategory-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0;
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    transition: var(--transition);
    text-decoration: none;
}

.subcategory-link:hover {
    color: var(--primary-color);
}

.subcategory-link.active {
    color: var(--primary-color);
    font-weight: 500;
}

/* 搜索框样式 */
.search-box-wrapper {
    margin-bottom: 1.5rem;
    text-align: center;
}

.search-box {
    display: inline-flex;
    align-items: center;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 0.375rem;
    max-width: 600px;
    width: 100%;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    background: transparent;
    color: var(--text-primary);
}

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

.search-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

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

.search-btn i {
    font-size: 1rem;
}

.search-tags {
    margin-top: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.search-tag {
    padding: 0.375rem 0.875rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.search-tag:hover {
    background: white;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 产品区域 */
.products-main {
    min-width: 0;
}

.products-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: white;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

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

.products-sort {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.products-sort select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: white;
    cursor: pointer;
    outline: none;
}

.view-switch {
    display: flex;
    gap: 0.25rem;
}

.view-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.view-btn.active,
.view-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.product-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
}

.product-image-wrapper {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: #f5f5f5;
}

.product-img-link {
    display: block;
    width: 100%;
    height: 100%;
}

.product-img-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.25rem 0.625rem;
    background-color: var(--accent-color);
    color: white;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    z-index: 2;
}

.product-actions {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    opacity: 0;
    transform: translateX(10px);
    transition: var(--transition);
    z-index: 2;
}

.product-card:hover .product-actions {
    opacity: 1;
    transform: translateX(0);
}

.action-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: white;
    border: none;
    box-shadow: var(--shadow-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--primary-color);
    color: white;
}

.product-content {
    padding: 1rem;
}

.product-name {
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.6em;
}

.product-name a {
    color: inherit;
}

.product-name a:hover {
    color: var(--primary-color);
}



/* ============================================
   特性介绍样式
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: var(--transition);
}

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(96, 165, 250, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    transform: rotate(10deg) scale(1.1);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   关于我们样式
   ============================================ */
.about {
    background-color: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    height: 450px;
    background: linear-gradient(135deg, var(--secondary-color), #334155);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.about-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.3), rgba(96, 165, 250, 0.3));
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-list {
    margin-bottom: 2rem;
}

.about-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1rem;
    color: var(--text-secondary);
}

.about-list i {
    color: var(--primary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

/* ============================================
   联系我们样式
   ============================================ */
.contact {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.45) 0%, rgba(30, 41, 59, 0.45) 100%),
                url('http://zgyncqsmyxgs.leapzii.com/tc/view.php/f23df5743c9bc4775ba95a60d490f81c.png') center/cover no-repeat;
    color: white;
}

.contact .section-title h2 {
    color: white;
}

.contact .section-title p {
    color: rgba(255, 255, 255, 0.7);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.contact-details {
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary-light);
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-text p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.15);
}

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

.form-submit {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
}

.form-group label .required {
    color: #ef4444;
    margin-left: 2px;
}

.contact-alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    animation: slideDown 0.3s ease;
}

.contact-alert.success {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.contact-alert.error {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   分页样式
   ============================================ */
.products-pagination {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

.pagination {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pagination-btn {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.5rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.pagination-ellipsis {
    color: var(--text-light);
    padding: 0 0.25rem;
}

/* 无商品提示 */
.no-products {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.no-products i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-products p {
    font-size: 1.125rem;
}

/* 产品加载动画 */
.products-loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.products-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.products-loading span {
    font-size: 0.875rem;
}

/* ============================================
   列表视图模式
   ============================================ */
.products-grid.list-mode {
    grid-template-columns: 1fr;
}

.products-grid.list-mode .product-card {
    display: grid;
    grid-template-columns: 200px 1fr;
}

.products-grid.list-mode .product-image-wrapper {
    aspect-ratio: auto;
    height: 200px;
}

.products-grid.list-mode .product-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem;
}

.products-grid.list-mode .product-name {
    font-size: 1.125rem;
    -webkit-line-clamp: 3;
}

/* ============================================
   页脚样式
   ============================================ */
.footer {
    background-color: #0f172a;
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.footer-brand p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 0.5rem;
}

/* 底部栏标签云 */
.footer-tags {
    grid-column: span 2;
}

.footer-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.footer-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-tag:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--primary-light);
    padding-left: 0.75rem;
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.back-to-top {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    transition: var(--transition);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ============================================
   移动端底部筛选浮层
   ============================================ */
.mobile-filter-fab {
    display: none;
}

.mobile-filter-overlay {
    display: none;
}

.mobile-filter-sheet {
    display: none;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .products-layout {
        grid-template-columns: 220px 1fr;
        gap: 1.5rem;
    }

    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .hero-layout {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        max-width: 80%;
        margin: 0 auto;
    }

    .products-layout {
        grid-template-columns: 220px 1fr;
        gap: 1.5rem;
    }

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

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    /* 导航栏 */
    .header .container {
        height: auto;
        min-height: 60px;
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
        flex-wrap: wrap;
    }

    .mobile-menu-btn {
        display: flex;
        order: 3;
    }

    .logo {
        order: 1;
    }

    /* 移动端语言切换器在汉堡菜单中显示 */
    .nav-lang-item {
        width: 100%;
        display: flex;
        justify-content: center;
    }

    .nav-lang-switcher {
        width: auto;
    }

    .nav-lang-btn {
        background: transparent;
        border: none;
        border-radius: var(--radius-md);
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
        width: auto;
    }

    .nav-lang-btn:hover {
        background-color: var(--bg-secondary);
    }

    .nav-lang-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: 1px solid var(--border-color);
        margin-top: 0.5rem;
        border-radius: var(--radius-md);
        min-width: 180px;
    }

    .nav-lang-dropdown .lang-option {
        padding: 0.75rem 1rem;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        gap: 0.5rem;
        z-index: 999;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
        border-radius: var(--radius-md);
        text-align: center;
    }

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

    .nav-lang-item {
        padding: 0.5rem 0;
        border-top: 1px solid var(--border-color);
    }

    .lang-dropdown {
        min-width: 130px;
    }

    .lang-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .flag-img {
        width: 20px;
        height: 15px;
    }

    /* 英雄区域 */
    .hero {
        padding: 80px 0 2rem;
        min-height: auto;
    }

    .hero-layout {
        flex-direction: column;
        gap: 1.5rem;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .hero-title span {
        font-size: 2.2rem;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .hero-buttons .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .hero-stats {
        justify-content: center;
        gap: 1rem;
        margin-top: 1.5rem;
    }

    .stat-item {
        padding: 0.75rem 1rem;
        min-width: 100px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .hero-visual {
        max-width: 100%;
    }

    .hero-main-img {
        border-radius: var(--radius-md);
    }

    /* 搜索栏 - 移动端禁用固定搜索框 */
    .search-box-wrapper.sticky {
        position: static;
        transform: none;
        opacity: 1;
        box-shadow: none;
        padding: 0;
    }

    .search-box-wrapper {
        padding: 0.75rem;
        margin: 0.75rem 0;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: white;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-full);
        padding: 0.25rem;
        max-width: 100%;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    }

    .search-input {
        flex: 1;
        border: none;
        outline: none;
        padding: 0.625rem 0.875rem;
        font-size: 0.9rem;
        background: transparent;
    }

    .search-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: var(--radius-full);
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
        white-space: nowrap;
    }

    .search-btn span {
        display: none;
    }

    .search-tags {
        display: none;
    }

    /* 产品布局 */
    .products-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .products-sidebar {
        display: none;
    }

    .filter-header,
    .filter-title,
    .category-item,
    .category-filter-btn,
    .subcategory-link {
        display: none;
    }

    /* 底部筛选浮动按钮 */
    .mobile-filter-fab {
        display: flex;
        align-items: center;
        gap: 0.4rem;
        position: fixed;
        bottom: 1.5rem;
        right: 1rem;
        z-index: 999;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: var(--radius-full);
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
        font-weight: 600;
        box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
        cursor: pointer;
        transition: var(--transition);
        animation: fabPulse 2s ease-in-out infinite;
    }

    .mobile-filter-fab:active {
        transform: scale(0.95);
    }

    .mobile-filter-fab i {
        font-size: 1rem;
    }

    .fab-badge {
        position: absolute;
        top: -4px;
        right: -4px;
        background: #ef4444;
        color: white;
        font-size: 0.65rem;
        font-weight: 700;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    @keyframes fabPulse {
        0%, 100% { box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4); }
        50% { box-shadow: 0 4px 25px rgba(37, 99, 235, 0.6); }
    }

    /* 遮罩层 */
    .mobile-filter-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .mobile-filter-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* 底部弹出面板 */
    .mobile-filter-sheet {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 1001;
        background: white;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        max-height: 75vh;
        transform: translateY(100%);
        transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
        display: flex;
        flex-direction: column;
    }

    .mobile-filter-sheet.active {
        transform: translateY(0);
    }

    .sheet-handle {
        width: 36px;
        height: 4px;
        background: #d1d5db;
        border-radius: 2px;
        margin: 0.75rem auto 0;
        flex-shrink: 0;
    }

    .sheet-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.75rem 1.25rem;
        border-bottom: 1px solid var(--border-color);
        flex-shrink: 0;
    }

    .sheet-header h3 {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--text-primary);
    }

    .sheet-close {
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #f3f4f6;
        border: none;
        border-radius: 50%;
        color: var(--text-secondary);
        font-size: 1rem;
        cursor: pointer;
    }

    .sheet-close:active {
        background: #e5e7eb;
    }

    .sheet-body {
        overflow-y: auto;
        flex: 1;
        padding: 0.75rem 1.25rem;
        -webkit-overflow-scrolling: touch;
    }

    .sheet-search {
        margin-bottom: 0.75rem;
    }

    .sheet-search-input {
        width: 100%;
        padding: 0.625rem 0.875rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-full);
        font-size: 0.9rem;
        outline: none;
        background: #f9fafb;
    }

    .sheet-search-input:focus {
        border-color: var(--primary-color);
        background: white;
    }

    .sheet-cat-item {
        border-bottom: 1px solid #f3f4f6;
    }

    .sheet-cat-item:last-child {
        border-bottom: none;
    }

    .sheet-cat-btn {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.875rem 0;
        background: none;
        border: none;
        cursor: pointer;
        font-size: 0.95rem;
        color: var(--text-primary);
        text-align: left;
    }

    .sheet-cat-btn:active {
        background: #f9fafb;
    }

    .sheet-cat-btn.active {
        color: var(--primary-color);
    }

    .sheet-cat-name {
        flex: 1;
        font-weight: 500;
    }

    .sheet-cat-count {
        color: var(--text-light);
        font-size: 0.8rem;
    }

    .sheet-cat-arrow {
        font-size: 0.7rem;
        color: var(--text-light);
        transition: transform 0.2s ease;
    }

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

    .sheet-sub-list {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .sheet-cat-item.open .sheet-sub-list {
        max-height: 500px;
    }

    .sheet-sub-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.625rem 0.625rem 0.625rem 1rem;
        font-size: 0.875rem;
        color: var(--text-secondary);
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }

    .sheet-sub-item:active,
    .sheet-sub-item.active {
        background: rgba(37, 99, 235, 0.08);
        color: var(--primary-color);
    }

    .sheet-sub-count {
        font-size: 0.75rem;
        color: var(--text-light);
    }

    .sheet-reset-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        width: 100%;
        padding: 0.75rem;
        margin-top: 0.5rem;
        background: #f9fafb;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        font-size: 0.9rem;
        color: var(--text-secondary);
        cursor: pointer;
    }

    .sheet-reset-btn:active {
        background: #f3f4f6;
    }

    /* 产品网格 */
    .products-content {
        padding: 0;
    }

    .products-toolbar {
        display: none;
    }

    .back-to-top {
        display: none;
    }

    .contact {
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.85) 100%);
    }

    .product-actions {
        display: none;
    }

    .products-count {
        font-size: 0.85rem;
    }

    .products-sort {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .sort-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        padding: 0 0.5rem;
    }

    .product-card {
        border-radius: var(--radius-md);
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    }

    .product-card:hover {
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    }

    .product-image-wrapper {
        aspect-ratio: 1 / 1;
        height: auto;
        margin-bottom: 0;
    }

    .product-content {
        padding: 0.5rem 0.625rem 0.625rem;
    }

    .product-name {
        font-size: 0.8rem;
        line-height: 1.3;
        margin-bottom: 0;
        min-height: auto;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 分页 */
    .products-pagination {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 1rem;
    }

    .page-btn {
        min-width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }

    /* 区域标题 */
    .section {
        padding: 2rem 0;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .section-title p {
        font-size: 0.9rem;
    }

    /* 功能区域 */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-card {
        padding: 1.25rem;
    }

    .feature-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .feature-card h3 {
        font-size: 1rem;
    }

    .feature-card p {
        font-size: 0.85rem;
    }

    /* 联系表单 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-info {
        padding: 1.25rem;
    }

    .contact-info h3 {
        font-size: 1.25rem;
    }

    .contact-form {
        padding: 1.25rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }

    .form-group label {
        font-size: 0.9rem;
        margin-bottom: 0.4rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 0.75rem;
        font-size: 0.95rem;
    }

    .form-row {
        flex-direction: column;
        gap: 1rem;
    }

    .submit-btn {
        width: 100%;
        padding: 0.875rem;
        font-size: 0.95rem;
    }

    /* 页脚 */
    .footer {
        padding: 2rem 0 1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-section h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    .footer-section p,
    .footer-section li {
        font-size: 0.85rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
        padding-top: 1rem;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .footer-links a {
        font-size: 0.8rem;
    }

    /* 加载动画 */
    .spinner {
        width: 40px;
        height: 40px;
    }
}

/* 超小屏幕适配 (480px以下) */
@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    /* 导航栏 */
    .header .container {
        min-height: 56px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .lang-btn {
        padding: 0.35rem 0.5rem;
        font-size: 0.75rem;
    }

    .lang-dropdown {
        min-width: 110px;
        right: -10px;
    }

    .flag-img {
        width: 18px;
        height: 13px;
    }

    /* 英雄区域 */
    .hero {
        padding: 70px 0 1.5rem;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .hero-title span {
        font-size: 1.8rem;
    }

    .hero-description {
        font-size: 0.85rem;
        margin-bottom: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 0.7rem 1.25rem;
        font-size: 0.85rem;
    }

    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.75rem;
        margin-top: 1rem;
    }

    .stat-item {
        padding: 0.625rem 0.875rem;
        min-width: 90px;
        flex: 1;
    }

    .stat-number {
        font-size: 1.25rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    /* 搜索栏 */
    .search-box-wrapper {
        padding: 0.75rem;
        margin: 0.75rem 0;
    }

    .search-input {
        padding: 0.6rem 0.75rem;
        font-size: 0.9rem;
    }

    .search-btn {
        padding: 0.6rem;
        font-size: 0.85rem;
    }

    .search-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    /* 产品侧边栏（已隐藏，不需要样式） */

    /* 底部筛选按钮缩小 */
    .mobile-filter-fab {
        bottom: 1rem;
        right: 0.75rem;
        padding: 0.625rem 1rem;
        font-size: 0.85rem;
    }

    /* 产品网格 */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.375rem;
        padding: 0 0.375rem;
    }

    .product-card {
        border-radius: var(--radius-sm);
    }

    .product-content {
        padding: 0.375rem 0.5rem 0.5rem;
    }

    .product-name {
        font-size: 0.75rem;
        line-height: 1.25;
    }

    .product-badge {
        font-size: 0.6rem;
        padding: 0.1rem 0.35rem;
    }

    /* 分页 */
    .products-pagination {
        gap: 0.35rem;
        padding: 0.75rem;
    }

    .page-btn {
        min-width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    /* 功能区域 */
    .feature-card {
        padding: 1rem;
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .feature-card h3 {
        font-size: 0.95rem;
    }

    .feature-card p {
        font-size: 0.8rem;
    }

    /* 联系表单 */
    .contact-info {
        padding: 1rem;
    }

    .contact-form {
        padding: 1rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 0.6rem 0.75rem;
        font-size: 0.9rem;
    }

    .submit-btn {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    /* 页脚 */
    .footer {
        padding: 1.5rem 0 1rem;
    }

    .footer-content {
        gap: 1.25rem;
    }

    .footer-section h3 {
        font-size: 0.95rem;
    }

    .footer-section p,
    .footer-section li {
        font-size: 0.8rem;
    }

    .footer-links {
        gap: 0.5rem;
    }

    .footer-links a {
        font-size: 0.75rem;
    }
}

/* ============================================
   动画效果
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #e5e7eb;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 消息提示动画 */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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