/*
 * 中吉储能官网（ceshi）—— 前端样式
 * 设计参考行业头部企业站（纽恩泰空气能 https://www.ne01.com）的版式语言：
 * 白底 + 深蓝主色 + 大量留白 + 大标题（英文小标 + 中文大标）+ 卡片式业务矩阵
 * 不含任何第三方框架，单文件即可
 */

:root {
    --c-primary: #0e5aa7;
    --c-primary-d: #0a4278;
    --c-primary-l: #eaf2fb;
    --c-green: #0f9d76;
    --c-orange: #ff7a1a;
    --c-dark: #0a1f33;
    --c-text: #1f2d3d;
    --c-sub: #64748b;
    --c-line: #e6edf5;
    --c-bg: #f5f8fb;
    --radius: 14px;
    --shadow: 0 8px 30px rgba(14, 90, 167, .10);
    --shadow-hover: 0 16px 44px rgba(14, 90, 167, .18);
    --w: 1200px;
    --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--c-text);
    background: #fff;
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color .2s; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap { width: min(var(--w), calc(100% - 48px)); margin: 0 auto; }

/* ---------------------------------------------------------------- 顶部信息条 */
.topbar {
    background: var(--c-dark);
    color: rgba(255, 255, 255, .78);
    font-size: 13px;
}
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; height: 38px; gap: 16px; }
.topbar a:hover { color: #fff; }
.topbar .tb-right { display: flex; align-items: center; gap: 18px; }
.topbar .tb-tel { color: #fff; font-weight: 600; letter-spacing: .3px; }

/* ---------------------------------------------------------------- 头部导航 */
.header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--c-line);
}
.header .wrap { display: flex; align-items: center; height: 76px; gap: 28px; }
.logo { display: flex; align-items: center; gap: 10px; flex: none; }
.logo-mark {
    width: 40px; height: 40px; border-radius: 11px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-green));
    color: #fff; font-weight: 800; font-size: 19px;
    display: grid; place-items: center; letter-spacing: -1px;
}
.logo-img { width: 44px; height: 44px; object-fit: contain; display: block; flex: none; }
.foot-brand .logo-img { width: 46px; height: 46px; background: #fff; border-radius: 10px; padding: 4px; box-sizing: content-box; }
.logo-txt b { display: block; font-size: 18px; letter-spacing: .5px; line-height: 1.2; }
.logo-txt span { display: block; font-size: 11px; color: var(--c-sub); letter-spacing: 1.6px; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav > li { position: relative; }
.nav > li > a {
    display: block; padding: 0 16px; height: 76px; line-height: 76px;
    font-size: 16px; font-weight: 500; color: var(--c-text); white-space: nowrap;
}
.nav > li > a:hover, .nav > li.active > a { color: var(--c-primary); }
.nav > li.active > a::after {
    content: ""; position: absolute; left: 16px; right: 16px; bottom: 0; height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-green)); border-radius: 3px 3px 0 0;
}
.subnav {
    position: absolute; top: 100%; left: 0; min-width: 200px; background: #fff;
    border-radius: 0 0 12px 12px; box-shadow: var(--shadow); padding: 8px;
    opacity: 0; visibility: hidden; transform: translateY(8px); transition: .22s;
}
.nav > li:hover .subnav { opacity: 1; visibility: visible; transform: translateY(0); }
.subnav a { display: block; padding: 9px 14px; border-radius: 8px; font-size: 14.5px; color: var(--c-text); }
.subnav a:hover { background: var(--c-primary-l); color: var(--c-primary); }

.hd-tel { display: flex; align-items: center; gap: 10px; flex: none; padding-left: 22px; border-left: 1px solid var(--c-line); }
.hd-tel .ico {
    width: 38px; height: 38px; border-radius: 50%; background: var(--c-primary-l);
    color: var(--c-primary); display: grid; place-items: center; font-size: 17px;
}
.hd-tel small { display: block; font-size: 12px; color: var(--c-sub); line-height: 1.2; }
.hd-tel b { font-size: 19px; color: var(--c-primary); letter-spacing: .4px; }

.burger { display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; margin-left: auto; }
.burger span { display: block; height: 2px; background: var(--c-text); margin: 5px 9px; border-radius: 2px; transition: .25s; }

/* ---------------------------------------------------------------- 首页大幻灯 */
.hero { position: relative; height: 560px; overflow: hidden; background: var(--c-dark); }
.hero-slide {
    position: absolute; inset: 0; opacity: 0; transition: opacity .9s ease;
    display: grid; align-items: center;
}
.hero-slide.on { opacity: 1; }
.hero-slide .bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero-slide::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(100deg, rgba(6, 26, 45, .88) 0%, rgba(6, 26, 45, .55) 45%, rgba(6, 26, 45, .18) 100%);
}
.hero-slide .inner { position: relative; z-index: 2; color: #fff; max-width: 720px; }
.hero-kicker { font-size: 13px; letter-spacing: 4px; text-transform: uppercase; color: rgba(255,255,255,.7); margin-bottom: 18px; }
.hero h1 { font-size: 46px; line-height: 1.24; margin: 0 0 18px; font-weight: 800; letter-spacing: 1px; }
.hero p { font-size: 17px; color: rgba(255,255,255,.86); margin: 0 0 30px; max-width: 560px; }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; gap: 8px; height: 50px; padding: 0 30px;
    border-radius: 999px; font-size: 15.5px; font-weight: 600; border: 1px solid transparent;
    cursor: pointer; transition: .22s;
}
.btn-main { background: var(--c-primary); color: #fff; box-shadow: 0 10px 26px rgba(14, 90, 167, .35); }
.btn-main:hover { background: var(--c-primary-d); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .14); }
.hero-dots { position: absolute; left: 50%; transform: translateX(-50%); bottom: 26px; display: flex; gap: 10px; z-index: 5; }
.hero-dots button {
    width: 34px; height: 4px; border-radius: 3px; border: 0; cursor: pointer;
    background: rgba(255, 255, 255, .38); transition: .25s;
}
.hero-dots button.on { background: #fff; }

/* ---------------------------------------------------------------- 通用区块标题 */
.sec { padding: 88px 0; }
.sec.gray { background: var(--c-bg); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .en { font-size: 13px; letter-spacing: 4px; text-transform: uppercase; color: var(--c-primary); font-weight: 600; }
.sec-head h2 { font-size: 36px; margin: 12px 0 0; letter-spacing: 1px; font-weight: 800; }
.sec-head .line { width: 54px; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--c-primary), var(--c-green)); margin: 20px auto 0; }
.sec-head p { color: var(--c-sub); margin: 16px auto 0; max-width: 720px; font-size: 15.5px; }
.sec-head.left { text-align: left; }
.sec-head.left .line { margin-left: 0; }

/* ---------------------------------------------------------------- 业务领域 */
.domains { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.domain {
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
    padding: 32px 20px; text-align: center; transition: .25s; position: relative; overflow: hidden;
}
.domain::before {
    content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-green)); transform: scaleX(0); transform-origin: left; transition: .3s;
}
.domain:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.domain:hover::before { transform: scaleX(1); }
.domain .ico {
    width: 62px; height: 62px; margin: 0 auto 16px; border-radius: 18px;
    background: var(--c-primary-l); display: grid; place-items: center;
    transition: transform .3s cubic-bezier(.2,.7,.3,1), box-shadow .3s;
}
.domain .ico svg {
    width: 33px; height: 33px; stroke: currentColor; fill: none;
    stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
.domain:hover .ico { transform: translateY(-3px) scale(1.05); }
.domain h3 { font-size: 17.5px; margin: 0 0 6px; }
.domain p { font-size: 13.5px; color: var(--c-sub); margin: 0; line-height: 1.6; }

/* ---------------------------------------------------------------- 解决方案（左图右文） */
.solution { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.solution + .solution { margin-top: 84px; }
.solution.rev .sol-media { order: 2; }
.sol-media { border-radius: 20px; overflow: hidden; box-shadow: var(--shadow); position: relative; aspect-ratio: 4 / 3; }
.sol-media img { width: 100%; height: 100%; object-fit: cover; }
.sol-body h3 { font-size: 30px; margin: 0 0 8px; font-weight: 800; letter-spacing: .5px; }
.sol-body .sub { color: var(--c-primary); font-weight: 600; margin: 0 0 20px; }
.sol-body .desc { color: var(--c-sub); margin: 0 0 26px; }
.feats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; margin-bottom: 30px; }
.feat { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.feat .dot { width: 22px; height: 22px; border-radius: 50%; background: var(--c-green); color: #fff; font-size: 12px; display: grid; place-items: center; flex: none; margin-top: 4px; }
.link-more { display: inline-flex; align-items: center; gap: 8px; color: var(--c-primary); font-weight: 600; }
.link-more:hover { gap: 14px; }

/* ---------------------------------------------------------------- 公司矩阵 */
.companies { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.co-card {
    background: #fff; border-radius: var(--radius); border: 1px solid var(--c-line);
    padding: 30px 26px; transition: .25s; display: flex; flex-direction: column;
}
.co-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.co-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.co-logo .mark { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 18px; }
.co-logo .mark-img {
    width: 46px; height: 46px; border-radius: 13px; object-fit: contain;
    background: #fff; padding: 3px; box-sizing: content-box; flex: none;
    box-shadow: 0 2px 10px rgba(15, 42, 80, .08);
}
.co-logo .mark-img.lg { width: 64px; height: 64px; border-radius: 18px; padding: 4px; }

.co-card h3 { font-size: 18px; margin: 0 0 4px; line-height: 1.45; }
.co-card .slogan { font-size: 13.5px; color: var(--c-sub); margin: 0 0 14px; }
.co-card .intro { font-size: 14px; color: var(--c-sub); flex: 1; }
.co-meta { border-top: 1px dashed var(--c-line); margin-top: 18px; padding-top: 16px; font-size: 14px; display: grid; gap: 8px; }
.co-meta .row { display: flex; gap: 8px; align-items: baseline; }
.co-meta .k { color: var(--c-sub); flex: none; width: 42px; font-size: 13px; }
.co-meta .v { font-weight: 600; }
.co-meta .tel { color: var(--c-primary); font-size: 16.5px; letter-spacing: .3px; }

/* ---------------------------------------------------------------- 案例 */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4 / 3; background: var(--c-dark); }
.case img { width: 100%; height: 100%; object-fit: cover; transition: .5s; opacity: .92; }
.case:hover img { transform: scale(1.06); opacity: 1; }
.case .cap {
    position: absolute; inset: auto 0 0 0; padding: 26px 22px 20px; color: #fff;
    background: linear-gradient(transparent, rgba(4, 20, 35, .88));
}
.case .cap h4 { margin: 0 0 4px; font-size: 17px; }
.case .cap p { margin: 0; font-size: 13px; color: rgba(255, 255, 255, .78); }

/* ---------------------------------------------------------------- 新闻 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border-radius: var(--radius); border: 1px solid var(--c-line); overflow: hidden; transition: .25s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.news-card .cover { aspect-ratio: 16 / 10; overflow: hidden; background: var(--c-primary-l); }
.news-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.news-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .tag { font-size: 12px; color: var(--c-primary); background: var(--c-primary-l); border-radius: 999px; padding: 3px 10px; align-self: flex-start; margin-bottom: 12px; }
.news-card h3 { font-size: 17.5px; margin: 0 0 10px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card p { font-size: 14px; color: var(--c-sub); margin: 0 0 16px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .date { font-size: 13px; color: #94a3b8; border-top: 1px dashed var(--c-line); padding-top: 14px; display: flex; justify-content: space-between; }

/* ---------------------------------------------------------------- 团队 */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.member { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--c-line); transition: .25s; }
.member:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.member .ph { aspect-ratio: 3 / 3.4; background: var(--c-bg); position: relative; overflow: hidden; }
.member .ph img { width: 100%; height: 100%; object-fit: cover; }
.member .ph .initial {
    position: absolute; inset: 0; display: grid; place-items: center;
    font-size: 54px; font-weight: 800; color: #fff;
    background: linear-gradient(135deg, var(--c-primary), var(--c-green));
}
.member .info { padding: 18px 20px 22px; text-align: center; }
.member .info h3 { margin: 0 0 4px; font-size: 17px; }
.member .info .role { font-size: 13.5px; color: var(--c-primary); }
.member .info .co { font-size: 12.5px; color: var(--c-sub); margin-top: 6px; }

/* ---------------------------------------------------------------- 联系 / CTA 带 */
.cta-band { background: linear-gradient(120deg, var(--c-primary-d), var(--c-primary) 55%, var(--c-green)); color: #fff; position: relative; overflow: hidden; }
.cta-band::after {
    content: ""; position: absolute; right: -80px; top: -80px; width: 380px; height: 380px;
    border-radius: 50%; background: rgba(255, 255, 255, .08);
}
.cta-band .wrap { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 52px 0; flex-wrap: wrap; }
.cta-band h3 { font-size: 27px; margin: 0 0 8px; }
.cta-band p { margin: 0; color: rgba(255, 255, 255, .82); }
.cta-tel { font-size: 34px; font-weight: 800; letter-spacing: 1px; }

/* ---------------------------------------------------------------- 页脚 */
.footer { background: var(--c-dark); color: rgba(255, 255, 255, .68); padding: 64px 0 0; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 46px; }
.footer h4 { color: #fff; font-size: 16px; margin: 0 0 18px; font-weight: 600; }
.footer li { margin-bottom: 10px; }
.footer a:hover { color: #fff; }
.foot-brand .logo-txt b { color: #fff; }
.foot-brand .logo-txt span { color: rgba(255, 255, 255, .5); }
.foot-brand p { margin: 16px 0 0; line-height: 1.9; }
.foot-tel { color: #fff; font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.foot-bottom {
    border-top: 1px solid rgba(255, 255, 255, .12); padding: 20px 0 26px;
    display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px;
    color: rgba(255, 255, 255, .5);
}
.foot-bottom a:hover { color: #fff; }

/* ---------------------------------------------------------------- 右侧浮动 */
.float-bar { position: fixed; right: 18px; bottom: 90px; z-index: 70; display: flex; flex-direction: column; gap: 10px; }
.float-bar a, .float-bar button {
    width: 54px; height: 54px; border-radius: 15px; background: #fff; border: 1px solid var(--c-line);
    box-shadow: var(--shadow); display: grid; place-items: center; color: var(--c-primary);
    font-size: 12px; line-height: 1.1; text-align: center; cursor: pointer; transition: .22s; padding: 4px;
}
.float-bar a:hover, .float-bar button:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); transform: translateY(-2px); }
.float-bar .em { font-size: 20px; display: block; }

/* ---------------------------------------------------------------- 内页头图 */
.page-hero {
    background: linear-gradient(120deg, #0a2f52, #0e5aa7 60%, #0f9d76);
    color: #fff; padding: 66px 0; position: relative; overflow: hidden;
}
.page-hero::after {
    content: ""; position: absolute; right: -60px; bottom: -120px; width: 340px; height: 340px;
    border-radius: 50%; background: rgba(255, 255, 255, .07);
}
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: 34px; margin: 0 0 10px; letter-spacing: 1px; }
.page-hero .crumb { font-size: 13.5px; color: rgba(255, 255, 255, .72); }
.page-hero .crumb a:hover { color: #fff; }

/* ---------------------------------------------------------------- 内容排版 */
.prose { font-size: 16.5px; color: #334155; }
.prose p { margin: 0 0 20px; }
.prose h2 { font-size: 24px; margin: 38px 0 16px; }
.prose h3 { font-size: 20px; margin: 30px 0 12px; }
.prose img { border-radius: 12px; margin: 22px 0; }
.prose ul, .prose ol { margin: 0 0 20px 22px; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 8px; }
.prose blockquote {
    margin: 22px 0; padding: 16px 22px; border-left: 3px solid var(--c-primary);
    background: var(--c-primary-l); border-radius: 0 10px 10px 0; color: #33506e;
}

.news-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.two-col { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
.side-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 24px; }
.side-card + .side-card { margin-top: 22px; }
.side-card h4 { margin: 0 0 16px; font-size: 17px; padding-bottom: 12px; border-bottom: 1px solid var(--c-line); }
.side-list li { padding: 11px 0; border-bottom: 1px dashed var(--c-line); font-size: 14.5px; }
.side-list li:last-child { border-bottom: 0; }
.side-list a { display: flex; justify-content: space-between; gap: 12px; }
.side-list a:hover { color: var(--c-primary); }
.side-list .d { color: #94a3b8; font-size: 12.5px; flex: none; }

/* 文章详情 */
.article-head { margin-bottom: 34px; padding-bottom: 24px; border-bottom: 1px solid var(--c-line); }
.article-head h1 { font-size: 32px; margin: 0 0 16px; line-height: 1.4; }
.article-meta { display: flex; gap: 22px; color: var(--c-sub); font-size: 13.5px; flex-wrap: wrap; }
.article-meta .tag { color: var(--c-primary); background: var(--c-primary-l); border-radius: 999px; padding: 2px 12px; }

/* 公司详情 */
.co-hero { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.co-contact-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.co-contact-card .hd { padding: 22px 24px; color: #fff; }
.co-contact-card .hd small { opacity: .82; font-size: 13px; }
.co-contact-card .hd .tel { font-size: 26px; font-weight: 800; letter-spacing: .5px; margin-top: 4px; }
.co-contact-card .bd { padding: 20px 24px 24px; display: grid; gap: 14px; font-size: 14.5px; }
.co-contact-card .bd .k { color: var(--c-sub); font-size: 12.5px; }
.co-contact-card .bd .v { font-weight: 600; word-break: break-all; }

.pills { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }
.pill {
    padding: 8px 18px; border-radius: 999px; border: 1px solid var(--c-line);
    background: #fff; font-size: 14px; color: var(--c-text); cursor: pointer;
}
.pill.on, .pill:hover { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

.empty { text-align: center; color: var(--c-sub); padding: 60px 0; }

/* 分页 */
.pager { display: flex; gap: 8px; justify-content: center; margin-top: 48px; flex-wrap: wrap; }
.pager a, .pager span {
    min-width: 42px; height: 42px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--c-line);
    display: grid; place-items: center; font-size: 14px; color: var(--c-text); background: #fff;
}
.pager a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pager .cur { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px;
  max-width: 940px; margin: 0 auto; align-items: start; }
.contact-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 30px 26px; text-align: center; }
.contact-card .ico { width: 58px; height: 58px; border-radius: 18px; margin: 0 auto 16px; background: var(--c-primary-l); color: var(--c-primary); display: grid; place-items: center; }
.contact-card .ico svg, .float-bar .em svg {
    width: 27px; height: 27px; stroke: currentColor; fill: none;
    stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
.hd-tel .ico svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.float-bar .em { display: grid; place-items: center; }
.float-bar .em svg { width: 22px; height: 22px; }
.contact-card h3 { margin: 0 0 8px; font-size: 17px; }
.contact-card .big { font-size: 21px; font-weight: 700; color: var(--c-primary); letter-spacing: .4px; }
.contact-card p { margin: 8px 0 0; font-size: 14px; color: var(--c-sub); word-break: break-all; }

/* 关于页数据带 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 28px 22px; text-align: center; }
.stat b { display: block; font-size: 34px; color: var(--c-primary); letter-spacing: 1px; }
.stat span { font-size: 14px; color: var(--c-sub); }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1080px) {
    .domains { grid-template-columns: repeat(2, 1fr); }
    .companies, .news-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(3, 1fr); }
    .solution { grid-template-columns: 1fr; gap: 30px; }
    .solution.rev .sol-media { order: 0; }
    .two-col, .co-hero { grid-template-columns: 1fr; }
    .foot-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 36px; }
    .hero { height: 480px; }
}

@media (max-width: 820px) {
    body { font-size: 15.5px; }
    .topbar { display: none; }
    .header .wrap { height: 64px; }
    .nav {
        position: fixed; inset: 64px 0 auto 0; background: #fff; flex-direction: column;
        align-items: stretch; padding: 10px 16px 20px; gap: 0; box-shadow: var(--shadow);
        max-height: calc(100vh - 64px); overflow: auto; transform: translateY(-12px);
        opacity: 0; visibility: hidden; transition: .25s; margin-left: 0;
    }
    .nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav > li > a { height: auto; line-height: 1.4; padding: 15px 6px; border-bottom: 1px solid var(--c-line); }
    .nav > li.active > a::after { display: none; }
    .subnav { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; padding: 0 0 8px 12px; display: none; }
    .nav > li:hover .subnav { display: none; }
    .subnav a { padding: 8px 6px; font-size: 14px; color: var(--c-sub); }
    .burger { display: block; }
    .hd-tel { display: none; }
    .hero { height: 430px; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; }
    .sec { padding: 56px 0; }
    .sec-head h2 { font-size: 26px; }
    .domains { grid-template-columns: repeat(2, 1fr); }
    .companies, .news-grid, .contact-grid, .cases, .team-grid { grid-template-columns: 1fr; }
    .feats { grid-template-columns: 1fr; }
    .cta-band .wrap { flex-direction: column; align-items: flex-start; }
    .foot-grid { grid-template-columns: 1fr; gap: 30px; }
    .float-bar { right: 10px; bottom: 76px; }
    .float-bar a, .float-bar button { width: 46px; height: 46px; border-radius: 12px; }
    .article-head h1 { font-size: 24px; }
    .stats { grid-template-columns: repeat(2, 1fr); }
}

/* ---------------------------------------------------------------- 移动端优化（2026-10-20） */
@media (max-width: 820px) {
    /* 菜单打开时锁住页面滚动 */
    body.nav-open { overflow: hidden; }

    /* 汉堡按钮：原来 span 宽度算成 0，三横线根本看不见 → 手机上打不开导航 */
    .burger { flex: 0 0 auto; width: 44px; height: 44px; padding: 0; margin-left: auto; }
    .burger span { display: block; width: 20px; height: 2px; margin: 4px auto; }

    /* 右侧悬浮条改底部通栏：不再压住正文与表单 */
    body { padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)); }
    .float-bar {
        left: 10px; right: 10px; bottom: calc(10px + env(safe-area-inset-bottom, 0px));
        flex-direction: row; gap: 8px; width: auto;
    }
    .float-bar a, .float-bar button {
        flex: 1 1 0; width: auto; height: 46px; border-radius: 12px;
        display: flex; align-items: center; justify-content: center; gap: 7px;
        font-size: 13.5px; padding: 0 6px;
    }
    .float-bar .em svg { width: 19px; height: 19px; }

    /* 首页 hero：略高一点给内容呼吸空间，并收敛文案字号 */
    .hero { height: 466px; }
    .hero p { font-size: 14.5px; line-height: 1.72; }
    .hero-kicker { font-size: 11.5px; letter-spacing: 2px; }

    /* 正文可读性 */
    .prose { font-size: 16px; line-height: 1.8; }
    .prose img { max-width: 100%; height: auto; }
    .prose table { display: block; max-width: 100%; overflow-x: auto; }
    .prose h2 { font-size: 21px; }
    .prose h3 { font-size: 18px; }

    /* 区块节奏与卡片内边距 */
    .sec { padding: 48px 0; }
    .domain { padding: 26px 16px; }
    .domain .ico { width: 56px; height: 56px; margin-bottom: 14px; }
    .domain .ico svg { width: 30px; height: 30px; }

    /* 长公司名换行更自然 */
    .co-logo strong { word-break: break-word; line-height: 1.35; }

    /* 新闻列表：双列在手机上太挤，收成一列 */
    .news-grid.cols-2 { grid-template-columns: 1fr; }
    /* 筛选条：公司多时横向可滑，不撑破布局 */
    .pills { display: flex; flex-wrap: wrap; gap: 8px; }
    .pill { font-size: 13px; padding: 7px 12px; }

    /* 表单两列改单列（联系页「您的称呼 / 联系电话」） */
    .form-row { grid-template-columns: 1fr !important; gap: 14px !important; }
    /* 表单提交按钮整行，手机上更好点 */
    form.side-card .btn-main { width: 100%; }

    /* 页脚链接触摸区域（原来行高只有 15px，手机难点） */
    .footer li { margin-bottom: 2px; }
    .footer li a { display: inline-flex; align-items: center; min-height: 38px; }
    .foot-bottom { font-size: 12.5px; line-height: 1.9; }
    .foot-bottom a { display: inline-flex; align-items: center; min-height: 34px; }
}

@media (max-width: 420px) {
    .hero h1 { font-size: 25px; }
    .sec-head h2 { font-size: 23px; }
    .domains { gap: 12px; }
    .domain h3 { font-size: 16px; }
    .domain p { font-size: 13px; line-height: 1.55; }
    .hero .btn-row { gap: 10px; }
}