/* CHUYU TouchPlanet · shared Apple-style design system */
:root{
  --bg:#ffffff; --gray:#f5f5f7; --gray2:#fbfbfd; --ink:#1d1d1f; --mut:#6e6e73; --dim:#86868b; --line:#d2d2d7;
  --accent:#0a84ff; --accentDk:#0070e0; --cyan:#0098b3;
  --r:4px; --rl:6px;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
.mono{font-family:var(--mono);letter-spacing:0}
.wrap{max-width:1040px;margin:0 auto;padding:0 32px}
.wide{max-width:1280px;margin:0 auto;padding:0 32px}

/* chevron link */
[data-livechat]{cursor:pointer}
.cl{color:var(--accent);font-size:17px;display:inline-flex;align-items:center;gap:3px;transition:.15s;white-space:nowrap;flex-shrink:0}
.cl::after{content:"›";font-size:19px}
.cl:hover{text-decoration:underline}
.cl.sm{font-size:15px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:7px;font-family:inherit;font-size:15px;font-weight:500;padding:11px 22px;border-radius:6px;cursor:pointer;border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accentDk)}
.btn.ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn.ghost:hover{border-color:var(--ink)}

/* nav */
header{position:sticky;top:0;z-index:50;background:rgba(234,234,239,.86);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.07)}
nav.bar{display:flex;align-items:center;justify-content:space-between;height:50px;max-width:1280px;margin:0 auto;padding:0 32px}
.brand{display:flex;align-items:center;gap:9px}
.logoimg{height:26px;width:auto;display:block}
.brand b{font-weight:600;font-size:15px;letter-spacing:0}
.brand .cn{font-size:10px;color:var(--mut);letter-spacing:.16em;display:block;margin-top:-3px}
.links{display:flex;gap:34px;align-items:center}
.links a{font-size:13px;color:#1d1d1fcc;transition:.2s}
.links a:hover,.links a.on{color:var(--ink)}
.links a.on{font-weight:600}
/* 标题栏导航文字 — 与 cnsszn.com 标题栏一致：16px / 中等字重(500) / #404040 / 思源黑体栈，悬停品牌色 + 从中间展开的下划线 */
.bar .links{gap:30px;align-items:stretch;height:50px}
.bar .links a{position:relative;display:flex;align-items:center;font-family:'SourceHanSansCN','PingFang SC','Microsoft YaHei','Microsoft YaHei UI','SimSun','SimHei','Arial';font-size:16px;font-weight:500;color:#404040;transition:color .3s}
.bar .links a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--accent);transition:.3s}
.bar .links a:hover,.bar .links a.on{color:var(--accent)}
.bar .links a.on{font-weight:500}
.bar .links a:hover::after,.bar .links a.on::after{left:0;width:100%}
/* 标题栏二级菜单（工业传感器 / 触控方案 …）— cnsszn 式：鼠标悬停顶级项，二级条目以全宽横条在主导航条下方展开（纯 CSS hover，无需 JS） */
.navitem{display:flex;align-items:stretch;height:50px;position:relative}
.navitem>a .caret{margin-left:5px;width:10px;height:10px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;opacity:.55;transition:transform .25s,opacity .25s}
.navitem:hover>a .caret{transform:rotate(180deg);opacity:1}
.navitem:hover>a{color:var(--accent)}
.navitem:hover>a::after{left:0;width:100%}
/* 二级横条：定位相对 sticky 的 header → 全宽；悬停展开 */
.dropdown{position:absolute;top:100%;left:0;right:auto;display:flex;justify-content:flex-start;align-items:center;flex-wrap:nowrap;gap:0;padding:11px 0;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s,transform .2s,visibility .2s;z-index:45}/* 相对其一级菜单项定位:内容左缘对齐该菜单项左缘;大类横向平铺不换行 */
.bar .links .dropdown::before{content:"";position:absolute;top:0;bottom:0;left:-100vw;right:-100vw;background:rgba(234,234,239,.97);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08);box-shadow:0 16px 26px -18px rgba(0,0,0,.18);z-index:-1}/* 背景横条延展为全宽(视口宽) */
.navitem:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.bar .links .dropdown a{position:relative;display:inline-flex;align-items:center;height:auto;font-size:14px;font-weight:500;color:var(--ink);padding:5px 22px;white-space:nowrap;transition:color .15s}
.bar .links .dropdown a::after{content:none}
.bar .links .dropdown a:first-child{padding-left:0}/* 关于我们:移除链接间竖线;首项「公司介绍」文字左缘对齐一级菜单项左缘 */
.bar .links .dropdown a:hover{color:var(--accent)}
.bar .links .dropdown a small{display:none}
/* 工业传感器 = cnsszn 式三级父子菜单：全宽面板内分栏，每栏 = 分类标题(.megahd) + 其系列/型号 */
.dropdown.mega{align-items:stretch;gap:50px;padding:20px 0 22px}
.dropdown.mega .megacol{display:flex;flex-direction:column;gap:2px;min-width:148px}
.bar .links .dropdown.mega a{display:block;width:100%;padding:5px 0;font-size:13.5px;font-weight:400;color:var(--ink);white-space:nowrap}/* 二级菜单选项文字统一为黑色 */
.bar .links .dropdown.mega a.megahd{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;padding-bottom:7px;border-bottom:1px solid var(--line)}
.bar .links .dropdown.mega a:hover{color:var(--accent)}
.bar .links .dropdown.mega a + a::before{content:none}
.dropdown.mega .megasub{display:block;font-size:12px;color:var(--dim);padding:5px 0}
.dropdown.mega .megagrid{display:grid;grid-auto-flow:column;grid-template-rows:repeat(3,auto);column-gap:30px}
.bar .links .dropdown.mega .megagrid a{width:auto}
.navcta{display:flex;gap:14px;align-items:center}
.langbtn{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#1d1d1fcc;cursor:pointer;background:none;border:none;font-family:inherit;line-height:1}
.langbtn:hover{color:var(--accent)}
.langbtn .flag{width:19px;height:13px;flex:0 0 auto;border-radius:2px;box-shadow:0 0 0 .5px rgba(0,0,0,.12);display:inline-block;vertical-align:middle}
.navbuy{font-size:13px;background:var(--accent);color:#fff;padding:5px 14px;border-radius:6px;transition:.2s}
.navbuy:hover{background:var(--accentDk)}

/* breadcrumb */
.bc{max-width:1280px;margin:0 auto;padding:18px 32px 0;font-size:13px;color:var(--mut);display:flex;gap:8px;align-items:center}
.bc a:hover{color:var(--accent)}
.bc .sep{color:var(--line)}
.bc .cur{color:var(--ink)}

/* page hero */
.phero{text-align:center;padding:56px 0 36px}
.phero .kick{font-size:16px;color:var(--accent);font-weight:500;margin-bottom:8px}
.phero h1{font-size:56px;line-height:1.06;font-weight:600;letter-spacing:-.03em}
.phero p{font-size:21px;color:var(--mut);max-width:34ch;margin:16px auto 0;font-weight:400}

/* band */
.band{padding:80px 0}
.band.gray{background:var(--gray)}
.bandhead{text-align:center;margin-bottom:44px}
.bandhead .tag{font-size:16px;color:var(--accent);font-weight:500;margin-bottom:8px}
.bandhead h2{font-size:44px;font-weight:600;letter-spacing:-.025em}
.bandhead p{font-size:19px;color:var(--mut);max-width:46ch;margin:14px auto 0}

/* product tile */
.tiles{display:grid;gap:20px}
.tiles.t3{grid-template-columns:repeat(3,1fr)}
.tiles.t2{grid-template-columns:repeat(2,1fr)}
.tile{background:#fff;border-radius:var(--rl);overflow:hidden;display:flex;flex-direction:column;text-align:center;transition:.3s;box-shadow:0 4px 20px -12px rgba(0,0,0,.18);border:1px solid rgba(0,0,0,.04)}
.tile:hover{transform:translateY(-4px);box-shadow:0 24px 50px -28px rgba(0,0,0,.28)}
.tile .top{padding:38px 30px 24px}
.tile .ptag{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.08em;margin-bottom:10px}
.tile h3{font-size:24px;font-weight:600;letter-spacing:-.02em;margin-bottom:10px}
.tile p{font-size:15px;color:var(--mut);max-width:32ch;margin:0 auto 14px}
.tile .specmini{display:inline-flex;gap:20px;font-family:var(--mono);font-size:12px;color:var(--ink);margin-bottom:16px}
.tile .specmini .lab{color:var(--dim);font-size:9px;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:2px}
.tile .links{display:flex;gap:22px;justify-content:center}
.tile .pic{margin-top:auto;height:210px;background:radial-gradient(120% 100% at 50% 0%,#eef1f5,#f5f5f7);position:relative;display:grid;place-items:center;border-top:1px solid rgba(0,0,0,.04)}
.tile .pic .cap{font-family:var(--mono);font-size:10px;color:#a1a1a6;letter-spacing:.1em;z-index:1}
.tiles.t2 .tile .pic{height:280px}

/* real product imagery inside .pic */
.pic img.ph{max-width:72%;max-height:76%;object-fit:contain;z-index:1;filter:drop-shadow(0 14px 22px rgba(20,30,45,.18))}
.pic img.ph.chip{max-height:66%}

/* footer */
footer{background:var(--gray);padding:44px 0 30px;font-size:12px;color:var(--mut)}
.fnote{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:22px;line-height:1.7;color:var(--dim)}
.fgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.fgrid h4{font-size:12px;font-weight:600;color:var(--ink);margin-bottom:12px}
.fgrid a{display:block;color:var(--mut);padding:5px 0;transition:.15s}
.fgrid a:hover{color:var(--ink);text-decoration:underline}
.fbot{display:flex;justify-content:space-between;align-items:center;margin-top:22px;flex-wrap:wrap;gap:10px;color:var(--dim)}
.fbot a:hover{text-decoration:underline}

/* footer (cnsszn-style): brand + company contact on the left, link columns on the right */
.ftop{display:grid;grid-template-columns:1.25fr 2fr;gap:48px;padding-bottom:30px;border-bottom:1px solid var(--line)}
.fbrand .flogo{display:flex;align-items:center;gap:9px;margin-bottom:14px}
.fbrand .flogo img{height:24px;width:auto}
.fbrand .flogo b{font-size:16px;color:var(--ink);font-weight:600;letter-spacing:0}
.ftag{font-size:13px;line-height:1.7;color:var(--dim);margin-bottom:18px;max-width:36ch}
.fcontact{display:flex;flex-direction:column;gap:11px}
.fcontact a,.fcontact>div{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--mut);transition:.15s}
.fcontact a:hover{color:var(--accent)}
.fcontact svg{width:15px;height:15px;color:var(--accent);flex-shrink:0}
.fcols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.fcols h4{font-size:12px;font-weight:600;color:var(--ink);margin-bottom:12px}
.fcols a{display:block;color:var(--mut);padding:5px 0;font-size:13px;transition:.15s}
.fcols a:hover{color:var(--ink);text-decoration:underline}
@media(max-width:900px){.ftop{grid-template-columns:1fr;gap:30px}.fcols{grid-template-columns:1fr 1fr}}

/* live chat */
.chat{position:fixed;right:22px;bottom:22px;z-index:80;display:flex;align-items:center;gap:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:500;padding:12px 18px;border-radius:30px;cursor:pointer;box-shadow:0 12px 30px -10px rgba(0,0,0,.5);transition:.2s}
.chat:hover{transform:translateY(-2px)}
.chat .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

@media(max-width:900px){
  .phero h1{font-size:38px}.phero p{font-size:18px}
  .bandhead h2{font-size:32px}
  .tiles.t3,.tiles.t2{grid-template-columns:1fr}
  .links{display:none}
  .fgrid{grid-template-columns:1fr 1fr}
}

/* ===== 在线客服 实时对话面板 live-chat panel ===== */
.lc-has-unread{position:relative}
.lc-has-unread::after{content:"";position:absolute;top:-3px;right:-3px;width:11px;height:11px;border-radius:50%;background:#ff3b30;border:2px solid #fff}
.lc-panel{position:fixed;right:22px;bottom:22px;z-index:210;width:360px;max-width:calc(100vw - 32px);height:520px;max-height:calc(100vh - 120px);display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 24px 60px -16px rgba(0,0,0,.4);animation:lcUp .2s cubic-bezier(.2,.8,.2,1)}
.lc-panel[hidden]{display:none}
/* 左上角拖拽手柄：面板锚定右下角，往左上方拖大，符合锚点直觉；自定义实现（非原生 resize），跨浏览器一致 */
.lc-resize{position:absolute;top:0;left:0;width:18px;height:18px;z-index:1;cursor:nwse-resize;touch-action:none}
.lc-resize::before{content:"";position:absolute;top:6px;left:6px;width:7px;height:7px;border-top:2px solid #ffffff66;border-left:2px solid #ffffff66;border-radius:2px 0 0 0;transition:.15s}
.lc-resize:hover::before{border-color:#fff}
@media(max-width:480px){.lc-resize{display:none}}
@keyframes lcUp{from{transform:translateY(14px);opacity:0}to{transform:translateY(0);opacity:1}}
.lc-bar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 14px 13px 16px;background:var(--ink);color:#fff}
.lc-bar-t{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 8px;line-height:1.2}
.lc-bar-t b{font-size:15px;font-weight:600}
.lc-bar-t i{font-size:11.5px;font-style:normal;color:#ffffff99}
.lc-live{width:8px;height:8px;border-radius:50%;background:#34c759;align-self:center;box-shadow:0 0 0 0 #34c75966;animation:lcPulse 2s infinite}
@keyframes lcPulse{0%{box-shadow:0 0 0 0 #34c75966}70%{box-shadow:0 0 0 6px #34c75900}100%{box-shadow:0 0 0 0 #34c75900}}
.lc-min{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:none;background:#ffffff1f;color:#fff;border-radius:8px;cursor:pointer;transition:.15s}
.lc-min:hover{background:#ffffff33}
.lc-body{flex:1 1 auto;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:9px;background:var(--gray2)}
.lc-row{display:flex;max-width:82%}
.lc-row.me{align-self:flex-end;justify-content:flex-end}
.lc-row.them{align-self:flex-start}
.lc-bub{position:relative;font-size:14.5px;line-height:1.5;padding:9px 12px;border-radius:14px;white-space:pre-wrap;word-break:break-word}
.lc-row.them .lc-bub{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;color:var(--ink)}
.lc-row.me .lc-bub{background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.lc-t{display:block;font-size:10px;margin-top:3px;opacity:.55}
.lc-sys{align-self:center;font-size:12px;color:#d11;padding:2px 0}
.lc-input{flex:0 0 auto;display:flex;align-items:flex-end;gap:8px;padding:10px;border-top:1px solid var(--line);background:#fff}
.lc-input textarea{flex:1 1 auto;font-family:inherit;font-size:14.5px;line-height:1.4;color:var(--ink);background:var(--gray2);border:1px solid var(--line);border-radius:10px;padding:9px 12px;resize:none;max-height:110px;transition:.15s}
.lc-input textarea:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(10,132,255,.14)}
.lc-send{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:38px;height:38px;border:none;background:var(--accent);color:#fff;border-radius:10px;cursor:pointer;transition:.15s}
.lc-send:hover{background:var(--accentDk)}
/* 「正在输入…」三点动画 + 文字提示（AI 推理等待期显示，用户不会以为没人回） */
.lc-typing{display:flex;gap:5px;align-items:center;padding:11px 14px}
.lc-typing-t{font-style:normal;font-size:12.5px;color:#86868b;margin-left:6px}
.lc-typing span{width:6px;height:6px;border-radius:50%;background:#b6b6bd;animation:lcBlink 1.25s infinite}
.lc-typing span:nth-child(2){animation-delay:.18s}
.lc-typing span:nth-child(3){animation-delay:.36s}
@keyframes lcBlink{0%,60%,100%{opacity:.28;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
/* 实时到达的客服/AI 气泡淡入（区别于刷新重放的历史） */
.lc-in{animation:lcMsgIn .28s ease}
@keyframes lcMsgIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
/* 客服/AI 回复内的轻量 Markdown */
.lc-row.them .lc-bub strong{font-weight:600}
.lc-row.them .lc-bub code{background:rgba(0,0,0,.06);border-radius:4px;padding:1px 5px;font-size:12.5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.lc-row.them .lc-bub .lc-tb{border-collapse:collapse;display:block;width:100%;overflow-x:auto;margin:7px 0;font-size:12.5px}
.lc-row.them .lc-bub .lc-tb th,.lc-row.them .lc-bub .lc-tb td{border:1px solid var(--line);padding:4px 8px;text-align:left;white-space:nowrap}
.lc-row.them .lc-bub .lc-tb th{background:var(--gray2);font-weight:600}
.lc-row.them .lc-bub .lc-src{margin-top:6px;padding-left:9px;border-left:2px solid var(--line);color:#86868b;font-size:11.5px;line-height:1.5}
@media(max-width:480px){.lc-panel{right:10px;bottom:10px;height:calc(100vh - 90px)}}

/* ===== finish pass · 选区 / 键盘焦点 / 微交互（全站共享） ===== */
::selection{background:rgba(10,132,255,.16)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
a:focus-visible,button:focus-visible,.btn:focus-visible,.seg:focus-visible,.qbtn:focus-visible,.langbtn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(10,132,255,.7)}
.btn.ghost:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0);box-shadow:none}
.cl::after{transition:transform .15s}
.cl:hover::after{transform:translateX(2px)}

/* ===== 滚动入场（仅对带 [data-reveal] 的元素生效，且需 <html class="tp-anim">；无 JS / 减少动效时内容照常显示） ===== */
html.tp-anim [data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1);will-change:opacity,transform}
html.tp-anim [data-reveal].in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html.tp-anim [data-reveal]{opacity:1;transform:none;transition:none}
}

/* ===== 移动端汉堡 + 抽屉导航（<900px；从现有 .bar .links 动态构建） ===== */
.navburger{display:none;width:40px;height:40px;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:none;border:none;cursor:pointer;padding:0;-webkit-tap-highlight-color:transparent}
.navburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .28s,opacity .2s}
.navburger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.navburger.on span:nth-child(2){opacity:0}
.navburger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:900px){.navburger{display:flex}}
.mnav-bk{position:fixed;inset:0;z-index:40;background:rgba(10,16,24,.42);opacity:0;transition:opacity .25s}
.mnav-bk.open{opacity:1}
.mnav{position:fixed;top:0;right:0;bottom:0;z-index:41;width:min(85vw,340px);background:#fff;transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.8,.2,1);overflow-y:auto;-webkit-overflow-scrolling:touch;box-shadow:-16px 0 42px -20px rgba(0,0,0,.42);padding:60px 0 34px}
.mnav.open{transform:none}
body.mnav-lock{overflow:hidden}
.mnav-grp{border-bottom:1px solid var(--line)}
.mnav-top{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;background:none;border:none;font-family:inherit;font-size:16px;font-weight:500;color:var(--ink);padding:15px 22px;cursor:pointer;text-align:left}
.mnav-caret{width:12px;height:12px;fill:none;stroke:var(--mut);stroke-width:1.6;flex:0 0 auto;transition:transform .25s}
.mnav-grp.open .mnav-caret{transform:rotate(180deg)}
.mnav-sub{display:none;padding:2px 0 12px;background:var(--gray2)}
.mnav-grp.open .mnav-sub{display:block}
.mnav-sub a{display:block;font-size:14.5px;color:var(--mut);padding:9px 22px 9px 34px;transition:color .15s}
.mnav-sub a.mnav-hd{color:var(--ink);font-weight:600;padding-top:13px}
.mnav-sub a:active,.mnav-sub a:hover{color:var(--accent)}
.mnav-solo{display:block;font-size:16px;font-weight:500;color:var(--ink);padding:15px 22px;border-bottom:1px solid var(--line)}
.mnav-solo:active,.mnav-solo:hover{color:var(--accent)}
body.mnav-lock .fab{display:none}