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var(--tw-drop-shadow)}.\[al\:\65B0\6982\5FF5\82F1\8BED\(\4E00\)\]{al:新概念英语(一)}.\[mm\:ss\.xx\]{mm:ss.xx}.\[mm\:ss\]{mm:ss}.\[offset\:-200\]{offset:-200}.\[offset\:500\]{offset:500}:root{--brand-50:#e8f2ff;--brand-100:#cfe5ff;--brand-200:#9fcbff;--brand-300:#66abff;--brand-400:#2e8dff;--brand-500:#007aff;--brand-600:#0064d6;--brand-700:#004fad;--brand-800:#003b82;--brand-900:#00275a;--background-50:#ffffff;--background-100:#f7f7fa;--background-200:#f2f2f7;--background-300:#e5e5ea;--background-400:#d1d1d6;--background-500:#aeaeb2;--background-600:#8e8e93;--background-700:#3a3a3c;--background-800:#1c1c1e;--background-900:#000000;--text-50:#f5f5f7;--text-100:#e3e3e8;--text-200:#c7c7cc;--text-300:#aeaeb2;--text-400:#8e8e93;--text-500:#6e6e73;--text-600:#48484a;--text-700:#3c3c43;--text-800:#1d1d1f;--text-900:#000000;--state-success:#34c759;--state-success-dark:#30d158;--state-error:#ff3b30;--state-error-dark:#ff453a;--background:var(--background-50);--foreground:var(--text-800);--card:var(--background-50);--card-foreground:var(--text-800);--popover:var(--background-50);--popover-foreground:var(--text-900);--primary:var(--brand-500);--primary-foreground:var(--background-50);--secondary:var(--background-200);--secondary-foreground:var(--text-800);--muted:var(--background-200);--muted-foreground:var(--text-400);--accent:var(--background-100);--destructive:var(--state-error);--success:var(--state-success);--border:var(--background-300);--input:var(--background-400);--ring:var(--brand-500);--chart-3:#ff9500;--success-surface:#e9f9ee;--error-surface:#ffecea;--font-sans:"DM Sans",ui-sans-serif,system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--font-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;--radius:1.2rem;--shadow-xs:0 1px 2px 0 rgba(0,0,0,0.04);--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.05),0 1px 3px -1px rgba(0,0,0,0.05);--shadow-md:0 4px 8px -2px rgba(0,0,0,0.06),0 2px 4px -2px rgba(0,0,0,0.05);--shadow-lg:0 8px 24px -8px rgba(0,0,0,0.08),0 4px 8px -4px rgba(0,0,0,0.05);--shadow-xl:0 16px 40px -10px rgba(0,0,0,0.1),0 8px 16px -8px 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