:root{font-family:PingFang SC,Microsoft YaHei,Noto Sans CJK SC,sans-serif;color:#202737;background:#f2f4f7;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--accent: #3168eb;--border: #e5e8ef;--muted: #7a8496}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{border:0;cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid #8bb5ff;outline-offset:3px}button{transition:background-color .12s ease,color .12s ease}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.icon-button{width:36px;height:36px;display:inline-grid;place-items:center;color:#7a8496;background:transparent;border-radius:6px}.icon-button:hover{background:#edf1f7;color:#263b61}.connection{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:#7a8496;white-space:nowrap}.connection i,.live-label i,.chat-live-label i{width:6px;height:6px;border-radius:50%;background:#42c98f;flex-shrink:0}.connection-connecting i{background:#e8b35e}.connection-offline i{background:#e18383}.event-background{display:block;width:100%;height:100%;object-fit:cover;object-position:center bottom}.event-artwork{position:absolute;inset:0;overflow:hidden;isolation:isolate;container:event-artwork / size;color:#fff;background:#3155a8}.event-artwork>.event-background{position:absolute;inset:0;z-index:-1}.event-branding{position:absolute;top:clamp(16px,3cqh,52px);left:clamp(16px,3cqw,64px);right:clamp(16px,3cqw,64px);display:flex;align-items:center;justify-content:space-between;gap:16px}.event-university-mark{display:flex;align-items:center;gap:clamp(8px,1cqw,18px)}.event-original-mark{display:block;height:auto;flex-shrink:0}.event-seal{width:clamp(36px,5cqw,100px);aspect-ratio:1;clip-path:circle(49%)}.event-wordmark{width:clamp(85px,12cqw,210px)}.event-tagline{width:clamp(96px,20cqw,320px)}.event-copy{position:absolute;top:24%;left:5%;right:5%;display:flex;flex-direction:column;align-items:center;text-align:center;gap:clamp(18px,2.7cqh,54px)}.event-calligraphy{width:min(68cqw,1100px)}.event-heading{margin:0;font-family:"Noto Serif CJK SC",Songti SC,SimSun,serif;font-size:clamp(18px,3.2cqw,80px);line-height:1.4;font-weight:700;letter-spacing:.04em;text-shadow:0 2px 5px #173d8055}.event-heading span{display:block}.event-heading span+span{margin-top:.4em}.event-organizers{font-family:"Noto Serif CJK SC",Songti SC,SimSun,serif;font-size:clamp(12px,1.5cqw,28px);line-height:1.65;letter-spacing:.08em;color:#ecf4ff}.event-organizers p{margin:0}.event-organizers .event-date{margin-top:.25em;letter-spacing:.18em}@container event-artwork (max-width: 600px){.event-copy{top:26%;gap:20px}.event-calligraphy{width:86cqw}.event-heading{font-size:clamp(16px,5cqw,28px);letter-spacing:0}.event-organizers{font-size:clamp(11px,3.3cqw,16px)}}@container event-artwork (max-height: 600px) and (min-width: 600px){.event-copy{top:20%;gap:12px}.event-calligraphy{width:min(55cqw,650px)}.event-heading{font-size:clamp(18px,2.8cqw,44px)}.event-organizers{font-size:clamp(12px,1.4cqw,17px)}}@container event-artwork (max-width: 360px){.event-branding{left:12px;right:12px;gap:8px}.event-university-mark{gap:6px}.event-seal{width:32px}.event-wordmark{width:76px}.event-tagline{width:82px}}@container event-artwork (max-height: 360px) and (min-width: 600px){.event-branding{top:12px}.event-seal{width:32px}.event-wordmark{width:96px}.event-tagline{width:150px}.event-copy{top:24%;gap:8px}.event-calligraphy{width:min(45cqw,420px)}.event-heading{font-size:clamp(16px,2.4cqw,28px)}.event-heading span{display:inline}.event-organizers{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 18px;font-size:11px}.event-organizers .event-date{margin:0}}.keyboard-open .event-copy{top:24%;gap:10px}.keyboard-open .event-calligraphy{width:min(64cqw,650px)}.keyboard-open .event-organizers{display:none}.danmaku-field{position:absolute;inset:0;overflow:hidden;pointer-events:none;font-size:2.2cqw;font-weight:700;line-height:1.4;opacity:var(--dm-opacity, 1);contain:layout style}.danmaku-field.dm-large{font-size:2.8cqw}.danmaku{position:absolute;top:0;left:0;display:inline-block;white-space:nowrap;padding:.03em .12em;color:#fff;text-shadow:0 1px 2px #172947;will-change:transform}.outlined .danmaku{-webkit-text-stroke:.075em #14233c;paint-order:stroke fill;text-shadow:1px 1px 2px #081526,-1px -1px 2px #081526}.danmaku.color-gold{color:#ffe887}.danmaku.color-mint{color:#93f5c4}.danmaku.color-pink{color:#ffb6d7}.danmaku small{font-size:.46em;margin-left:.6em;vertical-align:middle;font-weight:500}.own-danmaku{outline:1px solid rgba(255,255,255,.8);outline-offset:2px}.dm-hidden{visibility:hidden}.static-danmaku{display:flex;flex-direction:column;gap:.7em;padding:1em}.static-danmaku .danmaku{position:static;white-space:normal;width:fit-content;max-width:90%;will-change:auto}.screen-mode{height:100svh;overflow:hidden;background:#1b305e}.screen-viewport{height:100%;display:grid;place-items:center}.screen-layout{width:100%;height:100%;display:grid;grid-template-columns:minmax(0,1fr) 22%;container-type:inline-size;overflow:hidden;background:#3155a8}.screen-picture{min-width:0;position:relative;display:flex;align-items:center}.screen-art{position:relative;width:100%;height:100%;container-type:inline-size}.screen-toolbar{position:absolute;bottom:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:.9cqw 1.6cqw;background:linear-gradient(transparent,#142c6059);color:#eff5ff;gap:1cqw}.screen-status{display:flex;align-items:center;gap:1cqw;white-space:nowrap}.screen-status .connection,.screen-count{color:#dce8ff;font-size:.72cqw}.screen-status .connection i,.screen-toolbar .live-label i{width:.32cqw;height:.32cqw}.screen-status .connection{gap:.35cqw}.live-label{display:inline-flex;align-items:center;gap:6px;color:#fff;font-family:Arial,sans-serif;font-size:11px;font-weight:600;letter-spacing:.04em;white-space:nowrap}.screen-toolbar .live-label{font-size:.72cqw;gap:.35cqw}.player-actions{display:flex;align-items:center;gap:3px}.player-actions button{display:grid;place-items:center;width:34px;height:34px;border-radius:4px;color:#fff;background:transparent}.player-actions button:hover{background:#ffffff26}.player-actions button[aria-pressed=false]{color:#a1b0c9}.player-actions svg{width:18px;height:18px;stroke-width:1.8}.screen-toolbar .player-actions{gap:.25cqw}.screen-toolbar .player-actions button{width:2.3cqw;height:2.3cqw;border-radius:.25cqw}.screen-toolbar .player-actions svg{width:1.15cqw;height:1.15cqw}.screen-qr-panel{background:#f8fbff;color:#17325b;display:flex;flex-direction:column;justify-content:space-between;align-items:stretch;padding:2cqw 1.7cqw 1.7cqw;border-left:1px solid rgba(255,255,255,.3)}.qr-panel-brand{display:flex;align-items:center;gap:.5cqw;font-size:1.08cqw;font-weight:700;white-space:nowrap}.qr-panel-brand>span:first-child{display:grid;place-items:center;width:1.6cqw;height:1.6cqw;background:#3155a8;color:#fff;border-radius:.35cqw;font-size:.95cqw}.qr-panel-brand .qr-live{margin-left:auto;color:#7c8da6;font-size:.65cqw;font-weight:400}.qr-panel-content{text-align:center;transform:translateY(-.5cqw)}.qr-panel-content h2{margin:0 0 .5cqw;font-size:1.75cqw;font-weight:700;letter-spacing:.03em}.qr-panel-content>p{margin:0 0 1.7cqw;color:#7b8ba2;font-size:.85cqw}.qr-paper{width:100%;max-width:min(17cqw,31svh);aspect-ratio:1;margin:0 auto;padding:.45cqw;background:#fff;border:1px solid #e2e9f4;border-radius:.5cqw;display:grid;place-items:center}.qr-paper img{display:block;width:100%;height:100%}.qr-scan-hint{font-size:.77cqw;color:#5e7393;margin-top:1.2cqw}.qr-send-link{display:inline-flex;align-items:center;gap:.2cqw;font-size:.75cqw;color:#3155a8;margin-top:1.4cqw;padding:.6cqw .8cqw;border-radius:.3cqw;background:#eaf0fd}.qr-send-link:hover{background:#dce7fb}.qr-send-link svg{width:.85cqw;height:.85cqw}.qr-panel-bottom{display:flex;flex-direction:column;align-items:center;gap:.5cqw;font-size:.63cqw;color:#8b9ab0}.qr-panel-bottom button{display:inline-flex;align-items:center;gap:.3cqw;padding:.3cqw;background:none;color:#7588a5;font-size:.65cqw}.qr-panel-bottom svg{width:.7cqw;height:.7cqw}.join-mode{height:100svh;height:var(--watch-height, 100dvh);min-height:0;overflow:hidden;background:#3155a8}.join-layout{height:100%;display:flex;flex-direction:column;min-height:0}.join-canvas{position:relative;flex:1;min-height:0;overflow:hidden;container-type:inline-size}.join-canvas .event-background{position:absolute;inset:0}.join-canvas .danmaku-field{font-size:clamp(15px,2.2cqw,38px)}.join-canvas .danmaku-field.dm-large{font-size:clamp(19px,2.8cqw,48px)}.join-canvas:fullscreen{width:100%;height:100%}.join-dock{flex-shrink:0;background:#fff;color:#556782;border-top:1px solid #dde5f2;padding-bottom:env(safe-area-inset-bottom)}.join-dock-inner{width:min(1200px,100%);margin:0 auto}.join-utility{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 20px 0}.join-utility-actions,.join-utility-right{display:flex;align-items:center;gap:18px}.join-utility button,.join-utility a{display:inline-flex;align-items:center;gap:5px;padding:3px 0;color:#7788a1;background:none;font-size:12px;white-space:nowrap}.join-utility button:hover,.join-utility a:hover{color:var(--accent)}.join-dock .composer{border:0;padding:10px 20px 5px}.join-dock .send-bar{height:46px}.join-dock .send-bar>input,.join-dock .nickname-field input{font-size:16px}.join-dock .send-button{height:38px;min-width:76px}.message-history{display:flex;flex-direction:column;max-height:min(520px,calc(100dvh - 150px))}.history-note{margin:0;padding:16px 20px 10px;color:#98a5b8;font-size:11px}.message-list{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#d8dfeb transparent;padding:6px 18px}.message-list ol{list-style:none;padding:0;margin:0}.message-list li{padding:13px 0;border-bottom:1px solid #f1f3f7}.message-list li:last-child{border-bottom:0}.message-meta{display:flex;align-items:center;gap:6px;color:#98a1b1;font-size:11px}.sender-name{max-width:65%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#8390a5}.message-meta time{margin-left:auto;font-family:ui-monospace,monospace;font-size:10px}.me-label{font-size:9px;line-height:1.4;border:1px solid #cdddff;color:#4b7ae1;padding:0 3px;border-radius:3px}.message-list p{font-size:13px;line-height:1.8;overflow-wrap:anywhere;margin:6px 0 0;color:#384357}.feed-empty{min-height:170px;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#a8b2c4;gap:12px}.feed-empty svg{color:#bec9db;stroke-width:1.3}.feed-empty strong{color:#8b98ad;font-weight:400;font-size:13px}.feed-empty p{margin:-7px 0 0;font-size:11px;color:#a4adbb}.composer{position:relative;flex-shrink:0;border-top:1px solid #edf0f5;padding:12px 14px 6px;background:#fff}.quick-messages{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;margin-bottom:10px}.quick-messages::-webkit-scrollbar{display:none}.quick-messages button{padding:5px 8px;border:1px solid #e8edf6;border-radius:4px;background:#f8faff;color:#7485a1;font-size:10px;line-height:1.4;flex-shrink:0;white-space:nowrap}.quick-messages button:hover{color:var(--accent);border-color:#bed0ff}.send-bar{display:flex;align-items:center;height:42px;padding:3px;border:1px solid #dde4ef;border-radius:5px;background:#f8f9fc}.send-bar:focus-within{border-color:#83a8ff;background:#fff;box-shadow:0 0 0 2px #eaf0ff}.send-bar.invalid{border-color:#d86f6f}.format-toggle{display:inline-grid;place-items:center;background:none;color:#7e8ca3;width:31px;height:32px;flex-shrink:0;border-radius:3px}.format-toggle:hover,.format-toggle.active{background:#edf2ff;color:var(--accent)}.send-bar>input{width:0;min-width:0;flex:1;outline:0;border:0;background:transparent;padding:0 5px;height:32px;color:#344159;font-size:12px}.send-bar>input::placeholder{color:#a3adbd}.send-button{display:inline-flex;align-items:center;justify-content:center;gap:5px;border-radius:3px;background:var(--accent);color:#fff;min-width:57px;height:34px;padding:0 9px;font-size:12px;font-weight:500}.send-button:hover:not(:disabled){background:#2457d3}.send-button:disabled{background:#e4eaf5;color:#a3b0c8}.send-button>svg{flex-shrink:0}.composer-foot{min-height:24px;display:flex;align-items:center;justify-content:space-between;gap:8px;color:#a5adbb;font-size:10px}.composer-foot>span:last-child{flex-shrink:0;font-variant-numeric:tabular-nums}.error-message{color:#cc5959}.success-message{color:#38a778}.format-panel{position:absolute;z-index:12;bottom:calc(100% - 1px);left:12px;right:12px;padding:16px;border:1px solid #dfe6f1;border-radius:8px;background:#fff;box-shadow:0 -6px 24px #24355a17}.format-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;font-size:12px;color:#475770}.format-heading button{display:flex;align-items:center;gap:3px;padding:0;background:none;color:#98a5b8;font-size:11px}.format-colors{display:flex;align-items:center;gap:16px;font-size:11px;color:#8b97a9}.color-options{display:flex;gap:14px}.color-swatch{display:inline-grid;place-items:center;width:22px;height:22px;border:1px solid #d6dfed;border-radius:4px;color:#355075;padding:0}.color-swatch.selected{outline:2px solid #6593f4;outline-offset:3px}.nickname-field{display:flex;align-items:center;gap:16px;margin-top:18px;font-size:11px;color:#8b97a9}.nickname-field span{min-width:44px}.nickname-field input{min-width:0;width:100%;border:1px solid #e0e6f0;color:#475770;border-radius:4px;padding:8px;background:#fbfcfe;font-size:11px}.nickname-field input::placeholder{color:#a6b0bf}.modal{position:fixed;inset:0;width:min(380px,calc(100vw - 32px));max-height:calc(100dvh - 48px);padding:0;border:1px solid #e2e7f0;border-radius:12px;background:#fff;color:#263b61;box-shadow:0 16px 70px #08193740}.modal::backdrop{background:#0c1a3573}.modal-heading{padding:14px 18px 12px 22px;border-bottom:1px solid #edf0f5;display:flex;align-items:center;justify-content:space-between}.modal-heading h2{font-size:16px;margin:0;font-weight:600}.settings-body{padding:22px}.settings-body fieldset{border:0;padding:0;margin:0 0 23px}.settings-body legend{font-size:12px;color:#718199;padding:0;margin-bottom:11px}.segmented{display:flex;background:#f1f4fa;padding:3px;border-radius:5px}.segmented button{flex:1;padding:8px 6px;border-radius:3px;background:none;color:#8a97aa;font-size:12px}.segmented button[aria-pressed=true]{color:var(--accent);background:#fff;box-shadow:0 1px 4px #dfe6f3}.opacity-field{display:block;margin-bottom:18px}.opacity-field>span{display:flex;justify-content:space-between;font-size:12px;color:#718199}.opacity-field output{font-family:ui-monospace,monospace;font-size:11px;color:#4b6fbd}.opacity-field input{width:100%;margin:15px 0 0;accent-color:var(--accent)}.toggle-row{padding:16px 0;border-top:1px solid #edf0f5;display:flex;align-items:center;justify-content:space-between;gap:20px}.toggle-row strong{display:block;font-size:12px;font-weight:500;color:#52647f}.toggle-row small{display:block;font-size:10px;color:#a0aabd;margin-top:6px}.toggle-row input{width:16px;height:16px;flex-shrink:0;accent-color:var(--accent)}.settings-note{border-top:1px solid #edf0f5;font-size:10px;color:#9aa6b7;padding-top:17px;margin:0;text-align:center}kbd{padding:2px 5px;font-size:10px;border:1px solid #e0e6ef;border-radius:3px;font-family:inherit}.settings-note>span{padding:0 9px}.help-content{padding:20px 22px 26px;color:#74839c;font-size:13px;line-height:1.9}.help-content>p{margin:0 0 16px}.help-content ul{padding-left:18px;margin:0 0 20px}.help-content li{padding:4px 0}.help-content>a{display:inline-flex;gap:6px;align-items:center;color:var(--accent)}.toast{position:fixed;left:50%;top:26px;transform:translate(-50%);display:flex;align-items:center;gap:8px;width:max-content;max-width:calc(100vw - 24px);z-index:100;padding:13px 18px;border-radius:8px;background:#fff;color:#315078;border:1px solid #d9e3f3;box-shadow:0 5px 30px #142c5530;font-size:12px}@media(max-width:900px){.join-utility{padding:8px 12px 0;gap:8px}.join-utility-actions,.join-utility-right{gap:12px}.join-utility button,.join-utility a,.join-utility .connection{font-size:11px}.join-dock .composer{padding:9px 12px 4px}.join-dock .send-bar{height:44px}.join-dock .send-button{height:36px;min-width:62px}.quick-messages{margin-bottom:8px}.quick-messages button{font-size:10px}.join-canvas .danmaku-field{font-size:clamp(15px,2.5cqw,26px)}.join-canvas .danmaku-field.dm-large{font-size:clamp(19px,3.1cqw,33px)}.keyboard-open .quick-messages{display:none}.keyboard-open .join-utility{padding-top:5px}}@media(max-width:359px){.join-utility-actions,.join-utility-right{gap:9px}.help-button span{display:none}.join-dock .send-button{min-width:50px;padding:0 8px}.send-button>svg{display:none}}@media(max-height:560px){.join-dock .quick-messages{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}.spin{animation:none}}