/* =========================================================
   OEMX Laser & CNC · 型材数控钻铣加工设备
   设计语言对标 GasMixTech：克制、扁平、大留白、弱阴影
   ========================================================= */

/* 字体自托管（本地字号 400–800 可变字重）：
   不依赖 Google Fonts CDN，中国大陆访问不再被阻塞；
   中文 / 日文 / 韩文使用系统字体栈，零下载。 */
@font-face{
  font-family:'Inter';
  font-style:normal;
  font-weight:400 800;
  font-display:swap;
  src:url('fonts/inter-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,
    U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Inter';
  font-style:normal;
  font-weight:400 800;
  font-display:swap;
  src:url('fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,
    U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,
    U+2C60-2C7F,U+A720-A7FF;
}

:root{
  --red:#dc2626;
  --red-dark:#b91c1c;
  --amber:#f59e0b;
  --bg:#f5f5f5;
  --card:#ffffff;
  --ink:#0f172a;
  --ink-2:#475569;
  --ink-3:#64748b;
  --line:#e2e8f0;
  --line-2:#cbd5e1;
  --r-sm:4px;
  --r:6px;
  --shadow:0 1px 2px rgba(0,0,0,.05);
  --shadow-2:0 1px 3px rgba(0,0,0,.07);
  --max:1200px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,
    "PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Noto Sans SC","Hiragino Sans",
    "Microsoft YaHei","Malgun Gothic","Noto Sans CJK KR",Yu Gothic,sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
figure{margin:0;}

.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}
section[id],article[id]{scroll-margin-top:82px;}
.skip{position:absolute;left:-9999px;}
.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 14px;border-radius:var(--r);box-shadow:var(--shadow-2);}

/* ---------- 顶部栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar-in{display:flex;align-items:center;gap:24px;height:66px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  background:var(--red);color:#fff;
  font-weight:700;font-size:15px;letter-spacing:.06em;
  padding:6px 9px;border-radius:var(--r-sm);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-text b{font-size:13.5px;font-weight:600;}
.logo-text i{font-style:normal;font-size:11.5px;color:var(--ink-3);}

.menu{display:flex;align-items:center;gap:22px;margin-left:auto;}
.menu a{font-size:13.5px;color:var(--ink-2);padding:4px 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s;white-space:nowrap;}
.menu a:hover{color:var(--ink);}
.menu a.active{color:var(--red);border-bottom-color:var(--red);}
.menu-cta{
  background:var(--red);color:#fff !important;
  padding:8px 15px !important;border-radius:var(--r-sm);
  border-bottom:0 !important;font-weight:500;
}
.menu-cta:hover{background:var(--red-dark);}

/* ---------- 导航下拉：产品 ---------- */
.menu-drop{position:relative;padding:14px 0;margin:-14px 0;}
.drop-toggle{display:inline-flex;align-items:center;gap:5px;cursor:pointer;}
.drop-toggle::after{
  content:"";width:5px;height:5px;flex-shrink:0;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);opacity:.5;
}
.drop-panel{
  position:absolute;top:100%;left:-16px;min-width:330px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  box-shadow:0 8px 24px rgba(15,23,42,.10);
  padding:8px;display:none;flex-direction:column;gap:2px;z-index:60;
}
.menu-drop:hover .drop-panel,
.menu-drop:focus-within .drop-panel{display:flex;}
.drop-panel a{
  display:flex;flex-direction:column;gap:2px;
  padding:9px 12px;border-radius:var(--r-sm);
  border-bottom:0;transition:background .15s;
}
.drop-panel a:hover{background:#f8fafc;}
.drop-panel a b{font-size:13.5px;font-weight:600;color:var(--ink);}
.drop-panel a span{font-size:11.5px;color:var(--ink-3);line-height:1.5;}
.drop-panel a.drop-link{
  flex-direction:row;justify-content:flex-start;
  margin-top:7px;margin-bottom:1px;padding-top:11px;
  border-top:1px solid var(--line);border-radius:0 0 var(--r-sm) var(--r-sm);
  font-size:12.5px;font-weight:500;color:var(--red);
}

.lang{display:flex;gap:2px;border:1px solid var(--line);border-radius:var(--r-sm);padding:2px;flex-shrink:0;}
.lang-btn{
  background:transparent;border:0;color:var(--ink-3);
  font-size:12px;padding:4px 8px;border-radius:3px;transition:.15s;
}
.lang-btn:hover{color:var(--ink);}
.lang-btn.active{background:var(--ink);color:#fff;}

.burger{display:none;background:transparent;border:0;padding:8px;flex-direction:column;gap:4px;margin-left:auto;}
.burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:1px;}

/* ---------- 通用板块 ---------- */
.sec{padding:84px 0;}
.sec-alt{background:#fff;}
.kicker{
  font-size:11.5px;font-weight:600;letter-spacing:.14em;
  color:var(--red);text-transform:uppercase;margin-bottom:12px;
}
.sec h2{font-size:29px;margin-bottom:14px;}
.sec-sub{font-size:15px;color:var(--ink-2);max-width:760px;}
.sec-note{margin-top:14px;font-size:12.5px;color:var(--ink-3);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block;padding:12px 24px;border-radius:var(--r-sm);
  font-size:14px;font-weight:500;border:1px solid transparent;
  transition:.16s;text-align:center;
}
.btn-primary{background:var(--red);color:#fff;}
.btn-primary:hover{background:var(--red-dark);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-block{width:100%;display:block;}

/* ---------- 首屏 ---------- */
.hero{padding:76px 0 60px;background:#fff;border-bottom:1px solid var(--line);}
.hero h1{font-size:clamp(25px,3.4vw,40px);line-height:1.3;max-width:900px;margin-bottom:18px;letter-spacing:-.02em;}
.hero-desc{font-size:16px;color:var(--ink-2);max-width:700px;margin-bottom:28px;}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px;}
.hero-facts{display:flex;gap:34px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--line);}
.hero-facts li{font-size:13.5px;color:var(--ink-2);padding-left:16px;position:relative;}
.hero-facts li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--red);}

/* ---------- 选型器 ---------- */
.sec-select{background:var(--bg);}
.selector{
  margin-top:34px;display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden;
}
.sel-steps{padding:30px 30px 26px;border-right:1px solid var(--line);}
.sel-step + .sel-step{margin-top:26px;padding-top:24px;border-top:1px solid var(--line);}
.sel-num{
  display:inline-block;font-size:11px;font-weight:700;letter-spacing:.08em;
  color:var(--red);background:#fef2f2;padding:2px 7px;border-radius:3px;margin-bottom:8px;
}
.sel-step h3{font-size:15.5px;font-weight:600;margin-bottom:12px;}
.sel-opts{display:flex;gap:8px;flex-wrap:wrap;}
.sel-opt{
  flex:1 1 0;min-width:130px;text-align:left;
  background:#fff;border:1px solid var(--line-2);border-radius:var(--r-sm);
  padding:11px 13px;transition:.15s;
}
.sel-opt b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:3px;}
.sel-opt span{display:block;font-size:11.5px;color:var(--ink-3);line-height:1.5;}
.sel-opt:hover{border-color:var(--ink-2);}
.sel-opt.on{border-color:var(--red);background:#fef2f2;}
.sel-opt.on b{color:var(--red-dark);}

.sel-result-wrap{padding:30px;display:flex;flex-direction:column;background:#fafafa;}
.sel-result-label{
  font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:14px;
}
.sel-result-body{flex:1;display:flex;gap:20px;align-items:center;}
.sel-result-body.sel-empty{color:var(--ink-3);font-size:13.5px;justify-content:center;text-align:center;}
.sel-result-body img{
  width:190px;height:140px;object-fit:cover;border-radius:var(--r-sm);
  border:1px solid var(--line);flex-shrink:0;
}
.sel-result-text{min-width:0;}
.sel-model{font-size:19px;font-weight:700;color:var(--red);letter-spacing:.01em;margin-bottom:5px;}
.sel-name{font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.sel-why{font-size:12.5px;color:var(--ink-2);line-height:1.65;}
.sel-extra{
  margin-top:8px;font-size:12.5px;line-height:1.65;color:var(--ink-2);
  background:#fffbeb;border-left:2px solid var(--amber);padding:7px 10px;border-radius:3px;
}
.sel-stroke{
  margin-top:8px;font-size:12px;line-height:1.6;color:var(--ink-3);
  padding-top:8px;border-top:1px dashed var(--line-2);
}
.sel-note{margin-top:16px;font-size:12.5px;color:var(--ink-3);}

/* ---------- 产品架构 ---------- */
.prod-list{margin-top:36px;display:flex;flex-direction:column;gap:2px;}
.prod-item{
  display:grid;grid-template-columns:64px 1fr 380px;gap:26px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:26px;align-items:start;box-shadow:var(--shadow);
}
.prod-num{font-size:26px;font-weight:700;color:var(--line-2);line-height:1;letter-spacing:-.02em;}
.prod-model{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--red);background:#fef2f2;padding:2px 8px;border-radius:3px;margin-bottom:9px;
}
.prod-body h3{font-size:19px;margin-bottom:10px;}
.prod-desc{font-size:13.5px;color:var(--ink-2);margin-bottom:14px;}
.prod-feats{display:flex;flex-direction:column;gap:7px;}
.prod-feats li{font-size:13px;color:var(--ink-2);padding-left:18px;position:relative;}
.prod-feats li::before{
  content:"";position:absolute;left:0;top:8px;width:7px;height:7px;
  border:1.5px solid var(--red);border-radius:2px;
}
.prod-media img{width:100%;height:230px;object-fit:cover;border-radius:var(--r-sm);border:1px solid var(--line);}

/* ---------- 技术参数 ---------- */
.specs-tabs{display:flex;gap:8px;margin:30px 0 20px;flex-wrap:wrap;}
.spec-tab{
  background:#fff;border:1px solid var(--line-2);border-radius:var(--r-sm);
  padding:9px 16px;font-size:13px;color:var(--ink-2);transition:.15s;
}
.spec-tab b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);}
.spec-tab span{font-size:11.5px;color:var(--ink-3);}
.spec-tab:hover{border-color:var(--ink-2);}
.spec-tab.on{border-color:var(--red);background:#fef2f2;}
.spec-tab.on b{color:var(--red-dark);}

.specs-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px;box-shadow:var(--shadow);}
.specs-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.specs-table th,.specs-table td{padding:11px 16px;text-align:left;border-bottom:1px solid var(--line);}
.specs-table thead th{
  background:#fafafa;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--ink-3);text-transform:uppercase;
}
.specs-table tbody tr:last-child td{border-bottom:0;}
.specs-table td:last-child{font-weight:500;color:var(--ink);}
.specs-table tbody tr:hover{background:#fafafa;}
.specs-table tr.grp td{background:#f8fafc;font-size:11.5px;font-weight:600;letter-spacing:.1em;color:var(--ink-3);text-transform:uppercase;}

/* ---------- 配置 ---------- */
.cfg-grid{margin-top:30px;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;}
.cfg-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:14px 16px;box-shadow:var(--shadow);
}
.cfg-item b{display:block;font-size:13px;font-weight:600;margin-bottom:4px;}
.cfg-item span{font-size:12.5px;color:var(--ink-3);line-height:1.6;}
.brand-table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px;box-shadow:var(--shadow);}
.cfg-col h3{font-size:14px;font-weight:600;margin-bottom:12px !important;}

/* ---------- 设备细节 ---------- */
.detail-grid{margin-top:30px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.dtile{position:relative;border-radius:var(--r);overflow:hidden;background:#0f172a;height:250px;cursor:zoom-in;border:1px solid var(--line);}
.dtile img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.dtile:hover img{transform:scale(1.05);}
.dtile-cap{
  position:absolute;left:0;right:0;bottom:0;padding:16px;
  background:linear-gradient(transparent,rgba(15,23,42,.88));color:#fff;
}
.dtile-cap b{display:block;font-size:13.5px;font-weight:600;margin-bottom:2px;}
.dtile-cap span{font-size:11.5px;color:#cbd5e1;line-height:1.5;}

/* ---------- 视频 ---------- */
.video-grid{margin-top:30px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.vtile{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);}
.vtile video{width:100%;aspect-ratio:16/9;object-fit:cover;background:#0f172a;display:block;}
.vtile-body{padding:15px 17px 17px;}
.vtile-body b{display:block;font-size:13.5px;font-weight:600;margin-bottom:4px;}
.vtile-body span{font-size:12px;color:var(--ink-3);line-height:1.6;}

/* ---------- 应用行业 ---------- */
.ind-grid{margin-top:30px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.ind-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:17px 18px;}
.ind-card b{display:block;font-size:13.5px;font-weight:600;margin-bottom:5px;}
.ind-card span{font-size:12.5px;color:var(--ink-3);line-height:1.6;}
.svc-grid{margin-top:22px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.svc-card{background:#fff;border:1px solid var(--line);border-left:3px solid var(--red);border-radius:var(--r-sm);padding:16px 18px;}
.svc-card b{display:block;font-size:13.5px;font-weight:600;margin-bottom:5px;}
.svc-card span{font-size:12.5px;color:var(--ink-3);line-height:1.6;}

/* ---------- FAQ ---------- */
.faq-list{margin-top:30px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;
  padding:19px 40px 19px 0;font-size:14.5px;font-weight:500;color:var(--ink);
  position:relative;line-height:1.6;
}
.faq-q::after{
  content:"";position:absolute;right:12px;top:26px;
  width:7px;height:7px;border-right:1.5px solid var(--ink-3);border-bottom:1.5px solid var(--ink-3);
  transform:rotate(45deg);transition:transform .2s;
}
.faq-item.open .faq-q::after{transform:rotate(-135deg);}
.faq-q:hover{color:var(--red);}
.faq-a{
  display:none;padding:0 40px 20px 0;font-size:13.5px;color:var(--ink-2);line-height:1.8;
}
.faq-item.open .faq-a{display:block;}

/* ---------- 联系 ---------- */
.sec-contact{background:#fff;border-top:1px solid var(--line);}
.contact-wrap{display:grid;grid-template-columns:1fr 460px;gap:56px;}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
.cta-points li{font-size:13.5px;color:var(--ink-2);padding-left:20px;position:relative;}
.cta-points li::before{
  content:"";position:absolute;left:0;top:8px;width:8px;height:8px;
  border:1.5px solid var(--red);border-radius:2px;
}
.contact-form{display:flex;flex-direction:column;gap:13px;}
.contact-form label{display:flex;flex-direction:column;gap:6px;}
.contact-form label span{font-size:12.5px;font-weight:500;color:var(--ink-2);}
.contact-form input,.contact-form textarea{
  font:inherit;font-size:13.5px;color:var(--ink);
  background:#f8fafc;border:1px solid var(--line-2);border-radius:var(--r-sm);
  padding:10px 13px;transition:.15s;resize:vertical;
}
.contact-form input:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--red);background:#fff;
}
.form-tip{font-size:12.5px;color:var(--ink-3);min-height:18px;line-height:1.7;}
.form-tip.form-tip-error{color:var(--red);}
.form-note{font-size:12px;color:var(--ink-3);line-height:1.75;margin:0 0 10px;}
.form-alt{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3);
  margin-top:10px;padding-top:13px;border-top:1px solid var(--line);
}
.btn-copy{
  background:transparent;border:1px solid var(--line-2);border-radius:4px;
  padding:5px 11px;font-size:12px;color:var(--ink-2);transition:.2s;
}
.btn-copy:hover{border-color:var(--red);color:var(--red);}
.c-link{color:var(--red);text-decoration:none;border-bottom:1px solid rgba(220,38,38,.32);transition:.2s;}
.c-link:hover{border-bottom-color:var(--red);}
@media (max-width:560px){ .form-alt{flex-direction:column;align-items:flex-start;gap:7px;} }
.contact-info{margin-top:22px;display:flex;flex-direction:column;gap:9px;padding-top:20px;border-top:1px solid var(--line);}
.contact-info li{font-size:13px;color:var(--ink-2);}
.contact-info b{color:var(--ink);font-weight:600;}

/* ---------- 页脚 ---------- */
.footer{background:#0f172a;color:#cbd5e1;padding:54px 0 26px;}
.footer-in{display:grid;grid-template-columns:1.6fr 1fr 1.3fr;gap:40px;padding-bottom:34px;border-bottom:1px solid #1e293b;}
.footer .logo-mark{display:inline-block;margin-bottom:14px;}
.footer-name{font-size:13.5px;color:#e2e8f0;font-weight:500;margin-bottom:6px;}
.footer-note{font-size:12.5px;color:#94a3b8;}
.footer h4{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#64748b;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col a,.footer-col li{font-size:13px;color:#cbd5e1;}
.footer-col a:hover{color:#fff;}
.footer-bottom{padding-top:22px;font-size:12px;color:#64748b;}

.totop{
  position:fixed;right:22px;bottom:22px;z-index:40;
  width:40px;height:40px;border-radius:50%;
  background:#fff;color:var(--ink);border:1px solid var(--line-2);
  box-shadow:var(--shadow-2);font-size:16px;
  opacity:0;pointer-events:none;transition:.2s;
}
.totop.show{opacity:1;pointer-events:auto;}
.totop:hover{border-color:var(--ink);}

/* ---------- 灯箱 ---------- */
.lb{position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.92);display:none;align-items:center;justify-content:center;padding:40px;}
.lb.show{display:flex;}
.lb img{max-width:100%;max-height:88vh;object-fit:contain;border-radius:var(--r);}
.lb-close{position:absolute;top:20px;right:24px;background:transparent;border:0;color:#fff;font-size:30px;line-height:1;}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .menu{gap:16px;}
  .menu a{font-size:13px;}
  .prod-item{grid-template-columns:52px 1fr 300px;gap:20px;}
  .contact-wrap{grid-template-columns:1fr;gap:34px;}
  .ind-grid,.svc-grid{grid-template-columns:repeat(2,1fr);}
  .video-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .burger{display:flex;}
  .menu{
    position:absolute;left:0;right:0;top:66px;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px;
    display:none;box-shadow:var(--shadow-2);
  }
  .menu.open{display:flex;}
  .menu a{padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;}
  .menu a.active{border-bottom-color:var(--line);}

  .menu-drop{padding:0;margin:0;}
  .drop-toggle::after{display:none;}
  .drop-panel{
    position:static;display:flex;min-width:0;
    background:transparent;border:0;box-shadow:none;border-radius:0;
    padding:0 0 0 12px;
  }
  .drop-panel a{padding:10px 0;border-radius:0;}
  .drop-panel a b{font-size:13px;}
  .drop-panel a.drop-link{
    margin-top:0;padding-top:10px;border-radius:0;
  }
  .menu-cta{margin-top:10px;text-align:center;}
  .topbar-in{height:60px;}
  .menu{top:60px;}
  .lang{margin-left:0;}

  .hero{padding:52px 0 44px;}
  .hero h1{font-size:28px;}
  .hero-desc{font-size:15px;}
  .hero-facts{gap:16px;flex-direction:column;}
  .sec{padding:56px 0;}
  .sec h2{font-size:23px;}

  .selector{grid-template-columns:1fr;}
  .sel-steps{border-right:0;border-bottom:1px solid var(--line);padding:24px 20px;}
  .sel-result-wrap{padding:24px 20px;}
  .sel-result-body{flex-direction:column;align-items:stretch;}
  .sel-result-body img{width:100%;height:180px;}
  .sel-opt{min-width:0;flex:1 1 100%;}

  .prod-item{grid-template-columns:1fr;gap:16px;padding:20px;}
  .prod-num{font-size:20px;}
  .prod-media img{height:190px;}

  .detail-grid,.video-grid,.ind-grid,.svc-grid{grid-template-columns:1fr;}
  .dtile{height:210px;}

  .footer-in{grid-template-columns:1fr;gap:28px;}
  .contact-wrap{gap:28px;}
}

/* =========================================================
   v4 视觉升级：深色首屏 · 机型详情页 · 质感提升
   ========================================================= */

/* ---------- 深色首屏 ---------- */
.hero{position:relative;overflow:hidden;background:#0a1523;color:#fff;padding:0;border-bottom:0;}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 520px at 78% 16%, rgba(220,38,38,.22), transparent 62%),
    radial-gradient(760px 520px at 10% 90%, rgba(56,120,200,.16), transparent 60%),
    linear-gradient(160deg,#0b1727 0%,#0a1523 46%,#0d1c2e 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 58% 38%,#000 0%,transparent 76%);
  mask-image:radial-gradient(circle at 58% 38%,#000 0%,transparent 76%);
}
.hero-in{
  position:relative;display:grid;grid-template-columns:1.06fr .94fr;
  gap:50px;align-items:center;padding:84px 24px 76px;
}
.kicker-light{color:#ff6b6b;}
.hero h1{
  font-size:clamp(29px,4.1vw,50px);line-height:1.17;letter-spacing:-.03em;font-weight:800;
  max-width:620px;margin:14px 0 20px;color:#fff;
}
.hero-desc{font-size:15.5px;line-height:1.85;color:#a9bed4;max-width:560px;margin-bottom:32px;}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;}
.btn-ghost-light{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.28);}
.btn-ghost-light:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.5);}
.hero-media{
  margin:0;border-radius:10px;overflow:hidden;position:relative;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 30px 70px -22px rgba(0,0,0,.72);
}
.hero-media img{width:100%;height:auto;display:block;}
.hero-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:28px 20px 16px;
  background:linear-gradient(transparent,rgba(6,14,24,.94));
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
}
.hero-media figcaption b{font-size:15px;font-weight:700;letter-spacing:.02em;color:#fff;}
.hero-media figcaption span{font-size:12px;color:#9fb4c9;}
.hero-facts-bar{position:relative;border-top:1px solid rgba(255,255,255,.1);background:rgba(5,12,20,.5);}
.hero-facts{display:flex;gap:38px;flex-wrap:wrap;padding:20px 0;border-top:0;}
.hero-facts li{font-size:13.5px;color:#a9bed4;padding-left:16px;position:relative;}
.hero-facts li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--red);}

/* ---------- 产品卡增强 ---------- */
.prod-item{transition:box-shadow .25s,transform .25s;}
.prod-item:hover{box-shadow:0 14px 34px -14px rgba(15,23,42,.18);}
.prod-tag{
  display:inline-block;font-size:12px;font-weight:500;color:var(--red);
  background:#fef2f2;border-radius:3px;padding:3px 9px;margin-bottom:12px;
}
.prod-media{display:block;border-radius:var(--r-sm);overflow:hidden;}
.prod-link{
  display:inline-flex;align-items:center;gap:7px;margin-top:16px;
  font-size:13.5px;font-weight:600;color:var(--red);
}
.prod-link span{transition:transform .2s;}
.prod-link:hover span{transform:translateX(4px);}

/* ---------- 关键技术参数对比表 ---------- */
.cmp-scroll{
  margin-top:30px;overflow-x:auto;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);
}
.cmp-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:740px;}
.cmp-table th,.cmp-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);}
.cmp-table thead th{background:#fafafa;vertical-align:bottom;}
.cmp-table thead th a{display:block;}
.cmp-table thead th b{display:block;font-size:14px;font-weight:700;color:var(--red);margin-bottom:3px;}
.cmp-table thead th span{font-size:11.5px;font-weight:400;color:var(--ink-3);line-height:1.5;}
.cmp-table thead th:hover{background:#fef2f2;}
.cmp-table tbody th{width:200px;font-weight:400;font-size:13px;color:var(--ink-2);background:#fcfcfd;}
.cmp-table tbody td{font-weight:500;color:var(--ink);}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-na{color:var(--line-2) !important;}
.opt-tag{
  display:inline-block;vertical-align:middle;margin-left:5px;
  font-size:10.5px;font-weight:600;letter-spacing:.04em;
  color:#b45309;background:#fffbeb;border:1px solid rgba(245,158,11,.45);
  border-radius:3px;padding:1px 5px;
}

/* ---------- 机型页：面包屑 ---------- */
.crumb-bar{background:#fafbfc;border-bottom:1px solid var(--line);}
.crumb{display:flex;align-items:center;gap:9px;padding:13px 0;font-size:12.5px;color:var(--ink-3);}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--red);}
.crumb b{color:var(--ink);font-weight:600;}
.crumb-sep{color:var(--line-2);}

/* ---------- 机型页：机型头（深色） ---------- */
.mhero{position:relative;overflow:hidden;background:#0a1523;color:#fff;}
.mhero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(820px 460px at 84% 18%, rgba(220,38,38,.20), transparent 60%),
    radial-gradient(680px 460px at 8% 92%, rgba(56,120,200,.14), transparent 58%),
    linear-gradient(155deg,#0b1727,#0d1c2e);
}
.mhero-in{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center;padding:62px 24px 64px;}
.mhero-num{
  display:inline-block;margin-bottom:14px;padding:2px 8px;border-radius:3px;
  font-size:12px;font-weight:700;letter-spacing:.1em;color:#ff6b6b;
  border:1px solid rgba(255,107,107,.4);
}
.mhero h1{font-size:clamp(27px,3.5vw,42px);font-weight:800;line-height:1.16;letter-spacing:-.02em;color:#fff;}
.mhero-name{font-size:16px;font-weight:500;color:#cfe0f0;margin-top:10px;}
.mhero-tag{font-size:13.5px;color:#ff9f7a;margin-top:8px;}
.mhero-desc{font-size:14.5px;line-height:1.85;color:#a9bed4;margin-top:18px;max-width:580px;}
.mhero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px;}
.mhero-media{
  margin:0;border-radius:10px;overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 30px 70px -22px rgba(0,0,0,.72);
}
.mhero-media img{width:100%;display:block;}

/* ---------- 机型页：核心特点 ---------- */
.feat-grid{margin-top:30px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.feat-item{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:18px 20px;box-shadow:var(--shadow);
}
.feat-idx{flex-shrink:0;padding-top:2px;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--red);}
.feat-item p{font-size:13.5px;line-height:1.75;color:var(--ink-2);}

/* ---------- 机型页：行程提示 ---------- */
.stroke-tip{
  margin-top:10px;padding:9px 13px;border-radius:3px;
  font-size:12.5px;color:var(--ink-2);
  background:#fffbeb;border-left:2px solid var(--amber);
}

/* ---------- 机型页：元器件品牌表 ---------- */
.brand-wrap{
  margin-top:30px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);
}
.brand-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.brand-table th,.brand-table td{padding:12px 18px;text-align:left;border-bottom:1px solid var(--line);}
.brand-table thead th{
  background:#fafafa;font-size:11.5px;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink-3);
}
.brand-table td{color:var(--ink-2);}
.brand-table td b{font-weight:600;color:var(--ink);}
.brand-table tbody tr:last-child td{border-bottom:0;}
.brand-table tbody tr:hover{background:#fafafa;}

/* ---------- 机型页：其他机型 ---------- */
.other-grid{margin-top:26px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.other-card{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:20px 22px;box-shadow:var(--shadow);transition:.2s;
}
.other-card:hover{border-color:var(--red);}
.other-num{font-size:18px;font-weight:700;color:var(--line-2);}
.other-card b{display:block;font-size:14.5px;font-weight:700;color:var(--red);}
.other-card span{display:block;margin-top:2px;font-size:12.5px;color:var(--ink-3);}
.other-card i{font-style:normal;color:var(--ink-3);}
.other-card:hover i{color:var(--red);}

/* ---------- 机型页：询价与视频 ---------- */
.quote-for{margin-top:8px;font-size:13.5px;color:var(--ink-2);}
.quote-for b{font-weight:600;color:var(--red);}
.video-grid-single{grid-template-columns:minmax(0,880px);}

/* ---------- v5 首屏机型轮播 ---------- */
.hero-media.hero-slider{overflow:hidden;}
.hs-view{position:relative;width:100%;aspect-ratio:3/2;background:#0b1727;overflow:hidden;}
.hs-view .hs-slide{
  position:absolute;inset:0;display:block;opacity:0;visibility:hidden;
  transition:opacity .85s cubic-bezier(.4,0,.2,1),visibility .85s;
}
.hs-view .hs-slide.on{opacity:1;visibility:visible;z-index:1;}
.hs-view .hs-slide img{width:100%;height:100%;object-fit:cover;display:block;transform:scale(1.05);}
.hs-view .hs-slide.on img{animation:hsZoom 7.5s cubic-bezier(.22,.61,.36,1) forwards;}
@keyframes hsZoom{from{transform:scale(1.05);}to{transform:scale(1);}}

.hero-media .hs-cap{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:56px 180px 19px 22px;
  background:linear-gradient(transparent,rgba(6,14,24,.96));
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
}
.hs-count{
  position:absolute;left:20px;top:18px;z-index:4;font-size:11px;letter-spacing:.18em;
  color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;
}
.hs-arrow{
  position:absolute;top:46%;transform:translateY(-50%);z-index:4;
  width:42px;height:42px;border-radius:50%;padding:0;
  border:1px solid rgba(255,255,255,.3);background:rgba(8,17,28,.5);color:#fff;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  transition:background .2s,border-color .2s,transform .2s;
}
.hs-arrow svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.hs-arrow:hover{background:var(--red);border-color:var(--red);}
.hs-arrow:active{transform:translateY(-50%) scale(.94);}
.hs-prev{left:16px;}
.hs-next{right:16px;}

.hs-dots{position:absolute;right:22px;bottom:21px;z-index:4;display:flex;gap:8px;}
.hs-dot{
  position:relative;width:38px;height:3px;padding:0;border:0;border-radius:2px;
  background:rgba(255,255,255,.32);cursor:pointer;overflow:hidden;
  transition:background .25s;
}
.hs-dot:hover{background:rgba(255,255,255,.55);}
.hs-dot::after{content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:var(--red);}
.hs-dot.on::after{animation:hsFill 5.6s linear forwards;}
@keyframes hsFill{from{width:0;}to{width:100%;}}
.hs-static{display:block;width:100%;height:auto;}
@media (prefers-reduced-motion:reduce){
  .hs-view .hs-slide{transition:none;}
  .hs-view .hs-slide.on img{animation:none;transform:none;}
  .hs-dot.on::after{animation:none;width:100%;}
}

/* ---------- v4 响应式 ---------- */
@media (max-width:1080px){
  .hero-in,.mhero-in{grid-template-columns:1fr;gap:34px;padding:62px 24px 56px;}
  .hero-media,.mhero-media{max-width:620px;}
  .cmp-table tbody th{width:150px;}
}
@media (max-width:860px){
  .hero-in,.mhero-in{padding:44px 24px 42px;}
  .hero h1,.mhero h1{font-size:26px;}
  .hero-desc,.mhero-desc{font-size:14.5px;}
  .hero-facts{gap:14px;flex-direction:column;}
  .feat-grid,.other-grid{grid-template-columns:1fr;}
  .brand-table th,.brand-table td{padding:10px 13px;font-size:12.5px;}
  .vcmp-table{min-width:640px;}
  .hs-arrow{display:none;}
  .hero-media .hs-cap{padding:52px 22px 46px;}
  .hs-dots{right:auto;left:22px;bottom:20px;}
}

/* ---------- 滚动淡入（JS 添加 .reveal） ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}