:root{color-scheme:dark;--color-bg-app:#0F1115;--color-surface-card:#171A21;--color-surface-sunken:#0B0D11;--color-surface-input:#171A21;--color-surface-hover:#232833;--color-text-display:#F9FAFB;--color-text-heading:#F5F5F5;--color-text-body:#D1D5DB;--color-text-secondary:#9CA3AF;--color-text-muted:color-mix(in srgb,#9CA3AF 60%,#6B7280);--color-primary:#818CF8;--color-primary-hover:#A5B4FC;--color-primary-container:#312E81;--color-on-primary-container:#A5B4FC;--color-action-primary:#4F46E5;--color-action-primary-hover:#4338CA;--color-text-on-primary:#F9FAFB;--color-focus-ring:color-mix(in srgb,#818CF8 65%,transparent);--color-scrim:color-mix(in srgb,#0B0D11 72%,transparent);--color-success-fg:color-mix(in srgb,#5C7A52 55%,#FFFFFF);--color-success-bg:color-mix(in srgb,#5C7A52 22%,#0F1115);--color-warning-fg:color-mix(in srgb,#B08544 55%,#FFFFFF);--color-warning-bg:color-mix(in srgb,#B08544 22%,#0F1115);--color-danger-fg:color-mix(in srgb,#A8584F 55%,#FFFFFF);--color-danger-bg:color-mix(in srgb,#A8584F 22%,#0F1115);--color-info-fg:color-mix(in srgb,#5B7184 55%,#FFFFFF);--color-info-bg:color-mix(in srgb,#5B7184 22%,#0F1115);--color-shadow:#000000;--color-border-subtle:#232833;--color-border-default:#333A48;--color-border-control:color-mix(in srgb,#9CA3AF 55%,#232833);--color-border-brand:#4F46E5;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--font-serif:"Songti TC","STSong","Noto Serif CJK TC",serif;--font-mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;--size-flow-node:64px;--size-flow-step:160px;--font-sans:"PingFang TC","Microsoft JhengHei","Noto Sans CJK TC",system-ui,sans-serif;--fs-h1:1.875rem;--fs-h2:1.4375rem;--fs-h3:1.125rem;--fs-lg:1rem;--fs-base:0.9375rem;--fs-sm:0.8125rem;--fs-xs:0.75rem;--fw-regular:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--lh-tight:1.2;--lh-snug:1.4;--lh-normal:1.6;--ls-heading:0.04em;--ls-body:0.01em;--ls-wordmark:0.08em;--fs-brand:2.5rem;--ls-label:0.06em;--container-auth:440px;--container-toast:480px;--container-narrow:520px;--container-form:720px;--container-content:760px;--container-wide:1180px;--layout-bottom-nav-height:64px;--layout-sidebar-width:216px;--layout-sidebar-width-rail:72px;--focus-ring:0 0 0 3px var(--color-focus-ring);--border-width-hairline:1px;--border-width-thick:2px;--border-width-accent:3px;--radius-xs:4px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-pill:999px;--radius-round:50%;--shadow-xs:0 1px 2px color-mix(in srgb,var(--color-shadow) 5%,transparent);--shadow-sm:0 2px 6px color-mix(in srgb,var(--color-shadow) 6%,transparent);--shadow-md:0 6px 20px color-mix(in srgb,var(--color-shadow) 8%,transparent);--shadow-lg:0 16px 44px color-mix(in srgb,var(--color-shadow) 12%,transparent);--shadow-nav:0 -4px 18px color-mix(in srgb,var(--color-shadow) 6%,transparent);--ease-standard:cubic-bezier(0.4,0.0,0.2,1);--ease-out:cubic-bezier(0.16,1,0.3,1);--dur-fast:120ms;--dur-base:180ms;--control-height-sm:36px;--control-height-md:44px;--control-height-lg:52px;--opacity-disabled:0.55;--opacity-muted:0.7;--size-icon-sm:16px;--size-icon-md:20px;--size-icon-lg:24px;--size-avatar-sm:32px;--size-draft-photo:280px;--size-draft-messages:360px;--size-media-preview:160px;--size-media-preview-compact:96px;--size-brand-mark:48px;--size-brand-mark-medium:64px;--size-brand-mark-large:80px;--blur-surface:12px;--size-avatar-md:40px;--z-raised:1;--z-dropdown:200;--z-sticky:800;--z-nav:900;--z-overlay:1000;--z-toast:1100;color-scheme:light;--color-bg-app:#F4EEE0;--color-surface-card:#FAF6EC;--color-surface-sunken:#ECE3D0;--color-surface-input:#FDFBF6;--color-surface-hover:#ECE3D0;--color-text-display:#221F1A;--color-text-heading:#2C2823;--color-text-body:#4A443B;--color-text-secondary:#6F685B;--color-text-muted:#776F60;--color-primary:#846835;--color-primary-hover:#72582C;--color-primary-container:#F3ECDB;--color-on-primary-container:#72582C;--color-action-primary:#221F1A;--color-action-primary-hover:#4A443B;--color-text-on-primary:#F6F1E7;--color-focus-ring:color-mix(in srgb,#BE9C57 40%,transparent);--color-scrim:color-mix(in srgb,#221F1A 48%,transparent);--color-success-fg:#49633F;--color-success-bg:#E7EEDF;--color-warning-fg:#7B5A27;--color-warning-bg:#F6ECD7;--color-danger-fg:#92473F;--color-danger-bg:#F2E2DE;--color-info-fg:#4C6173;--color-info-bg:#E4EAEF;--color-shadow:#2B2722;--color-border-subtle:#E7DECC;--color-border-default:#D8CCB2;--color-border-control:#A89B80;--color-border-brand:#BE9C57;--ls-wordmark:0.14em;--container-wide:100%;--container-form:980px}*,:after,:before{box-sizing:border-box}body,html{margin:0;height:100%;font-family:var(--font-sans);font-size:var(--fs-base);font-weight:var(--fw-regular);line-height:var(--lh-normal);color:var(--color-text-body);background-color:var(--color-bg-app);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3,h4{font-family:var(--font-serif);color:var(--color-text-heading);font-weight:var(--fw-medium);letter-spacing:var(--ls-heading);line-height:var(--lh-tight);margin:0}p{margin:0}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-hover)}::placeholder{color:var(--color-text-muted)}:focus-visible{outline:none;box-shadow:var(--focus-ring)}.message-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-6)}.message-page--inline{min-height:100%}.message-page__panel{width:100%;max-width:var(--container-narrow);text-align:center}.message-page__title{margin:0;color:var(--color-text-heading);font-family:var(--font-serif);font-size:var(--fs-h2);font-weight:var(--fw-medium);line-height:var(--lh-tight)}.message-page__description{margin:var(--space-3) 0 var(--space-6);color:var(--color-text-secondary);font-size:var(--fs-base);line-height:var(--lh-normal)}.message-page__actions{display:flex;gap:var(--space-3);justify-content:center;flex-wrap:wrap}.message-page__action{min-height:var(--control-height-md);padding:0 var(--space-5);display:inline-flex;align-items:center;border:var(--border-width-hairline) solid var(--color-primary);border-radius:var(--radius-md);cursor:pointer;font-family:var(--font-sans);font-size:var(--fs-sm);font-weight:var(--fw-semibold);text-decoration:none}.message-page__action--primary{background:var(--color-action-primary);border-color:var(--color-action-primary);color:var(--color-text-on-primary);box-shadow:var(--shadow-sm)}.message-page__action--primary:hover{background:var(--color-action-primary-hover);border-color:var(--color-action-primary-hover)}.message-page__action:focus-visible{box-shadow:var(--focus-ring)}.message-page__action--secondary{background:transparent;color:var(--color-primary)}