:root {
  color-scheme: light;
  --ink: #18233b;
  --muted: #637087;
  --line: #e3e8ef;
  --paper: #fff;
  --canvas: #f4f6f8;
  --green: #278558;
  --green-pale: #e9f5ee;
  --blue: #315ee8;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.55 Inter, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.guide { max-width: 1120px; margin: 32px auto; padding: 0 42px 22px; }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 18px;
  color: #344054;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}
.back-link span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
  font-size: 18px;
}
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  min-height: 410px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: white;
}
.hero-copy { z-index: 1; align-self: center; padding: 46px 14px 38px 52px; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0;
  text-transform: uppercase;
}
.hero .eyebrow { display: flex; align-items: center; gap: 9px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #35a06a; box-shadow: 0 0 0 4px #e5f4eb; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 0 0 17px; font-size: 43px; font-weight: 760; line-height: 1.08; letter-spacing: 0; }
h1 span { color: var(--green); }
.intro { max-width: 500px; margin: 0 0 24px; color: #56647a; font-size: 16px; line-height: 1.62; }
.model-line { display: flex; align-items: center; gap: 12px; }
.model-mark { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 10px; background: #fff8ce; color: #312900; font-size: 20px; font-weight: 850; }
.model-line strong, .model-line small { display: block; }
.model-line strong { font-size: 14px; }
.model-line small { margin-top: 2px; color: var(--muted); font-size: 12px; }
.hero-art {
  position: relative;
  display: grid;
  min-height: 360px;
  place-items: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 60% 47%, #fff8c8 0, #fffbe5 26%, #f4f7f4 63%, #eef3f2 100%);
}
.art-orbit { position: absolute; border: 1px solid #b3d6c45c; border-radius: 50%; transform: rotate(-20deg); }
.orbit-one { width: 440px; height: 228px; }
.orbit-two { width: 510px; height: 288px; border-color: #cfd9e0; transform: rotate(24deg); }
.router-product { position: relative; z-index: 1; display: block; width: min(84%, 360px); max-height: 340px; object-fit: contain; filter: drop-shadow(0 26px 18px #17233838); }
.signal { position: absolute; z-index: 2; display: flex; align-items: center; gap: 3px; transform: rotate(-28deg); }
.signal-a { top: 82px; right: 94px; }
.signal-b { bottom: 91px; left: 62px; transform: rotate(38deg); }
.signal span { display: block; border: 2px solid #4caa76; border-bottom-color: transparent; border-left-color: transparent; border-radius: 0 100% 0 0; transform: rotate(-45deg); }
.signal span:nth-child(1) { width: 14px; height: 14px; }
.signal span:nth-child(2) { width: 24px; height: 24px; opacity: .75; }
.signal span:nth-child(3) { width: 34px; height: 34px; opacity: .5; }
.art-caption { position: absolute; right: 24px; bottom: 22px; display: flex; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid #e5e9e6; border-radius: 10px; background: white; box-shadow: 0 9px 28px #1e332212; }
.caption-check { display: grid; width: 25px; height: 25px; place-items: center; border-radius: 50%; background: var(--green-pale); color: var(--green); font-weight: 800; }
.art-caption b, .art-caption small { display: block; }
.art-caption b { font-size: 12px; }
.art-caption small { margin-top: 1px; color: var(--muted); font-size: 10px; }
.hero-bottom { position: absolute; bottom: 20px; left: 52px; display: flex; gap: 22px; }
.step-chip { display: flex; align-items: center; gap: 8px; color: #516078; font-size: 11px; font-weight: 650; }
.step-chip i { width: 4px; height: 4px; border-radius: 50%; background: #87a897; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-head .eyebrow { margin-bottom: 7px; }
h2 { margin: 0; font-size: 27px; font-weight: 730; line-height: 1.2; letter-spacing: 0; }
.time-badge { padding: 7px 11px; border: 1px solid var(--line); border-radius: 7px; background: white; color: #59677d; font-size: 12px; }
.quick-start, .network-section, .interface-section, .help-section { margin-top: 48px; }
.steps-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.step-card { position: relative; min-width: 0; overflow: hidden; padding: 22px 21px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.step-number { position: absolute; top: 18px; right: 19px; color: #a0a9b7; font-size: 12px; font-weight: 750; }
.step-icon { display: grid; width: 43px; height: 43px; place-items: center; margin-bottom: 16px; border-radius: 11px; }
.step-icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-cable { background: #eaf0ff; color: var(--blue); }
.icon-power { background: #fff5d6; color: #886b00; }
.icon-wifi { background: #e8f5ed; color: var(--green); }
.step-card h3 { margin: 0 0 9px; font-size: 17px; line-height: 1.25; }
.step-card > p { min-height: 80px; margin: 0; color: #5c687b; font-size: 13px; line-height: 1.55; }
.step-figure { margin: 14px 0 0; }
.step-figure img { display: block; width: 100%; height: auto; }
.wait-display { display: flex; min-height: 57px; align-items: center; gap: 11px; margin-top: 19px; padding: 10px; border: 1px solid #eceff2; border-radius: 8px; background: #f6f7f9; }
.wait-ring { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid #e6eaf0; border-radius: 50%; background: white; color: #69778b; }
.wait-ring svg, .wifi-symbol svg, .lock-mark svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.wait-display b, .wait-display small, .wifi-preview b, .wifi-preview small { display: block; }
.wait-display b, .wifi-preview b { font-size: 11px; }
.wait-display small, .wifi-preview small { margin-top: 2px; color: var(--muted); font-size: 10px; }
.wifi-preview { display: flex; min-height: 57px; align-items: center; gap: 10px; margin-top: 19px; padding: 9px 10px; border: 1px solid #e4eee7; border-radius: 8px; background: #f6faf7; }
.wifi-symbol { display: grid; width: 34px; height: 34px; place-items: center; border: 1px solid #e3ece6; border-radius: 8px; background: white; color: var(--green); }
.lock-mark { margin-left: auto; color: #859184; }
.lock-mark svg { width: 16px; height: 16px; }
.ready-banner { display: flex; align-items: center; gap: 13px; margin-top: 15px; padding: 15px 18px; border: 1px solid #d7eadf; border-radius: 10px; background: #edf7f0; }
.ready-icon { display: grid; width: 27px; height: 27px; flex: none; place-items: center; border-radius: 50%; background: var(--green); color: white; font-size: 15px; font-weight: 700; }
.ready-banner p { display: grid; gap: 1px; margin: 0; font-size: 13px; }
.ready-banner p span { color: #586a60; }
.network-section { padding: 28px 30px; border: 1px solid var(--line); border-radius: 14px; background: white; }
.network-section .section-head { align-items: center; margin-bottom: 12px; }
.shield-mark { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 11px; background: #e9f5ee; color: var(--green); }
.shield-mark svg, .safety-icon svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.network-lead { max-width: 870px; margin: 0 0 20px; color: #5d697c; font-size: 14px; line-height: 1.65; }
.features-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding-top: 18px; border-top: 1px solid #edf0f3; }
.features-row > div { display: flex; align-items: flex-start; gap: 9px; }
.feature-check { display: grid; width: 19px; height: 19px; flex: none; place-items: center; border-radius: 50%; background: #e8f5ed; color: var(--green); font-size: 12px; font-weight: 800; }
.features-row b, .features-row small { display: block; }
.features-row b { font-size: 12px; }
.features-row small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.screens-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.screen-card { min-width: 0; overflow: hidden; margin: 0; border: 1px solid var(--line); border-radius: 10px; background: white; }
.screen-card img { display: block; width: 100%; height: auto; border-bottom: 1px solid var(--line); background: #eff3f7; }
.screen-card figcaption { display: flex; align-items: center; gap: 10px; padding: 12px 14px; }
.screen-card figcaption > span { display: grid; width: 27px; height: 27px; flex: none; place-items: center; border-radius: 7px; background: #edf1ff; color: var(--blue); font-size: 10px; font-weight: 750; }
.screen-card figcaption b, .screen-card figcaption small { display: block; }
.screen-card figcaption b { font-size: 12px; }
.screen-card figcaption small { margin-top: 2px; color: var(--muted); font-size: 10px; }
.screen-note { display: flex; align-items: flex-start; gap: 9px; margin: 13px 0 0; color: #707c8e; font-size: 11px; line-height: 1.5; }
.screen-note > span { display: grid; width: 17px; height: 17px; flex: none; place-items: center; border: 1px solid #c8ced8; border-radius: 50%; font-size: 10px; }
.help-section { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 28px; padding: 28px 30px; border-radius: 14px; background: #1f2c40; color: white; }
.help-copy .eyebrow { color: #8dd2a8; }
.help-copy h2 { margin-bottom: 12px; font-size: 25px; }
.help-copy > p:not(.eyebrow) { max-width: 510px; margin: 0 0 10px; color: #c5ced8; font-size: 13px; line-height: 1.6; }
.help-button { display: inline-flex; align-items: center; gap: 15px; margin-top: 9px; padding: 10px 14px; border-radius: 7px; background: white; color: #1c2a3e; font-size: 12px; font-weight: 700; text-decoration: none; }
.help-button span { font-size: 15px; }
.safety-note { display: flex; gap: 12px; padding: 19px; border: 1px solid #3c4a5f; border-radius: 10px; background: #2a394f; }
.safety-icon { display: grid; width: 35px; height: 35px; flex: none; place-items: center; border-radius: 9px; background: #3b4b5c; color: #f1cd66; }
.safety-note h3 { margin: 1px 0 7px; font-size: 13px; }
.safety-note p { margin: 0 0 8px; color: #c3ccd7; font-size: 11px; line-height: 1.55; }
.safety-note p:last-child { margin-bottom: 0; }
.safety-note b { color: white; }
.guide-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 24px; padding: 19px 2px 0; border-top: 1px solid #dde3e9; color: #778397; font-size: 11px; }
.guide-footer a { color: #57647a; text-decoration: none; }
.footer-brand { color: #26334a !important; font-size: 16px; font-weight: 800; }
.footer-brand span { margin-left: 2px; color: var(--green); font-size: 9px; letter-spacing: 0; }

@media (max-width: 820px) {
  .guide { margin-top: 20px; padding: 0 22px 20px; }
  .hero { grid-template-columns: 1.05fr .95fr; min-height: 370px; }
  .hero-copy { padding: 38px 0 44px 32px; }
  h1 { font-size: 36px; }
  .intro { font-size: 14px; }
  .hero-art { min-height: 320px; }
  .router-product { width: min(88%, 320px); }
  .hero-bottom { left: 32px; gap: 14px; }
  .steps-grid { gap: 10px; }
  .step-card { padding: 18px 15px 15px; }
  .step-card > p { min-height: 106px; font-size: 12px; }
  .network-section { padding: 24px; }
  .help-section { gap: 18px; padding: 24px; }
  .screens-grid { gap: 10px; }
}

@media (max-width: 620px) {
  .guide { margin: 12px auto; padding: 0 15px 18px; }
  .back-link { margin: 1px 0 12px; }
  .hero { display: flex; min-height: 0; flex-direction: column; }
  .hero-copy { padding: 26px 21px 8px; }
  .hero .eyebrow { margin-bottom: 12px; font-size: 10px; }
  h1 { font-size: 34px; line-height: 1.08; }
  .intro { margin-bottom: 16px; font-size: 14px; line-height: 1.55; }
  .model-line { padding-bottom: 3px; }
  .hero-art { min-height: 242px; margin: 0 12px 80px; overflow: visible; border-radius: 10px; }
  .router-product { width: min(78%, 215px); max-height: 210px; }
  .orbit-one { width: 310px; height: 158px; }
  .orbit-two { width: 360px; height: 205px; }
  .signal-a { top: 50px; right: 40px; }
  .signal-b { bottom: 48px; left: 40px; }
  .art-caption { right: 10px; bottom: -28px; padding: 8px 10px; }
  .hero-bottom { right: 21px; bottom: 15px; left: 21px; justify-content: space-between; gap: 5px; }
  .step-chip { gap: 5px; font-size: 10px; }
  .quick-start, .network-section, .interface-section, .help-section { margin-top: 34px; }
  .section-head { align-items: flex-start; margin-bottom: 16px; }
  h2 { font-size: 23px; }
  .time-badge { padding: 6px 8px; font-size: 10px; white-space: nowrap; }
  .steps-grid { grid-template-columns: 1fr; gap: 9px; }
  .step-card { padding: 17px 17px 16px; }
  .step-icon { width: 38px; height: 38px; margin-bottom: 12px; }
  .step-card > p { min-height: 0; font-size: 13px; }
  .step-figure { max-width: 420px; margin: 11px auto 0; }
  .wait-display, .wifi-preview { margin-top: 14px; }
  .ready-banner { align-items: flex-start; padding: 13px; }
  .ready-banner p { font-size: 12px; }
  .network-section { padding: 20px 17px; }
  .network-section .section-head { align-items: center; }
  .network-lead { margin-bottom: 16px; font-size: 13px; }
  .features-row { grid-template-columns: 1fr; gap: 14px; }
  .features-row small { font-size: 11px; }
  .screens-grid { grid-template-columns: 1fr; gap: 11px; }
  .screen-card { display: grid; grid-template-columns: 1fr .85fr; align-items: center; }
  .screen-card img { height: 100%; border-right: 1px solid var(--line); border-bottom: 0; object-fit: cover; object-position: left top; }
  .screen-card figcaption { padding: 12px 10px; }
  .screen-card figcaption b { font-size: 11px; }
  .screen-card figcaption small { font-size: 9px; }
  .help-section { grid-template-columns: 1fr; gap: 18px; padding: 22px 18px; }
  .help-copy h2 { font-size: 23px; }
  .safety-note { padding: 15px; }
  .guide-footer { flex-wrap: wrap; justify-content: flex-start; gap: 10px 16px; font-size: 10px; }
  .guide-footer > span { order: 3; flex-basis: 100%; }
}

@media print {
  body { background: white; }
  .guide { max-width: none; margin: 0; padding: 0; }
  .back-link, .hero-bottom { display: none; }
  .hero, .step-card, .network-section, .help-section { break-inside: avoid; }
  .hero { min-height: 340px; }
  .help-section { background: #1f2c40 !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .screens-grid { grid-template-columns: repeat(3, 1fr); }
  a { color: inherit; }
}