.article-wrap{width:min(1120px,calc(100% - 32px))}
.article-nav{display:flex;align-items:center;gap:14px;padding:24px 0;color:var(--muted);font-size:.84rem;font-weight:700;text-transform:uppercase}
.back-link{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);border-radius:12px;color:var(--cyan);text-decoration:none;background:var(--panel);font-size:1.2rem;transition:.2s ease}
.back-link:hover{border-color:#61e6ff73;background:#2a4c6fba;transform:translateX(-2px)}
.article-header{padding:54px 0 62px;max-width:920px}
.article-header h1{max-width:900px;margin:12px 0 20px;font-size:clamp(2.6rem,7vw,5.6rem);line-height:.95;letter-spacing:0}
.article-header .intro{max-width:850px;font-size:1.16rem}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.article-meta span{padding:7px 11px;border:1px solid var(--line);border-radius:8px;color:var(--muted);background:rgba(15,30,51,.7);font-size:.78rem;font-weight:700}
.signal-flow{padding:28px;border-block:1px solid var(--line)}
.flow-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}
.flow-heading h2{margin:0;font-size:1.5rem}
.section-kicker{margin:0 0 7px;color:var(--cyan);font-size:.75rem;font-weight:800;text-transform:uppercase}
.flow{display:grid;grid-template-columns:1fr minmax(90px,.35fr) 1fr minmax(90px,.35fr) 1fr;align-items:center}
.flow-node{display:grid;min-height:142px;padding:18px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}
.flow-number{color:var(--cyan);font-size:.76rem;font-weight:800}
.flow-node strong{align-self:end;font-size:1.05rem}
.flow-node small{color:var(--muted)}
.flow-link{height:1px;background:var(--line);position:relative}
.flow-link:after{content:">";position:absolute;right:-2px;top:50%;color:var(--cyan);transform:translateY(-53%);font-size:1.1rem}
.flow-link span{position:absolute;left:50%;bottom:9px;width:max-content;max-width:110px;color:var(--muted);font-size:.7rem;font-weight:700;text-align:center;transform:translateX(-50%)}
.article-layout{display:grid;grid-template-columns:220px minmax(0,760px);justify-content:space-between;gap:70px;padding:68px 0}
.article-content,.article-toc{min-width:0}
.article-toc{position:sticky;top:24px;display:grid;align-content:start;gap:5px;height:max-content;padding-left:16px;border-left:1px solid var(--line)}
.article-toc strong{margin-bottom:10px;color:var(--text);font-size:.8rem;text-transform:uppercase}
.article-toc a{padding:5px 0;color:var(--muted);text-decoration:none;font-size:.84rem;transition:.2s ease}
.article-toc a:hover{color:var(--cyan);transform:translateX(3px)}
.article-content>section{padding:0 0 66px;scroll-margin-top:24px}
.article-content>section+section{padding-top:6px;border-top:1px solid var(--line)}
.article-content h2{margin:0 0 18px;font-size:clamp(1.6rem,4vw,2.35rem);line-height:1.1;letter-spacing:0}
.article-content h3{margin:32px 0 12px;font-size:1.12rem}
.article-content p{margin:0 0 18px;color:var(--muted)}
.article-content code{font:inherit;color:#b9eff8}
.article-content p code,.article-content li code,.article-content td code{padding:2px 5px;border:1px solid var(--line);border-radius:4px;background:#07111f;font-family:"DejaVu Sans Mono","Liberation Mono",monospace;font-size:.88em}
pre{max-width:100%;margin:22px 0;padding:20px;border:1px solid var(--line);border-radius:8px;overflow:auto;color:#c8f4df;background:#050d17;box-shadow:inset 3px 0 0 var(--green)}
pre code{font:13px/1.65 "DejaVu Sans Mono","Liberation Mono",monospace;white-space:pre}
.note{margin:26px 0;padding:18px 20px;border-left:3px solid var(--cyan);background:rgba(23,45,72,.55)}
.note.important{border-left-color:var(--warning)}
.note strong{display:block;margin-bottom:5px;color:var(--text)}
.note p{margin:0}
.check-list{display:grid;gap:11px;margin:20px 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:var(--muted)}
.check-list li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:900}
.warning-list li:before{content:"!";color:var(--warning)}
.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:26px 0}
.scenario{min-width:0;padding:22px;border:1px solid var(--line);border-top:3px solid var(--cyan);border-radius:8px;background:var(--panel)}
.internet-scenario{border-top-color:var(--green)}
.scenario-label{display:inline-block;margin-bottom:18px;color:var(--cyan);font-size:.72rem;font-weight:800;text-transform:uppercase}
.internet-scenario .scenario-label{color:var(--green)}
.scenario h3{margin:0 0 18px}
.scenario dl{display:grid;gap:0;margin:0 0 18px}
.scenario dl div{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px solid var(--line)}
.scenario dt{color:var(--muted);font-size:.8rem}
.scenario dd{margin:0;color:var(--text);font-size:.82rem;font-weight:700;text-align:right}
.scenario p{margin:0;font-size:.88rem}
.scenario-code-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:22px 0}
.scenario-code-grid>div{min-width:0}
.scenario-code-grid>div>strong{display:block;margin-bottom:8px;color:var(--cyan);font-size:.76rem;text-transform:uppercase}
.scenario-code-grid>div+div>strong{color:var(--green)}
.scenario-code-grid pre{height:calc(100% - 26px);margin:0}
.download-list{display:grid;gap:10px;margin-top:24px}
.download-list a{display:flex;align-items:center;gap:18px;padding:17px 18px;border:1px solid var(--line);border-radius:8px;color:var(--text);text-decoration:none;background:var(--panel2);transition:.2s ease}
.download-list a:hover{border-color:#61e6ff73;background:#2a4c6fba;transform:translateY(-2px)}
.download-list strong,.download-list small{display:block}
.download-list small{margin-top:2px;color:var(--muted)}
.download-mark{display:grid;place-items:center;width:38px;height:38px;margin-left:auto;border:1px solid var(--line);border-radius:8px;color:var(--cyan);font-size:1.2rem}
.table-scroll{max-width:100%;margin:22px 0;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.86rem}
th,td{padding:12px 13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--text);background:rgba(15,30,51,.9)}
td{color:var(--muted);background:rgba(15,30,51,.45)}
.exit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:24px 0}
.exit-grid div{padding:18px;border-top:2px solid var(--cyan);background:var(--panel2)}
.exit-grid strong,.exit-grid span{display:block}
.exit-grid strong{font-size:1.5rem}
.exit-grid span{color:var(--muted);font-size:.78rem}
.test-list{display:grid;gap:0;margin:24px 0;padding:0;list-style:none;counter-reset:test}
.test-list li{display:grid;grid-template-columns:44px 1fr;align-items:start;gap:12px;padding:15px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.test-list li span{color:var(--cyan);font-size:.75rem;font-weight:800}
@media(max-width:840px){.article-layout{grid-template-columns:minmax(0,1fr);gap:36px}.article-toc{position:static;grid-template-columns:repeat(3,minmax(0,1fr));padding:16px;border:1px solid var(--line);border-radius:8px}.article-toc strong{grid-column:1/-1}.flow{grid-template-columns:minmax(0,1fr)}.flow-link{width:1px;height:46px;margin:auto}.flow-link:after{content:"v";right:auto;left:50%;top:auto;bottom:-7px;transform:translateX(-50%)}.flow-link span{left:12px;bottom:auto;top:50%;transform:translateY(-50%);text-align:left}.flow-node{min-height:115px}.scenario-code-grid{grid-template-columns:minmax(0,1fr)}}
@media(max-width:560px){.article-header{padding:34px 0 42px}.article-header h1{font-size:2.65rem}.article-header .intro{font-size:1rem}.signal-flow{padding:24px 0}.flow-heading{display:block}.article-layout{padding:44px 0}.article-toc{grid-template-columns:repeat(2,1fr)}.article-content>section{padding-bottom:50px}.scenario-grid{grid-template-columns:minmax(0,1fr)}.exit-grid{grid-template-columns:1fr}.table-scroll{margin-inline:-8px}.download-list a{padding:15px 13px}.download-list small{font-size:.75rem}}