/* ============================================================
   富东康发电机组环保工程 · 全站样式
   域名：huanbaosz.com
   ============================================================ */
:root{
  --brand:#0E7C4A;          /* 环保绿 */
  --brand-d:#095C37;
  --brand-l:#E8F5EE;
  --accent:#165DFF;         /* 工程蓝 */
  --accent-l:#EAF1FF;
  --ink:#10202E;
  --ink-2:#3B4B5C;
  --ink-3:#6B7A8C;
  --line:#E3E9F0;
  --bg:#F6F8FB;
  --warn:#F5A524;
  --radius:14px;
  --shadow:0 6px 24px rgba(16,32,46,.08);
  --shadow-l:0 2px 10px rgba(16,32,46,.06);
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:#fff;color:var(--ink);
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans CN",Arial,sans-serif;
  font-size:16px;line-height:1.75;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-d)}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.35;font-weight:700;letter-spacing:.2px}
h1{font-size:32px}h2{font-size:26px}h3{font-size:19px}h4{font-size:16px}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.35em 0}
table{width:100%;border-collapse:collapse;font-size:15px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.sec{padding:72px 0}
.sec-alt{background:var(--bg)}
.sec-head{max-width:820px;margin:0 auto 38px;text-align:center}
.sec-head h2{margin-bottom:8px}
.sec-head p{color:var(--ink-3);margin:0}
.kicker{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);
  background:var(--brand-l);padding:4px 12px;border-radius:999px;margin-bottom:12px}
.lead{font-size:17px;color:var(--ink-2)}
.muted{color:var(--ink-3)}
.small{font-size:13px}
.center{text-align:center}

/* ---------- 顶栏 ---------- */
.topbar{background:var(--ink);color:#C8D4E1;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:38px;gap:16px;flex-wrap:wrap}
.topbar a{color:#fff}
.topbar span{margin-right:16px}
/* ---------- 主导航 ---------- */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:18px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink)}
.brand img{width:38px}
.brand em{display:block;font-style:normal;font-size:11px;color:var(--ink-3);font-weight:500;letter-spacing:.5px}
.menu{display:flex;gap:4px;margin-left:auto;list-style:none;padding:0;flex-wrap:wrap}
.menu li{margin:0}
.menu a{display:block;padding:8px 10px;border-radius:8px;color:var(--ink-2);font-size:14px;font-weight:600;white-space:nowrap}
.menu a:hover{background:var(--brand-l);color:var(--brand-d)}
.menu a.on{color:var(--brand);background:var(--brand-l)}
.nav-tel{margin-left:8px;white-space:nowrap}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  border-radius:8px;padding:7px 11px;font-size:16px;cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:11px 22px;border-radius:999px;font-weight:700;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.18s}
.btn-p{background:var(--brand);color:#fff}
.btn-p:hover{background:var(--brand-d);color:#fff;transform:translateY(-1px)}
.btn-o{border-color:var(--brand);color:var(--brand)}
.btn-o:hover{background:var(--brand);color:#fff}
.btn-w{background:#fff;color:var(--brand)}
.btn-w:hover{background:#F0FFF6;color:var(--brand-d)}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-sm{padding:8px 16px;font-size:14px}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(120deg,#06301C 0%,#0E7C4A 52%,#14886F 100%);color:#fff;padding:64px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{color:#fff;font-size:38px;line-height:1.28}
.hero p{color:#D6EADF;font-size:17px;max-width:560px}
.hero .kicker{background:rgba(255,255,255,.16);color:#CFF3DF}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-figs{display:flex;gap:28px;margin:26px 0 0;flex-wrap:wrap}
.hero-fig b{display:block;font-size:26px;color:#fff;line-height:1.2}
.hero-fig span{font-size:13px;color:#B9DCCB}
.hero-art{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);
  border-radius:var(--radius);padding:16px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.hero-tags i{font-style:normal;font-size:13px;background:rgba(255,255,255,.13);
  padding:5px 12px;border-radius:999px;color:#DDF2E6}

/* 次级页 banner */
.pagehead{background:linear-gradient(115deg,#06301C,#0E7C4A);color:#fff;padding:44px 0 40px}
.pagehead h1{color:#fff;font-size:32px;margin-bottom:6px}
.pagehead p{color:#CFE9DA;margin:0;max-width:760px}
.crumb{font-size:13px;color:#A9D2BC;margin-bottom:14px}
.crumb a{color:#DCEFE4}
.crumb span{margin:0 6px;color:#7FB899}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-l);transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#CBEBDA}
.card .thumb{border-radius:10px;overflow:hidden;margin:-24px 24px 18px;background:var(--brand-l)}
.card h3{margin-bottom:6px}
.card p{color:var(--ink-2);font-size:15px}
.card .more{font-weight:700;font-size:14px}
.ico{width:46px;height:46px;border-radius:12px;background:var(--brand-l);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:22px}
.tag-list{list-style:none;padding:0;margin:14px 0 0}
.tag-list li{display:flex;gap:8px;align-items:flex-start;font-size:14px;color:var(--ink-2);margin:.5em 0}
.tag-list li::before{content:"✓";color:var(--brand);font-weight:800;flex:0 0 auto}
.benefit{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:10px;padding:16px 18px;margin-bottom:12px}
.benefit h4{margin-bottom:4px}
.benefit p{margin:0;font-size:14px;color:var(--ink-3)}

/* ---------- 服务详情通用 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split-r{direction:rtl}.split-r>*{direction:ltr}
.figure{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.figure figcaption{font-size:13px;color:var(--ink-3);margin-top:10px;text-align:center}
.spec{margin:18px 0;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.spec th{background:var(--brand-l);color:var(--brand-d);text-align:left;font-weight:700;padding:10px 14px}
.spec td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}
.spec td:first-child{color:var(--ink-3);white-space:nowrap;width:34%}
.note{background:var(--accent-l);border-left:4px solid var(--accent);padding:14px 18px;
  border-radius:8px;font-size:14px;color:#1B3A66}
.warn{background:#FFF7E8;border-left:4px solid var(--warn);padding:14px 18px;
  border-radius:8px;font-size:14px;color:#6B4A0B}

/* 分贝对比条 */
.db{margin:14px 0}
.db-row{margin-bottom:16px}
.db-row b{display:flex;justify-content:space-between;font-size:14px;margin-bottom:6px}
.bar{height:14px;border-radius:999px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#E4572E,#F5A524)}
.bar.ok i{background:linear-gradient(90deg,#0E7C4A,#36B37E)}

/* ---------- 流程 ---------- */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:16px;grid-template-columns:repeat(4,1fr)}
.steps li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;position:relative}
.steps li b{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--brand);
  color:#fff;align-items:center;justify-content:center;font-size:14px;margin-bottom:10px}
.steps li p{font-size:14px;color:var(--ink-3);margin:0}
.steps li h4{margin-bottom:4px;font-size:16px}

/* ---------- 案例 ---------- */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.case .thumb{background:var(--brand-l);padding:14px}
.case .body{padding:20px 22px;display:flex;flex-direction:column;flex:1}
.case h3{font-size:18px}
.chip{display:inline-block;font-size:12px;background:var(--accent-l);color:#1B3A66;
  padding:3px 10px;border-radius:999px;margin:0 6px 6px 0;font-weight:600}
.quote{font-style:italic;color:var(--ink-2);font-size:15px;margin:10px 0 0;
  border-left:3px solid var(--brand-l);padding-left:12px}
.kpi{display:flex;gap:18px;margin:14px 0 0;flex-wrap:wrap}
.kpi div{flex:1;min-width:120px;background:var(--brand-l);border-radius:10px;padding:10px 12px}
.kpi b{display:block;font-size:20px;color:var(--brand-d)}
.kpi span{font-size:12px;color:var(--ink-3)}

/* ---------- 数据条 ---------- */
.stats{background:linear-gradient(115deg,#06301C,#0E7C4A);color:#fff;padding:40px 0}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats b{display:block;font-size:34px;line-height:1.2}
.stats span{font-size:14px;color:#B9DCCB}

/* ---------- 折叠问答 ---------- */
.faq{border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:700;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:14px;font-size:22px;color:var(--brand);font-weight:600}
.faq[open] summary::after{content:"−"}
.faq .a{padding:0 20px 18px;color:var(--ink-2);font-size:15px;border-top:1px dashed var(--line);padding-top:14px}
.faq .a p:last-child{margin-bottom:0}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
.info-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--line)}
.info-item .ico{margin:0;flex:0 0 auto;width:42px;height:42px;font-size:20px}
.info-item h4{margin:0 0 2px}
.info-item p{margin:0;font-size:15px;color:var(--ink-2)}
form.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-l)}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1px solid var(--line);
  border-radius:9px;font:inherit;font-size:15px;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(14,124,74,.12)}
.field textarea{min-height:104px;resize:vertical}
.form-note{font-size:13px;color:var(--ink-3);margin:10px 0 0}
.map{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--bg)}

/* ---------- 内链区 / CTA ---------- */
.inlink{background:#fff;border:1px dashed var(--line);border-radius:12px;padding:20px 24px}
.inlink ul{margin:0;padding-left:1.1em;columns:2;column-gap:32px}
.inlink li{font-size:14px}
.cta-band{background:linear-gradient(115deg,#0E7C4A,#14886F);color:#fff;border-radius:var(--radius);
  padding:32px;display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h3{color:#fff;margin-bottom:4px;font-size:22px}
.cta-band p{color:#CFE9DA;margin:0}

/* ---------- 页脚 ---------- */
footer{background:#0B1622;color:#9FB0C2;padding:52px 0 0;font-size:14px;margin-top:0}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:28px;padding-bottom:34px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin:.55em 0}
.foot-grid a{color:#9FB0C2}
.foot-grid a:hover{color:#fff}
.foot-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:12px}
.foot-brand img{width:34px;filter:brightness(0) invert(1)}
.copy{border-top:1px solid #1E2A38;padding:18px 0;font-size:13px;color:#7B8CA0}
.copy .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.copy a{color:#7B8CA0}

/* ---------- 移动端浮动拨号 ---------- */
.tel-float{position:fixed;right:16px;bottom:18px;z-index:60;background:var(--brand);color:#fff;
  border-radius:999px;padding:12px 18px;font-weight:700;box-shadow:0 6px 18px rgba(14,124,74,.4);display:none}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .hero .wrap,.split{grid-template-columns:1fr}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .hero-art{order:-1}
}
@media(max-width:640px){
  .sec{padding:48px 0}
  h1{font-size:26px}.hero h1{font-size:28px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .menu{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;
    padding:12px 20px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .menu.open{display:flex}
  .menu a{padding:12px 10px;border-bottom:1px solid var(--line)}
  .nav-tel{display:none}
  .burger{display:block}
  .tel-float{display:block}
  .inlink ul{columns:1}
  .cta-band{padding:24px}
  .topbar .wrap{font-size:12px}
}