/* =========================================================
   日博真人娱乐 — 共享站点样式 /assets/site.css
   深海蓝暗场 · 霓虹青骨架 · 珊瑚橙脉冲 · 锐利直角与精密网格
   ========================================================= */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, dt, ul, ol {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

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

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  --rb-abyss: #03111f;
  --rb-navy: #062036;
  --rb-navy-2: #0a2c47;
  --rb-slate: #123a58;

  --rb-text: #e8f5ff;
  --rb-text-dim: #9dbdd4;
  --rb-text-faint: rgba(157, 189, 212, 0.55);

  --rb-cyan: #25f4d8;
  --rb-cyan-deep: #0e9c8c;
  --rb-coral: #ff5f3d;
  --rb-coral-deep: #c93a1c;

  --rb-line: rgba(37, 244, 216, 0.26);
  --rb-line-soft: rgba(157, 189, 212, 0.16);
  --rb-line-faint: rgba(157, 189, 212, 0.09);

  --rb-container: 1220px;
  --rb-gutter: clamp(18px, 4.5vw, 52px);

  --rb-font-display: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --rb-font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --rb-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rb-ease: cubic-bezier(0.22, 0.72, 0.24, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--rb-abyss);
  background-image:
    radial-gradient(circle at 84% -8%, rgba(37, 244, 216, 0.13), transparent 46%),
    radial-gradient(circle at 4% 6%, rgba(255, 95, 61, 0.10), transparent 40%);
  background-repeat: no-repeat;
  color: var(--rb-text);
  font-family: var(--rb-font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.012em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--rb-font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.005em;
}

p { text-wrap: pretty; }

::selection {
  background: var(--rb-cyan);
  color: var(--rb-abyss);
}

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

/* ---------- 4. 跳转链接 ---------- */
.rb-skip {
  position: absolute;
  top: -72px;
  left: 14px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--rb-cyan);
  color: var(--rb-abyss);
  font-family: var(--rb-font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top 0.18s var(--rb-ease);
}

.rb-skip:focus {
  top: 12px;
}

/* ---------- 5. 容器与分区 ---------- */
.rb-container {
  width: 100%;
  max-width: var(--rb-container);
  margin-inline: auto;
  padding-inline: var(--rb-gutter);
}

.rb-section {
  position: relative;
  padding: clamp(44px, 7vw, 96px) 0;
}

.rb-section--tight {
  padding-top: clamp(22px, 3.6vw, 46px);
}

.rb-section--alt {
  background: linear-gradient(180deg, rgba(10, 44, 71, 0.55), rgba(10, 44, 71, 0));
  border-top: 1px solid var(--rb-line-soft);
  border-bottom: 1px solid var(--rb-line-soft);
}

.rb-rule {
  height: 1px;
  background: var(--rb-line-soft);
}

/* ---------- 6. 排版件 ---------- */
.rb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--rb-coral);
}

.rb-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--rb-coral);
}

.rb-display {
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.005em;
}

.rb-h2 { font-size: clamp(24px, 3.4vw, 38px); }
.rb-h3 { font-size: clamp(18px, 2.2vw, 22px); }

.rb-lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.85;
  color: var(--rb-text-dim);
}

.rb-note-vertical {
  writing-mode: vertical-rl;
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--rb-text-faint);
}

.rb-text-cyan { color: var(--rb-cyan); }
.rb-text-coral { color: var(--rb-coral); }

/* ---------- 7. 按钮 ---------- */
.rb-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid var(--rb-cyan);
  background: transparent;
  color: var(--rb-cyan);
  font-family: var(--rb-font-display);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 0;
  transition: background 0.2s var(--rb-ease), color 0.2s var(--rb-ease), transform 0.2s var(--rb-ease), border-color 0.2s var(--rb-ease);
}

.rb-btn:hover {
  background: var(--rb-cyan);
  color: var(--rb-abyss);
  transform: translateX(2px);
}

.rb-btn--solid {
  background: var(--rb-cyan);
  border-color: var(--rb-cyan);
  color: var(--rb-abyss);
}

.rb-btn--solid:hover {
  background: var(--rb-text);
  border-color: var(--rb-text);
  color: var(--rb-abyss);
}

.rb-btn--coral {
  background: var(--rb-coral);
  border-color: var(--rb-coral);
  color: #ffffff;
}

.rb-btn--coral:hover {
  background: #ffffff;
  border-color: #ffffff;
  color: var(--rb-coral-deep);
}

.rb-btn--ghost {
  border-color: var(--rb-line-soft);
  color: var(--rb-text-dim);
}

.rb-btn--ghost:hover {
  background: transparent;
  border-color: var(--rb-cyan);
  color: var(--rb-cyan);
}

.rb-btn__arrow {
  font-family: var(--rb-font-mono);
  font-size: 13px;
}

/* ---------- 8. 面包屑 ---------- */
.rb-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

.rb-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--rb-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rb-text-dim);
}

.rb-crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.rb-crumbs__item::after {
  content: "/";
  color: rgba(157, 189, 212, 0.35);
}

.rb-crumbs__item:last-child::after { content: none; }

.rb-crumbs__link:hover { color: var(--rb-cyan); }

.rb-crumbs [aria-current="page"] { color: var(--rb-cyan); }

/* ---------- 9. 页头 ---------- */
.rb-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(6, 32, 54, 0.97), rgba(3, 17, 31, 0.95));
  border-bottom: 1px solid var(--rb-line-soft);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.rb-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(37, 244, 216, 0.06) 0 1px, transparent 1px 88px);
  opacity: 0.7;
}

.rb-header__frame {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--rb-container);
  margin-inline: auto;
  padding: 16px var(--rb-gutter) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rb-header__top {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.rb-header__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rb-text-dim);
}

.rb-header__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--rb-cyan);
  flex: none;
}

.rb-header__tools {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 16px;
}

.rb-header__status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rb-cyan);
}

.rb-header__dot {
  width: 7px;
  height: 7px;
  flex: none;
  background: var(--rb-coral);
  animation: rb-pulse 1.8s ease-in-out infinite;
}

@keyframes rb-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

/* 品牌报头 */
.rb-brand {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 14px;
}

.rb-brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: none;
  background: var(--rb-cyan);
  color: var(--rb-abyss);
  font-family: var(--rb-font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  border-radius: 0;
  transition: background 0.2s var(--rb-ease);
}

.rb-brand:hover .rb-brand__mark { background: var(--rb-coral); }

.rb-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.1;
}

.rb-brand__name {
  font-family: var(--rb-font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.rb-brand__sub {
  font-family: var(--rb-font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--rb-text-dim);
}

/* 移动菜单按钮 */
.rb-navtoggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--rb-line);
  color: var(--rb-cyan);
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.rb-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.rb-navtoggle__bars > span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--rb-ease);
}

.rb-header[data-open] .rb-navtoggle__bars > span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.rb-header[data-open] .rb-navtoggle__bars > span:nth-child(2) { opacity: 0; }
.rb-header[data-open] .rb-navtoggle__bars > span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 居中刊头导航 */
.rb-nav {
  width: 100%;
  margin-top: 14px;
  border-top: 1px solid var(--rb-line-soft);
}

.rb-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.rb-nav__item {
  position: relative;
}

.rb-nav__item + .rb-nav__item {
  border-left: 1px solid var(--rb-line-soft);
}

.rb-nav__link {
  position: relative;
  display: block;
  padding: 13px clamp(12px, 2vw, 26px);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--rb-text-dim);
  transition: color 0.2s var(--rb-ease), background 0.2s var(--rb-ease);
}

.rb-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--rb-cyan);
  transform: translateX(-50%);
  transition: width 0.24s var(--rb-ease);
}

.rb-nav__link:hover,
.rb-nav__link:focus-visible {
  color: var(--rb-text);
}

.rb-nav__link:hover::after { width: 100%; }

.rb-nav__link[aria-current="page"] {
  background: var(--rb-cyan);
  color: var(--rb-abyss);
}

.rb-nav__link[aria-current="page"]::after {
  width: 100%;
  background: var(--rb-coral);
}

.rb-nav__note {
  display: none;
  padding: 12px 4px 14px;
  font-family: var(--rb-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rb-text-faint);
  text-align: center;
}

/* 阅读进度 */
.rb-progress {
  position: relative;
  height: 2px;
  background: rgba(157, 189, 212, 0.12);
  overflow: hidden;
}

.rb-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--rb-cyan), var(--rb-coral));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 10. 页脚 ---------- */
.rb-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  background: linear-gradient(180deg, rgba(6, 32, 54, 0.62), var(--rb-abyss) 62%);
  border-top: 1px solid var(--rb-line);
}

.rb-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(38%, 420px);
  height: 3px;
  background: var(--rb-coral);
}

.rb-footer__inner {
  width: 100%;
  max-width: var(--rb-container);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--rb-gutter) clamp(18px, 3vw, 28px);
}

.rb-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
  gap: clamp(26px, 4vw, 56px);
}

.rb-footer__col { min-width: 0; }

.rb-footer__brand {
  font-family: var(--rb-font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.rb-footer__tagline {
  margin-top: 10px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rb-text-dim);
}

.rb-footer__nav { margin-top: 22px; }

.rb-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.rb-footer__nav a {
  font-size: 14px;
  color: var(--rb-cyan);
  border-bottom: 1px solid rgba(37, 244, 216, 0.35);
  padding-bottom: 2px;
  transition: color 0.2s var(--rb-ease), border-color 0.2s var(--rb-ease);
}

.rb-footer__nav a:hover {
  color: var(--rb-text);
  border-bottom-color: var(--rb-text);
}

.rb-footer__title {
  font-family: var(--rb-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--rb-text-dim);
}

.rb-footer__title::after {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin-top: 10px;
  background: var(--rb-cyan);
}

.rb-footer__list {
  margin-top: 18px;
  display: grid;
  gap: 10px;
  font-size: 14px;
}

.rb-footer__list--meta { gap: 12px; }

.rb-footer__row {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.rb-footer__key {
  flex: none;
  min-width: 46px;
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--rb-text-faint);
}

.rb-footer__val {
  color: var(--rb-text);
  word-break: break-word;
}

.rb-footer__link {
  color: var(--rb-text-dim);
  transition: color 0.2s var(--rb-ease);
}

.rb-footer__link:hover { color: var(--rb-cyan); }

.rb-footer__note {
  margin-top: 18px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--rb-text-faint);
}

.rb-footer__base {
  margin-top: clamp(30px, 5vw, 54px);
  padding-top: 18px;
  border-top: 1px solid var(--rb-line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
  font-family: var(--rb-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--rb-text-faint);
}

/* ---------- 11. 网格与分栏 ---------- */
.rb-grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
}

.rb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rb-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.rb-split {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
  align-items: start;
}

/* ---------- 12. 面板 ---------- */
.rb-panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid var(--rb-line-soft);
  border-radius: 0;
  background: linear-gradient(160deg, rgba(10, 44, 71, 0.75), rgba(3, 17, 31, 0.55));
  transition: border-color 0.22s var(--rb-ease), transform 0.22s var(--rb-ease);
}

.rb-panel:hover {
  border-color: var(--rb-line);
  transform: translateY(-2px);
}

.rb-panel--accent { border-color: rgba(37, 244, 216, 0.42); }
.rb-panel--coral { border-color: rgba(255, 95, 61, 0.42); }

.rb-panel__index {
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--rb-cyan);
}

.rb-panel--coral .rb-panel__index { color: var(--rb-coral); }

.rb-panel__title {
  margin-top: 10px;
  font-size: clamp(17px, 2vw, 21px);
}

.rb-panel__text {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--rb-text-dim);
}

/* ---------- 13. 图片容器 ---------- */
.rb-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--rb-line-soft);
  background: linear-gradient(135deg, rgba(10, 44, 71, 0.9), rgba(3, 17, 31, 0.9));
  overflow: hidden;
}

.rb-figure__img {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.rb-figure__img > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.rb-figure__img::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(3, 17, 31, 0.6), rgba(3, 17, 31, 0) 56%, rgba(255, 95, 61, 0.2));
}

.rb-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--rb-line-soft);
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rb-text-dim);
}

.rb-figure--wide .rb-figure__img { aspect-ratio: 21 / 9; }
.rb-figure--tall .rb-figure__img { aspect-ratio: 3 / 4; }
.rb-figure--square .rb-figure__img { aspect-ratio: 1 / 1; }

/* ---------- 14. 时间轴 ---------- */
.rb-timeline {
  position: relative;
  padding-left: 34px;
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.rb-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--rb-cyan), rgba(37, 244, 216, 0.05));
}

.rb-timeline__item { position: relative; }

.rb-timeline__item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--rb-abyss);
  border: 2px solid var(--rb-cyan);
}

.rb-timeline__item--hot::before { border-color: var(--rb-coral); }

.rb-timeline__time {
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--rb-text-faint);
}

.rb-timeline__title {
  margin-top: 6px;
  font-size: clamp(16px, 1.9vw, 19px);
}

.rb-timeline__text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rb-text-dim);
}

/* ---------- 15. 步骤 / 技能树 ---------- */
.rb-steps {
  display: grid;
  gap: 1px;
  background: var(--rb-line-soft);
  border: 1px solid var(--rb-line-soft);
}

.rb-step {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--rb-abyss);
}

.rb-step__num {
  font-family: var(--rb-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--rb-coral);
}

.rb-step__title {
  margin-top: 10px;
  font-size: 17px;
}

/* ---------- 16. 标签 ---------- */
.rb-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--rb-line);
  font-family: var(--rb-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rb-cyan);
}

.rb-chip--coral {
  border-color: rgba(255, 95, 61, 0.5);
  color: var(--rb-coral);
}

/* ---------- 17. 分段切换 ---------- */
.rb-tabs { position: relative; }

.rb-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--rb-line-soft);
}

.rb-tab {
  padding: 12px clamp(14px, 2.2vw, 26px);
  font-family: var(--rb-font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--rb-text-dim);
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 0;
  transition: color 0.2s var(--rb-ease), background 0.2s var(--rb-ease);
}

.rb-tab:not([aria-selected="true"]):hover {
  background: rgba(37, 244, 216, 0.07);
  color: var(--rb-text);
}

.rb-tab[aria-selected="true"] {
  background: var(--rb-cyan);
  color: var(--rb-abyss);
}

.rb-tabpanel {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.rb-tabpanel[hidden] { display: none; }

/* ---------- 18. 数据条 ---------- */
.rb-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--rb-line-soft);
  border: 1px solid var(--rb-line-soft);
}

.rb-stat {
  padding: 20px;
  background: var(--rb-abyss);
}

.rb-stat__value {
  font-family: var(--rb-font-mono);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.01em;
  color: var(--rb-cyan);
}

.rb-stat__label {
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--rb-text-dim);
}

/* ---------- 19. 横向滚动条 ---------- */
.rb-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(238px, 1fr);
  gap: 1px;
  background: var(--rb-line-soft);
  border: 1px solid var(--rb-line-soft);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.rb-strip__item {
  padding: 18px 20px;
  background: var(--rb-navy);
  scroll-snap-align: start;
}

/* ---------- 20. 滚动显现 ---------- */
.rb-js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--rb-ease), transform 0.7s var(--rb-ease);
}

.rb-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .rb-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rb-footer__grid { grid-template-columns: 1.3fr 1fr; }
  .rb-footer__col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .rb-header__kicker { display: none; }
  .rb-header__top {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
  .rb-brand { justify-self: start; }
  .rb-brand__sub { display: none; }
  .rb-header__status { display: none; }
  .rb-navtoggle { display: inline-flex; }

  .rb-nav {
    display: none;
    margin-top: 14px;
    border-top: 1px solid var(--rb-line);
  }

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

  .rb-nav__list {
    flex-direction: column;
    justify-content: flex-start;
  }

  .rb-nav__item + .rb-nav__item {
    border-left: 0;
    border-top: 1px solid var(--rb-line-soft);
  }

  .rb-nav__link {
    padding: 15px 4px;
    font-size: 16px;
  }

  .rb-nav__link::after {
    left: 0;
    transform: none;
  }

  .rb-nav__note { display: block; }

  .rb-split { grid-template-columns: minmax(0, 1fr); }
  .rb-grid--2,
  .rb-grid--3 { grid-template-columns: minmax(0, 1fr); }
  .rb-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .rb-footer__col:last-child { grid-column: auto; }
}

@media (max-width: 640px) {
  .rb-grid--4 { grid-template-columns: minmax(0, 1fr); }
  .rb-tabs__bar {
    overflow-x: auto;
    flex-wrap: nowrap;
  }
  .rb-tab { flex: none; }
  .rb-strip { grid-auto-columns: minmax(200px, 82%); }
  .rb-footer__base { justify-content: flex-start; }
}

/* ---------- 22. 无障碍与动效偏好 ---------- */
@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;
  }

  .rb-js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}