/* about/about.html 专属样式 */

/* ============================
   六张图样式 - 完整移植自原版 style.css
   ============================ */

/* 标题区域 */
.portfolio-title-area {
    text-align: center;
    margin-bottom: 40px;
    padding: 0 60px;
}
.portfolio-main-title {
    font-size: 45px;
    font-weight: 900;
    color: #3b3b3b;
    margin-bottom: 10px;
    text-transform: uppercase;
    padding-bottom: 5px;
    position: relative;
}
.portfolio-sub-title {
    font-size: 16px;
    color: #313131;
    margin-bottom: 10px;
    padding-top: 25px;
    padding-left: 40px;
    padding-right: 40px;
}

.portfolio {
    padding-bottom: 60px;
    background-color: #f8f8f8;
}
/* portfolio-container：flex 布局，padding 与标题区对齐 */
.portfolio .portfolio-container {
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0 60px;
}
.portfolio .portfolio-col {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    padding: 0 12px;
    box-sizing: border-box;
}
.portfolio .portfolio-item {
    background: #444444;
    overflow: hidden;
    min-height: 200px;
    position: relative;
    border-radius: 4px;
    margin: 0 0 30px 0;
}
.portfolio .portfolio-item img {
    transition: all 0.3s ease-in-out;
}
.portfolio .portfolio-item .portfolio-info {
    opacity: 0;
    position: absolute;
    transition: all .3s linear;
    text-align: center;
    top: 10%;
    left: 0;
    right: 0;
}
.portfolio .portfolio-item .portfolio-info h3 {
    font-size: 20px;
}
.portfolio .portfolio-item .portfolio-info h3 a {
    color: #fff;
    font-weight: bold;
}
.portfolio .portfolio-item .portfolio-info a i {
    color: #a162f7;
    font-size: 24px;
}
.portfolio .portfolio-item:hover img {
    opacity: 0.4;
    transform: scale(1.1);
}
.portfolio .portfolio-item:hover .portfolio-info {
    opacity: 1;
    top: calc(50% - 30px);
}
.portfolio .img-fluid {
    width: 100%;
    height: auto;
}

/* 六张图响应式 */
@media (max-width: 992px) {
    .portfolio-title-area,
    .portfolio .portfolio-container {
        padding: 0 20px;
    }
    .portfolio .portfolio-col {
        flex: 0 0 50%;
        max-width: 50%;
    }
}
@media (max-width: 576px) {
    .portfolio-title-area,
    .portfolio .portfolio-container {
        padding: 0 15px;
    }
    .portfolio .portfolio-col {
        flex: 0 0 100%;
        max-width: 100%;
    }
    .portfolio-main-title {
        font-size: 28px;
    }
}

/* ============================
   PC端导航栏样式（≥992px）
   ============================ */
@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;
    }
    .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;
    }
    .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;
    }
    .mega-menu-left a:hover {
        color: #259ad6 !important;
        font-weight: 700;
    }
    .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（≤991px）
   ============================ */
@media (max-width: 991px) {

    .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;
    }

    .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;
    }
    .main-menu > li > a::after {
        content: none !important;
    }
    .has-mega-menu.mobile-open > a::after {
        content: none !important;
        transform: none !important;
    }

    .main-menu li.search {
        display: none !important;
        border-bottom: none !important;
    }

    .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;
    }

    .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 */