:root{
    --pink:#ff8fb1;
    --pink-deep:#ff5e8a;
    --gold:#ffd98e;
    --purple:#b69cff;
    --ink:#fff4f7;
    --card:rgba(255,255,255,.07);
    --line:rgba(255,255,255,.18);
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;background-color:#10081f;}
  body{
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    background:linear-gradient(180deg,#10081f 0%,#1d0f33 30%,#2a1240 60%,#3b1430 100%);
    color:var(--ink);
    overflow-x:hidden;
    cursor:default;
  }
  ::selection{background:var(--pink-deep);color:#fff;}

  /* 所有 section 做渲染隔离，提升滚动性能 */
  section{content-visibility:auto;contain-intrinsic-size:1px 700px;}
  /* 大量使用的卡片移除 backdrop-filter，避免滚动时 GPU 堵塞白屏 */
  .mem-card,.q-card,
  .ticket,.quiz-score,
  .prelude,.heartbeat,.daily-card,.letter-box,.bubble.you,.scratch-card,.qian-result,
  .timer .cell,.envelope-stage{backdrop-filter:none !important;}

  canvas#sky{
    position:fixed;inset:0;width:100%;height:100%;z-index:0;
    pointer-events:none;
    will-change:contents;
    transform:translateZ(0);
    background:linear-gradient(180deg,#10081f 0%,#1d0f33 30%,#2a1240 60%,#3b1430 100%);
  }

  main{position:relative;z-index:1;}

  /* ---------- HERO ---------- */
  .hero{
    min-height:100vh;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    text-align:center;padding:40px 20px;position:relative;
  }
  
  /* 移动端顶部间距优化 */
  @media (max-width:768px){
    .hero{
      min-height:auto;
      padding:60px 18px 40px;
      justify-content:center;
    }
  }
  .hero .sub{letter-spacing:.5em;font-size:14px;color:var(--gold);opacity:.9;margin-bottom:18px;}
  
  /* 移动端 Hero 元素间距优化 */
  @media (max-width:768px){
    .hero .sub{
      font-size:11px;
      margin-bottom:8px;
      letter-spacing:.3em;
    }
  }
  .hero h1{
    font-size:clamp(40px,8vw,76px);font-weight:700;line-height:1.25;
    background:linear-gradient(120deg,#ffd6e3,#ff8fb1 40%,#ffd98e 80%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
    text-shadow:0 0 50px rgba(255,143,177,.25);
  }
  .big-num{
    font-size:clamp(90px,20vw,190px);font-weight:800;line-height:1;
    background:linear-gradient(180deg,#fff,#ffb3c9 55%,#ff5e8a);
    -webkit-background-clip:text;background-clip:text;color:transparent;
    filter:drop-shadow(0 6px 30px rgba(255,94,138,.45));
    font-variant-numeric:tabular-nums;
  }
  .hero .quote{margin-top:22px;font-size:16px;color:#ffd9e4;opacity:.85;line-height:2;}
  
  /* 移动端引言间距优化 */
  @media (max-width:768px){
    .hero .quote{
      margin-top:8px;
      font-size:14px;
      line-height:1.8;
    }
  }
  .timer{
    margin-top:28px;display:flex;gap:14px;flex-wrap:wrap;justify-content:center;
  }
  
  /* 移动端计时器间距优化 */
  @media (max-width:768px){
    .timer{
      margin-top:12px;
      gap:8px;
    }
  }
  .timer .cell{
    background:var(--card);border:1px solid var(--line);border-radius:16px;
    padding:12px 18px;min-width:84px;
  }
  
  /* 移动端计时器单元格优化 */
  @media (max-width:768px){
    .timer .cell{
      padding:8px 12px;
      min-width:65px;
      border-radius:12px;
    }
    .timer .cell b{font-size:22px;}
    .timer .cell span{font-size:11px;}
  }
  .timer .cell b{display:block;font-size:26px;color:var(--gold);font-variant-numeric:tabular-nums;}
  .timer .cell span{font-size:12px;opacity:.7;}
  .scroll-hint{
    position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
    font-size:13px;opacity:.6;animation:bob 2s ease-in-out infinite;
  }
  
  /* 移动端调整滚动提示位置 */
  @media (max-width:768px){
    .scroll-hint{
      bottom:8px;
      font-size:10px;
    }
  }
  @keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

  /* ---------- 通用 section ---------- */
  section{max-width:860px;margin:0 auto;padding:90px 22px;}
  .sec-title{text-align:center;margin-bottom:14px;font-size:clamp(26px,5vw,36px);}
  .sec-title em{font-style:normal;color:var(--pink);}
  .sec-sub{text-align:center;color:#ffd9e4;opacity:.7;font-size:14px;margin-bottom:54px;line-height:1.9;}
  
  /* 移动端章节间距优化 */
  @media (max-width:768px){
    section{padding:15px 20px;}
    .sec-title{margin-bottom:6px;font-size:clamp(22px,5vw,32px);}
    .sec-sub{margin-bottom:12px;font-size:13px;line-height:1.7;}
  }
  .divider{width:70px;height:3px;border-radius:3px;margin:18px auto 0;
    background:linear-gradient(90deg,transparent,var(--pink),transparent);}
  
  /* 移动端分隔线优化 */
  @media (max-width:768px){
    .divider{margin:8px auto 0;}
  }

  /* ---------- 序 ---------- */
  .prelude{
    background:var(--card);border:1px solid var(--line);border-radius:24px;
    padding:42px 34px;line-height:2.3;font-size:16px;color:#ffeef3;
    backdrop-filter:none;box-shadow:0 20px 60px rgba(0,0,0,.25);
    text-align:center;
  }
  .prelude b{color:var(--gold);font-weight:600;}
  
  /* 移动端序言内边距优化 */
  @media (max-width:768px){
    .prelude{
      padding:20px 18px;
      font-size:14px;
      line-height:1.9;
      border-radius:16px;
    }
  }

  /* ---------- 时间线 ---------- */
  .timeline{position:relative;padding-left:34px;}
  .timeline::before{
    content:"";position:absolute;left:10px;top:0;bottom:0;width:2px;
    background:linear-gradient(180deg,transparent,var(--pink) 8%,var(--purple) 92%,transparent);
  }
  .memory{
    position:relative;margin-bottom:42px;
    opacity:0;transform:translateY(36px);
    transition:opacity .8s ease,transform .8s ease;
  }
  
  /* 移动端时间线间距优化 */
  @media (max-width:768px){
    .timeline{padding-left:24px;}
    .memory{margin-bottom:16px;}
  }
  .memory.show{opacity:1;transform:none;}
  .memory::before{
    content:"";position:absolute;left:-30px;top:26px;width:13px;height:13px;border-radius:50%;
    background:var(--pink);box-shadow:0 0 0 5px rgba(255,143,177,.18),0 0 16px var(--pink);
  }
  .mem-card{
    background:var(--card);border:1px solid var(--line);border-radius:20px;
    padding:26px 28px;
    transition:transform .35s ease,box-shadow .35s ease,border-color .35s;
  }
  .mem-card:hover{
    transform:translateY(-5px);
    border-color:rgba(255,143,177,.55);
    box-shadow:0 18px 50px rgba(255,94,138,.18);
  }
  
  /* 移动端记忆卡片内边距优化 */
  @media (max-width:768px){
    .mem-card{
      padding:16px 18px;
      border-radius:14px;
    }
  }
  .mem-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
  
  /* 移动端记忆卡片标题间距优化 */
  @media (max-width:768px){
    .mem-head{
      gap:8px;
      margin-bottom:8px;
    }
  }
  .mem-date{
    font-size:12px;letter-spacing:.1em;color:#1d0f33;background:var(--gold);
    padding:4px 12px;border-radius:99px;font-weight:700;
  }
  .mem-title{font-size:19px;font-weight:700;color:#ffe2eb;}
  .mem-emoji{font-size:22px;margin-left:auto;filter:drop-shadow(0 0 8px rgba(255,255,255,.3));}
  .mem-text{font-size:15px;line-height:2.1;color:#f3e3ea;opacity:.92;}
  
  /* 移动端记忆文本优化 */
  @media (max-width:768px){
    .mem-text{
      font-size:14px;
      line-height:1.9;
    }
  }
  .mem-text b{color:var(--pink);font-weight:600;}
  .mem-tag{
    display:inline-block;margin-top:12px;margin-right:8px;font-size:12px;
    border:1px solid rgba(255,217,142,.45);color:var(--gold);
    border-radius:99px;padding:3px 12px;opacity:.85;
  }
  
  /* 移动端标签间距优化 */
  @media (max-width:768px){
    .mem-tag{
      margin-top:8px;
      margin-right:6px;
      font-size:11px;
      padding:2px 10px;
    }
  }

  /* ---------- 刮刮乐 ---------- */
  .scratch-wrap{display:flex;justify-content:center;}
  .scratch-card{
    position:relative;width:min(420px,92vw);height:230px;border-radius:20px;overflow:hidden;
    box-shadow:0 18px 50px rgba(0,0,0,.4);user-select:none;
  }
  .scratch-under{
    position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#ff5e8a,#b69cff);text-align:center;padding:20px;gap:8px;
  }
  .scratch-under .prize{font-size:30px;font-weight:800;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.25);}
  .scratch-under p{font-size:14px;color:#fff;opacity:.95;line-height:1.9;}
  canvas#scratch{position:absolute;inset:0;cursor:grab;touch-action:none;}
  .scratch-tip{text-align:center;margin-top:18px;font-size:13px;opacity:.65;}

  /* ---------- 求签 ---------- */
  .qian-area{
    display:flex;flex-direction:column;align-items:center;gap:34px;
    perspective:900px;
  }
  .qian-tube{
    width:136px;height:166px;border-radius:10px 10px 30px 30px;position:relative;cursor:pointer;
    -webkit-tap-highlight-color:transparent;
    background:
      radial-gradient(ellipse at 28% 12%,rgba(255,224,156,.42),transparent 28%),
      linear-gradient(90deg,rgba(255,217,142,.22),transparent 18%,rgba(31,8,4,.28) 52%,rgba(255,217,142,.18) 100%),
      linear-gradient(180deg,#9d4230 0%,#7a2f23 52%,#4f1d17 100%);
    border:1px solid #d28953;border-top:3px solid #f0bb72;
    box-shadow:
      inset 10px 0 18px rgba(255,214,146,.18),
      inset -14px 0 24px rgba(28,7,4,.5),
      inset 0 -12px 16px rgba(20,5,3,.42),
      0 18px 18px rgba(0,0,0,.24),
      0 34px 58px rgba(0,0,0,.36);
    display:flex;align-items:flex-end;justify-content:center;
    transform:rotateX(5deg);
    transform-style:preserve-3d;
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .qian-tube::before{
    content:"";position:absolute;left:11px;right:11px;top:-7px;height:18px;border-radius:50%;
    background:linear-gradient(180deg,#e6a55f,#7e3024 55%,#39130e);
    border:1px solid rgba(255,222,157,.52);
    box-shadow:inset 0 5px 9px rgba(255,234,180,.28),inset 0 -8px 12px rgba(19,5,3,.58);
  }
  .qian-tube::after{
    content:"";position:absolute;left:18px;right:18px;bottom:13px;height:11px;border-radius:50%;
    background:rgba(28,8,5,.34);
    box-shadow:0 16px 22px rgba(0,0,0,.25);
  }
  .qian-tube:hover{
    transform:rotateX(5deg) translateY(-4px) scale(1.035);
    box-shadow:
      inset 10px 0 18px rgba(255,214,146,.2),
      inset -14px 0 24px rgba(28,7,4,.5),
      inset 0 -12px 16px rgba(20,5,3,.42),
      0 22px 22px rgba(0,0,0,.25),
      0 42px 70px rgba(0,0,0,.42);
  }
  .qian-tube.shaking{animation:shake .12s linear 8;}
  @keyframes shake{0%{transform:rotate(-7deg)}50%{transform:rotate(7deg)}100%{transform:rotate(0)}}
  .qian-sticks{
    position:absolute;top:-54px;left:50%;transform:translateX(-50%);display:flex;gap:6px;
    filter:drop-shadow(0 9px 8px rgba(0,0,0,.26));
  }
  .qian-sticks i{
    width:10px;height:70px;background:
      linear-gradient(90deg,rgba(255,247,212,.7),transparent 45%,rgba(92,46,14,.28)),
      linear-gradient(180deg,#f3d994,#c89648);
    border:1px solid rgba(113,62,21,.25);
    border-radius:5px 5px 3px 3px;display:block;
    box-shadow:inset -2px 0 3px rgba(82,39,13,.18);
    transform-origin:50% 100%;
  }
  .qian-sticks i:nth-child(1){height:66px;transform:rotate(-9deg);}
  .qian-sticks i:nth-child(2){height:82px;transform:rotate(-3deg);}
  .qian-sticks i:nth-child(3){height:73px;}
  .qian-sticks i:nth-child(4){height:79px;transform:rotate(5deg);}
  .qian-sticks i:nth-child(5){height:64px;transform:rotate(10deg);}
  .qian-tube .label{
    position:relative;z-index:1;
    color:#ffe5a8;font-size:14px;font-weight:700;letter-spacing:0;writing-mode:vertical-lr;
    margin-bottom:22px;padding:13px 7px;border-radius:99px;
    background:linear-gradient(180deg,#a6221b,#741713);
    border:1px solid rgba(255,217,142,.58);
    box-shadow:inset 0 1px 4px rgba(255,231,172,.22),0 6px 12px rgba(0,0,0,.2);
    text-shadow:0 1px 2px rgba(49,9,5,.8);
  }
  .qian-result{
    max-width:500px;width:100%;position:relative;overflow:hidden;
    background:
      linear-gradient(90deg,rgba(151,86,31,.12) 0 1px,transparent 1px 24px),
      radial-gradient(circle at 16% 18%,rgba(255,255,255,.58),transparent 12%),
      linear-gradient(160deg,#fffaf0 0%,#f7ddb3 52%,#eec78c 100%);
    color:#522b14;border-radius:14px;padding:42px 38px 36px;text-align:center;
    box-shadow:
      inset 0 0 0 1px rgba(127,64,20,.2),
      inset 0 0 0 7px rgba(255,250,232,.38),
      0 2px 0 rgba(255,255,255,.5),
      0 18px 24px rgba(0,0,0,.2),
      0 34px 70px rgba(0,0,0,.4);
    opacity:0;transform:translateY(24px) rotateX(9deg) scale(.96);pointer-events:none;
    transition:opacity .7s ease,transform .7s ease;
    border:1px solid rgba(215,151,68,.82);
  }
  .qian-result::before{
    content:"";position:absolute;left:18px;right:18px;top:15px;height:8px;border-radius:99px;
    background:linear-gradient(90deg,transparent,#b92920 16%,#df4b35 50%,#b92920 84%,transparent);
    box-shadow:0 2px 7px rgba(120,27,18,.24);
  }
  .qian-result::after{
    content:"";position:absolute;inset:0;
    background:
      linear-gradient(110deg,transparent 0 42%,rgba(255,255,255,.28) 47%,transparent 55%),
      repeating-linear-gradient(0deg,rgba(95,48,15,.06) 0 1px,transparent 1px 7px);
    opacity:.5;pointer-events:none;
  }
  .qian-result.show{opacity:1;transform:translateY(0) rotateX(0) scale(1);pointer-events:auto;}
  .qian-result .grade{
    display:inline-block;position:relative;z-index:1;
    background:linear-gradient(180deg,#df4334,#981d18);
    color:#fff1c5;font-weight:800;
    padding:6px 24px;border-radius:3px;letter-spacing:0;margin-bottom:18px;
    border:1px solid rgba(255,222,151,.58);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 6px 14px rgba(105,23,15,.26);
  }
  .qian-result .poem{
    position:relative;z-index:1;font-size:18px;line-height:2.2;font-weight:700;
    color:#43200f;text-shadow:0 1px 0 rgba(255,255,255,.62);white-space:pre-line;
  }
  .qian-result .jie{
    position:relative;z-index:1;margin-top:18px;padding-top:16px;
    font-size:14px;line-height:2;color:#6a3719;
    border-top:1px solid rgba(135,70,24,.22);
  }

  /* ---------- 拼豆爱心 ---------- */
  .bead-wrap{display:flex;flex-direction:column;align-items:center;}
  .bead-grid{
    display:grid;
    grid-template-columns:repeat(13,minmax(0,1fr));
    grid-auto-rows:1fr;
    gap:3px;
    width:min(340px,86vw);
    aspect-ratio:13/11;
    align-content:center;
    justify-content:center;
    align-items:center;
    justify-items:center;
  }
  .bead{
    width:100%;
    height:100%;
    max-width:22px;
    max-height:22px;
    border-radius:50%;
    background:rgba(255,255,255,.06);
    transform:scale(0);
    transition:transform .4s cubic-bezier(.34,1.56,.64,1),background .3s,box-shadow .3s,filter .2s;
  }
  .bead.on{transform:scale(1);}
  .bead[data-fill]{
    cursor:pointer;
    -webkit-tap-highlight-color:transparent;
  }
  .bead[data-fill]:hover{
    filter:brightness(1.5) drop-shadow(0 0 6px rgba(255,143,177,.6));
    transform:scale(1.35);
  }
  .bead[data-fill]:active{transform:scale(1.15);}
  .bead-note{
    margin-top:20px;
    font-size:15px;letter-spacing:1.5px;line-height:1.8;
    color:rgba(255,244,247,.55);
    text-align:center;
    animation:note-fade 1.8s ease both;
    animation-delay:2.2s;
  }
  .bead-note .hl{
    font-weight:700;
    color:transparent;
    background:linear-gradient(135deg,var(--pink),var(--purple));
    -webkit-background-clip:text;background-clip:text;
    filter:drop-shadow(0 0 8px rgba(255,94,138,.35));
  }
  @keyframes note-fade{
    from{opacity:0;transform:translateY(8px);}
    to{opacity:1;transform:none;}
  }

  /* ---------- 情书 ---------- */
  .letter-box{
    background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.04));
    border:1px solid var(--line);border-radius:24px;padding:46px 36px;
    backdrop-filter:none;box-shadow:0 22px 70px rgba(0,0,0,.3);
    position:relative;overflow:hidden;
  }
  .letter-box::before{
    content:"❤️";position:absolute;right:-10px;top:-30px;font-size:160px;
    color:rgba(255,94,138,.08);transform:rotate(18deg);
  }
  #letterText{
    font-size:15.5px;line-height:2.4;color:#ffeef3;white-space:pre-wrap;min-height:340px;
  }
  #letterText .caret{
    display:inline-block;width:2px;height:1.1em;background:var(--pink);
    vertical-align:-0.15em;animation:blink .8s steps(1) infinite;
  }
  @keyframes blink{50%{opacity:0;}}
  .btn{
    display:inline-block;border:none;cursor:pointer;font-size:15px;font-weight:700;
    color:#3a1024;background:linear-gradient(120deg,#ffd98e,#ff8fb1);
    padding:13px 38px;border-radius:99px;letter-spacing:.15em;
    box-shadow:0 10px 30px rgba(255,143,177,.35);
    transition:transform .25s,box-shadow .25s;
  }
  .btn:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 16px 40px rgba(255,143,177,.5);}

  footer{
    text-align:center;padding:70px 20px 90px;color:#ffd9e4;opacity:.75;
    font-size:14px;line-height:2.2;position:relative;z-index:1;
  }
  footer .hearts{font-size:22px;}
  
  /* 移动端底部间距优化 */
  @media (max-width:768px){
    footer{
      padding:20px 20px 30px;
      font-size:13px;
    }
  }

  /* 点击爱心粒子 */
  .click-heart{
    position:fixed;z-index:99;pointer-events:none;font-size:18px;
    animation:rise 1.1s ease-out forwards;
  }
  @keyframes rise{
    0%{opacity:1;transform:translate(-50%,-50%) scale(.6);}
    100%{opacity:0;transform:translate(-50%,-160px) scale(1.3);}
  }

  /* 对话气泡 */
  .chat{display:flex;flex-direction:column;gap:14px;max-width:640px;margin:0 auto;}
  .bubble{
    max-width:80%;padding:14px 20px;border-radius:20px;
    font-size:14.5px;line-height:1.9;
    opacity:0;transform:translateY(20px);
    transition:opacity .8s,transform .8s;
  }
  .bubble.show{opacity:1;transform:none;}
  .bubble.me{
    align-self:flex-end;
    background:linear-gradient(120deg,#ff5e8a,#ff8fb1);
    border-bottom-right-radius:4px;color:#fff;
  }
  .bubble.you{
    align-self:flex-start;
    background:rgba(255,255,255,.1);
    border:1px solid var(--line);
    border-bottom-left-radius:4px;
  }
  .bubble small{display:block;font-size:11px;opacity:.65;margin-top:6px;letter-spacing:.1em;}

  /* 恋爱测试题 */
  .quiz{display:flex;flex-direction:column;gap:14px;max-width:680px;margin:0 auto;}
  .q-card{
    background:var(--card);border:1px solid var(--line);border-radius:18px;
    padding:20px 22px;
    opacity:0;transform:translateY(16px);transition:all .5s;
  }
  .q-card.show{opacity:1;transform:none;}
  .q-card h4{font-size:15.5px;margin-bottom:14px;color:#ffe2eb;line-height:1.8;}
  .q-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .q-opt{
    background:rgba(255,255,255,.05);border:1px solid var(--line);
    border-radius:12px;padding:12px 14px;font-size:13.5px;cursor:pointer;
    transition:all .25s;color:var(--ink);font-family:inherit;text-align:left;
  }
  .q-opt:hover{background:rgba(255,143,177,.12);border-color:var(--pink);}
  .q-opt.correct{background:linear-gradient(120deg,#4aa86b,#6ac588);border-color:#6ac588;color:#fff;}
  .q-opt.wrong{background:linear-gradient(120deg,#a84a55,#c56a7a);border-color:#c56a7a;color:#fff;}
  .q-opt[disabled]{cursor:default;}
  .quiz-score{
    text-align:center;margin-top:22px;font-size:15px;color:var(--gold);
    padding:14px;border-radius:14px;background:var(--card);border:1px solid var(--line);
    max-width:680px;margin-left:auto;margin-right:auto;
  }

  /* 心跳 */
  .heartbeat{
    background:var(--card);border:1px solid var(--line);border-radius:24px;
    padding:36px 24px;text-align:center;
    display:flex;flex-direction:column;align-items:center;gap:20px;
  }
  .heart-wrap{
    width:140px;height:140px;
    display:flex;align-items:center;justify-content:center;
    overflow:visible;
  }
  .hb{
    width:110px;height:110px;
    color:var(--pink-deep);
    filter:drop-shadow(0 0 20px var(--pink-deep));
    animation:beat 1s ease-in-out infinite;
  }
  .hb svg{width:100%;height:100%;display:block;}
  @keyframes beat{0%,100%{transform:scale(1)}15%{transform:scale(1.18)}30%{transform:scale(1)}}
  .bpm b{font-size:32px;color:var(--gold);}
  .bpm small{display:block;margin-top:6px;opacity:.65;font-size:13px;}
  #ecg{width:100%;max-width:520px;background:rgba(0,0,0,.25);border-radius:12px;}

  /* 每日一句 */
  .daily{display:flex;flex-direction:column;align-items:center;gap:22px;}
  .daily-card{
    background:linear-gradient(160deg,rgba(255,255,255,.1),rgba(255,255,255,.03));
    border:1px solid var(--line);border-radius:22px;padding:40px 30px;
    max-width:560px;width:100%;text-align:center;
    min-height:240px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px;
    transition:transform .4s;
  }
  .daily-card.flip{transform:rotateY(90deg);}
  .daily-emoji{font-size:44px;}
  #dailyText{font-size:17px;line-height:2.1;color:#ffeef3;}
  #dailyNo{font-size:12px;opacity:.55;letter-spacing:.15em;}

  /* ---------- 未来车票 ---------- */
  .ticket-wrap{
    display:grid;grid-template-columns:520px 200px;gap:0;
    width:720px;margin:0 auto;
    background:
      linear-gradient(135deg,rgba(255,255,255,.15) 0%,rgba(255,255,255,.08) 50%,rgba(255,255,255,.04) 100%),
      radial-gradient(circle at 15% 25%,rgba(255,217,142,.12),transparent 35%);
    border:2px solid rgba(255,255,255,.2);
    border-radius:24px;overflow:hidden;
    box-shadow:
      0 8px 32px rgba(0,0,0,.28),
      0 24px 64px rgba(0,0,0,.35),
      inset 0 1px 0 rgba(255,255,255,.25),
      inset 0 -1px 0 rgba(0,0,0,.15);
    position:relative;
  }
  /* 左右两侧的半圆孔 */
  .ticket-wrap::before,.ticket-wrap::after{
    content:"";position:absolute;top:50%;transform:translateY(-50%);
    width:32px;height:32px;border-radius:50%;
    background:#1d0f33;z-index:2;
    box-shadow:
      0 0 0 2px rgba(255,255,255,.08) inset,
      0 0 16px rgba(0,0,0,.4);
  }
  .ticket-wrap::before{left:-16px;}
  .ticket-wrap::after{right:-16px;}
  
  .future-ticket{position:relative;}
  .future-ticket.flash{animation:ticketFlash .45s ease;}
  @keyframes ticketFlash{
    0%{transform:scale(.98);filter:brightness(.95)}
    50%{transform:scale(1.01);filter:brightness(1.08)}
    100%{transform:none;filter:none}
  }
  
  /* 主票区域 */
  .ticket-main{
    padding:32px 30px 28px;
    position:relative;
    background:linear-gradient(165deg,rgba(255,255,255,.06),transparent 60%);
  }
  /* 顶部装饰线 */
  .ticket-main::before{
    content:"";position:absolute;top:0;left:0;right:0;height:4px;
    background:linear-gradient(90deg,
      transparent,
      var(--pink) 15%,
      var(--gold) 50%,
      var(--purple) 85%,
      transparent
    );
    opacity:.5;
  }
  
  .ticket-topline{
    display:flex;justify-content:space-between;align-items:center;gap:14px;
    margin-bottom:24px;
  }
  .ticket-badge{
    font-size:11px;letter-spacing:.2em;text-transform:uppercase;
    color:#2a1024;background:linear-gradient(135deg,#ffd98e,#ffecb8);
    padding:6px 14px;border-radius:99px;font-weight:800;
    box-shadow:
      0 2px 8px rgba(255,217,142,.3),
      inset 0 1px 0 rgba(255,255,255,.5);
    border:1px solid rgba(255,200,100,.4);
  }
  .ticket-no{
    font-size:11px;opacity:.5;letter-spacing:.15em;
    font-family:'Courier New',monospace;
    color:#ffd9e4;
  }
  
  /* 路线区域 */
  .ticket-route{
    display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;
    margin-bottom:24px;padding:20px 0;
    position:relative;
  }
  .ticket-route::before{
    content:"";position:absolute;bottom:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.12) 20%,rgba(255,255,255,.12) 80%,transparent);
  }
  
  .ticket-col small{
    display:block;font-size:10px;opacity:.45;letter-spacing:.2em;
    text-transform:uppercase;margin-bottom:8px;
    color:#ffd9e4;
  }
  .ticket-col b{
    display:block;font-size:28px;color:#fff;
    line-height:1.2;font-weight:800;
    text-shadow:0 2px 12px rgba(0,0,0,.25);
    white-space:nowrap;
  }
  .ticket-arrow{
    font-size:28px;color:var(--pink);
    filter:drop-shadow(0 0 12px rgba(255,94,138,.55));
    animation:arrowPulse 2s ease-in-out infinite;
  }
  @keyframes arrowPulse{
    0%,100%{transform:translateX(0);opacity:1}
    50%{transform:translateX(4px);opacity:.7}
  }
  
  /* 车票说明 */
  .ticket-note{
    font-size:13.5px;line-height:2.1;color:#ffeef6;opacity:.95;
    padding:18px 20px;border-radius:16px;
    background:
      linear-gradient(135deg,rgba(255,143,177,.08),rgba(182,156,255,.06)),
      rgba(0,0,0,.2);
    border:1px solid rgba(255,255,255,.1);
    box-shadow:inset 0 1px 2px rgba(0,0,0,.15);
    font-style:italic;
  }
  
  /* 元数据区域 */
  .ticket-meta{
    margin-top:20px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
  }
  .ticket-meta div{
    padding:14px 12px;border-radius:12px;
    background:rgba(0,0,0,.25);
    border:1px solid rgba(255,255,255,.08);
    box-shadow:inset 0 1px 3px rgba(0,0,0,.2);
    transition:all .3s ease;
  }
  .ticket-meta div:hover{
    background:rgba(255,143,177,.08);
    border-color:rgba(255,143,177,.25);
  }
  .ticket-meta span{
    display:block;font-size:10px;opacity:.5;letter-spacing:.15em;
    text-transform:uppercase;color:#ffd9e4;
  }
  .ticket-meta strong{
    display:block;margin-top:6px;font-size:13px;
    color:var(--gold);line-height:1.6;font-weight:700;
  }
  
  /* 票根区域 */
  .ticket-stub{
    position:relative;padding:16px 16px;
    border-left:2px dashed rgba(255,255,255,.2);
    background:
      linear-gradient(180deg,rgba(255,143,177,.15) 0%,rgba(182,156,255,.12) 100%),
      repeating-linear-gradient(45deg,transparent,transparent 10px,rgba(255,255,255,.02) 10px,rgba(255,255,255,.02) 20px);
    display:flex;flex-direction:column;justify-content:center;
    align-items:center;gap:10px;text-align:center;
  }
  /* 票根顶部装饰 */
  .ticket-stub::before{
    content:"";position:absolute;top:0;left:0;right:0;height:3px;
    background:linear-gradient(90deg,
      transparent,
      rgba(255,143,177,.5) 30%,
      rgba(182,156,255,.5) 70%,
      transparent
    );
  }
  
  .stub-word{
    font-size:10px;letter-spacing:.4em;text-indent:.4em;
    color:#ffd9e4;opacity:.75;text-transform:uppercase;
    writing-mode:horizontal-tb;
  }
  
  /* 印章样式 */
  .ticket-stamp{
    width:90px;height:90px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    border:3px dashed rgba(255,217,142,.7);
    color:var(--gold);font-weight:800;line-height:1.6;
    transform:rotate(-15deg);
    background:
      radial-gradient(circle at 35% 30%,rgba(255,217,142,.18),transparent 50%),
      rgba(0,0,0,.25);
    padding:12px;font-size:13px;
    box-shadow:
      inset 0 0 0 10px rgba(255,217,142,.06),
      inset 0 2px 8px rgba(0,0,0,.2),
      0 4px 16px rgba(0,0,0,.25);
    text-shadow:0 1px 3px rgba(0,0,0,.3);
  }
  .ticket-stamp.pop{animation:stampPop .6s cubic-bezier(.34,1.56,.64,1);}
  @keyframes stampPop{
    0%{transform:rotate(-15deg) scale(.6);opacity:.2}
    60%{transform:rotate(-12deg) scale(1.08);opacity:1}
    100%{transform:rotate(-15deg) scale(1);opacity:1}
  }
  
  .ticket-btn{
    padding:11px 28px;font-size:13px;width:auto;
    margin:18px auto 0;display:block;
    background:linear-gradient(135deg,#ff8fb1,#ff5e8a);
    border:1px solid rgba(255,255,255,.25);
    box-shadow:
      0 4px 12px rgba(255,94,138,.3),
      inset 0 1px 0 rgba(255,255,255,.3);
  }
  .ticket-btn:hover{
    background:linear-gradient(135deg,#ff9fbb,#ff6e95);
    box-shadow:
      0 6px 18px rgba(255,94,138,.45),
      inset 0 1px 0 rgba(255,255,255,.3);
  }
  
  /* 移动端响应式 */
  @media (max-width:768px){
    .ticket-wrap{
      grid-template-columns:1fr;
      width:min(500px,92vw);
    }
    .ticket-main{padding:18px 16px 14px;}
    .ticket-topline{margin-bottom:14px;}
    .ticket-route{margin-bottom:14px;padding:12px 0;gap:8px;}
    .ticket-col small{margin-bottom:4px;}
    .ticket-col b{
      font-size:clamp(20px,5.5vw,26px);
      white-space:normal;
    }
    .ticket-note{line-height:1.7;padding:12px 14px;font-size:13px;}
    .ticket-meta{
      grid-template-columns:1fr 1fr;
      margin-top:12px;gap:8px;
    }
    .ticket-meta div{padding:10px 8px;}
    .ticket-stub{
      border-left:none;
      border-top:2px dashed rgba(255,255,255,.2);
      padding:16px 16px;
      flex-direction:row;
      justify-content:space-between;
      align-items:center;
      gap:12px;
    }
    .ticket-stub::before{
      width:100%;height:3px;
      background:linear-gradient(90deg,
        transparent,
        rgba(255,143,177,.5) 30%,
        rgba(182,156,255,.5) 70%,
        transparent
      );
    }
    .ticket-wrap::before,.ticket-wrap::after{
      top:auto;left:50%;transform:translateX(-50%);
    }
    .ticket-wrap::before{
      top:-16px;
    }
    .ticket-wrap::after{
      bottom:-16px;top:auto;
    }
    .ticket-stamp{width:70px;height:70px;font-size:10px;padding:6px;}
    .stub-word{font-size:9px;}
    .ticket-btn{font-size:12px;padding:9px 22px;margin-top:14px;}
  }

  /* ---------- 信封情书 ---------- */
  .envelope-stage{
    display:flex;flex-direction:column;align-items:center;gap:26px;
    transition:opacity .6s,transform .6s;
  }
  .envelope-stage.gone{
    opacity:0;transform:translateY(24px) scale(.92);
    pointer-events:none;height:0;overflow:hidden;gap:0;
  }
  .envelope{
    position:relative;width:min(400px,88vw);aspect-ratio:8/5;cursor:pointer;
    filter:drop-shadow(0 24px 50px rgba(0,0,0,.45));
    transition:transform .3s;
  }
  .envelope:hover{transform:translateY(-5px) scale(1.02);}
  .env-back{
    position:absolute;inset:0;border-radius:12px;z-index:0;
    background:linear-gradient(160deg,#e8467c,#b8305c);
  }
  .env-letter-mini{
    position:absolute;left:6%;right:6%;top:7%;bottom:12%;z-index:1;
    background:linear-gradient(170deg,#fffdf8,#ffeef3);border-radius:6px;
    display:flex;align-items:flex-end;justify-content:center;padding-bottom:16px;
    color:#c2516f;font-size:13px;letter-spacing:.14em;
    box-shadow:0 4px 14px rgba(0,0,0,.18);
    transition:transform .9s cubic-bezier(.22,1,.36,1) .45s;
  }
  .envelope.open .env-letter-mini{transform:translateY(-62%);}
  .env-front{
    position:absolute;inset:0;border-radius:12px;z-index:2;
    background:linear-gradient(160deg,#ff6e95,#ff5e8a 55%,#e84a78);
    clip-path:polygon(0 0,50% 54%,100% 0,100% 100%,0 100%);
  }
  .env-front::after{
    content:"❤️ ❤️ ❤️";position:absolute;bottom:12px;left:0;right:0;
    text-align:center;color:rgba(255,255,255,.4);font-size:13px;
  }
  .env-flap{
    position:absolute;left:0;right:0;top:0;height:56%;z-index:3;
    background:linear-gradient(200deg,#ff8fb1,#ff6e95);
    clip-path:polygon(0 0,100% 0,50% 100%);
    border-radius:12px 12px 0 0;
    transform-origin:top center;
    transition:transform .7s cubic-bezier(.4,0,.2,1),z-index 0s .4s;
  }
  .envelope.open .env-flap{transform:rotateX(180deg);z-index:0;}
  .env-seal{
    position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;
    width:54px;height:54px;border-radius:50%;
    background:radial-gradient(circle at 35% 30%,#ffd98e,#e8a13c);
    display:flex;align-items:center;justify-content:center;
    color:#a33b5b;font-size:22px;
    box-shadow:0 4px 14px rgba(0,0,0,.3),inset 0 0 0 4px rgba(255,255,255,.25);
    transition:transform .45s,opacity .45s;
    animation:sealGlow 2.4s ease-in-out infinite;
  }
  @keyframes sealGlow{
    0%,100%{box-shadow:0 4px 14px rgba(0,0,0,.3),inset 0 0 0 4px rgba(255,255,255,.25),0 0 0 0 rgba(255,217,142,.4);}
    50%{box-shadow:0 4px 14px rgba(0,0,0,.3),inset 0 0 0 4px rgba(255,255,255,.25),0 0 0 14px rgba(255,217,142,0);}
  }
  .envelope.open .env-seal{transform:translate(-50%,-50%) scale(0) rotate(120deg);opacity:0;}
  .env-hint{font-size:13px;opacity:.65;animation:bob2 2s ease-in-out infinite;}
  @keyframes bob2{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
  .letter-box.reveal{display:block;animation:letterIn .9s ease both;}
  @keyframes letterIn{
    from{opacity:0;transform:translateY(46px) scale(.95);}
    to{opacity:1;transform:none;}
  }

  /* ---------- 顶部进度条 ---------- */
  #progress{
    position:fixed;top:0;left:0;height:3px;width:0;z-index:90;
    background:linear-gradient(90deg,#ffd98e,#ff8fb1,#ff5e8a);
    box-shadow:0 0 10px rgba(255,94,138,.6);
    transition:width .15s ease-out;
  }

  /* ---------- 右侧章节导航 ---------- */
  #sideNav{
    position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:80;
    display:flex;flex-direction:column;gap:7px;
    transition:opacity .5s ease;
  }
  #sideNav.faded{opacity:.22;}
  #sideNav:hover{opacity:1;}
  .nav-item{
    display:flex;align-items:center;justify-content:flex-end;gap:9px;
    cursor:pointer;padding:1px 0;
  }
  .nav-dot{
    width:8px;height:8px;border-radius:50%;flex-shrink:0;
    background:rgba(255,255,255,.28);
    transition:all .3s;
    display:flex;
  }
  .nav-item:hover .nav-dot{background:rgba(255,143,177,.7);}
  .nav-item.active .nav-dot{
    background:var(--pink);transform:scale(1.45);
    box-shadow:0 0 10px var(--pink);
  }
  .nav-label{
    font-size:12px;color:#ffd9e4;white-space:nowrap;
    background:rgba(28,14,44,.88);border:1px solid var(--line);
    padding:3px 11px;border-radius:99px;
    opacity:0;transform:translateX(8px);transition:all .25s;
    pointer-events:none;backdrop-filter:blur(6px);
  }
  #sideNav:hover .nav-label{opacity:1;transform:none;}
  .nav-item.active .nav-label{opacity:1;transform:none;color:var(--gold);border-color:rgba(255,217,142,.5);}
  #sideNav.faded .nav-item.active .nav-label{opacity:0;}
  #sideNav:hover .nav-item.active .nav-label{opacity:1;}

  @media (max-width:768px){
    /* 移动端导航：默认隐藏，点击右下角爱心后从右滑入 */
    #sideNav{
      top:50%;right:0;left:auto;bottom:auto;
      transform:translateY(-50%) translateX(calc(100% + 54px));
      width:auto;max-width:none;max-height:none;
      backdrop-filter:blur(14px);
      background:none;border:none;border-radius:0;
      padding:6px 2px;gap:0;
      flex-direction:column;
      overflow:visible;
      box-shadow:none;
      opacity:1;pointer-events:none;
      transition:transform .4s cubic-bezier(.22,1,.36,1),opacity .3s;
    }
    #sideNav.mobile-show{
      transform:translateY(-50%) translateX(0);
      pointer-events:auto;
    }
    #sideNav.faded{opacity:.35;}

    /* 爱心浮动按钮 */
    #navHeart{
      display:flex;position:fixed;bottom:18px;right:14px;z-index:90;
      width:46px;height:46px;border-radius:50%;
      background:linear-gradient(135deg,#ff5e8a,#ff8fb1);
      border:none;cursor:pointer;
      align-items:center;justify-content:center;
      font-size:20px;
      box-shadow:0 6px 22px rgba(255,94,138,.5),0 2px 8px rgba(0,0,0,.3);
      transition:transform .3s,box-shadow .3s;
      animation:heartBeat 2s ease-in-out infinite;
      color:#fff;
    }
    #navHeart:hover{transform:scale(1.1);box-shadow:0 10px 28px rgba(255,94,138,.65);}
    #navHeart.on{
      animation:none;
      transform:scale(1.15);
      box-shadow:0 8px 24px rgba(255,94,138,.6);
    }
    @keyframes heartBeat{
      0%,100%{transform:scale(1)}
      4%{transform:scale(1.18)}
      8%{transform:scale(1)}
      12%{transform:scale(1.12)}
      16%{transform:scale(1)}
    }

    .nav-item{
      flex-direction:row;justify-content:flex-end;align-items:center;
      gap:8px;padding:5px 4px;
      position:relative;
    }
    .nav-dot{
      width:7px;height:7px;
      background:rgba(255,235,242,.32);
    }
    .nav-item.active .nav-dot{
      background:var(--pink);transform:scale(1.8);
      box-shadow:0 0 12px var(--pink);
    }
    /* 标签：纯文字无蒙版，当前章节金色文字，hover 时全亮 */
    .nav-label{
      opacity:0;transform:translateX(6px);
      font-size:12px;padding:0;
      background:none;border:none;border-radius:0;
      color:var(--gold);letter-spacing:.06em;
      backdrop-filter:none;
      transition:opacity .3s,transform .3s;
      pointer-events:none;white-space:nowrap;
      text-shadow:0 2px 8px rgba(0,0,0,.6);
    }
    .nav-item.active .nav-label{opacity:1;transform:none;}
    /* 导航展开时，当前项 + hover 所有项都显示标签 */
    #sideNav.mobile-show .nav-item .nav-label{opacity:.7;}
    #sideNav.mobile-show .nav-item:hover .nav-label{opacity:1;}
    #sideNav.mobile-show .nav-item.active .nav-label{opacity:1;}
    #sideNav.faded .nav-label{opacity:0 !important;}
  }

  @media (max-width:560px){
    .mem-emoji{margin-left:0;}
    section{padding:45px 16px;}
    .bubble{max-width:88%;}
    .q-options{grid-template-columns:1fr;}
    .timer{gap:10px;}
    .timer .cell{min-width:68px;padding:10px 12px;}
    .timer .cell b{font-size:21px;}
    .prelude{padding:30px 20px;font-size:14.5px;}
    .mem-card{padding:20px 18px;}
    .mem-title{font-size:17px;}
    .mem-text{font-size:14px;}
    #letterText{min-height:240px;font-size:14px;}
    .daily-card{padding:30px 20px;min-height:200px;}
    .heartbeat{padding:28px 16px;}
    .heart-wrap{width:110px;height:110px;}
    .hb{width:86px;height:86px;}
    .qian-result{padding:26px 20px;}
    .qian-area{margin-top:60px;}
    /* 信封移动端 */
    .env-seal{width:44px;height:44px;font-size:18px;}
    .env-hint{font-size:12px;text-align:center;}
    /* 车票V2移动端 */
    .ticket-main{padding:18px 16px 14px;}
    .ticket-route{gap:8px;}
    .ticket-arrow{transform:rotate(90deg);font-size:20px;}
    .ticket-col b{font-size:clamp(20px,5.5vw,26px);}
    .ticket-note{padding:12px 14px;font-size:13px;line-height:1.7;}
    .ticket-btn{font-size:12px;padding:9px 22px;margin-top:14px;}
  }

/* ---------- 背景音乐按钮 ---------- */
.bgm-btn{
  position:fixed;bottom:24px;right:24px;z-index:999;
  width:48px;height:48px;border:2px solid var(--pink-deep);
  border-radius:50%;background:rgba(16,8,31,.85);
  backdrop-filter:blur(8px);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s,box-shadow .3s;
  box-shadow:0 4px 16px rgba(255,94,138,.2);
  -webkit-tap-highlight-color:transparent;
}
.bgm-btn:hover{transform:scale(1.1);box-shadow:0 4px 24px rgba(255,94,138,.4);}
.bgm-icon{font-size:20px;color:var(--pink-deep);transition:color .3s;}
.bgm-btn.playing{border-color:var(--gold);animation:bgm-pulse 2s ease-in-out infinite;}
.bgm-btn.playing .bgm-icon{color:var(--gold);}
@keyframes bgm-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(255,217,142,.35);}
  50%{box-shadow:0 0 0 10px rgba(255,217,142,0);}
}
@media(max-width:768px){
  .bgm-btn{
    bottom:74px;right:14px;
    width:42px;height:42px;
    box-shadow:0 3px 12px rgba(255,94,138,.2);
  }
  .bgm-btn.playing{animation-duration:1.8s;}
  .bgm-icon{font-size:18px;}
}