/* 通用样式 部分*/
:root {
    --radius-none: 0;
    --radius-xs: 2px;
    --radius-line: 3px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-round: 50%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-size: 16px;
    font-family: 'Microsoft YaHei';
}

a {
    text-decoration: none;
}

li,
ol {
    list-style: none;
}

i {
    font-style: normal;
}

/* 版心 */
.container {
    width: 16rem;
    margin: 0 auto;
}

/* 一级标题 */
.sec-title {
    font-size: 40px;
}

/* 二级标题 */
.sub-title {
    font-size: 30px;
}

/* 三级标题 */
.item-title {
    font-size: 24px;
}

/* 新闻大标题 */
.news-title {
    font-size: 30px;
    color: #333333;
}

/* 新闻列表标题 */
.news-item-title {
    font-size: 18px;
    color: #333333;
}

img:not([src]),
img[src=""],
img[src="#"],
img.is-img-transparent {
    opacity: 0 !important;
}
#BodyLabel img {
    max-width: 90% !important;
}
/* 通用样式结束 /* ------------------------------------------------------------ */

/* PC样式开始 */
/* 头部样式开始 */
.sinopec-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background-color: #f3f6f8;
    box-shadow: 8px 3px 24px 0px rgba(0, 0, 0, 0.15);
}

.header-container {
    position: fixed;
    margin-bottom: 1.2rem;
}

.header-web {
    width: 100%;
    height: 1.2rem;
    padding: 0 0.68rem;
    background-color: #fff;
    display: flex;
    justify-content: space-between;
}

.nav-toggle {
    display: none;
}

.website-logo {
    height: 100%;
    display: flex;
    align-items: center;
}

.logo-link {
    width: 100%;
    display: flex;
}

.logo-link .logo-img {
    height: 0.9rem;
    display: block;
}

.sinopec-header-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: center;
}

.header-tools {
    display: flex;
    align-items: center;
    gap: 0.24rem;
}

.search-btn {
    width: 0.24rem;
    height: 0.24rem;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
}

.nav-toggle {
    width: 0.24rem;
    height: 0.24rem;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 0.05rem;
}

.nav-toggle span {
    width: 100%;
    height: 2px;
    background-color: #333;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

body.mobile-nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(0.07rem) rotate(45deg);
}

body.mobile-nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

body.mobile-nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-0.07rem) rotate(-45deg);
}

.icon-search,
.site-group i {
    width: 0.24rem;
    height: 0.24rem;
    flex: 0 0 0.24rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-search img,
.site-group i img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.site-group {
    display: flex;
    align-items: center;
    gap: 0.06rem;
    color: #666;
    transition: all 0.3s;
}

.site-group:hover {
    color: #000;
    font-weight: 700;
}

.sinopec-link {
    color: #666;
    transition: all 0.3s;
}

.sinopec-link:hover {
    color: #000;
    font-weight: 700;
}

.sinopec-header-nav .nav-list {
    display: flex;
    margin-top: 0.26rem;
}

.sinopec-header-nav .nav-list>.nav-item {
    position: relative;
    margin-left: 0.6rem;
    z-index: 1;
}

.sinopec-header-nav .nav-list>.nav-item::after {
    content: "";
    position: absolute;
    top: 100%;
    left: -0.35rem;
    right: -0.35rem;
    height: 0.8rem;
    display: none;
}

.sinopec-header-nav .nav-list>.nav-item:hover::after {
    display: block;
}

.sinopec-header-nav .nav-list>.nav-item:hover {
    z-index: 3;
}

.sinopec-header-nav .nav-list>.nav-item>a {
    color: #333;
    font-size: 20px;
    position: relative;
    display: inline-block;
    padding-bottom: 0.12rem;
    transition: color 0.4s ease;
}

.sinopec-header-nav .nav-list>.nav-item>a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 100%;
    height: 3px;
    background-color: #E60012;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 0.4s ease;
    pointer-events: none;
}

.sinopec-header-nav .nav-list>.nav-item:hover>a {
    font-weight: 700;
}

.sinopec-header-nav .nav-list>.nav-item:hover>a::after {
    transform: translateX(-50%) scaleX(1);
}

.sinopec-header-nav .nav-list>.nav-item:first-child {
    margin-left: 0;
}

.sinopec-header-nav .nav-item .tree-ul {
    position: fixed;
    top: 1.2rem;
    left: 0;
    width: 100%;
    background-color: #F5F7FA;
    padding: 0.25rem 0;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.4s ease,
        transform 0.4s ease,
        visibility 0s linear 0.4s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sinopec-header-nav .nav-item:hover .tree-ul {
    z-index: 2;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition: opacity 0.4s ease,
        transform 0.4s ease,
        visibility 0s;
}

.sinopec-header-nav .nav-item .tree-ul .nav-item {
    margin: 0 0.4rem;
}

.sinopec-header-nav .nav-item .tree-ul .nav-item a {
    color: #666666;
    font-size: 20px;
    position: relative;
    display: inline-block;
    padding-bottom: 0.1rem;
    transition: color 0.4s ease;
}

.sinopec-header-nav .nav-item .tree-ul .nav-item a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 100%;
    height: 3px;
    background-color: #E60012;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 0.4s ease;
    pointer-events: none;
}

.sinopec-header-nav .nav-item .tree-ul .nav-item:hover a {
    color: #333333;
    font-weight: 700;
}

.sinopec-header-nav .nav-item .tree-ul .nav-item:hover a::after {
    transform: translateX(-50%) scaleX(1);
}

/* 头部样式结束 */

.site-back-top,
.home-back-top {
    position: fixed;
    right: 0.34rem;
    bottom: 0.36rem;
    z-index: 58;
    width: 0.58rem;
    height: 0.58rem;
    border: 0;
    border-radius: var(--radius-lg);
    background-color: rgba(255, 255, 255, 0.96);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.3s ease, visibility 0s linear 0.3s, transform 0.3s ease, background-color 0.3s ease;
}

.site-back-top::before,
.site-back-top::after,
.home-back-top::before,
.home-back-top::after {
    content: "";
    position: absolute;
    left: 50%;
    background-color: #c4c8cf;
    transition: background-color 0.3s ease;
}

.site-back-top::before,
.home-back-top::before {
    top: 0.19rem;
    width: 0.16rem;
    height: 0.16rem;
    border-top: 2px solid #c4c8cf;
    border-left: 2px solid #c4c8cf;
    background-color: transparent;
    transform: translateX(-50%) rotate(45deg);
    transition: border-color 0.3s ease;
}

.site-back-top::after,
.home-back-top::after {
    top: 0.19rem;
    width: 2px;
    height: 0.24rem;
    transform: translateX(-50%);
}

.site-back-top.is-visible,
.home-back-top.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition: opacity 0.3s ease, visibility 0s, transform 0.3s ease, background-color 0.3s ease;
}

.site-back-top:hover,
.site-back-top:focus-visible,
.home-back-top:hover,
.home-back-top:focus-visible {
    background-color: #E60012;
}

.site-back-top:hover::before,
.site-back-top:focus-visible::before,
.home-back-top:hover::before,
.home-back-top:focus-visible::before {
    border-color: #fff;
}

.site-back-top:hover::after,
.site-back-top:focus-visible::after,
.home-back-top:hover::after,
.home-back-top:focus-visible::after {
    background-color: #fff;
}

/* 底部样式开始 */
.sinopec-footer {
    background-color: #F5F7FA;
}

.footer-main {
    padding: 0.4rem 0 0.6rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.6rem;
}

.footer-contact p {
    color: #666666;
    font-size: 16px;
    line-height: 32px;
}

.footer-qrcodes {
    display: flex;
    gap: 0.38rem;
}

.qrcode-box {
    text-align: center;
    background: #fff;
    padding: 8px;
    padding-bottom: 12px;
}

.qrcode-box img {
    width: 1.2rem;
    height: 1.2rem;
    display: block;

}

.qrcode-box span {
    margin-top: 0.08rem;
    color: #999999;
    font-size: 16px;
    display: block;
}

.footer-bottom {
    border-top: 1px solid #dfe5ea;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.2rem 0;
}

.footer-logo {
    height: 60px;
    display: block;
}

.footer-logo-link {
    display: block;
    flex: 0 0 auto;
}

.footer-bottom p {
    color: #999999;
    font-size: 15px;
}

/* 底部样式结束 */

/* PC样式结束 /* ------------------------------------------------------------ */

/* 超宽屏样式开始 */
@media screen and (min-width: 1921px) {
    * {
        font-size: 0.18rem;
    }

    .sec-title {
        font-size: 42px;
    }

    .sub-title {
        font-size: 32px;
    }

    .item-title {
        font-size: 0.22rem;
    }

    .news-title {
        font-size: 0.3rem;
    }

    /* 4K屏幕 */
    .news-item-title {
        font-size: 0.2rem;
    }

    .sinopec-header-nav .nav-list>.nav-item>a,
    .sinopec-header-nav .nav-item .tree-ul .nav-item a {
        font-size: 0.2rem;
    }

    .site-group,
    .sinopec-link,
    .footer-contact p,
    .qrcode-box span {
        font-size: 0.18rem;
        line-height: 0.36rem
    }

    .footer-bottom p {
        font-size: 17px;
    }

    .latest-panel .headline-news p {
        font-size: 16px;
    }
}

@media screen and (min-width: 2560px) {
    * {
        font-size: 0.2rem;
    }

    .sec-title {
        font-size: 0.4rem;
    }

    .sub-title {
        font-size: 0.3rem;
    }

    /* 2K屏幕 */
    .news-item-title {
        font-size: 0.2rem;
    }

    .latest-panel .headline-news p {
        font-size: 0.18rem;
    }

    .footer-bottom p {
        font-size: 0.18rem;
    }

    .footer-logo {
        width: 1.6rem;
    }
}

/* 超宽屏样式结束 /* ------------------------------------------------------------ */




@media screen and (max-width: 1600px) and (min-width: 1441px) {
    * {
        font-size: 15px;
    }

    .sec-title {
        font-size: 38px;
    }

    .sub-title {
        font-size: 28px;
    }

    .item-title {
        font-size: 22px;
    }

    .news-title {
        font-size: 28px;
    }

    .news-item-title {
        font-size: 17px;
    }

    .site-group,
    .sinopec-link,
    .footer-contact p,
    .qrcode-box span {
        font-size: 15px;
    }

    .footer-bottom p {
        font-size: 14px;
    }

    .header-web {
        padding: 0 0.48rem;
    }

    .website-logo {
        width: 3.1rem;
    }

    .sinopec-header-nav .nav-list>.nav-item {
        margin-left: 0.42rem;
    }

    .sinopec-header-nav .nav-list>.nav-item>a,
    .sinopec-header-nav .nav-item .tree-ul .nav-item a {
        font-size: 18px;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item {
        margin: 0 0.32rem;
    }

}

/* pad端样式开始  */
@media screen and (max-width: 1440px) and (min-width: 1025px) {
    * {
        font-size: 15px;
    }

    .sec-title {
        font-size: 36px;
    }

    .sub-title {
        font-size: 26px;
    }

    .item-title {
        font-size: 20px;
    }

    .news-title {
        font-size: 26px;
    }

    .news-item-title {
        font-size: 16px;
    }

    .header-web {
        height: 76px;
        padding: 0 26px;
    }

    .website-logo {
        width: 2.85rem;
    }

    .header-tools {
        gap: 0.18rem;
    }

    .sinopec-header-nav .nav-list {
        margin-top: 0.2rem;
    }

    .sinopec-header-nav .nav-list>.nav-item {
        margin-left: 0.32rem;
    }

    .sinopec-header-nav .nav-list>.nav-item>a,
    .sinopec-header-nav .nav-item .tree-ul .nav-item a {
        font-size: 16px;
    }

    .sinopec-header-nav .nav-item .tree-ul {
        top: 1.08rem;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item {
        margin: 0 0.26rem;
    }

    .site-group,
    .sinopec-link,
    .footer-contact p,
    .qrcode-box span {
        font-size: 14px;
    }

    .footer-bottom p {
        font-size: 14px;
    }
}

/* pad端样式结束 /* ------------------------------------------------------------ */


/* 移动端样式开始 */
@media screen and (max-width: 1024px) {
    * {
        font-size: 14px;
    }



    .container {
        width: auto;
        max-width: none;
        margin: 0 24px;
    }

    .sec-title {
        font-size: 34px;
    }

    .sub-title {
        font-size: 24px;
    }

    .item-title {
        font-size: 18px;
    }

    .news-title {
        font-size: 24px;
    }

    .news-item-title {
        font-size: 16px;
    }

    body.mobile-nav-open {
        overflow: hidden;
    }

    .site-back-top,
    .home-back-top {
        display: none;
    }

    .sinopec-header {
        position: sticky;
        top: 0;
        z-index: 60;
    }

    .sinopec-header::before {
        content: "";
        position: fixed;
        inset: 0;
        z-index: 20;
        background-color: rgba(0, 0, 0, 0.42);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0s linear 0.3s;
    }

    body.mobile-nav-open .sinopec-header::before {
        opacity: 1;
        visibility: visible;
        transition: opacity 0.3s ease, visibility 0s;
    }

    .header-web {
        height: 72px;
        padding: 0 24px;
        position: relative;
        z-index: 30;
        align-items: center;
    }

    .website-logo {
        width: 260px;
    }

    .logo-link .logo-img {
        height: 56px;
    }

    .sinopec-header-nav {
        flex: 1;
        min-width: 0;
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
    }

    .header-tools {
        gap: 18px;
    }

    .search-btn,
    .nav-toggle,
    .icon-search,
    .site-group i {
        width: 24px;
        height: 24px;
        flex: 0 0 24px;
    }

    .nav-toggle {
        display: flex;
        position: relative;
        z-index: 42;
        gap: 5px;
    }

    .nav-toggle span {
        height: 2px;
    }

    body.mobile-nav-open .nav-toggle span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    body.mobile-nav-open .nav-toggle span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .site-group,
    .sinopec-link {
        display: none;
    }

    .sinopec-header-nav .nav-list {
        position: fixed;
        top: 0;
        right: 0;
        z-index: 40;
        width: min(82vw, 320px);
        height: 100vh;
        margin-top: 0;
        padding: 88px 0 24px;
        background-color: #fff;
        display: block;
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform 0.35s ease;
    }

    body.mobile-nav-open .sinopec-header-nav .nav-list {
        transform: translateX(0);
    }

    .sinopec-header-nav .nav-list>.nav-item,
    .sinopec-header-nav .nav-list>.nav-item:first-child {
        margin-left: 0;
        border-bottom: 1px solid #eef0f3;
    }

    .sinopec-header-nav .nav-list>.nav-item::after {
        display: none;
    }

    .sinopec-header-nav .nav-list>.nav-item:hover {
        z-index: 1;
    }

    .sinopec-header-nav .nav-list>.nav-item>a {
        width: 100%;
        min-height: 50px;
        padding: 0 42px 0 24px;
        display: flex;
        align-items: center;
        color: #333;
        font-size: 14px;
        font-weight: 400;
        line-height: 1.4;
    }

    .sinopec-header-nav .nav-list>.nav-item:hover>a {
        color: #333;
        font-weight: 400;
    }

    .sinopec-header-nav .nav-list>.nav-item>a::after {
        display: none;
    }

    .sinopec-header-nav .nav-list>.nav-item.has-children>a::before {
        content: "";
        position: absolute;
        right: 24px;
        top: 50%;
        width: 8px;
        height: 8px;
        border-right: 2px solid #999;
        border-bottom: 2px solid #999;
        transform: translateY(-65%) rotate(45deg);
        transition: transform 0.3s ease, border-color 0.3s ease;
    }

    .sinopec-header-nav .nav-list>.nav-item.has-children.is-open>a {
        color: #E60012;
        font-weight: 700;
    }

    .sinopec-header-nav .nav-list>.nav-item.has-children.is-open:hover>a {
        color: #E60012;
        font-weight: 700;
    }

    .sinopec-header-nav .nav-list>.nav-item.has-children.is-open>a::before {
        border-color: #E60012;
        transform: translateY(-30%) rotate(-135deg);
    }

    .sinopec-header-nav .nav-item .tree-ul,
    .sinopec-header-nav .nav-item:hover .tree-ul {
        position: static;
        width: 100%;
        max-height: 0;
        padding: 0 24px;
        background-color: #F5F7FA;
        z-index: auto;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        display: block;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
    }

    .sinopec-header-nav .nav-item.is-open>.tree-ul {
        max-height: 520px;
        padding: 8px 24px 14px;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item {
        margin: 0;
        border-bottom: 0;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item a {
        width: 100%;
        padding: 9px 0;
        color: #666;
        font-size: 14px;
        font-weight: 400;
        line-height: 1.4;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item a::after {
        display: none;
    }

    .sinopec-header-nav .nav-item .tree-ul .nav-item:hover a {
        color: #666;
        font-weight: 400;
    }

    .footer-main {
        padding: 42px 0 36px;
        gap: 32px;
        flex-direction: column;
        align-items: center;
    }

    .footer-contact {
        width: 100%;
    }

    .footer-contact p {
        text-align: center;
    }

    .footer-qrcodes {
        gap: 24px;
        flex-wrap: wrap;
    }



    .qrcode-box img {
        width: 120px;
        height: 120px;
    }

    .qrcode-box span,
    .footer-bottom p {
        font-size: 14px;
        margin-top: 8px;
        text-align: center;
        line-height: 24px;
    }

    .footer-bottom {
        min-height: 72px;
        gap: 18px;
    }

    .footer-logo {
        width: 96px;
        display: none;
    }

    .footer-bottom p:last-child {
        grid-column: 2;
    }
}

@media screen and (max-width: 750px) {
    .sinopec-footer {
        border-top: 1px solid #dddfe2;
    }

    .container {
        margin: 0 16px;
    }

    .sec-title {
        font-size: 24px;
    }

    .sub-title {
        font-size: 20px;
    }

    .item-title,
    .news-title {
        font-size: 16px;
    }

    .header-web {
        height: 56px;
        padding: 0 16px;
    }

    .website-logo {
        width: 210px;
    }

    .logo-link .logo-img {
        height: 44px;
    }

    .header-tools {
        gap: 12px;
    }

    .sinopec-header-nav .nav-list {
        padding-top: 72px;
    }

    .footer-main {
        padding: 34px 0 28px;
        flex-direction: column;
    }

    .footer-qrcodes {
        width: 100%;
        justify-content: center;
    }

    .footer-bottom {
        padding: 22px 0;
        gap: 12px;
        flex-direction: column;
    }

    .footer-bottom p:last-child {
        grid-column: auto;
    }
}

@media screen and (max-width: 420px) {
    .website-logo {
        width: 178px;
    }

    .header-web {
        padding: 0 14px;
    }
}

/* 移动端样式结束 */