/* ==========================================================
   安博赛场 · 共享样式 Site CSS
   主题：数据流印刷框架 / Data-Stream Print Frame
   ========================================================== */

/* ---------- 01. 设计令牌 ---------- */
:root {
  --color-bg: #0A1F44;
  --color-bg-deep: #060D21;
  --color-card: #122A52;
  --color-card-solid: #162E5C;
  --color-border: #1E3A6E;
  --color-border-light: #27487E;
  --color-green: #39FF14;
  --color-green-dim: rgba(57, 255, 20, 0.16);
  --color-orange: #FF6B00;
  --color-orange-dim: rgba(255, 107, 0, 0.16);
  --color-white: #FFFFFF;
  --color-text-dim: #B8C0D0;
  --color-success: #00C853;
  --color-warning: #FFB300;
  --color-error: #FF3B30;

  --font-display: "Montserrat", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SF Mono", Consolas, "Noto Sans Mono", monospace;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --header-height: 68px;
  --container-width: 1280px;
  --container-pad: 24px;
  --header-bg: rgba(10, 31, 68, 0.94);
  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;
}

/* ---------- 02. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1 0 auto;
  width: 100%;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 03. 中文排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(34px, 5vw, 64px);
}

h2 {
  font-size: clamp(24px, 3.5vw, 42px);
}

h3 {
  font-size: clamp(18px, 2.4vw, 26px);
}

p {
  margin-bottom: 1em;
}

strong {
  font-weight: 700;
}

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

/* ---------- 04. 布局基元 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-7) var(--space-8);
}

.section--tight {
  padding-block: var(--space-5);
}

.section--dense {
  padding-block: var(--space-4);
}

/* 页面标题区 */
.page-heading {
  padding-block: var(--space-7) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.page-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 3px;
  background: var(--color-orange);
}

.page-heading__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-green);
  background: var(--color-green-dim);
  padding: 2px 10px;
  margin-bottom: var(--space-3);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.page-heading__title {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.page-heading__title span {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-dim);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: 0.2em;
}

.page-heading__desc {
  max-width: 640px;
  color: var(--color-text-dim);
  font-size: 15px;
  margin-top: var(--space-3);
}

/* ---------- 05. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 11px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn--primary {
  background: var(--color-green);
  color: var(--color-bg);
  border-color: var(--color-green);
}

.btn--primary:hover {
  background: var(--color-bg);
  color: var(--color-green);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-border-light);
}

.btn--outline:hover {
  border-color: var(--color-green);
  color: var(--color-green);
  background: var(--color-green-dim);
}

.btn--sm {
  padding: 7px 16px;
  font-size: 13px;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.btn__dot {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: currentColor;
  animation: dot-pulse 2.4s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}

/* ---------- 06. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.tag[data-tag="green"] {
  background: var(--color-green-dim);
  color: var(--color-green);
  border: 1px solid rgba(57, 255, 20, 0.35);
}

.tag[data-tag="orange"] {
  background: var(--color-orange-dim);
  color: var(--color-orange);
  border: 1px solid rgba(255, 107, 0, 0.35);
}

/* ---------- 07. 卡片 ---------- */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  position: relative;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 28px;
  height: 4px;
  background: var(--color-orange);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
  transform: translateY(-2px);
}

.card:hover::after {
  opacity: 1;
}

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

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

/* ---------- 08. 面包屑 ---------- */
.breadcrumb {
  margin-bottom: var(--space-5);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-dim);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--color-border-light);
  margin-left: var(--space-2);
}

.breadcrumb__link {
  color: var(--color-text-dim);
  transition: color var(--transition-fast);
}

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

.breadcrumb__current {
  color: var(--color-white);
  font-weight: 600;
}

/* ---------- 09. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-bg);
  border-bottom: 1px solid var(--color-border);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header--scrolled {
  background: var(--color-bg-deep);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.site-header--scrolled .site-header__inner {
  min-height: 60px;
}

.site-header__signal {
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-green), var(--color-orange));
  z-index: 10;
  pointer-events: none;
  transition: width 60ms linear;
}

.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 3px;
  background: var(--color-orange);
  z-index: 3;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--container-width);
  min-height: var(--header-height);
  margin: 0 auto;
  padding-inline: var(--container-pad);
  transition: min-height var(--transition-base);
}

/* ---------- 10. 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  position: relative;
}

.brand__sigil {
  position: relative;
  display: block;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  background: linear-gradient(135deg, var(--color-green) 0%, var(--color-green) 48%, var(--color-orange) 100%);
  clip-path: polygon(0 0, 100% 14%, 88% 100%, 18% 100%, 0 68%);
}

.brand__sigil-core {
  position: absolute;
  inset: 5px;
  display: block;
  background: var(--color-bg);
  clip-path: polygon(0 0, 100% 8%, 90% 100%, 12% 100%);
}

.brand__title {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--color-white);
}

.brand__meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--color-green);
  margin-top: 2px;
}

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

.brand--footer .brand__meta {
  color: var(--color-text-dim);
}

/* ---------- 11. 导航 ---------- */
.site-nav {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 5px;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-dim);
  text-decoration: none;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--color-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-white);
}

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

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

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--color-orange);
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-orange);
  font-weight: 500;
}

.site-nav__cta {
  display: none;
}

/* ---------- 12. 头部操作区与移动按钮 ---------- */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 0 0 auto;
}

.site-header__cta {
  display: inline-flex;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-white);
  background: transparent;
  border: 1px solid var(--color-border-light);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

.nav-toggle__box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}

.nav-toggle__line {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  flex: 0 0 auto;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  font-size: 14px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-green) 0%, transparent 28%, var(--color-orange) 62%, transparent 100%);
  opacity: 0.7;
  pointer-events: none;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: var(--space-7) var(--space-6);
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-7) var(--container-pad) var(--space-6);
}

.site-footer__brand .brand {
  margin-bottom: var(--space-4);
}

.site-footer__desc {
  color: var(--color-text-dim);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.site-footer__trust {
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  background: var(--color-card);
  border-left: 2px solid var(--color-green);
  padding: var(--space-3) var(--space-4);
  margin-bottom: 0;
}

.site-footer__title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-white);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  position: relative;
  display: inline-block;
}

.site-footer__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-green), transparent 80%);
}

.site-footer__title--spaced {
  margin-top: var(--space-5);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-footer__list a {
  display: inline-block;
  position: relative;
  padding: 3px 0;
  color: var(--color-text-dim);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.site-footer__list a:hover {
  color: var(--color-green);
  transform: translateX(4px);
}

.site-footer__list a::before {
  content: "→";
  position: absolute;
  left: -16px;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  font-family: var(--font-mono);
  font-size: 12px;
}

.site-footer__list a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--color-text-dim);
}

.site-footer__contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-1) 0;
  border-bottom: 1px dashed var(--color-border);
}

.site-footer__contact li span:first-child {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-dim);
  opacity: 0.7;
}

.site-footer__mono {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-white);
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) var(--container-pad);
  max-width: var(--container-width);
  margin: 0 auto;
}

.site-footer__copy,
.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-dim);
  margin: 0;
}

/* ---------- 14. 辅助工具 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-4);
  z-index: 2000;
  padding: 12px 24px;
  background: var(--color-green);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: none;
}

.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;
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 900;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card);
  border: 1px solid var(--color-green);
  color: var(--color-green);
  font-size: 18px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-fast), color var(--transition-fast), visibility 0s linear var(--transition-base);
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-fast), color var(--transition-fast);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--color-green);
  color: var(--color-bg);
  outline: none;
}

/* ---------- 15. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
  border-radius: 1px;
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: -2px;
  border-radius: 0;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1199px) {
  :root {
    --container-pad: 20px;
  }

  .site-nav__link {
    padding: 10px 8px;
    font-size: 14px;
  }

  .site-nav__link::after {
    left: 8px;
    right: 8px;
  }

  .site-header__cta {
    padding: 10px 18px;
    font-size: 13px;
  }
}

@media (max-width: 1023px) {
  :root {
    --header-height: 60px;
  }

  .site-header__inner {
    min-height: var(--header-height);
  }

  .site-header__cta {
    display: none;
  }

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

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    z-index: 1200;
    width: min(420px, 90vw);
    background: linear-gradient(165deg, var(--color-bg-deep) 0%, var(--color-bg) 100%);
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-5);
    padding: var(--space-6) var(--space-5);
    transform: translateX(100%);
    visibility: hidden;
    overflow-y: auto;
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-base), visibility 0s linear var(--transition-base);
  }

  .site-nav::after {
    content: "ANBO ARENA";
    position: absolute;
    bottom: 24px;
    left: 16px;
    font-family: var(--font-mono);
    font-size: 40px;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.04);
    pointer-events: none;
    white-space: nowrap;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--transition-base), visibility 0s linear 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .site-nav__link {
    justify-content: space-between;
    padding: 14px 12px;
    font-size: 16px;
    border-bottom: 1px solid var(--color-border);
  }

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

  .site-nav__link:hover {
    background: var(--color-card);
    color: var(--color-white);
  }

  .site-nav__link[aria-current="page"] {
    background: var(--color-green-dim);
    color: var(--color-green);
    border-bottom-color: rgba(57, 255, 20, 0.3);
  }

  .site-nav__cta {
    display: inline-flex;
    width: 100%;
    margin-top: auto;
  }

  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 767px) {
  :root {
    --container-pad: 16px;
    --space-7: 40px;
  }

  .brand__sigil {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  .brand__name {
    font-size: 16px;
  }

  .brand__meta {
    font-size: 9px;
    letter-spacing: 0.16em;
  }

  .site-nav {
    width: 100vw;
    border-left: none;
    padding: var(--space-5) var(--space-4) var(--space-7);
  }

  .site-nav__link {
    font-size: 15px;
    padding: 12px 8px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding-bottom: var(--space-5);
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
    width: 40px;
    height: 40px;
  }

  .btn {
    padding: 10px 18px;
    font-size: 13px;
  }
}

/* ---------- 17. 减少动态效果 ---------- */
@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;
  }

  .site-header__signal {
    transition: none;
  }

  .site-nav {
    transition: none;
  }

  .site-nav[data-open] {
    transition: none;
  }

  .btn__dot {
    animation: none;
  }

  .back-to-top {
    transition: opacity 0.01ms linear, transform 0.01ms linear;
  }
}