*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #f5f5f7;--bg-secondary: #ffffff;--bg-tertiary: #f0f0f2;--bg-hover: #e8e8ea;--text-primary: #1d1d1f;--text-secondary: #6e6e73;--text-tertiary: #86868b;--border-color: #d2d2d7;--accent: #6366f1;--accent-hover: #4f46e5;--accent-light: rgba(99, 102, 241, .1);--danger: #ef4444;--success: #22c55e;--warning: #f59e0b;--like-red: #f43f5e;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .12);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--nav-height: 56px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--transition: .2s ease}[data-theme=dark]{--bg-primary: #0d0d0f;--bg-secondary: #1a1a1e;--bg-tertiary: #242428;--bg-hover: #2c2c30;--text-primary: #f5f5f7;--text-secondary: #a1a1a6;--text-tertiary: #6e6e73;--border-color: #2c2c30;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .5)}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.5;transition:background var(--transition),color var(--transition);min-height:100vh}a{color:var(--accent);text-decoration:none}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit;color:inherit}input,textarea{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;outline:none}img{display:block;max-width:100%}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@keyframes heartbeat{0%{transform:scale(1)}15%{transform:scale(1.35)}30%{transform:scale(1)}45%{transform:scale(1.2)}60%{transform:scale(1)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}.heart-animation{animation:heartbeat .6s ease}.fade-in{animation:fadeIn .3s ease}.fade-in-up{animation:fadeInUp .35s ease}.container{max-width:640px;margin:0 auto;padding:0 16px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:8px 20px;background:var(--accent);color:#fff;border-radius:var(--radius-full);font-weight:500;font-size:14px;transition:all var(--transition)}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:8px 20px;background:var(--bg-tertiary);color:var(--text-primary);border-radius:var(--radius-full);font-weight:500;font-size:14px;transition:all var(--transition)}.btn-secondary:hover{background:var(--bg-hover)}.loading-spinner{width:24px;height:24px;border:2px solid var(--border-color);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite;margin:40px auto}