/* ===== 过程工业解决方案 · 公共样式 ===== */
:root{
  --blue:#1f6fd6;
  --blue-d:#0d4ea3;
  --blue-l:#3f9bff;
  --ink:#23415e;
  --ink-soft:#3c5a78;
  --panel:rgba(255,255,255,.78);
  --panel-line:rgba(63,155,255,.35);
  --label:#1565c0;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;
  color:var(--ink);
  background:#dfeefb;
  -webkit-font-smoothing:antialiased;
}

/* ---------- 首页 ---------- */
.home-stage{
  position:relative;
  width:100%;
  max-width:1920px;
  margin:0 auto;
  aspect-ratio:1920/1080;
  background:#cfe6fb url("../assets/home.png") center/contain no-repeat;
  overflow:hidden;
}
.hotspot{
  position:absolute;
  transform:translate(-50%,-50%);
  width:14%;height:6%;
  border-radius:10px;
  cursor:pointer;
  text-indent:-9999px;          /* 文案已烤在底图里，热区本身透明 */
  border:2px solid transparent;
  transition:.18s;
}
.hotspot:hover,.hotspot:focus{
  background:rgba(63,155,255,.22);
  border-color:rgba(63,155,255,.9);
  box-shadow:0 0 18px rgba(63,155,255,.55);
  outline:none;
}
.home-hint{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
  font-size:13px;color:#5b7da0;background:rgba(255,255,255,.6);
  padding:4px 14px;border-radius:20px;backdrop-filter:blur(4px);
}
/* 调试：地址栏加 #edit 可让所有热区可见，方便微调坐标 */
.show-hotspots .hotspot{background:rgba(255,40,40,.25);border-color:#ff2020;text-indent:0;color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.1;text-shadow:0 1px 2px #000}

/* ---------- 详情页 ---------- */
.detail-body{
  min-height:100vh;
  background:linear-gradient(rgba(231,243,255,.86),rgba(231,243,255,.92)),
             url("../assets/iso-bg.png") center/cover fixed;
}
.detail-wrap{max-width:1320px;margin:0 auto;padding:26px 28px 90px}

.title-bar{text-align:center;margin:6px 0 26px}
.title-bar h1{
  display:inline-block;
  font-size:26px;letter-spacing:2px;color:#fff;font-weight:700;
  padding:12px 54px;border-radius:30px;
  background:linear-gradient(180deg,var(--blue-l),var(--blue-d));
  box-shadow:0 6px 16px rgba(13,78,163,.35);
}
.industry-tag{
  display:inline-block;margin-left:14px;vertical-align:middle;
  font-size:13px;color:var(--blue-d);background:#fff;
  border:1px solid var(--panel-line);border-radius:14px;padding:3px 12px;
}

.cols{display:grid;grid-template-columns:42% 58%;gap:22px;align-items:start}

.card{
  background:var(--panel);
  border:1px solid var(--panel-line);
  border-radius:14px;
  padding:14px 18px 16px;
  margin-bottom:18px;
  backdrop-filter:blur(3px);
  box-shadow:0 4px 14px rgba(31,111,214,.08);
}
.card:last-child{margin-bottom:0}
.sec-head{
  display:inline-block;color:#fff;font-size:16px;font-weight:700;
  padding:6px 22px;border-radius:6px 16px 6px 16px;margin-bottom:12px;
  background:linear-gradient(180deg,var(--blue-l),var(--blue));
}
.intro{font-size:15px;line-height:1.85;color:var(--ink-soft);text-align:justify}

.points{list-style:none}
.points li{
  position:relative;padding-left:16px;margin-bottom:10px;
  font-size:14.5px;line-height:1.8;color:var(--ink-soft);text-align:justify;
}
.points li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:50%;
  background:var(--blue-l);box-shadow:0 0 0 3px rgba(63,155,255,.18);
}
.points b{color:var(--label);font-weight:700}

.diagram{
  width:100%;border-radius:10px;display:block;
  border:1px solid rgba(63,155,255,.25);background:#fff;
}
.appcase p{font-size:14.5px;line-height:1.8;color:var(--ink-soft)}

/* 返回首页按钮 */
.home-btn{
  position:fixed;right:30px;bottom:28px;
  width:60px;height:60px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg,var(--blue-l),var(--blue-d));
  box-shadow:0 6px 18px rgba(13,78,163,.45);
  cursor:pointer;transition:.18s;z-index:20;
}
.home-btn:hover{transform:translateY(-3px) scale(1.05)}
.home-btn svg{width:30px;height:30px;fill:#fff}

/* 上一项 / 下一项 翻页 */
.nav-arrows{position:fixed;left:30px;bottom:28px;display:flex;gap:10px;z-index:20}
.nav-arrows a{
  display:flex;align-items:center;gap:6px;
  font-size:13px;color:var(--blue-d);text-decoration:none;
  background:rgba(255,255,255,.85);border:1px solid var(--panel-line);
  padding:9px 14px;border-radius:22px;transition:.18s;
}
.nav-arrows a:hover{background:#fff;box-shadow:0 4px 12px rgba(31,111,214,.2)}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .cols{grid-template-columns:1fr}
  .title-bar h1{font-size:21px;padding:10px 28px}
  .industry-tag{display:block;margin:10px auto 0;width:max-content}
  .home-btn{width:52px;height:52px;right:18px;bottom:18px}
  .nav-arrows{left:18px;bottom:18px}
}