/* ============================================================
   LIKE WORLDS · 莱克视界
   Modern minimal, responsive, light theme with dark hero.
   ============================================================ */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  /* Leave space below the sticky/fixed nav when jumping to anchors. */
  scroll-padding-top:80px;
}
section[id]{scroll-margin-top:80px}
@media (max-width:880px){
  html{scroll-padding-top:64px}
  section[id]{scroll-margin-top:64px}
}
body{
  font-family:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  color:var(--c-ink);
  background:var(--c-bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,video,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{list-style:none}

/* ---------- Tokens ---------- */
:root{
  --c-bg:#fafafa;
  --c-bg-alt:#f3f3f1;
  --c-ink:#111111;
  --c-ink-2:#5b5b5b;
  --c-ink-3:#9a9a9a;
  --c-line:#e8e8e6;
  --c-accent:#0a0a0a;
  --c-accent-2:#d9b88b;       /* warm metallic */
  --c-white:#ffffff;

  --maxw:1280px;
  --pad-x:clamp(20px,4vw,56px);
  --rad:14px;
  --rad-sm:8px;

  --t-fast:.18s ease;
  --t-base:.32s cubic-bezier(.2,.7,.2,1);
  --t-slow:.6s cubic-bezier(.2,.7,.2,1);

  --shadow-1:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(0,0,0,.06);
  --shadow-2:0 4px 12px rgba(0,0,0,.08),0 24px 60px rgba(0,0,0,.12);
}

/* ---------- Reveal animation ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1);
  will-change:opacity,transform;
}
[data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  [data-reveal]{opacity:1;transform:none}
}

/* ============================================================
   NAV (desktop horizontal + mobile minimal brand+burger)
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--pad-x);
  background:rgba(255,255,255,0);
  transition:background var(--t-base),box-shadow var(--t-base),padding var(--t-base);
  color:#fff;
}
.nav.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.4) blur(14px);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);
  color:var(--c-ink);
  box-shadow:0 1px 0 rgba(0,0,0,.06);
  padding:12px var(--pad-x);
}

.nav__brand{display:inline-flex;align-items:baseline;gap:10px;letter-spacing:.02em}
.nav__logo{font-family:'Inter',sans-serif;font-weight:700;font-size:22px;letter-spacing:.06em}
.nav__logo sup{font-size:.55em;color:var(--c-accent-2);vertical-align:super;margin-left:1px}
.nav__brand-name{font-size:13px;opacity:.85;letter-spacing:.08em}

/* Desktop horizontal links — hidden on mobile, separate from mobile menu */
.nav__links{display:flex;gap:36px;font-size:14px;letter-spacing:.04em}
.nav__links a{position:relative;padding:6px 0;opacity:.85;transition:opacity var(--t-fast)}
.nav__links a:hover{opacity:1}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform var(--t-base);
}
.nav__links a:hover::after{transform:scaleX(1)}

.nav__actions{display:flex;align-items:center;gap:14px}

.lang-switch{
  display:inline-flex;align-items:center;gap:4px;
  font-size:12px;letter-spacing:.08em;
  padding:7px 12px;border:1px solid currentColor;border-radius:999px;
  opacity:.85;transition:opacity var(--t-fast),background var(--t-fast);
}
.lang-switch:hover{opacity:1}
.lang-switch__opt{opacity:.6;transition:opacity var(--t-fast)}
.lang-switch__opt.is-active{opacity:1;font-weight:600}
.lang-switch__sep{opacity:.4}

/* Burger button — visible on mobile only. Always-visible pill so it shows on
   light AND dark hero backgrounds without ambiguity. */
.nav__burger{
  display:none;
  width:42px;height:42px;
  position:relative;
  border-radius:50%;
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.22);
  color:#fff;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.nav.is-scrolled .nav__burger,
.page-project .nav.nav--solid .nav__burger,
.page-demo .nav.nav--solid .nav__burger{
  background:transparent;color:var(--c-ink);border-color:rgba(0,0,0,.18);
}
.nav.is-scrolled .nav__burger:hover,
.page-project .nav.nav--solid .nav__burger:hover,
.page-demo .nav.nav--solid .nav__burger:hover{background:rgba(0,0,0,.06)}
.nav__burger span{
  position:absolute;left:11px;right:11px;height:1.6px;background:currentColor;border-radius:1px;
  transition:transform var(--t-base),opacity var(--t-fast),top var(--t-base);
}
.nav__burger span:nth-child(1){top:15px}
.nav__burger span:nth-child(2){top:20px}
.nav__burger span:nth-child(3){top:25px}

@media (max-width:880px){
  .nav__links{display:none}            /* hide desktop nav on mobile */
  .nav__burger{display:inline-block}   /* show burger on mobile */
}

/* ============================================================
   MOBILE MENU — independent body-level overlay
   Lives OUTSIDE the .nav element to avoid any z-index /
   backdrop-filter stacking-context traps.
   ============================================================ */
.mm{
  position:fixed;inset:0;
  z-index:9000;
  visibility:hidden;opacity:0;
  transition:opacity .25s ease,visibility 0s linear .25s;
}
.mm.is-open{
  visibility:visible;opacity:1;
  transition:opacity .25s ease;
}
.mm__backdrop{
  position:absolute;inset:0;
  background:rgba(8,8,8,.55);
  -webkit-tap-highlight-color:transparent;
}
.mm__panel{
  position:absolute;top:0;right:0;bottom:0;
  width:min(78%, 340px);
  background:#0a0a0a;color:#fff;
  padding:88px 32px 40px;
  display:flex;flex-direction:column;
  transform:translateX(100%);
  transition:transform .32s cubic-bezier(.2,.7,.2,1);
  box-shadow:-20px 0 60px rgba(0,0,0,.4);
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
}
.mm.is-open .mm__panel{transform:none}
.mm__close{
  position:absolute;top:18px;right:20px;
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  background:transparent;border:0;color:#fff;
  font-size:30px;line-height:1;cursor:pointer;
  border-radius:50%;
  transition:background var(--t-fast);
}
.mm__close:hover{background:rgba(255,255,255,.08)}
.mm__nav{
  display:flex;flex-direction:column;gap:6px;
  margin-bottom:32px;
}
.mm__nav a{
  display:block;
  color:#fff;font-size:22px;font-weight:300;letter-spacing:.02em;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:opacity var(--t-fast),padding-left var(--t-fast);
  opacity:.85;
}
.mm__nav a:hover{opacity:1;padding-left:6px}
.mm__nav a:last-child{border-bottom:0}
.mm__meta{
  margin-top:auto;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:12px;color:rgba(255,255,255,.55);letter-spacing:.05em;
  display:flex;flex-direction:column;gap:6px;
}
.mm__meta a{color:rgba(255,255,255,.85);transition:color var(--t-fast)}
.mm__meta a:hover{color:#fff}

/* Body lock while menu is open — only prevent body scroll on small screens */
body.menu-open{overflow:hidden}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;
  padding:120px var(--pad-x) 80px;
  color:#fff;overflow:hidden;
}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__video{width:100%;height:100%;object-fit:cover}
.hero__overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 30% 40%,rgba(0,0,0,.1),rgba(0,0,0,.55) 70%),
    linear-gradient(180deg,rgba(0,0,0,.25) 0%,rgba(0,0,0,.45) 60%,rgba(0,0,0,.75) 100%);
}
.hero__content{position:relative;z-index:1;max-width:var(--maxw);width:100%;margin:0 auto}
.hero__eyebrow{
  font-size:12px;letter-spacing:.28em;opacity:.75;
  font-weight:500;margin-bottom:28px;
}
.hero__title{
  font-size:clamp(40px,7vw,96px);
  line-height:1.05;font-weight:300;
  letter-spacing:-.01em;margin-bottom:28px;
  max-width:18ch;
}
.hero__title-em{font-weight:600}
.hero__sub{
  font-size:clamp(15px,1.5vw,19px);
  opacity:.85;margin-bottom:44px;max-width:42ch;font-weight:300;
}
.hero__cta{display:flex;gap:16px;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 28px;border-radius:999px;
  font-size:14px;letter-spacing:.04em;font-weight:500;
  transition:transform var(--t-fast),background var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:#fff;color:#0a0a0a}
.btn--primary:hover{background:var(--c-accent-2);color:#0a0a0a}
.btn--ghost{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn--ghost:hover{background:#fff;color:#0a0a0a;border-color:#fff}

.hero__scroll{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  z-index:1;display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.28em;opacity:.7;
}
.hero__scroll i{
  display:block;width:1px;height:36px;background:rgba(255,255,255,.6);
  animation:scrollPulse 2s ease-in-out infinite;transform-origin:top;
}
@keyframes scrollPulse{
  0%,100%{transform:scaleY(.4);opacity:.4}
  50%    {transform:scaleY(1);opacity:1}
}

/* ============================================================
   SECTION GENERIC
   ============================================================ */
.section{padding:clamp(80px,12vw,160px) var(--pad-x);position:relative}
.section--about,.section--clients{background:var(--c-bg)}
.section--services,.section--contact{background:var(--c-bg-alt)}
.section--projects{background:var(--c-bg)}
.section__inner{max-width:var(--maxw);margin:0 auto}

.section__head{margin-bottom:64px;max-width:60ch}
.section__num{
  display:inline-block;font-size:12px;letter-spacing:.3em;
  color:var(--c-ink-3);margin-bottom:18px;
}
.section__num::before{content:"— "}
.section__title{
  font-size:clamp(32px,4.5vw,56px);
  line-height:1.1;font-weight:300;letter-spacing:-.01em;
  color:var(--c-ink);
}
.section__sub{margin-top:18px;color:var(--c-ink-2);font-size:17px;font-weight:300}

/* ============================================================
   ABOUT
   ============================================================ */
.about__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:clamp(40px,6vw,96px);
  align-items:start;
}
.about__lead p{font-size:clamp(16px,1.4vw,19px);color:var(--c-ink-2);font-weight:300;margin-bottom:22px;max-width:54ch}
.about__lead strong{color:var(--c-ink);font-weight:500}
.about__lead em{font-style:normal;color:var(--c-ink);border-bottom:1px dashed var(--c-accent-2);padding-bottom:2px}

.about__stats{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--c-line);border:1px solid var(--c-line);
}
.about__stats li{
  background:var(--c-bg);
  padding:36px 28px;display:flex;flex-direction:column;gap:8px;
}
.about__num{
  font-size:clamp(34px,4vw,52px);font-weight:400;letter-spacing:-.02em;color:var(--c-ink);
  font-family:'Inter',sans-serif;display:flex;align-items:baseline;
}
.about__num span{font-size:.55em;color:var(--c-accent-2);margin-left:2px}
.about__label{font-size:13px;letter-spacing:.06em;color:var(--c-ink-2)}

@media (max-width:780px){
  .about__grid{grid-template-columns:1fr}
}

/* ============================================================
   SERVICES
   ============================================================ */
.services__grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--c-line);border:1px solid var(--c-line);
}
.service{
  background:var(--c-bg-alt);
  padding:44px 36px;
  transition:background var(--t-base);
  display:flex;flex-direction:column;gap:14px;
}
.service:hover{background:var(--c-white)}
.service__icon{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  color:var(--c-ink);margin-bottom:8px;
}
.service__icon svg{width:32px;height:32px}
.service h3{font-size:20px;font-weight:500;color:var(--c-ink)}
.service p{font-size:15px;color:var(--c-ink-2);font-weight:300;line-height:1.65}

@media (max-width:960px){.services__grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.services__grid{grid-template-columns:1fr}}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects__filter{
  display:flex;gap:10px;flex-wrap:wrap;margin-bottom:44px;
}
.chip{
  padding:10px 20px;font-size:13px;letter-spacing:.06em;
  border:1px solid var(--c-line);border-radius:999px;
  color:var(--c-ink-2);background:transparent;
  transition:all var(--t-fast);
}
.chip:hover{border-color:var(--c-ink);color:var(--c-ink)}
.chip.is-active{background:var(--c-ink);color:#fff;border-color:var(--c-ink)}

.projects__grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.project{
  position:relative;cursor:pointer;
  overflow:hidden;border-radius:var(--rad);
  background:#000;
  aspect-ratio:4/3;
  transition:transform var(--t-base),box-shadow var(--t-base);
  will-change:transform;
}
.project:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.project__img{
  position:absolute;inset:0;
  width:100%;height:100%;object-fit:cover;
  transition:transform .8s cubic-bezier(.2,.7,.2,1),filter var(--t-base);
}
.project:hover .project__img{transform:scale(1.06);filter:brightness(.85)}
.project__overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,0) 30%,rgba(0,0,0,.85) 100%);
}
.project__info{
  position:absolute;left:24px;right:24px;bottom:22px;color:#fff;z-index:1;
}
.project__tag{font-size:11px;letter-spacing:.24em;opacity:.85;margin-bottom:8px;text-transform:uppercase}
.project__name{font-size:20px;font-weight:500;line-height:1.3;margin-bottom:4px}
.project__client{font-size:13px;opacity:.75;font-weight:300}
.project__arrow{
  position:absolute;top:20px;right:20px;width:36px;height:36px;
  border-radius:50%;background:rgba(255,255,255,.15);backdrop-filter:blur(8px);
  display:flex;align-items:center;justify-content:center;color:#fff;
  transform:translateY(-4px);opacity:0;transition:all var(--t-base);
  z-index:1;
}
.project:hover .project__arrow{transform:none;opacity:1}
.project__badge{
  position:absolute;top:20px;left:20px;z-index:1;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:999px;
  background:rgba(0,0,0,.55);backdrop-filter:blur(6px);
  color:#fff;font-size:10px;letter-spacing:.18em;font-weight:600;
}
.project__badge svg{opacity:.9}

@media (max-width:960px){.projects__grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.projects__grid{grid-template-columns:1fr;gap:20px}}

.project.is-hidden{display:none}

/* ============================================================
   CLIENTS
   ============================================================ */
.clients__list{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:var(--c-line);border:1px solid var(--c-line);
}
.clients__list li{
  background:var(--c-bg);padding:32px 22px;text-align:center;
  font-size:14px;color:var(--c-ink-2);letter-spacing:.02em;
  transition:background var(--t-fast),color var(--t-fast);
}
.clients__list li:hover{background:#fff;color:var(--c-ink)}

@media (max-width:880px){.clients__list{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.clients__list{grid-template-columns:repeat(2,1fr)}}

/* ============================================================
   CONTACT
   ============================================================ */
.contact__grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.contact__card{
  display:flex;flex-direction:column;gap:10px;
  padding:36px 32px;background:var(--c-bg);
  border:1px solid var(--c-line);border-radius:var(--rad);
  transition:all var(--t-base);
}
a.contact__card:hover{
  background:var(--c-ink);color:#fff;border-color:var(--c-ink);
  transform:translateY(-3px);box-shadow:var(--shadow-2);
}
.contact__label{font-size:12px;letter-spacing:.22em;color:var(--c-ink-3);text-transform:uppercase}
a.contact__card:hover .contact__label{color:var(--c-accent-2)}
.contact__value{font-size:clamp(18px,2vw,22px);font-weight:500;letter-spacing:.01em}

@media (max-width:780px){.contact__grid{grid-template-columns:1fr}}

/* ---------- Inquiry form ---------- */
.form-wrap{
  margin-top:72px;
  display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(40px,6vw,80px);
  align-items:start;
}
.form-wrap__head{padding-top:6px}
.form-wrap__eyebrow{font-size:12px;letter-spacing:.3em;color:var(--c-ink-3);margin-bottom:14px}
.form-wrap__title{font-size:clamp(24px,3vw,34px);font-weight:400;line-height:1.25;color:var(--c-ink);margin-bottom:14px;letter-spacing:-.01em}
.form-wrap__sub{color:var(--c-ink-2);font-size:15px;font-weight:300;max-width:34ch}

.form{display:flex;flex-direction:column;gap:18px}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field__label{font-size:12px;letter-spacing:.18em;color:var(--c-ink-2);text-transform:uppercase}
.field input,.field select,.field textarea{
  font:inherit;color:var(--c-ink);
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--rad-sm);
  padding:14px 16px;
  width:100%;
  transition:border-color var(--t-fast),box-shadow var(--t-fast),background var(--t-fast);
  font-size:15px;
  font-family:inherit;
}
.field textarea{resize:vertical;min-height:120px;line-height:1.6}
.field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none' stroke='%23111' stroke-width='1.5'><path d='M1 1l5 5 5-5'/></svg>");background-repeat:no-repeat;background-position:right 16px center;padding-right:42px;cursor:pointer}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-ink);
  box-shadow:0 0 0 4px rgba(10,10,10,.06);
}
.field input::placeholder,.field textarea::placeholder{color:var(--c-ink-3)}
.field input:user-invalid,
.field select:user-invalid,
.field textarea:user-invalid{border-color:#c64545}

.form__foot{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:8px}

.btn--dark{background:var(--c-ink);color:#fff;border:1px solid var(--c-ink)}
.btn--dark:hover{background:#000}
.btn--dark[disabled]{opacity:.55;cursor:wait;transform:none}

.form__status{font-size:13px;color:var(--c-ink-2);min-height:1.4em;letter-spacing:.02em;flex:1}
.form__status.is-success{color:#1f7a44}
.form__status.is-error{color:#c64545}

@media (max-width:880px){
  .form-wrap{grid-template-columns:1fr;gap:40px}
}
@media (max-width:520px){
  .form__row{grid-template-columns:1fr}
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{
  background:#0a0a0a;color:#aaa;padding:48px var(--pad-x);
}
.footer__inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;font-size:13px;
}
.footer__brand{display:flex;align-items:baseline;gap:14px;color:#fff}
.footer__brand .nav__logo{font-size:18px}
.footer__meta{display:flex;gap:24px;flex-wrap:wrap;align-items:center}
.footer__meta a{transition:color var(--t-fast)}
.footer__meta a:hover{color:#fff}

/* ============================================================
   MODAL
   ============================================================ */
.modal{
  position:fixed;inset:0;z-index:100;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  opacity:0;pointer-events:none;
  transition:opacity var(--t-base);
}
.modal.is-open{opacity:1;pointer-events:auto}
.modal__backdrop{
  position:absolute;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(8px);
}
.modal__panel{
  position:relative;z-index:1;
  width:min(960px,100%);max-height:90vh;
  background:#fff;border-radius:var(--rad);overflow:hidden;
  display:grid;grid-template-rows:auto 1fr;
  transform:translateY(20px) scale(.98);
  transition:transform var(--t-base);
  box-shadow:0 30px 80px rgba(0,0,0,.4);
}
.modal.is-open .modal__panel{transform:none}
.modal__close{
  position:absolute;top:14px;right:14px;z-index:2;
  width:40px;height:40px;border-radius:50%;
  background:rgba(255,255,255,.9);color:#000;
  font-size:24px;line-height:1;
  display:flex;align-items:center;justify-content:center;
}
.modal__close:hover{background:#fff}
.modal__media{aspect-ratio:16/9;background:#000;overflow:hidden}
.modal__media img{width:100%;height:100%;object-fit:cover}
.modal__body{padding:32px 36px 40px;overflow-y:auto}
.modal__tag{font-size:11px;letter-spacing:.24em;color:var(--c-accent-2);text-transform:uppercase;margin-bottom:10px}
.modal__title{font-size:clamp(22px,3vw,30px);font-weight:500;margin-bottom:18px;color:var(--c-ink);line-height:1.3}
.modal__desc{font-size:15px;color:var(--c-ink-2);line-height:1.75;font-weight:300;white-space:pre-line}
.modal__client{margin-top:18px;font-size:13px;color:var(--c-ink-3);letter-spacing:.04em}

@media (max-width:600px){
  .modal__panel{max-height:94vh}
  .modal__body{padding:24px 22px 30px}
}

/* ============================================================
   PROJECT DETAIL PAGE (editorial-style layout)
   Class prefix: pp- (project page)
   ============================================================ */
.page-project{background:var(--c-bg)}
.page-project .nav.nav--solid{
  position:sticky;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.4) blur(14px);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);
  color:var(--c-ink);
  box-shadow:0 1px 0 rgba(0,0,0,.06);
  padding:14px var(--pad-x);
}
.page-project .nav.nav--solid .nav__links a{color:var(--c-ink)}

/* ---------- HERO (full-bleed) ---------- */
.pp-hero{
  position:relative;
  height:clamp(560px,82vh,820px);
  overflow:hidden;
  color:#fff;
}
.pp-hero__media{position:absolute;inset:0;margin:0}
.pp-hero__media img{width:100%;height:100%;object-fit:cover}
.pp-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(0,0,0,.25) 0%,rgba(0,0,0,.1) 35%,rgba(0,0,0,.75) 100%);
}
.pp-hero__content{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:0 var(--pad-x) clamp(40px,6vw,72px);
  max-width:var(--maxw);margin:0 auto;
}
.pp-hero__back{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;
  padding:8px 14px 8px 10px;border:1px solid rgba(255,255,255,.4);border-radius:999px;
  margin-bottom:28px;
  color:#fff;opacity:.85;
  transition:background var(--t-fast),opacity var(--t-fast);
}
.pp-hero__back:hover{opacity:1;background:rgba(255,255,255,.1)}
.pp-hero__loc{
  font-size:12px;letter-spacing:.32em;
  opacity:.85;margin-bottom:18px;text-transform:uppercase;
}
.pp-hero__title{
  font-size:clamp(36px,6.5vw,84px);
  font-weight:300;letter-spacing:-.015em;
  line-height:1.05;max-width:18ch;
}

@media (max-width:600px){
  .pp-hero{height:78vh;min-height:520px}
  .pp-hero__back{margin-bottom:20px}
}

/* ---------- INTRO ---------- */
.pp-intro{padding:clamp(80px,10vw,140px) var(--pad-x)}
.pp-intro__inner{max-width:780px;margin:0 auto}
.pp-intro__lede{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:300;line-height:1.45;letter-spacing:-.005em;
  color:var(--c-ink);
  margin-bottom:clamp(40px,5vw,64px);
}
.pp-intro__desc p{
  font-size:clamp(15px,1.2vw,17px);
  font-weight:300;line-height:1.85;color:var(--c-ink-2);
  margin-bottom:1.4em;
}
.pp-intro__desc p:last-child{margin-bottom:0}

/* ---------- FEATURE IMAGE ---------- */
.pp-feature{
  margin:0 0 clamp(80px,10vw,120px);
  padding:0 var(--pad-x);
  max-width:1600px;margin-left:auto;margin-right:auto;
}
.pp-feature img{
  width:100%;height:auto;display:block;
  border-radius:var(--rad);
  box-shadow:0 12px 40px rgba(0,0,0,.08);
}

/* ---------- SECTION wrapper (videos / gallery) ---------- */
.pp-section{padding:clamp(60px,8vw,110px) var(--pad-x)}
.pp-section--videos{background:var(--c-bg-alt)}
.pp-section--gallery{background:var(--c-bg)}
.pp-section__inner{max-width:var(--maxw);margin:0 auto}
.pp-section__head{margin-bottom:clamp(40px,5vw,64px)}
.pp-section__title{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:300;letter-spacing:-.01em;
  color:var(--c-ink);
}

/* ---------- VIDEOS — adaptive grid ---------- */
.pp-videos{display:grid;gap:clamp(28px,3vw,40px)}
.pp-videos--solo{grid-template-columns:1fr}
.pp-videos--duo{grid-template-columns:1fr}                /* stacked, both full-width */
.pp-videos--multi{grid-template-columns:repeat(2,1fr)}    /* 2-col on desktop */

.pp-video{margin:0}
.pp-video video{
  width:100%;display:block;
  background:#000;border-radius:var(--rad);
  aspect-ratio:16/9;object-fit:cover;
  box-shadow:0 10px 30px rgba(0,0,0,.08);
}
.pp-video figcaption{
  margin-top:14px;display:flex;align-items:baseline;gap:14px;
  padding:0 4px;
}
.pp-video__num{
  font-size:11px;letter-spacing:.22em;color:var(--c-ink-3);
}
.pp-video__name{
  font-size:14px;color:var(--c-ink);font-weight:500;letter-spacing:.01em;
}

/* odd-count: first video full-width */
.pp-videos--multi .pp-video:nth-child(odd):last-child{grid-column:1 / -1}

@media (max-width:780px){
  .pp-videos--multi{grid-template-columns:1fr}
}

/* ---------- GALLERY — adaptive grid ---------- */
.pp-gallery{display:grid;gap:14px}
.pp-gallery--solo{grid-template-columns:1fr;max-width:1100px;margin:0 auto}
.pp-gallery--duo{grid-template-columns:repeat(2,1fr)}
.pp-gallery--quad{grid-template-columns:repeat(2,1fr)}
.pp-gallery--multi{grid-template-columns:repeat(3,1fr)}

.pp-gallery__item{
  position:relative;padding:0;border:0;background:#000;
  border-radius:var(--rad-sm);overflow:hidden;cursor:zoom-in;
  aspect-ratio:4/3;
  transition:transform var(--t-base);
}
.pp-gallery__item:hover{transform:translateY(-3px)}
.pp-gallery__item img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .8s cubic-bezier(.2,.7,.2,1);
}
.pp-gallery__item:hover img{transform:scale(1.06)}
.pp-gallery--solo .pp-gallery__item{aspect-ratio:16/9}

@media (max-width:880px){
  .pp-gallery--multi{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:520px){
  .pp-gallery--duo,
  .pp-gallery--quad,
  .pp-gallery--multi{grid-template-columns:1fr}
}

/* ---------- CREDITS strip (bottom metadata) ---------- */
.pp-credits{
  padding:clamp(48px,6vw,72px) var(--pad-x);
  border-top:1px solid var(--c-line);
}
.pp-credits__inner{max-width:var(--maxw);margin:0 auto}
.pp-credits dl{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.pp-credits dl > div{display:flex;flex-direction:column;gap:8px}
.pp-credits dt{
  font-size:11px;letter-spacing:.24em;color:var(--c-ink-3);
  text-transform:uppercase;font-weight:500;
}
.pp-credits dd{
  font-size:15px;color:var(--c-ink);font-weight:400;line-height:1.5;
}
@media (max-width:780px){
  .pp-credits dl{grid-template-columns:repeat(2,1fr);gap:24px}
}
@media (max-width:420px){
  .pp-credits dl{grid-template-columns:1fr;gap:18px}
}

/* ---------- NEXT / PREV ---------- */
.pp-nav{padding:0 var(--pad-x);max-width:var(--maxw);margin:0 auto}
.pp-nav__inner{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border-top:1px solid var(--c-line);
}
.pp-nav__card{
  display:flex;flex-direction:column;gap:10px;
  padding:36px 32px;
  transition:background var(--t-base),color var(--t-base);
}
.pp-nav__card:hover{background:var(--c-ink);color:#fff}
.pp-nav__card--next{text-align:right;align-items:flex-end;border-left:1px solid var(--c-line)}
.pp-nav__label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;letter-spacing:.24em;color:var(--c-ink-3);text-transform:uppercase;
}
.pp-nav__card:hover .pp-nav__label{color:var(--c-accent-2)}
.pp-nav__name{font-size:18px;font-weight:500;letter-spacing:-.005em}

@media (max-width:600px){
  .pp-nav__inner{grid-template-columns:1fr}
  .pp-nav__card{padding:24px var(--pad-x)}
  .pp-nav__card--next{text-align:left;align-items:flex-start;border-left:0;border-top:1px solid var(--c-line)}
}

/* ---------- CTA strip ---------- */
.pp-cta{background:#0a0a0a;color:#fff;padding:clamp(64px,8vw,100px) var(--pad-x);margin-top:0}
.pp-cta__inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.pp-cta h3{font-size:clamp(22px,2.6vw,32px);font-weight:300;letter-spacing:-.01em;max-width:30ch}
@media (max-width:600px){.pp-cta__inner{flex-direction:column;align-items:flex-start}}

/* ----- Lightbox ----- */
.lightbox{
  position:fixed;inset:0;z-index:100;
  background:rgba(0,0,0,.92);
  display:flex;align-items:center;justify-content:center;
  padding:48px 64px;
  opacity:0;pointer-events:none;
  transition:opacity var(--t-base);
}
.lightbox.is-open{opacity:1;pointer-events:auto}
.lightbox__figure{margin:0;max-width:100%;max-height:100%;display:flex;flex-direction:column;gap:14px;align-items:center}
.lightbox__figure img{max-width:100%;max-height:calc(100vh - 160px);object-fit:contain;border-radius:6px}
.lightbox__figure figcaption{color:rgba(255,255,255,.7);font-size:13px;letter-spacing:.04em}
.lightbox__close{
  position:absolute;top:18px;right:24px;
  width:42px;height:42px;border-radius:50%;
  background:rgba(255,255,255,.1);color:#fff;font-size:28px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:background var(--t-fast);
}
.lightbox__close:hover{background:rgba(255,255,255,.2)}
.lightbox__nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,.1);color:#fff;font-size:30px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:background var(--t-fast);
}
.lightbox__nav:hover{background:rgba(255,255,255,.2)}
.lightbox__nav--prev{left:18px}
.lightbox__nav--next{right:18px}
@media (max-width:600px){
  .lightbox{padding:24px}
  .lightbox__nav{width:38px;height:38px;font-size:24px}
}

/* ============================================================
   DEMO PAGE (operation video showcase)
   ============================================================ */
.page-demo{background:var(--c-bg)}
.page-demo .nav.nav--solid{position:sticky;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);color:var(--c-ink);box-shadow:0 1px 0 rgba(0,0,0,.06);padding:14px var(--pad-x)}
.page-demo .nav.nav--solid .nav__links a{color:var(--c-ink)}

/* Hero: video background + brand gradient overlay (matches index hero treatment) */
.demo-hero{
  position:relative;
  padding:clamp(140px,18vw,200px) var(--pad-x) clamp(80px,10vw,120px);
  color:#fff;overflow:hidden;
  isolation:isolate;
}
.demo-hero__media{position:absolute;inset:0;z-index:-1}
.demo-hero__video{width:100%;height:100%;object-fit:cover;display:block}
.demo-hero__overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 100% 80% at 30% 40%,rgba(10,10,10,.45),rgba(10,10,10,.85) 70%),
    linear-gradient(180deg,rgba(10,10,10,.35) 0%,rgba(10,10,10,.55) 50%,rgba(10,10,10,.92) 100%);
}
.demo-hero__grain{
  position:absolute;inset:0;opacity:.05;mix-blend-mode:overlay;pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence baseFrequency='.95' numOctaves='2' seed='5'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 .6 0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}
.demo-hero__inner{max-width:880px;margin:0 auto;position:relative}
.demo-hero__eyebrow{font-size:12px;letter-spacing:.32em;opacity:.85;margin-bottom:24px;font-weight:500;color:var(--c-accent-2)}
.demo-hero__title{font-size:clamp(40px,6.5vw,80px);font-weight:300;letter-spacing:-.015em;line-height:1.05;margin-bottom:26px}
.demo-hero__sub{font-size:clamp(15px,1.4vw,18px);font-weight:300;line-height:1.75;opacity:.88;max-width:62ch;margin-bottom:36px}
.demo-hero__meta{display:flex;flex-wrap:wrap;gap:10px}
.demo-hero__chip{
  display:inline-flex;align-items:center;
  padding:7px 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.28);
  font-size:12px;letter-spacing:.04em;
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(8px);
}

/* List + cards: text ABOVE video for editorial reading flow */
.demo-list{padding:clamp(80px,10vw,140px) var(--pad-x);background:var(--c-bg)}
.demo-list__inner{max-width:var(--maxw);margin:0 auto;display:flex;flex-direction:column;gap:clamp(80px,10vw,140px)}

.demo-card{display:flex;flex-direction:column;gap:clamp(28px,3.5vw,48px)}

.demo-card__meta{
  display:flex;flex-direction:column;gap:14px;
  max-width:840px;
  padding-bottom:6px;
  border-bottom:1px solid var(--c-line);
}
.demo-card__header{
  display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;
}
.demo-card__num{font-size:11px;letter-spacing:.32em;color:var(--c-ink-3);font-weight:500}
.demo-card__tag{font-size:11px;letter-spacing:.24em;color:var(--c-accent-2);text-transform:uppercase}
.demo-card__name{
  font-size:clamp(24px,3vw,38px);font-weight:400;
  letter-spacing:-.01em;line-height:1.25;color:var(--c-ink);
  margin:6px 0 8px;
}
.demo-card__desc{font-size:clamp(15px,1.25vw,17px);line-height:1.8;color:var(--c-ink-2);font-weight:300;max-width:62ch}

.demo-card__media{
  position:relative;background:#000;border-radius:var(--rad);overflow:hidden;
  box-shadow:0 16px 50px rgba(0,0,0,.12);
}
.demo-card__media video{
  width:100%;display:block;aspect-ratio:16/9;object-fit:cover;background:#000;
}

@media (max-width:600px){
  .demo-hero{padding:96px var(--pad-x) 56px}
  .demo-hero__eyebrow{font-size:11px;letter-spacing:.28em;margin-bottom:18px}
  .demo-hero__title{font-size:clamp(32px,9vw,44px);margin-bottom:18px}
  .demo-hero__sub{font-size:14.5px;line-height:1.7;margin-bottom:24px}
  .demo-hero__meta{gap:8px}
  .demo-hero__chip{padding:6px 12px;font-size:11px}
  .demo-list{padding:60px var(--pad-x)}
  .demo-list__inner{gap:64px}
  .demo-card{gap:22px}
  .demo-card__header{gap:12px}
  .demo-card__name{font-size:22px;margin:2px 0 4px;line-height:1.3}
  .demo-card__desc{font-size:14.5px;line-height:1.75}
  .demo-card__meta{gap:10px;padding-bottom:4px}
}

/* Loading state */
.demo-loading{
  display:flex;flex-direction:column;align-items:center;gap:18px;
  padding:80px 0;color:var(--c-ink-3);font-size:14px;
}
.demo-loading__spinner{
  width:36px;height:36px;border-radius:50%;
  border:2px solid var(--c-line);border-top-color:var(--c-ink);
  animation:demoSpin 1s linear infinite;
}
@keyframes demoSpin{to{transform:rotate(360deg)}}

.demo-error{
  display:flex;flex-direction:column;align-items:center;gap:24px;
  padding:60px 20px;color:var(--c-ink-2);text-align:center;
}

/* ============================================================
   HERO CAROUSEL (multi-video)
   ============================================================ */
.hero__media .hero__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 1.2s ease}
.hero__media .hero__video.is-active{opacity:1}
.hero__indicators{
  position:absolute;left:50%;bottom:96px;transform:translateX(-50%);
  display:flex;gap:8px;z-index:2;
}
.hero__dot{
  width:24px;height:2px;background:rgba(255,255,255,.35);
  cursor:pointer;border-radius:2px;
  transition:background var(--t-fast),width var(--t-base);
}
.hero__dot:hover{background:rgba(255,255,255,.6)}
.hero__dot.is-active{background:#fff;width:36px}
@media (max-width:600px){.hero__indicators{bottom:74px}}

/* ============================================================
   Helpers
   ============================================================ */
.lang-en .lang-zh,.lang-zh .lang-en{display:none}