:root{color-scheme:dark;--bg: #0b1020;--bg-elevated: #121a2f;--bg-panel: #162038;--border: #24304d;--text: #e8eefc;--muted: #9aa8c7;--accent: #5b8cff;--accent-2: #3dd6c6;--danger: #ff6b7a;--warning: #ffc857;--shadow: 0 10px 40px rgba(0, 0, 0, .35);--radius: 12px;--font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:radial-gradient(1200px 600px at 10% -10%,rgba(91,140,255,.18),transparent 60%),radial-gradient(900px 500px at 100% 0%,rgba(61,214,198,.12),transparent 55%),var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{min-height:100%;display:grid;grid-template-rows:auto 1fr}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;border-bottom:1px solid var(--border);background:#0b1020cc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.2px}.brand-dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 0 12px #5b8cffcc}.nav{display:flex;gap:8px;flex-wrap:wrap}.nav a{padding:8px 12px;border-radius:999px;color:var(--muted);border:1px solid transparent}.nav a.active,.nav a:hover{color:var(--text);background:#5b8cff1f;border-color:#5b8cff59}.main{padding:16px 20px 28px;min-height:0}.panel{background:linear-gradient(180deg,#162038f2,#121a2ff2);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}.input,.select{background:var(--bg-elevated);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:9px 12px;outline:none;min-width:0}.input:focus,.select:focus{border-color:#5b8cffb3;box-shadow:0 0 0 3px #5b8cff26}.btn{border:1px solid var(--border);background:var(--bg-elevated);color:var(--text);border-radius:10px;padding:9px 14px;transition:.15s ease}.btn:hover{border-color:#5b8cff8c}.btn-primary{background:linear-gradient(135deg,#4d7fff,#3aa8ff);border-color:transparent;color:#fff;font-weight:600}.btn-danger{background:#ff6b7a1f;border-color:#ff6b7a73;color:#ffb3bb}.btn:disabled{opacity:.55;cursor:not-allowed}.muted{color:var(--muted)}.error-banner{background:#ff6b7a1f;border:1px solid rgba(255,107,122,.4);color:#ffc2c8;padding:10px 12px;border-radius:10px;margin-bottom:12px}.split{display:grid;grid-template-columns:minmax(280px,360px) 1fr;gap:14px;min-height:calc(100vh - 120px)}@media(max-width:960px){.split{grid-template-columns:1fr}}.mail-list{overflow:auto;max-height:calc(100vh - 170px)}.mail-item{display:block;padding:12px 14px;border-bottom:1px solid var(--border);transition:background .12s ease}.mail-item:hover,.mail-item.active{background:#5b8cff1a}.mail-item .subject{font-weight:600;margin-bottom:4px;word-break:break-word}.mail-item .meta{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:8px}.badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:2px 7px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}.badge.att{color:var(--accent-2);border-color:#3dd6c666}.detail{display:flex;flex-direction:column;min-height:0;overflow:hidden}.detail-header{padding:16px 18px;border-bottom:1px solid var(--border)}.detail-header h1{margin:0 0 8px;font-size:20px;line-height:1.35;word-break:break-word}.detail-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.tabs{display:flex;gap:6px;padding:10px 12px;border-bottom:1px solid var(--border)}.tab{padding:7px 12px;border-radius:999px;border:1px solid transparent;background:transparent;color:var(--muted)}.tab.active{color:var(--text);background:#5b8cff24;border-color:#5b8cff59}.detail-body{padding:16px 18px;overflow:auto;flex:1;min-height:280px}.html-frame{width:100%;min-height:420px;border:1px solid var(--border);border-radius:10px;background:#fff}.pre-block{white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.5;margin:0}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:top;font-size:13px}.pagination{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-top:1px solid var(--border)}.settings-grid{display:grid;gap:14px;max-width:720px}.card{padding:16px 18px}.card h2{margin:0 0 10px;font-size:16px}.form-row{display:grid;gap:8px;margin-bottom:12px}.form-row label{color:var(--muted);font-size:13px}.empty{padding:40px 20px;text-align:center;color:var(--muted)}.login-wrap{min-height:100%;display:grid;place-items:center;padding:24px}.login-card{width:min(420px,100%);padding:24px}.login-card h1{margin:0 0 8px;font-size:22px}.login-card p{margin:0 0 18px;color:var(--muted)}