/* ================= 金尔泰官网 · 高端工业风设计系统 ================= */
:root{
  --ink:#0e1116;          /* 深炭黑 */
  --ink-2:#161b22;
  --steel:#2a3340;        /* 钢灰 */
  --mist:#6b7686;         /* 雾灰文字 */
  --paper:#f7f8fa;        /* 浅灰白 */
  --white:#ffffff;
  --ember:#ff6b1a;        /* 熔炉橙 */
  --ember-deep:#e04e00;
  --gold:#c9a063;         /* 金属金点缀 */
  --line:#e5e8ee;
  --radius:14px;
  --shadow:0 10px 40px rgba(14,17,22,.08);
  --shadow-lg:0 24px 80px rgba(14,17,22,.16);
  --font:"PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Noto Sans SC",-apple-system,"Segoe UI",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:#9aa4b2;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#c9d2de;transition:color .2s}
.topbar a:hover{color:var(--ember)}
.topbar .tel{color:var(--gold);font-weight:600;letter-spacing:.5px}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.nav.scrolled{box-shadow:var(--shadow)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:14px}
.brand img{height:44px;width:auto}
.brand .name{font-size:19px;font-weight:700;letter-spacing:1px}
.brand .name small{display:block;font-size:10.5px;color:var(--mist);font-weight:500;letter-spacing:.6px;text-transform:uppercase}
.menu{display:flex;gap:6px}
.menu a{padding:10px 18px;border-radius:99px;font-size:15.5px;color:#333c49;font-weight:500;transition:all .25s}
.menu a:hover{background:#f0f3f8;color:var(--ink)}
.menu a.active{background:var(--ink);color:#fff}
.menu a.active:hover{background:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:99px;font-weight:600;font-size:15px;transition:all .25s;cursor:pointer;border:none}
.btn-ember{background:linear-gradient(135deg,var(--ember),var(--ember-deep));color:#fff;box-shadow:0 8px 24px rgba(255,107,26,.35)}
.btn-ember:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(255,107,26,.45)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--steel);transform:translateY(-2px)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--ink)}
.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.06);animation:heroZoom 18s ease-out forwards}
.hero .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,12,16,.86) 8%,rgba(10,12,16,.55) 46%,rgba(10,12,16,.28) 100%)}
.hero .inner{position:relative;z-index:2;padding:110px 0 130px}
.hero .kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:3px;color:var(--gold);text-transform:uppercase;font-weight:600;margin-bottom:22px}
.hero .kicker::before{content:"";width:36px;height:1px;background:var(--gold)}
.hero h1{font-size:clamp(34px,5vw,60px);font-weight:800;line-height:1.22;letter-spacing:.5px;margin-bottom:14px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--ember),#ffb25e);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{font-size:clamp(15px,1.6vw,19px);color:#c5cdd8;max-width:620px;margin-bottom:40px}
.hero .cta{display:flex;gap:16px;flex-wrap:wrap}
.hero .stats{position:absolute;left:0;right:0;bottom:0;z-index:3;background:linear-gradient(0deg,rgba(8,10,14,.92),rgba(8,10,14,0))}
.hero .stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:30px 24px}
.stat{text-align:left;padding-left:18px;border-left:2px solid rgba(201,160,99,.45)}
.stat b{display:block;font-size:clamp(26px,3vw,38px);font-weight:800;color:#fff;line-height:1.15}
.stat b i{font-style:normal;color:var(--ember);font-size:.6em;margin-left:2px}
.stat span{font-size:13.5px;color:#8f99a8;letter-spacing:1px}
@keyframes heroZoom{from{transform:scale(1.12)}to{transform:scale(1)}}

/* ---------- 通用 Section ---------- */
.sec{padding:96px 0}
.sec.gray{background:var(--paper)}
.sec.dark{background:var(--ink);color:#dfe4ea}
.sec-head{margin-bottom:52px}
.sec-head .tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:3px;font-weight:700;color:var(--ember);text-transform:uppercase;margin-bottom:14px}
.sec-head .tag::before{content:"";width:26px;height:2px;background:var(--ember)}
.sec-head h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.3;letter-spacing:.5px}
.sec-head p{margin-top:14px;color:var(--mist);max-width:640px;font-size:16px}
.sec.dark .sec-head p{color:#94a0af}
.sec-head.center{text-align:center}
.sec-head.center .tag::after{content:"";width:26px;height:2px;background:var(--ember)}
.sec-head.center p{margin-left:auto;margin-right:auto}

/* ---------- 关于（首页）---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.about-grid .imgbox{position:relative}
.about-grid .imgbox img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.about-grid .imgbox .float{position:absolute;right:-26px;bottom:-30px;background:#fff;border-radius:16px;padding:22px 28px;box-shadow:var(--shadow-lg);display:flex;gap:18px;align-items:center}
.about-grid .imgbox .float b{font-size:34px;font-weight:800;color:var(--ember)}
.about-grid .imgbox .float span{font-size:13px;color:var(--mist);line-height:1.45}
.about-grid h3{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.45;margin-bottom:20px}
.about-grid p{color:#4a5361;margin-bottom:16px;text-align:justify}
.checks{margin:26px 0 34px;display:grid;grid-template-columns:1fr 1fr;gap:13px 22px}
.checks li{list-style:none;display:flex;gap:10px;align-items:flex-start;font-size:15px;color:#333c49;font-weight:500}
.checks li::before{content:"✓";flex:none;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--ember),var(--ember-deep));color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center;margin-top:3px}

/* ---------- 产品卡 ---------- */
.cat-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.cat-tabs a{padding:10px 22px;border-radius:99px;border:1.5px solid var(--line);font-size:15px;font-weight:500;color:#3a4452;transition:all .25s;background:#fff}
.cat-tabs a:hover{border-color:var(--ember);color:var(--ember)}
.cat-tabs a.on{background:var(--ink);border-color:var(--ink);color:#fff}
.grid-pro{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.card-pro{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;cursor:pointer;display:block}
.card-pro:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.card-pro .ph{aspect-ratio:4/3;overflow:hidden;background:#eef1f5}
.card-pro .ph img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.card-pro:hover .ph img{transform:scale(1.08)}
.card-pro .bd{padding:20px 22px 24px}
.card-pro .bd b{display:block;font-size:17px;font-weight:700;margin-bottom:6px}
.card-pro .bd span{font-size:13.5px;color:var(--mist)}
.card-pro .bd .more{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--ember)}
.card-pro .bd .more::after{content:"→";transition:transform .25s}
.card-pro:hover .bd .more::after{transform:translateX(4px)}

/* ---------- 优势（三柱）---------- */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.adv{position:relative;border-radius:var(--radius);overflow:hidden;min-height:380px;display:flex;align-items:flex-end;color:#fff;box-shadow:var(--shadow)}
.adv .bg{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .6s}
.adv:hover .bg{transform:scale(1.07)}
.adv .veil{position:absolute;inset:0;background:linear-gradient(0deg,rgba(8,10,14,.92) 6%,rgba(8,10,14,.25) 62%,rgba(8,10,14,.06))}
.adv .in{position:relative;z-index:2;padding:34px 30px}
.adv .in .no{font-size:15px;font-weight:700;color:var(--gold);letter-spacing:2px;margin-bottom:10px}
.adv .in b{display:block;font-size:22px;font-weight:800;margin-bottom:10px}
.adv .in p{font-size:14.5px;color:#c3cbd6;line-height:1.75}

/* ---------- 新闻 ---------- */
.grid-news{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card-news{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}
.card-news:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card-news .bd{padding:24px 26px 26px;flex:1;display:flex;flex-direction:column}
.card-news .date{font-size:13px;color:var(--ember);font-weight:700;letter-spacing:1px;margin-bottom:10px}
.card-news b{font-size:18px;font-weight:700;line-height:1.5;margin-bottom:10px}
.card-news p{font-size:14px;color:var(--mist);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-news .go{margin-top:16px;font-size:13.5px;font-weight:600;color:var(--ink);display:inline-flex;gap:6px;align-items:center}
.card-news .go::after{content:"→"}

/* ---------- CTA 横幅 ---------- */
.cta-band{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.cta-band .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.28}
.cta-band .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,12,16,.9),rgba(10,12,16,.55))}
.cta-band .in{position:relative;z-index:2;padding:88px 0;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:800;margin-bottom:10px}
.cta-band p{color:#aeb7c3;font-size:16px}

/* ---------- 页脚 ---------- */
footer{background:#0b0e13;color:#8f99a8;font-size:14px}
footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding:64px 0 46px}
footer .brand-foot{display:flex;align-items:center;gap:12px;margin-bottom:18px;color:#fff}
footer .brand-foot img{height:38px}
footer .brand-foot b{font-size:17px}
footer p{margin-bottom:10px;line-height:1.8}
footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;letter-spacing:1px}
footer .links a{display:block;padding:5px 0;color:#8f99a8;transition:color .2s}
footer .links a:hover{color:var(--ember)}
footer .contact li{list-style:none;display:flex;gap:10px;margin-bottom:12px}
footer .contact li b{color:#c9d2de;font-weight:500}
footer .bottom{border-top:1px solid #1c222c;padding:22px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#5d6773}

/* ---------- 子页 hero ---------- */
.page-hero{position:relative;background:var(--ink);color:#fff;overflow:hidden;padding:110px 0 84px}
.page-hero .bg{position:absolute;inset:0;background-size:cover;background-position:center 30%;opacity:.34;filter:saturate(.85)}
.page-hero .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,12,16,.88) 10%,rgba(10,12,16,.5) 60%,rgba(10,12,16,.3))}
.page-hero .in{position:relative;z-index:2}
.page-hero .crumb{font-size:13.5px;color:#93a0b0;margin-bottom:16px;letter-spacing:1px}
.page-hero .crumb a{color:#c3ccd8}
.page-hero .crumb a:hover{color:var(--ember)}
.page-hero h1{font-size:clamp(30px,4vw,46px);font-weight:800;letter-spacing:.5px;margin-bottom:12px}
.page-hero .sub{color:#aab4c1;font-size:16.5px;max-width:600px}

/* ---------- 详情 ---------- */
.detail-layout{display:grid;grid-template-columns:440px 1fr;gap:56px;align-items:start}
.detail-layout .pic{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);position:sticky;top:100px}
.detail-layout .pic img{width:100%;aspect-ratio:4/3;object-fit:cover}
.detail-layout h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;margin-bottom:8px}
.detail-layout .en{color:var(--mist);font-size:14px;letter-spacing:2px;text-transform:uppercase;margin-bottom:26px}
.detail-layout p{color:#414b59;margin-bottom:18px;text-align:justify}
.spec-table{margin:26px 0;width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.spec-table th{background:var(--ink);color:#fff;text-align:left;padding:14px 20px;font-size:14px;font-weight:600;width:170px}
.spec-table td{padding:14px 20px;border-bottom:1px solid var(--line);font-size:14.5px;color:#333c49}

/* ---------- 案例/画廊 ---------- */
.masonry{columns:3;column-gap:26px}
.case-card{break-inside:avoid;margin-bottom:26px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative;background:#fff;transition:transform .3s,box-shadow .3s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-card img{width:100%}
.case-card .cap{position:absolute;left:0;right:0;bottom:0;padding:44px 22px 18px;background:linear-gradient(0deg,rgba(8,10,14,.88),transparent);color:#fff}
.case-card .cap b{font-size:16px;font-weight:700;display:block}

/* ---------- 新闻文章 ---------- */
.article{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:56px 64px;max-width:860px;margin:0 auto}
.article .meta{display:flex;gap:18px;color:var(--mist);font-size:14px;margin-bottom:26px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.article h1{font-size:clamp(24px,3vw,32px);font-weight:800;line-height:1.5;margin-bottom:26px}
.article p{margin-bottom:20px;color:#3a4452;text-align:justify;font-size:16px;line-height:1.9}
.article .back{margin-top:40px;display:inline-flex}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1020px){
  .grid-pro{grid-template-columns:repeat(2,1fr)}
  .adv-grid,.grid-news{grid-template-columns:1fr 1fr}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .detail-layout{grid-template-columns:1fr}
  .masonry{columns:2}
  footer .top{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .menu{display:none}
  .grid-pro,.adv-grid,.grid-news{grid-template-columns:1fr}
  .masonry{columns:1}
  .hero .stats .wrap{grid-template-columns:1fr 1fr}
  .checks{grid-template-columns:1fr}
  .sec{padding:64px 0}
  .article{padding:34px 24px}
  .topbar .wrap span.hide-m{display:none}
}