/* ==========================================================================
   MANBETX 手机官方中文站 — Shared Site CSS
   File: /assets/site.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-space: #0A0F24;
  --color-orange: #FF6B2C;
  --color-silver: #C0C7D8;
  --color-midnight: #111A3D;
  --color-electric: #00C2FF;
  --color-fog: #F5F7FA;
  --color-gray: #9BA3B5;
  --color-gold: #F5C24B;
  --color-danger: #FF3B30;
  --color-success: #34C759;

  /* Typography */
  --font-headline: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "IBM Plex Mono", "SF Mono", "SFMono-Regular", Consolas, "Liberation Mono", "PingFang SC", "Microsoft YaHei", monospace;

  /* Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;

  /* Layout */
  --header-width: 280px;
  --header-height-mobile: 64px;
  --content-gutter: clamp(1.25rem, 4vw, 2.5rem);
  --container-max: 1400px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-standard: 0.3s ease;
  --transition-slow: 0.6s ease-out;

  /* Z-index layers */
  --z-header: 100;
  --z-progress: 200;
  --z-skip-link: 300;

  /* Radius */
  --radius-s: 2px;
  --radius-m: 6px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-float: 0 8px 32px rgba(0, 0, 0, 0.45);
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  background-color: var(--color-space);
  color: var(--color-fog);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: grid;
  grid-template-columns: var(--header-width) minmax(0, 1fr);
  grid-template-rows: 1fr auto;
  min-height: 100vh;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

a {
  color: var(--color-electric);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-orange);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-fog);
}

::selection {
  background: var(--color-orange);
  color: var(--color-space);
}

:focus-visible {
  outline: 2px solid var(--color-electric);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

/* --------------------------------------------------------------------------
   3. Layout shell
   -------------------------------------------------------------------------- */
#main-content,
.site-footer {
  grid-column: 2;
  min-width: 0;
}

#main-content {
  grid-row: 1;
}

.site-footer {
  grid-row: 2;
}

.skip-link {
  position: fixed;
  top: 0;
  left: var(--header-width);
  transform: translateY(-200%);
  z-index: var(--z-skip-link);
  padding: 0.75rem 1.5rem;
  background: var(--color-orange);
  color: var(--color-space);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  transition: transform var(--transition-fast);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: none;
  color: var(--color-space);
}

/* --------------------------------------------------------------------------
   4. Header
   -------------------------------------------------------------------------- */
.site-header {
  grid-column: 1;
  grid-row: 1 / -1;
  position: sticky;
  top: 0;
  height: 100vh;
  background:
    linear-gradient(180deg, rgba(0, 194, 255, 0.04), transparent 240px),
    var(--color-space);
  border-right: 1px solid rgba(0, 194, 255, 0.15);
  z-index: var(--z-header);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.25rem 1rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.header-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-symbol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-orange) 0%, #ff8b55 100%);
  color: var(--color-space);
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.5rem;
  border-radius: var(--radius-s);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2) inset, var(--shadow-card);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--color-fog);
}

.brand-sub {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--color-gray);
  margin-top: 0.1rem;
}

.brand:hover .brand-name {
  color: var(--color-orange);
}

/* Nav toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(192, 199, 216, 0.25);
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-electric);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 20px;
  height: 16px;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: var(--color-fog);
  transition: transform var(--transition-standard), opacity var(--transition-standard);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navigation */
.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.72rem 0.9rem;
  border-left: 3px solid transparent;
  color: var(--color-silver);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  background: transparent;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-fog);
  background: rgba(0, 194, 255, 0.06);
  border-left-color: var(--color-electric);
}

.nav-link[aria-current="page"] {
  color: var(--color-orange);
  border-left-color: var(--color-orange);
  font-weight: 700;
  background: linear-gradient(90deg, rgba(255, 107, 44, 0.1), transparent);
}

.nav-index {
  min-width: 1.5rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-gray);
  opacity: 0.7;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--color-orange);
  opacity: 1;
}

.nav-text {
  white-space: nowrap;
}

/* Nav utility area */
.nav-utility {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(192, 199, 216, 0.12);
}

.nav-utility-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  color: var(--color-silver);
  font-size: var(--text-sm);
  border-radius: var(--radius-s);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-utility-link:hover {
  color: var(--color-fog);
  background: rgba(0, 194, 255, 0.05);
}

.nav-utility-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(52, 199, 89, 0.55);
  flex-shrink: 0;
}

.nav-utility-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  background: var(--color-orange);
  color: var(--color-space);
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: var(--radius-s);
  box-shadow: 0 2px 12px rgba(255, 107, 44, 0.25);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-utility-cta:hover {
  background: #ff8b55;
  color: var(--color-space);
  transform: translateY(-1px);
}

/* Header footer */
.header-footer {
  padding-top: 1rem;
  margin-top: 1rem;
}

.data-stream {
  position: relative;
  overflow: hidden;
  height: 2px;
  border-radius: 1px;
  background: rgba(192, 199, 216, 0.12);
}

.data-stream-bar {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -40%;
  width: 40%;
  background: linear-gradient(90deg, transparent, var(--color-electric), var(--color-orange), transparent);
  animation: data-stream-flow 2.8s linear infinite;
}

@keyframes data-stream-flow {
  0% {
    left: -40%;
  }
  100% {
    left: 100%;
  }
}

.header-icp {
  margin-top: 0.6rem;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: rgba(155, 163, 181, 0.5);
  text-align: center;
}

/* Scroll progress */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(192, 199, 216, 0.1);
  pointer-events: none;
  z-index: var(--z-progress);
}

.scroll-progress-fill {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-electric), var(--color-orange));
  box-shadow: 0 0 8px rgba(0, 194, 255, 0.5);
  transition: width 0.08s linear;
}

/* Header backdrop (mobile) */
.header-backdrop {
  display: none;
}

/* --------------------------------------------------------------------------
   5. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  background:
    linear-gradient(180deg, rgba(0, 194, 255, 0.02), transparent 200px),
    var(--color-midnight);
  border-top: 1px solid rgba(0, 194, 255, 0.12);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 194, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 194, 255, 0.035) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.footer-inner {
  position: relative;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--content-gutter);
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand-symbol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--color-orange);
  color: var(--color-space);
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.3rem;
  border-radius: var(--radius-s);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2) inset;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.footer-brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.footer-brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--color-fog);
}

.footer-brand-sub {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--color-gray);
  margin-top: 0.1rem;
}

.footer-trust {
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-gray);
  max-width: 30em;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.footer-contact-line {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: var(--text-sm);
  color: var(--color-silver);
  line-height: 1.6;
}

.footer-contact-label {
  flex-shrink: 0;
  min-width: 3.5em;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-column-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-electric);
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(192, 199, 216, 0.12);
}

.footer-column-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-column-list a {
  display: inline-block;
  padding: 0.2rem 0;
  color: var(--color-silver);
  font-size: var(--text-sm);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-column-list a:hover {
  color: var(--color-orange);
  transform: translateX(4px);
}

.footer-bottom {
  position: relative;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 1.5rem var(--content-gutter) 2rem;
  border-top: 1px solid rgba(192, 199, 216, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copyright,
.footer-service-time {
  font-size: var(--text-xs);
  color: rgba(155, 163, 181, 0.7);
}

/* --------------------------------------------------------------------------
   6. Shared components
   -------------------------------------------------------------------------- */

/* Container */
.container {
  width: min(var(--container-max), 100%);
  margin-inline: auto;
  padding-inline: var(--content-gutter);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
  background: var(--color-orange);
  color: var(--color-space);
  box-shadow: 0 2px 14px rgba(255, 107, 44, 0.2);
}

.btn-primary:hover {
  background: #ff8b55;
  color: var(--color-space);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255, 107, 44, 0.3);
}

.btn-outline {
  background: transparent;
  border-color: rgba(192, 199, 216, 0.4);
  color: var(--color-silver);
}

.btn-outline:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  transform: translateY(-2px);
}

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  background: rgba(0, 194, 255, 0.08);
  border: 1px solid rgba(0, 194, 255, 0.28);
  color: var(--color-electric);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.tag--hot {
  background: rgba(255, 107, 44, 0.08);
  border-color: rgba(255, 107, 44, 0.3);
  color: var(--color-orange);
}

.tag--gold {
  background: rgba(245, 194, 75, 0.08);
  border-color: rgba(245, 194, 75, 0.3);
  color: var(--color-gold);
}

/* Cards */
.card {
  position: relative;
  background: var(--color-midnight);
  border: 1px solid rgba(192, 199, 216, 0.14);
  border-radius: var(--radius-m);
  padding: clamp(1.25rem, 2.5vw, 2rem);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-standard), border-color var(--transition-standard), box-shadow var(--transition-standard);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 194, 255, 0.3);
  box-shadow: var(--shadow-float);
}

/* Chapter & section header */
.chapter {
  position: relative;
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.chapter-index {
  position: absolute;
  top: 1rem;
  right: 0;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(4rem, 9vw, 7.5rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 107, 44, 0.35);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-electric);
}

.section-eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  background: var(--color-orange);
}

.section-title {
  position: relative;
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-fog);
}

.section-lead {
  position: relative;
  margin-top: 1rem;
  max-width: 42em;
  color: var(--color-gray);
  font-size: var(--text-base);
  line-height: 1.8;
}

/* Layout grid */
.layout-grid {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.layout-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.layout-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.layout-grid > * {
  grid-column: span 12;
}

.layout-grid--2 > * {
  grid-column: span 1;
}

.layout-grid--3 > * {
  grid-column: span 1;
}

/* Media frames */
.media-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-midnight);
  border: 1px solid rgba(192, 199, 216, 0.15);
  border-radius: var(--radius-m);
}

.media-frame::after {
  content: attr(data-media-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(0, 194, 255, 0.05), transparent 60%),
    var(--color-midnight);
  color: var(--color-gray);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 0;
}

.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

.media-frame--tall {
  aspect-ratio: 3 / 4;
}

.media-frame--hero {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-s);
}

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 1.1rem;
  background: transparent;
  border: 1px solid rgba(192, 199, 216, 0.25);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-gray);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-electric);
  color: var(--color-electric);
}

.filter-btn.is-active {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-space);
  font-weight: 700;
}

[data-hidden="true"] {
  display: none !important;
}

/* Data table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid rgba(0, 194, 255, 0.25);
  color: var(--color-electric);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--text-xs);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(192, 199, 216, 0.1);
  color: var(--color-silver);
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(0, 194, 255, 0.04);
}

.data-table td strong {
  color: var(--color-fog);
}

/* Stat block */
.stat-block {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-midnight);
  border: 1px solid rgba(192, 199, 216, 0.15);
  border-left: 3px solid var(--color-orange);
  border-radius: var(--radius-s);
}

.stat-value {
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-fog);
}

.stat-label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: var(--color-gray);
}

.breadcrumb a {
  color: var(--color-electric);
}

.breadcrumb a:hover {
  color: var(--color-orange);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(155, 163, 181, 0.5);
}

/* Print border label */
.print-border {
  position: relative;
  padding: 1.5rem;
  background: rgba(17, 26, 61, 0.6);
  border: 1px solid rgba(192, 199, 216, 0.22);
  border-radius: var(--radius-s);
}

.print-border::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(192, 199, 216, 0.08);
  border-radius: var(--radius-s);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   7. Utilities
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Reveal on scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   8. Responsive — mobile / tablet
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  body {
    display: block;
  }

  #main-content,
  .site-footer {
    margin-left: 0;
  }

  #main-content {
    padding-top: var(--header-height-mobile);
  }

  .skip-link {
    left: 0;
    top: 0;
  }

  /* Header as top bar */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--header-height-mobile);
    border-right: none;
    border-bottom: 1px solid rgba(0, 194, 255, 0.18);
    background: rgba(10, 15, 36, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    gap: 1rem;
  }

  .header-topline {
    margin-bottom: 0;
    min-width: 0;
  }

  .brand-symbol {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }

  .brand-name {
    font-size: 0.95rem;
  }

  .brand-sub {
    font-size: 0.6rem;
  }

  .nav-toggle {
    display: flex;
    flex-shrink: 0;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height-mobile);
    bottom: 0;
    left: 0;
    width: min(320px, 85vw);
    background: var(--color-midnight);
    transform: translateX(-105%);
    transition: transform var(--transition-standard);
    overflow-y: auto;
    padding: 1.5rem 1.25rem;
    border-right: 1px solid rgba(0, 194, 255, 0.2);
    z-index: calc(var(--z-header) - 1);
    box-shadow: var(--shadow-float);
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .site-nav {
    -webkit-overflow-scrolling: touch;
  }

  .nav-link {
    padding: 0.9rem 0.75rem;
    font-size: var(--text-base);
  }

  .nav-utility {
    margin-top: 2rem;
  }

  .header-footer {
    display: none;
  }

  .scroll-progress {
    position: fixed;
  }

  .header-backdrop {
    display: block;
    position: fixed;
    inset: var(--header-height-mobile) 0 0 0;
    background: rgba(10, 15, 36, 0.65);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-standard), visibility var(--transition-standard);
    z-index: calc(var(--z-header) - 2);
  }

  .header-backdrop[data-open] {
    opacity: 1;
    visibility: visible;
  }

  /* Footer stacking */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-service-time {
    margin-top: 0.25rem;
  }
}

@media (max-width: 640px) {
  .layout-grid--2,
  .layout-grid--3 {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .footer-column-title {
    margin-bottom: 0.3rem;
  }

  .footer-column-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
  }

  .brand-copy .brand-sub {
    display: block;
    max-width: 8em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .data-table th,
  .data-table td {
    padding: 0.6rem 0.6rem;
  }

  .section-lead {
    font-size: var(--text-sm);
  }
}

/* --------------------------------------------------------------------------
   9. Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .data-stream-bar {
    animation: none;
    left: 0;
    width: 100%;
    background: linear-gradient(90deg, var(--color-electric), var(--color-orange));
  }

  .card:hover,
  .nav-utility-cta:hover,
  .btn-primary:hover,
  .btn-outline:hover {
    transform: none;
  }
}