:root {
  --bg: #071120;
  --bg-soft: #0a1628;
  --panel: #0d1b30;
  --panel-2: #10223b;
  --line: rgba(148, 180, 224, 0.14);
  --text: #f2f7ff;
  --muted: #91a3bd;
  --blue: #2176ff;
  --blue-light: #22b8ee;
  --cyan: #31d7ec;
  --violet: #8a7cff;
  --coral: #ff7665;
  --lime: #b9ed57;
  --header-height: 68px;
  --shell: min(1160px, calc(100% - 48px));
  font-family: Inter, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--header-height) + 18px); }

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  border-radius: 5px;
  background: #fff;
  color: #071120;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }
.section-shell { width: var(--shell); margin: 0 auto; }
.section { padding: 104px 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-height);
  background: rgba(5, 13, 27, 0.94);
  border-bottom: 1px solid rgba(148, 180, 224, 0.12);
  backdrop-filter: blur(16px);
}

.header-shell {
  width: var(--shell);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: inline-flex; align-items: center; gap: 10px; }

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 9px;
  background: linear-gradient(145deg, #1d8aff, #164ec8);
  box-shadow: 0 8px 22px rgba(33, 118, 255, 0.25);
}

.brand-mark img { width: 32px; height: 32px; border-radius: 6px; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy b { font-size: 16px; font-weight: 750; }
.brand-copy small { margin-top: 5px; color: #8297b3; font-size: 12px; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #9cb0cb;
  font-size: 13px;
  font-weight: 600;
}

.site-nav > a:not(.nav-download) {
  position: relative;
  min-height: var(--header-height);
  display: inline-flex;
  align-items: center;
}

.site-nav > a:not(.nav-download)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform 160ms ease;
}

.site-nav > a:hover,
.site-nav > a.is-active { color: #fff; }
.site-nav > a.is-active::after,
.site-nav > a:hover::after { transform: scaleX(1); }

.nav-download {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  border-radius: 6px;
  background: linear-gradient(135deg, #2f8bff, #2356e9);
  color: #fff;
  box-shadow: 0 8px 22px rgba(33, 118, 255, 0.25);
}

.nav-download.is-current { background: linear-gradient(135deg, var(--cyan), #1789d4); }

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  color: #fff;
}

.menu-button svg { width: 21px; height: 21px; }

.hero {
  position: relative;
  isolation: isolate;
  min-height: 650px;
  overflow: hidden;
  display: flex;
  align-items: center;
  background:
    linear-gradient(rgba(49, 215, 236, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 215, 236, 0.025) 1px, transparent 1px),
    radial-gradient(circle at 83% 25%, rgba(33, 118, 255, 0.19), transparent 29%),
    var(--bg);
  background-size: 42px 42px, 42px 42px, auto, auto;
}

.hero-glow {
  position: absolute;
  z-index: -1;
  width: 560px;
  height: 560px;
  right: -180px;
  bottom: -260px;
  border-radius: 50%;
  background: rgba(34, 184, 238, 0.09);
  filter: blur(70px);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(500px, 1.14fr);
  gap: 68px;
  align-items: center;
  padding: 76px 0;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 25px; }

.hero-tags span {
  padding: 5px 10px;
  border: 1px solid rgba(62, 140, 255, 0.28);
  border-radius: 999px;
  background: rgba(33, 118, 255, 0.08);
  color: #9fbcdf;
  font-size: 12px;
  font-weight: 650;
}

.hero-kicker,
.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 12px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 4.3vw, 58px);
  line-height: 1.12;
  font-weight: 800;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
  color: transparent;
  background: linear-gradient(90deg, #30d9ef, #3983ff 76%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-copy {
  max-width: 600px;
  margin: 22px 0 0;
  color: #9db0c8;
  font-size: 15px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  line-height: 1;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover { transform: translateY(-2px); }
.button svg { width: 18px; height: 18px; }

.button-primary {
  background: linear-gradient(135deg, #2688ff, #294fe3);
  color: #fff;
  box-shadow: 0 12px 28px rgba(33, 118, 255, 0.27);
}

.button-primary:hover { box-shadow: 0 16px 34px rgba(33, 118, 255, 0.38); }

.button-secondary {
  border-color: rgba(102, 142, 199, 0.36);
  background: rgba(15, 32, 56, 0.68);
  color: #d7e6fa;
}

.button-secondary:hover { border-color: var(--blue-light); }

.hero-trust {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 18px 0 0;
  color: #627997;
  font-size: 12px;
}

.hero-trust svg { width: 14px; height: 14px; color: #4fc6a5; }
.product-stage { position: relative; padding: 35px 14px 28px 26px; }

.stage-window {
  overflow: hidden;
  border: 1px solid rgba(80, 158, 255, 0.26);
  border-radius: 10px;
  background: #0d1b30;
  box-shadow: 0 35px 70px rgba(0, 0, 0, 0.38), 0 0 70px rgba(33, 118, 255, 0.12);
}

.window-bar {
  height: 38px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 13px;
  border-bottom: 1px solid rgba(148, 180, 224, 0.14);
  color: #6f84a3;
  font-size: 12px;
}

.window-bar > span { display: flex; gap: 5px; }
.window-bar > span i { width: 7px; height: 7px; border-radius: 50%; background: #2f4360; }
.window-bar > span i:nth-child(1) { background: #ff7665; }
.window-bar > span i:nth-child(2) { background: #f3c654; }
.window-bar > span i:nth-child(3) { background: #4fc6a5; }
.window-bar b { color: #9bb0cb; font-weight: 600; }
.window-bar small { justify-self: end; color: #49dcb8; font-size: 12px; }
.stage-window img { width: 100%; height: auto; aspect-ratio: 1022 / 562; object-fit: cover; }

.stage-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 14px;
  border: 1px solid rgba(94, 157, 244, 0.25);
  border-radius: 7px;
  background: rgba(10, 26, 47, 0.94);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.3);
}

.stage-badge strong { color: var(--cyan); font-size: 16px; }
.stage-badge span { color: #8196b3; font-size: 12px; }
.stage-badge > div { display: grid; }
.badge-tools { top: 0; right: 0; display: grid; gap: 0; }
.badge-version { bottom: 0; left: 0; }
.badge-version strong { color: #fff; font-size: 12px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #4ed8a7; box-shadow: 0 0 0 5px rgba(78, 216, 167, 0.1); }

.metrics {
  border-block: 1px solid var(--line);
  background: var(--bg-soft);
}

.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); }

.metrics-grid > div {
  min-height: 106px;
  display: grid;
  place-content: center;
  text-align: center;
  border-left: 1px solid var(--line);
}

.metrics-grid > div:last-child { border-right: 1px solid var(--line); }
.metrics-grid strong { color: var(--cyan); font-size: 25px; line-height: 1.1; }
.metrics-grid span { margin-top: 6px; color: #7186a2; font-size: 12px; }

.section-heading { margin-bottom: 44px; }
.section-heading.centered { max-width: 720px; margin-inline: auto; text-align: center; }
.section-heading.compact { margin-bottom: 32px; }
.section-heading.split { display: grid; grid-template-columns: 1fr minmax(280px, 0.55fr); gap: 60px; align-items: end; }
.section-heading h2, .panel-heading h2 { margin: 0; font-size: clamp(30px, 3.5vw, 44px); line-height: 1.2; }
.section-heading > p:last-child, .panel-heading > p:last-child { margin: 14px 0 0; color: var(--muted); font-size: 13px; }
.section-heading.split > p { margin: 0; color: var(--muted); }

.categories { background: var(--bg); }

.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.category-item {
  position: relative;
  min-height: 200px;
  display: grid;
  align-content: space-between;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(15, 33, 57, 0.92), rgba(9, 23, 41, 0.92));
  transition: transform 170ms ease, border-color 170ms ease, background 170ms ease;
}

.category-item:hover {
  transform: translateY(-4px);
  border-color: rgba(49, 215, 236, 0.35);
  background: var(--panel-2);
}

.category-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
}

.category-icon svg { width: 21px; height: 21px; }
.category-icon.cyan { background: rgba(49, 215, 236, 0.1); color: var(--cyan); }
.category-icon.blue { background: rgba(33, 118, 255, 0.12); color: #4d9bff; }
.category-icon.violet { background: rgba(138, 124, 255, 0.12); color: var(--violet); }
.category-icon.coral { background: rgba(255, 118, 101, 0.1); color: var(--coral); }
.category-icon.lime { background: rgba(185, 237, 87, 0.1); color: var(--lime); }
.category-item h3 { margin: 18px 0 5px; font-size: 16px; }
.category-item p { margin: 0; color: #6f84a0; font-size: 12px; }
.category-item > b { position: absolute; top: 22px; right: 20px; color: #536985; font-family: Consolas, monospace; font-size: 12px; }

.popular-tools { background: var(--bg-soft); border-block: 1px solid var(--line); }
.tool-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }

.tool-row article {
  min-width: 0;
  padding: 20px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.tool-row article > span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: rgba(33, 118, 255, 0.12);
  color: #5ba5ff;
  font-family: Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
}

.tool-row article:nth-child(2n) > span { background: rgba(49, 215, 236, 0.1); color: var(--cyan); }
.tool-row h3 { margin: 14px 0 4px; overflow-wrap: anywhere; font-size: 13px; }
.tool-row p { margin: 0; color: #7186a2; font-size: 12px; }

.benefits { position: relative; overflow: hidden; background: var(--bg); }

.benefits::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  left: -290px;
  top: 20px;
  border-radius: 50%;
  border: 80px solid rgba(33, 118, 255, 0.025);
}

.benefits-layout { display: grid; grid-template-columns: 0.82fr 1.18fr; gap: 110px; }
.benefits-copy { position: sticky; top: 110px; align-self: start; }
.benefits-copy h2 { margin: 0; font-size: clamp(34px, 4vw, 50px); line-height: 1.2; }
.benefits-copy > p:not(.eyebrow) { margin: 20px 0 0; color: var(--muted); }

.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--cyan);
  color: var(--cyan);
  font-weight: 700;
}

.inline-link svg { width: 16px; height: 16px; }
.benefit-list { border-top: 1px solid var(--line); }

.benefit-list article {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 18px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.benefit-list article > span { color: var(--cyan); font-family: Consolas, monospace; font-size: 12px; }
.benefit-list h3 { margin: 0 0 5px; font-size: 18px; }
.benefit-list p { margin: 0; color: var(--muted); font-size: 13px; }

.scenarios { background: var(--bg-soft); border-top: 1px solid var(--line); }
.scenario-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }

.scenario-grid article {
  min-height: 205px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.scenario-grid svg { width: 28px; height: 28px; color: var(--cyan); }
.scenario-grid article:nth-child(2) svg { color: #5b9cff; }
.scenario-grid article:nth-child(3) svg { color: var(--coral); }
.scenario-grid article:nth-child(4) svg { color: var(--violet); }
.scenario-grid article:nth-child(5) svg { color: var(--lime); }
.scenario-grid h3 { margin: 42px 0 7px; font-size: 16px; }
.scenario-grid p { margin: 0; color: var(--muted); font-size: 12px; }

.download-cta {
  position: relative;
  overflow: hidden;
  padding: 72px 0;
  background: linear-gradient(115deg, #0d2a57, #092444 55%, #0a1930);
  border-block: 1px solid rgba(49, 215, 236, 0.2);
}

.cta-grid {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: linear-gradient(rgba(49, 215, 236, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(49, 215, 236, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
}

.cta-content { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-content h2 { margin: 0; font-size: clamp(30px, 4vw, 47px); }
.cta-content p:last-child { margin: 8px 0 0; color: #96add0; }

.faq { background: var(--bg); }
.faq-layout { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: 110px; }
.faq-layout h2 { margin: 0; font-size: clamp(34px, 4vw, 48px); }
.faq-layout > div:first-child > p:last-child { color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }

.faq-list summary {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  color: #dce9fa;
  font-size: 14px;
  font-weight: 650;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { width: 18px; height: 18px; color: #7086a3; transition: transform 160ms ease; }
.faq-list details[open] summary svg { transform: rotate(45deg); color: var(--cyan); }
.faq-list details p { margin: -2px 42px 24px 0; color: var(--muted); font-size: 13px; }

.site-footer { padding: 58px 0; background: #050c17; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 0.7fr 0.8fr 1fr; gap: 54px; }
.footer-about p { max-width: 280px; margin: 18px 0 0; color: #8094ad; font-size: 12px; }
.footer-grid > div:not(.footer-about) { display: grid; align-content: start; justify-items: start; gap: 8px; }
.footer-grid h3 { margin: 0 0 8px; color: #aebed2; font-size: 12px; }
.footer-grid > div:not(.footer-about) > a:not(.footer-download) { color: #8094ad; font-size: 12px; }
.footer-grid > div:not(.footer-about) > a:hover { color: var(--cyan); }
.footer-end { justify-self: end; }
.footer-download { display: inline-flex; align-items: center; gap: 6px; color: var(--cyan); font-weight: 700; }
.footer-download svg { width: 15px; height: 15px; }
.footer-end p { margin: 8px 0 0; color: #7b8fa8; font-size: 12px; }

/* Download page */
.download-page { background: #081322; }

.download-hero {
  position: relative;
  overflow: hidden;
  padding: 70px 0 76px;
  text-align: center;
  background:
    linear-gradient(rgba(49, 215, 236, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 215, 236, 0.03) 1px, transparent 1px),
    linear-gradient(135deg, #0c2f68, #154ee0 58%, #0b72dc);
  background-size: 38px 38px, 38px 38px, auto;
}

.download-orbit { position: absolute; border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 50%; }
.orbit-one { width: 420px; height: 420px; top: -300px; left: -80px; }
.orbit-two { width: 520px; height: 520px; right: -240px; bottom: -390px; }
.download-hero-inner { position: relative; }
.breadcrumbs { display: flex; align-items: center; justify-content: center; gap: 6px; margin-bottom: 22px; color: rgba(255, 255, 255, 0.74); font-size: 12px; }
.breadcrumbs svg { width: 12px; height: 12px; }
.download-hero .eyebrow { color: #a8dbff; }
.download-hero h1 { margin: 0; font-size: clamp(40px, 5vw, 62px); line-height: 1.1; }
.download-hero p:not(.eyebrow) { margin: 13px 0 0; color: #c2dcff; }

.release-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 22px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 12px;
}

.release-pill svg { width: 13px; height: 13px; }

.preflight { padding: 70px 0; background: #f4f7fb; color: #142033; }
.preflight .eyebrow, .download-workspace .eyebrow { color: #155fca; }
.preflight .section-heading h2 { font-size: 30px; }
.preflight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.preflight-grid article {
  position: relative;
  min-height: 205px;
  padding: 26px;
  border: 1px solid #dde5ef;
  border-radius: 9px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(27, 54, 91, 0.05);
}

.preflight-grid article > span { position: absolute; top: 22px; right: 22px; color: #66778c; font-family: Consolas, monospace; font-size: 12px; }
.preflight-grid svg { width: 28px; height: 28px; color: #287cf5; }
.preflight-grid h3 { margin: 25px 0 8px; font-size: 16px; }
.preflight-grid p { margin: 0; color: #627187; font-size: 12px; }

.download-workspace { background: #eaf0f6; color: #142033; }
.download-layout { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 22px; align-items: start; }

.channel-panel,
.release-preview,
.release-info,
.release-log {
  border: 1px solid #dbe4ed;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(31, 58, 91, 0.08);
}

.channel-panel { position: sticky; top: 94px; padding: 25px; }
.panel-heading { margin-bottom: 22px; }
.panel-heading h2 { color: #142033; font-size: 24px; }
.channel-panel .panel-heading > p:not(.eyebrow) { color: #53677d; }
.panel-heading.inline { display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.channel-item {
  min-height: 82px;
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 13px;
  align-items: center;
  margin-top: 10px;
  padding: 13px;
  border: 1px solid #e0e7ef;
  border-radius: 8px;
  color: #142033;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.channel-item:hover { transform: translateY(-2px); border-color: #8db8fb; box-shadow: 0 10px 24px rgba(35, 101, 217, 0.1); }
.channel-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 9px; }
.channel-icon svg { width: 23px; height: 23px; }
.channel-item.xunlei .channel-icon { background: #eaf2ff; color: #287cf5; }
.channel-item.baidu .channel-icon { background: #fff2df; color: #f08b1d; }
.channel-item.quark .channel-icon { background: #e5f9fc; color: #00a9c2; }
.channel-item > span:nth-child(2) { display: grid; }
.channel-item strong { font-size: 14px; }
.channel-item small { margin-top: 3px; color: #52637a; font-size: 12px; }
.channel-item > svg { width: 17px; height: 17px; color: #8c9bae; }

.channel-note {
  display: grid;
  grid-template-columns: 17px 1fr;
  gap: 9px;
  margin-top: 18px;
  padding: 13px;
  border-radius: 7px;
  background: #f0f6fd;
  color: #56687f;
}

.channel-note svg { width: 17px; height: 17px; color: #287cf5; }
.channel-note p { margin: 0; font-size: 12px; overflow-wrap: anywhere; }
.release-content { display: grid; gap: 20px; }
.release-preview { overflow: hidden; margin: 0; }
.preview-bar { min-height: 48px; display: flex; align-items: center; justify-content: space-between; padding: 0 18px; color: #1b2a41; font-size: 13px; font-weight: 700; }
.preview-bar small { color: #5d6d82; font-family: Consolas, monospace; font-size: 12px; }
.release-preview img { width: 100%; height: auto; }
.release-preview figcaption { padding: 11px 18px; color: #586a80; font-size: 12px; }
.release-info, .release-log { padding: 25px; }
.verified { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 999px; background: #eaf8f1; color: #1f7654; font-size: 12px; font-weight: 700; }
.verified svg { width: 14px; height: 14px; }
.release-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; }
.release-specs > div { min-height: 65px; display: grid; align-content: center; gap: 4px; padding: 12px; border-radius: 7px; background: #f5f7fa; }
.release-specs dt { color: #5e6e82; font-size: 12px; }
.release-specs dd { margin: 0; color: #27364a; font-size: 12px; font-weight: 700; }
.release-log ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.release-log li { display: flex; align-items: center; gap: 10px; color: #56677d; font-size: 12px; }
.release-log li svg { flex: 0 0 auto; width: 16px; height: 16px; color: #2bb47b; }

/* Guide page */
.guide-page { background: #eef3f8; }
.guide-hero { padding: 72px 0 78px; background: #0a1b33; text-align: center; }
.guide-hero-inner { max-width: 880px; }
.guide-hero .breadcrumbs { margin-bottom: 28px; }
.guide-hero .eyebrow { color: #79dded; }
.guide-hero h1 { margin: 0; font-size: clamp(40px, 5vw, 60px); line-height: 1.12; }
.guide-hero > .section-shell > p:last-child { max-width: 680px; margin: 18px auto 0; color: #b8cbe3; font-size: 16px; }
.guide-body { padding: 84px 0 96px; background: #f7f9fc; color: #1b2738; }
.guide-layout { display: grid; grid-template-columns: 240px minmax(0, 780px); justify-content: space-between; gap: 92px; align-items: start; }
.guide-toc { position: sticky; top: 100px; padding-right: 28px; border-right: 1px solid #d9e2ec; }
.guide-toc .eyebrow { color: #155fca; }
.guide-toc h2 { margin: 0 0 22px; font-size: 22px; }
.guide-toc nav { display: grid; }
.guide-toc nav a { display: grid; grid-template-columns: 28px 1fr; gap: 9px; padding: 11px 0; border-bottom: 1px solid #e1e8f0; color: #586a80; font-size: 13px; }
.guide-toc nav a:hover { color: #155fca; }
.guide-toc nav span { color: #586a80; font-family: Consolas, monospace; font-size: 12px; }
.guide-download { width: 100%; margin-top: 24px; }
.guide-article { min-width: 0; }
.guide-lead { margin: 0 0 64px; padding-left: 22px; border-left: 4px solid #2176ff; color: #31445b; font-size: 18px; line-height: 1.8; }
.guide-article > section { padding: 0 0 66px; scroll-margin-top: 92px; }
.guide-article > section + section { padding-top: 66px; border-top: 1px solid #dbe3ec; }
.section-index { margin: 0 0 10px; color: #155fca; font-family: Consolas, "SFMono-Regular", monospace; font-size: 12px; font-weight: 700; }
.guide-article h2 { margin: 0 0 20px; color: #101c2d; font-size: clamp(28px, 3vw, 38px); line-height: 1.25; }
.guide-article h3 { color: #142033; }
.guide-article p { color: #506278; }
.guide-article a:not(.button) { color: #155fca; text-decoration: underline; text-underline-offset: 3px; }
.guide-article code { padding: 2px 6px; border: 1px solid #d7e0ea; border-radius: 4px; background: #eef3f8; color: #27384d; font-family: Consolas, monospace; font-size: 0.92em; }
.step-list { display: grid; gap: 0; margin: 28px 0 0; padding: 0; list-style: none; counter-reset: steps; }
.step-list li { position: relative; min-height: 82px; padding: 18px 0 18px 58px; border-top: 1px solid #dbe3ec; counter-increment: steps; }
.step-list li::before { content: counter(steps, decimal-leading-zero); position: absolute; top: 19px; left: 0; color: #2176ff; font-family: Consolas, monospace; font-size: 14px; font-weight: 700; }
.step-list strong, .step-list span { display: block; }
.step-list strong { margin-bottom: 4px; color: #17263a; }
.step-list span { color: #607188; font-size: 14px; }
.guide-figure { overflow: hidden; margin: 30px 0 0; border: 1px solid #d3dee9; border-radius: 7px; background: #fff; }
.guide-figure img { width: 100%; height: auto; }
.guide-figure figcaption { padding: 12px 16px; color: #607188; font-size: 12px; }
.notice { display: grid; grid-template-columns: 20px 1fr; gap: 12px; margin-top: 24px; padding: 18px 20px; border-left: 3px solid #2176ff; background: #eaf2fc; }
.notice svg { width: 20px; height: 20px; margin-top: 3px; color: #155fca; }
.notice p { margin: 0; color: #40556e; font-size: 14px; }
.guide-table-wrap { overflow-x: auto; margin-top: 28px; border-top: 2px solid #2176ff; }
.guide-table-wrap table { width: 100%; min-width: 620px; border-collapse: collapse; text-align: left; }
.guide-table-wrap th, .guide-table-wrap td { padding: 15px 14px; border-bottom: 1px solid #dce4ed; }
.guide-table-wrap th { background: #edf3f9; color: #23354a; font-size: 13px; }
.guide-table-wrap td { color: #53667d; font-size: 13px; }
.guide-table-wrap td:first-child { color: #18283c; font-weight: 700; }
.check-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 28px; border-top: 1px solid #dbe3ec; border-left: 1px solid #dbe3ec; }
.check-grid > div { min-height: 190px; padding: 25px; border-right: 1px solid #dbe3ec; border-bottom: 1px solid #dbe3ec; }
.check-grid svg { width: 23px; height: 23px; color: #2176ff; }
.check-grid h3 { margin: 22px 0 8px; font-size: 16px; }
.check-grid p { margin: 0; font-size: 13px; }
.guide-faq { border-top: 1px solid #ced9e5; }
.guide-faq details { border-bottom: 1px solid #ced9e5; }
.guide-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 21px 0; color: #17263a; cursor: pointer; font-size: 15px; font-weight: 700; list-style: none; }
.guide-faq summary::-webkit-details-marker { display: none; }
.guide-faq summary svg { flex: 0 0 auto; width: 17px; height: 17px; color: #607188; transition: transform 160ms ease; }
.guide-faq details[open] summary svg { transform: rotate(45deg); }
.guide-faq details p { margin: -4px 0 22px; max-width: 680px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px 28px; padding-top: 24px; border-top: 1px solid #dbe3ec; color: #586a80; font-size: 12px; }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta svg { width: 15px; height: 15px; }
.about-hero h1 { font-size: clamp(40px, 5vw, 58px); }
.about-article > section:last-child { padding-bottom: 0; }
.policy-list { display: grid; gap: 0; margin: 28px 0 0; padding: 0; border-top: 1px solid #dbe3ec; list-style: none; }
.policy-list li { display: grid; grid-template-columns: 28px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid #dbe3ec; }
.policy-list svg { width: 23px; height: 23px; color: #2176ff; }
.policy-list strong { color: #17263a; }
.policy-list p { margin: 4px 0 0; font-size: 14px; }

@media (max-width: 1020px) {
  :root { --shell: min(calc(100% - 36px), 820px); }
  .hero-layout { grid-template-columns: 1fr; gap: 38px; }
  .hero-content { max-width: 680px; }
  .product-stage { max-width: 720px; width: 100%; margin: 0 auto; }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .category-item:last-child { grid-column: span 2; }
  .tool-row { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid article:nth-child(4), .scenario-grid article:nth-child(5) { min-height: 170px; }
  .download-layout { grid-template-columns: 290px minmax(0, 1fr); }
  .guide-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 48px; }
}

@media (max-width: 840px) {
  .menu-button { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 0;
    padding: 16px 18px 20px;
    background: rgba(5, 13, 27, 0.99);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 180ms ease, opacity 180ms ease, visibility 180ms ease;
  }

  .site-nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .site-nav > a:not(.nav-download) { min-height: 48px; border-bottom: 1px solid var(--line); }
  .site-nav > a::after { display: none; }
  .site-nav .nav-download { justify-content: center; margin-top: 12px; }
  .benefits-layout, .faq-layout { grid-template-columns: 1fr; gap: 48px; }
  .benefits-copy { position: static; }
  .section-heading.split { grid-template-columns: 1fr; gap: 20px; }
  .download-layout { grid-template-columns: 1fr; }
  .channel-panel { position: static; }
  .channel-panel .panel-heading { text-align: center; }
  .guide-layout { grid-template-columns: 1fr; gap: 54px; }
  .guide-toc { position: static; padding: 0 0 32px; border-right: 0; border-bottom: 1px solid #d9e2ec; }
  .guide-toc nav { grid-template-columns: repeat(2, 1fr); column-gap: 28px; }
  .guide-download { max-width: 240px; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .footer-end { grid-column: 1 / -1; justify-self: start; margin-top: 14px; }
}

@media (max-width: 620px) {
  :root { --header-height: 64px; --shell: calc(100% - 30px); }
  .section { padding: 76px 0; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-mark img { width: 30px; height: 30px; }
  .brand-copy b { font-size: 15px; }
  .hero { min-height: auto; }
  .hero-layout { padding: 60px 0 72px; }
  .hero-tags { margin-bottom: 20px; }
  .hero h1 { font-size: 41px; }
  .hero-copy { font-size: 14px; }
  .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .button { width: 100%; padding: 0 12px; font-size: 13px; }
  .product-stage { padding: 24px 5px 25px 10px; }
  .window-bar { grid-template-columns: auto 1fr auto; }
  .window-bar b { justify-self: center; font-size: 12px; }
  .stage-badge { padding: 8px 10px; }
  .badge-tools { right: 0; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid > div { min-height: 90px; border-bottom: 1px solid var(--line); }
  .metrics-grid > div:nth-child(odd) { border-left: 0; }
  .metrics-grid > div:last-child { border-right: 0; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .category-item { min-height: 180px; padding: 19px; }
  .category-item:last-child { grid-column: auto; }
  .tool-row { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-grid article { min-height: 155px; }
  .scenario-grid h3 { margin-top: 28px; }
  .cta-content { display: grid; }
  .faq-list summary { font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .footer-about { grid-column: 1 / -1; }
  .preflight { padding: 60px 0; }
  .preflight-grid { grid-template-columns: 1fr; }
  .preflight-grid article { min-height: 170px; }
  .download-hero { padding: 56px 0 62px; }
  .download-hero h1 { font-size: 39px; }
  .channel-panel, .release-info, .release-log { padding: 20px; }
  .release-specs { grid-template-columns: repeat(2, 1fr); }
  .guide-hero { padding: 56px 0 64px; }
  .guide-hero h1 { font-size: 38px; }
  .guide-body { padding: 64px 0 72px; }
  .guide-toc nav { grid-template-columns: 1fr; }
  .guide-download { max-width: none; }
  .guide-lead { margin-bottom: 52px; font-size: 16px; }
  .guide-article > section { padding-bottom: 52px; }
  .guide-article > section + section { padding-top: 52px; }
  .check-grid { grid-template-columns: 1fr; }
  .check-grid > div { min-height: 160px; }
}

@media (max-width: 380px) {
  .hero h1 { font-size: 35px; }
  .hero-actions { grid-template-columns: 1fr; }
  .download-hero h1 { font-size: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}