:root{--bg:#fffdf7;--bg-alt:#fff3e0;--surface:#fff;--text:#4a4238;--text-h:#2a231b;--text-muted:#8a7f70;--border:#f0e4d2;--primary:#ff8c42;--primary-hover:#f0771f;--primary-soft:#fff0e2;--accent:#f5a623;--shadow:0 8px 24px #f497421f;--radius:16px;--radius-sm:10px;--sans:"PingFang SC", "Microsoft YaHei", system-ui, "Segoe UI", Roboto, sans-serif;font-family:var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}*{box-sizing:border-box}body.dark{--bg:#16130f;--bg-alt:#201b14;--surface:#241f18;--text:#d8d2c8;--text-h:#f4efe7;--text-muted:#9b9183;--border:#3a3228;--primary:#ff8c42;--primary-hover:#ffa05e;--primary-soft:#3a2c1d;--accent:#f5a623;--shadow:0 8px 24px #00000073}body.dark .site-header{background:#16130fe6}body{margin:0}h1,h2,h3{color:var(--text-h);margin:0;line-height:1.3}p{margin:0}a{color:inherit;text-decoration:none}.layout{flex-direction:column;min-height:100vh;display:flex}.container{width:min(1120px,100% - 40px);margin:0 auto}.site-header{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);background:#fffdf7e6;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;height:64px;display:flex}.brand{align-items:center;gap:10px;display:flex}.brand-logo{background:var(--primary);color:#fff;border-radius:12px;justify-content:center;align-items:center;width:36px;height:36px;font-size:18px;font-weight:700;display:inline-flex}.brand-name{color:var(--text-h);font-size:18px;font-weight:700}.header-nav{-webkit-overflow-scrolling:touch;scrollbar-width:none;flex-wrap:nowrap;align-items:center;gap:6px;display:flex;overflow-x:auto}.header-nav::-webkit-scrollbar{display:none}.header-right{align-items:center;gap:12px;display:flex}.settings{flex-shrink:0;position:relative}.settings-toggle{border:1px solid var(--border);background:var(--surface);color:var(--text);font-family:var(--sans);cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:8px 14px;font-size:14px;transition:background .2s,color .2s;display:inline-flex}.settings-toggle:hover{background:var(--primary-soft);color:var(--primary-hover)}.settings-menu{background:var(--surface);border:1px solid var(--border);min-width:220px;box-shadow:var(--shadow);z-index:100;border-radius:12px;padding:12px;position:absolute;top:calc(100% + 10px);right:0}.settings-row{color:var(--text);justify-content:space-between;align-items:center;gap:16px;font-size:14px;display:flex}.settings-label{font-weight:600}.switch{background:var(--border);cursor:pointer;border:none;border-radius:999px;flex-shrink:0;width:44px;height:24px;transition:background .2s;position:relative}.switch.on{background:var(--primary)}.switch-thumb{background:#fff;border-radius:50%;width:18px;height:18px;transition:left .2s;position:absolute;top:3px;left:3px}.switch.on .switch-thumb{left:23px}.nav-link{color:var(--text);border-radius:999px;flex-shrink:0;padding:8px 14px;font-size:15px;transition:background .2s,color .2s}.nav-link:hover{background:var(--primary-soft);color:var(--primary-hover)}.nav-link.active{background:var(--primary);color:#fff}.site-main{flex:1}.hero-section{background:linear-gradient(180deg, var(--bg-alt), var(--bg));text-align:center;padding:88px 0 72px}.hero-eyebrow{color:var(--primary);letter-spacing:2px;margin-bottom:12px;font-weight:600}.hero-title{letter-spacing:2px;font-size:56px;font-weight:800}.hero-subtitle{max-width:560px;color:var(--text-muted);margin:20px auto 0;font-size:17px}.hero-actions{flex-wrap:wrap;justify-content:center;gap:14px;margin-top:32px;display:flex}.btn{cursor:pointer;border:2px solid #0000;border-radius:999px;padding:12px 28px;font-family:inherit;font-size:15px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s;display:inline-block}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow)}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{color:var(--primary-hover);border-color:var(--primary);background:0 0}.btn-secondary:hover{background:var(--primary-soft)}.section{padding:72px 0}.section-alt{background:var(--bg-alt)}.section-more{text-align:center;margin-top:40px}.section-heading{text-align:center;margin-bottom:40px}.section-heading h2{font-size:32px;font-weight:800}.section-heading p{color:var(--text-muted);margin-top:8px}.video-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.video-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:transform .2s,box-shadow .2s;overflow:hidden}.video-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.video-cover{aspect-ratio:16/10;background:var(--primary-soft);justify-content:center;align-items:center;display:flex;position:relative}.video-cover img{object-fit:cover;width:100%;height:100%}.video-cover-placeholder{color:var(--primary);font-size:18px;font-weight:700}.video-duration{color:#fff;background:#000000a6;border-radius:6px;padding:3px 8px;font-size:12px;position:absolute;bottom:10px;right:10px}.video-info{padding:16px 18px 18px}.video-title{font-size:17px;font-weight:700}.video-desc{color:var(--text-muted);margin-top:6px;font-size:14px;line-height:1.5}.video-meta{color:var(--text-muted);flex-wrap:wrap;gap:12px;margin-top:12px;font-size:12px;display:flex}.page{padding:72px 0}.filter-bar{flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:40px;display:flex}.filter-chip{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:999px;padding:8px 18px;font-size:14px;transition:background .2s,color .2s,border-color .2s}.filter-chip:hover{border-color:var(--primary);color:var(--primary-hover)}.filter-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.video-footer-link{text-align:center;padding:32px 0 8px}.platform-grid{grid-template-columns:repeat(2,1fr);gap:24px;max-width:720px;margin:0 auto;display:grid}.platform-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:32px;transition:transform .2s,box-shadow .2s;display:block}.platform-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.platform-card h3{margin-bottom:10px;font-size:22px}.platform-card p{color:var(--text-muted);font-size:14px}.platform-go{background:var(--primary);color:#fff;border-radius:999px;margin-top:20px;padding:10px 24px;font-size:14px;font-weight:600;display:inline-block}.g2048-wrap{max-width:400px;margin:0 auto}.g2048-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.g2048-scores{gap:14px;display:flex}.g2048-score{color:#776e65;font-size:18px;font-weight:700}.g2048-best{color:#b7a89c}.g2048-board-wrap{position:relative}.g2048-board{background:#bbada0;border-radius:10px;grid-template-columns:repeat(4,1fr);gap:8px;padding:8px;display:grid}.g2048-cell{aspect-ratio:1;color:#776e65;background:#eee4da59;border-radius:8px;justify-content:center;align-items:center;font-size:30px;font-weight:800;display:flex}.g2048-2{background:#eee4da}.g2048-4{background:#ede0c8}.g2048-8{color:#f9f6f2;background:#f2b179}.g2048-16{color:#f9f6f2;background:#f59563}.g2048-32{color:#f9f6f2;background:#f67c5f}.g2048-64{color:#f9f6f2;background:#f65e3b}.g2048-128{color:#f9f6f2;background:#edcf72;font-size:26px}.g2048-256{color:#f9f6f2;background:#edcc61;font-size:26px}.g2048-512{color:#f9f6f2;background:#edc850;font-size:26px}.g2048-1024{color:#f9f6f2;background:#edc53f;font-size:22px}.g2048-2048{color:#f9f6f2;background:#edc22e;font-size:22px}.g2048-overlay{background:#eee4dab8;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex;position:absolute;inset:0}.g2048-overlay p{color:#776e65;font-size:26px;font-weight:800}.g2048-dpad{flex-direction:column;align-items:center;gap:8px;margin-top:18px;display:flex}.g2048-dpad-row{gap:8px;display:flex}.g2048-dpad-btn{border:1px solid var(--border);background:var(--surface);width:56px;height:56px;color:var(--text-h);cursor:pointer;border-radius:12px;font-size:18px;transition:background .2s,transform .1s}.g2048-dpad-btn:hover{background:var(--primary-soft)}.g2048-dpad-btn:active{transform:scale(.94)}.g2048-tip{text-align:center;color:var(--text-muted);margin-top:16px;font-size:14px}.snake-wrap{max-width:672px;margin:0 auto}.snake-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.snake-score{color:var(--text-h);font-size:20px;font-weight:700}.snake-actions{flex-wrap:wrap;gap:10px;display:flex}.snake-difficulty{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-bottom:14px;display:flex}.snake-difficulty-label{color:var(--text-muted);font-size:14px}.snake-diff-btn{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:999px;padding:6px 16px;font-size:14px;transition:background .15s,color .15s,border-color .15s}.snake-diff-btn:hover{border-color:var(--primary);color:var(--primary-hover)}.snake-diff-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.snake-canvas-wrap{border:3px solid #4caf50;border-radius:12px;position:relative;overflow:hidden}.snake-canvas{background:#1b5e20;width:100%;height:auto;display:block}.snake-overlay{background:#0000008c;flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex;position:absolute;inset:0}.snake-overlay p{color:#fff;font-size:24px;font-weight:700}.snake-dpad{margin-top:16px}.sokoban-wrap{max-width:720px;margin:0 auto}.sokoban-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.sokoban-score{color:var(--text-h);font-size:16px;font-weight:700}.sokoban-actions{flex-wrap:wrap;gap:10px;display:flex}.sokoban-canvas-wrap{border:3px solid #8d6e63;border-radius:12px;max-width:520px;margin:0 auto;position:relative;overflow:hidden}.sokoban-canvas{background:#f5e9d0;width:100%;height:auto;display:block}.sokoban-overlay{background:#0000008c;flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex;position:absolute;inset:0}.sokoban-overlay p{color:#fff;font-size:24px;font-weight:700}.sokoban-overlay-sub{opacity:.85;font-size:14px;font-weight:500}.sokoban-dpad{margin-top:16px}.subway-wrap{max-width:420px;margin:0 auto}.subway-hud{flex-wrap:wrap;justify-content:space-between;gap:10px;margin-bottom:12px;display:flex}.subway-hud-item{color:var(--text-h);background:var(--primary-soft);border-radius:999px;padding:6px 12px;font-size:15px;font-weight:700}.subway-canvas-wrap{border:3px solid #546e7a;border-radius:12px;position:relative;overflow:hidden}.subway-canvas{touch-action:none;background:#33383d;width:100%;height:auto;display:block}.subway-overlay{text-align:center;background:#000000b8;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:20px;display:flex;position:absolute;inset:0}.subway-overlay-title{color:#fff;font-size:30px;font-weight:800}.subway-overlay-sub{color:#ffffffd9;font-size:15px}.subway-diffs{flex-direction:column;gap:10px;width:100%;max-width:280px;margin-top:8px;display:flex}.subway-overlay-actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:8px;display:flex}.subway-controls{justify-content:center;gap:24px;margin-top:16px;display:flex}.tetris-wrap{max-width:640px;margin:0 auto}.tetris-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.tetris-stats{flex-wrap:wrap;gap:10px;display:flex}.tetris-stat{color:var(--text-h);background:var(--primary-soft);border-radius:999px;padding:6px 12px;font-size:15px;font-weight:700}.tetris-actions{flex-wrap:wrap;gap:10px;display:flex}.tetris-stage{justify-content:center;align-items:flex-start;gap:16px;display:flex}.tetris-canvas-wrap{border:3px solid #455a64;border-radius:12px;position:relative;overflow:hidden}.tetris-canvas{background:#101418;width:100%;height:auto;display:block}.tetris-overlay{background:#0009;flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex;position:absolute;inset:0}.tetris-overlay p{color:#fff;font-size:24px;font-weight:700}.tetris-overlay-sub{opacity:.85;font-size:15px;font-weight:500}.tetris-side{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-direction:column;align-items:center;gap:8px;min-width:96px;padding:14px;display:flex}.tetris-side-label{color:var(--text-h);font-size:14px;font-weight:700}.tetris-next{background:#1a2024;border-radius:8px;display:block}.tetris-side-hint{color:var(--text-muted);font-size:12px}.tetris-pad{flex-direction:column;align-items:center;gap:8px;margin-top:16px;display:flex}.tetris-drop{font-size:22px}.delta-wrap{max-width:640px;margin:0 auto}.delta-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}.delta-head{align-items:center;gap:12px;margin-bottom:16px;display:flex}.delta-badge{color:#fff;border-radius:999px;flex-shrink:0;padding:4px 12px;font-size:13px;font-weight:700}.delta-badge-win{background:#43a047}.delta-badge-lose{background:#e53935}.delta-title{font-size:22px}.delta-text{background:var(--primary-soft);border-radius:var(--radius-sm);margin-bottom:20px;padding:18px 20px}.delta-text p{color:var(--text);line-height:1.8}.delta-text p+p{margin-top:8px}.delta-choices{flex-direction:column;gap:12px;display:flex}.delta-choice{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);width:100%;color:var(--text-h);font-family:var(--sans);text-align:left;cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;font-size:15px;font-weight:600;transition:background .15s,color .15s,border-color .15s;display:flex}.delta-choice:hover{background:var(--primary-soft);color:var(--primary-hover);border-color:var(--primary)}.delta-random{color:#fff;background:var(--accent);border-radius:999px;flex-shrink:0;padding:2px 10px;font-size:12px;font-weight:700}.delta-choice-home{text-align:center;color:var(--text-muted);font-weight:500}.vault-panel{flex-direction:column;align-items:center;gap:16px;display:flex}.vault-hint{color:var(--text-muted);text-align:center;max-width:460px;font-size:14px}.vault-dials{align-items:flex-start;gap:14px;display:flex}.vault-dial{flex-direction:column;align-items:center;gap:4px;display:flex}.vault-dial.active .vault-dial-val{box-shadow:0 0 0 3px var(--accent)}.vault-dial.locked .vault-dial-val{box-shadow:0 0 0 3px #2e7d32}.vault-confirm-side{justify-content:flex-end;width:100%;max-width:460px;display:flex}.vault-confirm{border-radius:var(--radius-sm);background:var(--accent);color:#fff;min-width:120px;font-family:var(--sans);cursor:pointer;border:none;padding:14px 32px;font-size:18px;font-weight:700;transition:background .15s,transform .1s}.vault-confirm:hover:not(:disabled){background:var(--primary-hover)}.vault-confirm:active:not(:disabled){transform:scale(.97)}.vault-confirm:disabled{opacity:.5;cursor:default}.vault-dial-val{width:52px;height:60px;font-family:var(--mono,ui-monospace, monospace);border-radius:var(--radius-sm);-webkit-user-select:none;user-select:none;cursor:ns-resize;justify-content:center;align-items:center;font-size:28px;font-weight:700;transition:color .15s,background .15s,box-shadow .15s;display:flex}.vault-dial-val.correct{color:#1b5e20;background:#e8f5e9;border:2px solid #1b5e20}.vault-dial-val.wrong{color:#fff;border:2px solid var(--border);background:#3a3a3a}.vault-msg{color:var(--text-muted);font-size:14px;font-weight:700}.vault-msg-ok{color:#2e7d32}.vault-msg-err{color:#e53935}.game-controls{justify-content:center;margin-bottom:20px;display:flex}.mc-touch-stage{border-radius:var(--radius);width:100%;max-width:1000px;height:min(78vh,860px);box-shadow:var(--shadow);touch-action:none;-webkit-user-select:none;user-select:none;background:#87ceeb;border:3px solid #7cb342;margin:0 auto;position:relative;overflow:hidden}.mc-touch-canvas{touch-action:none;cursor:crosshair;width:100%;height:100%;display:block}.mc-touch-btn{z-index:2;color:#fff;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;background:#5a5a5a6b;border:2px solid #ffffff80;border-radius:50%;width:76px;height:76px;font-size:22px;font-weight:700;line-height:1;position:absolute}.mc-touch-btn:active{background:#7878789e}.mc-jump-btn{bottom:18px;right:18px}.mc-cycle-btn{width:64px;height:64px;font-size:16px;bottom:108px;right:22px}.game-panel{background:var(--surface);border-radius:var(--radius);text-align:center;border:2px solid #7cb342;max-width:720px;margin:0 auto 40px;padding:24px 32px}.game-id{color:#33691e;font-size:22px;font-weight:700}.game-history{max-width:720px;margin:0 auto}.game-history h3{text-align:center;margin-bottom:20px;font-size:22px}.history-list{margin:0;padding:0;list-style:none}.history-list li{border-bottom:1px solid var(--border);align-items:baseline;gap:16px;padding:14px 0;display:flex}.history-list li:last-child{border-bottom:none}.history-year{width:56px;color:var(--primary);flex-shrink:0;font-weight:700}.history-text{color:var(--text);line-height:1.6}.about-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-align:left;max-width:640px;margin:0 auto 48px;padding:32px}.about-text{color:var(--text);margin-bottom:16px}.about-text:last-child{margin-bottom:0}.about-brief{text-align:center;max-width:640px;color:var(--text);margin:0 auto}.feature-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:28px}.feature-card h3{margin-bottom:10px;font-size:18px}.feature-card p{color:var(--text-muted);font-size:14px}.notfound{text-align:center;padding:48px 0}.notfound-code{color:var(--primary);font-size:72px;font-weight:800}.notfound h1{margin:8px 0 12px;font-size:28px}.notfound p{color:var(--text-muted);margin-bottom:28px}.egg-overlay{z-index:999;cursor:pointer;background:#000000b8;justify-content:center;align-items:center;display:flex;position:fixed;inset:0;overflow:hidden}.egg-confetti{border-radius:2px;animation-name:egg-fall;animation-timing-function:linear;animation-iteration-count:infinite;position:absolute;top:-24px}@keyframes egg-fall{0%{opacity:1;transform:translateY(-24px)rotate(0)}to{opacity:.8;transform:translateY(110vh)rotate(720deg)}}.egg-box{z-index:1;text-align:center;background:#fff;border-radius:16px;max-width:480px;margin:0 20px;padding:40px 48px;position:relative;box-shadow:0 20px 60px #00000059}.egg-title{color:var(--primary);margin-bottom:16px;font-size:28px;font-weight:800}.egg-text{color:var(--text);margin-bottom:12px;line-height:1.7}.egg-qq{color:var(--text-muted);margin-bottom:20px;font-size:14px}.site-footer{border-top:1px solid var(--border);background:var(--bg-alt)}.page-bottom-actions{flex-wrap:wrap;justify-content:center;gap:14px;padding:36px 0 12px;display:flex}.footer-inner{text-align:center;padding:32px 0}.footer-brand{color:var(--text-h);font-weight:700}.footer-tagline{color:var(--text-muted);margin-top:4px;font-size:14px}.footer-copy{color:var(--text-muted);margin-top:12px;font-size:13px}@media (width<=900px){.video-grid,.feature-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.hero-section{padding:56px 0 48px}.hero-title{font-size:34px}.section,.page{padding:48px 0}.video-grid,.feature-grid,.platform-grid{grid-template-columns:1fr}.header-inner{flex-direction:column;gap:10px;height:auto;padding:14px 0}.header-nav{width:100%}.header-right{flex-direction:column;align-items:stretch;width:100%}.settings-toggle{align-self:flex-start}.brand-name{font-size:16px}.nav-link{padding:6px 12px;font-size:14px}}.chat-app{width:100%;max-width:480px;height:min(76vh,720px);box-shadow:var(--shadow);border:1px solid var(--border);background:#fff;border-radius:22px;flex-direction:column;margin:0 auto;display:flex;overflow:hidden}.chat-header{color:#fff;background:linear-gradient(135deg,#0ea5e9,#2563eb);flex-shrink:0;padding:16px 18px}.chat-header h1{letter-spacing:1px;margin-bottom:10px;font-size:18px}.chat-mycode{background:#ffffff29;border-radius:14px;align-items:center;gap:10px;padding:8px 12px;display:flex}.chat-label{opacity:.9;white-space:nowrap;font-size:12px}.chat-code{letter-spacing:4px;font-variant-numeric:tabular-nums;flex:1;font-size:24px;font-weight:800}.chat-copy{color:#2563eb;cursor:pointer;background:#ffffffeb;border:none;border-radius:9px;flex-shrink:0;padding:6px 12px;font-size:13px;font-weight:600}.chat-body{flex-direction:column;flex:1;display:flex;position:relative;overflow:hidden}.chat-view{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:24px 20px;display:flex}.chat-view h2{color:var(--text-h);font-size:17px}.chat-view p{color:var(--text-muted);font-size:13px;line-height:1.6}.chat-input6{letter-spacing:6px;text-align:center;border:2px solid var(--border);font-variant-numeric:tabular-nums;border-radius:12px;outline:none;width:100%;max-width:240px;padding:12px 14px;font-size:20px}.chat-input6:focus{border-color:var(--primary)}.chat-incoming{color:#fff;background:linear-gradient(135deg,#059669,#10b981);border-radius:16px;width:100%;padding:20px;animation:1.2s ease-in-out infinite chatPulse}@keyframes chatPulse{0%,to{box-shadow:0 0 #10b98159}50%{box-shadow:0 0 0 10px #10b98100}}.chat-incoming-who{letter-spacing:2px;font-size:22px;font-weight:800}.chat-incoming-tip{opacity:.9;margin:6px 0 14px;font-size:13px}.chat-incoming-row{justify-content:center;gap:10px;display:flex}.chat-incoming-row button{cursor:pointer;border:none;border-radius:10px;padding:10px 22px;font-size:14px;font-weight:700}.chat-accept{color:#059669;background:#fff}.chat-reject{color:#fff;background:#ffffff38}.chat-window{flex-direction:column;flex:1;min-height:0;display:flex}.chat-bar{background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:10px;padding:10px 14px;display:flex}.chat-bar-peer{color:var(--text);text-align:left;flex:1;font-size:14px}.chat-endbtn{color:#dc2626;cursor:pointer;background:#fee2e2;border:none;border-radius:8px;padding:6px 12px;font-size:12px;font-weight:600}.chat-msgs{background:#f8fafc;flex-direction:column;flex:1;gap:8px;min-height:0;padding:14px;display:flex;overflow-y:auto}.chat-msg{word-break:break-word;white-space:pre-wrap;text-align:left;border-radius:14px;max-width:78%;padding:9px 13px;font-size:14px;line-height:1.5}.chat-msg.mine{color:#fff;background:linear-gradient(135deg,#0ea5e9,#2563eb);border-bottom-right-radius:4px;align-self:flex-end}.chat-msg.theirs{color:var(--text-h);border:1px solid var(--border);background:#fff;border-bottom-left-radius:4px;align-self:flex-start}.chat-msg-from{opacity:.7;margin-bottom:2px;font-size:10px;display:block}.chat-inputrow{border-top:1px solid var(--border);background:#fff;flex-shrink:0;gap:8px;padding:10px;display:flex}.chat-inputrow input{letter-spacing:0;text-align:left;border:2px solid var(--border);border-radius:12px;outline:none;flex:1;min-width:0;padding:10px 12px;font-size:15px}.chat-inputrow input:focus{border-color:var(--primary)}.chat-inputrow button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#0ea5e9,#2563eb);border:none;border-radius:12px;padding:0 20px;font-size:15px;font-weight:600}.chat-inputrow .chat-file-btn{background:var(--surface-hover);color:var(--text-h);padding:0 14px}.chat-msg-text{white-space:pre-wrap}.chat-file-card{flex-direction:column;gap:4px;min-width:160px;display:flex}.chat-file-name{word-break:break-all;font-size:13px;font-weight:600}.chat-file-meta{opacity:.8;align-items:center;gap:8px;font-size:11px;display:flex}.chat-file-sent{background:#ffffff38;border-radius:6px;padding:1px 6px}.chat-file-dl{color:#2563eb;cursor:pointer;background:#fff;border:none;border-radius:8px;align-self:flex-start;margin-top:2px;padding:5px 14px;font-size:12px;font-weight:600}.chat-upload{border-top:1px solid var(--border);color:var(--text-h);background:#f1f5f9;align-items:center;gap:8px;padding:8px 10px;font-size:12px;display:flex}.chat-upload-name{text-overflow:ellipsis;white-space:nowrap;max-width:40%;overflow:hidden}.chat-upload-track{background:#e2e8f0;border-radius:3px;flex:1;height:6px;overflow:hidden}.chat-upload-fill{background:linear-gradient(90deg,#0ea5e9,#2563eb);border-radius:3px;height:100%;transition:width .15s}.chat-upload-pct{text-align:right;min-width:40px}.chat-toast{color:#fff;z-index:99;text-align:center;background:#0f2027eb;border-radius:10px;max-width:88vw;padding:10px 18px;font-size:13px;position:fixed;top:18px;left:50%;transform:translate(-50%);box-shadow:0 6px 20px #00000040}