:root{color-scheme:light;--ink:#20352f;--muted:#60746a;--green:#185a43;--mint:#ddf3e8;--line:#d7e4de;--paper:#fff;--canvas:#f5f8f7}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit}a:focus-visible{outline:3px solid #72b79b;outline-offset:5px;border-radius:4px}.shell{max-width:1136px;padding:0 32px;margin:auto}.skip{position:absolute;left:20px;top:-80px;background:#fff;padding:10px 15px;border:1px solid var(--green);z-index:20}.skip:focus{top:12px}header{display:flex;align-items:center;justify-content:space-between;min-height:86px;border-bottom:1px solid var(--line);gap:20px}.brand{text-decoration:none;display:flex;align-items:center;gap:11px;font-size:20px;font-weight:750;letter-spacing:-.5px}.mark{height:30px;width:30px;background:var(--mint);border:1px solid #aed4c2;border-radius:9px;display:grid;place-items:center;color:var(--green);font-size:13px;letter-spacing:-1px}nav{display:flex;align-items:center;gap:24px;font-size:12px;color:var(--muted)}nav>a{text-decoration:none}nav>a:hover,.text-link:hover{text-decoration:underline;text-underline-offset:4px;color:var(--green)}.languages{display:flex;padding:3px;border:1px solid var(--line);border-radius:8px;background:#fff;gap:3px}.languages a{text-decoration:none;border-radius:5px;padding:4px 8px;min-height:29px}.languages a[aria-current=page]{background:#e5f2eb;color:var(--green);font-weight:700}.hero{padding:67px 0 49px;display:grid;grid-template-columns:1.35fr .65fr;gap:52px;align-items:center}.eyebrow{font-size:10px;text-transform:uppercase;letter-spacing:1.7px;color:var(--green);font-weight:760;margin:0 0 16px}.hero h1{font-size:51px;line-height:1.14;letter-spacing:-2px;font-weight:720;margin:0 0 21px;max-width:660px}.accent{color:#2c8060}.intro{color:var(--muted);font-size:16px;line-height:1.8;margin:0;max-width:610px}.facts{border:1px solid var(--line);background:#eaf2ed;border-radius:14px;padding:25px}.facts-title{font-size:12px;color:var(--green);font-weight:750;letter-spacing:.5px;margin:0 0 18px}.facts p{margin:10px 0;color:var(--muted);font-size:12px}.facts strong{color:var(--ink);font-weight:650}.facts code{font:11px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}.section-top{display:flex;justify-content:space-between;gap:26px;align-items:baseline;border-top:1px solid var(--line);padding:25px 0 22px}.section-top h2{font-size:21px;letter-spacing:-.4px;margin:0}.section-top p{font-size:12px;color:var(--muted);margin:0}.tools{display:grid;grid-template-columns:1fr 1fr;gap:21px}.card{border:1px solid var(--line);border-radius:15px;background:var(--paper);padding:30px;display:flex;flex-direction:column}.tag{display:inline-block;font-size:10px;font-weight:700;color:var(--green);background:#eaf4ee;border:1px solid #d5e8dc;border-radius:5px;padding:4px 8px;align-self:flex-start}.card h3{font-size:29px;line-height:1.2;letter-spacing:-1px;margin:21px 0 14px}.question{font-size:16px;line-height:1.6;font-weight:650;margin:0 0 15px;max-width:420px}.card .body{font-size:13px;color:var(--muted);margin:0}.features{padding-left:18px;margin:18px 0 21px;font-size:12px;color:var(--muted)}.features li{margin:8px 0}.command{border:1px solid #d2dfd6;background:#f0f5f1;border-radius:9px;padding:14px;margin:0 0 21px}.command-label{display:block;font-size:9px;color:#698071;font-weight:650;letter-spacing:.5px;text-transform:uppercase;margin-bottom:7px}.command code{font:11px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;color:#385d45;white-space:normal;overflow-wrap:anywhere}.buttons{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:auto}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:10px 13px;border:1px solid var(--line);border-radius:8px;background:#fff;text-decoration:none;font-size:11px;font-weight:650;min-height:43px}.button:hover{background:#eaf2ed;border-color:#b1cebd}.button.primary{background:var(--green);border-color:var(--green);color:#fff}.button.primary:hover{background:#104731}.doc-links{display:flex;gap:17px;flex-wrap:wrap;margin-top:16px;font-size:11px}.text-link{font-weight:650;color:var(--green);text-decoration:none}.limits{padding:18px 21px;background:#eef3ef;border-left:3px solid #a0c3ad;border-radius:0 9px 9px 0;margin:28px 0 40px}.limits h2{font-size:12px;margin:0 0 5px;color:#30563b}.limits p{font-size:11px;line-height:1.85;color:#5b7462;margin:0;max-width:950px}.footer{border-top:1px solid var(--line);padding:24px 0 29px;display:flex;justify-content:space-between;gap:20px;align-items:flex-start;color:var(--muted);font-size:10px}.footer-links{display:flex;gap:20px;flex-wrap:wrap}.footer a:hover{color:var(--green);text-decoration:underline}.footer-name{color:#3a6045;font-weight:650}html[lang=zh-CN] .hero h1{font-size:46px;line-height:1.3;letter-spacing:-1.3px}html[lang=zh-CN] .eyebrow{letter-spacing:.8px}
@media(max-width:850px){.hero{grid-template-columns:1fr;gap:27px;padding:47px 0 35px}.hero h1{font-size:45px}.facts{display:flex;gap:15px;flex-wrap:wrap;padding:17px 21px}.facts-title{width:100%;margin:0}.facts p{margin:0}.tools{gap:16px}.card{padding:24px}.section-top{display:block}.section-top p{margin-top:7px}.shell{padding:0 24px}}
@media(max-width:640px){header{min-height:77px}.brand{font-size:18px}nav{gap:12px}nav>a{display:none}.hero h1{font-size:39px;letter-spacing:-1.3px}.intro{font-size:14px}.tools{grid-template-columns:1fr}.card{padding:25px}.card h3{font-size:28px}.question{font-size:15px}.footer{flex-direction:column;gap:12px}html[lang=zh-CN] .hero h1{font-size:35px}.shell{padding:0 19px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}.demo-note{font-size:11px;color:var(--muted);margin:10px 0 0}.card .buttons{margin-top:19px;margin-bottom:0}.card .command{margin-bottom:0}.hero{padding-top:52px;padding-bottom:42px}