/* ==========================================================================
   易倍体育 / UP YIBEI — 共享样式表
   文件位置：/assets/site.css
   设计语言：数据竞技场 · 杂志排版 × 体育数据
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

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

/* ---------- 2. 变量 ---------- */
:root {
  --red: #E63946;
  --deep-blue: #0D1B2A;
  --silver: #C0C0C0;
  --gold: #D4AF37;
  --light-gray: #F4F4F4;
  --white: #FFFFFF;
  --dark: #1D1D1D;
  --bright-blue: #1DA1F2;

  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: ui-monospace, 'SF Mono', 'Cascadia Code', Consolas, monospace;

  --text-xs: 0.8125rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-xxl: 2.25rem;
  --text-hero: clamp(2.75rem, 6vw, 4rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  --header-h: 76px;
  --header-h-scrolled: 56px;

  --content-max: 1280px;
  --content-pad: clamp(1rem, 4vw, 2.5rem);
  --radius: 2px;
  --transition: 240ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  color: var(--dark);
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--bright-blue);
  text-decoration: underline;
  text-decoration-color: rgba(29, 161, 242, 0.35);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--transition), text-decoration-color var(--transition);
}

a:hover {
  color: var(--red);
  text-decoration-color: currentColor;
}

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

ul,
ol {
  list-style-position: inside;
  margin-bottom: 1rem;
}

address {
  font-style: normal;
}

code,
pre,
kbd {
  font-family: var(--font-data);
  font-size: 0.9em;
}

::selection {
  background: var(--red);
  color: var(--white);
}

:focus-visible {
  outline: 3px solid var(--bright-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 4. 工具类 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--content-pad);
}

.text-vertical {
  writing-mode: vertical-rl;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--silver);
  white-space: nowrap;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 10000;
  background: var(--deep-blue);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top 200ms ease;
}

.skip-link:focus {
  top: 0;
  color: var(--white);
  text-decoration: none;
}

/* ---------- 6. 主内容 ---------- */
#main-content {
  flex: 1 0 auto;
  min-height: 60vh;
  scroll-margin-top: calc(var(--header-h) + 8px);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
}

.btn--primary:hover {
  background: #c93440;
  border-color: #c93440;
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.35);
  color: var(--white);
}

.btn--outline {
  border-color: var(--deep-blue);
  color: var(--deep-blue);
  background: transparent;
}

.btn--outline:hover {
  background: var(--deep-blue);
  color: var(--white);
  box-shadow: 0 6px 20px rgba(13, 27, 42, 0.18);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

/* ---------- 8. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--white);
  border-bottom: 1px solid rgba(13, 27, 42, 0.08);
  transition: height var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 3px;
  background: var(--red);
  z-index: 6;
  pointer-events: none;
  transition: width var(--transition);
}

.site-header.is-scrolled {
  height: var(--header-h-scrolled);
  background: rgba(13, 27, 42, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom-color: rgba(230, 57, 70, 0.4);
  box-shadow: 0 6px 24px rgba(13, 27, 42, 0.22);
}

.site-header.is-scrolled::before {
  width: 36px;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--red), var(--gold));
  z-index: 7;
  pointer-events: none;
  transition: width 160ms linear;
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

/* Brand */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  color: var(--deep-blue);
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  transition: color var(--transition);
}

.brand-mark:hover {
  text-decoration: none;
  color: var(--deep-blue);
}

.brand-mark__name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.4vw, 1.4rem);
  letter-spacing: 0.07em;
  line-height: 1;
  transition: font-size var(--transition), color var(--transition);
}

.brand-mark__accent {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(0.85rem, 1.6vw, 1.05rem);
  line-height: 1;
  color: var(--red);
  margin-left: 3px;
  transform: skewX(-14deg) rotate(-6deg);
  align-self: flex-start;
  transition: font-size var(--transition);
}

.brand-mark__note {
  writing-mode: vertical-rl;
  height: 48px;
  overflow: hidden;
  margin-left: 8px;
  font-family: var(--font-heading);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.2;
  color: var(--silver);
  transition: color var(--transition), opacity var(--transition), visibility var(--transition);
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2.2vw, 2rem);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--deep-blue);
  text-decoration: none;
  text-transform: uppercase;
  transition: color var(--transition);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--red);
  text-decoration: none;
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
}

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

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

/* 滚动后头部 */
.site-header.is-scrolled .brand-mark {
  color: var(--white);
}

.site-header.is-scrolled .brand-mark__note {
  opacity: 0;
  visibility: hidden;
}

.site-header.is-scrolled .brand-mark__name {
  font-size: 1.15rem;
}

.site-header.is-scrolled .brand-mark__accent {
  font-size: 0.9rem;
}

.site-header.is-scrolled .site-nav__link {
  color: rgba(255, 255, 255, 0.88);
}

.site-header.is-scrolled .site-nav__link:hover,
.site-header.is-scrolled .site-nav__link:focus-visible {
  color: var(--red);
}

.site-header.is-scrolled .site-nav__link[aria-current="page"],
.site-header.is-scrolled .site-nav__link--active {
  color: var(--red);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 8px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.nav-toggle:hover {
  background: rgba(13, 27, 42, 0.05);
  border-color: rgba(13, 27, 42, 0.1);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--deep-blue);
  margin: 3px 0;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.site-header.is-scrolled .nav-toggle__bar {
  background: var(--white);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--1 {
  transform: translateY(4px) rotate(45deg) scaleX(1);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--2 {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--3 {
  transform: translateY(-4px) rotate(-45deg) scaleX(1);
}

/* 移动端导航面板 */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(13, 27, 42, 0.98);
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    border-top: 3px solid var(--red);
    transition: max-height 320ms ease, opacity 260ms ease, visibility 0s 320ms;
  }

  .site-nav[data-open="true"] {
    max-height: 480px;
    visibility: visible;
    opacity: 1;
    transition: max-height 320ms ease, opacity 260ms ease;
  }

  .site-nav__link {
    width: 100%;
    display: block;
    padding: 0.9rem 0;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    letter-spacing: 0.08em;
  }

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

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    color: var(--red);
    padding-left: 4px;
  }

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

/* ---------- 9. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--deep-blue);
  color: var(--white);
  overflow: hidden;
  margin-top: auto;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--red) 0%, var(--gold) 42%, var(--gold) 58%, rgba(212, 175, 55, 0.12) 100%);
  z-index: 2;
}

.site-footer::after {
  content: 'EST.2008';
  position: absolute;
  right: 24px;
  bottom: 10px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(4rem, 10vw, 8rem);
  letter-spacing: -0.04em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.022);
  pointer-events: none;
  user-select: none;
  z-index: 0;
  white-space: nowrap;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: var(--space-6) 0 var(--space-5);
  align-items: start;
}

.footer-col,
.footer-col--brand,
.footer-col--nav,
.footer-col--legal,
.footer-col--contact {
  min-width: 0;
}

.footer-col--brand {
  max-width: 38em;
}

.footer-col__title {
  position: relative;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.footer-col__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: var(--red);
}

.footer-mark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  line-height: 1;
  margin-bottom: 1rem;
}

.footer-mark:hover {
  color: var(--white);
  text-decoration: none;
}

.footer-mark__name {
  font-family: var(--font-heading);
  font-weight: 900;
  letter-spacing: 0.08em;
}

.footer-mark__accent {
  font-size: 1.05rem;
  color: var(--red);
  transform: skewX(-14deg) rotate(-6deg);
  align-self: flex-start;
  margin-left: 2px;
}

.footer-col__text {
  font-size: var(--text-sm);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 34em;
}

.footer-links {
  list-style: none;
  margin: 0;
}

.footer-links__item + .footer-links__item {
  margin-top: 0.5rem;
}

.footer-links__link {
  display: inline-block;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-links__link:hover {
  color: var(--white);
  padding-left: 4px;
  text-decoration: none;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-contact__line {
  display: block;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

.footer-contact__line--note {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-bottom__copy {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  margin-bottom: 0;
}

/* ---------- 10. 共享内容块 ---------- */
.section {
  padding-block: var(--space-6);
}

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

.section--dark {
  background-color: var(--deep-blue);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.016) 0,
    rgba(255, 255, 255, 0.016) 1px,
    transparent 1px,
    transparent 9px
  );
  color: rgba(255, 255, 255, 0.85);
}

.section__header {
  margin-bottom: var(--space-4);
}

.section__eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.75rem;
}

.section--dark .section__eyebrow {
  color: var(--gold);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--text-xxl);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--dark);
}

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

.section__lead {
  max-width: 640px;
  margin-top: 0.75rem;
  font-size: var(--text-lg);
  line-height: 1.7;
  color: #555;
}

.section--dark .section__lead {
  color: rgba(255, 255, 255, 0.7);
}

/* 面包屑 */
.breadcrumbs {
  padding: 1.25rem 0 0;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  color: var(--silver);
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs__item:not(:last-child)::after {
  content: '/';
  color: var(--silver);
}

.breadcrumbs__link {
  color: var(--deep-blue);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumbs__link:hover {
  color: var(--red);
  text-decoration: none;
}

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

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: 999px;
  white-space: nowrap;
  text-decoration: none;
}

.tag--red {
  background: rgba(230, 57, 70, 0.08);
  color: var(--red);
  border-color: rgba(230, 57, 70, 0.22);
}

.tag--gold {
  background: rgba(212, 175, 55, 0.1);
  color: #9a7b1e;
  border-color: rgba(212, 175, 55, 0.3);
}

.tag--blue {
  background: rgba(29, 161, 242, 0.1);
  color: #1472a4;
  border-color: rgba(29, 161, 242, 0.24);
}

.tag--dark {
  background: rgba(13, 27, 42, 0.06);
  color: var(--deep-blue);
  border-color: rgba(13, 27, 42, 0.16);
}

.section--dark .tag--dark {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.22);
}

/* 卡片 */
.card {
  background: var(--white);
  border: 1px solid rgba(13, 27, 42, 0.1);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 0 10px 32px rgba(13, 27, 42, 0.08);
  transform: translateY(-3px);
  border-color: rgba(230, 57, 70, 0.3);
}

.card--data {
  font-family: var(--font-data);
  background: var(--white);
}

.section--dark .card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.section--dark .card:hover {
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.3);
  border-color: rgba(212, 175, 55, 0.4);
}

/* 数据网格 */
.data-grid {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  background: var(--white);
}

.data-grid__head {
  background: var(--deep-blue);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-grid__head .data-grid__cell {
  color: var(--white);
  border-bottom: none;
}

.data-grid__row {
  transition: background var(--transition);
}

.data-grid__row:nth-child(even) {
  background: rgba(13, 27, 42, 0.02);
}

.data-grid__row:hover {
  background: rgba(230, 57, 70, 0.04);
}

.data-grid__cell {
  padding: 0.875rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(13, 27, 42, 0.07);
  vertical-align: middle;
}

.data-grid__row:last-child .data-grid__cell {
  border-bottom: none;
}

/* 图片容器 */
.image-frame {
  position: relative;
  overflow: hidden;
  background: var(--light-gray);
  border-radius: var(--radius);
  border: 1px solid rgba(13, 27, 42, 0.06);
}

.image-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.image-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.image-frame--1x1 {
  aspect-ratio: 1 / 1;
}

.image-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  color: var(--silver);
  letter-spacing: 0.06em;
  text-align: center;
}

.image-frame--16x9::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.08) 0%, rgba(29, 161, 242, 0.06) 100%);
  pointer-events: none;
}

/* 内页首屏 */
.page-hero {
  position: relative;
  padding: var(--space-6) 0 var(--space-5);
  border-bottom: 1px solid rgba(13, 27, 42, 0.08);
}

.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  color: var(--silver);
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-hero);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--dark);
  max-width: 11em;
}

.page-hero__lead {
  max-width: 620px;
  margin-top: 1rem;
  font-size: var(--text-lg);
  line-height: 1.75;
  color: #555;
}

.page-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

/* ---------- 11. 响应式微调 ---------- */
@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    row-gap: var(--space-4);
  }
}

@media (max-width: 600px) {
  :root {
    --header-h: 64px;
    --header-h-scrolled: 54px;
  }

  .brand-mark__note {
    display: none;
  }

  .site-nav__link {
    font-size: 1rem;
  }

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

/* ---------- 12. 焦点与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }

  .site-header__progress {
    transition: none;
  }
}