/* ===================================================================
   BRAIN LAB — 脑浆研究所
   Style: kawaii pink-brain IP · thick outlines · sunburst · pixel pop
=================================================================== */

:root{
  --pink:#f6a9c7;
  --pink-deep:#ef6fa6;
  --pink-hot:#ff5fa2;
  --sky:#4ec8f5;
  --sky-deep:#2bb0e6;
  --purple:#a98ce6;
  --lime:#7ed957;
  --yellow:#ffd83d;
  --orange:#ff9f1c;
  --ink:#3a2b44;
  --cream:#fff6ec;
  --paper:#fffaf3;

  --shadow:6px 6px 0 var(--ink);
  --shadow-sm:4px 4px 0 var(--ink);
  --radius:26px;

  --font-cn:"Noto Sans SC",system-ui,sans-serif;
  --font-round:"Fredoka","Baloo 2",var(--font-cn);
  --font-pix:"Press Start 2P",var(--font-round);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-round);
  color:var(--ink);
  background:var(--cream);
  overflow-x:hidden;
  line-height:1.6;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
em{font-style:normal}

/* dotted bg texture */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(circle, rgba(58,43,68,.05) 1.5px, transparent 1.6px) 0 0/22px 22px,
    var(--cream);
}

/* ---------- NAV ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px clamp(16px,4vw,46px);
  background:rgba(255,246,236,.82);
  backdrop-filter:blur(10px);
  border-bottom:3px solid var(--ink);
  transition:transform .35s ease;
}
.nav.hide{transform:translateY(-110%)}
.nav__brand{display:flex;align-items:center;gap:10px}
.nav__logo{font-size:1.7rem;animation:bob 3s ease-in-out infinite}
.nav__name{font-family:var(--font-pix);font-size:.95rem;letter-spacing:1px}
.nav__name em{color:var(--pink-hot)}
.nav__links{display:flex;align-items:center;gap:clamp(10px,2vw,28px)}
.nav__links a{font-weight:600;font-size:1rem;position:relative;padding:4px 2px}
.nav__links a:not(.nav__cta)::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:3px;
  background:var(--pink-hot);border-radius:3px;transition:width .25s;
}
.nav__links a:not(.nav__cta):hover::after{width:100%}
.nav__cta{
  background:var(--pink-hot);color:#fff;border:3px solid var(--ink);
  padding:8px 18px;border-radius:999px;box-shadow:var(--shadow-sm);
  transition:transform .15s,box-shadow .15s;
}
.nav__cta:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav__burger span{width:26px;height:3px;background:var(--ink);border-radius:3px;transition:.3s}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  padding:120px clamp(16px,5vw,70px) 60px;
  overflow:hidden;
}
.sunburst{
  position:absolute;z-index:-1;
  /* big centered square so rotation never exposes blank corners */
  top:50%;left:50%;width:250vmax;height:250vmax;
  margin-top:-125vmax;margin-left:-125vmax;
  background:repeating-conic-gradient(from 0deg at 50% 50%,
     #bdecff 0deg 12deg, #d8f5ff 12deg 24deg);
  animation:spin 90s linear infinite;
  opacity:.9;
}
.hero::after{ /* fade bottom into page */
  content:"";position:absolute;left:0;right:0;bottom:0;height:160px;
  background:linear-gradient(transparent,var(--cream));z-index:-1;
}
.hero__clouds .cloud{
  position:absolute;background:#fff;border:3px solid var(--ink);border-radius:50px;
  box-shadow:var(--shadow-sm);
}
.cloud::before,.cloud::after{content:"";position:absolute;background:#fff;border:3px solid var(--ink);border-radius:50%}
.cloud--1{width:120px;height:46px;top:16%;left:8%;animation:float 7s ease-in-out infinite}
.cloud--1::before{width:50px;height:50px;top:-26px;left:18px}
.cloud--1::after{width:38px;height:38px;top:-18px;left:60px}
.cloud--2{width:90px;height:38px;top:26%;right:12%;animation:float 9s ease-in-out infinite reverse}
.cloud--2::before{width:42px;height:42px;top:-22px;left:14px}
.cloud--2::after{width:30px;height:30px;top:-12px;left:48px}
.cloud--3{width:70px;height:30px;bottom:24%;left:16%;animation:float 8s ease-in-out infinite}
.cloud--3::before{width:34px;height:34px;top:-18px;left:10px}
.cloud--3::after{width:24px;height:24px;top:-10px;left:38px}

.hero__inner{
  position:relative;z-index:2;
  max-width:1180px;margin:0 auto;width:100%;
  display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center;
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:3px solid var(--ink);border-radius:999px;
  padding:6px 16px;font-weight:700;box-shadow:var(--shadow-sm);margin-bottom:20px;
}
.blink{color:var(--lime);animation:blink 1.4s steps(1) infinite}
.hero__title{display:flex;flex-direction:column;line-height:1;margin-bottom:22px}
.pix{
  font-family:var(--font-pix);font-size:clamp(2.6rem,8vw,5.6rem);
  color:#fff;letter-spacing:2px;
  -webkit-text-stroke:4px var(--ink);
  text-shadow:8px 8px 0 var(--ink);
  paint-order:stroke fill;
}
.pix--pink{color:var(--pink-hot)}
.hero__tag{font-family:var(--font-round);font-weight:700;font-size:clamp(1.5rem,3.4vw,2.3rem);margin-bottom:14px;line-height:1.25}
.hero__sub{font-size:1.1rem;max-width:430px;margin-bottom:28px;color:#5a4a63}
.hero__btns{display:flex;flex-wrap:wrap;gap:14px}

.btn{
  display:inline-block;font-family:var(--font-round);font-weight:700;font-size:1.05rem;
  padding:13px 26px;border-radius:999px;border:3px solid var(--ink);cursor:pointer;
  box-shadow:var(--shadow-sm);transition:transform .15s,box-shadow .15s;
}
.btn:hover{transform:translate(-3px,-3px);box-shadow:7px 7px 0 var(--ink)}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--ink)}
.btn--primary{background:var(--pink-hot);color:#fff}
.btn--ghost{background:#fff;color:var(--ink)}
.btn--lg{font-size:1.2rem;padding:16px 34px}

/* mascot */
.hero__mascot{position:relative;display:flex;justify-content:center;align-items:center}
.mascot{width:min(420px,80vw);overflow:visible;animation:bob 4s ease-in-out infinite;filter:drop-shadow(8px 12px 0 rgba(58,43,68,.18))}
.mascot__arms{animation:wave 3s ease-in-out infinite;transform-origin:120px 120px}
.mascot-glow{
  position:absolute;width:70%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(255,95,162,.45),transparent 70%);
  filter:blur(8px);animation:pulse 4s ease-in-out infinite;
}
.sparkle{position:absolute;color:var(--yellow);font-size:2rem;text-shadow:2px 2px 0 var(--ink);animation:twinkle 2.2s ease-in-out infinite}
.s1{top:6%;left:14%}
.s2{top:18%;right:10%;animation-delay:.6s;font-size:1.5rem}
.s3{bottom:16%;left:8%;animation-delay:1.1s;font-size:2.4rem}
.badge-pop{
  position:absolute;bottom:8%;right:4%;
  background:var(--yellow);border:3px solid var(--ink);border-radius:14px;
  padding:8px 14px;font-weight:800;font-family:var(--font-round);
  box-shadow:var(--shadow-sm);transform:rotate(-8deg);animation:pop 3s ease-in-out infinite;
}

/* marquee */
.marquee{
  position:relative;z-index:3;margin-top:30px;
  background:var(--ink);color:#fff;border-top:3px solid var(--ink);border-bottom:3px solid var(--ink);
  transform:rotate(-1.4deg) scale(1.04);overflow:hidden;padding:12px 0;
}
.marquee__track{display:flex;white-space:nowrap;animation:scroll 26s linear infinite;font-weight:700;font-size:1.05rem;letter-spacing:.5px}

/* ---------- SECTIONS ---------- */
.section{padding:clamp(60px,9vw,120px) clamp(16px,5vw,70px);position:relative}
.section__head{max-width:780px;margin:0 auto clamp(36px,5vw,60px);text-align:center}
.kicker{
  display:inline-block;font-family:var(--font-pix);font-size:.62rem;letter-spacing:1px;
  background:var(--ink);color:#fff;padding:7px 12px;border-radius:8px;margin-bottom:18px;
}
.kicker--light{background:#fff;color:var(--ink)}
.section__title{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;line-height:1.1}
.hl{color:var(--pink-hot)}
.section__desc{margin-top:14px;font-size:1.12rem;color:#5a4a63}

/* ---------- ABOUT ---------- */
.about__grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(24px,5vw,60px);align-items:center}
.about__photos{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.photo{border:4px solid var(--ink);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#fff}
.photo img{width:100%;height:100%;object-fit:cover;aspect-ratio:3/4}
.photo figcaption{padding:10px 12px;font-weight:600;font-size:.92rem;text-align:center;border-top:3px solid var(--ink);background:var(--pink)}
.photo--avatar{transform:rotate(-3deg)}
.photo--street{transform:rotate(3deg);margin-top:22px}
.photo--street figcaption{background:var(--sky)}
.about__text .lead{font-size:1.35rem;font-weight:700;margin-bottom:16px}
.about__text p{margin-bottom:14px;font-size:1.06rem;color:#4a3c52}
.about__text strong{color:var(--pink-deep)}
.about__text em{background:linear-gradient(transparent 60%,var(--yellow) 60%);font-weight:700}
.about__chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.about__chips li{background:#fff;border:3px solid var(--ink);border-radius:999px;padding:8px 16px;font-weight:600;box-shadow:var(--shadow-sm)}

/* ---------- MASCOT TRAITS ---------- */
.mascot-sec{background:
  linear-gradient(180deg,transparent,rgba(168,140,230,.10),transparent);}
.traits{max-width:1140px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.trait{
  background:#fff;border:4px solid var(--ink);border-radius:var(--radius);
  padding:26px 22px;text-align:center;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden;
}
.trait::before{content:"";position:absolute;inset:0 0 auto 0;height:10px;background:var(--c)}
.trait:hover{transform:translateY(-8px) rotate(-1.5deg);box-shadow:8px 12px 0 var(--ink)}
.trait__face{
  width:74px;height:74px;display:grid;place-items:center;margin:6px auto 16px;
  background:var(--c);border:3px solid var(--ink);border-radius:50%;font-size:2.1rem;
}
.trait h3{font-size:1.25rem;margin-bottom:8px}
.trait p{font-size:.98rem;color:#5a4a63}

/* ---------- GALLERY ---------- */
.gallery{max-width:1200px;margin:0 auto;columns:3;column-gap:20px}
.card{
  break-inside:avoid;margin-bottom:20px;border:4px solid var(--ink);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);cursor:pointer;position:relative;background:#fff;
  transition:transform .2s,box-shadow .2s;
}
.card img{width:100%}
.card::after{
  content:"🔍 放大";position:absolute;inset:auto 0 0 0;
  background:linear-gradient(transparent,rgba(58,43,68,.85));color:#fff;
  padding:30px 16px 14px;font-weight:700;opacity:0;transform:translateY(12px);transition:.25s;
}
.card:hover{transform:translateY(-6px) rotate(-1deg);box-shadow:8px 12px 0 var(--ink)}
.card:hover::after{opacity:1;transform:translateY(0)}
.card:nth-child(3n+2){transform:rotate(.6deg)}
.card:nth-child(3n+2):hover{transform:translateY(-6px) rotate(1deg)}

/* ---------- SERIES ---------- */
.series{position:relative;color:#fff;text-align:center;overflow:hidden;border-top:4px solid var(--ink);border-bottom:4px solid var(--ink)}
.series__bg{
  position:absolute;z-index:-1;
  /* big centered square so rotation never exposes blank corners */
  top:50%;left:50%;width:200vmax;height:200vmax;
  margin-top:-100vmax;margin-left:-100vmax;
  background:
    repeating-conic-gradient(from 0deg at 50% 50%,
      #ff6fae 0deg 14deg, #ff8fc0 14deg 28deg);
  animation:spin 70s linear infinite reverse;
}
.series::before{content:"";position:absolute;inset:0;z-index:-1;background:rgba(58,43,68,.12)}
.series__inner{max-width:840px;margin:0 auto}
.series__title{font-family:var(--font-round);font-weight:800;font-size:clamp(2.2rem,6vw,4rem);line-height:1.05;
  text-shadow:5px 5px 0 var(--ink);margin-bottom:20px}
.series__desc{font-size:1.15rem;max-width:600px;margin:0 auto 34px;font-weight:500;text-shadow:1px 1px 0 rgba(58,43,68,.4)}
.series__stats{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:38px}
.stat{background:#fff;color:var(--ink);border:3px solid var(--ink);border-radius:18px;padding:16px 22px;min-width:130px;box-shadow:var(--shadow-sm)}
.stat b{display:block;font-family:var(--font-pix);font-size:1.4rem;color:var(--pink-hot)}
.stat span{font-weight:600;font-size:.92rem}

/* ---------- CONTACT ---------- */
.contact{padding-bottom:0}
.contact__card{
  max-width:1000px;margin:0 auto;background:var(--paper);
  border:4px solid var(--ink);border-radius:34px;box-shadow:var(--shadow);
  display:grid;grid-template-columns:.7fr 1.3fr;gap:20px;align-items:center;
  padding:clamp(24px,4vw,46px);overflow:hidden;
}
.contact__left{display:grid;place-items:center}
.mascot--sm{width:min(220px,60vw);animation:bob 4s ease-in-out infinite}
.contact__right p{font-size:1.1rem;color:#5a4a63;margin:10px 0 22px}
.contact__links{display:flex;flex-direction:column;gap:14px}
.clink{
  display:inline-flex;align-items:center;gap:6px;background:#fff;border:3px solid var(--ink);
  border-radius:14px;padding:14px 20px;font-weight:600;font-size:1.05rem;box-shadow:var(--shadow-sm);
  transition:transform .15s,box-shadow .15s;
}
.clink:hover{transform:translate(-3px,-3px);box-shadow:7px 7px 0 var(--ink)}
.clink--red{background:#ff4d6d;color:#fff}
.clink b{font-weight:800}

.footer{text-align:center;padding:46px 16px 30px;color:#6a5b72}
.footer p{font-size:.95rem}
.footer__small{margin-top:6px;font-size:.85rem;opacity:.8}

/* ---------- INTRO / GIFT MODAL ---------- */
.intro{
  position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;
  padding:24px;background:rgba(58,43,68,.55);backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s;
}
.intro.show{opacity:1;visibility:visible}
.intro__card{
  position:relative;width:min(460px,92vw);background:var(--paper);
  border:4px solid var(--ink);border-radius:30px;box-shadow:10px 10px 0 var(--ink);
  padding:36px 28px 30px;text-align:center;
  transform:translateY(28px) scale(.95);transition:transform .45s cubic-bezier(.2,.9,.3,1.3);
}
.intro.show .intro__card{transform:none}
.intro__card::before{ /* dotted texture inside card */
  content:"";position:absolute;inset:0;border-radius:26px;z-index:0;pointer-events:none;
  background:radial-gradient(circle,rgba(58,43,68,.05) 1.3px,transparent 1.4px) 0 0/18px 18px;
}
.intro__card>*{position:relative;z-index:1}
.intro__badge{
  position:absolute;top:-15px;left:50%;transform:translateX(-50%) rotate(-3deg);z-index:2;
  background:var(--yellow);border:3px solid var(--ink);border-radius:10px;
  font-family:var(--font-pix);font-size:.6rem;padding:7px 13px;box-shadow:3px 3px 0 var(--ink);
}
.intro__close{
  position:absolute;top:14px;right:14px;z-index:2;width:36px;height:36px;border-radius:50%;
  border:3px solid var(--ink);background:#fff;font-weight:800;cursor:pointer;box-shadow:var(--shadow-sm);
  transition:transform .15s;
}
.intro__close:hover{transform:scale(1.12) rotate(90deg)}
.intro__mascot{position:relative;width:128px;margin:4px auto 8px}
.intro__mascot .mascot{width:128px;animation:bob 4s ease-in-out infinite;filter:drop-shadow(5px 7px 0 rgba(58,43,68,.15))}
.intro__gift{position:absolute;bottom:-2px;right:2px;font-size:1.9rem;animation:pop 2.4s ease-in-out infinite}
.intro__title{font-size:1.7rem;font-weight:800;margin-bottom:14px}
.intro__text{font-size:1.02rem;color:#4a3c52;margin-bottom:12px;line-height:1.65}
.intro__text strong{color:var(--pink-deep)}
.intro__text b{background:linear-gradient(transparent 60%,var(--yellow) 60%);font-weight:800;font-style:normal}
.intro__sign{font-weight:700;color:var(--ink);margin:16px 0 20px;font-size:1rem}
.intro__enter{font-size:1.1rem}

/* ---------- LIGHTBOX ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;display:none;
  background:rgba(58,43,68,.92);
  align-items:center;justify-content:center;padding:30px;
}
.lightbox.open{display:flex;animation:fade .25s ease}
.lightbox__figure{max-width:90vw;max-height:88vh;text-align:center}
.lightbox__figure img{max-width:90vw;max-height:78vh;border:4px solid #fff;border-radius:18px;box-shadow:0 0 0 4px var(--ink)}
.lightbox__figure figcaption{color:#fff;font-weight:700;margin-top:16px;font-size:1.15rem}
.lightbox button{
  position:absolute;background:#fff;border:3px solid var(--ink);border-radius:50%;
  width:54px;height:54px;font-size:1.6rem;font-weight:800;cursor:pointer;
  box-shadow:var(--shadow-sm);transition:transform .15s;
}
.lightbox button:hover{transform:scale(1.1)}
.lightbox__close{top:24px;right:24px}
.lightbox__nav{top:50%;transform:translateY(-50%)}
.lightbox__prev{left:24px}
.lightbox__next{right:24px}
.lightbox__nav:hover{transform:translateY(-50%) scale(1.1)}

/* ---------- REVEAL ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- ANIMATIONS ---------- */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
@keyframes wave{0%,100%{transform:rotate(0)}50%{transform:rotate(4deg)}}
@keyframes pulse{0%,100%{transform:scale(.9);opacity:.7}50%{transform:scale(1.05);opacity:1}}
@keyframes twinkle{0%,100%{transform:scale(.6);opacity:.4}50%{transform:scale(1.1);opacity:1}}
@keyframes pop{0%,100%{transform:rotate(-8deg) scale(1)}50%{transform:rotate(-8deg) scale(1.12)}}
@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:.2}}
@keyframes scroll{to{transform:translateX(-50%)}}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* ---------- RESPONSIVE ---------- */
@media(max-width:980px){
  .hero__inner{grid-template-columns:1fr;text-align:center}
  .hero__copy{order:2}
  .hero__mascot{order:1}
  .hero__eyebrow,.hero__btns{justify-content:center}
  .hero__btns{justify-content:center}
  .hero__sub{margin-inline:auto}
  .about__grid{grid-template-columns:1fr}
  .traits{grid-template-columns:1fr 1fr}
  .gallery{columns:2}
  .contact__card{grid-template-columns:1fr;text-align:center}
  .contact__links{align-items:center}
}
@media(max-width:640px){
  .nav__links{position:fixed;inset:64px 0 auto 0;flex-direction:column;background:var(--cream);
    border-bottom:3px solid var(--ink);padding:20px;gap:18px;transform:translateY(-130%);transition:transform .35s}
  .nav__links.open{transform:none}
  .nav__burger{display:flex}
  .traits{grid-template-columns:1fr}
  .gallery{columns:1}
  .pix{text-shadow:5px 5px 0 var(--ink)}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}