/* RESET */
*{
margin:0;
padding:0;
box-sizing:border-box;
font-family: Arial, Helvetica, sans-serif;
}

/* NAVBAR */
.navbar{
display:flex;
justify-content:space-between;
align-items:center;
padding:20px 8%;
background:white;
border-bottom:1px solid #eee;
}

.logo{
font-size:22px;
font-weight:bold;
color:#0a2540;
}

.nav-links{
display:flex;
gap:30px;
list-style:none;
}

.nav-links a{
text-decoration:none;
color:#333;
font-size:15px;
}

.nav-btn{
background:#0a2540;
color:white !important;
padding:8px 16px;
border-radius:4px;
}

/* HERO */
.hero{
height:80vh;
display:flex;
align-items:center;
justify-content:center;
background:linear-gradient(to right, #0a2540, #1b4b7a);
color:white;
text-align:center;
padding:0 20px;
}

.hero h1{
font-size:42px;
margin-bottom:20px;
}

.hero p{
font-size:18px;
max-width:600px;
margin:auto;
}

.hero-buttons{
margin-top:30px;
}

/* BUTTONS */
.btn{
padding:12px 24px;
text-decoration:none;
border-radius:4px;
margin:5px;
display:inline-block;
}

.primary{
background:#ff6a00;
color:white;
}

.secondary{
border:1px solid white;
color:white;
}

/* SECTIONS */
.section{
padding:80px 10%;
text-align:center;
}

.light{
background:#f5f7fa;
}

h2{
margin-bottom:40px;
font-size:28px;
color:#0a2540;
}

/* GRID */
.grid{
display:flex;
gap:40px;
}

.grid-4{
display:grid;
grid-template-columns:repeat(4,1fr);
gap:30px;
margin-top:40px;
}

/* CARD */
.card{
background:white;
padding:30px;
box-shadow:0 5px 15px rgba(0,0,0,0.05);
}

/* TEXT */
.center-text{
max-width:700px;
margin:auto;
}

/* CTA */
.cta{
background:#0a2540;
color:white;
padding:80px;
text-align:center;
}

/* FOOTER */
footer{
background:#111;
color:#ccc;
text-align:center;
padding:40px;
}

/* MOBILE */
@media(max-width:768px){

.grid{
flex-direction:column;
}

.grid-4{
grid-template-columns:1fr;
}

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

/* WhatsApp 浮窗 */
.whatsapp-float{
position:fixed;
bottom:20px;
right:20px;
background:#25D366;
color:white;
padding:12px 18px;
border-radius:50px;
text-decoration:none;
font-weight:bold;
box-shadow:0 5px 10px rgba(0,0,0,0.2);
}

/* 表单优化 */
input, textarea{
width:100%;
padding:12px;
border:1px solid #ccc;
border-radius:4px;
}

button{
border:none;
cursor:pointer;
}
}