:root{--navy:#0d1b2a;--navy2:#162c3b;--orange:#f5820a;--blue:#1565c0;--bg:#f5f7fa;--white:#fff;--text:#1a2b3c;--muted:#5b6875;--border:#dce3ea;--max:1160px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit}.container{width:min(var(--max),calc(100% - 32px));margin:auto}img{max-width:100%;height:auto}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:100}
header{position:sticky;top:0;z-index:50;background:rgba(13,27,42,.98);color:#fff;border-bottom:1px solid #284050}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{font-weight:900;font-size:1.2rem;text-decoration:none;display:flex;align-items:center;gap:8px}.logo span{color:var(--orange)}nav{display:flex;gap:18px;align-items:center}nav a{text-decoration:none;font-size:.9rem;font-weight:700}.navbtn{background:var(--orange);padding:9px 15px;border-radius:999px}
section{padding:56px 0}.head{text-align:center;max-width:820px;margin:0 auto 40px}.head h1,.head h2{font-size:clamp(2rem,4vw,3.1rem);line-height:1.1;margin:0 0 14px}.head h2 span{color:var(--orange)}.head p{color:var(--muted)}
.article{max-width:820px;background:#fff;border:1px solid var(--border);border-radius:17px;padding:38px 44px;box-shadow:0 5px 20px #0d1b2a0a;margin:auto}
.article h1{font-size:clamp(1.9rem,4vw,2.6rem);line-height:1.15;margin:0 0 14px}
.article h2{font-size:1.45rem;line-height:1.25;margin:38px 0 12px;color:var(--navy)}
.article h3{font-size:1.15rem;margin:26px 0 8px}
.article p{color:var(--text);margin:14px 0}
.article ul,.article ol{margin:14px 0;padding-left:22px}.article li{margin:8px 0}
.article strong{color:var(--navy)}
.meta{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;color:var(--muted);font-size:.9rem;border-bottom:1px solid var(--border);padding-bottom:18px;margin-bottom:22px}
.tag{display:inline-block;background:#eef3f8;color:var(--blue);font-weight:700;font-size:.78rem;padding:4px 11px;border-radius:999px}
.lead{font-size:1.12rem;color:var(--muted)}
.notice{background:#fff4e8;border-left:5px solid var(--orange);padding:18px 20px;border-radius:8px;margin:24px 0}
.notice.info{background:#eaf2fb;border-left-color:var(--blue)}
.toc{background:#f5f7fa;border:1px solid var(--border);border-radius:12px;padding:16px 22px;margin:22px 0}.toc strong{display:block;margin-bottom:8px}.toc a{color:var(--blue);text-decoration:none}.toc ul{margin:0;padding-left:20px}.toc li{margin:5px 0}
.related{max-width:820px;margin:34px auto 0}.related h2{font-size:1.3rem;margin-bottom:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid var(--border);border-radius:17px;padding:22px;box-shadow:0 5px 20px #0d1b2a0a}.card h3{margin:0 0 10px;font-size:1.02rem}.card a{color:var(--blue);font-weight:700;text-decoration:none}
.back{display:inline-block;margin-top:22px;color:var(--blue);font-weight:700;text-decoration:none}
.appbox{display:flex;gap:16px;align-items:center;flex-wrap:wrap;background:var(--navy);color:#fff;border-radius:14px;padding:20px 24px;margin:30px 0}.appbox p{margin:0;color:#d8e1e7;font-size:.95rem;flex:1;min-width:200px}.appbox a{white-space:nowrap;background:var(--orange);color:#fff;font-weight:800;text-decoration:none;padding:11px 18px;border-radius:999px}
.footer{background:#09141d;color:#b8c4cc;padding:45px 0 18px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px}.footer h2{font-size:1rem;color:#fff}.footer a{display:block;text-decoration:none;margin:6px 0}.bottom{border-top:1px solid #263844;margin-top:28px;padding-top:15px;font-size:.85rem}
@media(max-width:900px){.grid3{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}nav{display:none}}
@media(max-width:620px){.container{width:calc(100% - 24px)}section{padding:40px 0}.grid3{grid-template-columns:1fr}.article{padding:26px 20px}}