:root{color:#172033;font-synthesis:none;background:#f5f7fb;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,textarea,select{font:inherit}.app{max-width:620px;min-height:100dvh;padding:env(safe-area-inset-top) 18px calc(86px + env(safe-area-inset-bottom));background:linear-gradient(#f9faff 0,#f5f7fb 220px);margin:auto}header{justify-content:space-between;align-items:center;height:92px;display:flex}h1,h2,h3,p{margin-top:0}header h1{margin:3px 0 0;font-size:25px}.eyebrow{color:#718096;letter-spacing:.08em;font-size:12px;font-weight:700}.connection{background:#fff;border-radius:18px;align-items:center;gap:6px;padding:8px 11px;font-size:12px;display:flex;box-shadow:0 4px 16px #1e315713}.connection i{background:#e05b69;border-radius:50%;width:7px;height:7px}.connection.online i{background:#21ad66}.connection.connecting i{background:#f0a928}.alert{color:#b5394d;text-align:left;background:#fff1f2;border:1px solid #ffd4d8;border-radius:11px;width:100%;margin-bottom:14px;padding:11px 13px}.alert b{float:right}.hero-card,.question-card,.answer-card,.upload-card,.settings{background:#fff;border:1px solid #e8ecf3;border-radius:20px;box-shadow:0 9px 32px #263a5e0e}.hero-card{background:linear-gradient(135deg,#fff,#f1f2ff);align-items:center;gap:18px;min-height:160px;padding:22px;display:flex}.computer-icon,.upload-icon{color:#fff;background:#5c67e8;border-radius:20px;place-items:center;width:64px;height:64px;font-size:28px;display:grid;box-shadow:0 10px 22px #5c67e840}.hero-card h2{margin:12px 0 6px;font-size:21px}.hero-card p{color:#8994a6;margin:0;font-size:12px}.pill{color:#c84455;background:#fff0f0;border-radius:14px;padding:5px 9px;font-size:11px}.pill.good{color:#21834a;background:#eaf8ef}.quota{grid-template-columns:1fr 1fr;gap:12px;margin:14px 0 24px;display:grid}.quota article{background:#fff;border:1px solid #e8ecf3;border-radius:16px;padding:16px}.quota span{color:#79869a;font-size:12px;display:block}.quota strong{margin-right:5px;font-size:29px}.quota em{color:#7f8a9a;font-size:12px;font-style:normal}.section-title{color:#5b6677;font-size:14px}.quick{grid-template-columns:1fr 1fr;gap:12px;display:grid}.quick button{text-align:left;background:#fff;border:0;border-radius:16px;align-items:center;gap:12px;padding:17px;display:flex;box-shadow:0 6px 20px #263a5e0c}.quick b{color:#5663e4;background:#eef0ff;border-radius:12px;place-items:center;width:36px;height:36px;display:grid}.quick span{font-weight:700}.quick small{color:#8b96a7;margin-top:3px;font-weight:400;display:block}.stage-line{color:#667286;margin:4px 3px 14px;font-size:13px}.pulse{background:#5c67e8;border-radius:50%;width:8px;height:8px;margin-right:7px;display:inline-block}.question-card,.answer-card{margin-bottom:13px;padding:18px}.question-card>span,.answer-card>span{color:#7c889b;font-size:12px;font-weight:700}.question-card p{margin:10px 0 0;line-height:1.65}.answer{font-size:var(--answer-size);white-space:pre-wrap;word-break:break-word;margin-top:12px;line-height:1.75}.answer i{color:#a1aaba;font-style:normal}.pre{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:calc(var(--answer-size) - 2px)}.composer{gap:9px;margin-top:14px;display:flex}.composer textarea{resize:none;border:1px solid #dfe4ec;border-radius:13px;flex:1;min-height:66px;padding:12px}.composer button,.primary{color:#fff;background:#5966e8;border:0;border-radius:13px;padding:0 18px;font-weight:700}.action-row{gap:10px;margin-top:12px;display:flex}.action-row button{background:#e9edf5;border:0;border-radius:12px;flex:1;padding:12px}.action-row .danger{color:#bd3b4e;background:#fff0f1}.upload-card{text-align:center;padding:25px 20px}.upload-icon{margin:0 auto 15px}.upload-card p{color:#7c8898;font-size:13px;line-height:1.6}.wide{width:100%;height:46px}.or{color:#a0a9b7;align-items:center;height:35px;font-size:11px;display:flex}.or:before,.or:after{content:"";background:#e9ecf1;flex:1;height:1px}.or span{padding:0 10px}.file-button{border:1px solid #dce2eb;border-radius:13px;place-items:center;height:46px;font-weight:700;display:grid}.file-button input{display:none}.upload-card select{background:#fff;border:1px solid #dce2eb;border-radius:11px;width:100%;height:42px;margin-top:12px;padding:0 11px}.settings{padding:20px}.settings h3{color:#687589;margin:18px 0 9px;font-size:13px}.settings h3:first-child{margin-top:0}.settings>label{border-bottom:1px solid #edf0f4;justify-content:space-between;align-items:center;padding:13px 0;display:flex}.settings label span{font-weight:700}.settings small{color:#939eae;font-weight:400;display:block}.settings input[type=range]{width:130px}.segments{background:#eff2f7;border-radius:11px;grid-template-columns:repeat(3,1fr);padding:4px;display:grid}.segments button{background:0 0;border:0;border-radius:8px;padding:9px}.segments .selected{color:#4f5dd8;background:#fff;box-shadow:0 2px 8px #263a5e12}.info{color:#778497;grid-template-columns:auto 1fr;gap:10px;font-size:12px;display:grid}.info code,.info b{text-align:right;text-overflow:ellipsis;overflow:hidden}.privacy{color:#929cac;margin:24px 0 0;font-size:11px;line-height:1.6}nav{width:min(620px,100%);height:72px;padding:7px 16px calc(7px + env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff2;border-top:1px solid #e8ebf1;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:0;left:50%;transform:translate(-50%)}nav button{color:#929cab;background:0 0;border:0;font-size:11px}nav span{height:27px;font-size:20px;display:block}nav .active{color:#5260df;font-weight:700}.pair-page,.splash{background:radial-gradient(circle at 50% 0,#e8eaff,#f5f7fb 50%);place-items:center;min-height:100dvh;padding:20px;display:grid}.pair-card{background:#fff;border:1px solid #e6eaf1;border-radius:25px;width:min(420px,100%);padding:30px;box-shadow:0 20px 60px #22345c18}.mark{color:#fff;background:linear-gradient(135deg,#5966e8,#9568eb);border-radius:18px;place-items:center;width:58px;height:58px;margin-bottom:22px;font-size:25px;font-weight:800;display:grid;box-shadow:0 10px 26px #6069e849}.pair-card h1{margin:6px 0 10px;font-size:27px}.pair-card>p{color:#758196;font-size:14px;line-height:1.65}.pair-card label{color:#657187;margin:22px 0 7px;font-size:12px;font-weight:700;display:block}.code{text-align:center;letter-spacing:.25em;border:1px solid #d8dfeb;border-radius:13px;width:100%;height:58px;padding-left:.25em;font-size:25px;font-weight:800}.pair-card .primary{margin-top:14px}.pair-card small{text-align:center;color:#98a1af;margin-top:15px;display:block}.pair-error{color:#ba3b50;background:#fff0f2;border-radius:9px;margin-top:10px;padding:9px;font-size:12px}.splash{text-align:center}.splash .mark{margin:0 auto 16px}.splash h1{font-size:22px}.splash p{color:#8590a2}@media (width<=380px){.app{padding-left:13px;padding-right:13px}.quick{grid-template-columns:1fr}.pair-card{padding:23px}.hero-card{padding:17px}.computer-icon{width:52px;height:52px}}