/* ============================================
   微玩赛事站 · 全局共享样式
   文件位置：/assets/site.css
   设计基调：绿茵数据驾驶舱（深绿 x 电光蓝 x 金焰）
   ============================================ */

/* ---------- 重置与设计令牌 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}

:root {
  --c-green: #0B3B24;
  --c-blue: #00A6FF;
  --c-gold: #FFD700;
  --c-sprout: #2ECC71;
  --c-space: #003366;
  --c-ink: #1A1A1A;
  --c-fog: #E5E5E5;
  --c-white: #FFFFFF;

  --font-display: "Oswald", "DIN Alternate", "Bahnschrift", "Arial Narrow", "Arial Black", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --header-height: 72px;
  --container-w: 1440px;
  --border-brutal: 3px;
  --shadow-hard: 8px 8px 0 rgba(0, 0, 0, 0.22);
  --shadow-blue: 8px 8px 0 rgba(0, 166, 255, 0.18);
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--c-green);
  color: rgba(255, 255, 255, 0.86);
  min-height: 100vh;
  overflow-x: hidden;
}

#main-content {
  min-height: 72vh;
  scroll-margin-top: calc(var(--header-height) + 12px);
}

:focus-visible {
  outline: 3px solid var(--c-gold);
  outline-offset: 2px;
}

::selection {
  background: var(--c-blue);
  color: var(--c-green);
}

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

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

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

a {
  color: var(--c-blue);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

p {
  margin-bottom: 1em;
}
p:last-child {
  margin-bottom: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  color: var(--c-white);
  margin-bottom: 0.5em;
}
h1 {
  font-size: clamp(40px, 6vw, 76px);
  letter-spacing: 0.5px;
}
h2 {
  font-size: clamp(28px, 4vw, 44px);
}
h3 {
  font-size: clamp(20px, 2.4vw, 26px);
}
h4 {
  font-size: 18px;
}

/* ---------- 工具类 ---------- */
.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;
}

.site-header__inner,
.site-footer__inner,
.container,
.container--narrow {
  width: min(100% - 48px, var(--container-w));
  margin-inline: auto;
}
.container--narrow {
  width: min(100% - 48px, 960px);
}

/* ---------- 分区与分屏 ---------- */
.section {
  padding: 96px 0;
}
.section--space {
  background: linear-gradient(135deg, var(--c-space) 0%, var(--c-green) 100%);
}
.section--light {
  background: var(--c-fog);
  color: var(--c-ink);
}
.section--light h1,
.section--light h2,
.section--light h3,
.section--light h4,
.section--light h5,
.section--light h6 {
  color: var(--c-ink);
}
.section--light .section-heading__meta {
  color: rgba(26, 26, 26, 0.55);
}
.section--light .data-card {
  background: var(--c-white);
  border-color: rgba(26, 26, 26, 0.12);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, 0.07);
}
.section--light .data-card:hover {
  border-color: var(--c-blue);
  box-shadow: var(--shadow-blue);
  background: var(--c-white);
}
.section--light .data-card__label {
  color: rgba(26, 26, 26, 0.55);
}
.section--light .data-card__value {
  color: var(--c-ink);
}
.section--light .breadcrumb__item a {
  color: rgba(26, 26, 26, 0.6);
}
.section--light .breadcrumb__item[aria-current="page"] {
  color: var(--c-ink);
}

.page-hero {
  position: relative;
  padding: calc(var(--header-height) + 88px) 0 72px;
  background:
    radial-gradient(900px circle at 85% 20%, rgba(0, 166, 255, 0.22), transparent 60%),
    linear-gradient(150deg, var(--c-space) 0%, var(--c-green) 70%);
  border-bottom: 4px solid var(--c-blue);
  overflow: hidden;
}
.page-hero__title {
  font-size: clamp(34px, 5.5vw, 66px);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.page-hero__sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
}

/* ---------- 跳过链接与头部 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 3000;
  background: var(--c-blue);
  color: var(--c-green);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 1px;
  padding: 12px 20px;
  text-decoration: none;
  transition: top 0.25s ease;
}
.skip-link:hover {
  text-decoration: none;
}
.skip-link:focus-visible {
  top: 12px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--c-blue) 0%, var(--c-gold) 100%);
  z-index: 1200;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(11, 59, 36, 0.85) 0%, rgba(11, 59, 36, 0.4) 72%, transparent 100%);
  border-bottom: 2px solid transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(11, 59, 36, 0.95);
  border-bottom-color: rgba(0, 166, 255, 0.45);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.site-header__brand:hover {
  text-decoration: none;
}
.site-header__brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--c-blue);
  color: var(--c-green);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.2);
}
.site-header__brand-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.1;
  color: var(--c-white);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.site-header__brand-text small {
  display: block;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 2.5px;
  color: var(--c-sprout);
  margin-top: 2px;
}

/* ---------- 桌面导航 ---------- */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.site-nav__item {
  margin: 0;
}
.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  transition: color 0.2s ease;
}
.site-nav__link:hover {
  color: var(--c-white);
  text-decoration: none;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 3px;
  background: var(--c-blue);
  transform: scaleX(0) skewX(-20deg);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1) skewX(-20deg);
}
.site-nav__link[aria-current="page"] {
  color: var(--c-white);
}
.site-nav__num {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  color: var(--c-blue);
  letter-spacing: 0.5px;
}
.site-nav__item--cta {
  display: none;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 22px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 1px;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn:hover {
  text-decoration: none;
}
.btn:active {
  transform: translate(1px, 1px);
}
.btn--primary {
  background: var(--c-blue);
  border-color: var(--c-blue);
  color: var(--c-green);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.25);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.btn--primary:hover {
  background: var(--c-sprout);
  border-color: var(--c-sprout);
  color: var(--c-green);
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
}
.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.65);
  color: var(--c-white);
}
.btn--ghost:hover {
  border-color: var(--c-blue);
  color: var(--c-blue);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(0, 166, 255, 0.25);
}
.site-header__cta {
  padding: 11px 18px;
  font-size: 13px;
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.65);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-white);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover {
  border-color: var(--c-blue);
  color: var(--c-blue);
}
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin-bottom: 20px;
  font-size: 13px;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-blue);
  font-weight: 600;
}
.breadcrumb__item a {
  color: rgba(255, 255, 255, 0.68);
  text-decoration: none;
}
.breadcrumb__item a:hover {
  color: var(--c-blue);
  text-decoration: none;
}
.breadcrumb__item[aria-current="page"] {
  color: var(--c-white);
}

/* ---------- 章节标题 ---------- */
.section-heading {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-bottom: 40px;
}
.section-heading__num {
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-blue);
}
.section-heading__title {
  font-size: clamp(22px, 3vw, 32px);
  margin-bottom: 0;
  letter-spacing: 0.5px;
}
.section-heading__meta {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
}

/* ---------- 网格与分屏 ---------- */
.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));
}
.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  min-height: 60vh;
}
.split--narrow-left {
  grid-template-columns: 4fr 8fr;
}
.split--wide-left {
  grid-template-columns: 7fr 5fr;
}

/* ---------- 数据卡 ---------- */
.data-card {
  display: block;
  background: rgba(255, 255, 255, 0.06);
  border: 2px solid rgba(255, 255, 255, 0.14);
  padding: 26px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 166, 255, 0.7);
  box-shadow: var(--shadow-blue);
  background: rgba(255, 255, 255, 0.09);
}
.data-card__label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
}
.data-card__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-white);
}
.data-card__value--accent {
  color: var(--c-blue);
}
.data-card__value--up {
  color: var(--c-sprout);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1px;
  background: rgba(0, 166, 255, 0.14);
  border: 1px solid rgba(0, 166, 255, 0.5);
  color: var(--c-blue);
}
.tag--gold {
  background: rgba(255, 215, 0, 0.12);
  border-color: rgba(255, 215, 0, 0.5);
  color: var(--c-gold);
}
.tag--sprout {
  background: rgba(46, 204, 113, 0.12);
  border-color: rgba(46, 204, 113, 0.5);
  color: var(--c-sprout);
}

/* ---------- 图片容器 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-space);
  border: var(--border-brutal) solid rgba(0, 166, 255, 0.3);
  box-shadow: var(--shadow-hard);
}
.img-frame img,
.img-frame .img-placeholder {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--ratio-16-9 {
  aspect-ratio: 16 / 9;
}
.img-frame--ratio-4-3 {
  aspect-ratio: 4 / 3;
}
.img-frame--ratio-3-2 {
  aspect-ratio: 3 / 2;
}
.img-frame--ratio-1-1 {
  aspect-ratio: 1 / 1;
}
.img-frame__overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: 20px 16px 12px;
  background: linear-gradient(180deg, transparent, rgba(11, 59, 36, 0.92));
  color: var(--c-white);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
}

/* ---------- 装饰数字 ---------- */
.highlight-num {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(64px, 12vw, 180px);
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 2px rgba(0, 166, 255, 0.45);
  user-select: none;
  pointer-events: none;
}

/* ---------- 滚动显现协议 ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
html.js [data-reveal="left"] {
  transform: translateX(-36px);
}
html.js [data-reveal="right"] {
  transform: translateX(36px);
}
html.js [data-reveal="fade"] {
  transform: none;
}
html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(700px circle at 85% 10%, rgba(0, 166, 255, 0.12), transparent 65%),
    var(--c-green);
  color: rgba(255, 255, 255, 0.78);
  border-top: 2px solid rgba(0, 166, 255, 0.4);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--c-blue) 0%, var(--c-sprout) 40%, var(--c-gold) 100%);
}
.site-footer__inner {
  position: relative;
  padding: 72px 0 32px;
}
.site-footer__inner::after {
  content: "DATA";
  position: absolute;
  right: 0;
  bottom: 48px;
  z-index: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(90px, 14vw, 190px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 166, 255, 0.13);
  pointer-events: none;
}
.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.7fr 1fr 1.25fr 1fr;
  gap: 48px;
}
.site-footer__nav,
.site-footer__contact,
.site-footer__legal {
  min-width: 0;
}
.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.site-footer__brand:hover {
  text-decoration: none;
}
.site-footer__brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--c-blue);
  color: var(--c-green);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.site-footer__brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--c-white);
  letter-spacing: 0.5px;
}
.site-footer__brand-name small {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--c-sprout);
}
.site-footer__trust {
  max-width: 360px;
  margin-top: 22px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.68);
  border-left: 3px solid var(--c-gold);
  padding-left: 16px;
}
.site-footer__tagline {
  margin-top: 18px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-blue);
}
.site-footer__heading {
  display: inline-block;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(0, 166, 255, 0.4);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-white);
}
.site-footer__links {
  display: grid;
  gap: 10px;
}
.site-footer__links a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color 0.2s ease, transform 0.2s ease;
}
.site-footer__links a:hover {
  color: var(--c-blue);
  transform: translateX(5px);
  text-decoration: none;
}
.site-footer__contact-line {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.7);
}
.site-footer__contact-alt {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}
.site-footer__contact-alt strong {
  color: var(--c-gold);
  font-weight: 500;
}
.site-footer__bottom {
  position: relative;
  z-index: 1;
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- 响应式：平板首档 1199 ---------- */
@media (max-width: 1199px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-header__cta {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height));
    margin: 0;
    padding: 40px 32px 48px;
    background: linear-gradient(160deg, rgba(0, 51, 102, 0.85) 0%, transparent 45%), var(--c-green);
    border-top: 2px solid var(--c-blue);
    overflow-y: auto;
    visibility: hidden;
    transform: translateX(101%);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 0.35s;
    z-index: 999;
  }
  .site-nav::before {
    content: "MAP / 06";
    position: absolute;
    right: 16px;
    bottom: 12px;
    font-family: var(--font-display);
    font-size: 72px;
    font-weight: 700;
    line-height: 1;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0, 166, 255, 0.16);
    pointer-events: none;
  }
  .site-header[data-open="true"] .site-nav {
    visibility: visible;
    transform: translateX(0);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    max-width: 640px;
    margin: 0 auto;
  }
  .site-nav__link {
    width: 100%;
    padding: 18px 8px;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 1px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }
  .site-nav__link::after {
    bottom: 0;
  }
  .site-nav__num {
    font-size: 13px;
  }
  .site-nav__item--cta {
    display: block;
    margin-top: 28px;
  }
  .site-nav__cta {
    display: block;
    width: 100%;
    text-align: center;
    padding: 16px 22px;
    font-size: 16px;
  }

  .site-header[data-open="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .site-header[data-open="true"] .nav-toggle__bar:nth-child(2) {
    transform: scaleX(0);
    opacity: 0;
  }
  .site-header[data-open="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  body.nav-open {
    overflow: hidden;
  }
}

/* ---------- 响应式：平板二档 991 ---------- */
@media (max-width: 991px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .split,
  .split--narrow-left,
  .split--wide-left {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 72px 0;
  }
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .site-footer__brand-block {
    grid-column: 1 / -1;
  }
}

/* ---------- 响应式：手机三档 767 ---------- */
@media (max-width: 767px) {
  :root {
    --header-height: 62px;
  }
  .page-hero {
    padding: calc(var(--header-height) + 64px) 0 52px;
  }
}

/* ---------- 响应式：手机四档 599 ---------- */
@media (max-width: 599px) {
  .site-header__inner,
  .site-footer__inner,
  .container,
  .container--narrow {
    width: min(100% - 32px, var(--container-w));
  }
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .site-footer__inner {
    padding: 56px 0 24px;
  }
  .site-footer__bottom {
    justify-content: center;
    text-align: center;
  }
  .section-heading {
    gap: 8px 12px;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* ---------- 减少动态偏好 ---------- */
@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: 0ms !important;
  }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .scroll-progress {
    display: none;
  }
  .data-card:hover,
  .btn:hover,
  .btn--primary:hover,
  .btn--ghost:hover {
    transform: none;
  }
}