:root {
    --header-bgcolor: #ffffff;
    --nav-color: #43c3ff;
    --nav-active-bgcolor: #43c3ff;
    --nav-active-color: #fff;
    --banner-bgcolor: #4837a4;
    --footer-color: #43c3ff;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}
html,
body {
    scroll-behavior: smooth;
}
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
body {
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: Roboto, 'PingFang SC', 'Microsoft YaHei', '微软雅黑', system-ui, -apple-system, sans-serif;
}
a,
a:link,
a:visited,
a:hover,
a:active {
    outline: none;
    text-decoration: none;
}
a:hover {
    opacity: 0.8;
}
header {
    background-color: var(--header-bgcolor);
    height: 48px;
    padding: 0 12px 0 20px;
    box-shadow: 0 0 5px #000;
    position: relative;
    z-index: 99;
    position: sticky;
    top: 0;
}
header .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header .logo {
    display: block;
    height: 30px;
}
header nav {
    display: flex;
    gap: 10px;
    font-family: Inter;
}
header nav a {
    display: block;
    height: 30px;
    line-height: 30px;
    text-align: center;
    padding: 0 12px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 700;
    color: var(--nav-color);
}
header nav a.active {
    color: var(--nav-active-color);
    background-color: var(--nav-active-bgcolor);
}
.cover {
    position: sticky;
    top: 48px;
    z-index: 98;
}
.cover .content {
    height: 60px;
    background-color: var(--banner-bgcolor);
    padding: 0 8px;
    transition: all 0.3s ease;
}
.cover .content .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.cover .content .logo-slogan {
    transition: all 0.3s ease;
}
.cover .content .logo-slogan .logo {
    display: block;
    height: 20px;
}
.cover .content .logo-slogan .slogan {
    font-size: 12px;
    height: 20px;
    line-height: 20px;
    color: #fff;
}
.cover .content .contacts {
    font-size: 12px;
    line-height: 20px;
    color: #fff;
    transition: all 0.3s ease;
}
.cover .content .contacts div {
    display: flex;
    align-items: center;
    gap: 10px;
}
.cover .content .contacts .icon {
    display: block;
    width: 14px;
    height: 14px;
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
}
.cover .content .contacts .icon.icon_phone {
    background-image: url('../assets/icons/icon_phone.png');
}
.cover .content .contacts .icon.icon_email {
    background-image: url('../assets/icons/icon_email.png');
}
.cover .content .contacts a {
    color: #fff;
}
.cover .bottom {
    display: flex;
}
.cover .bottom div {
    flex: 1;
    aspect-ratio: 1 / 1;
    background-color: var(--banner-bgcolor);
    clip-path: circle(50% at 50% 0%);
}
.cover .bottom div:nth-child(13),
.cover .bottom div:nth-child(14),
.cover .bottom div:nth-child(15),
.cover .bottom div:nth-child(16) {
    display: none;
}
.cover.mini .content {
    height: 36px;
}
.cover.mini .logo-slogan {
    display: none;
}
.cover.mini .contacts {
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.cover.mini .bottom div {
    clip-path: ellipse(53% 40% at 50% 0%);
}
.part-title {
    font-family: Coiny;
    font-size: 24px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    text-transform: capitalize;
    margin-bottom: 20px;
    opacity: 0;
}
.part-content {
    font-size: 14px;
    line-height: 22px;
    font-weight: 700;
    padding: 0 30px 0 40px;
    opacity: 0;
}
.part-image {
    opacity: 0;
}
footer {
    line-height: 24px;
    padding: 30px 30px 50px 30px;
    font-family: Inter;
    font-size: 12px;
    font-weight: 700;
    color: var(--footer-color);
}
footer .container {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.book-btn {
    display: none;
    position: fixed;
    bottom: 50px;
    right: 15px;
    width: 145px;
    height: 40px;
    border-radius: 40px;
    background-color: #ff3e7b;
    border: 4px solid #fff;
    text-align: center;
    line-height: 32px;
    font-size: 18px;
    font-family: Inter;
    font-weight: 700;
    color: #fff;
    text-shadow: 1px 1px 0 #000;
    box-shadow: 1px 1px 2px 0 rgba(0, 0, 0, 0.3);
    z-index: 100;
}
@media (min-width: 768px) {
    .cover .content {
        height: 80px;
        padding: 0 20px;
    }
    .cover .content .logo-slogan .logo {
        height: 30px;
    }
    .cover .content .logo-slogan .slogan {
        font-size: 16px;
        height: 30px;
        line-height: 30px;
    }
    .cover .content .contacts {
        font-size: 16px;
        line-height: 30px;
    }
    .cover .bottom div:nth-child(13),
    .cover .bottom div:nth-child(14),
    .cover .bottom div:nth-child(15),
    .cover .bottom div:nth-child(16) {
        display: block;
    }
    .part-title {
        font-size: 32px;
    }
    .part-content {
        font-size: 18px;
        line-height: 24px;
    }
    footer {
        font-size: 16px;
        line-height: 24px;
    }
    .book-btn {
        font-size: 20px;
        line-height: 36px;
    }
}
@media (min-width: 1024px) {
    .part-content {
        font-size: 24px;
        line-height: 36px;
    }
}
@media (min-width: 1366px) {
    header {
        height: 68px;
    }
    header .logo {
        height: 40px;
    }
    header nav a {
        height: 40px;
        line-height: 40px;
        padding: 0 16px;
        font-size: 18px;
    }
    .cover {
        top: 68px;
    }
    .cover .content {
        height: 100px;
    }
    .cover .content .logo-slogan .logo {
        height: 40px;
    }
    .cover .content .logo-slogan .slogan {
        font-size: 18px;
        height: 40px;
        line-height: 40px;
    }
    .cover .content .contacts {
        font-size: 18px;
        line-height: 40px;
    }
    .cover.mini .content {
        height: 40px;
    }
}
@media (min-width: 1440px) {
    .part-title {
        font-size: 68px;
        height: 120px;
        line-height: 120px;
    }
    .cover .content .contacts {
        font-size: 24px;
    }
    .cover .content .contacts .icon {
        width: 24px;
        height: 24px;
    }
    header .container,
    .cover .content .container,
    footer .container {
        width: 1400px;
        margin: 0 auto;
    }
    footer {
        line-height: 40px;
        padding: 20px 0;
    }
    footer .container br {
        display: none;
    }
    footer .container {
        flex-direction: row;
        justify-content: space-between;
    }
}