@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;900&family=Playfair+Display:ital,wght@1,700&display=swap');

:root{
  --pink:#f72d7d;
  --pink-dark:#d91865;
  --purple:#6f3ce9;
  --gold:#ffbd32;
  --ink:#56213c;
  --paper:#fffafd;
  --shadow:0 24px 70px rgba(128,20,76,.18);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-width:320px;
  overflow-x:hidden;
  color:var(--ink);
  font-family:"Noto Sans TC",system-ui,sans-serif;
  background:
    radial-gradient(circle at 10% 20%,rgba(255,172,211,.38),transparent 28%),
    radial-gradient(circle at 90% 60%,rgba(178,143,255,.25),transparent 30%),
    linear-gradient(180deg,#fff7fb 0%,#fff 45%,#fff4fa 100%);
}
a{color:inherit}
.hero{
  position:relative;
  width:100%;
  min-height:min(100vh,900px);
  display:grid;
  place-items:center;
  overflow:hidden;
  background:#ffd8e7;
}
.hero__image{
  width:100%;
  height:100%;
  min-height:min(100vh,900px);
  object-fit:cover;
  object-position:center;
  display:block;
  transform:scale(1.015);
  animation:heroBreath 8s ease-in-out infinite alternate;
}
@keyframes heroBreath{to{transform:scale(1.055)}}
.hero__shine{
  position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 20%,rgba(255,255,255,.42) 42%,transparent 58%);
  transform:translateX(-120%);
  animation:shine 5.5s ease-in-out infinite;
  pointer-events:none;
}
@keyframes shine{0%,35%{transform:translateX(-120%)}70%,100%{transform:translateX(120%)}}
.hero__scroll{
  position:absolute;
  left:50%;bottom:20px;
  translate:-50% 0;
  display:grid;gap:7px;place-items:center;
  color:white;text-decoration:none;font-weight:700;font-size:.86rem;
  text-shadow:0 2px 10px rgba(90,0,45,.55);
}
.hero__scroll i{width:24px;height:38px;border:2px solid rgba(255,255,255,.85);border-radius:99px;position:relative}
.hero__scroll i::after{content:"";position:absolute;width:5px;height:9px;border-radius:9px;background:#fff;left:50%;top:7px;translate:-50% 0;animation:scrollDot 1.5s infinite}
@keyframes scrollDot{to{transform:translateY(13px);opacity:0}}
.particle-layer{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:20}
.falling{
  position:absolute;top:-10vh;
  animation:fall linear infinite;
  filter:drop-shadow(0 4px 5px rgba(120,20,80,.15));
  will-change:transform;
}
@keyframes fall{to{transform:translate3d(var(--drift),115vh,0) rotate(var(--spin))}}
.main{position:relative}
.birthday-section{
  position:relative;
  min-height:900px;
  display:grid;
  place-items:center;
  padding:110px 22px;
  overflow:hidden;
}
.ambient{position:absolute;border-radius:50%;filter:blur(2px);will-change:transform}
.ambient--one{width:330px;height:330px;left:-100px;top:80px;background:radial-gradient(circle at 30% 30%,#fff,rgba(255,91,162,.35) 38%,transparent 70%)}
.ambient--two{width:400px;height:400px;right:-130px;bottom:50px;background:radial-gradient(circle at 35% 35%,#fff,rgba(121,74,241,.25) 42%,transparent 72%)}
.birthday-card{
  position:relative;
  width:min(820px,100%);
  padding:78px clamp(24px,6vw,80px) 58px;
  border:1px solid rgba(255,255,255,.88);
  border-radius:36px;
  background:linear-gradient(145deg,rgba(255,255,255,.94),rgba(255,244,250,.82));
  box-shadow:var(--shadow);
  backdrop-filter:blur(20px);
  text-align:center;
  opacity:0;transform:translateY(42px) scale(.96);
  transition:opacity .9s ease,transform .9s cubic-bezier(.2,.8,.2,1);
}
.birthday-card.is-visible{opacity:1;transform:none}
.birthday-card::before{
  content:"";position:absolute;inset:12px;border:1px dashed rgba(247,45,125,.22);border-radius:27px;pointer-events:none
}
.card-ribbon{
  position:absolute;top:-24px;left:50%;translate:-50% 0;
  min-width:230px;padding:12px 30px;border-radius:999px;
  color:#fff;background:linear-gradient(135deg,var(--pink),#ff6aa6 55%,var(--purple));
  font-family:"Playfair Display",serif;font-size:1.3rem;
  box-shadow:0 12px 25px rgba(232,31,115,.28);
}
.cake-icon{font-size:3rem;animation:bob 2.8s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-8px) rotate(-3deg)}}
.eyebrow{margin:15px 0 5px;color:var(--purple);font-weight:900;letter-spacing:.18em}
h1{margin:0 0 32px;font-size:clamp(2.2rem,6vw,4rem);line-height:1;background:linear-gradient(90deg,var(--pink-dark),var(--purple));-webkit-background-clip:text;color:transparent}
.blessing{text-align:left;font-size:clamp(1rem,2vw,1.13rem);line-height:2.05;letter-spacing:.035em}
.blessing strong{color:var(--pink-dark)}
.cta{
  position:relative;overflow:hidden;
  margin:36px auto 23px;
  width:min(580px,100%);
  display:flex;align-items:center;gap:16px;
  padding:18px 22px;border-radius:20px;
  color:#fff;text-decoration:none;text-align:left;
  background:linear-gradient(100deg,var(--pink-dark),var(--pink) 42%,var(--purple));
  box-shadow:0 15px 35px rgba(222,27,110,.32),inset 0 1px rgba(255,255,255,.35);
  transition:.25s ease;
}
.cta:hover{transform:translateY(-4px) scale(1.015);box-shadow:0 22px 50px rgba(222,27,110,.42),0 0 30px rgba(255,95,164,.35)}
.cta__gift{font-size:2.2rem;animation:giftShake 2.2s infinite}
@keyframes giftShake{0%,80%,100%{transform:none}85%{transform:rotate(-10deg)}90%{transform:rotate(10deg)}95%{transform:rotate(-6deg)}}
.cta strong{display:block;font-size:clamp(1.02rem,3vw,1.35rem)}
.cta small{display:block;margin-top:3px;opacity:.88}
.cta b{margin-left:auto;font-size:1.6rem}
.ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.5);transform:scale(0);animation:ripple .65s linear;pointer-events:none}
@keyframes ripple{to{transform:scale(4);opacity:0}}
.closing{line-height:1.8}
.signature{margin-top:28px;color:#9e557a;font-weight:700}
.footer{
  position:relative;min-height:360px;display:grid;place-items:center;overflow:hidden;
  color:#fff;background:linear-gradient(180deg,#5f2bc2,#2e175f);
}
#fireworksCanvas{position:absolute;inset:0;width:100%;height:100%}
.stars{position:absolute;inset:0;background-image:radial-gradient(#fff 1px,transparent 1px);background-size:34px 34px;opacity:.35;animation:twinkle 2.5s ease-in-out infinite alternate}
@keyframes twinkle{to{opacity:.7}}
.footer__content{position:relative;z-index:2;display:grid;gap:12px;text-align:center;padding:40px}
.footer__content strong{font-family:"Playfair Display",serif;font-size:clamp(2.4rem,7vw,5rem)}
.footer__content a{justify-self:center;padding:11px 18px;border:1px solid rgba(255,255,255,.45);border-radius:99px;text-decoration:none;background:rgba(255,255,255,.1)}
@media (max-width:720px){
  .hero{min-height:auto}
  .hero__image{min-height:auto;height:auto;object-fit:contain}
  .hero__scroll{display:none}
  .birthday-section{padding:90px 14px;min-height:auto}
  .birthday-card{padding:68px 20px 42px;border-radius:27px}
  .blessing{line-height:1.9}
  .cta{padding:15px;gap:11px}
  .cta__gift{font-size:1.75rem}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}
}