/* =========================================================
   TPG电玩 / site.css
   reset · tokens · typography · layout · shared components
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--void);
}

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

button { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }

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

a { color: inherit; }

hr { border: 0; border-top: 1px solid var(--edge-soft); margin: 0; }

/* ---------- tokens ---------- */
:root {
  --void: #070B1E;
  --deep-1: #0E1533;
  --deep-2: #16204A;
  --cyan: #22E0D6;
  --violet: #7B5BFF;
  --orange: #FF8A3D;
  --ink: #E8ECFF;
  --mute: #A6B0D8;
  --edge: rgba(34, 224, 214, .18);
  --edge-soft: rgba(166, 176, 216, .12);
  --on-accent: #051024;

  --shell: min(1280px, 92vw);
  --header-h: 74px;
  --header-h-solid: 62px;
  --dock-h: 62px;

  --r-lg: 22px;
  --r-md: 14px;
  --r-sm: 9px;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system,
    "Segoe UI", Roboto, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* 高对比模式：抬升辅助文字与边界，压低玻璃透明度 */
html.is-contrast {
  --mute: #D8DEF6;
  --edge: rgba(34, 224, 214, .48);
  --edge-soft: rgba(200, 210, 240, .3);
}

html.is-contrast body { background: #04060F; }

html.is-contrast .site-header.is-solid {
  background: rgba(6, 10, 28, .98);
}

html.is-contrast .panel--glass,
html.is-contrast .util-btn,
html.is-contrast .btn--ghost {
  background: rgba(10, 16, 40, .96);
}

/* ---------- 焦点与可访问 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 20px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--cyan), #6CF0E6);
  color: var(--on-accent);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .02em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform .25s var(--ease);
}

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

/* ---------- 排版 ---------- */
.display-1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 7.6vw, 96px);
  line-height: 1.02;
  letter-spacing: -.03em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -.025em;
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.24;
  letter-spacing: -.02em;
}

.lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.72;
  color: var(--mute);
  max-width: 52ch;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.mono {
  font-family: var(--font-mono);
  font-size: .82em;
  letter-spacing: .06em;
  color: var(--mute);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--edge);
  background: rgba(34, 224, 214, .08);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
}

.numeric-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(72px, 12vw, 200px);
  line-height: .84;
  letter-spacing: -.05em;
  background: linear-gradient(158deg, var(--cyan) 8%, #6FA9FF 46%, var(--violet) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 布局 ---------- */
.shell {
  width: var(--shell);
  margin-inline: auto;
}

.shell--narrow {
  width: min(820px, 92vw);
  margin-inline: auto;
}

.section {
  padding: clamp(56px, 9vw, 120px) 0;
}

.section--tight {
  padding: clamp(34px, 5vw, 66px) 0;
}

.section--deep {
  background: var(--deep-1);
  border-top: 1px solid var(--edge-soft);
  border-bottom: 1px solid var(--edge-soft);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 48px);
  max-width: 62ch;
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

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

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -.005em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease),
    background .22s var(--ease), border-color .22s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(118deg, var(--cyan) 0%, #63E9FF 44%, var(--violet) 100%);
  color: var(--on-accent);
  box-shadow: 0 14px 38px -18px rgba(34, 224, 214, .95);
}

.btn--accent {
  background: var(--orange);
  color: var(--on-accent);
  box-shadow: 0 12px 32px -18px rgba(255, 138, 61, .95);
}

.btn--ghost {
  background: rgba(22, 32, 74, .52);
  border-color: var(--edge);
  color: var(--ink);
}

.btn--ghost:hover { border-color: rgba(34, 224, 214, .55); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mute);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

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

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 9px;
  color: rgba(166, 176, 216, .45);
}

.breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

/* ---------- 正文 ---------- */
.prose {
  max-width: 62ch;
  color: var(--mute);
  line-height: 1.78;
}

.prose > * + * { margin-top: 1.35em; }

.prose h2 {
  margin-top: 2.1em;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink);
  line-height: 1.28;
}

.prose h3 {
  margin-top: 1.8em;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
}

.prose strong { color: var(--ink); font-weight: 700; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.prose ul, .prose ol { padding-left: 1.3em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .5em; }

/* ---------- 面板 / 折叠 / 分段 ---------- */
.panel {
  padding: clamp(20px, 2.6vw, 32px);
  border-radius: var(--r-lg);
  background: var(--deep-1);
  border: 1px solid var(--edge-soft);
}

.panel--glass {
  background: linear-gradient(150deg, rgba(22, 32, 74, .72), rgba(14, 21, 51, .52));
  border: 1px solid var(--edge);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: 0 24px 60px -34px rgba(0, 0, 0, .95);
}

.fold {
  border: 1px solid var(--edge-soft);
  border-radius: var(--r-md);
  background: rgba(14, 21, 51, .72);
  overflow: hidden;
}

.fold + .fold { margin-top: 12px; }

.fold > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: background .22s var(--ease);
}

.fold > summary::-webkit-details-marker { display: none; }
.fold > summary::marker { content: ""; }
.fold > summary:hover { background: rgba(34, 224, 214, .06); }

.fold > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.fold[open] > summary::after { content: "\2013"; }

.fold-body {
  padding: 0 20px 20px;
  color: var(--mute);
  font-size: 15px;
}

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(22, 32, 74, .62);
  border: 1px solid var(--edge);
}

.segmented-btn {
  padding: 9px 18px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--mute);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -.005em;
  cursor: pointer;
  transition: color .22s var(--ease), background .22s var(--ease);
}

.segmented-btn:hover { color: var(--ink); }

.segmented-btn[aria-selected="true"] {
  background: linear-gradient(120deg, var(--cyan), #74EDE4 60%, var(--violet));
  color: var(--on-accent);
  box-shadow: 0 10px 30px -18px rgba(34, 224, 214, .95);
}

/* ---------- 图片容器基础规则 ---------- */
.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--edge);
  background:
    radial-gradient(120% 120% at 12% 0%, rgba(34, 224, 214, .22), transparent 58%),
    radial-gradient(110% 110% at 96% 100%, rgba(123, 91, 255, .28), transparent 60%),
    var(--deep-2);
}

.figure-frame[data-ratio="16x9"] { aspect-ratio: 16 / 9; }
.figure-frame[data-ratio="4x3"] { aspect-ratio: 4 / 3; }
.figure-frame[data-ratio="1x1"] { aspect-ratio: 1 / 1; }
.figure-frame[data-ratio="3x4"] { aspect-ratio: 3 / 4; }

.figure-frame img,
.figure-frame > .figure-fill {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--mute);
}

/* ---------- 显现 ---------- */
[data-reveal] { opacity: 1; transform: none; }

html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .72s var(--ease), transform .72s var(--ease);
  will-change: opacity, transform;
}

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

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  border-bottom: 1px solid transparent;
  transition: background .34s var(--ease), border-color .34s var(--ease),
    box-shadow .34s var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 11, 30, .88), rgba(7, 11, 30, 0));
  opacity: 1;
  transition: opacity .34s var(--ease);
}

.site-header.is-solid {
  background: rgba(14, 21, 51, .94);
  border-bottom-color: var(--edge);
  box-shadow: 0 18px 46px -34px rgba(0, 0, 0, 1);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}

.site-header.is-solid::before { opacity: 0; }

.header-bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  height: var(--header-h);
  transition: height .34s var(--ease);
}

.site-header.is-solid .header-bar { height: var(--header-h-solid); }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  position: relative;
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  box-shadow: 0 0 24px -4px rgba(34, 224, 214, .55);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border: 2px solid rgba(5, 16, 36, .9);
  border-top-color: transparent;
  border-radius: 4px;
  transform: rotate(45deg);
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.brand-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  line-height: 1.5;
  color: var(--mute);
}

/* 主导航（桌面） */
.primary-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list a {
  display: block;
  padding: 9px 13px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--mute);
  text-decoration: none;
  transition: color .24s var(--ease), background .24s var(--ease),
    box-shadow .24s var(--ease);
}

.nav-list a:hover {
  color: var(--ink);
  background: rgba(34, 224, 214, .09);
}

.nav-list a[aria-current="page"] {
  color: var(--on-accent);
  background: linear-gradient(120deg, var(--cyan), #74EDE4);
  box-shadow: 0 0 0 1px rgba(34, 224, 214, .45),
    0 10px 26px -16px rgba(34, 224, 214, 1);
}

.nav-foot { display: none; }

.nav-foot-note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
}

/* 工具区 */
.header-utility {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}

.util-btn {
  padding: 8px 13px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: rgba(22, 32, 74, .58);
  color: var(--mute);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color .24s var(--ease), border-color .24s var(--ease),
    background .24s var(--ease);
}

.util-btn:hover {
  color: var(--ink);
  border-color: rgba(34, 224, 214, .5);
}

.util-btn[aria-pressed="true"] {
  color: var(--on-accent);
  background: var(--cyan);
  border-color: var(--cyan);
}

.util-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 17px;
  border-radius: 999px;
  background: var(--orange);
  color: var(--on-accent);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: .01em;
  text-decoration: none;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
  box-shadow: 0 10px 28px -18px rgba(255, 138, 61, .95);
}

.util-cta:hover { transform: translateY(-2px); }

/* 菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: rgba(22, 32, 74, .58);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background .24s var(--ease);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .28s var(--ease), top .28s var(--ease);
}

.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { top: 0; transform: rotate(-45deg); }

/* 滚动进度光带 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 3;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 62%, var(--orange));
}

/* 小屏底部固定分类栏 */
.mobile-dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: none;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 2px;
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px));
  background: rgba(10, 16, 40, .96);
  border-top: 1px solid var(--edge);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.dock-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 7px 1px;
  border-radius: 10px;
  color: var(--mute);
  font-size: clamp(9.5px, 2.6vw, 11.5px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.03em;
  text-align: center;
  text-decoration: none;
  transition: color .22s var(--ease), background .22s var(--ease);
}

.dock-link::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: .45;
}

.dock-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(34, 224, 214, .1);
}

.dock-link[aria-current="page"]::before {
  opacity: 1;
  box-shadow: 0 0 10px var(--cyan);
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  margin-top: clamp(56px, 8vw, 110px);
  padding: clamp(44px, 6.5vw, 86px) 0 26px;
  background: linear-gradient(180deg, var(--deep-1) 0%, var(--void) 72%);
  border-top: 1px solid var(--edge);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(210px, 1.3fr) minmax(300px, 2fr) minmax(230px, 1.35fr);
  gap: clamp(26px, 4vw, 56px);
}

.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }

.footer-note {
  max-width: 28ch;
  color: var(--mute);
  font-size: 14.5px;
  line-height: 1.7;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 30px);
}

.footer-col h3,
.footer-contact h3 {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-col li + li { margin-top: 9px; }

.footer-col a {
  color: var(--mute);
  font-size: 14.5px;
  text-decoration: none;
  transition: color .2s var(--ease);
}

.footer-col a:hover { color: var(--ink); }

.contact-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--edge-soft);
  font-size: 14px;
}

.contact-list li:last-child { border-bottom: 0; }

.contact-key {
  flex: none;
  width: 3em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mute);
  padding-top: 2px;
}

.contact-val {
  flex: 1 1 12ch;
  color: var(--ink);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(32px, 4vw, 54px);
  padding-top: 20px;
  border-top: 1px solid var(--edge-soft);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
}

.footer-hint {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: rgba(166, 176, 216, .78);
  max-width: 56ch;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1023px) {
  body { padding-bottom: calc(var(--dock-h) + env(safe-area-inset-bottom, 0px)); }

  .mobile-dock { display: grid; }

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

  .header-utility { margin-left: auto; }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    margin: 0;
    padding: calc(var(--header-h) + 26px) clamp(18px, 6vw, 44px)
      calc(var(--dock-h) + 40px);
    overflow-y: auto;
    background:
      radial-gradient(120% 70% at 84% 0%, rgba(123, 91, 255, .24), transparent 62%),
      radial-gradient(100% 60% at 6% 100%, rgba(34, 224, 214, .14), transparent 60%),
      rgba(7, 11, 30, .985);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-14px);
    transition: opacity .3s var(--ease), transform .3s var(--ease),
      visibility .3s linear;
  }

  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-list a {
    padding: 15px 18px;
    border-radius: var(--r-md);
    font-size: 17px;
    background: rgba(22, 32, 74, .42);
  }

  .nav-list a[aria-current="page"] { background: linear-gradient(120deg, var(--cyan), #74EDE4); }

  .nav-foot {
    display: block;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--edge);
  }
}

body.nav-open { overflow: hidden; }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .util-cta { display: none; }
}

@media (max-width: 640px) {
  :root { --header-h: 64px; --header-h-solid: 58px; }

  .brand-tag { display: none; }

  .numeric-display { font-size: clamp(48px, 18vw, 96px); }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .segmented { border-radius: var(--r-md); }
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .site-header.is-solid { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .panel--glass { backdrop-filter: none; -webkit-backdrop-filter: none; }
}