.theme-switch{display:inline-flex;align-items:center;gap:var(--space-4);padding:var(--space-2) var(--space-2) var(--space-2) var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-pill)}.theme-switch__trigger{min-width:var(--tap-target-min);min-height:var(--tap-target-min);display:inline-flex;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-4) var(--space-2) var(--space-2);border-radius:var(--radius-pill);transition:background-color var(--duration-base) var(--easing-standard)}@media(hover:hover)and (pointer:fine){.theme-switch__trigger:hover{background:var(--color-surface-raised)}}.theme-switch__trigger:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.theme-switch__chip{width:28px;height:28px;border:1px solid var(--color-border);border-radius:var(--radius-pill);transition:box-shadow var(--duration-theme) var(--easing-standard);box-shadow:0 0 0 3px var(--hero-glow)}.theme-switch__body{display:flex;flex-direction:column;align-items:flex-start;min-width:5.5em;text-align:left}.theme-switch__label{color:var(--color-text);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);line-height:var(--line-height-tight)}.theme-switch__hint{color:var(--color-text-tertiary);font-size:var(--font-size-xs);line-height:var(--line-height-tight);white-space:nowrap}.theme-switch__arrow{width:8px;height:8px;margin-left:var(--space-1);border-top:2px solid var(--color-text-secondary);border-right:2px solid var(--color-text-secondary);transform:rotate(45deg);transition:transform var(--duration-base) var(--easing-standard)}@media(hover:hover)and (pointer:fine){.theme-switch__trigger:hover .theme-switch__arrow{transform:rotate(45deg) translate(2px,-2px)}}.theme-switch__options{display:flex;gap:var(--space-2);padding-right:var(--space-3);border-left:1px solid 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.theme-switch__option-fill{opacity:.85}}@media(max-width:767px){.theme-switch{flex-direction:column;align-items:stretch;gap:var(--space-2);padding:var(--space-2);border-radius:var(--radius-lg)}.theme-switch__trigger{justify-content:flex-start}.theme-switch__options{justify-content:center;padding:var(--space-2) 0 0;border-top:1px solid var(--color-border);border-left:none}}@media(min-width:3200px){.theme-switch{gap:var(--space-6);padding:var(--space-3) var(--space-3) var(--space-3) var(--space-6)}.theme-switch__chip{width:40px;height:40px}.theme-switch__option{min-width:var(--tap-target-min-tv);min-height:var(--tap-target-min-tv)}.theme-switch__option-fill{width:28px;height:28px}}.app-nav__trigger{position:fixed;top:0;right:0;z-index:var(--z-sticky);display:flex;align-items:center;justify-content:center;width:min(16.67vw,80px);height:min(16.67vw,80px);margin-top:env(safe-area-inset-top,0px);margin-right:env(safe-area-inset-right,0px);background:var(--color-bg);border:none;cursor:pointer;transition:background-color var(--duration-base) var(--easing-standard)}@media(hover:hover)and (pointer:fine){.app-nav__trigger:hover{background:var(--color-primary)}}.app-nav__trigger:focus-visible{outline:2px solid var(--color-primary);outline-offset:-4px}.app-nav__trigger-box{position:relative;display:block;width:56.25%;height:28px}.app-nav__line{position:absolute;right:0;height:2px;background:var(--color-text);transition:background-color var(--duration-base) var(--easing-standard)}.app-nav__line:nth-child(1){top:0;width:38.88%}.app-nav__line:nth-child(2){top:50%;width:100%;transform:translateY(-50%)}.app-nav__line:nth-child(3){bottom:0;width:66.66%}@media(hover:hover)and (pointer:fine){.app-nav__trigger:hover .app-nav__line{background:var(--color-on-primary)}}.app-nav__backdrop{position:fixed;inset:0;z-index:var(--z-overlay);background:#0009;opacity:0;transition:opacity var(--duration-slow) var(--easing-standard)}.app-nav__backdrop.is-visible{opacity:1}.app-nav__panel{position:fixed;inset:0;z-index:var(--z-modal);visibility:hidden;pointer-events:none;transition:visibility 0s linear var(--duration-slow)}.app-nav__panel.is-open{visibility:visible;pointer-events:auto;transition-delay:0s}.app-nav__close{position:fixed;top:0;right:0;z-index:1;width:min(16.67vw,80px);height:min(16.67vw,80px);margin-top:env(safe-area-inset-top,0px);margin-right:env(safe-area-inset-right,0px);background:var(--color-primary);border:none;cursor:pointer}.app-nav__close:before,.app-nav__close:after{content:"";position:absolute;top:50%;left:50%;width:50%;height:3px;background:var(--color-on-primary);transition:transform var(--duration-slow) var(--easing-standard)}.app-nav__close:before{transform:translate(-50%,-50%) rotate(45deg)}.app-nav__close:after{transform:translate(-50%,-50%) rotate(-45deg)}@media(hover:hover)and (pointer:fine){.app-nav__close:hover:before{transform:translate(-50%,-50%) rotate(25deg)}.app-nav__close:hover:after{transform:translate(-50%,-50%) rotate(-25deg)}}.app-nav__inner{transform:translate(100%);transition:transform var(--duration-slow) var(--easing-drawer);position:absolute;top:0;right:0;display:flex;flex-direction:column;width:min(88%,480px);height:100%;padding:calc(var(--space-16) + env(safe-area-inset-top,0px)) var(--space-8) calc(var(--space-16) + env(safe-area-inset-bottom,0px));overflow-y:auto;background:var(--color-bg);border-left:1px solid var(--color-border)}.app-nav__content{margin-block:auto}.app-nav__panel.is-open .app-nav__inner{transform:translate(0)}.app-nav__list{display:flex;flex-direction:column;gap:var(--space-5)}.app-nav__item{opacity:0;transform:translate(var(--space-6));transition:opacity var(--duration-slow) var(--easing-drawer),transform var(--duration-slow) var(--easing-drawer)}.app-nav__panel.is-open 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var(--space-6)}.app-footer__link{color:var(--color-text-secondary);font-size:var(--font-size-sm)}@media(hover:hover)and (pointer:fine){.app-footer__link:hover{color:var(--color-text)}}.app-footer__copyright{color:var(--color-text-tertiary);font-size:var(--font-size-xs)}@media(min-width:768px){.app-footer__inner{flex-direction:row;align-items:center;justify-content:space-between;flex-wrap:wrap}.app-footer__copyright{flex-basis:100%}}@media(min-width:1024px){.app-footer__copyright{flex-basis:auto;order:3}}.dev-bar{position:fixed;right:var(--space-4);bottom:calc(var(--space-4) + env(safe-area-inset-bottom,0px));z-index:var(--z-toast);display:flex;flex-wrap:wrap;gap:var(--space-3);max-width:min(90vw,460px);padding:var(--space-2) var(--space-3);background:#000000bf;border:1px solid var(--color-border);border-radius:var(--radius-pill);color:var(--color-text-secondary);font-family:var(--font-family-mono);font-size:var(--font-size-xs)}.float-video__trigger{min-width:var(--tap-target-min);min-height:var(--tap-target-min);bottom:calc(env(safe-area-inset-bottom,0px) + var(--space-4));right:calc(env(safe-area-inset-right,0px) + var(--space-4));position:fixed;z-index:var(--z-sticky);display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);color:var(--color-primary);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);background:var(--color-surface);border:1px solid var(--color-primary);border-radius:var(--radius-pill);box-shadow:var(--shadow-md);transition:color var(--duration-base) var(--easing-standard),background-color var(--duration-base) var(--easing-standard)}@media(hover:hover)and (pointer:fine){.float-video__trigger:hover{color:var(--color-on-primary);background-color:var(--color-primary)}}.float-video__trigger-icon{font-size:var(--font-size-xs)}.float-video__panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);position:fixed;left:50%;transform:translate(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + var(--space-16));width:min(92vw,324px,(100vh - 200px) * 27 / 56);z-index:var(--z-overlay);display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow-lg)}@media(min-width:1024px){.float-video__panel.is-landscape{width:min(80vw,850px)}}.float-video__head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-bottom:1px solid 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clamp(24px, 4vw, 64px)}:root{--font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--font-family-mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: clamp(1.75rem, 2.5vw, 2.5rem);--font-size-3xl: clamp(2.25rem, 4vw, 4rem);--font-size-display: clamp(3rem, 6vw, 7rem);--line-height-tight: 1.2;--line-height-base: 1.6;--font-weight-regular: 400;--font-weight-medium: 500;--font-weight-bold: 700}:root{--radius-sm: 4px;--radius-md: 8px;--radius-lg: 16px;--radius-xl: 24px;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .24);--shadow-md: 0 4px 16px rgba(0, 0, 0, .32);--shadow-lg: 0 12px 40px rgba(0, 0, 0, .44);--z-base: 0;--z-sticky: 100;--z-overlay: 200;--z-modal: 300;--z-toast: 400;--duration-fast: .12s;--duration-base: 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rgba(245, 241, 230, .72);--color-text-tertiary: rgba(245, 241, 230, .48);--color-primary: #d4af37;--color-primary-hover: #e8c65b;--color-primary-active: #b8952c;--color-accent-contrast: #f0d877;--color-on-primary: #1a1400;--hero-glow: rgba(212, 175, 55, .24);--hero-tint: rgba(10, 9, 6, .9)}[data-theme=felt]{--color-bg: #05100b;--color-surface: #0b1a13;--color-surface-raised: #12261c;--color-border: rgba(63, 217, 138, .18);--color-text: #eaf2ed;--color-text-secondary: rgba(234, 242, 237, .72);--color-text-tertiary: rgba(234, 242, 237, .46);--color-primary: #1b9c5a;--color-primary-hover: #27b96d;--color-primary-active: #157a46;--color-accent-contrast: #3fd98a;--color-on-primary: #04140c;--hero-glow: rgba(27, 156, 90, .26);--hero-tint: rgba(5, 16, 11, .9)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;font-size:16px;scroll-behavior:smooth;scrollbar-gutter:stable}body{margin:0;font-family:var(--font-family-base);font-size:var(--font-size-base);line-height:var(--line-height-base);color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}*{-webkit-tap-highlight-color:transparent}h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}ul,ol{margin:0;padding:0;list-style:none}img,picture,video,canvas,svg{display:block;max-width:100%}img{height:auto}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:none;border:none;padding:0}a{color:var(--color-primary);text-decoration:none}@media(hover:hover)and 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