:root{color-scheme:light;--bg-primary: #faf9f5;--bg-secondary: #fffdf9;--bg-elevated: #fffefa;--bg-sidebar: #f5f0e8;--bg-card: var(--bg-secondary);--bg-option: #f5f0e8;--bg-option-hover: #efe9de;--bg-disabled: #efe9de;--bg-correct: #eaf3ed;--bg-correct-hover: #e0ede4;--bg-wrong: #f7ebed;--bg-wrong-hover: #f0dfe3;--text-primary: #141413;--text-secondary: #3d3d3a;--text-muted: #6c6a64;--text-sidebar: var(--text-secondary);--text-sidebar-active: var(--text-primary);--text-option: var(--text-primary);--text-correct: #286344;--text-wrong: #a0394d;--border-light: #e6dfd8;--border-strong: #d8d0c2;--border-sidebar: var(--border-light);--border-correct: #54856a;--border-wrong: #b55b6d;--accent: #a9583e;--accent-hover: #98492f;--accent-light: #f3e1d8;--accent-secondary: #bd6a4e;--accent-warn: #946219;--color-on-accent: #fffaf6;--shadow-sm: 0 1px 2px rgb(27 35 29 / 4%);--shadow-md: 0 4px 16px rgb(27 35 29 / 6%);--shadow-lg: 0 16px 48px rgb(27 35 29 / 14%);--app-wallpaper: none;--sidebar-wallpaper: none;--color-background: var(--bg-primary);--color-surface: var(--bg-secondary);--color-surface-elevated: var(--bg-elevated);--color-surface-secondary: var(--bg-option);--color-text-primary: var(--text-primary);--color-text-secondary: var(--text-secondary);--color-text-tertiary: var(--text-muted);--color-border: var(--border-light);--color-border-strong: var(--border-strong);--color-accent: var(--accent);--color-accent-hover: var(--accent-hover);--color-accent-subtle: var(--accent-light);--color-success: var(--text-correct);--color-warning: var(--accent-warn);--color-error: var(--text-wrong);--spacing-1: 4px;--spacing-2: 8px;--spacing-3: 12px;--spacing-4: 16px;--spacing-5: 20px;--spacing-6: 24px;--spacing-8: 32px;--spacing-10: 40px;--spacing-12: 48px;--spacing-16: 64px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-pill: 999px;--radius-control: var(--radius-sm);--radius-button: var(--radius-md);--radius-card: var(--radius-lg);--radius-modal: var(--radius-xl);--control-height: 44px;--font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--font-mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--font-display: "Fraunces", "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;--text-display: clamp(2rem, 4vw, 3rem);--text-large-title: clamp(1.75rem, 2.5vw, 2rem);--text-title: 1.5rem;--text-headline: 1.25rem;--text-body: 1rem;--text-callout: .875rem;--text-caption: .75rem;--text-metadata: .75rem;--weight-regular: 400;--weight-medium: 500;--weight-semibold: 600;--leading-tight: 1.25;--leading-body: 1.6;--ease-standard: cubic-bezier(.2, 0, .2, 1);--transition-fast: .15s;--transition-normal: .22s;--transition-page: .28s;--transition: var(--transition-normal) var(--ease-standard);--sidebar-width: 260px;--header-height: 56px;--practice-surface: var(--bg-secondary);--practice-surface-strong: var(--bg-elevated);--practice-surface-muted: var(--bg-option);--practice-border: var(--border-light);--practice-shadow: var(--shadow-sm);--quiz-bg-card: var(--bg-secondary);--quiz-bg-option: var(--bg-option);--quiz-bg-option-hover: var(--bg-option-hover);--quiz-bg-secondary: var(--bg-elevated);--quiz-border-light: var(--border-light);--quiz-radius-sm: var(--radius-sm);--quiz-radius-md: var(--radius-md);--sidebar-workspace-bg: var(--bg-sidebar);--sidebar-workspace-panel: var(--bg-secondary);--sidebar-workspace-panel-hover: var(--bg-option-hover);--sidebar-workspace-line: var(--border-light);--sidebar-workspace-active: var(--accent-light);--sidebar-workspace-active-line: transparent;--sidebar-workspace-icon: transparent;--sidebar-workspace-shadow: none}.dark{color-scheme:dark;--bg-primary: #191c1d;--bg-secondary: #222627;--bg-elevated: #2b3031;--bg-sidebar: #1e2223;--bg-option: #2c3132;--bg-option-hover: #373d3e;--bg-disabled: #282d2e;--bg-correct: #243b30;--bg-correct-hover: #2b4638;--bg-wrong: #412b32;--bg-wrong-hover: #4b333b;--text-primary: #e8ebe7;--text-secondary: #b4bdb7;--text-muted: #959f98;--text-correct: #9dcbae;--text-wrong: #e4a0af;--border-light: #3a4240;--border-strong: #79857d;--border-correct: #6d9f80;--border-wrong: #c1808e;--accent: #dfa0af;--accent-hover: #edb7c3;--accent-light: #3d2e34;--accent-secondary: #cea1ae;--accent-warn: #d7ba83;--color-on-accent: #2c1c22;--shadow-sm: 0 1px 2px rgb(0 0 0 / 10%);--shadow-md: 0 4px 16px rgb(0 0 0 / 16%);--shadow-lg: 0 16px 48px rgb(0 0 0 / 28%)}.donate-body{min-height:100vh;background:radial-gradient(circle at top,rgba(74,95,145,.18),transparent 38%),linear-gradient(180deg,#08111f,#0c1729 40%,#0e1b31)}.donate-shell{min-height:100vh;padding:40px 20px;display:flex;align-items:center;justify-content:center}.donate-card{width:min(100%,780px);background:linear-gradient(180deg,#0b1729cc,#0c1b30bd);border:1px solid rgba(255,255,255,.08);border-radius:28px;box-shadow:0 28px 80px #00000057,inset 0 1px #ffffff0f;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);padding:40px 36px;text-align:center}.donate-kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#c4925b1f;color:#f3c48b;font-size:.82rem;font-weight:700;letter-spacing:.02em;margin-bottom:16px;border:1px solid rgba(243,196,139,.12)}.donate-title{font-size:2rem;line-height:1.2;letter-spacing:-.02em;margin-bottom:14px;color:#f8fafc}.donate-copy.en{font-size:.93rem;color:#94a3b8e0;margin-bottom:24px}.donate-qr-frame{margin:0 auto 28px;padding:18px;width:min(100%,360px);border-radius:22px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,#0f192ad1,#0b1524d1);box-shadow:0 18px 36px #02061733}.donate-qr-image{display:block;width:100%;height:auto;max-width:300px;margin:0 auto;border-radius:var(--radius-md);aspect-ratio:1}.supporters-section{margin-top:8px;padding:24px 22px 20px;border-radius:22px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,#0f192ac7,#0b1524c7);box-shadow:0 18px 36px #0206172e;text-align:left}.supporters-kicker{display:inline-flex;align-items:center;padding:7px 12px;border-radius:999px;background:#c4925b1f;color:#f3c48b;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;margin-bottom:14px;border:1px solid rgba(243,196,139,.12)}.supporters-title{font-size:1.18rem;font-weight:700;letter-spacing:-.01em;margin-bottom:16px;color:#f8fafc}.supporters-table-wrap{overflow-x:auto}.supporters-table{width:100%;border-collapse:collapse;min-width:280px}.supporters-table thead th{padding:0 0 12px;font-size:.76rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#94a3b8eb;border-bottom:1px solid rgba(148,163,184,.16)}.supporters-table thead th:first-child,.supporters-table tbody td:first-child{text-align:left}.supporters-table thead th:last-child,.supporters-table tbody td:last-child{text-align:right}.supporters-table tbody td{padding:14px 0;font-size:.96rem;line-height:1.45;color:#e2e8f0e6;border-bottom:1px solid rgba(148,163,184,.12)}.supporters-table tbody tr:last-child td{border-bottom:none;padding-bottom:0}.supporters-table tbody td:last-child{font-weight:700;color:#f3c48b;letter-spacing:-.01em}@media(max-width:480px){.supporters-section{padding:20px 16px 18px}}@media(max-width:768px){.donate-shell{padding:24px 16px;align-items:flex-start}.donate-card{padding:28px 20px}.donate-title{font-size:1.7rem}.supporters-title{font-size:1.05rem}}@media(min-width:769px){.app-layout.landing .top-bar{display:none}}