:root{--paper: #fbfaf5;--ink: #15282d;--ink2: #5a6b6e;--teal: #0f7c87;--teal-soft: #e3eff0;--line: #cdd6d3;--amber: #b5731a;--green: #2f6b4f;--serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;--sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--mono: "IBM Plex Mono", "SF Mono", Consolas, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}.wrap{max-width:1080px;margin:0 auto;padding:0 24px}h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.35;margin:0 0 .6em}h1{font-size:clamp(28px,4.6vw,44px);letter-spacing:.01em}h2{font-size:clamp(22px,3vw,30px)}h3{font-size:18px}p{margin:0 0 1em}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--teal);outline-offset:2px}.mono{font-family:var(--mono)}.muted{color:var(--ink2)}.small{font-size:13px}section.blk{padding:64px 0;border-top:1px solid var(--line)}section.blk:first-of-type{border-top:0}.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--teal);margin-bottom:14px}.eyebrow:before{content:"";width:26px;height:1px;background:var(--teal)}.btn{display:inline-block;padding:12px 26px;border:1.5px solid var(--ink);color:var(--ink);font-size:15px;letter-spacing:.04em;background:transparent;cursor:pointer;transition:background .15s,color .15s}.btn:hover{background:var(--ink);color:var(--paper);text-decoration:none}.btn.primary{background:var(--teal);border-color:var(--teal);color:#fff}.btn.primary:hover{background:#0c636c;border-color:#0c636c}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}.card{border:1px solid var(--line);background:#fff;padding:26px 24px}.card .num{font-family:var(--mono);font-size:40px;color:var(--teal);line-height:1}.card .num small{font-size:18px}.card .lbl{margin-top:10px;font-size:14.5px;color:var(--ink)}table.params{width:100%;border-collapse:collapse;font-size:14.5px}table.params th,table.params td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}table.params th{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:var(--ink2);font-weight:500;white-space:nowrap}table.params td.v{font-family:var(--mono)}.prose{max-width:720px}.prose h2{margin-top:1.8em}.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:1em 0}.prose th,.prose td{border:1px solid var(--line);padding:8px 12px;text-align:left}.prose th{background:var(--teal-soft);font-weight:600}.prose blockquote{margin:1.2em 0;padding:2px 18px;border-left:3px solid var(--teal);color:var(--ink2)}.form-grid{display:grid;gap:14px}.form-grid label{font-size:13px;color:var(--ink2);display:block;margin-bottom:4px}.form-grid input,.form-grid select,.form-grid textarea{width:100%;padding:10px 12px;border:1px solid var(--line);background:#fff;font-family:var(--sans);font-size:15px;color:var(--ink)}.notice{border:1px solid var(--line);background:var(--teal-soft);padding:12px 16px;font-size:13.5px}footer.site{border-top:1px solid var(--line);padding:36px 0 48px;margin-top:80px;font-size:13.5px;color:var(--ink2)}footer.site nav{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:14px}footer.site a{color:var(--ink2)}header.site{border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:50}header.site .bar{display:flex;align-items:center;justify-content:space-between;height:60px}header.site .logo{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink);letter-spacing:.06em}header.site .logo b{color:var(--teal)}header.site nav{display:flex;gap:22px;font-size:14.5px}header.site nav a{color:var(--ink)}header.site nav a:hover{color:var(--teal);text-decoration:none}@media(max-width:760px){header.site nav{gap:14px;font-size:13px;overflow-x:auto}header.site .bar{height:auto;padding:10px 0;flex-direction:column;gap:8px;align-items:flex-start}}.range-band{position:relative;height:54px}.range-band .rail{position:absolute;left:0;right:0;top:26px;height:2px;background:var(--line)}.range-band .band{position:absolute;top:20px;height:14px;background:var(--teal-soft);border:1px solid var(--teal)}.range-band .tick{position:absolute;top:14px;width:2px;height:26px;background:var(--teal)}.range-band .lab{position:absolute;top:44px;font-family:var(--mono);font-size:11.5px;color:var(--ink2);transform:translate(-50%)}