/* ==========================================================
   site.css · 竞博入口 door-jbo.com.cn
   01 Variables · Reset · Base
   02 Accessibility
   03 Layout Helpers
   04 Header
   05 Footer
   06 Shared Components
   07 Responsive
   08 Reduced Motion
   ========================================================== */

/* ---------- 01 Variables & Base ---------- */
:root {
  --color-deep-blue: #0B1B3D;
  --color-gold: #C9A227;
  --color-gold-dark: #8A6D1A;
  --color-cyan: #00E5FF;
  --color-violet: #7A5AF8;
  --color-ink: #0B0B0F;
  --color-glass: rgba(255, 255, 255, 0.08);
  --color-mist: #A0AABF;
  --color-light: #E5E7EB;

  --color-bg: var(--color-deep-blue);
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-strong: rgba(255, 255, 255, 0.10);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-text: var(--color-light);
  --color-text-muted: var(--color-mist);

  --font-heading: "Montserrat", "Arial Black", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", "Consolas", "Liberation Mono", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --container-max: 1200px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-xl: 36px;

  --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.32);
  --shadow-2: 0 12px 40px rgba(0, 0, 0, 0.45);

  --transition-fast: 160ms ease;
  --transition-base: 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(1100px 700px at 85% -10%, rgba(122, 90, 248, 0.16), transparent 55%),
    radial-gradient(900px 600px at -10% 25%, rgba(0, 229, 255, 0.10), transparent 50%),
    radial-gradient(1200px 800px at 50% 115%, rgba(201, 162, 39, 0.08), transparent 60%);
  background-repeat: no-repeat;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-text);
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-cyan);
}

img,
svg {
  display: block;
  max-width: 100%;
}

ul,
ol {
  padding-left: 1.25em;
}

::selection {
  background: rgba(0, 229, 255, 0.28);
  color: #ffffff;
}

/* ---------- 02 Accessibility ---------- */
:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-cyan);
  color: var(--color-ink);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: var(--shadow-2);
  transform: translateY(-200%);
  transition: transform 200ms ease;
}

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

/* ---------- 03 Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

.section {
  position: relative;
  padding-block: clamp(56px, 9vw, 112px);
}

.section--compact {
  padding-block: clamp(32px, 5vw, 64px);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: clamp(28px, 5vw, 52px);
}

.section-head__text {
  display: grid;
  justify-items: start;
  gap: 8px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-cyan);
}

.section-kicker::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--color-gold);
}

.section-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(28px, 4.5vw, 52px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.section-note {
  margin: 0;
  flex: none;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-mist);
  white-space: nowrap;
  opacity: 0.75;
}

.mono {
  font-family: var(--font-mono);
}

#main-content {
  display: block;
  min-height: 60vh;
  scroll-margin-top: 24px;
}

/* ---------- 04 Header ---------- */
.site-header {
  position: relative;
  background: linear-gradient(180deg, rgba(11, 27, 61, 0.95), rgba(11, 27, 61, 0.88));
}

.site-header::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-gold) 25%, var(--color-cyan) 75%, transparent 100%);
}

.announce-bar {
  background: rgba(11, 11, 15, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.announce-bar__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 10px clamp(20px, 4vw, 48px);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-mist);
}

.announce-bar__pulse {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.8);
}

.announce-bar__text {
  margin: 0;
  flex: 1;
  letter-spacing: 0.04em;
}

.announce-bar__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  white-space: nowrap;
}

.masthead {
  position: relative;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 40px) clamp(20px, 4vw, 48px) clamp(16px, 2vw, 24px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.masthead::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(520px, 70%);
  height: 120px;
  transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(0, 229, 255, 0.09), transparent);
  pointer-events: none;
}

.masthead__deco {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-mist);
  white-space: nowrap;
}

.masthead__deco--left {
  justify-content: flex-start;
}

.masthead__deco--right {
  justify-content: flex-end;
}

.masthead__deco-num {
  font-size: 15px;
  color: var(--color-gold);
}

.masthead__deco-dash {
  width: 28px;
  height: 1px;
  flex: none;
  background: linear-gradient(90deg, rgba(201, 162, 39, 0.7), rgba(201, 162, 39, 0.1));
}

.masthead__deco--right .masthead__deco-dash {
  background: linear-gradient(270deg, rgba(0, 229, 255, 0.7), rgba(0, 229, 255, 0.1));
}

.site-brand {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--color-text);
  transition: opacity var(--transition-base);
}

.site-brand:hover {
  opacity: 0.9;
}

.site-brand__seal {
  width: 52px;
  height: 52px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  box-shadow: 0 8px 28px rgba(201, 162, 39, 0.35);
}

.site-brand__text {
  display: grid;
  gap: 5px;
  justify-items: start;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

.site-brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  white-space: nowrap;
}

.nav-strip {
  background: rgba(11, 11, 15, 0.6);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.main-nav {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

.main-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav__item {
  list-style: none;
}

.main-nav__link {
  display: block;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-mist);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.main-nav__link::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 8px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

.main-nav__link:hover,
.main-nav__link[aria-current="page"] {
  color: var(--color-text);
}

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

.main-nav__toggle {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.main-nav__toggle:hover {
  border-color: rgba(0, 229, 255, 0.4);
  background: var(--color-surface-strong);
}

.main-nav__toggle-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-mist);
}

.main-nav__toggle-bars {
  width: 20px;
  height: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.main-nav__toggle-bars > span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.main-nav[data-open] .main-nav__toggle-bars > span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.main-nav[data-open] .main-nav__toggle-bars > span:nth-child(2) {
  opacity: 0;
}

.main-nav[data-open] .main-nav__toggle-bars > span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 900;
  pointer-events: none;
}

.page-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-cyan), var(--color-violet));
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
  transition: width 80ms linear;
}

/* ---------- 05 Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 128px);
  background: linear-gradient(180deg, #0d1f47 0%, #060b18 100%);
  border-top: 1px solid var(--color-border);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, 100%);
  height: 100px;
  background: radial-gradient(closest-side, rgba(201, 162, 39, 0.12), rgba(0, 229, 255, 0.06), transparent 75%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 80px) clamp(20px, 4vw, 48px) 0;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.9fr 1fr 1fr 1.5fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
}

.footer-brand__seal {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 19px;
  line-height: 1;
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

.footer-brand__about {
  margin-top: 16px;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-mist);
}

.footer-brand__bilingual {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  opacity: 0.7;
}

.footer-col__title {
  margin: 4px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.footer-col--contact {
  position: relative;
  padding-left: 24px;
  border-left: 1px solid rgba(201, 162, 39, 0.25);
}

.footer-links {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  display: inline-block;
  color: var(--color-mist);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a::before {
  content: "→";
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-links a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-contact {
  display: grid;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-contact__item {
  display: grid;
  gap: 4px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-mist);
  text-transform: uppercase;
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: clamp(40px, 6vw, 72px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-mist);
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom__icp {
  padding: 3px 12px;
  border: 1px solid rgba(201, 162, 39, 0.3);
  border-radius: 999px;
  background: rgba(201, 162, 39, 0.06);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-mist);
}

.footer-bottom__trust {
  flex-basis: 100%;
  font-size: 12px;
  color: rgba(160, 170, 191, 0.7);
}

/* ---------- 06 Shared Components ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  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: linear-gradient(120deg, var(--color-gold) 0%, #a88420 100%);
  color: var(--color-ink);
  box-shadow: 0 6px 24px rgba(201, 162, 39, 0.28);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(201, 162, 39, 0.4);
}

.btn--ghost {
  border-color: rgba(0, 229, 255, 0.5);
  background: rgba(0, 229, 255, 0.08);
  color: var(--color-cyan);
}

.btn--ghost:hover {
  background: rgba(0, 229, 255, 0.16);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 2px;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  font-size: 13px;
  color: var(--color-mist);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  font-family: var(--font-mono);
  color: var(--color-gold);
}

.breadcrumb a {
  color: var(--color-mist);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.4);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.06));
}

.card__title {
  margin-bottom: 10px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.3;
}

.card__text {
  margin-bottom: 0;
  font-size: 14px;
  color: var(--color-mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-cyan);
}

.tag--gold {
  border-color: rgba(201, 162, 39, 0.35);
  background: rgba(201, 162, 39, 0.12);
  color: var(--color-gold);
}

.panel {
  position: relative;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.panel + .panel {
  margin-top: clamp(20px, 3vw, 36px);
}

.panel:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 229, 255, 0.35);
}

.panel--gold {
  border-color: rgba(201, 162, 39, 0.35);
}

.panel--cyan {
  border-color: rgba(0, 229, 255, 0.3);
}

.arc-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
}

.arc-divider::before {
  content: "";
  width: min(600px, 80%);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.4), var(--color-gold), transparent);
}

.image-holder {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(122, 90, 248, 0.08) 50%, rgba(201, 162, 39, 0.06)),
    #101d3d;
}

.image-holder::before {
  content: "";
  display: block;
}

.image-holder::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.image-holder--16-9::before {
  padding-top: 56.25%;
}

.image-holder--4-3::before {
  padding-top: 75%;
}

.image-holder--1-1::before {
  padding-top: 100%;
}

/* ---------- 07 Responsive ---------- */
@media (max-width: 1000px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col--contact {
    padding-left: 0;
    border-left: none;
  }
}

@media (max-width: 800px) {
  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: 10px;
  }

  .masthead__deco {
    display: none;
  }

  .site-brand {
    flex-direction: column;
    gap: 10px;
  }

  .site-brand__text {
    justify-items: center;
  }

  .nav-strip {
    padding: 12px clamp(16px, 4vw, 32px);
  }

  .main-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 0;
  }

  .main-nav__toggle {
    display: flex;
  }

  .main-nav__list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 6px;
    border-top: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
  }

  .main-nav[data-open] .main-nav__list {
    display: flex;
  }

  .main-nav__link {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    text-align: center;
  }

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

  .main-nav__link:hover {
    background: rgba(255, 255, 255, 0.06);
  }
}

@media (max-width: 600px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 560px) {
  .announce-bar__meta {
    display: none;
  }

  .grid--2 {
    grid-template-columns: 1fr;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .section-note {
    writing-mode: horizontal-tb;
    font-size: 10px;
  }

  .site-brand__name {
    font-size: 26px;
    letter-spacing: 0.08em;
  }

  .site-brand__seal {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }

  .site-brand__sub {
    font-size: 9px;
    letter-spacing: 0.12em;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 08 Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

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

  .page-progress__bar {
    transition: none;
  }

  .card:hover,
  .panel:hover,
  .btn--primary:hover,
  .btn--ghost:hover {
    transform: none;
  }

  .main-nav__link::after {
    transition: none;
  }
}