/* ============================================================
   /assets/site.css — 爱游戏赛场 共享外壳
   深空蓝控制台：reset / tokens / 中文排版 / 头部 / 页脚 / 组件
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

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

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

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

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

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

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

/* ---------- 2. tokens ---------- */
:root {
  --ink-900: #06101F;
  --ink-800: #0B1E3A;
  --ink-700: #0E3540;
  --cyan: #29F0D4;
  --cyan-deep: #007A6E;
  --orange: #FF7A1A;
  --white: #F4F8FF;
  --mist: #93A8C4;
  --violet: #2B1B5A;
  --wine: #4A1230;
  --paper: #E8FBF7;

  --line: rgba(147, 168, 196, 0.22);
  --line-soft: rgba(147, 168, 196, 0.12);
  --line-cyan: rgba(41, 240, 212, 0.45);

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 52px);

  --font-sans: "HarmonyOS Sans SC", "Noto Sans SC", "Source Han Sans SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui,
    -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, monospace;

  --r-s: 10px;
  --r-m: 18px;
  --r-l: 28px;

  --ease: cubic-bezier(0.65, 0.05, 0.2, 1);
}

/* ---------- 3. base ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 88% -12%, rgba(41, 240, 212, 0.11), transparent 62%),
    radial-gradient(820px 520px at -6% 22%, rgba(255, 122, 26, 0.07), transparent 66%),
    repeating-linear-gradient(90deg, rgba(147, 168, 196, 0.055) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(147, 168, 196, 0.04) 0 1px, transparent 1px 96px);
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

::selection { background: var(--cyan); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.8;
}

.display {
  font-size: clamp(34px, 6vw, 76px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.lede {
  font-size: clamp(15px, 1.5vw, 18px);
  color: rgba(244, 248, 255, 0.78);
  max-width: 52ch;
}

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose p { color: rgba(244, 248, 255, 0.8); }

/* ---------- 4. layout helpers ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--narrow { max-width: 900px; }

.section {
  padding-block: clamp(48px, 7vw, 96px);
  position: relative;
}

.section__rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line-cyan), rgba(147, 168, 196, 0.08) 60%, transparent);
}

.section-index {
  font-family: var(--font-mono);
  font-size: clamp(64px, 13vw, 160px);
  font-weight: 700;
  line-height: 0.8;
  color: var(--cyan);
  opacity: 0.14;
  letter-spacing: -0.03em;
  user-select: none;
}

.stack > * + * { margin-top: clamp(18px, 2.4vw, 30px); }

.grid { display: grid; gap: clamp(18px, 2.6vw, 32px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 5. buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background-color 0.16s var(--ease),
    border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.btn--orange {
  background: var(--orange);
  color: var(--ink-900);
  box-shadow: 0 14px 34px -16px rgba(255, 122, 26, 0.95);
}
.btn--orange:hover { background: #ff8f3f; transform: translateY(-2px); }

.btn--cyan {
  background: var(--cyan);
  color: var(--ink-900);
}
.btn--cyan:hover { background: #6ff8e5; transform: translateY(-2px); }

.btn--ghost {
  border-color: var(--line-cyan);
  color: var(--white);
  background: rgba(41, 240, 212, 0.06);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 6. skip link ---------- */
.skip-link {
  position: absolute;
  left: 18px;
  top: -120px;
  z-index: 99;
  padding: 12px 20px;
  border-radius: 0 0 12px 12px;
  background: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
  font-size: 14px;
  transition: top 0.16s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 7. header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background:
    linear-gradient(180deg, rgba(6, 16, 31, 0.99) 0%, rgba(6, 16, 31, 0.95) 100%);
  border-bottom: 1px solid var(--line);
}

/* 上层：品牌 / 状态 / 快捷通道 */
.topbar {
  position: relative;
  z-index: 4;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(90deg, rgba(11, 30, 58, 0.95) 0%, rgba(14, 53, 64, 0.72) 62%, rgba(11, 30, 58, 0.95) 100%);
}

.topbar__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
  min-height: 66px;
  padding-block: 10px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__glyph {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  width: 38px;
  height: 38px;
  padding: 7px;
  border: 1px solid var(--line-cyan);
  border-radius: 11px;
  background: linear-gradient(155deg, rgba(41, 240, 212, 0.22), rgba(41, 240, 212, 0));
  box-shadow: 0 0 20px -6px rgba(41, 240, 212, 0.55);
}

.brand__glyph i {
  display: block;
  width: 100%;
  background: var(--cyan);
  border-radius: 1px;
}
.brand__glyph i:nth-child(1) { height: 46%; }
.brand__glyph i:nth-child(2) { height: 100%; }
.brand__glyph i:nth-child(3) { height: 72%; }

.brand__text { display: flex; flex-direction: column; line-height: 1.25; }

.brand__name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--white);
}

.brand__suffix {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

.topbar__status {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(41, 240, 212, 0.6);
  animation: pulse 2.6s var(--ease) infinite;
  flex: 0 0 auto;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(41, 240, 212, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(41, 240, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(41, 240, 212, 0); }
}

.quick {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}

.quick__link {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(244, 248, 255, 0.82);
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease),
    background-color 0.16s var(--ease);
}

.quick__link:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(41, 240, 212, 0.08);
}

.quick__link--hot {
  border-color: rgba(255, 122, 26, 0.7);
  color: var(--orange);
  background: rgba(255, 122, 26, 0.1);
}
.quick__link--hot:hover {
  border-color: var(--orange);
  color: var(--ink-900);
  background: var(--orange);
}

/* 下层：栏目导航 */
.navbar {
  position: relative;
  z-index: 3;
}

.navbar__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 56px;
}

.primary-nav { flex: 1 1 auto; }

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

.nav-list__item { display: flex; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 14px 15px 18px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(244, 248, 255, 0.74);
  transition: color 0.16s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 8px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease);
}

.nav-link:hover { color: var(--white); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
  opacity: 0.75;
}

.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] .nav-link__idx { color: var(--cyan); opacity: 1; }

.navbar__meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--mist);
  white-space: nowrap;
}

.navbar__meta-k { color: var(--cyan); }
.navbar__meta-v { color: rgba(147, 168, 196, 0.85); }

/* 折叠按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line-cyan);
  border-radius: 12px;
  background: rgba(41, 240, 212, 0.08);
  color: var(--white);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  cursor: pointer;
  position: relative;
  z-index: 5;
  transition: border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); background: rgba(41, 240, 212, 0.16); }

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.18s var(--ease);
}

.site-header[data-open="true"] .nav-toggle__bars i:first-child {
  transform: translateY(3px) rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle__bars i:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* 遮罩与抽屉（移动端） */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(6, 16, 31, 0.74);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
}

/* 阅读进度 */
.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  z-index: 6;
  background: rgba(147, 168, 196, 0.13);
  pointer-events: none;
}

.progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  box-shadow: 0 0 12px rgba(41, 240, 212, 0.65);
}

/* ---------- 8. footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(60px, 9vw, 120px);
  padding-block: clamp(44px, 6vw, 80px) 26px;
  border-top: 1px solid var(--line-cyan);
  background:
    radial-gradient(900px 420px at 10% 0%, rgba(41, 240, 212, 0.12), transparent 62%),
    radial-gradient(760px 420px at 94% 8%, rgba(43, 27, 90, 0.6), transparent 66%),
    linear-gradient(180deg, #0B1E3A 0%, #06101F 72%);
  color: var(--white);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1.25fr) minmax(0, 1.9fr) minmax(250px, 1.15fr);
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.footer-brand__line {
  margin-top: 20px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.footer-brand__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 248, 255, 0.66);
  max-width: 34ch;
}

.footer-brand__sync {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding: 6px 14px;
  border: 1px dashed var(--line-cyan);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.footer-brand__sync .mono { color: var(--mist); }

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

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-col__list li + li { margin-top: 10px; }

.footer-link {
  display: inline-flex;
  align-items: center;
  font-size: 14.5px;
  color: rgba(244, 248, 255, 0.76);
  transition: color 0.16s var(--ease);
}

.footer-link::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 1px;
  margin-right: 9px;
  background: var(--mist);
  transition: width 0.18s var(--ease), background-color 0.18s var(--ease);
}

.footer-link:hover { color: var(--cyan); }
.footer-link:hover::before { width: 20px; background: var(--cyan); }

.footer-contact {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(160deg, rgba(14, 53, 64, 0.72), rgba(11, 30, 58, 0.5));
}

.footer-contact__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
}

.contact-line {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.6;
}
.contact-line + .contact-line { margin-top: 12px; }

.contact-line__k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding-top: 3px;
}

.contact-line__v {
  color: rgba(244, 248, 255, 0.88);
  word-break: break-word;
}

.copy-btn {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 9px;
  border: 1px solid var(--line-cyan);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  cursor: pointer;
  vertical-align: 1px;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease);
}
.copy-btn:hover { background: rgba(41, 240, 212, 0.16); }
.copy-btn[data-copied="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  margin-top: clamp(32px, 5vw, 58px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer-legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.footer-note {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(147, 168, 196, 0.85);
  max-width: 58ch;
}

.to-top {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.to-top:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 9. 通用内容组件 ---------- */
.breadcrumbs { padding-block: 22px 0; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

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

.breadcrumbs__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(147, 168, 196, 0.45);
}

.breadcrumbs a { color: rgba(244, 248, 255, 0.7); }
.breadcrumbs a:hover { color: var(--cyan); }

.page-head {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  padding-block: clamp(28px, 4vw, 56px) clamp(24px, 3vw, 40px);
}

.panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(165deg, rgba(14, 53, 64, 0.66), rgba(6, 16, 31, 0.7));
}

.card {
  position: relative;
  display: block;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(160deg, rgba(11, 30, 58, 0.86), rgba(6, 16, 31, 0.72));
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.card:hover {
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px rgba(41, 240, 212, 0.35);
  transform: translateY(-2px);
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--line-cyan);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.data-bar {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(147, 168, 196, 0.16);
  overflow: hidden;
}

.data-bar__fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), rgba(41, 240, 212, 0.45));
  transition: width 0.7s var(--ease);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line-cyan), transparent);
}

/* 图片容器基础规则（无外部资源，仅容器） */
.media-frame {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background:
    radial-gradient(120% 90% at 18% 8%, rgba(41, 240, 212, 0.28), transparent 58%),
    linear-gradient(155deg, var(--ink-700) 0%, var(--ink-800) 58%, var(--violet) 100%);
}

.media-frame img,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(41, 240, 212, 0.09) 0 1px,
    transparent 1px 4px
  );
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 16, 31, 0) 42%, rgba(6, 16, 31, 0.72));
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wine {
  background:
    radial-gradient(120% 90% at 20% 10%, rgba(255, 122, 26, 0.24), transparent 58%),
    linear-gradient(155deg, var(--wine) 0%, var(--ink-800) 70%);
}
.media-frame--violet {
  background:
    radial-gradient(120% 90% at 20% 10%, rgba(41, 240, 212, 0.24), transparent 58%),
    linear-gradient(155deg, var(--violet) 0%, var(--ink-800) 70%);
}

/* ---------- 10. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .navbar__meta { display: none; }
  .footer-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 130px; }

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

  .primary-nav {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 2;
    width: min(88vw, 340px);
    padding: 132px 18px 40px;
    overflow-y: auto;
    border-right: 1px solid var(--line-cyan);
    background:
      radial-gradient(600px 420px at 0% 0%, rgba(41, 240, 212, 0.16), transparent 62%),
      repeating-linear-gradient(0deg, rgba(147, 168, 196, 0.05) 0 1px, transparent 1px 72px),
      linear-gradient(180deg, #0B1E3A 0%, #06101F 80%);
    transform: translateX(-102%);
    transition: transform 0.24s var(--ease);
  }

  .site-header[data-open="true"] .primary-nav { transform: none; }
  .site-header[data-open="true"] .nav-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  body.nav-open { overflow: hidden; }

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

  .nav-link {
    display: flex;
    align-items: center;
    padding: 16px 12px;
    font-size: 17px;
    border-bottom: 1px solid var(--line-soft);
  }

  .nav-link::after { left: 12px; right: auto; bottom: 10px; width: 34px; }
  .nav-link[aria-current="page"] { background: rgba(41, 240, 212, 0.08); }

  .topbar__status { display: none; }
  .topbar__inner { min-height: 58px; gap: 12px; }
  .navbar__inner { min-height: 54px; }

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

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

@media (max-width: 760px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { padding: 18px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .quick li:nth-child(n + 2) { display: none; }
  .quick__link { padding: 5px 12px; font-size: 12px; }
  .brand__name { font-size: 16.5px; }
  .brand__suffix { font-size: 9.5px; letter-spacing: 0.1em; }
  .brand__glyph { width: 34px; height: 34px; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .contact-line { grid-template-columns: 56px minmax(0, 1fr); }
}

@media (max-width: 420px) {
  .brand__suffix { display: none; }
  .nav-toggle__label { display: none; }
}

/* ---------- 12. 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;
  }

  .dot { animation: none; box-shadow: 0 0 0 3px rgba(41, 240, 212, 0.22); }

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

  .nav-link:hover,
  .card:hover,
  .btn:hover { transform: none; }
}