/* ===== Site Kit / 天天竞界 / 共享样式 ===== */

:root {
  --c-bg: #0A0F24;
  --c-panel: #111A3A;
  --c-purple: #8B5CF6;
  --c-violet: #7C3AED;
  --c-green: #22FF88;
  --c-lime: #B4FF00;
  --c-text: #F2F6FC;
  --c-gray: #A0A6C0;
  --c-amber: #FFB020;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "Bahnschrift", "DIN Alternate", "Noto Sans Mono", "SFMono-Regular", Consolas, monospace, sans-serif;
  --container-w: 1440px;
  --ease-std: cubic-bezier(.4, 0, .2, 1);
  --dur-std: .18s;
}

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

[hidden] {
  display: none !important;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(139, 92, 246, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, .05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul, ol {
  list-style: none;
}

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

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

:focus-visible {
  outline: 2px solid var(--c-green);
  outline-offset: 2px;
}

#main-content {
  outline: none;
  scroll-margin-top: 24px;
}

#main-content:focus-visible {
  outline: 2px solid var(--c-green);
  outline-offset: 4px;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
}

.visually-hidden {
  position: absolute;
  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: 8px;
  left: 8px;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--c-green);
  color: var(--c-bg);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .06em;
  transform: translateY(-200%);
  transition: transform var(--dur-std) var(--ease-std);
}

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

/* ===== Header ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    linear-gradient(180deg, rgba(139, 92, 246, .08) 0%, transparent 180px),
    var(--c-bg);
  border-bottom: 1px solid rgba(139, 92, 246, .35);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .22);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent 0 7px, rgba(139, 92, 246, .035) 7px 8px);
  pointer-events: none;
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-purple) 0%, var(--c-green) 46%, transparent 86%);
  opacity: .9;
  pointer-events: none;
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
  position: relative;
  z-index: 1;
}

.header-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0 14px;
  position: relative;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 20px;
  min-width: 0;
}

.brand-main {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-purple) 0%, var(--c-green) 100%);
  color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -.02em;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  flex-shrink: 0;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.3;
}

.brand-text {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--c-text);
  white-space: nowrap;
}

.brand-subtext {
  display: inline-flex;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .14em;
  color: var(--c-bg);
  background: var(--c-lime);
  padding: 2px 10px 2px 8px;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  line-height: 1.6;
}

.header-tagline {
  flex: 0 1 210px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .16em;
  color: var(--c-gray);
  border-left: 2px solid var(--c-purple);
  padding-left: 12px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  position: relative;
  z-index: 2;
}

.header-cta {
  position: relative;
  z-index: 2;
}

.header-code {
  position: absolute;
  top: 50%;
  right: 230px;
  transform: translateY(-50%);
  z-index: 0;
  font-family: var(--font-mono);
  font-size: 76px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: .08em;
  color: rgba(139, 92, 246, .18);
  -webkit-text-stroke: 1px rgba(139, 92, 246, .38);
  pointer-events: none;
  user-select: none;
}

/* ===== Nav ===== */

.site-nav {
  display: block;
  position: relative;
  border-top: 1px solid rgba(139, 92, 246, .3);
  background: rgba(17, 26, 58, .55);
}

.nav-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 24px;
}

.nav-list {
  display: flex;
  align-items: stretch;
}

.nav-list li {
  display: flex;
  align-items: stretch;
}

.nav-list a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--c-gray);
  border-left: 1px solid rgba(160, 166, 192, .16);
  transition: color var(--dur-std) var(--ease-std), background var(--dur-std) var(--ease-std);
}

.nav-list li:last-child a {
  border-right: 1px solid rgba(160, 166, 192, .16);
}

.nav-list a:hover {
  color: var(--c-green);
  background: rgba(34, 255, 136, .05);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-purple);
}

.nav-list a[aria-current="page"] {
  color: var(--c-green);
  background: linear-gradient(180deg, rgba(34, 255, 136, .12) 0%, rgba(34, 255, 136, .02) 100%);
}

.nav-list a[aria-current="page"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--c-green);
  box-shadow: 0 0 8px rgba(34, 255, 136, .55);
}

.nav-list a[aria-current="page"] .nav-num {
  color: var(--c-green);
}

.nav-coordinate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(160, 166, 192, .8);
  border-left: 1px solid rgba(160, 166, 192, .16);
  padding: 0 2px 0 18px;
  white-space: nowrap;
}

.nav-coordinate::before {
  content: '◆';
  color: var(--c-purple);
  font-size: 8px;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(139, 92, 246, .5);
  background: rgba(139, 92, 246, .06);
  flex-shrink: 0;
}

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

.nav-toggle-line {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  transition: top var(--dur-std) var(--ease-std), transform var(--dur-std) var(--ease-std), opacity var(--dur-std) var(--ease-std);
  pointer-events: none;
}

.nav-toggle-line:nth-child(1) { top: 14px; }
.nav-toggle-line:nth-child(2) { top: 22px; }
.nav-toggle-line:nth-child(3) { top: 30px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  top: 22px;
  transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  top: 22px;
  transform: rotate(-45deg);
}

/* ===== Footer ===== */

.site-footer {
  position: relative;
  background: linear-gradient(180deg, #0C1330 0%, #080D1E 100%);
  border-top: 1px solid rgba(139, 92, 246, .4);
  color: var(--c-gray);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 46%;
  background: linear-gradient(90deg, var(--c-green) 0%, var(--c-purple) 70%, transparent 100%);
  pointer-events: none;
}

.site-footer::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 62%, rgba(139, 92, 246, .07) 66%, transparent 70%),
    repeating-linear-gradient(90deg, rgba(160, 166, 192, .025) 0 1px, transparent 1px 32px);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 48px 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
  gap: 48px 56px;
}

.footer-brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .18em;
  color: var(--c-lime);
  background: rgba(180, 255, 0, .08);
  border: 1px solid rgba(180, 255, 0, .35);
  padding: 4px 12px;
  margin-bottom: 18px;
}

.footer-brand-mark::before {
  content: '◈';
  color: var(--c-green);
  font-size: 10px;
}

.footer-title {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1.2;
  color: var(--c-text);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--c-purple);
  margin-bottom: 18px;
}

.footer-about {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-gray);
  max-width: 44ch;
}

.footer-contact {
  align-self: start;
  background: rgba(139, 92, 246, .06);
  border: 1px solid rgba(139, 92, 246, .2);
  padding: 20px;
}

.footer-meta {
  min-width: 0;
  align-self: start;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .18em;
  color: var(--c-text);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(139, 92, 246, .35);
  margin-bottom: 16px;
}

.footer-heading::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--c-purple);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.contact-list {
  display: grid;
  gap: 10px;
}

.contact-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.contact-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-lime);
}

.contact-value {
  font-size: 14px;
  color: var(--c-text);
  word-break: break-all;
  line-height: 1.6;
}

.contact-note {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.75;
  color: rgba(160, 166, 192, .82);
  border-left: 2px solid var(--c-purple);
  padding-left: 10px;
}

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

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-gray);
  padding: 5px 0;
  transition: color var(--dur-std) var(--ease-std), transform var(--dur-std) var(--ease-std);
}

.footer-links a::before {
  content: '→';
  color: var(--c-purple);
  font-size: 12px;
}

.footer-links a:hover {
  color: var(--c-green);
  transform: translateX(2px);
}

.footer-bottom {
  border-top: 1px solid rgba(160, 166, 192, .18);
  margin-top: 48px;
  padding-top: 20px;
  padding-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-trust {
  max-width: 920px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-gray);
  border-left: 3px solid var(--c-amber);
  padding-left: 12px;
}

.footer-meta-line {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 13px;
  color: var(--c-gray);
}

.footer-copy {
  letter-spacing: .05em;
}

.footer-icp {
  letter-spacing: .04em;
}

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-std) var(--ease-std), color var(--dur-std) var(--ease-std), border-color var(--dur-std) var(--ease-std), transform var(--dur-std) var(--ease-std);
}

.btn-primary {
  background: var(--c-green);
  color: var(--c-bg);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.btn-primary:hover {
  background: var(--c-lime);
  transform: translateX(2px);
}

.btn-primary:focus-visible {
  background: var(--c-lime);
  outline: 2px solid var(--c-green);
  outline-offset: 2px;
}

.btn-outline {
  background: transparent;
  color: var(--c-green);
  border: 1px solid var(--c-green);
}

.btn-outline:hover {
  background: rgba(34, 255, 136, .08);
  border-color: var(--c-lime);
  color: var(--c-lime);
}

/* ===== Typography / Sections ===== */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--c-purple);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-label::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--c-green);
  transform: skewX(-30deg);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: .02em;
  color: var(--c-text);
  margin-bottom: 20px;
}

.content-section {
  padding: 64px 0;
}

.vertical-text {
  writing-mode: vertical-rl;
  font-size: 13px;
  letter-spacing: .3em;
  line-height: 1.4;
  color: var(--c-gray);
}

/* ===== Breadcrumb ===== */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-gray);
  padding: 18px 0;
}

.breadcrumb a {
  color: var(--c-purple);
  transition: color var(--dur-std) var(--ease-std);
}

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

.breadcrumb-sep {
  color: rgba(160, 166, 192, .55);
}

/* ===== Layout ===== */

.content-split {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.aside-note {
  position: sticky;
  top: 24px;
  border-left: 2px solid var(--c-purple);
  padding: 2px 0 2px 16px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-gray);
}

.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;
  background: linear-gradient(180deg, rgba(17, 26, 58, .92), rgba(10, 15, 36, .92));
  border: 1px solid rgba(139, 92, 246, .28);
  padding: 24px;
  overflow: hidden;
  transition: border-color var(--dur-std) var(--ease-std), transform var(--dur-std) var(--ease-std);
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-purple), transparent 60%);
  opacity: .6;
  transition: opacity var(--dur-std) var(--ease-std);
}

.card:hover {
  border-color: rgba(34, 255, 136, .5);
  transform: translateY(-3px);
}

.card:hover::after {
  opacity: 1;
}

.card-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--c-text);
  margin-bottom: 10px;
}

.card-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-gray);
}

/* ===== Tags ===== */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 4px 10px;
  color: var(--c-gray);
  border: 1px solid rgba(160, 166, 192, .3);
  background: rgba(160, 166, 192, .04);
}

.tag-acid {
  color: var(--c-lime);
  border-color: rgba(180, 255, 0, .4);
  background: rgba(180, 255, 0, .06);
}

.tag-purple {
  color: var(--c-purple);
  border-color: rgba(139, 92, 246, .4);
  background: rgba(139, 92, 246, .08);
}

.tag-green {
  color: var(--c-green);
  border-color: rgba(34, 255, 136, .4);
  background: rgba(34, 255, 136, .06);
}

/* ===== Filter ===== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.filter-btn {
  position: relative;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 8px 16px;
  color: var(--c-gray);
  background: var(--c-panel);
  border: 1px solid rgba(160, 166, 192, .3);
  transition: color var(--dur-std) var(--ease-std), border-color var(--dur-std) var(--ease-std), box-shadow var(--dur-std) var(--ease-std);
}

.filter-btn:hover {
  color: var(--c-text);
  border-color: var(--c-purple);
}

.filter-btn[aria-pressed="true"] {
  color: var(--c-green);
  border-color: var(--c-green);
  box-shadow: inset 0 -2px 0 var(--c-green);
}

/* ===== Legend / Coordinate / Image ===== */

.legend {
  border-left: 2px solid var(--c-purple);
  padding: 2px 0 2px 16px;
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--c-gray);
}

.legend-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  background: var(--c-purple);
  flex-shrink: 0;
}

.legend-dot-green {
  background: var(--c-green);
}

.legend-dot-lime {
  background: var(--c-lime);
}

.coord-index {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-gray);
}

.coord-index::before {
  content: '◆';
  color: var(--c-purple);
  font-size: 8px;
}

.image-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-panel) 0%, var(--c-bg) 100%);
  border: 1px solid rgba(139, 92, 246, .35);
  aspect-ratio: 16 / 9;
}

.image-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 45%, rgba(34, 255, 136, .08) 50%, transparent 55%),
    radial-gradient(circle at 70% 24%, rgba(139, 92, 246, .2), transparent 36%);
  pointer-events: none;
}

/* ===== Responsive ===== */

@media (max-width: 1199px) {
  .container,
  .header-inner,
  .nav-inner,
  .footer-inner {
    padding-left: 32px;
    padding-right: 32px;
  }

  .header-code {
    display: none;
  }

  .nav-coordinate {
    display: none;
  }

  .nav-list a {
    padding-left: 14px;
    padding-right: 14px;
    font-size: 14px;
  }

  .brand-text {
    font-size: 20px;
  }

  .footer-grid {
    gap: 32px;
  }
}

@media (max-width: 991px) {
  .header-tagline {
    display: none;
  }

  .brand-subtext {
    display: none;
  }

  .header-topline {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 14px;
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  }

  .brand-text {
    font-size: 18px;
  }

  .header-cta {
    padding: 10px 16px;
    font-size: 13px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    background: rgba(8, 13, 30, .96);
    border-top: 1px solid rgba(139, 92, 246, .4);
    box-shadow: 0 12px 24px rgba(0, 0, 0, .3);
  }

  .site-nav[data-open] {
    display: block;
    animation: navFade .18s var(--ease-std) both;
  }

  @keyframes navFade {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-inner {
    flex-direction: column;
    align-items: stretch;
    padding-top: 8px;
    padding-bottom: 16px;
    gap: 0;
  }

  .nav-list {
    flex-direction: column;
  }

  .nav-list a {
    border-left: none;
    border-right: none !important;
    border-bottom: 1px solid rgba(160, 166, 192, .14);
    padding: 14px 8px;
    font-size: 15px;
    border-radius: 0;
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  .nav-list a[aria-current="page"] {
    background: rgba(34, 255, 136, .06);
  }

  .nav-list a[aria-current="page"]::before {
    left: 0;
    width: 3px;
    height: 100%;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-inner {
    padding-top: 48px;
  }

  .content-split {
    grid-template-columns: 1fr;
  }

  .aside-note {
    position: static;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .container,
  .header-inner,
  .nav-inner,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-text {
    font-size: 16px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }

  .header-cta {
    padding: 8px 12px;
    font-size: 12px;
  }

  .header-actions {
    gap: 6px;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }

  .nav-toggle-line {
    left: 9px;
    width: 20px;
  }

  .nav-toggle-line:nth-child(1) { top: 11px; }
  .nav-toggle-line:nth-child(2) { top: 19px; }
  .nav-toggle-line:nth-child(3) { top: 27px; }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { top: 19px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { top: 19px; }

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

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    margin-top: 32px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .content-section {
    padding: 40px 0;
  }

  .skip-link {
    font-size: 13px;
    padding: 8px 12px;
  }
}

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

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}