/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", "Heiti SC", sans-serif;
}
a {
    text-decoration: none;
    color: inherit;
}
ul, ol {
    list-style: none;
}
.container {
    width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
@media (max-width: 1200px) {
    .container {
        width: 100%;
    }
}

/* 导航栏样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
}
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: #165DFF; /* 科技蓝 */
}
.nav-logo { width: auto; display: block; }
.nav-list {
    display: flex;
    gap: 40px;
}
.nav-item {
    font-size: 16px;
    color: #333;
    transition: color 0.3s;
}
.nav-item:hover {
    color: #165DFF;
}
.nav-btn {
    padding: 10px 20px;
    background-color: #FF7D00; /* 暖橙色 */
    color: #fff;
    border-radius: 4px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}
.nav-btn:hover {
    background-color: #FF9500;
}
/* 下拉菜单 */
.dropdown { position: relative; }
.dropdown::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: -20px;
    right: -20px;
    height: 10px;
    z-index: 1;
}
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    min-width: 160px;
    padding: 8px 0;
    margin-top: 8px;
}
.dropdown-menu::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: #fff;
}
.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: #333;
    transition: all 0.2s;
}
.dropdown-menu a:hover { background: #f0f4ff; color: #165DFF; }
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}
.dropdown-toggle::after {
    content: "\25BC";
    font-size: 10px;
    color: #999;
    transition: transform 0.2s;
}
.dropdown:hover .dropdown-toggle::after { transform: rotate(180deg); }

.mobile-nav {
    display: none;
    cursor: pointer;
}
@media (max-width: 768px) {
    .nav-list, .nav-btn {
        display: none;
    }
    .mobile-nav {
        display: block;
        font-size: 24px;
        color: #333;
    }
}

/* ── 移动端菜单覆盖层 ── */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
}
.mobile-menu-overlay.active { display: block; }
.mobile-menu-panel {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100%;
    background: #fff;
    z-index: 1001;
    transition: right 0.3s ease;
    padding: 24px 0;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    overflow-y: auto;
}
.mobile-menu-panel.active { right: 0; }
.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    color: #333;
    cursor: pointer;
    padding: 4px;
}
.mobile-menu-close:hover { color: #165DFF; }
.mobile-menu-list { margin-top: 60px; }
.mobile-menu-list a {
    display: block;
    padding: 16px 24px;
    font-size: 16px;
    color: #333;
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.2s;
}
.mobile-menu-list a:hover { background: #f0f4ff; color: #165DFF; }
.mobile-menu-sub a {
    padding: 12px 24px 12px 44px;
    font-size: 14px;
    color: #666;
    border-bottom: 1px solid #f5f5f5;
}
.mobile-menu-btn {
    display: block;
    text-align: center;
    margin: 24px 24px 0;
    padding: 14px 0;
    background: #FF7D00;
    color: #fff !important;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}
.mobile-menu-btn:hover { background: #FF9500; color:#fff !important; }
@media (min-width: 769px) {
    .mobile-menu-overlay,
    .mobile-menu-panel { display: none !important; }
}

/* Hero区样式 */
.hero {
    margin-top: 80px;
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7ff 0%, #eaf0ff 100%);
    text-align: center;
}
.hero-title {
    font-size: 48px;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.2;
}
.hero-subtitle {
    font-size: 18px;
    color: #666;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.6;
}
.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.hero-btn1 {
    padding: 14px 32px;
    background-color: #165DFF;
    color: #fff;
    border-radius: 4px;
    font-size: 18px;
    transition: background-color 0.3s;
}
.hero-btn1:hover {
    background-color: #0F4CD1;
}
.hero-btn2 {
    padding: 14px 32px;
    background-color: #fff;
    color: #165DFF;
    border: 1px solid #165DFF;
    border-radius: 4px;
    font-size: 18px;
    transition: background-color 0.3s;
}
.hero-btn2:hover {
    background-color: #f5f7ff;
}
.hero-btn3 {
    padding: 14px 32px;
    background: linear-gradient(135deg, #FF7D00, #FF9500);
    color: #fff;
    border-radius: 30px;
    font-size: 18px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(255,125,0,0.3);
}
.hero-btn3:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,125,0,0.4);
}
.hero-img {
    margin-top: 60px;
    max-width: 800px;
    width: 100%;
    border: none;
}
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    .hero-subtitle {
        font-size: 16px;
    }
    .hero-btns {
        flex-direction: column;
        gap: 15px;
        padding: 0 20px;
    }
}

/* 核心优势样式 */
.advantage {
    padding: 80px 0;
}
.section-title {
    font-size: 36px;
    color: #333;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}
.section-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 4px;
    background-color: #165DFF;
    margin: 15px auto 0;
}
.advantage-list {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}
.advantage-item {
    flex: 1;
    min-width: 300px;
    padding: 40px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    text-align: center;
}
.advantage-icon {
    font-size: 48px;
    color: #165DFF;
    margin-bottom: 20px;
}
.advantage-title {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
}
.advantage-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}
@media (max-width: 768px) {
    .advantage-list {
        flex-direction: column;
        gap: 20px;
    }
    .section-title {
        font-size: 28px;
    }
}

/* 场景速览样式 */
.scene {
    padding: 80px 0;
    background-color: #f9fafb;
}
.scene-list {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}
.scene-item {
    flex: 1 1 calc(50% - 15px);
    max-width: calc(50% - 15px);
    border-radius: 8px;
    overflow: hidden;
    background-color: #fff;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}
.scene-img {
    width: 100%;
    object-fit: contain;
    background: #f5f7ff;
}
.scene-content {
    padding: 30px;
}
.scene-title {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
}
.scene-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}
@media (max-width: 768px) {
    .scene-item {
        flex: 1 1 100% !important;
        max-width: 100% !important;
    }
}

/* 核心产品样式 */
.product {
    padding: 80px 0;
}
.product-container {
    display: flex;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}
.product-img {
    flex: 1;
    min-width: 300px;
}
.product-img img {
    width: 100%;
    border-radius: 8px;
}
.product-content {
    flex: 1;
    min-width: 300px;
}
.product-subtitle {
    font-size: 18px;
    color: #165DFF;
    margin-bottom: 10px;
}
.product-title {
    font-size: 32px;
    color: #333;
    margin-bottom: 20px;
}
.product-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}
.product-feature {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.feature-icon {
    color: #165DFF;
    font-size: 18px;
}

/* 合作生态样式 */
.cooperation {
    padding: 80px 0;
    background-color: #f9fafb;
}
.cooperation-container {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}
.cooperation-desc {
    font-size: 18px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 40px;
}
.cooperation-type {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 40px;
}
.cooperation-item {
    flex: 1;
    min-width: 250px;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    text-align: left;
}
.cooperation-item-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 15px;
}
.cooperation-item-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}

/* 关于我们样式 */
.about {
    padding: 80px 0;
}
.about-container {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    align-items: center;
}
.about-content {
    flex: 1;
    min-width: 300px;
}
.about-img {
    flex: 1;
    min-width: 300px;
}
.about-img img {
    width: 100%;
    border-radius: 8px;
}
.about-title {
    font-size: 32px;
    color: #333;
    margin-bottom: 20px;
}
.about-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}
.about-mission {
    font-size: 18px;
    color: #333;
    font-weight: 600;
    margin-top: 30px;
}

/* 新闻动态样式 */
.news {
    padding: 80px 0;
    background-color: #f9fafb;
}
.news-list {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}
.news-item {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}
.news-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.news-content {
    padding: 25px;
}
.news-date {
    font-size: 14px;
    color: #999;
    margin-bottom: 10px;
}
.news-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
    transition: color 0.3s;
}
.news-title:hover {
    color: #165DFF;
}
.news-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 联系我们样式 */
.contact {
    padding: 80px 0;
}
.contact-container {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}
.contact-form {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}
.form-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 30px;
}
.form-group {
    margin-bottom: 20px;
}
.form-label {
    display: block;
    font-size: 16px;
    color: #333;
    margin-bottom: 8px;
}
.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #eee;
    border-radius: 4px;
    font-size: 16px;
    color: #333;
}
.form-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #eee;
    border-radius: 4px;
    font-size: 16px;
    color: #333;
    min-height: 120px;
    resize: vertical;
}
.form-btn {
    width: 100%;
    padding: 14px 0;
    background-color: #165DFF;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
}
.form-btn:hover {
    background-color: #0F4CD1;
}
.contact-info {
    flex: 1;
    min-width: 300px;
}
.contact-info-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 30px;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}
.contact-icon {
    font-size: 24px;
    color: #165DFF;
}
.contact-text {
    font-size: 16px;
    color: #666;
}
.wechat-qrcode {
    margin-top: 30px;
}
.wechat-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}
.qrcode-img {
    width: 150px;
    height: 150px;
    border: 1px solid #eee;
    padding: 10px;
}

/* 页脚样式 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
}
.footer-container {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.footer-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}
.footer-desc {
    font-size: 14px;
    color: #ccc;
    line-height: 1.6;
    max-width: 300px;
}
.footer-column {
    flex: 1;
    min-width: 200px;
}
.footer-column-title {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-column-title::after {
    content: "";
    display: block;
    width: 40px;
    height: 2px;
    background-color: #165DFF;
    position: absolute;
    bottom: 0;
    left: 0;
}
.footer-link {
    display: block;
    font-size: 14px;
    color: #ccc;
    margin-bottom: 10px;
    transition: color 0.3s;
}
.footer-link:hover {
    color: #fff;
}
.footer-copyright {
    text-align: center;
    font-size: 14px;
    color: #999;
    padding-top: 30px;
    border-top: 1px solid #444;
}

/* 悬浮咨询按钮 */
.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #FF7D00;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 15px rgba(255,125,0,0.3);
    cursor: pointer;
    z-index: 998;
    transition: transform 0.3s;
}
.floating-btn:hover {
    transform: scale(1.1);
}