/* ==================== 全局样式 ==================== */
:root {
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-color: #f5576c;
    --text-color: #333;
    --text-light: #666;
    --text-muted: #999;
    --bg-light: #f8f9fa;
    --white: #fff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

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

ul {
    list-style: none;
}

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

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

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

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

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

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

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.nav-list {
    display: flex;
    gap: 35px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    font-size: 15px;
    color: var(--text-color);
    padding: 8px 0;
    display: block;
}

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

.nav-item.active > a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-gradient);
}

/* 下拉菜单 */
.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    min-width: 180px;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    margin-top: 10px;
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    margin-top: 0;
}

.dropdown li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-light);
}

.dropdown li a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.phone-icon {
    font-size: 18px;
}

.phone-number {
    font-weight: 600;
    color: var(--primary-color);
}

.header-btns {
    display: flex;
    gap: 10px;
}

.header-btns .btn {
    padding: 8px 20px;
    font-size: 13px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-color);
    transition: var(--transition);
}

/* ==================== Hero 轮播 ==================== */
.hero {
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero-swiper {
    height: 500px;
    width: 100%;
}

.hero-swiper .swiper-wrapper {
    height: 100%;
}

.hero-swiper .swiper-slide {
    height: 100%;
    overflow: hidden;
}

.hero-content {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

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

.hero-content .container {
    position: relative;
    z-index: 3;
}

/* Hero轮播背景 */
.hero-slide-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-slide-1::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background: radial-gradient(circle at 30% 70%, rgba(255,255,255,0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(255,255,255,0.1) 0%, transparent 40%);
}

.hero-slide-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.hero-slide-2::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background: radial-gradient(circle at 80% 80%, rgba(255,255,255,0.15) 0%, transparent 50%),
                radial-gradient(circle at 20% 20%, rgba(255,255,255,0.1) 0%, transparent 40%);
}

.hero-slide-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.hero-slide-3::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background: radial-gradient(circle at 60% 40%, rgba(255,255,255,0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 60%, rgba(255,255,255,0.1) 0%, transparent 40%);
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-content .btn {
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* Swiper 控件样式 */
.hero .swiper-button-prev,
.hero .swiper-button-next {
    width: 44px;
    height: 44px;
    color: var(--white);
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: var(--transition);
}

.hero .swiper-button-prev:hover,
.hero .swiper-button-next:hover {
    background: rgba(255, 255, 255, 0.3);
}

.hero .swiper-button-prev::after,
.hero .swiper-button-next::after {
    font-size: 18px;
    font-weight: bold;
}

.hero .swiper-pagination {
    bottom: 30px !important;
}

.hero .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: var(--white);
    opacity: 0.5;
    transition: var(--transition);
}

.hero .swiper-pagination-bullet-active {
    opacity: 1;
    width: 30px;
    border-radius: 5px;
}

.swiper-button-prev,
.swiper-button-next {
    color: var(--white);
}

.swiper-pagination-bullet {
    background: var(--white);
    opacity: 0.5;
}

.swiper-pagination-bullet-active {
    opacity: 1;
}

/* ==================== 功能亮点 ==================== */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-color);
}

.section-title p {
    font-size: 16px;
    color: var(--text-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.feature-icon {
    width: 100%;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    overflow: hidden;
}

.feature-icon img {
    max-height: 100%;
    object-fit: contain;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.feature-list {
    padding-left: 20px;
}

.feature-list li {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
    position: relative;
    padding-left: 15px;
}

.feature-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ==================== 八大功能模块 ==================== */
.modules {
    padding: 80px 0;
    background: var(--white);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.module-item {
    text-align: center;
    padding: 40px 25px;
    border-radius: var(--border-radius);
    background: var(--bg-light);
    transition: var(--transition);
    cursor: pointer;
}

.module-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.module-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.module-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-color);
}

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

/* ==================== 产品展示 ==================== */
.products {
    padding: 80px 0;
    background: var(--bg-light);
}

.products-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 30px;
    border-radius: 50px;
    font-size: 14px;
    cursor: pointer;
    background: var(--white);
    color: var(--text-light);
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

.products-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: flex;
    align-items: center;
    gap: 50px;
}

.product-info {
    flex: 1;
}

.product-info h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.product-info > p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 25px;
}

.product-info ul {
    margin-bottom: 30px;
}

.product-info ul li {
    font-size: 15px;
    color: var(--text-color);
    margin-bottom: 12px;
}

.product-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.product-image img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

/* ==================== 底部 ==================== */
.footer {
    background: #1a1a2e;
    color: var(--white);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-col ul li a:hover {
    color: var(--white);
}

.contact-phone {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.contact-address {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.qrcode {
    text-align: center;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
}

.qrcode img {
    width: 120px;
    height: 120px;
    margin-bottom: 12px;
    border-radius: 8px;
    background: #fff;
    padding: 8px;
    box-sizing: border-box;
}

.qrcode p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 5px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ==================== 返回顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .tab-content.active {
        flex-direction: column;
    }

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

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .header-right {
        display: none;
    }

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

    .hero-swiper {
        height: 400px;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .section-title h2 {
        font-size: 26px;
    }

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

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

    .products-tabs {
        flex-wrap: wrap;
    }

    .products-content {
        padding: 25px;
    }

    .product-info h3 {
        font-size: 22px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-swiper {
        height: 350px;
    }

    .hero-content h1 {
        font-size: 26px;
    }

    .section-title h2 {
        font-size: 22px;
    }

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

    .module-item {
        padding: 30px 20px;
    }
}