:root {
  --c-space: #0A1E3C;
  --c-space-deep: #06132A;
  --c-neon: #00E68A;
  --c-neon-soft: rgba(0, 230, 138, 0.15);
  --c-orange: #FF5A36;
  --c-orange-soft: rgba(255, 90, 54, 0.12);
  --c-light: #F4F7F9;
  --c-ink: #1E2A38;
  --c-muted: #5A6B7A;
  --c-line: #D0DCE4;
  --c-white: #FFFFFF;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --container: 1200px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 76px;
  --radius-sm: 6px;
  --radius-md: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-float: 0 8px 30px rgba(6, 19, 42, 0.12);
  --shadow-space: 0 12px 40px rgba(6, 19, 42, 0.28);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-ink);
  background: var(--c-light);
}

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

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

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

p { margin: 0; }

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

:focus-visible {
  outline: 3px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--c-neon); color: var(--c-space); }

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 300;
  padding: 0.75rem 1.25rem;
  background: var(--c-space);
  color: var(--c-white);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top 0.2s var(--ease);
}

.skip-link:focus { top: 0.75rem; }

/* ===== 头部 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--header-h);
  display: flex;
  align-items: center;
  pointer-events: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--c-neon), var(--c-orange));
  z-index: 260;
  border-radius: 0 2px 2px 0;
  pointer-events: none;
}

.header-inner {
  pointer-events: auto;
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  height: 60px;
  padding: 0 0.75rem 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: rgba(244, 247, 249, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  box-shadow: var(--shadow-float);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  color: var(--c-ink);
  transition: opacity 0.2s ease;
}

.brand-logo:hover { opacity: 0.85; }

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--c-space) 0%, var(--c-space) 52%, var(--c-neon) 52%, var(--c-neon) 55%, var(--c-space) 55%, var(--c-space) 78%, var(--c-orange) 78%);
  border-radius: 10px 4px 10px 4px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--c-white);
  text-shadow: 0 1px 2px rgba(6, 19, 42, 0.6);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--c-space);
  letter-spacing: 0.02em;
}

.logo-en {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  color: var(--c-ink);
  border-radius: 999px;
  position: relative;
  white-space: nowrap;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  transform: translateX(-50%) skewX(-20deg);
  width: 16px;
  height: 3px;
  background: var(--c-neon);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.2s var(--ease), width 0.2s var(--ease);
}

.nav-link:hover { background: var(--c-neon-soft); color: var(--c-space); }

.nav-link:hover::after,
.nav-link[aria-current="page"]::after { opacity: 1; width: 22px; }

.nav-link[aria-current="page"] {
  background: var(--c-neon-soft);
  color: var(--c-space);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.btn-header-cta { white-space: nowrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--c-space);
  background: var(--c-neon);
  box-shadow: 0 6px 20px rgba(0, 230, 138, 0.3);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0, 230, 138, 0.4); }

.btn:active { transform: translateY(0); }

.btn-primary { background: var(--c-neon); color: var(--c-space); }

.btn-outline {
  background: transparent;
  color: var(--c-space);
  box-shadow: inset 0 0 0 2px var(--c-space);
}

.btn-outline:hover { background: var(--c-space); color: var(--c-white); box-shadow: inset 0 0 0 2px var(--c-space); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: var(--c-white);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.4);
}

.btn-ghost:hover { background: var(--c-neon); color: var(--c-space); box-shadow: inset 0 0 0 2px var(--c-neon); }

.btn-small { padding: 0.55rem 1.05rem; font-size: 0.82rem; }

.nav-toggle { display: none; }

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-space);
  border-radius: 2px;
  position: relative;
  transition: transform 0.3s var(--ease), opacity 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before { top: -7px; }
.nav-toggle-icon::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { transform: translateY(7px) rotate(45deg); background: var(--c-neon); }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { transform: translateY(-7px) rotate(-45deg); background: var(--c-neon); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-space);
  color: rgba(255, 255, 255, 0.85);
  padding: 4rem 0 2rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--c-neon) 0%, var(--c-neon) 35%, var(--c-space) 35%, var(--c-space) 55%, var(--c-orange) 55%, var(--c-orange) 62%, var(--c-space) 62%);
}

.footer-inner {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.9fr 1.1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.brand-logo--footer {
  color: var(--c-white);
  margin-bottom: 1rem;
}

.brand-logo--footer .logo-text { color: var(--c-white); }
.brand-logo--footer .logo-en { color: rgba(255, 255, 255, 0.6); }

.footer-trust {
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.66);
  max-width: 34ch;
  border-left: 3px solid var(--c-neon);
  padding-left: 1rem;
}

.footer-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--c-white);
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.footer-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--c-neon);
  background: rgba(0, 230, 138, 0.12);
  border-radius: 4px;
  padding: 0.2rem 0.45rem;
}

.footer-links,
.footer-contact {
  display: grid;
  gap: 0.45rem;
}

.footer-links a,
.footer-contact a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover,
.footer-contact a:hover { color: var(--c-neon); padding-left: 4px; }

.footer-contact {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.875rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-copy { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.05em; }

.footer-icp {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.footer-icp a { color: rgba(255, 255, 255, 0.7); transition: color 0.2s; }

.footer-icp a:hover { color: var(--c-neon); }

.footer-dot { opacity: 0.4; }

.footer-legal { flex-basis: 100%; color: rgba(255, 255, 255, 0.4); font-size: 0.775rem; border-top: 1px solid rgba(255, 255, 255, 0.08); padding-top: 0.75rem; }

/* ===== 通用标题与索引 ===== */
.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-neon);
  background: var(--c-space);
  display: inline-block;
  padding: 0.35rem 0.8rem;
  border-radius: 4px;
  margin-right: 0.75rem;
  vertical-align: middle;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.2;
  color: var(--c-space);
  letter-spacing: 0.01em;
  margin: 0 0 0.75rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.section-title .small { font-size: 0.6em; font-weight: 500; color: var(--c-muted); margin-left: 0.5rem; }

.section-sub {
  font-size: 1rem;
  color: var(--c-muted);
  max-width: 60ch;
  margin: 0 0 2rem;
}

/* ===== 斜切分割线 ===== */
.slant-divider {
  width: 100%;
  height: 8px;
  background: linear-gradient(135deg, var(--c-neon) 0%, var(--c-neon) 25%, transparent 25%, transparent 50%, var(--c-orange) 50%, var(--c-orange) 55%, transparent 55%);
  border-radius: 4px;
  margin: 2rem 0;
}

/* ===== 内容容器 ===== */
.content-shell {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  padding-top: calc(var(--header-h) + 1rem);
  padding-bottom: 3rem;
}

.content-panel {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  margin-bottom: 2rem;
  box-shadow: 0 2px 12px rgba(6, 19, 42, 0.04);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a { color: var(--c-muted); }

.breadcrumb a:hover { color: var(--c-space); }

.breadcrumb .sep { color: var(--c-neon); }

.breadcrumb .current { color: var(--c-space); font-weight: 600; }

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--c-line);
  color: var(--c-muted);
  white-space: nowrap;
}

.tag--hot { background: var(--c-orange-soft); color: var(--c-orange); }

.tag--update { background: var(--c-neon-soft); color: #007A47; }

.tag--plain { background: var(--c-light); color: var(--c-muted); }

/* ===== 数据说明 ===== */
.data-note {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-muted);
  background: var(--c-light);
  border-left: 4px solid var(--c-space);
  padding: 0.6rem 0.9rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: inline-block;
}

.data-note strong { color: var(--c-space); font-weight: 700; }

/* ===== 列表：新闻与文章 ===== */
.news-list { display: grid; gap: 0; }

.news-item {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1.1rem 0.5rem;
  border-bottom: 1px solid var(--c-line);
  transition: background 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.news-item:last-child { border-bottom: none; }

.news-item:hover { background: var(--c-neon-soft); padding-left: 0.8rem; }

.news-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--c-muted);
  background: var(--c-light);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  text-align: center;
}

.news-title { font-size: 0.95rem; font-weight: 700; color: var(--c-space); line-height: 1.4; }

.news-title a:hover { color: #007A47; }

.news-meta { font-size: 0.78rem; color: var(--c-muted); }

/* ===== 应用列表 ===== */
.app-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 2rem; }

.app-item {
  border-radius: var(--radius-md);
  background: var(--c-white);
  border: 1px solid var(--c-line);
  padding: 1.6rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.app-item::before {
  content: "";
  position: absolute;
  top: -20px;
  right: -20px;
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, transparent 42%, var(--c-neon) 42%, var(--c-neon) 50%, var(--c-space) 50%, var(--c-space) 57%, transparent 57%);
  opacity: 0.28;
  transform: rotate(10deg);
}

.app-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-float); }

.app-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-orange);
  font-weight: 600;
}

.app-name { font-family: var(--font-display); font-weight: 900; font-size: 1.15rem; color: var(--c-space); margin: 0.35rem 0 0.4rem; }

.app-desc { font-size: 0.85rem; color: var(--c-muted); line-height: 1.6; max-width: 40ch; }

/* ===== FAQ ===== */
.faq-list { display: grid; gap: 0.75rem; }

.faq-item {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item[data-open] { border-color: var(--c-neon); box-shadow: 0 6px 18px rgba(0, 230, 138, 0.1); }

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-space);
  background: transparent;
}

.faq-question:hover { background: var(--c-light); }

.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  position: relative;
  border-radius: 50%;
  background: var(--c-neon-soft);
  transition: background 0.2s;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--c-space);
  transform: translate(-50%, -50%);
}

.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }

.faq-item[data-open] .faq-icon { background: var(--c-neon); }

.faq-item[data-open] .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); opacity: 0.6; }

.faq-answer {
  padding: 0 1.25rem 1.1rem;
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.7;
}

/* ===== 重点说明 ===== */
.callout {
  background: var(--c-light);
  border-left: 4px solid var(--c-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.callout-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--c-space);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.callout-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--c-orange);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
}

.callout p { font-size: 0.875rem; color: var(--c-muted); }

/* ===== 图片容器基础规则 ===== */
.image-shell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--c-space) 0%, var(--c-space) 40%, var(--c-neon) 40%, var(--c-neon) 52%, transparent 52%, transparent 75%, var(--c-orange) 75%, var(--c-orange) 80%, transparent 80%),
    linear-gradient(90deg, var(--c-space-deep), var(--c-space));
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.image-shell::after {
  content: "IMAGE / 待填充";
  padding: 2rem;
  text-align: center;
}

.image-shell--16x9 { aspect-ratio: 16 / 9; width: 100%; }
.image-shell--4x3 { aspect-ratio: 4 / 3; width: 100%; }
.image-shell--1x1 { aspect-ratio: 1 / 1; width: 100%; }

/* ===== 滚动渐入 ===== */
[data-enter] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

[data-enter].is-entered {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 150;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--c-space);
  color: var(--c-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-space);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
}

.back-to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: translateY(0); }

.back-to-top:hover { background: var(--c-neon); color: var(--c-space); }

.back-to-top svg { width: 22px; height: 22px; }

/* ===== 响应式 ===== */
@media (min-width: 901px) {
  .nav-toggle { display: none; }
}

@media (max-width: 900px) {
  .header-inner { height: 56px; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--c-light);
    border: 1px solid var(--c-line);
  }

  .btn-header-cta { display: none; }

  .site-nav {
    position: fixed;
    top: calc(var(--header-h) + 8px);
    left: 1rem;
    right: 1rem;
    background: var(--c-white);
    border-radius: 18px;
    border: 1px solid var(--c-line);
    box-shadow: var(--shadow-space);
    padding: 0.75rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px) scale(0.98);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
    z-index: 250;
    margin-left: 0;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .nav-link {
    justify-content: space-between;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    font-size: 1rem;
  }

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

  .nav-link[aria-current="page"] { background: var(--c-neon-soft); }

  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }

  .footer-brand-col { grid-column: 1 / -1; }

  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 0.5rem; }

  .app-list { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .header-inner { width: calc(100% - 1rem); }

  .logo-text { font-size: 0.9rem; }
  .logo-en { display: none; }

  .logo-mark { width: 36px; height: 36px; font-size: 0.75rem; }

  .site-nav { top: calc(var(--header-h) + 4px); left: 0.5rem; right: 0.5rem; }

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

  .footer-bottom { font-size: 0.75rem; }

  .news-item { grid-template-columns: 1fr; gap: 0.4rem; }

  .news-date { justify-self: start; }

  .news-item { grid-template-columns: 76px 1fr; }
  .news-item .tag { grid-column: 1 / -1; }

  .app-list { grid-template-columns: 1fr; }

  .section-title { flex-direction: column; align-items: flex-start; gap: 0.4rem; }

  .content-shell { padding-top: calc(var(--header-h) + 0.5rem); }

  .back-to-top { right: 1rem; bottom: 1rem; width: 44px; height: 44px; }
}

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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

  .back-to-top { transition: none; }
}