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

body{
    font-family:"Microsoft JhengHei", Arial, sans-serif;
    background:#f5fbff;
    color:#0d4774;
}

/* 最上方橫幅 logo1.png */
.top-banner{
    width:100%;
    height:340px;
    background:url("../image/logo1.png") center center/cover no-repeat;
    position:relative;
}

.top-banner::after{
    content:"";
    position:absolute;
    left:0;
    bottom:0;
    width:100%;
    height:80px;
    background:linear-gradient(
        to bottom,
        rgba(255,255,255,0),
        rgba(245,251,255,.95)
    );
}

/* 導覽列 */
.navbar{
    position:sticky;
    top:0;
    z-index:99;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(10px);
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:16px 8%;
    box-shadow:0 5px 20px rgba(0,80,130,.12);
}

.nav-logo{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:24px;
    font-weight:bold;
    color:#0d4774;
}

.nav-logo img{
    width:42px;
    height:42px;
    border-radius:50%;
    object-fit:cover;
}

.nav-links{
    display:flex;
    gap:30px;
}

.nav-links a{
    text-decoration:none;
    color:#0d4774;
    font-weight:bold;
    padding:8px 6px;
    transition:.3s;
}

.nav-links a:hover,
.nav-links .active{
    color:#178fd3;
    border-bottom:3px solid #178fd3;
}

/* 中間主視覺 logo3.png */
.hero{
    width:88%;
    max-width:1200px;
    margin:42px auto;
    padding:70px;
    border-radius:34px;

    background-image:
        linear-gradient(rgba(255,255,255,.12), rgba(255,255,255,.35)),
        url("../image/logo3.png");
    background-size:cover;
    background-position:center;

    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:50px;

    box-shadow:0 25px 45px rgba(90,170,220,.25);
    position:relative;
    overflow:hidden;
}

.hero::before{
    content:"🧊";
    position:absolute;
    left:30px;
    bottom:25px;
    font-size:80px;
    opacity:.22;
}

.hero-text{
    flex:1;
    position:relative;
    z-index:2;
}

.sub-title{
    font-size:22px;
    font-weight:bold;
    margin-bottom:18px;
    color:#0d4774;
}

.hero h1{
    font-size:76px;
    letter-spacing:5px;
    margin-bottom:12px;
    color:#0d4774;
}

.hero h2{
    font-size:30px;
    color:#178fd3;
    margin-bottom:30px;
}

.slogan{
    font-size:24px;
    line-height:1.8;
    color:#333;
    margin-bottom:35px;
}

.hero-buttons{
    display:flex;
    gap:18px;
    flex-wrap:wrap;
}

.hero-buttons a{
    text-decoration:none;
    background:#178fd3;
    color:white;
    padding:15px 30px;
    border-radius:40px;
    font-weight:bold;
    box-shadow:0 8px 18px rgba(23,143,211,.25);
    transition:.3s;
}

.hero-buttons a:hover{
    transform:translateY(-6px);
    background:#0d74b4;
}

.hero-buttons .outline{
    background:white;
    color:#178fd3;
    border:2px solid #178fd3;
}

/* 右側主圖 */
.hero-card{
    flex:1;
    text-align:center;
    position:relative;
    z-index:2;
}

.hero-card img{
    width:100%;
    max-width:420px;
    border-radius:30px;
    box-shadow:0 20px 40px rgba(0,0,0,.15);
    border:10px solid white;
    transform:rotate(2deg);
}

/* 我們的堅持 */
.features{
    width:88%;
    max-width:1000px;
    margin:65px auto;
    text-align:center;
}

.features h2{
    font-size:34px;
    margin-bottom:35px;
    letter-spacing:4px;
    color:#0d4774;
}

.feature-box{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:26px;
}

.feature{
    background:white;
    padding:28px;
    border-radius:24px;
    border:2px dashed #9eddf8;
    box-shadow:0 12px 25px rgba(90,170,220,.16);
    transition:.3s;
}

.feature:hover{
    transform:translateY(-8px);
    box-shadow:0 18px 35px rgba(90,170,220,.25);
}

.icon{
    width:82px;
    height:82px;
    margin:0 auto 16px;
    border-radius:50%;
    background:#cceeff;
    display:flex;
    justify-content:center;
    align-items:center;
    font-size:38px;
}

.feature h3{
    font-size:24px;
    margin-bottom:10px;
    color:#0d4774;
}

.feature p{
    color:#496878;
    line-height:1.7;
}

/* 四個分頁卡片 */
.page-cards{
    width:88%;
    max-width:1150px;
    margin:70px auto 90px;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:26px;
}

.card{
    text-decoration:none;
    background:white;
    color:#0d4774;
    padding:22px;
    border-radius:24px;
    box-shadow:0 12px 28px rgba(0,80,130,.14);
    transition:.3s;
    text-align:center;
    overflow:hidden;
}

.card:hover{
    transform:translateY(-10px);
    box-shadow:0 20px 40px rgba(0,80,130,.22);
}

.card span{
    font-size:30px;
    font-weight:bold;
}

.card h3{
    font-size:28px;
    margin:8px 0 18px;
}

.card img{
    width:100%;
    height:160px;
    object-fit:cover;
    border-radius:16px;
    margin-bottom:18px;
}

.card p{
    color:#4b6574;
    line-height:1.7;
    min-height:75px;
}

.card button{
    border:none;
    width:42px;
    height:42px;
    border-radius:50%;
    color:white;
    font-size:20px;
    cursor:pointer;
    margin-top:12px;
}

.blue span,
.blue h3{ 
    color:#178fd3; 
}

.blue button{ 
    background:#178fd3; 
}

.yellow span,
.yellow h3{ 
    color:#e0a000; 
}

.yellow button{ 
    background:#e0a000; 
}

.green span,
.green h3{ 
    color:#4c9a42; 
}

.green button{ 
    background:#4c9a42; 
}

.purple span,
.purple h3{ 
    color:#7f55b5; 
}

.purple button{ 
    background:#7f55b5; 
}

/* 最下面冰塊背景 logo4.png */
footer{
    text-align:center;
    padding:90px 20px;
    background-image:
        linear-gradient(rgba(255,255,255,.2), rgba(255,255,255,.35)),
        url("../image/logo4.png");
    background-size:cover;
    background-position:center;
    color:#0d4774;
}

footer h2{
    font-size:36px;
    margin-bottom:10px;
    letter-spacing:3px;
}

footer p{
    font-size:18px;
}

/* 平板版 */
@media(max-width:900px){
    .top-banner{
        height:240px;
    }

    .navbar{
        flex-direction:column;
        gap:14px;
    }

    .nav-links{
        flex-wrap:wrap;
        justify-content:center;
        gap:14px;
    }

    .hero{
        flex-direction:column;
        padding:45px 28px;
        text-align:center;
    }

    .hero h1{
        font-size:52px;
    }

    .hero h2{
        font-size:26px;
    }

    .hero-buttons{
        justify-content:center;
    }

    .hero-card img{
        max-width:360px;
    }

    .feature-box,
    .page-cards{
        grid-template-columns:repeat(2,1fr);
    }
}

/* 手機版 */
@media(max-width:550px){
    .top-banner{
        height:150px;
    }

    .nav-logo{
        font-size:20px;
    }

    .nav-logo img{
        width:36px;
        height:36px;
    }

    .hero{
        width:92%;
        padding:36px 22px;
    }

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

    .hero h2{
        font-size:22px;
    }

    .slogan{
        font-size:20px;
    }

    .feature-box{
        grid-template-columns:1fr;
    }

    .page-cards{
        grid-template-columns:repeat(2, 1fr);
        gap:14px;
    }

    .card{
        padding:16px;
    }

    .card h3{
        font-size:22px;
    }

    .card img{
        height:120px;
    }

    .card p{
        font-size:14px;
        min-height:auto;
    }

    footer{
        padding:70px 20px;
    }
}