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

html {
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  background: #f7f4ec;
  color: #243044;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

h1,
h2,
h3,
h4,
.logo-name,
.section-index,
.quote-name {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 600;
  color: #0b1f3a;
}

p {
  margin: 0 0 16px;
}

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

a {
  color: #0b1f3a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  color: #c9a227;
}

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

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: #0b1f3a;
  border-bottom: 2px solid #c9a227;
}

.header-bar {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #f7f4ec;
}

.brand:hover {
  color: #c9a227;
}

.logo-mark {
  flex-shrink: 0;
}

.logo-name {
  font-size: 20px;
  letter-spacing: 0.06em;
  color: inherit;
  line-height: 1.2;
}

.logo-tag {
  display: block;
  margin-top: 2px;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #c9a227;
}

.site-nav ul {
  display: flex;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}

.site-nav a {
  display: inline-block;
  padding: 26px 16px 22px;
  color: #f7f4ec;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.site-nav a:hover {
  color: #c9a227;
}

.site-nav a.active {
  color: #c9a227;
  border-bottom-color: #c9a227;
}

.hero {
  background: #0b1f3a;
  color: #f7f4ec;
}

.hero-grid {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.hero-copy {
  flex: 1 1 0;
  min-width: 0;
}

.hero h1 {
  margin: 0 0 20px;
  color: #f7f4ec;
  font-size: 34px;
  line-height: 1.35;
}

.hero p {
  color: #d9d3c4;
  font-size: 16px;
  margin-bottom: 16px;
}

.hero-actions {
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn,
button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 15px 22px;
  border: 1px solid transparent;
  background: #c9a227;
  color: #0b1f3a;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  border-radius: 0;
}

.btn:hover,
button.btn:hover {
  background: #d8b23a;
  color: #0b1f3a;
}

.btn-secondary,
a.btn-secondary,
button.btn-secondary {
  background: transparent;
  color: #c9a227;
  border-color: #c9a227;
}

.btn-secondary:hover,
a.btn-secondary:hover,
button.btn-secondary:hover {
  background: rgba(201, 162, 39, 0.14);
  color: #e0c056;
}

.btn-navy,
button.btn-navy {
  background: #0b1f3a;
  color: #f7f4ec;
  border-color: #0b1f3a;
}

.btn-navy:hover,
button.btn-navy:hover {
  background: #16325c;
  color: #f7f4ec;
}

.btn:disabled,
button:disabled,
button.btn:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  background: #9a8a55;
  color: #3a341c;
  border-color: #9a8a55;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn-row .btn {
  width: auto;
  min-width: 200px;
}

.section {
  padding: 64px 0;
}

.section + .section {
  border-top: 1px solid #ddd4c0;
}

.section-head {
  margin-bottom: 28px;
}

.section-index {
  margin: 0 0 8px;
  color: #c9a227;
  font-size: 20px;
  letter-spacing: 0.16em;
}

.section h2 {
  margin: 0 0 16px;
  font-size: 28px;
  line-height: 1.35;
}

.section h3 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.4;
}

.lead {
  font-size: 17px;
}

.split {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 48px;
}

.split:last-child {
  margin-bottom: 0;
}

.split-copy {
  flex: 1 1 0;
  min-width: 0;
}

.split-visual {
  flex: 0 0 300px;
  background: #0b1f3a;
  padding: 28px;
}

.split-visual svg {
  margin: 0 auto;
}

.split.reverse {
  flex-direction: row-reverse;
}

.platform-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid #ddd4c0;
}

.platform-item {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid #ddd4c0;
}

.platform-icon {
  flex: 0 0 64px;
  background: #0b1f3a;
  padding: 14px;
}

.platform-copy {
  flex: 1 1 0;
  min-width: 0;
}

.platform-copy h3 {
  margin-top: 0;
}

.platform-copy .btn {
  width: auto;
  min-width: 180px;
  margin-top: 12px;
}

.stat-table {
  width: 100%;
  border-collapse: collapse;
  background: #fffdf6;
}

.stat-table th,
.stat-table td {
  border: 1px solid #ddd4c0;
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

.stat-table th {
  background: #0b1f3a;
  color: #f7f4ec;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 600;
  width: 28%;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: #fffdf6;
}

.compare-table th,
.compare-table td {
  border: 1px solid #ddd4c0;
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  background: #0b1f3a;
  color: #f7f4ec;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
}

.compare-table tbody th {
  background: #efe8d4;
  color: #0b1f3a;
  font-weight: 600;
  width: 22%;
}

.review-grid {
  display: flex;
  gap: 20px;
  align-items: stretch;
}

.review-card {
  flex: 1 1 0;
  background: #fffdf6;
  border-left: 4px solid #c9a227;
  padding: 22px 20px 24px;
}

.review-card p {
  margin-bottom: 16px;
}

.quote-name {
  margin: 0;
  font-size: 15px;
  color: #0b1f3a;
}

.quote-role {
  display: block;
  margin-top: 4px;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 13px;
  color: #5a6578;
  font-weight: 400;
}

.faq-list {
  border-top: 1px solid #ddd4c0;
}

.faq-item {
  padding: 22px 0;
  border-bottom: 1px solid #ddd4c0;
}

.faq-item h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.article-block {
  margin-bottom: 40px;
}

.article-block h2 {
  padding-bottom: 10px;
  border-bottom: 2px solid #c9a227;
}

.cta-band {
  margin-top: 36px;
  background: #0b1f3a;
  color: #f7f4ec;
  padding: 32px 36px;
}

.cta-band h2,
.cta-band h3 {
  color: #f7f4ec;
}

.cta-band p {
  color: #d9d3c4;
}

.steps {
  counter-reset: install-step;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}

.step-num {
  flex: 0 0 48px;
  height: 48px;
  background: #0b1f3a;
  color: #c9a227;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body {
  flex: 1 1 0;
}

.site-footer {
  background: #071320;
  color: #c8c2b4;
  padding: 40px 0 28px;
}

.footer-verify {
  color: #c9a227;
  font-size: 15px;
  margin-bottom: 14px;
}

.footer-copy {
  font-size: 13px;
  line-height: 1.7;
  color: #9aa3b0;
}

.footer-nav {
  margin: 16px 0 20px;
}

.footer-nav a {
  color: #d9d3c4;
  margin-right: 18px;
  text-decoration: none;
}

.footer-nav a:hover {
  color: #c9a227;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 860px) {
  .header-bar {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 16px;
    padding-bottom: 0;
    gap: 8px;
  }

  .site-nav {
    width: 100%;
  }

  .site-nav ul {
    justify-content: flex-start;
  }

  .site-nav a {
    padding: 14px 12px 12px;
  }

  .hero-grid,
  .split,
  .split.reverse,
  .review-grid,
  .platform-item {
    flex-direction: column;
  }

  .hero-actions,
  .split-visual {
    flex: 1 1 auto;
    width: 100%;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section {
    padding: 48px 0;
  }
}