:root {
  --blue: #2a6af0;
  --blue-deep: #1648c7;
  --cyan: #22d3ee;
  --ink: #e8eef8;
  --ink-soft: #b6c2d6;
  --muted: #8b9bb0;
  --line: rgba(148, 197, 255, 0.12);
  --paper: #070d18;
  --white: #ffffff;
  --panel: rgba(12, 20, 36, 0.72);
  --ok: #14b8a6;
  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

/* 鈥斺€?Nav 鈥斺€?*/
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  height: 68px;
  display: flex; align-items: center;
  transition: background .4s var(--ease), backdrop-filter .4s var(--ease), border-color .4s, color .3s;
  border-bottom: 1px solid transparent;
  color: rgba(255, 255, 255, 0.88);
}
.nav.is-solid {
  color: var(--ink);
  background: rgba(7, 13, 24, 0.86);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom-color: var(--line);
}
.nav-inner {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
  display: flex; align-items: center; gap: 28px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}
.brand img {
  width: 36px; height: 36px; border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}
.nav-links {
  display: flex; gap: 22px; margin-left: 12px;
  font-size: 0.92rem;
  opacity: 0.88;
}
.nav-links a {
  position: relative;
  transition: opacity .2s, color .2s;
}
.nav-links a::after {
  content: "";
  position: absolute; left: 0; right: 100%; bottom: -4px;
  height: 1px;
  background: currentColor;
  transition: right .35s var(--ease);
  opacity: 0.55;
}
.nav-links a:hover { opacity: 1; }
.nav-links a:hover::after { right: 0; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 18px;
  border-radius: 999px;
  font-weight: 600; font-size: 0.92rem;
  transition: transform .25s var(--ease), background .2s, color .2s, box-shadow .25s, border-color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-ghost { color: inherit; opacity: 0.9; }
.btn-ghost:hover { opacity: 1; }
.btn-primary {
  background: var(--blue); color: #fff;
  box-shadow: 0 8px 24px rgba(42, 106, 240, 0.35);
}
.btn-primary:hover { background: var(--blue-deep); }
.nav.is-solid .btn-primary,
.nav:not(.is-solid) .btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
  color: #fff;
  box-shadow: 0 8px 28px rgba(42, 106, 240, 0.4);
}
.nav.is-solid .btn-primary:hover,
.nav:not(.is-solid) .btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa 0%, #67e8f9 100%);
  color: #fff;
}
.btn-outline {
  border: 1px solid rgba(100, 180, 255, 0.35);
  color: #cfe3ff;
  background: rgba(42, 106, 240, 0.12);
}
.btn-outline:hover { background: rgba(42, 106, 240, 0.22); }
.btn-lg { height: 52px; padding: 0 28px; font-size: 1rem; }

/* 鈥斺€?Hero锛堥珮绉戞妧鍔ㄦ晥锛屾棤鍥剧墖锛?鈥斺€?*/
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: #04080f;
}
.hero-fx {
  position: absolute; inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-canvas {
  position: absolute; inset: 0;
  z-index: 2;
  width: 100%; height: 100%;
  display: block;
}
.hero-mesh { z-index: 0; }
.hero-grid, .hero-orb { z-index: 1; }
.hero-scan, .hero-fade { z-index: 3; }
.hero-mesh {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 18% 15%, rgba(42, 106, 240, 0.38), transparent 58%),
    radial-gradient(ellipse 55% 50% at 88% 28%, rgba(34, 211, 238, 0.22), transparent 55%),
    radial-gradient(ellipse 60% 45% at 55% 90%, rgba(20, 184, 166, 0.18), transparent 50%),
    linear-gradient(180deg, #050a14 0%, #07101c 45%, #0a1524 100%);
}
.hero-grid {
  position: absolute; inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(148, 197, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 197, 255, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 40%, #000 20%, transparent 75%);
  transform: perspective(600px) rotateX(58deg) translateY(-8%) scale(1.6);
  transform-origin: center 70%;
  animation: grid-drift 18s linear infinite;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.55;
  animation: orb-float 12s var(--ease) infinite alternate;
}
.hero-orb-a {
  width: min(42vw, 420px); height: min(42vw, 420px);
  left: -8%; top: 12%;
  background: radial-gradient(circle, rgba(42, 106, 240, 0.55), transparent 68%);
}
.hero-orb-b {
  width: min(36vw, 360px); height: min(36vw, 360px);
  right: -6%; bottom: 18%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.4), transparent 68%);
  animation-delay: -4s;
}
.hero-scan {
  position: absolute; left: 0; right: 0; height: 28%;
  top: -30%;
  background: linear-gradient(180deg, transparent, rgba(34, 211, 238, 0.06), transparent);
  animation: scan-sweep 7.5s ease-in-out infinite;
}
.hero-fade {
  position: absolute; left: 0; right: 0; bottom: 0; height: 32%;
  background: linear-gradient(180deg, transparent, var(--paper));
}
@keyframes grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 0 64px, 64px 0; }
}
@keyframes orb-float {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4%, 6%, 0) scale(1.08); }
}
@keyframes scan-sweep {
  0% { top: -30%; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: 110%; opacity: 0; }
}
@keyframes shine-pulse {
  from { opacity: 0.75; }
  to { opacity: 1; }
}
.hero-content {
  position: relative; z-index: 1;
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 120px 0 88px;
}
.hero-brand {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 22px;
  opacity: 0;
  animation: rise 1s var(--ease) 0.08s forwards;
}
.hero-brand img {
  width: 64px; height: 64px; border-radius: 16px;
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.12);
}
.hero-brand span {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 2.85rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}
.hero h1 {
  margin: 0 0 18px;
  max-width: 10em;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.045em;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.35);
  opacity: 0;
  animation: rise 1s var(--ease) 0.22s forwards;
}
.hero h1 .accent {
  background: linear-gradient(115deg, #fff 20%, var(--cyan) 55%, #93c5fd 85%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  margin: 0 0 36px;
  max-width: 34rem;
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: rgba(255, 255, 255, 0.88);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.25);
  opacity: 0;
  animation: rise 1s var(--ease) 0.38s forwards;
}
.hero-cta {
  display: flex; flex-wrap: wrap; gap: 14px;
  opacity: 0;
  animation: rise 1s var(--ease) 0.52s forwards;
}
.hero .hero-cta .btn-primary,
.hero .btn-primary {
  background: linear-gradient(135deg, #38bdf8 0%, #22d3ee 45%, #a5f3fc 100%) !important;
  color: #062033 !important;
  border: 0 !important;
  font-weight: 700;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.35) inset,
    0 10px 32px rgba(34, 211, 238, 0.55),
    0 0 48px rgba(56, 189, 248, 0.55);
}
.hero .hero-cta .btn-primary:hover,
.hero .btn-primary:hover {
  background: linear-gradient(135deg, #7dd3fc 0%, #67e8f9 50%, #ecfeff 100%) !important;
  color: #062033 !important;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.5) inset,
    0 14px 40px rgba(34, 211, 238, 0.7),
    0 0 64px rgba(125, 211, 252, 0.65);
}
.hero .hero-cta .btn-outline,
.hero .btn-outline {
  border: 0 !important;
  color: #062033 !important;
  background: #fff !important;
  font-weight: 700;
  box-shadow:
    0 10px 28px rgba(255, 255, 255, 0.25),
    0 0 36px rgba(125, 211, 252, 0.35);
}
.hero .hero-cta .btn-outline:hover,
.hero .btn-outline:hover {
  background: #f0f9ff !important;
  color: #062033 !important;
  box-shadow:
    0 14px 36px rgba(255, 255, 255, 0.35),
    0 0 48px rgba(56, 189, 248, 0.45);
}

.hero-scroll {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0;
  animation: rise 1s var(--ease) 0.9s forwards;
}
.hero-scroll i {
  width: 18px; height: 28px;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  border-radius: 10px;
  position: relative;
}
.hero-scroll i::after {
  content: "";
  position: absolute;
  left: 50%; top: 6px;
  width: 3px; height: 6px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.75);
  animation: scroll-dot 1.6s var(--ease) infinite;
}
@keyframes scroll-dot {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(10px); }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(28px); filter: blur(4px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
/* —— Sections（全站深色科技风） —— */
.section {
  position: relative;
  padding: 104px 0;
  overflow: hidden;
  color: var(--ink);
}
.section::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(100, 180, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 180, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 10%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 10%, transparent 75%);
  animation: section-grid 24s linear infinite;
}
.section::after {
  content: "";
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
  background: radial-gradient(circle, rgba(42, 106, 240, 0.45), transparent 70%);
  right: -120px; top: 10%;
  animation: orb-float 14s var(--ease) infinite alternate;
}
.section.alt::after {
  left: -140px; right: auto; top: auto; bottom: 5%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.35), transparent 70%);
}
@keyframes section-grid {
  from { background-position: 0 0, 0 0; }
  to { background-position: 0 56px, 56px 0; }
}
.section > .wrap { position: relative; z-index: 1; }

.section-head {
  max-width: 36rem;
  margin-bottom: 52px;
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
.section-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.65rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  background: linear-gradient(115deg, #fff 30%, #93c5fd 70%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}
.reveal {
  opacity: 0;
  transform: translateY(36px) scale(0.98);
  filter: blur(6px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease), filter 0.85s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
  filter: none;
}
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
.reveal.d5 { transition-delay: .4s; }

.feature {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 56px;
  align-items: center;
}
.feature.reverse { direction: rtl; }
.feature.reverse > * { direction: ltr; }
.feature-copy h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.18;
}
.feature-copy > p {
  margin: 0 0 28px;
  color: var(--muted);
}
.feature-points { display: grid; gap: 12px; }
.feature-points li {
  position: relative;
  padding: 16px 16px 16px 18px;
  border-radius: 14px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--panel), var(--panel)) padding-box,
    linear-gradient(120deg, rgba(100, 180, 255, 0.35), transparent 45%, rgba(34, 211, 238, 0.25)) border-box;
  backdrop-filter: blur(10px);
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.feature-points li:hover {
  transform: translateX(6px);
  box-shadow: 0 0 28px rgba(42, 106, 240, 0.18);
}
.feature-points strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.98rem;
  color: #fff;
}
.feature-points span {
  color: var(--muted);
  font-size: 0.92rem;
}

.stage {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: #050b14;
  aspect-ratio: 16 / 11;
  box-shadow:
    0 28px 70px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(100, 180, 255, 0.18),
    0 0 60px rgba(42, 106, 240, 0.15);
  transform: perspective(900px) rotateY(-2deg) rotateX(1deg);
  transition: transform .5s var(--ease), box-shadow .5s;
}
.stage::after {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(100, 180, 255, 0.55), transparent 40%, rgba(34, 211, 238, 0.45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  animation: border-glow 4s ease-in-out infinite alternate;
  z-index: 3;
}
@keyframes border-glow {
  from { opacity: 0.55; }
  to { opacity: 1; }
}
.feature:hover .stage,
.feature.reverse:hover .stage {
  transform: perspective(900px) rotateY(0) rotateX(0);
  box-shadow:
    0 32px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(100, 180, 255, 0.28),
    0 0 80px rgba(42, 106, 240, 0.28);
}
.stage::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(125deg, rgba(42, 106, 240, 0.16), transparent 40%, rgba(20, 184, 166, 0.1));
  pointer-events: none;
  z-index: 1;
}
.stage-bar {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}
.stage-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.75);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.stage-body {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: calc(100% - 40px);
}
.stage-col {
  padding: 14px;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  line-height: 1.55;
}
.stage-col:last-child { border-right: 0; }
.stage-label {
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
  margin-bottom: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.stage-bubble {
  background: rgba(42, 106, 240, 0.18);
  border-left: 3px solid var(--blue);
  padding: 10px 12px;
  margin-bottom: 10px;
  border-radius: 0 10px 10px 0;
  animation: bubble-in 0.7s var(--ease) both;
  box-shadow: 0 0 20px rgba(42, 106, 240, 0.08);
}
.stage-bubble:nth-child(2) { animation-delay: 0.15s; }
.stage-bubble:nth-child(3) { animation-delay: 0.3s; }
.stage-bubble.ai {
  background: rgba(20, 184, 166, 0.16);
  border-left-color: var(--ok);
  animation-delay: 0.45s;
  box-shadow: 0 0 20px rgba(20, 184, 166, 0.1);
}
@keyframes bubble-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.stage-typing::after {
  content: "";
  display: inline-block;
  width: 6px; height: 1em;
  margin-left: 2px;
  background: var(--ok);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.stage-alt {
  background:
    linear-gradient(145deg, rgba(42, 106, 240, 0.22), transparent 48%),
    #070e1a;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  color: #e2e8f0;
  transform: none;
  aspect-ratio: auto;
  min-height: 280px;
}
.stage-alt h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}
.stage-chips {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.stage-chips span {
  padding: 7px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(100, 180, 255, 0.2);
  font-size: 0.82rem;
  color: rgba(226, 232, 240, 0.9);
  transition: transform .25s var(--ease), background .25s, border-color .25s, box-shadow .25s;
}
.stage-chips span:hover {
  transform: translateY(-3px);
  background: rgba(42, 106, 240, 0.28);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: 0 0 18px rgba(42, 106, 240, 0.25);
}

.scenarios { background: transparent; border: 0; }
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.scene-item {
  position: relative;
  padding: 22px 20px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid rgba(100, 180, 255, 0.14);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s, border-color .35s;
}
.scene-item::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(42, 106, 240, 0.18), transparent 50%);
  opacity: 0;
  transition: opacity .35s;
}
.scene-item:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 32px rgba(42, 106, 240, 0.2);
}
.scene-item:hover::before { opacity: 1; }
.scene-item h3,
.scene-item p { position: relative; z-index: 1; }
.scene-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  color: #fff;
}
.scene-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}
.price-plan {
  position: relative;
  padding: 30px 26px;
  border-radius: 20px;
  background: var(--panel);
  border: 1px solid rgba(100, 180, 255, 0.16);
  backdrop-filter: blur(12px);
  transition: transform .35s var(--ease), box-shadow .35s;
  overflow: hidden;
}
.price-plan::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 0%, rgba(42, 106, 240, 0.25), transparent 45%);
  opacity: 0.6;
  pointer-events: none;
}
.price-plan > * { position: relative; z-index: 1; }
.price-plan:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 40px rgba(42, 106, 240, 0.18);
}
.price-plan.featured {
  border-color: transparent;
  background:
    linear-gradient(#0a1322, #0a1322) padding-box,
    linear-gradient(145deg, var(--blue), var(--cyan), var(--blue)) border-box;
  border: 1.5px solid transparent;
  box-shadow: 0 20px 50px rgba(42, 106, 240, 0.22), 0 0 50px rgba(34, 211, 238, 0.12);
  animation: featured-pulse 5s ease-in-out infinite alternate;
}
@keyframes featured-pulse {
  from { box-shadow: 0 20px 50px rgba(42, 106, 240, 0.18), 0 0 40px rgba(34, 211, 238, 0.08); }
  to { box-shadow: 0 24px 60px rgba(42, 106, 240, 0.3), 0 0 70px rgba(34, 211, 238, 0.18); }
}
.price-plan h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #fff;
}
.price-plan .amount {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 12px 0 4px;
  color: #fff;
}
.price-plan .amount small {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
}
.price-plan .hint {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 18px;
}
.price-plan ul {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.price-plan ul li::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
  vertical-align: 0.15em;
}
.price-plan .btn { width: 100%; }
.price-note {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
  transition: background .3s;
}
.faq-item:hover { background: rgba(42, 106, 240, 0.06); }
.faq-item button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 8px;
  text-align: left;
  font-weight: 600;
  color: #fff;
}
.faq-item button::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
  transition: transform .3s var(--ease);
}
.faq-item.open button::after { transform: rotate(45deg); }
.faq-body {
  display: none;
  padding: 0 8px 20px;
  color: var(--muted);
  font-size: 0.95rem;
}
.faq-item.open .faq-body { display: block; }

.download {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: #040912;
}
.download::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 55% 70% at 85% 15%, rgba(42, 106, 240, 0.45), transparent 58%),
    radial-gradient(ellipse 45% 55% at 8% 85%, rgba(20, 184, 166, 0.25), transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(34, 211, 238, 0.08), transparent 45%);
  animation: shine-pulse 10s ease-in-out infinite alternate;
}
.download::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(100, 180, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 180, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  pointer-events: none;
}
.download .wrap {
  position: relative;
  z-index: 1;
  padding: 96px 0;
  display: grid;
  gap: 28px;
  justify-items: start;
}
.download h2 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 3rem);
  letter-spacing: -0.035em;
  line-height: 1.12;
}
.download p {
  margin: 0;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.72);
}
.download-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
}
.download .btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
  color: #fff;
  box-shadow: 0 12px 36px rgba(42, 106, 240, 0.45), 0 0 30px rgba(34, 211, 238, 0.3);
}
.download .btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa 0%, #67e8f9 100%);
  color: #fff;
}
.download .btn-outline {
  border: 1.5px solid rgba(125, 211, 252, 0.75);
  color: #e0f2fe;
  background: rgba(14, 165, 233, 0.16);
}
.platform-hint {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.42);
}

.footer {
  padding: 40px 0 48px;
  background: #050a12;
  border-top: 1px solid var(--line);
  color: var(--ink);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
}
.footer-brand img { width: 28px; height: 28px; border-radius: 7px; }
.footer-links {
  display: flex; flex-wrap: wrap; gap: 18px;
  color: var(--muted); font-size: 0.9rem;
}
.footer-links a:hover { color: var(--cyan); }
.footer-copy {
  width: 100%;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  margin-left: auto;
}
.nav.is-solid .menu-toggle { border-color: var(--line); }
.menu-toggle span {
  display: block; width: 18px; height: 2px;
  background: currentColor;
  position: relative;
}
.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute; left: 0; width: 18px; height: 2px;
  background: currentColor;
}
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

@media (max-width: 900px) {
  .feature, .feature.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 32px;
  }
  .stage { transform: none; }
  .scene-grid { grid-template-columns: 1fr; gap: 12px; }
  .price-grid { grid-template-columns: 1fr; }
  .nav-links, .nav-actions .btn-ghost { display: none; }
  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px; left: 0; right: 0;
    padding: 16px 24px 20px;
    background: rgba(7, 13, 24, 0.98);
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    gap: 14px;
  }
  .menu-toggle { display: inline-flex; }
  .hero-content { padding-bottom: 72px; }
  .hero-scroll { display: none; }
  .section { padding: 72px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-grid, .hero-orb, .hero-scan, .download::before,
  .section::before, .section::after, .price-plan.featured, .stage::after { animation: none; }
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .hero-brand, .hero h1, .hero-lead, .hero-cta, .hero-scroll {
    opacity: 1; animation: none; filter: none;
  }
  .stage-bubble { animation: none; }
}