/* ==========================================================
   NG娱乐 / play-ngfun.com.cn — 全站共享样式
   主题变量 · 基础重置 · 头部导航 · 页脚 · 排版 · 通用组件
   ========================================================== */

/* ---------- 主题变量 ---------- */
:root {
  --ng-bg-deep: #0A0E23;
  --ng-bg-body: #0F152E;
  --ng-bg-card: #151B32;
  --ng-bg-elevated: #1B2340;
  --ng-accent-cyan: #00D4FF;
  --ng-accent-gold: #FFA940;
  --ng-accent-orange: #FF6A3D;
  --ng-text-primary: #F5F7FF;
  --ng-text-secondary: #A6B0D4;
  --ng-border: #2C3655;
  --ng-success: #3DDC97;
  --ng-warning: #FFD166;
  --ng-font-head: 'Rajdhani', 'Bahnschrift', 'DIN Alternate', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --ng-font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --ng-font-num: 'Roboto Mono', 'SFMono-Regular', Consolas, 'Noto Sans SC', monospace;
  --ng-header-h: 76px;
  --ng-content-max: 1280px;
  --ng-radius: 16px;
  --ng-shadow-sm: 0 6px 18px rgba(0, 0, 0, .24);
  --ng-shadow: 0 20px 50px rgba(0, 0, 0, .40);
}

html[data-theme="light"] {
  --ng-bg-deep: #DCE2F0;
  --ng-bg-body: #F2F4FB;
  --ng-bg-card: #FFFFFF;
  --ng-bg-elevated: #FFFFFF;
  --ng-text-primary: #0F152E;
  --ng-text-secondary: #55608A;
  --ng-border: #C7CEE8;
  --ng-shadow-sm: 0 6px 18px rgba(40, 50, 90, .10);
  --ng-shadow: 0 20px 50px rgba(40, 50, 90, .14);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--ng-font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ng-text-primary);
  background: var(--ng-bg-body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main[id] { scroll-margin-top: var(--ng-header-h); }

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

a {
  color: var(--ng-accent-cyan);
  text-decoration: none;
  transition: color .25s ease;
}

a:hover { color: var(--ng-accent-gold); }

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

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

address { font-style: normal; }

::selection {
  background: rgba(0, 212, 255, .30);
  color: var(--ng-text-primary);
}

:focus-visible {
  outline: 2px solid var(--ng-accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ---------- 头部外壳 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--ng-header-h);
  display: flex;
  align-items: stretch;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease, box-shadow .35s ease;
}

.site-header[data-scrolled="true"],
.site-header[data-open="true"] {
  background: rgba(10, 14, 35, .82);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--ng-border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .32);
}

html[data-theme="light"] .site-header[data-scrolled="true"],
html[data-theme="light"] .site-header[data-open="true"] {
  background: rgba(242, 244, 251, .86);
}

.header-inner {
  width: min(var(--ng-content-max), 100% - 48px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--ng-accent-cyan), var(--ng-accent-gold), var(--ng-accent-orange));
  transform: scaleX(0);
  transform-origin: left;
  z-index: 3;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 300;
  padding: 12px 22px;
  font-family: var(--ng-font-head);
  font-weight: 700;
  letter-spacing: .06em;
  color: #0A0E23;
  background: var(--ng-accent-cyan);
  border-radius: 12px;
  box-shadow: var(--ng-shadow-sm);
  transition: top .3s ease;
}

.skip-link:focus-visible { top: 16px; }

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--ng-text-primary);
}

.brand:hover { color: var(--ng-text-primary); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--ng-font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--ng-accent-cyan);
  background: var(--ng-bg-card);
  border: 2px solid var(--ng-accent-cyan);
  border-radius: 12px 4px 12px 4px;
  box-shadow: 0 0 18px rgba(0, 212, 255, .20);
  transition: background .25s ease, transform .25s ease;
}

.brand:hover .brand-mark {
  background: rgba(0, 212, 255, .12);
  transform: rotate(-3deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--ng-font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .12em;
}

.brand-sub {
  font-family: var(--ng-font-num);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--ng-text-secondary);
  text-transform: uppercase;
}

/* ---------- 主导航 ---------- */
.main-nav, .nav-list {
  display: flex;
  align-items: center;
}

.nav-list { gap: 6px; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  font-family: var(--ng-font-head);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ng-text-primary);
  border-radius: 10px;
  transition: color .22s ease, background .22s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--ng-accent-cyan), var(--ng-accent-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}

.nav-link:hover {
  color: var(--ng-accent-cyan);
  background: rgba(0, 212, 255, .06);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--ng-accent-gold); }

/* ---------- 头部操作区 ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contrast-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 14px;
  font-family: var(--ng-font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .10em;
  color: var(--ng-text-primary);
  background: var(--ng-bg-card);
  border: 1px solid var(--ng-border);
  border-radius: 999px;
  transition: border-color .25s ease, color .25s ease, background .25s ease;
}

.contrast-toggle:hover {
  border-color: var(--ng-accent-gold);
  color: var(--ng-accent-gold);
  background: var(--ng-bg-elevated);
}

.contrast-icon {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--ng-accent-gold);
  background: var(--ng-accent-orange);
  box-shadow: 0 0 12px rgba(255, 169, 64, .45);
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}

html[data-theme="light"] .contrast-icon {
  background: var(--ng-accent-cyan);
  border-color: var(--ng-accent-cyan);
  box-shadow: 0 0 12px rgba(0, 212, 255, .45);
}

.settings-group {
  position: relative;
  display: inline-flex;
}

.settings-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 16px;
  font-family: var(--ng-font-head);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--ng-text-primary);
  background: linear-gradient(135deg, rgba(255, 169, 64, .20), rgba(255, 106, 61, .12));
  border: 1px solid rgba(255, 169, 64, .55);
  border-radius: 999px;
  transition: border-color .25s ease, background .25s ease, color .25s ease;
}

.settings-toggle:hover {
  border-color: var(--ng-accent-gold);
  background: linear-gradient(135deg, rgba(255, 169, 64, .32), rgba(255, 106, 61, .22));
}

.settings-toggle[aria-expanded="true"] {
  border-color: var(--ng-accent-cyan);
  color: var(--ng-accent-cyan);
  background: rgba(0, 212, 255, .08);
}

.settings-chevron {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid currentColor;
  transition: transform .30s ease;
}

.settings-toggle[aria-expanded="true"] .settings-chevron { transform: rotate(180deg); }

.settings-panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 280px;
  padding: 18px;
  background: var(--ng-bg-elevated);
  border: 1px solid var(--ng-border);
  border-radius: 16px;
  box-shadow: var(--ng-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
  z-index: 220;
}

.settings-panel[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.settings-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ng-text-secondary);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--ng-border);
}

.settings-list { display: grid; gap: 4px; }

.settings-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ng-text-primary);
  border-radius: 8px;
  transition: background .20s ease, color .20s ease;
}

.settings-link::after {
  content: '→';
  font-family: var(--ng-font-num);
  color: var(--ng-accent-cyan);
  transition: transform .20s ease;
}

.settings-link:hover {
  background: rgba(0, 212, 255, .08);
  color: var(--ng-accent-cyan);
}

.settings-link:hover::after { transform: translateX(3px); }

/* ---------- 移动端菜单按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 14px;
  font-family: var(--ng-font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ng-text-primary);
  background: var(--ng-bg-card);
  border: 1px solid var(--ng-border);
  border-radius: 12px;
  transition: border-color .25s ease, background .25s ease;
}

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

.nav-toggle-box {
  width: 20px;
  display: grid;
  gap: 5px;
}

.nav-toggle-box .bar {
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 移动端导航断点 ---------- */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; }

  .main-nav {
    position: fixed;
    top: var(--ng-header-h);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--ng-header-h));
    overflow-y: auto;
    align-items: flex-start;
    padding: 16px 24px 32px;
    background: rgba(10, 14, 35, .96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 2px solid var(--ng-border);
    box-shadow: 0 30px 60px rgba(0, 0, 0, .45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity .30s ease, transform .30s ease, visibility .30s ease;
    z-index: 210;
  }

  html[data-theme="light"] .main-nav { background: rgba(242, 244, 251, .97); }

  .main-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    display: grid;
    gap: 4px;
    width: 100%;
  }

  .nav-item { width: 100%; }

  .nav-link {
    width: 100%;
    padding: 14px 18px;
    font-size: 19px;
    border-bottom: 1px solid var(--ng-border);
    border-radius: 0;
  }

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

  .nav-link[aria-current="page"] {
    color: var(--ng-accent-gold);
    background: rgba(255, 169, 64, .08);
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 100px;
  padding: 72px 0 36px;
  background: var(--ng-bg-deep);
  border-top: 1px solid var(--ng-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 5%;
  right: 5%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--ng-accent-cyan) 28%, var(--ng-accent-gold) 58%, var(--ng-accent-orange) 78%, transparent);
  filter: drop-shadow(0 0 12px rgba(0, 212, 255, .55));
}

.footer-inner {
  width: min(var(--ng-content-max), 100% - 48px);
  margin-inline: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.6fr;
  gap: 48px;
  align-items: start;
}

.footer-brand-block { max-width: 460px; }

.footer-brand { margin-bottom: 18px; }

.footer-statement {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ng-text-secondary);
}

.footer-trust {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ng-text-secondary);
}

.trust-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ng-success);
  box-shadow: 0 0 10px var(--ng-success);
}

.footer-col { display: grid; align-content: start; gap: 14px; }

.footer-title {
  font-family: var(--ng-font-head);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .20em;
  text-transform: uppercase;
  color: var(--ng-accent-cyan);
  margin-bottom: 10px;
}

.footer-links { display: grid; gap: 10px; }

.footer-links a {
  color: var(--ng-text-secondary);
  font-size: 15px;
  transition: color .20s ease, padding-left .20s ease;
}

.footer-links a:hover {
  color: var(--ng-accent-gold);
  padding-left: 6px;
}

.footer-contact {
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ng-text-secondary);
}

.footer-hour {
  font-size: 12px;
  color: var(--ng-text-secondary);
  opacity: .8;
  margin-top: 8px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--ng-border);
  font-size: 13px;
  color: var(--ng-text-secondary);
}

.footer-copy { font-family: var(--ng-font-num); letter-spacing: .02em; }

.footer-icp { font-family: var(--ng-font-num); letter-spacing: .04em; }

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- 内容容器与页面排版 ---------- */
.container {
  width: min(var(--ng-content-max), 100% - 48px);
  margin-inline: auto;
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, var(--ng-content-max)); }
}

.page-shell {
  padding-top: calc(var(--ng-header-h) + 24px);
  min-height: 60vh;
}

.page-title {
  font-family: var(--ng-font-head);
  font-size: clamp(44px, 7vw, 92px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: var(--ng-text-secondary);
  max-width: 640px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 16px;
  font-family: var(--ng-font-head);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 28px;
}

.section-heading::after {
  content: '';
  flex: 1;
  max-width: 140px;
  height: 2px;
  background: linear-gradient(90deg, var(--ng-accent-cyan), transparent);
}

.num-index {
  font-family: var(--ng-font-num);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ng-accent-gold);
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 8px 0 28px;
  font-size: 14px;
  color: var(--ng-text-secondary);
}

.crumbs li { display: inline-flex; align-items: center; }

.crumbs li + li::before {
  content: '/';
  margin-right: 10px;
  color: var(--ng-border);
  font-family: var(--ng-font-num);
}

.crumbs a {
  color: var(--ng-text-secondary);
  transition: color .20s ease;
}

.crumbs a:hover { color: var(--ng-accent-gold); }

.crumb-current {
  color: var(--ng-text-primary);
  font-weight: 600;
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 28px;
  font-family: var(--ng-font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ng-text-primary);
  background: linear-gradient(135deg, var(--ng-accent-gold), var(--ng-accent-orange));
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(255, 106, 61, .26);
  overflow: hidden;
  transition: transform .20s ease, box-shadow .20s ease, filter .20s ease;
}

.btn::after {
  content: '';
  position: absolute;
  top: -20%;
  left: -50%;
  width: 40%;
  height: 140%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .35), transparent);
  transform: skewX(-20deg);
  transition: left .45s ease;
}

.btn:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(255, 106, 61, .34);
}

.btn:hover::after { left: 130%; }

.btn:active {
  transform: translateY(0) scale(.97);
  box-shadow: 0 8px 22px rgba(255, 106, 61, .22);
}

.btn-ghost {
  color: var(--ng-text-primary);
  background: var(--ng-bg-card);
  box-shadow: none;
  border: 1px solid var(--ng-border);
}

.btn-ghost::after { display: none; }

.btn-ghost:hover {
  border-color: var(--ng-accent-cyan);
  background: var(--ng-bg-elevated);
  filter: none;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.panel-card {
  grid-column: span 4;
  background: var(--ng-bg-card);
  border: 2px solid var(--ng-border);
  border-radius: var(--ng-radius);
  padding: 28px;
  box-shadow: var(--ng-shadow-sm);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.panel-card:hover {
  transform: translateY(-4px);
  border-color: var(--ng-accent-cyan);
  background: var(--ng-bg-elevated);
}

@media (max-width: 1024px) {
  .panel-card { grid-column: span 6; }
}

@media (max-width: 640px) {
  .panel-card { grid-column: span 12; }
}

/* ---------- 标签与媒体容器 ---------- */
.label-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-family: var(--ng-font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ng-accent-cyan);
  background: rgba(0, 212, 255, .07);
  border: 1px solid var(--ng-border);
  border-radius: 999px;
}

.media-frame {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(0, 212, 255, .14), transparent 55%),
    radial-gradient(circle at 75% 85%, rgba(255, 169, 64, .10), transparent 50%),
    var(--ng-bg-card);
  border: 2px solid var(--ng-border);
  border-radius: var(--ng-radius);
  box-shadow: var(--ng-shadow);
}

.media-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--ng-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--ng-border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .35;
}

.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  border: 1px solid rgba(255, 169, 64, .16);
  border-radius: var(--ng-radius);
}

.media-frame img,
.media-frame video,
.media-frame svg {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 可折叠内容组 ---------- */
.collapse-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 4px;
  font-family: var(--ng-font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: left;
  color: var(--ng-text-primary);
  border-bottom: 1px solid var(--ng-border);
  transition: color .22s ease, border-color .22s ease;
}

.collapse-trigger:hover {
  color: var(--ng-accent-cyan);
  border-color: var(--ng-accent-cyan);
}

.collapse-trigger[aria-expanded="true"] { color: var(--ng-accent-gold); }

.collapse-trigger::after {
  content: '+';
  font-family: var(--ng-font-num);
  font-size: 22px;
  line-height: 1;
  color: var(--ng-accent-gold);
  flex-shrink: 0;
  transition: transform .30s ease, color .30s ease;
}

.collapse-trigger[aria-expanded="true"]::after {
  transform: rotate(45deg);
  color: var(--ng-accent-cyan);
}

.collapse-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .45s cubic-bezier(.22, .61, .36, 1);
}

.collapse-panel[data-open="true"] { grid-template-rows: 1fr; }

.collapse-content {
  overflow: hidden;
  min-height: 0;
  padding: 4px 4px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ng-text-secondary);
}

/* ---------- 滚动显现 ---------- */
html[data-scroll-ready] [data-scroll-show] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .55s ease, transform .55s ease;
}

html[data-scroll-ready] [data-scroll-show][data-shown="true"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html[data-scroll-ready] [data-scroll-show] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ---------- 窄屏细节调整 ---------- */
@media (max-width: 640px) {
  .header-inner { width: min(100% - 24px, var(--ng-content-max)); }

  .brand-sub { display: none; }

  .contrast-label,
  .nav-toggle-text { display: none; }

  .contrast-toggle {
    width: 42px;
    padding: 0;
    justify-content: center;
  }

  .settings-toggle { padding: 0 12px; }

  .settings-panel {
    position: fixed;
    top: calc(var(--ng-header-h) + 8px);
    left: 16px;
    right: 16px;
    width: auto;
  }

  .footer-inner { width: min(100% - 28px, var(--ng-content-max)); }
}