:root{
  --teal:#0d9488; --teal-dark:#0b7c72; --teal-light:#ccfbf1;
  --navy:#0f2a43; --ink:#334155; --muted:#64748b;
  --bg:#f6fafb; --card:#ffffff; --line:#e2e8f0;
  --radius:16px; --shadow:0 10px 30px rgba(15,42,67,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.7;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}

/* ===== 顶部导航 ===== */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:1080px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--navy);font-size:18px}
.brand svg{width:30px;height:30px}
.nav-links{display:flex;gap:28px;font-size:15px;color:var(--muted)}
.nav-links a:hover{color:var(--teal)}
.nav-right{display:flex;align-items:center;gap:20px}
.nav-contact{display:flex;align-items:center;gap:18px;font-size:14px;color:var(--muted)}
.contact-item{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.contact-item:hover{color:var(--teal)}
.ci{width:16px;height:16px;stroke:var(--teal);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:640px){.nav-links{display:none}.nav-contact .contact-email{display:none}}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(160deg,#eefdfb 0%,#f6fafb 55%,#eef4fb 100%);
  overflow:hidden;
}
.hero-inner{
  max-width:1080px;margin:0 auto;padding:72px 24px 56px;
  display:grid;grid-template-columns:352fr 632fr;gap:48px;align-items:center;
}
@media(max-width:880px){
  .hero-inner{grid-template-columns:1fr;padding:48px 24px 40px;text-align:center}
  .hero-text{display:flex;flex-direction:column;align-items:center}
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;font-size:13px;color:var(--muted);box-shadow:var(--shadow);
}
.dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.18)}
.dot.warn{background:#f59e0b;box-shadow:0 0 0 3px rgba(245,158,11,.18)}
.hero h1{
  font-size:40px;line-height:1.25;color:var(--navy);
  margin:20px 0 14px;font-weight:800;
}
.hero h1 em{font-style:normal;color:var(--teal)}
.hero p.lead{font-size:17px;color:var(--muted);max-width:44ch}
@media(max-width:640px){.hero h1{font-size:30px}}
.cta{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:12px 26px;border-radius:12px;
  font-size:15px;font-weight:600;transition:.2s;
}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 20px rgba(13,148,136,.3)}
.btn-primary:hover{background:var(--teal-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--navy);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.hero-img{
  border-radius:20px;box-shadow:0 24px 60px rgba(15,42,67,.16);
  border:1px solid rgba(255,255,255,.6);
}

/* ===== 数据条 ===== */
.stats{
  max-width:1080px;margin:-28px auto 0;padding:0 24px;position:relative;z-index:2;
}
.stats-grid{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);
}
@media(max-width:720px){.stats-grid{grid-template-columns:repeat(2,1fr)}}
.stat{padding:22px 16px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
@media(max-width:720px){.stat:nth-child(3){border-left:none}}
.stat b{display:block;font-size:22px;color:var(--navy)}
.stat span{font-size:13px;color:var(--muted)}

/* ===== 通用 section ===== */
section{padding:72px 0}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:28px;color:var(--navy);font-weight:800}
.sec-head p{color:var(--muted);margin-top:8px}
@media(max-width:640px){.sec-head h2{font-size:23px}}

/* ===== 特性卡片 ===== */
.features{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
@media(max-width:880px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid{grid-template-columns:1fr}}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;transition:.25s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#99f6e4}
.icon{
  width:44px;height:44px;border-radius:12px;background:var(--teal-light);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.icon svg{width:22px;height:22px;stroke:var(--teal);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:17px;color:var(--navy);margin-bottom:6px}
.card p{font-size:14px;color:var(--muted)}

/* ===== 产品一览 · 叠放图片墙（横铺满宽，悬停看原图，不裁切）===== */
.product{padding:72px 0 64px}

.gallery{
  display:flex;align-items:stretch;
  justify-content:flex-start;
  width:100%;
}
.gal-item{
  flex:1 1 0;min-width:0;
  border-radius:var(--radius);overflow:hidden;
  background:var(--card);border:1px solid var(--line);
  box-shadow:0 14px 34px rgba(15,42,67,.14);
  transition:transform .3s ease, box-shadow .3s ease;
  position:relative;
}
.gal-item + .gal-item{margin-left:-52px}
.gal-item img{
  width:100%;height:auto;display:block;   /* 不裁切：按原始 3:4 完整显示 */
}
/* 悬停：抬升放大、盖住邻居、加深投影 */
.gal-item:hover{
  transform:translateY(-10px) scale(1.05);
  box-shadow:0 26px 56px rgba(15,42,67,.26);
  z-index:20;
}
.gal-item:hover ~ .gal-item{z-index:1}

@media(max-width:880px){
  .gal-item + .gal-item{margin-left:-34px}
  .product{padding:64px 0 56px}
}

@media(max-width:560px){
  /* 小屏改为两列平铺，取消叠放 */
  .gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
  .gal-item{width:100%}
  .gal-item + .gal-item{margin-left:0}
  .gal-item:hover{transform:none;box-shadow:0 14px 34px rgba(15,42,67,.14)}
  .product{padding:48px 0 40px}
}

/* ===== 服务状态 ===== */
.status-box{
  max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:28px;text-align:center;
}
.status-line{display:flex;align-items:center;justify-content:center;gap:10px;font-size:16px;color:var(--navy);font-weight:600}
.status-sub{font-size:13px;color:var(--muted);margin-top:8px}

footer{
  border-top:1px solid var(--line);background:#fff;
  padding:28px 24px;text-align:center;color:var(--muted);font-size:13px;
}
footer b{color:var(--navy)}
.foot-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px 18px}
.beian{display:inline-flex;align-items:center;gap:6px;color:var(--muted);transition:color .2s}
.beian:hover{color:var(--teal)}
.beian-ico{width:15px;height:15px;stroke:var(--teal);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}