* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
line-height: 1.6;
color: #333;
background: #f5f5f5;
}

.header-wrap {
background: #1a1a1a;
color: #fff;
padding: 0.75rem 0;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-info {
max-width: 1200px;
margin: 0 auto;
padding: 0 20px;
display: flex;
justify-content: space-between;
align-items: center;
font-size: 0.875rem;
}

.header-info-left {
display: flex;
gap: 20px;
}

.header-info-right {
display: flex;
gap: 15px;
}

.header-info a {
color: #fff;
text-decoration: none;
transition: color 0.3s;
}

.header-info a:hover {
color: #00A8FF;
}

.header-content {
background: #fff;
padding: 1rem 0;
box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.container {
max-width: 1200px;
margin: 0 auto;
padding: 0 20px;
}

.logo {
text-align: center;
padding: 1rem 0;
}

.logo img {
max-height: 80px;
width: auto;
}

nav {
background: #2c3e50;
position: sticky;
top: 0;
z-index: 100;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-nav {
max-width: 1200px;
margin: 0 auto;
padding: 0;
list-style: none;
display: flex;
flex-wrap: wrap;
justify-content: center;
}

.main-nav > li {
position: relative;
}

.main-nav > li > a {
display: block;
padding: 1rem 1.25rem;
color: #fff;
text-decoration: none;
transition: background 0.3s;
}

.main-nav > li > a:hover,
.main-nav > li.current-menu-item > a {
background: #00A8FF;
}

.sub-menu {
display: none;
position: absolute;
top: 100%;
left: 0;
background: #34495e;
min-width: 200px;
list-style: none;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.main-nav li:hover > .sub-menu {
display: block;
}

.sub-menu a {
display: block;
padding: 0.75rem 1.25rem;
color: #fff;
text-decoration: none;
transition: background 0.3s;
border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sub-menu a:hover {
background: #00A8FF;
}

.sub-menu .sub-menu {
left: 100%;
top: 0;
}

.content-wrapper {
background: #fff;
max-width: 1200px;
margin: 2rem auto;
padding: 3rem 2rem;
box-shadow: 0 0 20px rgba(0,0,0,0.1);
border-radius: 8px;
}

h1 {
font-size: 2.5rem;
color: #2c3e50;
margin-bottom: 2rem;
padding-bottom: 1rem;
border-bottom: 3px solid #00A8FF;
}

article {
margin-bottom: 3rem;
}

article p {
margin-bottom: 1.25rem;
font-size: 1.05rem;
line-height: 1.8;
color: #444;
}

article h2 {
font-size: 2rem;
color: #2c3e50;
margin: 2rem 0 1rem;
}

article h3 {
font-size: 1.5rem;
color: #34495e;
margin: 1.5rem 0 1rem;
}

article h4 {
font-size: 1.25rem;
color: #34495e;
margin: 1.25rem 0 0.75rem;
}

.transition-section {
margin: 3rem 0;
padding: 2rem;
background: #f8f9fa;
border-left: 4px solid #00A8FF;
border-radius: 4px;
}

.transition-section p {
margin-bottom: 1rem;
font-size: 1.05rem;
line-height: 1.8;
color: #555;
}

.links-section {
margin-top: 3rem;
padding: 2.5rem;
background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.links-section h2 {
font-size: 2rem;
color: #2c3e50;
margin-bottom: 1.5rem;
text-align: center;
}

.links-section h3 {
font-size: 1.5rem;
color: #34495e;
margin: 2rem 0 1rem;
padding-bottom: 0.5rem;
border-bottom: 2px solid #00A8FF;
}

.links-section ul {
list-style: none;
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 0.75rem 2rem;
margin-bottom: 2rem;
}

.links-section li {
padding-left: 1.5rem;
position: relative;
}

.links-section li:before {
content: "▸";
position: absolute;
left: 0;
color: #00A8FF;
font-weight: bold;
}

.links-section a {
color: #2c3e50;
text-decoration: none;
transition: color 0.3s, padding-left 0.3s;
display: inline-block;
}

.links-section a:hover {
color: #00A8FF;
padding-left: 5px;
}

footer {
background: #1a1a1a;
color: #fff;
padding: 2rem 0;
margin-top: 3rem;
text-align: center;
}

footer p {
margin: 0.5rem 0;
}

@media (max-width: 968px) {
.main-nav {
flex-direction: column;
}

.main-nav > li {
width: 100%;
}

.sub-menu {
position: static;
display: none;
box-shadow: none;
}

.main-nav li:hover > .sub-menu {
display: block;
}

.sub-menu .sub-menu {
left: 0;
}

.links-section ul {
grid-template-columns: 1fr;
}

h1 {
font-size: 2rem;
}

.header-info {
flex-direction: column;
gap: 10px;
text-align: center;
}

.content-wrapper {
padding: 2rem 1.5rem;
margin: 1rem;
}
}

@media (max-width: 600px) {
h1 {
font-size: 1.75rem;
}

article h2 {
font-size: 1.5rem;
}

article h3 {
font-size: 1.25rem;
}

.transition-section {
padding: 1.5rem;
}

.links-section {
padding: 1.5rem;
}

.main-nav > li > a {
padding: 0.75rem 1rem;
}
}