:root {
  --bg: #f6f2e7;
  --surface: #fffdf7;
  --surface-2: #fbf8ef;
  --ink: #1d2a22;
  --muted: #6a756c;
  --brand: #2f7a4f;
  --brand-deep: #215c3b;
  --brand-soft: #e4f0e7;
  --accent: #e4b54b;
  --accent-soft: #fbf1d9;
  --line: #e4ded0;
  --danger: #b4472f;
  --shadow-soft: 0 10px 30px rgba(33, 49, 38, 0.07);
  --shadow-paper: 0 18px 45px rgba(35, 45, 38, 0.14);
  --radius: 18px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(900px 620px at 92% -8%, #edf4e8 0%, transparent 60%),
    radial-gradient(700px 520px at -10% 20%, #fbf1d9 0%, transparent 55%),
    var(--bg);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
summary {
  font: inherit;
  color: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--brand-soft);
  color: var(--brand-deep);
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(228, 222, 208, 0.8);
  background: rgba(246, 242, 231, 0.82);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 6px 14px rgba(33, 49, 38, 0.12);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.nav-desktop a {
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 550;
  transition: color 0.16s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-mobile {
  display: none;
  margin-left: auto;
  position: relative;
}

.nav-mobile summary {
  list-style: none;
  cursor: pointer;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  font-size: 13px;
  font-weight: 650;
}

.nav-mobile summary::-webkit-details-marker {
  display: none;
}

.nav-mobile nav {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  display: flex;
  flex-direction: column;
  width: 208px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-paper);
}

.nav-mobile nav a {
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
}

.nav-mobile nav a:hover {
  background: var(--surface-2);
  color: var(--ink);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    background 0.16s ease,
    border-color 0.16s ease,
    box-shadow 0.16s ease;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 22px rgba(47, 122, 79, 0.24);
}

.btn-primary:hover {
  background: var(--brand-deep);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(47, 122, 79, 0.28);
}

.btn-ghost {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: #cfd8cc;
  background: var(--surface-2);
  transform: translateY(-1px);
}

.btn-small {
  padding: 8px 13px;
  font-size: 12.5px;
  border-radius: 10px;
}

.btn-large {
  padding: 15px 26px;
  font-size: 15px;
}

/* ---------- Hero ---------- */

.hero {
  padding: 54px 0 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: 28px;
  min-height: 520px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 247, 0.7);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(47, 122, 79, 0.14);
}

.hero h1 {
  margin: 0;
  font-size: clamp(54px, 7vw, 78px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.045em;
}

.hero .lead {
  margin: 20px 0 0;
  max-width: 22ch;
  font-size: clamp(20px, 2.4vw, 25px);
  font-weight: 650;
  line-height: 1.42;
  letter-spacing: -0.015em;
}

.hero .desc {
  margin: 14px 0 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-meta {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

.hero-visual {
  position: relative;
  min-height: 450px;
}

.hero-glow {
  position: absolute;
  inset: 6% 8% 12%;
  border-radius: 48% 52% 55% 45% / 45% 48% 52% 55%;
  background:
    radial-gradient(circle at 35% 30%, #e4f0e7 0%, transparent 62%),
    linear-gradient(135deg, #fbf1d9, #e4f0e7);
  opacity: 0.9;
  filter: blur(2px);
}

.hero-mascot {
  position: absolute;
  right: 6%;
  top: 2%;
  z-index: 1;
  width: min(330px, 46%);
  height: auto;
  filter: drop-shadow(0 24px 30px rgba(35, 45, 38, 0.16));
}

.hero-shot {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  width: min(430px, 82%);
  margin: 0;
  border: 6px solid #fff;
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-paper);
  transform: rotate(-2.2deg);
  transform-origin: bottom left;
}

.hero-shot img {
  width: 100%;
  height: auto;
  border-radius: 11px;
}

.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 34px;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}

.trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.trust span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sage, #a9c6b2);
  box-shadow: 0 0 0 3px rgba(169, 198, 178, 0.2);
}

/* ---------- Sections ---------- */

.section {
  padding: 92px 0;
  scroll-margin-top: 84px;
}

.section-alt {
  border-block: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.58);
}

.section-head {
  max-width: 740px;
  margin-bottom: 34px;
}

.kicker {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 9px;
  border-radius: 7px;
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 750;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.section-head p:not(.kicker) {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- Features ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 8px 22px rgba(33, 49, 38, 0.04);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease;
}

.feature-card:hover {
  border-color: #cfd8cc;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(33, 49, 38, 0.08);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand-deep);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  margin: 16px 0 0;
  font-size: 15.5px;
  font-weight: 700;
}

.feature-card p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- Screenshots ---------- */

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

.shot {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 8px 22px rgba(33, 49, 38, 0.05);
}

.shot.span-2 {
  grid-column: span 2;
}

.shot a {
  display: block;
  overflow: hidden;
}

.shot img {
  width: 100%;
  height: auto;
  aspect-ratio: 1264 / 781;
  object-fit: cover;
  object-position: top;
  transition: transform 0.35s ease;
}

.shot:hover img {
  transform: scale(1.012);
}

.shot figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}

/* ---------- Download ---------- */

.download-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: start;
  gap: 28px;
}

.download-copy h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 780;
  letter-spacing: -0.03em;
}

.download-copy h2 span {
  color: var(--brand);
}

.download-lead {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.small-note {
  max-width: 58ch;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.small-note a {
  color: var(--brand-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.download-links a {
  color: var(--brand-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.download-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.download-card h3,
.update-aside h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
}

.download-card ol {
  margin: 14px 0 0;
  padding-left: 19px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.75;
}

.download-card li + li {
  margin-top: 7px;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.download-meta span {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

/* ---------- Updates ---------- */

.updates-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
}

.updates-grid h2 {
  margin: 0;
  font-size: clamp(30px, 3.4vw, 40px);
  letter-spacing: -0.03em;
}

.update-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.update-list li {
  position: relative;
  padding-left: 20px;
}

.update-list li + li {
  margin-top: 8px;
}

.update-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(47, 122, 79, 0.14);
}

.text-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--brand-deep);
  font-size: 13px;
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.update-aside {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.update-aside p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

/* ---------- FAQ ---------- */

.faq {
  max-width: 840px;
}

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

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

.faq summary {
  position: relative;
  padding: 18px 34px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 650;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brand);
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
}

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

.faq details p {
  margin: 0;
  padding: 0 34px 18px 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.faq details p a {
  color: var(--brand-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 56px 0 26px;
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 28px;
}

.footer-brand p {
  max-width: 34ch;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.footer-grid h3 {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-grid > div:not(.footer-brand) a {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 12.5px;
}

.footer-grid a:hover {
  color: var(--ink);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

/* ---------- Subpages ---------- */

.page-hero {
  padding: 64px 0 28px;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 52px);
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.page-hero p {
  max-width: 640px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.page-hero .page-meta {
  margin-top: 16px;
  font-size: 12px;
}

.prose {
  max-width: 780px;
  padding-bottom: 72px;
}

.prose h2 {
  margin: 36px 0 10px;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.prose h3 {
  margin: 24px 0 8px;
  font-size: 15.5px;
}

.prose p {
  margin: 10px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.prose ul,
.prose ol {
  margin: 10px 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.prose li + li {
  margin-top: 5px;
}

.prose a {
  color: var(--brand-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose strong {
  color: var(--ink);
}

.prose code {
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-2);
  color: var(--ink);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
}

.timeline {
  max-width: 860px;
  padding-bottom: 72px;
}

.timeline-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item:first-child {
  border-top: 1px solid var(--line);
}

.timeline-date {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.timeline-item h2 {
  margin: 6px 0 0;
  font-size: 21px;
  letter-spacing: -0.015em;
}

.timeline-item ul {
  margin: 10px 0 0;
  padding-left: 19px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.75;
}

.timeline-item li + li {
  margin-top: 5px;
}

.legal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.legal-meta span {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.not-found {
  display: grid;
  place-items: center;
  min-height: 62vh;
  text-align: center;
}

.not-found h1 {
  margin: 0;
  font-size: clamp(64px, 12vw, 120px);
  line-height: 1;
  letter-spacing: -0.06em;
  color: var(--brand);
}

.not-found p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.not-found .btn {
  margin-top: 22px;
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .hero {
    padding-top: 40px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
    gap: 18px;
  }

  .hero-copy {
    max-width: 640px;
  }

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

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

  .download-grid,
  .updates-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 820px) {
  .nav-desktop,
  .header-actions .btn-ghost {
    display: none;
  }

  .nav-mobile {
    display: block;
  }

  .header-actions{
    margin-left: auto;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(var(--container), calc(100% - 36px));
  }

  .section {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: clamp(48px, 14vw, 62px);
  }

  .hero .lead {
    max-width: none;
  }

  .hero-visual {
    min-height: 300px;
  }

  .hero-mascot {
    position: static;
    width: 230px;
    margin-inline: auto;
  }

  .hero-shot {
    display: none;
  }

  .hero-glow {
    inset: 4% 12% 8%;
  }

  .trust {
    gap: 10px 18px;
  }

  .feature-grid,
  .shots {
    grid-template-columns: minmax(0, 1fr);
  }

  .shot.span-2 {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

  .hero-actions .btn,
  .download-actions .btn {
    width: 100%;
  }

  .hero-meta {
    line-height: 1.7;
  }

  .download-card,
  .update-aside {
    padding: 20px;
  }

  .feature-card {
    padding: 20px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}