:root {
  color-scheme: light;
  --ink: #10221b;
  --muted: #5f7068;
  --line: #dce7e0;
  --surface: #ffffff;
  --canvas: #f4faf6;
  --brand: #087f5b;
  --brand-dark: #045c42;
  --brand-soft: #d8f4e7;
  --accent: #e66b2c;
  --shadow: 0 18px 50px rgba(19, 62, 46, 0.12);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--canvas);
  font-size: 16px;
  line-height: 1.7;
}

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

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

.shell {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 231, 224, 0.86);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand span {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand strong {
  font-size: 20px;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #394a42;
  font-size: 14px;
}

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

.nav-download {
  padding: 9px 17px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff !important;
}

.hero {
  overflow: hidden;
  padding: 84px 0 72px;
  background: #eef8f3;
  border-bottom: 1px solid #d8e8de;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.75fr);
  align-items: center;
  gap: 64px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 12px;
  border: 1px solid #bfddcd;
  border-radius: 999px;
  background: #fff;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #11a36f;
}

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

h1 {
  max-width: 680px;
  margin: 22px 0 20px;
  font-size: clamp(46px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 28px;
  color: #43564d;
  font-size: 19px;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 750;
  transition:
    transform 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 12px 28px rgba(8, 127, 91, 0.22);
}

.button-primary:hover {
  background: var(--brand-dark);
}

.button-secondary {
  border-color: #bfd3c7;
  background: #fff;
  color: #31483e;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 20px;
  color: #5e7067;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 610px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-frame {
  width: min(292px, 74vw);
  padding: 10px;
  border: 1px solid #c7d9ce;
  border-radius: 42px;
  background: #111;
  box-shadow: 0 32px 75px rgba(20, 57, 42, 0.24);
  transform: rotate(2deg);
}

.phone-frame img {
  width: 100%;
  border-radius: 32px;
}

.floating-note {
  position: absolute;
  width: 176px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow);
}

.floating-note strong,
.floating-note span {
  display: block;
}

.floating-note strong {
  font-size: 14px;
}

.floating-note span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.floating-note-top {
  top: 65px;
  left: 0;
}

.floating-note-bottom {
  right: 0;
  bottom: 55px;
}

.trust-band {
  background: var(--brand-dark);
  color: #fff;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 24px 0;
}

.trust-grid > div {
  padding: 0 28px;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.trust-grid > div:first-child {
  border-left: 0;
  padding-left: 0;
}

.trust-grid strong,
.trust-grid span {
  display: block;
}

.trust-grid strong {
  font-size: 24px;
}

.trust-grid span {
  color: #cde8da;
  font-size: 13px;
}

.section {
  padding: 96px 0;
}

.section-muted {
  background: #fff;
  border-block: 1px solid var(--line);
}

.section-heading {
  max-width: 740px;
  margin-bottom: 42px;
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.section-heading > p:last-child,
.safety-grid > div:first-child > p {
  color: var(--muted);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.feature-card:hover {
  border-color: #a9d1bd;
  box-shadow: 0 14px 36px rgba(20, 72, 51, 0.08);
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 30px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3,
.steps h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

.feature-card p,
.steps p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 0;
  list-style: none;
}

.steps li {
  display: flex;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--canvas);
}

.steps li > span {
  flex: 0 0 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.notice {
  margin-top: 28px;
  padding: 22px 24px;
  border-left: 5px solid var(--accent);
  border-radius: 8px;
  background: #fff7f0;
}

.notice strong {
  display: block;
  margin-bottom: 5px;
}

.notice p {
  margin-bottom: 0;
  color: #6e5849;
}

.screens-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.screens-grid figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.screens-grid img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

.screens-grid figcaption {
  padding: 13px 15px;
  color: #42544b;
  font-size: 14px;
}

.safety-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  align-items: center;
  gap: 64px;
}

.text-link {
  color: var(--brand);
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

.safety-list > div {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--canvas);
}

.safety-list strong,
.safety-list span {
  display: block;
}

.safety-list span {
  color: var(--muted);
  font-size: 14px;
}

.download-section {
  padding: 72px 0;
  background: #087f5b;
  color: #fff;
}

.download-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.download-panel .eyebrow {
  color: #bdebd6;
}

.download-panel h2 {
  margin-bottom: 8px;
}

.download-panel p {
  margin-bottom: 0;
  color: #d5f2e4;
}

.download-actions {
  max-width: 600px;
  justify-content: flex-end;
}

.button-light {
  flex: 0 0 auto;
  background: #fff;
  color: var(--brand-dark);
}

.button-outline-light {
  flex: 0 0 auto;
  border-color: rgba(255, 255, 255, 0.55);
  background: transparent;
  color: #fff;
}

.download-actions > span {
  color: #ccebdc;
  font-size: 13px;
}

.download-actions code {
  width: 100%;
  overflow-wrap: anywhere;
  color: #ccebdc;
  font-size: 11px;
  text-align: right;
}

.email-link {
  width: 100%;
  color: #fff;
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.tutorial-list {
  display: grid;
  gap: 14px;
  counter-reset: tutorial;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 24px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.tutorial-number {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 16px;
  font-weight: 900;
}

.tutorial-step h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.tutorial-step p {
  margin-bottom: 10px;
  color: var(--muted);
}

.tutorial-step p:last-child {
  margin-bottom: 0;
}

.tutorial-tip {
  display: inline-block;
  margin-top: 4px;
  padding: 7px 10px;
  border-left: 3px solid var(--brand);
  border-radius: 4px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 13px;
}

.faq-shell {
  max-width: 900px;
}

details {
  border-top: 1px solid var(--line);
}

details:last-child {
  border-bottom: 1px solid var(--line);
}

summary {
  padding: 22px 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 750;
}

details p {
  max-width: 800px;
  padding: 0 0 22px;
  color: var(--muted);
}

.site-footer {
  padding: 54px 0 28px;
  background: #10221b;
  color: #e6f1eb;
}

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}

.footer-brand small,
.footer-grid p {
  color: #9db4a8;
}

.footer-grid p {
  max-width: 480px;
  margin: 18px 0 0;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.footer-links a:hover {
  color: #8ee1bd;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid #2c4137;
  color: #8ea79b;
  font-size: 12px;
}

@media (max-width: 960px) {
  .hero-grid,
  .safety-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 540px;
  }

  .feature-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .screens-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .download-panel {
    align-items: flex-start;
    flex-direction: column;
  }

  .download-actions {
    justify-content: flex-start;
    text-align: left;
  }

  .download-actions code {
    text-align: left;
  }
}

@media (max-width: 700px) {
  .shell {
    width: min(100% - 28px, 1160px);
  }

  .site-header {
    position: static;
  }

  .header-inner {
    min-height: 64px;
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 58px 0 46px;
  }

  .hero-grid {
    gap: 42px;
  }

  .hero-copy,
  .hero-visual {
    min-width: 0;
    max-width: 100%;
  }

  h1 {
    font-size: clamp(40px, 13vw, 58px);
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-visual {
    width: 100%;
    min-height: 500px;
    overflow: hidden;
  }

  .phone-frame {
    width: min(280px, calc(100vw - 58px));
  }

  .floating-note {
    display: none;
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 0;
  }

  .trust-grid > div:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }

  .section {
    padding: 68px 0;
  }

  .feature-grid,
  .steps,
  .screens-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-step {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px;
  }

  .tutorial-number {
    width: 42px;
    height: 42px;
  }

  .screens-grid {
    max-width: 340px;
    margin-inline: auto;
  }

  .download-actions .button {
    width: 100%;
  }

  .footer-grid,
  .footer-bottom {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}