:root {
  --navy: #0A2F6B;
  --navy-deep: #07244f;
  --gold: #B8860B;
  --gold-hover: #9a7009;
  --bg: #F4F7FB;
  --card: #ffffff;
  --text: #1b2433;
  --muted: #5b6678;
  --line: #d7deea;
  --radius: 12px;
  --max: 1120px;
}

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

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

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

a {
  color: var(--navy);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--gold);
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--navy);
  color: #fff;
  padding: 8px 12px;
  z-index: 20;
}

.skip:focus {
  left: 12px;
}

.site-header {
  background: var(--navy);
  color: #fff;
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand:hover {
  color: var(--gold);
}

.brand-mark {
  flex: 0 0 32px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  position: relative;
  color: #dce6f5;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  transition: color 0.22s ease, background-color 0.22s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: transparent;
  transition: background-color 0.22s ease;
}

.site-nav a:hover,
.site-nav a.is-current {
  color: #fff;
}

.site-nav a.is-current::after,
.site-nav a:hover::after {
  background: var(--gold);
}

.hero {
  background: #ffffff;
  color: var(--text);
  padding: 36px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 20px;
  font-family: "Source Han Serif SC", "Songti SC", "SimSun", serif;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--navy);
}

.hero p {
  margin: 0 0 16px;
  color: var(--muted);
  max-width: 50em;
}

.hero .meta-line {
  color: var(--navy) !important;
  margin-top: 18px;
}

.product-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px !important;
}

.product-chips span {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy);
  font-size: 13px;
  font-weight: 700;
}

.hero-actions,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 22px;
}

.btn-navy {
  background: var(--navy);
  color: #fff;
}

.btn-navy:hover {
  background: var(--navy-deep);
  color: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 10px 22px;
  border-radius: 10px;
  border: 2px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.btn-gold {
  background: var(--gold);
  color: #fff;
}

.btn-gold:hover {
  background: var(--gold-hover);
  color: #fff;
  box-shadow: 0 6px 18px rgba(184, 134, 11, 0.28);
}

.btn-line {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.btn-line:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: #fff;
}

.btn-navy {
  background: var(--navy);
  color: #fff;
}

.btn-navy:hover {
  background: var(--navy-deep);
  color: #fff;
  box-shadow: 0 6px 18px rgba(10, 47, 107, 0.22);
}

.btn-ghost {
  background: #fff;
  color: var(--navy);
  border-color: var(--navy);
}

.btn-ghost:hover {
  background: var(--navy);
  color: #fff;
}

.section {
  padding: 56px 0;
}

.section h2 {
  margin: 0 0 14px;
  color: var(--navy);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.4;
}

.lead,
.section > .wrap > .lead {
  margin: 0 0 28px;
  color: var(--muted);
  max-width: 50em;
}

.grid-3,
.quote-grid,
.stat-grid,
.platform-grid {
  display: grid;
  gap: 18px;
}

.grid-3,
.quote-grid {
  grid-template-columns: repeat(3, 1fr);
}

.platform-grid {
  grid-template-columns: repeat(4, 1fr);
}

.stat-grid {
  grid-template-columns: repeat(4, 1fr);
}

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

.card h3,
.split-text h3,
.prose h3 {
  margin: 12px 0 10px;
  color: var(--navy);
  font-size: 18px;
}

.card p,
.split-text p,
.prose p,
.faq-item p {
  margin: 0 0 12px;
  color: var(--text);
}

.card p:last-child,
.split-text p:last-child,
.prose p:last-child,
.faq-item p:last-child {
  margin-bottom: 0;
}

.ico {
  width: 40px;
  height: 40px;
}

.platform-bar {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.platform-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
  text-decoration: none;
  color: inherit;
}

.platform-item strong {
  color: var(--navy);
}

.platform-item span {
  color: var(--muted);
  font-size: 14px;
}

.split-list {
  display: grid;
  gap: 22px;
}

.split {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  align-items: start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.split-reverse {
  grid-template-columns: 1fr 180px;
}

.split-reverse .split-visual {
  order: 2;
}

.split-visual {
  background: #eef3fa;
  border-radius: var(--radius);
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.quote-card .who {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.stat {
  text-align: left;
}

.stat b {
  display: block;
  color: var(--gold);
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 8px;
}

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--navy);
  color: #fff;
  font-weight: 700;
}

tr:nth-child(even) td {
  background: #f8fafc;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.faq-item h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 18px;
}

.dl-panel {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 28px;
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 24px 0 8px;
}

.dl-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfe;
}

.dl-card h3 {
  margin: 0;
  color: var(--navy);
}

.steps {
  margin: 0;
  padding-left: 22px;
}

.steps li {
  margin: 0 0 16px;
  padding-left: 6px;
}

.steps li::marker {
  color: var(--gold);
  font-weight: 700;
}

.version-list {
  display: grid;
  gap: 16px;
}

.version-item time {
  display: inline-block;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 6px;
}

.prose {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 32px;
}

.prose h2 {
  margin-top: 36px;
}

.prose h2:first-child {
  margin-top: 0;
}

.cta-band {
  margin-top: 28px;
  padding: 22px;
  border-radius: var(--radius);
  background: #eef3fa;
  border: 1px solid var(--line);
}

.page-hero {
  padding: 48px 0 20px;
}

.page-hero h1 {
  margin: 0 0 16px;
  font-family: "Source Han Serif SC", "Songti SC", "SimSun", serif;
  color: var(--navy);
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.35;
}

.meta-line {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 18px;
}

.site-footer {
  background: var(--navy-deep);
  color: #d7e2f2;
  padding: 36px 0 28px;
  margin-top: 20px;
}

.site-footer a {
  color: #f3d48a;
}

.site-footer p {
  margin: 0 0 10px;
}

.safety {
  color: #fff;
  font-weight: 700;
}

@media (max-width: 980px) {
  .grid-3,
  .quote-grid,
  .stat-grid,
  .platform-grid,
  .dl-grid {
    grid-template-columns: 1fr 1fr;
  }

  .split,
  .split-reverse {
    grid-template-columns: 1fr;
  }

  .split-reverse .split-visual {
    order: 0;
  }
}

@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .grid-3,
  .quote-grid,
  .stat-grid,
  .platform-grid,
  .dl-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 40px 0;
  }
}