/* ==========================================================================
   威客电竞 · 共享站点样式 /assets/site.css
   设计基调：指挥中心 / 蓝图网格 / 玻璃层与实色层并置
   ========================================================================== */

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

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

:root {
  --bg: #05070E;
  --panel: #0B1220;
  --line: #1C2A44;
  --glass: #16233A;
  --ink: #EAF6FF;
  --ink-soft: #9FB0CC;
  --cyan: #00E5FF;
  --magenta: #FF3D9A;
  --amber: #FFC247;
  --green: #4DFFB0;
  --warn: #FF7A45;

  --rail: 72px;
  --maxw: 1440px;
  --gut: 24px;

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

body {
  margin: 0;
  min-height: 100vh;
  padding-left: 0;
  padding-bottom: calc(74px + env(safe-area-inset-bottom));
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, rgba(28, 42, 68, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 42, 68, 0.34) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }
::selection { background: rgba(0, 229, 255, 0.28); color: #FFFFFF; }

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

/* ---------- 中文排版 ---------- */
p, li { line-height: 1.75; }
p { max-width: 38em; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 8px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--cyan);
  color: #04121A;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid #04121A;
  transition: top 0.16s ease;
}
.skip-link:focus,
.skip-link:focus-visible { top: 8px; }

/* ==========================================================================
   头部外壳
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 60;
}

.scroll-meter {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  z-index: 90;
  background: rgba(28, 42, 68, 0.7);
  pointer-events: none;
}
.scroll-meter-bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--magenta) 100%);
}

/* ---------- 桌面端竖向框架导航 ---------- */
.frame-rail { display: none; }

.rail-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  position: relative;
  z-index: 1;
}
.rail-brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  font-style: italic;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid var(--cyan);
}
.rail-brand-text {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 0.22em;
  color: var(--ink);
}

.rail-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  flex: 1 1 auto;
}
.rail-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
}
.rail-item {
  display: flex;
  justify-content: center;
  width: 100%;
}
.rail-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 58px;
  padding: 9px 0;
  text-decoration: none;
  color: var(--ink-soft);
  border: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.rail-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: rgba(159, 176, 204, 0.75);
  transition: color 0.16s ease;
}
.rail-label {
  writing-mode: vertical-rl;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
}
.rail-link:hover {
  color: var(--ink);
  border-color: rgba(0, 229, 255, 0.45);
  background: rgba(0, 229, 255, 0.07);
}
.rail-link[aria-current="page"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.12);
}
.rail-link[aria-current="page"] .rail-index { color: var(--cyan); }

.rail-foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  width: 48px;
  position: relative;
  z-index: 1;
}
.rail-foot-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(77, 255, 176, 0.7);
}
.rail-foot-text {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}

/* ---------- 顶部状态条 ---------- */
.top-strip {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(5, 7, 14, 0.9);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.strip-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 16px;
  min-height: 58px;
}

.strip-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex: 1 1 auto;
  min-width: 0;
}
.strip-brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  font-style: italic;
  color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, 0.7);
  background: rgba(0, 229, 255, 0.08);
}
.strip-brand-text {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.region-switch {
  display: none;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  background: rgba(11, 18, 32, 0.8);
}
.region-chip {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}
.region-chip:hover { color: var(--ink); border-color: rgba(0, 229, 255, 0.4); }
.region-chip[aria-pressed="true"] {
  color: #04121A;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.strip-actions { display: none; align-items: center; gap: 10px; }

/* ---------- 移动菜单按钮 ---------- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 12px;
  flex: 0 0 auto;
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.55);
  color: var(--cyan);
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease;
}
.nav-toggle:hover { background: rgba(0, 229, 255, 0.14); }
.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 0.16s ease, opacity 0.16s ease;
}
.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); }
.nav-toggle-text {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* ---------- 移动导航面板 ---------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 75;
  padding: 78px 20px calc(104px + env(safe-area-inset-bottom));
  overflow-y: auto;
  overscroll-behavior: contain;
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, rgba(28, 42, 68, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 42, 68, 0.4) 1px, transparent 1px),
    linear-gradient(180deg, rgba(11, 18, 32, 0.98) 0%, rgba(5, 7, 14, 0.99) 100%);
  background-size: 24px 24px, 24px 24px, 100% 100%;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
}
.mobile-nav[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.mobile-nav-head {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.mobile-list { display: flex; flex-direction: column; gap: 8px; }
.mobile-item { border-bottom: 1px solid rgba(28, 42, 68, 0.7); }
.mobile-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 4px;
  text-decoration: none;
  color: var(--ink);
  transition: color 0.16s ease, background-color 0.16s ease;
}
.mobile-link::after {
  content: "→";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--cyan);
  opacity: 0.7;
}
.mobile-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}
.mobile-label {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.mobile-link:hover,
.mobile-link[aria-current="page"] { color: var(--cyan); }
.mobile-nav-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 底部四键快捷条 ---------- */
.quick-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 78;
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(11, 18, 32, 0.97);
  border-top: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.quick-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.quick-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 4px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--ink-soft);
  border-top: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.quick-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.8;
}
.quick-link:hover,
.quick-link:focus-visible,
.quick-link[aria-current="page"] {
  color: var(--cyan);
  border-top-color: var(--cyan);
}

/* ==========================================================================
   通用按钮 / 标签 / 容器
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 9px 16px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-align: center;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}
.btn:hover { border-color: rgba(0, 229, 255, 0.6); color: var(--cyan); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04121A;
}
.btn-primary:hover {
  background: #6BF2FF;
  border-color: #6BF2FF;
  color: #04121A;
}

.btn-ghost {
  color: var(--cyan);
  border-color: rgba(0, 229, 255, 0.55);
  background: rgba(0, 229, 255, 0.07);
}
.btn-ghost:hover {
  background: rgba(0, 229, 255, 0.16);
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn-magenta {
  color: #18000C;
  background: var(--magenta);
  border-color: var(--magenta);
}
.btn-magenta:hover { background: #FF6BB4; border-color: #FF6BB4; color: #18000C; }

.btn-block { width: 100%; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: rgba(22, 35, 58, 0.62);
  border: 1px solid var(--line);
}
.chip--cyan { color: var(--cyan); border-color: rgba(0, 229, 255, 0.5); background: rgba(0, 229, 255, 0.09); }
.chip--magenta { color: var(--magenta); border-color: rgba(255, 61, 154, 0.5); background: rgba(255, 61, 154, 0.1); }
.chip--amber { color: var(--amber); border-color: rgba(255, 194, 71, 0.5); background: rgba(255, 194, 71, 0.1); }
.chip--green { color: var(--green); border-color: rgba(77, 255, 176, 0.5); background: rgba(77, 255, 176, 0.09); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 40px 0; }
.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.title-xl {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 88px);
  font-weight: 800;
  font-style: italic;
  line-height: 0.98;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.18);
}
.title-lg {
  font-family: var(--font-head);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}
.index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.rule {
  height: 1px;
  border: 0;
  margin: 24px 0;
  background: linear-gradient(90deg, var(--line) 0%, rgba(28, 42, 68, 0.15) 100%);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 18px;
}
.glass {
  background: rgba(22, 35, 58, 0.62);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(28, 42, 68, 0.9);
  padding: 18px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: border-color 0.16s ease, background-color 0.16s ease;
}
.card:hover { border-color: rgba(0, 229, 255, 0.55); background: #0E1729; }

.grid { display: grid; gap: var(--gut); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--split { grid-template-columns: 1fr; }

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; color: var(--line); }
.breadcrumbs a { text-decoration: none; color: var(--ink-soft); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--ink); }

/* ---------- 图片容器基座（页面阶段放置图片占位） ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  background-color: var(--panel);
  background-image:
    linear-gradient(135deg, rgba(22, 35, 58, 0.95) 0%, rgba(11, 18, 32, 0.98) 100%),
    linear-gradient(to right, rgba(28, 42, 68, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 42, 68, 0.6) 1px, transparent 1px);
  background-size: 100% 100%, 24px 24px, 24px 24px;
  border: 1px solid rgba(0, 229, 255, 0.35);
}
.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, rgba(0, 229, 255, 0.05) 0 1px, transparent 1px 4px),
    radial-gradient(120% 120% at 50% 50%, transparent 45%, rgba(5, 7, 14, 0.85) 100%);
}
.img-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}
.img-frame--wide { aspect-ratio: 16 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--portrait { aspect-ratio: 4 / 5; }
.img-frame__tag {
  position: absolute;
  left: 10px;
  top: 10px;
  z-index: 3;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(5, 7, 14, 0.78);
  border: 1px solid rgba(0, 229, 255, 0.55);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: 56px;
  background: linear-gradient(180deg, #05070E 0%, #0B1220 58%, #070B14 100%);
  border-top: 1px solid var(--line);
}
.foot-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 20px 24px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.foot-brand { display: flex; flex-direction: column; gap: 12px; }
.foot-lockup {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 0.04em;
  color: var(--ink);
  max-width: none;
}
.foot-lockup-en {
  color: var(--cyan);
  font-size: 18px;
  letter-spacing: 0.14em;
}
.foot-summary {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 30em;
}
.foot-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  border: 1px solid rgba(255, 194, 71, 0.55);
  background: rgba(255, 194, 71, 0.08);
}
.foot-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.foot-col { display: flex; flex-direction: column; gap: 12px; }
.foot-col-title {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.foot-links { display: flex; flex-direction: column; gap: 8px; }
.foot-links a {
  display: inline-block;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  padding-left: 0;
  border-left: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease, padding-left 0.16s ease;
}
.foot-links a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
  padding-left: 8px;
}

.foot-contact { display: flex; flex-direction: column; gap: 12px; }
.contact-list { display: flex; flex-direction: column; gap: 10px; }
.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(28, 42, 68, 0.9);
}
.contact-row:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.contact-value {
  font-size: 13px;
  color: var(--ink);
  word-break: break-word;
}
.contact-row--wide .contact-value { font-size: 13px; color: var(--ink-soft); }
.copy-btn {
  margin-left: auto;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.07);
  border: 1px solid rgba(0, 229, 255, 0.45);
  cursor: pointer;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}
.copy-btn:hover { background: rgba(0, 229, 255, 0.16); }
.copy-btn[data-copied="true"] {
  color: var(--green);
  border-color: var(--green);
  background: rgba(77, 255, 176, 0.12);
}

.foot-base {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 34px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-soft);
}
.foot-icp { font-family: var(--font-mono); letter-spacing: 0.04em; max-width: none; }
.foot-legal { max-width: 46em; }
.foot-copy { font-family: var(--font-mono); letter-spacing: 0.04em; max-width: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (min-width: 560px) {
  .region-switch { display: inline-flex; }
  .foot-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-brand { grid-column: 1 / -1; }
  .foot-contact { grid-column: 1 / -1; }
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .section { padding: 56px 0; }
  .container { padding: 0 32px; }
  .foot-inner { padding: 52px 32px 28px; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--split { grid-template-columns: 4fr 8fr; }
  .foot-base { flex-direction: row; align-items: center; justify-content: space-between; gap: 16px; }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail); padding-bottom: 0; }

  .frame-rail {
    display: flex;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--rail);
    z-index: 85;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    padding: 18px 0 16px;
    overflow-y: auto;
    background: linear-gradient(180deg, #070B14 0%, #05070E 55%, #0B1220 100%);
    border-right: 1px solid var(--line);
  }
  .frame-rail::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: repeating-linear-gradient(180deg, rgba(0, 229, 255, 0.07) 0 1px, transparent 1px 6px);
    opacity: 0.55;
  }

  .strip-brand { display: none; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none; }
  .quick-bar { display: none; }

  .strip-inner {
    padding: 12px 40px;
    gap: 18px;
    justify-content: space-between;
  }
  .region-switch { margin-right: auto; }
  .strip-actions { display: flex; }

  .container { padding: 0 40px; }
  .section { padding: 64px 0; }

  .foot-inner { padding: 64px 40px 32px; }
  .foot-grid {
    grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr 1.3fr;
    gap: 32px;
  }
  .foot-brand { grid-column: auto; }
  .foot-contact { grid-column: auto; }
}

@media (min-width: 1280px) {
  .grid--split { grid-template-columns: 5fr 7fr; }
}

/* ==========================================================================
   可访问性 / 降低动效
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
  .btn:active { transform: none; }
  .foot-links a:hover { padding-left: 0; }
}