:root{color-scheme:light;--bg: #f5f6f7;--panel: #ffffff;--panel-soft: #f2f4f6;--panel-raised: #fafbfc;--input-bg: #ffffff;--topbar: #ffffff;--text: #171a1f;--muted: #69717d;--line: #e1e5ea;--accent: #0f766e;--accent-strong: #0b5f59;--accent-text: #ffffff;--accent-soft: #edf7f6;--accent-line: #b9dad6;--info: #2563eb;--info-soft: #eff5ff;--amber: #b86b10;--red: #c2413f;--red-soft: #fff3f2;--error-bg: #fff7f6;--error-line: #efc9c6;--tag-bg: #eef1f4;--segment-bg: #eef1f4;--button-hover-line: #cbd3dc;--brand-mark-bg: #171a1f;--brand-mark-line: #ffffff;--mail-text: #24282f;--toast-bg: #171a1f;--toast-text: #ffffff;--focus-ring: rgba(23, 107, 91, .12);--active-shadow: 0 1px 2px rgba(25, 33, 30, .09);--overlay-shadow: -20px 0 50px rgba(25, 33, 30, .14);--shadow: 0 1px 3px rgba(27, 42, 57, .1);--topbar-shadow: 0 1px 0 rgba(18, 30, 27, .04);--radius: 8px;font-family:Inter,Segoe UI,PingFang SC,Microsoft YaHei,Arial,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #0f1216;--panel: #15191f;--panel-soft: #1c222a;--panel-raised: #181d24;--input-bg: #101419;--topbar: #15191f;--text: #e8edf2;--muted: #9aa4b2;--line: #29313b;--accent: #2dd4bf;--accent-strong: #5eead4;--accent-text: #082f2a;--accent-soft: #122c2b;--accent-line: #25645d;--info: #93c5fd;--info-soft: #16243a;--amber: #e4a85c;--red: #f07d7d;--red-soft: #3b2022;--error-bg: #2b1719;--error-line: #6d3338;--tag-bg: #26302b;--segment-bg: #111614;--button-hover-line: #415048;--brand-mark-bg: #44b39d;--brand-mark-line: #10201d;--mail-text: #dce4df;--toast-bg: #e7ece8;--toast-text: #111614;--focus-ring: rgba(68, 179, 157, .18);--active-shadow: 0 1px 2px rgba(0, 0, 0, .28);--overlay-shadow: -20px 0 50px rgba(0, 0, 0, .32);--shadow: 0 1px 4px rgba(0, 0, 0, .32);--topbar-shadow: 0 1px 0 rgba(255, 255, 255, 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var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);padding:24px}.login-head{margin-bottom:24px;display:flex;align-items:center;justify-content:space-between;gap:14px}.login-box h1{margin:0 0 8px;font-size:24px;line-height:1.2}.login-box p{margin:0 0 18px;color:var(--muted);font-size:14px;line-height:1.6}.shell{min-height:100vh;display:grid;grid-template-rows:54px 1fr}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 18px;border-bottom:1px solid var(--line);background:var(--topbar);box-shadow:var(--topbar-shadow);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:10px;min-width:0}.mark{width:28px;height:28px;border-radius:7px;background:var(--brand-mark-bg);position:relative;flex:0 0 auto;box-shadow:inset 0 0 0 1px 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.admin-login{grid-template-columns:1fr}.admin-mail-grid{grid-template-columns:1fr;min-height:auto}.admin-mail-list{max-height:360px;border-right:0;border-bottom:1px solid var(--line)}.compose,.detail-head,.mail-body{padding:16px}.attachments{margin:0 16px 16px}.detail-meta{display:grid;gap:5px}.message{padding:13px 12px}.message-head{display:none}.inbox .message{grid-template-columns:minmax(0,1fr) auto;gap:4px 10px}.inbox .message .sender{grid-column:1;grid-row:1}.inbox .message-main{grid-column:1 / -1;grid-row:2}.inbox .message>.time{grid-column:2;grid-row:1}.mobile-tabs{height:52px;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);background:var(--panel);position:sticky;bottom:0;z-index:30}.mobile-tabs button{background:var(--panel);color:var(--muted);display:grid;place-items:center;align-content:center;gap:2px;font-size:13px;border-top:3px solid transparent}.tab-icon{width:16px;height:16px;stroke-width:2}.mobile-tabs button.active{background:var(--accent-soft);border-top-color:var(--accent);color:var(--accent);font-weight:700}.error-bar{bottom:64px}}