/* ====== 全局基础 ====== */
body {
    margin: 0;
    font-family: "Microsoft YaHei", sans-serif;
    background: #f7f7f7;
    color: #333;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ====== Header ====== */
.it-header {
    background: #0a0a0a;
    color: #fff;
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 999;
}

.it-header-container {
    max-width: 1280px;
    margin: auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.it-logo a {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
}

.it-nav {
    display: flex;
}

.it-nav-list {
    display: flex;
    gap: 28px;
}

.it-nav-list a {
    color: #fff;
    font-size: 15px;
    transition: 0.3s;
}

.it-nav-list a:hover {
    color: #4da3ff;
}

/* 移动端菜单按钮 */
.it-nav-toggle {
    display: none;
    font-size: 26px;
    cursor: pointer;
}

/* ====== Footer ====== */
.it-footer {
    background: #111;
    color: #ccc;
    padding: 40px 0 20px;
    margin-top: 60px;
}

.it-footer-container {
    max-width: 1280px;
    margin: auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
}

.it-footer-col h4 {
    color: #fff;
    margin-bottom: 12px;
}

.it-footer-col ul li {
    margin-bottom: 8px;
}

.it-footer-bottom {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #333;
    font-size: 14px;
}

/* ====== Main 内容区域 ====== */
.it-main {
    max-width: 1280px;
    margin: auto;
    padding: 40px 20px;
}

/* ====== 三端自适应 ====== */

/* --- PC 端（≥1024px） --- */
@media (min-width: 1024px) {
    .it-nav {
        display: flex;
    }
}

/* --- 平板端（768px - 1023px） --- */
@media (max-width: 1023px) {
    .it-nav-list {
        gap: 20px;
    }
}

/* --- 手机端（≤767px） --- */
@media (max-width: 767px) {

    .it-nav {
        display: none;
        flex-direction: column;
        background: #0a0a0a;
        padding: 20px;
    }

    .it-nav.it-nav-open {
        display: flex;
    }

    .it-nav-toggle {
        display: block;
        color: #fff;
    }

    .it-nav-list {
        flex-direction: column;
        gap: 16px;
    }

    .it-footer-container {
        flex-direction: column;
        text-align: center;
    }
}
/*通用结束*/
/* ====== 面包屑导航 ====== */
.it-breadcrumb {
    margin: 20px 0;
    font-size: 14px;
}

.it-breadcrumb ul {
    display: flex;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.it-breadcrumb li {
    color: #666;
}

.it-breadcrumb a {
    color: #0078ff;
    text-decoration: none;
}

.it-breadcrumb li::after {
    content: ">";
    margin: 0 6px;
    color: #999;
}

.it-breadcrumb li:last-child::after {
    content: "";
}

/* ====== 关于我们主体 ====== */
.it-about p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #333;
}

/* ====== 使命与愿景 ====== */
.it-about-mission p {
    font-size: 16px;
    line-height: 1.8;
    background: #f7f7f7;
    padding: 20px;
    border-radius: 8px;
    color: #444;
}

/* ====== 三端自适应 ====== */
@media (max-width: 767px) {
    .it-about p,
    .it-about-mission p {
        font-size: 15px;
    }
}
/* ====== 发展历程时间线 ====== */
.it-timeline {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 30px;
}

.it-timeline-item {
    background: #fff;
    padding: 20px;
    border-left: 4px solid #0078ff;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.it-timeline-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #0078ff;
}

.it-timeline-item p {
    font-size: 15px;
    line-height: 1.6;
    color: #333;
}

/* 手机端优化 */
@media (max-width: 767px) {
    .it-timeline-item {
        padding: 16px;
    }
    .it-timeline-item h3 {
        font-size: 16px;
    }
    .it-timeline-item p {
        font-size: 14px;
    }
}
/* ====== 团队模块 ====== */
.it-team-card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    text-align: center;
}

.it-team-photo {
    width: 100%;
    max-width: 220px;
    border-radius: 50%;
    margin-bottom: 16px;
}

.it-team-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #0078ff;
}

.it-team-card p {
    font-size: 15px;
    line-height: 1.6;
    color: #333;
}

/* 三端自适应 */
@media (max-width: 1023px) {
    .it-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .it-grid-3 {
        grid-template-columns: 1fr;
    }
}
/* ====== 联系我们模块 ====== */
.it-contact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 30px;
}

.it-contact-info,
.it-contact-form,
.it-contact-map {
    background: #fff;
    padding: 24px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.it-contact-info h3,
.it-contact-form h3,
.it-contact-map h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: #0078ff;
}

.it-contact-info p {
    font-size: 15px;
    line-height: 1.6;
}

.it-contact-form label {
    display: block;
    margin-top: 12px;
    font-size: 14px;
    color: #333;
}

.it-contact-form input,
.it-contact-form textarea {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
}

.it-contact-form button {
    margin-top: 16px;
    background: #0078ff;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
}

.it-contact-form button:hover {
    background: #005fcc;
}

.it-map-placeholder {
    background: #f7f7f7;
    padding: 40px;
    text-align: center;
    border-radius: 8px;
    color: #666;
}

/* 三端自适应 */
@media (max-width: 1023px) {
    .it-contact {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .it-contact {
        grid-template-columns: 1fr;
    }
}