:root{--bg: #f4f3ec;--panel: rgba(255, 255, 255, .92);--panel-strong: #ffffff;--ink: #2f2623;--muted: #6f6862;--grid: rgba(90, 84, 79, .12);--accent: #ff5600;--accent-strong: #db4900;--secondary: #74706e;--line: #e8e0d8;--danger: #ef4444;--info: #3b82f6;--success: #10b981;--shadow: 0 24px 60px rgba(53, 38, 28, .12);--radius-xl: 28px;--radius-lg: 20px;--radius-md: 14px;font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden}body{background:radial-gradient(circle at top right,rgba(255,86,0,.16),transparent 26%),radial-gradient(circle at bottom left,rgba(232,222,209,.7),transparent 30%),var(--bg)}button,input,canvas{font:inherit}.app-shell{display:grid;grid-template-columns:380px minmax(0,1fr);height:100vh;overflow:hidden}.control-panel{position:relative;z-index:2;display:flex;flex-direction:column;gap:1.4rem;padding:2rem 1.6rem;background:linear-gradient(180deg,#fffffff7,#faf7f2eb);border-right:1px solid rgba(121,106,93,.15);box-shadow:8px 0 40px #3f312614;backdrop-filter:blur(14px);min-height:0;overflow:hidden}.panel-mobile-bar,.panel-toggle-btn,.panel-close-btn,.panel-backdrop{display:none}.panel-mobile-bar{align-items:center;justify-content:space-between;gap:.75rem}.panel-mobile-title{font-size:.9rem;font-weight:800;letter-spacing:.08em;color:var(--muted)}.panel-toggle-btn,.panel-close-btn{appearance:none;border:1px solid rgba(121,106,93,.16);border-radius:999px;background:#ffffffe6;color:var(--ink);font-size:.88rem;font-weight:700;line-height:1;cursor:pointer;align-items:center;justify-content:center;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}.panel-toggle-btn:hover,.panel-close-btn:hover{transform:translateY(-1px);box-shadow:0 10px 20px #3f31261a}.panel-toggle-btn{padding:.72rem 1rem}.panel-close-btn{padding:.58rem .9rem}.panel-copy{display:flex;flex-direction:column;gap:.8rem}.eyebrow{margin:0;font-size:.78rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}.panel-copy h1{margin:0;font-size:clamp(1.9rem,2vw,2.3rem);line-height:1.05}.slider-group{display:flex;flex-direction:column;gap:.55rem;padding:1rem 1rem .95rem;background:var(--panel);border:1px solid rgba(121,106,93,.12);border-radius:var(--radius-lg);box-shadow:0 10px 24px #3f31260f}.slider-toolbar{display:flex;align-items:center;justify-content:space-between;gap:.75rem}.slider-label{display:flex;align-items:center;justify-content:space-between;gap:1rem;font-weight:700;flex:1}.lock-btn{appearance:none;border:1px solid rgba(121,106,93,.18);border-radius:999px;padding:.42rem .8rem;background:#ffffffe6;color:var(--muted);font-size:.86rem;font-weight:700;line-height:1;cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease}.lock-btn:hover{transform:translateY(-1px);border-color:#796a5d47;box-shadow:0 8px 18px #3f312614}.lock-btn.is-locked{color:#fff;background:linear-gradient(135deg,#57514d,#383330);border-color:#3833301a;box-shadow:0 10px 22px #3833302e}.lock-btn:focus-visible{outline:3px solid rgba(255,86,0,.2);outline-offset:3px}.segment-label-text{display:inline-flex;align-items:center;gap:.55rem;color:var(--ink);transition:color .18s ease}.segment-color-dot{width:.75rem;height:.75rem;border-radius:50%;background:#796a5d47;box-shadow:inset 0 0 0 1px #796a5d14;transition:background-color .18s ease,box-shadow .18s ease}.app-shell.use-segment-colors .segment-a{color:#c94c10}.app-shell.use-segment-colors .segment-b{color:#2f7cf6}.app-shell.use-segment-colors .segment-c{color:#18845c}.app-shell.use-segment-colors .segment-a .segment-color-dot{background:#ff5600;box-shadow:inset 0 0 0 1px #ff560029}.app-shell.use-segment-colors .segment-b .segment-color-dot{background:#2f7cf6;box-shadow:inset 0 0 0 1px #2f7cf629}.app-shell.use-segment-colors .segment-c .segment-color-dot{background:#18a36f;box-shadow:inset 0 0 0 1px #18a36f29}.segment-range{--range-accent: var(--accent);--range-accent-soft: rgba(255, 86, 0, .18);--range-shadow: rgba(255, 86, 0, .25)}.app-shell.use-segment-colors .segment-a-range{--range-accent: #ff5600;--range-accent-soft: rgba(255, 86, 0, .18);--range-shadow: rgba(255, 86, 0, .25)}.app-shell.use-segment-colors .segment-b-range{--range-accent: #2f7cf6;--range-accent-soft: rgba(47, 124, 246, .18);--range-shadow: rgba(47, 124, 246, .24)}.app-shell.use-segment-colors .segment-c-range{--range-accent: #18a36f;--range-accent-soft: rgba(24, 163, 111, .18);--range-shadow: rgba(24, 163, 111, .24)}input[type=range]{appearance:none;width:100%;height:8px;border-radius:999px;background:linear-gradient(90deg,var(--range-accent-soft),color-mix(in srgb,var(--range-accent) 58%,white));outline:none}input[type=range]:disabled{opacity:.48;cursor:not-allowed}input[type=range]::-webkit-slider-thumb{appearance:none;width:20px;height:20px;border:2px solid white;border-radius:50%;background:var(--range-accent);box-shadow:0 6px 14px var(--range-shadow);cursor:pointer}input[type=range]:disabled::-webkit-slider-thumb{cursor:not-allowed}input[type=range]::-moz-range-thumb{width:20px;height:20px;border:2px solid white;border-radius:50%;background:var(--range-accent);box-shadow:0 6px 14px var(--range-shadow);cursor:pointer}input[type=range]:disabled::-moz-range-thumb{cursor:not-allowed}.control-actions{display:flex;flex-direction:column;gap:.8rem;margin-top:.3rem}.toggle-card{padding:1rem 1rem .95rem;background:var(--panel);border:1px solid rgba(121,106,93,.12);border-radius:var(--radius-lg);box-shadow:0 10px 24px #3f31260f}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;cursor:pointer}.toggle-title{font-weight:700}.toggle-switch{position:relative;flex:0 0 auto;width:58px;height:32px}.toggle-switch input{position:absolute;inset:0;opacity:0;margin:0;cursor:pointer}.toggle-slider{display:block;width:100%;height:100%;border-radius:999px;background:#796a5d33;box-shadow:inset 0 0 0 1px #796a5d1f;transition:background-color .18s ease,box-shadow .18s ease}.toggle-slider:after{content:"";position:absolute;top:4px;left:4px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 6px 14px #3f31262e;transition:transform .18s ease}.toggle-switch input:checked+.toggle-slider{background:color-mix(in srgb,var(--accent) 78%,white);box-shadow:inset 0 0 0 1px #ff560026}.toggle-switch input:checked+.toggle-slider:after{transform:translate(26px)}.toggle-switch input:focus-visible+.toggle-slider{outline:3px solid rgba(255,86,0,.22);outline-offset:3px}.btn{appearance:none;border:0;border-radius:999px;padding:.9rem 1.1rem;font-weight:700;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}.btn:hover{transform:translateY(-2px)}.btn-primary{color:#fff;background:linear-gradient(135deg,var(--accent),#ff7a2f);box-shadow:0 16px 30px #ff560047}.btn-primary:hover{background:linear-gradient(135deg,var(--accent-strong),var(--accent))}.btn-secondary{color:#fff;background:linear-gradient(135deg,#7b7673,#5f5b59);box-shadow:0 14px 26px #58514d40}.stage{display:flex;flex-direction:column;min-width:0;min-height:0;padding:1.2rem;gap:1rem;overflow:hidden}.canvas-shell{position:relative;flex:1;min-height:0;overflow:hidden;border:1px solid rgba(121,106,93,.12);border-radius:var(--radius-xl);background:radial-gradient(circle at 15% 20%,rgba(255,255,255,.8),transparent 35%),linear-gradient(180deg,#ffffff94,#ffffff2e);box-shadow:var(--shadow)}.triangle-canvas{display:block;width:100%;height:100%;cursor:grab;touch-action:none}.triangle-canvas.is-grabbing{cursor:grabbing}.qr-card{display:flex;flex-direction:column;align-items:center;gap:.75rem;margin-top:auto;align-self:center;padding:1.25rem 1.25rem 1.05rem;border:1px solid rgba(121,106,93,.12);border-radius:20px;background:#ffffffd1;box-shadow:0 16px 34px #3f31261f;backdrop-filter:blur(12px)}.qr-canvas{display:block;width:208px;height:208px;border-radius:12px;background:#fff}.qr-caption{margin:0;font-size:1.05rem;font-weight:700;color:var(--ink);text-align:center}.zoom-controls{position:absolute;top:1rem;right:1rem;z-index:2;display:inline-flex;align-items:center;gap:.55rem;padding:.5rem;border:1px solid rgba(121,106,93,.15);border-radius:999px;background:#ffffffd1;box-shadow:0 12px 24px #3f312614;backdrop-filter:blur(12px);transition:opacity .18s ease,transform .18s ease}.zoom-btn{min-width:2.2rem;height:2.2rem;padding:0 .8rem;border:1px solid rgba(121,106,93,.16);border-radius:999px;background:var(--panel-strong);color:var(--ink)}.zoom-btn:hover{background:var(--accent);color:#fff}.zoom-reset{min-width:auto}.zoom-level{min-width:4.2rem;text-align:center;font-weight:700;color:var(--muted)}.feedback-overlay{position:absolute;top:1.4rem;left:50%;z-index:3;padding:.9rem 1.4rem;border:2px solid transparent;border-radius:999px;background:#fffffff0;box-shadow:0 18px 34px #3f312629;font-size:1rem;font-weight:700;white-space:nowrap;transform:translate(-50%,-12px);opacity:0;pointer-events:none;transition:opacity .22s ease,transform .22s ease;backdrop-filter:blur(10px)}.feedback-overlay.show{opacity:1;transform:translate(-50%)}.feedback-overlay.success{color:var(--success);border-color:color-mix(in srgb,var(--success) 65%,white)}.feedback-overlay.fail{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 65%,white)}@media(max-width:960px){.app-shell{grid-template-columns:1fr;position:relative}.control-panel{position:absolute;top:0;bottom:0;left:0;width:min(380px,calc(100vw - 2.4rem));padding:1.25rem 1.1rem;border-right:1px solid rgba(121,106,93,.15);box-shadow:16px 0 40px #3f312624;overflow-y:auto;transform:translate(calc(-100% - 1rem));transition:transform .24s ease}.stage{padding-top:1rem}.qr-card{display:none}.panel-mobile-bar,.panel-backdrop{display:flex}.panel-toggle-btn,.panel-close-btn{display:inline-flex}.panel-backdrop{position:absolute;inset:0;z-index:1;border:0;padding:0;background:#2f26232e;opacity:0;pointer-events:none;transition:opacity .22s ease}.app-shell.panel-open .panel-backdrop{opacity:1;pointer-events:auto}.app-shell.panel-open .control-panel{transform:translate(0)}.app-shell.panel-open .zoom-controls{opacity:0;pointer-events:none;transform:translateY(-8px)}}@media(max-width:720px){.control-panel,.stage{padding:1rem}.zoom-controls{width:fit-content;top:.8rem;right:.8rem}.canvas-shell{min-height:0}.feedback-overlay{top:1rem;font-size:.92rem;padding:.75rem 1rem}}