/* ==========================================================================
   XGN Explosion-Proof — front page
   ========================================================================== */

:root{
  --ink:#070b12;
  --ink-2:#0b1220;
  --ink-3:#0f1728;
  --paper:#f4f5f7;
  --paper-2:#eceef2;
  --accent:#ff6b1a;
  --accent-2:#ffa64d;
  --accent-dim:rgba(255,107,26,.12);
  --txt:#e9eef7;
  --muted:#93a1b5;
  --muted-2:#6d7c92;
  --line:rgba(148,163,184,.16);
  --line-strong:rgba(148,163,184,.28);
  --ink-txt:#0b1220;
  --ink-muted:#55637a;
  --r:16px;
  --r-lg:22px;
  --ease:cubic-bezier(.16,1,.3,1);
  --head-h:78px;
  /* 全屏宽度：内容铺满视口，仅保留自适应的左右安全边距 */
  --max:100%;
  --gut:clamp(20px,3.6vw,64px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden}
body.xgn-body{
  margin:0;background:var(--ink);color:var(--txt);
  font-family:"Inter","Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.65;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.xgn-body img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.025em;line-height:1.08}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
section[id]{scroll-margin-top:calc(var(--head-h) + 18px)}
.admin-bar section[id]{scroll-margin-top:calc(var(--head-h) + 48px)}

.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;z-index:999}
.skip:focus{left:12px;top:12px}

.progress{position:fixed;inset:0 0 auto;height:2px;background:transparent;z-index:120;pointer-events:none}
.progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2))}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 24px;border-radius:999px;font-size:14.5px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;transition:transform .35s var(--ease),background .25s,color .25s,border-color .25s,box-shadow .35s;
  white-space:nowrap;
}
.btn--accent{background:var(--accent);color:#0a0f18;box-shadow:0 10px 30px -12px rgba(255,107,26,.75)}
.btn--accent:hover{background:#ff7d35;transform:translateY(-2px);box-shadow:0 18px 40px -14px rgba(255,107,26,.85)}
.btn--outline{border-color:var(--line-strong);color:var(--txt)}
.btn--outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn--ghost{border-color:var(--line);color:var(--muted)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn--sm{padding:10px 18px;font-size:13.5px}
.btn--block{width:100%;margin-top:4px}

.link{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14.5px;color:var(--accent)}
.link span{transition:transform .3s var(--ease)}
.link:hover span{transform:translateX(5px)}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:20px;
  font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,107,26,.15)}

.ticklist{display:grid;gap:9px;margin-top:18px}
.ticklist li{position:relative;padding-left:24px;font-size:14.5px;color:var(--muted)}
.ticklist li::before{
  content:"";position:absolute;left:0;top:.55em;width:12px;height:7px;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(-45deg) translateY(-2px);
}

/* ---------- header ---------- */
.head{
  position:fixed;top:0;left:0;right:0;z-index:100;
  border-bottom:1px solid transparent;transition:background .35s,border-color .35s,backdrop-filter .35s;
}
.admin-bar .head{top:32px}
.head.is-stuck{background:rgba(7,11,18,.86);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.head__inner{
  max-width:var(--max);margin:0 auto;padding:0 var(--gut);height:var(--head-h);
  display:flex;align-items:center;gap:26px;
}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand__mark{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:rgba(255,107,26,.09);color:var(--accent);border:1px solid rgba(255,107,26,.25)}
.brand__text{display:flex;flex-direction:column;line-height:1.05}
.brand__text strong{font-size:19px;font-weight:750;letter-spacing:.06em}
.brand__text em{font-style:normal;font-size:9.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted-2);margin-top:3px}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav__item{position:relative}
.nav__link{
  display:inline-flex;align-items:center;gap:6px;padding:10px 13px;border-radius:9px;
  font-size:14px;font-weight:500;color:#c3ccdb;transition:color .2s,background .2s;
}
.nav__link:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav__cta{display:none;margin-left:6px}

.megamenu{
  position:absolute;top:calc(100% + 14px);left:-14px;width:420px;
  background:rgba(12,18,32,.97);border:1px solid var(--line);border-radius:16px;padding:10px;
  display:grid;gap:2px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
  box-shadow:0 30px 60px -25px rgba(0,0,0,.9);
}
.nav__item--has-menu.is-open .megamenu{opacity:1;visibility:visible;transform:none}
.megamenu a{display:block;padding:11px 13px;border-radius:10px;transition:background .2s}
.megamenu a:hover{background:rgba(255,255,255,.05)}
.megamenu b{display:block;font-size:14px;font-weight:600;color:#fff}
.megamenu span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.megamenu__all{border-top:1px solid var(--line);margin-top:6px;padding-top:12px!important;color:var(--accent);font-size:13.5px;font-weight:600}

.head__cta{margin-left:10px}

.burger{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);margin-left:auto;position:relative}
.burger span{position:absolute;left:11px;width:20px;height:1.6px;background:#dfe6f2;transition:transform .3s var(--ease),opacity .2s}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:20px}
.burger span:nth-child(3){top:25px}
.head.is-open .burger span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.head.is-open .burger span:nth-child(2){opacity:0}
.head.is-open .burger span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:calc(var(--head-h) + 72px) 0 84px;overflow:hidden}

/* 全屏产品图背景版 hero */
.hero--photo{
  display:flex;align-items:center;
  min-height:min(94vh,940px);
  padding:calc(var(--head-h) + 64px) 0 76px;
  background:#070b12;
}
.hero__photo{position:absolute;inset:0;z-index:0}
.hero__photo picture{display:block;width:100%;height:100%}
.hero__photo img{
  display:block;width:100%;height:100%;
  object-fit:cover;object-position:62% center;
  transform:scale(1.015);
  /* 压暗后补一点对比与饱和，避免金属件发灰 */
  filter:brightness(1.05) contrast(1.06) saturate(1.12);
}
/* 左实右虚的遮罩：保证文字对比度，同时让产品图右侧透出来 */
.hero__scrim{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,#070b12 0%,rgba(7,11,18,.97) 18%,rgba(7,11,18,.93) 32%,rgba(7,11,18,.72) 48%,rgba(7,11,18,.45) 66%,rgba(7,11,18,.22) 84%,rgba(7,11,18,.14) 100%),
    linear-gradient(180deg,rgba(7,11,18,.9) 0%,rgba(7,11,18,.3) 14%,rgba(7,11,18,.14) 34%,rgba(7,11,18,.3) 58%,rgba(7,11,18,.72) 82%,#070b12 100%);
}
.hero--photo .eyebrow{color:#aebccd}
.hero__inner.hero__inner--solo{position:relative;z-index:2;display:block}
.hero__inner--solo .hero__copy{max-width:840px}
.hero--photo .hero__copy h1,
.hero--photo .lede{text-shadow:0 2px 24px rgba(4,7,12,.55)}
.hero--photo .stats{margin-top:42px}

.hero__bg{position:absolute;inset:0;z-index:0}
.hero__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(to right,rgba(148,163,184,.075) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(148,163,184,.075) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(circle at 62% 38%,#000 5%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 62% 38%,#000 5%,transparent 72%);
}
.hero__glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.hero__glow--1{width:620px;height:620px;right:-140px;top:-120px;background:radial-gradient(circle,rgba(255,107,26,.30),transparent 66%)}
.hero__glow--2{width:520px;height:520px;left:-200px;bottom:-220px;background:radial-gradient(circle,rgba(56,120,220,.20),transparent 68%)}

.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero__copy h1{font-size:clamp(38px,4.6vw,66px);font-weight:680;letter-spacing:-.035em}
.hero__copy .hl{color:var(--accent);position:relative;display:inline-block}
.hero__copy .hl::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.11em;
  background:rgba(255,107,26,.22);border-radius:2px;
}
.lede{margin-top:24px;max-width:56ch;font-size:16.5px;color:#b9c4d4}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:46px 0 0;padding-top:30px;border-top:1px solid var(--line)}
.stats dt{font-size:clamp(26px,2.6vw,34px);font-weight:700;letter-spacing:-.02em;color:#fff;font-variant-numeric:tabular-nums}
.stats dd{margin:6px 0 0;font-size:12.5px;line-height:1.4;color:var(--muted)}

/* 全屏下限制主图最大宽度，避免图片被放大导致糊边 */
.hero__media{position:relative;padding:16px 0 16px 26px;max-width:680px;margin-left:auto;width:100%}
.hero__card{position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;background:#fff;border:1px solid rgba(255,255,255,.1)}
.hero__card img{width:100%}
.hero__card--main{box-shadow:0 40px 90px -40px rgba(0,0,0,.9);animation:floaty 9s ease-in-out infinite}
.hero__card figcaption{
  position:absolute;left:auto;right:14px;top:14px;bottom:auto;display:flex;align-items:center;gap:10px;
  padding:8px 12px;border-radius:10px;background:rgba(255,255,255,.94);border:1px solid rgba(15,23,36,.1);
  box-shadow:0 10px 24px -14px rgba(15,23,36,.45);
  font-size:12.5px;color:#41506a;
}
.tag{font-size:11px;font-weight:700;letter-spacing:.08em;color:#0a0f18;background:var(--accent);padding:3px 8px;border-radius:5px}
.hero__card-meta{color:#41506a}
.hero__sub{
  display:flex;align-items:center;gap:12px;margin-top:14px;padding:10px 14px 10px 10px;
  border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.035);
  transition:border-color .25s,background .25s,transform .25s;
}
.hero__sub:hover{border-color:rgba(255,107,26,.4);background:rgba(255,107,26,.06);transform:translateY(-2px)}
.hero__sub-thumb{flex:none;width:56px;height:56px;border-radius:10px;overflow:hidden;background:#fff;display:grid;place-items:center}
.hero__sub-thumb img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero__sub-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.hero__sub-text b{font-size:13.5px;font-weight:650;color:#e7edf7;letter-spacing:.01em}
.hero__sub-text em{font-style:normal;font-size:11.5px;color:var(--muted);line-height:1.4}
.hero__sub-arrow{margin-left:auto;color:var(--accent);font-size:16px;flex:none}
.hero__chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px;position:relative;z-index:2}
.chip{display:inline-flex;align-items:center;gap:7px;padding:6px 11px;border-radius:999px;border:1px solid var(--line);font-size:11.5px;color:#a9b7ca;letter-spacing:.02em}
.chip--live i{width:6px;height:6px;border-radius:50%;background:#37d67a;box-shadow:0 0 0 3px rgba(55,214,122,.18)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ---------- trust ---------- */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.015);overflow:hidden;padding:15px 0}
.trust__track{display:flex;gap:44px;width:max-content;animation:marquee 42s linear infinite;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:#8c9ab0;white-space:nowrap}
.trust__track span{display:inline-flex;align-items:center;gap:8px}
.trust__track em{font-style:normal;color:#5f6e85}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- section shell ---------- */
.sec{padding:clamp(72px,8vw,124px) 0;position:relative}
.sec__head{max-width:820px;margin-bottom:54px}
.sec__head h2{font-size:clamp(28px,3.4vw,44px)}
.sec__head--split{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:end;max-width:none}
.sec__head--split .sec__lede{margin-top:0}
.sec__lede{margin-top:20px;font-size:15.5px;line-height:1.7;color:var(--muted)}

/* light sections */
.finder,.quality,.compare,.company{background:var(--paper);color:var(--ink-txt)}
.finder .eyebrow,.quality .eyebrow,.compare .eyebrow,.company .eyebrow{color:var(--ink-muted)}
.finder .sec__lede,.quality .sec__lede,.compare .sec__lede,.company p,.company .facts dd{color:var(--ink-muted)}
.finder h2,.quality h2,.compare h2,.company h2,.company h3{color:var(--ink-txt)}
.quality .ticklist li,.company .ticklist li{color:var(--ink-muted)}
.quality .link{color:#d2530a}

/* ---------- focus ---------- */
.focus__grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.linecard{
  position:relative;display:grid;grid-template-columns:260px 1fr;gap:28px;
  padding:26px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  transition:border-color .35s,transform .45s var(--ease),background .35s;
}
.linecard:hover{border-color:rgba(255,107,26,.4);transform:translateY(-4px)}
.linecard__num{position:absolute;right:22px;top:16px;font-size:12px;font-weight:700;letter-spacing:.2em;color:#4a5a72}
.linecard__media{border-radius:14px;overflow:hidden;background:#fff;align-self:start}
.linecard__body h3{font-size:22px;margin-bottom:10px}
.linecard__body p{font-size:14.5px;color:var(--muted)}
.linecard__body .ticklist{margin-top:14px;margin-bottom:18px}
.linecard__body .ticklist li{font-size:13.5px}

/* ---------- finder ---------- */
.finder__bar{display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:26px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.fchip{
  padding:8px 14px;border-radius:999px;border:1px solid #d8dce3;background:#fff;
  font-size:13px;font-weight:500;color:#3b4759;transition:.22s;
}
.fchip span{color:#93a0b3;font-size:11.5px;margin-left:4px;font-variant-numeric:tabular-nums}
.fchip:hover{border-color:#b9c1cd}
.fchip.is-active{background:var(--ink-txt);border-color:var(--ink-txt);color:#fff}
.fchip.is-active span{color:rgba(255,255,255,.6)}
.search{display:flex;align-items:center;gap:9px;padding:0 15px;height:42px;border-radius:999px;background:#fff;border:1px solid #d8dce3;color:#7b8798}
.search input{border:0;outline:0;background:none;font-size:13.5px;width:230px;color:#1b2434}
.search input::placeholder{color:#9aa6b6}

.models{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.model{
  display:flex;flex-direction:column;gap:6px;padding:18px;border-radius:14px;
  background:#fff;border:1px solid #e2e5ea;transition:.28s var(--ease);
}
.model:hover{border-color:#b9c1cd;transform:translateY(-3px);box-shadow:0 18px 34px -24px rgba(11,18,32,.5)}
.model.is-hidden{display:none}
.model__top{display:flex;align-items:center;justify-content:space-between}
.model__code{font-size:15.5px;font-weight:700;letter-spacing:-.01em;color:#0b1220;font-variant-numeric:tabular-nums}
.model__arrow{color:#a9b3c1;transition:transform .28s var(--ease),color .28s}
.model:hover .model__arrow{transform:translateX(4px);color:var(--accent)}
.model__name{font-size:13px;color:#4d5b70;line-height:1.4}
.model__meta{font-size:11px;color:#98a3b3;letter-spacing:.03em;text-transform:uppercase;margin-top:auto;padding-top:8px}
.finder__empty{margin-top:26px;font-size:14px;color:var(--ink-muted)}
.finder__empty a{color:#d2530a;font-weight:600}

/* ---------- manufacturing ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;counter-reset:s;list-style:none;margin:0;padding:0}
.step{position:relative;padding:26px 24px;border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.025);transition:border-color .3s,background .3s}
.step:hover{border-color:rgba(255,107,26,.35);background:rgba(255,107,26,.045)}
.step__n{display:block;font-size:11px;font-weight:700;letter-spacing:.2em;color:var(--accent);margin-bottom:14px}
.step h3{font-size:16.5px;margin-bottom:9px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.6}

.mfg__notes{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin-top:18px}
.note{padding:24px;border-radius:var(--r);background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.014));border:1px solid var(--line)}
.note h3{font-size:15px;margin-bottom:8px;color:#fff}
.note p{font-size:13.5px;color:var(--muted)}

/* ---------- quality ---------- */
.qtabs{display:grid;grid-template-columns:290px 1fr;gap:26px;align-items:start}
.qtabs__list{display:grid;gap:8px}
.qtab{
  text-align:left;padding:15px 18px;border-radius:12px;border:1px solid #dfe3e9;background:#fff;
  font-size:14px;font-weight:600;color:#1f2a3b;transition:.25s;
}
.qtab span{display:block;font-size:11.5px;font-weight:400;color:#8b96a6;margin-top:2px}
.qtab:hover{border-color:#b9c1cd}
.qtab.is-active{background:var(--ink-txt);border-color:var(--ink-txt);color:#fff}
.qtab.is-active span{color:rgba(255,255,255,.55)}
.qtabs__panels{background:#fff;border:1px solid #e2e5ea;border-radius:var(--r-lg);padding:34px 36px;min-height:320px}
.qpanel h3{font-size:20px;margin-bottom:14px;color:#0b1220}
.qpanel p{font-size:15px;line-height:1.72;color:#4d5b70;max-width:82ch}
.qpanel[hidden]{display:none}

/* ---------- applications ---------- */
.apps__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.app{padding:26px 24px;border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.022);transition:.3s var(--ease)}
.app:hover{transform:translateY(-4px);border-color:rgba(255,107,26,.35);background:rgba(255,107,26,.04)}
.app svg{color:var(--accent);margin-bottom:16px}
.app h3{font-size:16.5px;margin-bottom:8px}
.app p{font-size:13.5px;color:var(--muted);line-height:1.62}

/* ---------- compare ---------- */
.tablewrap{overflow-x:auto;border:1px solid #dfe3e9;border-radius:var(--r-lg);background:#fff;-webkit-overflow-scrolling:touch}
.cmp{width:100%;border-collapse:collapse;min-width:720px;font-size:14px}
.cmp th,.cmp td{padding:16px 20px;text-align:left;border-bottom:1px solid #eceef2}
.cmp thead th{font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:#7c8798;background:#fafbfc;font-weight:600}
.cmp tbody th{font-weight:600;color:#1f2a3b;width:230px}
.cmp td{color:#5a6779}
.cmp .cmp__ours{background:#fff7f2;color:#0b1220;font-weight:500;position:relative}
.cmp thead .cmp__ours{color:#c04d0b;background:#fff1e8}
.cmp tr:last-child th,.cmp tr:last-child td{border-bottom:0}

/* ---------- quote ---------- */
.quote{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 60%,var(--ink) 100%)}
.quote__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:start}
.builder{padding:30px;border:1px solid var(--line);border-radius:var(--r-lg);background:rgba(255,255,255,.028)}
.builder__step{margin-bottom:22px}
.builder__label{display:block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);margin-bottom:10px}
.pills{display:flex;flex-wrap:wrap;gap:8px}
.pill{
  padding:9px 15px;border-radius:999px;border:1px solid var(--line);font-size:13px;color:#b6c2d3;
  transition:.22s;
}
.pill:hover{border-color:var(--line-strong);color:#fff}
.pill.is-active{background:var(--accent);border-color:var(--accent);color:#0a0f18;font-weight:600}
.builder__out{margin-top:8px;padding:18px;border-radius:14px;background:rgba(255,107,26,.07);border:1px solid rgba(255,107,26,.22)}
.builder__out-label{display:block;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-2);margin-bottom:7px}
.builder__out p{font-size:14px;color:#eaf0f9;line-height:1.55}
.builder__out .btn{margin-top:14px}

.qform{padding:30px;border:1px solid var(--line);border-radius:var(--r-lg);background:rgba(255,255,255,.035);backdrop-filter:blur(6px)}
.qform__row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.qform label{display:block;font-size:12px;color:#9fb0c6;margin-bottom:13px}
.qform label span{color:var(--accent)}
.qform input,.qform select,.qform textarea{
  display:block;width:100%;margin-top:6px;padding:12px 14px;border-radius:10px;
  border:1px solid var(--line);background:rgba(7,11,18,.55);color:#eaf0f9;font-size:14px;font-family:inherit;
  transition:border-color .2s,background .2s;outline:none;
}
.qform input:focus,.qform select:focus,.qform textarea:focus{border-color:var(--accent);background:rgba(7,11,18,.85)}
.qform textarea{resize:vertical;min-height:104px}
.qform select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#93a1b5 50%),linear-gradient(135deg,#93a1b5 50%,transparent 50%);background-position:calc(100% - 18px) 19px,calc(100% - 13px) 19px;background-size:5px 5px;background-repeat:no-repeat}
.qform input.invalid,.qform textarea.invalid{border-color:#ff5a5a}
.qform__note{margin-top:14px;font-size:11.5px;color:var(--muted-2);line-height:1.55}
.qform__status{margin-top:12px;font-size:13px;min-height:18px}
.qform__status.ok{color:#4ade80}
.qform__status.err{color:#ff7b7b}
.hp{position:absolute!important;left:-9999px!important;opacity:0;height:0;width:0}

/* ---------- company ---------- */
.company__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.company h2{font-size:clamp(28px,3.2vw,42px);margin-bottom:20px}
.company p{font-size:15.5px;line-height:1.72;margin-bottom:16px;max-width:56ch}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:30px;background:#dfe3e9;border:1px solid #dfe3e9;border-radius:14px;overflow:hidden}
.facts div{background:#fff;padding:18px 20px}
.facts dt{font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:#8b96a6;margin-bottom:5px}
.facts dd{margin:0;font-size:14px;font-weight:600;color:#1b2434;line-height:1.4}
.company__media{display:grid;grid-template-columns:1.25fr .75fr;gap:14px;align-items:end}
.company__media img{border-radius:16px;border:1px solid #e2e5ea;background:#fff}

/* ---------- faq ---------- */
.faq__grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:52px;align-items:start}
.faq h2{font-size:clamp(28px,3.2vw,42px)}
.acc{display:grid;gap:10px}
.acc__item{border:1px solid var(--line);border-radius:13px;background:rgba(255,255,255,.022);overflow:hidden;transition:border-color .25s,background .25s}
.acc__item[open]{border-color:rgba(255,107,26,.32);background:rgba(255,107,26,.04)}
.acc__item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:17px 20px;cursor:pointer;list-style:none;font-size:14.5px;font-weight:550;color:#e6edf7;
}
.acc__item summary::-webkit-details-marker{display:none}
.acc__item summary i{position:relative;width:16px;height:16px;flex-shrink:0}
.acc__item summary i::before,.acc__item summary i::after{
  content:"";position:absolute;inset:50% 0 auto;height:1.6px;background:var(--accent);transition:transform .25s;
}
.acc__item summary i::after{transform:rotate(90deg)}
.acc__item[open] summary i::after{transform:rotate(0)}
.acc__body{padding:0 20px 18px}
.acc__body p{font-size:14px;line-height:1.72;color:var(--muted)}

/* ---------- cta band ---------- */
.ctaband{padding:clamp(52px,6vw,80px) 0;background:linear-gradient(120deg,#121b2c,#0a101c);border-top:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.ctaband::after{content:"";position:absolute;width:520px;height:520px;right:-120px;top:-200px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,26,.2),transparent 66%);filter:blur(50px)}
.ctaband__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.ctaband h2{font-size:clamp(24px,2.9vw,36px);max-width:22ch}
.ctaband p{margin-top:12px;font-size:14.5px;color:var(--muted);max-width:62ch}
.ctaband__actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.foot{background:#050810;padding:64px 0 26px;border-top:1px solid var(--line)}
.foot__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.foot__brand p{font-size:13.5px;color:var(--muted);margin-top:16px;max-width:34ch}
.foot__addr{color:#7f8da2!important}
.foot__col h3{font-size:11.5px;letter-spacing:.15em;text-transform:uppercase;color:#6c7a90;margin-bottom:14px}
.foot__col a,.foot__hours{display:block;font-size:13.5px;color:#b3bfd0;margin-bottom:9px;transition:color .2s}
.foot__col a:hover{color:var(--accent)}
.foot__hours{color:#6c7a90;font-size:12.5px}
.foot__bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:22px;border-top:1px solid var(--line);font-size:12px;color:#6c7a90}
.foot__cert{letter-spacing:.14em;text-transform:uppercase;font-size:10.5px;color:#5b6879}
.brand--foot .brand__mark{width:36px;height:36px}

/* ---------- reveal ---------- */
.js-reveal{opacity:0;transform:translateY(22px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.js-reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .hero__media{max-width:520px;padding-left:0}
  .models{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .mfg__notes{grid-template-columns:1fr}
  .apps__grid{grid-template-columns:repeat(2,1fr)}
  .qtabs{grid-template-columns:1fr}
  .qtabs__list{grid-auto-flow:column;grid-auto-columns:1fr;overflow-x:auto;padding-bottom:2px}
  .quote__grid,.company__grid,.faq__grid,.focus__grid{grid-template-columns:1fr}
  .sec__head--split{grid-template-columns:1fr;gap:20px}
  .foot__grid{grid-template-columns:1fr 1fr}
}

@media (max-width:900px){
  :root{--head-h:68px}
  .hero__chips{max-width:100%}
  /* 移动端：背景图弱化，文字区压暗到可读 */
  .hero--photo{min-height:0;display:block;padding:calc(var(--head-h) + 52px) 0 58px}
  .hero__photo img{object-position:70% center;transform:none}
  .hero__scrim{background:linear-gradient(180deg,rgba(7,11,18,.9) 0%,rgba(7,11,18,.88) 42%,rgba(7,11,18,.95) 74%,#070b12 100%)}
  .hero--photo .stats{margin-top:32px}
  .hero__inner--solo .hero__copy{max-width:100%}
  .head__cta{display:none}
  .nav__cta{display:inline-flex;margin-top:6px}
  .burger{display:block}
  .nav{
    position:fixed;inset:var(--head-h) 0 auto;flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(7,11,18,.98);backdrop-filter:blur(18px);padding:18px 22px 26px;
    border-bottom:1px solid var(--line);max-height:calc(100vh - var(--head-h));overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.3s var(--ease);margin-left:0;
  }
  .head.is-open .nav{transform:none;opacity:1;visibility:visible}
  .nav__link{display:flex;justify-content:space-between;width:100%;padding:13px 4px;font-size:15px;border-bottom:1px solid rgba(148,163,184,.1)}
  .megamenu{
    position:static;width:100%;opacity:1;visibility:visible;transform:none;box-shadow:none;
    background:none;border:0;border-radius:0;padding:0 0 6px;display:none;
  }
  .nav__item--has-menu.is-open .megamenu{display:block}
  .megamenu a{padding:10px 8px}
  .megamenu span{font-size:11.5px}
  .models{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr 1fr;gap:22px 12px}
  .linecard{grid-template-columns:1fr}
  .linecard__media{max-width:200px}
  .company__media{grid-template-columns:1fr 1fr}
  .qtabs__panels{padding:24px 22px}
}

@media (max-width:600px){
  .wrap{padding:0 18px}
  .head__inner{padding:0 18px}
  .hero{padding-top:calc(var(--head-h) + 44px);padding-bottom:60px}
  .hero__copy h1{font-size:31px}
  .lede{font-size:15px}
  .hero__actions .btn{flex:1 1 100%}
  .hero__chips{margin-top:16px}
  .models{grid-template-columns:1fr}
  .steps,.apps__grid{grid-template-columns:1fr}
  .qform__row{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .ctaband__actions{width:100%}
  .ctaband__actions .btn{flex:1}
  .foot__grid{grid-template-columns:1fr}
  .foot__bottom{flex-direction:column;align-items:flex-start}
  .builder,.qform{padding:22px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .js-reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ==========================================================================
   Brand lockup (XGNFB wordmark)
   ========================================================================== */
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand__logo{display:block;height:23px;width:auto}
.brand__tag{
  font-size:9px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted-2);
  padding-left:12px;border-left:1px solid var(--line);line-height:1.2;
}
.brand__logo--foot{height:26px}
@media (max-width:640px){
  .brand__tag{display:none}
  .brand__logo{height:21px}
}

/* ==========================================================================
   Certificates page
   ========================================================================== */
.phero{position:relative;padding:calc(var(--head-h) + 68px) 0 64px;overflow:hidden}
.phero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.phero__inner{position:relative;z-index:1;max-width:none}
.phero__title{font-size:clamp(40px,5.6vw,68px);line-height:1.02;margin-top:18px}
.phero__lead{margin-top:22px;font-size:clamp(15px,1.3vw,17.5px);line-height:1.65;color:var(--muted);max-width:66ch}

.certsec{background:var(--paper);color:var(--ink-txt);padding:clamp(44px,4.6vw,64px) 0 clamp(72px,8vw,110px)}
.certfilter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:34px}
.certfilter__btn{
  display:inline-flex;align-items:center;gap:8px;padding:9px 15px;border-radius:999px;
  border:1px solid #d7dce4;background:#fff;color:#3b4759;font-size:13.5px;font-weight:550;
  transition:border-color .2s,background .2s,color .2s,transform .2s;
}
.certfilter__btn span{font-size:11.5px;color:#8b98ab;font-variant-numeric:tabular-nums}
.certfilter__btn:hover{border-color:#b9c3d1;transform:translateY(-1px)}
.certfilter__btn.is-active{background:var(--ink);border-color:var(--ink);color:#fff}
.certfilter__btn.is-active span{color:rgba(255,255,255,.6)}

.certgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.certcard{
  display:flex;flex-direction:column;background:#fff;border:1px solid #e0e4ea;border-radius:16px;
  overflow:hidden;transition:box-shadow .3s var(--ease),transform .3s var(--ease),border-color .3s;
}
.certcard:hover{transform:translateY(-3px);box-shadow:0 26px 50px -32px rgba(15,23,36,.5);border-color:#cfd6e0}
.certcard__media{
  position:relative;display:block;width:100%;aspect-ratio:3/4;overflow:hidden;padding:0;
  background:#eef1f5;border-bottom:1px solid #e6e9ef;
}
.certcard__media img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top center;
  transition:transform .5s var(--ease);
}
.certcard:hover .certcard__media img{transform:scale(1.03)}
.certcard__zoom{
  position:absolute;left:50%;bottom:10px;transform:translate(-50%,8px);opacity:0;
  background:rgba(7,11,18,.86);color:#fff;font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;
  padding:7px 12px;border-radius:999px;transition:opacity .25s,transform .25s;white-space:nowrap;
}
.certcard:hover .certcard__zoom,.certcard__media:focus-visible .certcard__zoom{opacity:1;transform:translate(-50%,0)}
.certcard__body{padding:15px 15px 17px;display:flex;flex-direction:column;gap:9px;flex:1}
.certcard__kind{display:flex;align-items:center;gap:6px;font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:#7b8798}
.dot{width:6px;height:6px;border-radius:50%;flex:none}
.dot--ieccex{background:#1a7f5a}
.dot--atex{background:#2f6bd8}
.dot--ccc{background:#c8322b}
.dot--cnex{background:#b8791f}
.certcard__title{font-size:14.6px;font-weight:650;color:#0b1220;letter-spacing:-.01em;line-height:1.34}
.certcard__meta{margin:2px 0 0;display:flex;flex-direction:column;gap:8px}
.certcard__meta div{display:block}
.certcard__meta dt{font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:#97a3b3;margin-bottom:2px}
.certcard__meta dd{margin:0;font-size:12.4px;color:#2c3849;line-height:1.42;word-break:break-word}
.certcard.is-hidden{display:none}

/* verify */
.verify{padding:clamp(66px,7vw,104px) 0;border-top:1px solid var(--line);background:var(--ink-2)}
.verify__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:38px}
.verify__card{
  display:flex;flex-direction:column;gap:9px;padding:22px 20px;border:1px solid var(--line);
  border-radius:16px;background:rgba(255,255,255,.025);transition:border-color .25s,background .25s,transform .25s;
}
.verify__card:hover{border-color:rgba(255,107,26,.38);background:rgba(255,107,26,.05);transform:translateY(-3px)}
.verify__card b{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.verify__card span{font-size:13.5px;color:#a9b6c7;line-height:1.55}
.verify__card em{margin-top:auto;font-style:normal;font-size:12px;color:var(--muted-2);padding-top:6px}
.verify__card--plain b{color:#7f8ea3}

/* language note */
.certnote{padding:clamp(52px,5.5vw,84px) 0;border-top:1px solid var(--line)}
.certnote__inner{display:grid;grid-template-columns:64px 1fr;gap:26px;max-width:900px;margin:0 auto}
.certnote__icon{
  display:grid;place-items:center;width:64px;height:64px;border-radius:14px;
  background:rgba(255,107,26,.1);border:1px solid rgba(255,107,26,.28);
  color:var(--accent);font-size:26px;font-weight:600;
}
.certnote__title{font-size:clamp(20px,2.2vw,26px);margin-bottom:14px}
.certnote p{color:var(--muted);font-size:14.5px;line-height:1.7;margin-bottom:12px;max-width:72ch}
.certnote strong{color:#dbe4f1;font-weight:600}

/* lightbox */
.certlb{position:fixed;inset:0;z-index:200;background:rgba(5,8,13,.93);backdrop-filter:blur(6px);
  display:grid;place-items:center;padding:32px 24px;overflow:auto}
.certlb[hidden]{display:none}
.certlb__fig{margin:0;max-width:min(900px,100%);display:flex;flex-direction:column;gap:14px;align-items:center}
.certlb__fig img{max-height:calc(100vh - 140px);width:auto;max-width:100%;border-radius:10px;background:#fff}
.certlb__fig figcaption{font-size:12.5px;color:#9aa8bb;text-align:center;letter-spacing:.02em}
.certlb__close{position:fixed;top:18px;right:20px;width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,.08);border:1px solid var(--line);color:#dbe4f1;font-size:24px;line-height:1}

@media (max-width:900px){
  .certgrid{grid-template-columns:repeat(2,1fr)}
  .verify__grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .certnote__inner{grid-template-columns:1fr;gap:18px}
}
@media (max-width:680px){
  .verify__grid{grid-template-columns:1fr}
  .certfilter{gap:6px}
  .certfilter__btn{padding:8px 12px;font-size:12.5px}
}
@media (max-width:460px){
  .certgrid{grid-template-columns:1fr}
  .certcard__media{aspect-ratio:4/5}
}

.quality__cta{margin-top:26px}
.certfilter__note{flex-basis:100%;margin-top:4px;font-size:12.5px;color:#7b8798}