:root {
  --bg:         #f4f5f7;        
  --border:     #e8eaed;       
  --text-main:  #111318;       
  --text-sub:   #6b7280;          
  --accent:     #2563eb;      
  --accent-bg:  #eff6ff;      
  --radius-sm:  8px;
  --radius-lg:  24px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}


/* This is the navigation bar style setting; */
.navbar {
  position: sticky;            
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px); 
  border-bottom: 1px solid var(--border);
  padding: 0 48px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar img {
  width: 50px;
  height: auto;
}


.navbar-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1.4rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}


.navbar-links {
  display: flex;
  gap: 5px;
  list-style: none;           
}

.navbar-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-sub);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

/* This is color change when putting cursor in the navbar link */
.navbar-links a:hover {
  background: var(--accent-bg);
  color: var(--accent);
}


.navbar-links a.active {
  background: var(--accent-bg);
  color: var(--accent);
}


.navbar-search {
  margin-left: auto;
  position: relative;
}

.navbar-search input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 8px 16px 8px 38px; 
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-main);
  width: 220px;
  outline: none;
  transition: all var(--transition);
}

/* This is the Hero style setting; */
/* This is the Hero style setting; */
.hero {
	background: linear-gradient(30deg, #527ee6 2%, #0891b2 70%);
	padding: 80px 50px;
	text-align: center;
	position: relative;
	overflow: hidden;
}

.hero::before {
	content: '';
	position: absolute;
	width: 300px;
	height: 300px;
	border-radius: 70%;
	background: rgba(211, 211, 239, 0.36);
	top: -100px;
  	right: -100px;
	pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  bottom: -100px;
  left: 10%;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: white;
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.2rem, 5vw, 3.8rem); /* 响应式字号 */
  color: white;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 480px;
  margin: 0 auto 36px;
  font-weight: 300;
  line-height: 1.8;
}

.hero-tags {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;   
}

.hero-tag {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: white;
  padding: 7px 18px;
  border-radius: 20px;
  font-size: 0.84rem;
  cursor: pointer;
  transition: background var(--transition);
}

.hero-tag:hover {
  background: rgba(255, 255, 255, 0.28);
}


.hero-tag.active {
  background: white;
  color: var(--accent);
  font-weight: 600;
}



/* This is the Main style setting; */
/* This is the Main style setting; */

.main {
  max-width: 1500px;
  margin: 0 auto;
  padding: 37px 25px 30px;
}

.main_image {
    width: 37%;
    height: auto;
    display: block;
    margin: 0 auto;

}

.long_card {
	background: linear-gradient(35deg, #3661d6 0%, #0891b2 100%);
  border-radius: var(--radius-lg);
  padding: 37px 37px;
  display: grid; /* we have two div in html */
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 30px;
  overflow: auto;
  color: white;
}

.long_card h2{
  color: white;
}

.long_card_link{
  color: white;
  text-decoration: none;
}

/* This is the footer style setting; */
/* This is the footer style setting; */
.footer {
	background: lightblue;
	border-top: 3px solid 2px;
	padding: 20px 1px;
	display: flex;
	align-items: center;
  justify-content: space-between;
	color: var(--text-main);

}

.footer-left {
  display: flex;
  align-items: center;
  gap: 3px;
}
.footer img {
  width: 50px;
  height: auto;
}

.footer-logo {
  font-size: 1.1rem;
  color: var(--text-main);
  gap: 12px; 
}


.footer-end {
  color: var(--text-main);
  padding-right: 110px;
}