/* =========================================================
   百胜游戏站 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 01. 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, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

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

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

/* ---------- 02. 变量 ---------- */
:root {
  --ink: #06101F;
  --panel: #0B1B33;
  --grid: #16345C;
  --cyan: #00E5FF;
  --cyan-soft: #8CF8FF;
  --magenta: #FF2D8D;
  --gold: #FFC46B;
  --paper: #EAF6FF;
  --muted: #93A9C6;
  --deep: #040A14;

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

  --shell: 1240px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --border: 2px solid var(--grid);
  --hard-shadow: 8px 8px 0 rgba(4, 10, 20, 0.72);
  --slant: 10px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- 03. 基础排版与底色 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -8%, rgba(0, 229, 255, 0.10), transparent 62%),
    radial-gradient(760px 480px at 2% 2%, rgba(255, 45, 141, 0.07), transparent 58%),
    linear-gradient(rgba(22, 52, 92, 0.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 52, 92, 0.26) 1px, transparent 1px);
  background-size: auto, auto, 64px 64px, 64px 64px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

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

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

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  font-variant-ligatures: none;
}

/* ---------- 04. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 300;
  padding: 0.6rem 1.1rem;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  border: 2px solid var(--ink);
  transform: translateY(-220%);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 05. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(6, 16, 31, 0.97);
  border-bottom: 2px solid var(--grid);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.scroll-progress {
  height: 2px;
  background: rgba(22, 52, 92, 0.9);
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-soft) 62%, var(--magenta) 100%);
}

.site-header__inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  min-height: 68px;
  padding-block: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  transition: min-height 0.22s var(--ease);
}
.site-header[data-scrolled="true"] .site-header__inner { min-height: 58px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  padding-block: 0.3rem;
  color: var(--paper);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: linear-gradient(140deg, var(--cyan-soft), var(--cyan) 55%, #00b3cc);
  clip-path: polygon(9px 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
  box-shadow: 0 0 0 2px rgba(22, 52, 92, 0.95);
  transition: transform 0.2s var(--ease);
}
.brand:hover .brand__mark { transform: translateX(2px); }
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand__meta {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  white-space: nowrap;
}
.brand--footer .brand__mark { box-shadow: 0 0 0 2px rgba(255, 196, 107, 0.35); }

/* 中部通道状态 */
.chan-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex: 0 1 auto;
  min-width: 0;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(22, 52, 92, 0.95);
  background: rgba(11, 27, 51, 0.72);
  color: var(--muted);
  white-space: nowrap;
}
.chan-status__text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}
.status-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.16);
  animation: status-pulse 2.4s ease-in-out infinite;
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.16); opacity: 1; }
  50% { box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.04); opacity: 0.7; }
}

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  border: 2px solid var(--grid);
  background: var(--panel);
  color: var(--paper);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); background: rgba(0, 229, 255, 0.1); }
.nav-toggle__icon {
  display: grid;
  gap: 4px;
  width: 18px;
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--cyan);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* 导航 */
.site-nav { flex: 0 1 auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.15rem;
}
.site-nav__item { flex: 0 0 auto; }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.45rem 0.62rem;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--paper);
  white-space: nowrap;
  transition: color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.62rem;
  right: 0.62rem;
  bottom: 0.08rem;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.2s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--cyan-soft);
  box-shadow: inset 0 0 0 2px rgba(0, 229, 255, 0.38);
}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--cyan); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__foot { display: none; }

/* 状态带 */
.status-strip {
  height: 32px;
  overflow: hidden;
  border-top: 1px solid rgba(22, 52, 92, 0.85);
  background: linear-gradient(90deg, rgba(11, 27, 51, 0.96), rgba(6, 16, 31, 0.96));
  transition: height 0.22s var(--ease);
}
.site-header[data-scrolled="true"] .status-strip { height: 24px; }
.status-strip__inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.6rem);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}
.status-strip__label {
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
  color: var(--gold);
}
.status-strip__item {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}
.status-strip__item b { color: var(--cyan-soft); font-weight: 600; }
.status-strip__link {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s var(--ease);
}
.status-strip__link:hover { border-bottom-color: var(--cyan); }

/* ---------- 06. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--deep);
  border-top: 2px solid var(--grid);
  color: var(--paper);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.6;
}
.site-footer__inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 0.9fr) minmax(0, 1.3fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.footer-brand__note {
  max-width: 22em;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}
.footer-brand__chain {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.footer-nav__title,
.footer-contact__title {
  margin-bottom: 0.9rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(22, 52, 92, 0.9);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.footer-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.footer-nav__link {
  display: inline-block;
  padding-block: 0.1rem;
  font-size: 0.92rem;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}
.footer-nav__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  transform: translateX(3px);
}
.footer-nav--legal .footer-nav__link { color: var(--muted); }
.footer-nav--legal .footer-nav__link:hover { color: var(--cyan); }

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.footer-contact__list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}
.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.88rem;
  line-height: 1.6;
}
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding: 0.08rem 0.35rem;
  border: 1px solid rgba(22, 52, 92, 0.9);
}
.footer-contact__val { color: var(--paper); word-break: break-word; }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 0.1rem 0.42rem;
  border: 1px solid rgba(0, 229, 255, 0.42);
  transition: background 0.16s var(--ease), color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.footer-copy:hover { background: rgba(0, 229, 255, 0.16); }
.footer-copy[data-copied="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}
.footer-contact__hint {
  max-width: 24em;
  margin-top: 0.65rem;
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--muted);
}
.site-footer__bottom {
  border-top: 1px solid rgba(22, 52, 92, 0.85);
  background: #030711;
}
.site-footer__bottom-inner {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  padding-block: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1.4rem;
  font-size: 0.74rem;
  color: var(--muted);
}
.site-footer__copy { font-size: 0.74rem; }
.site-footer__icp {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.site-footer__base {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

/* ---------- 07. 通用按钮 ---------- */
.btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 46px;
  padding: 0.62rem 1.65rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  color: var(--paper);
  border: 0;
  cursor: pointer;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--panel);
  border: 2px solid var(--grid);
  clip-path: polygon(var(--slant) 0, 100% 0, calc(100% - var(--slant)) 100%, 0 100%);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn:hover { transform: translate(2px, -2px); }
.btn:hover::before { border-color: var(--cyan); }
.btn:active { transform: translate(0, 0); }
.btn--primary { color: var(--ink); }
.btn--primary::before {
  background: var(--cyan);
  border-color: var(--cyan);
}
.btn--primary:hover::before {
  background: var(--cyan-soft);
  border-color: var(--cyan-soft);
}
.btn--ghost { color: var(--cyan-soft); }
.btn--ghost::before {
  background: rgba(11, 27, 51, 0.85);
  border-color: var(--cyan);
}
.btn--ghost:hover::before { background: rgba(0, 229, 255, 0.16); }
.btn--sm {
  min-height: 38px;
  padding: 0.34rem 1.1rem;
  font-size: 0.84rem;
}

/* ---------- 08. 面包屑与正文容器 ---------- */
.breadcrumbs {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
  padding-block: 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}
.breadcrumbs__item { display: inline-flex; align-items: center; gap: 0.45rem; }
.breadcrumbs__item::after { content: "/"; color: var(--grid); }
.breadcrumbs__item:last-child::after { content: none; }
.breadcrumbs__link {
  color: var(--cyan);
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s var(--ease);
}
.breadcrumbs__link:hover { border-bottom-color: var(--cyan); }
.breadcrumbs__link[aria-current="page"] { color: var(--paper); }

.page-shell {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
}

/* ---------- 09. 编号章节 ---------- */
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section__head {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}
.section__index {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  border-left: 4px solid var(--cyan);
  padding-left: 0.8rem;
}
.section__lead {
  max-width: 34em;
  color: var(--muted);
  line-height: 1.8;
}

/* ---------- 10. 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.75rem);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.panel {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.6rem);
  background: var(--panel);
  border: 2px solid var(--grid);
  box-shadow: var(--hard-shadow);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}
.panel:hover {
  border-color: var(--cyan);
  box-shadow: 4px 4px 0 rgba(0, 229, 255, 0.3);
  transform: translate(4px, 4px);
}
.panel--step { margin-block-start: 24px; }

/* ---------- 11. 图片容器（页面阶段放置占位与内容） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-image:
    radial-gradient(420px 220px at 80% 0%, rgba(0, 229, 255, 0.16), transparent 70%),
    linear-gradient(160deg, #0B1B33, #06101F 62%);
  border: 2px solid rgba(22, 52, 92, 0.95);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.07) 1px, transparent 1px);
  background-size: 22px 22px;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  border: 1px solid rgba(255, 196, 107, 0.38);
}
.media-frame__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 3;
  max-width: 100%;
  padding: 0.35rem 0.75rem;
  background: rgba(4, 10, 20, 0.88);
  border-top: 1px solid rgba(255, 196, 107, 0.38);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 12. 显现动画协议 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .js-reveal [data-reveal] {
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }
  .js-reveal [data-reveal]:not(.is-visible) {
    opacity: 0;
    transform: translateY(12px);
  }
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1199px) {
  .chan-status { display: none; }
}

@media (max-width: 1024px) {
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 920px) {
  html.nav-open { overflow: hidden; }

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

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 95;
    max-height: 78vh;
    overflow-y: auto;
    padding: 1.1rem var(--gutter) calc(1.5rem + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(180deg, rgba(11, 27, 51, 0.99), rgba(4, 10, 20, 0.99));
    border-top: 2px solid var(--cyan);
    box-shadow: 0 -10px 0 rgba(0, 229, 255, 0.12);
    transform: translateY(112%);
    visibility: hidden;
    transition: transform 0.3s var(--ease), visibility 0s linear 0.3s;
  }
  .site-nav[data-open] {
    transform: translateY(0);
    visibility: visible;
    transition: transform 0.3s var(--ease), visibility 0s linear 0s;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 0.15rem;
  }
  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.82rem 0.75rem;
    font-size: 1.02rem;
    border-bottom: 1px solid rgba(22, 52, 92, 0.85);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover,
  .site-nav__link:focus-visible { box-shadow: none; background: rgba(0, 229, 255, 0.08); }
  .site-nav__link[aria-current="page"] {
    background: rgba(0, 229, 255, 0.1);
    box-shadow: inset 3px 0 0 var(--cyan);
  }
  .site-nav__foot {
    display: block;
    margin-top: 1rem;
    padding-top: 0.8rem;
    border-top: 1px dashed rgba(22, 52, 92, 0.95);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.14em;
    color: var(--muted);
  }

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

@media (max-width: 720px) {
  .panel--step { margin-block-start: 0; }
  .section__title { border-left-width: 3px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header__inner { min-height: 60px; }
  .brand__mark { width: 40px; height: 40px; font-size: 0.82rem; }
  .brand__name { font-size: 0.98rem; }
  .brand__meta { font-size: 0.6rem; }
  .status-strip__item:nth-child(4) { display: none; }
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .site-footer__icp { margin-left: 0; }
  .btn { width: 100%; }
  .footer-contact .btn { width: auto; }
}

@media (max-width: 380px) {
  .status-strip__item:nth-child(3) { display: none; }
  .nav-toggle__label { display: none; }
}

/* ---------- 14. 减少动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }
  .status-dot { animation: none; }
  .panel:hover,
  .btn:hover,
  .footer-nav__link:hover { transform: none; }
}