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

:root {
    --primary-color: #0066cc;
    --primary-dark: #004d99;
    --secondary-color: #00d4aa;
    --accent-color: #ff6b35;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    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, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-logo {
    height: 45px;
    width: auto;
    display: block;
}

.nav-brand i {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== 首页横幅 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

/* 轮播容器 */
.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
}

/* 单个轮播项 */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.95;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

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

/* 轮播指示器 */
.slider-dots {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(0, 102, 204, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot:hover {
    background: rgba(0, 102, 204, 0.8);
}

.dot.active {
    width: 36px;
    border-radius: 6px;
    background: #0066cc;
}

/* 轮播箭头 */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(0, 102, 204, 0.25);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    color: #0066cc;
    font-size: 20px;
    border: 2px solid rgba(0, 102, 204, 0.4);
}

.slider-arrow:hover {
    background: rgba(0, 102, 204, 0.4);
    border-color: rgba(0, 102, 204, 0.6);
    transform: translateY(-50%) scale(1.1);
}

.slider-arrow-prev {
    left: 30px;
}

.slider-arrow-next {
    right: 30px;
}

.hero-content {
    text-align: center;
    color: white;
    margin-top: 180px;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #0066cc;
    text-shadow: 2px 2px 8px rgba(255,255,255,0.9), 0 0 20px rgba(255,255,255,0.7);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: #0055aa;
    text-shadow: 1px 1px 6px rgba(255,255,255,0.9), 0 0 15px rgba(255,255,255,0.6);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 14px 36px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255,255,255,0.3);
}

.btn-secondary {
    background: transparent;
    color: #0066cc;
    border: 2px solid #0066cc;
    text-shadow: 1px 1px 4px rgba(255,255,255,0.8);
}

.btn-secondary:hover {
    background: #0066cc;
    color: white;
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    width: 100%;
    text-align: center;
}

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

.hero-features {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
    width: 100%;
    position: relative;
    z-index: 1;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: white;
    animation: fadeInUp 1s ease 0.3s backwards;
}

.feature-item i {
    font-size: 36px;
    opacity: 0.9;
}

.feature-item span {
    font-size: 14px;
    opacity: 0.8;
}

/* ==================== 通用区块样式 ==================== */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 42px;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 18px;
    margin-bottom: 60px;
}

/* ==================== 核心优势 ==================== */
.advantages {
    background: var(--bg-white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 16px;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-icon i {
    font-size: 36px;
    color: white;
}

.advantage-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.advantage-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

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

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 12px 30px;
    border: none;
    background: white;
    color: var(--text-light);
    font-size: 16px;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

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

.product-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.product-content.active {
    display: block;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.product-image {
    height: 280px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 20px;
}

.product-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.product-placeholder {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder i {
    font-size: 48px;
    color: white;
}

.product-info {
    padding: 30px;
}

.product-info h3 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.product-tag {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    margin-bottom: 20px;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.product-features i {
    color: var(--secondary-color);
}

.product-specs {
    background: var(--bg-light);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.product-specs h4 {
    font-size: 14px;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.product-specs p {
    font-size: 13px;
    color: var(--text-light);
}

/* ==================== 解决方案 ==================== */
.solutions {
    background: var(--bg-white);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    align-items: start;
}

.solution-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.solution-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.solution-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.solution-icon i {
    font-size: 32px;
    color: white;
}

.solution-header h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin: 0;
    line-height: 1.3;
}

.solution-pain {
    background: #fff5f5;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid #ef4444;
    min-height: 120px;
    display: flex;
    flex-direction: column;
}

.solution-pain h4 {
    font-size: 14px;
    color: #ef4444;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.solution-pain p {
    color: var(--text-light);
    line-height: 1.4;
    margin: 0;
    font-size: 13px;
}

.solution-solve {
    background: #f0fdf4;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid #10b981;
    min-height: 180px;
    display: flex;
    flex-direction: column;
}

.solution-solve h4 {
    font-size: 14px;
    color: #10b981;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.solution-solve ul {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
}

.solution-solve li {
    padding: 8px 0;
    color: var(--text-dark);
    line-height: 1.4;
    border-bottom: 1px solid #d1fae5;
    font-size: 13px;
}

.solution-solve li:last-child {
    border-bottom: none;
}

.solution-solve strong {
    color: var(--primary-color);
    font-weight: 600;
}

.solution-value {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.solution-value h4 {
    font-size: 15px;
    color: var(--primary-color);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.value-item {
    text-align: center;
    background: white;
    padding: 15px 10px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.value-label {
    display: block;
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 6px;
}

.value-data {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.value-desc {
    display: block;
    font-size: 11px;
    color: var(--text-light);
    line-height: 1.3;
}

/* ==================== 数据统计 ==================== */
.stats {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-feature i {
    font-size: 24px;
    color: var(--primary-color);
}

.about-feature span {
    font-weight: 500;
    color: var(--text-dark);
}

.about-image {
    height: 400px;
}

.about-company-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.about-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-placeholder i {
    font-size: 80px;
    color: white;
    opacity: 0.3;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 24px;
    color: var(--primary-color);
}

.contact-details h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.contact-details p {
    color: var(--text-light);
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
}

/* ==================== 联系客服按钮 ==================== */
.contact-service-btn {
    display: flex;
    gap: 20px;
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 12px;
    padding: 15px 20px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.contact-service-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.contact-service-btn .contact-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.contact-service-btn .contact-details h4,
.contact-service-btn .contact-details p {
    color: white;
}

/* ==================== 联系客服弹出框 ==================== */
.service-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.service-modal.active {
    display: block;
}

.service-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.service-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 20px;
    padding: 40px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideInUp 0.4s ease;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.service-modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-light);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
}

.service-modal-close:hover {
    background: var(--primary-color);
    color: white;
}

.service-modal-body {
    text-align: center;
}

.service-modal-body h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-modal-text {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 10px;
}

.service-modal-phone {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-modal-qr-text {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.service-modal-qr {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.service-modal-qr img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ==================== 页脚 ==================== */
.footer {
    background: #1a1a2e;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
}

.footer-section p {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
}

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

.back-to-top i {
    font-size: 20px;
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }

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

    .about-image {
        height: 300px;
    }

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

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

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

@media (max-width: 768px) {
    .nav-logo {
        height: 38px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .hero-features {
        gap: 30px;
    }

    section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 32px;
    }

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

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

    .value-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }

    .section-title {
        font-size: 26px;
    }

    /* 轮播响应式 */
    .slider-dots {
        bottom: 80px;
        gap: 8px;
    }

    .dot {
        width: 10px;
        height: 10px;
    }

    .dot.active {
        width: 30px;
    }

    .slider-arrow {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .slider-arrow-prev {
        left: 15px;
    }

    .slider-arrow-next {
        right: 15px;
    }

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

    .contact-form {
        padding: 25px;
    }
}