/* TIR · Jingrui — single stylesheet, no external fonts */
:root{--navy:#0A1628;--navy2:#0B1F33;--steel:#2B4C6F;--steel2:#3D6A97;--ice:#9CC3EA;--ink:#13202f;--mute:#5d6b7a;--line:#dfe5ec;--bg2:#f3f6f9;--r:10px;
--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Noto Sans CJK SC","Source Han Sans SC",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);line-height:1.7;background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.25;margin:0 0 .6em;letter-spacing:.01em}h1{font-size:clamp(2rem,4.4vw,3.6rem);font-weight:700}h2{font-size:clamp(1.5rem,2.6vw,2.2rem)}h3{font-size:1.12rem}
p{margin:0 0 1em}.wrap{width:min(1240px,92%);margin:0 auto}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px}
.kicker{font-size:.78rem;letter-spacing:.22em;color:var(--steel2);font-weight:600;margin-bottom:.8em;text-transform:uppercase}
.lead{font-size:1.1rem;color:#c9d6e4;max-width:720px}.muted{color:var(--mute)}.small{font-size:.85rem}
.btn{display:inline-flex;align-items:center;gap:.5em;background:var(--steel);color:#fff;padding:.85em 1.6em;border-radius:4px;font-weight:600;border:1px solid var(--steel);transition:.2s;cursor:pointer;font:inherit;font-weight:600}
.btn:hover{background:var(--steel2);border-color:var(--steel2)}.btn.ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}.btn.ghost:hover{background:rgba(255,255,255,.1)}
.btn.ghost.dark-t{color:var(--navy);border-color:var(--steel)}.btn.ghost.dark-t:hover{background:var(--bg2)}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(10,22,40,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);color:#fff}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}.mark{width:38px;height:38px;color:#fff}.brand b{display:block;font-size:1.1rem;letter-spacing:.08em}.brand small{display:block;font-size:.72rem;color:#9fb2c6;letter-spacing:.04em}
.nav{display:flex;gap:4px;align-items:center}.nav a{padding:.5em .95em;font-size:.95rem;color:#d4deea;border-radius:4px}.nav a:hover,.nav a.on{color:#fff;background:rgba(255,255,255,.07)}
.nav a.on{box-shadow:inset 0 -2px 0 var(--ice)}.nav .lang{margin-left:10px;border:1px solid rgba(255,255,255,.3);font-size:.85rem}
.menu-btn{display:none;background:none;border:0;padding:8px;cursor:pointer}.menu-btn span{display:block;width:24px;height:2px;background:#fff;margin:5px 0}
/* hero */
.hero{position:relative;min-height:min(88vh,820px);display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--navy)}
.hero-media,.hero-media>*{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-poster{animation:kb 28s ease-in-out infinite alternate}
.hero-video{opacity:0;transition:opacity 1.2s}.hero-video.ready{opacity:1}
.hero-shade{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,22,40,.94) 0%,rgba(10,22,40,.78) 45%,rgba(11,31,51,.45) 100%),linear-gradient(0deg,rgba(10,22,40,.9),transparent 40%)}
.hero-waves{position:absolute;left:0;bottom:0;width:200%;height:110px;fill:rgba(43,76,111,.22)}
.hero-waves .w1{animation:wave 18s linear infinite}.hero-waves .w2{fill:rgba(10,22,40,.6);animation:wave 11s linear infinite reverse}
@keyframes wave{to{transform:translateX(-720px)}}@keyframes kb{from{transform:scale(1)}to{transform:scale(1.12) translate(-1.5%,-1%)}}
.hero-in{position:relative;z-index:2;padding:120px 0 140px}.hero h1{max-width:900px;text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero .kicker{color:var(--ice)}.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
/* stats */
.stats{background:var(--navy2);color:#fff;border-top:1px solid rgba(255,255,255,.06)}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr)}.stat{padding:34px 24px;border-left:1px solid rgba(255,255,255,.08)}.stat:first-child{border-left:0}
.stat b{display:block;font-size:1.9rem;font-weight:700;color:#fff;letter-spacing:.02em}.stat span{color:#9fb2c6;font-size:.9rem}
/* sections */
.sec{padding:96px 0}.sec.alt{background:var(--bg2)}.sec.dark{background:linear-gradient(160deg,var(--navy) 0%,var(--navy2) 60%,#12304d 100%);color:#fff}
.sec.dark .kicker{color:var(--ice)}.sec-h{margin-bottom:40px}.sec-h.row{display:flex;justify-content:space-between;align-items:flex-end;gap:20px}.sec-h p{color:var(--mute)}
.link{color:var(--steel);font-weight:600;white-space:nowrap}
.cats{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.catc{background:#fff;padding:32px 26px 28px;position:relative;transition:.25s;min-height:230px}.catc:hover{background:var(--navy);color:#fff}.catc:hover p{color:#b8c7d8}
.catc .num{font-size:.8rem;color:var(--steel2);font-weight:700;letter-spacing:.1em}.catc h3{margin:14px 0 10px}.catc p{color:var(--mute);font-size:.92rem}.catc .more{position:absolute;bottom:22px;right:24px;color:var(--steel2)}
.split{display:grid;grid-template-columns:1fr 1.2fr;gap:64px;align-items:center}
.caps{display:grid;grid-template-columns:1fr 1fr;gap:18px}.cap{border:1px solid rgba(255,255,255,.12);border-radius:var(--r);padding:26px;background:rgba(255,255,255,.03)}
.cap h3{color:#fff;position:relative;padding-left:14px}.cap h3:before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;background:var(--ice)}.cap p{color:#b8c7d8;font-size:.93rem;margin:0}
/* product cards */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:.25s}
.pcard:hover{transform:translateY(-4px);box-shadow:0 18px 40px -18px rgba(10,22,40,.35);border-color:#c5d1dd}
.pimg{aspect-ratio:4/3;background:#0f2236;overflow:hidden}.pimg img{width:100%;height:100%;object-fit:cover;transition:transform .5s}.pcard:hover .pimg img{transform:scale(1.05)}
.fit-contain{background:#eef2f6!important}.fit-contain img{object-fit:contain!important;padding:12px}
.pbody{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}.pbody h3{margin:8px 0 14px;flex:1}
.tag{font-size:.75rem;color:var(--steel);font-weight:600;letter-spacing:.06em;text-transform:uppercase}.more{color:var(--steel);font-weight:600;font-size:.9rem}
/* applications cards */
.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.appc{position:relative;min-height:340px;border-radius:var(--r);overflow:hidden;color:#fff;display:flex;align-items:flex-end;background:var(--bg) center/cover}
.appc:before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(10,22,40,.95) 15%,rgba(10,22,40,.25));transition:.3s}.appc:hover:before{background:linear-gradient(0deg,rgba(10,22,40,.95) 30%,rgba(43,76,111,.55))}
.appc div{position:relative;padding:24px}.appc p{font-size:.9rem;color:#c9d6e4;margin:0}
/* cta */
.cta{background:linear-gradient(120deg,var(--steel) 0%,#1d3a59 60%,var(--navy2) 100%);color:#fff;padding:64px 0}
.cta-in{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}.cta p{color:#d3dfeb;margin:0}.cta h2{margin-bottom:.3em}.cta-btns{display:flex;gap:12px;flex-wrap:wrap}
.cta .btn{background:#fff;color:var(--navy);border-color:#fff}.cta .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
/* sub hero */
.subhero{position:relative;color:#fff;padding:120px 0 80px;background:linear-gradient(100deg,rgba(10,22,40,.96),rgba(10,22,40,.72)),var(--bg) center/cover;background-color:var(--navy)}
.subhero .kicker{color:var(--ice)}.crumbs{font-size:.85rem;color:#9fb2c6;margin-bottom:26px}.crumbs a:hover{color:#fff}.crumbs span{margin:0 6px;opacity:.5}.crumbs em{font-style:normal;color:#dbe5ef}
.phead{background:var(--navy);padding:22px 0}.phead .crumbs{margin:0}
.tabs{position:sticky;top:72px;z-index:40;background:#fff;border-bottom:1px solid var(--line)}.tabs .wrap{display:flex;gap:6px;overflow-x:auto}.tabs a{padding:16px 16px;white-space:nowrap;color:var(--mute);font-weight:600;font-size:.93rem}.tabs a:hover{color:var(--steel)}
.catsec{margin-bottom:80px;scroll-margin-top:140px}.catsec:last-child{margin-bottom:0}.catsec .sec-h{border-left:4px solid var(--steel);padding-left:18px;margin-bottom:28px}.catsec .sec-h h2{margin-bottom:.2em}
/* product detail */
.pgrid{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:start}
.gmain{aspect-ratio:4/3;background:#0f2236;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}.gmain img{width:100%;height:100%;object-fit:cover}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}.thumb{width:84px;height:64px;padding:0;border:2px solid transparent;border-radius:6px;overflow:hidden;cursor:pointer;background:#eef2f6}.thumb img{width:100%;height:100%;object-fit:cover}.thumb.on{border-color:var(--steel)}
.pinfo h1{font-size:clamp(1.7rem,3vw,2.5rem);margin-top:10px}.prose p{color:#334354}
.pmore{margin-top:64px;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:56px}.pmore h2{font-size:1.35rem;padding-bottom:12px;border-bottom:2px solid var(--navy)}
.ticks{list-style:none;padding:0;margin:0}.ticks li{padding:10px 0 10px 28px;border-bottom:1px solid var(--line);position:relative}.ticks li:before{content:"";position:absolute;left:4px;top:19px;width:10px;height:6px;border-left:2px solid var(--steel);border-bottom:2px solid var(--steel);transform:rotate(-45deg)}
.specs{width:100%;border-collapse:collapse}.specs th,.specs td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}.specs th{width:38%;color:var(--mute);font-weight:600;background:var(--bg2)}
.chips{display:flex;flex-wrap:wrap;gap:12px}.chips span{border:1px solid var(--line);padding:.6em 1.3em;border-radius:40px;font-weight:600;color:var(--navy);background:#fff}.chips.sm{margin:0 0 18px}.chips.sm span{font-size:.82rem;padding:.35em .9em;background:var(--bg2)}
/* about */
.about .prose p{font-size:1.05rem;line-height:1.75}.fig{margin:0}.fig img{border-radius:var(--r);width:100%;display:block}.fig figcaption{font-size:.85rem;color:var(--mute);margin-top:8px}.wide{width:100%;border-radius:var(--r)}
.about.split{align-items:start;gap:48px}
.about-visual{display:grid;gap:14px}
.about-hero-fig img{aspect-ratio:4/3;object-fit:cover}
.about-side-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.about-side{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.about-side img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.about-side figcaption{padding:8px 10px;font-size:.78rem;color:var(--mute)}
.about-bento{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.about-tile{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.about-tile img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;flex:1}
.about-tile figcaption{padding:10px 12px;font-size:.82rem;color:var(--mute)}
.about-tile.span-2{grid-column:span 2}
.about-tile.tall img{aspect-ratio:16/11}
@media (max-width:1080px){.about-bento{grid-template-columns:repeat(3,1fr)}.about-tile.span-2{grid-column:span 1}.about-tile.tall img{aspect-ratio:4/3}}
@media (max-width:860px){.about-side-col{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.about-bento{grid-template-columns:1fr 1fr}.about-side-col{grid-template-columns:1fr}}
/* applications page */
.appsec{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:96px;scroll-margin-top:100px}.appsec:last-child{margin-bottom:0}.appsec.rev .appimg{order:2}
.appimg img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r)}.apptxt .num{font-size:3rem;font-weight:800;color:#e3e9f0;line-height:1}.apptxt h3{font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);margin-top:26px}
.plinks{display:flex;flex-wrap:wrap;gap:10px}.plinks a{background:var(--bg2);border:1px solid var(--line);padding:.5em 1em;border-radius:4px;font-size:.92rem;font-weight:600;color:var(--steel)}.plinks a:hover{background:var(--navy);color:#fff}
/* contact */
.cgrid{display:grid;grid-template-columns:1fr 1.3fr;gap:56px}.ci{padding:20px 0;border-bottom:1px solid var(--line)}.ci span{display:block;font-size:.8rem;color:var(--mute);letter-spacing:.1em;text-transform:uppercase}.ci b{font-size:1.1rem}.ci a:hover{color:var(--steel)}
.form{background:var(--bg2);padding:36px;border-radius:var(--r);border:1px solid var(--line)}.form label{display:block;font-size:.88rem;font-weight:600;color:#334354;margin-bottom:16px}
.form input,.form select,.form textarea{display:block;width:100%;margin-top:6px;padding:.75em .9em;border:1px solid #cdd6e0;border-radius:4px;font:inherit;background:#fff}.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--steel2);border-color:transparent}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
/* footer */
.ftr{background:#07111f;color:#9fb2c6;font-size:.92rem;padding-top:64px}.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:44px}
.ftr h3{color:#fff;font-size:.95rem;margin-bottom:14px}.ftr a{display:block;padding:3px 0}.ftr p a{display:inline}.ftr a:hover{color:#fff}.ftr-brand{color:#fff;font-weight:700;font-size:1.15rem;letter-spacing:.08em}.ftr .muted{color:#6f8296}
.ftr-bot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:.82rem}
/* responsive */
@media (max-width:1080px){.cats{grid-template-columns:repeat(3,1fr)}.apps{grid-template-columns:repeat(2,1fr)}.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:860px){.menu-btn{display:block}.nav{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--navy);padding:12px 4%;border-bottom:1px solid rgba(255,255,255,.1)}.nav.open{display:flex}.nav .lang{margin:8px 0 0;text-align:center}
.split,.pgrid,.pmore,.appsec,.cgrid{grid-template-columns:1fr;gap:32px}.appsec.rev .appimg{order:0}.grid{grid-template-columns:repeat(2,1fr)}.stats-in{grid-template-columns:repeat(2,1fr)}.stat:nth-child(3){border-left:0}.sec{padding:64px 0}}
@media (max-width:560px){.grid,.cats,.apps,.caps,.frow,.ftr-grid{grid-template-columns:1fr}.hero-in{padding:80px 0 110px}.brand small{display:none}.form{padding:22px}}
/* mobile & reduced motion: static poster only */
@media (max-width:768px){.hero-video{display:none}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.hero-video{display:none}html{scroll-behavior:auto}}
@media (max-width:560px){.stat{padding:22px 16px}.stat b{font-size:1.35rem}}

/* manufacturing showcase (legacy grid kept for any residual use) */
.mfg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mfgc{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.mfgc img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mfgc figcaption{padding:10px 12px;font-size:.82rem;color:var(--mute)}
@media (max-width:560px){.mfg-grid{grid-template-columns:repeat(2,1fr)}}