/* ==================== Platform System Page Styles ==================== */

/* 隐藏式H1 - 仅SEO可见 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* ===== Banner ===== */
.system-banner {
    background-image: url(../images/platform/pc/pc_banner01.jpg);
}
.system-banner .col-md-12 {
    height: 300px;
}

/* ===== Why Choose Us 区块 ===== */
#why-choose-us {
    padding: 0 !important;
}

/* ===== 面包屑 ===== */
.system-breadcrumb {
    line-height: 50px;
    height: 50px;
    font-size: 14px;
    padding-top: 10px;
    margin-bottom: 20px;
}
.system-breadcrumb a {
    color: #86868b;
    text-decoration: none;
}
.system-breadcrumb span {
    color: #86868b;
    margin: 0 6px;
}
.breadcrumb-current {
    color: #1d1d1f;
    text-decoration: none;
    font-weight: 600;
}

/* ===== 车辆监管系统 介绍区块 ===== */
.system-intro-section {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 40px;
    padding-bottom: 80px;
    padding-left: 0;
    padding-right: 0;
    background: #fff;
}
.system-intro-img {
    width: 65%;
    padding-top: 30px;
}
.system-intro-title {
    font-size: 60px;
    font-weight: 900;
    color: #313131;
    text-align: center;
    text-transform: uppercase;
    position: relative;
    padding-top: 5px;
    padding-bottom: 5px;
}
.system-intro-desc {
    text-align: center;
    margin-bottom: 40px;
    padding-left: 40px;
    padding-right: 40px;
    color: #313131;
    font-size: 16px;
    padding-bottom: 10px;
}
.system-intro-link {
    text-align: center;
}
.system-intro-link a {
    color: #259ad6;
    text-decoration: none;
    font-weight: 900;
}

/* ===== AI+DA 动态背景区块 ===== */
.ai-da-section {
    height: 660px;
    text-align: left;
    margin-bottom: 40px;
    background-image: url(../images/platform/pc/PC_02.jpg);
    position: relative;
    overflow: hidden;
    background-size: cover !important;
    animation: bgScroll 25s ease-in-out infinite;
    color: #ffffff;
}

/* 光效扫描层 */
.ai-da-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: -40%;
    width: 40%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(35, 164, 232, 0.03) 20%,
        rgba(35, 164, 232, 0.08) 50%,
        rgba(35, 164, 232, 0.03) 80%,
        transparent 100%
    );
    animation: lightSweep 8s ease-in-out infinite;
    pointer-events: none;
    z-index: 1;
}

/* 确保文字在动画层之上 */
.ai-da-section > * {
    position: relative;
    z-index: 2;
}

@keyframes bgScroll {
    0%   { background-position: 0% 0%; }
    50%  { background-position: 100% 100%; }
    100% { background-position: 0% 0%; }
}

@keyframes lightSweep {
    0%   { left: -40%; opacity: 0; }
    15%  { opacity: 1; }
    85%  { opacity: 1; }
    100% { left: 140%; opacity: 0; }
}

.ai-da-title-en {
    margin-top: 0;
    margin-bottom: -15px;
    font-size: 80px;
    font-weight: 900;
    color: #ffffff !important;
    text-align: center;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 30px;
    padding-top: 200px;
}
.ai-da-title-cn {
    margin-top: 0;
    margin-bottom: 0px;
    font-size: 45px;
    font-weight: 900;
    color: #ffffff !important;
    text-align: center;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 30px;
}
.ai-da-desc {
    color: #ffffff !important;
    font-size: 16px;
    text-align: center;
    margin-bottom: 40px;
    padding-left: 40px;
    padding-right: 40px;
}

/* ===== 为稳定 区块 ===== */
.system-stable-section {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 40px;
    padding-bottom: 80px;
    padding-left: 0;
    padding-right: 0;
    background: #fff;
}
.system-stable-title {
    margin-top: 45px;
    margin-bottom: 0px;
    font-size: 60px;
    font-weight: 900;
    color: #313131;
    background-color: #fff;
    text-align: center;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 30px;
}
.system-stable-desc {
    background-color: #fff;
    text-align: center;
    margin-bottom: 25px;
    padding-left: 40px;
    padding-right: 40px;
    color: #313131;
    font-size: 16px;
}
.system-stable-img {
    width: 80%;
    margin-bottom: 25px;
}
.system-stable-link {
    text-align: center;
}
.system-stable-link a {
    color: #259ad6;
    text-decoration: none;
    font-weight: 900;
}

/* ===== 丰富的应用 区块 ===== */
.system-app-section {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 40px;
    padding-bottom: 30px;
    padding-left: 0;
    padding-right: 0;
    background: #fff;
}
.system-app-title {
    margin-top: 38px;
    margin-bottom: 0px;
    font-size: 60px;
    font-weight: 900;
    color: #313131;
    background-color: #fff;
    text-align: center;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 30px;
}
.system-app-desc {
    background-color: #fff;
    text-align: center;
    color: #313131;
    font-size: 16px;
    padding-bottom: 45px;
}
.system-app-grid {
    padding: 38px 32px 40px;
}

/* AI+DA 描述包裹层 */
.ai-da-desc-wrapper {
    color: #fff;
    font-size: 16px;
}

/* ===== 丰富的应用 - wire-step-card 卡片样式 ===== */
.wire-step-card {
    display: block;
    text-decoration: none !important;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(0,0,0,0.06);
    margin-bottom: 30px;
}
.wire-step-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(37, 154, 214, 0.15);
}
.wire-step-card img {
    width: 100%;
    border-radius: 0;
    margin-bottom: 15px;
    display: block;
}
.wire-step-card-title {
    color: #259ad6;
    font-size: 16px;
    font-weight: 700;
    margin: 25px 0 0 0;
    text-align: left;
    text-decoration: none !important;
    border-bottom: none !important;
}
.wire-step-card-desc {
    font-size: 13px;
    color: #666;
    line-height: 1.5;
    margin: 10px 0 10px 0;
    text-align: left;
    text-decoration: none !important;
    border-bottom: none !important;
}

/* ===== #pc_con 主内容区 ===== */
#pc_con {
    margin-bottom: 80px;
}
@media (min-width: 992px) {
    .main-menu > li > a {
        padding: 8px 16px !important;
        border-radius: 20px !important;
    }
    .main-menu > li > a:hover {
        font-weight: 900 !important;
        background-color: rgba(255,255,255,0.2) !important;
    }
    /* 导航项间距 */
    .main-menu > li {
        margin: 0 8px !important;
    }
    .main-menu > li {
        transform: none !important;
        transition: none !important;
    }
    .main-menu > li:hover {
        transform: none !important;
    }
    .main-menu > li a {
        transition: none !important;
        transform: none !important;
    }
    .main-menu .dropdown-menu li a:hover {
        font-weight: 900 !important;
    }
    .main-menu .dropdown-menu {
        border-radius: 12px !important;
        overflow: hidden;
    }

    /* 大卡片下拉菜单 - 仅PC端 */
    .has-mega-menu {
        position: relative;
    }
    .has-mega-menu .mega-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        z-index: 9999;
        min-width: 510px;
        padding-top: 8px;
    }
    .has-mega-menu:hover .mega-menu {
        display: block;
    }
    .mega-menu-inner {
        display: flex;
        background: #fff;
        border-radius: 24px;
        overflow: hidden;
        box-shadow: 0 8px 32px rgba(0,0,0,0.12);
        padding: 24px 20px 24px 24px;
        gap: 24px;
        align-items: center;
    }
    .mega-menu-left {
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 6px;
        min-width: 140px;
    }
    .mega-menu-left.mega-col-2 {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px 16px;
        max-width: 320px;
    }
    .mega-menu-left.mega-col-2 a {
        width: auto;
    }
    /* 下拉菜单文字颜色 - 默认黑色（高特异性，覆盖 style.css） */
    .intro .main-nav .has-mega-menu .mega-menu .mega-menu-left a,
    .intro .main-nav .has-mega-menu .mega-menu-left a,
    .intro .main-nav ul.main-menu li.has-mega-menu .mega-menu .mega-menu-left a {
        color: #000 !important;
        font-size: 15px;
        padding: 10px 16px;
        border-radius: 10px;
        text-decoration: none !important;
        transition: background 0.2s, color 0.2s, font-weight 0.2s;
        white-space: nowrap;
        background: transparent !important;
    }
    /* 下拉菜单文字颜色 - hover 浅蓝色 */
    .intro .main-nav .has-mega-menu .mega-menu .mega-menu-left a:hover,
    .intro .main-nav .has-mega-menu .mega-menu-left a:hover,
    .intro .main-nav ul.main-menu li.has-mega-menu .mega-menu .mega-menu-left a:hover {
        color: #259ad6 !important;
        font-weight: 700;
        background: transparent !important;
    }
    .mega-menu-right {
        flex: 0 0 auto;
        width: 200px;
        height: 250px;
        border-radius: 16px;
        overflow: hidden;
        margin-right: 4px;
        margin-left: 100px;
    }
    .mega-menu-right img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        border-radius: 16px;
    }
} /* end PC-only media query */

/* ===== 移动端导航覆盖 ===== */
@media (max-width: 991px) {

    /* 覆盖 Bootstrap 默认的 hover/open 浅灰背景 */
    .nav > li > a:hover,
    .nav > li > a:focus,
    .nav .open > a,
    .nav .open > a:focus,
    .nav .open > a:hover {
        background: transparent !important;
        color: #259ad6 !important;
    }

    /* 一级菜单：无箭头、无分隔线 */
    .main-menu > li {
        margin: 0 !important;
        display: block !important;
        border-bottom: none !important;
    }
    .main-menu > li > a {
        display: block !important;
        position: relative !important;
        padding: 12px 16px !important;
        border-radius: 0 !important;
        color: #ffffff !important;
        font-size: 15px !important;
        font-weight: 400 !important;
        border-bottom: none !important;
        background: none !important;
        text-decoration: none !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }
    .main-menu > li > a:hover,
    .main-menu > li > a:active,
    .main-menu > li > a:focus {
        color: #259ad6 !important;
        background: transparent !important;
    }
    /* 去掉一级菜单箭头 */
    .main-menu > li > a::after {
        content: none !important;
    }
    .has-mega-menu.mobile-open > a::after {
        content: none !important;
        transform: none !important;
    }

    /* 搜索框隐藏 */
    .main-menu li.search {
        display: none !important;
        border-bottom: none !important;
    }

    /* 子菜单容器 */
    .has-mega-menu {
        position: static !important;
    }
    .has-mega-menu .mega-menu {
        display: none !important;
        position: static !important;
        transform: none !important;
        min-width: 100% !important;
        width: 100% !important;
        padding: 0 !important;
        box-shadow: none !important;
        background: transparent !important;
    }
    .has-mega-menu:hover .mega-menu {
        display: none !important;
    }
    .has-mega-menu.mobile-open .mega-menu {
        display: block !important;
    }
    .mega-menu-inner {
        display: flex !important;
        flex-direction: column !important;
        background: transparent !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        padding: 0 !important;
        gap: 0 !important;
        margin: 0 !important;
    }
    .mega-menu-right {
        display: none !important;
    }
    .mega-menu-left {
        min-width: 100% !important;
        max-width: 100% !important;
        flex-direction: column !important;
        gap: 0 !important;
        padding: 0 !important;
    }
    .mega-menu-left.mega-col-2 {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: none !important;
        gap: 0 !important;
    }

    /* 二级菜单：无箭头、无分隔线 */
    .mega-menu-left a {
        display: block !important;
        position: relative !important;
        color: #ffffff !important;
        font-size: 14px !important;
        font-weight: 400 !important;
        padding: 10px 16px 10px 28px !important;
        border-radius: 0 !important;
        border-left: none !important;
        border-bottom: none !important;
        text-decoration: none !important;
        background: none !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }
    .mega-menu-left a::after {
        content: none !important;
    }
    .mega-menu-left a:hover,
    .mega-menu-left a:active {
        color: #259ad6 !important;
        background: transparent !important;
    }
} /* end mobile override */


/* ===== Header 顶部联系栏 ===== */
.header-contact-item {
    padding: 10px 10px;
    height: 40px;
}
.header-top-social {
    text-align: center;
}
.header-slogan {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    padding: 10px 10px;
    height: 40px;
    font-weight: 400;
    letter-spacing: 1px;
}

/* ===== 导航字号 ===== */

/* ===== section-dark (深色背景区) ===== */
.section-dark {
    background: #525252;
}

/* ===== Footer ===== */
.footer-widget-col {
    padding-left: 40px;
}
.footer-link {
    color: #969595;
    font-size: 12px;
}
.footer-link:hover {
    text-decoration: underline;
}
.footer-text {
    color: #969595;
    font-size: 12px;
    pointer-events: none;
}
.footer-bottom-text {
    color: #969595;
    font-size: 12px;
    padding-left: 15px;
    margin-top: 3px;
    line-height: 30px;
}
.copyright {
    text-align: center;
    font-size: 12px;
}
.copyright-text {
    color: #969595;
}
.footer-keywords {
    color: #969595;
}