/* ==========================================================================
   浩瀚体育 · 共享站点样式 /assets/site.css
   框架：左侧索引轨 + 顶部细线状态条 + 连续画布
   ========================================================================== */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--topbar-h, 46px) + 16px);
}

html:focus-within { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  padding-left: var(--rail-w);
  padding-top: var(--topbar-h);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--mist-100);
  background-color: var(--abyss-950);
  background-image:
    radial-gradient(115% 68% at 88% -10%, rgba(51, 230, 209, 0.13), transparent 62%),
    radial-gradient(90% 60% at 4% 106%, rgba(255, 107, 53, 0.10), transparent 68%),
    repeating-linear-gradient(to right, var(--line-soft) 0 1px, transparent 1px 96px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
dl, dd, p, figure { margin: 0; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.04em;
}

::selection { background: rgba(51, 230, 209, 0.28); color: var(--mist-100); }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

/* ==========================================================================
   变量
   ========================================================================== */
:root {
  --abyss-950: #04111F;
  --deep-900: #071D32;
  --trench-800: #0B2B47;
  --cyan-400: #33E6D1;
  --cyan-200: #9BF8EE;
  --lava-500: #FF6B35;
  --ember-600: #D84A1B;
  --mist-100: #E9F5F8;
  --steel-400: #6F8EA3;
  --gold-400: #F5C451;

  --line: rgba(51, 230, 209, 0.16);
  --line-soft: rgba(51, 230, 209, 0.08);
  --line-strong: rgba(51, 230, 209, 0.38);

  --rail-w: 240px;
  --topbar-h: 46px;
  --topbar-h-m: 58px;
  --gutter: clamp(18px, 4.4vw, 72px);

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

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ==========================================================================
   可访问性：跳转链接
   ========================================================================== */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--abyss-950);
  background: var(--cyan-400);
  border: 1px solid var(--cyan-400);
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 2px;
}

/* ==========================================================================
   头部：左侧索引轨 + 顶部状态条
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(196deg, rgba(11, 43, 71, 0.94) 0%, rgba(7, 29, 50, 0.96) 44%, rgba(4, 17, 31, 0.99) 100%);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 38%;
  pointer-events: none;
  background: linear-gradient(162deg, transparent 52%, rgba(51, 230, 209, 0.10) 100%);
}

/* 顶部细线状态条 */
.header-top {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  z-index: 81;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 28px);
  padding: 0 clamp(14px, 2.4vw, 34px);
  background: rgba(4, 17, 31, 0.88);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-shrink: 0;
  transition: color 0.2s var(--ease);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--mist-100);
}

.brand__rule {
  width: 1px;
  height: 14px;
  background: var(--line-strong);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--steel-400);
  white-space: nowrap;
}

.brand:hover .brand__name { color: var(--cyan-400); }
.brand:hover .brand__sub { color: var(--cyan-200); }

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel-400);
  white-space: nowrap;
}

.header-status__dot {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  background: var(--cyan-400);
  border-radius: 0;
}

.header-top__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.util-link {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-200);
  border: 1px solid var(--line-strong);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.util-link:hover {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.12);
}

.util-link--accent {
  color: var(--abyss-950);
  background: var(--lava-500);
  border-color: var(--lava-500);
  font-weight: 700;
}

.util-link--accent:hover {
  color: var(--abyss-950);
  background: var(--ember-600);
  border-color: var(--ember-600);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 7px 11px;
  color: var(--cyan-200);
  border: 1px solid var(--line-strong);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover {
  color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.1);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform 0.2s var(--ease);
}

.site-header[data-open="true"] .nav-toggle__bars i:first-child {
  transform: translateY(4.5px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bars i:last-child {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  overflow: hidden;
  background: rgba(51, 230, 209, 0.10);
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan-400), var(--lava-500));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
}

/* 左侧索引轨 */
.header-rail {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px 20px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rail-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--steel-400);
}

.rail-head__tag { color: var(--cyan-200); }
.rail-head__num { color: var(--steel-400); }

.site-nav { display: block; }

.nav-list {
  display: flex;
  flex-direction: column;
}

.nav-item { border-bottom: 1px solid var(--line-soft); }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 0 13px 14px;
  color: var(--mist-100);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan-400);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform 0.22s var(--ease);
}

.nav-link:hover {
  color: var(--cyan-200);
  background: rgba(51, 230, 209, 0.06);
}

.nav-link:hover::before { transform: scaleY(0.6); }

.nav-link__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
  transition: color 0.18s var(--ease);
}

.nav-link__label {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.nav-link[aria-current="page"] {
  color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.08);
}

.nav-link[aria-current="page"]::before { transform: scaleY(1); }
.nav-link[aria-current="page"] .nav-link__index { color: var(--cyan-400); }

.rail-foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.rail-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 13px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--lava-500);
  border: 1px solid rgba(255, 107, 53, 0.55);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.rail-cta::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 13px;
}

.rail-cta:hover {
  color: var(--abyss-950);
  background: var(--lava-500);
  border-color: var(--lava-500);
}

.rail-foot__note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--steel-400);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 128px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(11, 43, 71, 0.55), rgba(4, 17, 31, 0.92) 78%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 56px);
  pointer-events: none;
}

.footer-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px clamp(14px, 2vw, 30px);
  padding: 18px var(--gutter);
  border-bottom: 1px solid var(--line);
}

.footer-quick__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--steel-400);
  text-transform: uppercase;
}

.footer-quick__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px clamp(12px, 2vw, 28px);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.14em;
}

.footer-quick__list a {
  color: var(--cyan-200);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-quick__list a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1.45fr) minmax(140px, 0.7fr) minmax(140px, 0.75fr) minmax(240px, 1.15fr);
  gap: clamp(24px, 3.6vw, 64px);
  max-width: 1440px;
  margin-inline: auto;
  padding: clamp(36px, 5vw, 68px) var(--gutter) clamp(28px, 4vw, 52px);
}

.footer-brand__name {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--mist-100);
  transition: color 0.2s var(--ease);
}

.footer-brand__name:hover { color: var(--cyan-400); }

.footer-brand__lockup {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--steel-400);
}

.footer-brand__summary {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--steel-400);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--cyan-400);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col__list a {
  display: inline-block;
  font-size: 14px;
  color: var(--mist-100);
  opacity: 0.84;
  transition: color 0.18s var(--ease), opacity 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-col__list a:hover {
  color: var(--cyan-400);
  opacity: 1;
  transform: translateX(3px);
}

.contact-list {
  display: grid;
  gap: 10px;
  font-size: 13px;
}

.contact-list > div {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.contact-list dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--steel-400);
}

.contact-list dd {
  color: var(--mist-100);
  word-break: break-word;
}

.contact-note {
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid rgba(245, 196, 81, 0.55);
  font-size: 12px;
  line-height: 1.75;
  color: var(--steel-400);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-400);
}

.footer-legal__icp { font-family: var(--font-mono); letter-spacing: 0.1em; }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer-legal__links a { transition: color 0.18s var(--ease); }
.footer-legal__links a:hover { color: var(--cyan-400); }

/* ==========================================================================
   通用布局与组件
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(44px, 6vw, 96px);
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: clamp(24px, 3vw, 44px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--steel-400);
}

.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--cyan-200);
  border: 1px solid var(--line);
  background: rgba(51, 230, 209, 0.06);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: clamp(24px, 3vw, 48px) 0;
}

.display {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(44px, 8vw, 116px);
  line-height: 0.94;
  letter-spacing: 0.01em;
  color: var(--mist-100);
}

.display strong,
.display em {
  font-style: normal;
  font-weight: 700;
  color: var(--cyan-400);
}

.lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.85;
  color: var(--steel-400);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 12px 22px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.14em;
  border: 1px solid var(--line-strong);
  color: var(--cyan-200);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn:hover {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.1);
}

.btn--primary {
  color: var(--abyss-950);
  background: var(--lava-500);
  border-color: var(--lava-500);
  font-weight: 700;
}

.btn--primary:hover {
  color: var(--abyss-950);
  background: var(--ember-600);
  border-color: var(--ember-600);
}

.btn--ghost {
  color: var(--mist-100);
  border-color: rgba(233, 245, 248, 0.28);
  background: transparent;
}

.btn--ghost:hover {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.08);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel-400);
}

.breadcrumb a { transition: color 0.18s var(--ease); }
.breadcrumb a:hover { color: var(--cyan-400); }

.breadcrumb__sep {
  color: rgba(111, 142, 163, 0.6);
}

.breadcrumb [aria-current="page"] { color: var(--cyan-200); }

/* 标签页 */
.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line);
}

.tabs__tab {
  position: relative;
  padding: 11px 18px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--steel-400);
  cursor: pointer;
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.tabs__tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.22s var(--ease);
}

.tabs__tab:hover {
  color: var(--cyan-200);
  background: rgba(51, 230, 209, 0.06);
}

.tabs__tab[aria-selected="true"] {
  color: var(--cyan-400);
  background: rgba(51, 230, 209, 0.09);
}

.tabs__tab[aria-selected="true"]::after { transform: scaleX(1); }

.tabs__panel {
  padding-top: 22px;
}

.tabs__panel[hidden] { display: none; }

/* 折叠面板 */
.accordion {
  border-top: 1px solid var(--line);
}

.accordion__item {
  border-bottom: 1px solid var(--line);
}

.accordion__summary {
  position: relative;
  padding: 15px 34px 15px 0;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.08em;
  color: var(--mist-100);
  cursor: pointer;
  list-style: none;
  transition: color 0.18s var(--ease);
}

.accordion__summary::-webkit-details-marker { display: none; }

.accordion__summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan-400);
}

.accordion__item[open] .accordion__summary { color: var(--cyan-200); }
.accordion__item[open] .accordion__summary::after { content: "–"; }

.accordion__body {
  padding-bottom: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel-400);
}

/* 图片容器基础规则 */
.media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    linear-gradient(155deg, var(--trench-800), var(--abyss-950) 72%);
  border: 1px solid var(--line);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(4, 17, 31, 0) 42%, rgba(4, 17, 31, 0.74) 100%);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-linear-gradient(90deg, rgba(51, 230, 209, 0.10) 0 1px, transparent 1px 48px);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.04);
}

.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media--slant {
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

.media__label {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--cyan-200);
}

.media-grid {
  display: grid;
  gap: clamp(12px, 1.6vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* 数据带 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat {
  padding: 18px 16px;
  background: rgba(7, 29, 50, 0.72);
}

.stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--steel-400);
}

/* 徽章 */
.crest {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan-200);
  border: 1px solid var(--line-strong);
  background: linear-gradient(150deg, rgba(51, 230, 209, 0.16), rgba(4, 17, 31, 0.9) 78%);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
}

/* 滚动显现 */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.has-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   状态点动画（低频）
   ========================================================================== */
@media (prefers-reduced-motion: no-preference) {
  .header-status__dot {
    animation: status-pulse 3.6s ease-in-out infinite;
  }
}

@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(51, 230, 209, 0.42); }
  50% { box-shadow: 0 0 0 6px rgba(51, 230, 209, 0); }
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1023px) {
  body {
    padding-left: 0;
    padding-top: var(--topbar-h-m);
    background-attachment: scroll;
  }

  html { scroll-padding-top: calc(var(--topbar-h-m) + 16px); }

  .site-header {
    inset: 0 0 auto 0;
    width: auto;
    height: var(--topbar-h-m);
    border-right: 0;
    background: transparent;
  }

  .site-header::after { display: none; }

  .header-top {
    left: 0;
    height: var(--topbar-h-m);
    padding: 0 16px;
    gap: 10px;
    background: rgba(4, 17, 31, 0.95);
  }

  .header-status { display: none; }

  .brand__sub { display: none; }

  .brand__name { font-size: 15px; letter-spacing: 0.14em; }

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

  .header-rail {
    position: fixed;
    top: var(--topbar-h-m);
    left: 0;
    right: 0;
    bottom: 0;
    padding: 20px var(--gutter) 30px;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(7, 29, 50, 0.985), rgba(4, 17, 31, 0.995));
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s linear;
    overflow-y: auto;
  }

  .site-header[data-open="true"] .header-rail {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .nav-link { padding: 15px 0 15px 16px; }
  .nav-link__label { font-size: 19px; }
  .rail-foot { margin-top: 26px; padding-top: 18px; }
  .rail-cta { max-width: 320px; }

  .footer-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-legal__links { margin-left: 0; }
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid--asym { grid-template-columns: minmax(0, 1fr); }

  .footer-quick { gap: 10px 16px; }
  .footer-legal { gap: 8px 16px; }
}

@media (max-width: 640px) {
  .footer-main { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .header-top__actions { gap: 6px; }
  .util-link { padding: 4px 8px; font-size: 11px; letter-spacing: 0.1em; }
  .nav-toggle { padding: 6px 9px; font-size: 11px; }
}

@media (max-width: 400px) {
  .header-top__actions { display: none; }
}

/* ==========================================================================
   减少动效
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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