:root{--ink:#fff;--purple:#3510a6;--violet:#7c3cff;--orange:#ff9100}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#16054a;color:var(--ink);font-family:"MiSans","Microsoft YaHei",Arial,sans-serif}.stage-shell{position:relative;display:grid;place-items:center;min-height:100vh;padding:3.5rem 1.5rem 5.5rem;overflow:hidden}.slide-deck{position:relative;width:min(100%,1280px);aspect-ratio:16/9;overflow:hidden;border-radius:4px;background:radial-gradient(ellipse at 50% 45%,#8d64ff 0%,#7134ec 28%,transparent 52%),radial-gradient(ellipse at 50% 104%,#ce7dff 0%,#6a15c9 23%,transparent 44%),linear-gradient(135deg,#2d0c9b,#5612c9 53%,#28089b);box-shadow:0 30px 80px #0700208c}.slide-deck:after{content:"";position:absolute;inset:auto -8% -24% -8%;height:46%;background:radial-gradient(ellipse at 30% 38%,#df8dff 0 4%,#f5c5ff 13%,transparent 38%),radial-gradient(ellipse at 70% 75%,#8a0ac1 0 12%,transparent 37%);filter:blur(11px);opacity:.7;pointer-events:none}.brand-lockup{position:absolute;z-index:2;top:2.7%;right:2.1%;display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:clamp(.42rem,.8vw,.75rem);letter-spacing:-.04em}.brand-csia{color:#fff;font-size:1.25em;font-style:italic}.brand-aisse{font-size:1.6em;font-style:italic;color:#fff;text-shadow:2px 0 #5530d8,-1px -1px #fff}.brand-caption{font-size:.83em;max-width:14rem}.slide{position:absolute;z-index:1;inset:0;display:none;padding:7.1% 7.8%;animation:enter .35s ease}.slide.active{display:block}@keyframes enter{from{opacity:0;transform:translateX(1.2%)}to{opacity:1;transform:none}}.slide-cover{text-align:center;padding-top:12.3%}.eyebrow{margin:0 0 2.3rem;font-size:clamp(.7rem,1.25vw,1.2rem);letter-spacing:.28em;color:#ded2ff}.slide-cover h1{margin:0;font-size:clamp(2rem,5vw,4.7rem);letter-spacing:.02em}.cover-subtitle{margin:4.2rem 0 0;font-size:clamp(1.1rem,2.55vw,2.45rem)}.presenter-name{margin-top:10.5%;font-size:clamp(.85rem,1.7vw,1.6rem)}.slide-section{padding-top:17%}.slide-kicker{font-size:1.3rem;color:#ffc160;letter-spacing:.2em}.slide-section h2{max-width:75%;font-size:clamp(2rem,5.1vw,5.2rem);margin:.25em 0}.slide-section p{max-width:55%;font-size:clamp(1rem,1.8vw,1.7rem);line-height:1.8}.slide-header{display:flex;align-items:center;gap:12px;position:relative;z-index:2}.slide-header span{width:8px;height:38px;background:var(--orange)}.slide-header h2{margin:0;font-size:clamp(1.35rem,2.4vw,2.35rem)}.content-canvas{position:relative;z-index:2;height:83%;margin-top:2.2%;border-radius:22px;background:#fff;color:#4324a5;display:grid;place-items:center}.content-placeholder{padding:2rem;font-size:clamp(.85rem,1.55vw,1.45rem);color:#8678ad;border:2px dashed #d4cdea;border-radius:12px}.slide-thanks{text-align:center;padding-top:22%}.slide-thanks h2{margin:0;font-size:clamp(3rem,8vw,7.5rem);letter-spacing:.04em}.slide-thanks div{height:4px;width:42%;background:#fff;margin:.4rem auto 1rem}.slide-thanks p{font-size:clamp(.8rem,1.5vw,1.4rem)}.controls{position:absolute;z-index:3;bottom:1.25rem;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:.8rem;width:min(86vw,680px)}.nav-button,#copy-join{border:1px solid #ffffff70;background:#ffffff1a;color:#fff;border-radius:9px;cursor:pointer}.nav-button{width:38px;height:34px;font-size:1.25rem}.progress{display:flex;justify-content:center;gap:.55rem;flex:1}.progress button{width:10px;height:10px;padding:0;border:0;border-radius:50%;background:#ffffff55;cursor:pointer}.progress button.active{background:#fff;transform:scale(1.35)}#page-count{min-width:3.5rem;text-align:center;font-size:.8rem}.room-launcher{position:fixed;z-index:5;top:1.25rem;left:1.25rem;padding:.55rem .75rem;border:1px solid #ffffff70;background:#1a075acc;color:#fff;border-radius:10px;cursor:pointer;backdrop-filter:blur(8px)}.room-panel{position:fixed;z-index:6;top:3.9rem;left:1.25rem;width:190px;min-width:160px;min-height:230px;padding:0 14px 14px;background:#1a075ae8;border:1px solid #ffffff42;border-radius:14px;backdrop-filter:blur(8px);font-size:.78rem;resize:both;overflow:auto;box-shadow:0 12px 35px #08002473}.room-panel:not(.is-open){display:none}.room-panel p{margin:.2rem 0 .55rem;line-height:1.45}.room-panel strong{display:block;margin-top:.3rem;font-size:1.15rem;letter-spacing:.12em}.room-panel img{display:block;width:min(100%,154px);margin:.75rem auto;background:#fff;padding:6px}.room-panel button{padding:.45rem .6rem;font-size:.75rem}.room-drag-handle{display:flex;align-items:center;justify-content:space-between;margin:0 -14px .45rem;padding:10px 12px 8px;color:#d9ccff;cursor:move;user-select:none;border-bottom:1px solid #ffffff25}.room-drag-handle button{border:0;background:transparent;color:#fff;font-size:1.25rem;padding:0;cursor:pointer}.room-panel #copy-join{width:100%;border:1px solid #ffffff70;background:#ffffff1a;color:#fff;border-radius:8px;cursor:pointer}.audience-only{display:none}.viewer-badge{position:fixed;z-index:4;top:1rem;left:50%;transform:translateX(-50%);padding:.4rem .7rem;border-radius:999px;background:#ffffff25;font-size:.75rem}.audience .presenter-only{display:none}.audience .audience-only{display:block}@media(max-width:720px){.stage-shell{padding:0 0 4.4rem}.slide-deck{width:100vw;border-radius:0}.room-panel{resize:none}.slide{padding:7%}.controls{bottom:.8rem;width:92vw}.brand-lockup{right:3%}}