@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--navy:#0b2027;--navy2:#112a32;--mint:#01875f;--jade:#12b981;--light:#f5f8f7;--border:#dce9e5;--text:#1c3438;--muted:#5d7475;--paper:#fff;--radius:20px;--shadow:0 20px 60px rgba(11,32,39,.065)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--light);color:var(--text);font-family:'DM Sans',system-ui,-apple-system,'Segoe UI',sans-serif;font-size:16px;line-height:1.75}a{color:var(--mint);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}button,input{font:inherit}::selection{background:#c0ffdf;color:#023526}:focus-visible{outline:3px solid #19ad81;outline-offset:3px}
.progress{position:fixed;top:0;left:0;width:0;height:4px;background:linear-gradient(90deg,#05a671,#77edc3);z-index:999}
.header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(18px);z-index:90;border-bottom:1px solid var(--border)}.header-inner{max-width:1500px;padding:14px 28px;margin:auto;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.03em;color:#12342f}.brand:hover{text-decoration:none}.brandmark{background:#01875f;color:#fff;display:grid;place-items:center;width:39px;height:39px;border-radius:12px;font-weight:800}.brand small{display:block;color:#728a84;font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase}.headnav{display:flex;align-items:center;gap:22px;margin-left:auto}.headnav a{color:#2d4a4b;font-weight:700;font-size:13px}.headnav a:hover{color:var(--mint)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 18px;border-radius:12px;font-weight:800;font-size:14px;cursor:pointer;transition:.2s;border:1px solid transparent}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn-primary{background:#01875f;color:#fff;box-shadow:0 10px 20px rgba(1,135,95,.16)}.btn-primary:hover{background:#006b4d;color:#fff}.btn-light{background:#fff;color:#164e40;border-color:#d0e4dc}.btn-dark{background:#122d33;color:#fff;border-color:#2c5255}.menubtn{display:none;border:1px solid #d8e6e1;border-radius:10px;padding:7px 12px;background:#fff;color:#134d40}
.hero{background:radial-gradient(circle at 92% 18%,#16674e 0%,transparent 35%),linear-gradient(130deg,#081a26,#0e2b2d 66%,#123b30);color:#fff;position:relative;overflow:hidden}.hero:before{content:'';position:absolute;inset:0;background-image:radial-gradient(#b8f7d4 1px,transparent 1px);background-size:34px 34px;opacity:.09}.hero-inner{position:relative;max-width:1280px;margin:auto;padding:75px 32px 85px;display:grid;grid-template-columns:1.25fr .85fr;gap:75px;align-items:center}.eyebrow{display:inline-block;padding:7px 13px;border:1px solid rgba(144,248,189,.3);background:rgba(24,179,123,.13);border-radius:99px;color:#aaf1cf;font-size:12px;font-weight:800;letter-spacing:.11em;text-transform:uppercase}.hero h1{margin:20px 0;font-size:clamp(42px,5vw,72px);font-family:Manrope,sans-serif;line-height:1.08;letter-spacing:-.065em}.hero h1 span{color:#56dda9}.hero p{max-width:670px;color:#c1d6d4;font-size:18px;line-height:1.75}.hero-buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}.hero-visual{position:relative}.hero-visual img{display:block;width:100%;border-radius:24px;box-shadow:0 30px 70px #020d1366;border:8px solid #ffffff19;aspect-ratio:1.08;object-fit:cover;object-position:center}.floatbadge{position:absolute;bottom:-15px;left:-24px;background:#e6fff4;color:#085e49;border-radius:13px;padding:15px 19px;font-weight:800;box-shadow:var(--shadow);font-size:13px}.hero-stats{display:flex;gap:20px;margin-top:31px;color:#cde4d9;flex-wrap:wrap;font-size:13px}.hero-stats strong{color:#fff}
.home-section{max-width:1280px;margin:0 auto;padding:63px 32px}.section-top{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:28px}.section-top h2,.home-section h2{font-family:Manrope,sans-serif;font-size:34px;line-height:1.2;letter-spacing:-.045em;margin:0 0 8px}.muted{color:var(--muted)}.search{background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px 16px;width:320px;max-width:100%;outline:none}.chaptergrid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.chapter{background:#fff;border:1px solid var(--border);border-radius:19px;padding:26px 24px 23px;box-shadow:0 5px 20px #021d1310;position:relative;transition:.22s;display:flex;flex-direction:column}.chapter:hover{transform:translateY(-5px);border-color:#75d6b5;box-shadow:var(--shadow);text-decoration:none}.chapter .num{font-weight:800;color:#01875f;font-size:12px;letter-spacing:.08em}.chapter h3{margin:16px 0 8px;font-size:19px;color:#16373c;line-height:1.35;letter-spacing:-.02em}.chapter p{color:#6a7d81;line-height:1.65;margin:0 0 17px;font-size:14px;flex:1}.chapter .read{color:#00865e;font-weight:800;font-size:13px}.features{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.feat{padding:25px;border:1px solid var(--border);background:#fff;border-radius:15px}.feat b{display:block;margin:8px 0}.feat p{font-size:13px;line-height:1.65;color:var(--muted);margin:0}
.pagewrap{display:grid;grid-template-columns:266px minmax(0,860px);gap:48px;max-width:1320px;padding:40px 34px 70px;margin:auto;align-items:start}.sidebar{position:sticky;top:102px;max-height:calc(100vh - 120px);overflow:auto;background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px}.sidebar .side-title{display:block;text-transform:uppercase;font-weight:800;letter-spacing:.13em;color:#879f9e;font-size:11px;margin:0 10px 12px}.sidebar a{display:flex;gap:10px;padding:9px 11px;color:#536d6d;font-size:13px;border-radius:10px;line-height:1.5;font-weight:600}.sidebar a:hover{background:#effaf5;text-decoration:none}.sidebar a.active{background:#e6f7ef;color:#007551;font-weight:800}.sidebar a span{font-size:11px;color:#8ba69c;font-weight:800}.sidebar .side-tip{background:#f1faf6;color:#2b6b55;padding:14px;border-radius:13px;margin-top:20px;font-size:12px;line-height:1.6}.content{min-width:0}.breadcrumbs{font-size:12px;color:#849997;display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}.breadcrumbs a{color:#66817f}.article-head{margin-bottom:35px}.article-head .label{display:inline-flex;background:#e4f7ed;color:#007451;padding:5px 13px;border-radius:99px;font-size:12px;font-weight:800}.article-head h1{font-family:Manrope,sans-serif;font-weight:800;letter-spacing:-.055em;font-size:clamp(34px,4vw,48px);line-height:1.17;margin:17px 0}.article-head p{font-size:18px;color:#607979;line-height:1.7;margin:0}.article-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:17px;color:#7c9492;font-size:12px;font-weight:700}.panel{background:#fff;border:1px solid var(--border);box-shadow:0 7px 20px #02231d08;border-radius:18px;padding:30px;margin-bottom:24px}.panel h2{font-family:Manrope,sans-serif;font-size:26px;line-height:1.33;letter-spacing:-.037em;margin:0 0 15px;color:#12343a}.panel h3{font-size:18px;letter-spacing:-.02em;margin:26px 0 9px;color:#143c41}.panel p{margin:0 0 16px}.panel p:last-child{margin-bottom:0}.panel ul,.panel ol{margin:9px 0 20px;padding-left:24px}.panel li{padding-left:5px;margin-bottom:8px}.panel li::marker{color:#068963;font-weight:700}.panel strong{color:#123f3a}.sectiontag{font-size:11px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:#058765;margin-bottom:7px}.notice{display:flex;gap:13px;margin:20px 0;padding:18px 20px;border:1px solid #bfe4d8;background:#effaf5;border-radius:13px;font-size:14px;line-height:1.65}.notice.warn{background:#fff8e7;border-color:#f0d99d}.notice.danger{background:#fff0ee;border-color:#f8c7b8}.notice b{display:block;margin-bottom:3px}.notice .ico{font-size:20px;line-height:1.4}.code{margin:18px 0 24px;background:#0b1d25;border:1px solid #27414b;border-radius:14px;overflow:hidden}.code-top{background:#172d36;border-bottom:1px solid #28404a;color:#bad4d2;display:flex;justify-content:space-between;align-items:center;padding:10px 17px;gap:10px;font-size:12px;font-weight:800;letter-spacing:.03em}.copy{cursor:pointer;border-radius:7px;border:1px solid #486063;color:#cef7df;background:#223c44;padding:5px 12px;font-size:12px;font-weight:800}.copy:hover{background:#31545b}.code pre{margin:0;padding:19px 21px;overflow-x:auto;color:#dcf7f4;font-size:13px;line-height:1.8;tab-size:2;white-space:pre}.code code{font-family:'Cascadia Code',Consolas,Monaco,monospace}.imgframe{margin:25px 0 27px;position:relative}.imgframe img{width:100%;height:auto;display:block;border-radius:13px 13px 0 0;border:1px solid #dce4e7;cursor:zoom-in;background:#0b151c}.imgframe figcaption{border:1px solid var(--border);border-top:0;background:#f8fbfa;border-radius:0 0 13px 13px;color:#627a7b;padding:12px 16px;font-size:13px;line-height:1.6}.image-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px;font-weight:800;font-size:12px}.image-links a{color:#028763}.diagram{display:flex;gap:7px;flex-wrap:wrap;align-items:center;background:#f2faf7;border:1px dashed #93cbb9;padding:15px;border-radius:12px;margin:18px 0}.diagram span{background:#fff;border:1px solid #d3e6dd;padding:8px 12px;border-radius:8px;font-size:12px;font-weight:800;color:#125142}.diagram i{font-style:normal;color:#0a9870;font-size:19px}.tablewrap{overflow:auto;margin:18px 0}.styled{width:100%;border-collapse:collapse;font-size:14px}.styled th{background:#eaf6f0;color:#185445;font-size:13px;text-align:left}.styled td,.styled th{border:1px solid #d5e5df;padding:12px 14px;vertical-align:top}.styled tr:nth-child(even) td{background:#f9fcfb}.dlcard{display:flex;justify-content:space-between;align-items:center;gap:16px;background:#f8fcfa;border:1px solid #d9ebe3;padding:14px 16px;border-radius:13px;margin:11px 0}.dlcard strong{display:block;color:#1d4843;font-size:14px}.dlcard small{display:block;color:#718885;font-size:12px;line-height:1.5}.dlcard a{font-size:12px;padding:8px 11px;background:#e3f7eb;white-space:nowrap;border-radius:8px;font-weight:800}.checklist{list-style:none;padding:0!important}.checklist li{display:flex;gap:10px;background:#f6fbf8;border:1px solid #e3efe7;padding:13px 15px;border-radius:10px}.checklist input{accent-color:#00875d;margin:5px 0 0 0}.checklist li:has(input:checked){opacity:.63;text-decoration:line-through}.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:28px 0}.article-nav a{border:1px solid var(--border);background:#fff;border-radius:14px;padding:20px;font-size:12px;color:#6e8b86;font-weight:700}.article-nav a strong{font-size:15px;color:#0f5043;display:block;margin-top:5px}.article-nav a:hover{text-decoration:none;border-color:#7acdaa}.article-nav a:last-child{text-align:right}.toc{display:flex;gap:7px;flex-wrap:wrap;margin:22px 0}.toc a{font-size:12px;padding:5px 10px;background:#eaf5ef;border-radius:20px;font-weight:700}
.site-footer{background:#0d252b;color:#b6cccb;margin-top:40px}.site-footer-inner{max-width:1280px;margin:auto;padding:44px 32px;display:flex;align-items:start;justify-content:space-between;gap:40px}.site-footer b{display:block;color:#fff}.site-footer a{color:#89e7b9}.site-footer p{max-width:610px;margin:8px 0;font-size:13px}.footnav{display:flex;gap:20px;flex-wrap:wrap;font-size:13px}.callout{background:#e8f8ef;border:1px solid #c4e6d4;border-radius:20px;padding:35px;display:flex;align-items:center;justify-content:space-between;gap:20px}.callout h2{font-size:26px;margin:0 0 8px}.callout p{margin:0;color:#607c70}
#lightbox{border:0;background:transparent;padding:16px;max-width:97vw;max-height:96vh}#lightbox::backdrop{background:rgba(3,14,20,.89)}#lightbox img{display:block;max-width:92vw;max-height:86vh;object-fit:contain}#lightbox button{display:block;margin:0 0 8px auto;color:#fff;background:#155b45;border:0;padding:7px 14px;border-radius:7px;cursor:pointer}.kbd{font:12px Consolas,monospace;background:#edf4f2;border:1px solid #cfded8;padding:3px 6px;border-radius:4px}
@media(max-width:1090px){.pagewrap{grid-template-columns:220px minmax(0,1fr);gap:22px}.chaptergrid{grid-template-columns:repeat(2,1fr)}.features{grid-template-columns:repeat(2,1fr)}.hero-inner{gap:36px}}
@media(max-width:800px){.sidebar{display:none}.pagewrap{display:block;max-width:840px;padding:27px 17px 50px}.hero-inner{display:block;padding:58px 22px 64px}.hero-visual{max-width:500px;margin:38px auto 0}.header-inner{padding:11px 16px}.menubtn{display:block;margin-left:auto}.headnav{display:none;position:absolute;top:64px;left:10px;right:10px;flex-direction:column;align-items:stretch;gap:6px;background:#fff;border:1px solid #d2e8df;border-radius:12px;padding:15px;box-shadow:var(--shadow)}.headnav.open{display:flex}.headnav a{padding:7px 9px}.home-section{padding:45px 17px}.section-top{align-items:start;flex-direction:column}.search{width:100%}.panel{padding:24px 19px}.site-footer-inner{flex-direction:column}.article-head h1{font-size:34px}}
@media(max-width:540px){.chaptergrid,.features,.article-nav{grid-template-columns:1fr}.hero h1{font-size:42px}.hero p{font-size:16px}.floatbadge{left:8px}.panel h2{font-size:23px}.callout{display:block}.callout .btn{margin-top:15px}.dlcard{align-items:start;flex-direction:column}.diagram{gap:5px}}
@media print{.header,.sidebar,.progress,.article-nav,.site-footer,.copy{display:none!important}.pagewrap{display:block;padding:0}.content{width:100%}.panel{page-break-inside:avoid;box-shadow:none}.code{white-space:pre-wrap}body{background:#fff}}