:root{
  --navy:#0B2257; --deep:#050F33;
  --sea:#1C8FB8; --red:#DE2910; --rose:#FF5A5F; --gold:#FFD166; --amber:#FFB23F;
  --ink:#0E1B3A; --paper:#F7F5F0; --paper-dim:rgba(247,245,240,.74);
  --sans:"Noto Sans TC","PingFang TC","PingFang HK","Microsoft JhengHei",system-ui,sans-serif;
  --serif:"Noto Serif TC","Songti TC","PMingLiU",serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--sans);color:var(--paper);background:#030A24;-webkit-font-smoothing:antialiased;overflow:hidden}

.stage{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(60% 50% at 20% 10%,rgba(222,41,16,.24),transparent 60%),
             radial-gradient(50% 40% at 85% 90%,rgba(28,143,184,.2),transparent 60%),#030A24}
.phone{position:relative;width:100%;height:100%;overflow:hidden;background:var(--deep)}
@media (min-width:640px){
  .phone{width:390px;height:min(844px,94vh);border-radius:44px;
    box-shadow:0 40px 120px rgba(0,0,0,.6),0 0 0 10px #0d1730,0 0 0 12px #1c2a4d}
}

.pages{height:100%;overflow-y:auto;scroll-snap-type:y mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.pages::-webkit-scrollbar{display:none}
.page{position:relative;height:100%;scroll-snap-align:start;scroll-snap-stop:always;
  padding:64px 28px 72px;display:flex;flex-direction:column;overflow:hidden;isolation:isolate}

/* Night-harbour backdrop */
.sky{position:absolute;inset:0;z-index:-1;overflow:hidden;
  background:linear-gradient(180deg,var(--deep) 0%,var(--navy) 50%,#12306F 75%,#0B4E6E 100%)}
.sky span{position:absolute;border-radius:50%;filter:blur(48px);opacity:.8;mix-blend-mode:screen;
  animation:drift 18s ease-in-out infinite alternate}
.sky .a1{width:320px;height:320px;left:-90px;top:-60px;background:var(--red);opacity:.55}
.sky .a2{width:280px;height:280px;right:-110px;top:26%;background:var(--amber);opacity:.45;animation-delay:-6s}
.sky .a3{width:340px;height:340px;left:0;bottom:-150px;background:var(--sea);animation-delay:-11s}
.moon{position:absolute;right:48px;top:16%;width:64px;height:64px;border-radius:50%;
  background:radial-gradient(circle at 40% 40%,#FFF4D0,#FFD98A 60%,rgba(255,209,102,0) 72%);
  filter:blur(1px);opacity:.9}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(30px,-40px) scale(1.15)}}

/* Harbour skyline silhouette + water */
.skyline{position:absolute;left:0;right:0;bottom:16%;height:64px;z-index:-1;opacity:.5;
  background:no-repeat bottom/100% 100% url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 354 120' preserveAspectRatio='none'%3E%3Cpath fill='%23020a26' d='M0 120V96h14V84h10v12h12V70h16v26h8V80h14v16h10V58h6l6-14 6 14h6v38h12V74h18v22h10V40h8V20l4-12 4 12v20h8v56h10V66h16v30h12V52l10-8 10 8v44h10V78h14v18h12V60h18v36h10V86h14v10h12V70h20v26h14v24z'/%3E%3C/svg%3E")}
.waves{position:absolute;left:0;right:0;bottom:0;height:16%;z-index:-1;
  background:repeating-linear-gradient(180deg,rgba(255,209,102,.08) 0 1px,transparent 1px 12px),
             linear-gradient(180deg,rgba(11,78,110,.55),rgba(5,15,51,.9))}

/* Fireworks */
.fireworks i{position:absolute;z-index:-1;width:120px;height:120px;border-radius:50%;
  background:repeating-conic-gradient(from 0deg,var(--gold) 0 2deg,transparent 2deg 15deg);
  -webkit-mask:radial-gradient(circle,transparent 18%,#000 20%,#000 46%,transparent 50%);
          mask:radial-gradient(circle,transparent 18%,#000 20%,#000 46%,transparent 50%);
  opacity:0;animation:burst 4.8s ease-out infinite}
.fireworks i:nth-child(1){left:18px;top:14%}
.fireworks i:nth-child(2){right:26px;top:36%;width:90px;height:90px;
  background:repeating-conic-gradient(from 0deg,var(--rose) 0 2deg,transparent 2deg 15deg);animation-delay:-1.6s}
.fireworks i:nth-child(3){left:40%;top:6%;width:70px;height:70px;animation-delay:-3.2s}
@keyframes burst{0%{transform:scale(.2);opacity:0}12%{opacity:.8}45%{transform:scale(1);opacity:.25}60%,100%{transform:scale(1.1);opacity:0}}

.grain{position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.06'/%3E%3C/svg%3E")}

.kicker{font-size:13px;letter-spacing:.18em;color:var(--paper-dim)}
.kicker.gold{color:var(--gold);letter-spacing:.08em;margin-bottom:10px}
h1,h2{font-family:var(--serif);font-weight:900;line-height:1.15}
h1{font-size:44px;letter-spacing:.02em}
h2{font-size:30px;margin-bottom:6px}
.lede{font-size:14px;line-height:1.85;color:var(--paper-dim)}
p{font-size:15px;line-height:1.85}
.grad{background:linear-gradient(90deg,#fff 0%,var(--gold) 50%,var(--amber) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.rule{width:40px;height:2px;background:linear-gradient(90deg,var(--red),var(--gold));margin:6px 0 22px;border-radius:2px}

/* Cover */
.cover{justify-content:space-between}
.org{width:100%;display:flex;align-items:center;justify-content:center;gap:16px;font-weight:700;font-size:28px;line-height:56px;letter-spacing:.08em}
.seal{width:56px;height:56px;border-radius:8px;display:block;object-fit:cover;flex:none}
.year{font-family:var(--serif);font-weight:900;font-size:120px;line-height:.9;letter-spacing:-.04em;color:transparent;
  -webkit-text-stroke:1.5px rgba(255,255,255,.55);margin-left:-6px}
.year b{-webkit-text-stroke:0;background:linear-gradient(120deg,#fff,var(--gold) 45%,var(--red));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.cover h1{margin-top:8px}
.cover .sub{font-size:19px;font-weight:700;letter-spacing:.14em;margin-top:6px}
.cover .slogan{margin-top:16px;font-family:var(--serif);font-size:19px;font-weight:600;letter-spacing:.3em;color:var(--gold)}
.cover .meta{margin-top:22px;font-size:14px;line-height:1.9;color:var(--paper-dim)}
.cover .meta strong{color:#fff;font-weight:700;font-size:18px;display:block;letter-spacing:.04em}
.swipe{position:absolute;left:0;right:0;bottom:22px;text-align:center;font-size:12px;letter-spacing:.2em;color:var(--paper-dim)}
.swipe::after{content:"";display:block;width:18px;height:18px;margin:6px auto 0;border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;transform:rotate(45deg);animation:bob 1.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(45deg)}50%{transform:translateY(6px) rotate(45deg)}}

/* Letter */
.letter h2{font-size:24px}
.letter p{margin-bottom:14px;color:rgba(255,255,255,.9);text-indent:2em}
.letter .sign{margin-top:auto;text-align:right;font-family:var(--serif);font-size:15px;line-height:1.9;color:var(--paper-dim)}

/* Timeline */
.timeline{margin-top:14px;list-style:none;position:relative}
.timeline::before{content:"";position:absolute;left:44px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,var(--gold),var(--red))}
.timeline li{display:grid;grid-template-columns:34px 20px 1fr;gap:0 10px;align-items:start;padding:10px 0}
.timeline time{font-variant-numeric:tabular-nums;font-weight:700;font-size:15px;color:var(--gold)}
.timeline i{width:10px;height:10px;border-radius:50%;background:var(--paper);margin:6px 0 0 5px;box-shadow:0 0 0 4px rgba(222,41,16,.35)}
.timeline strong{display:block;font-size:16px;font-weight:700}
.timeline small{display:block;font-size:13px;color:var(--paper-dim);line-height:1.6;margin-top:2px}
.note{margin-top:auto;font-size:12.5px;color:var(--gold)}

/* Info */
.info dl{margin-top:12px;display:grid;gap:14px}
.info dt{font-size:12px;letter-spacing:.16em;color:var(--paper-dim);margin-bottom:3px}
.info dd{font-size:18px;font-weight:700;line-height:1.5}
.info dd.long{font-family:var(--serif);font-size:16px;line-height:1.6;color:var(--gold)}
.info dd small{display:block;font-size:13px;font-weight:400;color:var(--paper-dim);margin-top:2px}

/* Support */
.cards{list-style:none;margin-top:20px;display:grid;gap:12px}
.cards li{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  border-left:3px solid var(--red)}
.cards b{display:block;font-family:var(--serif);font-size:17px;margin-bottom:4px}
.cards span{display:block;font-size:13px;line-height:1.65;color:var(--paper-dim)}

/* Signup */
.signup{align-items:center;text-align:center;justify-content:center;padding-top:56px}
.signup .rule{margin-left:auto;margin-right:auto}
.deposit{margin:4px 0 6px;padding:14px 26px;border-radius:18px;
  background:linear-gradient(rgba(5,15,51,.6),rgba(5,15,51,.6)) padding-box,linear-gradient(135deg,var(--gold),var(--red)) border-box;
  border:2px solid transparent}
.deposit b{display:block;font-family:var(--serif);font-size:34px;color:var(--gold);line-height:1.2;margin:2px 0}
.deposit small{display:block;font-size:12px;color:var(--paper-dim);letter-spacing:.06em}
.steps{margin:20px 0 0;padding:0;list-style:none;counter-reset:s;text-align:left;max-width:300px;display:grid;gap:10px}
.steps li{counter-increment:s;position:relative;padding-left:26px;font-size:13px;line-height:1.65;color:rgba(255,255,255,.9)}
.steps li::before{content:counter(s);position:absolute;left:0;top:1px;width:18px;height:18px;border-radius:50%;
  font-size:11px;font-weight:700;color:var(--ink);display:grid;place-items:center;
  background:linear-gradient(135deg,var(--gold),var(--amber))}
.steps em{font-style:normal;color:var(--gold);font-weight:700}
.deadline{margin-top:18px;font-size:12.5px;color:var(--gold);letter-spacing:.04em}

/* End */
.end{justify-content:center;text-align:center;align-items:center}
.end .rule{margin-left:auto;margin-right:auto}
.end .qr{width:128px;height:128px;margin:18px 0;display:block;object-fit:contain}
.end h2{font-size:40px}
.end .contact{font-size:14px;line-height:2;color:var(--paper-dim)}
.end .contact strong{font-family:var(--serif);font-size:20px;color:#fff;letter-spacing:.1em}
.end .motto{margin-top:34px;font-family:var(--serif);font-weight:600;font-size:18px;letter-spacing:.3em;color:var(--gold)}

/* Chrome */
.dots{position:absolute;right:12px;top:50%;transform:translateY(-50%);display:grid;gap:9px;z-index:5}
.dots button{width:6px;height:6px;border-radius:50%;border:0;padding:0;cursor:pointer;background:rgba(255,255,255,.35);transition:all .25s ease}
.dots button.on{background:#fff;height:18px;border-radius:3px}
.music{position:absolute;right:16px;top:18px;z-index:5;width:34px;height:34px;border-radius:50%;border:1px solid rgba(255,255,255,.35);
  background:rgba(0,0,0,.2);color:#fff;cursor:pointer;display:grid;place-items:center}
.music svg{animation:spin 4s linear infinite}
.music.off svg{animation-play-state:paused;opacity:.5}
@keyframes spin{to{transform:rotate(360deg)}}

@media (prefers-reduced-motion:reduce){.sky span,.swipe::after,.music svg,.fireworks i{animation:none}.fireworks i{opacity:.3}}
@media (max-height:700px){.year{font-size:92px}h1{font-size:36px}.page{padding-top:52px}
  .letter p{font-size:14px;line-height:1.75}.timeline li{padding:7px 0}.info dl{gap:10px}}