/* ============================================================
   連大技研 LD-POWER — motorsport aesthetic
   ============================================================ */
:root{
  --bg:#0a0a0c;
  --bg-2:#0e0e12;
  --surface:#141419;
  --surface-2:#191920;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.05);
  --text:#f3f3f5;
  --muted:#8b8b96;
  --muted-2:#5f5f6a;
  --red:#e10a26;
  --red-2:#ff2a41;
  --steel:#cdd2da;
  --blue:#2f6bff;
  --maxw:1220px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans TC","Barlow Condensed",system-ui,sans-serif;
  font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block}
h1,h2,h3{margin:0;font-weight:700;line-height:1.02}
::selection{background:var(--red);color:#fff}

/* grain overlay */
.grain{
  position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode:overlay;
}

/* ---- shared ---- */
.overline{
  font-family:"Space Mono",monospace;
  font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--muted);margin:0;display:flex;align-items:center;gap:.7em;
}
.overline .dot{width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 12px var(--red)}
.overline .idx{color:var(--red);font-weight:700}
.glow{text-shadow:0 0 18px rgba(225,10,38,.7)}

.btn{
  --bd:var(--line);
  display:inline-flex;align-items:center;gap:.6em;
  font-family:"Oswald",sans-serif;font-weight:600;letter-spacing:.05em;
  text-transform:uppercase;font-size:.92rem;
  padding:.85em 1.5em;border:1px solid var(--bd);border-radius:2px;
  transition:.35s var(--ease);position:relative;overflow:hidden;
}
.btn svg{transition:transform .35s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--red{background:var(--red);border-color:var(--red);color:#fff}
.btn--red:hover{background:var(--red-2);border-color:var(--red-2);box-shadow:0 10px 40px -8px rgba(225,10,38,.6)}
.btn--ghost{background:transparent;color:var(--text)}
.btn--ghost:hover{border-color:var(--text);background:rgba(255,255,255,.04)}
.btn--full{width:100%;justify-content:center;margin-top:.4rem}

.section{max-width:var(--maxw);margin:0 auto;padding:clamp(5rem,11vw,9rem) clamp(1.2rem,5vw,2.5rem)}
.section__head{margin-bottom:clamp(2.5rem,6vw,4.5rem)}
.section__title{
  font-family:"Oswald",sans-serif;font-weight:700;text-transform:uppercase;
  font-size:clamp(2.4rem,7vw,5rem);line-height:.95;letter-spacing:-.01em;margin-top:1.1rem;
}
.section__sub{color:var(--muted);max-width:44ch;margin:1.4rem 0 0;font-size:1.02rem}

/* ---- reveal ---- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============================================================ NAV */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.4s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(10,10,12,.82);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav__inner{
  max-width:1360px;margin:0 auto;padding:1rem clamp(1.2rem,5vw,2.5rem);
  display:flex;align-items:center;gap:1.5rem;
}
.brand{display:flex;align-items:center;gap:.7rem}
.brand__mark{color:var(--steel);display:flex}
.brand__text{display:flex;flex-direction:column;line-height:1}
.brand__text b{font-family:"Oswald",sans-serif;font-size:1.12rem;letter-spacing:.03em;font-weight:600}
.brand__text i{font-family:"Space Mono",monospace;font-size:.62rem;letter-spacing:.34em;color:var(--red);font-style:normal;margin-top:3px}
.nav__links{display:flex;gap:2rem;margin-left:auto}
.nav__links a{
  font-family:"Oswald",sans-serif;font-weight:500;text-transform:uppercase;
  font-size:.86rem;letter-spacing:.06em;color:var(--muted);position:relative;padding:.3em 0;
  transition:color .3s;
}
.nav__links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--red);transition:width .35s var(--ease)}
.nav__links a:hover{color:var(--text)}
.nav__links a:hover::after{width:100%}
.nav__cta{
  font-family:"Space Mono",monospace;font-size:.82rem;letter-spacing:.05em;
  border:1px solid var(--line);padding:.6em 1em;border-radius:2px;color:var(--text);
  transition:.3s var(--ease);white-space:nowrap;
}
.nav__cta:hover{border-color:var(--red);color:var(--red-2);box-shadow:0 0 24px -6px rgba(225,10,38,.5)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav__burger span{width:26px;height:2px;background:var(--text);transition:.3s var(--ease)}

/* ============================================================ HERO */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden;padding-top:6rem}
.hero__bg{position:absolute;inset:0;z-index:0}
.hero__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 80% at 70% 40%,#000 30%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 90% 80% at 70% 40%,#000 30%,transparent 80%);
}
.hero__ghost{
  position:absolute;right:-6%;top:44%;transform:translateY(-50%);
  font-family:"Oswald",sans-serif;font-weight:700;font-size:min(58vw,760px);line-height:.7;
  color:transparent;-webkit-text-stroke:2px rgba(255,255,255,.035);letter-spacing:-.04em;user-select:none;
}
.hero__stripe{
  position:absolute;left:0;right:0;bottom:16%;height:3px;
  background:linear-gradient(90deg,transparent,var(--red) 40%,var(--red) 60%,transparent);
  opacity:.5;filter:blur(.5px);
}
.hero__wrap{
  position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;width:100%;
  padding:0 clamp(1.2rem,5vw,2.5rem);
  display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center;
}
.hero__copy{max-width:640px}
.hero__title{
  font-family:"Oswald",sans-serif;font-weight:700;text-transform:uppercase;
  font-size:clamp(3rem,9.5vw,7rem);line-height:.9;letter-spacing:-.01em;margin:1.4rem 0 1.6rem;
}
.hero__title .line{display:block;overflow:hidden}
.hero__title .accent{color:var(--red)}
.hero__title em{
  display:inline-block;font-style:normal;font-family:"Space Mono",monospace;
  font-size:.2em;letter-spacing:.35em;color:var(--muted-2);vertical-align:middle;margin-left:.8em;
  font-weight:400;text-transform:none;
}
.hero__lede{color:var(--muted);font-size:1.14rem;line-height:1.75;max-width:46ch}
.hero__lede b{color:var(--text)}
.hero__actions{display:flex;gap:1rem;margin:2.2rem 0 2rem;flex-wrap:wrap}
.hero__tags{list-style:none;display:flex;gap:.6rem;padding:0;margin:0;flex-wrap:wrap}
.hero__tags li{
  font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);border:1px solid var(--line);padding:.45em .9em;border-radius:2px;
}

/* gauge */
.hero__gauge{position:relative;display:flex;flex-direction:column;align-items:center;justify-self:center}
.tach{width:min(42vw,440px);height:auto;filter:drop-shadow(0 30px 60px rgba(0,0,0,.6))}
.tach__ring{fill:none;stroke:var(--line);stroke-width:2}
.tach__ring--in{stroke:var(--line-2)}
.tach__tick{stroke:var(--steel);stroke-width:2}
.tach__tick--major{stroke:var(--text);stroke-width:3}
.tach__tick--red{stroke:var(--red)}
.tach__numlbl{fill:var(--muted);font-family:"Oswald",sans-serif;font-size:20px;font-weight:600;text-anchor:middle;dominant-baseline:middle}
.tach__numlbl--red{fill:var(--red-2)}
.tach__redline{fill:none;stroke:var(--red);stroke-width:5;filter:drop-shadow(0 0 6px rgba(225,10,38,.8))}
.tach__needle path{stroke:var(--red);stroke-width:5;stroke-linecap:round;filter:drop-shadow(0 0 8px rgba(225,10,38,.9))}
.tach__needle{transform-box:fill-box;transform-origin:200px 200px}
.tach__hub{fill:#1a1a1f;stroke:var(--red);stroke-width:3}
.tach__label{fill:var(--muted-2);font-family:"Space Mono",monospace;font-size:15px;letter-spacing:.24em;text-anchor:middle}
.tach__readout{
  margin-top:-2.4rem;display:flex;align-items:baseline;gap:.4rem;
  font-family:"Oswald",sans-serif;
}
.tach__num{font-size:2.6rem;font-weight:700;letter-spacing:.02em;font-variant-numeric:tabular-nums}
.tach__unit{font-family:"Space Mono",monospace;font-size:.8rem;color:var(--muted);letter-spacing:.1em}
.tach__spec{
  margin-top:.6rem;display:flex;gap:.7rem;align-items:center;
  font-family:"Space Mono",monospace;font-size:.7rem;letter-spacing:.2em;color:var(--muted-2);
}
.tach__spec b{color:var(--red-2)}

.hero__scroll{
  position:absolute;left:50%;bottom:2rem;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:.6rem;
  font-family:"Space Mono",monospace;font-size:.66rem;letter-spacing:.3em;color:var(--muted);
}
.hero__scroll i{width:1px;height:44px;background:linear-gradient(var(--red),transparent);position:relative;overflow:hidden}
.hero__scroll i::after{content:"";position:absolute;top:0;left:0;width:100%;height:14px;background:var(--red);animation:scroll 1.8s infinite var(--ease)}
@keyframes scroll{0%{transform:translateY(-16px)}100%{transform:translateY(44px)}}

/* ============================================================ MARQUEE */
.marquee{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-2);overflow:hidden;padding:1.15rem 0;white-space:nowrap;
}
.marquee__track{display:inline-flex;align-items:center;gap:2rem;animation:marq 34s linear infinite}
.marquee__track span{
  font-family:"Oswald",sans-serif;font-weight:600;text-transform:uppercase;
  font-size:1.5rem;letter-spacing:.04em;color:var(--text);
}
.marquee__track b{color:var(--red);font-size:1.2rem;font-weight:400}
@keyframes marq{to{transform:translateX(-50%)}}

/* ============================================================ ABOUT */
.about__body{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(2rem,6vw,5rem);align-items:start}
.about__lead p{color:var(--muted);font-size:1.16rem;line-height:1.85;margin:0 0 1.3rem}
.about__lead b{color:var(--text)}
.about__quote{
  margin:0;padding:2rem 0 2rem 2rem;border-left:3px solid var(--red);position:relative;
  font-family:"Noto Sans TC",sans-serif;font-weight:500;font-size:1.5rem;line-height:1.6;
}
.about__quote .q{
  position:absolute;left:.4rem;top:-1.2rem;font-family:"Oswald",serif;font-size:6rem;color:var(--red);opacity:.25;line-height:1;
}
.about__quote i{color:var(--red-2);font-style:normal}
.about__quote cite{display:block;margin-top:1.2rem;font-family:"Space Mono",monospace;font-size:.8rem;letter-spacing:.1em;color:var(--muted);font-style:normal}

.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  margin-top:clamp(3rem,7vw,5rem);border:1px solid var(--line);
}
.stat{background:var(--bg);padding:2.4rem 1.6rem;text-align:left}
.stat__num{
  display:block;font-family:"Oswald",sans-serif;font-weight:700;
  font-size:clamp(2.6rem,6vw,4rem);line-height:1;letter-spacing:-.01em;
  color:var(--text);font-variant-numeric:tabular-nums;
}
.stat span{display:block;margin-top:.6rem;color:var(--muted);font-size:.92rem;letter-spacing:.02em}
.stat:nth-child(1) .stat__num{color:var(--red-2)}

/* ============================================================ SERVICES */
.services{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.svc{
  background:var(--surface);padding:2.2rem 1.8rem 2.4rem;position:relative;overflow:hidden;
  min-height:230px;display:flex;flex-direction:column;
  transition:background .4s var(--ease),transform .4s var(--ease);
}
.svc::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--red);transform:scaleY(0);transform-origin:bottom;transition:transform .4s var(--ease)}
.svc:hover{background:var(--surface-2)}
.svc:hover::before{transform:scaleY(1)}
.svc__no{
  font-family:"Space Mono",monospace;font-size:.8rem;letter-spacing:.1em;color:var(--muted-2);
  transition:color .4s;
}
.svc:hover .svc__no{color:var(--red)}
.svc__title{
  font-family:"Oswald",sans-serif;font-weight:600;text-transform:uppercase;
  font-size:1.35rem;letter-spacing:.01em;margin:1rem 0 .8rem;
}
.svc__desc{color:var(--muted);font-size:.98rem;line-height:1.65;margin:0}
.svc__arrow{
  margin-top:auto;padding-top:1.2rem;font-size:1.4rem;color:var(--muted-2);
  transition:.4s var(--ease);align-self:flex-start;
}
.svc:hover .svc__arrow{color:var(--red-2);transform:translate(4px,-4px)}

/* ============================================================ WHY */
.why{position:relative;overflow:hidden}
.why__bg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:0}
.why__bg span{
  font-family:"Oswald",sans-serif;font-weight:700;font-size:min(22vw,300px);
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.03);letter-spacing:.02em;white-space:nowrap;
}
.why .section__head,.why__grid{position:relative;z-index:1}
.why__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.why__item{
  border:1px solid var(--line);border-radius:3px;padding:2.2rem;background:rgba(20,20,25,.5);backdrop-filter:blur(4px);
  transition:.4s var(--ease);
}
.why__item:hover{border-color:rgba(225,10,38,.5);background:rgba(20,20,25,.8);transform:translateY(-4px)}
.why__k{font-family:"Space Mono",monospace;font-size:.9rem;color:var(--red);letter-spacing:.1em}
.why__item h3{font-family:"Oswald",sans-serif;font-weight:600;text-transform:uppercase;font-size:1.5rem;margin:.7rem 0 .8rem}
.why__item p{color:var(--muted);margin:0;line-height:1.7}

/* ============================================================ CONTACT */
.contact{background:var(--bg-2)}
.contact__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:1.4rem}
.contact__cards{display:flex;flex-direction:column;gap:1.4rem}
.loc{
  display:block;border:1px solid var(--line);border-radius:3px;padding:2rem;background:var(--surface);
  position:relative;overflow:hidden;transition:.4s var(--ease);flex:1;
}
.loc::after{content:"";position:absolute;inset:0;background:radial-gradient(400px 200px at 100% 0,rgba(225,10,38,.14),transparent 70%);opacity:0;transition:opacity .4s}
.loc:hover{border-color:rgba(225,10,38,.45);transform:translateY(-3px)}
.loc:hover::after{opacity:1}
.loc__tag{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--red)}
.loc h3{font-family:"Oswald",sans-serif;font-weight:600;text-transform:uppercase;font-size:1.6rem;margin:.6rem 0 .5rem}
.loc p{color:var(--muted);margin:0 0 1.2rem}
.loc__go{font-family:"Space Mono",monospace;font-size:.8rem;letter-spacing:.08em;color:var(--text)}
.contact__panel{
  border:1px solid var(--line);border-radius:3px;padding:2.2rem;background:var(--surface);
  display:flex;flex-direction:column;gap:.2rem;
}
.contact__panel .overline{margin-bottom:1.2rem}
.contact__line{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:1.1rem 0;border-bottom:1px solid var(--line);transition:.3s var(--ease);
}
.contact__line:hover{padding-left:.4rem}
.contact__line span{font-family:"Space Mono",monospace;font-size:.78rem;letter-spacing:.1em;color:var(--muted);text-transform:uppercase}
.contact__line b{font-family:"Oswald",sans-serif;font-size:1.24rem;font-weight:600;letter-spacing:.01em;text-align:right}
a.contact__line:hover b{color:var(--red-2)}
.contact__line--static{opacity:.9}
.contact__maps{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem;margin-top:1.4rem}
.mapcard{margin:0;border:1px solid var(--line);border-radius:3px;overflow:hidden;background:var(--surface)}
.mapcard figcaption{display:flex;align-items:center;gap:.8rem;padding:1rem 1.4rem;font-family:"Oswald",sans-serif;text-transform:uppercase;letter-spacing:.02em;font-size:1.15rem;border-bottom:1px solid var(--line)}
.mapcard__tag{font-family:"Space Mono",monospace;font-size:.66rem;letter-spacing:.2em;color:var(--red)}
.mapcard iframe{display:block;width:100%;height:290px;border:0;filter:grayscale(.5) invert(.92) hue-rotate(185deg) contrast(.9) brightness(.95);transition:filter .5s var(--ease)}
.mapcard:hover iframe{filter:none}

/* ============================================================ NEWS */
.news{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.news__wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(1.6rem,5vw,3.5rem);align-items:start}
.news__aside{position:sticky;top:6rem}
.news__meta{display:flex;align-items:center;gap:.7rem;font-family:"Space Mono",monospace;font-size:.8rem;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin:0 0 1.1rem}
.news__live{width:9px;height:9px;border-radius:50%;background:var(--red);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(225,10,38,.55)}70%{box-shadow:0 0 0 13px rgba(225,10,38,0)}100%{box-shadow:0 0 0 0 rgba(225,10,38,0)}}
.news__text{color:var(--muted);line-height:1.85;margin:0 0 1.9rem;max-width:34ch}
.news__embed{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--surface);min-height:400px}
.news__embed iframe{display:block;width:100%;height:680px;border:0}

/* ============================================================ FOOTER */
.foot{border-top:1px solid var(--line);background:var(--bg);padding:clamp(3rem,7vw,4.5rem) clamp(1.2rem,5vw,2.5rem) 2rem}
.foot__top{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;padding-bottom:2.5rem;border-bottom:1px solid var(--line)}
.foot__brand{display:flex;gap:1rem;align-items:center}
.foot__brand .brand__mark{color:var(--steel)}
.foot__brand b{font-family:"Oswald",sans-serif;font-size:1.2rem;letter-spacing:.03em}
.foot__brand p{margin:.3rem 0 0;color:var(--muted);font-size:.86rem}
.foot__nav{display:flex;gap:1.8rem;align-items:center;flex-wrap:wrap}
.foot__nav a{font-family:"Oswald",sans-serif;text-transform:uppercase;font-size:.86rem;letter-spacing:.05em;color:var(--muted);transition:color .3s}
.foot__nav a:hover{color:var(--red-2)}
.foot__bottom{
  max-width:var(--maxw);margin:1.6rem auto 0;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.06em;color:var(--muted-2);
}

/* ============================================================ RESPONSIVE */
@media(max-width:960px){
  .hero__wrap{grid-template-columns:1fr;gap:2.5rem}
  .hero__gauge{order:-1}
  .tach{width:min(66vw,340px)}
  .about__body{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .why__grid{grid-template-columns:1fr}
  .contact__grid{grid-template-columns:1fr}
  .contact__maps{grid-template-columns:1fr}
  .news__wrap{grid-template-columns:1fr}
  .news__aside{position:static}
}
@media(max-width:720px){
  .nav__links,.nav__cta{display:none}
  .nav__burger{display:flex}
  .nav__links.open{
    display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;
    background:rgba(10,10,12,.97);backdrop-filter:blur(14px);padding:1.4rem clamp(1.2rem,5vw,2.5rem) 1.8rem;
    gap:1.2rem;border-bottom:1px solid var(--line);margin:0;
  }
  .nav__links.open a{font-size:1.1rem}
  .hero__title em{display:none}
  .foot__top{flex-direction:column}
}
@media(max-width:480px){
  .svc-grid,.stats{grid-template-columns:1fr}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}