:root {
  color-scheme: light dark;
  --page: #f5f8f4;
  --page-soft: #eef5ef;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --ink: #17201d;
  --ink-soft: #56635f;
  --line: rgba(23, 32, 29, 0.12);
  --brand: #16795d;
  --brand-strong: #0f644d;
  --brand-soft: #dff3e9;
  --lime: #b7ef56;
  --peach: #ffb08d;
  --yellow: #f7d773;
  --sky: #96d5dd;
  --shadow: 0 26px 80px rgba(21, 61, 48, 0.13);
  --shell: min(1160px, calc(100% - 40px));
  --radius: 28px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 8% 3%, rgba(183, 239, 86, 0.19), transparent 24rem),
    radial-gradient(circle at 94% 18%, rgba(150, 213, 221, 0.20), transparent 27rem),
    var(--page);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

img {
  max-width: 100%;
  height: auto;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--page);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid transparent;
  background: rgba(245, 248, 244, 0.78);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
}

.brand img,
.footer-brand img {
  border-radius: 12px;
  box-shadow: 0 8px 22px rgba(27, 100, 70, 0.18);
}

nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

nav a {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--brand);
}

.nav-support {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.hero {
  min-height: 700px;
  padding-block: 74px 92px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 72px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1,
.support-hero h1 {
  margin: 0;
  font-size: clamp(46px, 6.2vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.hero h1 span {
  color: var(--brand);
}

.hero-lead {
  max-width: 650px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.75;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  padding: 12px 21px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 780;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

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

.button.primary {
  background: var(--brand);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(22, 121, 93, 0.22);
}

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

.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--ink);
}

.trust-list {
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--ink-soft);
  font-size: 13px;
  list-style: none;
}

.trust-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  display: inline-block;
  background: var(--brand);
}

.hero-visual {
  position: relative;
  min-height: 510px;
  display: grid;
  place-items: center;
}

.icon-stage {
  position: relative;
  width: min(430px, 88vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.icon-stage::before {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 43%;
  background: linear-gradient(145deg, rgba(183, 239, 86, 0.45), rgba(150, 213, 221, 0.35));
  filter: blur(44px);
}

.app-icon {
  position: relative;
  z-index: 2;
  width: 76%;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 28%;
  box-shadow: 0 42px 92px rgba(29, 88, 68, 0.28);
  transform: rotate(2.5deg);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(22, 121, 93, 0.22);
  border-radius: 50%;
}

.orbit::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 7px rgba(183, 239, 86, 0.18);
}

.orbit-one {
  inset: 0;
  transform: rotate(-18deg);
}

.orbit-one::before {
  top: 17%;
  right: 5%;
}

.orbit-two {
  inset: 8%;
  transform: rotate(52deg);
}

.orbit-two::before {
  bottom: 8%;
  left: 17%;
  background: var(--peach);
  box-shadow: 0 0 0 7px rgba(255, 176, 141, 0.17);
}

.status-card {
  position: absolute;
  z-index: 4;
  right: -14px;
  bottom: 12px;
  width: min(370px, 90%);
  padding: 17px 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 21px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: rgba(255, 255, 255, 0.80);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.status-card p {
  margin: 0 0 3px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.status-card strong {
  display: block;
  font-size: 14px;
  line-height: 1.4;
}

.status-value {
  flex: 0 0 auto;
  padding: 8px 11px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 12px;
  font-weight: 850;
}

.statement-section {
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.43);
}

.statement-grid {
  padding-block: 72px;
  display: grid;
  grid-template-columns: 0.5fr 1.15fr 0.8fr;
  align-items: start;
  gap: 46px;
}

.statement-grid blockquote {
  margin: 0;
  font-size: clamp(27px, 3.5vw, 43px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.04em;
}

.statement-grid > p:last-child {
  margin: 2px 0 0;
  color: var(--ink-soft);
}

.section {
  padding-block: 112px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 48px;
}

.section-heading.compact {
  margin-bottom: 30px;
}

.section-heading h2,
.privacy-copy h2,
.support-callout h2,
.policy-callout h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 54px);
  line-height: 1.18;
  letter-spacing: -0.045em;
}

.section-heading > p:last-child,
.privacy-copy > p,
.support-callout p,
.policy-callout p {
  color: var(--ink-soft);
}

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

.feature-card {
  position: relative;
  min-height: 280px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.feature-card-wide {
  min-height: 340px;
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr minmax(290px, 0.8fr);
  align-items: center;
  gap: 28px;
}

.feature-card-accent {
  background: linear-gradient(145deg, #173f35, #1a6954);
  color: #f5fff9;
}

.feature-card-accent p,
.feature-card-accent .feature-number {
  color: rgba(245, 255, 249, 0.75);
}

.feature-number {
  color: var(--brand);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.feature-card h3 {
  margin: 20px 0 12px;
  font-size: 24px;
  line-height: 1.3;
}

.feature-card-wide h3 {
  margin-top: 0;
  font-size: clamp(27px, 3vw, 38px);
}

.feature-card p {
  margin: 0;
  color: var(--ink-soft);
}

.dimension-cloud {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
}

.dimension-cloud span {
  padding: 17px 8px;
  border-radius: 18px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.dimension-cloud span:nth-child(2),
.dimension-cloud span:nth-child(5) {
  background: #fff0e8;
  color: #975033;
}

.dimension-cloud span:nth-child(3),
.dimension-cloud span:nth-child(6) {
  background: #fff7d7;
  color: #7b661c;
}

.privacy-section {
  border-block: 1px solid rgba(255, 255, 255, 0.12);
  background: #14251f;
  color: #f4fff8;
}

.privacy-layout {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: start;
  gap: 82px;
}

.privacy-copy > p {
  color: rgba(244, 255, 248, 0.70);
}

.text-link {
  margin-top: 18px;
  display: inline-flex;
  gap: 8px;
  color: var(--lime);
  font-weight: 760;
}

.boundary-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  list-style: none;
}

.boundary-list li {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.055);
}

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

.boundary-list span {
  margin-top: 4px;
  color: rgba(244, 255, 248, 0.63);
  font-size: 14px;
}

.support-callout,
.policy-callout {
  margin-block: 70px;
  padding: 50px;
  border: 1px solid var(--line);
  border-radius: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  background:
    radial-gradient(circle at 88% 30%, rgba(183, 239, 86, 0.25), transparent 15rem),
    var(--surface-strong);
  box-shadow: var(--shadow);
}

.support-callout > div,
.policy-callout > div {
  max-width: 720px;
}

.site-footer {
  padding-block: 44px;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 36px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.footer-brand strong,
.footer-brand span {
  display: block;
}

.footer-brand span,
.copyright {
  color: var(--ink-soft);
  font-size: 13px;
}

.footer-links {
  display: flex;
  gap: 22px;
}

.footer-links a {
  color: var(--ink-soft);
  font-size: 14px;
}

.copyright {
  margin: 0;
}

/* Support page */
.support-main {
  min-height: 70vh;
}

.support-hero {
  padding-block: 92px 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 58px;
}

.support-hero > div {
  max-width: 760px;
}

.support-hero h1 {
  font-size: clamp(44px, 6vw, 72px);
}

.support-hero p:last-child {
  max-width: 680px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 19px;
}

.support-hero img {
  flex: 0 0 auto;
  width: 180px;
  border-radius: 36px;
  box-shadow: var(--shadow);
  transform: rotate(3deg);
}

.support-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 18px;
}

.contact-card,
.feedback-card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-card {
  background: linear-gradient(145deg, #173f35, #1a6954);
  color: #f5fff9;
}

.contact-card .section-kicker {
  color: var(--lime);
}

.email-link {
  overflow-wrap: anywhere;
  color: #ffffff;
  font-size: clamp(20px, 2.4vw, 29px);
  font-weight: 800;
}

.contact-card > p:last-child {
  margin: 20px 0 0;
  color: rgba(245, 255, 249, 0.68);
}

.feedback-card ul {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  list-style: none;
}

.feedback-card li {
  padding: 15px;
  border-radius: 16px;
  background: var(--page-soft);
  color: var(--ink-soft);
  font-size: 14px;
}

.feedback-card li span {
  margin-right: 8px;
  color: var(--brand);
  font-size: 11px;
  font-weight: 850;
}

.privacy-note {
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.faq-section {
  padding-bottom: 70px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 24px 48px 24px 0;
  cursor: pointer;
  font-size: 18px;
  font-weight: 760;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 23px;
  right: 6px;
  color: var(--brand);
  font-size: 27px;
  font-weight: 400;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 850px;
  margin: -6px 0 24px;
  color: var(--ink-soft);
}

.policy-callout {
  margin-top: 0;
}

:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 4px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #101713;
    --page-soft: #18241f;
    --surface: rgba(28, 39, 34, 0.84);
    --surface-strong: #1b2722;
    --ink: #eff8f3;
    --ink-soft: #aebdb6;
    --line: rgba(238, 248, 242, 0.13);
    --brand: #70d2ad;
    --brand-strong: #8be1c0;
    --brand-soft: #193d31;
    --shadow: 0 26px 80px rgba(0, 0, 0, 0.28);
  }

  .site-header {
    background: rgba(16, 23, 19, 0.80);
  }

  .button.primary {
    color: #082a1f;
  }

  .button.primary:hover {
    background: #8be1c0;
  }

  .status-card {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(25, 37, 32, 0.83);
  }

  .dimension-cloud span:nth-child(2),
  .dimension-cloud span:nth-child(5) {
    background: #482b22;
    color: #ffc0a6;
  }

  .dimension-cloud span:nth-child(3),
  .dimension-cloud span:nth-child(6) {
    background: #403a1c;
    color: #f7df86;
  }

  .privacy-section,
  .contact-card,
  .feature-card-accent {
    background: #101e19;
  }
}

@media (max-width: 880px) {
  .hero {
    min-height: auto;
    padding-block: 56px 72px;
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-copy {
    max-width: 720px;
  }

  .hero-visual {
    min-height: 440px;
  }

  .statement-grid,
  .privacy-layout {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .statement-grid blockquote {
    max-width: 700px;
  }

  .feature-card-wide {
    grid-template-columns: auto 1fr;
  }

  .feature-card-wide .dimension-cloud {
    grid-column: 1 / -1;
  }

  .support-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr auto;
  }

  .copyright {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: min(100% - 28px, 1160px);
    --radius: 22px;
  }

  .nav-wrap {
    min-height: 66px;
  }

  .brand span {
    display: none;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  nav {
    gap: 14px;
  }

  nav a:not(.nav-support) {
    display: none;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1,
  .support-hero h1 {
    font-size: clamp(42px, 13vw, 60px);
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions .button {
    flex: 1 1 170px;
  }

  .hero-visual {
    min-height: 370px;
  }

  .status-card {
    right: 0;
  }

  .section {
    padding-block: 78px;
  }

  .statement-grid {
    padding-block: 54px;
  }

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

  .feature-card-wide {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .feature-card-wide .dimension-cloud {
    grid-column: auto;
  }

  .feature-card {
    min-height: auto;
    padding: 24px;
  }

  .dimension-cloud span {
    padding: 13px 5px;
  }

  .support-callout,
  .policy-callout {
    margin-block: 32px;
    padding: 30px 24px;
    border-radius: 25px;
    align-items: flex-start;
    flex-direction: column;
  }

  .support-callout .button,
  .policy-callout .button {
    width: 100%;
  }

  .support-hero {
    padding-block: 58px 42px;
    align-items: flex-start;
    flex-direction: column-reverse;
    gap: 28px;
  }

  .support-hero img {
    width: 100px;
    border-radius: 22px;
  }

  .support-hero p:last-child {
    font-size: 16px;
  }

  .contact-card,
  .feedback-card {
    padding: 24px;
  }

  .feedback-card ul {
    grid-template-columns: 1fr;
  }

  .faq-list summary {
    font-size: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .copyright {
    grid-column: auto;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .site-footer {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .section,
  .support-hero {
    padding-block: 30px;
  }
}