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#4B5563;--gray-700: #374151;--gray-800: #1F2937;--gray-900: #111827;--radius: 10px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(28, 25, 23, .04), 0 3px 8px rgba(28, 25, 23, .05);--shadow-lg: 0 2px 4px rgba(28, 25, 23, .04), 0 8px 20px rgba(28, 25, 23, .08), 0 16px 36px rgba(28, 25, 23, .06);--ease-out: cubic-bezier(.22, 1, .36, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, SimSun, serif;--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;--radius-lg: 16px;--radius-full: 9999px;--text-h1: 24px;--text-h2: 18px;--text-h3: 15px;--text-base: 14px;--text-sm: 13px;--text-xs: 12px;--dur-fast: .18s;--dur-base: .32s;--subject-chinese: var(--primary);--subject-math: var(--primary);--subject-english: var(--primary);--subject-physics: var(--primary);--subject-chemistry: var(--primary);--subject-biology: var(--primary);--subject-politics: var(--primary);--subject-history: var(--primary);--subject-geo: var(--primary);--subject-cs: var(--primary);--subject-music: var(--primary);--subject-art: var(--primary);--subject-health: var(--primary);--subject-pe: var(--primary);--navbar-height: 64px;--container-max: 1200px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text-2);line-height:1.6;overflow-x:clip}a{color:var(--primary);text-decoration:none}button{font-family:inherit;cursor:pointer}.container{max-width:var(--container-max);margin:0 auto;padding:0 24px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 24px;font-size:15px;font-weight:600;border-radius:var(--radius-sm);border:1px solid transparent;transition:background 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reduce){.reveal{opacity:1;transform:none;transition:none}.card:hover{transform:none}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}html.skin-switching,html.skin-switching *{transition:background-color .35s ease,border-color .35s ease,color .35s ease,box-shadow .35s ease!important}:root{--mat-face: var(--card);--mat-side: color-mix(in srgb, var(--card) 88%, var(--text-1));--mat-edge: color-mix(in srgb, var(--border) 100%, transparent);--mat-highlight: color-mix(in srgb, #fff 70%, transparent);--mat-recess: color-mix(in srgb, var(--bg) 60%, var(--text-1) 6%);--z-raise-1: 6px;--z-raise-2: 14px;--z-raise-3: 26px;--perspective: 1200px;--tilt-max: 4deg;--lit-contact: 0 1px 0 var(--mat-highlight) inset, 0 -1px 0 color-mix(in srgb, var(--text-1) 8%, transparent) inset;--lit-1: 0 1px 2px color-mix(in srgb, var(--text-1) 10%, transparent);--lit-2: 0 1px 2px color-mix(in srgb, var(--text-1) 8%, transparent), 0 6px 14px -6px color-mix(in srgb, var(--text-1) 18%, transparent);--lit-3: 0 2px 4px color-mix(in srgb, var(--text-1) 8%, transparent), 0 12px 28px -10px color-mix(in srgb, var(--text-1) 22%, transparent), 0 28px 56px -24px color-mix(in srgb, var(--text-1) 18%, transparent);--grid-line: color-mix(in srgb, var(--text-1) 6%, transparent);--grid-size: 32px;--noise-opacity: .035;--font-ui: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;--font-serif: "Songti SC", "SimSun", Georgia, serif;--ease-damp: cubic-bezier(.2, .9, .24, 1);--ease-back: cubic-bezier(.34, 1.4, .64, 1);--t-1: .16s;--t-2: .28s;--t-3: .52s;--r-box: 4px;--r-ctl: 6px;--r-pill: 999px;--holo-scan: color-mix(in srgb, var(--primary) 14%, transparent);--holo-glow: color-mix(in srgb, var(--primary) 30%, transparent)}.spatial-root{position:relative;perspective:var(--perspective);perspective-origin:50% 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