:root {
  --bg: #11161c;
  --bg-soft: #1a212a;
  --bg-panel: #202934;
  --paper: #eef2f5;
  --paper-strong: #ffffff;
  --ink: #17202b;
  --ink-soft: #5d6977;
  --text: #edf1e8;
  --text-soft: rgba(237, 241, 232, 0.74);
  --line: rgba(23, 32, 43, 0.12);
  --line-dark: rgba(237, 241, 232, 0.12);
  --aqua: #32c4bc;
  --gold: #cc9750;
  --coral: #db7567;
  --green: #5ea07d;
  --radius: 8px;
  --shell: 1320px;
  --shadow: 0 26px 70px rgba(17, 22, 28, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(50, 196, 188, 0.08), transparent 32%),
    radial-gradient(circle at 85% 10%, rgba(219, 117, 103, 0.08), transparent 24%),
    linear-gradient(180deg, #f7f9fb 0%, var(--paper) 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.02)),
    linear-gradient(90deg, rgba(17, 22, 28, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(17, 22, 28, 0.03) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0));
}

body.nav-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.14;
  letter-spacing: 0;
}

h1 {
  color: var(--text);
  font-size: clamp(40px, 5.8vw, 72px);
  font-weight: 900;
}

h1 span {
  display: block;
  color: rgba(237, 241, 232, 0.56);
  font-size: 0.5em;
  font-weight: 800;
}

h2 {
  color: var(--ink);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 900;
}

h3 {
  color: var(--ink);
  font-size: 21px;
  font-weight: 850;
}

p + p {
  margin-top: 16px;
}

.shell {
  width: min(100% - 40px, var(--shell));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 8px 12px;
  color: var(--bg);
  background: #fff;
  border-radius: 6px;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--text);
  background: rgba(17, 22, 28, 0.88);
  border-bottom: 1px solid rgba(237, 241, 232, 0.1);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
  box-shadow: 0 18px 48px rgba(17, 22, 28, 0.22);
}

.topbar {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 168px;
}

.brand img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 0 0 1px rgba(237, 241, 232, 0.18);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 19px;
  line-height: 1.05;
}

.brand small {
  margin-top: 2px;
  color: rgba(237, 241, 232, 0.58);
  font-size: 12px;
}

.site-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  position: relative;
  overflow: hidden;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 11px;
  color: rgba(237, 241, 232, 0.76);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 10px 6px;
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(237, 241, 232, 0.08);
  transform: translateY(-1px);
  outline: none;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-download {
  color: #10161d;
  background: var(--gold);
  box-shadow: 0 12px 28px rgba(204, 151, 80, 0.2);
}

.site-nav .nav-download:hover,
.site-nav .nav-download:focus-visible {
  color: #10161d;
  background: #e1b56b;
}

.nav-toggle {
  display: none;
  justify-self: end;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(237, 241, 232, 0.16);
  border-radius: 8px;
  background: rgba(237, 241, 232, 0.06);
}

.nav-toggle span:not(.sr-only) {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transform: translateX(-50%);
  transition: top 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle span:not(.sr-only):nth-child(1) {
  top: 14px;
}

.nav-toggle span:not(.sr-only):nth-child(2) {
  top: 21px;
}

.nav-toggle span:not(.sr-only):nth-child(3) {
  top: 28px;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(1) {
  top: 21px;
  transform: translateX(-50%) rotate(45deg);
}

.nav-toggle.is-open span:not(.sr-only):nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(3) {
  top: 21px;
  transform: translateX(-50%) rotate(-45deg);
}

.page-frame {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 26px;
  padding: 26px 0 84px;
}

.rail {
  align-self: start;
  position: sticky;
  top: 98px;
  display: grid;
  gap: 18px;
}

.rail-block,
.rail-card {
  position: relative;
  padding: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(23, 32, 43, 0.09);
  border-radius: var(--radius);
  box-shadow: 0 14px 36px rgba(17, 22, 28, 0.06);
  backdrop-filter: blur(12px);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.rail-block::before,
.rail-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(50, 196, 188, 0.08), transparent 46%, rgba(219, 117, 103, 0.06));
  opacity: 0;
  transition: opacity 0.24s ease;
  pointer-events: none;
}

.rail-block:hover,
.rail-card:hover {
  transform: translateY(-3px);
  border-color: rgba(50, 196, 188, 0.22);
  box-shadow: 0 20px 46px rgba(17, 22, 28, 0.1);
}

.rail-block:hover::before,
.rail-card:hover::before {
  opacity: 1;
}

.rail-label {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.rail-nav {
  display: grid;
  gap: 6px;
  margin-top: 12px;
}

.rail-nav a {
  position: relative;
  padding: 8px 10px;
  color: var(--ink);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  transition: color 0.2s ease, background 0.2s ease, padding-left 0.2s ease;
}

.rail-nav a:hover,
.rail-nav a:focus-visible {
  color: var(--bg);
  background: rgba(50, 196, 188, 0.12);
  padding-left: 14px;
  outline: none;
}

.rail-card > p {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 4px 9px;
  color: #10161d;
  background: var(--aqua);
  border-radius: 5px;
  font-size: 12px;
  font-weight: 900;
}

.rail-card dl {
  display: grid;
  gap: 10px;
  margin: 0;
}

.rail-card dl div {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.rail-card dt {
  color: var(--ink-soft);
  font-size: 13px;
}

.rail-card dd {
  margin: 0;
  color: var(--ink);
  font-weight: 850;
}

.rail-button {
  display: inline-flex;
  justify-content: center;
  width: 100%;
  margin-top: 16px;
  padding: 11px 16px;
  color: #10161d;
  background: var(--gold);
  border-radius: 8px;
  font-weight: 850;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
  box-shadow: 0 12px 28px rgba(204, 151, 80, 0.18);
}

.rail-button:hover,
.rail-button:focus-visible {
  background: #e1b56b;
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(204, 151, 80, 0.28);
  outline: none;
}

.content-column {
  display: grid;
  gap: 24px;
}

.hero-file,
.panel-section {
  position: relative;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(23, 32, 43, 0.09);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(50, 196, 188, 0.05), transparent 40%, rgba(219, 117, 103, 0.04));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.panel-section:hover::before {
  opacity: 1;
}

.hero-file {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) 420px;
  min-height: 560px;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(17, 22, 28, 0.96) 0%, rgba(17, 22, 28, 0.84) 46%, rgba(17, 22, 28, 0.38) 100%),
    #11161c;
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 1;
}

.hero-copy {
  padding: 52px 52px 44px;
}

.hero-text {
  max-width: 760px;
  margin-top: 22px;
  color: var(--text-soft);
  font-size: 19px;
  line-height: 1.9;
}

.hero-visual {
  margin: 0;
  display: grid;
  align-content: end;
  padding: 28px;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  border-radius: 8px;
  transition: transform 0.45s ease, filter 0.35s ease;
}

.hero-file:hover .hero-visual img {
  transform: scale(1.03);
  filter: saturate(1.04);
}

.hero-visual figcaption {
  margin-top: 12px;
  color: rgba(237, 241, 232, 0.72);
  font-size: 14px;
}

.eyebrow {
  color: var(--aqua);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.tone-gold {
  color: var(--gold);
  font-weight: 900;
}

.tone-aqua {
  color: #159d98;
  font-weight: 900;
}

.tone-coral {
  color: var(--coral);
  font-weight: 900;
}

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

.button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 850;
  line-height: 1.2;
  transition: transform 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 10%, rgba(255, 255, 255, 0.26) 50%, transparent 90%);
  transform: translateX(-135%);
  transition: transform 0.45s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.button:hover::after,
.button:focus-visible::after {
  transform: translateX(135%);
}

.button-primary {
  color: #10161d;
  background: var(--gold);
  box-shadow: 0 14px 30px rgba(204, 151, 80, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #e1b56b;
}

.button-secondary {
  color: var(--text);
  border-color: rgba(237, 241, 232, 0.25);
  background: rgba(237, 241, 232, 0.08);
  backdrop-filter: blur(10px);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(50, 196, 188, 0.42);
  background: rgba(50, 196, 188, 0.12);
}

.signal-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.signal-card {
  position: relative;
  min-height: 118px;
  padding: 18px;
  color: var(--text);
  background: linear-gradient(180deg, #1b242f, #10161d);
  border-radius: var(--radius);
  box-shadow: 0 18px 48px rgba(17, 22, 28, 0.14);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.signal-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(50, 196, 188, 0.18), transparent 48%, rgba(204, 151, 80, 0.16));
  opacity: 0;
  transition: opacity 0.24s ease;
}

.signal-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 58px rgba(17, 22, 28, 0.22);
}

.signal-card:hover::before {
  opacity: 1;
}

.signal-card span,
.signal-card strong {
  display: block;
}

.signal-card span {
  color: var(--aqua);
  font-size: 13px;
  font-weight: 900;
}

.signal-card strong {
  margin-top: 10px;
  color: rgba(237, 241, 232, 0.88);
  font-size: 15px;
  line-height: 1.45;
}

.panel-section {
  padding: 34px;
}

.section-heading {
  max-width: 920px;
  margin-bottom: 28px;
}

.section-heading .eyebrow {
  margin-bottom: 12px;
}

.section-heading > p:not(.eyebrow) {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 17px;
}

.dossier-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}

.story-block {
  color: var(--ink-soft);
  font-size: 17px;
}

.story-figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.story-figure img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.35s ease;
}

.story-figure:hover {
  transform: translateY(-4px);
  border-color: rgba(50, 196, 188, 0.22);
  box-shadow: 0 22px 48px rgba(17, 22, 28, 0.12);
}

.story-figure:hover img {
  transform: scale(1.04);
  filter: saturate(1.04);
}

.story-figure figcaption {
  padding: 12px 14px 14px;
  color: var(--ink-soft);
  font-size: 14px;
}

.fact-strip {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.fact-strip div {
  padding: 16px 18px;
  background: linear-gradient(180deg, rgba(50, 196, 188, 0.07), rgba(255, 255, 255, 0));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.fact-strip div:hover {
  transform: translateY(-3px);
  border-color: rgba(50, 196, 188, 0.24);
  background: linear-gradient(180deg, rgba(50, 196, 188, 0.1), rgba(255, 255, 255, 0.02));
}

.systems-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 24px;
  align-items: start;
}

.systems-list {
  display: grid;
  gap: 14px;
}

.system-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
  padding: 18px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.system-row:hover {
  transform: translateY(-4px);
  border-color: rgba(50, 196, 188, 0.24);
  box-shadow: 0 18px 40px rgba(17, 22, 28, 0.08);
}

.system-row > span {
  color: var(--coral);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.system-row p {
  margin-top: 10px;
  color: var(--ink-soft);
}

.ability-panel {
  overflow: hidden;
  color: var(--text);
  background: linear-gradient(180deg, #1a212a, #11161c);
  border-radius: var(--radius);
  transition: transform 0.26s ease, box-shadow 0.26s ease;
}

.ability-panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 60px rgba(17, 22, 28, 0.26);
}

.ability-panel img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.35s ease;
}

.ability-panel:hover img {
  transform: scale(1.03);
  filter: saturate(1.05);
}

.ability-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.ability-grid div {
  padding: 16px 18px;
  border-top: 1px solid var(--line-dark);
}

.ability-grid h3 {
  color: var(--text);
  font-size: 18px;
}

.ability-grid p {
  margin-top: 8px;
  color: var(--text-soft);
  font-size: 14px;
}

.guide-section {
  background: linear-gradient(180deg, rgba(50, 196, 188, 0.04), rgba(255, 255, 255, 0.84));
}

.guide-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  margin-bottom: 24px;
  align-items: end;
}

.guide-header p:not(.eyebrow) {
  color: var(--ink-soft);
}

.guide-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
}

.guide-tabs {
  display: grid;
  align-content: start;
  gap: 8px;
}

.guide-tab {
  min-height: 50px;
  padding: 12px 14px;
  color: var(--ink-soft);
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  cursor: pointer;
  font-weight: 800;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.guide-tab:hover,
.guide-tab:focus-visible,
.guide-tab.is-active {
  color: var(--ink);
  border-color: rgba(50, 196, 188, 0.5);
  background: rgba(50, 196, 188, 0.1);
  outline: none;
}

.guide-panels {
  padding: 28px;
  background: #11161c;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(237, 241, 232, 0.06);
}

.guide-panel h3 {
  color: var(--text);
  font-size: clamp(25px, 3vw, 34px);
}

.guide-panel p,
.guide-panel li {
  color: var(--text-soft);
}

.guide-panel p {
  margin-top: 16px;
}

.guide-panel ol {
  margin: 22px 0 0;
  padding-left: 20px;
}

.route-tag {
  display: inline-flex;
  margin: 0 2px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 900;
  line-height: 1.45;
}

.route-tag.order {
  color: #0c181c;
  background: #85ece4;
}

.route-tag.free {
  color: #301410;
  background: #f1a39a;
}

.route-tag.balance {
  color: #32240e;
  background: #ecc986;
}

.gallery-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-card {
  margin: 0;
  overflow: hidden;
  background: #11161c;
  border-radius: var(--radius);
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.35s ease;
}

.gallery-card figcaption {
  padding: 14px 16px 16px;
  color: rgba(237, 241, 232, 0.78);
  font-size: 14px;
  line-height: 1.55;
}

.gallery-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 24px 52px rgba(17, 22, 28, 0.22);
}

.gallery-card:hover img {
  transform: scale(1.05);
  filter: saturate(1.05);
}

.updates-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.update-group {
  display: grid;
  gap: 16px;
}

.update-group article {
  position: relative;
  height: 100%;
  padding: 18px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.update-group article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--aqua), var(--gold), var(--coral));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.update-group article:hover {
  transform: translateY(-4px);
  border-color: rgba(50, 196, 188, 0.24);
  box-shadow: 0 18px 40px rgba(17, 22, 28, 0.08);
}

.update-group article:hover::before {
  transform: scaleX(1);
}

.update-group time {
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
}

.update-group h3 {
  margin-top: 6px;
  font-size: 20px;
  line-height: 1.34;
}

.update-group p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
}

.cta-section {
  color: var(--text);
  background: linear-gradient(135deg, #10161d, #18212b);
}

.cta-section h2 {
  color: var(--text);
}

.cta-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
}

.cta-box p:not(.eyebrow) {
  max-width: 720px;
  margin-top: 14px;
  color: var(--text-soft);
}

.faq-cluster {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.faq-item summary {
  position: relative;
  padding: 18px 54px 18px 20px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 850;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  width: 24px;
  height: 24px;
  color: var(--coral);
  font-size: 22px;
  line-height: 22px;
  text-align: center;
  transform: translateY(-50%);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item p {
  padding: 0 20px 20px;
  color: var(--ink-soft);
}

.faq-item:hover,
.faq-item:focus-within,
.faq-item[open] {
  transform: translateY(-3px);
  border-color: rgba(50, 196, 188, 0.24);
  box-shadow: 0 16px 36px rgba(17, 22, 28, 0.08);
}

.site-footer {
  color: var(--text-soft);
  background: #11161c;
}

.footer-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  padding: 38px 0 22px;
  border-bottom: 1px solid rgba(237, 241, 232, 0.1);
}

.footer-bar strong {
  color: var(--text);
  font-size: 18px;
}

.footer-bar p {
  max-width: 680px;
  margin-top: 10px;
  font-size: 14px;
}

.footer-bar nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.footer-bar nav a {
  padding: 6px 10px;
  border: 1px solid rgba(237, 241, 232, 0.12);
  border-radius: 6px;
  font-size: 14px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.footer-bar nav a:hover,
.footer-bar nav a:focus-visible {
  color: var(--text);
  border-color: rgba(50, 196, 188, 0.32);
  background: rgba(237, 241, 232, 0.06);
  outline: none;
}

.footer-note {
  padding: 18px 0 30px;
}

.footer-note p {
  color: rgba(237, 241, 232, 0.54);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1180px) {
  .page-frame {
    grid-template-columns: 1fr;
  }

  .rail {
    position: static;
    grid-template-columns: 1fr 300px;
    align-items: start;
  }

  .hero-file,
  .dossier-layout,
  .systems-layout,
  .guide-header,
  .cta-box {
    grid-template-columns: 1fr;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }

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

  .guide-tab {
    text-align: center;
  }

  .signal-board,
  .gallery-strip,
  .updates-columns {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 780px) {
  .shell {
    width: min(100% - 28px, var(--shell));
  }

  .topbar {
    grid-template-columns: auto auto;
    min-height: 66px;
  }

  .brand img {
    width: 44px;
    height: 44px;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: fixed;
    inset: 66px 14px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: rgba(17, 22, 28, 0.97);
    border: 1px solid rgba(237, 241, 232, 0.16);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    min-height: 44px;
  }

  .page-frame {
    padding: 18px 0 64px;
  }

  .rail,
  .signal-board,
  .fact-strip,
  .guide-tabs,
  .gallery-strip,
  .updates-columns {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-visual,
  .panel-section {
    padding: 24px;
  }

  .hero-visual {
    padding-top: 0;
  }

  .hero-text {
    font-size: 17px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .system-row {
    grid-template-columns: 1fr;
  }

  .cta-box {
    gap: 20px;
  }

  .footer-bar {
    grid-template-columns: 1fr;
  }

  .footer-bar nav {
    justify-content: flex-start;
  }
}

@media (max-width: 460px) {
  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 24px;
  }

  .brand small {
    display: none;
  }

  .rail-card dl div {
    grid-template-columns: 1fr;
  }
}