:root{
  --bg:#F5F1E8;--bg2:#FAF9F5;--card:#FFFDF8;--surface:#EFE9DE;--surface2:#E8E1D3;
  --text:#2B2A27;--muted:#6B6862;--line:#E5DFD3;
  --pri:#C96442;--pri2:#B5573A;--pri-soft:#F6E6DD;
  --danger:#B4473A;--danger-soft:#F7E4DF;--ok:#4F7A52;--ok-soft:#E6EFE2;
  --radius:14px;
  --serif:"Source Serif 4","Source Serif Pro","Noto Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  --sans:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);--spring:cubic-bezier(.34,1.56,.64,1);--out:cubic-bezier(.4,0,1,1);
  --shadow:0 1px 2px rgba(60,45,25,.05),0 6px 20px rgba(60,45,25,.06);
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 var(--sans);-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}
body{min-height:100vh;background:linear-gradient(180deg,var(--bg2) 0,var(--bg) 320px)}
::selection{background:#F0D5C7}
a{color:var(--pri);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--pri2)}
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.005em;color:var(--text)}
.wrap{max-width:880px;margin:0 auto;padding:24px 20px 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.hero{text-align:center;margin:64px 0 28px}
.hero h1{margin:0;font-size:32px;line-height:1.25}
.hero p{margin:8px 0 0;color:var(--muted)}
.logo{width:56px;height:56px;border-radius:16px;margin:0 auto 18px;background:var(--pri);display:grid;place-items:center;color:#FFF8F2;font-size:26px;box-shadow:0 6px 18px rgba(201,100,66,.28)}
.auth{max-width:420px;margin:0 auto;padding:28px}
.tabs{display:flex;background:var(--surface);border-radius:999px;padding:4px;margin-bottom:20px}
.tabs button{flex:1;border:0;background:transparent;padding:8px;border-radius:999px;font:inherit;font-size:15px;color:var(--muted);cursor:pointer;transition:background .15s,color .15s}
.tabs button:hover{color:var(--text)}
.tabs button.on{background:var(--card);color:var(--text);box-shadow:0 1px 3px rgba(60,45,25,.1);font-weight:600}
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px;font-weight:500}
input,textarea,select{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:12px;font:inherit;background:var(--bg2);color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s,background .15s}
input::placeholder,textarea::placeholder{color:#A39E94}
input:hover,textarea:hover,select:hover{border-color:#D8D0C1}
input:focus,textarea:focus,select:focus{border-color:var(--pri);background:#fff;box-shadow:0 0 0 3px rgba(201,100,66,.14)}
textarea{min-height:240px;resize:vertical;line-height:1.7}
.addr{display:flex;align-items:center;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--bg2);transition:border-color .15s,box-shadow .15s}
.addr:focus-within{border-color:var(--pri);box-shadow:0 0 0 3px rgba(201,100,66,.14)}
.addr input{border:0;box-shadow:none!important;border-radius:0;background:transparent}
.addr span{padding:0 14px;color:var(--muted);white-space:nowrap;background:var(--surface);align-self:stretch;display:flex;align-items:center;border-left:1px solid var(--line)}
.btn{position:relative;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:999px;padding:9px 18px;font:inherit;font-weight:500;cursor:pointer;background:var(--pri);color:#FFF8F2;text-decoration:none;white-space:nowrap;transition:background .18s,border-color .18s,color .18s,box-shadow .18s,transform .42s var(--spring)}
.btn:hover{background:var(--pri2);color:#fff}
.btn:focus-visible,.pill:focus-visible,.tabs button:focus-visible,.seg button:focus-visible{outline:2px solid var(--pri);outline-offset:2px}
.btn:disabled{opacity:.55;cursor:default}
.btn.block{width:100%;margin-top:22px;padding:12px}
.btn.ghost{background:var(--card);color:var(--text);border-color:var(--line)}
.btn.ghost:hover{background:var(--surface);border-color:#DCD4C6}
.btn.danger{background:transparent;color:var(--danger);border-color:#EBCFC8}
.btn.danger:hover{background:var(--danger-soft)}
.btn.sm{padding:6px 14px;font-size:13px}
.msg{margin-top:12px;font-size:14px;min-height:20px}
.msg.e{color:var(--danger)}.msg.s{color:var(--ok)}
.hint{color:var(--muted);font-size:12.5px;margin-top:6px}
.top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.top .me{flex:1;min-width:200px}
.top .me b{font-family:var(--serif);font-weight:500;font-size:20px;word-break:break-all}
.top .me small{display:block;color:var(--muted);font-size:12.5px}
.folders{display:flex;gap:6px;margin-bottom:14px;align-items:center;flex-wrap:wrap}
.folders .sp{flex:1}
.pill{text-decoration:none;border:1px solid transparent;background:transparent;border-radius:999px;padding:6px 16px;cursor:pointer;color:var(--muted);font:inherit;transition:background .15s,color .15s}
.pill:hover{background:var(--surface);color:var(--text)}
.pill.on{background:var(--surface2);color:var(--text);font-weight:600}
.badge{display:inline-block;min-width:18px;padding:0 6px;border-radius:9px;background:var(--pri);color:#fff;font-size:11.5px;line-height:18px;text-align:center;margin-left:4px;font-weight:600}
.card.list{padding:0;overflow:hidden}
.item{display:flex;gap:14px;padding:16px 20px;border-bottom:1px solid var(--line);cursor:pointer;text-decoration:none;color:inherit;transition:background .12s}
.item:last-child{border-bottom:0}
.item:hover{background:var(--bg2)}
.item .av{flex:none;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:600;font-size:15px;font-family:var(--serif)}
.item .bd{flex:1;min-width:0}
.item .r1{display:flex;gap:8px;align-items:baseline}
.item .who{flex:1;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .tm{color:var(--muted);font-size:12px;white-space:nowrap}
.item .sj{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .sn{color:var(--muted);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item.unread{background:#FFFBF4}
.item.unread .who,.item.unread .sj{font-weight:650}
.item.unread .who::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--pri);margin-right:7px;vertical-align:middle}
.empty{text-align:center;color:var(--muted);padding:64px 20px}
.empty .ic{font-size:38px;margin-bottom:10px;opacity:.85}
.view{padding:24px 28px}
.view h2{margin:6px 0 12px;font-size:26px;line-height:1.3;word-break:break-word}
.meta{color:var(--muted);font-size:13.5px;word-break:break-all;line-height:1.8}
.meta b{color:var(--text);font-weight:500}
.bar{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0;align-items:center}
.bar .sp{flex:1}
iframe.mail{display:block;width:1px;min-width:100%;max-width:100%;height:60vh;border:1px solid var(--line);border-radius:12px;background:#fff}
pre.text{white-space:pre-wrap;word-break:break-word;font-size:14.5px;line-height:1.75;font-family:inherit;margin:0;padding:16px 18px;background:var(--bg2);border:1px solid var(--line);border-radius:12px;max-height:70vh;overflow:auto}
.atts{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.att{display:flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--text);font-size:13px;max-width:100%;background:var(--bg2);transition:border-color .15s,background .15s}
.att:hover{border-color:var(--pri);background:var(--pri-soft);color:var(--text)}
.att small{color:var(--muted)}
.seg{display:inline-flex;background:var(--surface);border-radius:999px;padding:3px}
.seg button{border:0;background:transparent;padding:5px 14px;border-radius:999px;cursor:pointer;font:inherit;font-size:13px;color:var(--muted);transition:background .15s,color .15s}
.seg button:hover{color:var(--text)}
.seg button.on{background:var(--card);color:var(--text);box-shadow:0 1px 2px rgba(60,45,25,.1);font-weight:600}
.toast{position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom));transform:translate(-50%,18px) scale(.96);background:var(--text);color:#FAF9F5;padding:10px 20px;border-radius:999px;font-size:14px;opacity:0;transition:opacity .2s ease,transform .32s var(--ease);pointer-events:none;z-index:30;box-shadow:0 8px 24px rgba(40,30,20,.2);max-width:90vw;will-change:transform,opacity}
.toast.show{opacity:1;transform:translate(-50%,0) scale(1);transition:opacity .2s ease,transform .42s var(--spring)}
.quota{font-size:13px;color:var(--muted)}
.files{font-size:13px;color:var(--muted);margin-top:6px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-weight:500;font-size:12px;letter-spacing:.02em;background:var(--bg2)}
tr:hover td{background:#FFFBF4}
.tbl{overflow-x:auto}
.tag{display:inline-block;padding:1px 10px;border-radius:999px;font-size:12px;background:var(--surface);color:var(--muted)}
.tag.ok{background:var(--ok-soft);color:var(--ok)}.tag.bad{background:var(--danger-soft);color:var(--danger)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surface);padding:2px 7px;border-radius:6px;font-size:.92em}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row>*{flex:1;min-width:140px}
.row>.btn{flex:none}
h3{margin:0 0 8px;font-size:19px}
.mt{margin-top:18px}
@media (max-width:600px){
  .wrap{padding:14px 12px 32px}
  .card{padding:18px;border-radius:12px}
  .card.list{padding:0}
  .view{padding:18px 14px}
  .view h2{font-size:22px}
  .hero{margin-top:36px}.hero h1{font-size:27px}
  .auth{padding:22px}
  .item{padding:14px}
  iframe.mail{border-radius:10px}
  .top .btn{padding:7px 14px}
  .top .me b{font-size:18px}
}


/* ================= 动效 Motion ================= */
html{-webkit-tap-highlight-color:transparent}
a,button,input,textarea,select,label,.item,.pill,.att{touch-action:manipulation}

/* 按压反馈：按下快速缩小，松开弹簧回弹 */
.pill,.tabs button,.seg button,.att{transition:background .18s,color .18s,border-color .18s,transform .42s var(--spring)}
.item{transition:background .18s,transform .42s var(--spring)}
.btn:active{transform:scale(.97);transition-duration:.18s,.18s,.18s,.18s,.08s}
.pill:active,.tabs button:active,.seg button:active,.att:active{transform:scale(.97);transition-duration:.18s,.18s,.18s,.08s}
.item:active{transform:scale(.985);transition-duration:.18s,.08s}
.btn:disabled:active{transform:none}
@media (hover:hover){
  .btn:not(:disabled):hover{transform:translateY(-1px)}
  .btn:not(.ghost):not(.danger):not(:disabled):hover{box-shadow:0 4px 14px rgba(201,100,66,.28)}
  .btn:not(:disabled):active{transform:scale(.97)}
  .att:hover{transform:translateY(-1px)}
  .att:active{transform:scale(.97)}
}
.btn.ghost:active{background:var(--surface2)}
.btn.danger:active{background:#F2D6CF}

/* 主按钮点击涟漪 */
.ripple{position:absolute;border-radius:50%;pointer-events:none;background:rgba(255,248,242,.38);transform:scale(0);opacity:1;animation:ripple .55s var(--ease) forwards}
@keyframes ripple{to{transform:scale(1);opacity:0}}

/* 滑动指示器（登录/注册标签、文件夹、网页版/纯文本） */
.has-ind{position:relative;isolation:isolate}
.has-ind>.ind{position:absolute;left:0;top:0;z-index:-1;border-radius:999px;pointer-events:none;transform-origin:0 50%;will-change:transform}
.tabs.has-ind>.ind,.seg.has-ind>.ind{background:var(--card);box-shadow:0 1px 3px rgba(60,45,25,.1)}
.folders.has-ind>.ind{background:var(--surface2)}
.has-ind>button.on,.has-ind>.pill.on{background:transparent!important;box-shadow:none!important}
.has-ind>.pill.on:hover{background:transparent}

/* 进入动画（无 View Transitions 时的降级，以及内容替换） */
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeOut{from{opacity:1}to{opacity:0}}
@keyframes inR{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
@keyframes inL{from{opacity:0;transform:translateX(-14px)}to{opacity:1;transform:none}}
@keyframes outR{to{opacity:0;transform:translateX(14px)}}
@keyframes outL{to{opacity:0;transform:translateX(-14px)}}
@keyframes pushIn{from{transform:translateX(100%)}to{transform:none}}
@keyframes pushOut{to{transform:translateX(-28%);opacity:.6}}
@keyframes popIn{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
@keyframes sheetIn{from{opacity:0;transform:translateY(36px)}to{opacity:1;transform:none}}
.fade-up{animation:fadeUp .22s var(--ease) both}
.enter-fwd,.enter-fade{animation:fadeUp .22s var(--ease) both}
.enter-back{animation:fadeUp .22s var(--ease) both}
.enter-side-l{animation:inR .24s var(--ease) both}
.enter-side-r{animation:inL .24s var(--ease) both}
.enter-pop{animation:popIn .24s var(--ease) both}
.swap-in-l{animation:inR .22s var(--ease) both}
.swap-in-r{animation:inL .22s var(--ease) both}
@media (max-width:600px){
  .enter-fwd{animation:inR .26s var(--ease) both}
  .enter-back{animation:inL .26s var(--ease) both}
  .enter-pop{animation:sheetIn .3s var(--ease) both}
}

/* View Transitions：顶栏/文件夹栏保持不动，只切换内容区 */
.top{view-transition-name:topbar}
.folders{view-transition-name:folders}
::view-transition-old(topbar),::view-transition-new(topbar),::view-transition-old(folders),::view-transition-new(folders){animation:none}
::view-transition-old(topbar):not(:only-child),::view-transition-old(folders):not(:only-child){opacity:0}
::view-transition-old(folders):only-child{animation:fadeOut .14s ease both}
::view-transition-new(folders):only-child{animation:fadeIn .2s ease both}
::view-transition-group(*){animation-duration:.24s;animation-timing-function:var(--ease)}
::view-transition-old(root),::view-transition-new(root){animation-duration:.24s;animation-timing-function:var(--ease)}
html[data-vt=fwd]::view-transition-old(root),html[data-vt=back]::view-transition-old(root),html[data-vt=pop]::view-transition-old(root),html[data-vt=fade]::view-transition-old(root){animation:fadeOut .14s ease both}
html[data-vt=fwd]::view-transition-new(root),html[data-vt=back]::view-transition-new(root),html[data-vt=fade]::view-transition-new(root){animation:fadeUp .22s var(--ease) both}
html[data-vt=pop]::view-transition-new(root){animation:popIn .24s var(--ease) both}
html[data-vt=side-l]::view-transition-old(root){animation:outL .18s var(--out) both}
html[data-vt=side-l]::view-transition-new(root){animation:inR .24s var(--ease) both}
html[data-vt=side-r]::view-transition-old(root){animation:outR .18s var(--out) both}
html[data-vt=side-r]::view-transition-new(root){animation:inL .24s var(--ease) both}
@media (max-width:600px){
  /* 手机：列表 ⇄ 正文 左右推入推出 */
  html[data-vt=fwd]::view-transition-old(root){animation:pushOut .3s var(--ease) both}
  html[data-vt=fwd]::view-transition-new(root){animation:pushIn .3s var(--ease) both;box-shadow:-8px 0 24px rgba(60,45,25,.10)}
  html[data-vt=back]::view-transition-old(root){animation:pushIn .3s var(--ease) reverse both;z-index:2;box-shadow:-8px 0 24px rgba(60,45,25,.10)}
  html[data-vt=back]::view-transition-new(root){animation:pushOut .3s var(--ease) reverse both}
  html[data-vt=pop]::view-transition-new(root){animation:sheetIn .3s var(--ease) both}
}

/* 列表：依次淡入、新邮件高亮、删除折叠 */
.item{position:relative}
.item.stagger{animation:fadeUp .3s var(--ease) both;animation-delay:calc(var(--i,0) * 32ms)}
.item.new{animation:newIn .38s var(--ease) both}
.item.new::after{content:"";position:absolute;inset:0;background:var(--pri-soft);box-shadow:inset 3px 0 0 var(--pri);pointer-events:none;opacity:0;animation:flash 1.8s ease-out both}
@keyframes newIn{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:none}}
@keyframes flash{0%{opacity:0}12%{opacity:.95}60%{opacity:.7}100%{opacity:0}}
.item.bye{overflow:hidden;pointer-events:none}

/* 骨架屏 */
.sk{display:block;background:var(--surface);border-radius:7px;position:relative;overflow:hidden;height:12px}
.sk::after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,253,248,.75),transparent);animation:shimmer 1.25s ease-in-out infinite}
@keyframes shimmer{to{transform:translateX(100%)}}
.item.skel{cursor:default;pointer-events:none}
.item.skel .av{background:var(--surface)}
.item.skel .bd{display:flex;flex-direction:column;gap:9px;padding-top:3px}
.sk.av{width:38px;height:38px;border-radius:50%;flex:none}
.view .sk+.sk{margin-top:10px}

/* 弹窗（确认删除） */
.modal-bg{position:fixed;inset:0;z-index:20;background:rgba(43,42,39,.32);display:grid;place-items:center;padding:20px;animation:fadeIn .2s ease both}
.modal{width:100%;max-width:360px;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 20px 60px rgba(40,30,20,.22);padding:22px 22px 18px;animation:popIn .26s var(--spring) both}
.modal h3{margin:0 0 6px}
.modal p{margin:0;color:var(--muted);font-size:14px}
.modal .bar{justify-content:flex-end;margin:18px 0 0}
.modal-bg.out{animation:fadeOut .16s ease both}
.modal-bg.out .modal{animation:popOut .16s var(--out) both}
@keyframes popOut{to{opacity:0;transform:scale(.97)}}
@media (max-width:600px){
  .modal-bg{place-items:end center;padding:12px 12px calc(12px + env(safe-area-inset-bottom))}
  .modal{max-width:none;animation:sheetIn .3s var(--ease) both}
  .modal-bg.out .modal{animation:sheetOut .18s var(--out) both}
  .modal .bar .btn{flex:1}
}
@keyframes sheetOut{to{opacity:0;transform:translateY(36px)}}

/* 系统"减少动态效果"：全部关闭 */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  ::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}
}