/* =============================================================
   超凡娱乐汇 · CN 品牌通道
   全站共享样式 /assets/site.css
   蓝图网格 · 玻璃胶囊 · 霓虹紫强调 · 连续画布
   ============================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #060A18;
}

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

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

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

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

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

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

[hidden] { display: none !important; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --deep: #060A18;
  --night: #0B1430;
  --indigo: #1B1F4B;
  --violet: #8B5CF6;
  --cyan: #22D3EE;
  --gold: #F5B942;
  --glass: #E8ECF8;
  --mist: #9AA6C9;
  --grid: #2A3560;
  --mint: #3DDC97;
  --amber: #FF7A45;

  --line: rgba(42, 53, 96, .72);
  --line-soft: rgba(42, 53, 96, .42);
  --line-accent: rgba(139, 92, 246, .34);

  --glass-1: rgba(27, 31, 75, .52);
  --glass-2: rgba(11, 20, 48, .74);

  --sans: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1360px;
  --gutter: clamp(16px, 4vw, 48px);
  --radius: 18px;
  --radius-lg: 26px;

  --shadow-lift: 0 24px 60px -34px rgba(0, 0, 0, .95);
  --shadow-glow: 0 18px 34px -18px rgba(139, 92, 246, .85);

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版与蓝图底 ---------- */
body {
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--glass);
  background-color: var(--deep);
  background-image:
    linear-gradient(rgba(42, 53, 96, .20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 96, .20) 1px, transparent 1px),
    radial-gradient(900px 520px at 80% -10%, rgba(139, 92, 246, .20), transparent 62%),
    radial-gradient(760px 500px at 4% 14%, rgba(34, 211, 238, .10), transparent 60%);
  background-size: 72px 72px, 72px 72px, 100% 100%, 100% 100%;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--glass);
}

h1 { font-size: clamp(34px, 5.4vw, 68px); }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 25px); }
h4 { font-size: 18px; letter-spacing: -.01em; }

p { max-width: 68ch; }

strong { font-weight: 700; color: #fff; }

::selection { background: rgba(139, 92, 246, .48); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- 4. 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -72px;
  z-index: 200;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--cyan);
  color: #04121A;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  box-shadow: 0 12px 28px -14px rgba(34, 211, 238, .9);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 5. 头部 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(6, 10, 24, .94), rgba(6, 10, 24, .74));
  border-bottom: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
}

.head-rail {
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(var(--wrap), calc(100% - var(--gutter)));
  margin: 0 auto;
  padding: 7px 0 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.rail-mono { white-space: nowrap; }
.rail-mono--accent { color: var(--cyan); }

.rail-ticks {
  flex: 1 1 auto;
  height: 1px;
  min-width: 24px;
  background-image: repeating-linear-gradient(90deg,
    rgba(42, 53, 96, .95) 0 1px,
    transparent 1px 14px);
}

.head-capsule {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--wrap), calc(100% - var(--gutter)));
  margin: 10px auto 12px;
  padding: 10px 12px 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-accent);
  background: linear-gradient(120deg, rgba(27, 31, 75, .68), rgba(11, 20, 48, .58));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow:
    0 24px 50px -34px rgba(0, 0, 0, .95),
    inset 0 1px 0 rgba(232, 236, 248, .07);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 0 1 auto;
}

.brand-glyph {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--violet), #4C2FB0);
  color: #fff;
  font-size: 16px;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(139, 92, 246, .55), 0 12px 26px -14px var(--violet);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.18;
}

.brand-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--glass);
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

/* 导航 */
.head-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 1 auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--mist);
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.nav-list a:hover {
  color: var(--glass);
  background: rgba(34, 211, 238, .10);
}

.nav-list a[aria-current="page"] {
  color: #fff;
  background: linear-gradient(120deg, rgba(139, 92, 246, .34), rgba(34, 211, 238, .16));
  box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .52);
}

.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: translateX(-50%);
}

.nav-list a::before {
  content: attr(data-index);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--mist);
  display: none;
}

.nav-utility {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.util-link {
  padding: 7px 10px;
  border-radius: 9px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist);
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.util-link:hover {
  color: var(--cyan);
  background: rgba(34, 211, 238, .09);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
  padding: 11px 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--violet), #6D3BF0);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: var(--shadow-glow);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.nav-cta::after {
  content: "→";
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 38px -16px rgba(139, 92, 246, .95);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-accent);
  background: rgba(27, 31, 75, .72);
  color: var(--glass);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  flex: 0 0 auto;
}

.toggle-bars {
  position: relative;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: background-color .2s var(--ease);
}

.toggle-bars::before,
.toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform .22s var(--ease), top .22s var(--ease);
}

.toggle-bars::before { top: -5px; }
.toggle-bars::after { top: 5px; }

[data-site-head][data-open] .toggle-bars { background: transparent; }
[data-site-head][data-open] .toggle-bars::before { top: 0; transform: rotate(45deg); }
[data-site-head][data-open] .toggle-bars::after { top: 0; transform: rotate(-45deg); }

/* 阅读进度 */
.head-progress {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  overflow: hidden;
  background: rgba(42, 53, 96, .55);
}

.head-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  transition: width .1s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  background: linear-gradient(180deg, rgba(11, 20, 48, .92), rgba(6, 10, 24, 1));
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent);
  opacity: .8;
}

.site-foot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 53, 96, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 96, .16) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 72%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 72%);
}

.foot-wrap {
  position: relative;
  z-index: 1;
  width: min(var(--wrap), calc(100% - var(--gutter)));
  margin: 0 auto;
  padding: clamp(40px, 6vw, 84px) 0 32px;
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) 2.6fr;
  gap: clamp(28px, 5vw, 72px);
}

.foot-brand__name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--glass);
}

.foot-brand__sub {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--mist);
  max-width: 26ch;
}

.foot-mono {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist);
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 42px);
}

.foot-col__title {
  position: relative;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.foot-col__title::before {
  content: attr(data-index) " / ";
  color: var(--mist);
}

.foot-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.foot-links a {
  display: inline-block;
  font-size: 15px;
  color: var(--mist);
  transition: color .2s var(--ease), transform .2s var(--ease);
}

.foot-links a:hover {
  color: var(--glass);
  transform: translateX(3px);
}

.foot-note {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(154, 166, 201, .72);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  margin-top: clamp(32px, 5vw, 60px);
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.foot-legal__line {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
  max-width: none;
}

.foot-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.foot-legal__links a {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--mist);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.foot-legal__links a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.foot-contact,
.foot-service {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(154, 166, 201, .82);
  max-width: 92ch;
}

.foot-service { color: rgba(154, 166, 201, .62); }

/* ---------- 7. 布局与容器 ---------- */
.main-content { display: block; position: relative; z-index: 1; }

.wrap {
  width: min(var(--wrap), calc(100% - var(--gutter)));
  margin-inline: auto;
}

.wrap--narrow {
  width: min(880px, calc(100% - var(--gutter)));
  margin-inline: auto;
}

.section {
  padding-block: clamp(48px, 7vw, 108px);
  scroll-margin-top: 130px;
}

.section--alt {
  background: linear-gradient(180deg, rgba(11, 20, 48, .6), rgba(6, 10, 24, 0));
  border-block: 1px solid var(--line-soft);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.cols-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.cols-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.stack { display: flex; flex-direction: column; gap: clamp(14px, 2vw, 24px); }

/* 章节头：等宽索引 + 霓虹紫竖线 */
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-left: 16px;
  border-left: 3px solid var(--violet);
  margin-bottom: clamp(20px, 3vw, 38px);
}

.sec-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.sec-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
}

/* ---------- 8. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease),
              background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.btn--primary {
  background: linear-gradient(120deg, var(--violet), #6D3BF0);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 42px -18px rgba(139, 92, 246, .95);
}

.btn--ghost {
  border-color: var(--line-accent);
  background: rgba(27, 31, 75, .48);
  color: var(--glass);
}

.btn--ghost:hover {
  border-color: rgba(34, 211, 238, .62);
  background: rgba(34, 211, 238, .10);
  color: #fff;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--mist);
}

.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li::after { content: "/"; color: rgba(42, 53, 96, 1); }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--mist); transition: color .2s var(--ease); }
.breadcrumb a:hover { color: var(--cyan); }

.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.1em; }
.prose h2 { margin: 1.4em 0 .5em; }
.prose h3 { margin: 1.2em 0 .4em; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.prose a:hover { color: #fff; }

.panel {
  padding: clamp(20px, 3vw, 34px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, var(--glass-1), rgba(6, 10, 24, .62));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.panel--solid {
  background: var(--night);
  border-color: var(--line);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.mono-num {
  font-family: var(--mono);
  font-size: .86em;
  letter-spacing: .04em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, .72);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
}

.tag--mint { color: var(--mint); border-color: rgba(61, 220, 151, .44); background: rgba(61, 220, 151, .10); }
.tag--amber { color: var(--amber); border-color: rgba(255, 122, 69, .44); background: rgba(255, 122, 69, .10); }
.tag--violet { color: #C4B5FD; border-color: rgba(139, 92, 246, .48); background: rgba(139, 92, 246, .16); }

/* ---------- 9. 图片容器基础规则 ---------- */
.figure,
.fig-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(140deg, rgba(27, 31, 75, .9), rgba(6, 10, 24, .92));
}

.figure::before,
.fig-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 53, 96, .30) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 96, .30) 1px, transparent 1px);
  background-size: 36px 36px, 36px 36px;
  opacity: .5;
}

.figure img,
.fig-frame img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.figure--wide img { aspect-ratio: 21 / 9; }
.figure--tall img { aspect-ratio: 3 / 4; }
.figure--square img { aspect-ratio: 1 / 1; }
.figure--soft { border-color: var(--line-soft); border-radius: var(--radius-lg); }

.fig-caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 10. 标签页与筛选 ---------- */
.tabs { display: block; }

.tablist {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(27, 31, 75, .62);
}

.tab {
  padding: 9px 18px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--mist);
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.tab:hover { color: var(--glass); }

.tab[aria-selected="true"] {
  color: #fff;
  background: linear-gradient(120deg, rgba(139, 92, 246, .92), rgba(34, 211, 238, .55));
  box-shadow: 0 12px 26px -16px rgba(139, 92, 246, .95);
}

.tabpanel { padding-top: clamp(20px, 3vw, 34px); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.chip {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, .62);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  transition: color .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease);
}

.chip:hover { color: var(--glass); border-color: rgba(34, 211, 238, .55); }

.chip[aria-pressed="true"] {
  color: #04212A;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}

/* ---------- 11. 动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .js [data-reveal] { opacity: 1; transform: none; }
  .head-progress__bar { transition: none; }
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1240px) {
  .nav-list a { padding: 9px 11px; font-size: 14px; }
  .nav-cta { padding: 10px 15px; font-size: 13.5px; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .head-nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: min(340px, calc(100vw - var(--gutter) - 8px));
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px;
    border-radius: 22px;
    border: 1px solid var(--line-accent);
    background: rgba(11, 20, 48, .97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    box-shadow: 0 34px 64px -30px rgba(0, 0, 0, .95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(.98);
    transform-origin: top right;
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease);
  }

  .head-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15.5px;
  }

  .nav-list a::before { display: block; }

  .nav-list a[aria-current="page"]::after { display: none; }

  .nav-utility {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin: 12px 0 0;
    padding: 12px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .util-link { padding: 10px 14px; border-radius: 10px; }

  .nav-cta {
    justify-content: center;
    margin: 8px 0 0;
    padding: 13px 18px;
  }

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

@media (max-width: 720px) {
  body { font-size: 16px; }

  .head-rail { font-size: 10px; letter-spacing: .12em; }
  .rail-mono--accent { display: none; }

  .head-capsule { padding: 9px 10px 9px 14px; gap: 10px; }

  .brand-glyph { width: 32px; height: 32px; border-radius: 10px; }

  .head-progress { left: 14px; right: 14px; }

  .foot-cols { grid-template-columns: 1fr; }

  .foot-legal { flex-direction: column; align-items: flex-start; }

  .sec-head { padding-left: 12px; border-left-width: 2px; }
}

@media (max-width: 460px) {
  .brand-sub { display: none; }
  .brand-name { font-size: 16px; }
  .nav-toggle { padding: 9px 13px; }
  .nav-toggle .toggle-label { display: none; }
  p { max-width: 100%; }
}