/* ==========================================================
   易倍赛事 Site Kit 共享样式 /assets/site.css
   ========================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --color-primary: #0B1F3A;
  --color-primary-dark: #071426;
  --color-link: #1E4D8C;
  --color-accent: #FF6B35;
  --color-neon: #39FF14;
  --color-cream: #F8F5F0;
  --color-ink: #1A1A1A;
  --color-gray: #E6E6E6;

  --font-headline: 'Arial Black', 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  --container-width: 1200px;
  --container-pad: 1rem;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --ease-fast: 160ms ease;
  --ease-base: 260ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (min-width: 768px) {
  :root {
    --container-pad: 1.5rem;
  }
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-cream);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul[class], ol[class] {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

button {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  cursor: pointer;
}

/* ---------- 3. 基础排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.15;
  color: var(--color-cream);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.625rem, 3vw, 2.25rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

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

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

#main-content {
  scroll-margin-top: 64px;
}

@media (min-width: 768px) {
  html { scroll-padding-top: 128px; }
  #main-content { scroll-margin-top: 128px; }
}

/* ---------- 5. 可访问性工具 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--container-pad);
  z-index: 1000;
  padding: 0.75rem 1.5rem;
  background: var(--color-neon);
  color: var(--color-primary-dark);
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(7, 20, 38, 0.5);
  transition: top var(--ease-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* ---------- 6. 顶部信息带 ---------- */
.site-topbar {
  background: var(--color-primary-dark);
  border-bottom: 1px solid rgba(57, 255, 20, 0.18);
}

.site-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 36px;
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
  font-size: 0.8125rem;
  line-height: 1.4;
}

.site-topbar__notice {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(248, 245, 240, 0.78);
}

.site-topbar__notice::before {
  content: '';
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-neon);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.6);
}

.site-topbar__tagline {
  color: rgba(248, 245, 240, 0.55);
  letter-spacing: 0.04em;
}

/* ---------- 7. 共享页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-primary);
  border-bottom: 1px solid rgba(57, 255, 20, 0.22);
}

.site-header__row--brand {
  border-bottom: 1px solid rgba(248, 245, 240, 0.08);
}

.site-header__brand-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-cream);
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #ff9f5a 55%, var(--color-neon) 130%);
  color: var(--color-primary-dark);
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1;
  text-align: center;
  transform: skew(-8deg);
  box-shadow: 0 6px 18px rgba(255, 107, 53, 0.28);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand__name {
  font-family: var(--font-headline);
  font-size: 1.625rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--color-cream);
}

.brand__tagline {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: rgba(248, 245, 240, 0.55);
  text-transform: uppercase;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-headline);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: rgba(248, 245, 240, 0.5);
  border: 1px solid rgba(248, 245, 240, 0.14);
  border-radius: var(--radius-pill);
  padding: 0.375rem 0.875rem;
  white-space: nowrap;
}

.site-header__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-neon);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.7);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 48px;
  height: 48px;
  padding: 10px;
  border: 1px solid rgba(248, 245, 240, 0.18);
  border-radius: var(--radius-md);
  background: rgba(30, 77, 140, 0.22);
  transition: border-color var(--ease-fast), background-color var(--ease-fast);
}

.nav-toggle:hover {
  border-color: var(--color-neon);
  background: rgba(57, 255, 20, 0.1);
}

.nav-toggle__icon {
  position: relative;
  width: 20px;
  height: 14px;
}

.nav-toggle__icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-cream);
  transition: transform var(--ease-base), top var(--ease-base), opacity var(--ease-fast);
}

.nav-toggle__icon span:nth-child(1) { top: 0; }
.nav-toggle__icon span:nth-child(2) { top: 6px; }
.nav-toggle__icon span:nth-child(3) { top: 12px; }

.nav-toggle__label {
  font-size: 0.6875rem;
  color: rgba(248, 245, 240, 0.7);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

/* 导航第二层 */
.site-header__row--nav {
  background: var(--color-primary-dark);
}

.site-header__row--nav .container {
  display: flex;
  align-items: center;
  min-height: 54px;
}

.site-nav {
  width: 100%;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(248, 245, 240, 0.82);
  transition: color var(--ease-fast), background-color var(--ease-fast);
}

.site-nav__link::before {
  content: '';
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0;
  transform: scale(0.4);
  transition: opacity var(--ease-fast), transform var(--ease-fast);
}

.site-nav__link:hover {
  color: var(--color-cream);
  background: rgba(57, 255, 20, 0.08);
}

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

.site-nav__link[aria-current="page"] {
  color: var(--color-cream);
  font-weight: 700;
}

.site-nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-neon);
}

.site-nav__link--cta {
  margin-left: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-weight: 700;
}

.site-nav__link--cta:hover {
  background: #ff8555;
  color: var(--color-primary-dark);
}

.site-nav__link--cta::before,
.site-nav__link--cta::after {
  display: none;
}

/* ---------- 8. 共享页脚 ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(248, 245, 240, 0.72);
  font-size: 0.875rem;
  border-top: 3px solid var(--color-accent);
}

.site-footer::before {
  content: '';
  display: block;
  height: 6px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 30%, var(--color-neon) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 80px) 100%, 80px 100%);
}

.site-footer__inner {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-lg);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.site-footer__brand-name {
  font-family: var(--font-headline);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-cream);
  margin-bottom: 0.25rem;
  letter-spacing: 0.03em;
}

.site-footer__brand-tagline {
  color: rgba(248, 245, 240, 0.55);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.site-footer__statement {
  max-width: 40ch;
  color: rgba(248, 245, 240, 0.58);
  line-height: 1.7;
}

.site-footer__title {
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-neon);
  margin-bottom: var(--space-md);
}

.site-footer__nav-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem 1.5rem;
}

.site-footer a {
  color: rgba(248, 245, 240, 0.72);
  transition: color var(--ease-fast);
}

.site-footer a:hover {
  color: var(--color-neon);
}

.site-footer__col--contact p {
  margin: 0.25rem 0;
  line-height: 1.6;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(248, 245, 240, 0.1);
  color: rgba(248, 245, 240, 0.5);
  font-size: 0.8125rem;
}

.site-footer__legal {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-footer__legal span {
  opacity: 0.4;
}

.site-footer__icp {
  letter-spacing: 0.04em;
}

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
  border: 2px solid transparent;
  transition: transform var(--ease-fast), background-color var(--ease-fast), border-color var(--ease-fast), color var(--ease-fast);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: #ff8555;
  border-color: #ff8555;
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-cream);
  border-color: rgba(248, 245, 240, 0.35);
}

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

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  padding: 0.875rem 0;
  font-size: 0.8125rem;
  color: rgba(248, 245, 240, 0.55);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin-right: 0.375rem;
  color: rgba(248, 245, 240, 0.3);
}

.breadcrumb a {
  color: rgba(248, 245, 240, 0.75);
  transition: color var(--ease-fast);
}

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

.breadcrumb__item[aria-current="page"] {
  color: var(--color-cream);
  font-weight: 600;
}

/* ---------- 11. 章节标题组 ---------- */
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-neon);
  margin-bottom: var(--space-sm);
}

.section-kicker::before {
  content: '';
  flex: none;
  width: 22px;
  height: 3px;
  border-radius: 3px;
  background: var(--color-accent);
  transform: skew(-20deg);
}

.section-title {
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1.12;
  color: var(--color-cream);
  margin-bottom: var(--space-md);
}

.section-desc {
  max-width: 60ch;
  color: rgba(248, 245, 240, 0.72);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

/* ---------- 12. 卡片 ---------- */
.card {
  background: rgba(30, 77, 140, 0.16);
  border: 1px solid rgba(248, 245, 240, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--ease-base), border-color var(--ease-base), background-color var(--ease-base);
}

.card:hover {
  border-color: rgba(57, 255, 20, 0.4);
  background: rgba(30, 77, 140, 0.26);
  transform: translateY(-4px);
}

.card--cream {
  background: var(--color-cream);
  color: var(--color-ink);
  border-color: transparent;
}

.card--cream:hover {
  background: #fffdf8;
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.card__title {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  font-weight: 700;
  color: inherit;
  margin-bottom: 0.5rem;
}

.card__text {
  font-size: 0.9375rem;
  line-height: 1.6;
  opacity: 0.82;
}

.card--cream .card__text {
  color: var(--color-ink);
  opacity: 0.78;
}

/* ---------- 13. Bento 网格 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.bento-grid__item--span-3 { grid-column: span 3; }
.bento-grid__item--span-4 { grid-column: span 4; }
.bento-grid__item--span-5 { grid-column: span 5; }
.bento-grid__item--span-6 { grid-column: span 6; }
.bento-grid__item--span-7 { grid-column: span 7; }
.bento-grid__item--span-8 { grid-column: span 8; }
.bento-grid__item--span-12 { grid-column: span 12; }

@media (max-width: 1024px) {
  .bento-grid__item--span-5,
  .bento-grid__item--span-6,
  .bento-grid__item--span-7,
  .bento-grid__item--span-8 {
    grid-column: span 12;
  }
  .bento-grid__item--span-3,
  .bento-grid__item--span-4 {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .bento-grid__item--span-3,
  .bento-grid__item--span-4 {
    grid-column: span 12;
  }
  .bento-grid {
    gap: var(--space-sm);
  }
}

/* ---------- 14. 图片占位容器 ---------- */
.figure {
  position: relative;
  display: flex;
  align-items: flex-end;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(30, 77, 140, 0.55) 0%, rgba(7, 20, 38, 0.9) 100%);
}

.figure--portrait {
  aspect-ratio: 4 / 5;
}

.figure--panorama {
  aspect-ratio: 21 / 9;
}

.figure::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 45%, rgba(7, 20, 38, 0.75) 100%),
    repeating-linear-gradient(-45deg, rgba(255, 107, 53, 0.08) 0 8px, transparent 8px 16px);
}

.figure__caption {
  position: relative;
  z-index: 1;
  padding: var(--space-md);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(248, 245, 240, 0.75);
}

/* ---------- 15. 首屏主题声明 ---------- */
.page-enter {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(1.5rem, 3vw, 2.5rem);
  border-bottom: 1px solid rgba(57, 255, 20, 0.14);
  background:
    radial-gradient(1100px 380px at 88% -10%, rgba(255, 107, 53, 0.2) 0%, transparent 60%),
    linear-gradient(180deg, rgba(30, 77, 140, 0.28) 0%, transparent 100%),
    var(--color-primary);
}

.page-enter__index {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-neon);
  padding: 0.375rem 1rem;
  border: 1px solid rgba(57, 255, 20, 0.35);
  border-radius: var(--radius-pill);
  background: rgba(57, 255, 20, 0.06);
  margin-bottom: var(--space-lg);
}

.page-enter__title {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--color-cream);
  max-width: 11em;
}

.page-enter__title .text-accent {
  color: var(--color-accent);
}

.page-enter__statement {
  margin-top: var(--space-md);
  max-width: 46ch;
  color: rgba(248, 245, 240, 0.72);
  font-size: 1.125rem;
  line-height: 1.7;
}

.page-enter__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  margin-top: var(--space-xl);
  font-size: 0.875rem;
  color: rgba(248, 245, 240, 0.55);
}

/* ---------- 16. 标签页 ---------- */
.tab-group {
  margin-bottom: var(--space-lg);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  border-bottom: 1px solid rgba(248, 245, 240, 0.12);
  margin-bottom: var(--space-md);
}

.tab-trigger {
  appearance: none;
  border: 1px solid transparent;
  border-bottom: none;
  background: transparent;
  color: rgba(248, 245, 240, 0.68);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-pill) var(--radius-pill) var(--radius-sm) var(--radius-sm);
  transition: color var(--ease-fast), background-color var(--ease-fast), border-color var(--ease-fast);
}

.tab-trigger:hover {
  color: var(--color-cream);
  background: rgba(255, 107, 53, 0.08);
}

.tab-trigger.is-active {
  color: var(--color-cream);
  background: rgba(255, 107, 53, 0.14);
  border-color: rgba(255, 107, 53, 0.35);
  border-bottom-color: var(--color-neon);
  font-weight: 700;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

/* ---------- 17. 滚动显现与进度 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 520ms ease, transform 520ms ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 200;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-neon) 100%);
  pointer-events: none;
}

/* ---------- 18. 文本工具 ---------- */
.text-accent {
  color: var(--color-accent);
}

.text-neon {
  color: var(--color-neon);
}

/* ---------- 19. 移动端适配 ---------- */
@media (max-width: 768px) {
  .site-topbar__tagline {
    display: none;
  }

  .site-topbar__inner {
    justify-content: center;
    text-align: center;
    min-height: 32px;
  }

  .site-header__row--brand {
    border-bottom: none;
  }

  .site-header__brand-inner {
    min-height: 64px;
  }

  .brand__mark {
    width: 40px;
    height: 40px;
    font-size: 1.0625rem;
    border-radius: 12px;
  }

  .brand__name {
    font-size: 1.375rem;
  }

  .site-header__status {
    display: none;
  }

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

  .site-header__row--nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    background: var(--color-primary-dark);
    border-top: 1px solid rgba(57, 255, 20, 0.18);
    border-bottom: 1px solid rgba(57, 255, 20, 0.18);
    box-shadow: 0 18px 36px rgba(7, 20, 38, 0.45);
    transition: opacity var(--ease-base), transform var(--ease-base), visibility var(--ease-base);
  }

  .site-header__row--nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-header__row--nav .container {
    min-height: 0;
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 0.75rem;
  }

  .site-nav__item {
    border-bottom: 1px solid rgba(248, 245, 240, 0.06);
  }

  .site-nav__item:last-child {
    border-bottom: none;
    padding: 0.75rem 1.25rem 1rem;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .site-nav__link[aria-current="page"]::after {
    left: auto;
    right: 1.25rem;
    width: 8px;
    height: 8px;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    border-radius: 50%;
  }

  .site-nav__link--cta {
    justify-content: center;
    margin: 0;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-pill);
    font-weight: 700;
  }

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

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .page-enter__meta {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

/* ---------- 20. 焦点与弱动效 ---------- */
:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 3px;
}

.brand:focus-visible,
.nav-toggle:focus-visible,
.site-nav__link:focus-visible,
.btn:focus-visible,
.tab-trigger:focus-visible,
.site-footer a:focus-visible,
.breadcrumb a:focus-visible {
  outline-color: var(--color-neon);
  outline-offset: 2px;
}

@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;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }

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