:root{--primary: #ff7a59;--primary-light: #ff9d82;--primary-dark: #e85d3f;--bg: #fff8f4;--card: #ffffff;--text: #3a3a3a;--text-light: #8a8a8a;--border: #ffe8de;--success: #34c759;--warn: #ff9500;--shadow: 0 4px 16px rgba(255, 122, 89, .12);--radius: 14px;--max-width: 480px}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none}a{color:var(--primary);text-decoration:none}.app-wrap{max-width:var(--max-width);margin:0 auto;min-height:100vh;background:var(--bg);position:relative;padding-bottom:64px;box-shadow:0 0 30px #0000000a}.page{padding:16px}.page-title{font-size:20px;font-weight:700;color:var(--text);margin-bottom:16px}.topbar{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;padding:16px;border-radius:0 0 20px 20px;box-shadow:var(--shadow)}.topbar h1{font-size:18px;font-weight:700}.topbar .sub{font-size:12px;opacity:.85;margin-top:2px}.card{background:var(--card);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:12px}.card-title{font-size:15px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:6px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 20px;border-radius:999px;font-size:15px;font-weight:600;background:var(--primary);color:#fff;transition:transform .1s,opacity .2s}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5}.btn-block{width:100%}.btn-lg{padding:14px 24px;font-size:16px}.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}.btn-success{background:var(--success)}.btn-danger{background:#ff3b30}.input{width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;background:#fff;color:var(--text);outline:none;transition:border-color .2s}.input:focus{border-color:var(--primary)}.input-group{margin-bottom:14px}.input-group label{display:block;font-size:13px;color:var(--text-light);margin-bottom:6px}.tabbar{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:var(--max-width);height:60px;background:#fff;display:flex;border-top:1px solid var(--border);z-index:100}.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#a39990;font-size:11px;gap:2px;text-decoration:none}.tabbar a.active{color:var(--primary)}.tabbar .icon{font-size:20px}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:12px}.stat{background:var(--card);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow);text-align:center}.stat .num{font-size:24px;font-weight:700;color:var(--primary)}.stat .label{font-size:12px;color:var(--text-light);margin-top:2px}.progress-ring{position:relative;width:90px;height:90px}.progress-ring svg{transform:rotate(-90deg)}.progress-ring .pct{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:var(--primary)}.word-card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:12px;text-align:center}.word-card .text{font-size:64px;font-weight:700;color:var(--text);line-height:1.2;margin:8px 0}.word-card .pinyin{font-size:18px;color:var(--primary);letter-spacing:1px}.word-card .meaning{font-size:14px;color:var(--text-light);margin-top:8px}.word-card .meta{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:10px}.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;background:#fff1ec;color:var(--primary)}.tag-gray{background:#f0f0f0;color:var(--text-light)}.word-card .words{margin-top:10px;font-size:18px;font-weight:600;color:var(--text)}.word-card .sentence{margin-top:10px;padding:10px;background:#fff7f3;border-radius:8px;font-size:14px;color:var(--text)}.icon-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;border-radius:999px;background:var(--primary);color:#fff;font-size:13px}.action-row{display:flex;gap:10px;margin-top:14px}.action-row .btn{flex:1}.empty{text-align:center;padding:40px 20px;color:var(--text-light)}.empty .emoji{font-size:48px;margin-bottom:8px}.badge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.badge-item{text-align:center;padding:14px 8px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}.badge-item .icon{font-size:40px}.badge-item .name{font-size:12px;margin-top:4px}.badge-item.locked{filter:grayscale(1);opacity:.4}.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}.calendar .wk{text-align:center;font-size:11px;color:var(--text-light);padding:4px 0}.calendar .cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:13px;background:#fafafa}.calendar .cell.has{background:var(--primary);color:#fff;font-weight:700}.calendar .cell.today{outline:2px solid var(--primary)}.point-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border)}.point-row:last-child{border-bottom:none}.point-row .desc{font-size:14px}.point-row .time{font-size:11px;color:var(--text-light)}.point-row .amt{font-weight:700;color:var(--primary)}.point-row .amt.neg{color:#ff3b30}.pick-list .pick{display:flex;align-items:center;justify-content:space-between;padding:14px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:10px}.pick-list .pick .left .t{font-weight:600}.pick-list .pick .left .s{font-size:12px;color:var(--text-light)}.section-title{display:flex;align-items:center;gap:6px;padding:8px 0 4px;font-size:14px;font-weight:600;color:var(--text-light);cursor:pointer;-webkit-user-select:none;user-select:none;border:none;background:none;width:100%;text-align:left}.section-title .arrow{display:inline-block;transition:transform .2s;font-size:12px}.section-title .arrow.open{transform:rotate(90deg)}.section-collapsible{overflow:hidden;transition:max-height .3s ease}.section-collapsible.collapsed{max-height:0!important}.loading{text-align:center;padding:40px;color:var(--text-light)}.toast{position:fixed;top:20px;left:50%;transform:translate(-50%);background:#000000c7;color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;z-index:9999;animation:toast-in .2s}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(-10px)}}.auth-wrap{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;background:linear-gradient(160deg,var(--primary),var(--primary-light))}.auth-card{width:100%;max-width:360px;background:#fff;border-radius:20px;padding:28px 22px;box-shadow:0 12px 40px #0000002e}.auth-card h2{text-align:center;margin-bottom:6px;color:var(--primary)}.auth-card .tip{text-align:center;font-size:12px;color:var(--text-light);margin-bottom:20px}.auth-card .switch{text-align:center;margin-top:16px;font-size:13px;color:var(--text-light)}.grade-tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px;margin-bottom:12px}.grade-tabs button{flex-shrink:0;padding:6px 14px;border-radius:999px;background:#fff;border:1.5px solid var(--border);font-size:13px;color:var(--text-light)}.grade-tabs button.active{background:var(--primary);color:#fff;border-color:var(--primary)}