:root{
  --bg:#f4f6f9; --panel:#ffffff; --panel-2:#fafbfc;
  --line:#e6e9ef; --line-strong:#d5dae3;
  --text:#1c2333; --text-2:#5b6577; --text-3:#98a2b3;
  --brand:#2f6bff; --brand-soft:#eef3ff; --brand-2:#6b4fff;
  --danger:#e5484d; --ok:#12a150; --star:#f5a524;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.06);
  --shadow-lg:0 24px 60px rgba(16,24,40,.18);
  --top-h:56px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;overflow:hidden;
}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,textarea,select{font:inherit}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#d3d8e0;border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

/* ── 登录页 ── */
/* hidden 属性必须真正隐藏：display 由各自规则控制时会覆盖浏览器默认的 [hidden] 行为 */
[hidden]{display:none !important}

.auth-screen{
  position:fixed;inset:0;display:grid;place-items:center;
  background:linear-gradient(135deg,#eef3ff,#f7f4ff 60%,#f4f6f9);z-index:200;
}
.auth-card{
  width:380px;max-width:calc(100vw - 40px);background:#fff;border-radius:16px;
  box-shadow:0 20px 60px rgba(16,24,40,.12);padding:30px 28px 24px;
}
.auth-brand{display:flex;align-items:center;gap:11px;margin-bottom:22px}
.auth-brand b{font-size:17px;display:block;line-height:1.3}
.auth-brand small{color:var(--text-3);font-size:12.5px}
.auth-form label{display:block;font-size:12px;color:var(--text-2);margin:0 0 6px;font-weight:500}
.auth-form input{
  width:100%;height:40px;border:1px solid var(--line);border-radius:9px;padding:0 12px;
  margin-bottom:14px;outline:none;transition:.15s;background:var(--panel-2);
}
.auth-form input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px var(--brand-soft)}
.btn-primary{
  width:100%;height:40px;border-radius:9px;background:var(--brand);color:#fff;font-weight:600;
  box-shadow:0 4px 14px rgba(47,107,255,.3);transition:.15s;
}
.btn-primary:hover{background:#255ce0}
.btn-primary:disabled{opacity:.6;cursor:not-allowed}
.auth-error{color:var(--danger);font-size:12.5px;margin-top:10px;min-height:18px}
.auth-switch{text-align:center;margin-top:16px;font-size:12.5px;color:var(--text-3)}
.auth-switch a{color:var(--brand);text-decoration:none}
.auth-switch a:hover{text-decoration:underline}

/* ── 主布局 ── */
.app{display:flex;flex-direction:column;height:100vh}
.demo-bar{
  height:26px;flex:0 0 26px;display:flex;align-items:center;justify-content:center;gap:8px;
  background:#fff7e6;color:#8a5a00;font-size:11.5px;border-bottom:1px solid #ffe1a8;
}
.demo-bar b{font-weight:700}
.topbar{
  height:var(--top-h);flex:0 0 var(--top-h);display:flex;align-items:center;gap:14px;
  padding:0 16px;background:var(--panel);border-bottom:1px solid var(--line);z-index:30;
}
.brand{display:flex;align-items:center;gap:9px;user-select:none}
.logo{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;font-size:14px;
  box-shadow:0 4px 12px rgba(47,107,255,.35);flex:0 0 28px;
}
.brand b{font-size:15px}
.brand small{color:var(--text-3);font-size:11px;margin-left:2px}

.searchbox{flex:1;max-width:560px;position:relative}
.searchbox input{
  width:100%;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);
  padding:0 12px 0 36px;outline:none;transition:.15s;
}
.searchbox input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px var(--brand-soft)}
.searchbox .ico{position:absolute;left:11px;top:9px;color:var(--text-3)}
.kbd{
  position:absolute;right:8px;top:8px;font-size:11px;color:var(--text-3);
  border:1px solid var(--line);border-radius:5px;padding:1px 5px;background:#fff;
}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:6px}
.icon-btn{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:var(--text-2);transition:.15s}
.icon-btn:hover{background:var(--panel-2);color:var(--text)}
.avatar{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;
  font-size:12px;background:linear-gradient(135deg,#4b7bff,#8a5cff);cursor:pointer;margin-left:4px;
}

.main{flex:1;display:flex;min-height:0}

/* ── 左栏 ── */
.sidebar{
  width:216px;flex:0 0 216px;background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:12px 10px;gap:2px;overflow-y:auto;
}
.compose{
  display:flex;align-items:center;justify-content:center;gap:8px;height:40px;border-radius:10px;
  margin:2px 2px 14px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:600;
  box-shadow:0 6px 18px rgba(47,107,255,.32);transition:.15s;
}
.compose:hover{transform:translateY(-1px)}
.nav-label{font-size:11px;font-weight:700;color:var(--text-3);letter-spacing:.6px;padding:12px 10px 6px}
.nav-item{
  display:flex;align-items:center;gap:10px;height:36px;padding:0 10px;border-radius:9px;
  color:var(--text-2);font-size:13.5px;cursor:pointer;transition:.12s;user-select:none;
}
.nav-item:hover{background:var(--panel-2);color:var(--text)}
.nav-item.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav-item .n{margin-left:auto;font-size:11.5px;color:var(--text-3);font-weight:600}
.nav-item .n.badge{background:var(--brand);color:#fff;border-radius:20px;padding:0 6px;line-height:17px;min-width:19px;text-align:center}
.storage{margin-top:auto;padding:12px 10px 4px}
.storage .bar{height:6px;border-radius:4px;background:#eceff4;overflow:hidden;margin:7px 0 6px}
.storage .bar i{display:block;height:100%;width:0;border-radius:4px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .3s}

/* ── 中栏 ── */
.list{width:392px;flex:0 0 392px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.list-head{padding:14px 16px 0;border-bottom:1px solid var(--line)}
.list-title{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.list-title h1{font-size:17px;margin:0;font-weight:700}
.list-title .cnt{font-size:12px;color:var(--text-3);background:var(--panel-2);border:1px solid var(--line);border-radius:20px;padding:1px 8px}
.list-title .tools{margin-left:auto;display:flex;gap:2px}
.mini{width:28px;height:28px;border-radius:7px;display:grid;place-items:center;color:var(--text-3)}
.mini:hover{background:var(--panel-2);color:var(--text)}
.tabs{display:flex;gap:4px;padding-bottom:10px;overflow-x:auto}
.tab{font-size:12.5px;color:var(--text-2);padding:5px 11px;border-radius:20px;white-space:nowrap;border:1px solid transparent;transition:.12s}
.tab:hover{background:var(--panel-2)}
.tab.on{background:var(--brand-soft);color:var(--brand);border-color:#dbe6ff;font-weight:600}

.rows{flex:1;overflow-y:auto;padding:6px}
.row{display:flex;gap:10px;padding:11px;border-radius:10px;cursor:pointer;position:relative;transition:.12s;border:1px solid transparent}
.row:hover{background:var(--panel-2)}
.row.active{background:var(--brand-soft);border-color:#dbe6ff}
.row.unread .r-from{font-weight:700;color:var(--text)}
.row.unread .r-subject{font-weight:650;color:var(--text)}
.row.unread::before{content:"";position:absolute;left:2px;top:50%;transform:translateY(-50%);width:3px;height:22px;border-radius:3px;background:var(--brand)}
.r-avatar{width:34px;height:34px;flex:0 0 34px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:12.5px;font-weight:700}
.a1{background:linear-gradient(135deg,#ff7a59,#ff4d6d)}
.a2{background:linear-gradient(135deg,#2f6bff,#00b8d9)}
.a3{background:linear-gradient(135deg,#12a150,#7bd88f)}
.a4{background:linear-gradient(135deg,#8a5cff,#c86dd7)}
.a5{background:linear-gradient(135deg,#f5a524,#ffd166)}
.a6{background:linear-gradient(135deg,#5b6577,#98a2b3)}
.r-main{flex:1;min-width:0}
.r-top{display:flex;align-items:baseline;gap:6px}
.r-from{font-size:13px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}
.r-time{margin-left:auto;font-size:11.5px;color:var(--text-3);white-space:nowrap}
.r-subject{font-size:13.5px;color:var(--text-2);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.r-snippet{font-size:12.5px;color:var(--text-3);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.r-meta{display:flex;align-items:center;gap:6px;margin-top:6px}
.chip{font-size:10.5px;padding:1px 7px;border-radius:20px;background:var(--panel-2);color:var(--text-2);border:1px solid var(--line);line-height:17px}
.star{color:#d9dee6;font-size:13px}
.star.on{color:var(--star)}
.empty-list{padding:44px 20px;text-align:center;color:var(--text-3);font-size:13px}
.empty-list svg{opacity:.45;margin-bottom:10px}

/* ── 右栏 ── */
.reader{flex:1;min-width:0;background:var(--bg);display:flex;flex-direction:column;overflow:hidden}
.reader[hidden]{display:none}
#readerContent{display:flex;flex-direction:column;height:100%;min-height:0}
.empty-state{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--text-3);gap:6px;
}
.empty-state svg{opacity:.4}
.reader-toolbar{
  height:52px;flex:0 0 52px;display:flex;align-items:center;gap:4px;padding:0 16px;
  background:var(--panel);border-bottom:1px solid var(--line);overflow-x:auto;
}
.btn{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 12px;border-radius:8px;
  font-size:13px;color:var(--text-2);border:1px solid var(--line);background:#fff;transition:.12s;white-space:nowrap;
}
.btn:hover{background:var(--panel-2);color:var(--text);border-color:var(--line-strong)}
.btn.ghost{border-color:transparent;background:transparent}
.sep{width:1px;height:20px;background:var(--line);margin:0 6px;flex:0 0 1px}

/* ── 翻译按钮与译文块 ── */
.btn.translate{color:#5b3fd6;border-color:#e2dcff;background:#f7f5ff;font-weight:600}
.btn.translate:hover{background:#efeaff;border-color:#d3c8ff}
.btn.translate.active{background:#6b4fff;border-color:#6b4fff;color:#fff}
.btn.translate.hinted::after{content:'';position:absolute;margin-left:2px;width:6px;height:6px;border-radius:50%;background:#f5a524}

.trans-block{
  margin:16px 24px 20px;border:1px solid #e2dcff;border-radius:11px;overflow:hidden;background:#fdfcff;
}
.trans-head{
  display:flex;align-items:center;gap:8px;padding:9px 13px;
  background:linear-gradient(90deg,#f7f5ff,#fbfaff);border-bottom:1px solid #eeebff;
  font-size:12px;color:#5b3fd6;
}
.trans-head .eng{font-weight:700}
.trans-head .badge-eng{
  font-size:10px;background:#6b4fff;color:#fff;border-radius:4px;padding:1px 5px;font-weight:700;letter-spacing:.3px;
}
.trans-head .badge-eng.local{background:#98a2b3}
.trans-head .meta{color:#8b7acc;font-family:ui-monospace,monospace;font-size:11px}
.trans-head .tacts{margin-left:auto}
.trans-head .tacts span{cursor:pointer;color:#6b4fff;font-weight:600}
.trans-head .tacts span:hover{text-decoration:underline}
.trans-body{padding:16px 18px 6px;font-size:14.5px;line-height:1.75;color:#28303f}
.trans-body p{margin:0 0 14px}
.trans-body a{color:var(--brand)}
.trans-note{font-size:11.5px;color:var(--text-3);padding:0 18px 12px;line-height:1.5}

.orig-toggle{
  margin:0 24px 8px;font-size:12px;color:var(--text-3);cursor:pointer;user-select:none;width:fit-content;
}
.orig-toggle:hover{color:var(--brand)}
.orig-wrap{background:var(--panel-2);border:1px dashed var(--line-strong);border-radius:10px}
.orig-wrap.collapsed{display:none}
.orig-wrap{padding:14px 16px;font-size:13.5px;line-height:1.7;color:var(--text-2)}

/* ── 联系人自动补全 ── */
.ac-box{
  position:fixed;z-index:120;background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow-lg);padding:5px;overflow:hidden;
}
.ac-box.hidden{display:none}
.ac-item{
  display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:7px;cursor:pointer;
}
.ac-item:hover,.ac-item.on{background:var(--brand-soft)}
.ac-avatar{
  width:26px;height:26px;flex:0 0 26px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-size:10.5px;font-weight:700;
}
.ac-main{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.35}
.ac-main b{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ac-main small{font-size:11px;color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ac-hint{font-size:10px;color:var(--text-3);background:var(--panel-2);border-radius:10px;padding:0 6px}
.reader-scroll{flex:1;overflow-y:auto;padding:22px 26px 40px}
.mail{
  max-width:860px;margin:0 auto;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;
}
.mail-head{padding:20px 24px 16px;border-bottom:1px solid var(--line)}
.mail-subject{font-size:20px;font-weight:700;margin:0 0 14px;line-height:1.35;word-break:break-word}
.sender{display:flex;gap:12px;align-items:flex-start}
.sender .r-avatar{width:40px;height:40px;flex:0 0 40px;font-size:14px}
.s-info{flex:1;min-width:0}
.s-line{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.s-name{font-weight:650}
.s-addr{color:var(--text-3);font-size:12.5px}
.s-to{color:var(--text-2);font-size:12.5px;margin-top:2px;word-break:break-word}
.s-time{color:var(--text-3);font-size:12.5px;white-space:nowrap;margin-left:auto}
.mail-body{padding:22px 24px 26px;font-size:14.5px;line-height:1.75;color:#28303f;word-break:break-word}
.mail-body p{margin:0 0 14px}
.mail-body a{color:var(--brand);text-decoration:none}
.mail-body img{max-width:100%;height:auto}
.mail-body blockquote{border-left:3px solid var(--line-strong);margin:14px 0;padding-left:14px;color:var(--text-2)}
.plain-body{white-space:pre-wrap;font-family:inherit}
.atts{display:flex;flex-wrap:wrap;gap:10px;padding:0 24px 20px}
.att{
  display:flex;align-items:center;gap:10px;padding:9px 12px 9px 10px;border:1px solid var(--line);
  border-radius:10px;background:var(--panel-2);min-width:200px;transition:.12s;cursor:pointer;
}
.att:hover{border-color:var(--brand);background:#fff}
.att .ft{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;font-size:9.5px;font-weight:800;color:#fff}
.ft.pdf{background:#e5484d}.ft.xlsx{background:#12a150}.ft.zip{background:#8a5cff}
.ft.doc{background:#2b579a}.ft.img{background:#2f6bff}.ft.txt{background:#5b6577}
.att .an{font-size:13px;font-weight:600;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.att .as{font-size:11.5px;color:var(--text-3)}

/* ── 写信 ── */
.composer{
  position:fixed;right:22px;bottom:0;width:600px;max-width:calc(100vw - 44px);
  background:var(--panel);border-radius:12px 12px 0 0;box-shadow:var(--shadow-lg);
  border:1px solid var(--line);border-bottom:0;display:flex;flex-direction:column;
  z-index:60;transition:transform .2s;
}
.composer.hidden{transform:translateY(calc(100% + 20px));pointer-events:none}
.c-head{height:44px;flex:0 0 44px;display:flex;align-items:center;gap:8px;padding:0 8px 0 16px;background:#1c2333;color:#fff;font-size:13.5px;font-weight:600}
.c-head .c-tools{margin-left:auto;display:flex;gap:2px}
.c-head .icon-btn{color:#aeb6c5;width:30px;height:30px}
.c-head .icon-btn:hover{background:rgba(255,255,255,.1);color:#fff}
.c-fields{display:flex;flex-direction:column}
.c-row{display:flex;align-items:center;gap:8px;padding:0 14px;height:42px;border-bottom:1px solid var(--line);font-size:13.5px}
.c-row label{width:52px;color:var(--text-3);font-size:12.5px;flex:0 0 52px}
.c-row input{flex:1;border:0;outline:none;background:transparent;height:100%}
.c-body{min-height:186px;max-height:40vh;overflow-y:auto;padding:14px 16px;outline:none;font-size:14px;line-height:1.7;color:#28303f}
.c-body:empty::before{content:attr(data-ph);color:var(--text-3)}
.c-att{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 10px}
.c-att:empty{display:none}
.c-att .att{min-width:0;padding:6px 8px;background:#fff;cursor:default}
.c-att .att .ft{width:26px;height:26px;font-size:8px}
.c-att .att .an{font-size:12px;max-width:150px}
.c-att .att .rm{margin-left:6px;color:var(--text-3);cursor:pointer;font-size:14px}
.c-foot{display:flex;align-items:center;gap:8px;padding:10px 14px 12px;border-top:1px solid var(--line);background:var(--panel-2)}
.c-foot .send{border-radius:8px;height:34px;padding:0 18px;font-weight:600;background:var(--brand);color:#fff;box-shadow:0 3px 10px rgba(47,107,255,.35)}
.c-foot .send:hover{background:#255ce0}
.c-hint{font-size:11.5px;color:var(--text-3);margin-left:auto}

/* ── 设置抽屉 ── */
.drawer-mask{position:fixed;inset:0;background:rgba(16,24,40,.35);opacity:0;pointer-events:none;transition:.2s;z-index:80}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:380px;max-width:92vw;background:#fff;z-index:81;
  box-shadow:var(--shadow-lg);transform:translateX(100%);transition:transform .22s;display:flex;flex-direction:column;
}
.drawer.open{transform:none}
.drawer-head{height:54px;display:flex;align-items:center;padding:0 16px;border-bottom:1px solid var(--line);font-weight:700;font-size:14.5px}
.drawer-head .close{margin-left:auto;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;color:var(--text-3)}
.drawer-head .close:hover{background:var(--panel-2);color:var(--text)}
.drawer-body{flex:1;overflow-y:auto;padding:16px}
.set-group{margin-bottom:22px}
.set-group h4{margin:0 0 4px;font-size:12px;color:var(--text-3);letter-spacing:.5px;text-transform:uppercase}
.set-row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--panel-2)}
.set-row .st{flex:1}
.set-row .st b{font-size:13.5px;font-weight:600;display:block}
.set-row .st small{font-size:11.5px;color:var(--text-3);display:block;margin-top:2px}
.select{height:32px;border:1px solid var(--line);border-radius:8px;padding:0 8px;font-size:13px;background:#fff}

/* ── Toast ── */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);
  background:#1c2333;color:#fff;padding:10px 16px;border-radius:10px;font-size:13px;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.22s;z-index:100;
  display:flex;align-items:center;gap:8px;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast .tick{color:#7bd88f}

/* ── 验签徽标（docs/11）─────────────────
   四种状态颜色必须不同，因为用户对它们的处置完全不同。
   temperror / none 一律走中性灰：把"暂时查不了"画成红色，
   用户会很快学会无视所有告警，那比不报警更糟。 */
.auth-line{margin-top:6px;display:flex;gap:5px;flex-wrap:wrap}
.auth-badge{
  display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;
  padding:2px 8px;border-radius:20px;line-height:17px;cursor:help;
  border:1px solid transparent;white-space:nowrap;
}
.auth-badge.auth-pass{background:#e8f8ee;color:#0d7a3a;border-color:#c6ecd5}
.auth-badge.auth-bad{background:#fdecec;color:#b02323;border-color:#f6d7d8}
.auth-badge.auth-unknown{background:#f4f6f9;color:#5b6577;border-color:#e6e9ef}
.auth-badge.auth-none{background:#f4f6f9;color:#98a2b3;border-color:#e6e9ef}

/* ── 响应式 ── */
@media (max-width:1180px){.list{width:330px;flex-basis:330px}.sidebar{width:190px;flex-basis:190px}}
@media (max-width:980px){.sidebar{display:none}.list{width:320px;flex-basis:320px}}
@media (max-width:760px){
  .list{width:100%;flex-basis:100%;border-right:0}
  .reader{display:none}
  body.show-reader .list{display:none}
  body.show-reader .reader{display:flex}
  .composer{right:0;left:0;width:100%;max-width:100%;border-radius:0}
  .brand small,.kbd{display:none}
}