:root{color-scheme:light;--ink:#173534;--muted:#607372;--paper:#f0f2ed;--accent:#d4ee81;--line:#d8dfd6}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.7}header{max-width:1050px;margin:auto;padding:22px 26px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:12px}.brand{font-weight:700;letter-spacing:.08em}.badge{font-size:12px;border:1px solid #9bb2a6;border-radius:20px;padding:4px 12px;white-space:nowrap}main{max-width:900px;margin:auto;padding:35px 24px}.intro{padding:10px 0 30px}.eyebrow{font-size:13px;letter-spacing:.15em;color:var(--muted)}h1{font-family:"Songti SC","SimSun",serif;font-size:clamp(44px,9vw,76px);line-height:1.15;font-weight:500;margin:20px 0}h1 em{font-style:normal;color:#357566}.lead{max-width:630px;color:var(--muted)}.notice{display:inline-block;border-left:3px solid #397663;padding:7px 14px;background:#e4eadf;font-size:14px}.panel{background:#fffef9;padding:28px;margin-bottom:22px;border:1px solid var(--line);border-radius:12px}h2{font-size:21px;margin:0 0 22px}h2 span{font-family:monospace;font-size:14px;color:#70857a;margin-right:14px}label{display:block;font-weight:600;margin:12px 0}small{display:block;font-size:12px;color:var(--muted);font-weight:400}input,select{font:inherit;font-size:16px;width:100%;padding:13px 12px;background:white;border:1px solid #aebdb6;border-radius:6px;color:var(--ink);margin-top:7px;min-height:48px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}.hint{font-size:13px;color:var(--muted)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}button{font:inherit;padding:12px 20px;border:1px solid #9cafa2;border-radius:7px;min-height:48px;color:var(--ink);background:transparent;cursor:pointer}button.primary{background:var(--ink);color:var(--accent);border:0;flex:1;font-weight:700}button.primary span{float:right;margin-left:16px}button:disabled{opacity:.45;cursor:default}input:focus,select:focus,button:focus-visible{outline:3px solid #a2c66b;outline-offset:2px}progress{width:100%;height:7px;accent-color:#367562}#progress{font-size:14px;min-height:24px}.result{padding:18px 0;border-top:1px solid var(--line)}.result-head{display:flex;justify-content:space-between;gap:12px}.result h3{margin:0;font-size:16px}.result .metrics{display:flex;gap:24px;flex-wrap:wrap;margin-top:9px;font-size:13px;color:var(--muted)}.metrics strong{font-size:23px;font-family:monospace;color:var(--ink);font-weight:500}.status{font-size:12px;color:#367562}.status.bad{color:#ad4135}.error{font-size:12px;color:#ad4135}.empty{color:var(--muted);padding:18px 0}.navigation{font-size:13px;color:var(--muted);margin-bottom:16px}output{display:block;word-break:break-all;background:#edf1e8;padding:16px;font-family:monospace;font-size:14px}footer{text-align:center;color:var(--muted);font-size:12px;padding:12px 0 30px}@media(max-width:550px){header{padding:16px}.brand{font-size:14px}main{padding:20px 16px}.panel{padding:20px 17px}.fields{grid-template-columns:1fr;gap:0}.result-head{flex-direction:column;gap:3px}.result .metrics{gap:16px}button{padding:12px 15px}.intro{padding-top:0}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s ease}button:hover:not(:disabled){background:#dce9c4;color:#173534}}