/* ============================================================
   李淳 Portfolio — Apple / DJI inspired scroll-reveal site
   ============================================================ */

:root{
  --bg:#070709;
  --bg-soft:#0e0e11;
  --text:#f5f5f7;
  --text-dim:#a1a1a8;
  --text-faint:#6a6a72;
  --line:rgba(255,255,255,.08);
  --accent:#d8b678;
  --accent-soft:rgba(216,182,120,.14);
  --radius:22px;
  --ease:cubic-bezier(.22,1,.36,1);
  --maxw:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  background:var(--bg);color:var(--text);
  font-family:'Inter','PingFang SC','Helvetica Neue',-apple-system,BlinkMacSystemFont,'Microsoft YaHei',sans-serif;
  font-weight:400;line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 40px}

.grain{
  position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.03;mix-blend-mode:overlay;
  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='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.progress-bar{
  position:fixed;top:0;left:0;height:2px;width:0%;z-index:9999;
  background:linear-gradient(90deg,var(--accent),#fff);transition:width .08s linear;
}

/* ---------- shared ---------- */
.section{padding:140px 0;position:relative}
.section-tag{
  font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:20px;
}
.section-title{
  font-size:clamp(34px,5vw,56px);font-weight:700;letter-spacing:-.02em;
  line-height:1.12;margin-bottom:18px;
}
.section-title.light,.section-tag.light{color:inherit}
.section-desc{font-size:18px;color:var(--text-dim);max-width:560px}
.section-desc.light{color:rgba(255,255,255,.7)}

/* Strong scroll reveals — start blank-ish, settle into place */
.reveal{
  opacity:0;
  transform:translate3d(0, 90px, 0) scale(.92);
  filter:blur(12px);
  transition:
    opacity 1.15s var(--ease),
    transform 1.25s var(--ease),
    filter 1.15s var(--ease);
  will-change:transform, opacity, filter;
}
.reveal.is-visible{
  opacity:1;
  transform:translate3d(0, 0, 0) scale(1);
  filter:blur(0);
}
.reveal--left{
  transform:translate3d(-100px, 40px, 0) scale(.9);
}
.reveal--right{
  transform:translate3d(100px, 40px, 0) scale(.9);
}
.reveal--up{
  transform:translate3d(0, 120px, 0) scale(.88);
}
.reveal--scale{
  transform:translate3d(0, 40px, 0) scale(.8);
}
.reveal--left.is-visible,
.reveal--right.is-visible,
.reveal--up.is-visible,
.reveal--scale.is-visible{
  transform:translate3d(0, 0, 0) scale(1);
}

/* nested pieces inside a revealed parent */
.reveal-child{
  opacity:0;
  transform:translate3d(0, 48px, 0);
  filter:blur(8px);
  transition:
    opacity .9s var(--ease),
    transform 1s var(--ease),
    filter .9s var(--ease);
}
.reveal.is-visible .reveal-child,
.reveal-child.is-visible{
  opacity:1;
  transform:translate3d(0, 0, 0);
  filter:blur(0);
}

.fade-up{opacity:0;transform:translateY(28px);animation:fadeUp 1.1s var(--ease) forwards}
.delay-1{animation-delay:.12s}.delay-2{animation-delay:.28s}.delay-3{animation-delay:.44s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}

/* ---------- NAV ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease), border-color .4s var(--ease);
}
.nav.is-scrolled{
  background:rgba(7,7,9,.72);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-color:var(--line);
}
.nav__inner{
  max-width:var(--maxw);margin:0 auto;padding:0 40px;
  height:72px;display:flex;align-items:center;justify-content:space-between;
}
.nav__logo{
  font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px;
}
.nav__logo span{font-size:10px;color:var(--text-faint);letter-spacing:.18em;font-weight:500}
.nav__avatar{
  width:28px;height:28px;border-radius:50%;object-fit:cover;object-position:center top;
  border:1px solid rgba(216,182,120,.45);
}
.nav__links{display:flex;gap:34px}
.nav__links a{
  font-size:13.5px;color:var(--text-dim);padding:6px 0;position:relative;transition:color .3s;
}
.nav__links a:hover{color:var(--text)}
.nav__links a::after{
  content:'';position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--accent);
  transition:width .3s var(--ease);
}
.nav__links a:hover::after{width:100%}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav__toggle span{width:22px;height:1.5px;background:#fff;display:block}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;
  padding:120px 0 110px;overflow:hidden;
}
.hero__video-wrap{position:absolute;inset:0;z-index:0}
.hero__video{
  width:100%;height:100%;object-fit:cover;
  opacity:.62;filter:saturate(1.02) contrast(1.02) brightness(.92);
}
.hero__overlay{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(7,7,9,.55) 0%, rgba(7,7,9,.32) 35%, rgba(7,7,9,.82) 100%),
    linear-gradient(90deg, rgba(7,7,9,.72) 0%, rgba(7,7,9,.28) 55%, rgba(7,7,9,.5) 100%);
}
.hero__content{
  position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:0 40px;width:100%;
}
.hero__title{
  font-size:clamp(72px,12vw,148px);font-weight:800;letter-spacing:-.03em;line-height:.95;
  margin:10px 0 22px;
  background:linear-gradient(180deg,#fff 0%, #cfcfd4 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.eyebrow{
  font-size:12px;letter-spacing:.24em;color:var(--accent);text-transform:uppercase;font-weight:600;
}
.hero__sub{font-size:clamp(16px,2vw,22px);color:rgba(255,255,255,.88);font-weight:300;margin-bottom:22px;max-width:560px}
.hero__meta{display:flex;gap:12px;align-items:center;font-size:13.5px;color:rgba(255,255,255,.72);flex-wrap:wrap}
.hero__meta .dot{color:var(--accent)}
.scroll-cue{
  position:absolute;left:50%;bottom:28px;transform:translateX(-50%);z-index:3;
  width:26px;height:42px;border:1.5px solid rgba(255,255,255,.35);border-radius:14px;
}
.scroll-cue span{
  position:absolute;top:8px;left:50%;width:4px;height:4px;margin-left:-2px;
  background:var(--accent);border-radius:50%;animation:scrollCue 1.8s infinite;
}
@keyframes scrollCue{
  0%{opacity:1;transform:translateY(0)}
  70%{opacity:0;transform:translateY(16px)}
  100%{opacity:0}
}

/* ---------- ABOUT ---------- */
/* About — sticky scroll assembly (starts blank, builds as you scroll) */
.about-pin{position:relative;background:var(--bg)}
.about-pin__track{height:240vh;position:relative}
.about-pin__sticky{
  position:sticky;top:0;height:100vh;min-height:640px;
  display:flex;align-items:center;overflow:hidden;
}
.about__grid{
  display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:stretch;
  width:100%;
}
.assemble{
  opacity:0;
  will-change:transform, opacity, filter;
}
.about__portrait{
  display:flex;flex-direction:column;
  border-radius:28px;overflow:hidden;border:1px solid var(--line);
  background:#111;
  height:100%;
  align-self:stretch;
  /* start far left + down, assembled via JS */
  --ax:-120px; --ay:80px; --ascale:.86; --ablur:14px;
}
.about__portrait-frame{
  overflow:hidden;flex:1 1 auto;min-height:0;
}
.about__portrait img{
  width:100%;height:100%;
  object-fit:cover;object-position:center 14%;
  display:block;
}
.about__portrait-meta{padding:18px 22px;border-top:1px solid var(--line);flex-shrink:0}
.about__portrait-meta > p:first-child{font-weight:600;margin-bottom:8px}
.about__badge{
  display:inline-block;margin-bottom:10px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--accent);padding:6px 12px;border-radius:100px;
  border:1px solid rgba(216,182,120,.4);background:var(--accent-soft);
}
.about__portrait-meta p:last-child{font-size:13px;color:var(--text-faint);line-height:1.45}
.about__lead{
  display:flex;flex-direction:column;
  height:100%;
  min-height:100%;
  align-self:stretch;
}
.about__lead .section-tag{ --ax:40px; --ay:60px; --ascale:.95; --ablur:10px; }
.about__lead .section-title{ --ax:80px; --ay:100px; --ascale:.9; --ablur:12px; }
.about__text{
  font-size:18px;color:var(--text-dim);margin-bottom:32px;max-width:540px;
  --ax:60px; --ay:90px; --ascale:.94; --ablur:10px;
}
.about__text strong{color:var(--accent);font-weight:600}
.about__stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
  margin-bottom:28px;
}
.stat{
  min-height:96px;padding:18px 16px;
  border:1px solid var(--line);border-radius:16px;
  background:rgba(255,255,255,.02);
  display:flex;flex-direction:column;justify-content:center;
  --ax:0px; --ay:110px; --ascale:.88; --ablur:12px;
}
.stat__num{font-size:36px;font-weight:800;letter-spacing:-.02em;display:inline;line-height:1}
.stat__unit{font-size:20px;font-weight:700;color:var(--accent)}
.stat__label{font-size:12.5px;color:var(--text-faint);margin-top:10px;max-width:none;line-height:1.35}
.skills{
  margin-top:auto; /* pin to bottom — aligns with portrait card bottom */
  flex-shrink:0;
  background:linear-gradient(160deg,rgba(255,255,255,.04),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  --ax:0px; --ay:120px; --ascale:.92; --ablur:10px;
}
.skills__title{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-faint);margin-bottom:14px}
.skills__group{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  font-size:12.5px;padding:7px 14px;border-radius:100px;border:1px solid var(--line);color:var(--text-dim);
  transition:border-color .3s,color .3s;
}
.chip:hover{border-color:var(--accent);color:var(--text)}

/* ---------- TIMELINE ---------- */
.timeline{margin-top:56px;position:relative}
.timeline::before{
  content:'';position:absolute;left:170px;top:8px;bottom:8px;width:1px;background:var(--line);
}
.timeline__item{display:grid;grid-template-columns:170px 1fr;gap:48px;padding:32px 0}
.timeline__item:not(:last-child){border-bottom:1px solid var(--line)}
.timeline__date{font-size:13.5px;color:var(--text-faint);padding-top:4px;position:relative}
.timeline__date::before{
  content:'';position:absolute;right:-52px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(216,182,120,.18);
}
.timeline__body h3{font-size:24px;font-weight:700;margin-bottom:6px}
.timeline__org{font-size:14.5px;color:var(--accent);margin-bottom:16px}
.timeline__body ul{display:flex;flex-direction:column;gap:10px}
.timeline__body li{font-size:15px;color:var(--text-dim);padding-left:18px;position:relative}
.timeline__body li::before{content:'—';position:absolute;left:0;color:var(--text-faint)}
.timeline__body strong{color:var(--text);font-weight:600}

/* ---------- PRODUCT SHOWCASE (DJI-like) ---------- */
.projects{padding-bottom:40px}
.projects__head{margin-bottom:80px}

.showcase{margin-bottom:120px}
.showcase__sticky{
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
  min-height:78vh;padding:0 40px;max-width:var(--maxw);margin:0 auto 48px;
}
/* coverflow gallery — side peeks BEHIND center */
.coverflow{
  position:relative;height:min(58vh,460px);
  overflow:visible;
}
.coverflow__stage{
  position:relative;width:100%;height:100%;
  /* flat stacking so z-index reliably puts center on top */
}
.coverflow__card{
  position:absolute;top:50%;left:50%;
  width:58%;aspect-ratio:16/10;margin:0;padding:0;border:0;
  border-radius:18px;overflow:hidden;cursor:pointer;background:#111;
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 18px 40px rgba(0,0,0,.4);
  transform:translate(-50%,-50%) scale(.7);
  opacity:.3;filter:brightness(.5);
  transition:transform .7s var(--ease), opacity .7s var(--ease), filter .7s var(--ease), box-shadow .7s var(--ease), width .7s var(--ease);
  z-index:1;
}
.coverflow__card img{width:100%;height:100%;object-fit:cover;pointer-events:none}
.coverflow__card.is-left{
  z-index:1;opacity:.65;filter:brightness(.62);
  width:56%;
  transform:translate(calc(-50% - 38%), -50%) scale(.82) rotate(-3deg);
}
.coverflow__card.is-right{
  z-index:1;opacity:.65;filter:brightness(.62);
  width:56%;
  transform:translate(calc(-50% + 38%), -50%) scale(.82) rotate(3deg);
}
.coverflow__card.is-center{
  width:72%;opacity:1;filter:brightness(1);
  z-index:10;cursor:zoom-in;
  transform:translate(-50%,-50%) scale(1);
  box-shadow:0 36px 90px rgba(0,0,0,.6);
  border-color:rgba(216,182,120,.4);
}
.coverflow__hint{
  position:absolute;left:50%;bottom:-8px;transform:translateX(-50%);z-index:11;
  font-size:11px;letter-spacing:.08em;color:var(--text-faint);white-space:nowrap;
}

.cert-chip{
  display:flex;align-items:center;gap:14px;width:100%;max-width:380px;
  margin:0 0 22px;padding:12px 14px;border-radius:16px;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.03);text-align:left;color:inherit;
  transition:border-color .3s, background .3s, transform .3s;
}
.cert-chip:hover{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-2px)}
.cert-chip img{
  width:64px;height:48px;object-fit:cover;border-radius:8px;background:#fff;flex-shrink:0;
}
.cert-chip b{display:block;font-size:14px;font-weight:600;margin-bottom:2px}
.cert-chip small{font-size:12px;color:var(--text-faint)}

/* lightbox */
.lightbox{
  position:fixed;inset:0;z-index:10000;background:rgba(0,0,0,.88);
  display:flex;align-items:center;justify-content:center;padding:40px;
  backdrop-filter:blur(8px);
}
.lightbox[hidden]{display:none}
.lightbox img{
  max-width:min(1100px,92vw);max-height:88vh;object-fit:contain;
  border-radius:12px;box-shadow:0 30px 80px rgba(0,0,0,.55);
}
.lightbox__close{
  position:absolute;top:22px;right:28px;width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08);
  color:#fff;font-size:28px;line-height:1;cursor:pointer;
}
.showcase__copy{max-width:420px}
.showcase__index{font-size:13px;color:var(--text-faint);letter-spacing:.18em;margin-bottom:14px}
.showcase__copy h3{
  font-size:clamp(36px,4.5vw,52px);font-weight:800;letter-spacing:-.02em;margin-bottom:10px;
}
.showcase__role{font-size:14.5px;color:var(--accent);margin-bottom:18px}
.showcase__desc{font-size:15.5px;color:var(--text-dim);margin-bottom:22px}
.showcase__desc strong{color:var(--text)}
.showcase__tags{display:flex;gap:10px;flex-wrap:wrap}
.showcase__tags span{
  font-size:12px;padding:7px 14px;border-radius:100px;border:1px solid var(--line);color:var(--text-dim);
}
.showcase__metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:22px;
}
.showcase__metrics div{
  padding:14px 0;border-top:1px solid var(--line);
}
.showcase__metrics b{
  display:block;font-size:28px;font-weight:800;letter-spacing:-.02em;line-height:1.1;margin-bottom:4px;
}
.showcase__metrics span{font-size:12px;color:var(--text-faint)}

.showcase__gallery{
  max-width:var(--maxw);margin:0 auto;padding:0 40px;
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.showcase__gallery figure{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;
}
.showcase__gallery img{width:100%;height:100%;object-fit:cover}

/* phone stage */
.phone-stage{
  position:relative;height:min(72vh,620px);display:flex;align-items:center;justify-content:center;
  perspective:1200px;
}
.phone{
  width:clamp(160px,18vw,210px);
  transition:transform 1.1s var(--ease);
}
.phone__bezel{
  border-radius:28px;padding:10px;background:linear-gradient(160deg,#2a2a30,#121214);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 30px 70px rgba(0,0,0,.55);
}
.phone__bezel img{
  width:100%;aspect-ratio:9/19.5;object-fit:cover;object-position:top center;
  border-radius:20px;background:#fff;
}
.phone--main{z-index:3;width:clamp(180px,20vw,240px)}
.phone--tilt-l{transform:translateX(18%) rotateY(18deg) scale(.9);z-index:1;opacity:.88}
.phone--tilt-r{transform:translateX(-18%) rotateY(-18deg) scale(.9);z-index:1;opacity:.88}
.phone-stage.is-visible .phone--tilt-l{transform:translateX(8%) rotateY(12deg) scale(.92)}
.phone-stage.is-visible .phone--tilt-r{transform:translateX(-8%) rotateY(-12deg) scale(.92)}
.phone-stage.is-visible .phone--main{transform:translateY(-8px)}

/* chuyi stage */
.chuyi-stage{
  position:relative;min-height:min(70vh,580px);
  display:flex;align-items:center;justify-content:center;gap:28px;
}
.chuyi-stage .phone{width:clamp(170px,19vw,220px);z-index:2}
.chuyi-stage__web{
  width:min(52%,420px);border-radius:18px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 30px 80px rgba(0,0,0,.45);
  transform:translateY(18px);
  transition:transform 1.1s var(--ease);
}
.chuyi-stage__web img{width:100%;aspect-ratio:4/3;object-fit:cover;object-position:top}
.chuyi-stage.is-visible .chuyi-stage__web{transform:translateY(0)}

/* ---------- FILM PANELS (each has own video) ---------- */
.film{background:#000;padding-bottom:40px}
.film__intro{
  max-width:var(--maxw);margin:0 auto;padding:120px 40px 40px;color:#fff;
}
.film-panel{
  position:relative;height:100vh;min-height:640px;overflow:hidden;
  display:flex;align-items:flex-end;
}
.film-panel__media{
  position:absolute;inset:0;z-index:0;
}
.film-panel__media video{
  width:100%;height:100%;object-fit:cover;
  opacity:.35;transform:scale(1.04);
  filter:brightness(1.05) contrast(1.05);
  transition:opacity 1s var(--ease), transform 1.4s var(--ease);
}
.film-panel.is-active .film-panel__media video{
  opacity:1;transform:scale(1);
}
.film-panel__veil{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg, rgba(0,0,0,.28) 0%, rgba(0,0,0,.12) 40%, rgba(0,0,0,.7) 100%);
  opacity:1;transition:opacity 1.1s var(--ease);
}
/* when user settles on a panel, clear the dark veil so video reads brightly */
.film-panel.is-settled .film-panel__veil{opacity:.18}
.film-panel.is-settled .film-panel__caption{
  text-shadow:0 8px 30px rgba(0,0,0,.65);
}
.film-panel__caption{
  position:relative;z-index:2;padding:0 40px 12vh;
  max-width:var(--maxw);margin:0 auto;width:100%;color:#fff;
  opacity:0;transform:translateY(40px);
  transition:opacity .9s var(--ease), transform .9s var(--ease);
}
.film-panel.is-active .film-panel__caption{opacity:1;transform:translateY(0)}
.film__cap-index{
  font-size:12px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase;
  font-weight:600;margin-bottom:14px;
}
.film-panel__caption h3{
  font-size:clamp(32px,4.5vw,48px);font-weight:700;margin-bottom:12px;letter-spacing:-.01em;
}
.film-panel__caption p{font-size:16px;color:rgba(255,255,255,.7)}

/* ---------- GALLERY ---------- */
.gallery .container{margin-bottom:48px}
.gallery__grid{
  max-width:var(--maxw);margin:0 auto;padding:0 40px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;grid-auto-rows:250px;
}
.gallery__item{border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.gallery__item img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.gallery__item:hover img{transform:scale(1.05)}
.gallery__item.span-2{grid-column:span 2}

/* ---------- REEL ---------- */
.reel{
  padding:150px 0 170px;
  background:radial-gradient(ellipse 90% 70% at 50% 0%, #16151a 0%, #060607 65%);
}
.reel__inner{max-width:var(--maxw);margin:0 auto;padding:0 40px;text-align:center}
.reel .section-tag,.reel .section-title,.reel .section-desc{margin-left:auto;margin-right:auto}
.reel .section-desc{margin-bottom:48px}
.reel__player{
  position:relative;max-width:980px;margin:0 auto;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 40px 100px -20px rgba(0,0,0,.7);
  aspect-ratio:16/9;background:#000;
}
.reel__player video{width:100%;height:100%;object-fit:cover}
.reel__play{
  position:absolute;inset:0;margin:auto;width:84px;height:84px;border-radius:50%;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.4);
  backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:transform .3s var(--ease), background .3s;
}
.reel__play:hover{transform:scale(1.08);background:rgba(255,255,255,.22)}
.reel__play svg{width:30px;height:30px;fill:#fff}
.reel__player.is-playing .reel__play{opacity:0;pointer-events:none}

/* ---------- FOOTER ---------- */
.footer{padding:140px 0 0;border-top:1px solid var(--line)}
.footer__grid{display:grid;grid-template-columns:1.2fr 1fr;gap:60px;padding-bottom:80px}
.footer__desc{color:var(--text-dim);font-size:15.5px;margin-top:8px}
.footer__contacts{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-content:start}
.footer__contacts a,.footer__contact-static{
  display:flex;flex-direction:column;gap:6px;font-size:16px;font-weight:500;
  padding-bottom:16px;border-bottom:1px solid var(--line);transition:color .3s;
}
.footer__contacts a:hover{color:var(--accent)}
.footer__contacts span,.footer__contact-static span{
  font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);font-weight:600;
}
.footer__bottom{
  border-top:1px solid var(--line);padding:26px 40px;display:flex;justify-content:space-between;
  font-size:12.5px;color:var(--text-faint);max-width:var(--maxw);margin:0 auto;
}
.footer__top:hover{color:var(--accent)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:980px){
  .about-pin__track{height:200vh}
  .about-pin__sticky{min-height:100vh;align-items:flex-start;padding:100px 0 40px}
  .about__grid{grid-template-columns:1fr;gap:40px}
  .about__portrait{max-width:360px;height:auto; --ax:0px; --ay:100px; }
  .about__portrait-frame{min-height:280px}
  .about__portrait img{min-height:280px}
  .about__stats{grid-template-columns:repeat(3,1fr);gap:12px}
  .coverflow{height:340px}
  .coverflow__card.is-left{transform:translate(calc(-50% - 30%), -50%) scale(.78) rotate(-2deg)}
  .coverflow__card.is-right{transform:translate(calc(-50% + 30%), -50%) scale(.78) rotate(2deg)}
  .coverflow__card.is-center{width:78%}
  .showcase__sticky{grid-template-columns:1fr;gap:36px;min-height:auto;padding-bottom:20px}
  .showcase__copy{max-width:none;order:-1}
  .timeline::before{left:8px}
  .timeline__item{grid-template-columns:1fr;gap:12px}
  .timeline__date::before{left:-2px;right:auto}
  .gallery__grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:200px}
  .footer__grid{grid-template-columns:1fr}
  .phone-stage{height:420px}
  .chuyi-stage{flex-direction:column}
  .chuyi-stage__web{width:86%}
}
@media (max-width:680px){
  .container,.nav__inner,.showcase__sticky,.film__intro,.film-panel__caption{padding-left:22px;padding-right:22px}
  .nav__links{
    position:fixed;top:72px;left:0;right:0;background:rgba(7,7,9,.97);
    flex-direction:column;gap:0;padding:8px 22px 20px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .3s,transform .3s;border-bottom:1px solid var(--line);
  }
  .nav.is-open .nav__links{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav__links a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav__toggle{display:flex}
  .section{padding:90px 0}
  .phone--tilt-l,.phone--tilt-r{display:none}
  .showcase__gallery{grid-template-columns:1fr}
  .gallery__grid{grid-auto-rows:160px}
  .footer__contacts{grid-template-columns:1fr}
  .footer__bottom{padding:22px;flex-direction:column;gap:10px}
}