:root{--navy-900: #16305c;--navy-700: #24507f;--brand: #2e6be6;--brand-dark: #1e56c9;--brand-soft: #e8f0fe;--brand-line: #c9dbfb;--orange: #ff7a1a;--green: #16a34a;--green-soft: #e9f9ef;--green-line: #b7e8c8;--red: #dc2626;--red-soft: #fdecec;--red-line: #f7c9c9;--amber: #d97706;--amber-soft: #fff6e6;--amber-line: #fbdfae;--purple: #7c4dff;--purple-soft: #f1ecff;--page: #eef2f8;--card: #ffffff;--card-soft: #f5f7fb;--text-1: #0f1e37;--text-2: #5a6b85;--text-3: #93a1b8;--line: #dce3ed;--line-soft: #eaeff6;--r-sm: 10px;--r-md: 14px;--r-lg: 18px;--r-pill: 999px;--shadow-card: 0 1px 2px rgba(16, 35, 66, .04), 0 6px 18px rgba(16, 35, 66, .05);--shadow-float: 0 8px 28px rgba(16, 35, 66, .14);--font: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--nav-h: 56px;--tab-h: 62px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0}body{font-family:var(--font);color:var(--text-1);background:#dfe5ee;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}button{font-family:inherit;font-size:inherit;color:inherit;border:none;background:none;cursor:pointer;padding:0}input,textarea{font-family:inherit;font-size:inherit;color:inherit}img{display:block;max-width:100%}.phone{max-width:430px;min-height:100vh;min-height:100dvh;margin:0 auto;background:var(--page);position:relative;display:flex;flex-direction:column;box-shadow:0 0 0 1px #1023420f,0 24px 60px #1023421f}.scroll{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}.scroll.has-tab{padding-bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 12px)}.navbar{height:var(--nav-h);display:flex;align-items:center;gap:12px;padding:0 14px;background:var(--page);position:sticky;top:0;z-index:20;flex:none}.navbar .nav-title{flex:1;text-align:center;font-size:17px;font-weight:600}.nav-btn{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;color:var(--text-1)}.nav-btn:active{background:#1023420f}.tabbar{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:430px;height:calc(var(--tab-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:flex;background:#fffffff5;backdrop-filter:blur(12px);border-top:1px solid var(--line-soft);z-index:30}.tabbar .tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;color:var(--text-3)}.tabbar .tab.active{color:var(--brand)}.tabbar .tab.active .tab-pill{background:var(--brand);color:#fff}.tab-pill{width:46px;height:28px;border-radius:var(--r-pill);display:grid;place-items:center;color:var(--text-3);transition:background .18s,color .18s}.sec{padding:0 16px;margin-bottom:18px}.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}.sec-title{font-size:17px;font-weight:600;letter-spacing:-.01em}.sec-extra{font-size:12.5px;color:var(--text-3)}.card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow-card)}.card-pad{padding:16px}.muted{color:var(--text-2)}.tiny{font-size:12.5px;color:var(--text-3)}.tag{display:inline-block;font-size:11.5px;font-weight:600;padding:2px 8px;border-radius:6px;line-height:1.7;white-space:nowrap}.tag-single{background:var(--brand-soft);color:var(--brand)}.tag-multiple{background:var(--purple-soft);color:var(--purple)}.tag-judge{background:var(--green-soft);color:var(--green)}.tag-wrong{background:var(--red-soft);color:var(--red)}.tag-gray{background:#f0f3f8;color:var(--text-2)}.btn{height:48px;border-radius:var(--r-md);display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15.5px;font-weight:600;transition:transform .08s,background .18s}.btn:active{transform:scale(.985)}.btn-primary{background:var(--brand);color:#fff}.btn-white{background:#fff;color:var(--navy-900)}.btn-ghost{background:var(--card-soft);color:var(--text-1);border:1px solid var(--line)}.btn-outline{background:#fff;color:var(--brand);border:1.5px solid var(--brand-line)}.btn-sm{height:38px;font-size:14px;border-radius:var(--r-sm)}.btn-block{width:100%}.btn[disabled]{opacity:.45;pointer-events:none}.bar{height:6px;border-radius:var(--r-pill);background:#ffffff38;overflow:hidden}.bar>i{display:block;height:100%;border-radius:inherit;background:#fff;transition:width .3s}.bar.dark{background:#e3eaf4}.bar.dark>i{background:var(--brand)}.row{display:flex;align-items:center;gap:12px;padding:13px 16px}.row+.row{border-top:1px solid var(--line-soft)}.row .row-main{flex:1;min-width:0}.row .row-title{font-size:14.5px;font-weight:500}.row-value{color:var(--brand);font-size:14px;font-weight:600}.divider{height:1px;background:var(--line-soft)}.empty{padding:56px 24px;text-align:center;color:var(--text-3);font-size:14px}.empty .em-icon{width:56px;height:56px;border-radius:18px;background:var(--card-soft);display:grid;place-items:center;margin:0 auto 14px;color:var(--text-3)}.switch{width:48px;height:28px;border-radius:var(--r-pill);background:#d6deea;position:relative;transition:background .2s;flex:none}.switch.on{background:var(--brand)}.switch:after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0000002e;transition:transform .2s}.switch.on:after{transform:translate(20px)}.options{display:flex;flex-direction:column;gap:10px}.opt{display:flex;align-items:flex-start;gap:12px;padding:14px 15px;border-radius:var(--r-md);background:#fff;border:1.5px solid var(--line);text-align:left;transition:border-color .15s,background .15s;width:100%}.opt .key{width:26px;height:26px;flex:none;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:600;background:var(--card-soft);color:var(--text-2);transition:background .15s,color .15s}.opt .txt{flex:1;font-size:15px;line-height:1.55;padding-top:2px}.opt.picked{border-color:var(--brand);background:var(--brand-soft)}.opt.picked .key{background:var(--brand);color:#fff}.opt.correct{border-color:var(--green);background:var(--green-soft)}.opt.correct .key{background:var(--green);color:#fff}.opt.wrong{border-color:var(--red);background:var(--red-soft)}.opt.wrong .key{background:var(--red);color:#fff}.opt.reveal{border-color:var(--brand-line);background:var(--brand-soft)}.opt.reveal .key{background:var(--brand);color:#fff}.opt.judge .txt{font-size:15.5px}.figure{border-radius:var(--r-md);border:1px solid var(--line);background:#fff;padding:8px}.figure img{width:100%;border-radius:8px;cursor:zoom-in}.lightbox{position:fixed;inset:0;background:#091221f0;z-index:100;display:grid;place-items:center;padding:16px}.lightbox img{max-width:100%;max-height:86vh;border-radius:8px}.lightbox .lb-close{position:absolute;top:calc(14px + env(safe-area-inset-top));right:16px;width:40px;height:40px;border-radius:50%;background:#ffffff29;color:#fff;display:grid;place-items:center}.toolbar{flex:none;display:flex;align-items:center;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line-soft)}.tool{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;color:var(--text-2);min-width:46px}.tool.on,.tool.on.star{color:var(--amber)}.tool.recite{color:var(--red)}.segment{display:flex;background:var(--card-soft);border-radius:var(--r-pill);padding:3px;gap:2px}.segment button{padding:7px 16px;border-radius:var(--r-pill);font-size:14px;font-weight:500;color:var(--text-2);transition:background .18s,color .18s}.segment button.active{background:var(--navy-900);color:#fff}@keyframes fadeUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.fade-up{animation:fadeUp .22s ease both}.wave{width:3px;border-radius:2px;background:#ffffff59;transition:background .2s}.wave.on{background:#6ea8ff;animation:wavePulse .9s ease-in-out infinite alternate}@keyframes wavePulse{0%{transform:scaleY(.4)}to{transform:scaleY(1.25)}}.modal-mask{position:fixed;inset:0;background:#09122173;backdrop-filter:blur(3px);z-index:80;display:flex;align-items:center;justify-content:center;padding:24px}.modal{width:100%;max-width:340px;background:#fff;border-radius:20px;padding:20px 18px;box-shadow:var(--shadow-float)}.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}