/* 众仁环保门户网站 · 设计系统
   主色取自企业标识：蓝 #1689c9 / 青 #3cc3b0 / 深墨 #0b2b3a */
:root{
  --brand:#1689c9; --brand-dark:#0d6ea8; --teal:#3cc3b0; --ink:#0b2b3a;
  --ink-2:#173f52; --muted:#5c7787; --line:#e2edf2; --bg:#f4f9fb;
  --white:#fff; --shadow:0 10px 34px rgba(11,43,58,.09);
  --shadow-sm:0 4px 16px rgba(11,43,58,.07);
  --radius:14px; --maxw:1200px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit}
.container{width:min(var(--maxw),calc(100% - 48px));margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ---------- Header ---------- */
.topbar{background:#083044;color:#cfe6ef;font-size:12.5px;letter-spacing:.2px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px;gap:16px}
.topbar a:hover{color:#fff}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;height:78px;gap:28px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{height:52px;width:auto}
.brand .brand-txt{display:flex;flex-direction:column;line-height:1.25}
.brand .brand-txt b{font-size:17px;letter-spacing:.5px}
.brand .brand-txt span{font-size:10.5px;color:var(--muted);letter-spacing:1.2px;text-transform:uppercase}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.main-nav a{padding:10px 13px;font-size:14.5px;font-weight:500;border-radius:8px;white-space:nowrap;transition:.18s}
.main-nav a:hover{color:var(--brand);background:#eef7fb}
.main-nav a.active{color:var(--brand);background:#e8f4fa;font-weight:700}
.hd-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.lang-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--ink-2);padding:7px 13px;border-radius:999px;font-size:13px;font-weight:600;cursor:pointer;transition:.18s}
.lang-btn:hover{border-color:var(--brand);color:var(--brand)}
.admin-link{font-size:12.5px;color:var(--muted);border-left:1px solid var(--line);padding-left:12px}
.admin-link:hover{color:var(--brand)}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;font-size:14.5px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(22,137,201,.24)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.65);color:#fff;background:rgba(255,255,255,.08)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}
.btn-outline{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-outline:hover{background:var(--brand);color:#fff}
.btn-sm{padding:8px 16px;font-size:13px}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:570px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.03)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,38,58,.88) 0%,rgba(6,55,78,.72) 46%,rgba(6,55,78,.22) 100%)}
.hero .container{position:relative;z-index:2;padding:88px 0}
.hero-inner{max-width:660px}
.badge{display:inline-block;padding:6px 15px;border:1px solid rgba(255,255,255,.5);border-radius:999px;font-size:12.5px;letter-spacing:1px;margin-bottom:22px;background:rgba(255,255,255,.1)}
.hero h1{font-size:clamp(32px,4.2vw,52px);line-height:1.32;font-weight:700;letter-spacing:.5px;margin-bottom:18px}
.hero p.sub{font-size:16.5px;line-height:1.9;color:#e2f1f7;margin-bottom:34px;max-width:580px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-wave{position:absolute;bottom:-1px;left:0;width:100%;z-index:3}
.hero-dots{position:absolute;bottom:38px;right:6%;z-index:4;display:flex;gap:8px}
.hero-dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.45);display:block}
.hero-dots i:first-child{width:26px;border-radius:8px;background:#fff}

/* ---------- Section ---------- */
.section{padding:88px 0}
.section.soft{background:var(--bg)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 52px}
.sec-kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2.4px;color:var(--brand);text-transform:uppercase;margin-bottom:12px}
.sec-head h2{font-size:clamp(26px,3vw,36px);line-height:1.35;margin-bottom:14px}
.sec-head h2::after{content:"";display:block;width:52px;height:3px;background:var(--teal);margin:16px auto 0;border-radius:2px}
.sec-head p{color:var(--muted);font-size:15px}
.sec-head.left{text-align:left;margin-left:0}
.sec-head.left h2::after{margin-left:0}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-top:-52px;position:relative;z-index:10}
.stat{padding:32px 26px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border:0}
.stat b{display:block;font-size:34px;line-height:1.2;color:var(--brand);font-weight:700;letter-spacing:-.5px}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:8px}

/* cards */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#c7e3ef}
.card-media{height:200px;overflow:hidden;background:#dbeef5;position:relative}
.card-media img{width:100%;height:100%;object-fit:cover;transition:.45s}
.card:hover .card-media img{transform:scale(1.06)}
.card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:18px;line-height:1.5;margin-bottom:10px}
.card-body p{font-size:14px;color:var(--muted);flex:1}
.card-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.tag{font-size:11.5px;padding:4px 10px;border-radius:999px;background:#eaf6fa;color:var(--brand-dark);border:1px solid #d6ecf5}
.card-link{margin-top:18px;font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;gap:6px;align-items:center}
.icon-box{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#e8f7fb,#d9f2ee);display:grid;place-items:center;margin-bottom:16px}
.icon-box svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* tech list */
.tech-item{display:grid;grid-template-columns:80px 1fr 300px;gap:32px;padding:34px 0;border-bottom:1px solid var(--line);align-items:start}
.tech-item:last-child{border-bottom:0}
.tech-no{font-size:38px;font-weight:800;color:#cfe7f1;line-height:1}
.tech-main h3{font-size:21px;margin-bottom:8px}
.tech-badge{display:inline-block;font-size:11.5px;padding:3px 11px;border-radius:999px;background:#e6f6f3;color:#128c7c;border:1px solid #c8eae3;margin-bottom:14px}
.tech-main p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.tech-sub{font-size:13px;font-weight:700;color:var(--ink-2);margin:14px 0 6px}
.tech-main ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.tech-main li{font-size:12.5px;background:#f2f8fb;border:1px solid var(--line);padding:5px 11px;border-radius:6px;color:var(--ink-2)}
.tech-figure{height:200px;border-radius:12px;overflow:hidden;background:#eaf4f8}
.tech-figure img{width:100%;height:100%;object-fit:cover}

/* case cards */
.filters{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-bottom:34px}
.filter{padding:8px 18px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:13.5px;cursor:pointer;color:var(--ink-2);transition:.18s}
.filter:hover{border-color:var(--brand);color:var(--brand)}
.filter.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.case-card{position:relative}
.case-status{position:absolute;top:12px;left:12px;z-index:2;font-size:11px;padding:4px 10px;border-radius:6px;background:rgba(8,48,68,.82);color:#fff;backdrop-filter:blur(4px)}
.case-scale{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);background:#eaf6fb;padding:3px 10px;border-radius:5px;margin-bottom:10px}
.case-sector{font-size:12px;color:var(--muted)}
.note-box{background:#fff8e9;border:1px solid #f2dfb4;color:#785b23;padding:16px 20px;border-radius:10px;font-size:13px;line-height:1.8;margin-bottom:30px}

/* news */
.news-list{display:grid;gap:18px}
.news-row{display:grid;grid-template-columns:120px 1fr auto;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;transition:.2s}
.news-row:hover{border-color:#bcdcea;box-shadow:var(--shadow-sm)}
.news-date{font-size:13px;color:var(--muted);border-right:1px solid var(--line)}
.news-row h3{font-size:17px;margin-bottom:5px}
.news-row p{font-size:13.5px;color:var(--muted)}
.empty-state{text-align:center;padding:70px 24px;background:var(--bg);border:1px dashed #c9dfe9;border-radius:var(--radius)}
.empty-state svg{width:52px;height:52px;stroke:#9dc3d3;fill:none;stroke-width:1.4;margin-bottom:16px}
.empty-state h3{font-size:18px;margin-bottom:8px}
.empty-state p{color:var(--muted);font-size:14px;max-width:560px;margin:0 auto 20px}

/* honors */
.honor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.honor{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center;transition:.2s}
.honor:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.honor img{height:190px;width:100%;object-fit:contain;background:#fafcfe;border-radius:6px}
.honor span{display:block;font-size:12.5px;color:var(--muted);margin-top:10px}

/* about */
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-split img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:400px;object-fit:cover}
.para{margin-bottom:16px;font-size:15px;color:var(--ink-2);line-height:1.95}
.qual-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:24px}
.qual{display:flex;gap:10px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px;font-size:13.5px;line-height:1.6}
.qual i{flex-shrink:0;width:18px;height:18px;border-radius:50%;background:var(--teal);color:#fff;font-style:normal;font-size:11px;display:grid;place-items:center;margin-top:2px}
.culture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.culture{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;border-top:3px solid var(--teal)}
.culture b{display:block;font-size:12px;color:var(--brand);letter-spacing:1px;margin-bottom:10px}
.culture p{font-size:15px;line-height:1.7}

/* CTA band */
.cta-band{background:linear-gradient(110deg,#0a4a68,#0d7d92);color:#fff;padding:62px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-80px;top:-120px;width:420px;height:420px;border:60px solid rgba(255,255,255,.05);border-radius:50%}
.cta-band .container{display:flex;justify-content:space-between;align-items:center;gap:30px;position:relative;z-index:2;flex-wrap:wrap}
.cta-band h2{font-size:28px;margin-bottom:8px}
.cta-band p{color:#cfeaf2;font-size:15px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.info-card{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.info-ico{width:42px;height:42px;border-radius:10px;background:#eaf6fb;display:grid;place-items:center;flex-shrink:0}
.info-ico svg{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8}
.info-card b{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.info-card p{font-size:15.5px;line-height:1.7}
.form-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}
.field input,.field textarea,.field select{width:100%;padding:11px 14px;border:1px solid #d5e5ec;border-radius:8px;background:#fff;outline:none;transition:.18s}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(22,137,201,.1)}
.field textarea{min-height:110px;resize:vertical}
.form-note{font-size:12px;color:var(--muted);margin-top:12px}
.form-ok{background:#e9f8f1;border:1px solid #bfe8d3;color:#176b47;padding:12px 16px;border-radius:8px;font-size:13.5px;margin-top:14px;display:none}

/* page banner */
.page-banner{background:linear-gradient(110deg,#0a3c56,#117a95);color:#fff;padding:64px 0 70px;position:relative;overflow:hidden}
.page-banner::after{content:"";position:absolute;right:-60px;bottom:-160px;width:400px;height:400px;border:70px solid rgba(255,255,255,.045);border-radius:50%}
.page-banner h1{font-size:34px;margin-bottom:10px}
.page-banner p{color:#c9e8f1;font-size:15px;max-width:720px}
.crumb{font-size:12.5px;color:#a9d4e3;margin-bottom:14px}
.crumb a:hover{color:#fff}

/* detail */
.detail-layout{display:grid;grid-template-columns:1fr 320px;gap:46px}
.detail-hero{width:100%;height:390px;object-fit:cover;border-radius:var(--radius);margin-bottom:32px}
.detail-title{font-size:29px;margin-bottom:16px;line-height:1.4}
.detail-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:26px 0}
.meta-item{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px}
.meta-item b{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.meta-item span{font-size:15.5px;font-weight:600}
.side-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:24px;height:fit-content}
.side-box h3{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-box a{display:block;padding:10px 0;font-size:14px;border-bottom:1px dashed var(--line);color:var(--ink-2)}
.side-box a:hover{color:var(--brand)}

/* footer */
.site-footer{background:#072b3d;color:#b9d3df;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:50px;padding-bottom:44px}
.footer-brand img{height:56px;margin-bottom:16px;background:#fff;border-radius:8px;padding:4px}
.footer-brand p{font-size:13.5px;line-height:1.9;max-width:330px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;position:relative;padding-bottom:10px}
.site-footer h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--teal)}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.footer-links a{font-size:13.5px}
.footer-links a:hover{color:#fff}
.footer-contact p{font-size:13.5px;margin-bottom:10px;display:flex;gap:10px;align-items:flex-start}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:12.5px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom a:hover{color:#fff}

/* admin */
.admin-wrap{max-width:1080px;margin:0 auto;padding:40px 24px 80px}
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:26px}
.admin-head h1{font-size:26px}
.admin-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:24px;border-bottom:1px solid var(--line);padding-bottom:12px}
.admin-tab{padding:9px 16px;border:0;background:#f0f6f9;border-radius:8px;cursor:pointer;font-size:13.5px;color:var(--ink-2)}
.admin-tab.on{background:var(--brand);color:#fff;font-weight:600}
.admin-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px}
.admin-row{border:1px solid var(--line);border-radius:10px;padding:18px;margin-bottom:14px;background:#fcfefe}
.admin-row-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:12px}
.admin-row-head b{font-size:14.5px}
.admin-fields{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.admin-fields .full{grid-column:1/-1}
.admin-fields label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}
.admin-fields input,.admin-fields textarea,.admin-fields select{width:100%;padding:9px 11px;border:1px solid #d8e7ed;border-radius:7px;font-size:13px;background:#fff}
.admin-fields textarea{min-height:70px;resize:vertical}
.mini-btn{border:1px solid var(--line);background:#fff;padding:6px 12px;border-radius:7px;font-size:12.5px;cursor:pointer;color:var(--ink-2)}
.mini-btn:hover{border-color:var(--brand);color:var(--brand)}
.mini-btn.danger:hover{border-color:#d9534f;color:#d9534f}
.admin-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
.login-box{max-width:400px;margin:90px auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:34px;box-shadow:var(--shadow)}
.login-box h1{font-size:21px;margin-bottom:8px}
.login-box p{font-size:13px;color:var(--muted);margin-bottom:22px}
.status-line{font-size:13px;margin-top:14px;padding:10px 14px;border-radius:8px;display:none}
.status-line.ok{display:block;background:#e9f8f1;color:#176b47}
.status-line.err{display:block;background:#fdeeee;color:#a13939}

/* utility */
.text-center{text-align:center}
.mt-40{margin-top:40px}
.hidden{display:none!important}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;margin-bottom:20px}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .main-nav a{padding:9px 9px;font-size:13.5px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .honor-grid{grid-template-columns:repeat(3,1fr)}
  .tech-item{grid-template-columns:60px 1fr;gap:20px}
  .tech-figure{grid-column:2;height:180px}
  .detail-layout{grid-template-columns:1fr}
}
@media(max-width:820px){
  .topbar .tb-right span:first-child{display:none}
  .menu-toggle{display:block;order:3;margin-left:auto}
  .main-nav{position:absolute;top:78px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 24px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 8px;font-size:15px}
  .hd-actions{order:2}
  .admin-link{display:none}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-36px}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .about-split,.contact-grid{grid-template-columns:1fr;gap:30px}
  .about-split img{height:280px}
  .culture-grid,.qual-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .admin-fields{grid-template-columns:1fr}
}
@media(max-width:600px){
  .container{width:calc(100% - 32px)}
  .topbar{display:none}
  .site-header .container{height:66px;gap:12px}
  .brand img{height:42px}
  .brand .brand-txt b{font-size:14px}
  .brand .brand-txt span{display:none}
  .main-nav{top:66px}
  .hero{min-height:480px}
  .hero .container{padding:64px 0}
  .section{padding:60px 0}
  .grid-2,.grid-3,.grid-4,.honor-grid,.culture-grid,.qual-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .detail-meta{grid-template-columns:1fr}
  .detail-hero{height:230px}
  .news-row{grid-template-columns:1fr;gap:8px}
  .news-date{border:0}
  .tech-item{grid-template-columns:1fr;gap:12px}
  .tech-figure{grid-column:1}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .page-banner{padding:48px 0}
}

/* ---- 案例筛选 / 后台覆盖补充 ---- */
.case-slot{display:block;min-width:0}
.case-slot.hidden,.hidden{display:none !important}
.case-slot .card{height:100%}
.source-table{width:100%;border-collapse:collapse;font-size:14px}
.source-table th,.source-table td{border:1px solid var(--line,#e3e9f0);padding:9px 12px;text-align:left;vertical-align:top}
.source-table th{background:#f2f7fb;white-space:nowrap}