:root{--color-primary: #2563eb;--color-primary-dark: #1e3a8a;--color-primary-light: #3b82f6;--color-bg: #f8fafc;--color-card: #ffffff;--color-text: #1f2937;--color-text-secondary: #6b7280;--color-border: #e5e7eb;--radius-card: 12px;--radius-btn: 8px;--font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif}*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;min-height:100vh;font-family:var(--font-family);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}img{display:block;max-width:100%}a{color:var(--color-primary);text-decoration:none}.brand-header{display:flex;align-items:center;gap:10px;padding:16px 20px;background:var(--color-card);border-bottom:1px solid var(--color-border)}.brand-logo{width:36px;height:36px;border-radius:9px;background:var(--color-primary);color:#fff;font-size:20px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.brand-name{font-size:18px;font-weight:600;color:var(--color-text)}.share-page{min-height:100vh;display:flex;flex-direction:column}.share-content{flex:1;padding:24px 20px;display:flex;flex-direction:column;align-items:center}.preview-card{width:100%;max-width:400px;background:var(--color-card);border-radius:var(--radius-card);box-shadow:0 2px 12px #00000014;overflow:hidden}.loading{display:flex;align-items:center;justify-content:center;padding:60px 0;color:var(--color-text-secondary);font-size:14px}.loading:before{content:"";width:20px;height:20px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;margin-right:8px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}