/* ==========================================================================
   联创博远集团官网 · 主样式
   设计方向：深蓝金 · 央企正式版
   维护说明：颜色/字号都集中在 :root，改一处全站生效。
   ========================================================================== */

:root{
  --navy-900:#0B1F38; --navy-800:#12294A; --navy-700:#1F487C; --navy-500:#4F81BC;
  --blue-600:#004E7C; --gold:#FFC000; --gold-deep:#BF9222; --gold-soft:#E9C776;
  --paper:#F7F5F1; --paper-2:#F1EEE8; --line:#E3DED4; --line-strong:#CFC8BB;
  --ink:#141A22; --graphite:#5B6673; --muted:#8A929B; --white:#fff;
  --serif:"Noto Serif SC","Songti SC",SimSun,serif;
  --sans:"Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --wrap:1240px;
  --shadow:0 18px 44px rgba(11,31,56,.12);
  --radius:2px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--gold-deep);outline-offset:3px}
.wrap{width:min(var(--wrap),calc(100% - 96px));margin:0 auto}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy-900);color:#fff;padding:10px 18px;z-index:100}
.skip:focus{left:12px;top:12px}

h1,h2,h3,h4{font-family:var(--serif);font-weight:700;letter-spacing:.01em;line-height:1.35}
p{max-width:72ch}

/* ---------- 通用小部件 ---------- */
.eyebrow{font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--gold-deep);font-weight:500;display:inline-block}
.eyebrow.on-dark{color:var(--gold-soft)}
.rule{width:64px;height:3px;background:var(--gold);display:block}
.rule.sm{width:36px;height:2px}
.muted{color:var(--graphite)}
.small{font-size:13px}
.note{color:var(--muted);font-size:12.5px;letter-spacing:.02em;line-height:1.9}
.tag{display:inline-block;font-size:11.5px;letter-spacing:.08em;color:var(--graphite);border:1px solid var(--line);padding:3px 10px;background:#fff}
.tag.gold{color:#7A5A10;border-color:rgba(191,146,34,.4);background:rgba(255,192,0,.08)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:48px;padding:0 26px;border-radius:var(--radius);font-size:15px;font-weight:500;letter-spacing:.04em;transition:.25s;border:1px solid transparent;white-space:nowrap}
.btn-gold{background:var(--gold);color:#20180A}
.btn-gold:hover{background:var(--gold-soft)}
.btn-ghost{border-color:rgba(255,255,255,.32);color:#fff}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn-line{border-color:var(--navy-700);color:var(--navy-700)}
.btn-line:hover{background:var(--navy-700);color:#fff}
.btn-navy{background:var(--navy-900);color:#fff}
.btn-navy:hover{background:var(--navy-700)}
.btn.sm{height:40px;padding:0 18px;font-size:13.5px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--navy-700);border-bottom:1px solid transparent}
.link-arrow::after{content:"→";transition:transform .2s}
.link-arrow:hover::after{transform:translateX(5px)}

/* ---------- 顶部信息条 ---------- */
.util{background:var(--navy-900);color:#B9C6D8;font-size:12.5px;letter-spacing:.05em}
.util .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:20px}
.util b{color:#fff;font-weight:500}
.util .util-r{display:flex;gap:22px;color:#8FA3BF}

/* ---------- 页头 ---------- */
header{background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:60}
header.scrolled{box-shadow:0 8px 24px rgba(11,31,56,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:88px;gap:24px}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0}
.brand img{height:44px;width:auto}.brand .divider{width:1px;height:30px;background:var(--line)}
.brand .tagline{font-size:12px;color:var(--graphite);letter-spacing:.1em;line-height:1.5}
.menu{display:flex;gap:34px;font-size:15px;color:#2B3440}
.menu > a,.menu > .nav-item > a{position:relative;padding:6px 0;white-space:nowrap}
.menu > a::after,.menu > .nav-item > a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--gold);transition:right .25s}
.menu > a:hover::after,.menu > .nav-item > a:hover::after,.menu > a[aria-current="page"]::after,.menu > .nav-item > a[aria-current="page"]::after{right:0}
.menu > a[aria-current="page"],.menu > .nav-item > a[aria-current="page"]{color:var(--navy-700);font-weight:500}
.menu > a[aria-current="page"]::after,.menu > .nav-item > a[aria-current="page"]::after{background:var(--navy-700)}
.head-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动端抽屉 */
.drawer{display:none;position:fixed;inset:0;background:var(--navy-900);color:#fff;z-index:70;padding:28px 24px;overflow:auto}
.drawer.open{display:block}
.drawer .drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.drawer .drawer-head img{height:40px;width:auto}
.drawer .close{width:44px;height:44px;border:1px solid rgba(255,255,255,.25);color:#fff;font-size:22px;display:flex;align-items:center;justify-content:center}
.drawer nav > a, .drawer nav > .drawer-main{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:19px;font-family:var(--serif)}
.drawer nav > a::after, .drawer nav > .drawer-main::after{content:"→";color:var(--gold);font-family:var(--sans);font-size:14px}
.drawer .drawer-foot{margin-top:32px;display:flex;flex-direction:column;gap:12px;color:#A9B9CE;font-size:13.5px}

/* ---------- 首页主视觉 ---------- */
.hero{position:relative;background:var(--navy-900);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(1200px 560px at 78% 10%,rgba(79,129,188,.28),transparent 62%),
  radial-gradient(700px 420px at 12% 92%,rgba(0,78,124,.35),transparent 60%)}
.hero::after{content:"";position:absolute;left:-10%;top:-30%;width:70%;height:160%;transform:rotate(18deg);
  background:linear-gradient(90deg,rgba(255,192,0,.06),rgba(255,192,0,0));pointer-events:none}
.hero .wrap{position:relative;padding:92px 0 84px;display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.hero h1{font-size:clamp(34px,4.3vw,62px);line-height:1.26;letter-spacing:.02em;margin:22px 0 0}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero .rule{margin:30px 0 26px}
.hero .lead{color:#C3CFDF;font-size:17px;line-height:1.95;max-width:590px}
.hero .actions{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.hero .meta{margin-top:44px;display:flex;gap:34px;color:#8FA3BF;font-size:12.5px;letter-spacing:.06em;flex-wrap:wrap}
.hero .meta b{display:block;color:#fff;font-family:var(--serif);font-size:22px;letter-spacing:0;margin-top:4px}
.hero-art{position:relative;height:430px;display:flex;align-items:center;justify-content:center}
.hero-art .net-art{width:100%;height:100%;overflow:visible}
.hero-art .pulse{animation:heroPulse 3.6s ease-out infinite;transform-origin:center}
@keyframes heroPulse{0%{r:8;opacity:.8}70%{r:30;opacity:0}100%{r:30;opacity:0}}
.hero-art .cap{position:absolute;right:0;bottom:0;background:rgba(10,26,46,.82);border:1px solid rgba(255,192,0,.28);padding:18px 22px;min-width:250px;backdrop-filter:blur(6px)}
.hero-art .cap span{display:block;font-size:11px;letter-spacing:.2em;color:var(--gold-soft)}
.hero-art .cap strong{font-family:var(--serif);font-size:30px;color:#fff;display:block;margin-top:6px}
.hero-art .cap small{color:#9FB2CA;font-size:12.5px}

/* ---------- 数据条 ---------- */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 0 32px 34px;border-right:1px solid var(--line)}
.stat:first-child{padding-left:0}
.stat:last-child{border-right:0}
.stat b{font-family:var(--serif);font-size:40px;color:var(--navy-700);display:block;line-height:1.1}
.stat b i{font-style:normal;font-size:18px;margin-left:2px}
.stat span{font-size:13.5px;color:var(--graphite);letter-spacing:.04em}

/* ---------- 区块 ---------- */
.sec{padding:104px 0}
.sec.tight{padding:72px 0}
.sec.paper{background:var(--paper)}
.sec.white{background:#fff}
.sec-head{display:grid;grid-template-columns:1fr .9fr;gap:60px;align-items:end;margin-bottom:54px}
.sec-head h2{font-size:clamp(28px,3vw,42px);line-height:1.32;margin-top:18px}
.sec-head p{color:var(--graphite);font-size:15.5px;line-height:1.95}

/* ---------- 业务卡片 ---------- */
.biz{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.biz article{background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:38px 34px 34px;position:relative;transition:.28s;display:flex;flex-direction:column}
.biz article:hover{background:var(--navy-900);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.biz article:hover .num,.biz article:hover p{color:#B9C6D8}
.biz .num{font-family:var(--serif);font-size:13px;letter-spacing:.18em;color:var(--gold-deep)}
.biz h3{font-size:23px;margin:16px 0 12px;transition:.2s}
.biz article:hover h3{color:#fff}
.biz p{color:var(--graphite);font-size:14.5px;line-height:1.85;min-height:84px;flex:1}
.biz .more{margin-top:10px}

/* ---------- 深色交付带 ---------- */
.band{background:var(--navy-900);color:#fff;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;left:0;top:0;bottom:0;width:44%;background:linear-gradient(120deg,rgba(255,192,0,.08),transparent 70%)}
.band .wrap{position:relative;padding:92px 0 96px;display:grid;grid-template-columns:.9fr 1.4fr;gap:70px}
.band h2{font-size:clamp(26px,2.6vw,36px);line-height:1.45;margin-top:18px}
.band .side p{color:#A9B9CE;font-size:14.5px;margin-top:22px;line-height:1.95}
.steps{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid rgba(255,255,255,.14)}
.step{padding:0 28px;border-right:1px solid rgba(255,255,255,.14)}
.step b{font-family:var(--serif);font-size:15px;color:var(--gold);letter-spacing:.14em}
.step h3{font-family:var(--sans);font-size:19px;font-weight:500;margin:16px 0 12px}
.step p{color:#9FB2CA;font-size:13.5px;line-height:1.9}

/* ---------- 客户 ---------- */
.clients{background:#fff;border-top:1px solid var(--line)}
.clients .wrap{padding:76px 0 84px}
.client-grid{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);margin-top:38px}
.client-grid span{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 12px;text-align:center;color:#4A5563;font-size:14.5px;letter-spacing:.04em;transition:.2s}
.client-grid span:hover{background:var(--paper);color:var(--navy-700)}
.clients .note{margin-top:18px}

/* ---------- 案例卡片 ---------- */
.cases{display:grid;grid-template-columns:1.25fr 1fr;gap:28px}
.case{background:#fff;border:1px solid var(--line);padding:40px;position:relative;overflow:hidden}
.case .tag-line{font-size:12px;letter-spacing:.18em;color:var(--gold-deep)}
.case h3{font-size:26px;margin:16px 0 14px;line-height:1.45}
.case p{color:var(--graphite);font-size:14.5px;line-height:1.9;max-width:520px}
.case .kpi{display:flex;gap:40px;margin-top:30px;padding-top:26px;border-top:1px solid var(--line);flex-wrap:wrap}
.case .kpi b{font-family:var(--serif);font-size:30px;color:var(--navy-700);display:block}
.case .kpi span{font-size:12.5px;color:var(--muted)}
.case .glow{position:absolute;right:-60px;bottom:-90px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle at 30% 30%,rgba(31,72,124,.14),transparent 68%)}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(100deg,var(--navy-900),#123459 62%,#1F487C);color:#fff}
.cta .wrap{padding:70px 0;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{font-size:clamp(24px,2.4vw,34px);line-height:1.4}
.cta p{color:#B9C6D8;font-size:14.5px;margin-top:10px}

/* ---------- 页脚 ---------- */
footer{background:#08182C;color:#8FA3BF;font-size:13.5px}
.foot{display:grid;grid-template-columns:1.4fr .7fr .7fr 1.1fr;gap:50px;padding:66px 0 46px}
.foot img{height:46px;width:auto;margin-bottom:20px}
.foot h4{color:#fff;font-size:14px;font-weight:500;letter-spacing:.1em;margin-bottom:16px}
.foot li{margin-bottom:10px}
.foot a:hover{color:var(--gold-soft)}
.foot .addr{line-height:2;color:#7E92AC;max-width:none}
.copy{border-top:1px solid rgba(255,255,255,.08);padding:20px 0 26px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#647A96;font-size:12.5px}

/* ---------- 内页 banner ---------- */
.page-hero{background:var(--navy-900);color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(900px 400px at 82% 0%,rgba(79,129,188,.26),transparent 60%),
  radial-gradient(600px 320px at 8% 100%,rgba(0,78,124,.3),transparent 62%)}
.page-hero::after{content:"";position:absolute;right:-8%;top:-40%;width:46%;height:180%;transform:rotate(18deg);background:linear-gradient(90deg,rgba(255,192,0,.07),transparent 70%)}
.page-hero .wrap{position:relative;padding:70px 0 64px}
.crumbs{display:flex;gap:10px;align-items:center;font-size:12.5px;color:#8FA3BF;letter-spacing:.04em;margin-bottom:26px}
.crumbs a:hover{color:var(--gold-soft)}
.crumbs .sep{color:#4E6482}
.page-hero h1{font-size:clamp(32px,3.6vw,52px);line-height:1.28;letter-spacing:.02em}
.page-hero .lead{color:#B9C6D8;font-size:16px;margin-top:20px;max-width:760px;line-height:1.95}
.page-hero .kpis{display:flex;gap:48px;margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14);flex-wrap:wrap}
.page-hero .kpis div b{display:block;font-family:var(--serif);font-size:30px;color:#fff}
.page-hero .kpis div span{font-size:12.5px;color:#8FA3BF;letter-spacing:.06em}

/* ---------- 通用内容块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split.wide{grid-template-columns:1.15fr .85fr}
.split .prose p{margin-bottom:18px;color:var(--graphite);font-size:15.5px;line-height:2}
.split .prose p:last-child{margin-bottom:0}
.split h2{font-size:clamp(26px,2.8vw,38px);line-height:1.4;margin:16px 0 24px}
.panel{background:#fff;border:1px solid var(--line);padding:40px}
.panel.paper{background:var(--paper)}
.panel.navy{background:var(--navy-900);color:#fff;border-color:transparent}
.panel.navy p,.panel.navy li{color:#B9C6D8}
.panel h3{font-size:22px;margin-bottom:16px}
.check-list li{position:relative;padding-left:24px;margin-bottom:12px;color:var(--graphite);font-size:15px;line-height:1.85}
.check-list li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border:1px solid var(--gold-deep);transform:rotate(45deg)}
.panel.navy .check-list li::before{border-color:var(--gold)}
.num-list{counter-reset:n}
.num-list li{position:relative;padding-left:38px;margin-bottom:16px;color:var(--graphite);font-size:15px;line-height:1.85}
.num-list li::before{counter-increment:n;content:counter(n,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--serif);font-size:13px;color:var(--gold-deep);letter-spacing:.1em}

/* 资历 / 证书 */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cert{background:#fff;border:1px solid var(--line);padding:28px 24px;min-height:170px;display:flex;flex-direction:column;justify-content:space-between;transition:.25s}
.cert:hover{border-color:var(--gold-deep);box-shadow:var(--shadow);transform:translateY(-2px)}
.cert .no{font-family:var(--serif);font-size:12px;color:var(--gold-deep);letter-spacing:.16em}
.cert h3{font-size:17px;margin:12px 0 8px}
.cert p{font-size:13px;color:var(--graphite);line-height:1.8}

/* 时间/阶段轴 */
.timeline{border-left:1px solid var(--line-strong);margin-left:8px}
.timeline li{position:relative;padding:0 0 34px 34px}
.timeline li::before{content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;background:var(--paper);border:2px solid var(--navy-700);border-radius:50%}
.timeline .stage{font-family:var(--serif);font-size:13px;letter-spacing:.14em;color:var(--gold-deep)}
.timeline h3{font-size:19px;margin:8px 0 8px}
.timeline p{color:var(--graphite);font-size:14px;line-height:1.9}

/* 行业方案 */
.industry-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.industry{background:#fff;padding:38px 36px;transition:.25s}
.industry:hover{background:var(--paper)}
.industry .who{font-size:12px;letter-spacing:.16em;color:var(--gold-deep)}
.industry h3{font-size:23px;margin:14px 0 14px}
.industry p{color:var(--graphite);font-size:14.5px;line-height:1.9}
.industry .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}

/* 案例详情 */
.case-detail{background:#fff;border:1px solid var(--line);padding:44px;margin-bottom:28px}
.case-detail .top{display:flex;justify-content:space-between;align-items:baseline;gap:24px;flex-wrap:wrap;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:26px}
.case-detail .top .who{font-size:12px;letter-spacing:.16em;color:var(--gold-deep)}
.case-detail h2{font-size:28px;line-height:1.4}
.case-detail .cols{display:grid;grid-template-columns:1.25fr .75fr;gap:44px}
.case-detail h3{font-size:15px;letter-spacing:.1em;color:var(--navy-700);margin:22px 0 10px;font-family:var(--sans);font-weight:500}
.case-detail p{color:var(--graphite);font-size:14.5px;line-height:1.95;margin-bottom:12px}
.case-detail .figs{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:14px}
.case-detail .figs div{background:var(--paper);padding:18px 20px}
.case-detail .figs b{font-family:var(--serif);font-size:28px;color:var(--navy-700);display:block}
.case-detail .figs span{font-size:12px;color:var(--muted)}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px}
.contact-card{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.contact-card div{background:#fff;padding:26px 24px}
.contact-card .k{font-size:12px;letter-spacing:.12em;color:var(--muted);margin-bottom:8px;display:block}
.contact-card .v{font-size:15.5px;line-height:1.8;color:var(--ink)}
.contact-card a.v:hover{color:var(--navy-700)}
.form{background:#fff;border:1px solid var(--line);padding:36px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--graphite);margin-bottom:7px;letter-spacing:.04em}
.field label .req{color:#B3231F}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line-strong);background:var(--paper);padding:12px 14px;font:inherit;font-size:14.5px;color:var(--ink);border-radius:0;transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--navy-700);background:#fff}
.field textarea{min-height:120px;resize:vertical}
.field .err{color:#B3231F;font-size:12px;margin-top:6px;display:none}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:#B3231F}
.field.invalid .err{display:block}
.form .form-note{font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.8}
.form-ok{background:rgba(31,72,124,.07);border:1px solid rgba(31,72,124,.25);padding:14px 16px;font-size:14px;color:var(--navy-700);margin-bottom:18px;display:none}

/* 表格 */
.table{width:100%;border-collapse:collapse;background:#fff;font-size:14px}
.table caption{text-align:left;font-size:13px;color:var(--muted);padding-bottom:10px}
.table th,.table td{border:1px solid var(--line);padding:12px 16px;text-align:left;vertical-align:top}
.table th{background:var(--paper);font-weight:500;color:var(--ink);letter-spacing:.04em;white-space:nowrap}
.table td{color:var(--graphite)}

/* 引用 */
.pullquote{border-left:3px solid var(--gold);padding:6px 0 6px 28px;font-family:var(--serif);font-size:22px;line-height:1.75;color:var(--ink)}
.pullquote .by{display:block;font-family:var(--sans);font-size:12.5px;color:var(--muted);letter-spacing:.1em;margin-top:14px}

/* 404 */
.notfound{min-height:56vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:80px 0}
.notfound .code{font-family:var(--serif);font-size:clamp(80px,14vw,160px);line-height:1;color:var(--navy-700);opacity:.16}
.notfound h1{font-size:30px;margin:10px 0 14px}
.notfound p{color:var(--graphite);margin-bottom:28px}

/* 窄屏 */
@media(max-width:1080px){
  .wrap{width:calc(100% - 56px)}
  .nav{height:76px}
  .menu,.head-cta .btn-line{display:none}
  .nav-toggle{display:flex}
  .util .util-r{display:none}
  .hero .wrap{grid-template-columns:1fr;padding:64px 0 58px;gap:40px}
  .hero-art{height:300px;max-width:520px;margin:0 auto}
  .sec{padding:76px 0}
  .sec-head{grid-template-columns:1fr;gap:18px}
  .biz{grid-template-columns:repeat(2,1fr)}
  .band .wrap{grid-template-columns:1fr;gap:44px}
  .client-grid{grid-template-columns:repeat(3,1fr)}
  .cases{grid-template-columns:1fr}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat{padding-left:24px}
  .foot{grid-template-columns:1fr 1fr;gap:36px}
  .split{grid-template-columns:1fr;gap:36px}
  .split.wide{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .industry-grid{grid-template-columns:1fr}
  .case-detail .cols{grid-template-columns:1fr;gap:20px}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .biz p{min-height:0}
}
@media(max-width:600px){
  .wrap{width:calc(100% - 40px)}
  .util{display:none}
  .brand img{height:36px}
  .brand .divider,.brand .tagline{display:none}
  .hero h1{font-size:32px}
  .hero .actions .btn{flex:1}
  .hero-art{height:260px}
  .biz{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;border-left:0}
  .step{border-right:0;border-top:1px solid rgba(255,255,255,.14);padding:24px 0}
  .client-grid{grid-template-columns:repeat(2,1fr)}
  .cta .wrap{flex-direction:column;align-items:flex-start}
  .foot{grid-template-columns:1fr}
  .sec{padding:56px 0}
  .case{padding:28px}
  .panel,.form,.case-detail{padding:24px}
  .page-hero .wrap{padding:52px 0 46px}
  .page-hero .kpis{gap:28px}
  .contact-card{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:1fr}
  .table{font-size:13px}
  .table th,.table td{padding:10px 12px}
}

/* 动效 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}
@media print{
  header,.util,.cta,footer,.nav-toggle{display:none}
  body{background:#fff}
}

/* ==========================================================================
   v1.2 优化：导航下拉 / 悬浮工具 / 政策模块 / 资质横条 / 四步流程
   ========================================================================== */

/* ---- 导航下拉 ---- */
.nav-item{position:relative;display:flex;align-items:center}
.nav-item > a{display:inline-flex;align-items:center;gap:6px}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.45;transition:.2s}
.nav-item:hover .caret,.nav-item:focus-within .caret{transform:rotate(180deg);opacity:.9}
.dropdown{position:absolute;top:calc(100% + 18px);left:50%;transform:translate(-50%,8px);min-width:210px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 40px rgba(11,31,56,.14);padding:10px 0;opacity:0;visibility:hidden;transition:.2s;z-index:80}
.dropdown::before{content:"";position:absolute;left:0;right:0;top:-20px;height:20px}
.dropdown a{display:block;padding:9px 22px;font-size:14px;color:#2B3440;white-space:nowrap}
.dropdown a:hover{background:var(--paper);color:var(--navy-700)}
.nav-item:hover .dropdown,.nav-item:focus-within .dropdown{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ---- 移动端二级 ---- */
.drawer-sub{display:flex;flex-wrap:wrap;gap:8px;padding:4px 0 16px}
.drawer-sub a{font-size:13px;font-family:var(--sans);padding:5px 11px;border:1px solid rgba(255,255,255,.18);color:#C9D6E6}
.drawer-sub a::after{content:none}

/* ---- 悬浮工具 ---- */
.float-tools{position:fixed;right:20px;bottom:30px;display:flex;flex-direction:column;gap:8px;z-index:90}
.float-tools a,.float-tools button{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:rgba(11,31,56,.92);color:#fff;border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(6px);transition:.2s;cursor:pointer}
.float-tools a:hover,.float-tools button:hover{background:var(--gold);color:#20180A;border-color:var(--gold)}
.float-tools .to-top{opacity:0;visibility:hidden}
.float-tools .to-top.show{opacity:1;visibility:visible}

/* ---- 业务卡片图标 ---- */
.biz .ico{width:30px;height:30px;color:var(--gold-deep);margin-bottom:12px;display:block}
.biz article:hover .ico{color:var(--gold)}

/* ---- 政策与标准 ---- */
.policy-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.policy{background:#fff;padding:36px 34px;display:flex;flex-direction:column;gap:10px;transition:.25s}
.policy:hover{background:var(--paper)}
.policy .p-tag{font-family:var(--serif);font-size:12px;letter-spacing:.14em;color:var(--gold-deep)}
.policy h3{font-size:22px;line-height:1.45}
.policy p{color:var(--graphite);font-size:14px;line-height:1.9}
.policy .go{margin-top:auto;padding-top:16px}

/* ---- 资质横条 ---- */
.cert-strip{background:var(--navy-900);color:#fff}
.cert-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);padding:40px 0}
.cert-strip .item{padding:0 28px;border-right:1px solid rgba(255,255,255,.12)}
.cert-strip .item:last-child{border-right:0}
.cert-strip b{display:block;font-family:var(--serif);font-size:18px;color:#fff;line-height:1.5}
.cert-strip span{font-size:12.5px;color:#8FA3BF}

/* ---- 四步流程 ---- */
.steps.four{grid-template-columns:repeat(4,1fr)}

/* ---- 页脚补充 ---- */
.foot-links{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:18px 0;border-top:1px solid rgba(255,255,255,.08);font-size:12.5px;color:#7E92AC}
.friends a,.legal-links a{color:#7E92AC;margin-right:16px}
.friends a:last-child,.legal-links a:last-child{margin-right:0}
.friends a:hover,.legal-links a:hover{color:var(--gold-soft)}

@media(max-width:1080px){
  .nav-item .dropdown{display:none}
  .policy-list{grid-template-columns:1fr}
  .cert-strip .wrap{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .cert-strip .item:nth-child(2){border-right:0}
  .cert-strip .item{padding:0 20px}
  .steps.four{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .float-tools{right:12px;bottom:16px}
  .float-tools a{display:none}
  .cert-strip .wrap{grid-template-columns:1fr;gap:18px}
  .cert-strip .item{border-right:0;padding:0}
  .steps.four{grid-template-columns:1fr}
}

/* ---- 客户 LOGO 墙 ---- */
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:34px 0 18px}
.logo-wall > div{background:#fff;height:112px;display:flex;align-items:center;justify-content:center;padding:18px 24px}
.logo-wall img{max-width:100%;max-height:58px;width:auto;height:auto;filter:grayscale(100%);opacity:.7;transition:.25s}
.logo-wall > div:hover img{filter:none;opacity:1}

/* ---- 服务现场照片 ---- */
.photo-band{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.photo-card{position:relative;overflow:hidden;background:#0B1F38;margin:0}
.photo-card img{width:100%;height:280px;object-fit:cover;transition:transform .6s ease;display:block}
.photo-card:hover img{transform:scale(1.045)}
.photo-card .cap{position:absolute;left:0;right:0;bottom:0;padding:40px 20px 18px;background:linear-gradient(transparent,rgba(8,24,44,.88));color:#fff}
.photo-card .cap b{font-family:var(--serif);font-size:19px;display:block;letter-spacing:.04em}
.photo-card .cap span{font-size:12.5px;color:#C3CFDF}

@media(max-width:1080px){
  .logo-wall{grid-template-columns:repeat(4,1fr)}
  .logo-wall > div{height:100px;padding:14px 18px}
  .photo-band{grid-template-columns:1fr;gap:16px}
  .photo-card img{height:240px}
}
@media(max-width:600px){
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .logo-wall > div{height:88px;padding:10px 12px}
  .logo-wall img{max-height:44px}
  .photo-card img{height:210px}
}

.logo-wall > div.more{flex-direction:column;color:var(--graphite);font-size:12.5px;line-height:1.9;text-align:center;letter-spacing:.02em}

/* ---- 关于我们：实景图片 ---- */
.about-photo{margin:0;position:relative;overflow:hidden;background:#0B1F38}
.about-photo img{width:100%;height:470px;object-fit:cover;display:block;transition:transform .6s ease}
.about-photo:hover img{transform:scale(1.035)}
@media(max-width:1080px){.about-photo img{height:300px}}

/* ---- 客户墙：无“更多”卡，末行留白改为白底细线 ---- */
.logo-wall{background:#fff;border:1px solid var(--line);border-right:0;border-bottom:0}
.logo-wall > div{background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---- 客户墙：7 列 × 4 行（28 家），各断点整除 ---- */
.logo-wall{grid-template-columns:repeat(7,1fr)}
@media(max-width:1080px){.logo-wall{grid-template-columns:repeat(4,1fr)}}
@media(max-width:600px){.logo-wall{grid-template-columns:repeat(2,1fr)}}