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var(--ink-400);--color-on-brand: #FFFFFF;--text-display-size: 32px;--text-display-lh: 1.2;--text-display-weight: 800;--text-title-size: 18px;--text-title-lh: 1.3;--text-title-weight: 700;--text-body-size: 14px;--text-body-lh: 1.55;--text-body-weight: 500;--text-caption-size: 12px;--text-caption-lh: 1.4;--text-caption-weight: 600;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 20px;--radius-xl: 28px;--radius-full: 999px;--elevation-0: none;--elevation-1: 0 2px 8px rgba(123, 111, 212, .06);--elevation-2: 0 6px 20px rgba(123, 111, 212, .1);--elevation-3: 0 16px 40px rgba(123, 111, 212, .14);--motion-fast: .12s;--motion-base: .2s;--motion-slow: .4s;--easing-soft: cubic-bezier(.4, 0, .2, 1);--easing-spring: cubic-bezier(.34, 1.56, .64, 1);--purple-main: var(--color-brand);--yellow: var(--accent-warm);--text-dark: var(--color-text);--text-mid: var(--color-text-muted);--text-light: var(--color-text-faint);--radius: var(--radius-lg);--bg: #f0eff8;--bg-card: #ffffff;--purple-light: #e8e6f8;--purple-mid: #b8b0e8;--purple-dark: #4a3fa0;--shadow: 0 4px 20px rgba(123, 111, 212, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Nunito,PingFang SC,Microsoft YaHei,sans-serif;background:var(--color-bg);color:var(--text-dark);min-height:100vh;display:flex;justify-content:center}.app-shell{width:100%;max-width:480px;min-height:100vh;background:var(--color-bg);position:relative;overflow-x:hidden}.page{padding:0 0 90px;min-height:100vh}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;background:#ffffffeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--purple-light);display:flex;justify-content:space-around;align-items:center;padding:10px 0 16px;z-index:100}.nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;text-decoration:none;color:var(--text-light);font-size:var(--text-caption-size);font-weight:var(--text-caption-weight);transition:color .2s}.nav-item.active{color:var(--purple-main)}.nav-icon{width:26px;height:26px;display:flex;align-items:center;justify-content:center;border-radius:10px;transition:background .2s}.nav-item.active .nav-icon{background:var(--purple-light)}.card{border-radius:var(--radius-lg);padding:var(--space-lg)}.card--surface{background:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--elevation-1)}.card--ghost{background:transparent;border:1px solid var(--color-border);box-shadow:none}.card--feature{background:var(--color-surface);box-shadow:var(--elevation-1)}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--purple-mid);border-radius:4px}