:root{
  --orange:#fe4404;
  --orange-2:#e54812;
  --paper:#FBF9F7;
  --tan:#DBD5C9;
  --taupe:#c3bcb9;
  --ink:#36332E;
  --ink-2:#2A2723;
  --gray-l:#e7e5e6;
  --gray-m:#7f7a73;
  --gray-d:#524f49;
  --ease:cubic-bezier(.16,.01,.3,1);
  /* 硬朗工业字体栈：西文/数字优先 DIN 衍生窄高几何体 Barlow Condensed，中文重黑 Noto Sans SC 900 */
  --display:'Barlow Condensed','Noto Sans SC','PingFang SC','Microsoft YaHei','Heiti SC','SimHei',sans-serif;
  --cond:'Barlow Condensed','Oswald','DIN Condensed','Arial Narrow',sans-serif;
  --sans:'Inter','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1400px;margin:0 auto;padding:0 6vw}
@media(max-width:760px){.wrap{padding:0 6.4vw}}

/* ====== 顶部条 ====== */
.topbar{background:var(--ink-2);color:#fff;font-size:12.5px;letter-spacing:.03em}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:16px}
.topbar a{color:#fff;transition:color .25s;text-decoration:none}
.topbar a:hover{color:var(--orange)}
.topbar b{font-family:var(--cond);font-size:15px;letter-spacing:.08em;font-weight:800}
.topbar .loc{color:rgba(255,255,255,.88)}
.topbar .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--orange);margin-right:8px;vertical-align:middle;animation:pulseDot 2.4s ease-in-out infinite}
.topbar .tel-ico{width:13px;height:13px;vertical-align:-2px;margin-right:5px;stroke:var(--orange);fill:none;stroke-width:2.2}
/* 键盘焦点可见（可访问性） */
.topbar a:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:2px}
/* 触屏无 hover：直接展示毛玻璃细节条与图片压暗，保证信息完整 */
@media(hover:none){
  .prod-img::after{opacity:1}
  .prod-grain{transform:none;opacity:1}
}

@media(max-width:760px){
  .s1 .bg,.s3 .bg{opacity:.36}
  .s1 .sweep{display:none}
  .s1 .eyebrow{font-size:12px;letter-spacing:.12em}
  .s4 .giant-sub{letter-spacing:.14em;font-size:12px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
}

/* ====== 导航（v4.5 · 参考 21st.dev Origin UI navigation-bar 三段式） ====== */
.nav{position:sticky;top:0;z-index:100;background:rgba(251,249,247,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(54,51,46,.1);transition:box-shadow .3s var(--ease),background .3s var(--ease)}
/* 滚动后加深阴影 + 提高不透明度，保证长页面下可读性 */
.nav.is-stuck{background:rgba(251,249,247,.97);box-shadow:0 6px 24px rgba(54,51,46,.1)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px;transition:height .3s var(--ease)}
.nav.is-stuck .wrap{height:62px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand:focus-visible{outline:2px solid var(--orange);outline-offset:4px;border-radius:3px}
.brand-mark{width:34px;height:34px;flex-shrink:0;transition:transform .5s var(--ease)}
.brand:hover .brand-mark{transform:rotate(30deg)}
.brand-txt b{display:block;font-family:var(--display);font-weight:900;font-size:21px;letter-spacing:.1em;line-height:1.05}
.brand-txt span{display:block;font-family:var(--cond);font-weight:700;font-size:11px;color:var(--gray-m);letter-spacing:.26em;text-transform:uppercase;margin-top:2px}

/* --- 左区：品牌 + 桌面菜单 --- */
.nav-left{display:flex;align-items:center;gap:28px;min-width:0}
.nav-links{display:flex;gap:26px;font-size:15px;font-weight:700;align-items:center}
.nav-links a{padding:6px 0;color:var(--ink);position:relative;transition:color .25s;white-space:nowrap}
.nav-links a:focus-visible{outline:2px solid var(--orange);outline-offset:4px}
.nav-links a:not(.nav-cta)::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav-links a:not(.nav-cta):hover{color:var(--orange)}
.nav-links a:not(.nav-cta):hover::after{transform:scaleX(1)}
.nav-links a[aria-current="page"]{color:var(--orange)}
.nav-links a[aria-current="page"]::after{transform:scaleX(1)}

/* --- 右区：ghost 电话 + solid 主 CTA（制造业线索优先） --- */
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-tel{display:inline-flex;align-items:center;gap:7px;padding:9px 14px;border-radius:2px;font-family:var(--cond);font-weight:700;font-size:14px;letter-spacing:.05em;color:var(--ink);transition:background .25s,color .25s}
.nav-tel:hover{background:rgba(54,51,46,.07);color:var(--orange)}
.nav-tel:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.nav-tel svg{width:15px;height:15px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nav-cta{display:inline-flex;align-items:center;gap:7px;background:var(--orange);color:#fff !important;padding:10px 20px;border-radius:2px;font-weight:700;font-size:14.5px;letter-spacing:.04em;transition:background .25s,transform .25s,box-shadow .25s}
.nav-cta:hover{background:var(--ink);transform:translateY(-1px);box-shadow:0 6px 16px rgba(54,51,46,.2)}
.nav-cta:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.nav-cta svg{width:14px;height:14px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;transition:transform .3s var(--ease)}
.nav-cta:hover svg{transform:translateX(3px)}

/* --- 汉堡按钮（默认隐藏，≤960px 显示；动画曲线取自 Origin UI） --- */
.nav-burger{display:none;margin-left:2px;width:44px;height:44px;padding:0;border:0;background:none;cursor:pointer;position:relative;border-radius:3px;flex-shrink:0}
.nav-burger:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.nav-burger span{position:absolute;left:11px;width:22px;height:2px;background:var(--ink);border-radius:2px;transform-origin:center;transition:transform .3s cubic-bezier(.5,.85,.25,1.1),opacity .25s var(--ease),top .3s cubic-bezier(.5,.85,.25,1.1)}
.nav-burger span:nth-child(1){top:15px}
.nav-burger span:nth-child(2){top:21px}
.nav-burger span:nth-child(3){top:27px}
.nav-burger[aria-expanded="true"] span:nth-child(1){top:21px;transform:rotate(315deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){top:21px;transform:rotate(135deg)}

/* --- 移动端抽屉（保留 Popover 的 align:start 定位逻辑，改为右侧滑出） --- */
.nav-drawer{position:fixed;inset:0;z-index:99;visibility:hidden;pointer-events:none}
.nav-drawer__mask{position:absolute;inset:0;background:rgba(20,18,15,.5);opacity:0;transition:opacity .35s var(--ease)}
.nav-drawer__panel{position:absolute;top:0;right:0;bottom:0;width:min(84vw,340px);background:var(--paper);box-shadow:-8px 0 40px rgba(0,0,0,.24);transform:translateX(100%);transition:transform .38s var(--ease);display:flex;flex-direction:column;padding:76px 0 24px;overflow-y:auto}
.nav-drawer.open{visibility:visible;pointer-events:auto}
.nav-drawer.open .nav-drawer__mask{opacity:1}
.nav-drawer.open .nav-drawer__panel{transform:translateX(0)}
.nav-drawer a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 26px;font-size:16px;font-weight:700;color:var(--ink);border-bottom:1px solid rgba(54,51,46,.08);transition:background .25s,color .25s,padding-left .25s}
.nav-drawer a:hover,.nav-drawer a:focus-visible{background:rgba(254,68,4,.07);color:var(--orange);padding-left:32px;outline:none}
.nav-drawer a .en{font-family:var(--cond);font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--gray-m);text-transform:uppercase}
.nav-drawer .d-tel{margin:22px 26px 0;padding:12px 22px;border:1.5px solid var(--ink);border-radius:2px;font-family:var(--cond);font-size:16px;letter-spacing:.06em;text-align:center;border-bottom:1.5px solid var(--ink)}
.nav-drawer .d-tel:hover{background:var(--ink);color:#fff;padding-left:22px}
.nav-drawer .d-cta{margin:10px 26px 0;padding:13px 22px;background:var(--orange);color:#fff;border-radius:2px;text-align:center;font-weight:700;letter-spacing:.04em;border-bottom:0}
.nav-drawer .d-cta:hover{background:var(--ink);color:#fff;padding-left:22px}
body.nav-locked{overflow:hidden}

@media(max-width:1120px){.nav-links{gap:20px;font-size:14.5px}.nav-tel{padding:9px 11px}}

/* --- ≤960px：切换为汉堡 + 抽屉（与 Origin UI 的 md: 阈值同构） --- */
@media(max-width:960px){
  .nav-left{display:contents}
  .nav-links{display:none}
  .nav-burger{display:block}
  .nav .wrap{height:64px}
  .nav.is-stuck .wrap{height:58px}
  .nav-tel{padding:9px 10px}
  .nav-tel .tel-txt{display:none}
  .nav-cta{padding:10px 15px;font-size:14px}
}
/* --- ≤760px：顶部条精简为「热线优先」 --- */
@media(max-width:760px){
  .topbar{font-size:12px}.topbar .loc{display:none}.topbar .wrap{justify-content:center}
  .brand-txt b{font-size:19px;letter-spacing:.08em}
  .brand-txt span{font-size:10px;letter-spacing:.2em}
  .brand-mark{width:30px;height:30px}
  .nav .wrap{height:58px}
  .nav.is-stuck .wrap{height:54px}
  .nav-cta{display:none}   /* 抽屉内已有主 CTA，避免窄屏双 CTA 挤压 */
  .nav-tel{padding:9px}
}
/* --- ≤380px：超窄屏 --- */
@media(max-width:380px){
  .brand-txt span{display:none}
  .brand-txt b{font-size:18px}
  .nav-burger{width:40px}
  .nav-burger span{left:9px;width:20px}
}

/* ====== 屏8 · 页脚 ====== */
footer{background:var(--paper);padding:80px 0 0;color:var(--ink)}
.f-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px}
.f-grid h4{font-family:var(--display);font-size:15px;font-weight:900;margin-bottom:16px;letter-spacing:.06em}
.f-grid h4 span{display:block;font-family:var(--cond);font-size:11.5px;letter-spacing:.2em;color:var(--gray-m);font-weight:700;margin-top:2px;text-transform:uppercase}
.f-grid ul{list-style:none}
.f-grid li{margin-bottom:10px;font-size:13.5px;color:var(--gray-d)}
.f-grid li a:hover{color:var(--orange)}
.f-contact b{color:var(--orange);font-size:28px;font-family:var(--cond);font-weight:800;letter-spacing:.06em}
.f-bottom{border-top:1px solid rgba(54,51,46,.12);padding:22px 0;display:flex;justify-content:space-between;font-size:12px;color:var(--gray-m);flex-wrap:wrap;gap:8px}
@media(max-width:960px){.f-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.f-grid{grid-template-columns:1fr;gap:28px}}


:focus-visible{outline:3px solid var(--ink);outline-offset:4px}
.skip-link{position:fixed;left:16px;top:-100px;z-index:300;background:#fff;padding:12px}
.skip-link:focus{top:12px}
.draft-notice{background:#e7e5e6;color:#36332e;font-size:12px;padding:8px 6vw;text-align:center}
.f-grid h4 span,.f-bottom{color:#524f49}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}