/* ==========================================================================
   瑞祥电竞站 · 赛事通体育 — 共享样式表 /assets/site.css
   骨架：堆叠面板 + 紧凑命令栏 + 左侧排名轴 + 近单色深空配色
   ========================================================================== */

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

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol, pre { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { width: 100%; border-collapse: collapse; }
[hidden] { display: none !important; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --rx-void: #070B18;
  --rx-panel: #0E1526;
  --rx-raise: #16203A;
  --rx-stroke: #24314F;
  --rx-ink: #E6EDF7;
  --rx-mute: #8FA0C4;
  --rx-cyan: #22E0C8;
  --rx-violet: #7A4DFF;
  --rx-amber: #FF8A34;
  --rx-cyan-fill: rgba(34, 224, 200, 0.12);
  --rx-violet-fill: rgba(122, 77, 255, 0.14);
  --rx-amber-fill: rgba(255, 138, 52, 0.14);
  --rx-cyan-soft: rgba(34, 224, 200, 0.45);
  --rx-ink-dim: rgba(230, 237, 247, 0.72);

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

  /* 排版层级（六档：60 → 24） */
  --rx-fs-display: clamp(40px, 7vw, 60px);
  --rx-fs-h1: clamp(30px, 4.4vw, 46px);
  --rx-fs-h2: clamp(24px, 3vw, 34px);
  --rx-fs-h3: clamp(19px, 2.2vw, 24px);
  --rx-fs-body: 17px;
  --rx-fs-small: 14px;
  --rx-fs-mono: 11px;

  /* 尺度 */
  --rx-shell: 1280px;
  --rx-gutter: clamp(16px, 4vw, 40px);
  --rx-gap: clamp(16px, 2.4vw, 24px);
  --rx-sect: clamp(40px, 7vw, 88px);
  --rx-shear: 6deg;

  /* 材质 */
  --rx-shadow-soft:
    inset 0 1px 0 rgba(230, 237, 247, 0.03),
    0 24px 48px -40px rgba(0, 0, 0, 0.95);
  --rx-shadow-lift:
    inset 0 1px 0 rgba(34, 224, 200, 0.06),
    0 28px 56px -42px rgba(0, 0, 0, 0.95);
}

/* ---------- 3. 基底与中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--rx-void);
  background-image:
    radial-gradient(1100px 540px at 82% -10%, rgba(122, 77, 255, 0.15), transparent 62%),
    radial-gradient(780px 460px at -8% 4%, rgba(34, 224, 200, 0.09), transparent 60%),
    linear-gradient(rgba(36, 49, 79, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 49, 79, 0.28) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 96px 96px, 96px 96px;
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  color: var(--rx-ink);
  font-family: var(--rx-font-cn);
  font-size: var(--rx-fs-body);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
h1 { font-size: var(--rx-fs-h1); }
h2 { font-size: var(--rx-fs-h2); }
h3 { font-size: var(--rx-fs-h3); }
h4 { font-size: 17px; }

:focus-visible {
  outline: 2px solid var(--rx-cyan);
  outline-offset: 2px;
}

::selection {
  background: var(--rx-cyan);
  color: #04121A;
}

#main-content { display: block; }

/* ---------- 4. 布局骨架 ---------- */
.rx-shell {
  width: 100%;
  max-width: var(--rx-shell);
  margin-inline: auto;
  padding-inline: var(--rx-gutter);
}

.rx-section { padding-block: var(--rx-sect); }
.rx-section--tight { padding-block: clamp(24px, 4vw, 48px); }

.rx-grid {
  display: grid;
  gap: var(--rx-gap);
}
.rx-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rx-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rx-grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.rx-grid--aside { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 5. 跳过链接 ---------- */
.rx-skip {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 120;
  padding: 10px 16px;
  background: var(--rx-cyan);
  color: #04121A;
  font-family: var(--rx-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: top 160ms ease;
}
.rx-skip:focus { top: 10px; }

/* ---------- 6. 头部 · 紧凑命令栏 ---------- */
.rx-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(7, 11, 24, 0.97), rgba(7, 11, 24, 0.86));
  border-bottom: 1px solid var(--rx-stroke);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.rx-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rx-cyan-soft), transparent);
  pointer-events: none;
}

.rx-scrollbar {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: rgba(36, 49, 79, 0.55);
  overflow: hidden;
}
.rx-scrollbar__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--rx-cyan), var(--rx-violet));
  transition: width 120ms linear;
}

.rx-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 66px;
  padding-block: 11px;
}

.rx-brand { min-width: 0; }
.rx-brand__link {
  display: flex;
  align-items: center;
  gap: 12px;
}
.rx-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--rx-cyan);
  background: linear-gradient(135deg, var(--rx-cyan-fill), transparent 72%);
}
.rx-brand__mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--rx-cyan);
  clip-path: polygon(0 0, 100% 0, 100% 32%, 32% 32%, 32% 100%, 0 100%);
}
.rx-brand__text { display: block; min-width: 0; }
.rx-brand__line {
  display: block;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.rx-brand__sub {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--rx-mute);
  white-space: nowrap;
}

.rx-header__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.rx-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--rx-stroke);
  background: rgba(14, 21, 38, 0.72);
  color: var(--rx-mute);
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.rx-chip__dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background: var(--rx-cyan);
  box-shadow: 0 0 0 3px rgba(34, 224, 200, 0.16);
  animation: rx-pulse 2.4s ease-in-out infinite;
}
@keyframes rx-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.rx-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 12px;
  border: 1px solid var(--rx-stroke);
  color: var(--rx-ink);
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}
.rx-toggle:hover { border-color: var(--rx-cyan); color: var(--rx-cyan); }
.rx-toggle__bars { display: grid; gap: 4px; width: 18px; }
.rx-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--rx-cyan);
  transition: transform 200ms ease, opacity 200ms ease;
}
.rx-toggle[aria-expanded="true"] .rx-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.rx-toggle[aria-expanded="true"] .rx-toggle__bars span:nth-child(2) { opacity: 0; }
.rx-toggle[aria-expanded="true"] .rx-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 导航 */
.rx-nav { display: block; }
.rx-nav__list {
  display: flex;
  align-items: stretch;
  border-top: 1px solid rgba(36, 49, 79, 0.5);
  overflow-x: auto;
  scrollbar-width: thin;
}
.rx-nav__item { flex: 0 0 auto; display: flex; }
.rx-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-right: 1px solid rgba(36, 49, 79, 0.42);
  color: var(--rx-mute);
  font-size: var(--rx-fs-small);
  line-height: 1.2;
  transition: color 160ms ease, background 160ms ease;
}
.rx-nav__item:first-child .rx-nav__link { border-left: 1px solid rgba(36, 49, 79, 0.42); }
.rx-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: var(--rx-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 200ms ease;
}
.rx-nav__link:hover {
  color: var(--rx-ink);
  background: rgba(34, 224, 200, 0.05);
}
.rx-nav__link:hover::after { transform: scaleX(1); }
.rx-nav__link[aria-current="page"] {
  color: var(--rx-ink);
  background: var(--rx-cyan-fill);
}
.rx-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.rx-nav__index {
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  color: var(--rx-mute);
  transition: color 160ms ease;
}
.rx-nav__link:hover .rx-nav__index,
.rx-nav__link[aria-current="page"] .rx-nav__index { color: var(--rx-cyan); }
.rx-nav__label { white-space: nowrap; }

/* ---------- 7. 按钮 ---------- */
.rx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--rx-stroke);
  background: var(--rx-panel);
  color: var(--rx-ink);
  font-family: var(--rx-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-align: center;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}
.rx-btn:hover {
  border-color: var(--rx-cyan);
  color: var(--rx-cyan);
  background: var(--rx-cyan-fill);
}
.rx-btn--ghost { background: transparent; }
.rx-btn--primary {
  background: var(--rx-cyan);
  border-color: var(--rx-cyan);
  color: #04121A;
}
.rx-btn--primary:hover {
  background: transparent;
  color: var(--rx-cyan);
}
.rx-btn--violet:hover {
  border-color: var(--rx-violet);
  color: #C6B6FF;
  background: var(--rx-violet-fill);
}
.rx-btn--sm { padding: 8px 13px; font-size: var(--rx-fs-mono); }
.rx-btn.is-copied {
  border-color: var(--rx-cyan);
  color: var(--rx-cyan);
  background: var(--rx-cyan-fill);
  box-shadow: 0 0 0 1px var(--rx-cyan-soft) inset;
}

/* ---------- 8. 通用文本与数据 ---------- */
.rx-num {
  font-family: var(--rx-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.rx-prose { max-width: 68ch; }
.rx-prose p { color: var(--rx-ink); }
.rx-prose p + p { margin-top: 14px; }
.rx-prose h2, .rx-prose h3 { margin-top: 32px; }
.rx-prose h2 + p, .rx-prose h3 + p { margin-top: 12px; }
.rx-prose ul { margin-top: 14px; display: grid; gap: 8px; }
.rx-prose li {
  position: relative;
  padding-left: 20px;
  color: var(--rx-mute);
}
.rx-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 1px;
  background: var(--rx-cyan);
}

.rx-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--rx-mute);
}

.rx-link {
  color: var(--rx-cyan);
  border-bottom: 1px solid var(--rx-cyan-soft);
  transition: border-color 160ms ease, color 160ms ease;
}
.rx-link:hover { color: #7BF3E4; border-bottom-color: var(--rx-cyan); }

.rx-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rx-mute);
}
.rx-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--rx-cyan);
}

/* ---------- 9. 标签与状态 ---------- */
.rx-tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--rx-stroke);
  color: var(--rx-mute);
  font-family: var(--rx-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.rx-tag--cyan { color: var(--rx-cyan); border-color: var(--rx-cyan-soft); background: var(--rx-cyan-fill); }
.rx-tag--violet { color: #C6B6FF; border-color: rgba(122, 77, 255, 0.5); background: var(--rx-violet-fill); }
.rx-tag--amber { color: var(--rx-amber); border-color: rgba(255, 138, 52, 0.45); background: var(--rx-amber-fill); }

/* ---------- 10. 面包屑 ---------- */
.rx-breadcrumb { padding-block: 18px 0; }
.rx-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.1em;
  color: var(--rx-mute);
}
.rx-breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rx-stroke);
}
.rx-breadcrumb__link { transition: color 160ms ease; }
.rx-breadcrumb__link:hover { color: var(--rx-cyan); }
.rx-breadcrumb__current { color: var(--rx-ink); }

/* ---------- 11. 堆叠面板 ---------- */
.rx-panel {
  position: relative;
  background: var(--rx-panel);
  border: 1px solid var(--rx-stroke);
  padding: clamp(20px, 3.2vw, 40px);
  box-shadow: var(--rx-shadow-soft);
}
.rx-panel::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 40px;
  height: 2px;
  background: var(--rx-cyan);
}
.rx-panel--raise {
  background: var(--rx-raise);
  box-shadow: var(--rx-shadow-lift);
}
.rx-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rx-stroke);
}
.rx-panel__no {
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  color: var(--rx-cyan);
}
.rx-panel__label {
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rx-mute);
}
.rx-panel__title {
  margin-top: 22px;
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* ---------- 12. 左侧排名轴 ---------- */
.rx-rail {
  position: sticky;
  top: 132px;
  align-self: start;
  width: clamp(88px, 9vw, 112px);
  display: grid;
  gap: 1px;
  background: var(--rx-stroke);
  border: 1px solid var(--rx-stroke);
}
.rx-rail__row {
  display: grid;
  gap: 2px;
  padding: 10px 9px;
  background: var(--rx-panel);
  transition: background 160ms ease;
}
.rx-rail__row:hover { background: var(--rx-cyan-fill); }
.rx-rail__rank {
  font-family: var(--rx-font-mono);
  font-size: 16px;
  line-height: 1.1;
  color: var(--rx-cyan);
  font-variant-numeric: tabular-nums;
}
.rx-rail__abbr {
  font-family: var(--rx-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--rx-mute);
}
.rx-rail__delta {
  font-family: var(--rx-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  transition: transform 200ms ease;
}
.rx-rail__delta--up { color: var(--rx-cyan); }
.rx-rail__delta--down { color: var(--rx-amber); }
.rx-rail__delta--flat { color: var(--rx-mute); }
.rx-rail__row:hover .rx-rail__delta { transform: translateX(2px); }

/* ---------- 13. 图像容器（页面阶段放占位图） ---------- */
.rx-media {
  display: block;
  position: relative;
  border: 1px solid var(--rx-stroke);
  background: var(--rx-raise);
  overflow: hidden;
}
.rx-media__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(140deg, var(--rx-raise) 0%, rgba(122, 77, 255, 0.12) 55%, var(--rx-void) 100%);
  overflow: hidden;
}
.rx-media__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.68) contrast(1.06) brightness(0.84);
}
.rx-media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(7, 11, 24, 0.26) 0 1px,
    transparent 1px 4px
  );
  pointer-events: none;
}
.rx-media--tall .rx-media__frame { aspect-ratio: 4 / 5; }
.rx-media--square .rx-media__frame { aspect-ratio: 1 / 1; }
.rx-media--wide .rx-media__frame { aspect-ratio: 21 / 9; }
.rx-media__caption {
  padding: 10px 12px;
  border-top: 1px solid var(--rx-stroke);
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.06em;
  color: var(--rx-mute);
}

/* ---------- 14. 页脚 ---------- */
.rx-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--rx-stroke);
  background: linear-gradient(180deg, rgba(14, 21, 38, 0.92), rgba(7, 11, 24, 0.99));
}
.rx-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--rx-cyan), var(--rx-violet) 55%, transparent 92%);
}

.rx-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr) minmax(0, 1.2fr);
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 72px);
}

.rx-footer__brand { min-width: 0; }
.rx-footer__logo {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.rx-footer__desc {
  margin-top: 12px;
  max-width: 34ch;
  font-size: var(--rx-fs-small);
  line-height: 1.7;
  color: var(--rx-mute);
}
.rx-footer__brand .rx-btn { margin-top: 20px; }

.rx-footer__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.rx-footer__col { min-width: 0; }
.rx-footer__title {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rx-stroke);
  font-family: var(--rx-font-mono);
  font-size: var(--rx-fs-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rx-mute);
}
.rx-footer__list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}
.rx-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--rx-fs-small);
  line-height: 1.5;
  color: var(--rx-mute);
  transition: color 160ms ease;
}
.rx-footer__link::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 1px;
  background: var(--rx-stroke);
  transition: width 160ms ease, background 160ms ease;
}
.rx-footer__link:hover { color: var(--rx-ink); }
.rx-footer__link:hover::before { width: 20px; background: var(--rx-cyan); }

.rx-footer__contact { min-width: 0; }
.rx-footer__facts {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}
.rx-footer__fact {
  display: grid;
  gap: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--rx-mute);
  word-break: break-word;
}
.rx-footer__key {
  font-family: var(--rx-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rx-cyan);
}

.rx-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px;
  border-top: 1px solid var(--rx-stroke);
  font-family: var(--rx-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--rx-mute);
}
.rx-footer__legal { color: var(--rx-ink); }
.rx-footer__data { flex: 1 1 22rem; }
.rx-footer__copyright { color: var(--rx-mute); }

/* ---------- 15. 返回顶部 ---------- */
.rx-totop {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--rx-stroke);
  background: rgba(14, 21, 38, 0.92);
  color: var(--rx-mute);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms linear,
    border-color 160ms ease, color 160ms ease;
}
.rx-totop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.rx-totop:hover { color: var(--rx-cyan); border-color: var(--rx-cyan); }

/* ---------- 16. 显现动效 ---------- */
[data-reveal] { transition: opacity 420ms ease, transform 420ms ease; }
.rx-js [data-reveal] { opacity: 0; transform: translateY(16px); }
.rx-js [data-reveal].is-inview { opacity: 1; transform: none; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1100px) {
  .rx-header__meta { display: none; }
  .rx-footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .rx-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .rx-toggle { display: inline-flex; }
  .rx-brand__sub { display: none; }
  .rx-nav__list {
    flex-direction: column;
    border-top: 0;
    overflow: hidden;
    max-height: 0;
    transition: max-height 260ms ease;
  }
  .rx-nav[data-open] .rx-nav__list { max-height: 34rem; }
  .rx-nav__item { width: 100%; }
  .rx-nav__link {
    padding: 14px 4px;
    border-right: 0;
    border-left: 0;
    border-bottom: 1px solid rgba(36, 49, 79, 0.42);
  }
  .rx-nav__item:first-child .rx-nav__link { border-left: 0; }
  .rx-nav__link::after { left: 0; right: 0; }
  .rx-nav__link[aria-current="page"] { border-left: 2px solid var(--rx-cyan); }

  .rx-grid--2,
  .rx-grid--3,
  .rx-grid--split,
  .rx-grid--aside { grid-template-columns: minmax(0, 1fr); }

  .rx-rail {
    position: static;
    width: 100%;
    grid-auto-flow: column;
    grid-auto-columns: minmax(72px, 1fr);
    overflow-x: auto;
  }
  .rx-rail__row { padding: 9px 8px; }
}

@media (max-width: 700px) {
  .rx-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }
  .rx-footer__columns { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .rx-footer__base { flex-direction: column; align-items: flex-start; }
  .rx-footer__data { flex: 1 1 auto; }
}

@media (max-width: 420px) {
  .rx-btn { width: 100%; }
  .rx-toggle { width: auto; }
}

/* ---------- 18. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .rx-js [data-reveal] { opacity: 1; transform: none; }
  .rx-rail__row:hover .rx-rail__delta { transform: none; }
}