/* getpingti.com 企业官网改版服务 · 共用样式
   深墨蓝 × 活力橙 (#ff5a1f)，移动优先，纯 CSS 无框架 */
:root{
  --ink:#0c2740;
  --ink-2:#12395c;
  --ink-3:#1d4e79;
  --accent:#ff5a1f;
  --accent-dark:#e04a12;
  --bg:#f5f7fa;
  --card:#ffffff;
  --text:#22303c;
  --muted:#5c6d7a;
  --line:#dde5ec;
  --radius:14px;
  --shadow:0 2px 10px rgba(12,39,64,.07);
  --shadow-up:0 14px 30px rgba(12,39,64,.16);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--ink-3);text-decoration:none}
a:hover{color:var(--accent)}
h1,h2,h3{color:var(--ink);line-height:1.35;margin:0 0 .5em}
p{margin:0 0 1em}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- 顶部条与页眉 ---------- */
.topbar{background:var(--ink);color:#cfe0ef;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:6px;padding-bottom:6px;flex-wrap:wrap}
.topbar a{color:#ffd9c7}
.topbar a:hover{color:#fff}
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;gap:18px;padding-top:12px;padding-bottom:12px}
.brand{display:flex;flex-direction:column;line-height:1.25;margin-right:auto}
.brand .logo{font-size:24px;font-weight:800;color:var(--ink);letter-spacing:.2px}
.brand .logo i{font-style:normal;color:var(--accent)}
.brand .tag{font-size:12.5px;color:var(--muted)}
.main-nav{display:none}
.nav-toggle{
  border:1px solid var(--line);background:#fff;border-radius:9px;
  padding:7px 14px;font-size:15px;color:var(--ink);cursor:pointer;
}
.main-nav.open{display:block;position:absolute;left:0;right:0;top:100%;
  background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-up)}
.main-nav.open a{display:block;padding:13px 20px;color:var(--ink);border-top:1px solid var(--line)}
.main-nav.open a:first-child{border-top:none}
.main-nav a.active{color:var(--accent);font-weight:700}
.site-header a.header-cta{display:none}
@media(min-width:900px){
  .nav-toggle{display:none}
  .main-nav{display:flex;gap:4px;position:static}
  .main-nav a{padding:8px 13px;border-radius:9px;color:var(--ink);font-size:15.5px;white-space:nowrap}
  .main-nav a:hover{background:#eef3f8;color:var(--accent)}
  .site-header a.header-cta{display:inline-block}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block;background:var(--accent);color:#fff;font-weight:700;
  padding:13px 26px;border-radius:11px;font-size:16.5px;border:1px solid var(--accent);
  transition:transform .25s ease,background .25s ease,box-shadow .25s ease;
}
.btn:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,90,31,.32)}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.75)}
.btn.ghost:hover{background:rgba(255,255,255,.12);color:#fff;box-shadow:none}
.btn.dark-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.dark-ghost:hover{color:var(--accent);border-color:var(--accent);box-shadow:var(--shadow)}
.btn.small{padding:9px 18px;font-size:15px}

/* ---------- Hero（真实图片背景，非大色块） ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;background:var(--ink);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url("assets/img_hero.jpg") center 38%/cover no-repeat;
  /* 图片来源：案例企业科惠除尘原站实拍（除尘工程现场），经案例站授权流程采集，见案例页说明 */
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,26,43,.92) 30%,rgba(7,26,43,.68) 62%,rgba(7,26,43,.38) 100%);
}
.hero .wrap{position:relative;z-index:2;padding-top:64px;padding-bottom:64px}
.hero .kicker{
  display:inline-block;background:rgba(255,90,31,.92);color:#fff;font-weight:700;
  font-size:14px;padding:4px 14px;border-radius:999px;margin-bottom:18px;letter-spacing:1px;
}
.hero h1{color:#fff;font-size:34px;margin-bottom:14px}
.hero h1 .hl{color:#ffb59a}
.hero .sub{font-size:17.5px;color:#e7eef5;max-width:640px}
.hero .price-line{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin:22px 0 6px}
.hero .price{font-size:44px;font-weight:800;color:#fff;line-height:1}
.hero .price small{font-size:19px;font-weight:600}
.hero .price-note{color:#ffd9c7;font-size:15.5px}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero .assure{margin-top:20px;font-size:14.5px;color:#bcd2e4}
@media(min-width:900px){
  .hero .wrap{padding-top:92px;padding-bottom:92px}
  .hero h1{font-size:46px}
}

/* ---------- 内页横幅 ---------- */
.page-head{position:relative;color:#fff;overflow:hidden;background:var(--ink)}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:url("assets/img_hero.jpg") center 22%/cover no-repeat;
}
.page-head::after{content:"";position:absolute;inset:0;background:linear-gradient(95deg,rgba(7,26,43,.93) 40%,rgba(7,26,43,.6))}
.page-head .wrap{position:relative;z-index:2;padding-top:44px;padding-bottom:44px}
.page-head h1{color:#fff;font-size:30px;margin-bottom:8px}
.page-head p{color:#d7e4f0;margin:0;max-width:680px}
@media(min-width:900px){.page-head h1{font-size:36px}}

/* ---------- 区块与卡片 ---------- */
section.block{padding:52px 0 8px}
.sec-head{margin-bottom:26px}
.sec-head h2{font-size:27px}
.sec-head p{color:var(--muted);max-width:720px;margin:0}
@media(min-width:900px){.sec-head h2{font-size:31px}}
.grid{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:640px){.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.grid.c3{grid-template-columns:1fr 1fr 1fr}.grid.c4{grid-template-columns:1fr 1fr 1fr 1fr}}
@media(min-width:640px) and (max-width:1023px){.grid.c4{grid-template-columns:1fr 1fr}}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
  transition:transform .35s ease,box-shadow .35s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-up)}
.card h3{font-size:18.5px}
.card p{color:var(--muted);font-size:15.5px;margin-bottom:0}
.card .big-num{font-size:30px;font-weight:800;color:var(--accent);line-height:1.15}
.card .stat-label{font-weight:700;color:var(--ink);margin:4px 0 6px;font-size:16.5px}

/* 图片悬停缓慢放大（既定设计标准） */
.zoom{overflow:hidden;border-radius:10px}
.zoom img{transition:transform .8s ease}
a:hover .zoom img,.card:hover .zoom img,.zoom:hover img{transform:scale(1.07)}

/* 案例卡 */
.case-card{padding:0;overflow:hidden}
.case-card .body{padding:20px 22px 22px}
.case-card .zoom{border-radius:0}
.case-card .zoom img{width:100%;height:210px;object-fit:cover}
.case-card .meta{font-size:13.5px;color:var(--accent);font-weight:700;letter-spacing:.5px}
.case-card ul{margin:10px 0 14px;padding-left:20px;color:var(--muted);font-size:15.5px}
.case-card .links{display:flex;gap:10px;flex-wrap:wrap}

/* 流程 */
.steps{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:768px){.steps{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.step .n{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:50%;background:var(--ink);color:#fff;font-weight:800;font-size:18px;margin-bottom:12px;
}
.step h3{font-size:17.5px}
.step p{color:var(--muted);font-size:15px;margin:0}

/* 清单 */
ul.tick,ul.cross{list-style:none;margin:0;padding:0}
ul.tick li,ul.cross li{padding:9px 0 9px 30px;position:relative;border-bottom:1px dashed var(--line);font-size:16px}
ul.tick li:last-child,ul.cross li:last-child{border-bottom:none}
ul.tick li::before{content:"✓";position:absolute;left:2px;color:var(--accent);font-weight:800}
ul.cross li::before{content:"✕";position:absolute;left:2px;color:#9db2c1;font-weight:800}
ul.tick li span,ul.cross li span{color:var(--muted);font-size:14.5px}

/* 价格条 */
.price-band{
  background:var(--ink);color:#fff;border-radius:var(--radius);padding:28px;
  display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
}
.price-band .amount{font-size:40px;font-weight:800;line-height:1.1}
.price-band .amount small{font-size:17px;font-weight:600;color:#bcd2e4}
.price-band p{color:#d7e4f0;margin:0;max-width:560px}

/* FAQ */
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:14px;box-shadow:var(--shadow)}
.faq-item h3{font-size:17.5px;margin-bottom:6px}
.faq-item p{color:var(--muted);margin:0;font-size:15.5px}

/* 对照表式案例 */
.case-detail{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;margin-bottom:26px}
.case-detail .cols{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:900px){.case-detail .cols{grid-template-columns:1fr 1fr}}
.case-detail h3{font-size:17px;border-left:4px solid var(--accent);padding-left:10px}
.case-detail ul{margin:0;padding-left:20px;color:var(--muted);font-size:15.5px}
.case-detail .shot{margin-bottom:18px}
.case-detail .shot img{width:100%;height:260px;object-fit:cover}

/* 联系表单 */
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.form-card label{display:block;font-weight:700;color:var(--ink);margin:16px 0 6px;font-size:15.5px}
.form-card label:first-child{margin-top:0}
.form-card input,.form-card textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px;
  font-size:16px;font-family:inherit;background:#fbfcfe;color:var(--text);
}
.form-card input:focus,.form-card textarea:focus{outline:2px solid var(--accent);border-color:transparent}
.form-note{font-size:14px;color:var(--muted);margin-top:12px}

/* CTA 区 */
.cta-band{
  background:linear-gradient(100deg,var(--ink) 55%,var(--ink-3));color:#fff;
  border-radius:var(--radius);padding:32px 28px;margin:52px 0;
}
.cta-band h2{color:#fff;font-size:25px}
.cta-band p{color:#d7e4f0;max-width:640px}
.cta-band .mail{font-size:19px;font-weight:700;color:#ffb59a}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#b9cede;margin-top:64px}
.site-footer .wrap{padding-top:36px;padding-bottom:30px}
.site-footer .cols{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:768px){.site-footer .cols{grid-template-columns:2fr 1fr 1fr}}
.site-footer h4{color:#fff;margin:0 0 10px;font-size:16px}
.site-footer a{color:#b9cede;display:block;padding:3px 0;font-size:15px}
.site-footer a:hover{color:#fff}
.site-footer p{font-size:14.5px;margin:0}
.site-footer .fine{border-top:1px solid rgba(255,255,255,.14);margin-top:24px;padding-top:16px;font-size:13px;color:#8fa9bf}

@media (prefers-reduced-motion: reduce){
  .zoom img,.card,.btn{transition:none}
  a:hover .zoom img,.card:hover .zoom img,.zoom:hover img{transform:none}
  .card:hover,.btn:hover{transform:none}
  html{scroll-behavior:auto}
}