/* =========================================================
   PG娱乐 中文站 · 共享样式 /assets/site.css
   01 变量  02 重置  03 基础排版  04 布局工具
   05 排版组件  06 图片容器  07 头部  08 页脚
   09 动效  10 响应式  11 无障碍降级
   ========================================================= */

/* ---------- 01 变量 ---------- */
:root {
  --c-deep: #0A1633;
  --c-night: #132447;
  --c-neon: #35E6D2;
  --c-amber: #FF8A3D;
  --c-violet: #A78BFA;
  --c-mint: #6EE7B7;
  --c-paper: #F4F6FB;
  --c-ink: #0B0F1A;
  --c-muted: #6B7A99;
  --c-rule: #C7D2E5;
  --c-neon-ink: #0D8479;

  --neon-08: rgba(53, 230, 210, 0.08);
  --neon-18: rgba(53, 230, 210, 0.18);
  --neon-35: rgba(53, 230, 210, 0.35);
  --paper-12: rgba(244, 246, 251, 0.12);
  --paper-55: rgba(244, 246, 251, 0.55);
  --paper-60: rgba(244, 246, 251, 0.62);
  --paper-80: rgba(244, 246, 251, 0.84);

  --font-display: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: 28px;
  --fs-40: 40px;
  --fs-64: 64px;
  --fs-96: 96px;
  --fs-120: 120px;

  --shell: 1480px;
  --gutter: clamp(18px, 4.2vw, 64px);
  --header-h: 92px;
  --radius: 3px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 02 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--c-deep);
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
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; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content {
  display: block;
  scroll-margin-top: 108px;
}

/* ---------- 03 基础排版 ---------- */
.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(44px, 7.6vw, 112px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 4.4vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 2.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-neon);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.band--paper .eyebrow { color: var(--c-neon-ink); }

.tag {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--c-violet);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.12em;
  color: var(--c-violet);
}

.tag--neon { border-color: var(--neon-35); color: var(--c-neon); }
.tag--amber { border-color: rgba(255, 138, 61, 0.55); color: var(--c-amber); }
.tag--mint { border-color: rgba(110, 231, 183, 0.55); color: var(--c-mint); }

.band--paper .tag { border-color: #7C5CE6; color: #5B3FC4; }
.band--paper .tag--neon { border-color: #0D8479; color: #0D8479; }
.band--paper .tag--amber { border-color: #D96A1E; color: #B25210; }
.band--paper .tag--mint { border-color: #17946A; color: #12795A; }

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.82;
}

.prose p + p { margin-top: 1.05em; }

.prose h2 {
  margin-top: 1.9em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.3;
}

.prose h3 {
  margin-top: 1.6em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.45;
}

.prose ul,
.prose ol {
  margin-top: 1em;
  padding-left: 1.35em;
}

.prose ul li { position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: -1.05em;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--c-amber);
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose a { border-bottom: 1px solid var(--c-neon); }
.prose strong { font-weight: 700; }
.prose code {
  padding: 0.12em 0.4em;
  border-radius: 2px;
  background: var(--neon-08);
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: 0.04em;
}

.band--deep .prose,
.band--night .prose { color: var(--paper-80); }
.band--deep .prose code,
.band--night .prose code { background: rgba(53, 230, 210, 0.14); }
.band--paper .prose { color: #1B2438; }

/* ---------- 04 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--narrow { max-width: 1040px; }

.band { position: relative; width: 100%; }
.band--deep { background-color: var(--c-deep); color: var(--paper-80); }
.band--night { background-color: var(--c-night); color: var(--paper-80); }
.band--paper { background-color: var(--c-paper); color: #1B2438; }

.section { padding-block: clamp(56px, 7vw, 112px); }
.section--tight { padding-block: clamp(36px, 4.5vw, 64px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-12 { grid-column: span 12; }

.stack { display: grid; gap: 16px; }
.stack-lg { display: grid; gap: clamp(24px, 3vw, 40px); }

.rule-x {
  height: 1px;
  border: 0;
  background: var(--c-rule);
}

.rule-x--neon {
  background: linear-gradient(90deg, transparent, var(--neon-35) 12%, var(--neon-35) 88%, transparent);
}

.aside-note {
  padding-left: 18px;
  border-left: 1px solid var(--c-rule);
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

.band--deep .aside-note,
.band--night .aside-note {
  border-left-color: var(--neon-35);
  color: var(--paper-55);
}

/* ---------- 05 按钮 / 标签 / 面包屑 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  text-align: center;
  transition: background-color 180ms var(--ease), color 180ms var(--ease),
    border-color 180ms var(--ease), transform 180ms var(--ease);
}

.btn-primary {
  background-color: var(--c-amber);
  color: #241005;
}
.btn-primary:hover { background-color: #FFA15F; transform: translateY(-2px); }

.btn-ghost {
  background-color: transparent;
  color: var(--c-paper);
  border-color: var(--paper-12);
}
.btn-ghost:hover { border-color: var(--c-neon); color: var(--c-neon); }

.btn-outline {
  background-color: transparent;
  color: var(--c-deep);
  border-color: rgba(11, 15, 26, 0.24);
}
.btn-outline:hover { border-color: var(--c-deep); background-color: rgba(10, 22, 51, 0.06); }

.btn-block { display: flex; width: 100%; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--c-rule);
  border-radius: 2px;
  background-color: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.chip:hover { color: var(--c-deep); border-color: var(--c-deep); }

.chip[aria-pressed="true"] {
  background-color: var(--c-neon);
  border-color: var(--c-neon);
  color: var(--c-deep);
}

.chip--on-dark {
  border-color: var(--paper-12);
  color: var(--paper-60);
}
.chip--on-dark:hover { color: var(--c-paper); border-color: var(--c-neon); }
.chip--on-dark[aria-pressed="true"] {
  background-color: transparent;
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-items {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
  margin-top: clamp(24px, 3vw, 36px);
}

[data-tags][data-hidden] { display: none; }

.crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.crumbs-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.crumbs-list li + li::before {
  content: "/";
  color: var(--c-rule);
}

.crumbs a:hover { color: var(--c-neon-ink); }
.band--deep .crumbs,
.band--night .crumbs { color: var(--paper-55); }
.band--deep .crumbs-list li + li::before,
.band--night .crumbs-list li + li::before { color: var(--neon-35); }
.band--deep .crumbs a:hover,
.band--night .crumbs a:hover { color: var(--c-neon); }

/* ---------- 06 图片容器 ---------- */
.figure-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--neon-18);
  border-radius: var(--radius);
  background-color: var(--c-night);
  background-image:
    linear-gradient(rgba(53, 230, 210, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 230, 210, 0.14) 1px, transparent 1px);
  background-size: 48px 48px;
}

.figure-frame::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 18%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-amber), transparent);
  transform: rotate(-8deg);
  opacity: 0.7;
  pointer-events: none;
}

.figure-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.figure-frame--wide { aspect-ratio: 21 / 9; }
.figure-frame--tall { aspect-ratio: 3 / 4; }
.figure-frame--square { aspect-ratio: 1 / 1; }
.figure-frame--soft {
  background-image: linear-gradient(160deg, var(--c-night), var(--c-deep));
}

.figure-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

.band--deep .figure-caption,
.band--night .figure-caption { color: var(--paper-55); }

/* ---------- 07 头部 ---------- */
.pg-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 12px 18px;
  border-radius: 2px;
  background-color: var(--c-neon);
  color: var(--c-deep);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transform: translateY(-180%);
  transition: transform 180ms var(--ease);
}

.pg-skip:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  color: var(--c-paper);
  border-bottom: 1px solid transparent;
  background-image: linear-gradient(
    180deg,
    rgba(10, 22, 51, 0.94) 0%,
    rgba(10, 22, 51, 0.58) 58%,
    rgba(10, 22, 51, 0) 100%
  );
  transition: background-color 220ms var(--ease), border-color 220ms var(--ease),
    box-shadow 220ms var(--ease);
}

.site-header[data-state="solid"] {
  background-color: var(--c-deep);
  background-image: none;
  border-bottom-color: var(--neon-18);
  box-shadow: 0 24px 50px -40px rgba(0, 0, 0, 0.95);
}

.header-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(16px, 2vw, 40px);
  transition: min-height 220ms var(--ease);
}

.site-header[data-state="solid"] .header-inner { min-height: 66px; }

.brand-lockup {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 2px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-deep);
  background-image: linear-gradient(140deg, var(--c-neon), #7FF3E6 55%, var(--c-mint));
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--c-paper);
  white-space: nowrap;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.18em;
  color: var(--c-neon);
  white-space: nowrap;
}

.primary-nav { justify-self: center; min-width: 0; }

.nav-caption { display: none; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 22px);
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 10px 4px 12px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper-60);
  white-space: nowrap;
  transition: color 180ms var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--neon-35);
  transition: color 180ms var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  bottom: 3px;
  height: 2px;
  background-color: var(--c-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.nav-link:hover { color: var(--c-paper); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--c-paper); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] .nav-index { color: var(--c-amber); }

.nav-foot { display: none; }
.nav-note { display: none; }

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-search {
  padding: 9px 12px;
  border: 1px dashed var(--neon-35);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.14em;
  color: var(--paper-60);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.header-search:hover { color: var(--c-neon); border-color: var(--c-neon); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 11px 14px;
  border: 1px solid var(--neon-35);
  border-radius: var(--radius);
  color: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.14em;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  flex: none;
  width: 18px;
  height: 10px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background-color: var(--c-neon);
  transition: transform 200ms var(--ease), top 200ms var(--ease);
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 4px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 4px;
  transform: rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-image: linear-gradient(90deg, var(--c-neon), var(--c-violet) 62%, var(--c-amber));
  transform: scaleX(0);
  transform-origin: 0 50%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease);
}

.site-header[data-state="solid"] .scroll-progress { opacity: 1; }

/* ---------- 08 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--c-deep);
  color: var(--paper-80);
  border-top: 1px solid var(--neon-18);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(53, 230, 210, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 230, 210, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.55;
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(56px, 7vw, 96px) var(--gutter) clamp(28px, 3vw, 40px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(32px, 5vw, 72px);
}

.footer-brand { min-width: 0; }

.brand-lockup--footer { padding: 0; }

.footer-summary {
  margin-top: 24px;
  max-width: 38ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-60);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-group-title {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.18em;
  color: var(--c-neon);
}

.footer-list { display: grid; gap: 12px; }

.footer-list a {
  display: inline-block;
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper-60);
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.footer-list a:hover {
  color: var(--c-paper);
  border-bottom-color: var(--c-neon);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px 32px;
  margin-top: clamp(40px, 5vw, 72px);
  padding-top: 28px;
  border-top: 1px solid var(--paper-12);
}

.contact-item { display: grid; gap: 8px; align-content: start; }

.contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.16em;
  color: var(--c-violet);
}

.contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--paper-80);
  word-break: break-word;
}

.contact-note {
  grid-column: 1 / -1;
  max-width: 74ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--paper-55);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 32px;
  margin-top: clamp(32px, 4vw, 52px);
  padding-top: 20px;
  border-top: 1px solid var(--paper-12);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--paper-55);
}

.footer-icp { color: var(--paper-55); }

/* ---------- 09 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

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

[data-appear="yes"] {
  animation: pg-item-in 160ms var(--ease) both;
}

@keyframes pg-item-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

body.is-locked { overflow: hidden; }

/* ---------- 10 响应式 ---------- */
@media (max-width: 1200px) {
  .header-search { display: none; }
}

@media (max-width: 1024px) {
  .site-header {
    background-color: rgba(10, 22, 51, 0.94);
    background-image: none;
    border-bottom-color: var(--neon-18);
  }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 72px;
  }

  .site-header[data-state="solid"] .header-inner { min-height: 66px; }

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

  .brand-tagline { display: none; }

  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 130;
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: min(370px, 88vw);
    padding: 104px 26px 40px;
    overflow-y: auto;
    background-color: var(--c-night);
    border-left: 1px solid var(--neon-35);
    box-shadow: -30px 0 60px -40px rgba(0, 0, 0, 0.95);
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 260ms var(--ease), visibility 260ms var(--ease);
  }

  .primary-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-caption {
    display: block;
    margin-bottom: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1;
    letter-spacing: 0.2em;
    color: var(--c-neon);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item { border-bottom: 1px solid var(--paper-12); }

  .nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 16px 4px;
    font-size: 17px;
    color: var(--paper-80);
  }

  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { color: var(--c-neon); }

  .nav-foot { display: block; margin-top: 26px; }

  .nav-note {
    display: block;
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    letter-spacing: 0.06em;
    color: var(--paper-55);
  }

  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-12 {
    grid-column: span 6;
  }
}

@media (max-width: 700px) {
  body { font-size: 16px; }
  .footer-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-summary { max-width: none; }
}

@media (max-width: 560px) {
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-12 {
    grid-column: 1 / -1;
  }

  .brand-mark { width: 34px; height: 34px; font-size: 13px; }
  .brand-name { font-size: 17px; }
  .nav-toggle-text { display: none; }
  .header-actions { gap: 10px; }
  .btn { padding: 11px 16px; font-size: 14px; }
  .footer-legal { justify-content: flex-start; }
}

/* ---------- 11 无障碍降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .scroll-progress { transition: none; }
}