:root[data-theme="light"]{color-scheme:light;--ink:#1c1c1e;--muted:#686a73;--line:#e5e6eb;--paper:#fff;--soft:#f5f6fa;--line-strong:#dfe1e8;--card:#f8f8fb;--strip:#fcfcfd;--art-a:#f0efff;--art-b:#f7f8fc;--contrast:#1c1c1e;--card-accent:#f0faf7;--card-accent-line:#cdeee5;}
:root{color-scheme:dark;--ink:#ececee;--muted:#a6a8b2;--line:#2a2d36;--paper:#14161c;--soft:#1c1f27;--line-strong:#3a3e48;--card:#191d26;--strip:#171a22;--art-a:#1a2030;--art-b:#141824;--contrast:#0b0f18;--card-accent:#12251f;--card-accent-line:#1d3d34;--accent:#0f7b6c;--accent-dark:#0b6154;--purple:#0f7b6c;--max:1160px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Helvetica Neue",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}a:hover{color:var(--accent-dark)}.wrap{width:min(var(--max),calc(100% - 48px));margin:auto}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:20px;font-weight:750;letter-spacing:-.04em}.brand span{color:var(--accent)}.navlinks{display:flex;align-items:center;gap:26px;font-size:14px;color:var(--muted)}.navlinks a:hover{color:var(--ink)}.navlinks .pill{padding:9px 15px;border-radius:999px;background:var(--ink);color:var(--paper)}.lang{border-left:1px solid var(--line);padding-left:20px}.hero{padding:82px 0 64px;display:grid;grid-template-columns:.86fr 1.14fr;gap:48px;align-items:center}.eyebrow{color:var(--accent-dark);font-size:13px;font-weight:700;letter-spacing:.11em;text-transform:uppercase}.hero h1{font-size:clamp(40px,5.6vw,64px);line-height:1.06;letter-spacing:-.065em;margin:20px 0}.hero p{font-size:19px;color:var(--muted);max-width:490px;margin:0 0 28px}.actions{display:flex;flex-wrap:wrap;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 19px;border-radius:10px;background:var(--accent);color:white;font-weight:650;box-shadow:0 6px 18px #0f7b6c2b}.button:hover{color:white;background:var(--accent-dark)}.button.secondary{background:var(--paper);color:var(--ink);box-shadow:none;border:1px solid var(--line)}.micro{font-size:13px!important;margin-top:14px!important}.hero-art{position:relative}.hero-art:before{content:"";position:absolute;inset:8% -4% -5% 8%;background:linear-gradient(145deg,var(--art-a),var(--art-b));border-radius:25px;z-index:-1}.hero-art img{display:block;width:100%;height:auto;border:1px solid var(--line-strong);border-radius:12px;box-shadow:0 24px 70px #22212b20}.caption{font-size:12px;color:var(--muted);text-align:right;margin:10px 2px}.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--strip)}.strip-inner{display:flex;gap:30px;justify-content:space-between;padding:19px 0;color:var(--muted);font-size:14px}.strip strong{color:var(--ink)}section.content{padding:82px 0}.section-head{max-width:720px;margin-bottom:38px}.section-head h2{font-size:clamp(30px,4vw,46px);line-height:1.12;letter-spacing:-.05em;margin:10px 0 14px}.section-head p{color:var(--muted);font-size:17px;margin:0}.columns{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature{padding:24px 23px;border-top:2px solid var(--accent);background:var(--soft);min-height:190px}.feature .num{font:600 12px ui-monospace,monospace;color:var(--accent-dark)}.feature h3{font-size:19px;margin:16px 0 8px}.feature p{color:var(--muted);font-size:14px;margin:0}.workflow{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.step{padding:23px 22px 25px 0}.step+.step{padding-left:22px;border-left:1px solid var(--line)}.step b{display:block;font-size:13px;color:var(--accent-dark);margin-bottom:10px}.step p{font-size:14px;color:var(--muted);margin:0}.license{display:grid;grid-template-columns:1fr 1fr;gap:22px}.license article{padding:26px;background:var(--card);border:1px solid var(--line);border-radius:14px}.license h3{margin:0 0 10px;font-size:20px}.license p{color:var(--muted);margin:0 0 16px}.license a.inline{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}.license .commercial{background:var(--card-accent);border-color:var(--card-accent-line)}.install{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 32px;background:var(--contrast);color:white;border-radius:15px}.install p{margin:6px 0 0;color:#c9c9d2;font-size:14px}.install code{display:inline-block;background:#303036;padding:11px 14px;border-radius:8px;color:#f6f4ff;font:13px ui-monospace,monospace}.footer{border-top:1px solid var(--line);padding:28px 0 42px;color:var(--muted);font-size:13px}.footer-inner{display:flex;justify-content:space-between;gap:20px}.footer a{text-decoration:underline;text-underline-offset:3px}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;padding:10px;background:var(--paper);z-index:5}a:focus-visible{outline:3px solid var(--purple);outline-offset:3px;border-radius:3px}@media(max-width:850px){.hero{grid-template-columns:1fr;padding-top:58px;gap:38px}.hero-art{max-width:780px}.navlinks{gap:15px}.navlinks .optional{display:none}}@media(max-width:650px){.wrap{width:min(var(--max),calc(100% - 32px))}.nav{height:62px}.navlinks{gap:12px;font-size:13px}.navlinks .pill{padding:7px 11px}.lang{padding-left:12px}.hero{padding:48px 0 44px}.hero h1{font-size:46px}.hero p{font-size:17px}.strip-inner{display:grid;grid-template-columns:1fr 1fr;gap:12px}.content{padding:58px 0!important}.columns,.license{grid-template-columns:1fr}.feature{min-height:auto}.workflow{grid-template-columns:1fr 1fr}.step{padding:19px 12px 20px 0}.step+.step{padding-left:14px}.step:nth-child(3){border-left:0;padding-left:0;border-top:1px solid var(--line)}.step:nth-child(4){border-top:1px solid var(--line)}.install{align-items:flex-start;flex-direction:column;padding:24px}.install code{font-size:12px;max-width:100%;overflow-wrap:anywhere}.footer-inner{flex-direction:column}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;padding:0;border-radius:9px;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:14px;line-height:1;cursor:pointer}
.theme-toggle:hover{color:var(--ink);border-color:var(--line-strong);background:var(--soft)}
.theme-toggle svg{display:block}
/* 网络自证段里的内联命令：等宽 + 细边框，避免在句子里读成普通词 */
.section-head code,.feature p code{font:600 13px ui-monospace,SFMono-Regular,Menlo,monospace;padding:1px 5px;border-radius:5px;background:var(--paper,#fff);border:1px solid var(--line-strong,var(--line,#dfe1e8));color:var(--ink);white-space:nowrap}

picture{display:contents}