:root{--bg: #fafbff;--surface: #ffffff;--surface-soft: #f4f5fb;--ink: #0f0b2d;--muted: #4f5366;--faint: #8b8fa8;--indigo: #4f46e5;--indigo-soft: #818cf8;--blue: #2563eb;--blue-soft: #60a5fa;--violet: #7c3aed;--violet-soft: #a78bfa;--captcha-red: #dc2626;--grad-1: linear-gradient(120deg, #2563eb, #4f46e5, #7c3aed);--line: rgba(99, 102, 241, .1);--line-strong: rgba(99, 102, 241, .22);--shadow-sm: 0 2px 8px rgba(79, 70, 229, .06);--shadow-md: 0 8px 28px rgba(79, 70, 229, .1);--shadow-lg: 0 16px 48px rgba(79, 70, 229, .14);--btn-glow: rgba(79, 70, 229, .32);--ok-text: #047857;--ok-bg: #ecfdf5;--ok-line: #a7f3d0;--warn-text: #b45309;--warn-bg: #fffbeb;--warn-line: #fde68a;--err-text: #b91c1c;--err-bg: #fef2f2;--err-line: #fecaca;--radius-pill: 999px;--radius-card: 20px;--radius-field: 14px;--font-sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, 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