html {
  scroll-behavior: auto;
}

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

body.s2-body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #16332d;
  background: #f3f7f5;
}

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

a {
  color: #0c7a6b;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #085f54;
}

h1,
h2,
h3 {
  font-weight: 650;
  line-height: 1.35;
  margin: 0 0 0.75em;
  color: #102924;
}

h1 {
  font-size: 1.85rem;
}

h2 {
  font-size: 1.32rem;
}

h3 {
  font-size: 1.05rem;
}

p,
li {
  margin: 0 0 0.9em;
}

p:last-child,
li:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.2em;
}

.s2-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #ffffff;
  border-bottom: 2px solid #0c7a6b;
}

.s2-header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.s2-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: #085f54;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.s2-brand svg {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
}

.s2-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.s2-nav a {
  color: #2c4a44;
  text-decoration: none;
  font-weight: 600;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}

.s2-nav a:hover,
.s2-nav a.is-current {
  color: #0c7a6b;
  border-bottom-color: #0c7a6b;
}

.s2-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.4rem 1.25rem 3rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 1.5rem;
  align-items: start;
}

.s2-main {
  min-width: 0;
}

.s2-aside {
  position: sticky;
  top: 5.4rem;
}

.s2-hero,
.s2-section,
.s2-dlcard,
.s2-panel,
.s2-quote,
.s2-faq-item,
.s2-cta {
  background: #ffffff;
  border: 1px solid #c5d8d2;
  border-radius: 10px;
}

.s2-hero,
.s2-section,
.s2-cta {
  padding: 1.35rem 1.4rem 1.45rem;
  margin-bottom: 1.15rem;
}

.s2-hero {
  background: linear-gradient(180deg, #e7f3ef 0%, #ffffff 58%);
  border-top: 4px solid #0c7a6b;
}

.s2-kicker {
  margin: 0 0 0.45rem;
  color: #0c7a6b;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.s2-lead {
  font-size: 1.02rem;
  color: #2c4a44;
}

.s2-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.s2-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.28rem 0.7rem;
  background: #e7f3ef;
  color: #085f54;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 650;
}

.s2-chip svg {
  width: 14px;
  height: 14px;
}

.s2-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.s2-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border-radius: 8px;
  background: #0c7a6b;
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid #0c7a6b;
}

.s2-btn:hover {
  background: #085f54;
  color: #ffffff;
  border-color: #085f54;
}

.s2-btn-ghost {
  background: #ffffff;
  color: #0c7a6b;
}

.s2-btn-ghost:hover {
  background: #e7f3ef;
  color: #085f54;
}

.s2-btn-line {
  background: #ffffff;
  color: #16332d;
  border-color: #9bb8b0;
}

.s2-btn-line:hover {
  background: #e7f3ef;
  color: #085f54;
  border-color: #0c7a6b;
}

.s2-btn svg {
  width: 16px;
  height: 16px;
}

.s2-dlcard {
  padding: 1.15rem 1.1rem 1.2rem;
  box-shadow: 0 8px 24px rgba(12, 122, 107, 0.08);
}

.s2-dlcard-title {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 750;
  color: #102924;
}

.s2-dlcard p {
  color: #4a635c;
  font-size: 0.92rem;
}

.s2-dlcard .s2-btn {
  width: 100%;
  margin: 0.75rem 0 0.45rem;
}

.s2-dl-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
}

.s2-dl-list a {
  text-decoration: none;
  font-weight: 650;
  font-size: 0.92rem;
}

.s2-note {
  margin-top: 0.75rem;
  padding: 0.65rem 0.7rem;
  background: #e7f3ef;
  border-radius: 6px;
  color: #2c4a44;
  font-size: 0.86rem;
}

.s2-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.s2-panel {
  padding: 0.95rem 1rem;
}

.s2-panel h3 {
  margin-bottom: 0.45rem;
  color: #0c7a6b;
}

.s2-table-wrap {
  overflow-x: auto;
  margin: 0.9rem 0;
}

table.s2-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.s2-table th,
.s2-table td {
  border: 1px solid #c5d8d2;
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}

.s2-table th {
  background: #0c7a6b;
  color: #ffffff;
  font-weight: 650;
}

.s2-table tr:nth-child(even) td {
  background: #eef6f3;
}

.s2-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: s2step;
}

.s2-step {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  margin: 0 0 0.95rem;
  padding: 0.85rem 0.9rem;
  background: #f7fbf9;
  border: 1px solid #c5d8d2;
  border-radius: 8px;
}

.s2-step::before {
  counter-increment: s2step;
  content: counter(s2step);
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: #0c7a6b;
  color: #ffffff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.s2-quote {
  padding: 1rem 1.05rem;
  margin: 0 0 0.85rem;
}

.s2-quote p {
  margin-bottom: 0.55rem;
}

.s2-quote footer {
  color: #4a635c;
  font-size: 0.9rem;
  font-weight: 650;
}

.s2-faq-item {
  padding: 0.95rem 1.05rem;
  margin: 0 0 0.75rem;
}

.s2-faq-q {
  margin: 0 0 0.45rem;
  font-weight: 750;
  color: #102924;
}

.s2-cta {
  background: #e7f3ef;
  border-color: #0c7a6b;
}

.s2-footer {
  background: #16332d;
  color: #d5e8e3;
  padding: 1.4rem 1.25rem 1.7rem;
}

.s2-footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  font-size: 0.9rem;
  line-height: 1.7;
}

.s2-footer p {
  margin: 0 0 0.55rem;
}

.s2-footer p:last-child {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .s2-shell {
    grid-template-columns: 1fr;
  }

  .s2-aside {
    position: static;
    order: -1;
  }

  .s2-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.55rem;
  }
}

@media (max-width: 640px) {
  .s2-header-inner,
  .s2-shell,
  .s2-footer {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .s2-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .s2-hero,
  .s2-section,
  .s2-cta {
    padding: 1.05rem 0.95rem 1.15rem;
  }

  .s2-actions .s2-btn {
    width: 100%;
  }

  h1 {
    font-size: 1.38rem;
  }

  h2 {
    font-size: 1.18rem;
  }
}