/* ==========================================================================
   NORTH · 共享外壳样式 /assets/site.css
   极地夜航：深蓝底色 + 冰晶青索引线 + 信号橙关键点 + 暖白纸面正文
   ========================================================================== */

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.05vw, 17px);
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, rgba(33, 26, 23, 0.035) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(90deg, rgba(33, 26, 23, 0.035) 0 1px, transparent 1px 96px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main,
#main-content {
  flex: 1 0 auto;
}

img,
picture,
svg,
video {
  max-width: 100%;
}

img {
  height: auto;
  display: block;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

p {
  margin: 0;
}

/* ---------- 2. 变量 ---------- */
:root {
  --polar: #0A1B33;
  --night: #102A4C;
  --ice: #5FE0D0;
  --ice-soft: #BFF7F0;
  --signal: #FF7A3D;
  --paper: #F7F3EA;
  --ink: #211A17;
  --mist: #6C8199;
  --glacier: #2FA89A;
  --aurora: #7B6CF6;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
    Consolas, "Liberation Mono", monospace;

  --shell-w: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --cut: 16px;
  --focus: var(--polar);
}

/* ---------- 3. 中文排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.6em;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.14;
  color: inherit;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 5.6rem);
  line-height: 1.02;
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
}

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

strong,
b {
  font-weight: 700;
}

small {
  font-size: 0.82em;
  color: var(--mist);
}

/* 焦点：浅底用极地深蓝，深底外壳覆盖为冰晶青 */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 4. 布局基础 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.page {
  padding-block: clamp(22px, 3.2vw, 40px) clamp(48px, 7vw, 88px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
}

@media (min-width: 700px) {
  .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  top: -140px;
  left: clamp(12px, 3vw, 28px);
  z-index: 200;
  padding: 0.7rem 1.1rem;
  background: var(--paper);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 2px solid var(--polar);
  transition: top 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0.7rem;
  outline-color: var(--polar);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.68rem 1.2rem;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease), transform 0.2s var(--ease);
}

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

.btn--signal {
  background: var(--signal);
  color: var(--ink);
  border-color: var(--signal);
}

.btn--signal:hover {
  background: #ff9165;
  border-color: #ff9165;
  --focus: var(--polar);
}

.btn--ghost {
  background: transparent;
  color: var(--ice-soft);
  border-color: rgba(95, 224, 208, 0.45);
}

.btn--ghost:hover {
  background: rgba(95, 224, 208, 0.12);
  border-color: var(--ice);
  color: var(--paper);
}

.btn--line {
  background: var(--paper);
  color: var(--ink);
  border-color: rgba(33, 26, 23, 0.35);
}

.btn--line:hover {
  background: var(--ice-soft);
  border-color: var(--polar);
}

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  padding-block: clamp(14px, 2vw, 22px) 0;
}

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--mist);
}

.crumbs__link {
  color: var(--ink);
  border-bottom: 1px solid rgba(33, 26, 23, 0.3);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.crumbs__link:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.crumbs__sep {
  color: var(--mist);
  opacity: 0.7;
}

/* ---------- 8. 通用区块 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.panel {
  position: relative;
  background: var(--paper);
  border: 1px solid rgba(33, 26, 23, 0.16);
  padding: clamp(18px, 2.4vw, 28px);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 44px;
  height: 3px;
  background: var(--ice);
  transition: width 0.22s var(--ease), background-color 0.22s var(--ease);
}

.panel:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 61, 0.55);
}

.panel:hover::before {
  width: 88px;
  background: var(--signal);
}

.panel__title {
  margin: 0 0 0.5em;
  font-size: clamp(1.05rem, 1.7vw, 1.25rem);
  letter-spacing: 0.05em;
}

.panel__text {
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(33, 26, 23, 0.78);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.22rem 0.62rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  background: var(--ice-soft);
  color: var(--polar);
  border: 1px solid rgba(10, 27, 51, 0.14);
}

.tag--signal {
  background: var(--signal);
  color: var(--ink);
  border-color: transparent;
}

.tag--dark {
  background: rgba(95, 224, 208, 0.14);
  color: var(--ice-soft);
  border-color: rgba(95, 224, 208, 0.42);
}

.rule {
  height: 1px;
  margin: clamp(24px, 4vw, 48px) 0;
  border: 0;
  background: linear-gradient(90deg, var(--signal), rgba(95, 224, 208, 0.55), transparent);
}

/* ---------- 9. 长文阅读 ---------- */
.prose {
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink);
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h1 {
  font-size: clamp(2rem, 3.6vw, 2.9rem);
  letter-spacing: 0.03em;
}

.prose h2 {
  margin-top: 2em;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  letter-spacing: 0.03em;
}

.prose h3 {
  margin-top: 1.7em;
  font-size: 1.14rem;
}

.prose ul,
.prose ol {
  padding-left: 1.35em;
  list-style-position: outside;
}

.prose li + li {
  margin-top: 0.4em;
}

.prose a {
  color: var(--night);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

.prose a:hover {
  color: var(--signal);
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 3px solid var(--ice);
  color: rgba(33, 26, 23, 0.75);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  background: rgba(95, 224, 208, 0.22);
}

/* ---------- 10. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--night);
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(95, 224, 208, 0.42);
  box-shadow: inset 0 0 60px -20px rgba(123, 108, 246, 0.55);
}

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

.media-frame--tall {
  aspect-ratio: 4 / 5;
}

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

.img-placeholder {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 130% at 80% 0%, rgba(123, 108, 246, 0.42), transparent 62%),
    linear-gradient(135deg, var(--polar), var(--night) 55%, #1c3c63);
}

.img-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(95, 224, 208, 0.16) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(95, 224, 208, 0.1) 0 1px, transparent 1px 44px);
}

/* ---------- 11. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  --focus: var(--ice);
  background: var(--polar);
  color: var(--paper);
  border-bottom: 1px solid rgba(95, 224, 208, 0.22);
}

.header-top {
  background:
    radial-gradient(120% 190% at 84% -50%, rgba(123, 108, 246, 0.38), transparent 60%),
    radial-gradient(90% 150% at 2% 130%, rgba(95, 224, 208, 0.16), transparent 58%),
    var(--polar);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: clamp(64px, 8vw, 84px);
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex: none;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: clamp(36px, 4.4vw, 44px);
  height: clamp(36px, 4.4vw, 44px);
  background: linear-gradient(150deg, var(--ice), #9ff0e6 58%, var(--ice-soft));
  color: var(--polar);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  transition: transform 0.22s var(--ease);
}

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

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-size: clamp(0.98rem, 1.5vw, 1.12rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand__code {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--ice);
}

.header-note {
  margin: 0;
  padding-left: clamp(10px, 1.6vw, 18px);
  border-left: 1px solid rgba(95, 224, 208, 0.32);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: rgba(247, 243, 234, 0.58);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
  flex: none;
}

/* 导航层 */
.header-bar {
  position: relative;
  background: var(--night);
  border-top: 1px solid rgba(95, 224, 208, 0.16);
}

.scroll-meter {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  display: block;
  pointer-events: none;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--ice), var(--signal));
}

.header-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 16px;
  min-height: 56px;
}

.primary-nav {
  display: none;
  order: 2;
  width: 100%;
}

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

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(6px, 1.6vw, 26px);
  list-style: none;
}

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.5em;
  padding: 0.95rem 0.1rem;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(247, 243, 234, 0.72);
  transition: color 0.18s var(--ease);
}

.primary-nav__idx {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--ice);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.22s var(--ease);
}

.primary-nav__link:hover {
  color: var(--ice-soft);
}

.primary-nav__link:hover .primary-nav__idx {
  color: var(--ice);
}

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

.primary-nav__link[aria-current="page"] {
  color: var(--paper);
  font-weight: 700;
}

.primary-nav__link[aria-current="page"] .primary-nav__idx {
  color: var(--signal);
}

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

/* 抽屉按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.55rem 0.85rem;
  background: transparent;
  color: var(--ice-soft);
  border: 1px solid rgba(95, 224, 208, 0.42);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-toggle:hover {
  background: rgba(95, 224, 208, 0.12);
  border-color: var(--ice);
}

.nav-toggle__icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 10px;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s var(--ease);
}

.nav-toggle__icon::before {
  top: 0;
}

.nav-toggle__icon::after {
  bottom: 0;
}

.site-header[data-open] .nav-toggle__icon::before {
  transform: translateY(4px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__icon::after {
  transform: translateY(-4px) rotate(-45deg);
}

/* 移动端抽屉内容 */
@media (max-width: 899px) {
  .header-note {
    display: none;
  }

  .header-actions .btn--ghost {
    display: none;
  }

  .header-actions .btn {
    padding: 0.55rem 0.85rem;
    font-size: 0.8rem;
  }

  .primary-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 0.35rem 0 1rem;
  }

  .primary-nav__item {
    border-top: 1px solid rgba(95, 224, 208, 0.14);
  }

  .primary-nav__link {
    width: 100%;
    padding: 0.85rem 0.2rem;
    font-size: 1rem;
  }

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

  .primary-nav__link[aria-current="page"] {
    color: var(--ice-soft);
  }
}

@media (min-width: 900px) {
  .primary-nav,
  .site-header[data-open] .primary-nav {
    display: block;
    order: 0;
    width: auto;
  }

  .nav-toggle {
    display: none;
  }

  .header-bar__inner {
    min-height: 0;
  }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  --focus: var(--ice);
  color: rgba(247, 243, 234, 0.78);
  border-top: 1px solid rgba(95, 224, 208, 0.25);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(123, 108, 246, 0.22), transparent 58%),
    radial-gradient(90% 130% at 0% 100%, rgba(95, 224, 208, 0.14), transparent 62%),
    var(--polar);
}

.footer-top {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 72px) clamp(32px, 4vw, 52px);
}

@media (min-width: 880px) {
  .footer-top {
    grid-template-columns: minmax(210px, 1fr) 2.3fr;
    align-items: start;
  }
}

.footer-brand__mark {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6.5vw, 4rem);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: 0.16em;
  color: rgba(95, 224, 208, 0.92);
  text-shadow: 0 0 30px rgba(95, 224, 208, 0.35);
}

.footer-brand__tag {
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  color: rgba(247, 243, 234, 0.62);
}

.footer-nav {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

@media (min-width: 620px) {
  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .footer-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.footer-col__title {
  margin: 0 0 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(95, 224, 208, 0.24);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ice);
}

.footer-col__list {
  list-style: none;
}

.footer-link {
  position: relative;
  display: inline-block;
  padding: 0.34rem 0;
  font-size: 0.93rem;
  color: rgba(247, 243, 234, 0.76);
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--signal);
  transition: width 0.18s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--ice-soft);
  padding-left: 14px;
}

.footer-link:hover::before,
.footer-link:focus-visible::before {
  width: 9px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.1rem 0.7rem;
  padding: 0.34rem 0;
  font-size: 0.9rem;
}

.footer-contact__key {
  flex: none;
  min-width: 4.4em;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  line-height: 1.9;
  color: var(--mist);
}

.footer-contact__val {
  color: rgba(247, 243, 234, 0.86);
  word-break: break-word;
}

.footer-legal {
  background: rgba(10, 27, 51, 0.6);
  border-top: 1px solid rgba(95, 224, 208, 0.2);
}

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.6rem;
  padding-block: 1.1rem;
}

.footer-copy,
.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: rgba(247, 243, 234, 0.6);
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 95;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.6rem 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--ice-soft);
  background: var(--night);
  border: 1px solid rgba(95, 224, 208, 0.45);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
    visibility 0.2s var(--ease), border-color 0.2s var(--ease);
}

.to-top:hover {
  border-color: var(--ice);
  color: var(--paper);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 13. 响应式收尾 ---------- */
@media (max-width: 619px) {
  .header-top__inner {
    flex-wrap: wrap;
  }

  .header-actions {
    margin-left: auto;
  }

  .footer-legal__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 14. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .panel:hover,
  .btn:hover,
  .brand:hover .brand__mark {
    transform: none;
  }

  .footer-link:hover,
  .footer-link:focus-visible {
    padding-left: 0;
  }

  .footer-link:hover::before,
  .footer-link:focus-visible::before {
    width: 0;
  }

  .to-top {
    transform: none;
  }

  .to-top[data-visible="true"] {
    transform: none;
  }
}