/* ==========================================================================
   OD赛场 · 共享样式表 /assets/site.css
   技术蓝图网格 + 夜场战术追踪控制台
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

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

ul, ol { list-style: none; }

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

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B1F1A;
  --night: #0D1B2A;
  --slate: #1F3B44;
  --lime: #C8FF3D;
  --signal: #F5C542;
  --red: #E5484D;
  --white: #F4F7F2;
  --mist: #9DB2A8;
  --cyan: #5BC8E8;

  --line: rgba(244, 247, 242, 0.10);
  --line-strong: rgba(244, 247, 242, 0.22);
  --surface: rgba(31, 59, 68, 0.40);
  --surface-deep: rgba(13, 27, 42, 0.62);

  --font-display: "Barlow Condensed", "Roboto Condensed", "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", ui-monospace, Consolas, monospace;

  --shell: 1180px;
  --pad: clamp(16px, 4vw, 40px);
  --radius: 3px;
  --radius-lg: 10px;
  --dur: 220ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.012em;
  color: var(--white);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 8% -12%, rgba(91, 200, 232, 0.10), transparent 62%),
    radial-gradient(900px 520px at 92% 2%, rgba(200, 255, 61, 0.06), transparent 64%),
    linear-gradient(180deg, #0D1B2A 0%, #0B1F1A 36%);
  background-repeat: no-repeat;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.008em;
  color: var(--white);
}

h1 { font-size: clamp(34px, 6vw, 68px); }
h2 { font-size: clamp(28px, 3.6vw, 40px); }
h3 { font-size: clamp(21px, 2.2vw, 26px); letter-spacing: 0; }

p { text-wrap: pretty; }

strong { color: var(--white); font-weight: 700; }

::selection {
  background: var(--lime);
  color: #06210F;
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}

/* ---------- 4. 布局容器 ---------- */
.shell {
  width: min(100%, calc(var(--shell) + var(--pad) * 2));
  margin-inline: auto;
  padding-inline: var(--pad);
}

.shell--narrow { --shell: 820px; }

.section { padding-block: clamp(44px, 6.5vw, 88px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 64ch;
  margin-bottom: clamp(24px, 3.2vw, 42px);
}

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

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--lime);
  flex: 0 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.1;
}

.lede {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.82;
  color: rgba(244, 247, 242, 0.76);
  max-width: 62ch;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--gap, 16px);
}

/* ---------- 5. 蓝图网格 ---------- */
.blueprint { position: relative; }

.blueprint::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 88px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0) 94%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0) 94%);
}

/* ---------- 6. 通用按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 61, 0.48);
}

.btn--primary {
  background: var(--lime);
  border-color: var(--lime);
  color: #06210F;
  box-shadow: 0 12px 30px rgba(200, 255, 61, 0.16);
}

.btn--primary:hover {
  background: #d8ff69;
  box-shadow: 0 16px 38px rgba(200, 255, 61, 0.24);
}

.btn--ghost { background: transparent; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--white);
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

.chip:hover {
  border-color: rgba(200, 255, 61, 0.55);
  background: rgba(200, 255, 61, 0.08);
}

.chip--accent {
  background: var(--lime);
  border-color: var(--lime);
  color: #06210F;
  font-weight: 700;
}

.chip--accent:hover {
  background: #d8ff69;
  border-color: #d8ff69;
  color: #06210F;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
}

.tag--lime {
  color: var(--lime);
  border-color: rgba(200, 255, 61, 0.42);
  background: rgba(200, 255, 61, 0.09);
}

.tag--yellow {
  color: var(--signal);
  border-color: rgba(245, 197, 66, 0.42);
  background: rgba(245, 197, 66, 0.09);
}

.tag--red {
  color: var(--red);
  border-color: rgba(229, 72, 77, 0.46);
  background: rgba(229, 72, 77, 0.10);
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(91, 200, 232, 0.40);
  background: rgba(91, 200, 232, 0.08);
}

/* ---------- 7. 面板 / 栅格 / 面包屑 / 正文 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(31, 59, 68, 0.34), rgba(13, 27, 42, 0.26));
}

.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)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.breadcrumbs {
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

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

.breadcrumbs li + li::before {
  content: "/";
  color: rgba(244, 247, 242, 0.26);
}

.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--white); }

.prose {
  max-width: 74ch;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.84);
}

.prose > * + * { margin-top: 1.1em; }

.prose h2,
.prose h3 {
  margin-top: 2em;
  color: var(--white);
}

.prose h2 { font-size: clamp(25px, 2.8vw, 33px); }
.prose h3 { font-size: clamp(19px, 2vw, 23px); }

.prose ul,
.prose ol {
  display: flex;
  flex-direction: column;
  gap: 0.55em;
  padding-left: 18px;
}

.prose ul li { position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--lime);
}

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(91, 200, 232, 0.35);
}

.prose a:hover { border-bottom-color: var(--cyan); }

/* ---------- 8. 媒体容器（供页面阶段放图） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(120% 100% at 15% 0%, rgba(91, 200, 232, 0.16), transparent 60%),
    linear-gradient(160deg, #123027 0%, #0D1B2A 100%);
}

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

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media--bare {
  border: 0;
  border-radius: 0;
  background: #0D1B2A;
}

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 9. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 300;
  transform: translate(-50%, -160%);
  padding: 10px 20px;
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--lime);
  color: #06210F;
  font-size: 14px;
  font-weight: 700;
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
  outline-offset: 0;
}

/* ==========================================================================
   10. 页头
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 40;
  border-bottom: 1px solid var(--line);
}

/* 顶部状态条 */
.header-utility {
  border-bottom: 1px solid var(--line);
  background: rgba(13, 27, 42, 0.55);
}

.utility-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px 22px;
  padding-block: 9px;
  font-size: 12px;
}

.utility-status {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.pulse-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(200, 255, 61, 0.7);
  animation: od-pulse 2.6s var(--ease) infinite;
}

@keyframes od-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(200, 255, 61, 0.52); }
  70%  { box-shadow: 0 0 0 9px rgba(200, 255, 61, 0); }
  100% { box-shadow: 0 0 0 0 rgba(200, 255, 61, 0); }
}

.utility-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* 刊头 */
.masthead {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3.2vw, 34px) clamp(18px, 2.6vw, 26px);
}

.masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px 88px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0));
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0));
}

.masthead-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
}

.masthead-note {
  max-width: 24ch;
  text-align: left;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.masthead-meta {
  text-align: right;
  font-size: 11.5px;
  line-height: 1.8;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 11px;
  justify-content: center;
}

.brand-mark {
  display: inline-block;
  padding: 5px 9px;
  border-radius: var(--radius);
  background: var(--lime);
  color: #06210F;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(200, 255, 61, 0.26);
  transition: box-shadow var(--dur) var(--ease);
}

.brand:hover .brand-mark { box-shadow: 0 0 32px rgba(200, 255, 61, 0.5); }

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--white);
}

/* 栏目带 */
.nav-band {
  position: sticky;
  top: 0;
  z-index: 60;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 31, 26, 0.9);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
}

.site-nav { position: relative; }

.nav-list {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(0px, 0.8vw, 10px);
}

.nav-list a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 16px 12px;
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 9px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

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

.nav-list a[aria-current="page"] {
  color: var(--lime);
  font-weight: 600;
}

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

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(31, 59, 68, 0.5);
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: rgba(200, 255, 61, 0.5); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

/* ==========================================================================
   11. 页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(13, 27, 42, 0.62), rgba(6, 18, 14, 0.96));
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 255, 61, 0.5), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(24px, 3vw, 44px);
  padding-block: clamp(36px, 5vw, 64px);
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.brand--footer { justify-content: flex-start; }
.brand--footer .brand-name { font-size: clamp(24px, 2.6vw, 30px); }
.brand--footer .brand-mark { font-size: 13px; padding: 4px 8px; }

.footer-summary {
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.74);
}

.footer-note {
  max-width: 40ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  padding-left: 12px;
  border-left: 2px solid rgba(200, 255, 61, 0.45);
}

.footer-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--lime);
  text-transform: uppercase;
}

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

.footer-links a {
  font-size: 15px;
  color: var(--mist);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--white);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 247, 242, 0.78);
}

.footer-contact li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.footer-contact .mono {
  color: var(--white);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--mist);
}

.footer-legal { letter-spacing: 0.03em; }

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-bottom-links a { transition: color var(--dur) var(--ease); }
.footer-bottom-links a:hover { color: var(--cyan); }

/* ==========================================================================
   12. 交互反馈层
   ========================================================================== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 240;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  pointer-events: none;
  will-change: transform;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

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

/* ==========================================================================
   13. 响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .masthead-inner {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    gap: 10px;
    text-align: center;
  }

  .masthead-note,
  .masthead-meta {
    max-width: none;
    text-align: center;
  }
}

@media (max-width: 980px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 64px; }

  .nav-inner { min-height: 50px; }
  .nav-toggle { display: none; }

  html[data-js="on"] .nav-toggle { display: inline-flex; }

  html[data-js="on"] .nav-inner {
    justify-content: space-between;
    padding-block: 6px;
  }

  html[data-js="on"] .site-nav {
    position: absolute;
    inset: 100% 0 auto;
    max-height: 0;
    visibility: hidden;
    overflow: hidden;
    background: #0A1C17;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 48px rgba(0, 0, 0, 0.5);
    transition: max-height 280ms var(--ease), visibility 280ms linear;
  }

  html[data-js="on"] .site-nav[data-open="true"] {
    max-height: min(72vh, 520px);
    visibility: visible;
    overflow-y: auto;
  }

  html[data-js="on"] .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 6px;
  }

  html[data-js="on"] .nav-list a {
    padding: 14px 20px;
    font-size: 15px;
    border-bottom: 1px solid var(--line);
  }

  html[data-js="on"] .nav-list li:last-child a { border-bottom: 0; }

  html[data-js="on"] .nav-list a::after { display: none; }

  html[data-js="on"] .nav-list a[aria-current="page"] {
    background: rgba(200, 255, 61, 0.07);
    box-shadow: inset 3px 0 0 var(--lime);
  }
}

@media (max-width: 720px) {
  .utility-inner {
    grid-template-columns: minmax(0, 1fr);
    justify-items: start;
  }

  .utility-actions { justify-content: flex-start; }

  .footer-contact li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

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

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

  .btn { width: 100%; }
}

/* ---------- 14. 降低动效 ---------- */
@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;
  }

  .pulse-dot { animation: none; }

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