:root{--bg: #FBFAF7;--bg-raised: #FFFFFF;--bg-sunken: #F3F1EA;--border: #E6E2D8;--border-strong: #D8D3C4;--text: #1F1E1C;--text-muted: #5B5850;--text-faint: #8A8676;--accent: #1F8181;--accent-hover: #186A6A;--accent-soft: #E4F1F1;--accent-contrast: #FFFFFF;--link: #1F8181;--danger: #C0523F;--danger-soft: #F7E9E6;--success: #2E7D4F;--warn: #B8842A;--warn-soft: #FBF1DF;--shadow-sm: 0 1px 2px rgba(31,30,28,.06);--shadow-md: 0 4px 16px rgba(31,30,28,.08);--shadow-lg: 0 12px 32px rgba(31,30,28,.12);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-pill: 999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;--font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--header-h: 68px;color-scheme:light}:root[data-theme=dark]{--bg: #17181A;--bg-raised: #1E2022;--bg-sunken: #131415;--border: #2C2E30;--border-strong: #3A3C3E;--text: #EDEBE4;--text-muted: #A8A497;--text-faint: #757269;--accent: #3FC1C0;--accent-hover: #56D2D1;--accent-soft: #1B3536;--accent-contrast: #0E1414;--link: #3FC1C0;--danger: #E28374;--danger-soft: #3A2320;--success: #6FCB93;--warn: #E3B65C;--warn-soft: #362B16;--shadow-sm: 0 1px 2px rgba(0,0,0,.35);--shadow-md: 0 4px 20px rgba(0,0,0,.45);--shadow-lg: 0 16px 40px rgba(0,0,0,.55);color-scheme:dark}@media (prefers-color-scheme: dark){:root:not([data-theme=light]):not([data-theme=dark]){--bg: #17181A;--bg-raised: #1E2022;--bg-sunken: #131415;--border: #2C2E30;--border-strong: #3A3C3E;--text: #EDEBE4;--text-muted: #A8A497;--text-faint: #757269;--accent: #3FC1C0;--accent-hover: #56D2D1;--accent-soft: #1B3536;--accent-contrast: #0E1414;--link: #3FC1C0;--danger: #E28374;--danger-soft: #3A2320;--success: #6FCB93;--warn: #E3B65C;--warn-soft: #362B16;color-scheme:dark}}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background-color .2s ease,color .2s ease}img,svg{display:block;max-width:100%}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.2;margin:0 0 .5em;color:var(--text)}h1{font-size:clamp(1.9rem,4vw,2.7rem)}h2{font-size:clamp(1.3rem,2.4vw,1.7rem)}h3{font-size:1.05rem}p{margin:0 0 1em;color:var(--text-muted)}code,pre{font-family:var(--font-mono)}.container{max-width:1180px;margin:0 auto;padding:0 20px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.skip-link{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-contrast);padding:10px 16px;border-radius:0 0 8px;z-index:200}.skip-link:focus{left:0}.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border);height:var(--header-h)}.nav-container{height:var(--header-h);display:flex;align-items:center;gap:20px}.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:1.15rem;color:var(--text);flex-shrink:0}.logo:hover{text-decoration:none}.logo .mark{width:30px;height:30px;border-radius:9px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:var(--accent-contrast);font-family:var(--font-serif);font-weight:700}.main-nav{display:flex;align-items:center;gap:20px;margin-left:auto}.main-nav a{color:var(--text-muted);font-size:.94rem;font-weight:500;white-space:nowrap}.main-nav a:hover{color:var(--text);text-decoration:none}.icon-btn{width:38px;height:38px;border-radius:var(--radius-pill);border:1px solid var(--border);background:var(--bg-raised);color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.15s ease;flex-shrink:0}.icon-btn:hover{border-color:var(--accent);color:var(--accent)}.icon-btn svg{width:18px;height:18px}.theme-toggle .sun{display:none}:root[data-theme=dark] .theme-toggle .sun{display:block}:root[data-theme=dark] .theme-toggle .moon{display:none}input[type=text],input[type=tel],input[type=number],input[type=email],input[type=password],select,textarea{font-family:var(--font-sans);font-size:.95rem;color:var(--text);background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius-sm);padding:11px 14px;outline:none;transition:border-color .15s ease,box-shadow .15s ease;width:100%}input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}label{display:block;font-size:.82rem;font-weight:600;color:var(--text-muted);margin-bottom:7px}.field{margin-bottom:16px}.field:last-child{margin-bottom:0}.field .hint{font-size:.78rem;color:var(--text-faint);margin-top:6px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);font-weight:600;font-size:.92rem;cursor:pointer;border-radius:var(--radius-pill);padding:11px 22px;border:1px solid transparent;transition:.15s ease;white-space:nowrap}.btn-primary{background:var(--accent);color:var(--accent-contrast)}.btn-primary:hover{background:var(--accent-hover);text-decoration:none}.btn-secondary{background:var(--bg-raised);color:var(--text);border-color:var(--border)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}.btn-danger{background:transparent;color:var(--danger);border-color:var(--border)}.btn-danger:hover{border-color:var(--danger)}.btn-block{width:100%}.btn-sm{padding:7px 14px;font-size:.82rem}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm)}.card-sm{padding:18px;border-radius:var(--radius-md)}.auth-wrap{min-height:calc(100vh - var(--header-h));display:flex;align-items:center;justify-content:center;padding:40px 20px}.auth-card{width:100%;max-width:400px}.auth-card h1{font-size:1.5rem;margin-bottom:.3em}.auth-card .lede{margin-bottom:24px}.auth-foot{margin-top:20px;text-align:center;font-size:.88rem;color:var(--text-muted)}.hero{padding:72px 0 48px;text-align:center}.hero .eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:6px 14px;border-radius:var(--radius-pill);margin-bottom:18px}.hero h1{max-width:760px;margin-left:auto;margin-right:auto}.hero .lede{max-width:600px;margin:0 auto 30px;font-size:1.08rem}.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin:20px 0}.feature{padding:22px}.feature .ico{width:44px;height:44px;margin-bottom:14px;border-radius:13px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}.feature h3{font-size:1.02rem}.feature p{font-size:.9rem;margin:0}.section{padding:40px 0}.notice{border-radius:var(--radius-md);padding:14px 16px;font-size:.88rem;margin-bottom:16px;border:1px solid var(--border)}.notice-danger{background:var(--danger-soft);color:var(--danger);border-color:transparent}.notice-warn{background:var(--warn-soft);color:var(--warn);border-color:transparent}.notice p{margin:0;color:inherit}.notice p+p{margin-top:.5em}.ad-slot{margin:20px 0;text-align:center}.ad-slot .ad-label{font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);margin-bottom:8px}.ad-slot ins{display:block}.ad-slot-box{border:1px dashed var(--border-strong);border-radius:var(--radius-sm);background:var(--bg-sunken);min-height:90px;display:flex;align-items:center;justify-content:center}.badge{display:inline-block;font-size:.7rem;font-weight:700;padding:3px 9px;border-radius:var(--radius-pill);background:var(--accent-soft);color:var(--accent)}.app-shell{display:flex;flex-direction:column;min-height:100vh}.app-main{flex:1;padding:24px 0 40px}.dash-grid{display:grid;grid-template-columns:260px 1fr 300px;gap:18px;align-items:start}.dash-grid .panel{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.panel-head{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px}.panel-head h2{margin:0;font-size:.95rem;font-family:var(--font-sans);font-weight:700}.panel-body{padding:12px}.account-list{list-style:none;margin:0;padding:0}.account-list li{margin-bottom:8px}.account-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;border:1px solid transparent}.account-item:hover{background:var(--bg-sunken)}.account-item.active{background:var(--accent-soft);border-color:var(--accent)}.account-item .dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0}.account-item .info{overflow:hidden}.account-item .name{font-size:.88rem;font-weight:600;color:var(--text)}.account-item .label{font-size:.75rem;color:var(--text-faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dialog-list{list-style:none;margin:0;padding:0;max-height:70vh;overflow-y:auto}.dialog-item{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:var(--radius-sm);cursor:pointer;border:1px solid transparent}.dialog-item:hover{background:var(--bg-sunken)}.dialog-item.active{background:var(--accent-soft);border-color:var(--accent)}.dialog-item .avatar{width:36px;height:36px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}.dialog-item .meta{min-width:0;flex:1}.dialog-item .name-row{display:flex;justify-content:space-between;gap:8px}.dialog-item .name{font-size:.88rem;font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dialog-item .time{font-size:.72rem;color:var(--text-faint);flex-shrink:0}.dialog-item .preview{font-size:.8rem;color:var(--text-faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.unread-pill{background:var(--accent);color:var(--accent-contrast);font-size:.68rem;font-weight:700;border-radius:var(--radius-pill);padding:1px 7px;flex-shrink:0}.message-pane{min-height:400px;max-height:75vh;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.msg-bubble{max-width:72%;padding:9px 13px;border-radius:14px;font-size:.88rem;line-height:1.45}.msg-bubble.in{align-self:flex-start;background:var(--bg-sunken);color:var(--text);border-bottom-left-radius:4px}.msg-bubble.out{align-self:flex-end;background:var(--accent-soft);color:var(--text);border-bottom-right-radius:4px}.msg-bubble .sender{font-size:.72rem;font-weight:700;color:var(--accent);margin-bottom:2px}.msg-bubble .time{font-size:.68rem;color:var(--text-faint);margin-top:4px;text-align:right}.empty-state{text-align:center;padding:60px 20px;color:var(--text-faint)}.empty-state .ico{font-size:2rem;margin-bottom:10px}.inbox-split{display:flex;min-height:460px}.inbox-split .dialog-list{width:280px;flex-shrink:0;border-right:1px solid var(--border);max-height:none;padding:10px}.inbox-split .message-col{flex:1;display:flex;flex-direction:column;min-width:0}.message-col .message-head{padding:13px 16px;border-bottom:1px solid var(--border);font-weight:700;font-size:.9rem;display:flex;align-items:center;justify-content:space-between;gap:10px}.compose-note{padding:10px 16px;border-top:1px solid var(--border);font-size:.78rem;color:var(--text-faint);background:var(--bg-sunken)}.sidebar-note{font-size:.82rem;color:var(--text-muted);padding:14px 16px}.sidebar-note strong{color:var(--text)}.unlock-wrap{min-height:calc(100vh - var(--header-h));display:flex;align-items:center;justify-content:center;padding:40px 20px}.spinner{width:16px;height:16px;border-radius:50%;border:2px solid var(--accent-soft);border-top-color:var(--accent);animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:300;padding:20px}.modal{width:100%;max-width:420px}.site-footer{border-top:1px solid var(--border);padding:24px 0;background:var(--bg-sunken)}.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:.82rem;color:var(--text-faint)}@media (max-width:960px){.dash-grid{grid-template-columns:1fr}}@media (max-width:640px){.main-nav{gap:12px}.hero{padding:48px 0 32px}}