/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --secondary-color: #34d399;
    --accent-color: #6ee7b7;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(16, 185, 129, 0.1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(16, 185, 129, 0.15);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    transition: padding 0.3s ease;
}

.navbar.scrolled .container {
    padding: 0.75rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.nav-brand:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(52, 211, 153, 0.1));
    border-radius: 14px;
    padding: 10px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 12px rgba(16, 185, 129, 0.12);
    border: 1.5px solid rgba(16, 185, 129, 0.15);
}

.logo-icon svg {
    width: 32px;
    height: 32px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-brand:hover .logo-icon {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
    border-color: rgba(16, 185, 129, 0.25);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.15));
}

.nav-brand:hover .logo-icon svg {
    transform: scale(1.05);
}

.logo-text-wrapper {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    gap: 0.5rem;
    line-height: 1;
}

.nav-brand .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color); /* Fallback color */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
    letter-spacing: -0.5px;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.nav-brand .logo-text-cn {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color); /* Fallback color - 确保即使渐变不支持也显示绿色 */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
    letter-spacing: 2px;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* 确保在不支持background-clip的浏览器中显示绿色 */
@supports not (-webkit-background-clip: text) {
    .nav-brand .logo-text,
    .nav-brand .logo-text-cn {
        color: var(--primary-color) !important;
        -webkit-text-fill-color: var(--primary-color) !important;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1.25rem;
    border-radius: 10px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: block;
    overflow: hidden;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(52, 211, 153, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 10px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.nav-menu a:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-menu a:hover::before {
    opacity: 1;
}

.nav-menu a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-menu a.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(52, 211, 153, 0.1));
}

.nav-menu a.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* 导航栏二级菜单 */
.nav-item.has-submenu {
    position: relative;
}

.nav-item.has-submenu > a {
    padding-right: 1.75rem;
}

.nav-item.has-submenu > a::after {
    /* 保持底部高亮线，避免与下拉箭头冲突，箭头用单独元素实现时可调整 */
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    padding: 0.5rem 0.25rem;
    margin-top: 0.5rem;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 1002;
}

.submenu li {
    position: relative;
}

.submenu a {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
}

.submenu a::after {
    display: none;
}

.submenu a::before {
    border-radius: 8px;
}

.submenu a:hover {
    color: var(--primary-color);
    transform: translateY(0);
}

.nav-item.has-submenu:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    z-index: 1001;
}

.hamburger:hover {
    background: rgba(16, 185, 129, 0.1);
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
    background: var(--primary-color);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
    background: var(--primary-color);
}

/* 导航栏下方全屏区域 */
.nav-fullscreen {
    position: fixed;
    top: 70px; /* 导航栏高度，位于导航栏下方 */
    left: 0;
    right: 0;
    width: 100%;
    height: calc(100vh - 70px); /* 视口高度减去导航栏高度，填满剩余空间 */
    z-index: 997; /* 在内容之上，但低于导航栏 */
    overflow: hidden;
    background: var(--bg-light);
    display: none; /* 默认隐藏，需要时通过JavaScript显示 */
}

.nav-fullscreen.active {
    display: block;
}

.nav-fullscreen-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow-y: auto;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(52, 211, 153, 0.05));
}

/* Hero区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    overflow: hidden;
}

/* 二级页面 Hero（稍小） */
.product-hero {
    min-height: 60vh;
    padding-top: 100px;
}

.product-hero .hero-description {
    max-width: 720px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(135deg, rgba(16, 185, 129, 0.9) 0%, rgba(5, 150, 105, 0.9) 50%, rgba(4, 120, 87, 0.9) 100%),
        url('https://images.unsplash.com/photo-1416879595882-3373a0480b5b?w=1920&h=1080&fit=crop') center/cover;
    z-index: -1;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(5, 150, 105, 0.3) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
    font-size: 4.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.title-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 2px;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
    cursor: pointer;
}

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

.btn-outline {
    background: transparent;
    color: white;
    border-color: white;
    padding: 0.75rem 1.5rem;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: white;
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
}

/* 通用区块样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 关于我们 */
.about {
    background: var(--bg-white);
}

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

.about-text h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

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

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

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

/* 核心优势 */
.features {
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 产品中心 */
.products {
    background: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-content {
    padding: 1.5rem;
}

.product-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.product-content > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.product-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.product-features li {
    background: var(--bg-light);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 产品详情 */
.product-details {
    background: var(--bg-light);
}

.product-detail {
    margin-bottom: 5rem;
    padding: 3rem;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    position: relative;
}

.product-more-info {
    margin-bottom: 1.5rem;
    text-align: right;
    padding-right: 0;
    position: relative;
    z-index: 10;
    display: block;
    width: 100%;
}

@media (max-width: 768px) {
    .product-more-info {
        text-align: center;
        margin-bottom: 1rem;
    }
}

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

.product-detail-image {
    position: relative;
    z-index: 1;
}

.btn-more-info {
    display: inline-flex !important;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #10b981, #34d399) !important; /* 使用具体颜色值作为fallback */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white !important;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    position: relative;
    z-index: 10;
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-more-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    gap: 0.75rem;
}

.product-detail:last-child {
    margin-bottom: 0;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.product-detail-content.reverse {
    direction: rtl;
}

.product-detail-content.reverse > * {
    direction: ltr;
}

.product-detail-image {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.product-detail-image img {
    width: 100%;
    height: auto;
    display: block;
}

.product-detail-text h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.product-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.product-detail-text > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.product-detail-text h4 {
    font-size: 1.25rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-primary);
}

.product-detail-text ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.product-detail-text ul li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}

.product-detail-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.product-detail-text ul li strong {
    color: var(--text-primary);
}

/* 联系我们 */
.contact {
    background: var(--bg-white);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: linear-gradient(180deg, #1f2937 0%, #111827 100%);
    color: white;
    padding: 5rem 0 2rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.5), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo-wrapper {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.footer-section h3 {
    font-size: 1.75rem;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo-cn {
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.875rem;
}

.footer-contact-info {
    margin-bottom: 1.5rem;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--primary-color);
}

.footer-section h4 {
    font-size: 1.125rem;
    margin-bottom: 1.25rem;
    color: white;
    font-weight: 600;
}

.footer-section h5 {
    font-size: 1rem;
    margin: 1.5rem 0 0.75rem;
    color: white;
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.6;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section ul li a::before {
    content: '→';
    opacity: 0;
    transform: translateX(-5px);
    transition: all 0.3s ease;
    color: var(--primary-color);
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-section ul li a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.social-links {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.social-link {
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transform: translateY(-3px) scale(1.05);
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.footer-subscribe-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.footer-subscribe-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.footer-subscribe-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-size: 0.875rem;
    outline: none;
    transition: all 0.3s ease;
}

.footer-subscribe-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.footer-subscribe-form input:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

.footer-subscribe-form button {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.footer-subscribe-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.footer-hours p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
}

.footer-bottom {
    padding-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-icp {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

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

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

.footer-links span {
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.875rem;
}

/* 季节推荐 */
.seasonal {
    background: var(--bg-light);
    padding: 80px 0;
}

.seasonal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.seasonal-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.seasonal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    transition: height 0.3s ease;
}

.seasonal-card.spring::before {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
}

.seasonal-card.summer::before {
    background: linear-gradient(90deg, #f97316, #ea580c);
}

.seasonal-card.autumn::before {
    background: linear-gradient(90deg, #d97706, #b45309);
}

.seasonal-card.winter::before {
    background: linear-gradient(90deg, #60a5fa, #3b82f6);
}

.seasonal-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.seasonal-card:hover::before {
    height: 100%;
    opacity: 0.05;
}

.seasonal-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.seasonal-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.seasonal-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.seasonal-card ul {
    list-style: none;
    text-align: left;
}

.seasonal-card ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.seasonal-card ul li::before {
    content: '🌱';
    position: absolute;
    left: 0;
}

/* 客户案例 */
.cases {
    background: var(--bg-white);
    padding: 80px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.case-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.case-image {
    height: 250px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.1);
}

.case-content {
    padding: 2rem;
}

.case-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.case-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.case-content > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.case-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.case-features span {
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 知识库 */
/* 知识库 */
.knowledge {
    background: var(--bg-light);
    padding: 80px 0;
}

/* 知识分类导航 */
.knowledge-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.category-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    border-radius: 25px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    z-index: 1;
    font-family: inherit;
    outline: none;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: left 0.3s ease;
    z-index: -1;
}

.category-btn:hover {
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.category-btn:hover::before {
    left: 0;
}

.category-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.category-btn.active::before {
    left: 0;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.knowledge-card {
    opacity: 1;
    transform: scale(1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.knowledge-card.hidden {
    opacity: 0;
    transform: scale(0.9);
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    pointer-events: none;
}

.knowledge-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.knowledge-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.knowledge-image {
    height: 200px;
    overflow: hidden;
}

.knowledge-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.knowledge-card:hover .knowledge-image img {
    transform: scale(1.1);
}

.knowledge-content {
    padding: 1.5rem;
}

.knowledge-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.knowledge-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.knowledge-content > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.875rem;
}

.knowledge-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.knowledge-date,
.knowledge-views {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.knowledge-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.knowledge-link:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

/* 服务流程 */
.process {
    background: var(--bg-white);
    padding: 80px 0;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 0;
}

.process-step {
    position: relative;
    z-index: 1;
    text-align: center;
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.process-step:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 2rem auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.step-icon svg {
    width: 40px;
    height: 40px;
}

.process-step h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.process-step p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .logo-icon {
        width: 40px;
        height: 40px;
        padding: 8px;
    }

    .logo-icon svg {
        width: 26px;
        height: 26px;
    }

    .nav-brand .logo-text {
        font-size: 1.25rem;
    }

    .nav-brand .logo-text-cn {
        font-size: 1.25rem;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        width: 100%;
        padding: 2rem;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        gap: 0.5rem;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

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

    .nav-menu li {
        opacity: 0;
        transform: translateX(-20px);
        animation: slideInNav 0.4s ease forwards;
    }

    .nav-menu.active li:nth-child(1) { animation-delay: 0.1s; }
    .nav-menu.active li:nth-child(2) { animation-delay: 0.15s; }
    .nav-menu.active li:nth-child(3) { animation-delay: 0.2s; }
    .nav-menu.active li:nth-child(4) { animation-delay: 0.25s; }
    .nav-menu.active li:nth-child(5) { animation-delay: 0.3s; }

    @keyframes slideInNav {
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    .nav-menu a {
        padding: 1rem 1.5rem;
        border-radius: 12px;
        margin-bottom: 0.5rem;
    }

    .nav-menu a::after {
        display: none;
    }

    /* 移动端下二级菜单作为缩进项直接展示 */
    .nav-item.has-submenu {
        width: 100%;
    }

    .nav-item.has-submenu > a {
        padding-left: 1.5rem;
    }

    .nav-item.has-submenu .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        padding: 0;
        margin: 0 0 0.5rem 0;
    }

    .nav-item.has-submenu .submenu a {
        padding-left: 2.5rem;
        font-size: 0.875rem;
    }

    .title-line {
        font-size: 2.5rem;
    }

    .title-subtitle {
        font-size: 1.125rem;
    }

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

    .about-content,
    .contact-content,
    .product-detail-content {
        grid-template-columns: 1fr;
    }

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

    .section-title {
        font-size: 2rem;
    }

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

    .seasonal-grid,
    .cases-grid,
    .knowledge-grid {
        grid-template-columns: 1fr;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .process-steps::before {
        display: none;
    }

    .step-number {
        position: relative;
        top: 0;
        left: 0;
        transform: none;
        margin: 0 auto 1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .footer-subscribe-form {
        flex-direction: column;
    }

    .footer-subscribe-form button {
        width: 100%;
    }

    .social-links {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .logo-icon {
        width: 38px;
        height: 38px;
        padding: 7px;
    }

    .logo-icon svg {
        width: 24px;
        height: 24px;
    }

    .nav-brand .logo-text {
        font-size: 1.1rem;
    }

    .nav-brand .logo-text-cn {
        font-size: 1.1rem;
    }

    .nav-brand {
        gap: 0.625rem;
    }

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

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

    .btn {
        width: 100%;
        text-align: center;
    }

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

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

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-subscribe-form {
        flex-direction: column;
    }

    .footer-subscribe-form button {
        width: 100%;
    }
}