/* =========================================================
   YOBO体育 Site Kit · /assets/site.css
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
dl,
dd,
figure,
blockquote,
pre,
hr {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

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

a {
  color: inherit;
}

/* ---------- 2. 设计令牌 ---------- */
:root {
  --color-primary: #FF4E00;
  --color-primary-light: #FF6B1A;
  --color-primary-grad: linear-gradient(135deg, #FF4E00 0%, #FFB300 100%);
  --color-yellow: #FFD600;
  --color-deep-blue: #0A1F44;
  --color-teal: #0A3D62;
  --color-wine: #5C1D2E;
  --color-purple: #4A2C6D;
  --color-light-bg: #F5F7FA;
  --color-text: #1A1A2E;
  --color-text-muted: #5A5A7A;
  --color-border: #E8EAF0;
  --color-cyan: #00B8D9;
  --color-white: #FFFFFF;

  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-headline: "Oswald", "Impact", "Arial Black", "Noto Sans SC", "PingFang SC", sans-serif;

  --container-width: 1200px;
  --container-pad: 1.25rem;

  --shadow-card: 0 0.25rem 1.5rem rgba(10, 31, 68, 0.06);
  --shadow-float: 0 0.75rem 2.5rem rgba(10, 31, 68, 0.14);

  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-pill: 999px;
}

/* ---------- 3. 布局容器与分区 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: 3rem;
}

.section--light {
  background: var(--color-light-bg);
}

.section--white {
  background: var(--color-white);
}

.section--dark {
  background: var(--color-deep-blue);
  color: #fff;
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: #fff;
}

/* ---------- 4. 网格 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* ---------- 5. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-light-bg);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-body);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

p {
  line-height: 1.75;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-light);
}

strong {
  font-weight: 700;
}

/* ---------- 6. 焦点可见性 ---------- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 7. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 1rem;
  z-index: 1200;
  display: inline-block;
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-float);
  transform: translateY(-110%);
  transition: transform 0.2s ease;
}

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

/* ---------- 8. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-deep-blue);
  color: var(--color-white);
  box-shadow: 0 0.125rem 1rem rgba(10, 31, 68, 0.3);
}

/* 工具条 */
.header-utility {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.04) 60%, rgba(255, 78, 0, 0.08) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-utility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 2.125rem;
}

.header-utility-note {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-utility-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.header-utility-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.125rem;
  padding: 0.25rem 0.75rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.4;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.header-utility-btn:hover {
  border-color: rgba(255, 78, 0, 0.7);
  color: #fff;
}

.header-utility-btn[aria-pressed="true"] {
  background: rgba(255, 78, 0, 0.18);
  border-color: var(--color-primary);
  color: var(--color-yellow);
}

.header-utility-btn .lang-cn,
.header-utility-btn .lang-en {
  transition: color 0.2s ease;
}

.header-utility-btn .lang-cn {
  order: 1;
}

.header-utility-btn .lang-slash {
  order: 2;
  margin-inline: 0.125rem;
  opacity: 0.6;
}

.header-utility-btn .lang-en {
  order: 3;
  font-family: var(--font-headline);
  font-size: 0.8125rem;
}

.header-utility-btn .lang-label {
  order: 4;
  margin-left: 0.125rem;
  font-size: 0.6875rem;
  opacity: 0.7;
}

.header-utility-btn.is-switched .lang-cn {
  order: 3;
  color: rgba(255, 255, 255, 0.5);
}

.header-utility-btn.is-switched .lang-en {
  order: 1;
  color: #FFB300;
}

.fav-icon {
  display: inline-block;
  font-size: 0.875rem;
  line-height: 1;
  color: var(--color-yellow);
  transition: transform 0.2s ease;
}

.header-utility-btn[aria-pressed="true"] .fav-icon {
  transform: scale(1.15);
}

/* 主头区 */
.header-main {
  position: relative;
}

.header-main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
}

/* 品牌标识 */
.brand-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  margin-right: auto;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-text {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand-logo-text em {
  font-style: normal;
  background: var(--color-primary-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.brand-logo-sub {
  margin-top: 0.125rem;
  font-size: 0.625rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1;
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-pill);
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.nav-index {
  font-family: var(--font-headline);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.35);
  transition: color 0.2s ease;
}

.nav-link:hover {
  background: rgba(255, 78, 0, 0.16);
  color: #fff;
}

.nav-link:hover .nav-index {
  color: var(--color-yellow);
}

.nav-link[aria-current="page"] {
  background: var(--color-primary-grad);
  color: #fff;
  box-shadow: 0 0.25rem 1rem rgba(255, 78, 0, 0.35);
}

.nav-link[aria-current="page"] .nav-index {
  color: rgba(255, 255, 255, 0.8);
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  color: #fff;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(255, 78, 0, 0.18);
  border-color: var(--color-primary);
}

.nav-toggle-box {
  display: block;
}

.nav-toggle-bar {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 0.25rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(0.3125rem) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-0.3125rem) rotate(-45deg);
}

.nav-toggle-label {
  font-size: 0.75rem;
}

.header-ribbon {
  height: 0.25rem;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-yellow) 50%, var(--color-primary) 100%);
}

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #0A1F44 0%, #0A3D62 100%);
  color: rgba(255, 255, 255, 0.72);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 24px,
    rgba(255, 255, 255, 0.015) 24px,
    rgba(255, 255, 255, 0.015) 26px
  );
  pointer-events: none;
}

.footer-accent {
  position: relative;
  z-index: 1;
  height: 0.3125rem;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-yellow) 50%, var(--color-yellow) 100%);
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-block: 3.5rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
}

.footer-brand-text {
  font-family: var(--font-headline);
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
}

.footer-brand-text em {
  font-style: normal;
  background: var(--color-primary-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.footer-brand-sub {
  margin-top: 0.25rem;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.footer-desc {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 28rem;
}

.footer-trust {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.6);
}

.live-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-primary);
  animation: live-pulse 2s ease-out infinite;
}

@keyframes live-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 78, 0, 0.55);
  }
  100% {
    box-shadow: 0 0 0 0.5rem rgba(255, 78, 0, 0);
  }
}

/* 页脚专栏 */
.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #fff;
}

.footer-col-title::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-yellow);
  transform: rotate(45deg);
  flex: 0 0 auto;
}

.footer-col--support .footer-col-title::before {
  background: var(--color-cyan);
}

.footer-col--contact .footer-col-title::before {
  background: var(--color-primary);
}

.footer-col-list {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col-list a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col-list a:hover {
  color: var(--color-yellow);
  padding-left: 0.25rem;
}

.footer-col-list li {
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.55);
}

.footer-contact-note {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.75rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.4);
}

.footer-contact-note a {
  color: var(--color-yellow);
  text-decoration: none;
}

.footer-contact-note a:hover {
  color: var(--color-primary-light);
}

/* 页脚底部 */
.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 15, 35, 0.4);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding-block: 1.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.45);
}

.footer-copyright {
  margin: 0;
}

.footer-icp {
  margin: 0;
  letter-spacing: 0.06em;
}

/* ---------- 10. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--color-primary-grad);
  color: #fff;
  box-shadow: 0 0.25rem 1.25rem rgba(255, 78, 0, 0.35);
}

.btn--primary:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 0.5rem 1.75rem rgba(255, 78, 0, 0.45);
}

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

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn--dark {
  background: var(--color-deep-blue);
  color: #fff;
  box-shadow: 0 0.25rem 1rem rgba(10, 31, 68, 0.25);
}

.btn--dark:hover {
  background: var(--color-teal);
  color: #fff;
  transform: translateY(-1px);
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn--large {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* ---------- 11. 标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 78, 0, 0.1);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge--yellow {
  background: rgba(255, 214, 0, 0.15);
  color: #7A6500;
}

.badge--dark {
  background: var(--color-deep-blue);
  color: #fff;
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 2.5rem;
  padding: 0;
  list-style: none;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.375rem;
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* ---------- 13. 卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
}

.card--flat {
  box-shadow: none;
}

.card--hover {
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card--hover:hover {
  box-shadow: var(--shadow-float);
  transform: translateY(-0.125rem);
}

/* ---------- 14. 图片容器 ---------- */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-light-bg);
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
}

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

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame--skew {
  border-radius: 0;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
}

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

/* ---------- 15. 内页标题区 ---------- */
.page-hero {
  padding-block: 3rem;
  background: var(--color-light-bg);
  border-bottom: 1px solid var(--color-border);
}

.page-hero__inner {
  max-width: 48rem;
}

.page-hero__eyebrow {
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.page-hero__title {
  margin-bottom: 0.75rem;
}

.page-hero__desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 40rem;
}

.page-hero--dark {
  background: var(--color-deep-blue);
  color: #fff;
  border-bottom: none;
}

.page-hero--dark .page-hero__title {
  color: #fff;
}

.page-hero--dark .page-hero__desc {
  color: rgba(255, 255, 255, 0.65);
}

.page-hero--dark .page-hero__eyebrow {
  color: var(--color-yellow);
}

/* ---------- 16. 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--color-deep-blue);
  color: #fff;
  font-size: 1.125rem;
  cursor: pointer;
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.75rem);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background 0.2s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
}

.back-to-top-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* ---------- 17. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

/* ---------- 18. 响应式 ---------- */
@media (min-width: 768px) {
  :root {
    --container-pad: 1.75rem;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-pad: 2rem;
  }
}

@media (max-width: 1023px) {
  .header-utility-note {
    display: none;
  }

  .header-utility-inner {
    justify-content: flex-end;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--color-deep-blue);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 1.5rem 2rem rgba(10, 31, 68, 0.35);
  }

  .site-nav[data-open] {
    display: block;
  }

  .site-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem var(--container-pad) 1.25rem;
  }

  .nav-link {
    justify-content: space-between;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
  }
}

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

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

  .footer-contact-col {
    grid-column: 1 / -1;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .section {
    padding-block: 2rem;
  }

  .grid {
    gap: 1rem;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .footer-brand-col,
  .footer-contact-col {
    grid-column: auto;
  }

  .footer-bottom-inner {
    justify-content: center;
    text-align: center;
  }

  .header-main-inner {
    min-height: 4rem;
  }

  .brand-logo-text {
    font-size: 1.25rem;
  }

  .header-utility-btn {
    padding: 0.25rem 0.625rem;
    font-size: 0.6875rem;
  }
}

/* ---------- 19. 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

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

  .live-dot {
    animation: none;
  }
}