/* emate 官网 · 设计系统见 design-system/emate/MASTER.md
   排版字体借鉴 ehunt.ai: Open Sans 字体栈 / 48px 内收敛标题 / 16px 正文 / 3 列均匀功能网格
   v5: eHunt 式排版密度 + 极光背景 + 入场/生长动效 + 材质层次 */

:root {
  --bg: #09090b;
  --bg-elevated: #0e0e11;
  --card: #101013;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(241, 100, 30, 0.45);
  --foreground: #fafafa;
  --muted: #a1a1aa;
  --faint: #71717a;
  --accent: #f1641e;
  --accent-hot: #ff7a2f;
  --accent-deep: #d4510f;
  --accent-glow: rgba(241, 100, 30, 0.28);
  --radius: 14px;
  --radius-sm: 10px;
  --easing: cubic-bezier(0.16, 1, 0.3, 1);
  /* eHunt 字体栈：Open Sans 优先，中文落 PingFang / 雅黑 */
  --font: "Open Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--foreground);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

a, summary, .btn { cursor: pointer; }

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

::selection { background: rgba(241, 100, 30, 0.32); }

/* ---------- 背景：极光流动 + 噪点（无网格） ---------- */

.ambient {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(720px 340px at 50% -6%, rgba(241, 100, 30, 0.12), transparent 70%),
    var(--bg);
}

.ambient::before {
  content: "";
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(38% 42% at 28% 22%, rgba(241, 100, 30, 0.10), transparent 70%),
    radial-gradient(32% 38% at 76% 28%, rgba(124, 92, 246, 0.08), transparent 70%),
    radial-gradient(42% 46% at 58% 78%, rgba(241, 100, 30, 0.06), transparent 70%),
    radial-gradient(30% 34% at 18% 72%, rgba(60, 120, 220, 0.05), transparent 70%);
  animation: aurora-drift 28s ease-in-out infinite alternate;
  will-change: transform;
}

.ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E");
}

@keyframes aurora-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(3%, -2%, 0) scale(1.05); }
  100% { transform: translate3d(-3%, 2%, 0) scale(1.02); }
}

/* ---------- 导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  padding: 0 clamp(20px, 5vw, 64px);
  background: rgba(9, 9, 11, 0.65);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
}

.brand-icon { width: 32px; height: 26px; }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 30px);
  font-size: 14px;
  color: var(--muted);
}

.site-nav > a {
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s var(--easing);
}
.site-nav > a:hover, .site-nav > a.active { color: var(--foreground); }
.site-nav > a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

/* 下载下拉 */
.download-picker { position: relative; }
.download-picker summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 8px 24px -8px var(--accent-glow);
  transition: transform 0.2s var(--easing), background 0.2s var(--easing), box-shadow 0.2s var(--easing);
}
.download-picker summary::-webkit-details-marker { display: none; }
.download-picker summary::after {
  content: "";
  width: 7px; height: 7px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s var(--easing);
}
.download-picker[open] summary::after { transform: rotate(225deg) translateY(-1px); }
.download-picker summary:hover {
  background: var(--accent-hot);
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 12px 28px -8px var(--accent-glow);
}

.download-picker-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 256px;
  padding: 6px;
  border-radius: 12px;
  background: rgba(16, 16, 19, 0.97);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.download-picker-menu a {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 9px 12px;
  border-radius: 8px;
  transition: background 0.15s var(--easing);
}
.download-picker-menu a:hover { background: var(--surface-strong); }
.download-picker-menu strong { font-size: 14px; color: var(--foreground); }
.download-picker-menu span { font-size: 12px; color: var(--muted); }

/* ---------- 通用区块 ---------- */

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) clamp(20px, 5vw, 40px);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-hot);
}

.section-title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.3;
  font-weight: 700;
}

.section-sub { margin: 0; max-width: 600px; color: var(--muted); font-size: 16px; }

/* ---------- Hero ---------- */

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(64px, 9vw, 110px) clamp(20px, 5vw, 40px) clamp(28px, 4vw, 44px);
  text-align: center;
}

/* 入场编排：badge → 标题 → 副文案 → CTA → 注释 依次浮现 */
.hero > * { animation: rise 0.8s var(--easing) both; }
.hero > *:nth-child(1) { animation-delay: 0.05s; }
.hero > *:nth-child(2) { animation-delay: 0.15s; }
.hero > *:nth-child(3) { animation-delay: 0.28s; }
.hero > *:nth-child(4) { animation-delay: 0.40s; }
.hero > *:nth-child(5) { animation-delay: 0.50s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-hot);
  box-shadow: 0 0 8px var(--accent-hot);
  animation: pulse 2.2s ease-in-out infinite;
}
.hero-badge b { color: var(--foreground); font-weight: 600; }

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.22;
  font-weight: 700;
}

.hero h1 .grad {
  background: linear-gradient(100deg, #ffb37a 0%, var(--accent-hot) 35%, var(--accent) 60%, #ffb37a 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: grad-sheen 7s linear infinite;
}

@keyframes grad-sheen {
  to { background-position: 220% 0; }
}

.hero-sub {
  margin: 0 auto 36px;
  max-width: 600px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
}

.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s var(--easing), box-shadow 0.2s var(--easing), background 0.2s var(--easing), border-color 0.2s var(--easing);
}
.btn svg { width: 17px; height: 17px; flex: none; }

/* 主按钮：hover 时一道扫光 */
.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 10px 30px -10px var(--accent-glow);
}
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.28) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.6s var(--easing);
  pointer-events: none;
}
.btn-primary:hover { background: var(--accent-hot); transform: translateY(-1px); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 14px 36px -10px var(--accent-glow); }
.btn-primary:hover::after { transform: translateX(120%); }
.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-ghost {
  color: var(--foreground);
  background: transparent;
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface); border-color: rgba(255, 255, 255, 0.22); transform: translateY(-1px); }
.btn-ghost:active { transform: translateY(0) scale(0.98); }

.hero-note { margin: 0; font-size: 13px; color: var(--faint); }

/* ---------- 流水线主视觉 ---------- */

.pipeline {
  max-width: 960px;
  margin: clamp(44px, 6vw, 72px) auto 0;
  padding: 0 clamp(20px, 5vw, 40px);
}

.pipe-track {
  display: flex;
  align-items: center;
}

.pipe-node {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 24px 16px 20px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 20px 40px -28px rgba(0, 0, 0, 0.7);
  text-align: center;
  transition: transform 0.25s var(--easing), border-color 0.25s var(--easing);
}
.pipe-node::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(241, 100, 30, 0.10), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s var(--easing);
  pointer-events: none;
}
.pipe-node:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.pipe-node:hover::after { opacity: 1; }

.pipe-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  margin-bottom: 8px;
  border-radius: 11px;
  color: var(--accent-hot);
  background: rgba(241, 100, 30, 0.10);
  border: 1px solid rgba(241, 100, 30, 0.25);
}
.pipe-icon svg { width: 20px; height: 20px; }

.pipe-label { font-weight: 600; font-size: 15px; }
.pipe-desc { font-size: 11.5px; color: var(--faint); font-family: var(--mono); letter-spacing: 0.2px; }

.pipe-link {
  position: relative;
  flex: none;
  width: clamp(24px, 4vw, 56px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(241, 100, 30, 0.6), transparent);
}

.pipe-pulse {
  position: absolute;
  top: 50%; left: 0;
  width: 6px; height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--accent-hot);
  box-shadow: 0 0 10px var(--accent-hot);
  animation: travel-x 2.6s linear infinite;
}

@keyframes travel-x {
  0% { left: 0; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

/* ---------- 能力 marquee ---------- */

.marquee {
  margin-top: clamp(48px, 7vw, 80px);
  padding: 18px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  width: max-content;
  animation: scroll-x 36s linear infinite;
}
.marquee:hover .marquee-inner { animation-play-state: paused; }

.marquee-inner span {
  white-space: nowrap;
  font-size: 14px;
  letter-spacing: 0.5px;
  color: var(--faint);
  transition: color 0.2s var(--easing);
}
.marquee-inner span:hover { color: var(--foreground); }
.marquee-inner .sep {
  flex: none;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

@keyframes scroll-x {
  to { transform: translateX(-50%); }
}

/* ---------- 功能区（eHunt 式 3 列均匀网格） ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 44px;
}

.feature-grid .reveal:nth-child(2) { transition-delay: 0.06s; }
.feature-grid .reveal:nth-child(3) { transition-delay: 0.12s; }
.feature-grid .reveal:nth-child(4) { transition-delay: 0.18s; }
.feature-grid .reveal:nth-child(5) { transition-delay: 0.24s; }
.feature-grid .reveal:nth-child(6) { transition-delay: 0.30s; }

.feature-card {
  position: relative;
  padding: 24px 22px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 24px 48px -32px rgba(0, 0, 0, 0.7);
  transition: border-color 0.25s var(--easing), transform 0.25s var(--easing), opacity 0.7s var(--easing);
  overflow: hidden;
}
.feature-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), rgba(241, 100, 30, 0.08), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s var(--easing);
  pointer-events: none;
}
.feature-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.feature-card:hover::after { opacity: 1; }

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  margin-bottom: 16px;
  border-radius: 11px;
  color: var(--accent-hot);
  background: rgba(241, 100, 30, 0.10);
  border: 1px solid rgba(241, 100, 30, 0.25);
  transition: transform 0.25s var(--easing);
}
.feature-card:hover .feature-icon { transform: translateY(-2px); }
.feature-icon svg { width: 20px; height: 20px; }

.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
.feature-card p { margin: 0; font-size: 14px; line-height: 1.75; color: var(--muted); }

/* ---------- 工作流区 ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps .reveal:nth-child(2) { transition-delay: 0.1s; }
.steps .reveal:nth-child(3) { transition-delay: 0.2s; }

.step {
  position: relative;
  padding: 64px 22px 24px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 24px 48px -32px rgba(0, 0, 0, 0.7);
  counter-increment: step;
  transition: border-color 0.25s var(--easing), transform 0.25s var(--easing), opacity 0.7s var(--easing);
}
.step::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(241, 100, 30, 0.08), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s var(--easing);
  pointer-events: none;
}
.step:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.step:hover::after { opacity: 1; }
.step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 22px; top: 20px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-hot);
}
.step h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 700; }
.step p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- 能力带 ---------- */

.band {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.band-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px clamp(20px, 5vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px clamp(28px, 5vw, 56px);
  font-size: 14.5px;
  color: var(--muted);
}
.band-item { display: inline-flex; align-items: center; gap: 10px; }
.band-item svg { width: 17px; height: 17px; color: var(--accent-hot); flex: none; }
.band-item strong { color: var(--foreground); font-weight: 600; }

/* ---------- 下载区 ---------- */

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 44px;
}

.download-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.download-grid .reveal:nth-child(3) { transition-delay: 0.2s; }

.platform-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 24px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 24px 48px -32px rgba(0, 0, 0, 0.7);
  transition: border-color 0.25s var(--easing), transform 0.25s var(--easing), opacity 0.7s var(--easing);
}
.platform-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(241, 100, 30, 0.08), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s var(--easing);
  pointer-events: none;
}
.platform-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.platform-card:hover::after { opacity: 1; }
.platform-card .os {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16.5px;
  font-weight: 700;
}
.platform-card .os svg { width: 20px; height: 20px; color: var(--accent-hot); }
.platform-card .ver { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.5px; }
.platform-card .desc { margin: 0 0 16px; font-size: 14px; color: var(--muted); flex: 1; }
.platform-card .btn { width: 100%; }

.download-tip { margin: 26px 0 0; text-align: center; font-size: 13px; color: var(--faint); }

/* ---------- 联系区 ---------- */

.contact-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(28px, 6vw, 72px);
  margin-top: 44px;
}

.qr-card {
  margin: 0;
  padding: 20px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 24px 48px -32px rgba(0, 0, 0, 0.7);
}
.qr-card img {
  width: 200px; height: 200px;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
}
.qr-card figcaption { margin-top: 12px; text-align: center; font-size: 13px; color: var(--muted); }

.contact-points { max-width: 420px; display: flex; flex-direction: column; gap: 20px; }
.contact-point { display: flex; gap: 14px; align-items: flex-start; }
.contact-point svg { width: 20px; height: 20px; color: var(--accent-hot); flex: none; margin-top: 3px; }
.contact-point h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
.contact-point p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px clamp(20px, 5vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  max-width: 1120px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--faint);
}
.site-footer .foot-brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 650; color: var(--foreground); }
.site-footer .foot-brand img { width: 22px; height: 18px; }
.site-footer nav { display: flex; gap: 22px; }
.site-footer nav a { transition: color 0.2s var(--easing); }
.site-footer nav a:hover { color: var(--foreground); }

/* ---------- 子页面 Hero ---------- */

.page-hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 80px) clamp(20px, 5vw, 40px) 0;
}
.page-hero.center { text-align: center; }
.page-hero.center .section-sub { margin: 0 auto; }

/* ---------- 动效 ---------- */

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--easing), transform 0.7s var(--easing); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero > * { animation: none; }
  .hero-badge .dot { animation: none; }
  .hero h1 .grad { animation: none; }
  .ambient::before { animation: none; }
  .pipe-pulse { animation: none; opacity: 0; }
  .marquee-inner { animation: none; flex-wrap: wrap; width: auto; justify-content: center; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .feature-grid, .steps, .download-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .feature-grid, .steps, .download-grid { grid-template-columns: 1fr; }
  .site-header { flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
  .site-nav { gap: 14px; font-size: 13px; }
  .download-picker-menu { right: auto; left: 0; }
  .hero { text-align: left; }
  .hero-cta { justify-content: flex-start; }
  .pipe-track { flex-direction: column; gap: 0; }
  .pipe-node { width: 100%; }
  .pipe-link {
    width: 1px;
    height: 30px;
    background: linear-gradient(180deg, transparent, rgba(241, 100, 30, 0.6), transparent);
  }
  .pipe-pulse { left: 50%; top: 0; animation-name: travel-y; }
}

@keyframes travel-y {
  0% { top: 0; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}