/* =========================================================
   给关键性的 21 岁 · v2
   黑白灰 · 金色点缀 · iPhone Safari 优先
   ========================================================= */

:root{
  --bg:#050505;
  --card:#111113;
  --card-2:#17171a;
  --line:#1e1e20;
  --line-strong:#2c2c2e;
  --text:#f5f5f7;
  --muted:#8e8e93;
  --muted-2:#5b5b60;
  --gold:#d9b36c;
  --gold-soft:#f2d49a;
  --danger:#e06c5f;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.32,.72,.24,1);
}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overscroll-behavior:none;
}
button,input{font-family:var(--font);color:inherit}
button{background:none;border:none;cursor:pointer}
input{outline:none}
::selection{background:rgba(217,179,108,.28)}

#app{position:fixed;inset:0}

/* ---------- 页面容器与过渡 ---------- */
.page{
  position:absolute;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;
  padding:calc(30px + env(safe-area-inset-top)) 24px calc(30px + env(safe-area-inset-bottom));
  opacity:0;visibility:hidden;transform:translateY(22px) scale(.995);
  transition:opacity .7s var(--ease),transform .7s var(--ease),visibility .7s;
  overflow-y:auto;-webkit-overflow-scrolling:touch;
  z-index:1;will-change:opacity,transform;
}
.page.active{opacity:1;visibility:visible;transform:translateY(0) scale(1);z-index:2}
.content{width:100%;max-width:560px;margin:auto;display:flex;flex-direction:column;align-items:center}

.small-label{font-size:12px;letter-spacing:.38em;color:var(--muted);text-transform:uppercase;font-weight:600}
.page-title{margin-top:18px;font-size:clamp(27px,7.2vw,40px);font-weight:700;letter-spacing:.01em;line-height:1.2}
.sub{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.75;font-weight:400}
.hidden{display:none !important}

.btn{
  display:inline-block;margin-top:34px;padding:15px 38px;border-radius:980px;
  background:var(--text);color:#0a0a0a;font-size:16px;font-weight:600;letter-spacing:.04em;
  transition:transform .25s ease,opacity .25s ease,background .25s ease,box-shadow .25s ease;
}
.btn:active{transform:scale(.965);opacity:.82}
.btn.ghost{background:transparent;color:var(--text);border:1px solid rgba(245,245,247,.32)}
.btn.ghost:active{background:rgba(245,245,247,.08)}
.btn:disabled{opacity:.28;pointer-events:none}

/* ---------- 音乐开关 ---------- */
#music-toggle{
  position:fixed;top:calc(14px + env(safe-area-inset-top));right:18px;z-index:120;
  width:42px;height:42px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,20,23,.55);border:1px solid rgba(245,245,247,.18);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  opacity:.85;transition:opacity .3s ease,transform .25s ease,border-color .3s ease;
}
#music-toggle:active{transform:scale(.92)}
#music-toggle svg{width:18px;height:18px;fill:none;stroke:var(--text);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
#music-toggle .ic-off{display:none}
#music-toggle.off .ic-on{display:none}
#music-toggle.off .ic-off{display:block}
#music-toggle.playing{opacity:1;border-color:rgba(217,179,108,.5)}
#music-toggle.playing .ic-on{stroke:var(--gold-soft)}

/* ---------- 入口 ---------- */
.entry > *{opacity:0;transform:translateY(20px);animation:rise 1s var(--ease) forwards}
.entry .date{font-size:14px;letter-spacing:.42em;color:var(--muted);font-weight:500;animation-delay:.15s}
.entry .kicker{margin-top:50px;font-size:13px;letter-spacing:.55em;color:var(--muted-2);font-weight:600;animation-delay:.35s}
.entry .name{margin-top:10px;font-size:clamp(54px,16vw,104px);font-weight:700;letter-spacing:.02em;line-height:1.05;animation-delay:.5s}
.entry .lead{margin-top:22px;font-size:17px;color:var(--muted);letter-spacing:.08em;animation-delay:.7s}
.entry .btn{animation-delay:.9s}
@keyframes rise{to{opacity:1;transform:translateY(0)}}

/* ---------- 信封 ---------- */
.envelope-scene{perspective:1200px}
.envelope{
  position:relative;width:300px;height:205px;margin-top:46px;
  transform-style:preserve-3d;cursor:pointer;
  animation:envFloat 4s ease-in-out infinite;
}
@keyframes envFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.env-back,.env-front,.env-flap{position:absolute;left:0;top:0;width:100%;height:100%}
.env-back{background:linear-gradient(145deg,#1b1b1d,#101011);border-radius:12px;box-shadow:0 30px 60px rgba(0,0,0,.45)}
.env-letter{
  position:absolute;left:16px;right:16px;bottom:12px;height:156px;z-index:2;
  background:linear-gradient(180deg,#ffffff,#f2f2f4);color:#111;border-radius:9px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  transition:transform .95s cubic-bezier(.22,.8,.24,1) .4s;
  box-shadow:0 12px 30px rgba(0,0,0,.35);
}
.env-letter .to{font-size:20px;font-weight:700;letter-spacing:.08em}
.env-letter .from{margin-top:10px;font-size:13px;color:#6e6e73;letter-spacing:.25em}
.env-front{z-index:3;background:linear-gradient(180deg,#262629,#1c1c1e);clip-path:polygon(0 0,50% 52%,100% 0,100% 100%,0 100%);border-radius:12px}
.env-front::after{content:"";position:absolute;left:0;right:0;bottom:0;height:48%;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,0));border-radius:0 0 12px 12px}
.env-flap{z-index:4;background:linear-gradient(180deg,#333336,#242426);clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:top center;backface-visibility:visible;transition:transform .75s cubic-bezier(.5,.05,.3,1);border-radius:12px 12px 0 0}
.env-seal{
  position:absolute;left:50%;top:calc(52% - 23px);transform:translate(-50%,0);
  width:46px;height:46px;border-radius:50%;z-index:5;
  background:radial-gradient(circle at 35% 30%,var(--gold-soft),var(--gold) 55%,#a9853f 100%);
  display:flex;align-items:center;justify-content:center;color:#17130a;
  font-size:12px;font-weight:800;letter-spacing:.05em;box-shadow:0 6px 16px rgba(0,0,0,.4);
  transition:opacity .4s ease,transform .75s cubic-bezier(.5,.05,.3,1);
}
.envelope.open{cursor:default;animation:none}
.envelope.open .env-flap{transform:rotateX(180deg);z-index:1}
.envelope.open .env-seal{opacity:0;transform:translate(-50%,-30px)}
.envelope.open .env-letter{transform:translateY(-95px)}
.env-hint{margin-top:38px;font-size:14px;color:var(--muted);letter-spacing:.14em}
.btn-after{margin-top:24px}

/* ---------- 钥匙考卷 ---------- */
.exam-head{width:100%;max-width:480px}
.exam-head .row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-top:16px}
.exam-count{font-size:12px;color:var(--muted);letter-spacing:.16em;font-variant-numeric:tabular-nums}
.exam-progress-wrap{position:absolute;left:0;top:calc(100px + env(safe-area-inset-top));width:100%;height:1px;background:#1c1c1e}
.exam-progress{height:1px;background:var(--gold);width:0;transition:width .5s var(--ease)}
.q-stage{position:relative;width:100%;max-width:480px;margin-top:44px}
.q-slide{
  width:100%;padding:32px 26px 30px;background:var(--card);border:1px solid var(--line);
  border-radius:26px;text-align:left;
  animation:slideUp .6s var(--ease);
}
@keyframes slideUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}
.q-num{font-size:12px;font-weight:700;letter-spacing:.24em;color:var(--muted-2)}
.q-text{margin-top:18px;font-size:20px;font-weight:600;line-height:1.5;color:var(--text)}
.q-input{
  width:100%;margin-top:24px;padding:15px 16px;background:#171719;
  border:1px solid var(--line-strong);border-radius:15px;font-size:17px;color:var(--text);
  transition:border-color .3s ease,background .3s ease;
}
.q-input::placeholder{color:#4a4a4f}
.q-input:focus{border-color:#6e6e73;background:#1a1a1d}
.q-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px}
.hint-btn{padding:10px 16px;border-radius:980px;font-size:13px;color:var(--muted);border:1px solid rgba(245,245,247,.2);letter-spacing:.06em;transition:background .25s ease,color .25s ease}
.hint-btn:active{background:rgba(245,245,247,.08)}
.hint-box{max-height:0;overflow:hidden;opacity:0;transition:max-height .4s var(--ease),opacity .4s ease,margin-top .4s ease;font-size:14px;color:var(--gold-soft);line-height:1.6}
.hint-box.show{max-height:80px;opacity:1;margin-top:14px}
.q-actions{margin-top:24px;display:flex;gap:12px}
.q-actions .btn{flex:1;margin-top:0;padding:14px 18px}
.q-error{margin-top:14px;min-height:20px;font-size:14px;color:var(--danger);letter-spacing:.04em}
.q-slide.wrong-hard{border-color:var(--danger);animation:shakeHard .55s cubic-bezier(.36,.07,.19,.97)}
.q-slide.wrong-hard .q-input{border-color:rgba(224,108,95,.6)}
@keyframes shakeHard{
  10%,90%{transform:translateX(-3px)}
  20%,80%{transform:translateX(7px)}
  30%,50%,70%{transform:translateX(-11px)}
  40%,60%{transform:translateX(11px)}
}
.pass-overlay{
  position:fixed;inset:0;z-index:150;background:rgba(5,5,5,.9);
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity .4s ease,visibility .4s;
}
.pass-overlay.show{opacity:1;visibility:visible}
.pass-card{text-align:center}
.pass-mark{width:72px;height:72px;margin:0 auto;border-radius:50%;border:1.5px solid var(--gold);display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:32px;font-weight:300}
.pass-title{margin-top:24px;font-size:26px;font-weight:700;letter-spacing:.06em}
.pass-sub{margin-top:10px;font-size:14px;color:var(--muted);letter-spacing:.2em}

/* ---------- 15 句预告 ---------- */
.page-trailer{padding:0}
.trailer-top{flex:0 0 auto;width:100%;max-width:560px;padding:calc(24px + env(safe-area-inset-top)) 28px 0;display:flex;align-items:center;gap:14px}
.trailer-top .small-label{flex:1;text-align:left;white-space:nowrap}
.trailer-count{font-size:12px;color:var(--muted);letter-spacing:.15em;font-variant-numeric:tabular-nums}
.trailer-progress-wrap{position:absolute;left:0;top:calc(76px + env(safe-area-inset-top));width:100%;height:1px;background:#1c1c1e}
.trailer-progress{height:1px;background:var(--gold);width:0;transition:width .45s var(--ease)}
.trailer-viewport{flex:1;width:100%;overflow:hidden;touch-action:pan-y;margin-top:calc(12px + env(safe-area-inset-top))}
.trailer-track{display:flex;height:100%;transition:transform .55s cubic-bezier(.3,.75,.25,1);will-change:transform}
.trailer-card{flex:0 0 100%;height:100%;display:flex;align-items:center;justify-content:center;padding:0 34px calc(20px + env(safe-area-inset-bottom))}
.trailer-card p{max-width:480px;font-size:clamp(24px,6.8vw,36px);font-weight:600;line-height:1.55;letter-spacing:.01em}
.trailer-card .sig{display:block;margin-top:26px;font-size:14px;font-weight:500;color:var(--muted);letter-spacing:.28em}
.trailer-nav{flex:0 0 auto;width:100%;max-width:560px;padding:0 28px calc(26px + env(safe-area-inset-bottom));display:flex;justify-content:space-between;align-items:center;gap:14px}
.nav-btn{padding:13px 24px;border-radius:980px;font-size:14px;font-weight:500;color:var(--text);border:1px solid rgba(245,245,247,.26);transition:background .25s ease,transform .25s ease}
.nav-btn:active{background:rgba(245,245,247,.1);transform:scale(.96)}
.nav-btn:disabled{opacity:.22;pointer-events:none}
.nav-btn.next{background:var(--text);color:#0a0a0a;border-color:transparent}

/* ---------- 长信纵向阅读：黑底上嵌一张白纸 ---------- */
.page-letter-scroll{padding:0;justify-content:flex-start}
.letter-scroll-head{
  position:sticky;top:0;z-index:12;flex:0 0 auto;
  width:100%;max-width:560px;margin:0 auto;
  padding:calc(16px + env(safe-area-inset-top)) 28px 12px;
  display:flex;align-items:center;gap:12px;
  background:rgba(5,5,5,.76);
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.letter-scroll-head .small-label{flex:1;text-align:left;white-space:nowrap}
.letter-scroll-pct{font-size:11px;color:var(--muted);letter-spacing:.14em;font-variant-numeric:tabular-nums}
.letter-scroll-progress{position:absolute;left:0;bottom:-1px;width:100%;height:1px;background:rgba(255,255,255,.07)}
.letter-scroll-progress span{display:block;height:1px;width:0;background:var(--gold);transition:width .15s linear}

/* 信纸本体：黑底上的一张泛黄旧信纸 */
.letter-scroll-content{
  flex:0 0 auto;width:calc(100% - 32px);max-width:560px;margin:18px auto 0;
  padding:54px 32px 62px;text-align:left;
  color:#3b3020;
  font-family:"Noteworthy","Bradley Hand","HanziPen SC","HanziPen TC","STKaiti","Kaiti SC","KaiTi",cursive;
  border-radius:14px;
  border:1px solid rgba(122,92,45,.22);
  background-color:#efe2bd;
  background-image:
    radial-gradient(circle at 10% 6%, rgba(150,108,45,.12), transparent 34%),
    radial-gradient(circle at 90% 94%, rgba(128,92,42,.11), transparent 30%),
    radial-gradient(circle at 84% 12%, rgba(150,108,45,.07), transparent 22%),
    repeating-linear-gradient(180deg, rgba(110,80,35,.055) 0px, rgba(110,80,35,.055) 1px, transparent 1px, transparent 34px),
    linear-gradient(180deg, #f3e7c6 0%, #ecdbb2 100%);
  background-size:100% 100%,100% 100%,100% 100%,100% 100%,100% 100%;
  box-shadow:
    0 40px 90px rgba(0,0,0,.55),
    0 6px 22px rgba(0,0,0,.38),
    inset 0 1px 0 rgba(255,250,230,.75),
    inset 0 -1px 0 rgba(120,88,40,.12);
}
.letter-block{opacity:0;transform:translateY(20px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.letter-block.lit{opacity:1;transform:translateY(0)}
.letter-header-block{padding:10px 0 52px;text-align:center}
.letter-header-block .small-label{font-family:var(--font);letter-spacing:.42em;color:#8b7652}
.letter-header-block .letter-title{margin-top:26px;font-size:clamp(42px,11vw,60px);font-weight:700;line-height:1.14;color:#312616}
.letter-header-block .letter-sub{margin-top:18px;font-size:16px;color:#8b7652;letter-spacing:.16em}
.letter-header-block .letter-line{margin:46px auto 0;width:38px;height:1px;background:var(--gold)}
.letter-body-block{padding:0 0 38px}
.letter-body-block p{
  font-size:clamp(20px,5.6vw,23px);line-height:1.95;color:#3b3020;letter-spacing:.015em;
  margin:0 0 1.2em;text-align:left;font-weight:400;
}
.letter-body-block p:last-child{margin-bottom:0}
.letter-body-block p strong{color:#281d0f;font-weight:700}
.letter-quote-block{padding:28px 0 42px}
.letter-quote-block p{
  font-size:clamp(22px,6vw,25px);line-height:2.05;font-weight:700;color:#312616;letter-spacing:.008em;
  margin:0 0 .75em;text-align:left;
}
.letter-quote-block p strong{font-weight:700}
.letter-quote-block .quote-attr{font-family:var(--font);font-size:14px !important;font-weight:500 !important;color:#8b7652 !important;letter-spacing:.14em !important;margin-top:22px !important}
.letter-dialogue-block{padding:28px 0 42px}
.letter-dialogue-block p{
  font-size:clamp(21px,5.8vw,24px);line-height:2;font-weight:700;color:#312616;letter-spacing:.008em;
  margin:0 0 .95em;text-align:left;
}
.letter-dialogue-block p strong{font-weight:700}
.letter-sign-block{padding:56px 0 16px;text-align:center}
.letter-sign-block .sign-kicker{font-family:var(--font);font-size:11px;letter-spacing:.42em;color:#8b7652}
.letter-sign-block .sign-title{margin-top:20px;font-size:clamp(42px,11vw,60px);font-weight:700;color:#312616}
.letter-sign-block .sign-sub{font-family:var(--font);margin-top:18px;font-size:14px;color:#8b7652;letter-spacing:.2em}
.letter-next-wrap{
  flex:0 0 auto;width:100%;max-width:560px;margin:0 auto;
  padding:24px 28px calc(46px + env(safe-area-inset-bottom));
  display:flex;justify-content:center;
}
.letter-next-wrap .btn{margin-top:0}

/* ---------- 时间线 + 照片 ---------- */
.timeline-page .content{max-width:540px;text-align:left}
.timeline-page .small-label,.timeline-page .page-title,.timeline-page .sub{text-align:center;align-self:center}
.timeline{position:relative;width:100%;margin-top:46px;padding-left:8px}
.timeline::before{content:"";position:absolute;left:22px;top:8px;bottom:12px;width:1px;background:linear-gradient(180deg,transparent,#3a3a3e 8%,#3a3a3e 92%,transparent)}
.tl-item{position:relative;padding:0 0 42px 64px;opacity:0;transform:translateY(20px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.tl-item.lit{opacity:1;transform:translateY(0)}
.tl-dot{position:absolute;left:15px;top:8px;width:15px;height:15px;border-radius:50%;background:#0b0b0d;border:1.5px solid #38383d;transition:background .5s ease,border-color .5s ease,box-shadow .5s ease}
.tl-item.lit .tl-dot{background:var(--gold);border-color:var(--gold-soft);box-shadow:0 0 20px rgba(217,179,108,.65)}
.tl-date{font-size:12px;letter-spacing:.18em;color:var(--muted-2);font-weight:600}
.tl-place{margin-top:8px;font-size:21px;font-weight:700;color:var(--text)}
.tl-text{margin-top:9px;font-size:14.5px;line-height:1.8;color:var(--muted)}
.tl-photo{
  max-height:0;opacity:0;margin-top:0;overflow:hidden;border-radius:18px;
  transform:translateY(14px);transition:max-height .8s var(--ease),opacity .7s ease,transform .8s var(--ease),margin-top .8s var(--ease);
}
.tl-item.lit .tl-photo,.tl-item:hover .tl-photo{
  max-height:430px;opacity:1;margin-top:18px;transform:translateY(0);
}
.tl-photo img{
  display:block;width:100%;max-width:280px;aspect-ratio:4/5;object-fit:cover;
  border-radius:16px;border:1px solid rgba(255,255,255,.09);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  filter:saturate(.92) contrast(1.02);
  cursor:zoom-in;
}
.tl-photo-cap{
  display:block;margin-top:9px;font-size:11px;letter-spacing:.18em;color:var(--muted-2);
}
.tl-end{margin-top:-10px;padding-bottom:20px}
.tl-end .tl-place{color:var(--gold-soft)}
.timeline-page .btn{margin-top:8px}
@media (hover:hover) and (pointer:fine){
  .tl-item .tl-photo{max-height:0;opacity:0;margin-top:0;transform:translateY(14px)}
  .tl-item:hover .tl-photo,.tl-item.lit .tl-photo{max-height:430px;opacity:1;margin-top:18px;transform:translateY(0)}
}

/* ---------- 排序闯关 ---------- */
.sort-page .content{max-width:500px}
.sort-sub{margin-top:12px;font-size:14px;color:var(--muted);line-height:1.7}
.sort-grid{margin-top:34px;width:100%;display:flex;flex-wrap:wrap;gap:11px;justify-content:center}
.sort-chip{
  padding:13px 19px;border-radius:980px;background:var(--card);
  border:1px solid var(--line-strong);font-size:14px;color:var(--text);letter-spacing:.03em;
  transition:transform .25s ease,opacity .25s ease,border-color .25s ease,background .25s ease;
}
.sort-chip:active{transform:scale(.94)}
.sort-chip.used{opacity:.22;border-color:var(--gold);background:transparent;pointer-events:none}
.sort-chain{margin-top:30px;width:100%;display:flex;flex-wrap:wrap;gap:9px;justify-content:center;min-height:40px}
.sort-chain-item{
  display:flex;align-items:center;gap:8px;padding:10px 14px;border-radius:980px;
  background:rgba(217,179,108,.08);border:1px solid rgba(217,179,108,.35);
  color:var(--gold-soft);font-size:13px;letter-spacing:.04em;
  animation:chipIn .4s var(--ease);
}
.sort-chain-item .n{font-size:11px;font-weight:700;color:var(--gold)}
@keyframes chipIn{from{opacity:0;transform:scale(.7)}to{opacity:1;transform:scale(1)}}
.wrong-hard{border-color:var(--danger) !important;animation:shakeHard .55s cubic-bezier(.36,.07,.19,.97)}
.sort-actions{margin-top:30px;display:flex;gap:12px;width:100%}
.sort-actions .btn{flex:1;margin-top:0}

/* ---------- 回忆馆 ---------- */
.gallery-page .content{max-width:540px;text-align:left}
.gallery-page .small-label,.gallery-page .page-title,.gallery-page .sub{text-align:center;align-self:center}
.gallery-page .page-title,.gallery-page .sub{width:100%}
.gallery-grid{margin-top:34px;width:100%;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.tile{position:relative;aspect-ratio:4/5;border-radius:20px;overflow:hidden;background:linear-gradient(160deg,#131315,#0a0a0b);border:1px solid var(--line);cursor:default;transform:translateZ(0)}
.tile.has-img{cursor:pointer}
.tile-photo{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .8s ease}
.tile.has-img .tile-photo{opacity:1}
.tile-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px}
.tile.has-img .tile-placeholder{display:none}
.tile-char{font-size:58px;font-weight:200;color:#3a3a3e;letter-spacing:.05em}
.tile-cap{margin-top:18px;font-size:14px;font-weight:600;color:var(--text);letter-spacing:.06em;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.tile-sub{margin-top:6px;font-size:11px;color:var(--muted);letter-spacing:.12em}
.tile-shade{position:absolute;left:0;right:0;bottom:0;height:38%;background:linear-gradient(180deg,rgba(0,0,0,0),rgba(0,0,0,.55));opacity:0;transition:opacity .8s ease;pointer-events:none}
.tile.has-img .tile-shade{opacity:1}
.gallery-note{margin-top:16px;text-align:center;font-size:13px;color:var(--muted-2);letter-spacing:.08em}
.gallery-page .btn{align-self:center}
.lightbox{position:fixed;inset:0;z-index:160;background:rgba(0,0,0,.94);display:flex;flex-direction:column;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s;padding:40px 22px}
.lightbox.show{opacity:1;visibility:visible}
.lightbox img{max-width:100%;max-height:calc(100vh - 130px);border-radius:14px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.lightbox-cap{margin-top:24px;font-size:15px;color:var(--text);letter-spacing:.08em}
.lightbox-sub{margin-top:7px;font-size:13px;color:var(--muted);letter-spacing:.14em}
.lightbox-close{margin-top:26px;padding:11px 28px;border:1px solid rgba(245,245,247,.3);border-radius:980px;font-size:14px;color:var(--text)}

/* ---------- 刮刮卡 ---------- */
.scratch-card{
  position:relative;width:min(320px,86vw);aspect-ratio:16/10;margin-top:42px;
  background:linear-gradient(155deg,#141416,#0d0d0f);
  border:1px solid var(--line-strong);border-radius:22px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 30px 70px rgba(0,0,0,.5);
}
.scratch-msg{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center}
.scratch-msg .big{font-size:clamp(22px,6.4vw,30px);font-weight:700;color:var(--text);line-height:1.4}
.scratch-msg .small{margin-top:12px;font-size:13px;color:var(--muted);letter-spacing:.12em}
.scratch-msg .gold{color:var(--gold-soft)}
#scratch-canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none;border-radius:22px}
.scratch-hint{margin-top:22px;font-size:14px;color:var(--muted);letter-spacing:.1em;min-height:20px}

/* ---------- 默契问卷 ---------- */
.quiz-head{width:100%;max-width:480px}
.quiz-head .row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-top:16px}
.quiz-count{font-size:12px;color:var(--muted);letter-spacing:.16em;font-variant-numeric:tabular-nums}
.quiz-progress-wrap{position:absolute;left:0;top:calc(100px + env(safe-area-inset-top));width:100%;height:1px;background:#1c1c1e}
.quiz-progress{height:1px;background:var(--gold);width:0;transition:width .5s var(--ease)}
.quiz-stage{position:relative;width:100%;max-width:480px;margin-top:42px}
.quiz-slide{animation:slideUp .55s var(--ease)}
.quiz-q{margin-top:18px;font-size:21px;font-weight:650;line-height:1.5;color:var(--text)}
.quiz-options{margin-top:28px;display:flex;flex-direction:column;gap:12px;text-align:left}
.quiz-option{
  width:100%;padding:16px 19px;border-radius:17px;background:var(--card);
  border:1px solid var(--line-strong);font-size:16px;color:var(--text);text-align:left;
  transition:transform .22s ease,border-color .25s ease,background .25s ease,opacity .25s ease;
}
.quiz-option:active{transform:scale(.975)}
.quiz-option.selected{border-color:var(--gold);background:rgba(217,179,108,.07);color:var(--gold-soft)}
.quiz-back{margin-top:24px;padding:10px 20px;border-radius:980px;font-size:13px;color:var(--muted);border:1px solid rgba(245,245,247,.2)}
.quiz-back:active{background:rgba(245,245,247,.07)}

/* ---------- 默契成绩单 ---------- */
.score-card{
  width:100%;max-width:440px;margin-top:38px;padding:44px 28px 40px;
  background:linear-gradient(165deg,#141416,#0c0c0e);border:1px solid #26262a;border-radius:28px;
  box-shadow:0 34px 80px rgba(0,0,0,.5);position:relative;overflow:hidden;
}
.score-card::before{content:"";position:absolute;top:-70px;right:-70px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(217,179,108,.16),transparent 70%)}
.score-percent{margin-top:8px;font-size:clamp(58px,17vw,84px);font-weight:700;letter-spacing:.01em;color:var(--text);font-variant-numeric:tabular-nums}
.score-percent .pct{font-size:.42em;color:var(--gold-soft);font-weight:600}
.score-title{margin-top:10px;font-size:22px;font-weight:700;color:var(--gold-soft);letter-spacing:.08em}
.score-desc{margin-top:16px;font-size:14.5px;color:var(--muted);line-height:1.8}
.score-matches{margin-top:22px;font-size:13px;color:var(--muted-2);letter-spacing:.06em}
.score-card .btn{margin-top:30px}

/* ---------- 吹蜡烛 ---------- */
.cake-scene{margin-top:38px;min-height:330px;display:flex;align-items:center;justify-content:center}
.cake-box{position:relative;width:250px;height:280px}
.candles{position:absolute;left:50%;top:36px;transform:translateX(-50%);display:flex;gap:16px;z-index:5}
.candle{position:relative;width:6px;height:52px;border-radius:3px;background:linear-gradient(180deg,#f7f7f9,#c8c8ce);box-shadow:inset 0 -4px 6px rgba(0,0,0,.18)}
.candle .wick{position:absolute;left:50%;top:-4px;transform:translateX(-50%);width:1.5px;height:6px;background:#3a3a3c}
.flame{
  position:absolute;left:50%;top:-21px;transform:translateX(-50%);width:13px;height:19px;
  border-radius:50% 50% 50% 50% / 62% 62% 38% 38%;
  background:radial-gradient(circle at 50% 72%,#fff8e0,#f3cc6b 52%,rgba(243,204,107,0) 74%);
  box-shadow:0 0 18px 6px rgba(230,185,90,.42);
  animation:flicker .17s infinite alternate ease-in-out;transform-origin:50% 90%;
}
@keyframes flicker{from{transform:translateX(-50%) scale(1) rotate(-1.6deg)}to{transform:translateX(-50%) scale(1.08,.94) rotate(1.6deg)}}
.candle.out .flame{display:none}
.candle.out{background:linear-gradient(180deg,#e6e6ea,#aaaab0)}
.smoke{position:absolute;left:50%;top:-18px;width:3px;height:12px;margin-left:-1.5px;background:linear-gradient(180deg,rgba(245,245,247,.5),rgba(245,245,247,0));filter:blur(2px);animation:smokeUp .9s ease-out forwards;border-radius:3px}
@keyframes smokeUp{from{opacity:.7;transform:translateY(0)}to{opacity:0;transform:translateY(-26px)}}
.cake-top{position:absolute;left:50%;top:74px;transform:translateX(-50%);width:170px;height:34px;border-radius:8px;background:linear-gradient(180deg,#fafafa,#e6e6ea);box-shadow:0 8px 18px rgba(0,0,0,.35)}
.cake-mid{position:absolute;left:50%;top:106px;transform:translateX(-50%);width:205px;height:52px;border-radius:10px;background:linear-gradient(180deg,#29292c,#19191b);border:1px solid #343437;display:flex;align-items:center;justify-content:center;box-shadow:0 14px 26px rgba(0,0,0,.4)}
.cake-mid span{font-size:22px;font-weight:700;color:#f5f5f7;letter-spacing:.12em}
.cake-base{position:absolute;left:50%;top:156px;transform:translateX(-50%);width:232px;height:42px;border-radius:10px;background:linear-gradient(180deg,#fafafa,#d8d8de);box-shadow:0 16px 30px rgba(0,0,0,.4)}
.cake-plate{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);width:272px;height:10px;border-radius:50%;background:linear-gradient(180deg,#38383b,#1b1b1e);box-shadow:0 10px 24px rgba(0,0,0,.5)}
.cake-instruction{margin-top:0;min-height:26px;font-size:15px;color:var(--muted);letter-spacing:.06em}
.cake-status{margin-top:8px;font-size:12px;color:var(--muted-2);letter-spacing:.2em;min-height:18px}

/* ---------- 结尾 ---------- */
.page-final{overflow:hidden}
#fx{position:absolute;inset:0;z-index:0;pointer-events:none}
.final{position:relative;z-index:1}
.final > *{opacity:0;transform:translateY(22px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1s cubic-bezier(.2,.7,.2,1)}
.final.show .small-label{opacity:1;transform:none;transition-delay:.1s}
.final.show .final-big{opacity:1;transform:none;transition-delay:.45s}
.final.show .final-line{opacity:1;transform:none;transition-delay:1.3s}
.final.show .final-sign{opacity:1;transform:none;transition-delay:2.1s}
.final.show .btn{opacity:1;transform:none;transition-delay:2.9s}
.final-big{margin-top:26px;font-size:clamp(36px,10vw,58px);font-weight:700;line-height:1.22;letter-spacing:.01em;max-width:520px}
.final-line{margin-top:28px;font-size:18px;color:var(--gold-soft);letter-spacing:.1em}
.final-sign{margin-top:16px;font-size:14px;color:var(--muted);letter-spacing:.3em}

@media (max-width:350px){
  .letter-scroll-content{width:calc(100% - 20px);padding:44px 22px 52px}
  .letter-body-block p{font-size:18px;line-height:1.9}
  .q-text{font-size:18px}
  .timeline-page .content{padding:0 6px}
}