/* ============================================================
   鬼灰智能 · 官网样式
   深色工业科技风 / 单页长滚动
   ============================================================ */

:root{
  --bg:      #05080C;
  --bg-1:    #080D13;
  --bg-2:    #0B121A;
  --panel:   #0C131B;
  --panel-2: #0F1822;
  --line:    rgba(255,255,255,.075);
  --line-2:  rgba(255,255,255,.14);
  --tx:      #E9F0F7;
  --tx-2:    #97A7B8;
  --tx-3:    #63748A;
  --ac:      #2FE3B8;
  --ac-dim:  #0FA98B;
  --bl:      #5B93FF;
  --radius:  16px;
  --maxw:    1180px;
  --nav-h:   68px;
  --ease:    cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing:border-box; margin:0; padding:0; }

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  background:var(--bg);
  color:var(--tx);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
b{ font-weight:600; }

::selection{ background:rgba(47,227,184,.28); color:#fff; }

/* 滚动条 */
::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-track{ background:var(--bg); }
::-webkit-scrollbar-thumb{ background:#1B2733; border-radius:6px; border:2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover{ background:#26364A; }

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  height:var(--nav-h);
  display:flex; align-items:center;
  background:rgba(5,8,12,.72);
  backdrop-filter:blur(12px) saturate(150%);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s;
}
.nav.scrolled{
  background:rgba(5,8,12,.93);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px -18px rgba(0,0,0,.9);
}
.nav-inner{
  width:100%; max-width:var(--maxw); margin:0 auto; padding:0 28px;
  display:flex; align-items:center; gap:32px;
}

.brand{ display:flex; align-items:center; gap:10px; flex-shrink:0; }
.brand-mark{
  width:34px; height:34px; display:grid; place-items:center;
  border-radius:9px;
  background:linear-gradient(150deg,rgba(47,227,184,.16),rgba(91,147,255,.1));
  border:1px solid rgba(47,227,184,.22);
}
.brand-mark svg{ width:20px; height:20px; }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-text b{ font-size:15px; letter-spacing:.5px; font-weight:600; }
.brand-text i{
  font-size:9px; font-style:normal; letter-spacing:1.4px;
  color:var(--tx-3); margin-top:3px;
}

.nav-links{ display:flex; gap:26px; margin-left:auto; }
.nav-links a{
  font-size:14px; color:var(--tx-2);
  position:relative; padding:6px 0;
  transition:color .22s;
}
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0;
  height:1.5px; background:var(--ac); border-radius:2px;
  transition:right .3s var(--ease);
}
.nav-links a:hover{ color:var(--tx); }
.nav-links a:hover::after,
.nav-links a.active::after{ right:0; }
.nav-links a.active{ color:var(--tx); }

.nav-right{ display:flex; align-items:center; gap:16px; flex-shrink:0; }
.nav-tel{
  display:flex; align-items:center; gap:6px;
  font-size:13.5px; color:var(--tx-2);
  font-variant-numeric:tabular-nums;
  transition:color .22s;
}
.nav-tel:hover{ color:var(--ac); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:44px; padding:0 24px; border-radius:10px;
  font-size:14.5px; font-weight:500; letter-spacing:.3px;
  border:1px solid transparent; cursor:pointer;
  transition:transform .22s var(--ease), box-shadow .28s, background .22s, border-color .22s, color .22s;
  white-space:nowrap;
}
.btn-sm{ height:36px; padding:0 18px; font-size:13.5px; border-radius:8px; }
.btn-primary{
  background:linear-gradient(135deg,var(--ac),#19C9A4);
  color:#04211B; font-weight:600;
  box-shadow:0 6px 22px -8px rgba(47,227,184,.55);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 30px -8px rgba(47,227,184,.65);
}
.btn-ghost{
  border-color:var(--line-2); color:var(--tx);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{
  border-color:rgba(47,227,184,.45);
  background:rgba(47,227,184,.07);
  transform:translateY(-2px);
}
.btn svg{ flex-shrink:0; }

.nav-toggle{
  display:none; width:38px; height:38px; border-radius:8px;
  background:transparent; border:1px solid var(--line-2);
  flex-direction:column; justify-content:center; align-items:center; gap:4px;
  cursor:pointer;
}
.nav-toggle span{
  width:16px; height:1.5px; background:var(--tx); border-radius:2px;
  transition:transform .3s var(--ease), opacity .2s;
}
.nav-toggle.open span:nth-child(1){ transform:translateY(5.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ transform:translateY(-5.5px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;
  padding:calc(var(--nav-h) + 92px) 0 0;
  overflow:hidden;
}
.hero-bg{ position:absolute; inset:0; pointer-events:none; }
.hero-grid{
  position:absolute; inset:-2px;
  background-image:
    linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 75% 60% at 50% 0%, #000 10%, transparent 72%);
  mask-image:radial-gradient(ellipse 75% 60% at 50% 0%, #000 10%, transparent 72%);
}
.hero-glow{
  position:absolute; border-radius:50%; filter:blur(90px);
  will-change:transform;
}
.g1{
  width:640px; height:520px; top:-200px; left:50%; transform:translateX(-52%);
  background:radial-gradient(circle,rgba(47,227,184,.16),transparent 68%);
}
.g2{
  width:520px; height:420px; top:60px; right:-140px;
  background:radial-gradient(circle,rgba(91,147,255,.13),transparent 68%);
}

.hero-inner{ position:relative; text-align:center; }

.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  height:32px; padding:0 16px 0 12px; border-radius:100px;
  background:rgba(255,255,255,.035);
  border:1px solid var(--line-2);
  font-size:12.5px; letter-spacing:.6px; color:var(--tx-2);
}
.eyebrow .dot{
  width:6px; height:6px; border-radius:50%; background:var(--ac);
  box-shadow:0 0 0 3px rgba(47,227,184,.16);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{ box-shadow:0 0 0 3px rgba(47,227,184,.16); }
  50%{ box-shadow:0 0 0 6px rgba(47,227,184,.05); }
}

.hero h1{
  margin-top:28px;
  font-size:clamp(32px,5.2vw,60px);
  line-height:1.24;
  letter-spacing:-.5px;
  font-weight:600;
}
.hero h1 .hl{
  background:linear-gradient(100deg,var(--ac) 10%,#6FB6FF 92%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
}

.hero-sub{
  max-width:730px; margin:26px auto 0;
  font-size:clamp(14.5px,1.5vw,17px);
  line-height:1.85; color:var(--tx-2);
}
.hero-sub b{ color:var(--tx); font-weight:600; }

.hero-actions{
  display:flex; gap:14px; justify-content:center;
  margin-top:38px; flex-wrap:wrap;
}

.hero-stats{
  display:flex; align-items:center; justify-content:center;
  gap:clamp(18px,3vw,46px); flex-wrap:wrap;
  margin-top:52px;
}
.hs{ text-align:center; }
.hs b{
  display:block;
  font-size:clamp(22px,2.6vw,30px);
  font-weight:600; letter-spacing:-.5px;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#fff,#A8BCCF);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hs span{ display:block; font-size:12.5px; color:var(--tx-3); margin-top:2px; letter-spacing:.4px; }
.hs-sep{ width:1px; height:30px; background:var(--line); }

/* Hero 截图 */
.hero-shot{
  position:relative;
  margin-top:64px;
  padding-bottom:80px;
}
.hero-shot .window{
  transform:perspective(1800px) rotateX(4deg);
  transform-origin:50% 0;
}
.hero-shot-glow{
  position:absolute; left:50%; bottom:30px; transform:translateX(-50%);
  width:70%; height:180px; border-radius:50%;
  background:radial-gradient(ellipse,rgba(47,227,184,.15),transparent 70%);
  filter:blur(50px); pointer-events:none; z-index:-1;
}

/* ============================================================
   浏览器窗口框
   ============================================================ */
.window{
  border-radius:12px; overflow:hidden;
  border:1px solid var(--line-2);
  background:var(--panel);
  box-shadow:
    0 2px 0 rgba(255,255,255,.05) inset,
    0 30px 70px -30px rgba(0,0,0,.95),
    0 0 0 1px rgba(0,0,0,.4);
}
.window-bar{
  height:34px; display:flex; align-items:center; gap:6px;
  padding:0 14px;
  background:linear-gradient(180deg,#111A24,#0D151D);
  border-bottom:1px solid var(--line);
}
.window-bar .d{ width:8px; height:8px; border-radius:50%; display:block; }
.d.r{ background:#FF5F57; } .d.y{ background:#FEBC2E; } .d.g{ background:#28C840; }
.window-title{
  margin-left:10px; font-size:11.5px; color:var(--tx-3);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.window-live{
  margin-left:auto; display:flex; align-items:center; gap:5px;
  font-size:10.5px; color:var(--ac);
  padding:2px 8px; border-radius:100px;
  background:rgba(47,227,184,.09);
  border:1px solid rgba(47,227,184,.2);
  flex-shrink:0;
}
.window-live em{
  width:5px; height:5px; border-radius:50%; background:var(--ac);
  animation:pulse 2s infinite;
}
.window img{ width:100%; height:auto; cursor:zoom-in; }

/* ============================================================
   区块通用
   ============================================================ */
.sec{
  position:relative;
  padding:clamp(72px,9vw,124px) 0;
}
.sec-alt{
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg-1) 12%,var(--bg-1) 88%,var(--bg) 100%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.sec[id]{ scroll-margin-top:calc(var(--nav-h) + 8px); }

.sec-head{ max-width:760px; margin-bottom:56px; }
.sec-head h2{
  font-size:clamp(24px,3.2vw,36px);
  line-height:1.3; letter-spacing:-.3px; font-weight:600;
}
.sec-head p{
  margin-top:16px; font-size:15.5px; line-height:1.85; color:var(--tx-2);
}
.sec-head .lead{ font-size:16px; }

.sec-no{
  display:inline-block;
  font-size:12px; font-weight:600; letter-spacing:2px;
  color:var(--ac); margin-bottom:14px;
  font-variant-numeric:tabular-nums;
}
.sec-no::before{
  content:""; display:inline-block; vertical-align:middle;
  width:22px; height:1.5px; background:var(--ac);
  margin-right:10px; margin-bottom:2px;
  opacity:.6;
}

.sec-head-split{
  max-width:none;
  display:grid; grid-template-columns:minmax(0,1fr) auto;
  gap:40px; align-items:end;
}
.sec-head-split > div:first-child{ max-width:700px; }

.sec-badges{ display:flex; gap:10px; }
.badge{
  min-width:92px; padding:14px 16px; border-radius:12px;
  background:rgba(255,255,255,.025);
  border:1px solid var(--line);
  text-align:center;
}
.badge b{
  display:block; font-size:22px; font-weight:600; letter-spacing:-.5px;
  font-variant-numeric:tabular-nums; color:var(--tx);
}
.badge span{ display:block; font-size:11.5px; color:var(--tx-3); margin-top:2px; }

/* ============================================================
   产品卡片
   ============================================================ */
.prod-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:22px;
}
.prod-card{
  position:relative; overflow:hidden;
  padding:32px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 100% at 0% 0%, rgba(47,227,184,.055), transparent 55%),
    linear-gradient(180deg,var(--panel-2),var(--panel));
  transition:transform .38s var(--ease), border-color .3s, box-shadow .38s;
}
.prod-card::after{
  content:""; position:absolute; inset:0; border-radius:inherit;
  background:radial-gradient(90% 70% at 50% -10%, rgba(47,227,184,.14), transparent 60%);
  opacity:0; transition:opacity .4s; pointer-events:none;
}
.prod-card:hover{
  transform:translateY(-5px);
  border-color:rgba(47,227,184,.3);
  box-shadow:0 24px 50px -24px rgba(0,0,0,.9);
}
.prod-card:hover::after{ opacity:1; }

.prod-top{
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:22px;
}
.prod-icon{
  width:46px; height:46px; border-radius:12px;
  display:grid; place-items:center;
  color:var(--ac);
  background:rgba(47,227,184,.1);
  border:1px solid rgba(47,227,184,.22);
}
.prod-icon.blue{
  color:var(--bl);
  background:rgba(91,147,255,.1);
  border-color:rgba(91,147,255,.22);
}
.prod-tag{
  font-size:11.5px; letter-spacing:.6px; padding:4px 11px; border-radius:100px;
  color:var(--ac); background:rgba(47,227,184,.08);
  border:1px solid rgba(47,227,184,.2);
}
.prod-tag.blue{ color:var(--bl); background:rgba(91,147,255,.08); border-color:rgba(91,147,255,.2); }

.prod-card h3{ font-size:21px; font-weight:600; letter-spacing:-.2px; }
.prod-desc{ margin-top:12px; font-size:14.5px; line-height:1.85; color:var(--tx-2); }

.prod-points{ list-style:none; margin-top:20px; display:grid; gap:9px; }
.prod-points li{
  position:relative; padding-left:20px;
  font-size:13.5px; color:var(--tx-2);
}
.prod-points li::before{
  content:""; position:absolute; left:2px; top:9px;
  width:6px; height:6px; border-radius:2px;
  background:var(--ac); opacity:.75;
  transform:rotate(45deg);
}

.prod-foot{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; margin-top:26px; padding-top:20px;
  border-top:1px solid var(--line);
  flex-wrap:wrap;
}
.chips{ display:flex; gap:6px; flex-wrap:wrap; }
.chips span{
  font-size:11.5px; padding:3px 9px; border-radius:6px;
  color:var(--tx-3); background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.link-arrow{
  display:inline-flex; align-items:center; gap:5px;
  font-size:13.5px; color:var(--ac); font-weight:500;
  transition:gap .25s var(--ease);
}
.link-arrow:hover{ gap:9px; }

/* ============================================================
   截图切换区
   ============================================================ */
.shot-block{ margin-bottom:56px; }
.shot-main{ margin-bottom:16px; }
.shot-tabs{
  display:grid; grid-template-columns:repeat(5,1fr); gap:10px;
}
.shot-tabs[data-group="mes"]{ grid-template-columns:repeat(3,1fr); }

.shot-tab{
  position:relative; overflow:hidden; cursor:pointer;
  padding:0; border-radius:9px;
  background:var(--panel); border:1px solid var(--line);
  transition:border-color .25s, transform .25s var(--ease);
  text-align:left;
  font-family:inherit;
}
.shot-tab img{
  width:100%; aspect-ratio:16/9; object-fit:cover; object-position:top left;
  opacity:.5; transition:opacity .3s;
}
.shot-tab span{
  display:block; padding:7px 10px;
  font-size:12px; color:var(--tx-3);
  background:rgba(0,0,0,.35);
  border-top:1px solid var(--line);
  transition:color .25s;
}
.shot-tab:hover{ border-color:var(--line-2); transform:translateY(-2px); }
.shot-tab:hover img{ opacity:.75; }
.shot-tab.active{
  border-color:rgba(47,227,184,.5);
  box-shadow:0 0 0 1px rgba(47,227,184,.2), 0 10px 26px -14px rgba(47,227,184,.4);
}
.shot-tab.active img{ opacity:1; }
.shot-tab.active span{ color:var(--ac); background:rgba(47,227,184,.08); }

/* ============================================================
   功能网格
   ============================================================ */
.feat-grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.feat{
  padding:28px 24px;
  background:var(--bg-1);
  transition:background .3s;
}
.feat:hover{ background:var(--panel-2); }
.feat-i{
  font-size:11px; font-weight:600; letter-spacing:1.4px;
  color:var(--ac); opacity:.55; margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.feat h4{ font-size:15.5px; font-weight:600; letter-spacing:-.1px; }
.feat p{ margin-top:9px; font-size:13px; line-height:1.8; color:var(--tx-2); }

/* ============================================================
   高亮块（AI 问数）
   ============================================================ */
.highlight{
  margin-top:22px;
  display:grid; grid-template-columns:1.15fr .85fr; gap:44px;
  padding:44px;
  border-radius:var(--radius);
  border:1px solid rgba(47,227,184,.18);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(47,227,184,.09), transparent 60%),
    linear-gradient(150deg,#0A1418,#0B1119);
}
.hl-tag{
  display:inline-block; font-size:11.5px; letter-spacing:.8px;
  padding:4px 11px; border-radius:100px;
  color:var(--ac); background:rgba(47,227,184,.1);
  border:1px solid rgba(47,227,184,.24);
  margin-bottom:16px;
}
.hl-left h3{ font-size:22px; font-weight:600; letter-spacing:-.2px; }
.hl-left p{ margin-top:14px; font-size:14px; line-height:1.9; color:var(--tx-2); }
.hl-left p b{ color:var(--tx); }

.hl-right{ display:flex; flex-direction:column; justify-content:center; }
.hl-step{
  display:grid; grid-template-columns:26px 1fr; align-items:center;
  column-gap:12px; row-gap:1px;
}
.hl-step span{
  grid-row:span 2;
  width:26px; height:26px; border-radius:50%;
  display:grid; place-items:center;
  font-size:12px; font-weight:600; color:var(--ac);
  background:rgba(47,227,184,.1);
  border:1px solid rgba(47,227,184,.28);
  font-variant-numeric:tabular-nums;
}
.hl-step b{ font-size:13.5px; font-weight:500; }
.hl-step i{ font-size:11.5px; font-style:normal; color:var(--tx-3); }
.hl-line{ width:1px; height:18px; background:linear-gradient(var(--line-2),transparent); margin-left:13px; }

/* ============================================================
   架构流程图
   ============================================================ */
.flow{
  display:flex; align-items:stretch; gap:0;
  padding:30px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel),var(--bg-2));
}
.flow-col{
  flex:1; min-width:0;
  display:flex; flex-direction:column; gap:8px;
}
.flow-layer{
  font-size:11px; letter-spacing:1px; color:var(--tx-3);
  text-align:center; margin-bottom:6px; text-transform:uppercase;
}
.flow-node{
  padding:11px 12px; border-radius:8px;
  font-size:12px; text-align:center; color:var(--tx-2);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  line-height:1.5;
  transition:border-color .25s, color .25s, background .25s;
}
.flow-node:hover{ border-color:var(--line-2); color:var(--tx); }
.flow-node.accent{
  color:var(--ac);
  background:rgba(47,227,184,.07);
  border-color:rgba(47,227,184,.24);
  font-weight:500;
}
.flow-arrow{
  flex:0 0 40px;
  display:flex; align-items:center; justify-content:center;
  color:var(--tx-3); opacity:.55;
  padding-top:24px;
}
.flow-arrow svg{ width:26px; height:16px; }

/* ============================================================
   对比表
   ============================================================ */
.cmp-wrap{
  margin-top:22px; border-radius:var(--radius);
  border:1px solid var(--line); overflow:hidden;
  background:var(--panel);
  overflow-x:auto;
}
.cmp{
  width:100%; border-collapse:collapse; min-width:620px;
  font-size:13.5px;
}
.cmp th, .cmp td{
  padding:15px 22px; text-align:left;
  border-bottom:1px solid var(--line);
}
.cmp thead th{
  font-size:12px; font-weight:600; letter-spacing:.6px;
  color:var(--tx-3); background:rgba(255,255,255,.025);
  padding-top:17px; padding-bottom:17px;
}
.cmp thead th:nth-child(2){ color:var(--ac); }
.cmp thead th:nth-child(3){ color:var(--bl); }
.cmp tbody td{ color:var(--tx-2); }
.cmp tbody tr:last-child td{ border-bottom:none; }
.cmp tbody tr:hover td{ background:rgba(255,255,255,.018); }
.cmp .cmp-dim{ color:var(--tx-3); font-size:12.5px; width:22%; }

/* ============================================================
   交付 / 部署
   ============================================================ */
.dep-grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:18px;
}
.dep-card{
  padding:28px 26px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
}
.dep-card h4{
  font-size:15px; font-weight:600; margin-bottom:18px;
  padding-bottom:14px; border-bottom:1px solid var(--line);
}
.dep-list{ list-style:none; display:grid; gap:13px; }
.dep-list li{ display:flex; flex-direction:column; gap:2px; }
.dep-list b{ font-size:13px; font-weight:500; color:var(--tx); }
.dep-list span{ font-size:12.5px; color:var(--tx-3); line-height:1.6; }

.metric-row{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  margin-top:22px; border-radius:var(--radius); overflow:hidden;
  border:1px solid var(--line); background:var(--line);
}
.metric{
  padding:28px 24px; background:var(--bg-1); text-align:center;
}
.metric b{
  display:block; font-size:30px; font-weight:600; letter-spacing:-1px;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#fff,#8FA6BA);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
}
.metric b span{ font-size:16px; }
.metric i{ display:block; font-size:12px; font-style:normal; color:var(--tx-3); margin-top:4px; }

/* ============================================================
   行业
   ============================================================ */
.ind-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.ind{
  padding:26px 24px; border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.018);
  transition:border-color .3s, background .3s, transform .3s var(--ease);
}
.ind:hover{
  border-color:rgba(47,227,184,.25);
  background:rgba(47,227,184,.035);
  transform:translateY(-3px);
}
.ind h4{ font-size:15px; font-weight:600; }
.ind p{ margin-top:8px; font-size:13px; line-height:1.8; color:var(--tx-2); }

/* ============================================================
   关于
   ============================================================ */
.about-wrap{
  display:grid; grid-template-columns:1.2fr .8fr; gap:56px; align-items:start;
}
.about-text h2{ font-size:clamp(24px,3vw,32px); font-weight:600; letter-spacing:-.3px; }
.about-text p{
  margin-top:18px; font-size:15px; line-height:1.95; color:var(--tx-2);
}
.about-text p b{ color:var(--tx); }

.about-cards{ display:grid; gap:12px; padding-top:64px; }
.ac{
  padding:22px 24px; border-radius:12px;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,227,184,.045),transparent 70%);
}
.ac b{ display:block; font-size:14.5px; font-weight:600; margin-bottom:5px; }
.ac span{ font-size:12.5px; color:var(--tx-3); line-height:1.7; }

/* ============================================================
   联系
   ============================================================ */
.sec-contact{
  background:
    radial-gradient(70% 90% at 15% 0%, rgba(47,227,184,.075), transparent 60%),
    linear-gradient(180deg,var(--bg),var(--bg-1));
  border-top:1px solid var(--line);
}
.contact-wrap{
  display:grid; grid-template-columns:1fr 1.05fr; gap:60px; align-items:start;
}
.contact-left h2{ font-size:clamp(26px,3.2vw,36px); font-weight:600; letter-spacing:-.4px; }
.contact-left p{ margin-top:16px; font-size:15px; line-height:1.9; color:var(--tx-2); max-width:420px; }

.contact-info{ margin-top:34px; display:grid; gap:14px; }
.contact-info a, .contact-info > div{
  display:flex; align-items:center; gap:16px;
  font-size:14px;
}
.contact-info span{ color:var(--tx-3); font-size:12.5px; width:52px; flex-shrink:0; }
.contact-info b{ font-weight:500; color:var(--tx); font-variant-numeric:tabular-nums; }
.contact-info a:hover b{ color:var(--ac); }
/* 微信号：点一下复制（app.js 的 initCopy），选中时整串一起选，别让人只选到一半 */
.contact-info b.copyable{ cursor:pointer; user-select:all; transition:color .22s; }
.contact-info b.copyable:hover{ color:var(--ac); }
.contact-info b.copyable.copied{ color:var(--ac); }

.contact-form{
  padding:32px; border-radius:var(--radius);
  border:1px solid var(--line-2);
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  box-shadow:0 30px 60px -30px rgba(0,0,0,.85);
}
.cf-row{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.contact-form label{
  display:block; margin-bottom:14px;
  font-size:12px; color:var(--tx-3); letter-spacing:.4px;
}
.contact-form input, .contact-form textarea{
  display:block; width:100%; margin-top:7px;
  padding:11px 13px; border-radius:9px;
  background:rgba(0,0,0,.35);
  border:1px solid var(--line-2);
  color:var(--tx); font-size:14px; font-family:inherit;
  transition:border-color .22s, box-shadow .22s, background .22s;
  resize:vertical;
}
.contact-form input::placeholder, .contact-form textarea::placeholder{ color:#4E5F72; }
.contact-form input:focus, .contact-form textarea:focus{
  outline:none;
  border-color:rgba(47,227,184,.55);
  background:rgba(0,0,0,.5);
  box-shadow:0 0 0 3px rgba(47,227,184,.09);
}
.contact-form input.err, .contact-form textarea.err{
  border-color:rgba(255,95,87,.6);
  box-shadow:0 0 0 3px rgba(255,95,87,.08);
}
.cf-foot{ display:flex; align-items:center; gap:16px; margin-top:8px; flex-wrap:wrap; }
.cf-tip{ font-size:12px; color:var(--tx-3); }
.cf-tip.ok{ color:var(--ac); }
.cf-tip.bad{ color:#FF6B63; }

/* ============================================================
   页脚
   ============================================================ */
.foot{
  border-top:1px solid var(--line);
  background:var(--bg);
  padding:56px 0 26px;
}
.foot-inner{
  display:grid; grid-template-columns:1.1fr 1.4fr; gap:48px;
  padding-bottom:44px;
}
.foot-brand p{ margin-top:18px; font-size:12.5px; line-height:1.9; color:var(--tx-3); }
.foot-links{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.foot-links div{ display:flex; flex-direction:column; gap:11px; }
.foot-links b{ font-size:12.5px; color:var(--tx-2); font-weight:600; letter-spacing:.5px; margin-bottom:2px; }
.foot-links a{ font-size:12.5px; color:var(--tx-3); transition:color .22s; }
.foot-links a:hover{ color:var(--ac); }
/* 微信不是链接（点不了），但视觉上要跟旁边的链接对齐 */
.foot-links .foot-wx{ font-size:12.5px; color:var(--tx-3); }
/* 友情链接单独一行，不去挤上面那三栏 */
.foot-friends{
  display:flex; align-items:center; gap:20px; flex-wrap:wrap;
  padding-bottom:24px; font-size:12.5px;
}
.foot-friends b{ color:var(--tx-2); font-weight:600; letter-spacing:.5px; }
.foot-friends a{ color:var(--tx-3); transition:color .22s; }
.foot-friends a:hover{ color:var(--ac); }
.foot-bottom{
  display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap;
  padding-top:24px; border-top:1px solid var(--line);
  font-size:12px; color:var(--tx-3);
}

/* ============================================================
   灯箱
   ============================================================ */
.lightbox{
  position:fixed; inset:0; z-index:200;
  display:flex; align-items:center; justify-content:center;
  padding:40px;
  background:rgba(3,6,9,.94);
  backdrop-filter:blur(6px);
  opacity:0; visibility:hidden;
  transition:opacity .28s, visibility .28s;
}
.lightbox.open{ opacity:1; visibility:visible; }
.lightbox img{
  max-width:100%; max-height:100%;
  border-radius:10px; border:1px solid var(--line-2);
  box-shadow:0 40px 90px -30px #000;
  transform:scale(.97); transition:transform .32s var(--ease);
}
.lightbox.open img{ transform:scale(1); }
.lb-close{
  position:absolute; top:24px; right:28px;
  width:40px; height:40px; border-radius:50%;
  background:rgba(255,255,255,.06); border:1px solid var(--line-2);
  color:var(--tx); font-size:22px; line-height:1; cursor:pointer;
  transition:background .22s, transform .22s;
}
.lb-close:hover{ background:rgba(255,255,255,.12); transform:rotate(90deg); }

/* ============================================================
   入场动画
   ============================================================ */
.reveal{
  opacity:0; transform:translateY(22px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in{ opacity:1; transform:none; }

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition-duration:.01ms !important; }
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .nav-links{ display:none; }
  .nav-toggle{ display:flex; }
  .nav-right{ margin-left:auto; }
  .nav-links.open{
    display:flex; flex-direction:column; gap:0;
    position:absolute; top:var(--nav-h); left:0; right:0;
    background:rgba(6,10,15,.98);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    padding:8px 28px 20px;
  }
  .nav-links.open a{ padding:13px 0; font-size:15px; border-bottom:1px solid var(--line); }
  .nav-links.open a::after{ display:none; }

  .feat-grid{ grid-template-columns:repeat(2,1fr); }
  .dep-grid{ grid-template-columns:1fr 1fr; }
  .ind-grid{ grid-template-columns:1fr 1fr; }
  .highlight{ grid-template-columns:1fr; gap:32px; padding:34px; }
  .about-wrap{ grid-template-columns:1fr; gap:36px; }
  .about-cards{ padding-top:0; }
  .contact-wrap{ grid-template-columns:1fr; gap:40px; }
  .sec-head-split{ grid-template-columns:1fr; gap:26px; }
  .sec-badges{ justify-content:flex-start; }
  .foot-inner{ grid-template-columns:1fr; gap:36px; }

  .flow{ flex-direction:column; gap:0; padding:24px; }
  .flow-arrow{ flex:0 0 34px; padding:0; transform:rotate(90deg); }
  .flow-node{ font-size:12.5px; }
}

@media (max-width:760px){
  .wrap{ padding:0 20px; }
  .nav-inner{ padding:0 20px; gap:16px; }
  .nav-tel{ display:none; }

  .hero{ padding-top:calc(var(--nav-h) + 60px); }
  .hero h1{ font-size:clamp(25px,7.2vw,34px); }
  .hero-stats{
    display:grid; grid-template-columns:1fr 1fr;
    gap:22px 8px; margin-top:44px;
  }
  .hs-sep{ display:none; }
  .hs b{ font-size:24px; }
  .hero-shot{ margin-top:44px; padding-bottom:50px; }
  .hero-shot .window{ transform:none; }

  .prod-grid{ grid-template-columns:1fr; }
  .prod-card{ padding:26px 22px; }
  .feat-grid{ grid-template-columns:1fr; }
  .feat{ padding:24px 22px; }

  .shot-tabs, .shot-tabs[data-group="mes"]{ grid-template-columns:repeat(2,1fr); }

  .dep-grid{ grid-template-columns:1fr; }
  .ind-grid{ grid-template-columns:1fr; }
  .metric-row{ grid-template-columns:1fr 1fr; }
  .metric{ padding:22px 14px; }
  .metric b{ font-size:24px; }

  .contact-form{ padding:24px 20px; }
  .cf-row{ grid-template-columns:1fr; gap:0; }

  .foot-links{ grid-template-columns:1fr 1fr; }
  .foot-bottom{ flex-direction:column; gap:8px; }

  .sec-badges{ flex-wrap:wrap; }
  .badge{ flex:1; min-width:0; padding:12px 10px; }
  .badge b{ font-size:19px; }

  .highlight{ padding:26px 22px; }
  .cmp th, .cmp td{ padding:13px 16px; }
}