/* ========================================
   Site Kit · 华体育
   共享样式表 /assets/site.css
   深绿 x 金色 · 数据叙事 · 竞技张力
   ======================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --sis-green: #0A3D2E;
  --sis-green-deep: #062A20;
  --sis-green-soft: #0E4A38;
  --sis-gold: #D4AF37;
  --sis-gold-dark: #996515;
  --sis-red: #E63946;
  --sis-mint: #A8D5BA;
  --sis-carbon: #1A1A1A;
  --sis-cloud: #F8F9FA;
  --sis-rice: #F5F0E6;
  --sis-teal: #2A9D8F;
  --sis-line: #E0E0E0;
  --sis-radius: 14px;
  --sis-radius-sm: 8px;
  --sis-radius-lg: 24px;
  --sis-shadow: 0 10px 32px rgba(10, 61, 46, 0.12);
  --sis-shadow-red: 3px 3px 0 var(--sis-red);
  --sis-font: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
  --sis-mono: "SFMono-Regular", ui-monospace, "Menlo", "Consolas", "Liberation Mono", monospace;
  --sis-container: 1200px;
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--sis-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--sis-carbon);
  background: var(--sis-cloud);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
  outline: none;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
  margin: 0;
}

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

a {
  color: var(--sis-gold-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--sis-green);
}

[id] {
  scroll-margin-top: 90px;
}

/* ---------- 3. 焦点与可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--sis-gold);
  outline-offset: 2px;
}

.sis-skip {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 10001;
  display: inline-block;
  padding: 12px 20px;
  background: var(--sis-gold);
  color: var(--sis-green-deep);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 var(--sis-radius-sm) var(--sis-radius-sm);
  box-shadow: var(--sis-shadow);
  opacity: 0;
  transition: top 0.25s ease, opacity 0.25s ease;
}

.sis-skip:focus {
  top: 8px;
  opacity: 1;
}

/* ---------- 4. 顶部滚动进度 ---------- */
.sis-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  width: 100%;
  height: 3px;
  background: rgba(212, 175, 55, 0.2);
  pointer-events: none;
}

.sis-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--sis-gold) 0%, var(--sis-red) 100%);
}

/* ---------- 5. 容器与章节 ---------- */
.sis-container {
  width: min(100% - 40px, var(--sis-container));
  margin-inline: auto;
}

.sis-container--narrow {
  width: min(100% - 40px, 920px);
  margin-inline: auto;
}

.sis-section {
  position: relative;
  padding: 72px 0;
}

.sis-section--rice {
  background: var(--sis-rice);
}

.sis-section--green {
  background: var(--sis-green);
  color: var(--sis-cloud);
}

.sis-section__head {
  max-width: 720px;
  margin-bottom: 40px;
}

.sis-section__sub {
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sis-gold-dark);
}

.sis-section--green .sis-section__sub {
  color: var(--sis-gold);
}

.sis-section__title {
  display: inline-block;
  transform: skewX(-3deg);
  font-size: 36px;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.sis-section--green .sis-section__title {
  color: var(--sis-cloud);
}

/* ---------- 6. 栅格 ---------- */
.sis-grid {
  display: grid;
  gap: 24px;
}

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

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

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

.sis-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

/* ---------- 7. 页头 ---------- */
.sis-header {
  position: sticky;
  top: 0;
  z-index: 800;
  background: var(--sis-green);
  box-shadow: 0 2px 18px rgba(6, 42, 32, 0.32);
}

.sis-header__bar {
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
}

.sis-header__bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.sis-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--sis-cloud);
  text-decoration: none;
}

.sis-brand:hover {
  color: var(--sis-cloud);
}

.sis-brand__mark {
  display: inline-flex;
  flex-shrink: 0;
  color: var(--sis-gold);
}

.sis-brand__name {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.15;
}

.sis-brand__text {
  display: inline-block;
  transform: skewX(-5deg);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--sis-gold);
}

.sis-brand--footer .sis-brand__text {
  font-size: 22px;
}

.sis-brand__sub {
  transform: skewX(-5deg);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(248, 249, 250, 0.55);
}

.sis-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sis-header__count {
  font-family: var(--sis-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  color: rgba(248, 249, 250, 0.55);
  white-space: nowrap;
}

.sis-header__count em {
  font-style: normal;
  font-family: var(--sis-mono);
  font-size: 17px;
  font-weight: 800;
  color: var(--sis-gold);
}

.sis-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  background: var(--sis-gold);
  color: var(--sis-green-deep);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: var(--sis-radius-sm);
  box-shadow: var(--sis-shadow-red);
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.sis-cta:hover {
  background: #E3C553;
  color: var(--sis-green-deep);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--sis-red);
}

.sis-cta:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--sis-red);
}

.sis-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(212, 175, 55, 0.45);
  background: transparent;
  border-radius: var(--sis-radius-sm);
  cursor: pointer;
}

.sis-nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  margin: 3px 0;
  background: var(--sis-gold);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.sis-nav-toggle[aria-expanded="true"] .sis-nav-toggle__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.sis-nav-toggle[aria-expanded="true"] .sis-nav-toggle__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---------- 8. 导航 ---------- */
.sis-nav {
  background: var(--sis-green-deep);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.06) 0px,
    rgba(212, 175, 55, 0.06) 2px,
    transparent 2px,
    transparent 10px
  );
  border-bottom: 2px solid rgba(212, 175, 55, 0.35);
}

.sis-nav__list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sis-nav__item {
  position: relative;
}

.sis-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 14px 18px 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: rgba(248, 249, 250, 0.82);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.sis-nav__link:hover {
  color: var(--sis-gold);
  background: rgba(212, 175, 55, 0.08);
}

.sis-nav__link[aria-current="page"] {
  color: var(--sis-gold);
  border-bottom-color: var(--sis-gold);
  background: rgba(212, 175, 55, 0.1);
}

.sis-nav__num {
  margin-right: 8px;
  font-family: var(--sis-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--sis-gold);
  opacity: 0.55;
}

.sis-nav__link[aria-current="page"] .sis-nav__num {
  opacity: 1;
}

/* ---------- 9. 按钮 ---------- */
.sis-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--sis-radius-sm);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.sis-btn--gold {
  background: var(--sis-gold);
  color: var(--sis-green-deep);
  box-shadow: var(--sis-shadow-red);
}

.sis-btn--gold:hover {
  background: #E3C553;
  color: var(--sis-green-deep);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--sis-red);
}

.sis-btn--outline {
  border-color: var(--sis-gold);
  background: transparent;
  color: var(--sis-gold);
}

.sis-btn--outline:hover {
  background: var(--sis-gold);
  color: var(--sis-green-deep);
}

.sis-btn--red {
  background: var(--sis-red);
  color: var(--sis-cloud);
}

.sis-btn--red:hover {
  background: #F04A56;
  color: var(--sis-cloud);
}

/* ---------- 10. 卡片 ---------- */
.sis-card {
  padding: 24px;
  background: var(--sis-cloud);
  border: 1px solid var(--sis-line);
  border-radius: var(--sis-radius);
  box-shadow: 0 4px 16px rgba(10, 61, 46, 0.07);
}

.sis-card--dark {
  background: var(--sis-green);
  border-color: var(--sis-green);
  color: var(--sis-cloud);
}

.sis-card__title {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.3;
}

.sis-card--dark .sis-card__title {
  color: var(--sis-cloud);
}

.sis-card__body {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(26, 26, 26, 0.82);
}

.sis-card--dark .sis-card__body {
  color: rgba(248, 249, 250, 0.78);
}

.sis-card__meta {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--sis-gold-dark);
}

/* ---------- 11. 首屏与分屏 ---------- */
.sis-hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 88px;
  background: linear-gradient(125deg, var(--sis-green-deep) 0%, var(--sis-green) 45%, var(--sis-green-soft) 100%);
  color: var(--sis-cloud);
}

.sis-hero::before {
  content: "";
  position: absolute;
  top: -15%;
  right: -6%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.2) 0%, rgba(212, 175, 55, 0) 70%);
  transform: rotate(10deg);
  pointer-events: none;
}

.sis-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.sis-hero__eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sis-gold);
}

.sis-hero__title {
  display: inline-block;
  margin: 14px 0 18px;
  transform: skewX(-4deg);
  font-size: 48px;
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.sis-hero__lead {
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(248, 249, 250, 0.82);
}

.sis-hero__visual {
  position: relative;
  min-height: 320px;
}

.sis-hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.13) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 78%);
  pointer-events: none;
}

.sis-hero__visual::after {
  content: "";
  position: absolute;
  inset: 16%;
  border: 2px dashed rgba(212, 175, 55, 0.35);
  border-radius: 50%;
  pointer-events: none;
}

/* ---------- 12. 数据与索引 ---------- */
.sis-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 20px 12px;
  text-align: center;
}

.sis-data__num {
  font-family: var(--sis-mono);
  font-size: 46px;
  line-height: 1;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  color: var(--sis-gold);
}

.sis-data__num--dark {
  color: var(--sis-gold-dark);
}

.sis-data__label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: rgba(248, 249, 250, 0.66);
}

.sis-index {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--sis-line);
}

.sis-index li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--sis-line);
  font-size: 14px;
}

.sis-index__label {
  font-weight: 600;
  color: var(--sis-carbon);
}

.sis-index__value {
  font-family: var(--sis-mono);
  font-variant-numeric: tabular-nums;
  color: var(--sis-gold-dark);
  white-space: nowrap;
}

/* ---------- 13. 标签与提示 ---------- */
.sis-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(212, 175, 55, 0.16);
  color: var(--sis-gold-dark);
}

.sis-badge--hot {
  background: var(--sis-red);
  color: var(--sis-cloud);
}

/* ---------- 14. 标签页 ---------- */
.sis-tabs {
  position: relative;
}

.sis-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  border-bottom: 2px solid var(--sis-line);
}

.sis-tabs__btn {
  display: inline-block;
  padding: 10px 18px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: 15px;
  font-weight: 700;
  color: var(--sis-carbon);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.sis-tabs__btn:hover {
  color: var(--sis-green);
}

.sis-tabs__btn.is-active {
  color: var(--sis-green);
  border-bottom-color: var(--sis-gold);
}

.sis-tabs__panel {
  display: block;
}

.sis-tabs__panel[hidden] {
  display: none;
}

/* ---------- 15. 面包屑 ---------- */
.sis-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.sis-breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sis-breadcrumbs li + li::before {
  content: "/";
  font-weight: 700;
  color: var(--sis-line);
}

.sis-breadcrumbs a {
  font-weight: 600;
  color: var(--sis-gold-dark);
  text-decoration: none;
}

.sis-breadcrumbs a:hover {
  color: var(--sis-green);
  text-decoration: underline;
}

.sis-breadcrumbs [aria-current="page"] {
  font-weight: 700;
  color: var(--sis-carbon);
}

/* ---------- 16. 图片占位 ---------- */
.sis-img-holder {
  position: relative;
  overflow: hidden;
  background: var(--sis-rice);
  border-radius: var(--sis-radius);
}

.sis-img-holder::after {
  content: "";
  display: block;
}

.sis-img-holder--16x9::after {
  padding-top: 56.25%;
}

.sis-img-holder--4x3::after {
  padding-top: 75%;
}

.sis-img-holder--1x1::after {
  padding-top: 100%;
}

.sis-img-holder__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sis-img-holder__ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sis-gold-dark);
}

/* ---------- 17. 滚动显现 ---------- */
.js .sis-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .sis-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js .sis-reveal[data-reveal-delay="1"] {
  transition-delay: 0.12s;
}

.js .sis-reveal[data-reveal-delay="2"] {
  transition-delay: 0.24s;
}

.js .sis-reveal[data-reveal-delay="3"] {
  transition-delay: 0.36s;
}

/* ---------- 18. 页脚 ---------- */
.sis-footer {
  position: relative;
  background: var(--sis-green-deep);
  color: rgba(248, 249, 250, 0.78);
}

.sis-footer__main {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1.2fr 1.6fr;
  gap: 40px;
  padding: 64px 0 48px;
}

.sis-footer__col--brand .sis-brand {
  margin-bottom: 18px;
}

.sis-footer__trust {
  max-width: 300px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(248, 249, 250, 0.6);
}

.sis-footer__heading {
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sis-gold);
}

.sis-footer__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sis-footer__list a {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(248, 249, 250, 0.65);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.sis-footer__list a:hover {
  color: var(--sis-gold);
  transform: translateX(3px);
}

.sis-footer__contact-line {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(248, 249, 250, 0.75);
}

.sis-footer__note {
  max-width: 30em;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(248, 249, 250, 0.5);
}

.sis-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid rgba(212, 175, 55, 0.18);
  font-size: 13px;
  color: rgba(248, 249, 250, 0.48);
}

.sis-footer__copyright,
.sis-footer__icp {
  margin: 0;
}

/* ---------- 19. 返回顶部 ---------- */
.sis-backtop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--sis-gold);
  color: var(--sis-green-deep);
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(230, 57, 70, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

.sis-backtop:hover {
  background: #E3C553;
}

.sis-backtop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1024px) {
  .sis-footer__main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .sis-hero__inner {
    gap: 36px;
  }
}

@media (max-width: 960px) {
  #main-content,
  [id] {
    scroll-margin-top: 70px;
  }

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

  .sis-nav {
    display: none;
  }

  .sis-nav[data-open] {
    display: block;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }

  .sis-nav__list {
    flex-direction: column;
    gap: 2px;
    padding: 6px 0 16px;
  }

  .sis-nav__link {
    padding: 13px 18px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .sis-nav__link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--sis-gold);
  }

  .sis-header__count {
    display: none;
  }

  .sis-hero__inner {
    grid-template-columns: 1fr;
  }

  .sis-split {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .sis-hero {
    padding: 56px 0 64px;
  }

  .sis-hero__title {
    font-size: 38px;
  }

  .sis-section {
    padding: 56px 0;
  }
}

@media (max-width: 600px) {
  .sis-header__bar-inner {
    min-height: 60px;
  }

  .sis-cta {
    padding: 8px 12px;
    font-size: 13px;
    box-shadow: 2px 2px 0 var(--sis-red);
  }

  .sis-brand__text {
    font-size: 22px;
  }

  .sis-brand__mark svg {
    width: 36px;
    height: 24px;
  }

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

  .sis-footer__main {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 48px;
  }

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

  .sis-hero__title {
    font-size: 32px;
  }

  .sis-hero__visual {
    min-height: 220px;
  }

  .sis-backtop {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
}

/* ---------- 21. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

  html {
    scroll-behavior: auto;
  }

  .js .sis-reveal {
    opacity: 1;
    transform: none;
  }

  .sis-progress {
    display: none;
  }
}