:root{--ink:#162f3b;--muted:#536c78;--accent:#006e79;--line:#d7e3e7;--paper:#fff;--bg:#eff4f5;font-family:"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.8}*{box-sizing:border-box}body{margin:0}a{color:#006570;text-underline-offset:3px}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #efab32;outline-offset:3px}a:hover{color:#003e49}h1,h2,h3,h4,h5{line-height:1.45;overflow-wrap:anywhere}h1{font-size:clamp(25px,3.2vw,40px);margin:6px 0 14px;letter-spacing:-.03em}h2{font-size:25px;margin:0 0 20px}h3{font-size:20px;margin:0 0 16px}h4{font-size:15px;margin:20px 0 5px;color:#315f6c}h5{font-size:14px;margin-bottom:5px}p{margin:10px 0}ul,ol{padding-left:1.6em;margin:5px 0 15px}li{margin:4px 0;overflow-wrap:anywhere}.top{background:#103b46;color:#fff;padding:15px 30px;display:flex;align-items:center;justify-content:space-between;gap:16px}.top a{color:white;text-decoration:none}.brand{font-weight:700;font-size:18px}.top span{color:#b8dce1;font-size:12px;margin-left:12px}.top-actions{display:flex;gap:8px}.top button{border:1px solid #70959e;background:transparent;color:white;border-radius:6px;padding:5px 12px}.menu-toggle{display:none}.layout{display:grid;grid-template-columns:260px minmax(0,1fr);max-width:1600px;margin:auto}.sidebar{padding:28px 22px;align-self:start;position:sticky;top:0;max-height:100vh;overflow:auto}.sidebar h2{font-size:12px;color:#617f89;letter-spacing:.05em;margin:21px 0 7px}.sidebar a{display:block;padding:5px 10px;text-decoration:none;border-radius:5px;font-size:13px}.sidebar a.active{background:#d6e9eb;font-weight:700;color:#104957}.sidebar a:hover{background:#e0ecee}main{min-width:0;padding:30px 38px 70px;max-width:1160px}.hero{margin-bottom:27px}.eyebrow{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.08em}.lead{font-size:16px;max-width:860px}.pill,.count{display:inline-block;border:1px solid #bfd4d9;background:#e8f1f2;color:#335e68;border-radius:20px;font-size:12px;line-height:1.5;padding:3px 9px}.counts{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.searchbox{background:var(--paper);border:1px solid var(--line);padding:20px;border-radius:10px;margin:18px 0 28px}.searchbox label{display:block;font-weight:700;margin-bottom:10px}.searchline{display:flex;gap:10px}.searchline input{width:100%;min-width:0;border:1px solid #a5bec5;border-radius:6px;padding:10px 12px}.searchline select{max-width:260px;min-width:130px;border:1px solid #a5bec5;border-radius:6px;padding:8px}.hint,.caption,.version,figcaption{font-size:12px;color:var(--muted)}.search-result{display:block;background:white;border:1px solid var(--line);border-radius:8px;padding:17px 20px;margin:12px 0;text-decoration:none}.search-result h3{margin:3px 0;font-size:17px}.search-result p{margin:5px 0;font-size:13px}.search-result .where{font-size:12px;color:#5c7b85}.search-result mark{background:#fceab1;color:inherit}.result-heading{font-size:18px}.category{margin:33px 0}.product-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.product-card{background:white;border:1px solid var(--line);border-radius:9px;padding:20px}.product-card h3{font-size:18px;margin:0 0 9px}.product-card p{font-size:13px}.product-card .summary{max-height:7.2em;overflow:hidden}.toc{background:#e5eff1;border-radius:8px;padding:14px 20px;margin:24px 0}.toc summary{cursor:pointer;font-weight:700}.toc ul{columns:2;column-gap:28px;list-style:none;padding:8px 0;margin:0}.toc li{break-inside:avoid;font-size:13px;padding:2px 0}.menu-group{margin:40px 0 16px;font-size:21px;color:#416471}.menu{background:white;border:1px solid var(--line);border-radius:10px;padding:28px 32px;margin:17px 0;scroll-margin-top:20px}.menu-head{display:flex;align-items:flex-start;gap:14px;justify-content:space-between}.menu-head h3{font-size:22px}.menu-number{font-size:13px;color:#69818b;display:block;margin-bottom:4px}.path{font-family:inherit;background:#edf4f6;border-left:3px solid #87b4bd;padding:11px 14px;font-size:13px;overflow-wrap:anywhere}.purpose{font-size:16px}.field{margin:13px 0}.field h4{margin-bottom:5px}.field li{font-size:14px}.variant{border-left:3px solid #c6dce1;margin:22px 0;padding-left:18px}.variant h4{margin-top:10px}.sources,.animation{padding:12px 0;border-top:1px solid #e4edef;margin-top:20px}.sources summary,.animation summary{cursor:pointer;color:#386775;font-weight:600;font-size:13px}.sources li{font-size:12px}.animation-item{padding:0 0 10px}.animation-item li{font-size:13px}.scope{padding:18px 22px;background:#fffaf0;border:1px solid #ead9b5;border-radius:8px;margin:24px 0}.scope li{font-size:13px}.scope h2{font-size:17px;margin:0}.appendix{margin-top:46px;border-top:2px solid #aecbd2;padding-top:28px}.appendix>p{font-size:13px}.appendix .menu{background:#faffff}figure{margin:24px 0}img{display:block;width:100%;height:auto;border:1px solid #d5e1e5;border-radius:6px;background:#f5f8f8}.image-link{display:block}figcaption{margin-top:7px}.online-links{display:flex;flex-wrap:wrap;gap:18px;font-size:13px}.bottom-nav{display:flex;justify-content:space-between;gap:20px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line)}.bottom-nav a{max-width:46%;font-size:13px}.back-top{font-size:12px;float:right}footer{padding-top:28px;color:#63808a;font-size:12px}.empty{padding:25px;background:white;border-radius:8px} [hidden]{display:none!important}@media(min-width:1500px){main{max-width:1250px}}@media(max-width:850px){.layout{display:block}.sidebar{display:none;position:static;max-height:none;background:#e4eef0;padding:12px 24px}.sidebar.is-open{display:block;max-height:70vh;overflow:auto;border-bottom:1px solid #bfd4d9}.sidebar nav{columns:2}.sidebar h2{break-after:avoid}.sidebar a{break-inside:avoid}.menu-toggle{display:block}.top{padding:13px 18px}.top span{display:none}main{padding:24px 20px 50px}.menu{padding:22px}.searchline{flex-direction:column}.searchline select{max-width:none}.toc ul{columns:1}.product-grid{grid-template-columns:1fr}.menu-head{display:block}.menu-head h3{font-size:21px}.menu-head .pill{margin-bottom:8px}.online-links{gap:12px}.sidebar nav{columns:1}.hero .lead{font-size:15px}}@media print{body{background:white;font-size:10pt}.top,.sidebar,.searchbox,#search-results,.toc,.bottom-nav,.back-top{display:none!important}.layout{display:block}main{max-width:none;padding:0}.menu{border:0;border-radius:0;break-inside:auto;padding:18px 0;margin:15px 0}.menu h3,.path{break-after:avoid}figure{break-inside:avoid}img{max-height:180mm;object-fit:contain}.sources,.animation{display:block}.sources>*,.animation>*{display:block}a{color:inherit}.product-grid{display:block}.product-card{break-inside:avoid;margin:15px 0}.scope{background:transparent}.appendix{break-before:page}}