:root {
  color-scheme: light;
  --paper: #f5f6f2;
  --surface: #ffffff;
  --ink: #161c1a;
  --muted: #626b67;
  --line: #d8ddd9;
  --green: #27675b;
  --green-deep: #123e36;
  --mint: #dcebe5;
  --coral: #e97d73;
  --coral-soft: #fae7e3;
  --blue: #4f7fa1;
  --sky: #e8f0f5;
  --gold: #b47a25;
  --shadow: 0 28px 80px rgba(19, 37, 32, 0.15);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
  line-height: 1.6;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
}

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

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

a,
summary {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(79, 127, 161, 0.5);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 12px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(216, 221, 217, 0.85);
  background: rgba(245, 246, 242, 0.94);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.5vw, 34px);
  color: var(--muted);
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

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

.nav-source {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: min(790px, calc(100svh - 88px));
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-background,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-background {
  z-index: -3;
  object-fit: cover;
  object-position: 59% 38%;
}

.hero-overlay {
  z-index: -2;
  background: rgba(245, 246, 242, 0.84);
}

.hero-content {
  width: min(700px, calc(100% - 40px));
  margin-left: clamp(20px, 8vw, 132px);
  padding: 58px 0 98px;
}

.overline {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 760;
  text-transform: uppercase;
}

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

h1,
h2 {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 500;
  letter-spacing: 0;
}

h1 {
  max-width: 690px;
  margin-bottom: 22px;
  font-size: 64px;
  line-height: 1.12;
}

h2 {
  margin-bottom: 20px;
  font-size: 42px;
  line-height: 1.24;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lead {
  max-width: 620px;
  margin-bottom: 24px;
  color: #34413d;
  font-size: 19px;
  line-height: 1.75;
}

.detected-platform {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(233, 125, 115, 0.16);
}

.download-button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 12px 18px;
  border: 1px solid var(--green);
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  font-weight: 730;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(39, 103, 91, 0.2);
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.download-button:hover {
  border-color: var(--green-deep);
  background: var(--green-deep);
  transform: translateY(-2px);
}

.primary-download {
  width: min(390px, 100%);
  min-height: 58px;
  padding: 14px 20px;
  font-size: 16px;
}

.download-arrow {
  font-size: 20px;
  font-weight: 400;
}

.download-meta {
  min-height: 22px;
  margin: 9px 0 4px;
  color: var(--muted);
  font-size: 12px;
}

.text-link,
.text-download {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.hero-companion {
  position: absolute;
  right: clamp(18px, 5vw, 76px);
  bottom: 66px;
  width: 180px;
  display: grid;
  justify-items: center;
  gap: 6px;
}

.hero-companion img {
  width: 168px;
  height: 168px;
  object-fit: contain;
  filter: drop-shadow(0 18px 24px rgba(20, 35, 31, 0.18));
}

.hero-companion span {
  padding: 7px 10px;
  border: 1px solid rgba(39, 103, 91, 0.24);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--green-deep);
  font-size: 12px;
  font-weight: 700;
}

.hero-next {
  position: absolute;
  bottom: 22px;
  left: 50%;
  color: var(--green-deep);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transform: translateX(-50%);
}

.release-bar {
  width: 100%;
  min-height: 94px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  align-items: center;
  gap: 30px;
  padding: 20px clamp(20px, 8vw, 132px);
  border-bottom: 1px solid #27423b;
  background: var(--green-deep);
  color: #f7fbf9;
}

.release-bar > div {
  display: grid;
  gap: 2px;
}

.release-label {
  color: #9eb9b1;
  font-size: 11px;
}

.release-bar strong {
  font-size: 14px;
}

.release-bar > a {
  font-size: 13px;
  font-weight: 700;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 110px 0;
}

.section-intro {
  max-width: 780px;
  margin-bottom: 54px;
}

.section-intro > p:last-child,
.agent-copy > p,
.companion-intro > p:last-child {
  color: var(--muted);
  font-size: 17px;
}

.product-frame,
.agent-frame {
  margin: 0;
}

.product-frame {
  overflow: hidden;
  border: 1px solid #cbd4cf;
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.frame-toolbar {
  height: 44px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: #eef1ee;
}

.frame-toolbar span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #b7c0bb;
}

.frame-toolbar span:first-child {
  background: var(--coral);
}

.frame-toolbar span:nth-child(2) {
  background: #dfb45e;
}

.frame-toolbar span:nth-child(3) {
  background: #6aa08f;
}

.frame-toolbar strong {
  margin-left: 8px;
  color: var(--muted);
  font-size: 11px;
}

.product-frame > img {
  width: 100%;
}

.product-frame figcaption,
.agent-frame figcaption {
  padding: 10px 14px;
  color: var(--muted);
  font-size: 11px;
  text-align: right;
}

.experience-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 52px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.experience-points article {
  min-height: 220px;
  padding: 30px clamp(22px, 3vw, 40px);
  border-right: 1px solid var(--line);
}

.experience-points article:first-child {
  padding-left: 0;
}

.experience-points article:last-child {
  padding-right: 0;
  border-right: 0;
}

.experience-points article > span {
  display: block;
  margin-bottom: 40px;
  color: var(--coral);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  font-weight: 700;
}

.experience-points p {
  margin-bottom: 0;
  color: var(--muted);
}

.agent-band {
  width: 100%;
  padding: 104px max(20px, calc((100vw - 1180px) / 2));
  border-top: 1px solid #cbd9e1;
  border-bottom: 1px solid #cbd9e1;
  background: var(--sky);
}

.agent-inner {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(540px, 1.55fr);
  align-items: center;
  gap: clamp(42px, 7vw, 96px);
}

.agent-copy ul {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #c8d6de;
}

.agent-copy li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-bottom: 1px solid #c8d6de;
  color: #4f616a;
}

.agent-copy li::before {
  content: "";
  position: absolute;
  top: 23px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral);
}

.agent-frame {
  overflow: hidden;
  border: 1px solid #bfced6;
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 26px 70px rgba(32, 60, 73, 0.16);
}

.agent-frame img {
  width: 100%;
}

.companion {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(580px, 1.5fr);
  align-items: center;
  gap: clamp(40px, 8vw, 110px);
}

.companion-intro {
  margin-bottom: 0;
}

.companion-states {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.companion-states figure {
  min-width: 0;
  margin: 0;
  text-align: center;
}

.companion-states img {
  width: min(190px, 100%);
  aspect-ratio: 1;
  margin: 0 auto 15px;
  object-fit: contain;
}

.companion-states figcaption {
  display: grid;
  gap: 2px;
}

.companion-states strong {
  font-size: 15px;
}

.companion-states span {
  color: var(--muted);
  font-size: 12px;
}

.download-section {
  border-top: 1px solid var(--line);
}

.download-intro {
  max-width: 740px;
}

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

.download-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.download-card.recommended {
  border-top: 4px solid var(--green);
  padding-top: 27px;
}

.download-card.detected {
  border-color: var(--coral);
  box-shadow: 0 0 0 3px rgba(233, 125, 115, 0.15);
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 34px;
  color: var(--green);
  font-size: 12px;
  font-weight: 760;
}

.recommended-label {
  color: var(--coral);
}

.download-card > p {
  max-width: 520px;
  color: var(--muted);
}

.download-card dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: auto 0 24px;
  padding-top: 24px;
}

.download-card dl div {
  display: grid;
  gap: 2px;
  padding-right: 18px;
  border-right: 1px solid var(--line);
}

.download-card dl div:last-child {
  padding-left: 18px;
  border-right: 0;
}

.download-card dt {
  color: var(--muted);
  font-size: 11px;
}

.download-card dd {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
}

.asset-download {
  width: 100%;
}

.secondary-download {
  border-color: #9eb0a9;
  background: #f8faf8;
  color: var(--green-deep);
  box-shadow: none;
}

.secondary-download:hover {
  color: #fff;
}

.asset-meta {
  min-height: 20px;
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.compact-card {
  grid-column: 1 / -1;
  min-height: 0;
  display: grid;
  grid-template-columns: 0.55fr 1fr auto;
  align-items: center;
  gap: 32px;
}

.compact-card .card-topline {
  margin-bottom: 0;
}

.compact-card h3 {
  margin-bottom: 0;
}

.compact-card > p {
  margin-bottom: 0;
}

.compact-card .text-download {
  white-space: nowrap;
}

.compact-card .asset-meta {
  grid-column: 3;
  margin-top: -22px;
}

.install-note {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
  margin-top: 22px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.install-note p {
  max-width: 760px;
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.install-note > a {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.trust-band {
  width: 100%;
  padding: 88px max(20px, calc((100vw - 1180px) / 2));
  border-top: 1px solid #203b35;
  border-bottom: 1px solid #203b35;
  background: var(--green-deep);
  color: #f4f8f6;
}

.trust-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.15fr auto;
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
}

.trust-inner h2 {
  margin-bottom: 0;
  font-size: 36px;
}

.trust-inner > p {
  margin-bottom: 0;
  color: #b6cac4;
}

.trust-links {
  display: grid;
  gap: 12px;
}

.trust-links a {
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
}

.faq {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(540px, 1.3fr);
  gap: clamp(42px, 8vw, 110px);
}

.faq-intro {
  margin-bottom: 0;
}

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

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

.faq-list summary {
  padding: 21px 2px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
}

.faq-list p {
  max-width: 700px;
  padding: 0 2px 22px;
  color: var(--muted);
}

.closing {
  min-height: 250px;
  display: grid;
  grid-template-columns: 170px 1fr auto;
  align-items: center;
  gap: 38px;
  padding-top: 48px;
  padding-bottom: 48px;
  border-top: 1px solid var(--line);
}

.closing img {
  width: 170px;
  height: 170px;
  object-fit: contain;
}

.closing h2 {
  margin-bottom: 0;
  font-size: 36px;
}

.final-download {
  min-width: 230px;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: end;
  gap: 32px;
  padding: 38px clamp(20px, 5vw, 72px);
  background: var(--ink);
  color: #edf2ef;
  font-size: 12px;
}

.footer-brand {
  display: grid;
  gap: 5px;
}

.footer-brand strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
}

.footer-brand span,
footer > span {
  color: #aeb8b3;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

@media (max-width: 980px) {
  .hero-companion {
    right: 22px;
    width: 140px;
  }

  .hero-companion img {
    width: 132px;
    height: 132px;
  }

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

  .release-bar > a {
    grid-column: 1 / -1;
  }

  .agent-inner,
  .companion,
  .faq,
  .trust-inner {
    grid-template-columns: 1fr;
  }

  .agent-inner {
    gap: 48px;
  }

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

  .trust-links {
    grid-template-columns: repeat(2, minmax(0, max-content));
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 62px;
  }

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

  .nav-source {
    padding-left: 0;
    border-left: 0;
  }

  .hero {
    min-height: 720px;
  }

  .hero-overlay {
    background: rgba(245, 246, 242, 0.9);
  }

  .hero-companion {
    display: none;
  }

  h1 {
    font-size: 50px;
  }

  h2 {
    font-size: 34px;
  }

  .release-bar {
    grid-template-columns: 1fr 1fr;
  }

  .release-bar > div:nth-child(3) {
    display: none;
  }

  .release-bar > a {
    grid-column: auto;
    text-align: right;
  }

  .experience-points,
  .download-options {
    grid-template-columns: 1fr;
  }

  .experience-points article,
  .experience-points article:first-child,
  .experience-points article:last-child {
    min-height: 0;
    padding: 28px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .experience-points article:last-child {
    border-bottom: 0;
  }

  .experience-points article > span {
    margin-bottom: 16px;
  }

  .companion-states {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 14px;
  }

  .compact-card {
    grid-column: auto;
    display: flex;
    align-items: stretch;
  }

  .compact-card .card-topline {
    margin-bottom: 22px;
  }

  .compact-card h3 {
    margin-bottom: 10px;
  }

  .compact-card > p {
    margin-bottom: 22px;
  }

  .compact-card .asset-meta {
    margin-top: 8px;
  }

  .install-note {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .closing {
    grid-template-columns: 110px 1fr;
  }

  .closing img {
    width: 110px;
    height: 110px;
  }

  .closing .download-button {
    grid-column: 1 / -1;
  }

  footer {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding-right: 16px;
    padding-left: 16px;
  }

  .hero {
    min-height: calc(100svh - 62px);
  }

  .hero-background {
    object-position: 67% center;
  }

  .hero-content {
    width: calc(100% - 32px);
    margin-left: 16px;
    padding: 42px 0 90px;
  }

  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 30px;
  }

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

  .primary-download {
    width: 100%;
  }

  .hero-next {
    width: 100%;
    text-align: center;
  }

  .release-bar {
    min-height: 116px;
    gap: 16px;
    padding-right: 16px;
    padding-left: 16px;
  }

  .release-bar > div:nth-child(2) {
    display: none;
  }

  .release-bar > a {
    text-align: right;
  }

  .section {
    width: calc(100% - 32px);
    padding: 78px 0;
  }

  .section-intro {
    margin-bottom: 38px;
  }

  .agent-band,
  .trust-band {
    padding: 76px 16px;
  }

  .companion-states img {
    width: 145px;
  }

  .download-card {
    padding: 22px;
  }

  .download-card.recommended {
    padding-top: 19px;
  }

  .card-topline {
    margin-bottom: 24px;
  }

  .trust-links {
    grid-template-columns: 1fr;
  }

  .closing {
    grid-template-columns: 82px 1fr;
    gap: 18px;
  }

  .closing img {
    width: 82px;
    height: 82px;
  }

  .closing h2 {
    font-size: 26px;
  }
}

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

  .download-button {
    transition: none;
  }
}