:root{--color-primary: #3b66c4;--color-primary-light: #6b8fd4;--color-primary-bg: rgba(59, 102, 196, .1);--color-accent-gold: #ffcc33;--bg-page: #eef2f8;--bg-card: #ffffff;--bg-input: #f5f7fb;--text-primary: #1a1a1a;--text-secondary: #7d7d7d;--text-tertiary: #a0a0a0;--text-dark: #2e2e2e;--color-up: #51a353;--color-down: #bb4241;--border-color: #e8ecf2;--shadow-card: 0 2px 12px rgba(59, 102, 196, .06);--header-height: 56px;--tabbar-height: 56px;--max-width: 1200px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-pill: 22px;--max-mobile: 430px;--font-xs: 11px;--font-sm: 12px;--font-md: 13px;--font-base: 14px;--font-lg: 16px;--font-xl: 20px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-page);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}input,select{font-family:inherit;outline:none;border:none}.text-up{color:var(--color-up)}.text-down{color:var(--color-down)}.text-secondary{color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:var(--radius-md);font-size:14px;font-weight:600;transition:opacity .2s}.btn-primary{background:var(--color-primary);color:#fff}.btn-outline{background:#fff;border:1px solid var(--color-primary);color:var(--color-primary)}.btn-sm{padding:6px 14px;font-size:13px}.btn-block{width:100%}.card{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-card)}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section-title{font-size:18px;font-weight:600;margin-bottom:16px}.btn-buy{background:var(--color-up);color:#fff}.btn-sell{background:var(--color-down);color:#fff}