:root {
    --green: #015e3c;
    --green-dark: #01452c;
    --green-light: #01853c;
    --green-soft: #eaf4ef;
    --red: #e6212a;
    --blue: #2778be;
    --ink: #333;
    --ink-2: #666;
    --muted: #999;
    --line: #e7e7e7;
    --bg: #f5f5f5;
    --radius: 6px;
    --shadow: 0 6px 24px rgba(1, 94, 60, .08);
    --font: "微软雅黑", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --footer: #252426;
    --footer-2: #1e1d1f;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.7;
    color: var(--ink-2);
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color .2s ease; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5 { color: var(--ink); line-height: 1.3; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.clearfix::after { content: ""; display: block; clear: both; }

/* ---------- 导航右侧（语言） ---------- */
.nav-right { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; margin-right: -110px; }
.nav-right .lang { color: #fff; font-weight: 600; white-space: nowrap; }
.nav-right .lang .cn { color: #b9e6d0; }

/* ---------- 导航 ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #333;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .18);
}
.navbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 76px; }
.navbar .logo { display: flex; align-items: center; margin-left: -152px; }
.navbar .logo img { height: 57.5px; }
.navbar .logo .brand-text { margin-left: 10px; display: flex; flex-direction: column; gap: 5px; line-height: 1.2; }
.navbar .logo .brand-text .cn { font-size: 19px; font-weight: 700; color: #fff; }
.navbar .logo .brand-text .en { font-size: 11px; color: #a9a9a9; letter-spacing: .5px; }

.nav-menu { display: flex; align-items: center; gap: 40px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
    display: block;
    padding: 12px 0;
    font-size: 16px;
    color: #fff;
    font-weight: 500;
    position: relative;
}
.nav-menu > li > a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 0;
    height: 3px;
    background: var(--green-light);
    transform: translateX(-50%);
    transition: width .3s ease;
}
.nav-menu > li > a:hover::after,
.nav-menu > li.active > a::after { width: 46px; }
.nav-menu > li > a:hover,
.nav-menu > li.active > a { color: #b9e6d0; }

.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 260px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(0, 0, 0, .18);
    border-top: 3px solid var(--green);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all .22s ease;
    z-index: 200;
}
.nav-menu > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown li a {
    display: block;
    padding: 9px 22px;
    color: var(--ink-2);
    font-size: 13px;
}
.dropdown li a:hover { color: #fff; background: var(--green); }
.dropdown li a.group {
    font-weight: 700;
    color: var(--green);
    font-size: 14px;
    border-top: 1px solid var(--line);
    margin-top: 4px;
    padding-top: 12px;
}
.dropdown li:first-child a.group { border-top: 0; margin-top: 0; }
.dropdown li a.group:hover { color: #fff; }
.dropdown li a.more {
    color: var(--muted);
    font-size: 13px;
}
.dropdown li a.more:hover { color: #fff; background: var(--green); }
.dropdown li a.current {
    background: #ADEBB3;
    color: var(--ink);
}
.dropdown li a.current:hover { background: var(--green); color: #fff; }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: #fff; display: block; border-radius: 2px; }

/* ---------- 首页横幅 ---------- */
.hero {
    position: relative;
    background:
        linear-gradient(120deg, rgba(1, 46, 30, .92) 0%, rgba(1, 94, 60, .88) 55%, rgba(3, 138, 83, .78) 100%),
        url("../images/company-about.jpg") center/cover no-repeat;
    color: #fff;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, .18);
}
.hero .container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding-top: 110px;
    padding-bottom: 110px;
}
.hero .tagline { font-size: 16px; letter-spacing: 5px; opacity: .9; margin-bottom: 20px; }
.hero h1 { font-size: 54px; color: #fff; font-weight: 700; margin-bottom: 24px; letter-spacing: 2px; }
.hero h1 span { color: #b9e6d0; }
.hero .desc { font-size: 18px; opacity: .94; max-width: 780px; margin: 0 auto 38px; }
.hero .btns { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; }
.hero .hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 54px;
    flex-wrap: wrap;
}
.hero .hero-stats .hs-item { text-align: center; }
.hero .hero-stats .hs-num { font-size: 42px; font-weight: 700; line-height: 1; }
.hero .hero-stats .hs-num small { font-size: 20px; margin-left: 3px; font-weight: 400; }
.hero .hero-stats .hs-label { margin-top: 8px; font-size: 14px; opacity: .85; letter-spacing: 2px; }

/* ---------- 通用区块 ---------- */
.section { padding: 76px 0; }
.section.alt { background: var(--bg); }
.section-head { text-align: center; margin-bottom: 46px; }
.section-head .en { color: var(--green); letter-spacing: 4px; font-size: 13px; text-transform: uppercase; margin-bottom: 8px; }
.section-head h2 { font-size: 34px; font-weight: 700; }
.section-head h2::after {
    content: "";
    display: block;
    width: 54px;
    height: 4px;
    background: var(--green);
    border-radius: 2px;
    margin: 16px auto 0;
}
.section-head p { margin-top: 14px; color: var(--muted); }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 13px 34px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
}
.btn-white { background: #fff; color: var(--green); }
.btn-white:hover { background: #eaf4ef; }
.btn-line { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, .7); }
.btn-line:hover { background: rgba(255, 255, 255, .14); }
.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: var(--green-dark); }

/* ---------- 首页产品分类（图文交替） ---------- */
.cate { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 64px; }
.cate:last-child { margin-bottom: 0; }
.cate.rev .cate-pic { order: 2; }
.cate .cate-pic { position: relative; }
.cate .cate-pic img {
    width: 100%;
    height: 360px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: 0 16px 40px rgba(0, 0, 0, .14);
}
.cate .cate-pic .badge {
    position: absolute;
    left: 0;
    top: 22px;
    background: var(--green);
    color: #fff;
    padding: 6px 18px;
    font-size: 14px;
    border-radius: 0 20px 20px 0;
    letter-spacing: 1px;
}
.cate .cate-body .cat { color: var(--green); font-size: 14px; letter-spacing: 2px; margin-bottom: 10px; }
.cate .cate-body h3 { font-size: 30px; margin-bottom: 16px; }
.cate .cate-body p { color: var(--ink-2); font-size: 15px; margin-bottom: 18px; }
.cate .cate-body .links { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.cate .cate-body .links a {
    display: inline-block;
    border: 1px solid var(--line);
    color: var(--ink-2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    transition: all .2s ease;
}
.cate .cate-body .links a:hover { background: var(--green); color: #fff; border-color: var(--green); }
.cate .cate-body .btn-green { padding: 11px 30px; font-size: 14px; }

/* ---------- 二级页布局（侧边栏 + 内容） ---------- */
.page-wrap { display: grid; grid-template-columns: 250px 1fr; gap: 34px; padding: 34px 0 70px; align-items: start; }
.side {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 96px - 24px);
    overflow-y: auto;
}
.side .side-title {
    background: var(--green);
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    text-align: center;
    padding: 16px 10px;
    letter-spacing: 2px;
}
.side ul { padding: 8px 0; }
.side ul li a {
    display: block;
    padding: 12px 24px;
    color: var(--ink-2);
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: all .2s ease;
}
.side ul li a:hover { color: var(--green); background: var(--green-soft); }
.side ul li a.on { color: #fff; background: var(--green); }
.side .side-root { padding: 0; }
.side .side-root > li { border-bottom: 1px solid var(--line); }
.side .side-root > li:last-child { border-bottom: 0; }
.side .cat-link {
    display: block;
    padding: 12px 24px;
    font-weight: 700;
    color: var(--green);
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: all .2s ease;
}
.side .cat-link:hover { background: var(--green-soft); }
.side .side-sub { padding: 0 0 10px; }
.side .side-sub li a {
    display: block;
    padding: 8px 24px 8px 38px;
    color: var(--ink-2);
    font-size: 13px;
    border-left: 3px solid transparent;
    transition: all .2s ease;
}
.side .side-sub li a:hover { color: var(--green); background: var(--green-soft); }
.side .side-sub li a.cur {
    background: #ADEBB3;
    color: var(--ink);
    font-weight: 600;
}
.main-col { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 34px; min-height: 420px; }
.main-col .mc-title {
    font-size: 22px;
    color: var(--green);
    padding-bottom: 14px;
    border-bottom: 2px solid var(--green);
    margin-bottom: 24px;
    position: relative;
    scroll-margin-top: 84px;
}
.main-col .mc-title small { font-size: 13px; color: var(--muted); margin-left: 10px; font-weight: 400; }
.main-col p { font-size: 15px; color: var(--ink-2); margin-bottom: 16px; line-height: 1.9; text-align: justify; }
.main-col .mc-sub { font-size: 18px; color: var(--green); margin: 26px 0 14px; padding-left: 12px; border-left: 4px solid var(--green); scroll-margin-top: 84px; }

/* ---------- 核心能力 / 技术栈 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cap-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 34px 28px;
    text-align: center;
    transition: all .25s ease;
}
.cap-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.cap-card .icon {
    width: 62px;
    height: 62px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: var(--green-soft);
    color: var(--green);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 700;
}
.cap-card h3 { font-size: 19px; margin-bottom: 10px; }
.cap-card p { font-size: 14px; color: var(--muted); }

/* ---------- 产品卡片 ---------- */
.pro-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.pro-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .25s ease;
    display: flex;
    flex-direction: column;
}
.pro-card:hover { box-shadow: var(--shadow); transform: translateY(-5px); }
.pro-card .pic { position: relative; height: 210px; overflow: hidden; background: #fff; }
.pro-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.pro-card:hover .pic img { transform: scale(1.06); }
.pro-card .body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.pro-card .cat { font-size: 12px; color: var(--green); margin-bottom: 6px; }
.pro-card h3 { font-size: 17px; margin-bottom: 8px; }
.pro-card p { font-size: 13px; color: var(--muted); flex: 1; margin-bottom: 14px; }
.pro-card .more { color: var(--green); font-size: 13px; font-weight: 600; }

/* ---------- 数字统计 ---------- */
.counters { background: var(--green); color: #fff; }
.counters .container { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 30px; padding-top: 56px; padding-bottom: 56px; }
.counters .c-item { text-align: center; }
.counters .c-num { font-size: 46px; font-weight: 700; line-height: 1; }
.counters .c-num span { font-size: 24px; margin-left: 2px; }
.counters .c-label { margin-top: 10px; font-size: 14px; opacity: .85; letter-spacing: 2px; }

/* ---------- 企业优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    padding: 30px 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: all .25s ease;
}
.adv-card:hover { box-shadow: var(--shadow); }
.adv-card .big {
    flex: 0 0 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--green);
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.adv-card h3 { font-size: 18px; margin-bottom: 6px; }
.adv-card p { font-size: 14px; color: var(--muted); }

/* ---------- 合作伙伴 ---------- */
.partners .strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 30px 50px;
}
.partners .strip img { max-height: 52px; width: auto; object-fit: contain; }

/* ---------- 页脚 ---------- */
.footer { background: var(--footer); color: #929293; }
.footer .top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 100px; padding: 56px 0 40px; }
.footer .top > div:nth-child(3) { margin-left: -20px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; position: relative; padding-left: 14px; }
.footer h4::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    background: var(--green-light);
    border-radius: 2px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: #929293; }
.footer ul li a:hover { color: #fff; }
.footer .brand { font-size: 14px; }
.footer .brand .name { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.footer .contact li { display: flex; gap: 10px; }
.footer .contact li .k { color: #b9e6d0; flex: 0 0 40px; }
.footer .bottom {
    border-top: 1px solid rgba(255, 255, 255, .1);
    padding: 18px 10px;
    text-align: center;
    font-size: 13px;
    background: var(--footer-2);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 4px 10px;
    line-height: 1.6;
}
.footer .bottom a { color: #929293; }
.footer .bottom a:hover { color: #fff; }
.footer .bottom .beian-link { display: inline-flex; align-items: center; }
.footer .bottom .beian-icon { height: 16px; width: auto; margin-right: 4px; }

/* ---------- 内页页头 ---------- */
.page-banner {
    background: linear-gradient(120deg, #013a25 0%, var(--green) 60%, #038a53 100%);
    color: #fff;
    text-align: center;
    padding: 70px 0;
}
.page-banner h1 { color: #fff; font-size: 36px; font-weight: 700; }
.page-banner .crumbs { margin-top: 12px; font-size: 14px; opacity: .85; }
.page-banner .crumbs a:hover { color: #fff; }

/* ---------- 面包屑 / 列表页 ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); margin: 22px 0 10px; }
.breadcrumb a { color: var(--ink-2); }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb span { color: var(--green); }

.pro-list .cat-title { font-size: 22px; color: var(--green); margin: 40px 0 20px; padding-left: 14px; border-left: 4px solid var(--green); }
.pro-list .cat-title small { font-size: 14px; color: var(--muted); margin-left: 10px; }

/* ---------- 产品详情 ---------- */
.pd-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.pd-gallery .main-pic {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    height: 420px;
}
.pd-gallery .main-pic img { width: 100%; height: 100%; object-fit: contain; }
.pd-gallery .thumbs { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.pd-gallery .thumbs img {
    width: 84px;
    height: 84px;
    object-fit: cover;
    border: 2px solid var(--line);
    border-radius: 8px;
    cursor: pointer;
    transition: border-color .2s ease;
}
.pd-gallery .thumbs img.on { border-color: var(--green); }
.pd-info h1 { font-size: 28px; margin-bottom: 14px; }
.pd-info .pd-cat { display: inline-block; background: var(--green-soft); color: var(--green); font-size: 13px; padding: 4px 14px; border-radius: 20px; margin-bottom: 16px; }
.pd-info .summary { font-size: 15px; color: var(--ink-2); margin-bottom: 24px; }
.pd-block { margin-bottom: 26px; }
.pd-block h3 { font-size: 18px; color: var(--green); margin-bottom: 12px; padding-left: 12px; border-left: 4px solid var(--green); }
.pd-block table { width: 100%; border-collapse: collapse; }
.pd-block table th, .pd-block table td { border: 1px solid var(--line); padding: 10px 14px; font-size: 14px; text-align: left; }
.pd-block table th { background: var(--bg); color: var(--ink); width: 130px; font-weight: 600; }
.pd-block ul.app li { position: relative; padding-left: 18px; margin-bottom: 8px; font-size: 14px; }
.pd-block ul.app li::before { content: "•"; position: absolute; left: 4px; color: var(--green); }

/* ---------- 关于页 ---------- */
.about-flex { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.about-flex img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-flex h2 { font-size: 28px; margin-bottom: 16px; }
.about-flex p { margin-bottom: 14px; font-size: 15px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.tag-list span { background: var(--green-soft); color: var(--green); padding: 8px 18px; border-radius: 24px; font-size: 14px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-grid .info-item { display: flex; gap: 16px; margin-bottom: 26px; align-items: flex-start; }
.contact-grid .info-item .ic {
    flex: 0 0 46px;
    height: 46px;
    background: var(--green-soft);
    color: var(--green);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}
.contact-grid .info-item h4 { font-size: 16px; margin-bottom: 4px; }
.contact-grid .info-item p { color: var(--ink-2); font-size: 15px; }
.map-box { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); min-height: 320px; background: var(--bg); display: flex; align-items: center; justify-content: center; color: var(--muted); }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
    .pro-grid { grid-template-columns: repeat(2, 1fr); }
    .cap-grid, .adv-grid { grid-template-columns: 1fr 1fr; }
    .footer .top { grid-template-columns: 1fr 1fr; }
    .cate { grid-template-columns: 1fr; gap: 28px; }
    .cate.rev .cate-pic { order: 0; }
    .cate .cate-pic img { height: 280px; }
    .page-wrap { grid-template-columns: 1fr; }
    .side { position: static; max-height: none; overflow: hidden; }
    .about-flex, .pd-wrap, .contact-grid { grid-template-columns: 1fr; }
    .pd-gallery .main-pic { height: 320px; }
    .hero h1 { font-size: 38px; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .navbar .logo { margin-left: 0; }
    .nav-right { margin-right: 0; }
    .nav-menu {
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #333;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        box-shadow: 0 16px 32px rgba(0, 0, 0, .3);
        display: none;
    }
    .nav-menu.open { display: flex; }
    .nav-menu > li > a { padding: 14px 22px; border-bottom: 1px solid rgba(255, 255, 255, .12); }
    .nav-menu > li > a::after { display: none; }
    .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border-top: 0; background: #2b2b2b; padding-left: 14px; display: none; }
    .dropdown li a { color: #ccc; }
    .dropdown li a:hover { background: var(--green); color: #fff; }
    .dropdown li a.group { color: #b9e6d0; border-top-color: rgba(255, 255, 255, .12); }
    .dropdown.show { display: block; }
    .pro-grid { grid-template-columns: 1fr 1fr; }
    .cap-grid, .adv-grid { grid-template-columns: 1fr; }
    .footer .top { grid-template-columns: 1fr; gap: 28px; }
    .counters .c-num { font-size: 34px; }
    .section { padding: 52px 0; }
    .hero h1 { font-size: 30px; }
    .hero .container { padding-top: 70px; padding-bottom: 70px; }
    .hero .hero-stats { gap: 26px; }
    .hero .hero-stats .hs-num { font-size: 30px; }
    .pro-card .pic { height: 170px; }
    .page-banner { padding: 48px 0; }
    .page-banner h1 { font-size: 26px; }
    .main-col { padding: 22px 18px; }
}
@media (max-width: 480px) {
    .pro-grid { grid-template-columns: 1fr; }
    .cap-grid, .adv-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 26px; }
}
.pos-1 { margin-left: 40px; }
.pos-2 { margin-left: -25px; }
.pos-3 { margin-left: 20px; }