:root{--ink-900: #121316;--ink-800: #1a1c20;--ink-700: #23262c;--amber: #d4a373;--amber-dim: rgba(212, 163, 115, .35);--amber-faint: rgba(212, 163, 115, .14);--paper: #e8e2d6;--paper-dim: rgba(232, 226, 214, .62);--ash: #8a8a93;--watcher: #5a6472;--watcher-paper: #39414c;--seal-red-1: #7a2e2e;--seal-red-2: #a34a3a;--line: rgba(232, 226, 214, .12);--ease-ink: cubic-bezier(.22, 1, .36, 1);--dur-ink: .8s;--dur-slow: 1.1s;--font-zh: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;--font-en: "Cormorant Garamond", "Noto Serif", Georgia, serif;--font-num: ui-monospace, "SF Mono", "Noto Serif", monospace;--radius: 14px;--tabbar-h: 64px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{background:var(--ink-900)}html[data-fontscale=large]{font-size:18px}html[data-fontscale=xlarge]{font-size:20px}body{margin:0;background:var(--ink-900);color:var(--paper);font-family:var(--font-zh);line-height:1.75;min-height:100dvh;overscroll-behavior-y:none}[lang^=en] body,body.en{font-family:var(--font-en)}body:after{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:9990;opacity:.05;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E")}#app{max-width:560px;margin-inline:auto;min-height:100dvh;display:flex;flex-direction:column;position:relative}.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:calc(10px + env(safe-area-inset-top)) 18px 10px;background:#121316db;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-block-end:1px solid var(--line)}.brand{font-size:1.12rem;letter-spacing:.28em;font-weight:600}.top-actions{display:flex;gap:4px}.icon-btn{background:none;border:none;color:var(--ash);font-size:.86rem;font-family:inherit;padding:8px 10px;border-radius:8px;cursor:pointer;min-height:44px;transition:color var(--dur-ink) var(--ease-ink)}.icon-btn:hover,.icon-btn:focus-visible{color:var(--amber);outline:2px solid var(--amber-dim);outline-offset:2px}.view{flex:1;padding:20px 18px calc(var(--tabbar-h) + 28px);animation:ink-in var(--dur-ink) var(--ease-ink)}@keyframes ink-in{0%{opacity:0;filter:blur(6px);transform:translateY(8px)}to{opacity:1;filter:blur(0);transform:translateY(0)}}.tabbar{position:fixed;inset-inline:0;bottom:0;z-index:50;display:flex;max-width:560px;margin-inline:auto;background:#121316eb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-block-start:1px solid var(--line);padding-block-end:env(safe-area-inset-bottom)}.tab{flex:1;background:none;border:none;color:var(--ash);font-family:inherit;font-size:.92rem;letter-spacing:.2em;padding:18px 0 16px;cursor:pointer;min-height:var(--tabbar-h);transition:color var(--dur-ink) var(--ease-ink);position:relative}.tab.active{color:var(--amber)}.tab.active:after{content:"";position:absolute;inset-block-start:0;inset-inline:30%;block-size:2px;background:var(--amber);border-radius:2px;animation:ink-in var(--dur-ink) var(--ease-ink)}.view-title{font-size:1.35rem;letter-spacing:.32em;font-weight:600;margin:6px 0 18px;text-align:center}.muted{color:var(--ash);font-size:.9rem}.hint{color:var(--ash);font-size:.88rem}.empty-box,.empty{text-align:center;padding:56px 24px;color:var(--ash)}.empty-box h3{color:var(--paper);font-weight:600;letter-spacing:.12em;margin-block-end:8px}.loading{text-align:center;color:var(--ash);padding:40px 0;animation:ink-breathe 2.4s ease-in-out infinite}@keyframes 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8px}.seal-btn{inline-size:108px;block-size:108px;border-radius:50%;border:none;cursor:pointer;font-family:inherit;font-size:1.5rem;color:#f0e6d2f2;letter-spacing:.1em;background:radial-gradient(circle at 34% 30%,var(--seal-red-2),var(--seal-red-1) 70%);box-shadow:inset 0 3px 8px #ffffff24,inset 0 -6px 12px #0006,0 6px 22px #0000008c;position:relative;transition:transform .12s ease-out,box-shadow var(--dur-ink) var(--ease-ink),filter var(--dur-ink) var(--ease-ink)}.seal-btn:before{content:"";position:absolute;top:10px;right:10px;bottom:10px;left:10px;border-radius:50%;border:1.5px solid rgba(240,230,210,.35)}.seal-btn:disabled{filter:grayscale(.7) brightness(.62);cursor:default}.seal-btn:not(:disabled){animation:seal-breathe 3.2s ease-in-out infinite}@keyframes seal-breathe{0%,to{box-shadow:inset 0 3px 8px #ffffff24,inset 0 -6px 12px #0006,0 6px 22px #0000008c,0 0 #d4a37300}50%{box-shadow:inset 0 3px 8px #ffffff24,inset 0 -6px 12px #0006,0 6px 22px #0000008c,0 0 34px #d4a37373}}.seal-btn.pressing{transform:scale(.88)}.seal-hint{text-align:center;color:var(--ash);font-size:.84rem;min-block-size:1.6em;margin-block-start:10px}.seal-hint.ready{color:var(--amber)}.sent-fly{animation:fly-away .8s var(--ease-ink) forwards}@keyframes fly-away{to{opacity:0;transform:translateY(-120px) scale(.72);filter:blur(8px)}}.privacy-warn{color:var(--amber);font-size:.88rem;background:var(--amber-faint);border:1px solid var(--amber-dim);border-radius:10px;padding:10px 14px;margin-block:10px}.privacy-warn mark{background:transparent;color:var(--paper);text-decoration:underline wavy var(--amber);text-underline-offset:4px}.ambient-row{display:flex;align-items:center;gap:8px;margin-block-start:22px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:#1a1c2099}.ambient-row .lbl{font-size:.84rem;color:var(--ash);letter-spacing:.1em;flex:none}.ambient-modes{display:flex;gap:6px;flex:1;flex-wrap:wrap}.ambient-modes 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wax-crack{30%{transform:scale(1.12);filter:brightness(1.3)}to{transform:scale(1.35);opacity:0;filter:blur(6px)}}.envelope-line{color:var(--paper-dim);letter-spacing:.1em}.msgs{display:flex;flex-direction:column;gap:16px;margin-block:18px}.msg{position:relative;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px 16px;animation:ink-in var(--dur-slow) var(--ease-ink);max-inline-size:92%}.msg.mine{align-self:flex-end;background:#22252c}.msg.theirs{align-self:flex-start}.msg-badge{position:absolute;inset-block-start:-11px;inset-inline-start:14px;font-size:.72rem;letter-spacing:.2em;background:var(--ink-900);border:1px solid var(--amber-dim);color:var(--amber);border-radius:999px;padding:2px 12px}.msg-text{margin:0;white-space:pre-wrap;line-height:2}.msg-tabs{display:flex;gap:6px;margin-block-end:10px}.msg-tab{background:transparent;border:1px solid var(--line);color:var(--ash);border-radius:999px;font-family:inherit;font-size:.76rem;padding:5px 13px;cursor:pointer;min-height:36px}.msg-tab.active{color:var(--amber);border-color:var(--amber-dim)}.resonance-stamp{position:absolute;inset-block-start:10px;inset-inline-end:12px;max-inline-size:44%;color:var(--amber);border:1.5px solid var(--amber-dim);border-radius:6px;font-size:.78rem;letter-spacing:.06em;padding:5px 10px;opacity:.55;transform:rotate(-8deg);pointer-events:none;background:#12131659}.msg.watcher{background:linear-gradient(170deg,var(--watcher-paper),#313844);border-color:#8a8a9366;align-self:stretch;max-inline-size:100%}.watcher-stamp{display:inline-block;border:1.5px solid rgba(232,226,214,.65);color:var(--paper);border-radius:6px;font-size:.8rem;letter-spacing:.3em;padding:4px 14px 4px 18px;margin-block-end:12px;transform:rotate(-3deg)}.watcher-foot{margin-block:14px 0;font-size:.78rem;color:#e8e2d6a8;border-block-start:1px dashed rgba(232,226,214,.25);padding-block-start:10px}.resonance-line{color:var(--ash);font-size:.9rem;margin-block-end:4px}.resonance-line em{color:var(--amber);font-style:normal}.trust-line{color:var(--paper-dim);font-size:.88rem;letter-spacing:.06em;margin-block-end:16px}.reply-box{margin-block-start:8px}.reply-box textarea{min-block-size:130px}.reply-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-block-start:10px}.counter{font-size:.84rem;color:var(--ash)}.counter.ready{color:var(--amber)}.thread-action{margin-block:6px 4px}.optin-waiting{color:var(--ash);font-size:.9rem;border:1px dashed var(--line);border-radius:var(--radius);padding:14px 16px;text-align:center}.unlocked-banner{border:1px solid var(--amber-dim);background:var(--amber-faint);color:var(--amber);border-radius:var(--radius);padding:14px 16px;text-align:center;margin-block-end:12px;animation:ink-in var(--dur-slow) 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