@import "https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Noto+Sans+SC:wght@400;450;500;550;600;650;700&display=swap";:root{--bg:#f8f9f6;--surface:#fff;--surface-soft:#f1f4ef;--text:#22312b;--muted:#778178;--line:#e2e7df;--green:#3e6852;--accent:#8eae92;--glow:#d9e8d5;--error:#a9463d;--shadow:0 12px 36px #293e2c05;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--bg:#111714;--surface:#18201b;--surface-soft:#1d2921;--text:#e1e9df;--muted:#98a79b;--line:#2d3b31;--green:#b1d4b6;--accent:#7eac86;--glow:#34573a;--error:#f29b8e;--shadow:0 12px 36px #00000012;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:40px}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:Noto Sans SC,Microsoft YaHei,sans-serif;font-size:14px}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a{color:inherit;text-decoration:none}button{color:inherit}:is(button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible){outline:2px solid var(--green);outline-offset:4px}button{background:0 0;border:0}svg{flex-shrink:0}h1,h2,h3,p{margin:0}::selection{background:var(--glow)}.mono,code,pre{font-variant-numeric:tabular-nums;font-family:DM Mono,Consolas,monospace}.site-shell{max-width:1440px;margin:auto;padding:0 60px}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:30px;height:100px;display:flex}.brand{letter-spacing:2px;align-items:center;gap:12px;font-size:19px;font-weight:550;display:flex}.brand-en{letter-spacing:2.9px;color:var(--muted);margin-top:4px;font:9px DM Mono,monospace;display:block}.brand-mark{width:34px;height:38px;display:block;position:relative}.brand-mark i{border:1px solid var(--green);border-radius:50%;width:30px;height:30px;position:absolute;top:4px;left:1px}.brand-mark i:nth-child(2){width:18px;height:18px;top:10px;left:7px}.brand-mark b{background:var(--green);width:1px;height:38px;position:absolute;top:0;left:16px}.brand-mark b:after{content:"";background:var(--green);border-radius:50%;width:6px;height:6px;position:absolute;top:16px;left:-2.5px}.site-header nav{align-items:center;gap:36px;height:100%;margin-left:35px;display:flex}.site-header nav a{height:100%;color:var(--muted);align-items:center;gap:5px;font-size:13px;display:flex;position:relative}.site-header nav a.active{color:var(--text);font-weight:550}.site-header nav a.active:after{content:"";background:var(--green);height:2px;position:absolute;bottom:-1px;left:0;right:0}.header-tools{align-items:center;gap:22px;display:flex}.connection{color:var(--muted);white-space:nowrap;align-items:center;gap:8px;font-size:11px;display:flex}.connection i,.empty-caption i,.sync-state>span{background:var(--muted);border-radius:50%;width:5px;height:5px;display:inline-block}.connection.live i{background:#759778;box-shadow:0 0 0 4px #8eb19515}.icon-button{width:34px;height:34px;color:var(--muted);border-radius:50%;justify-content:center;align-items:center;display:flex;position:relative}.icon-button:hover{background:var(--surface-soft);color:var(--text)}.theme-button{border:1px solid var(--line)}.hero{grid-template-columns:1.4fr 1fr;align-items:center;gap:40px;padding:52px 0 35px;animation:.7s both arrive;display:grid}.eyebrow{color:var(--green);letter-spacing:2px;align-items:center;gap:10px;font-size:10px;display:flex}.tiny-line{background:var(--green);width:22px;height:1px}.experiment{color:var(--muted);border-left:1px solid var(--line);letter-spacing:1px;margin-left:3px;padding-left:12px;font:9px DM Mono,monospace}h1{letter-spacing:-1px;margin:15px 0 10px;font-size:36px;font-weight:500;line-height:1.5}.mobile-break{display:none}.intro{color:var(--muted);font-size:12px;line-height:1.9}.clock-label{color:var(--muted);letter-spacing:1px;align-items:center;gap:18px;margin-top:29px;font-size:10px;display:flex}.clock-label .mono{letter-spacing:0;font-size:9px}.current-time{letter-spacing:-5px;font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:-4px;font-family:DM Mono,Consolas,monospace;font-size:clamp(48px,5.9vw,79px);font-weight:400;line-height:1.35}.clock-blink{color:var(--accent);vertical-align:8px;margin-left:10px;font-size:45px;font-weight:400;animation:2s step-end infinite blink}.date-row{align-items:center;gap:24px;margin-top:3px;display:flex}.date-row .mono{letter-spacing:2px;font-size:12px}.sync-state{color:var(--muted);align-items:center;gap:6px;font-size:9px;display:flex}.sync-state>span{background:var(--accent);width:3px;height:3px}.beacon-visual{justify-content:center;align-items:center;min-height:285px;display:flex;position:relative}.orbital{background:radial-gradient(circle,var(--glow) 0%,transparent 68%);border-radius:50%;width:290px;height:290px;position:relative}.orbit{border:1px solid var(--line);border-radius:50%;position:absolute;inset:0}.o1{opacity:.8;border-style:dashed}.o2{inset:27px}.o3{opacity:.65;inset:52px}.axis{background:var(--line);opacity:.65;position:absolute}.axis-h{width:328px;height:1px;top:145px;left:-19px}.axis-v{width:1px;height:328px;top:-19px;left:145px}.target{flex-direction:column;justify-content:center;align-items:center;gap:4px;display:flex;position:absolute;inset:0}.target>span:first-child{letter-spacing:2px;color:var(--green);font-size:10px}.target strong{letter-spacing:-3px;font:60px DM Mono,monospace}.target .mono{letter-spacing:1.5px;color:var(--muted);margin-top:5px;font-size:6px}.orbit-dot{background:var(--green);width:7px;height:7px;box-shadow:0 0 0 6px var(--bg),0 0 18px var(--accent);border-radius:50%;animation:4s ease-in-out infinite breathe;position:absolute;top:40px;right:40px}.axis-label{letter-spacing:2px;white-space:nowrap;color:var(--muted);background:var(--bg);padding:0 8px;font:7px DM Mono,monospace;position:absolute;left:50%;transform:translate(-50%)}.al-top{top:-3px}.al-bottom{bottom:-3px}.identity-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:1fr 1.5fr 1.2fr 1.2fr;gap:20px;padding:22px 0;display:grid}.identity-strip>div,.identity-copy{text-align:left;border-right:1px solid var(--line);padding:0 22px 0 0}.identity-copy{border:0;padding:0}.meta-label{color:var(--muted);letter-spacing:.5px;margin-bottom:8px;font-size:9px;display:block}.identity-strip strong{font-size:12px;font-weight:500}.small{letter-spacing:-.25px;font-size:11px!important}.identity-copy>.mono{align-items:center;gap:10px;display:flex}.version-tag{background:var(--surface-soft);color:var(--green);border-radius:3px;margin-left:8px;padding:3px 5px;font:8px DM Mono,monospace}.workspace{grid-template-columns:.83fr 1.17fr;align-items:start;gap:40px;margin:38px 0 43px;animation:.8s .1s both arrive;display:grid}.section-kicker{letter-spacing:1px;color:var(--muted);justify-content:space-between;align-items:center;margin-bottom:20px;font-size:9px;display:flex}.letter-panel{padding:12px 20px 0 0}.letter-panel h2{letter-spacing:-.5px;margin-bottom:22px;font-size:24px;font-weight:500}.letter-dot{color:var(--accent);margin-left:6px}.letter-body{color:var(--muted);max-width:390px;font-size:12px;line-height:2.1}.letter-body p+p{margin-top:15px}.letter-body p:first-child{color:var(--text)}.letter-body .signature{color:var(--text);margin-top:25px}.letter-foot{border-top:1px solid var(--line);color:var(--muted);align-items:center;gap:10px;margin-top:28px;padding-top:22px;font-size:9px;display:flex}.small-orbit{border:1px solid var(--accent);border-radius:50%;width:14px;height:14px;position:relative}.small-orbit:after{content:"";background:var(--green);border-radius:50%;width:4px;height:4px;position:absolute;top:4px;left:4px}.chat-panel{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;overflow:hidden}.chat-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:21px 23px 17px;display:flex}.chat-header h2{align-items:center;gap:9px;font-size:14px;font-weight:550;display:flex}.count{background:var(--surface-soft);color:var(--muted);border-radius:4px;padding:3px 6px;font:9px DM Mono,monospace}.chat-sub{color:var(--muted);margin-top:6px;font-size:9px;display:block}.notification-dot{background:var(--green);border-radius:50%;width:4px;height:4px;position:absolute;top:5px;right:8px}.enabled{color:var(--green)}.messages-area{scrollbar-width:thin;scrollbar-color:var(--line) transparent;overscroll-behavior:contain;height:260px;overflow-y:auto}.empty-state{text-align:center;min-height:260px;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;padding:30px 20px;display:flex}.empty-symbol{width:44px;height:44px;color:var(--accent);background:var(--surface-soft);border-radius:50%;justify-content:center;align-items:center;margin-bottom:15px;display:flex}.empty-state h3{color:var(--text);margin:0 0 10px;font-size:12px;font-weight:500}.empty-state>svg{color:var(--accent);margin-bottom:18px}.empty-state p{font-size:10px;line-height:1.9}.empty-caption{letter-spacing:.5px;border:1px solid var(--line);border-radius:15px;align-items:center;gap:6px;margin-top:18px;padding:4px 9px;font-size:8px;display:flex}.empty-caption i{background:var(--accent);width:3px;height:3px}.composer{background:var(--bg);border:1px solid var(--line);border-radius:8px;margin:0 15px 12px;padding:12px 14px 10px}.composer-identity{color:var(--muted);align-items:center;gap:5px;font-size:9px;display:flex}.sender-indicator{background:var(--accent);border-radius:50%;width:4px;height:4px;margin-right:2px}.composer-identity button{color:var(--text);align-items:center;gap:4px;padding:0;font-size:9px;display:flex}.owner-link{align-items:center;gap:4px;margin-left:auto;font-size:8px;display:flex}.composer textarea{resize:vertical;width:100%;min-height:64px;color:var(--text);background:0 0;border:0;outline:none;padding:10px 0 6px;font-size:11px;line-height:1.9;display:block}.composer textarea::placeholder{color:var(--muted);opacity:.7}.composer textarea:focus-visible{outline-offset:2px}.composer-bottom{justify-content:space-between;align-items:center;gap:12px;display:flex}.composer-bottom>span{color:var(--muted);font-size:8px}.text-separator{margin:0 5px}.send-button{background:var(--text);color:var(--bg);border-radius:6px;align-items:center;gap:10px;padding:9px 13px;font-size:10px;transition:transform .15s,background .15s;display:flex}.send-button:not(:disabled):hover{background:var(--green);transform:translateY(-1px)}.chat-foot{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:10px;padding:11px 20px;font-size:8px;display:flex}.chat-foot span,.chat-foot a{align-items:center;gap:5px;display:flex}.message{border-bottom:1px solid var(--line);margin:14px 18px;padding:16px 0}.message-heading{align-items:center;gap:7px;font-size:10px;display:flex}.message-heading strong{font-weight:500}.message-avatar{background:var(--surface-soft);color:var(--green);border-radius:50%;justify-content:center;align-items:center;width:22px;height:22px;font-size:8px;display:flex}.creator .message-avatar{background:var(--green);color:var(--bg)}.claim-tag{color:var(--muted);border:1px solid var(--line);border-radius:3px;padding:2px 4px;font-size:7px}.message-seq{color:var(--muted);margin-left:auto;font:9px DM Mono,monospace}.message-content{white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 0;font-size:12px;line-height:1.9}.message-times{color:var(--muted);flex-direction:column;gap:5px;font-size:8px;display:flex}.message-times time{margin-left:6px;font-family:DM Mono,monospace;font-size:8px}.timezone-tag{margin-left:5px;font-size:7px}.message details{color:var(--muted);margin-top:8px;font-size:8px}.message details summary{cursor:pointer}.message-id{overflow-wrap:anywhere;margin-top:5px;display:block}.load-older{color:var(--green);justify-content:center;align-items:center;gap:8px;margin:auto;padding:15px;font-size:10px;display:flex}.connection-error,.send-error{color:var(--error);margin:8px 0;font-size:10px;line-height:1.7}.connection-error{padding:0 20px}.spin{animation:1.3s linear infinite spin}footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:20px;padding:24px 0 28px;font-size:9px;display:flex}.footer-brand{letter-spacing:1px;color:var(--text);font:9px DM Mono,monospace}.footer-brand span{color:var(--muted);margin-left:14px;font-size:8px}footer p{letter-spacing:1px;font-size:9px}footer>a:last-child{align-items:center;gap:4px;display:flex}.toast{z-index:20;background:var(--text);color:var(--bg);border-radius:8px;align-items:center;gap:10px;width:max-content;max-width:calc(100% - 30px);padding:13px 18px;font-size:12px;display:flex;position:fixed;bottom:30px;left:50%;transform:translate(-50%);box-shadow:0 10px 40px #0002}.toast button{color:inherit;padding:2px;display:flex}.secondary-page{min-height:calc(100vh - 180px);padding:55px 0 65px}.page-title-row{justify-content:space-between;align-items:center;gap:25px;display:flex}.outline-button{border:1px solid var(--line);background:var(--surface);white-space:nowrap;border-radius:7px;align-items:center;gap:9px;padding:12px 16px;font-size:11px;display:inline-flex}.outline-button:hover{border-color:var(--accent)}.compact{margin:15px 0;padding:8px 10px;font-size:10px}.archive-toolbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;margin:40px 0 0;padding-bottom:16px;display:flex}.filters{gap:5px;display:flex}.filters button{color:var(--muted);border-radius:5px;padding:8px 14px;font-size:11px}.filters .selected{color:var(--text);background:var(--surface-soft)}.archive-toolbar>span{color:var(--muted);font-size:10px}.archive-list{background:var(--surface);border:1px solid var(--line);border-radius:12px;max-width:920px;margin-top:24px;margin-left:auto;margin-right:auto;overflow:hidden}.archive-list .empty-state{min-height:330px}.archive-list .message{margin:0 30px;padding:24px 0}.archive-list .message:last-child{border:0}.archive-list .message-content{font-size:14px}.text-link{color:var(--green);align-items:center;gap:8px;margin-top:18px;font-size:11px;display:inline-flex}.protocol-grid{grid-template-columns:190px 1fr;gap:50px;margin-top:45px;display:grid}.protocol-grid aside{color:var(--muted);flex-direction:column;align-items:flex-start;gap:24px;height:fit-content;font-size:11px;display:flex;position:sticky;top:30px}.protocol-content{max-width:750px}.protocol-content section{border-top:1px solid var(--line);padding:28px 0 35px}.protocol-content h2{margin-bottom:18px;font-size:20px;font-weight:500}.protocol-content p,.protocol-content li{color:var(--muted);margin-bottom:15px;font-size:12px;line-height:2}.protocol-content ol{padding-left:20px}.protocol-content p code,.protocol-content li code{background:var(--surface-soft);color:var(--text);overflow-wrap:anywhere;padding:2px 4px;font-size:11px}.code-block,pre{background:var(--surface-soft);border:1px solid var(--line);border-radius:8px;padding:24px;line-height:1.8}.code-block span{color:var(--muted);letter-spacing:1px;margin-bottom:5px;font:8px DM Mono,monospace;display:block}.code-block code{overflow-wrap:anywhere;margin-bottom:20px;font-size:11px;display:block}.code-block code:last-child{margin-bottom:0}.protocol-content pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px}.protocol-content .note{margin-top:10px;font-size:10px}.protocol-content .compact{display:flex}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.site-header a:hover,.text-link:hover{color:var(--green)}@keyframes arrive{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes blink{50%{opacity:0}}@keyframes breathe{50%{box-shadow:0 0 0 7px var(--bg),0 0 20px var(--accent);opacity:.7}}@keyframes spin{to{transform:rotate(360deg)}}@media (min-width:1500px){.site-shell{padding:0 70px}.hero{padding-top:65px;padding-bottom:45px}.workspace{gap:55px;margin-top:45px}.messages-area,.empty-state{height:290px;min-height:290px}.letter-body{font-size:13px;line-height:2.1}.letter-body p+p{margin-top:18px}}@media (max-width:1100px){.site-shell{padding:0 35px}.site-header{height:85px}.hero{gap:15px}.orbital{transform:scale(.88)}h1{font-size:30px}.workspace{gap:25px}.identity-strip{grid-template-columns:1fr 1.5fr 1.2fr}.identity-copy{border-top:1px solid var(--line);grid-column:1/-1;align-items:center;gap:16px;padding-top:12px;display:flex}.identity-copy .meta-label{margin:0}.identity-strip>div:nth-child(3){border:0}.identity-strip{row-gap:15px;padding:18px 0}.letter-panel{padding-right:5px}.site-header nav{gap:25px;margin-left:0}.protocol-grid{grid-template-columns:140px 1fr;gap:25px}}@media (max-width:760px){.site-shell{padding:0 22px}.site-header{flex-wrap:wrap;gap:15px;height:78px;margin-bottom:43px;position:relative}.brand{gap:9px;font-size:17px}.brand-en{letter-spacing:2.4px;font-size:8px}.site-header nav{border-bottom:1px solid var(--line);justify-content:center;gap:45px;height:43px;position:absolute;top:78px;left:0;right:0}.site-header nav a{font-size:11px}.header-tools{gap:12px}.connection{font-size:9px}.hero{grid-template-columns:1fr;padding:36px 0 27px;position:relative}.hero-copy{z-index:1;position:relative}.eyebrow{letter-spacing:1px;font-size:8px}.experiment{font-size:7px}.hero h1{letter-spacing:-.8px;margin-top:20px;font-size:28px}.intro{font-size:11px}.clock-label{margin-top:28px}.current-time{letter-spacing:-4px;font-size:62px}.clock-blink{vertical-align:6px;font-size:36px}.date-row{gap:18px}.beacon-visual{opacity:.15;pointer-events:none;z-index:0;width:175px;height:210px;min-height:0;position:absolute;bottom:3px;right:-20px;overflow:hidden}.orbital{transform-origin:50%;flex-shrink:0;transform:scale(.72)}.target strong{font-size:58px}.target>span,.axis-label{display:none}.identity-strip{grid-template-columns:1fr 1fr;gap:18px 10px;padding:20px 0}.identity-strip>div{border:0;padding:0}.identity-strip>div:nth-child(2){grid-area:2/1/auto/-1}.identity-strip>div:nth-child(3){grid-area:1/2}.identity-copy{border:0;grid-column:1/-1;padding:0;display:block}.identity-copy .meta-label{margin-bottom:8px}.meta-label{font-size:8px}.workspace{grid-template-columns:1fr;gap:30px;margin:30px 0}.chat-panel{grid-row:1}.letter-panel{padding:12px 5px 0}.letter-body{max-width:none;font-size:12px}.letter-panel h2{font-size:24px}.letter-foot{margin-top:24px;padding-top:20px}.messages-area,.empty-state{height:260px;min-height:260px}.chat-header{padding:18px}.chat-sub{font-size:8px}.composer{margin:0 10px 10px;padding:12px}.composer textarea{font-size:12px}.chat-foot{padding:11px 12px;font-size:7px}.message{margin:10px 14px}.claim-tag{font-size:6px}.message-times,.message-times time{font-size:7px}.message-content{font-size:12px}.send-button{padding:9px 13px;font-size:11px}.composer-bottom>span{font-size:7px}.secondary-page{padding-top:35px}.secondary-page h1{font-size:28px}.page-title-row{flex-direction:column;align-items:flex-start;gap:18px}.archive-toolbar{flex-direction:column;align-items:flex-start;gap:12px;margin-top:25px}.archive-list .message{margin:0 16px}.archive-list .message-content{font-size:12px}.protocol-grid{grid-template-columns:1fr;gap:20px;margin-top:25px}.protocol-grid aside{flex-flow:wrap;gap:13px;font-size:10px;position:static}.protocol-content h2{font-size:18px}.protocol-content p{font-size:11px}.code-block,pre{padding:16px}.code-block code{font-size:10px}footer{flex-wrap:wrap;gap:15px;padding:22px 0}.footer-brand{font-size:8px}footer p{order:3;width:100%;font-size:8px}footer>a:last-child{font-size:8px}.toast{padding:12px;font-size:10px;bottom:20px}}@media (max-width:370px){.site-shell{padding:0 16px}.current-time{font-size:54px}.hero h1{font-size:25px}.connection{display:none}.site-header nav{gap:34px}.message-heading{gap:4px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}.timestamp-auto{color:var(--muted);align-items:center;gap:6px;padding:7px 0 12px;font-size:9px;line-height:1.6;display:flex}