:root {
  --bg: #f5faef;
  --bg-soft: #fbfdf8;
  --panel: rgba(255, 255, 255, 0.93);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --text: #203126;
  --muted: #5c6d62;
  --line: rgba(44, 84, 58, 0.12);
  --accent: #2f7b4f;
  --accent-strong: #225e3c;
  --accent-warm: #d3a04d;
  --shadow: 0 24px 60px rgba(42, 75, 53, 0.1);
  --radius: 22px;
  --radius-sm: 14px;
  --container: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(122, 181, 101, 0.12), transparent 30%),
    radial-gradient(circle at right 10% top 18%, rgba(228, 191, 113, 0.16), transparent 24%),
    linear-gradient(180deg, #fcfef9 0%, #f0f7ea 44%, #f7fbf3 100%);
  line-height: 1.7;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  clip: auto;
  width: auto;
  height: auto;
  margin: 1rem;
  padding: 0.8rem 1rem;
  background: #fff;
  border-radius: 999px;
  z-index: 1000;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.page-shell {
  overflow: clip;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(251, 253, 247, 0.86);
  border-bottom: 1px solid rgba(44, 84, 58, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(39, 76, 50, 0.18);
}

.brand-copy {
  display: grid;
  gap: 0.15rem;
}

.brand-copy strong {
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--accent-strong);
  font-weight: 800;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.84rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.96rem;
  transition: color 0.24s ease, transform 0.24s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-warm), var(--accent));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--accent-strong);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.nav-cta {
  position: relative;
  overflow: hidden;
  padding: 0.78rem 1.1rem;
  background: var(--accent);
  color: #fff !important;
  border-radius: 999px;
  box-shadow: 0 12px 24px rgba(47, 123, 79, 0.18);
}

.nav-cta::before,
.button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.18) 30%, transparent 62%);
  transform: translateX(-120%);
  transition: transform 0.55s ease;
  pointer-events: none;
}

.nav-cta:hover::before,
.nav-cta:focus-visible::before,
.button:hover::before,
.button:focus-visible::before {
  transform: translateX(120%);
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.24s ease, box-shadow 0.24s ease, transform 0.24s ease, background 0.24s ease;
}

.nav-toggle span:not(.sr-only) {
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transform-origin: center;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle:hover,
.nav-toggle:focus-visible,
.nav-toggle.is-open {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(47, 123, 79, 0.22);
  box-shadow: 0 12px 26px rgba(47, 123, 79, 0.14);
  transform: translateY(-1px);
}

.hero {
  position: relative;
  padding: 5rem 0 3.5rem;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(62, 124, 83, 0.1), transparent 40%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 100%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 2rem;
  align-items: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.8rem;
  color: var(--accent-strong);
  font-weight: 700;
  letter-spacing: 0;
  font-size: 0.95rem;
}

.hero-copy .eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.hero-copy .eyebrow::before,
.section-kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent-warm), var(--accent));
  box-shadow: 0 0 0 4px rgba(47, 123, 79, 0.08);
}

.hero h1,
.section h2,
.cta-band h2 {
  margin: 0;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
  color: var(--accent-strong);
  text-wrap: balance;
}

.hero h1 {
  font-size: clamp(2.25rem, 4.6vw, 4.1rem);
  margin-bottom: 1rem;
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.34);
}

.hero-subtitle {
  margin: 0;
  max-width: 60ch;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin: 1.8rem 0 1.4rem;
}

.button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.88rem 1.3rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-4px) scale(1.01);
}

.button-primary {
  background: linear-gradient(180deg, #397f53, #295f40);
  color: #fff;
  box-shadow: 0 16px 28px rgba(47, 123, 79, 0.22);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 26px 40px rgba(47, 123, 79, 0.34);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(47, 123, 79, 0.14);
  color: var(--accent-strong);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(47, 123, 79, 0.3);
  box-shadow: 0 22px 36px rgba(42, 75, 53, 0.16);
}

.hero-points {
  display: grid;
  gap: 0.8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 1.2rem;
  color: var(--text);
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-warm);
}

.hero-media,
.feature-media,
.strip-card,
.highlight-card,
.stat-card,
.feature-card,
.guide-panel,
.timeline-item,
.faq-item {
  background: var(--panel);
  border: 1px solid rgba(44, 84, 58, 0.08);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.hero-media {
  padding: 1rem;
  border-radius: calc(var(--radius) + 6px);
}

.hero-media img {
  width: 100%;
  border-radius: calc(var(--radius) - 4px);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.35s ease;
}

.hero-media figcaption,
.strip-card figcaption {
  margin-top: 0.8rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.summary {
  padding-bottom: 1rem;
}

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

.stat-card {
  border-radius: var(--radius);
  padding: 1.4rem;
}

.stat-card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.7rem;
  color: #1d3727;
}

.stat-card p {
  margin: 0;
  color: var(--muted);
}

.section {
  padding: 5rem 0;
}

main section[id] {
  scroll-margin-top: 104px;
}

.section-soft {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.62), rgba(243, 248, 237, 0.5));
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem;
  align-items: center;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading h2,
.section-copy h2,
.cta-band h2 {
  font-size: clamp(1.72rem, 3.4vw, 2.6rem);
  margin-bottom: 1rem;
}

.section-heading h2,
.section-copy h2 {
  max-width: 18ch;
}

.section-heading p,
.section-copy p,
.highlight-copy p,
.cta-band p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.tag-row span {
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: rgba(47, 123, 79, 0.08);
  border: 1px solid rgba(47, 123, 79, 0.12);
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 800;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.feature-media-wide img,
.strip-card img,
.highlight-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.feature-media {
  overflow: hidden;
  border-radius: var(--radius);
}

.feature-media img,
.strip-card img,
.highlight-media img {
  transition: transform 0.5s ease, filter 0.35s ease;
}

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

.feature-card {
  padding: 1.4rem;
  border-radius: var(--radius);
}

.feature-card h3,
.guide-panel h3,
.timeline-content h3,
.highlight-copy h3 {
  margin: 0 0 0.75rem;
  font-size: 1.18rem;
  color: #1d3727;
}

.feature-card p,
.guide-panel li,
.timeline-content p {
  margin: 0;
  color: var(--muted);
}

.media-strip {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 1rem;
  margin-top: 1rem;
}

.strip-card {
  overflow: hidden;
  border-radius: var(--radius);
  padding: 0.85rem;
}

.guide-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.guide-panel {
  border-radius: var(--radius);
  padding: 1.5rem;
}

.guide-panel ol,
.guide-panel ul {
  margin: 0;
  padding-left: 1.2rem;
}

.guide-panel li + li {
  margin-top: 0.55rem;
}

.highlight-card {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1.2rem;
  margin-top: 1rem;
  padding: 1rem;
  border-radius: calc(var(--radius) + 4px);
}

.highlight-copy {
  padding: 1rem;
}

.highlight-media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius);
}

.timeline-version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  background: linear-gradient(180deg, rgba(47, 123, 79, 0.11), rgba(47, 123, 79, 0.04));
  border: 1px solid rgba(47, 123, 79, 0.12);
  border-radius: 18px;
  color: var(--accent-strong);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.timeline-content p + p {
  margin-top: 0.35rem;
}

.faq-question {
  transition: background 0.22s ease, color 0.22s ease;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-item {
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.35rem;
  background: transparent;
  border: 0;
  color: #1d3426;
  font-weight: 800;
  cursor: pointer;
  position: relative;
}

.text-mark {
  color: var(--accent-strong);
  font-weight: 800;
}

.text-mark-strong {
  color: #274331;
  font-weight: 800;
}

.hero-subtitle .text-mark,
.section-copy .text-mark,
.section-heading .text-mark,
.feature-card .text-mark,
.guide-panel .text-mark,
.faq-answer .text-mark,
.cta-inner .text-mark,
.stat-card .text-mark,
.hero-points .text-mark {
  background: linear-gradient(180deg, transparent 58%, rgba(201, 139, 60, 0.16) 58%);
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 1.35rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-strong);
  font-size: 1.4rem;
  line-height: 1;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.26s ease;
}

.faq-answer > p {
  overflow: hidden;
  margin: 0;
  padding: 0 1.35rem 0;
  color: var(--muted);
}

.faq-item.is-open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-item.is-open .faq-answer > p {
  padding-bottom: 1.25rem;
}

.cta-band {
  padding: 1rem 0 5rem;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.6rem 1.75rem;
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(135deg, rgba(61, 120, 81, 0.92), rgba(92, 154, 114, 0.9)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.12), transparent);
  color: #fff;
  box-shadow: 0 28px 70px rgba(40, 76, 51, 0.18);
}

.cta-inner .section-kicker,
.cta-inner p {
  color: rgba(255, 255, 255, 0.82);
}

.cta-inner .button-primary {
  flex: 0 0 auto;
  background: linear-gradient(180deg, #f2c867, #d79a31);
  color: #3b2b0d;
  box-shadow: 0 16px 28px rgba(22, 31, 18, 0.18);
}

.site-footer {
  padding: 0 0 2.5rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(44, 84, 58, 0.12);
}

.footer-inner p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.back-top {
  color: var(--accent-strong);
  font-weight: 700;
  white-space: nowrap;
  transition: color 0.22s ease, transform 0.22s ease;
}

@media (hover: hover) and (pointer: fine) {
  .hero-media:hover,
  .feature-media:hover,
  .strip-card:hover,
  .highlight-card:hover,
  .stat-card:hover,
  .feature-card:hover,
  .guide-panel:hover,
  .timeline-item:hover,
  .faq-item:hover {
    transform: translateY(-10px) scale(1.012);
    border-color: rgba(47, 123, 79, 0.28);
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 34px 72px rgba(36, 67, 47, 0.22);
  }

  .hero-media:hover img,
  .feature-media:hover img,
  .strip-card:hover img,
  .highlight-card:hover img {
    transform: scale(1.055);
    filter: saturate(1.08) contrast(1.02);
  }

  .stat-card:hover h2,
  .feature-card:hover h3,
  .guide-panel:hover h3,
  .timeline-item:hover h3,
  .faq-item:hover .faq-question {
    color: var(--accent-strong);
  }

  .stat-card:hover p,
  .feature-card:hover p,
  .guide-panel:hover li,
  .timeline-item:hover p,
  .faq-item:hover .faq-answer p {
    color: #294233;
  }

  .timeline-item:hover .timeline-version {
    transform: scale(1.06);
    background: linear-gradient(180deg, rgba(47, 123, 79, 0.26), rgba(47, 123, 79, 0.14));
    box-shadow: inset 0 0 0 1px rgba(47, 123, 79, 0.08), 0 12px 24px rgba(47, 123, 79, 0.16);
  }

  .faq-item:hover .faq-question {
    background: rgba(47, 123, 79, 0.08);
  }

  .back-top:hover,
  .back-top:focus-visible {
    color: var(--accent);
    transform: translateY(-3px);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

  .reveal,
  .faq-answer,
  .button,
  .site-nav a {
    transition: none;
  }
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1rem;
    left: 1rem;
    display: grid;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(44, 84, 58, 0.1);
    border-radius: 20px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.22s ease, transform 0.22s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .hero-grid,
  .split-layout,
  .highlight-card,
  .cta-inner,
  .media-strip,
  .feature-grid,
  .guide-layout,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 4rem;
  }

  .cta-inner {
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 1rem));
  }

  .header-inner {
    min-height: 72px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-heading h2,
  .section-copy h2,
  .cta-band h2 {
    font-size: 1.56rem;
  }

  .button {
    width: 100%;
  }

  .stat-card,
  .feature-card,
  .guide-panel,
  .timeline-item,
  .faq-question {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-media,
  .highlight-card,
  .strip-card,
  .cta-inner {
    padding: 0.9rem;
  }

  .section,
  .cta-band {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
}