/* ============================================================
   CNSK — 站点样式
   面向海外 B2B 买家的机械类官网视觉：
   纸面底色 + 墨色文字 + 深墨绿块 + 一点机械警示红。
   直角、细线、等宽数字，整体像一份工程样本册而不是 SaaS 落地页。
   ============================================================ */

/* ---------- 字体（本地自托管，不依赖第三方） ---------- */
@font-face{font-family:'Archivo';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/Archivo-700.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/IBMPlexSans-400.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/IBMPlexMono-400.woff2') format('woff2');}

/* ---------- 设计变量 ---------- */
:root{
  --ink:#15181a;
  --ink-2:#2b3136;
  --paper:#f2f1ec;
  --paper-2:#e8e6de;
  --panel:#ffffff;
  --steel:#6f787e;
  --rule:#d2d0c7;
  --deep:#0b3b39;
  --deep-2:#082e2c;
  --signal:#c1381f;
  --max:1280px;
  --gut:20px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{margin:0;font-family:"Archivo","IBM Plex Sans",Arial,sans-serif;font-weight:700;letter-spacing:-.022em;line-height:1.08;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;}
.lead{font-size:clamp(17px,1.55vw,21px);line-height:1.55;color:var(--ink-2);max-width:62ch;}
.body-note{font-size:14.5px;color:var(--steel);line-height:1.6;max-width:64ch;}

/* 小标签：等宽、小字号、极限字距，用于型号与规格称谓 */
.tag{
  font-family:"IBM Plex Mono",monospace;
  font-size:12px;letter-spacing:.1em;line-height:1.4;
  color:var(--steel);text-transform:uppercase;
}

/* ---------- 布局容器 ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut);}
.rule{height:1px;background:var(--rule);border:0;margin:0;}
.section{padding:56px 0;}
.section--tight{padding:40px 0;}
.section--deep{background:var(--deep);color:#eef1ef;}
.section--deep .lead,.section--deep .tag,.section--deep .body-note{color:#b7c5c3;}
.section--panel{background:var(--panel);}

/* ---------- 头部 ---------- */
.header{
  position:relative;z-index:20;
  background:var(--paper);
  border-bottom:1px solid var(--rule);
}
.header__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:66px;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand__mark{width:26px;height:26px;flex:none;}
.brand__word{font-family:"Archivo",sans-serif;font-weight:700;font-size:21px;letter-spacing:.02em;}
.brand__sub{display:none;font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.12em;color:var(--steel);padding-left:10px;border-left:1px solid var(--rule);}

.nav{display:none;}
.nav a{
  font-size:15px;padding:6px 0;margin-left:26px;color:var(--ink-2);
  border-bottom:1px solid transparent;
}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--ink);color:var(--ink);}

.header__cta{display:none;}

/* 移动端菜单按钮 */
.menu-btn{
  display:inline-flex;align-items:center;gap:8px;
  background:none;border:1px solid var(--rule);border-radius:2px;
  padding:9px 12px;min-height:40px;cursor:pointer;
}
.menu-btn__bar{display:block;width:18px;height:1.5px;background:var(--ink);position:relative;}
.menu-btn__bar::before,.menu-btn__bar::after{content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);}
.menu-btn__bar::before{top:-5px;}
.menu-btn__bar::after{top:5px;}
.menu-btn__txt{font-size:13px;letter-spacing:.04em;}

.drawer{
  display:none;border-bottom:1px solid var(--rule);background:var(--paper);
}
.drawer.is-open{display:block;}
.drawer ul{list-style:none;margin:0;padding:8px 0 18px;}
.drawer li{border-top:1px solid var(--rule);}
.drawer a{display:block;padding:14px 20px;font-size:16px;}
.drawer a:first-of-type{border-top:0;}

/* ---------- 首屏 ---------- */
.hero{padding:36px 0 0;}
.hero__text{padding-top:0;}
.hero__kicker{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.hero__kicker .dot{width:6px;height:6px;background:var(--signal);flex:none;}
.hero h1{font-size:clamp(32px,7.4vw,54px);margin-bottom:20px;}
.hero h1 em{font-style:normal;color:var(--deep);}
.hero__sub{font-size:clamp(16px,1.5vw,19px);color:var(--ink-2);max-width:46ch;margin-bottom:26px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:12px 22px;border:1px solid var(--ink);border-radius:2px;
  font-size:15px;letter-spacing:.01em;
  background:var(--ink);color:#f7f6f2;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{background:var(--deep);border-color:var(--deep);}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule);}
.btn--ghost:hover{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn--signal{background:var(--signal);border-color:var(--signal);color:#fff;}
.btn--signal:hover{background:#a52e18;border-color:#a52e18;}
.btn--wide{width:100%;}

/* 首屏图片：移动端在下，桌面端右侧出血 */
.hero__media{margin-top:8px;position:relative;}
.hero__media img{width:100%;height:auto;border:1px solid var(--rule);}
.hero__caption{
  display:flex;justify-content:space-between;gap:12px;
  padding:9px 0;border-bottom:1px solid var(--rule);
}

/* 数据条 */
.stats{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--rule);margin-top:34px;}
.stat{padding:18px 0 4px;border-bottom:1px solid var(--rule);}
.stat:nth-child(odd){padding-right:16px;}
.stat:nth-child(even){padding-left:16px;border-left:1px solid var(--rule);}
.stat__num{font-family:"Archivo",sans-serif;font-weight:700;font-size:clamp(24px,3.4vw,34px);letter-spacing:-.02em;line-height:1.1;}
.stat__label{font-size:13.5px;color:var(--steel);margin-top:6px;}

/* ---------- 章节标题 ---------- */
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:34px;}
.section-head h2{font-size:clamp(26px,4.2vw,42px);max-width:20ch;}
.section-head__side{color:var(--steel);font-size:14.5px;max-width:34ch;}

/* ---------- 机型列表 ---------- */
.models{border-top:1px solid var(--ink);}
.model{
  display:grid;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--rule);
  text-align:left;
}
.model__media{position:relative;background:var(--panel);border:1px solid var(--rule);}
.model__media img{width:100%;height:auto;aspect-ratio:16/6;object-fit:contain;padding:10px;}
.model__body{display:flex;flex-direction:column;gap:10px;}
.model__code{
  font-family:"IBM Plex Mono",monospace;font-size:13px;letter-spacing:.06em;color:var(--signal);
}
.model h3{font-size:clamp(20px,2.4vw,26px);}
.model p{font-size:15.5px;color:var(--ink-2);margin:0;max-width:52ch;}
.model__specs{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.02em;
  padding:5px 9px;border:1px solid var(--rule);border-radius:2px;color:var(--ink-2);background:var(--panel);
}
.model__more{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--steel);}
.model:hover .model__more{color:var(--ink);}
.model:hover .model__more span{background:var(--ink);}
.model__more span{width:14px;height:1px;background:var(--steel);display:inline-block;}

/* ---------- 工艺流程（真实工序序列，编号有意义） ---------- */
.stages{border-top:1px solid var(--rule);}
.stage{
  display:grid;grid-template-columns:44px 1fr;gap:12px;
  padding:16px 0;border-bottom:1px solid var(--rule);
}
.stage__idx{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--steel);padding-top:4px;}
.stage__name{font-family:"Archivo",sans-serif;font-size:17px;line-height:1.3;}
.stage__note{font-size:14px;color:var(--steel);margin-top:4px;}

/* ---------- 工厂 / 双栏 ---------- */
.split{display:grid;gap:28px;}
.split__media img{width:100%;height:100%;object-fit:cover;border:1px solid var(--rule);}
.figure{margin:0;}
.figure figcaption{font-size:13px;color:var(--steel);padding-top:9px;}

/* ---------- 认证 ---------- */
.cert{display:grid;gap:24px;}
.cert__media img{border:1px solid var(--rule);background:#fff;width:100%;max-width:420px;}
.cert__list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule);}
.cert__list li{display:grid;grid-template-columns:1fr;gap:4px;padding:14px 0;border-bottom:1px solid var(--rule);}
.cert__list strong{font-family:"Archivo",sans-serif;font-size:16px;font-weight:700;}
.cert__list span{font-size:13.5px;color:var(--steel);}

/* ---------- 铭牌（机器的参数铭牌，站点的签名元素） ---------- */
.plate{
  background:var(--deep);
  color:#e9eeec;
  padding:22px 20px;
  border-radius:2px;
  position:relative;
}
.plate::after{
  content:"";position:absolute;inset:6px;border:1px solid rgba(233,238,236,.22);border-radius:1px;pointer-events:none;
}
.plate__head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid rgba(233,238,236,.22);}
.plate__code{font-family:"IBM Plex Mono",monospace;font-size:13px;letter-spacing:.08em;}
.plate__make{font-size:11.5px;letter-spacing:.16em;color:#93a7a4;font-family:"IBM Plex Mono",monospace;}
.plate__grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px;}
.plate__field{display:flex;flex-direction:column;gap:3px;}
.plate__k{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.1em;color:#93a7a4;}
.plate__v{font-family:"IBM Plex Mono",monospace;font-size:15px;line-height:1.35;color:#f3f6f4;}

/* ---------- 规格表 ---------- */
.spec-wrap{border-top:1px solid var(--ink);}
table.spec{width:100%;border-collapse:collapse;table-layout:fixed;}
table.spec th,table.spec td{
  text-align:left;vertical-align:top;
  padding:12px 10px 12px 0;border-bottom:1px solid var(--rule);
  font-size:14.5px;
}
table.spec th{
  font-family:"IBM Plex Mono",monospace;font-weight:400;font-size:12px;letter-spacing:.06em;
  color:var(--steel);text-transform:uppercase;padding-top:14px;
}
table.spec td:first-child{width:52%;}
table.spec td.val{font-family:"IBM Plex Mono",monospace;font-size:14px;}

/* ---------- 特性条目 ---------- */
.features{margin:0;padding:0;list-style:none;border-top:1px solid var(--rule);}
.feature{padding:20px 0;border-bottom:1px solid var(--rule);display:grid;gap:8px;}
.feature__name{font-family:"Archivo",sans-serif;font-size:18px;}
.feature__text{font-size:15px;color:var(--steel);max-width:64ch;}

/* ---------- 市场 ---------- */
.markets{display:grid;grid-template-columns:1fr 1fr;gap:0 20px;border-top:1px solid var(--rule);}
.market{padding:12px 0;border-bottom:1px solid var(--rule);font-size:14.5px;display:flex;justify-content:space-between;gap:10px;}
.market .mono{color:var(--steel);font-size:12px;}

/* ---------- CTA 条 ---------- */
.cta{padding:48px 0;}
.cta__inner{display:grid;gap:24px;}
.cta h2{font-size:clamp(26px,3.6vw,38px);max-width:24ch;}
.cta__actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.cta__alt{font-size:14px;color:#b7c5c3;}

/* ---------- 表单 ---------- */
.form{border-top:1px solid var(--ink);padding-top:24px;}
.field{margin-bottom:16px;display:flex;flex-direction:column;gap:6px;}
.field label{font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.08em;color:var(--steel);text-transform:uppercase;}
.field input,.field select,.field textarea{
  width:100%;padding:12px 12px;border:1px solid var(--rule);border-radius:2px;
  background:var(--panel);font-size:16px;line-height:1.4;
}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--steel);}
.field textarea{min-height:120px;resize:vertical;}
.field .hint{font-size:12.5px;color:var(--steel);}
.field-row{display:grid;gap:0;grid-template-columns:1fr;}
.form__foot{display:flex;flex-direction:column;gap:12px;margin-top:20px;}
.form__note{font-size:13px;color:var(--steel);}
.hp{position:absolute;left:-9999px;}

/* ---------- 联系方式卡 ---------- */
.contact-card{border-top:1px solid var(--rule);}
.contact-row{display:grid;gap:4px;padding:14px 0;border-bottom:1px solid var(--rule);}
.contact-row .tag{margin-bottom:2px;}
.contact-row a,.contact-row strong{font-size:16px;word-break:break-word;}
.contact-row a:hover{color:var(--signal);}
.qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px;}
.qr{display:flex;flex-direction:column;gap:8px;}
.qr img{border:1px solid var(--rule);background:#fff;padding:6px;width:100%;}
.qr span{font-size:12.5px;color:var(--steel);}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:14px 0;font-size:12.5px;color:var(--steel);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{color:var(--rule);}

/* ---------- 产品页头部 ---------- */
.p-hero{padding:8px 0 0;}
.p-hero h1{font-size:clamp(27px,4.6vw,44px);margin-bottom:10px;}
.p-hero__claim{font-size:clamp(16px,1.7vw,19px);color:var(--ink-2);max-width:56ch;}
.p-hero__media{margin:26px 0 0;background:var(--panel);border:1px solid var(--rule);}
.p-hero__media img{width:100%;height:auto;aspect-ratio:16/7;object-fit:contain;padding:16px;}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:#d9d7d0;padding:40px 0 26px;font-size:14px;}
.footer a{color:#d9d7d0;}
.footer a:hover{color:#fff;}
.footer__top{display:grid;gap:26px;padding-bottom:26px;border-bottom:1px solid #343a3e;}
.footer__brand .brand__word{color:#fff;}
.footer__brand p{color:#9aa2a6;max-width:34ch;margin-top:12px;font-size:13.5px;}
.footer__col h4{font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.1em;color:#9aa2a6;text-transform:uppercase;margin-bottom:12px;font-weight:400;}
.footer__col ul{list-style:none;margin:0;padding:0;display:grid;gap:8px;font-size:14px;}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;padding-top:18px;font-size:12.5px;color:#8d9599;}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  :root{--gut:28px;}
  .field-row{grid-template-columns:1fr 1fr;gap:16px;}
  .stats{grid-template-columns:repeat(4,1fr);}
  .stat{border-left:1px solid var(--rule);}
  .stat:nth-child(1){border-left:0;padding-left:0;}
  .stat{padding:22px 16px 6px;}
  .stat:nth-child(odd),.stat:nth-child(even){padding-left:16px;padding-right:16px;}
  .stat:nth-child(1){padding-left:0;}
  .markets{grid-template-columns:repeat(3,1fr);gap:0 24px;}
  .cert__list li{grid-template-columns:1.1fr 1fr;gap:12px;align-items:baseline;}
}

@media (min-width:900px){
  :root{--gut:40px;}
  body{font-size:17px;}
  .header__inner{height:76px;}
  .brand__sub{display:inline-block;}
  .nav{display:flex;align-items:center;}
  .header__cta{display:inline-flex;min-height:42px;padding:9px 18px;font-size:14px;}
  .menu-btn{display:none;}
  .drawer{display:none !important;}
  .section{padding:80px 0;}
  .section--tight{padding:56px 0;}
  .hero{padding:56px 0 0;}
  .model{grid-template-columns:300px 1fr;gap:32px;padding:26px 0;align-items:start;}
  .model__body{flex-direction:row;flex-wrap:wrap;align-items:flex-start;gap:10px 24px;}
  .model__body > *{width:100%;}
  .model h3,.model p{max-width:60ch;}
  .model__more{margin-top:2px;}
  .stage{grid-template-columns:52px 1fr 1fr;gap:18px;padding:18px 0;}
  .stage__note{margin-top:0;padding-top:3px;}
  .split{grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
  .split--wide-left{grid-template-columns:1.15fr 1fr;}
  .cert{grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start;}
  .section-head{flex-direction:row;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:44px;}
  .section-head__side{text-align:right;max-width:32ch;padding-bottom:6px;}
  .cta__inner{grid-template-columns:1.15fr 1fr;align-items:center;gap:56px;}
  .cta__actions{justify-content:flex-end;}
  .qr-grid{grid-template-columns:1fr 1fr;}
  .contact-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:56px;}
  .p-hero{padding:20px 0 0;}
  .p-hero__media{margin-top:34px;}
  .feature{grid-template-columns:260px 1fr;gap:32px;padding:22px 0;}
}

@media (min-width:1160px){
  /* 首屏：文字在左，整机照片向右侧出血 */
  .hero{position:relative;}
  .hero__grid{display:grid;grid-template-columns:minmax(0,5.2fr) minmax(0,6.8fr);gap:48px;align-items:center;}
  .hero__media{
    margin:0 0 0 0;
    margin-right:calc((100vw - var(--max)) / -2 - 40px);
    width:auto;
  }
  .hero__media img{border-right:0;}
  .hero__caption{padding-right:8px;}
  .footer__top{grid-template-columns:1.4fr .7fr .7fr .9fr;gap:40px;}
  .models .model{grid-template-columns:340px 1fr;gap:48px;}
}

/* ---------- 动效与无障碍 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
}
@media print{
  .header,.footer,.cta,.hero__actions,.form{display:none;}
  body{background:#fff;}
}