:root{--ink:#162c3e;--muted:#566571;--copper:#94633d;--line:#d7dfe2;--paper:#fff;--wash:#f4f6f6;--soft:#eee5dc}*{box-sizing:border-box}body{margin:0;background:var(--wash);color:var(--ink);font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-size:17px;line-height:1.75}a{color:var(--ink);text-underline-offset:4px;text-decoration-thickness:1px}a:hover{color:var(--copper)}a:focus-visible{outline:2px solid var(--copper);outline-offset:5px}header{max-width:1120px;margin:auto;padding:24px 32px;display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line)}.brand{font-family:Georgia,serif;font-size:24px;text-decoration:none;letter-spacing:-.6px}.brand span{color:var(--copper)}nav{display:flex;flex-wrap:wrap;gap:20px;font-size:14px}nav a{min-height:44px;display:inline-flex;align-items:center}main{max-width:1120px;margin:0 auto;padding:48px 32px 72px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--copper);margin:0 0 14px}h1{font-family:Georgia,"Microsoft YaHei",serif;font-size:clamp(32px,4.6vw,54px);line-height:1.22;letter-spacing:-1px;font-weight:500;margin:0 0 22px;max-width:920px}h2{font-size:27px;line-height:1.4;font-weight:600;margin:0 0 20px}h3{font-size:20px;line-height:1.45;margin:0 0 12px}p{margin:0 0 16px;text-wrap:pretty}.lead{font-size:20px;line-height:1.75;max-width:830px;color:var(--muted)}.meta{font-size:13px;color:var(--muted);margin:16px 0 0}.hero{padding:0 0 36px;border-bottom:1px solid var(--line)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 0}.button{display:inline-flex;min-height:46px;padding:9px 18px;align-items:center;text-decoration:none;border:1px solid var(--ink);border-radius:2px;font-size:15px}.primary{background:var(--ink);color:#fff}.primary:hover{background:var(--copper);color:#fff}.section{padding:36px 0;border-bottom:1px solid var(--line)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.number{display:block;font-size:13px;color:var(--copper);margin-bottom:12px}.small{font-size:14px;color:var(--muted)}.table-wrap{overflow-x:auto;margin:20px 0}.table-wrap:focus-visible{outline:2px solid var(--copper)}table{border-collapse:collapse;width:100%;font-size:15px;text-align:left}th{background:var(--ink);color:#fff;font-size:13px;font-weight:600;padding:12px 14px;line-height:1.5}td{padding:14px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.6}tbody tr:nth-child(even){background:#f7f8f8}.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}.note{background:var(--soft);padding:20px 24px;margin:24px 0;font-size:15px;line-height:1.8}.split{display:grid;grid-template-columns:1fr 1fr;gap:36px}.list{padding-left:22px;margin:12px 0}.list li{padding:5px 0}.newsletter{max-width:820px;background:var(--paper);margin:36px auto;padding:48px 64px;box-shadow:0 1px 8px #162c3e0a}.newsletter h1{font-size:clamp(32px,4.5vw,45px);letter-spacing:-.7px}.newsletter .lead{font-size:18px}.newsletter .section{padding:30px 0}.newsletter h2{font-size:25px}.newsletter .case-title{font-size:13px;color:var(--copper);font-weight:700;letter-spacing:1px}.work{background:var(--wash);padding:20px;margin:20px 0}.work strong{display:block;margin-bottom:6px;font-size:14px}.source{font-size:13px;line-height:1.7;color:var(--muted)}.source a{overflow-wrap:anywhere}.pill{display:inline-block;font-size:12px;border:1px solid var(--line);padding:3px 9px;margin-right:6px}.endnote{font-size:14px;color:var(--muted);padding-top:24px}footer{max-width:1120px;margin:auto;padding:24px 32px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.spec{max-width:920px}.spec h1{font-size:42px}.spec .section p,.spec .section li{max-width:78ch}code{font-family:Consolas,monospace;font-size:.9em}.break{overflow-wrap:anywhere}.download-list{list-style:none;padding:0}.download-list li{display:flex;justify-content:space-between;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}
@media(max-width:820px){.grid{grid-template-columns:1fr;gap:24px}.split{grid-template-columns:1fr;gap:20px}.newsletter{margin:24px auto;padding:36px;max-width:calc(100% - 40px)}main{padding-top:36px}.spec h1{font-size:36px}}
@media(max-width:520px){body{font-size:16px}header{padding:18px 20px;display:block}.brand{font-size:22px}nav{gap:18px;margin-top:8px}main{padding:28px 20px 48px}.newsletter{max-width:100%;margin:0;padding:30px 22px;box-shadow:none}h1{font-size:34px}.spec h1{font-size:32px}.lead{font-size:18px}h2{font-size:24px}.newsletter h2{font-size:23px}.section{padding:28px 0}.button{width:100%;justify-content:center}.download-list li{display:block}.download-list .small{display:block;margin-top:5px}.note{padding:18px}.table-wrap table{min-width:660px}footer{padding:20px}.meta{line-height:1.7}}
@media print{body{background:white;font-size:11pt}header,nav,.actions,footer{display:none}main,.newsletter{max-width:none;margin:0;padding:0;box-shadow:none}.section{break-inside:avoid}h1{font-size:27pt}.note{background:#f5f5f5}a{color:inherit}table{font-size:9pt}}
html[lang=zh-CN] .newsletter h2{text-wrap:balance}.projects-table{min-width:820px}.projects-table th:first-child{width:190px}.projects-table th:nth-child(2){width:70px;white-space:nowrap}.scroll-hint{font-size:13px;color:var(--muted);margin-bottom:0}
.sample-navigation{gap:18px}h1{text-wrap:balance}@media screen{body{font-size:18px}nav,.button,.small,.source,.endnote,.meta,.note,table,th,.work strong,.scroll-hint{font-size:16px}.eyebrow,.number,.newsletter .case-title,.pill,footer{font-size:15px}code{font-size:1em}}@media screen and (max-width:520px){.sample-navigation{gap:12px}}