/* ===== 广州众焱电子 静态站样式（红主题，依据 Logo #E80101） ===== */
:root{
  --red:#E80101; --red-dark:#B00000; --red-deep:#7a0010; --ink:#232323;
  --gray:#6b7077; --bg:#f7f5f5; --line:#ecdfdf; --accent:#E80101;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;}
a{color:var(--red-dark);text-decoration:none;}
a:hover{color:var(--red);}
img{max-width:100%;height:auto;display:block;}
.container{max-width:1160px;margin:0 auto;padding:0 20px;}

/* 顶栏 */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(0,0,0,.04);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;}
.logo{display:flex;align-items:center;gap:12px;}
.logo img{height:42px;width:auto;}
.logo .logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo .logo-text b{font-size:19px;color:var(--red);letter-spacing:1px;}
.logo .logo-text span{font-size:12px;color:var(--gray);}
nav.main{display:flex;gap:6px;flex-wrap:wrap;}
nav.main a{padding:8px 12px;border-radius:8px;font-size:15px;color:var(--ink);font-weight:500;}
nav.main a:hover{background:var(--bg);color:var(--red-dark);}
nav.main a.active{background:var(--red);color:#fff;}

/* 汉堡按钮（手机端显示） */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;
  background:none;border:1px solid var(--line);border-radius:8px;cursor:pointer;padding:0;margin-left:10px;}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--red);margin:0 auto;transition:.28s;transform-origin:center;}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 英雄区 */
.hero{position:relative;color:#fff;overflow:hidden;}
.hero img{width:100%;height:420px;object-fit:cover;filter:brightness(.62);}
.hero .hero-text{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;
  padding:0 8%;background:linear-gradient(90deg,rgba(122,0,16,.78),rgba(122,0,16,.12));}
.hero .hero-text h1{font-size:40px;margin:0 0 12px;letter-spacing:2px;}
.hero .hero-text p{font-size:18px;margin:0 0 22px;opacity:.95;}
.btn{display:inline-block;background:var(--red);color:#fff;padding:12px 26px;border-radius:30px;
  font-weight:600;letter-spacing:1px;box-shadow:0 6px 18px rgba(200,0,20,.35);}
.btn:hover{color:#fff;background:var(--red-dark);}

/* 区块 */
section.block{padding:56px 0;}
.section-title{text-align:center;margin-bottom:36px;}
.section-title h2{font-size:30px;color:var(--red);margin:0 0 8px;letter-spacing:2px;}
.section-title .sub{color:var(--gray);font-size:15px;}
.section-title::after{content:"";display:block;width:54px;height:4px;background:var(--red);
  margin:14px auto 0;border-radius:2px;}

/* 卡片网格 */
.grid{display:grid;gap:24px;}
.grid.cols-3{grid-template-columns:repeat(3,1fr);}
.grid.cols-2{grid-template-columns:repeat(2,1fr);}
.grid.cols-4{grid-template-columns:repeat(4,1fr);}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:.25s;display:flex;flex-direction:column;}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(200,0,20,.12);}
.card .ph{height:170px;background:var(--bg);overflow:hidden;}
.card .ph img{width:100%;height:100%;object-fit:cover;}
.card .body{padding:18px 18px 22px;}
.card .body h3{margin:0 0 8px;color:var(--red);font-size:18px;}
.card .body p{margin:0;color:var(--gray);font-size:14px;}

/* ===== 内容页 ===== */
.page-hero{background:linear-gradient(120deg,var(--red),var(--red-dark));color:#fff;padding:54px 0;}
.page-hero h1{margin:0;font-size:34px;letter-spacing:2px;}
.page-hero .crumb{font-size:13px;opacity:.85;margin-bottom:10px;}
.content{max-width:900px;margin:0 auto;padding:48px 20px;}
.content h2{color:var(--red);font-size:24px;margin:34px 0 14px;letter-spacing:1px;
  border-left:5px solid var(--accent);padding-left:12px;}
/* 小标题（原整段 strong / 短引导句） */
.content h3.subhead{color:var(--red);font-size:20px;margin:34px 0 14px;padding-left:14px;
  border-left:5px solid var(--red);letter-spacing:1px;line-height:1.4;}
/* 正文段落：中文首行缩进 */
.content p{margin:0 0 16px;color:#333;text-indent:2em;line-height:1.95;}
/* 首段引言 */
.content p.lead{text-indent:0;font-size:18px;line-height:2;color:var(--red-dark);font-weight:500;margin:0 0 24px;}
/* 图注（图片下方短名） */
.content p.cap{text-indent:0;text-align:center;color:var(--red);font-weight:600;font-size:15px;margin:0 0 18px;}
/* 引用块 */
.content blockquote{margin:22px 0;padding:16px 22px;background:#fff5f5;border-left:4px solid var(--red);
  border-radius:0 10px 10px 0;color:#7a0010;font-size:17px;line-height:1.95;}
/* 工艺步骤有序列表 */
.content ol.steps{counter-reset:step;list-style:none;padding:0;margin:0 0 24px;}
.content ol.steps li{position:relative;padding:14px 18px 14px 58px;background:#fff;
  border:1px solid var(--line);border-left:4px solid var(--red);border-radius:10px;
  margin:0 0 12px;color:#333;line-height:1.85;}
.content ol.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:14px;top:14px;
  width:28px;height:28px;border-radius:50%;background:var(--red);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;}
/* 图片：圆角 + 阴影 */
.content figure{margin:24px 0;box-shadow:0 6px 20px rgba(0,0,0,.08);border-radius:10px;overflow:hidden;}
.content figure img{width:100%;border-radius:10px;border:1px solid var(--line);}

/* 产品网格 */
.products{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.product{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;text-align:center;
  transition:.25s;}
.product:hover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(200,0,20,.12);}
.product img{width:100%;height:180px;object-fit:cover;}
.product .cap{padding:12px;font-weight:600;color:var(--red);font-size:15px;}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;}
.contact-card h3{margin:0 0 14px;color:var(--red);}
.contact-card p{margin:8px 0;font-size:16px;}
.contact-card .big{font-size:22px;color:var(--red);font-weight:700;}

/* 页脚 */
footer.site{background:var(--red-deep);color:#f3d9d9;padding:40px 0 24px;margin-top:40px;}
footer.site .fcols{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;}
footer.site h4{color:#fff;margin:0 0 12px;font-size:16px;}
footer.site p{margin:6px 0;font-size:14px;}
footer.site .copy{text-align:center;margin-top:26px;padding-top:18px;border-top:1px solid #5a000c;
  font-size:13px;color:#d9a9a9;}
footer.site .copy a{color:#ffd9d9;text-decoration:underline;}
footer.site .copy a:hover{color:#fff;}

/* 内容页：优势卡片 / 数字卡片 / 能力标签 */
.content .feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:8px 0 26px;}
.content .feat{background:#fff;border:1px solid var(--line);border-top:3px solid var(--red);
  border-radius:12px;padding:18px 18px 20px;transition:.2s;}
.content .feat:hover{box-shadow:0 10px 24px rgba(200,0,20,.1);}
.content .feat h3{margin:0 0 8px;color:var(--red);font-size:17px;letter-spacing:.5px;}
.content .feat p{margin:0;color:#444;font-size:14px;text-indent:0;line-height:1.8;}
.content .stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:6px 0 26px;}
.content .stat{background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff;
  border-radius:12px;padding:18px 10px;text-align:center;}
.content .stat .num{font-size:26px;font-weight:700;line-height:1.1;}
.content .stat .lab{font-size:13px;opacity:.92;margin-top:6px;}
.content .tags{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0 22px;}
.content .tags span{background:#fff;border:1px solid var(--line);color:var(--red-dark);
  border-radius:20px;padding:6px 14px;font-size:14px;}

/* 响应式 */
@media(max-width:900px){
  .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr);}
  .products{grid-template-columns:repeat(2,1fr);}
  .content .feat-grid{grid-template-columns:repeat(2,1fr);}
  .content .stat-grid{grid-template-columns:repeat(2,1fr);}
  .contact-grid{grid-template-columns:1fr;}
  .hero img{height:300px;}
  .hero .hero-text h1{font-size:28px;}
  .nav-toggle{display:flex;}
  nav.main{display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:0 10px 22px rgba(0,0,0,.08);
    padding:6px 20px 12px;gap:2px;max-height:0;overflow:hidden;transition:max-height .3s ease;align-items:stretch;}
  nav.main.open{max-height:460px;}
  nav.main a{padding:13px 8px;font-size:16px;border-radius:6px;}
  .logo .logo-text b{font-size:16px;}
  .logo img{height:36px;}
}
@media(max-width:560px){
  .grid.cols-2,.grid.cols-3,.grid.cols-4,.products{grid-template-columns:1fr;}
  .content .feat-grid,.content .stat-grid{grid-template-columns:1fr;}
  .content{max-width:100%;}
  footer.site .fcols{flex-direction:column;gap:18px;}
  .hero .hero-text h1{font-size:24px;}
  .page-hero h1{font-size:26px;}
}