/* ==========================================================
   沈阳海普科技有限公司 · 官网样式
   风格：大气工业 · 深色 + 工业橙
   维护：改颜色只改下面 :root 里的变量即可
   ========================================================== */

:root{
  /* 底色系 */
  --bg:        #0c0f14;
  --bg-alt:    #10141b;
  --panel:     #161b23;
  --panel-2:   #1b212b;
  --line:      #242b36;
  --line-2:    #323b49;

  /* 文字 */
  --text:      #e9eef6;
  --text-2:    #aab6c6;
  --text-3:    #7d8a9b;

  /* 主色（工业橙） */
  --accent:    #ff6a1a;
  --accent-d:  #e35a0d;
  --accent-2:  #ffb020;

  --radius:    10px;
  --wrap:      1200px;
  --nav-h:     72px;
  --ease:      cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px;}

/* ---------- 通用标题 ---------- */
.eyebrow{
  display:inline-block;
  font-size:13px;
  letter-spacing:.22em;
  font-weight:700;
  color:var(--accent);
  margin-bottom:14px;
}
.sec-head h2{
  font-size:40px;
  line-height:1.25;
  margin:0 0 14px;
  font-weight:800;
  letter-spacing:-.01em;
}
.sec-sub{
  font-size:17px;
  color:var(--text-2);
  margin:0;
  max-width:720px;
}
.note{font-size:14px;color:var(--text-3);margin-top:22px;}

/* ==========================================================
   顶部导航
   ========================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  background:rgba(12,15,20,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.nav.scrolled{
  background:rgba(12,15,20,.95);
  border-bottom-color:var(--line);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{color:var(--accent);display:flex;align-items:center;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:19px;font-weight:800;letter-spacing:.02em;}
.brand-text em{
  font-style:normal;font-size:10px;letter-spacing:.18em;
  color:var(--text-3);font-weight:600;
}

.menu{display:flex;align-items:center;gap:6px;}
.menu a{
  padding:9px 14px;border-radius:6px;
  font-size:15.5px;color:var(--text-2);
  transition:color .2s,background .2s;
}
.menu a:hover{color:var(--text);background:rgba(255,255,255,.05);}
.menu .nav-cta{
  margin-left:10px;
  background:var(--accent);color:#fff;font-weight:700;
  padding:10px 20px;
}
.menu .nav-cta:hover{background:var(--accent-d);color:#fff;}

.burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;
  background:transparent;border:1px solid var(--line-2);border-radius:8px;
  cursor:pointer;
}
.burger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:.25s;}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ==========================================================
   首屏
   ========================================================== */
.hero{
  position:relative;
  padding:calc(var(--nav-h) + 90px) 0 70px;
  overflow:hidden;
  background:
    radial-gradient(900px 520px at 78% 6%, rgba(255,106,26,.16), transparent 62%),
    radial-gradient(700px 420px at 8% 92%, rgba(60,120,220,.10), transparent 60%),
    linear-gradient(180deg,#0c0f14 0%,#0e1219 100%);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
  pointer-events:none;
}
.hero-inner{position:relative;}
.hero-tag{
  display:inline-block;
  font-size:14px;letter-spacing:.06em;
  color:var(--accent-2);
  border:1px solid rgba(255,106,26,.4);
  background:rgba(255,106,26,.08);
  padding:7px 16px;border-radius:999px;
  margin-bottom:28px;
}
.hero h1{
  font-size:66px;
  line-height:1.12;
  margin:0 0 26px;
  font-weight:900;
  letter-spacing:-.02em;
}
.hero h1 .hl{color:var(--accent);}
.hero-lead{
  font-size:19px;line-height:1.85;
  color:var(--text-2);
  max-width:640px;margin:0 0 36px;
}
.hero-lead strong{color:var(--text);}

/* 首屏·服务行业覆盖行 */
.hero-serve{
  font-size:15px;line-height:1.9;
  color:var(--text-3);
  max-width:900px;
  margin:-18px 0 34px;
  padding-left:16px;
  border-left:3px solid var(--accent);
}

.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:64px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 34px;border-radius:8px;
  font-size:16.5px;font-weight:700;
  transition:transform .2s var(--ease),background .2s,box-shadow .25s;
  cursor:pointer;
}
.btn-primary{
  background:var(--accent);color:#fff;
  box-shadow:0 8px 26px rgba(255,106,26,.28);
}
.btn-primary:hover{background:var(--accent-d);transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,106,26,.36);}
.btn-ghost{
  border:1px solid var(--line-2);color:var(--text);
  background:rgba(255,255,255,.03);
}
.btn-ghost:hover{border-color:var(--text-3);background:rgba(255,255,255,.07);transform:translateY(-2px);}

.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
}
.stat{background:var(--panel);padding:24px 22px;}
.stat b{
  display:block;font-size:27px;font-weight:800;color:var(--text);
  letter-spacing:-.01em;line-height:1.2;
}
.stat b small{font-size:14px;font-weight:600;color:var(--text-3);margin-left:3px;}
.stat span{display:block;font-size:14px;color:var(--text-3);margin-top:7px;}

/* ==========================================================
   通用区块
   ========================================================== */
.sec{padding:100px 0;scroll-margin-top:var(--nav-h);}
.sec.alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec.dark{background:#080b0f;border-top:1px solid var(--line);}
.sec-head{margin-bottom:56px;}

/* ---------- 三卡 ---------- */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.fcard{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;
  transition:border-color .3s var(--ease),transform .3s var(--ease);
}
.fcard:hover{border-color:rgba(255,106,26,.5);transform:translateY(-4px);}
.fico{
  width:62px;height:62px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,106,26,.1);color:var(--accent);
  margin-bottom:22px;
}
.fcard h3{font-size:23px;margin:0 0 12px;font-weight:800;}
.fdesc{font-size:16px;color:var(--text-2);margin:0 0 20px;}
.flist{list-style:none;padding:0;margin:0;border-top:1px solid var(--line);padding-top:18px;}
.flist li{
  position:relative;padding-left:20px;font-size:15.5px;
  color:var(--text-2);margin-bottom:9px;
}
.flist li::before{
  content:"";position:absolute;left:0;top:9px;
  width:7px;height:7px;background:var(--accent);border-radius:2px;
}

/* ---------- 优势六格 ---------- */
.cards3.adv{grid-template-columns:repeat(3,1fr);gap:20px;}
.acard{
  background:linear-gradient(180deg,var(--panel) 0%,var(--panel-2) 100%);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;
  transition:border-color .25s,background .25s;
}
.acard:hover{border-color:var(--line-2);}
.acard h3{
  font-size:19px;margin:0 0 10px;font-weight:800;
  display:flex;align-items:baseline;gap:12px;
}
.acard .num{
  font-size:14px;font-weight:800;color:var(--accent);
  letter-spacing:.06em;flex-shrink:0;
}
.acard p{font-size:15.5px;color:var(--text-2);margin:0;}

/* ---------- 设备参数表 ---------- */
.spec-table{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
}
.srow{
  background:var(--panel);
  padding:20px 24px;
  display:flex;flex-direction:column;gap:6px;
}
.srow dt{font-size:14.5px;color:var(--text-3);}
.srow dd{margin:0;font-size:17.5px;font-weight:700;color:var(--text);letter-spacing:.01em;}

/* ---------- 产品中心 ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px;}
.filters button{
  padding:10px 24px;border-radius:999px;
  background:transparent;border:1px solid var(--line-2);
  color:var(--text-2);font-size:15.5px;font-weight:600;
  cursor:pointer;font-family:inherit;
  transition:.22s var(--ease);
}
.filters button:hover{color:var(--text);border-color:var(--text-3);}
.filters button.on{background:var(--accent);border-color:var(--accent);color:#fff;}

.prod-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.pcard{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .3s var(--ease),transform .3s var(--ease);
}
.pcard:hover{border-color:rgba(255,106,26,.45);transform:translateY(-4px);}
.pimg{
  aspect-ratio:4/3;
  background:
    linear-gradient(135deg,#1d232d 0%,#141920 100%);
  position:relative;
  display:flex;align-items:center;justify-content:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.pimg img{width:100%;height:100%;object-fit:cover;}
.pimg .ph-note{
  text-align:center;color:var(--text-3);font-size:14px;line-height:1.9;
  padding:12px;
}
.pimg .ph-note i{
  font-style:normal;display:block;font-size:26px;color:var(--line-2);margin-bottom:8px;
}
.pimg .ph-note::after{
  content:"";position:absolute;inset:14px;
  border:1px dashed var(--line-2);border-radius:6px;
}
.pcat{
  position:absolute;top:14px;left:14px;z-index:2;
  background:rgba(255,106,26,.92);color:#fff;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  padding:4px 12px;border-radius:4px;
}
.pbody{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.pbody h3{font-size:19.5px;margin:0 0 10px;font-weight:800;}
.pbody p{font-size:15.5px;color:var(--text-2);margin:0 0 16px;flex:1;}
.ptags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.ptags span{
  font-size:13px;color:var(--text-2);
  border:1px solid var(--line-2);border-radius:4px;
  padding:3px 10px;
}
.pspec{
  font-size:14px;color:var(--text-3);
  border-top:1px solid var(--line);padding-top:14px;
}
.prod-hint{font-size:14.5px;color:var(--text-3);margin-top:30px;}

/* ---------- 产品区通栏展示图（合集图） ---------- */
.showcase{
  margin:38px 0 0;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  background:#f7f4ee;
}
.showcase img{
  display:block;width:100%;height:auto;
  max-height:520px;object-fit:cover;
}
.showcase figcaption{
  padding:14px 20px;
  font-size:14.5px;color:var(--text-3);
  border-top:1px solid var(--line);
  background:#fffdf9;
}

/* ---------- 行业应用网格（应用领域区） ---------- */
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.ind-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:12px;
  padding:22px 20px;
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.ind-card:hover{border-color:rgba(255,106,26,.5);transform:translateY(-4px);}
.ind-card .iico{color:var(--accent);margin-bottom:12px;}
.ind-card h3{font-size:19px;margin:0 0 8px;font-weight:800;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.ind-card h3 .flag{
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  color:var(--accent-2);
  border:1px solid rgba(255,176,32,.4);
  border-radius:999px;padding:1px 9px;
}
.ind-card .idesc{font-size:15.5px;color:var(--text-2);margin:0 0 12px;line-height:1.65;}
.ind-card .iparts{
  font-size:14.5px;color:var(--text-3);margin:0;
  border-top:1px dashed var(--line-2);padding-top:12px;line-height:1.65;
}

/* ---------- 典型件标签墙 ---------- */
.tagwall-title{
  font-size:16px;color:var(--text-2);margin:34px 0 0;font-weight:700;
}
.tagwall{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px;}
.tagwall span{
  font-size:14.5px;
  padding:6px 13px;
  border:1px solid var(--line-2);
  border-radius:999px;
  color:var(--text-2);
  background:var(--panel);
}

/* ---------- 服务承诺 ---------- */
.pledge{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.pledge .pl{
  border:1px solid var(--line);
  border-left:4px solid var(--accent);
  border-radius:8px;
  padding:18px 20px;
  background:var(--panel);
}
.pledge .pl h4{font-size:17px;margin:0 0 6px;font-weight:800;}
.pledge .pl p{font-size:15px;color:var(--text-2);margin:0;line-height:1.6;}

/* ---------- 常见问题 ---------- */
.faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:10px;
  padding:20px 22px;
  background:var(--panel);
}
.faq-item h3{font-size:17.5px;margin:0 0 8px;font-weight:800;color:var(--accent-2);}
.faq-item p{margin:0;font-size:15.5px;color:var(--text-2);line-height:1.7;}

/* ---------- 服务流程 ---------- */
.steps{list-style:none;padding:0;margin:0;counter-reset:s;}
.steps li{
  position:relative;
  padding:0 0 40px 84px;
  border-left:2px solid var(--line);
  margin-left:22px;
}
.steps li:last-child{border-left-color:transparent;padding-bottom:0;}
.step-no{
  position:absolute;left:-24px;top:-4px;
  width:48px;height:48px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;letter-spacing:.02em;
}
.steps h4{font-size:20px;margin:6px 0 8px;font-weight:800;}
.steps p{font-size:16px;color:var(--text-2);margin:0;max-width:760px;}

/* ---------- 关于我们 ---------- */
.about-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:60px;align-items:start;}
.about-grid h2{font-size:36px;margin:0 0 20px;font-weight:800;}
.about-grid p{font-size:16.5px;color:var(--text-2);margin:0 0 18px;}
.about-side{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 30px;
}
.about-side h3{font-size:17px;margin:0 0 16px;font-weight:800;color:var(--text);}
.about-side h3:not(:first-child){margin-top:30px;padding-top:26px;border-top:1px solid var(--line);}
.tick{list-style:none;padding:0;margin:0;}
.tick li{position:relative;padding-left:26px;font-size:15.5px;color:var(--text-2);margin-bottom:11px;}
.tick li::before{
  content:"✓";position:absolute;left:0;top:0;
  color:var(--accent);font-weight:800;font-size:14px;
}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:40px;}
.ccard{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;
}
.clabel{
  display:block;font-size:13px;letter-spacing:.14em;color:var(--accent);
  font-weight:700;margin-bottom:12px;
}
.ccard p{margin:0;font-size:16.5px;font-weight:600;word-break:break-all;}
.ph{
  color:var(--accent-2) !important;
  background:rgba(255,176,32,.1);
  border:1px dashed rgba(255,176,32,.42);
  border-radius:6px;padding:10px 12px;
  font-size:15.5px !important;
}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:30px;
  background:linear-gradient(100deg,rgba(255,106,26,.12),rgba(255,106,26,.03));
  border:1px solid rgba(255,106,26,.3);
  border-radius:var(--radius);
  padding:34px 36px;
  flex-wrap:wrap;
}
.cta-band h3{font-size:24px;margin:0 0 8px;font-weight:800;}
.cta-band p{font-size:15.5px;color:var(--text-2);margin:0;max-width:620px;}
.dark-note{margin-top:26px;}

/* ---------- 页脚 ---------- */
.foot{border-top:1px solid var(--line);background:#080b0f;padding:44px 0;}
.foot-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start;}
.foot strong{font-size:17px;font-weight:800;}
.foot p{font-size:14.5px;color:var(--text-3);margin:8px 0 0;}
.ph-line{color:var(--accent-2) !important;}

/* 待填充提示（上线前删掉这些内容即可） */
.todo-inline{
  font-size:14.5px !important;color:var(--accent-2) !important;
  border:1px dashed rgba(255,176,32,.42);border-radius:6px;
  padding:10px 14px;background:rgba(255,176,32,.07);display:inline-block;
}

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width:1080px){
  .prod-grid{grid-template-columns:repeat(2,1fr);}
  .contact-grid{grid-template-columns:repeat(2,1fr);}
  .ind-grid{grid-template-columns:repeat(2,1fr);}
  .pledge{grid-template-columns:repeat(2,1fr);}
  .hero h1{font-size:54px;}
  .sec-head h2{font-size:34px;}
}

@media (max-width:900px){
  .cards3,.cards3.adv{grid-template-columns:1fr;gap:18px;}
  .video-grid{grid-template-columns:1fr;}
  .spec-table{grid-template-columns:1fr;}
  .about-grid{grid-template-columns:1fr;gap:36px;}
  .menu{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#0c0f14;border-bottom:1px solid var(--line);
    padding:10px 20px 22px;
    display:none;
  }
  .menu.open{display:flex;}
  .menu a{padding:14px 6px;border-bottom:1px solid var(--line);border-radius:0;font-size:17px;}
  .menu .nav-cta{margin:16px 0 0;text-align:center;border-radius:8px;}
  .burger{display:flex;}
}

@media (max-width:680px){
  .wrap{padding:0 18px;}
  .sec{padding:66px 0;}
  .hero{padding:calc(var(--nav-h) + 56px) 0 50px;}
  .hero h1{font-size:38px;}
  .hero-lead{font-size:17px;}
  .sec-head h2{font-size:28px;}
  .sec-head{margin-bottom:38px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .stat{padding:18px 16px;}
  .stat b{font-size:23px;}
  .prod-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .ind-grid{grid-template-columns:1fr;gap:16px;}
  .pledge{grid-template-columns:1fr;gap:14px;}
  .faq-list{grid-template-columns:1fr;}
  .showcase figcaption{font-size:15px;}
  .btn{width:100%;}
  .hero-btns{flex-direction:column;}
  .steps li{padding-left:64px;}
  .step-no{width:42px;height:42px;left:-21px;font-size:14px;}
  .cta-band{padding:26px 22px;}
  .brand-text strong{font-size:17px;}
}

/* ---------- 视频展示 ---------- */
.video-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.vcard{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
  transition:border-color .3s var(--ease),transform .3s var(--ease);
}
.vcard:hover{border-color:rgba(255,106,26,.45);transform:translateY(-4px);}
.vcard video{
  width:100%;display:block;
  aspect-ratio:16/9;
  background:#000;
  object-fit:contain;
}
.vcard .vbody{padding:20px 22px 24px;}
.vcard h3{font-size:19px;margin:0 0 8px;font-weight:800;}
.vcard p{font-size:15.5px;color:var(--text-2);margin:0;}

/* ---------- 滚动淡入（由 main.js 自动添加 .reveal / .in） ---------- */
.reveal{opacity:0;transform:translateY(18px);}
.reveal.in{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease);}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;}
}

@media print{
  .nav,.burger,.hero-grid{display:none !important;}
  body{background:#fff;color:#111;}
  .sec,.hero{background:#fff !important;padding:24px 0;}
  .fcard,.acard,.pcard,.ccard,.ind-card,.faq-item,.pl,.vcard,.showcase{background:#fff !important;border-color:#ccc !important;}
  .pcard figcaption,.ind-card .idesc,.ind-card .iparts,.faq-item p,.pl p,.fdesc,.flist li{color:#333 !important;}
  .ind-card h3,.faq-item h3,.pl h4,.pcard h3{color:#111 !important;}
  .showcase figcaption{color:#333 !important;}
}