/* TWENTI20S — punch 2026-10-29 mobile+AI */
* { margin:0; padding:0; box-sizing:border-box; }
:root {
  --bg:#000; --fg:#fff; --muted:#777; --panel:#fff; --ink:#222;
  --font-en: "PingFang SC", PingFang, "Source Sans Pro", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-zh: "PingFang TC", PingFang, "Noto Sans TC", "Source Sans Pro", -apple-system, sans-serif;
  --font-cn: "PingFang SC", PingFang, "Noto Sans SC", "Source Sans Pro", -apple-system, sans-serif;
}
html { scroll-behavior:smooth; font-size:16px; -webkit-font-smoothing:antialiased; }
body { background:var(--bg); color:var(--fg); font-family:var(--font-en); overflow-x:hidden; line-height:1.55; }
body.lang-zh { font-family:var(--font-zh); }
body.lang-cn { font-family:var(--font-cn); }
a { color:inherit; text-decoration:none; transition:opacity .3s; }
img, video { max-width:100%; display:block; }
.container { width:100%; min-height:100vh; position:relative; }

/* Header — light by default (black logo); fixed always incl. mobile */
header {
  position:fixed; top:0; left:0; width:100%; z-index:100;
  padding:12px 48px;
  background:rgba(255,255,255,.96); color:#000;
  border-bottom:1px solid rgba(0,0,0,.06);
}
body.over-dark .logo img { filter: invert(1); }
body.over-dark header {
  background:rgba(0,0,0,.88); color:#fff;
  border-bottom-color:rgba(255,255,255,.08);
}
.nav-bar { display:flex; justify-content:space-between; align-items:center; gap:16px; }
.logo { position:relative; }
.logo img { height:32px; width:auto; }
.mobile-logo { display:none; }

.menu-container { display:flex; align-items:center; gap:16px; }
.menu { display:flex; list-style:none; gap:28px; align-items:center; }
.menu-item a { font-weight:600; font-size:16px; opacity:.85; }
.menu-item a:hover { opacity:1; text-decoration:underline; text-underline-offset:4px; }
.menu-item a.active { opacity:1; text-decoration:underline; text-underline-offset:4px; }

.language-switcher { display:flex; gap:10px; font-size:13px; font-weight:700; align-items:center; }
.language-switcher a.active { text-decoration:underline; text-underline-offset:3px; }
.lang-mobile { display:none; } /* shown only on mobile */

/* CSS hamburger — 44×44 tap */
.mobile-menu-icon {
  display:none; cursor:pointer; border:0; background:transparent;
  width:44px; height:44px; padding:10px; margin:0;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
  color:inherit;
}
.mobile-menu-icon .bar {
  display:block; width:22px; height:2px; background:currentColor; border-radius:1px;
}
body.over-dark .mobile-menu-icon { color:#fff; }

.dialog {
  display:none; position:fixed; inset:0; background:rgba(0,0,0,.92);
  z-index:200; flex-direction:column; justify-content:center; align-items:center; gap:36px;
  color:#fff;
}
.dialog.open { display:flex; }
.m-menu-item a { font-size:28px; font-weight:300; }
.dialog .language-switcher { font-size:16px; gap:18px; }
.close-icon-btn {
  position:absolute; top:12px; right:16px; width:44px; height:44px;
  border:0; background:transparent; color:#fff; cursor:pointer; font-size:28px; line-height:1;
}

/* FULL-BLEED slides */
.hero, .slide {
  position:relative; width:100%;
  min-height:100vh; min-height:100dvh;
  display:flex; align-items:center; justify-content:center;
  text-align:center; padding:120px 24px 80px; overflow:hidden;
  background:#000;
}
.hero-video, .slide-media, .slide-media video, .slide-media img {
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0;
}
.hero::after, .slide::after {
  content:""; position:absolute; inset:0; z-index:1; background:rgba(0,0,0,.42);
}
.hero-content, .slide-content {
  position:relative; z-index:2; max-width:min(960px, 92vw); margin:0 auto;
}
.hero-content h1, .slide-content h1 {
  font-size:clamp(28px, 5.8vw, 68px); font-weight:700; letter-spacing:.06em;
  line-height:1.12; text-transform:uppercase; margin:0 auto 18px;
}
.hero-content h2, .slide-content .sub {
  font-size:clamp(13px, 1.8vw, 18px); font-weight:400; letter-spacing:.22em; opacity:.85;
}
.slide-content p {
  color:rgba(255,255,255,.88); margin:12px auto 28px; max-width:46ch;
  font-size:clamp(14px, 1.5vw, 17px); letter-spacing:0; text-transform:none; font-weight:400;
}
.btn {
  display:inline-block; border:1px solid #fff; padding:12px 28px;
  font-weight:600; letter-spacing:.08em; font-size:12px; text-transform:uppercase;
}
.btn:hover { background:#fff; color:#000; }

/* WORK */
.work-light { background:var(--panel); color:var(--ink); }
.work-platforms { background:#fff; padding:72px 8vw 56px; text-align:center; }
.work-platforms img { width:min(1100px, 100%); margin:0 auto; height:auto; }
.work-block {
  background:#fff; color:#333; padding:64px 8vw 72px;
  max-width:1200px; margin:0 auto;
}
.work-block .wb-head { display:flex; align-items:center; gap:14px; margin-bottom:14px; }
.work-block .wb-head h2 {
  font-size:clamp(22px, 3vw, 34px); font-weight:300; letter-spacing:.12em;
  text-transform:uppercase; color:#444;
}
.work-block .wb-desc {
  color:#777; max-width:72ch; margin-bottom:36px; font-size:14px; line-height:1.7;
}
.work-phones { width:100%; margin:0 auto 28px; }
.work-cols { display:grid; grid-template-columns:repeat(3, 1fr); gap:28px 36px; }
.work-col h3 {
  font-size:13px; font-weight:600; letter-spacing:.04em; text-transform:uppercase;
  margin:0 0 12px; color:#222; line-height:1.35;
}
.work-col ul { list-style:none; }
.work-col li {
  position:relative; padding-left:14px; margin-bottom:8px;
  font-size:13px; color:#666; line-height:1.45;
}
.work-col li::before {
  content:""; position:absolute; left:0; top:.55em;
  width:5px; height:5px; border-radius:50%; background:#999;
}
.why-grid {
  display:grid; grid-template-columns:repeat(2, 1fr); gap:40px 48px;
  padding:80px 8vw 100px; background:#fff; color:#333; max-width:1100px; margin:0 auto;
}
.why-grid h2 { grid-column:1/-1; font-weight:300; letter-spacing:.1em; font-size:28px; margin-bottom:8px; }
.why-item h3 { font-size:14px; letter-spacing:.08em; margin-bottom:10px; text-transform:uppercase; }
.why-item p { color:#777; font-size:14px; line-height:1.65; }

.about-slide .slide-content { max-width:min(680px, 90vw); }
.about-slide .slide-content h1 {
  font-size:clamp(26px, 4vw, 42px); font-weight:300; letter-spacing:.14em; margin-bottom:22px;
}
.about-slide .slide-content p {
  font-size:clamp(14px, 1.45vw, 16px); line-height:1.7; max-width:58ch; text-transform:none; letter-spacing:0;
}

.contact-page {
  padding:140px 8vw 100px; min-height:100vh;
  display:grid; grid-template-columns:minmax(240px,360px) 1fr; gap:48px; align-items:start;
  background:#fff; color:#222;
}
.contact-info h1 { font-size:clamp(28px,4vw,40px); margin-bottom:32px; font-weight:300; letter-spacing:.08em; color:#111; }
.contact-info .row { margin-bottom:20px; color:#666; }
.contact-info .row strong { display:block; color:#111; font-weight:600; margin-bottom:4px; }
.contact-info a { color:#111; text-decoration:underline; }
.contact-qr { margin-top:8px; width:110px; height:auto; border:1px solid #eee; }
.contact-map { min-height:280px; background:#ececec; border-radius:4px; overflow:hidden; }
.contact-map img { width:100%; height:auto; object-fit:contain; object-position:center; display:block; }
.contact-map .map-mobile { display:none; }

footer { border-top:1px solid #222; padding:48px 8vw 24px; background:#000; color:#fff; }
.footer-content { display:flex; flex-wrap:wrap; gap:40px; justify-content:space-between; }
.footer-logo img { height:30px; margin-bottom:16px; width:auto; }
.footer-links { display:flex; flex-wrap:wrap; gap:48px; }
.footer-column h3 { font-size:12px; letter-spacing:.1em; margin-bottom:12px; opacity:.65; text-transform:uppercase; }
.footer-column ul { list-style:none; }
.footer-column li { margin-bottom:8px; font-size:14px; }
.footer-column a:hover { text-decoration:underline; }
.footer-bottom { margin-top:32px; padding-top:16px; border-top:1px solid #222; color:#666; font-size:12px; }

@media (max-width: 900px) {
  header {
    position:fixed; top:0; left:0; width:100%; z-index:100;
    padding:8px 14px; background:#fff; color:#000;
  }
  body.over-dark .logo img { filter: invert(1); }
body.over-dark header { background:#000; color:#fff; }
  .menu { display:none; } /* desktop nav hidden — lang kept via .lang-mobile */
  .lang-mobile {
    display:flex; gap:10px; font-size:13px; font-weight:700; align-items:center;
  }
  .mobile-menu-icon { display:flex; }
  .desktop-logo { display:none; }
  .mobile-logo { display:block; height:26px; }
  .logo img { height:26px; }
  .hero, .slide { min-height:100vh; min-height:100dvh; padding:100px 18px 56px; }
  .work-cols { grid-template-columns:1fr; gap:32px; }
  .why-grid { grid-template-columns:1fr; padding:48px 18px 72px; }
  .work-block, .work-platforms { padding-left:18px; padding-right:18px; }
  .contact-page { grid-template-columns:1fr; padding:80px 18px 72px; }
  .contact-map .map-pc { display:none; }
  .contact-map .map-mobile { display:block; }
  footer { padding-left:18px; padding-right:18px; }
  /* pad content under fixed header */
  main { padding-top:0; }
}
/* deploy-fix-20261029c-ai-first-logo */