/* ============================================================
   匠心万众 · 官网样式表
   适配：PC / 平板 / 手机
   ============================================================ */

:root{
  --ink:#16202c;
  --ink-2:#46586c;
  --muted:#8496a8;
  --brand:#0e5c8a;
  --brand-dark:#0a4467;
  --brand-soft:#eaf4fa;
  --warm:#d9773a;
  --warm-soft:#fdf3ec;
  --bg:#ffffff;
  --soft:#f5f8fa;
  --line:#e3eaef;
  --radius:14px;
  --shadow:0 1px 3px rgba(22,32,44,.04), 0 8px 22px rgba(22,32,44,.06);
  --shadow-lg:0 14px 38px rgba(22,32,44,.11);
  --max:1160px;
  --font-zh:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-num:"Sora","Noto Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
}

/* 系统主题色（用于案例 / 系统卡片的多彩呈现） */
.sys-heat  {--sys:#d9542b; --sys2:#f0894a; --sys-soft:#fdeee6;}
.sys-air   {--sys:#1382a6; --sys2:#2bb6d6; --sys-soft:#e6f5fa;}
.sys-ground{--sys:#15806f; --sys2:#28b39b; --sys-soft:#e6f5f1;}
.sys-fan   {--sys:#5e4fc4; --sys2:#9479e6; --sys-soft:#efeafc;}
.sys-wind  {--sys:#379149; --sys2:#5ec06f; --sys-soft:#eaf7ec;}
.sys-drop  {--sys:#c5851a; --sys2:#f0b94a; --sys-soft:#fdf4e2;}
.sys-water {--sys:#2a72b6; --sys2:#4fa3e3; --sys-soft:#e8f1fb;}
.sys-temp  {--sys:#4456c4; --sys2:#6f82e6; --sys-soft:#e9ecfb;}
.case,.card{--sys:#0e5c8a; --sys2:#2f96c9; --sys-soft:#eaf4fa;}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-zh);
  font-size:16px; line-height:1.85; color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%; display:block;}
a{color:var(--brand); text-decoration:none;}
a:hover{color:var(--brand-dark);}
h1,h2,h3,h4{margin:0; line-height:1.2; font-weight:800; letter-spacing:-.6px; font-family:var(--font-zh);}
.grad-text{
  background:linear-gradient(100deg,var(--warm) 0%,#f0b14a 60%,var(--brand) 130%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
p{margin:0 0 14px;}
ul{margin:0 0 14px; padding-left:20px;}
li{margin:6px 0;}
.wrap{max-width:var(--max); margin:0 auto; padding:0 22px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 24px; border-radius:999px; border:1px solid transparent;
  font-size:15px; font-weight:600; cursor:pointer; transition:.18s;
  white-space:nowrap; font-family:inherit;
}
.btn-primary{background:linear-gradient(135deg,var(--brand),#1a86bd); color:#fff; box-shadow:0 6px 18px rgba(14,92,138,.30);}
.btn-primary:hover{background:linear-gradient(135deg,var(--brand-dark),#1a86bd); color:#fff; transform:translateY(-1px);}
.btn-warm{background:linear-gradient(135deg,#e0894a,var(--warm)); color:#fff;}
.btn-warm:hover{background:linear-gradient(135deg,var(--warm),#c9682f); color:#fff; transform:translateY(-1px);}
.btn-ghost{background:#fff; color:var(--brand); border-color:#cfdde7;}
.btn-ghost:hover{border-color:var(--brand); background:var(--brand-soft); color:var(--brand-dark);}
.btn-lg{padding:15px 32px; font-size:16px;}

/* ---------- 顶部导航 ---------- */
.site-head{
  position:sticky; top:0; z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.head-inner{display:flex; align-items:center; gap:24px; height:68px;}
.logo{display:flex; align-items:center; flex:0 0 auto;}
.logo-img{display:block; height:38px; width:auto; max-width:220px; object-fit:contain;}
.logo-img-light{display:block; height:44px; width:auto; max-width:260px; object-fit:contain;}
.foot-brand{margin-bottom:14px;}
.nav{display:flex; align-items:center; gap:2px; margin-left:auto;}
.nav a{
  padding:9px 8px; border-radius:8px; font-size:14px; color:var(--ink-2); font-weight:500; white-space:nowrap;
}
.nav a:hover{background:var(--soft); color:var(--brand);}
.nav a.on{color:var(--brand); font-weight:600;}
.head-tel{
  display:flex; align-items:center; gap:7px; margin-left:6px;
  font-weight:700; font-size:15px; color:var(--brand); white-space:nowrap;
}
.menu-btn{
  display:none; margin-left:auto; width:40px; height:40px; border:1px solid var(--line);
  background:#fff; border-radius:9px; cursor:pointer; padding:0;
  align-items:center; justify-content:center;
}
.menu-btn span{display:block; width:17px; height:1.6px; background:var(--ink); position:relative;}
.menu-btn span::before,.menu-btn span::after{
  content:""; position:absolute; left:0; width:17px; height:1.6px; background:var(--ink);
}
.menu-btn span::before{top:-5.5px;} .menu-btn span::after{top:5.5px;}
.m-nav{display:none; border-top:1px solid var(--line); background:#fff;}
.m-nav.open{display:block;}
.m-nav a{display:block; padding:13px 22px; border-bottom:1px solid var(--soft); color:var(--ink-2); font-size:15px;}
.m-nav a:last-child{border-bottom:none;}

/* ---------- 首页主视觉（背景轮播） ---------- */
.hero{position:relative; overflow:hidden; background:#0b2130; border-bottom:1px solid var(--line);}
.hero::before{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:radial-gradient(120% 80% at 88% 100%, rgba(217,119,58,.34), transparent 55%);
}
.hero-slides{position:absolute; inset:0; z-index:0;}
.hero-slide{
  position:absolute; inset:0; opacity:0; transition:opacity 1.1s ease;
  background-size:cover; background-position:center 42%; will-change:opacity;
}
.hero-slide.on{opacity:1;}
.hero-slide::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(100deg,rgba(8,24,37,.90) 0%,rgba(8,24,37,.74) 40%,rgba(8,24,37,.34) 100%);
}
.hero-in{padding:46px 0 64px; position:relative; z-index:2;}
.hero-grid{display:grid; grid-template-columns:1fr 372px; gap:46px; align-items:center;}
.hero .eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family:var(--font-num);
  background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.22); border-radius:999px;
  padding:6px 15px; font-size:13.5px; font-weight:600; color:#d9e9f4; margin-bottom:18px;
}
.hero .eyebrow i{width:6px; height:6px; border-radius:50%; background:var(--warm); font-style:normal;}
.hero h1{font-size:54px; line-height:1.16; margin-bottom:18px; color:#fff; font-weight:900; letter-spacing:-1.6px; text-shadow:0 3px 22px rgba(0,0,0,.38);}
.hero h1 em{font-style:normal; background:linear-gradient(100deg,#ffe7c2 0%,#ff9e3e 100%); -webkit-background-clip:text; background-clip:text; color:transparent; text-shadow:0 0 28px rgba(255,174,94,.32);}
.nobr{white-space:nowrap;}
br.m-hide{display:inline;}
.hero-lead{font-size:17.5px; font-weight:500; color:rgba(255,255,255,.88); max-width:660px; margin-bottom:22px; line-height:1.7;}
.hero-btns{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:22px;}
.hero-btns .btn-ghost{background:rgba(255,255,255,.10); color:#fff; border-color:rgba(255,255,255,.36);}
.hero-btns .btn-ghost:hover{background:rgba(255,255,255,.20); color:#fff; border-color:#fff;}
/* 主按钮 + 热线合并为一行，降低首屏高度 */
.hero-actions{display:flex; flex-wrap:wrap; align-items:center; gap:14px; margin-bottom:22px;}
.hero-facts{display:flex; flex-wrap:wrap; gap:10px 26px; font-size:13.8px; color:rgba(255,255,255,.80);}
.hero-facts span{display:flex; align-items:center; gap:7px;}
.tick{
  width:15px; height:15px; border-radius:50%; background:rgba(255,255,255,.16); color:#8fd8f7;
  display:inline-flex; align-items:center; justify-content:center; font-size:10px; flex:0 0 auto;
}
/* 轮播底部：图注 + 指示点 */
.hero-foot{position:absolute; left:0; right:0; bottom:24px; z-index:3; pointer-events:none;}
.hero-foot-in{display:flex; align-items:center; justify-content:space-between; gap:18px;}
.hero-cap{font-size:12.4px; color:rgba(255,255,255,.62); letter-spacing:.4px;}
.hero-cap b{color:rgba(255,255,255,.86); font-weight:600;}
.hero-dots{display:flex; gap:8px; pointer-events:auto;}
.hero-dots button{
  width:24px; height:4px; border:none; border-radius:99px; padding:0; cursor:pointer;
  background:rgba(255,255,255,.34); transition:.25s;
  /* 视觉上仍是 4px 细线，但把可点区域扩到 26px 高，手机上才点得中 */
  position:relative;
}
.hero-dots button::after{
  content:""; position:absolute; left:-6px; right:-6px; top:50%;
  height:26px; transform:translateY(-50%);
}
.hero-dots button.on{background:#fff; width:38px;}
.hero-card{
  background:#fff; border:1px solid var(--line); border-radius:16px;
  padding:20px 22px 18px; box-shadow:var(--shadow-lg);
}
.hero-card h3{font-size:16.5px; margin-bottom:4px;}
.hero-card .sub{font-size:12.8px; color:var(--muted); margin-bottom:14px;}

/* ---------- 表单 ---------- */
.form-row{margin-bottom:12px;}
.form-row label{display:block; font-size:13px; color:var(--ink-2); margin-bottom:5px; font-weight:500;}
.form-row label b{color:var(--warm); font-weight:600;}
.field{
  width:100%; padding:11px 13px; border:1px solid #d8e2ea; border-radius:9px;
  font-size:15px; font-family:inherit; color:var(--ink); background:#fff; transition:.16s;
}
.field:focus{outline:none; border-color:var(--brand); box-shadow:0 0 0 3px rgba(14,92,138,.10);}
.field.err{border-color:#d64545; box-shadow:0 0 0 3px rgba(214,69,69,.10);}
select.field{appearance:none; background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%; background-size:5px 5px,5px 5px; background-repeat:no-repeat;}
textarea.field{resize:vertical; min-height:78px;}
/* 意向系统：多选胶囊，点选比下拉更快、更少流失 */
.form-row label .opt{font-style:normal; font-size:11.5px; font-weight:600; color:var(--muted); margin-left:6px;}
.chips{display:flex; flex-wrap:wrap; gap:7px;}
.chip{position:relative; display:inline-flex; flex:0 0 auto; margin:0;}
.chip input{position:absolute; opacity:0; width:1px; height:1px; pointer-events:none;}
.chip span{
  display:inline-block; padding:8px 13px; border:1px solid #d8e2ea; border-radius:999px;
  background:#fff; font-size:13px; line-height:1; color:var(--ink-2);
  cursor:pointer; user-select:none; transition:.18s; white-space:nowrap;
}
.chip:hover span{border-color:#bcd6e5; color:var(--brand-dark);}
.chip input:checked + span{
  background:var(--brand-soft); border-color:var(--brand);
  color:var(--brand-dark); font-weight:700;
  box-shadow:0 3px 10px rgba(14,92,138,.12);
}
.chip input:focus-visible + span{outline:2px solid var(--brand); outline-offset:2px;}
.chip input.err + span{border-color:#d64545;}
.agree{display:flex; gap:9px; align-items:flex-start; font-size:12.5px; color:var(--muted); line-height:1.6; margin:12px 0 14px;}
.agree input{margin:3px 0 0; flex:0 0 auto; width:15px; height:15px; accent-color:var(--brand);}
.form-tip{font-size:12px; color:#d64545; min-height:0; margin-top:6px; display:none;}
.form-tip.show{display:block;}
.form-ok{
  display:none; background:#eef9f1; border:1px solid #c8e6d1; color:#0f7a43;
  border-radius:10px; padding:14px 16px; font-size:14px; margin-top:12px;
}
.form-ok.show{display:flex; align-items:flex-start;}
.form-ok strong{display:block; margin-bottom:3px;}

/* ---------- 区块 ---------- */
.sec{padding:66px 0;}
.sec.soft{background:linear-gradient(180deg,#f3f9fc 0%,#fbf6f1 100%); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.sec-head{max-width:720px; margin-bottom:34px;}
.sec-head.center{margin-left:auto; margin-right:auto; text-align:center;}
.sec-tag{display:inline-block; font-size:13.5px; font-weight:800; color:#fff; letter-spacing:1.6px; text-transform:uppercase;
  background:linear-gradient(135deg,var(--warm),#e89a4a); border-radius:999px; padding:6px 16px; margin-bottom:14px;}
.sec h2{font-size:38px; margin-bottom:14px; font-weight:900; letter-spacing:-1px; line-height:1.18;}
.sec-head h2{position:relative;}
.sec-head h2::after{content:""; display:block; width:62px; height:5px; border-radius:99px; margin-top:16px;
  background:linear-gradient(90deg,var(--warm),#f0b14a);}
.sec-head.center h2::after{margin-left:auto; margin-right:auto;}
.sec-desc{color:var(--ink-2); font-size:16.5px; line-height:1.8;}

/* ---------- 系统卡片 ---------- */
.cards{display:grid; grid-template-columns:repeat(4,1fr); gap:16px;}
.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  padding:22px 20px; transition:.2s; display:block; color:inherit; position:relative;
}
.card:hover{border-color:#bcd6e5; box-shadow:var(--shadow-lg); transform:translateY(-3px); color:inherit;}
.card .ico{
  width:42px; height:42px; border-radius:11px; background:var(--brand-soft); color:var(--brand);
  display:flex; align-items:center; justify-content:center; margin-bottom:14px;
}
.sys-heat .ico,.sys-air .ico,.sys-ground .ico,.sys-fan .ico,.sys-wind .ico,.sys-drop .ico,.sys-water .ico,.sys-temp .ico{
  background:linear-gradient(135deg,var(--sys2),var(--sys)); color:#fff; box-shadow:0 6px 16px var(--sys-soft);
}
.card h3{font-size:19px; font-weight:800; margin-bottom:7px; letter-spacing:-.4px;}
.card-motto{
  display:inline-block; margin-left:8px; font-size:11.5px; font-weight:600; letter-spacing:1px;
  color:var(--warm); background:var(--warm-soft); border-radius:5px; padding:2px 7px;
  vertical-align:1.5px;
}
.sys-heat .card-motto,.sys-air .card-motto,.sys-ground .card-motto,.sys-fan .card-motto,.sys-wind .card-motto,.sys-drop .card-motto,.sys-water .card-motto,.sys-temp .card-motto{
  color:var(--sys); background:var(--sys-soft);
}
.card p{font-size:13.6px; color:var(--ink-2); line-height:1.75; margin:0;}
.card .go{font-size:13px; color:var(--brand); font-weight:600; margin-top:12px; display:inline-flex; gap:5px; align-items:center;}

/* ---------- 优势 ---------- */
.advs{display:grid; grid-template-columns:repeat(3,1fr); gap:18px;}
.adv{position:relative; background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px 24px 24px; overflow:hidden; transition:.25s;}
.adv:hover{border-color:#cfe0ec; box-shadow:var(--shadow); transform:translateY(-3px);}
.adv .ico{width:46px; height:46px; border-radius:13px; background:linear-gradient(135deg,var(--brand) 0%,#1a86bd 100%); color:#fff; display:flex; align-items:center; justify-content:center; margin-bottom:16px; box-shadow:0 6px 16px rgba(14,92,138,.22);}
.adv .n{position:absolute; top:22px; right:22px; font-size:12px; font-weight:700; color:var(--muted); letter-spacing:1px; opacity:.45;}
.adv h3{font-size:20px; margin-bottom:8px; letter-spacing:-.4px;}
.adv p{font-size:14px; color:var(--ink-2); margin:0; line-height:1.75;}

/* ---------- 步骤 ---------- */
.steps{counter-reset:s; display:grid; grid-template-columns:repeat(7,1fr); gap:10px;}
.step{background:#fff; border:1px solid var(--line); border-radius:10px; padding:16px 14px; position:relative;}
.step::before{
  counter-increment:s; content:counter(s,String,decimal-leading-zero);
  font-size:12px; font-weight:700; color:var(--brand); display:block; margin-bottom:7px;
}
.step h4{font-size:14.5px; margin-bottom:4px;}
.step p{font-size:12.6px; color:var(--muted); margin:0; line-height:1.6;}

/* ---------- 数据条 ---------- */
.stats{display:grid; grid-template-columns:repeat(4,1fr); gap:18px; text-align:center;}
.stat b{display:block; font-family:var(--font-num); font-size:50px; font-weight:800; line-height:1.05; letter-spacing:-1.5px;
  background:linear-gradient(135deg,var(--brand),var(--warm) 80%); -webkit-background-clip:text; background-clip:text; color:transparent;}
.stat span{font-size:14.5px; color:var(--ink-2); font-weight:500;}

/* ---------- 品牌口号 / 服务热线（用于深色首屏） ---------- */
.slogan{
  font-size:19px; font-weight:700; color:#f2b183; letter-spacing:1px;
  margin:0 0 9px; line-height:1.5;
}
.slogan span{font-weight:400; color:rgba(255,255,255,.62); font-size:14px; letter-spacing:.5px; margin-left:10px;}
.hotline{
  display:inline-flex; align-items:center; gap:13px;
  background:rgba(255,255,255,.10); border:1px solid rgba(255,255,255,.22);
  border-radius:13px; padding:10px 20px 10px 13px;
  margin:0; transition:.18s;
}
.hotline:hover{background:rgba(255,255,255,.17); border-color:rgba(255,255,255,.42);}
.hotline .hi{
  width:38px; height:38px; border-radius:11px; background:rgba(255,255,255,.16); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:18px; flex:0 0 auto;
}
.hotline small{display:block; font-size:12px; color:rgba(255,255,255,.62); line-height:1.25; letter-spacing:.5px;}
.hotline b{font-size:22px; color:#fff; line-height:1.3; letter-spacing:.6px; font-variant-numeric:tabular-nums;}
.hotline:hover b{color:#fff;}

/* ---------- 工程案例 ---------- */
.cases{display:grid; grid-template-columns:repeat(3,1fr); gap:16px;}
.case{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; transition:.2s; display:flex; flex-direction:column;
}
/* 整卡可点：<a> 铺满卡片，内部同样纵向排列，保证各卡片等高 */
.case-link{display:flex; flex-direction:column; flex:1; height:100%; color:inherit; text-decoration:none;}
.case:hover{border-color:#bcd6e5; box-shadow:var(--shadow-lg); transform:translateY(-3px);}
.case-top{
  height:150px; padding:0 20px; position:relative; overflow:hidden;
  background-color:var(--sys); background-size:cover; background-position:center;
  color:#fff; display:flex; align-items:center; justify-content:space-between;
}
.case-top::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(120deg,rgba(8,24,37,.66) 0%,rgba(8,24,37,.34) 100%);
}
.case-top::after{
  content:""; position:absolute; right:-46px; bottom:-70px; width:170px; height:170px;
  border-radius:50%; background:rgba(255,255,255,.10);
}
.case-img{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0;
  transition:transform .5s ease;}
.case-top::before{z-index:1;}
.case-top .ico,.case-top .loc,.cap-badge{position:relative; z-index:2;}
.case-top .ico{width:46px; height:46px; border-radius:12px; background:rgba(255,255,255,.18); display:flex; align-items:center; justify-content:center; color:#fff;}
.case-top .loc{font-size:13px; background:rgba(255,255,255,.20); border-radius:999px; padding:4px 13px; position:relative;}
.cap-badge{
  position:absolute; top:12px; left:14px; z-index:3;
  font-size:11px; font-weight:600; letter-spacing:.5px; color:#fff;
  background:rgba(8,24,37,.42); border:1px solid rgba(255,255,255,.28); border-radius:999px; padding:3px 10px;
}
.case-in{padding:18px 20px 20px;}
.case h3{font-size:19px; font-weight:800; margin-bottom:8px; letter-spacing:-.4px;}
.case p{font-size:13.6px; color:var(--ink-2); line-height:1.75; margin:0 0 13px;}
.case-meta{display:flex; flex-wrap:wrap; gap:6px; list-style:none; padding:0; margin:0;}
.case-meta li{font-size:12.4px; color:var(--sys); background:var(--sys-soft); border-radius:6px; padding:3px 10px; margin:0;}
.case-in{display:flex; flex-direction:column; flex:1;}
.case-more{margin-top:auto; padding-top:13px; display:flex; align-items:center; gap:6px;
  font-size:13px; font-weight:800; color:var(--sys);}
.case-more i{font-style:normal; transition:transform .22s ease;}
.case:hover .case-more i{transform:translateX(4px);}

/* ---------- 案例详情页 ---------- */
.case-hero{background:var(--soft); border-bottom:1px solid var(--line); padding:28px 0 36px;}
.ch-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:34px; align-items:center;}
.ch-type{display:inline-block; font-size:12.6px; font-weight:700; letter-spacing:.6px; color:#fff;
  background:var(--sys); border-radius:999px; padding:5px 14px; margin-bottom:14px;}
.case-hero h1{font-size:36px; font-weight:900; color:var(--ink); letter-spacing:-1px; margin:0 0 14px;}
.ch-note{font-size:15px; color:var(--ink-2); line-height:1.85; margin:0 0 18px;}
.ch-meta{list-style:none; padding:0; margin:0; display:grid; gap:9px;}
.ch-meta li{font-size:13.6px; color:var(--ink-2); line-height:1.7;}
.ch-meta b{display:inline-block; min-width:74px; color:var(--muted); font-weight:700;}
.ch-fig{margin:0; border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-lg); background:#fff;}
.ch-fig img{display:block; width:100%; height:auto;}
.ch-fig figcaption{font-size:12px; color:var(--muted); padding:9px 14px; background:#fff; border-top:1px solid var(--line);}
.case-body{padding:34px 0 26px;}
.chips-row{display:flex; flex-wrap:wrap; gap:8px;}
.chips-row i{font-style:normal; font-size:13px; font-weight:700; color:var(--brand-dark);
  background:#f2f8fc; border:1px solid #dceaf4; border-radius:8px; padding:5px 12px;}
.rel-list{display:grid; grid-template-columns:repeat(3,1fr); gap:12px;}
.rel{display:flex; flex-direction:column; gap:5px; padding:14px 16px; border:1px solid var(--line);
  border-radius:10px; background:#fff; text-decoration:none; transition:.2s;}
.rel:hover{border-color:#bcd6e5; box-shadow:var(--shadow); transform:translateY(-2px);}
.rel-n{font-size:15px; font-weight:800; color:var(--ink); letter-spacing:-.2px;}
.rel-t{font-size:12.4px; color:var(--muted); line-height:1.6;}
@media (max-width:860px){
  .ch-grid{grid-template-columns:1fr; gap:22px;}
  .case-hero h1{font-size:28px;}
  .rel-list{grid-template-columns:1fr;}
  .case-hero{padding:22px 0 28px;}
}
.grp{margin-bottom:46px;}
.grp:last-child{margin-bottom:0;}
.grp h2{
  font-size:26px; font-weight:900; margin-bottom:20px; padding-bottom:14px; border-bottom:2px solid var(--line);
  display:flex; align-items:center; gap:12px; letter-spacing:-.6px;
}
.grp h2::before{content:""; width:6px; height:26px; border-radius:4px; flex:0 0 auto;
  background:linear-gradient(180deg,var(--warm),#e89a4a);}
.grp h2 .grp-n{font-size:13px; font-weight:500; color:var(--muted);}

/* ---------- 全流程服务链（8 步 · 双列卡片，一句话一条） ---------- */
.flowsteps{position:relative;}
/* 阶段图例：一行讲清 4 个阶段，不再为阶段单独占行 */
.fs-legend{display:flex; flex-wrap:wrap; gap:8px 20px; margin:0 0 16px;
  font-size:12.6px; font-weight:600; color:var(--muted);}
.fl-item{display:inline-flex; align-items:center; gap:7px;}
.fl-dot{width:8px; height:8px; border-radius:50%; flex:0 0 auto;}
.fl-dot.ph1{background:#0e5c8a;} .fl-dot.ph2{background:#1a86bd;}
.fl-dot.ph3{background:#e89a4a;} .fl-dot.ph4{background:#1f9d76;}
.fs-grid{list-style:none; margin:0; padding:0; display:grid;
  grid-template-columns:repeat(2,1fr); gap:14px;}
.fstep{position:relative; overflow:hidden; display:flex; flex-direction:column;
  background:#fff; border:1px solid var(--line); border-left:3px solid var(--ph,#dbe5ee);
  border-radius:12px; padding:16px 19px 14px; transition:.26s;}
.fstep.ph1{--ph:#0e5c8a;} .fstep.ph2{--ph:#1a86bd;}
.fstep.ph3{--ph:#e89a4a;} .fstep.ph4{--ph:#1f9d76;}
.fstep:hover{transform:translateY(-3px); border-color:#bcd6e5;
  border-left-color:var(--ph); box-shadow:0 14px 32px rgba(14,92,138,.10);}
.fs-ghost{position:absolute; right:12px; bottom:0; font-size:62px; font-weight:900; line-height:1;
  color:#f1f7fc; letter-spacing:-2px; pointer-events:none; user-select:none;}
.fs-top{display:flex; align-items:center; gap:10px; margin-bottom:10px; position:relative; z-index:1;}
.fs-ic{width:34px; height:34px; border-radius:10px; flex:0 0 auto; color:#fff;
  background:linear-gradient(135deg,var(--brand) 0%,#1a86bd 100%);
  display:flex; align-items:center; justify-content:center; box-shadow:0 5px 14px rgba(14,92,138,.2);}
.fs-kicker{font-size:10.8px; font-weight:800; letter-spacing:1.4px; text-transform:uppercase; color:var(--muted);}
.fs-dur{margin-left:auto; font-size:11.5px; font-weight:800; color:var(--brand-dark);
  background:var(--brand-soft); border:1px solid #d8e9f4; padding:4px 10px; border-radius:999px; white-space:nowrap;}
.fstep h3{margin:0 0 6px; font-size:19px; font-weight:800; color:var(--ink); letter-spacing:-.3px; position:relative; z-index:1;}
.fs-brief{margin:0 0 12px; font-size:13.6px; color:var(--ink-2); line-height:1.68; position:relative; z-index:1;}
.fs-deliver{display:flex; flex-wrap:wrap; align-items:center; gap:7px; margin-top:auto;
  padding-top:11px; border-top:1px dashed var(--line); position:relative; z-index:1;}
.fs-deliver b{font-size:11.5px; font-weight:800; color:var(--muted); letter-spacing:.8px; margin-right:2px;}
.fs-deliver i{font-style:normal; font-size:12.2px; font-weight:700; color:var(--brand-dark);
  background:#f2f8fc; border:1px solid #dceaf4; padding:4px 10px; border-radius:8px;}

/* ---------- 可承接品牌 ---------- */
/* ---------- 滚动品牌墙 ---------- */
.brandbox{
  background:linear-gradient(180deg,#fff 0%,#f7fafc 100%);
  border:1px solid var(--line); border-radius:var(--radius);
  padding:28px 22px; overflow:hidden;
  position:relative;
}
.brandbox::before,.brandbox::after{
  content:""; position:absolute; top:0; bottom:0; width:42px; z-index:2; pointer-events:none;
}
.brandbox::before{left:0; background:linear-gradient(90deg,#f7fafc 0%,rgba(247,250,252,0) 100%);}
.brandbox::after{right:0; background:linear-gradient(270deg,#f7fafc 0%,rgba(247,250,252,0) 100%);}
.brand-marquee{display:flex; flex-direction:column; gap:16px;}
.brand-track{display:flex; width:max-content; will-change:transform;}
.brand-track.track-left{animation:scrollLeft 34s linear infinite;}
.brand-track.track-right{animation:scrollRight 38s linear infinite;}
/* 四行速度略有差异，观感更自然 */
.brand-marquee .brand-track:nth-child(1){animation-duration:34s;}
.brand-marquee .brand-track:nth-child(2){animation-duration:40s;}
.brand-marquee .brand-track:nth-child(3){animation-duration:31s;}
.brand-marquee .brand-track:nth-child(4){animation-duration:37s;}
/* 悬停任意一行，全部暂停，方便看清品牌 */
.brand-marquee:hover .brand-track{animation-play-state:paused;}
.brand-group{display:flex; gap:16px; padding:0 8px;}
@keyframes scrollLeft{
  0%{transform:translateX(0);}
  100%{transform:translateX(-50%);}
}
@keyframes scrollRight{
  0%{transform:translateX(-50%);}
  100%{transform:translateX(0);}
}
.brand-tile{
  flex:0 0 auto;
  width:220px; height:78px;
  background:#fff; border:1px solid var(--line); border-radius:13px;
  box-shadow:0 2px 8px rgba(22,32,44,.04);
  display:flex; align-items:center; padding:0 18px;
  transition:.28s; box-sizing:border-box;
}
.brand-tile.has-logo{justify-content:center;}
.brand-tile.has-wordmark{justify-content:flex-start; gap:14px;}
.brand-tile:hover{border-color:var(--bc); box-shadow:0 10px 26px rgba(14,92,138,.12); transform:translateY(-4px);}
.bm{
  width:40px; height:40px; border-radius:11px; flex:0 0 auto;
  background:var(--bmbg,var(--brand)); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-size:15px; font-weight:700; letter-spacing:.2px;
}
.bw{display:flex; flex-direction:column; align-items:flex-start; line-height:1.2; text-align:left;}
.bw b{font-size:17px; font-weight:800; color:#33424f; letter-spacing:.4px; transition:.25s;}
.bw small{font-size:10px; color:#9aa7b2; text-transform:uppercase; letter-spacing:.6px; margin-top:3px; transition:.25s;}
.brand-tile:hover .bw b,.brand-tile:hover .bw small{color:var(--bc);}
.brand-logo{max-height:46px; max-width:152px; width:auto; object-fit:contain; filter:grayscale(1); opacity:.82; transition:.28s;}
.brand-tile:hover .brand-logo{filter:none; opacity:1;}
.brandbox + .note{margin-top:18px; text-align:center;}

/* ---------- 服务区域 ---------- */
.cities{display:grid; grid-template-columns:repeat(4,1fr); gap:14px;}
.city{background:#fff; border:1px solid var(--line); border-radius:12px; padding:18px 20px; transition:.24s;}
.city:hover{border-color:#bcd6e5; box-shadow:0 12px 28px rgba(14,92,138,.09); transform:translateY(-2px);}
.city-top{display:flex; align-items:center; gap:10px; margin-bottom:9px;}
.city h4{font-size:19px; font-weight:800; color:var(--brand-dark); margin:0; letter-spacing:-.3px;}
.city-role{font-size:10.8px; font-weight:800; letter-spacing:.6px; color:var(--muted);
  background:#f2f6fa; border:1px solid var(--line); padding:3px 8px; border-radius:6px; white-space:nowrap;}
.city-role.is-hq{color:#fff; background:linear-gradient(135deg,var(--brand) 0%,#1a86bd 100%); border-color:transparent;}
.city p{font-size:13.2px; color:var(--ink-2); line-height:1.78; margin:0;}
.city-region{margin-top:12px; padding-top:11px; border-top:1px dashed var(--line);
  font-size:11.8px; font-weight:700; color:var(--brand); letter-spacing:.4px;}
.note{font-size:12.8px; color:var(--muted); line-height:1.8; margin:14px 0 0;}
/* 内容更新日期：告诉搜索引擎与 AI 内容新鲜度 */
.updated{margin:26px 0 0; padding-top:14px; border-top:1px solid var(--line);
  font-size:12.6px; color:var(--muted); line-height:1.8;}

/* ---------- 系统页：短标语 + 系统形态 ---------- */
.motto{
  display:inline-block; font-size:13.5px; font-weight:600; letter-spacing:3px;
  color:var(--warm); background:var(--warm-soft); border:1px solid #f2ddcb;
  border-radius:999px; padding:5px 16px 5px 19px; margin-bottom:16px;
}
.forms-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin:18px 0 6px;}
.fcard{background:#fff; border:1px solid var(--line); border-radius:11px; padding:18px 18px 16px; transition:.2s;}
.fcard:hover{border-color:#bcd6e5; box-shadow:var(--shadow);}
.fcard .fm{
  display:inline-block; font-size:12.4px; font-weight:700; color:#fff;
  background:var(--warm); border-radius:6px; padding:3px 10px; margin-bottom:11px; letter-spacing:1px;
}
.fcard h4{font-size:18px; font-weight:800; margin-bottom:9px; letter-spacing:-.3px;}
.fcard ul{margin:0; padding-left:17px;}
.fcard li{font-size:13.4px; color:var(--ink-2); line-height:1.72; margin:5px 0;}

/* ---------- 详情页 ---------- */
.crumb{font-size:13px; color:var(--muted); padding:20px 0 0;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.page-head{padding:26px 0 34px; border-bottom:1px solid var(--line);}
.page-head h1{font-size:46px; font-weight:900; margin-bottom:14px; letter-spacing:-1.2px; line-height:1.15;}
.page-head .lead{font-size:16.5px; color:var(--ink-2); max-width:760px; margin:0;}
.page-head .tags{display:flex; flex-wrap:wrap; gap:8px; margin-top:18px;}
.tag{background:var(--brand-soft); color:var(--brand); border-radius:999px; padding:5px 13px; font-size:13px; font-weight:500;}

/* ---------- 详情页深色头图 ---------- */
.page-head.has-img{position:relative; padding:0; border-bottom:none; overflow:hidden; background:#0b2130;}
.page-head.has-img .ph-bg{position:absolute; inset:0; z-index:0; background-size:cover; background-position:center 45%;}
.page-head.has-img .ph-bg::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(100deg,rgba(8,24,37,.93) 0%,rgba(8,24,37,.78) 46%,rgba(8,24,37,.44) 100%);
}
.page-head.has-img .wrap{position:relative; z-index:2; padding-top:34px; padding-bottom:42px;}
.page-head.has-img h1{color:#fff;}
.page-head.has-img .lead{color:rgba(255,255,255,.85);}
.page-head.has-img .motto{background:rgba(255,255,255,.13); border-color:rgba(255,255,255,.24); color:#f2c19a;}
.page-head.has-img .tag{background:rgba(255,255,255,.14); color:#e6f2fa; font-weight:500;}
.page-body{display:grid; grid-template-columns:1fr 340px; gap:44px; align-items:start; padding:44px 0 60px;}
.prose h2{font-size:28px; font-weight:800; margin:38px 0 14px; padding-top:8px; letter-spacing:-.6px;}
.prose h2:first-child{margin-top:0;}
.prose h3{font-size:17px; margin:24px 0 8px;}
.prose p, .prose li{font-size:15.4px; color:var(--ink-2);}
.prose strong{color:var(--ink);}
.panel{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:22px; box-shadow:var(--shadow); position:sticky; top:88px;}
.panel h3{font-size:16.5px; margin-bottom:6px;}
.panel .sub{font-size:13px; color:var(--muted); margin-bottom:16px;}
.panel-tel{display:block; text-align:center; font-size:21px; font-weight:700; color:var(--brand); margin:4px 0 14px; letter-spacing:.3px;}
.panel-note{font-size:12.5px; color:var(--muted); text-align:center; margin:10px 0 0;}
.boxlist{background:var(--soft); border:1px solid var(--line); border-radius:10px; padding:18px 20px; margin:16px 0;}
.boxlist ul{margin:0; padding-left:20px;}
.boxlist li{font-size:15px; color:var(--ink-2);}
.scengrid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin:16px 0;}
.scen{background:#fff; border:1px solid var(--line); border-radius:10px; padding:16px 18px;}
.scen h4{font-size:15px; margin-bottom:5px; color:var(--brand-dark);}
.scen p{font-size:13.6px; color:var(--ink-2); margin:0; line-height:1.7;}
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line); padding:4px 0;}
.faq summary{
  cursor:pointer; padding:15px 30px 15px 0; font-weight:600; font-size:15.4px; position:relative; list-style:none;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+"; position:absolute; right:6px; top:13px; font-size:20px; color:var(--muted); font-weight:400; transition:.2s;
}
.faq details[open] summary::after{content:"−"; color:var(--brand);}
.faq details p{font-size:14.8px; color:var(--ink-2); padding:0 0 16px; margin:0;}
.related{display:flex; flex-wrap:wrap; gap:9px; margin-top:14px;}
.related a{
  border:1px solid var(--line); border-radius:999px; padding:7px 15px; font-size:13.6px; color:var(--ink-2); background:#fff;
}
.related a:hover{border-color:var(--brand); color:var(--brand); background:var(--brand-soft);}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(120deg,var(--brand) 0%,#1a86bd 52%,#e0884a 122%);
  color:#fff; border-radius:16px; padding:38px 40px;
  display:grid; grid-template-columns:1fr 320px; gap:34px; align-items:center;
}
.cta h2{font-size:30px; font-weight:800; margin-bottom:10px; color:#fff; letter-spacing:-.6px;}
.cta p{color:rgba(255,255,255,.86); font-size:15px; margin:0;}
.cta-facts{display:flex; flex-wrap:wrap; gap:8px 20px; margin-top:16px; font-size:13.6px; color:rgba(255,255,255,.9);}
.cta .hero-card{box-shadow:none;}

/* ---------- 页脚 ---------- */
.site-foot{background:#12212e; color:#a9bacb; padding:56px 0 0; font-size:14px;}
.foot-grid{display:grid; grid-template-columns:1.5fr 1fr 1fr 1.2fr; gap:34px; padding-bottom:38px;}
.site-foot h4{color:#fff; font-size:15px; margin-bottom:14px;}
.site-foot a{color:#a9bacb;}
.site-foot a:hover{color:#fff;}
.site-foot ul{list-style:none; padding:0; margin:0;}
.site-foot li{margin:7px 0;}
.foot-brand{display:flex; align-items:center; margin-bottom:14px;}
.foot-bottom{border-top:1px solid rgba(255,255,255,.10); padding:18px 0 26px; font-size:13px; color:#7d90a3; display:flex; flex-wrap:wrap; gap:8px; justify-content:space-between;}

/* ---------- 悬浮客服 ---------- */
.fab{
  position:fixed; right:22px; bottom:92px; z-index:120;
  width:56px; height:56px; border-radius:50%; border:none; cursor:pointer;
  background:var(--brand); color:#fff; box-shadow:0 8px 24px rgba(14,92,138,.34);
  display:flex; align-items:center; justify-content:center; transition:.2s;
}
.fab:hover{transform:scale(1.06); background:var(--brand-dark);}
.fab .badge{
  position:absolute; top:-3px; right:-3px; min-width:19px; height:19px; border-radius:10px;
  background:var(--warm); color:#fff; font-size:11px; line-height:19px; padding:0 5px; font-weight:600;
}
.chat-panel{
  position:fixed; right:22px; bottom:160px; z-index:121;
  width:346px; max-width:calc(100vw - 32px);
  background:#fff; border:1px solid var(--line); border-radius:16px;
  box-shadow:0 20px 50px rgba(22,32,44,.20); overflow:hidden;
  display:none; flex-direction:column;
}
.chat-panel.open{display:flex;}
.chat-head{background:linear-gradient(135deg,var(--brand),#1285bd); color:#fff; padding:16px 18px; display:flex; gap:12px; align-items:center;}
.chat-head .av{width:38px; height:38px; border-radius:11px; background:rgba(255,255,255,.18); display:flex; align-items:center; justify-content:center; font-weight:700; flex:0 0 auto;}
.chat-head b{display:block; font-size:15px;}
.chat-head small{opacity:.82; font-size:12px;}
.chat-head .x{margin-left:auto; background:none; border:none; color:#fff; font-size:20px; cursor:pointer; line-height:1; padding:4px; opacity:.85;}
.chat-body{padding:16px 18px; max-height:52vh; overflow-y:auto;}
/* ---------- 智能客服对话（自建知识库 / 大模型） ---------- */
/* ---------- 隐私政策页 ---------- */
.pblock p{font-size:14.4px; line-height:1.9; color:var(--ink-2); margin:0 0 4px;}
.pblock p.pnote{margin-top:10px; font-size:13.4px; color:var(--muted); background:var(--soft);
  border-left:3px solid var(--line); border-radius:0 8px 8px 0; padding:10px 14px; line-height:1.8;}
.prose h2{font-size:19px; font-weight:800; color:var(--ink); letter-spacing:-.3px;
  margin:30px 0 12px; padding-bottom:9px; border-bottom:1px solid var(--line);}
.prose h2:first-child{margin-top:0;}
.ptable{width:100%; border-collapse:collapse; margin:6px 0; font-size:13.4px; background:#fff;}
.ptable th,.ptable td{border:1px solid var(--line); padding:10px 12px; text-align:left; line-height:1.7;}
.ptable th{background:var(--soft); font-weight:800; color:var(--ink); white-space:nowrap;}
.ptable td{color:var(--ink-2);}
.prose ul{margin:6px 0; padding-left:20px;}
.prose ul li{font-size:14.4px; line-height:1.9; color:var(--ink-2); margin-bottom:5px;}

/* ---------- 404 ---------- */
.notfound{text-align:center; padding:70px 0 80px;}
.nf-code{font-family:var(--font-num); font-size:96px; font-weight:800; line-height:1;
  background:linear-gradient(135deg,#0e5c8a 0%,#d9773a 100%); -webkit-background-clip:text;
  background-clip:text; color:transparent; letter-spacing:-3px;}
.notfound h1{font-size:28px; font-weight:800; color:var(--ink); margin:14px 0 10px; letter-spacing:-.5px;}
.notfound > p{font-size:15px; color:var(--ink-2); margin:0 auto 24px; max-width:520px; line-height:1.8;}
.nf-links{display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-bottom:30px;}
.nf-sys{font-size:13.4px; color:var(--muted); line-height:2.1; max-width:760px; margin:0 auto 22px;}
.nf-sys a{color:var(--brand-dark); margin:0 5px;}
.nf-tel{font-size:13.8px; color:var(--ink-2);}
.nf-tel a{color:var(--brand); font-weight:800;}

/* 可选营销勾选（视觉弱化，避免干扰主转化） */
.agree-opt{margin-top:2px;}
.agree-opt span{color:var(--muted)!important; font-size:12.6px!important;}

.chat-foot{display:none; border-top:1px solid var(--line); padding:11px 14px 12px; background:#fff;}
.chat-panel.local .chat-foot{display:block;}
.chat-quick{display:flex; flex-wrap:wrap; gap:6px; margin-bottom:9px;}
.chat-quick button{font:inherit; font-size:12.4px; padding:5px 10px; border-radius:999px;
  border:1px solid var(--line); background:#fff; color:var(--ink-2); cursor:pointer; transition:.18s;}
.chat-quick button:hover{border-color:var(--brand); color:var(--brand-dark); background:var(--brand-soft);}
.chat-form{display:flex; gap:8px;}
.chat-input{flex:1; min-width:0; padding:10px 12px; border:1px solid #d8e2ea; border-radius:9px;
  font-size:14px; font-family:inherit; color:var(--ink);}
.chat-input:focus{outline:none; border-color:var(--brand); box-shadow:0 0 0 3px rgba(14,92,138,.10);}
.chat-send{flex:0 0 auto; padding:0 16px; border:none; border-radius:9px; background:var(--brand);
  color:#fff; font-size:14px; font-weight:700; cursor:pointer; font-family:inherit;}
.chat-send:hover{background:var(--brand-dark);}
.chat-send:disabled{opacity:.5; cursor:not-allowed;}
.chat-note{margin:8px 0 0; font-size:11.8px; color:var(--muted); text-align:center;}
.chat-msgs{display:flex; flex-direction:column; gap:9px;}
.msg{max-width:86%; padding:10px 13px; border-radius:12px; font-size:13.8px; line-height:1.72;
  white-space:pre-wrap; word-break:break-word;}
.msg.bot{align-self:flex-start; background:#f2f7fb; border:1px solid #e2edf6;
  color:var(--ink); border-bottom-left-radius:4px;}
.msg.me{align-self:flex-end; background:var(--brand); color:#fff; border-bottom-right-radius:4px;}
.msg.sys{align-self:center; max-width:96%; background:#eef9f1; border:1px solid #c8e6d1;
  color:#0f7a43; font-size:12.6px; text-align:center;}
.typing{align-self:flex-start; display:flex; gap:5px; padding:12px 14px; background:#f2f7fb;
  border:1px solid #e2edf6; border-radius:12px; border-bottom-left-radius:4px;}
.typing i{width:6px; height:6px; border-radius:50%; background:#b6c6d3; display:block;}
@keyframes tp{0%,60%,100%{opacity:.35; transform:translateY(0);}30%{opacity:1; transform:translateY(-3px);}}
.typing i:nth-child(1){animation:tp 1.2s infinite;}
.typing i:nth-child(2){animation:tp 1.2s .18s infinite;}
.typing i:nth-child(3){animation:tp 1.2s .36s infinite;}
@media (max-width:560px){
  .chat-body{padding:13px 13px;}
  .msg{font-size:13.4px;}
  .chat-quick button{font-size:12px; padding:5px 9px;}
}
.chat-msg{background:var(--soft); border-radius:12px; padding:11px 14px; font-size:14px; color:var(--ink-2); line-height:1.7;}
.chat-msg + .chat-msg{margin-top:9px;}
.chat-acts{display:grid; gap:9px; margin:14px 0 4px;}
.chat-acts a{
  display:flex; align-items:center; gap:10px; border:1px solid var(--line); border-radius:10px;
  padding:11px 13px; font-size:14px; color:var(--ink-2); background:#fff;
}
.chat-acts a:hover{border-color:var(--brand); background:var(--brand-soft); color:var(--brand-dark);}
.chat-acts a b{font-weight:600; display:block; font-size:14px; color:var(--ink);}
.chat-acts a small{color:var(--muted); font-size:12px;}
.chat-divider{display:flex; align-items:center; gap:10px; color:var(--muted); font-size:12px; margin:16px 0 10px;}
.chat-divider::before,.chat-divider::after{content:""; height:1px; background:var(--line); flex:1;}
.chat-hello{background:var(--brand-soft); border-radius:12px 12px 12px 4px; padding:11px 14px; font-size:13.6px; color:var(--brand-dark); margin-bottom:10px;}

/* ---------- 移动端底部操作条 ---------- */
.m-bar{
  position:fixed; left:0; right:0; bottom:0; z-index:130; display:none;
  background:rgba(255,255,255,.97); backdrop-filter:blur(10px);
  border-top:1px solid var(--line); padding:8px 10px calc(8px + env(safe-area-inset-bottom));
  gap:8px;
}
.m-bar a{
  flex:1; text-align:center; padding:11px 6px; border-radius:10px; font-size:14.5px; font-weight:600;
  color:var(--ink-2); border:1px solid var(--line);
}
.m-bar a.main{background:var(--brand); color:#fff; border-color:var(--brand);}
.m-bar a.warm{background:var(--warm-soft); color:var(--warm); border-color:#f0d8c6;}

/* ---------- 工具类 ---------- */
.mt0{margin-top:0;} .mb0{margin-bottom:0;} .center{text-align:center;}
.soft-note{background:var(--warm-soft); border:1px solid #f2ddcb; border-radius:10px; padding:14px 18px; font-size:14px; color:#8a4a1a;}
.hide{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1040px){
  .cards{grid-template-columns:repeat(2,1fr);}
  .advs{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(3,1fr);}
  .page-body{grid-template-columns:1fr; gap:32px;}
  .panel{position:static;}
  .hero-grid{grid-template-columns:1fr; gap:34px;}
  .cta{grid-template-columns:1fr; padding:30px 26px;}
  .foot-grid{grid-template-columns:1fr 1fr; gap:26px;}
  .cases{grid-template-columns:repeat(2,1fr);}
  .forms-grid{grid-template-columns:repeat(2,1fr);}
  .cities{grid-template-columns:repeat(2,1fr);}
  .brand-marquee{gap:14px;}
  .brand-tile{width:166px; height:64px; padding:0 12px;}
  .bm{width:32px; height:32px; font-size:13px;}
  .bw b{font-size:14px;}
  .bw small{font-size:9px;}
}
@media (max-width:860px){
  .nav,.head-tel{display:none;}
  .menu-btn{display:flex;}
  .hero-in{padding:44px 0 78px;}
  .hero h1{font-size:40px;}
  br.m-hide{display:none;}
  .hero-slide{background-position:center 34%;}
  .hero-foot-in{justify-content:center;}
  .hero-cap{display:none;}
  .page-head.has-img .wrap{padding-top:26px; padding-bottom:32px;}
  .sec{padding:46px 0;}
  .sec h2{font-size:30px;}
  .page-head h1{font-size:34px;}
  .stats{grid-template-columns:repeat(2,1fr); gap:22px 12px;}
  .stat b{font-size:40px;}
  .m-bar{display:flex;}
  .fab{bottom:78px; right:16px; width:50px; height:50px;}
  .chat-panel{bottom:auto; top:78px; right:12px; left:12px; width:auto; max-height:76vh;}
  body{padding-bottom:64px;}
  .scengrid{grid-template-columns:1fr;}
  .fs-grid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .cards{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .foot-grid{grid-template-columns:1fr;}
  .btn{width:100%;}
  .hero-btns .btn{width:100%;}
  .cases,.forms-grid{grid-template-columns:1fr;}
  .hotline{width:100%; justify-content:center;}
  .hero-actions{flex-direction:column; align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero h1{font-size:34px;}
  .sec h2{font-size:26px;}
  .page-head h1{font-size:28px;}
  .grp h2{font-size:22px;}
  .slogan{font-size:16.5px;}
  .slogan span{display:block; margin:4px 0 0;}
  .brandbox{padding:18px 16px;}
  .brand-marquee{gap:12px;}
  .brand-group{gap:12px; padding:0 6px;}
  .logo-img{height:30px; max-width:160px;}
  .logo-img-light{height:34px; max-width:180px;}
  /* 服务区域：窄屏单列 */
  .cities{grid-template-columns:1fr;}
  /* 流程卡片：窄屏收缩内边距与字号 */
  .fstep{padding:15px 15px 13px;}
  .fstep h3{font-size:18px;}
  .fs-ghost{font-size:54px; right:10px;}
  .fs-ic{width:34px; height:34px; border-radius:10px;}
  .fs-brief{font-size:13.2px;}
  .fs-legend{font-size:12px; gap:6px 14px; margin-bottom:13px;}
  .fs-deliver i{font-size:11.8px; padding:3px 9px;}
}
@media print{
  .site-head,.fab,.chat-panel,.m-bar,.cta,.to-top{display:none !important;}
  .sec{padding:20px 0;}
  .page-body{grid-template-columns:1fr;}
  .reveal{opacity:1 !important;transform:none !important;}
}

/* ============================================================
   交互增强：滚动入场 / 回到顶部 / 涟漪 / 客服过渡 / 计数 / 首屏载入
   设计目标：高级（克制留白与缓动）、舒适（柔和阴影与层级）、友好（即时微反馈）
   ============================================================ */

/* 滚动入场：初始隐藏态由 html.js 控制，避免脚本未加载时内容不可见 */
.reveal{transition:opacity .72s cubic-bezier(.2,.7,.2,1),transform .72s cubic-bezier(.2,.7,.2,1);will-change:opacity,transform;}
html.js .reveal{opacity:0;transform:translateY(22px);}
html.js .reveal.in{opacity:1;transform:none;}

/* 首屏载入淡入（首页 hero 内带 data-hero 的元素，逐层错峰） */
.hero-load [data-hero]{opacity:0;transform:translateY(16px);animation:heroIn .85s cubic-bezier(.2,.7,.2,1) both;}
@keyframes heroIn{to{opacity:1;transform:none;}}

/* 回到顶部 */
.to-top{
  position:fixed; right:22px; bottom:24px; z-index:115;
  width:46px; height:46px; border-radius:50%;
  border:1px solid var(--line); background:rgba(255,255,255,.92); backdrop-filter:blur(8px);
  color:var(--brand); cursor:pointer; display:flex; align-items:center; justify-content:center;
  box-shadow:var(--shadow-lg); opacity:0; transform:translateY(12px) scale(.9);
  pointer-events:none; transition:opacity .3s ease, transform .3s ease, background .2s, color .2s;
}
.to-top.show{opacity:1; transform:none; pointer-events:auto;}
.to-top:hover{background:#fff; color:var(--brand-dark);}
.to-top svg{width:20px; height:20px;}

/* 按钮：涟漪 + 按下态 */
.btn{position:relative; overflow:hidden; -webkit-tap-highlight-color:transparent;}
.btn:active{transform:translateY(0) scale(.975);}
.btn-primary{box-shadow:0 4px 14px rgba(14,92,138,.24);}
.btn-primary:hover{box-shadow:0 9px 24px rgba(14,92,138,.34);}
.btn-warm{box-shadow:0 4px 14px rgba(217,119,58,.24);}
.btn-warm:hover{box-shadow:0 9px 24px rgba(217,119,58,.34);}
.btn-ghost:hover{box-shadow:var(--shadow);}
.ripple{position:absolute; border-radius:50%; background:rgba(255,255,255,.45);
  transform:scale(0); animation:rip .6s ease-out; pointer-events:none; z-index:0;}
@keyframes rip{to{transform:scale(2.8); opacity:0;}}

/* 卡片图标微动 + 案例顶亮 */
.card .ico,.fcard .fm{transition:transform .28s ease;}
.card:hover .ico{transform:scale(1.08) rotate(-4deg);}
.fcard:hover .fm{transform:scale(1.04);}
.case:hover .case-img{transform:scale(1.06);}

/* 客服窗打开过渡（保留 display:flex，用 visibility 控制可见与过渡） */
.chat-panel{visibility:hidden; opacity:0; transform:translateY(12px) scale(.98);
  transition:opacity .26s ease, transform .26s ease, visibility .26s;}
.chat-panel.open{visibility:visible; opacity:1; transform:none;}
.fab .badge{animation:badgePulse 2.4s ease-in-out infinite; transform-origin:center;}
@keyframes badgePulse{0%,100%{transform:scale(1);}50%{transform:scale(1.18);}}

/* 表单成功：勾选圆 + 入场 */
.form-ok{position:relative;}
.form-ok.show{animation:okIn .42s ease both;}
@keyframes okIn{from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:none;}}
.form-ok .check{display:inline-flex; align-items:center; justify-content:center;
  width:26px; height:26px; border-radius:50%; background:#0f7a43; color:#fff;
  margin-right:9px; vertical-align:-7px; animation:checkPop .45s cubic-bezier(.2,1.5,.4,1) both;}
@keyframes checkPop{from{transform:scale(0);} to{transform:scale(1);}}

/* 数字计数：等宽数字，避免滚动时跳动 */
.stat b{font-variant-numeric:tabular-nums;}

/* 导航滚动态：轻微投影增强层级 */
.site-head.scrolled{box-shadow:0 6px 22px rgba(22,32,44,.10);}

/* 锚点滚动偏移：弥补 sticky 头部 68px 遮挡 */
html{scroll-padding-top:86px;}

/* 移动端底部操作条按压反馈 */
.m-bar a:active{transform:scale(.97);}

/* 减少动效偏好：关闭所有动画与平滑滚动，保证可读与无障碍 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal,.hero-load [data-hero]{opacity:1 !important;transform:none !important;animation:none !important;transition:none !important;}
  .to-top{transition:none;}
  .fab .badge{animation:none;}
  .btn:active{transform:none;}
  .card:hover .ico,.fcard:hover .fm,.case:hover .case-top::after{transform:none;}
  *{scroll-behavior:auto !important;}
}
@media (max-width:860px){
  /* 回到顶部：窄屏下必须抬到 AI 形象之上（两者原来几乎完全重叠，
     而形象 z-index 更高，导致「回到顶部」点不到、反而弹出 AI 对话） */
  .to-top{bottom:146px; right:16px; width:42px; height:42px;}
}

/* ---------- 页脚：其他联系方式（微信 / 抖音 / 小红书 二维码） ---------- */
.foot-qr{border-top:1px solid rgba(255,255,255,.14); margin-top:28px; padding-top:24px;}
.foot-qr-t{color:#8fa3b6; font-size:13.6px; margin:0 0 18px; text-align:center;}
.foot-qr-t b{color:#e8eef5; font-weight:600;}
.qr-row{display:flex; gap:18px; justify-content:center; flex-wrap:wrap;}
.qr-card{margin:0; width:154px; background:#fff; border-radius:12px; padding:9px 9px 10px;
  box-shadow:0 6px 18px rgba(0,0,0,.18);}
.qr-card a{display:block;}
.qr-card img{display:block; width:100%; height:auto; border-radius:6px;}
.qr-card figcaption{margin-top:9px; font-size:12.3px; line-height:1.45; color:#54657e; text-align:center;}
.qr-card figcaption b{display:block; font-size:13.4px; color:#0f1c2e; font-weight:700; margin-bottom:1px;}
/* 无二维码时（如抖音）的纯文字卡：与二维码卡等高等宽，视觉不塌 */
.qr-card-text{display:flex; flex-direction:column; justify-content:center; min-height:176px;}
.qr-code-txt{font-size:20px; font-weight:800; color:var(--brand); letter-spacing:.5px;
  word-break:break-all; line-height:1.3; padding:22px 4px;}
@media (max-width:640px){
  .qr-card{width:132px;}
  .qr-row{gap:12px;}
}


/* ============================================================
   施工实拍（PPT 素材落图模块）
   ============================================================ */
/* 首页「施工现场实拍」卡片条 */
.shotcards{display:grid; grid-template-columns:repeat(3,1fr); gap:14px;}
.shotcard{
  position:relative; display:block; border-radius:var(--radius); overflow:hidden;
  border:1px solid var(--line); background:#0b1a26; aspect-ratio:4/3; transition:.22s;
}
.shotcard img{width:100%; height:100%; object-fit:cover; transition:transform .55s ease;}
.shotcard::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(to top,rgba(6,18,28,.78) 0%,rgba(6,18,28,.16) 46%,rgba(6,18,28,0) 72%);
}
.shotcard:hover{border-color:#bcd6e5; box-shadow:var(--shadow-lg); transform:translateY(-3px);}
.shotcard:hover img{transform:scale(1.05);}
.shotcard .sc-cap{
  position:absolute; left:16px; right:16px; bottom:13px; z-index:2; color:#fff;
  display:flex; align-items:baseline; justify-content:space-between; gap:10px;
}
.shotcard .sc-cap b{font-size:15.4px; font-weight:800; letter-spacing:-.2px;}
.shotcard .sc-cap i{font-style:normal; font-size:12px; color:rgba(255,255,255,.72);
  background:rgba(255,255,255,.16); border-radius:999px; padding:2px 9px; flex:0 0 auto;}

/* 实拍相册（案例页 / 实拍页通用） */
.shotgrid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin:6px 0 12px;}
.shot{margin:0; border:1px solid var(--line); border-radius:10px; overflow:hidden; background:#fff;}
.shot img{width:100%; height:auto; aspect-ratio:4/3; object-fit:cover; transition:transform .5s ease;}
.shot:hover img{transform:scale(1.04);}
.shot figcaption{
  font-size:12.6px; color:var(--ink-2); line-height:1.6; padding:9px 12px;
  border-top:1px solid var(--line); background:var(--soft);
}
/* 施工实拍页：场景快跳 + 关联系统 */
.shotjump{display:flex; flex-wrap:wrap; gap:8px; padding:26px 0 8px;}
.shotjump a{
  display:inline-flex; align-items:center; gap:7px; font-size:13.4px; font-weight:700;
  color:var(--brand-dark); background:#fff; border:1px solid var(--line);
  border-radius:999px; padding:7px 15px; transition:.18s;
}
.shotjump a i{font-style:normal; font-size:11.6px; font-weight:700; color:var(--brand);
  background:var(--brand-soft); border-radius:999px; padding:1px 7px;}
.shotjump a:hover{border-color:#bcd6e5; background:var(--brand-soft);}
.shot-rel{font-size:14px; margin:2px 0 0;}
.shot-rel a{font-weight:700;}
/* 实拍封面角标：与「效果示意」区分 */
.cap-badge.cap-real{background:rgba(16,90,60,.62); border-color:rgba(180,240,210,.5);}

@media (max-width:1040px){
  .shotcards{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .shotgrid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .shotcards{grid-template-columns:1fr;}
  .shotjump a{font-size:12.8px; padding:6px 12px;}
}
@media print{
  .shotcards,.shotgrid{display:block;}
}

/* ============================================================
   AI 形象「小匠」—— 悬浮咨询入口 & 对话面板
   形象资产：assets/img/ai/ai-consultant.jpg（384px / 192px 两档）
   ============================================================ */
/* 悬浮按钮：真人形象撑满圆 + 呼吸光环 + AI 角标 */
.fab{
  width:62px; height:62px; padding:0;
  background:linear-gradient(160deg,#eaf5fd 0%,#c9e3f6 100%);
  box-shadow:0 10px 26px rgba(10,68,103,.30);
  overflow:visible;
}
.fab:hover{transform:scale(1.06) translateY(-1px); box-shadow:0 14px 30px rgba(10,68,103,.38);}
.fab .fab-av{
  position:absolute; inset:0; display:block;
  border-radius:50%; overflow:hidden;
  border:2px solid #fff; box-sizing:border-box;
  box-shadow:0 0 0 1.5px rgba(26,132,186,.5) inset;
}
.fab .fab-av-img{
  width:100%; height:100%; display:block;
  object-fit:cover; object-position:50% 18%;
  border-radius:50%;
  animation:aiBob 3.6s ease-in-out infinite;
}
/* 呼吸光环 */
.fab::after{
  content:""; position:absolute; inset:-3px; border-radius:50%;
  border:2px solid rgba(26,132,186,.45); pointer-events:none;
  animation:aiRing 2.8s ease-out infinite;
}
/* AI 角标 */
.fab .fab-tag{
  position:absolute; bottom:-5px; left:50%; transform:translateX(-50%);
  font-size:10px; font-weight:800; letter-spacing:.6px; line-height:1;
  padding:3px 8px 4px; border-radius:999px;
  background:linear-gradient(135deg,#1b93cd 0%,#0d4f74 100%); color:#fff;
  box-shadow:0 3px 9px rgba(10,68,103,.34);
  z-index:3;
}
.fab .badge{z-index:4;}
/* 面板头部头像 */
.chat-head .av{
  width:44px; height:44px; padding:0; border-radius:50%;
  background:rgba(255,255,255,.9); box-sizing:border-box;
  overflow:hidden; flex:0 0 auto;
  border:2px solid rgba(255,255,255,.85);
}
.chat-head .head-av-img{width:100%; height:100%; display:block; object-fit:cover; object-position:50% 18%;}
/* 窄屏底部操作条：AI 咨询按钮内嵌同一形象，与右下角悬浮入口保持视觉同源 */
.m-bar a .mb-av{
  display:inline-block; width:19px; height:19px; border-radius:50%;
  overflow:hidden; vertical-align:-4.5px; margin-right:5px;
  box-shadow:0 0 0 1px rgba(26,132,186,.30);
}
.m-bar a .mb-av-img{width:100%; height:100%; display:block; object-fit:cover; object-position:50% 18%;}
/* 助手消息带形象小头像 */
.msg.bot{
  position:relative; margin-left:30px;
}.msg.bot::before{
  content:""; position:absolute; left:-30px; top:1px;
  width:23px; height:23px; border-radius:50%;
  background:#e8f4fb no-repeat center/cover url("../img/ai/ai-consultant@192.jpg");
  border:1px solid #d6e9f5;
}
/* 形象动效 */
@keyframes aiBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-2.2px)}}
@keyframes aiRing{0%{transform:scale(.9); opacity:.6}70%{transform:scale(1.42); opacity:0}100%{transform:scale(1.42); opacity:0}}
@media (max-width:560px){
  .fab{width:56px; height:56px;}
  .msg.bot{margin-left:27px;}
  .msg.bot::before{left:-27px; width:21px; height:21px;}
  .chat-head .av{width:40px; height:40px;}
}
@media (prefers-reduced-motion:reduce){
  .fab .fab-av-img,.fab::after{animation:none !important;}
}

/* 导航 10 项防挤压：中窄屏先收电话，再缩菜单间距，保证菜单永远单行 */
@media (max-width:1240px){ .head-tel{display:none;} }
@media (max-width:1080px){
  .nav{gap:0;}
  .nav a{padding:8px 6px; font-size:13px;}
  .logo-img{max-width:170px;}
}
@media (max-width:980px){
  .nav{gap:0;}
  .nav a{padding:8px 5px; font-size:12.6px;}
  .logo-img{max-width:150px;}
}

/* why 卡片配图（施工实拍） */
.adv-img{display:block; width:100%; height:150px; object-fit:cover; border-radius:10px; margin-top:16px; background:#eef3f7;}

/* --- why 卡片布局优化：紧凑 + 图片通栏贴底 --- */
.adv{padding:22px 22px 0; display:flex; flex-direction:column;}
.adv .ico{width:42px; height:42px; border-radius:12px; margin-bottom:14px;}
.adv .n{top:20px; right:20px;}
.adv h3{font-size:18px; margin:0 0 8px;}
.adv p{font-size:13.5px; margin:0 0 18px; line-height:1.72;}
.adv-img{width:calc(100% + 44px); margin:auto -22px 0; height:140px; object-fit:cover; border-radius:0; background:#eef3f7;}

/* --- why 卡片：图标与标题同行 --- */
.adv{display:flex; flex-wrap:wrap; align-items:center; padding:22px 22px 0;}
.adv .ico{flex:0 0 auto; margin:0;}
.adv .n{top:34px;}
.adv h3{flex:1 1 auto; margin:0; padding-right:34px;}
.adv p{flex:1 0 100%; margin:14px 0 18px;}
.adv-img{flex:1 0 100%; width:calc(100% + 44px); margin:auto -22px 0;}

/* --- why 卡片：图标+标题同行（最终版·结构式） --- */
.adv{display:block !important; padding:22px 22px 0 !important; position:relative;}
.adv-head{display:flex; align-items:center; gap:12px; margin:0 0 10px;}
.adv-head .ico{flex:0 0 auto; margin:0; width:42px; height:42px;}
.adv-head h3{flex:1 1 auto; margin:0; padding:0; font-size:18px; line-height:1.35;}
.adv .n{position:absolute; top:30px; right:22px;}
.adv p{margin:0 0 18px !important; font-size:13.5px; line-height:1.72;}
.adv-img{display:block; width:calc(100% + 44px); margin:0 -22px; height:140px; object-fit:cover; border-radius:0; background:#eef3f7;}