:root {
  --bg: #fff;
  --bg-alt: #f5f5f7;
  --surface: #f5f5f7;
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.16);
  --text: #1d1d1f;
  --muted: #6e6e73;
  --muted-2: #86868b;
  --link: #0066cc;
  /* 石墨质感文字 */
  --graphite: linear-gradient(180deg, #3a3a3c 0%, #1d1d1f 45%, #6e6e73 100%);
  /* 品牌光 */
  --c-orange: #ff9f0a;
  --c-pink: #ff375f;
  --c-purple: #bf5af2;
  --c-blue: #0a84ff;
  --c-cyan: #64d2ff;
  --glow: conic-gradient(var(--c-orange), var(--c-pink), var(--c-purple), var(--c-blue), var(--c-cyan), var(--c-orange));
  --glow-line: linear-gradient(90deg, var(--c-orange), var(--c-pink), var(--c-purple), var(--c-blue), var(--c-cyan), var(--c-purple), var(--c-pink), var(--c-orange));
  --radius: 28px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "HarmonyOS Sans SC",
    "MiSans", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: rgba(10, 132, 255, 0.18); }
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; }
/* 带 hidden 的元素一律隐藏，不被组件自己的 display 覆盖 */
[hidden] { display: none !important; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 22px; }
.section { padding: clamp(100px, 14vw, 180px) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 760px; margin-bottom: clamp(48px, 7vw, 88px); }

.eyebrow {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: clamp(14px, 1.3vw, 17px);
  font-weight: 600;
  letter-spacing: 0.06em;
}
h2 {
  font-size: clamp(34px, 5.4vw, 64px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.lead {
  margin-top: 20px;
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 21px);
}

/* 流动的品牌光文字 */
.flow-text {
  background: var(--glow-line);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: flow 6s linear infinite;
}
@keyframes flow { to { background-position: 200% 0; } }
@keyframes rotate { to { transform: rotate(360deg); } }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.4s var(--ease), background 0.3s, box-shadow 0.4s;
}
.btn-primary { background: var(--text); color: #fff; }
.btn-primary:hover {
  transform: scale(1.04);
  box-shadow: -10px 6px 30px rgba(255, 159, 10, 0.35), 10px 6px 30px rgba(10, 132, 255, 0.35);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--line-strong);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { background: #fff; }

/* 导航 */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  padding-top: env(safe-area-inset-top, 0px);
  border-bottom: 1px solid transparent;
  transition: background 0.4s, border-color 0.4s;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-color: var(--line);
}
.nav-inner {
  max-width: 1080px;
  height: 52px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 600; letter-spacing: 0.06em; }
.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--glow);
  -webkit-mask: radial-gradient(closest-side, transparent 58%, #000 62%);
  mask: radial-gradient(closest-side, transparent 58%, #000 62%);
  animation: rotate 8s linear infinite;
}
.nav-links { display: flex; gap: 32px; font-size: 13px; color: var(--muted); }
.nav-links a { transition: color 0.3s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

/* 首屏 */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 120px 22px 110px;
  text-align: center;
  overflow: hidden;
}
.hero.paused * { animation-play-state: paused !important; }

/* 光团：外层跟随鼠标，内层自己漂浮旋转 */
.blob {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(300px, 70vw);
  height: min(300px, 70vw);
  pointer-events: none;
  opacity: var(--o, 1);
  transform: translate(var(--bx, 0px), var(--by, 0px));
  transition: transform 0.9s var(--ease);
}
@media (hover: none) { .blob { transition-duration: 0.5s; } }
.blob i {
  position: absolute;
  inset: 0;
  /* 每团光的半径都不超出盒子，避免被裁出硬边 */
  background:
    radial-gradient(32% 32% at 38% 40%, rgba(255, 159, 10, 0.5), transparent),
    radial-gradient(30% 30% at 64% 36%, rgba(255, 55, 95, 0.4), transparent),
    radial-gradient(32% 32% at 60% 64%, rgba(10, 132, 255, 0.45), transparent),
    radial-gradient(30% 30% at 38% 64%, rgba(191, 90, 242, 0.42), transparent);
  animation: rotate 18s linear infinite, drift 11s ease-in-out infinite alternate;
}
/* 点击首屏空白处：光团溶解扭曲（滤镜只在动画期间挂上，平时不耗性能） */
.blob.melting { filter: url(#melt); }
.sr-filter { position: absolute; width: 0; height: 0; overflow: hidden; }
@keyframes drift {
  0% { scale: 1; translate: -4% 2%; }
  100% { scale: 1.15; translate: 4% -3%; }
}

.hero-content { position: relative; z-index: 1; max-width: 980px; }
.hero-title {
  font-size: clamp(44px, 8vw, 96px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero-sub { margin-top: 24px; color: var(--muted); font-size: clamp(18px, 2vw, 24px); }
.hero-actions { margin-top: 40px; display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }

/* 标题被光扫出并保持彩色：--sp 由滚动驱动，0 为未扫，1 为扫完
   底层是固定的彩色渐变，上层浅灰“雾”随 --sp 从左往右退开 */
.sweep { display: inline-block; }
.js .sweep {
  --edge: calc(var(--sp, 0) * 140% - 40%);
  background:
    linear-gradient(100deg, transparent var(--edge), #e8e8ed calc(var(--edge) + 40%)),
    linear-gradient(100deg, var(--c-orange), var(--c-pink) 35%, var(--c-purple) 68%, var(--c-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: calc(40px + env(safe-area-inset-bottom, 0px));
  width: 26px;
  height: 42px;
  margin-left: -13px;
  border: 1.5px solid rgba(0, 0, 0, 0.25);
  border-radius: 14px;
}
.scroll-hint span {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 3px;
  height: 8px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--text);
  animation: wheel 2s var(--ease) infinite;
}
@keyframes wheel {
  0% { opacity: 0; transform: translateY(0); }
  30% { opacity: 1; }
  100% { opacity: 0; transform: translateY(14px); }
}

/* 进场动画（仅在 JS 可用时隐藏初始状态） */
.js .reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.js .reveal.in { opacity: 1; transform: none; }
.hero-content .reveal:nth-child(2) { transition-delay: 0.1s; }
.hero-content .reveal:nth-child(3) { transition-delay: 0.2s; }
.hero-content .reveal:nth-child(4) { transition-delay: 0.3s; }

/* 理念 */
.manifesto { position: relative; height: 260vh; }
.manifesto-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  /* 用 flex 居中：iOS 的 grid 会把文字宽度算成 max-width，导致手机上不换行 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0 22px;
}
.manifesto-text {
  width: 100%;
  max-width: 920px;
  font-size: clamp(28px, 4.6vw, 56px);
  line-height: 1.38;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.manifesto-text em { font-style: normal; }
.js .manifesto-text .ch { color: rgba(0, 0, 0, 0.1); transition: color 0.35s; }
.js .manifesto-text .ch.on { color: var(--text); }
.js .manifesto-text .ch.em.on { color: var(--em-color, var(--text)); }
/* 手机：不再随滚动点亮，进入视口后像打字机一样逐字出现 */
.manifesto.typing { height: auto; }
.manifesto.typing .manifesto-sticky { position: relative; height: 100vh; height: 100svh; padding: 64px 22px 0; }
.js .manifesto.typing .ch { color: var(--text); opacity: 0; transition: none; }
.js .manifesto.typing .ch.em { color: var(--em-color, var(--text)); }
.js .manifesto.typing .ch.on { opacity: 1; }
.manifesto.typing .ch.caret { position: relative; }
.manifesto.typing .ch.caret::after {
  content: "";
  position: absolute;
  top: 0.12em;
  right: -0.12em;
  width: 3px;
  height: 1.1em;
  border-radius: 2px;
  background: var(--text);
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 鼠标跟随的柔光 */
.spotlight { position: relative; isolation: isolate; overflow: hidden; }
.spotlight::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background:
    radial-gradient(260px circle at var(--mx, -999px) var(--my, -999px), rgba(255, 159, 10, 0.1), transparent 70%),
    radial-gradient(420px circle at var(--mx, -999px) var(--my, -999px), rgba(10, 132, 255, 0.08), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.spotlight:hover::after { opacity: 1; }

/* 厚玻璃卡片：不依赖背景透色，质感来自厚边、内部光影、斜向反光、磨砂颗粒和双层投影 */
.stop-card,
.tile {
  border: 1px solid rgba(190, 196, 214, 0.45);
  background:
    /* 斜向反光 */
    linear-gradient(115deg, transparent 28%, rgba(255, 255, 255, 0.6) 42%, transparent 56%),
    /* 玻璃体：上亮下略冷 */
    linear-gradient(180deg, rgba(255, 255, 255, 0.62) 0%, rgba(247, 248, 251, 0.42) 55%, rgba(236, 239, 245, 0.36) 100%);
  -webkit-backdrop-filter: blur(24px) saturate(170%);
  backdrop-filter: blur(24px) saturate(170%);
  box-shadow:
    /* 厚边：上、左为亮棱，下、右为暗棱 */
    inset 0 2px 0 rgba(255, 255, 255, 1),
    inset 2px 0 0 rgba(255, 255, 255, 0.7),
    inset 0 -2px 0 rgba(150, 158, 180, 0.16),
    inset -2px 0 0 rgba(150, 158, 180, 0.08),
    /* 内部光影：顶部发亮、底部带冷灰 */
    inset 0 24px 36px -24px rgba(255, 255, 255, 1),
    inset 0 -28px 40px -28px rgba(130, 140, 170, 0.22),
    /* 贴地投影 + 远处投影 */
    0 1px 2px rgba(20, 24, 40, 0.06),
    0 18px 44px -12px rgba(20, 24, 40, 0.14);
}
.stop-card:hover,
.tile:hover {
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 1),
    inset 2px 0 0 rgba(255, 255, 255, 0.7),
    inset 0 -2px 0 rgba(150, 158, 180, 0.18),
    inset -2px 0 0 rgba(150, 158, 180, 0.1),
    inset 0 24px 36px -24px rgba(255, 255, 255, 1),
    inset 0 -28px 40px -28px rgba(130, 140, 170, 0.26),
    0 2px 4px rgba(20, 24, 40, 0.06),
    0 30px 60px -16px rgba(20, 24, 40, 0.2);
}
/* 磨砂颗粒 */
.stop-card::before,
.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0.1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
/* 学习路线 */
.path-track { position: relative; padding-left: 44px; }
.path-line {
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.08);
  overflow: hidden;
}
.path-line-fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(var(--c-orange), var(--c-pink), var(--c-purple), var(--c-blue));
  transform-origin: top;
  transform: scaleY(var(--p, 0));
}
.path-list { list-style: none; display: grid; gap: 16px; }
.stop { position: relative; }
.stop::before {
  content: "";
  position: absolute;
  left: -38px;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0, 0, 0, 0.16);
  transition: background 0.5s, border-color 0.5s, box-shadow 0.5s;
}
.stop.lit::before { background: var(--text); border-color: var(--text); box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.06); }
.stop-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(16px, 3vw, 36px);
  padding: clamp(22px, 3vw, 32px) clamp(22px, 3vw, 36px);
  border-radius: var(--radius);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), background 0.4s;
}
.stop-card:hover { transform: translateX(6px); }
.stop-num {
  min-width: 2ch;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: var(--graphite);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stop.lit .stop-num { background: var(--glow-line); background-size: 200% auto; -webkit-background-clip: text; background-clip: text; }
.stop-card h3 { font-size: clamp(19px, 2.2vw, 26px); font-weight: 600; }
.stop-card p { margin-top: 6px; color: var(--muted); font-size: clamp(14px, 1.4vw, 17px); }
.stop-arrow { color: var(--muted-2); font-size: 22px; transition: transform 0.4s var(--ease), color 0.3s; }
.stop-card:hover .stop-arrow { transform: translateX(4px); color: var(--text); }

/* 社区 Bento */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(260px, auto);
  gap: 16px;
}
.tile {
  display: flex;
  flex-direction: column;
  padding: clamp(26px, 3vw, 40px);
  border-radius: var(--radius);
  transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease), background 0.4s;
}
.tile:hover { transform: translateY(-4px); }
.tile-xl { grid-column: span 2; grid-row: span 2; }
.tile-wide { grid-column: span 3; }
.tile-tag { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; color: var(--muted-2); }
.tile h3 { margin-top: 12px; font-size: clamp(24px, 2.8vw, 36px); line-height: 1.15; font-weight: 700; }
.tile-xl h3 { font-size: clamp(32px, 4.4vw, 56px); }
.tile p { margin-top: 12px; max-width: 30em; color: var(--muted); }
.tile-more { margin-top: auto; padding-top: 24px; font-size: 15px; font-weight: 600; color: var(--link); }

/* 社区标题下的二维码：公众号 + 加好友进群 */
#community .section-head { margin-bottom: clamp(20px, 2.4vw, 28px); }
.follow { display: flex; flex-direction: column; align-items: flex-start; gap: 28px; margin-top: 24px; }
.follow > p { max-width: 24em; color: var(--muted); font-size: clamp(16px, 1.5vw, 19px); }
.follow-codes { display: flex; gap: 20px; flex-shrink: 0; }
.follow-codes figure { text-align: center; }
.follow-codes img {
  width: clamp(120px, 13vw, 160px);
  /* 两张原图比例不同，统一成正方形，标签才能对齐；height:auto 才能让 aspect-ratio 生效 */
  height: auto;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 10px;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 0 0 1px var(--line), 0 10px 28px rgba(20, 24, 40, 0.1);
}
.follow-codes figcaption { margin-top: 10px; font-size: 14px; font-weight: 600; color: var(--muted); }

/* 资料库：层叠的文档卡 */
.docs { position: relative; height: 210px; margin-top: 36px; }
.docs i {
  position: absolute;
  right: 4%;
  bottom: 0;
  width: 64%;
  height: 170px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    var(--glow-line) 24px 26px / 38% 10px no-repeat,
    repeating-linear-gradient(rgba(0, 0, 0, 0.08) 0 6px, transparent 6px 20px) 24px 58px / 72% 86px no-repeat,
    #fff;
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.1);
  transition: transform 0.7s var(--ease);
}
.docs i:nth-child(1) { transform: translate(-56px, -44px) rotate(-7deg); opacity: 0.6; }
.docs i:nth-child(2) { transform: translate(-28px, -22px) rotate(-3.5deg); opacity: 0.85; }
.tile:hover .docs i:nth-child(1) { transform: translate(-96px, -60px) rotate(-11deg); }
.tile:hover .docs i:nth-child(2) { transform: translate(-48px, -30px) rotate(-5deg); }
.tile:hover .docs i:nth-child(3) { transform: translate(8px, 4px) rotate(1.5deg); }

/* 校园矩阵：点阵 */
.dots {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 12px 0;
  margin-top: auto;
  padding-top: 28px;
}
.dots i { justify-self: center; width: 6px; height: 6px; border-radius: 50%; background: rgba(0, 0, 0, 0.1); }
.dots i.on { background: var(--dot, var(--c-blue)); box-shadow: 0 0 10px var(--dot, var(--c-blue)); animation: pulse 4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.2; } }

/* 生态合伙人：交汇的圆 */
.venn { position: relative; height: 90px; margin-top: auto; padding-top: 28px; }
.venn i {
  position: absolute;
  bottom: 0;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  mix-blend-mode: multiply;
  transition: transform 0.7s var(--ease);
}
.venn i:nth-child(1) { left: 0; background: linear-gradient(135deg, #ffd29a, #ff9fb5); }
.venn i:nth-child(2) { left: 52px; background: linear-gradient(135deg, #d9b3ff, #9cceff); }
.tile:hover .venn i:nth-child(1) { transform: translateX(14px); }
.tile:hover .venn i:nth-child(2) { transform: translateX(-14px); }

/* 加入：全页唯一的黑色时刻 */
.join-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 48px;
  padding: clamp(32px, 6vw, 72px);
  border-radius: 36px;
  color: #f5f5f7;
  background:
    radial-gradient(70% 90% at 85% 50%, rgba(10, 132, 255, 0.22), transparent 70%),
    radial-gradient(60% 80% at 70% 20%, rgba(255, 159, 10, 0.16), transparent 70%),
    #000;
  overflow: hidden;
}
.join-card .eyebrow { color: #a1a1a6; }
.join-text > p:not(.eyebrow) { margin: 20px 0 32px; color: #a1a1a6; font-size: 18px; }
.join-card .btn-ghost { color: #f5f5f7; background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.16); }
.join-card .btn-ghost:hover { background: rgba(255, 255, 255, 0.18); }
.touch-only { display: none; }
@media (hover: none) { .touch-only { display: inline; } }

/* 二维码：旋转的品牌光边框 */
.qr {
  position: relative;
  justify-self: center;
  width: min(280px, 72vw);
  padding: 3px;
  border-radius: 30px;
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    -24px -12px 70px rgba(255, 159, 10, 0.35),
    24px 12px 70px rgba(10, 132, 255, 0.45),
    0 24px 70px rgba(191, 90, 242, 0.3);
}
.qr::before {
  content: "";
  position: absolute;
  inset: -50%;
  z-index: -1;
  background: var(--glow);
  animation: rotate 6s linear infinite;
}
.qr-inner { padding: 16px; border-radius: 27px; background: #fff; }
.qr-inner img { width: 100%; height: auto; }

/* 页脚 */
.footer {
  padding: 32px 0 calc(32px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 13px;
}
.footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer a:hover { color: var(--text); }

/* 响应式 */
@media (max-width: 820px) {
  .bento { grid-template-columns: 1fr; }
  .tile-xl, .tile-wide { grid-column: auto; grid-row: auto; }
  .join-card { grid-template-columns: 1fr; text-align: center; }
  .join-text { order: 2; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .path-track { padding-left: 32px; }
  .path-line { left: 5px; }
  .stop::before { left: -32px; }
  .stop-card { grid-template-columns: auto 1fr; }
  .stop-arrow { display: none; }
  .docs { height: 170px; }
  .docs i { width: 78%; height: 140px; }
}

/* 尊重“减少动态效果”设置 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
}