/* ==============================================
   九游竞界 JIUYOU WORLD — Shared Site CSS
   赛博竞技 · 技术蓝图 · 数据竞技场
   ============================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #0A1E3C;
  background: #F5F7FA;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.nav-open {
  overflow: hidden;
}

main {
  flex: 1 0 auto;
}

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

a {
  color: inherit;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

::selection {
  background: #FF6B00;
  color: #FFFFFF;
}

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #0A1E3C;
  --color-primary-light: #132B52;
  --color-accent: #FF6B00;
  --color-accent-hover: #FF8233;
  --color-secondary: #A0AAB5;
  --color-bg-light: #F5F7FA;
  --color-bg-dark: #0D1117;
  --color-cyan: #00D4FF;
  --color-gold: #FFD700;
  --color-rose: #FF3B5C;
  --color-white: #FFFFFF;
  --color-border: rgba(160, 170, 181, 0.28);

  --font-heading: 'Orbitron', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-mono: 'Roboto Mono', 'JetBrains Mono', monospace;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-xxl: 64px;

  --container-width: 1200px;

  --transition-fast: 0.2s;
  --transition-base: 0.3s;
  --transition-slow: 0.4s;

  --shadow-card: 0 4px 20px rgba(10, 30, 60, 0.08);
  --shadow-card-hover: 0 8px 32px rgba(10, 30, 60, 0.16);
  --shadow-header: 0 4px 24px rgba(4, 12, 24, 0.35);
}

/* ---------- Base Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
}

h1 { font-size: 36px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }

p {
  margin-bottom: var(--space-md);
}

/* ---------- Container & Grid ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
  .grid--cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid--cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
  .grid--cols-2,
  .grid--cols-3,
  .grid--cols-4 { grid-template-columns: 1fr; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast), box-shadow var(--transition-base),
              transform var(--transition-base);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: 0 2px 10px rgba(255, 107, 0, 0.25);
}

.btn--accent:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 0, 0.35);
}

.btn--accent:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(255, 107, 0, 0.25);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(10, 30, 60, 0.35);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10, 30, 60, 0.08);
}

.btn--small {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 3px;
}

.btn--large {
  padding: 16px 32px;
  font-size: 16px;
}

.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn__arrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

.btn__label {
  white-space: nowrap;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: var(--space-md);
  z-index: 1003;
  padding: 10px 20px;
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transform: translateY(-110%);
  transition: transform var(--transition-base);
}

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

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 1004;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
  box-shadow: 0 0 12px rgba(255, 107, 0, 0.5);
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ---------- Focus Visible Global ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
[role="button"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    linear-gradient(rgba(160, 170, 181, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 170, 181, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, #0A1E3C, #0B214A);
  background-size: 24px 24px, 24px 24px, 100% 100%;
  box-shadow: var(--shadow-header);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 120px, var(--color-cyan) 300px, transparent 100%);
  z-index: 1;
}

.site-header__meta {
  background: rgba(5, 12, 25, 0.55);
  border-bottom: 1px solid rgba(160, 170, 181, 0.14);
}

.site-header__meta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 36px;
  padding-top: var(--space-xs);
  padding-bottom: var(--space-xs);
}

.site-header__tagline {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--color-cyan);
  margin: 0;
}

.site-header__tagline::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.site-header__tagline-sep {
  color: rgba(160, 170, 181, 0.4);
}

.site-header__contact {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-secondary);
  letter-spacing: 0.03em;
  margin: 0;
}

.site-header__divider {
  color: rgba(160, 170, 181, 0.35);
}

.site-header__main {
  background: rgba(10, 30, 60, 0.88);
  border-bottom: 1px solid rgba(160, 170, 181, 0.12);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  min-height: 76px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-accent);
  position: relative;
  flex-shrink: 0;
  background: rgba(255, 107, 0, 0.05);
}

.site-brand__mark::before,
.site-brand__mark::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  border-color: var(--color-accent);
  border-style: solid;
}

.site-brand__mark::before {
  top: -2px;
  left: -2px;
  border-width: 2px 0 0 2px;
  border-radius: 2px 0 0 0;
}

.site-brand__mark::after {
  bottom: -2px;
  right: -2px;
  border-width: 0 2px 2px 0;
  border-radius: 0 0 2px 0;
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 2px;
}

.site-brand__sub {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-secondary);
  letter-spacing: 2px;
}

/* ---------- Header Nav ---------- */
.site-nav {
  margin-inline: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 10px 15px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 15px;
  right: 15px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(255, 107, 0, 0.5);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.site-nav__link:hover {
  color: var(--color-accent);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-cyan);
  opacity: 0.75;
  line-height: 1;
}

.site-nav__foot {
  display: none;
}

/* ---------- Nav Toggle (Hamburger) ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  z-index: 1000;
  flex-shrink: 0;
  transition: border-color var(--transition-fast);
}

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

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--color-accent);
}

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

.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);
  background: var(--color-accent);
}

/* ---------- Header CTA ---------- */
.site-header__cta {
  flex-shrink: 0;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  background:
    linear-gradient(rgba(160, 170, 181, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 170, 181, 0.05) 1px, transparent 1px),
    var(--color-bg-dark);
  background-size: 28px 28px, 28px 28px, 100% 100%;
  color: rgba(255, 255, 255, 0.7);
  padding-top: var(--space-xxl);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 160px, var(--color-cyan) 480px, transparent 100%);
}

.site-footer::after {
  content: '';
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(160, 170, 181, 0.1);
  border-radius: 50%;
  box-shadow: 0 0 0 20px rgba(160, 170, 181, 0.03), 0 0 0 40px rgba(160, 170, 181, 0.02);
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: var(--space-xl) var(--space-lg);
  padding-bottom: var(--space-xl);
  position: relative;
  z-index: 1;
}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  margin-bottom: var(--space-md);
}

.site-footer__logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-accent);
  border-radius: 3px;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
  position: relative;
  background: rgba(255, 107, 0, 0.05);
  flex-shrink: 0;
}

.site-footer__logo-mark::before,
.site-footer__logo-mark::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  border-color: var(--color-accent);
  border-style: solid;
}

.site-footer__logo-mark::before {
  top: -2px;
  right: -2px;
  border-width: 2px 2px 0 0;
  border-radius: 0 2px 0 0;
}

.site-footer__logo-mark::after {
  bottom: -2px;
  left: -2px;
  border-width: 0 0 2px 2px;
  border-radius: 0 0 0 2px;
}

.site-footer__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.site-footer__logo-name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 2px;
}

.site-footer__logo-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-secondary);
  letter-spacing: 2px;
}

.site-footer__desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: var(--space-sm);
}

.site-footer__trust {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
  max-width: 300px;
}

.site-footer__heading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1.5px;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}

.site-footer__heading-line {
  display: inline-block;
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(255, 107, 0, 0.4);
}

.site-footer__list {
  margin: 0;
  padding: 0;
}

.site-footer__list li {
  margin-bottom: var(--space-sm);
}

.site-footer__list a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast), text-shadow var(--transition-fast);
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 5px;
  text-shadow: 0 0 12px rgba(255, 107, 0, 0.25);
}

.site-footer__contact-list {
  margin: 0;
  padding: 0;
  font-size: 14px;
  line-height: 1.8;
}

.site-footer__contact-list li {
  position: relative;
  margin-bottom: var(--space-sm);
  padding-left: 20px;
  color: rgba(255, 255, 255, 0.65);
}

.site-footer__contact-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 1px;
  background: var(--color-accent);
}

.site-footer__contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-cyan);
  opacity: 0.7;
  line-height: 1.4;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm) var(--space-md);
  border-top: 1px solid rgba(160, 170, 181, 0.12);
  padding: var(--space-md) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-secondary);
  position: relative;
  z-index: 1;
}

.site-footer__bottom p {
  margin: 0;
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.card--tilt {
  transform: rotate(-1.5deg);
}

.card--tilt:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(255, 107, 0, 0.25);
}

.card--glow {
  background: linear-gradient(145deg, #0A1E3C, #152E58);
  color: var(--color-white);
  border-color: rgba(0, 212, 255, 0.18);
  box-shadow: 0 8px 32px rgba(10, 30, 60, 0.28);
}

.card--glow:hover {
  box-shadow: 0 12px 40px rgba(10, 30, 60, 0.42), 0 0 24px rgba(0, 212, 255, 0.08);
  border-color: rgba(0, 212, 255, 0.4);
}

/* ---------- Section Label ---------- */
.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section-label__num {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: 1px;
}

.section-label__text {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-md);
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-secondary);
}

.breadcrumbs__link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumbs__link:hover {
  color: var(--color-accent);
}

.breadcrumbs__current {
  color: var(--color-accent);
  font-weight: 600;
}

.breadcrumbs__sep {
  color: var(--color-secondary);
  opacity: 0.5;
}

/* ---------- Image Shell ---------- */
.img-shell {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
}

.img-shell--ratio-16x9 { aspect-ratio: 16 / 9; }
.img-shell--ratio-4x3  { aspect-ratio: 4 / 3; }
.img-shell--ratio-1x1  { aspect-ratio: 1 / 1; }

.img-shell::after {
  content: 'IMG PLACEHOLDER';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--color-secondary);
  background: repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(160, 170, 181, 0.07) 8px, rgba(160, 170, 181, 0.07) 16px);
}

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

/* ---------- Data Table ---------- */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--color-bg-light);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.table th,
.table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.table th {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(160, 170, 181, 0.12);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table--striped tbody tr:nth-child(odd) {
  background: rgba(160, 170, 181, 0.08);
}

/* ---------- Tech Grid Utilities ---------- */
.tech-grid {
  background-image:
    linear-gradient(rgba(10, 30, 60, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 30, 60, 0.045) 1px, transparent 1px);
  background-size: 24px 24px;
}

.tech-grid--dark {
  background-image:
    linear-gradient(rgba(160, 170, 181, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 170, 181, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 1024px) {
  .site-header__tagline {
    font-size: 10px;
  }

  .site-header__contact {
    font-size: 10px;
  }

  .site-nav__link {
    padding: 10px 10px;
    font-size: 13px;
  }

  .site-nav__link::after {
    left: 10px;
    right: 10px;
  }

  .site-header__inner {
    gap: var(--space-md);
  }

  .site-footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 768px) {
  .site-header__meta {
    display: none;
  }

  .site-header__inner {
    min-height: 64px;
    gap: var(--space-md);
  }

  .site-brand__name {
    font-size: 16px;
  }

  .site-brand__mark {
    width: 36px;
    height: 36px;
    font-size: 11px;
  }

  .site-header__cta .btn__label {
    display: none;
  }

  .site-header__cta {
    width: 36px;
    height: 36px;
    padding: 0;
    margin-left: auto;
  }

  .site-header__cta .btn__arrow {
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  /* ---- Mobile Nav Drawer ---- */
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 85vw);
    background:
      linear-gradient(rgba(160, 170, 181, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(160, 170, 181, 0.05) 1px, transparent 1px),
      var(--color-primary);
    background-size: 24px 24px, 24px 24px, 100% 100%;
    border-left: 1px solid rgba(160, 170, 181, 0.15);
    padding: calc(var(--space-xxl) + 24px) var(--space-lg) var(--space-lg);
    transform: translateX(102%);
    transition: transform var(--transition-base);
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0;
    box-shadow: -12px 0 40px rgba(4, 12, 24, 0.5);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 18px;
    font-size: 16px;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link:hover {
    background: rgba(255, 107, 0, 0.08);
    border-left-color: var(--color-accent);
    color: var(--color-accent);
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(255, 107, 0, 0.1);
    border-left-color: var(--color-accent);
    color: var(--color-accent);
  }

  .site-nav__index {
    font-size: 12px;
    min-width: 20px;
  }

  .site-nav__foot {
    display: block;
    margin-top: var(--space-xl);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(160, 170, 181, 0.15);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--color-secondary);
    text-align: center;
    opacity: 0.7;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl) var(--space-lg);
  }

  .site-footer__bottom {
    justify-content: center;
    text-align: center;
  }

  .section-label__num {
    font-size: 28px;
  }
}

/* ---------- Responsive: Small Mobile ---------- */
@media (max-width: 480px) {
  .site-header__inner {
    gap: var(--space-sm);
  }

  .site-brand__text {
    display: none;
  }

  .site-brand__mark {
    width: 38px;
    height: 38px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding-inline: var(--space-md);
  }
}

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

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

  .card--tilt,
  .site-nav__link,
  .btn,
  .site-nav {
    transform: none !important;
    transition: none !important;
  }

  .scroll-progress {
    transition: none;
  }
}

/* ---------- Print ---------- */
@media print {
  .site-header,
  .site-footer,
  .scroll-progress,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #FFFFFF;
    color: #000000;
  }
}