/* =========================================================
   优乐电子 · 共享 Site Kit
   1. 令牌  2. Reset  3. 基础排版  4. 布局与通用组件
   5. 页头  6. 页脚  7. 动效与可访问性  8. 响应式
   ========================================================= */

/* ---------- 1. 令牌 ---------- */
:root {
  --ink: #081826;
  --ink-2: #102B40;
  --cream: #F2E7D5;
  --brown: #211A16;
  --cyan: #39D1DF;
  --orange: #F1783C;
  --mint: #94D8B7;
  --amber: #E9B24B;
  --slate: #4A667C;
  --mist: #DCE7EA;

  --mist-soft: rgba(220, 231, 234, 0.82);
  --mist-dim: rgba(220, 231, 234, 0.60);
  --mist-faint: rgba(220, 231, 234, 0.45);
  --hair: rgba(74, 102, 124, 0.55);
  --hair-soft: rgba(74, 102, 124, 0.28);

  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --maxw: 1240px;
  --pad: clamp(1.15rem, 3.4vw, 2.75rem);
  --section-y: clamp(2.5rem, 6vw, 5rem);
  --header-h: 7.5rem;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

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

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

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

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

a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

a:hover { color: var(--orange); }

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

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

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(74, 102, 124, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 102, 124, 0.10) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  color: var(--mist-soft);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--cream);
}

h1 { font-size: clamp(2.25rem, 5.4vw, 4.5rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.5rem); }
h4 { font-size: 1.0625rem; letter-spacing: 0.01em; }

strong { color: var(--cream); }

.mono {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
  letter-spacing: 0.04em;
}

/* ---------- 4. 布局与通用组件 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.container--narrow { max-width: 840px; }

.section { padding-block: var(--section-y); }

.section-label {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.section-label::before {
  content: "";
  width: 30px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 232px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 184px), 1fr)); }

/* 面板 */
.panel {
  position: relative;
  padding: clamp(1.15rem, 2.6vw, 2rem);
  background: rgba(16, 43, 64, 0.62);
  border: 1px solid var(--hair);
}

.panel--ink {
  background: var(--ink-2);
  border-color: var(--hair-soft);
}

.panel--cream {
  background: var(--cream);
  border-color: rgba(33, 26, 22, 0.28);
  color: rgba(33, 26, 22, 0.86);
}

.panel--cream h2,
.panel--cream h3,
.panel--cream h4 { color: var(--brown); }

.panel--cream a { color: #0E4D5A; }
.panel--cream a:hover { color: #A03B0E; }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.55rem;
  border: 1px solid var(--hair);
  background: transparent;
  color: var(--mist-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  line-height: 1.4;
  white-space: nowrap;
}

.tag--mint { background: var(--mint); border-color: var(--mint); color: var(--ink); }
.tag--amber { background: var(--amber); border-color: var(--amber); color: var(--brown); }
.tag--cyan { background: transparent; border-color: var(--cyan); color: var(--cyan); }
.tag--ink { background: var(--ink-2); border-color: var(--hair); color: var(--mist-soft); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.btn--ghost {
  border-color: var(--hair);
  color: var(--cream);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--cream {
  background: var(--cream);
  border-color: var(--brown);
  color: var(--brown);
}

.btn--cream:hover,
.btn--cream:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--brown);
}

/* 面包屑 */
.breadcrumbs { margin-top: 1.5rem; }

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--mist-dim);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--slate);
}

.breadcrumbs a {
  color: var(--mist-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.breadcrumbs a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.breadcrumbs [aria-current="page"] { color: var(--orange); }

/* 正文长文 */
.prose { max-width: 72ch; }

.prose > * + * { margin-top: 1.05em; }

.prose h2 { margin-top: 2.1em; font-size: clamp(1.35rem, 2.4vw, 1.85rem); }
.prose h3 { margin-top: 1.7em; }

.prose ul, .prose ol {
  display: grid;
  gap: 0.45em;
  padding-left: 1.4em;
  list-style: square;
}

.prose a { text-decoration-thickness: 1px; }

.prose code {
  padding: 0.1em 0.36em;
  background: rgba(57, 209, 223, 0.14);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.panel--cream .prose code { background: rgba(33, 26, 22, 0.1); color: var(--brown); }
.panel--cream .prose strong { color: var(--brown); }

/* 图片框景容器 */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--hair);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(158deg, rgba(57, 209, 223, 0.16), rgba(8, 24, 38, 0.92) 58%),
    repeating-linear-gradient(0deg, rgba(74, 102, 124, 0.22) 0 1px, transparent 1px 24px);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px dashed rgba(220, 231, 234, 0.2);
  pointer-events: none;
  z-index: 1;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__index {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  padding: 0.32rem 0.55rem;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  max-width: 100%;
  padding: 0.42rem 0.75rem;
  border-top: 1px solid var(--hair);
  background: rgba(8, 24, 38, 0.88);
  color: var(--mist-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

/* 分段切换 */
.tabs { border-top: 1px solid var(--hair); }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--hair);
}

.tabs__tab {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--hair);
  border-radius: 0;
  background: transparent;
  color: var(--mist-soft);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tabs__tab:hover { border-color: var(--cyan); color: var(--cyan); }

.tabs__tab[aria-selected="true"] {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--ink);
  font-weight: 700;
}

.tabs__panel { padding-block: 1.35rem; }
.tabs__panel[hidden] { display: none; }

/* ---------- 5. 页头 ---------- */
.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  padding: 0.7rem 1.05rem;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-190%);
  transition: transform 0.18s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--ink);
  outline-color: var(--cream);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  border-bottom: 1px solid var(--hair);
  color: var(--mist-soft);
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(74, 102, 124, 0.3);
  overflow: hidden;
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--orange) 100%);
  transition: transform 0.12s linear;
}

.header-utility {
  background: var(--ink-2);
  border-bottom: 1px solid var(--hair-soft);
}

.header-utility__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1.25rem;
  padding-block: 0.45rem;
}

.utility-line {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--mist-dim);
}

.utility-key {
  flex: none;
  padding: 0.15rem 0.4rem;
  background: var(--cyan);
  color: var(--ink);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  line-height: 1.4;
}

.utility-text { color: var(--mist-dim); }

.utility-meta {
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  color: var(--mist-faint);
  white-space: nowrap;
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(0.75rem, 2vw, 2rem);
  padding-block: 0.85rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  min-width: 0;
}

.brand-index {
  flex: none;
  padding: 0.4rem 0.45rem;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
}

.brand-link {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  min-width: 0;
  text-decoration: none;
  color: var(--cream);
}

.brand-link:hover { color: var(--cream); }

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: 0.03em;
  line-height: 1.05;
}

.brand-descriptor {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  color: var(--mist-faint);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--hair);
  border-radius: 0;
  background: transparent;
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.6vw, 1.75rem);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.3vw, 1.4rem);
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.4rem 0.1rem;
  color: var(--mist-soft);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.nav-link:hover { color: var(--cyan); }
.nav-link:hover::after { transform: scaleX(1); }

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border: 1px solid var(--orange);
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, var(--ink) 0%, #061320 100%);
  color: var(--mist-soft);
}

.footer-strip {
  border-bottom: 1px solid var(--hair-soft);
  background: var(--ink-2);
  color: var(--mist-faint);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
}

.footer-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  padding-block: 0.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.75fr) minmax(0, 1.1fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-block: clamp(2.25rem, 5vw, 3.75rem);
}

.footer-brand-name {
  margin-bottom: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1.1;
  color: var(--cream);
}

.footer-summary {
  max-width: 38ch;
  margin-bottom: 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mist-dim);
}

.footer-coord {
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--mist-faint);
}

.footer-col-title {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-links {
  display: grid;
  gap: 0.55rem;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  color: var(--mist-soft);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-links a::before {
  content: "›";
  color: var(--slate);
  font-family: var(--font-mono);
  transition: color 0.2s ease;
}

.footer-links a:hover { color: var(--cyan); border-bottom-color: rgba(57, 209, 223, 0.55); }
.footer-links a:hover::before { color: var(--cyan); }

.contact-list {
  display: grid;
  gap: 0.85rem;
  font-style: normal;
}

.contact-item { display: grid; gap: 0.12rem; }

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  color: var(--mist-faint);
}

.contact-value {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--cream);
  overflow-wrap: anywhere;
}

.footer-baseline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.2rem 1.9rem;
  border-top: 1px solid var(--hair-soft);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.35rem;
  font-size: 0.8125rem;
}

.footer-legal a {
  color: var(--mist-dim);
  text-decoration: none;
  border-bottom: 1px solid rgba(74, 102, 124, 0.6);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-legal a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-copy {
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--mist-faint);
}

/* ---------- 7. 动效与可访问性 ---------- */
[data-reveal] { transition: opacity 0.5s ease, transform 0.5s ease; }
[data-reveal].reveal-pending { opacity: 0; transform: translateY(14px); }
[data-reveal].is-revealed { opacity: 1; transform: none; }

@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;
  }

  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .scroll-meter__bar { transition: none !important; }
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1000px) {
  :root { --header-h: 6.5rem; }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.35rem var(--pad) 1.25rem;
    border-top: 1px solid var(--hair);
    border-bottom: 1px solid var(--hair);
    background: var(--ink-2);
    max-height: calc(100vh - 5rem);
    overflow-y: auto;
    box-shadow: 0 22px 44px rgba(3, 10, 16, 0.6);
  }

  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item + .nav-item { border-top: 1px solid var(--hair-soft); }

  .nav-link {
    padding: 0.85rem 0.9rem;
    font-size: 1rem;
    border-left: 2px solid transparent;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] { border-left-color: var(--orange); }

  .nav-cta {
    margin-top: 1rem;
    padding-block: 0.85rem;
    font-size: 0.8125rem;
  }
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .header-utility__inner { justify-content: flex-start; }
  .utility-meta { display: none; }
  .utility-text { font-size: 0.625rem; letter-spacing: 0.06em; }
  .brand-index { display: none; }
  .brand-name { font-size: 1.2rem; }
  .brand-descriptor { font-size: 0.5625rem; letter-spacing: 0.1em; }
  .nav-toggle-label { display: none; }
  .nav-toggle { padding: 0.65rem 0.6rem; }
}

@media (max-width: 620px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-baseline { flex-direction: column; align-items: flex-start; }
  .footer-summary { font-size: 0.9rem; }
  .tabs__list { gap: 0.4rem; }
  .tabs__tab { padding: 0.45rem 0.7rem; font-size: 0.6875rem; }
}

@media (max-width: 420px) {
  .brand-descriptor { display: none; }
  .utility-text { font-size: 0.5625rem; }
}