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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f3f4f6;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

/* 导航栏右侧区域 */
.nav-right {
    display: flex;
    align-items: center;
    margin-left: auto;
}

/* 语言切换 */
.language-switch {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin-left: 1.5rem;
}

.language-btn {
    padding: 0.3rem 0.8rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-dark);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.2;
}

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

.language-btn:hover:not(.active) {
    background: var(--bg-light);
    border-color: var(--primary-color);
}

.navbar .container {
    display: flex;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-img {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* 汉堡菜单 */
.burger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.burger div {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* 首页横幅 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path d="M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z" fill="rgba(255,255,255,0.1)"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-content {
    z-index: 1;
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: white;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    animation: fadeInUp 1s ease 0.4s both;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* 产品中心 */
.products {
    padding: 5rem 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.product-categories {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.category {
    animation: fadeInUp 0.8s ease both;
}

.category-title {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid var(--primary-color);
}

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

.product-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.product-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.product-card-link:hover {
    text-decoration: none;
}

.product-card-link .product-card {
    height: 100%;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.view-detail {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.product-card-link:hover .view-detail {
    transform: translateX(5px);
}

.product-card h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.product-card ul {
    list-style: none;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.product-card ul li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
    font-size: 0.9rem;
}

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

.product-card .application {
    font-size: 0.85rem;
    color: var(--text-light);
    padding-top: 0.8rem;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    font-style: italic;
}

/* 解决方案 */
.solutions {
    padding: 5rem 0;
    background: var(--bg-light);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.solution-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

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

.solution-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.solution-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 关于我们 */
.about {
    padding: 5rem 0;
    background: var(--bg-white);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-content > p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.feature {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 联系我们 */
.contact {
    padding: 5rem 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    padding: 2rem;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

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

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

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

.contact-form button {
    align-self: flex-start;
    padding: 1rem 2.5rem;
}

.contact-form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 表单状态消息 */
.form-status {
    display: none;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    font-size: 0.95rem;
    margin-top: 0.5rem;
    animation: fadeIn 0.3s ease;
}

.form-status.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.form-status.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.form-status.warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

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

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    opacity: 0.9;
    margin: 0.5rem 0;
    color: rgba(255, 255, 255, 0.9);
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer a:hover {
    color: white;
    text-decoration: underline;
    opacity: 1;
}

.icp-record {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.icp-record a {
    color: rgba(255, 255, 255, 0.9);
}

.icp-record a:hover {
    color: white;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-right {
        position: relative;
    }

    .nav-links {
        position: fixed;
        right: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
        z-index: 999;
    }

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

    .nav-links li {
        margin: 1.5rem 0;
    }

    .language-switch {
        position: fixed;
        top: 70px;
        right: 0;
        flex-direction: row;
        justify-content: flex-end;
        padding: 0.5rem 1rem;
        background: white;
        z-index: 998;
    }

    .burger {
        display: flex;
    }

    .burger.active .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .burger.active .line2 {
        opacity: 0;
    }

    .burger.active .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

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

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

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

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

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 滚动时导航栏阴影加深 */
.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* 关于我们 - 企业文化板块 */
.about-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: justify;
}

.culture-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.culture-card {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.culture-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.culture-card p {
    color: var(--text-dark);
    line-height: 1.8;
    font-size: 1rem;
}

/* 产品图片样式 */
.product-card-img {
    width: 100%;
    height: 280px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 25px;
    transition: all 0.3s ease;
}

.product-card:hover .product-card-img {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

/* HE06 优化 - 使用更大容器，不 transform */
.product-card-img[src="he06.png"],
.product-card-img[src*="he06.png"] {
    height: 300px;
    padding: 30px;
    background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
}

/* HK100 太阳能优化 - 使用更大容器，不旋转 */
.product-card-img[src="hk100-solar.png"],
.product-card-img[src*="hk100-solar.png"] {
    height: 300px;
    padding: 30px;
    background: linear-gradient(135deg, #ffffff 0%, #fff8f0 100%);
}

/* R12/R11 优化 - 增强对比度，让轮廓更清晰 */
.product-card-img[src="r12.png"],
.product-card-img[src*="r12.png"],
.product-card-img[src="r11.png"],
.product-card-img[src*="r11.png"] {
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.08);
}

/* 产品详情页图片 */
.product-header .product-image {
    width: 100%;
    height: 600px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.06);
}

.product-header .product-image img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    transition: all 0.3s ease;
}

/* 产品详情页 - HE06 优化 */
.product-header .product-image img[src="he06.png"],
.product-header .product-image img[src*="he06.png"] {
    max-width: 70%;
    max-height: 70%;
}

/* 产品详情页 - HK100 太阳能优化 */
.product-header .product-image img[src="hk100-solar.png"],
.product-header .product-image img[src*="hk100-solar.png"] {
    max-width: 75%;
    max-height: 75%;
}

/* 产品详情页 - R12/R11 优化，增强轮廓 */
.product-header .product-image img[src="r12.png"],
.product-header .product-image img[src*="r12.png"],
.product-header .product-image img[src="r11.png"],
.product-header .product-image img[src*="r11.png"] {
    filter: contrast(1.08) brightness(1.03);
}

/* 解决方案详情页产品图片 */
.solution-products-grid .product-card-img {
    height: 180px;
}

/* 解决方案卡片链接 */
.solution-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.solution-card-link:hover {
    text-decoration: none;
}

.solution-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    height: 100%;
}

.solution-card-link:hover .solution-card {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* 企业文化卡片 - 大尺寸 */
.culture-card-large {
    grid-column: span 2;
}

/* 解决方案 - 响应式布局 */
@media (max-width: 1400px) {
    .solution-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-card {
        padding: 1.5rem;
    }
    
    .solution-icon {
        font-size: 2.5rem;
    }
    
    .solution-card h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    .culture-card-large {
        grid-column: span 1;
    }
}