/* ============================================================
   WDELE — Base Styles(首页设计稿迁移版)
   源:_原始素材/site/index.html <style>(约 470 行)忠实迁移,
   去掉 reset 重复 + 未用组件(.lang/.grid-fp/.grid-res/cap-*),
   末尾追加工程必需件(skip-link / 页脚社交 / 模态占位说明 / focus)。
   设计变量走 tokens.css 同源 shorthand(--red/--ink/...),
   定稿只改 tokens.css 一处即全局生效。
   ============================================================ */

/* ---------- 布局容器 / 区块 ---------- */
.wrap{max-width:1240px;margin:0 auto;padding:0 48px}
section{position:relative}
.sec{padding:100px 0}
.sec-tint{background:var(--bg-2)}

/* ---------- breadcrumb(全站统一组件;收敛自 series/oem/about/blog.css,含修复 applications 缺口) ---------- */
.bcrumb{padding:20px 0 4px}
.bcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--mut)}
.bcrumb li{display:flex;align-items:center;gap:8px}
.bcrumb li+li::before{content:"›";color:#c3c9d3}
.bcrumb a:hover{color:var(--red)}
.bcrumb .cur{color:var(--ink);font-weight:600}

/* ---------- 区块头 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--red);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--red)}
.sec-head{margin-bottom:52px}
.sec-head.center{text-align:center}
.sec-head.center .eyebrow::after{content:"";width:22px;height:2px;background:var(--red)}
.sec-head.center .eyebrow::before{display:none}

/* ---------- 标题 ---------- */
h1,h2,h3,h4{line-height:1.16;letter-spacing:-.015em;font-weight:800}
h1{font-size:clamp(36px,4.6vw,58px);line-height:1.08}
h2.sect{font-size:clamp(28px,3vw,40px);margin:14px 0 0}
.sect-sub{color:var(--mut);font-size:17px;margin:16px 0 0;max-width:720px}
.center .sect-sub{margin-left:auto;margin-right:auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:700;font-size:14px;letter-spacing:.03em;
  padding:13px 26px;border-radius:var(--radius);
  border:1px solid transparent;cursor:pointer;
  transition:background .18s,border-color .18s,color .18s,transform .18s,box-shadow .18s;
  white-space:nowrap;
}
.btn svg{flex:none}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark);box-shadow:0 8px 20px rgba(216,44,5,.28)}
.btn-ghost{background:#fff;border-color:#cbd3de;color:var(--ink)}
.btn-ghost:hover{border-color:var(--red);color:var(--red)}
.btn-dark{background:#fff;color:var(--ink)}
.btn-dark:hover{box-shadow:0 8px 22px rgba(255,255,255,.16)}
.btn-ghost-w{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost-w:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-lg{padding:16px 32px;font-size:15px}
.btn:active{transform:translateY(1px)}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s;
}
.site-head.scrolled{box-shadow:0 4px 18px rgba(16,24,40,.06)}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:76px}
.brand-lock{display:flex;align-items:center;gap:14px;min-width:0}
.brand-lock .brand{min-width:0}
.brand{display:flex;flex-direction:column;gap:2px;line-height:1;align-items:flex-start}
.brand img{height:30px;width:auto;max-height:32px;flex:none}
.brand small{font-size:10px;font-weight:500;letter-spacing:.02em;text-transform:none;max-width:330px;line-height:1.35;margin-top:2px}

.nav{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;margin-left:auto}
.nav>li{position:relative}
.nav>li>a{
  display:block;padding:10px 12px;font-size:14px;font-weight:600;color:var(--ink);
  border-radius:var(--radius);transition:color .15s;white-space:nowrap;
}
.nav>li>a:hover,.nav>li:hover>a{color:var(--red)}
.nav .has-dd>.dd{position:absolute;top:100%;left:0;padding-top:10px;display:none}
.nav .has-dd:hover>.dd{display:block}
.dd-in{
  width:min(640px,94vw);min-width:0;
  background:#fff;border:1px solid var(--line);border-radius:8px;
  box-shadow:var(--shadow-lg);padding:10px;
  display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;
}
/* Products 下拉行 = 左主图瓦(series.image_path,视觉同下方 Applications mega 的 .mega-thumb)
   + 右名称/副标题两行。条目区 .dd-grid 独立滚动,「All products →」常驻底部
   —— 11 系列带图后行高翻倍,长屏不足时只收口列表,不裁掉出口链接。 */
.dd-in.dd-prod-in{width:min(760px,94vw);display:flex;flex-direction:column}
.dd-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;
  max-height:62vh;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
.dd-it{display:flex;align-items:center;gap:11px;padding:8px 12px;border-radius:8px;white-space:normal}
.dd-thumb{width:48px;height:48px;flex:none;border-radius:8px;object-fit:cover;overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2)}
.dd-thumb.ph{display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,#fff 0%,var(--bg-2) 58%,#fdeeea 100%);
  color:rgba(216,44,5,.30);font-size:11px;font-weight:800;letter-spacing:-.01em}
.dd-copy{display:flex;flex-direction:column;gap:2px;min-width:0}
.dd-it .dd-t{font-weight:700;font-size:13.5px;color:var(--ink);letter-spacing:-.01em;line-height:1.3}
.dd-it .dd-d{font-size:12px;font-weight:400;color:var(--mut);line-height:1.4;margin-top:1px}
.dd-it:hover{background:var(--bg-2)}
.dd-it:hover .dd-t{color:var(--red)}
.dd-in .dd-all{grid-column:1/-1;color:var(--red);font-weight:700;border-top:1px solid var(--line);margin-top:4px;padding-top:9px}

/* ---------- Applications header mega dropdown(全站 header;#03/#04 库驱动) ----------
   3×3 卡片流:每卡 = 场景微缩略图(image_path 空 → CSS 序号占位瓦,不出 <img>/不引假 /assets)
   + 库标题,整卡 <a> → /applications#<code>;导航层零 WD-* 编码(型号推荐留在落地页正文)。
   卡片流整体居中于 Applications 导航项下方(仅 >1100px 显示,见 @media nav 收起断点)。 */
.nav .has-dd-mega>.dd{left:50%;right:auto;transform:translateX(-50%)}
.dd-in.dd-mega-in{width:min(860px,92vw);display:flex;flex-direction:column;padding:12px 14px 10px}
.mega-head{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 6px 10px;border-bottom:1px solid var(--line)}
.mega-eyebrow{display:inline-flex;align-items:center;gap:8px;
  font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.mega-eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--red);flex:none}
.mega-view{font-size:12.5px;font-weight:800;color:var(--red);white-space:nowrap}
.mega-view:hover{color:var(--red-dark)}
.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;padding-top:6px;
  max-height:56vh;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
.mega-card{display:flex;align-items:center;gap:12px;min-width:0;min-height:66px;
  padding:8px;border-radius:9px;transition:background .15s}
.mega-card:hover{background:var(--bg-2)}
.mega-thumb{width:48px;height:48px;flex:none;border-radius:8px;object-fit:cover;overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2)}
.mega-thumb.ph{display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,#fff 0%,var(--bg-2) 58%,#fdeeea 100%);
  color:rgba(216,44,5,.30);font-size:19px;font-weight:800;letter-spacing:.03em}
.mega-name{font-size:13px;font-weight:700;line-height:1.32;color:var(--ink);min-width:0}
.mega-card:hover .mega-name{color:var(--red)}
.mega-oem{margin-top:4px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 6px 0}
.mega-oem-t{font-size:12.5px;color:var(--mut)}
.mega-oem-l{font-size:12.5px;font-weight:800;color:var(--ink);white-space:nowrap}
.mega-oem-l:hover{color:var(--red)}

.head-right{display:flex;align-items:center;gap:14px}
.head-quote{padding:11px 20px}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:9px 10px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0;transition:.2s}
.burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:1100px){.brand-lock{gap:12px}}
@media (max-width:620px){.brand small{display:none}}

/* mobile drawer */
.drawer{
  position:fixed;inset:0;z-index:60;background:rgba(10,15,25,.4);
  opacity:0;pointer-events:none;transition:opacity .2s;
}
.drawer.open{opacity:1;pointer-events:auto}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(360px,88vw);
  background:#fff;box-shadow:var(--shadow-lg);
  transform:translateX(102%);transition:transform .25s ease;
  display:flex;flex-direction:column;overflow:auto;
}
.drawer.open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-head .brand small{display:none}
.drawer-nav{padding:14px 10px;flex:1}
.drawer-nav a,.drawer-nav .d-sub{
  display:block;padding:11px 14px;font-weight:600;font-size:15px;color:var(--ink);border-radius:6px;
}
.drawer-nav a:hover{background:var(--bg-2);color:var(--red)}
.drawer-nav .d-sub{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mut);margin-top:8px;font-weight:700}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ---------- hero ---------- */
.hero{background:var(--bg);padding:56px 0 72px;border-bottom:1px solid var(--line)}
.hero-in{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--red);
  margin-bottom:18px;
}
.hero-eyebrow .pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--red);flex:none;animation:pulseDot 2.2s ease-in-out infinite}
@keyframes pulseDot{0%,100%{box-shadow:0 0 0 0 rgba(216,44,5,.35)}55%{box-shadow:0 0 0 7px rgba(216,44,5,0)}}
.hero h1{font-size:clamp(32px,3.5vw,44px);line-height:1.14;letter-spacing:-.02em;max-width:620px;margin:0 0 18px}
.hero-sub{color:var(--mut);font-size:clamp(15.5px,1.3vw,18px);max-width:560px;margin-bottom:28px}
.hero-sub strong{color:var(--ink);font-weight:700}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-trust-bar{
  display:flex;align-items:center;background:var(--bg-2);
  border:1px solid var(--line);border-radius:8px;padding:15px 18px;max-width:600px;
}
.trust-item{flex:1;min-width:0}
.trust-value{font-size:13.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em;line-height:1.2}
.trust-label{font-size:11px;color:var(--mut);margin-top:4px;line-height:1.35}
.trust-divider{width:1px;height:32px;background:#cbd5e1;margin:0 15px;flex:none}
.hero-media{position:relative}
.hero-media .frame{
  position:relative;overflow:hidden;border-radius:10px;background:var(--bg-2);
  aspect-ratio:6/5;
}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center}

/* ---------- product categories (snap carousel) ---------- */
.grid-cat{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.car{position:relative}
.car-viewport{overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.car-viewport::-webkit-scrollbar{display:none}
/* 各翻页独立按自身内容取高:勿改回 align-items:stretch。末页卡片不足 2 行
   (10 系列 = 8+2)时,页会被拉成与首页等高,grid 自动行随 align-content 默认
   stretch 纵向涨高 → 剩余卡片被纵向拉升。 */
.car-track{display:flex;align-items:flex-start}
.car-page{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;flex:0 0 100%;scroll-snap-align:start;align-content:flex-start}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;
  display:flex;flex-direction:column;color:inherit;text-decoration:none;
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d9dee7}
/* 系列卡图窗:1:1 方形底板 + contain(与系列页 hero/.fp-media 产品图同口径)。
   源图多为 800×800 方图(仅 wd-t 750×1000 竖图):方形框内方图满幅整图、无裁切;
   竖图等高居中留底板。4:3+cover 会上下/左右切图,4:3+contain 又把整图缩得太小,
   方框是"图尽量大且完整"的折中。满幅图不做 hover 放大(放大必裁图),卡片上浮即可。 */
.cat-media{aspect-ratio:1/1;overflow:hidden;background:var(--bg-2)}
.cat-media img{width:100%;height:100%;object-fit:contain}
.cat-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.cat-body h3{font-size:17px;font-weight:700;letter-spacing:-.01em}
.cat-body p{font-size:13.5px;color:var(--mut);line-height:1.5;flex:1}
.card-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:10px;
  font-size:13.5px;font-weight:700;color:var(--red);
}
.card-link svg{transition:transform .18s}
.cat-card:hover .card-link svg{transform:translateX(4px)}

.car-ui{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:30px}
.car-arrow{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex:none;
  transition:border-color .18s,color .18s,box-shadow .18s;
}
.car-arrow svg{width:18px;height:18px}
.car-arrow:hover:not(:disabled){border-color:var(--red);color:var(--red)}
.car-arrow:disabled{opacity:.35;cursor:default}
.car-dots{display:flex;align-items:center;gap:9px}
.car-dot{
  width:9px;height:9px;padding:0;border:none;border-radius:50%;background:#cbd5e1;cursor:pointer;
  transition:background .2s,width .25s;
}
.car-dot:hover{background:#94a3b8}
.car-dot.is-active{width:22px;border-radius:6px;background:var(--red)}

/* ---------- home → 专题页整块热区(整块可点跳专题页锚点) ---------- */
.bl-hit{position:absolute;inset:0;z-index:2;cursor:pointer}
.bl-hit:focus-visible{outline:3px solid var(--red);outline-offset:-4px}

/* ---------- applications ---------- */
.app-compact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app-card{
  display:block;color:inherit;text-decoration:none;
  position:relative;height:280px;border-radius:10px;overflow:hidden;cursor:pointer;
  background:var(--dark-2);box-shadow:0 4px 14px rgba(15,23,42,.06);
}
.app-card:focus-visible{outline:3px solid var(--red);outline-offset:-3px}
.app-card.app-nophoto{background:linear-gradient(165deg,rgba(255,138,112,.1),transparent 46%),var(--dark-2)}
.app-card-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  transition:transform .5s cubic-bezier(.16,1,.3,1);
}
.app-card:hover .app-card-bg,.app-card:focus-within .app-card-bg{transform:scale(1.06)}
.app-card-overlay{
  position:absolute;left:0;right:0;bottom:0;padding:16px 20px 18px;
  background:linear-gradient(180deg,rgba(15,23,42,.18) 0%,rgba(15,23,42,.6) 55%,rgba(15,23,42,.96) 100%);
  display:flex;flex-direction:column;
  transition:background .3s ease;
}
.app-card:hover .app-card-overlay,.app-card:focus-within .app-card-overlay{
  background:linear-gradient(180deg,rgba(13,20,36,.86) 0%,rgba(13,20,36,.97) 100%);
}
.app-card-overlay>*{order:1}
.app-card-overlay .app-card-header{order:2}
.app-card-header h3{font-size:20px;font-weight:800;color:#fff;line-height:1.2;margin:0}
.app-card-body{
  max-height:0;opacity:0;overflow:hidden;transform:translateY(8px);
  transition:max-height .4s cubic-bezier(.16,1,.3,1),opacity .3s ease .06s,transform .3s ease .06s;
}
.app-card:hover .app-card-body,.app-card:focus-within .app-card-body{max-height:240px;opacity:1;transform:translateY(0)}
.app-card-body p{font-size:13px;line-height:1.55;color:#d7dee9;margin:10px 0 14px}
.app-more{display:flex;justify-content:center;margin-top:36px}

/* ---------- why wandu ---------- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.why-item{padding:6px 0 0}
.why-num{font-size:13px;font-weight:800;color:var(--red);letter-spacing:.08em}
.why-item h3{font-size:19px;font-weight:700;margin:14px 0 8px}
.why-item p{font-size:14.5px;color:var(--mut);line-height:1.6}
.why-item .rule{width:34px;height:3px;background:var(--red);border-radius:2px;margin-top:2px}

/* ---------- OEM / ODM ---------- */
.oem{background:var(--dark);color:#fff;overflow:hidden}
.oem-in{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.oem-media{position:relative;border-radius:10px;overflow:hidden;background:rgba(255,255,255,.04)}
.oem-media img{display:block;width:100%;height:auto}
.oem-copy .eyebrow{color:#ff8a70}.oem-copy .eyebrow::before{background:#ff8a70}
.oem-copy h2.sect{color:#fff}
.oem-copy .sect-sub{color:#aeb7c7}
.opt-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;margin:26px 0 30px}
.opt-grid li{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:500;color:#dfe4ec}
.opt-grid svg{flex:none;color:#ff8a70}
.oem-cta{display:flex;gap:14px;flex-wrap:wrap}
/* 整块热区(.bl-hit)下不拦交互:弹窗按钮/文字链提到热区之上 */
#oem .btn,.oem-more .card-link{position:relative;z-index:3}
/* 首页 #oem 区块 → 独立 OEM/ODM 工程页入口(深底亮橙文字链) */
.oem-more{margin:20px 0 0}
.oem-more .card-link{color:#ffb09a}
.oem-more .card-link:hover{color:#fff}

/* ---------- factory ---------- */
.fact-shot{margin:0;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.fact-shot img{display:block;width:100%;height:auto}

/* ---------- compliance & certifications ---------- */
.cert-split{display:grid;grid-template-columns:1fr 1.12fr;gap:60px;align-items:center}
.cert-list{margin:22px 0 28px}
.cert-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink);line-height:1.55;margin-bottom:13px}
.cert-list li svg{flex:none;margin-top:3px;color:var(--red)}
.cert-list strong{font-weight:700}
.cert-note{font-size:12px;color:var(--mut);margin-top:16px;display:flex;gap:6px;align-items:flex-start}
/* 整块热区不拦 audit 弹窗按钮 */
.cert-action .btn{position:relative;z-index:3}
.cert-note svg{flex:none;color:var(--red);margin-top:2px}
.cert-fig{margin:0;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.cert-fig img{display:block;width:100%;height:auto}

/* ---------- final CTA ---------- */
.final{background:var(--dark);color:#fff;text-align:center;padding:96px 0}
.final h2{font-size:clamp(28px,3.4vw,46px);color:#fff}
.final .sect-sub{color:#aeb7c7;margin:18px auto 0;font-size:16.5px}
.final-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:36px}
.final-aud{margin-top:34px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#6f7a90;font-weight:600}

/* ---------- footer ---------- */
.foot{background:#0b1320;color:#cbd3df;padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.25fr 1.15fr 1.2fr .95fr;gap:40px;padding:44px 0 50px}
.foot h4{color:#fff;font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:18px}
.foot ul li{margin-bottom:10px;line-height:1.45}
.foot ul a{font-size:14px;color:#aab3c2;transition:color .15s}
.foot ul a:hover{color:#fff}
.foot-contact{display:flex;flex-direction:column}
.foot-contact li{display:flex;flex-direction:column;gap:2px;margin-bottom:13px;line-height:1.45}
.foot-contact .fc-k{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#7c8698}
.foot-contact .fc-v{font-size:13.5px;color:#dbe1ea;line-height:1.55}
.foot-contact .fc-v a{font-size:inherit}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0;font-size:13px;color:#7c8698;border-top:1px solid rgba(255,255,255,.08);
}
.foot-bottom a{color:#aab3c2}
.foot-bottom a:hover{color:#fff}
.foot-bottom p{color:#7c8698;font-size:13px;line-height:1.5}

/* 页脚社交图标(settings 任一非空才渲染) */
.foot-social{display:flex;gap:10px;margin-top:16px}
.foot-social .social-link{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:rgba(255,255,255,.08);color:#fff;
  transition:background .18s,transform .18s;
}
.foot-social .social-link:hover{background:var(--red);transform:translateY(-2px)}
.foot-social .social-link svg{width:16px;height:16px}

/* ---------- reveal on scroll ---------- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
.rv-d1{transition-delay:.05s}.rv-d2{transition-delay:.12s}.rv-d3{transition-delay:.19s}

/* ---------- modal (全局在 base) ---------- */
.modal{
  position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;padding:20px;
  background:rgba(10,15,25,.55);opacity:0;pointer-events:none;transition:opacity .2s;
}
.modal.open{opacity:1;pointer-events:auto}
.modal-box{
  background:#fff;border-radius:12px;width:min(560px,100%);max-height:90vh;overflow:auto;
  box-shadow:var(--shadow-lg);transform:translateY(10px);transition:transform .22s;
}
.modal.open .modal-box{transform:none}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px 24px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff}
.modal-head h3{font-size:20px}
.modal-close{background:#f2f4f7;border:none;width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:18px;line-height:1;color:var(--ink);flex:none}
.modal-close:hover{background:#e7eaef}
.modal-body{padding:22px 24px 26px}
.kind-switch{display:flex;background:#eef1f5;border-radius:10px;padding:4px;margin-bottom:18px;gap:4px}
.kind-btn{flex:1;border:none;background:transparent;border-radius:8px;padding:9px 10px;font-size:13.5px;font-weight:700;color:#5b6472;cursor:pointer;transition:.15s;line-height:1.2}
.kind-btn:hover{color:var(--ink)}
.kind-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(15,23,42,.1)}
.hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}
.form-err{color:var(--red);font-size:13px;line-height:1.5;margin:0 0 12px}
.form-err:empty{display:none}
.f-row{margin-bottom:16px}
.f-row label{display:block;font-size:12.5px;font-weight:700;color:#344054;margin-bottom:6px}
.f-row input,.f-row select,.f-row textarea{
  width:100%;border:1px solid #d0d5dd;border-radius:6px;padding:11px 13px;font:inherit;font-size:14.5px;color:var(--ink);background:#fff;
}
.f-row input:focus,.f-row select:focus,.f-row textarea:focus{outline:2px solid rgba(216,44,5,.25);border-color:var(--red)}
.f-row textarea{resize:vertical;min-height:84px}
.f-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.f-file{border:1.5px dashed #cbd3de;border-radius:8px;padding:16px;text-align:center;cursor:pointer;transition:border-color .15s;background:var(--bg-2)}
.f-file:hover{border-color:var(--red)}
.f-file input{display:none}
.f-file b{display:block;font-size:13.5px;color:var(--ink);font-weight:600}
.f-file span{font-size:12px;color:var(--mut)}
.modal-ok{text-align:center;padding:34px 10px 26px}
.modal-ok .ok-ico{width:58px;height:58px;border-radius:50%;background:#e6f7ee;color:#0e7a46;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.modal-ok h4{font-size:19px;margin-bottom:8px}
.modal-ok p{color:var(--mut);font-size:14.5px;max-width:400px;margin:0 auto}
.modal-ok .btn{margin-top:22px}

/* ---------- 可搜索下拉(国家字段;listbox 由 site.js 填充,无 JS 时 .combo-list[hidden] 恒不可见) ---------- */
.combo{position:relative}
.combo-list{
  position:absolute;z-index:2;top:calc(100% + 4px);left:0;right:0;
  max-height:212px;overflow-y:auto;margin:0;padding:4px;list-style:none;
  background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow-lg);
}
.combo-list[hidden]{display:none}
.combo-it{padding:9px 11px;border-radius:6px;font-size:14px;line-height:1.3;color:var(--ink);cursor:pointer}
.combo-it.is-on{background:var(--color-accent-soft);color:#ad2204}

/* ---------- mobile sticky cta ---------- */
.m-cta{display:none}

/* ---------- WhatsApp 悬浮快捷入口(全站右下角常显;纯 CSS,无 JS) ---------- */
/* z-index 55:高于页面内容(内容层最高 5),低于 drawer(60)/ .m-cta(70)/ modal(80)
   → 移动抽屉与全局弹窗打开时被遮罩盖住。移动端已上移避开底部条,故无需与 .m-cta 争层级。 */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:55;display:flex;align-items:center}

/* 绿球:复用 tokens.css 早已定义、此前全站零引用的品牌色令牌。 */
.wa-float-ico{
  flex:none;width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--color-whatsapp);color:#fff;margin-left:0;
  box-shadow:0 6px 20px rgba(16,24,40,.22);
  transition:margin-left .24s ease,background .18s,box-shadow .18s,transform .18s;
}
.wa-float-ico svg{width:28px;height:28px}

/* 标签胶囊:白底深字,而非白字压绿底(后者约 2.1:1,不达 WCAG AA)。
   收起态用 max-width:0 + opacity(display 不可过渡);reset.css 的 border-box 保证连 padding/边框一起收干净。
   与绿球的间距走 .wa-float-ico 的 margin-left 而非父级 gap —— gap 收起后仍会留一段空档。 */
.wa-float-txt{
  max-width:0;opacity:0;overflow:hidden;white-space:nowrap;
  padding:11px 0;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--ink);
  font-size:13.5px;font-weight:700;line-height:1;letter-spacing:.01em;
  box-shadow:0 6px 20px rgba(16,24,40,.14);
  transition:max-width .24s ease,opacity .18s ease,padding .24s ease;
}

/* 展开触发::focus-visible 始终生效(键盘可达);:hover 限真悬停设备,
   免得触屏 tap 后的「粘滞 hover」把标签卡在展开态。聚焦外框走全局 a:focus-visible 约定。 */
.wa-float:focus-visible .wa-float-txt{max-width:220px;opacity:1;padding:11px 16px}
.wa-float:focus-visible .wa-float-ico{margin-left:10px}
@media (hover:hover) and (pointer:fine){
  .wa-float:hover .wa-float-txt{max-width:220px;opacity:1;padding:11px 16px}
  .wa-float:hover .wa-float-ico{margin-left:10px;background:var(--color-whatsapp-hover);box-shadow:0 10px 26px rgba(16,24,40,.28)}
}
.wa-float:active .wa-float-ico{transform:translateY(1px)}

@media (max-width:760px){
  /* 抬到 .m-cta 底部条(≈68px 高)上方;env() 与 .m-cta 同口径(base.html viewport 未开 cover 时恒为 0)。 */
  .wa-float{right:16px;bottom:calc(80px + env(safe-area-inset-bottom))}
  .wa-float-ico{width:52px;height:52px}
  .wa-float-ico svg{width:26px;height:26px}
}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .grid-cat,.car-page{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .app-compact-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .oem-in{grid-template-columns:1fr;gap:40px}
  .oem .oem-media{order:-1}
  .nav{display:none}
  .burger{display:inline-block}
  .hero-in{grid-template-columns:1fr;gap:44px}
  .hero-media{max-width:640px}
  .cert-split{grid-template-columns:1fr;gap:44px}
}
@media (max-width:760px){
  .wrap{padding:0 20px}
  .sec{padding:68px 0}
  html{scroll-padding-top:64px}
  .head-in{height:64px}
  .brand img{height:22px}
  .head-quote{display:none}
  .hero{padding:36px 0 56px}
  .hero-trust-bar{flex-direction:column;align-items:stretch;gap:11px;padding:16px 18px}
  .trust-divider{display:none}
  .grid-cat,.car-page{grid-template-columns:repeat(2,1fr);gap:14px}
  .cat-body{padding:13px 14px 15px}
  .cat-body h3{font-size:14.5px}
  .app-compact-grid{grid-template-columns:1fr}
  .app-card-overlay{background:linear-gradient(180deg,rgba(13,20,36,.55) 0%,rgba(13,20,36,.96) 100%)}
  .app-card-body{max-height:none;opacity:1;transform:none}
  .why-grid{grid-template-columns:1fr;gap:30px}
  .opt-grid{grid-template-columns:1fr}
  .foot{padding-top:52px}
  /* 4 列 → 2 列(库驱动长文案:缩小列距与字号,避免窄列里碎行) */
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:30px 20px;padding:36px 0 40px}
  .foot ul a{font-size:13.5px}
  /* bottom sticky cta */
  body{padding-bottom:64px}
  .m-cta{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:var(--bg);border-top:1px solid var(--line);padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  }
  .m-cta .btn{width:100%;padding:14px}
}
@media (min-width:761px){body{padding-bottom:0}}

/* ============================================================
   工程补充件(设计稿无,框架必需)
   ============================================================ */

/* 无障碍跳转链接 */
.skip-link {
  position:absolute;
  top:-48px; left:16px;
  z-index:1000;
  padding:8px 16px;
  background:var(--color-primary);
  color:#fff;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
  transition:top var(--transition-fast);
}
.skip-link:focus{top:0}

/* 键盘可见焦点(全局) */
a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,.drawer .brand:focus-visible{
  outline:2px solid var(--red);outline-offset:2px;
}
.burger:focus-visible,.car-dot:focus-visible{outline-offset:3px}

/* 无 JS 时滚动显现元素不得隐藏(reveal 由 IntersectionObserver 触发) */
.no-js .rv{opacity:1;transform:none}

/* ---------- 专题页首屏照片底(选填;后台「素材资源」上传,无图不加 .hero-photo → 保持现有深色设计) ---------- */
.hero-photo{position:relative;overflow:hidden}
.hero-photo>.hero-photo-bg{position:absolute;inset:0;z-index:0;
  background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-photo>.hero-photo-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(16,24,40,.9) 0%,rgba(16,24,40,.66) 42%,rgba(16,24,40,.28) 100%)}
.hero-photo>.wrap{position:relative;z-index:1}