:root {
  color-scheme: light;
  --bg: #f6f8f5;
  --paper: #ffffff;
  --ink: #111917;
  --muted: #4f6059;
  --green: #16382d;
  --signal: #65c996;
  --soft: #dce5dd;
  --muted-bg: #edf1ee;
  --dark: #101817;
  --dark-2: #15211f;
  --shadow: 0 22px 70px rgba(24, 38, 32, 0.14);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 32px;
  background: rgba(246, 248, 245, 0.86);
  border-bottom: 1px solid rgba(220, 229, 221, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand img {
  width: 34px;
  height: 34px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  padding: 10px 0;
}

.site-nav a:hover {
  color: var(--green);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--soft);
  border-radius: var(--radius);
  background: var(--paper);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.section-band {
  padding: 96px 32px;
}

.section-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 88px 32px;
  text-align: center;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 44px;
  align-items: center;
  min-height: calc(100vh - 72px);
  max-width: var(--max);
  margin: 0 auto;
}

.hero-copy,
.hero-visual,
.section-head,
.feature-slab,
.support {
  min-width: 0;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
}

.company-intro {
  max-width: 650px;
  margin-bottom: 34px;
  padding-left: 18px;
  border-left: 3px solid var(--signal);
}

.company-intro p {
  margin: 0;
}

.company-name {
  color: var(--green);
  font-size: 13px;
  font-weight: 850;
}

.company-slogan {
  margin-top: 3px;
  color: var(--ink);
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 850;
  line-height: 1.05;
}

.company-intro p:last-child {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.company-intro span {
  display: block;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(48px, 7vw, 88px);
  line-height: 1.02;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.08;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.2;
}

.lead {
  max-width: 640px;
  color: var(--muted);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: var(--radius);
  font-weight: 750;
}

.button.primary {
  background: var(--green);
  color: #ffffff;
}

.button.secondary {
  border: 1px solid var(--soft);
  background: rgba(255, 255, 255, 0.72);
}

.text-link {
  color: var(--green);
  font-weight: 750;
  text-underline-offset: 3px;
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.section-link {
  margin-top: 4px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 600px;
  margin: 34px 0 0;
}

.hero-stats div,
.feature-item,
.scenario-card,
.spec-grid div,
.faq-list details {
  border: 1px solid var(--soft);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.hero-stats div {
  padding: 14px;
}

.hero-stats dt {
  color: var(--muted);
  font-size: 12px;
}

.hero-stats dd {
  margin: 2px 0 0;
  font-weight: 800;
}

.product-stage {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 520px;
  border-radius: 28px;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.95), rgba(232, 238, 233, 0.82)),
    radial-gradient(circle at 70% 32%, rgba(101, 201, 150, 0.18), transparent 36%);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.product-stage.is-hero-render {
  align-content: center;
  min-height: auto;
  aspect-ratio: 16 / 9;
  isolation: isolate;
  padding: 0;
  border-radius: 0;
  background:
    radial-gradient(circle at 54% 54%, rgba(200, 95, 92, 0.18), transparent 28%),
    radial-gradient(circle at 52% 58%, rgba(101, 201, 150, 0.1), transparent 42%);
  box-shadow: none;
  overflow: visible;
}

.product-stage.is-hero-render::after {
  content: none;
}

.product-stage.is-hero-render::before {
  content: "";
  position: absolute;
  left: 13%;
  right: 6%;
  bottom: 10%;
  z-index: 1;
  height: 22%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(72, 42, 36, 0.24), rgba(157, 82, 70, 0.1) 42%, transparent 72%);
  filter: blur(22px);
  transform: rotate(-8deg);
  pointer-events: none;
}

.product-stage img {
  position: relative;
  z-index: 2;
  width: min(106%, 680px);
  filter: drop-shadow(0 30px 54px rgba(16, 24, 23, 0.26));
  animation: productFloat 6s ease-in-out infinite;
}

.product-stage .hero-render {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
  object-position: center;
  box-shadow: none;
  transform: scale(1.045);
  transform-origin: center;
  filter:
    saturate(1.1)
    contrast(1.05)
    drop-shadow(0 50px 62px rgba(95, 39, 35, 0.38));
  animation: none;
}

.signal-ring {
  position: absolute;
  border: 1px solid rgba(101, 201, 150, 0.35);
  border-radius: 999px;
}

.ring-one {
  width: 60%;
  aspect-ratio: 1;
}

.ring-two {
  width: 84%;
  aspect-ratio: 1;
}

.problem p,
.section-head p,
.feature-copy p,
.support-copy p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.dark {
  background: var(--dark);
  color: #edf7f2;
}

.dark .eyebrow {
  color: var(--signal);
}

.dark p {
  color: #9db0aa;
}

.section-muted {
  background: var(--muted-bg);
}

.story.section-muted {
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 251, 244, 0.98), rgba(255, 251, 244, 0) 46%),
    linear-gradient(180deg, #fff8f0 0%, #f2e4d7 100%);
}

.story-grid,
.scenario-grid,
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  max-width: var(--max);
  margin: 36px auto 0;
}

.story-visual {
  position: relative;
  display: grid;
  place-items: center;
  max-width: var(--max);
  min-height: 680px;
  margin: 22px auto 4px;
  overflow: visible;
}

.story-visual::before {
  content: none;
}

.story-visual img {
  position: relative;
  z-index: 1;
  width: min(88vw, 960px);
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.story-node,
.trust-grid article {
  min-height: 210px;
  padding: 22px;
  border: 1px solid rgba(220, 229, 221, 0.95);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  transition: border-color 260ms ease, background 260ms ease, transform 260ms ease;
}

.node-index {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--signal);
  font-size: 13px;
  font-weight: 800;
}

.feature-slab {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 36px;
  align-items: start;
}

.feature-list {
  display: grid;
  gap: 12px;
}

.feature-item {
  display: grid;
  gap: 6px;
  padding: 20px;
}

.feature-item span,
.scenario-card p,
.spec-grid span,
.faq-list p,
.site-footer p {
  color: var(--muted);
}

.app-section {
  background: #ffffff;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: var(--max);
  margin: 38px auto 0;
  align-items: end;
}

.phone-shot {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--soft);
  border-radius: var(--radius);
  background: var(--bg);
}

.phone-shot img {
  width: 100%;
  border-radius: 6px;
}

.phone-shot figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

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

.scenario-card {
  min-height: 210px;
  padding: 22px;
}

.specs {
  background: #ffffff;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-width: var(--max);
  margin: 36px auto 0;
}

.spec-grid div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 70px;
  padding: 18px;
}

.spec-grid strong {
  text-align: right;
}

.trust-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.support {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 40px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  padding: 18px 20px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin: 12px 0 0;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 32px;
  border-top: 1px solid var(--soft);
}

.site-footer > p {
  text-align: right;
}

.footer-record {
  color: var(--muted);
  font-size: 14px;
}

.footer-record:hover,
.text-link:hover {
  color: var(--green);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes productFloat {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(0.5deg);
  }
}

@keyframes pulseRing {
  0%,
  100% {
    opacity: 0.24;
    transform: scale(0.9);
  }
  50% {
    opacity: 0.72;
    transform: scale(1.08);
  }
}

@keyframes signalTravel {
  0% {
    left: 0;
    opacity: 0;
    transform: scale(0.7);
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    left: calc(100% - 10px);
    opacity: 0;
    transform: scale(1);
  }
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 18px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--soft);
    border-radius: var(--radius);
    background: var(--paper);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px;
  }

  .hero,
  .feature-slab,
  .support {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 60px;
    width: 100%;
  }

  .product-stage {
    min-height: 420px;
  }

  .story-grid,
  .scenario-grid,
  .app-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 680px) {
  .section-band,
  .section-narrow {
    padding: 70px 18px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 34px;
  }

  .lead,
  .problem p,
  .section-head p,
  .feature-copy p,
  .support-copy p {
    font-size: 16px;
  }

  .hero-stats,
  .story-grid,
  .scenario-grid,
  .app-grid,
  .spec-grid,
  .trust-grid {
    grid-template-columns: 1fr;
  }

  .product-stage {
    min-height: 340px;
    border-radius: 18px;
  }

  .story-visual {
    min-height: 360px;
  }

  .story-visual img {
    width: 92%;
  }

  .spec-grid div {
    align-items: flex-start;
    flex-direction: column;
  }

  .spec-grid strong {
    text-align: left;
  }

  .site-footer {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-footer > p {
    text-align: center;
  }
}

@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;
  }

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