/* ============================================================
   逝燃 SHIRAN · 燃时拾句  —  Apple-inspired 精装视觉系统 v2
   设计语言：超大留白 / 系统字体 / 克制缎面金 / 环境光晕 / 收藏卡质感 / 细腻缓动
   ⚠️ 仅重做视觉，所有 class 名与交互逻辑（app.js）保持不变。
   ============================================================ */

:root{
  /* 锁定浅色：抵抗浏览器「强制夜间模式 / 网页护眼」的反色处理。
     若不声明，手机夜间模式下白底会被反成黑色、白色蜡烛会被反成黑色。 */
  color-scheme:light only;
  /* 纸面与背景 */
  --bg:        #FAF8F4;
  --bg-2:      #FFFFFF;
  --paper:     #FFFFFF;
  --paper-2:   #FCFAF6;

  /* 文字 */
  --ink:       #181410;
  --ink-2:     #5C5349;
  --ink-3:     #93897A;

  /* 线条（低对比，靠光影而非描边） */
  --line:      rgba(24,20,16,.09);
  --line-2:    rgba(24,20,16,.05);

  /* 缎面金主色（克制、高级） */
  --gold:      #9A6F2E;
  --gold-2:    #C9A45C;
  --gold-wash: linear-gradient(135deg,#FBF1DC,#F4DEB0);

  /* 火焰渐变（柔和金调） */
  --flame1:    #E7B45F;
  --flame2:    #D89149;
  --flame3:    #BE6E33;

  /* 等级氛围色：炽 / 温 / 寂 */
  --lvl-chi:   #B07D3A;
  --lvl-wen:   #6F8A78;
  --lvl-ji:    #6A7C9A;

  /* 字体：整体统一为宋体（2026-10-14 客户要求）。
     ShiranSong = 站内自托管的 Noto Serif SC 子集（见 fonts-ui.css / fonts-reveal.css）。
     自托管是为了「所有手机看起来一致」：安卓多数没有中文衬线体，只写 serif 会被回退成黑体。 */
  --serif: "ShiranSong","Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --sans:  "ShiranSong","Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",serif;

  --radius:    26px;
  --radius-sm: 16px;
  --shadow:    0 28px 64px -34px rgba(40,28,16,.32);
  --shadow-sm: 0 12px 32px -20px rgba(40,28,16,.22);
  --ease:      cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:
    radial-gradient(1100px 560px at 50% -12%, #FDF3E2 0%, rgba(253,243,226,0) 62%),
    var(--bg);
  min-height:100dvh;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block}
a{color:inherit}

/* ---------- 顶部导航（极简毛玻璃） ---------- */
.nav{
  position:sticky;top:0;z-index:20;
  background:rgba(250,248,244,.66);
  backdrop-filter:saturate(180%) blur(22px);
  -webkit-backdrop-filter:saturate(180%) blur(22px);
  border-bottom:1px solid var(--line);
}
.nav-in{
  max-width:660px;margin:0 auto;padding:13px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.nav-brand{font-family:var(--sans);font-size:16px;letter-spacing:.18em;color:var(--ink);font-weight:600}
.nav-brand span{font-size:9.5px;letter-spacing:.34em;color:var(--ink-3);margin-left:9px;font-weight:500;vertical-align:middle}
.nav-tag{font-size:11px;letter-spacing:.18em;color:var(--ink-3);margin-left:auto}
/* 官网入口（右侧常驻，窄屏与声音开关并存不冲突） */
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;flex:none}
.nav-right .nav-tag{margin-left:0}
.nav-site{
  font-size:11px;letter-spacing:.18em;color:var(--gold);text-decoration:none;
  border-bottom:1px solid rgba(154,111,46,.4);padding-bottom:1px;white-space:nowrap;
}
.nav-site:hover{color:#9A6F2E}

.wrap{max-width:600px;margin:0 auto;padding:0 24px 80px}

/* ---------- HERO（大气留白 + 环境光晕） ---------- */
.hero{position:relative;text-align:center;padding:84px 0 56px;overflow:hidden}
.hero-glow{
  position:absolute;top:-150px;left:50%;transform:translateX(-50%);
  width:560px;height:560px;border-radius:50%;z-index:0;pointer-events:none;
  background:radial-gradient(circle, rgba(231,180,95,.26), rgba(231,180,95,0) 62%);
  filter:blur(14px);
}
.hero > *{position:relative;z-index:1}
.hero > .hero-glow{position:absolute;z-index:0}
.brand{
  font-family:var(--sans);font-weight:600;letter-spacing:.5em;text-indent:.5em;
  font-size:13px;color:var(--gold);margin-bottom:30px;
}
.candle{width:132px;height:auto;margin:0 auto 36px;overflow:visible}

/* ---------- 蜡烛状态机：熄灭（默认）→ 点火 → 燃烧 ---------- */
/* 熄灭态：无火无光，灯芯一缕青烟 */
.candle .flame-g{
  opacity:0;transform:scale(.1);
  transform-origin:60px 46px;
  transition:opacity .4s ease;
}
.candle .halo{
  opacity:0;transform:scale(.55);
  transform-origin:60px 38px;
  transition:opacity 1.6s ease,transform 1.6s ease;
}
.candle .smoke{
  opacity:.55;transform-origin:60px 42px;
  animation:smoke 3.6s ease-in-out infinite;
  transition:opacity .7s ease;
}
@keyframes smoke{
  0%,100%{opacity:.35;transform:translateY(0) scaleX(1)}
  50%{opacity:.7;transform:translateY(-2.5px) scaleX(.92)}
}
/* 点火瞬间：火苗自灯芯窜起 */
.candle.igniting .flame-g{
  opacity:1;
  animation:ignite 1s var(--ease) both,sway 3.4s ease-in-out 1s infinite;
}
.candle.igniting .halo{
  opacity:1;transform:scale(1);
  transition:opacity 1.2s ease .35s,transform 1.2s var(--ease) .35s;
}
.candle.igniting .smoke{opacity:0;animation:none}
@keyframes ignite{
  0%{opacity:0;transform:scale(.1) translateY(4px)}
  55%{opacity:1;transform:scale(1.3) translateY(-1px)}
  75%{transform:scale(.88)}
  100%{opacity:1;transform:scale(1)}
}
/* 稳定燃烧态：火苗摇曳 + 光晕呼吸 */
.candle.lit .flame-g{
  opacity:1;transform:scale(1);
  animation:sway 3.4s ease-in-out infinite;
}
.candle.lit .halo{
  opacity:1;transform:scale(1);
  animation:breathe 4.6s ease-in-out infinite;
}
.candle.lit .smoke{opacity:0;animation:none}
@keyframes sway{
  0%,100%{transform:rotate(-2.4deg)}
  50%{transform:rotate(2.4deg) scaleY(1.05)}
}
@keyframes breathe{
  0%,100%{opacity:.7;transform:scale(1)}
  50%{opacity:1;transform:scale(1.07)}
}
/* 点燃后环境光晕变亮（配合 body.lit） */
.hero-glow{opacity:.4;transition:opacity 1.6s ease}
body.lit .hero-glow{opacity:1}
h1{
  font-family:var(--sans);font-weight:600;
  font-size:clamp(28px,7.2vw,48px);line-height:1.3;letter-spacing:-.01em;
  color:var(--ink);
}
.lede{font-size:15px;color:var(--ink-2);margin:24px auto 0;max-width:410px;letter-spacing:.01em;line-height:1.95;text-wrap:balance}
/* 手机端不强制断行：让两句话自然流动，避免前半句末尾出现孤字 */
br.m{display:none}

/* ---------- 三步引导（整卡 + 分隔线，整齐划一） ---------- */
.steps{
  list-style:none;max-width:400px;margin:30px auto 50px;
  background:rgba(255,255,255,.62);
  border:1px solid var(--line-2);border-radius:20px;
  padding:6px 20px;backdrop-filter:blur(8px);
}
.steps li{
  display:flex;align-items:center;gap:13px;
  font-size:13px;color:var(--ink-2);letter-spacing:.02em;
  width:100%;text-align:left;line-height:1.6;padding:13px 0;
}
.steps li + li{border-top:1px solid var(--line-2)}
.steps .t{flex:1;min-width:0;text-wrap:balance}
.steps .n{
  display:inline-flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:50%;flex:none;
  background:linear-gradient(140deg,var(--flame1),var(--flame3));
  color:#fff;font-size:11.5px;font-weight:600;
  box-shadow:0 4px 10px -4px rgba(190,110,51,.5);
}
.steps b{color:var(--gold);letter-spacing:.06em;font-weight:600;white-space:nowrap}

/* ---------- 输码 ---------- */
.search{margin:0 auto;max-width:480px}
.cta{
  margin:0 0 18px;text-align:center;font-size:13px;color:var(--ink-2);
  letter-spacing:.12em;font-weight:500;
}
.search-box{
  display:flex;align-items:stretch;
  background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:999px;
  overflow:hidden;
  box-shadow:0 18px 42px -24px rgba(40,28,16,.28), inset 0 0 0 1px rgba(255,255,255,.5);
  backdrop-filter:blur(18px);
  transition:border-color .35s var(--ease),box-shadow .35s var(--ease),transform .35s var(--ease);
}
.search-box:focus-within{
  border-color:var(--gold-2);
  box-shadow:0 0 0 5px rgba(201,164,92,.15),0 20px 44px -22px rgba(154,111,46,.42);
}
#code{
  flex:1;min-width:0;border:0;outline:0;background:transparent;
  padding:20px 8px 20px 30px;font-size:20px;letter-spacing:.18em;
  font-family:var(--sans);color:var(--ink);text-transform:uppercase;font-weight:500;
}
#code::placeholder{color:#C8BDAE;letter-spacing:.04em;text-transform:none;font-size:15px;font-weight:400}
.btn{
  border:0;cursor:pointer;font-family:var(--sans);
  font-size:15px;letter-spacing:.26em;text-indent:.26em;font-weight:600;
  padding:0 32px;color:#fff;white-space:nowrap;flex:none;
  background:linear-gradient(135deg,var(--flame1),var(--flame2) 58%,var(--flame3));
  transition:filter .22s var(--ease),transform .12s var(--ease),box-shadow .22s var(--ease);
  box-shadow:0 12px 26px -12px rgba(190,110,51,.7);
}
.btn:hover{filter:brightness(1.06);box-shadow:0 16px 30px -12px rgba(190,110,51,.75)}
.btn:active{transform:translateY(1px)}
.btn:disabled{filter:grayscale(.35) brightness(.97);cursor:default;box-shadow:none}
.hint{margin-top:18px;font-size:12px;color:var(--ink-3);letter-spacing:.02em;text-align:center;line-height:1.7;text-wrap:balance}
.hint b{color:var(--ink-2);font-weight:600;letter-spacing:.1em}
.msg{text-align:center;font-size:13px;color:var(--flame3);margin-top:16px;min-height:20px;letter-spacing:.03em}
.msg.ok{color:var(--lvl-wen)}

/* ---------- 结果卡（解语 / 长信 · 收藏卡质感） ---------- */
.result{margin:38px auto 0;max-width:560px}
.result[hidden]{display:none}
.slip,.letter{
  position:relative;
  background:linear-gradient(180deg,#FFFFFF,#FCFAF6);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:46px 34px 36px;
  box-shadow:var(--shadow);overflow:hidden;
}
.slip::before,.letter::before{
  content:"";position:absolute;inset:11px;
  border:1px solid var(--line-2);border-radius:calc(var(--radius) - 11px);
  pointer-events:none;
}
.mood{position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(180deg,var(--lvl-chi),rgba(176,125,58,.2))}

.slip-head,.letter-head{
  display:flex;align-items:flex-start;justify-content:space-between;
  gap:12px;flex-wrap:wrap;margin-bottom:26px;
}
.code-badge{font-family:var(--serif);font-size:27px;letter-spacing:.12em;color:var(--ink);font-weight:500}
.code-badge span{
  font-size:11px;letter-spacing:.18em;color:var(--ink-3);display:block;
  margin-top:6px;font-family:var(--sans);font-weight:400;
}
.from{
  font-size:11.5px;letter-spacing:.1em;color:var(--ink-2);
  border:1px solid var(--line);border-radius:999px;padding:7px 14px;white-space:nowrap;
  background:rgba(255,255,255,.7);
}

/* 解语大字：居中、仪式感（balance 保证在标点/短语处断行） */
.text{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(28px,7vw,38px);line-height:1.5;letter-spacing:.06em;
  color:var(--ink);margin:10px 0 30px;text-align:center;text-wrap:balance;
}
.block{margin:18px 0;text-align:left}
.label{
  font-size:11px;letter-spacing:.24em;color:var(--gold);margin-bottom:8px;
  font-weight:600;text-transform:uppercase;
}
/* 暖心语录：放大加粗、收紧字距，作为醒目段落标题（中文无大小写，"大写突出"即放大强化） */
.label-strong{
  font-size:16px;letter-spacing:.14em;color:var(--gold);margin-bottom:10px;
  font-weight:700;text-transform:none;
}
@media (max-width:480px){
  .label-strong{font-size:15px}
}
.plain{font-size:15.5px;color:var(--ink-2);line-height:2.02;letter-spacing:.012em}
/* 大白话分段：数据用 \n 分句，页面上按段留白，避免长文案挤成一堵字墙 */
.plain p{margin:0}
.plain p+p{margin-top:15px}

/* 窄屏收紧卡片内边距，给文案更多横向空间；码与胶囊缩一号保证同排不拆行 */
@media (max-width:480px){
  .slip,.letter{padding:38px 24px 30px}
  .code-badge{font-size:21px}
  .from{font-size:10.5px;padding:5px 11px}
  .plain{font-size:15px;line-height:1.98}
  .plain p+p{margin-top:14px}
}
.art{font-family:var(--serif);font-size:17px;color:var(--ink);line-height:2;letter-spacing:.03em}
.en-block{margin-top:20px;padding-top:18px;border-top:1px solid var(--line-2)}
.en{font-size:13.5px;color:var(--ink-3);line-height:1.85;font-style:italic}
.disclaimer{font-size:11.5px;color:var(--ink-3);margin-top:28px;line-height:1.75;opacity:.9}

/* 操作按钮（ghost） */
.actions{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.ghost{
  flex:1;min-width:92px;border:1px solid var(--line);background:rgba(255,255,255,.7);
  cursor:pointer;border-radius:999px;padding:13px 12px;font-size:13px;
  color:var(--ink-2);font-family:var(--sans);letter-spacing:.06em;
  white-space:nowrap;   /* 防止窄屏把「保存为图片」拆成两行（2026-10-19） */
  transition:.22s var(--ease);
}
.ghost:hover{border-color:var(--gold-2);color:var(--ink);background:#fff;box-shadow:var(--shadow-sm)}
/* 键盘导航可见焦点框（缺陷 2026-1015-12）：hover 有、focus 无会让键盘/读屏用户看不到当前位置 */
.ghost:focus-visible{outline:2px solid var(--gold-2);outline-offset:2px}

/* ---------- 长信（宠物友好系列 · 信笺版式） ---------- */
.letter-short{
  font-family:var(--serif);font-weight:500;text-align:center;
  font-size:clamp(24px,5.6vw,31px);line-height:1.55;letter-spacing:.05em;
  color:var(--ink);margin:10px 0 26px;text-wrap:balance;
}
.letter-body{
  font-size:15px;color:var(--ink-2);line-height:2.1;white-space:pre-line;
  letter-spacing:.02em;padding-top:22px;border-top:1px solid var(--line-2);text-align:left;
}
.letter-sign{
  text-align:right;font-family:var(--serif);font-size:15px;color:var(--ink-2);
  margin-top:22px;letter-spacing:.04em;
}

/* ---------- 已认领提示 ---------- */
.own-note{
  margin-top:24px;padding:13px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.7);font-size:12px;color:var(--ink-2);
  letter-spacing:.03em;text-align:center;line-height:1.75;text-wrap:balance;
}

/* ---------- 限定款中奖横幅（金箔质感） ---------- */
.prize-banner{
  display:flex;align-items:center;gap:11px;margin:0 0 26px;
  padding:15px 17px;border:1px solid rgba(154,111,46,.32);border-radius:var(--radius-sm);
  background:linear-gradient(135deg,#FBF0D2,#F3DDA0);
  font-size:12.5px;color:#7A5A1E;letter-spacing:.02em;line-height:1.6;
  box-shadow:0 16px 36px -22px rgba(154,111,46,.55);
}
.prize-banner .pb-ico{font-size:19px;flex:none;filter:drop-shadow(0 2px 4px rgba(122,90,30,.3))}
.prize-banner .pb-txt{flex:1;line-height:1.6}
.prize-banner .pb-link{
  color:#7A5A1E;text-decoration:none;font-weight:600;
  border-bottom:1px solid rgba(122,90,30,.45);padding-bottom:1px;margin-left:4px;white-space:nowrap;
}
.prize-banner[hidden]{display:none}

/* ---------- 找回（换设备 / 清缓存） ---------- */
.recall{
  margin:38px auto 0;max-width:560px;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px 28px;box-shadow:var(--shadow);
}
.recall[hidden]{display:none}
.recall-h{font-family:var(--serif);font-weight:500;font-size:22px;letter-spacing:.05em;color:var(--ink);margin-bottom:14px}
.recall-p{font-size:13px;color:var(--ink-2);line-height:1.9;margin-bottom:22px}
.recall-step{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-top:1px solid var(--line-2)}
.recall-step .n{
  display:inline-flex;align-items:center;justify-content:center;
  width:23px;height:23px;border-radius:50%;flex:none;margin-top:2px;
  background:linear-gradient(140deg,var(--flame1),var(--flame3));color:#fff;font-size:12px;font-weight:600;
  box-shadow:0 4px 10px -4px rgba(190,110,51,.5);
}
.rs-body{flex:1;min-width:0}
.rs-t{font-size:13px;color:var(--ink-2);letter-spacing:.03em;margin-bottom:11px}
.rs-t strong{color:var(--ink);font-weight:600}
.recall .ghost{flex:none;min-width:auto;padding:11px 18px;font-size:13px}
.alias-out{margin-top:11px;font-family:var(--serif);font-size:28px;letter-spacing:.18em;color:var(--gold);text-indent:.18em;font-weight:500}
.alias-out small{display:block;font-family:var(--sans);font-size:11.5px;letter-spacing:.04em;color:var(--ink-3);text-indent:0;margin-top:5px}
.recall-inline{display:flex;gap:10px;align-items:stretch}
.recall-inline input{
  flex:1;min-width:0;border:1px solid var(--line);border-radius:999px;background:#fff;
  padding:12px 18px;font-size:15px;letter-spacing:.14em;color:var(--ink);
  font-family:var(--sans);text-transform:uppercase;outline:0;transition:.22s var(--ease);
}
.recall-inline input:focus{border-color:var(--gold-2);box-shadow:0 0 0 5px rgba(201,164,92,.15)}
.recall-inline input::placeholder{letter-spacing:.04em;color:#C8BDAE;text-transform:none;font-size:14px}
.recall-inline .btn{border-radius:999px;padding:0 22px;font-size:13.5px}
.recall .msg{text-align:left;margin-top:12px}
.recall-foot{margin-top:16px;font-size:11.5px;color:var(--ink-3);line-height:1.75}

/* ---------- 页脚 ---------- */
.foot{text-align:center;margin-top:60px;color:var(--ink-3);font-size:12px;letter-spacing:.06em}
.foot .muted{margin-top:7px;opacity:.85}
.foot a{color:var(--gold);text-decoration:none;border-bottom:1px solid rgba(154,111,46,.4);padding-bottom:1px}

/* ---------- 保存图片模态层 ---------- */
.share-mask{position:fixed;inset:0;background:rgba(24,20,16,.5);display:flex;align-items:flex-end;justify-content:center;z-index:50;padding:0;backdrop-filter:blur(4px)}
.share-mask[hidden]{display:none}
.share-sheet{
  background:var(--paper);width:100%;max-width:520px;border-radius:28px 28px 0 0;
  padding:22px 22px calc(22px + env(safe-area-inset-bottom));text-align:center;
  animation:rise .42s var(--ease) both;
}
.share-tip{font-size:13px;color:var(--ink-2);margin-bottom:14px;letter-spacing:.04em}
.share-img{width:100%;border-radius:16px;display:block;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.share-bar{display:flex;gap:10px;margin-top:16px}
.share-bar .ghost{flex:1;text-decoration:none;text-align:center}

/* ---------- 动画 ---------- */
@media (prefers-reduced-motion:no-preference){
  .result,.recall{animation:rise .6s var(--ease) both}
  .hero{animation:fade-up 1s var(--ease) both}
  .steps{animation:fade-up 1.1s var(--ease) .08s both}
  .search{animation:fade-up 1.2s var(--ease) .16s both}
  @keyframes rise{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
  @keyframes fade-up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
}

/* ---------- 桌面端 ---------- */
@media (min-width:560px){
  .share-mask{align-items:center}
  .share-sheet{border-radius:28px;max-width:430px}
  .hero{padding:120px 0 64px}
}

/* ---------- 移动端（≤431px） ---------- */
@media (max-width:431px){
  #code{padding:16px 4px 16px 20px;font-size:17px;letter-spacing:.12em}
  .btn{padding:0 18px;font-size:14px;letter-spacing:.12em;text-indent:.12em}
  .steps{padding:4px 15px}
  .steps li{gap:10px;font-size:12.5px;line-height:1.7;padding:15px 0;min-height:56px}
  .steps .n{width:22px;height:22px;font-size:11px}
  .steps .t{line-height:1.7}
  /* 导语在窄屏放开宽度，减少因折行产生的孤字 */
  .lede{max-width:none;font-size:14.5px;line-height:1.9}
}

/* ---------- 点火 flash 仪式感（胶片曝光感：柔和的两段呼吸，不再频闪刺眼） ---------- */
.flash-layer{position:fixed;inset:0;z-index:999;pointer-events:none}
.fl-dark,.fl-bright{position:absolute;inset:0;opacity:0}
.fl-dark{background:radial-gradient(ellipse at 50% 52%,rgba(38,26,14,.34),rgba(24,16,8,.5) 78%)}
.fl-bright{
  background:radial-gradient(circle at 50% 42%,rgba(255,232,186,.85),rgba(243,201,120,.42) 36%,rgba(255,255,255,0) 72%);
  mix-blend-mode:screen;
}
.flash-layer.firing .fl-dark{animation:fl-dark 1.35s ease-in-out both}
.flash-layer.firing .fl-bright{animation:fl-bright 1.35s ease-in-out both}
/* 拆蜡封时的轻量版（不打断阅读） */
.flash-layer.firing.soft .fl-dark{animation:fl-dark-soft .9s ease-in-out both}
.flash-layer.firing.soft .fl-bright{animation:fl-bright-soft .9s ease-in-out both}
@keyframes fl-bright{
  0%{opacity:0;transform:scale(.78)}
  30%{opacity:.62}
  62%{opacity:.14;transform:scale(1.06)}
  100%{opacity:0;transform:scale(1.18)}
}
@keyframes fl-dark{
  0%{opacity:0}
  30%{opacity:.34}
  62%{opacity:.12}
  100%{opacity:0}
}
@keyframes fl-bright-soft{0%{opacity:0}34%{opacity:.34}100%{opacity:0}}
@keyframes fl-dark-soft{0%{opacity:0}34%{opacity:.18}100%{opacity:0}}
@media (prefers-reduced-motion:reduce){ .flash-layer{display:none} }

/* ---------- 燃烧白噪音开关（收在顶部导航右侧） ----------
   原先固定在右下角悬浮，滚动时会压住「再解一支」按钮、英文段与免责声明
   （实测 390/375 宽机型最大遮挡 2269px²），故移入 sticky 导航，永不吃内容。 */
.sound-toggle{
  flex:none;display:inline-flex;align-items:center;
  min-height:30px;                                  /* 保证触控面积，不被导航压成细条 */
  border:1px solid var(--line-2);border-radius:999px;
  background:rgba(255,255,255,.5);
  color:var(--ink-3);font-family:var(--sans);
  font-size:11px;letter-spacing:.14em;line-height:1;
  padding:0 13px;cursor:pointer;white-space:nowrap;
  transition:color .25s var(--ease),border-color .25s var(--ease),
             background .25s var(--ease),transform .12s var(--ease);
}
.sound-toggle[hidden]{display:none}
.sound-toggle:active{transform:scale(.96)}
.sound-toggle:hover{color:var(--ink-2)}
.sound-toggle[aria-pressed="true"]{color:var(--gold);border-color:rgba(154,111,46,.45);background:rgba(168,126,52,.07)}
@media (max-width:431px){
  .nav-tag{display:none}                                  /* 窄屏让位给声音开关，避免导航拥挤 */
  .sound-toggle{font-size:10.5px;letter-spacing:.08em;padding:0 12px;min-height:29px}
}

/* ---------- 开场仪式（内部燃烧 -> 浮现 logo -> 轻触进入） ---------- */
body.locked{overflow:hidden}
.intro{
  position:fixed;inset:0;z-index:2000;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:26px;cursor:pointer;
  background:radial-gradient(circle at 50% 42%,#FFFDF8,#F6EFE3 55%,#EEE5D3);
  transition:opacity 1.9s var(--ease);   /* 与 JS 1900ms 隐藏时机对齐，火焰燃尽后才消失 */
}
.intro[hidden]{display:none}
.intro.leaving{opacity:0;pointer-events:none}
.intro-burn{position:absolute;inset:0;pointer-events:none}
/* 开场视频：竖屏素材。
   手机：object-fit:cover 铺满不留边；
   桌面：整幅完整显示（contain），两侧用「视频同色柔光背景」填充，避免出现异色块 */
.intro-video{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:1;animation:video-in .9s var(--ease) .1s backwards;
  transition:opacity .7s var(--ease),transform .9s var(--ease);
}
/* 视频播完 → 先淡出消失（用 forwards 会锁住透明度导致无法淡出，故用 backwards） */
.intro.video-done .intro-video{opacity:0;transform:scale(1.05)}
@keyframes video-in{from{opacity:0;transform:scale(.985)}to{opacity:1;transform:none}}
.intro::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse 60% 45% at 50% 42%, rgba(255,231,190,.55), rgba(255,231,190,0) 70%),
    linear-gradient(180deg,#FDF8F0 0%,#F7EEE0 45%,#EFE3D1 100%);
}
.intro>*{z-index:1}
@media (min-width:560px){
  .intro-video{object-fit:contain}
  /* contain 后左右会露出背景，用极淡的同色渐变把接缝柔化 */
  .intro::before{
    background:
      radial-gradient(ellipse 42% 60% at 50% 45%, rgba(255,236,203,.75), rgba(255,236,203,0) 72%),
      linear-gradient(180deg,#FBF4E9 0%,#F6ECDD 50%,#EFE2CE 100%);
  }
}
/* 视频不可用时的兜底：纯 CSS 燃烧动画 */
.intro-fallback{position:absolute;inset:0;display:none}
.intro.video-fail .intro-video{display:none}
.intro.video-fail .intro-fallback{display:block}
.ember{
  position:absolute;left:50%;top:44%;width:14px;height:14px;margin:-7px;border-radius:50%;
  background:radial-gradient(circle,#FFE9BC,#F2B25C 55%,rgba(242,178,92,0));
  animation:ember-burn 1.9s var(--ease) both;
}
.intro-glow{
  position:absolute;left:50%;top:44%;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,214,150,.85),rgba(242,200,120,.22) 45%,rgba(255,255,255,0) 70%);
  mix-blend-mode:screen;transform:translate(-50%,-50%) scale(.2);opacity:0;
  animation:glow-spread 2.3s var(--ease) .45s both;
}
/* 品牌文字标：纯文字排版（无图片、无白底），视频播完后浮现 */
.intro-brand{
  position:relative;z-index:2;margin:0;display:flex;flex-direction:column;
  align-items:center;gap:14px;opacity:0;pointer-events:none;color:var(--ink);
  /* 视觉平衡：中文疏排在字面左侧留白会显得右偏，整体向左微调补偿 */
  margin-left:-.06em;
}
.intro.ready .intro-brand{animation:brand-in 1.15s var(--ease) .1s both}
.ib-cn{
  font-family:var(--serif);font-size:clamp(32px,9vw,46px);font-weight:500;
  letter-spacing:.36em;text-indent:.36em;line-height:1.1;
  background:linear-gradient(168deg,#3A3026 6%,#8A6428 58%,#B08A3E 96%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--gold);
  padding-right:.36em;     /* 抵消末位疏排造成的右侧空隙，保证字面居中 */
}
/* 细分隔线：呼应品牌图里 SHIRAN 上下那道细线 */
.intro-brand::after{
  content:"";order:3;width:34px;height:1px;background:linear-gradient(90deg,
    rgba(154,111,46,0),rgba(154,111,46,.5),rgba(154,111,46,0));
}
.ib-en{
  order:2;font-family:var(--sans);font-size:9.5px;font-weight:500;
  letter-spacing:.72em;text-indent:.72em;color:var(--ink-3);
  padding-right:.72em;     /* 同上，让英文视觉居中 */
  margin-left:.05em;
}
@keyframes brand-in{
  0%{opacity:0;transform:translateY(14px) scale(.96);filter:blur(6px)}
  100%{opacity:1;transform:none;filter:none}
}
@media (max-width:431px){ .ib-en{font-size:9.5px;letter-spacing:.54em;text-indent:.54em} }

/* 点击「轻触进入」时燃起的火焰（纯 CSS：核心火苗 + 三层跳动火舌 + 底部光晕） */
.click-flame{
  position:absolute;left:50%;bottom:50%;z-index:3;
  width:150px;height:224px;margin-left:-75px;margin-bottom:-112px;
  pointer-events:none;opacity:0;
}
.cf-core,.cf-flame{
  position:absolute;left:50%;bottom:0;transform:translateX(-50%) scaleY(0);
  transform-origin:50% 100%;
  border-radius:50% 50% 46% 46% / 62% 62% 38% 38%;
  opacity:0;
}
.cf-core{width:40px;height:88px;background:linear-gradient(180deg,#FFF0C4 4%,#F7C368 38%,#E0862F 74%,rgba(190,86,32,0) 100%)}
.cf-flame1{width:68px;height:148px;background:linear-gradient(180deg,rgba(255,226,160,.92) 6%,rgba(240,158,66,.72) 46%,rgba(214,102,36,0) 100%)}
.cf-flame2{width:100px;height:204px;background:linear-gradient(180deg,rgba(255,206,132,.62) 10%,rgba(226,132,52,.4) 52%,rgba(200,92,32,0) 100%)}
.cf-flame3{
  width:136px;height:224px;
  background:radial-gradient(ellipse at 50% 78%,rgba(255,186,96,.5),rgba(210,110,44,.16) 52%,rgba(200,100,36,0) 76%);
}
.cf-glow{
  position:absolute;left:50%;bottom:-28px;width:380px;height:128px;margin-left:-190px;
  border-radius:50%;opacity:0;mix-blend-mode:screen;
  background:radial-gradient(ellipse at 50% 50%,rgba(255,190,110,.62),rgba(240,150,70,.18) 46%,rgba(230,140,60,0) 74%);
}
.intro.leaving .click-flame{opacity:1}
.intro.leaving .cf-core{animation:cf-rise 1.15s cubic-bezier(.16,.84,.44,1) both,cf-flick .55s ease-in-out .7s infinite alternate}
.intro.leaving .cf-flame1{animation:cf-rise 1.3s cubic-bezier(.16,.84,.44,1) .05s both,cf-flick .6s ease-in-out .78s infinite alternate}
.intro.leaving .cf-flame2{animation:cf-rise 1.45s cubic-bezier(.16,.84,.44,1) .1s both,cf-flick .66s ease-in-out .86s infinite alternate}
.intro.leaving .cf-flame3{animation:cf-rise 1.6s cubic-bezier(.16,.84,.44,1) .16s both,cf-flick .72s ease-in-out .94s infinite alternate}
.intro.leaving .cf-glow{animation:cf-glow 1.5s ease-out both}
@keyframes cf-rise{
  0%{opacity:0;transform:translateX(-50%) scaleY(.05) scaleX(.7)}
  55%{opacity:1}
  100%{opacity:1;transform:translateX(-50%) scaleY(1) scaleX(1)}
}
@keyframes cf-flick{
  0%{transform:translateX(-50%) scaleY(1) scaleX(1) skewX(0deg)}
  100%{transform:translateX(-50%) scaleY(.9) scaleX(1.05) skewX(2.5deg)}
}
@keyframes cf-glow{0%{opacity:0;transform:scale(.5)}60%{opacity:1}100%{opacity:.85;transform:scale(1.5)}}
/* 火焰升腾的同时整体渐隐，形成"点燃后进入"的过渡 */
.intro.leaving .intro-brand,
.intro.leaving .intro-enter,
.intro.leaving .intro-skip{animation:fade-out .52s ease-in forwards}
@keyframes fade-out{to{opacity:0;transform:translateY(-10px)}}
@media (prefers-reduced-motion:reduce){ .click-flame{display:none} }

.intro-enter{
  margin:0;font-size:13px;letter-spacing:.34em;text-indent:.34em;color:var(--ink-2);
  border:1px solid var(--line-2);border-radius:999px;padding:13px 30px;
  background:rgba(255,255,255,.72);backdrop-filter:blur(8px);opacity:0;
}
/* 视频播完（或兜底计时）后，JS 给 .intro 加 .ready，按钮与提示才浮现 */
.intro.ready .intro-enter{animation:enter-in .8s var(--ease) both,enter-pulse 2.6s ease-in-out .8s infinite}
.intro.ready .intro-skip{animation:enter-in .8s var(--ease) .25s both}
.intro-skip{
  position:absolute;bottom:calc(26px + env(safe-area-inset-bottom));margin:0;
  font-size:11px;letter-spacing:.2em;color:var(--ink-3);opacity:.75;
}
@keyframes ember-burn{
  0%{transform:scale(.35);opacity:0}
  28%{transform:scale(1);opacity:.9}
  58%{transform:scale(1.55) translateY(-7px);opacity:1}
  100%{transform:scale(2.7) translateY(-12px);opacity:0}
}
@keyframes glow-spread{
  0%{transform:translate(-50%,-50%) scale(.2);opacity:0}
  38%{opacity:1}
  100%{transform:translate(-50%,-50%) scale(1.65);opacity:0}
}
@keyframes logo-emerge{
  0%{opacity:0;filter:blur(10px) brightness(1.8);transform:translateY(10px) scale(.97)}
  100%{opacity:1;filter:blur(0) brightness(1);transform:none}
}
@keyframes enter-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes enter-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(201,164,92,.32)}
  50%{box-shadow:0 0 0 9px rgba(201,164,92,0)}
}
@media (prefers-reduced-motion:reduce){
  .intro-video,.intro-fallback{display:none}
  .intro.ready .intro-enter,.intro.ready .intro-skip{animation:none;opacity:1}
}

/* ---------- 蜡封信（点开蜡封，纸信展开） ----------
   层级：.env-body(底) < .env-flap(上封盖) < .env-pocket(正面口袋) < .env-letter(纸信) < .wax-seal(封蜡)
   纸信 z-index 高于口袋 → 被口袋遮住下缘，只露出上缘；开信时纸信上移才显露。 */
/* 信封置顶弹层：覆盖整页、居中展示，点蜡封后跳转「解语揭晓」新页 */
.env-overlay{
  position:fixed;inset:0;z-index:1100;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
}
.env-overlay[hidden]{display:none}
.env-backdrop{
  position:absolute;inset:0;z-index:0;
  background:rgba(24,20,16,.42);
  backdrop-filter:saturate(120%) blur(7px);
  -webkit-backdrop-filter:saturate(120%) blur(7px);
  animation:env-fade .42s var(--ease) both;
}
@keyframes env-fade{from{opacity:0}to{opacity:1}}
.env-stage{
  position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;gap:22px;
}
/* 入场：从下方带阻尼地「弹出」——比线性下移更有重量感与仪式感 */
.env-stage{animation:env-pop .78s cubic-bezier(.18,1.24,.4,1) both}
@keyframes env-pop{
  0%{opacity:0;transform:translateY(46px) scale(.9)}
  62%{opacity:1;transform:translateY(-6px) scale(1.03)}
  100%{opacity:1;transform:translateY(0) scale(1)}
}
.envelope{
  position:relative;width:298px;height:200px;cursor:pointer;
  filter:drop-shadow(0 30px 46px rgba(52,38,22,.2));
}
/* 单一主体：底色 + 描边 + 圆角 + 溢出裁切都在这一层（避免多层描边露缝） */
.env-body{
  position:absolute;inset:0;border-radius:10px;overflow:hidden;
  background:linear-gradient(158deg,#F6EFE1 0%,#EFE5D2 46%,#E7DAC3 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.85),inset 0 0 0 1px rgba(255,255,255,.5);
}
/* 纸质感斜纹 */
.env-body::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(58deg,rgba(255,255,255,.14) 0 1px,rgba(150,124,88,.05) 1px 3px);
  opacity:.5;
}
/* 信封内衬：垫在封盖斜边与口袋V缘之间的月牙空隙，防止白色纸信透出（漏白） */
.env-liner{
  position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(178deg,#F2E7D0 0%,#EADCC1 55%,#E2D2B4 100%);
  clip-path:polygon(0 0,100% 0,100% 34%,50% 74%,0 34%);
  transition:opacity .38s var(--ease);
}
/* 上封盖（三角，闭合时压住纸信上缘） */
.env-flap{
  position:absolute;left:0;right:0;top:0;height:56%;z-index:2;transform-origin:top center;
  background:linear-gradient(176deg,#F9F2E5,#EEE3CC 60%,#E4D7BD);
  clip-path:polygon(0 0,100% 0,50% 100%);
  filter:drop-shadow(0 1px 0 rgba(255,255,255,.9));
  transition:transform .72s var(--ease),z-index 0s .34s;
}
/* 正面口袋：clip-path 做出标准信封的V 形上缘，盖住纸信下缘 */
.env-pocket{
  position:absolute;inset:0;z-index:3;pointer-events:none;
  background:linear-gradient(172deg,#F5ECDC 0%,#EDE2CB 58%,#E5D8BF 100%);
  clip-path:polygon(0 34%,50% 74%,100% 34%,100% 100%,0 100%);
  box-shadow:0 -1px 0 rgba(255,255,255,.75) inset;
}
/* 口袋上缘的高光折线，增强折叠立体感 */
.env-pocket::before{
  content:"";position:absolute;left:0;right:0;top:0;height:74%;
  background:linear-gradient(172deg,rgba(255,255,255,.5),rgba(255,255,255,0) 60%);
  clip-path:polygon(0 34%,50% 74%,100% 34%,100% 100%,0 100%);
}
/* 内里的纸信：下缘被口袋遮住 */
.env-letter{
  position:absolute;left:15px;right:15px;top:13px;bottom:14px;z-index:1;
  border-radius:6px;overflow:hidden;
  background:linear-gradient(180deg,#FFFDF9,#FBF7EF);
  box-shadow:0 3px 10px -5px rgba(60,44,24,.42);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;
  transition:transform .85s var(--ease);
}
.env-brand{font-family:var(--serif);font-size:12.5px;letter-spacing:.22em;color:#3A3026}
.env-rule{width:54%;height:1px;background:rgba(58,48,38,.1)}
.env-rule.short{width:34%}
/* 封蜡：深琥珀蜡滴 + 品牌文字标 */
.wax-seal{
  position:absolute;left:50%;top:56%;z-index:6;width:76px;height:76px;margin:-38px 0 0 -38px;
  border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  background:radial-gradient(circle at 34% 26%,rgba(228,170,108,.96),rgba(160,92,42,.98) 56%,rgba(108,57,21,1) 100%);
  box-shadow:
    0 9px 20px -6px rgba(78,38,10,.68),
    inset 0 2px 6px rgba(255,232,196,.48),
    inset 0 -4px 9px rgba(52,22,4,.52),
    0 0 0 1px rgba(255,226,190,.24);
  transition:transform .28s var(--ease);
  overflow:hidden;
}
.wax-seal::before{
  content:"";position:absolute;inset:-2px;border-radius:50%;
  background:radial-gradient(circle at 62% 74%,rgba(255,214,164,.3),rgba(255,214,164,0) 46%);
}
.ws-cn{
  font-family:var(--serif);font-size:19px;line-height:1;letter-spacing:.08em;text-indent:.08em;
  color:#FBEBD4;text-shadow:0 1px 1px rgba(70,32,6,.62);
}
.ws-en{
  font-family:var(--sans);font-size:7px;font-weight:600;letter-spacing:.3em;text-indent:.3em;
  color:rgba(252,232,206,.9);text-shadow:0 1px 1px rgba(70,32,6,.5);
}
.envelope:hover .wax-seal{transform:scale(1.055)}
/* 封蜡微呼吸：静止时也有生命感，引导点击 */
.wax-seal::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  background:radial-gradient(circle,rgba(226,150,80,.32),rgba(210,120,50,0) 68%);
  animation:seal-breathe 2.8s ease-in-out infinite;
}
@keyframes seal-breathe{
  0%,100%{opacity:.32;transform:scale(.94)}
  50%{opacity:.7;transform:scale(1.1)}
}
/* 提示文字渐入，与信封弹出衔接 */
.env-stage .env-hint{animation:hint-in .7s var(--ease) .34s both}
@keyframes hint-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.env-hint{margin:0;font-size:12px;letter-spacing:.16em;color:var(--ink-3);text-align:center}
/* 开信动画：蜡封裂开 -> 封盖翻起 -> 纸信升起 */
.envelope.opening{pointer-events:none;cursor:default}
.envelope.opening .wax-seal{animation:seal-crack .55s var(--ease) both}
.envelope.opening .env-flap{z-index:1;transform:rotateX(-172deg)}
.envelope.opening .env-liner{opacity:0}
.envelope.opening .env-letter{z-index:2;transform:translateY(-74%)}
@keyframes seal-crack{
  0%{transform:scale(1);opacity:1}
  42%{transform:scale(1.2) rotate(-4deg);opacity:1}
  100%{transform:scale(.55);opacity:0}
}
@media (max-width:431px){
  .envelope{width:268px;height:180px}
  .wax-seal{width:66px;height:66px;margin:-33px 0 0 -33px}
  .ws-cn{font-size:16px}
  .ws-en{font-size:6px}
}

/* ---------- 解语揭晓页（reveal.html · 信封跳转后的新页） ---------- */
.reveal-top{display:flex;justify-content:flex-start;margin:6px 0 16px}
.reveal-top .ghost{flex:none;min-width:auto;padding:10px 18px;font-size:13px}
.reveal-msg{margin:64px auto 0;max-width:480px;text-align:center}
.rm-text{font-size:15px;color:var(--ink-2);line-height:1.95;margin-bottom:24px;text-wrap:balance}
.reveal-msg .btn{border-radius:999px;padding:0 30px;font-size:14px}
.reveal-msg[hidden]{display:none}

/* ---------- 页脚补充（2026-10-14 对齐说明卡：品牌语 + 安全提示） ---------- */
.foot .tagline{margin-top:18px;color:var(--gold);letter-spacing:.2em;font-size:13px}
.foot .safe{max-width:470px;margin:12px auto 0;font-size:11px;color:var(--ink-3);line-height:1.95;text-align:center;letter-spacing:.02em}

/* ---------- 合规页脚：隐私政策 / 用户协议 / 备案号（2026-10-14 新增，服务 ICP 备案与小程序提审） ---------- */
.legal-links{margin-top:10px;font-size:12px;letter-spacing:.04em;line-height:1.9}
.legal-links a{color:inherit;text-decoration:none;border-bottom:1px solid rgba(154,111,46,.35);padding-bottom:1px}
.legal-links a:hover{color:#9A6F2E}
.legal-links .sep{opacity:.45;margin:0 .45em}
.beian{margin-top:5px;font-size:11.5px;letter-spacing:.03em;opacity:.8}
.beian a{color:inherit;text-decoration:none}
.beian a:hover{color:#9A6F2E}
.beian[hidden]{display:none}

/* ---------- 移动端首屏压缩（2026-10-14）：让输码框落在首屏，无需下滑 ---------- */
@media (max-width:600px){
  .hero{padding:30px 0 22px}
  .brand{margin-bottom:16px}
  .candle{width:92px;margin-bottom:20px}
  h1{font-size:clamp(22px,6.2vw,28px);line-height:1.32}
  .lede{font-size:13.5px;margin-top:14px;line-height:1.8}
  .search{margin-top:0}
  .cta{margin:0 0 12px}
  .steps{margin:22px auto 40px}
  .hint{margin-top:14px}
}

/* ---------- 中文排版收尾（2026-10-14 客户反馈「有的手机出现单字独占一行」）----------
   成因是「某一行正好差几个字排不下」，于是最后一个字被挤到下一行独占一行。
   三条措施：
     ① text-wrap:pretty —— 重排断点，尽量避免末行过短；
     ② text-wrap:balance —— 短句把字数平均分行；
     ③ 优先在标点处断行 + 小屏收窄留白 —— 既减少「差一点」的情况，
        也避免把「烛光」「褶皱」这类词劈到两行。
   老浏览器不认识这些属性会直接忽略，不影响布局。 */
p, li, em, .foot .safe, .plain, .art, .en { text-wrap: pretty; }
/* 短句（一两行就完的）用 balance：把字数平均分到各行，末行不会只剩一个字 */
.hint, h1, h2, .lede { text-wrap: balance; }
/* 中文断行优先落在标点；overflow-wrap 兜底防止个别长段溢出 */
.lede, .hint, .steps li, .plain, .art, .rm-text { word-break: keep-all; overflow-wrap: anywhere; }

@media (max-width:431px){
  .wrap{padding:0 18px 70px}
  .nav-in{padding:13px 16px}
  .steps{padding:6px 16px}
  .steps li{font-size:12.5px;gap:12px}
  .hint{font-size:11.5px}
  .foot .safe{font-size:10.5px}
}