:root {
    --blue: #0072CE;
    --dark: #002D54;
    --gray: #F2F4F7;
    --border: #e6e9ee;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { height: 100%; }
body { font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; color: #333; line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 顶部导航 */
.header { background: #fff; position: sticky; top: 0; z-index: 100; box-shadow: 0 1px 4px rgba(0, 0, 0, .08); }
.header .container { display: flex; align-items: center; height: 74px; }
.logo { flex-shrink: 0; display: flex; align-items: center; }
.logo img { height: 42px; width: auto; }
.nav { display: flex; margin-left: 24px; align-items: stretch; height: 74px; min-width: 0; }
.nav > li { position: relative; display: flex; align-items: center; min-width: 0; }
.nav > li > a { display: block; padding: 0 14px; font-size: 14px; font-weight: 600; color: var(--dark); height: 74px; line-height: 74px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 200px; }
.nav > li:hover > a { color: var(--blue); box-shadow: inset 0 -3px 0 var(--blue); }
.nav .drop { position: absolute; top: 74px; left: 0; min-width: 200px; background: #fff; box-shadow: 0 8px 20px rgba(0, 0, 0, .12); display: none; }
.nav > li:hover .drop { display: block; }
.nav .drop a { display: block; padding: 11px 20px; font-size: 14px; color: #333; border-bottom: 1px solid #f2f2f2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 240px; }
.nav .drop a:hover { background: var(--gray); color: var(--blue); }

/* 首屏 Banner */
.hero { position: relative; height: 620px; overflow: hidden; background: var(--dark); }
.hero.banner { height: 410px; }
.hero img { width: 100%; height: 100%; object-fit: cover; }
.hero .mask { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0, 45, 84, .10), rgba(0, 45, 84, .55)); }
.hero .txt { position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-50%); text-align: center; color: #fff; padding: 0 20px; }
.hero h1 { font-size: 54px; letter-spacing: 8px; text-shadow: 0 2px 14px rgba(0, 0, 0, .35); }
.hero p { font-size: 18px; letter-spacing: 4px; margin-top: 20px; opacity: .95; }

/* 通用区块 */
.section { padding: 72px 0; }
.section.gray { background: var(--gray); }
.sec-head { text-align: center; margin-bottom: 46px; }
.sec-head h2 { font-size: 32px; color: var(--dark); padding-bottom: 16px; position: relative; }
.sec-head h2::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 56px; height: 3px; background: var(--blue); }
.sec-head p { color: #8a8f98; margin-top: 10px; font-size: 14px; }

/* 最新资讯 */
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 28px; transition: all .25s; }
.news-card:hover { box-shadow: 0 10px 30px rgba(0, 45, 84, .12); transform: translateY(-4px); }
.news-card .date { font-size: 13px; color: #9aa0a8; }
.news-card h3 { font-size: 17px; color: var(--dark); line-height: 1.5; margin: 12px 0 16px; min-height: 52px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; line-clamp: 2; overflow: hidden; }
.news-card .more { font-size: 13px; color: var(--blue); }

/* 疾病领域 */
.jb-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; }
.jb-card { position: relative; border-radius: 10px; overflow: hidden; height: 220px; width: calc((100% - 72px) / 4); box-shadow: 0 4px 16px rgba(0, 0, 0, .10); }
.jb-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.jb-card:hover img { transform: scale(1.06); }
.jb-card .mask { position: absolute; inset: 0; background: linear-gradient(180deg, transparent, rgba(0, 45, 84, .78)); }
.jb-card .nm { position: absolute; left: 0; right: 0; bottom: 0; padding: 16px 18px; color: #fff; font-size: 18px; font-weight: 600; }

/* 主要产品 */
.prod-block { margin-bottom: 36px; }
.prod-block h3 { font-size: 20px; color: var(--dark); border-left: 4px solid var(--blue); padding-left: 12px; margin-bottom: 18px; }
.prod-tags { display: flex; flex-wrap: wrap; gap: 12px; }
.prod-tag { border: 1px solid #d8dde3; border-radius: 30px; padding: 8px 20px; font-size: 14px; color: #333; background: #fff; transition: all .2s; }
.prod-tag:hover { border-color: var(--blue); color: var(--blue); }

/* 战略 / 创新 / 责任 */
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.three .card { position: relative; height: 320px; border-radius: 10px; overflow: hidden; color: #fff; background: linear-gradient(160deg, #0072CE, #002D54); display: flex; align-items: flex-end; }
.three .card .inner { padding: 30px; }
.three .card h3 { font-size: 26px; letter-spacing: 4px; margin-bottom: 10px; }
.three .card p { font-size: 14px; opacity: .85; margin-bottom: 16px; }
.three .card .link { display: inline-block; font-size: 13px; border: 1px solid rgba(255, 255, 255, .7); border-radius: 30px; padding: 7px 20px; transition: all .2s; }
.three .card .link:hover { background: #fff; color: var(--dark); }

/* 内页标题区 */
.page-head { background: #1B1B1B; color: #fff; text-align: center; padding: 64px 0; }
.page-head h1 { font-size: 40px; letter-spacing: 6px; }
.page-head p { margin-top: 12px; opacity: .85; font-size: 15px; }

/* 筛选 */
.filter { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter select, .filter input, .filter button { height: 44px; border: 1px solid #d8dde3; border-radius: 6px; padding: 0 16px; font-size: 14px; background: #fff; outline: none; }
.filter input { width: 280px; }
.filter button { background: #1B1B1B; color: #fff; border-color: #1B1B1B; cursor: pointer; }
.filter button:hover { background: #2f2f2f; border-color: #2f2f2f; }

/* 媒体列表 */
.media-list { max-width: 920px; margin: 0 auto; }
.media-item { display: flex; gap: 22px; padding: 26px 0; border-bottom: 1px solid var(--border); align-items: flex-start; transition: all .2s; }
.media-item:hover .mi { transform: translateX(8px); }
.media-item .md { min-width: 96px; text-align: center; border-right: 2px solid var(--blue); padding-right: 20px; }
.media-item .md b { font-size: 32px; color: var(--blue); display: block; line-height: 1.1; }
.media-item .md span { font-size: 13px; color: #8a8f98; }
.media-item .mi { transition: transform .2s; }
.media-item h3 { font-size: 17px; color: var(--dark); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; line-clamp: 2; overflow: hidden; }
.media-item:hover h3 { color: var(--blue); }
.media-item .abs { font-size: 13px; color: #8a8f98; margin-top: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; line-clamp: 2; overflow: hidden; }

/* 分页 */
.pager { display: flex; justify-content: center; gap: 8px; margin-top: 44px; flex-wrap: wrap; }
.pager a, .pager span { min-width: 38px; height: 38px; line-height: 38px; text-align: center; border: 1px solid #d8dde3; border-radius: 6px; font-size: 14px; color: #333; padding: 0 12px; display: inline-block; }
.pager a:hover { border-color: var(--blue); color: var(--blue); }
.pager .on { background: var(--blue); border-color: var(--blue); color: #fff; }

/* 文章详情 */
.detail { max-width: 920px; margin: 0 auto; }
.detail .back { display: inline-block; margin: 0 0 26px; color: var(--blue); font-size: 14px; }
.detail h1 { font-size: 28px; color: var(--dark); line-height: 1.5; }
.detail .meta { color: #8a8f98; font-size: 14px; margin: 14px 0 28px; border-bottom: 1px solid var(--border); padding-bottom: 18px; }
.detail .content { font-size: 15px; line-height: 1.9; color: #444; }
.detail .content img { max-width: 100%; margin: 12px 0; }

/* 单页文案 */
.page-content { max-width: 900px; margin: 0 auto; font-size: 15px; line-height: 1.9; color: #444; word-break: break-word; }
.page-content img { max-width: 100%; height: auto; margin: 12px 0; }
.page-content h1, .page-content h2, .page-content h3, .page-content h4 { color: var(--dark); margin: 28px 0 14px; }
.page-content h1 { font-size: 26px; }
.page-content h2 { font-size: 22px; }
.page-content h3 { font-size: 18px; }
.page-content p { margin-bottom: 16px; }
.page-content a { color: var(--blue); }
.page-content ul, .page-content ol { margin: 0 0 16px; padding-left: 24px; }
.page-content li { margin-bottom: 6px; }
.page-empty { text-align: center; color: #999; padding: 40px 0; }

/* 职业发展 */
.careers-intro { max-width: 860px; margin: 0 auto; font-size: 15px; color: #444; line-height: 2; }
.acc { max-width: 860px; margin: 0 auto; }
.acc-item { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 14px; background: #fff; overflow: hidden; }
.acc-item summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 26px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--dark); list-style: none; user-select: none; transition: color .2s; }
.acc-item summary::-webkit-details-marker { display: none; }
.acc-item summary:hover { color: var(--blue); }
.acc-item .arrow { width: 9px; height: 9px; border-right: 2px solid var(--blue); border-bottom: 2px solid var(--blue); transform: rotate(45deg); transition: transform .25s; margin-top: -4px; flex-shrink: 0; }
.acc-item[open] summary { color: var(--blue); }
.acc-item[open] .arrow { transform: rotate(-135deg); margin-top: 4px; }
.acc-body { height: 0; overflow: hidden; padding: 0 26px; font-size: 14px; color: #555; line-height: 2; }
.acc-item[open] .acc-body { height: auto; padding: 0 26px 22px; }

/* 领导团队 */
.leader-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.leader-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 28px 24px; text-align: center; transition: all .2s; }
.leader-card:hover { border-color: var(--blue); box-shadow: 0 6px 20px rgba(0, 45, 84, .10); transform: translateY(-3px); }
.leader-card b { display: block; font-size: 16px; color: var(--dark); margin-bottom: 8px; }
.leader-card span { font-size: 13px; color: #8a8f98; line-height: 1.7; }

/* 中国管理团队 */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.team-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 32px 24px 26px; text-align: center; transition: all .2s; }
.team-card:hover { border-color: var(--blue); box-shadow: 0 6px 20px rgba(0, 45, 84, .10); transform: translateY(-3px); }
.team-avatar { width: 120px; height: 120px; margin: 0 auto 18px; border-radius: 50%; overflow: hidden; box-shadow: 0 4px 14px rgba(0, 45, 84, .18); }
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-card b { display: block; font-size: 16px; color: var(--dark); margin-bottom: 8px; }
.team-card span { font-size: 13px; color: #8a8f98; line-height: 1.7; }

/* 在中国 */
.intro-row { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.intro-row .intro-img { border-radius: 10px; overflow: hidden; box-shadow: 0 10px 30px rgba(0, 45, 84, .12); }
.intro-row .intro-img img { width: 100%; height: auto; display: block; }
.intro-row .intro-text { font-size: 15px; color: #555; line-height: 2; }
.stat-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 22px; }
.stat-card { width: 260px; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 30px 22px; text-align: center; transition: all .2s; }
.stat-card:hover { border-color: var(--blue); box-shadow: 0 6px 20px rgba(0, 45, 84, .10); transform: translateY(-3px); }
.stat-card .num { font-size: 34px; font-weight: 700; color: var(--blue); display: block; line-height: 1.2; }
.stat-card .nm { font-size: 14px; color: #555; margin-top: 10px; }
.base-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.base-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; transition: all .2s; }
.base-card:hover { box-shadow: 0 10px 30px rgba(0, 45, 84, .12); transform: translateY(-4px); }
.base-card .img { height: 220px; overflow: hidden; }
.base-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.base-card:hover .img img { transform: scale(1.05); }
.base-card .info { padding: 20px 24px 24px; }
.base-card h3 { font-size: 17px; color: var(--dark); margin-bottom: 8px; }
.base-card p { font-size: 13px; color: #8a8f98; line-height: 1.8; }

/* 中国社会责任 */
.resp-row { display: flex; gap: 44px; align-items: flex-start; }
.resp-img { flex: 0 0 42%; border-radius: 10px; overflow: hidden; box-shadow: 0 10px 30px rgba(0, 45, 84, .12); }
.resp-img img { width: 100%; height: auto; display: block; }
.resp-list { flex: 1; }
.resp-list .acc-item { margin-bottom: 14px; }

/* 里程碑 */
.mile { max-width: 860px; margin: 0 auto; position: relative; padding-left: 30px; }
.mile::before { content: ""; position: absolute; left: 7px; top: 10px; bottom: 10px; width: 3px; background: linear-gradient(180deg, var(--blue), rgba(0, 114, 206, .25)); border-radius: 2px; }
.mile-item { position: relative; padding: 0 0 38px; }
.mile-item:last-child { padding-bottom: 0; }
.mile-item::before { content: ""; position: absolute; left: -30px; top: 8px; width: 13px; height: 13px; border-radius: 50%; background: var(--blue); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--blue); }
.mile-item .year { font-size: 24px; font-weight: 700; color: var(--blue); margin-bottom: 10px; letter-spacing: 1px; }
.mile-item ul { list-style: none; }
.mile-item ul li { font-size: 15px; color: #444; line-height: 1.9; padding: 8px 0; border-bottom: 1px dashed var(--border); }
.mile-item ul li:last-child { border-bottom: none; }

/* 疾病详情 */
.detail-content { max-width: 920px; margin: 0 auto; font-size: 15px; line-height: 1.9; color: #444; }
.detail-content img { max-width: 100%; margin: 12px 0; }
.pd-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pd-card { background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--blue); border-radius: 8px; padding: 24px; transition: all .2s; }
.pd-card:hover { box-shadow: 0 6px 20px rgba(0, 45, 84, .10); transform: translateY(-3px); }
.pd-card h3 { font-size: 16px; color: var(--dark); margin-bottom: 8px; }
.pd-card .sz { font-size: 13px; color: #8a8f98; }
.sus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* 战略 */
.strat-item { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; margin-bottom: 56px; }
.strat-item:last-child { margin-bottom: 0; }
.strat-item.rev .strat-img { order: 2; }
.strat-img { border-radius: 10px; overflow: hidden; box-shadow: 0 10px 30px rgba(0, 45, 84, .12); }
.strat-img img { width: 100%; display: block; }
.strat-text { font-size: 15px; color: #555; line-height: 2; }
.strat-text h2, .strat-text h3 { color: var(--dark); margin-bottom: 14px; }
.strat-text p { margin-bottom: 10px; }

/* 页脚 */
.footer { background: #1B1B1B; color: #c3cede; margin-top: auto; flex-shrink: 0; }
.footer .f-top { padding: 52px 0 40px; display: grid; grid-template-columns: 2fr 1.2fr 1.2fr; gap: 40px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer .f-links a { display: block; padding: 6px 0; font-size: 14px; color: #c3cede; }
.footer .f-links a:hover { color: #fff; }
.footer .f-bottom { border-top: 1px solid rgba(255, 255, 255, .15); padding: 18px 0; font-size: 13px; color: #8fa0b4; text-align: center; }

/* 右上角翻译下拉 */
.header .translate-wrap { display: flex; align-items: center; margin-left: auto; flex-shrink: 0; }
.header #translateSelectLanguage { height: 32px; padding: 0 10px; font-size: 13px; color: var(--dark); background: #fff; border: 1px solid var(--border); border-radius: 4px; outline: none; cursor: pointer; transition: border-color .2s; }
.header #translateSelectLanguage:hover { border-color: var(--blue); }

/* 手机端汉堡菜单按钮(桌面隐藏) */
.nav-toggle { display: none; }

@media (max-width: 900px) {
    .leader-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-row { grid-template-columns: 1fr; gap: 24px; }
    .resp-row { flex-direction: column; }
    .stat-card { width: calc((100% - 22px) / 2); }
    .base-grid { grid-template-columns: 1fr; }
    .pd-grid { grid-template-columns: repeat(2, 1fr); }
    .sus-grid { grid-template-columns: repeat(2, 1fr); }
    .strat-item { grid-template-columns: 1fr; gap: 24px; }
    .strat-item.rev .strat-img { order: 0; }
    .news-list, .three { grid-template-columns: repeat(2, 1fr); }
    .track { grid-template-columns: 1fr; }
    .jb-card { width: calc((100% - 24px) / 2); }
    .hero h1 { font-size: 38px; letter-spacing: 4px; }
    .footer .f-top { grid-template-columns: 1fr; }
    .filter input { width: 100%; }

    /* ===== 手机端导航(汉堡菜单) ===== */
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        width: 40px;
        height: 40px;
        margin-left: 10px;
        flex-shrink: 0;
        border: 1px solid var(--border);
        border-radius: 4px;
        background: #fff;
        cursor: pointer;
        padding: 0;
    }
    .nav-toggle .bar {
        width: 20px;
        height: 2px;
        border-radius: 2px;
        background: var(--dark);
        transition: transform .3s, opacity .3s;
    }
    .nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.active .bar:nth-child(2) { opacity: 0; }
    .nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .nav { display: none; }
    .nav.open {
        display: block;
        position: fixed;
        top: 74px;
        left: 0;
        right: 0;
        height: auto;
        max-height: calc(100vh - 74px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        background: #fff;
        margin: 0;
        z-index: 99;
        box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
    }
    .nav.open > li {
        display: block;
        height: auto;
    }
    .nav.open > li > a {
        display: block;
        height: auto;
        line-height: normal;
        padding: 14px 20px;
        max-width: none;
        white-space: normal;
        overflow: visible;
        border-bottom: 1px solid #f2f2f2;
        font-size: 15px;
    }
    .nav.open > li > a:hover { box-shadow: none; }
    .nav.open .drop {
        position: static;
        display: none;
        min-width: 0;
        box-shadow: none;
        background: #f7f8fa;
    }
    .nav.open > li.open .drop { display: block; }
    .nav.open .drop a {
        max-width: none;
        padding: 12px 20px 12px 36px;
        border-bottom: 1px solid #ececec;
    }
    .header .translate-wrap { margin-left: auto; }
}