* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

:root {
    --primary-blue: #1d2088;
    --china-red: #c62b29;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    --light: #f7f7f7;
    --dark: #212529;
    --gray: #6c757d;
    --pink: #e94e77;
}


body {
    margin: 0;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #f7f7f7;
    color: #222;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

p.list {
    padding-left: 2.5em;
    text-indent: 0;
}

.container {
    /*width: 80%;*/
    max-width: 1400px;
    /*margin: 0 100px 0;*/
}

/* 顶部导航栏 - 添加渐变效果 */
.site-header {
    width: 100%;
    background: var(--primary-blue);
    color: #fff;
    position: fixed;
    z-index: 1000;
    transition: background-color 0.5s ease;
    top: 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* height: 123px; */
    height: 90px;
    transition: height 0.3s ease;
    /*max-width: 1200px;*/
    /*margin: 0 100px 0;*/
    text-align: center;
    /*justify-content: center;*/
    margin: 0 auto;
    padding: 0 100px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    margin-right: 15px;
    height: 60px;
    transition: height 0.3s ease;
}

.main-nav ul {
    display: flex;
    gap: 60px;
}

.main-nav a {
    /* color: #4c9fda; */
    color: #ffffff;
    font-size: 19px;
    padding: 8px 0;
    transition: all 0.3s ease;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

.main-nav a:hover::after {
    width: 100%;
}





.main-nav li.active a {
    color: #ffffff;
    font-size: 18px;
    padding: 8px 0;
    position: relative;
    transition: all 0.3s ease;
}

.main-nav li.active a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

.main-nav a {
    color: #eee;
}

.main-nav a:hover {
    color: #fff;
}

.content-section {
    background: #f7f7f7;
    padding: 60px 0 40px 0;
    max-width: 1400px;
    margin: 0 auto;
}

.content-container {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    max-width: 1400px;
    margin: 100px 100px 80px;
    gap: 48px;
    flex-wrap: wrap;
}

.content-text {
    /* flex: 1 1 400px; */
    font-size: 18px;
    color: #333;
    line-height: 2;
    text-align: left;
    text-indent: 2em;
}

.content-text h2 {
    text-align: center;
    font-size: 40px;
    color: #333;
    margin: 50px auto 30px;
    font-weight: 600;
}

.content-text h2.left {
    text-align: left;
    font-size: 40px;
    color: #333;
    margin: 50px auto 30px;
    font-weight: 600;
}

.content-text h3 {
    text-align: left;
    font-size: 22px;
    color: #333;
    margin: 10px auto;
    font-weight: 500;
    text-indent: 0;
}

.content-text table {
    width: 90%;
    border-collapse: collapse;
    border: #666666 1px solid;
    margin: 20px 0 20px 2em;
}

.content-text table th {
    padding: 10px;
    background-color: #f2f2f2;
    color: #333;
    border: 1px solid #666666;
    text-align: center;
    font-weight: bold;
}

.content-text table th:nth-child(1) {
    width: 10%;
}

.content-text table th:nth-child(2) {
    width: 55%;
}

.content-text table td {
    padding: 10px;
    border: 1px solid #666666;
}

.content-cards {
    /* width: 80%; */
    display: flex;
    justify-content: center;
    gap: 30px;
    /* margin-bottom: 40px; */
    margin: 0 auto 40px;
    /* flex-wrap: wrap; */
    /* Allow cards to wrap on smaller screens */
}

.middle-cards {
    /* width: 80%; */
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 0 auto 40px;
}

.mcard {
    /* width: 300px; Adjust card width as needed */
    /* background: #fff; */
    border-radius: 34px;
    overflow: hidden;
    /* box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); */
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mcard img {
    gap: 30px;
    margin-bottom: 30px;
}


.card {
    /* width: 300px; Adjust card width as needed */
    background: #fff;
    border-radius: 34px;
    overflow: hidden;
    /* box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); */
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    /* box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12); */
}

.card img {
    /* width: 100%; */
    /* height: 200px; Fixed height for card images */
    object-fit: cover;
    display: block;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 1.4rem;
    color: #2b303a;
    margin: 0 0 10px 0;
    font-weight: bold;
}

.card-content p {
    font-size: 1rem;
    color: #666;
    margin: 0;
    line-height: 1.5;
}



.content-highlight {
    color: var(--primary-blue);
    font-weight: bold;
    margin-top: 18px;
    font-size: 20px;
}

.content-image {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.content-image img {
    width: 100%;
    border-radius: 32px;
    box-shadow: 0 8px 32px rgba(29, 32, 136, 0.08);
}

/* 响应式 */
@media (max-width: 900px) {
    .content-container {
        flex-direction: column;
        gap: 32px;
    }
}

@media (max-width: 600px) {
    .content-section {
        padding: 32px 0 24px 0;
    }

    .content-text {
        font-size: 15px;
    }

    .content-image img {
        max-width: 95vw;
    }
}



/* 首页样式开始 */
/* 顶部大图 */
.hero-section {
    position: relative;
    width: 100%;
    height: 683px;
    overflow: hidden;
    background: #222;
    /* padding-top: 123px; */
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.85);
}

.hero-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-text h1 {
    font-size: 2.5rem;
    margin: 0 0 10px 0;
    letter-spacing: 2px;
}

.hero-text p {
    font-size: 1.1rem;
    margin: 0;
}

/* 视频与介绍 */
.intro-section {
    background: #fff;
    padding: 48px 0 24px 0;
    text-align: center;
}

.video-placeholder {
    /* width: 1400px; */
    height: 590px;
    margin: 0 auto 32px auto;
    background: #f2f2f2;
    border-radius: 12px;
    padding: 0;
    position: relative;
}

.video-placeholder h2 {
    padding-top: 200px;
    font-size: 60px;
    font-weight: bold;
    margin-bottom: 16px;
}

.hr {
    /* width: 1400px; */
    height: 1px;
    background: #e0e0e0;
    margin: 0 auto;
}

.play-button {
    width: 64px;
    height: 64px;
    background: #fff;
    border-radius: 50%;
    margin: 0 auto;
    border: 3px solid #232c85;
    position: relative;
    cursor: pointer;
}

.play-button::after {
    content: '';
    position: absolute;
    left: 24px;
    top: 18px;
    width: 0;
    height: 0;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    border-left: 22px solid #232c85;
}

.intro-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 90px;
    margin: 80px 0 80px 0;
    /* max-width: 1200px; */
}

.intro-logo img {
    min-width: 195px !important;
    margin-bottom: 8px;
}

.intro-logo p {
    font-weight: bold;
    color: #232c85;
    font-size: 1.1rem;
}

.intro-text {
    max-width: 910px;
    text-align: left;
    color: #444;
    font-size: 1.1rem;
    line-height: 2.2;
}

.intro-icons ul {
    display: flex;
    justify-content: center;
    gap: 100px;
    margin: 80px auto;
}

.intro-icons li {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 1rem;
    color: #e94e77;
}

.intro-icons li span {
    text-align: center;
    text-indent: 0;
}

.intro-icons img {
    width: 100%;
    margin-bottom: 20px;
}

/* 抗衰探索 */
.explore-section {
    background: #f7f7f7;
    padding: 48px 0 100px 0;
}

.explore-section h2 {
    text-align: center;
    font-size: 3.5rem;
    margin-bottom: 80px;
    color: #333333;
}

.explore-list {
    display: flex;
    flex-direction: column;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.explore-list-row {
    display: flex;
    /* flex-wrap: wrap; */
    gap: 30px;
    justify-content: center;
}

.explore-item {
    display: flex;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    align-items: center;
}


.explore-item>div {
    padding: 24px 80px;
    flex: 1;
}

.explore-item h3 {
    margin: 0 0 10px 0;
    font-size: 1.8rem;
    color: #333333;
    text-align: left;
}

.explore-item h3 span {
    font-size: 1rem;
    color: #888;
    font-weight: normal;
}

.explore-item ul {
    display: flex;
    gap: 75px;
    color: #e94e77;
    font-size: 1rem;
    margin: 40px auto;
}

.explore-item li {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 1rem;
    color: #e94e77;
}

.explore-item li span {
    margin-top: 20px;
}

/* 专家团队 */
.team-section {
    background: #fff;
    padding: 48px 0 0 0;
    text-align: center;
    max-width: 1200px;
}

.team-section h2 {
    font-size: 3.5rem;
    color: #333333;
    margin-bottom: 32px;
}

.team-image {
    width: 1200px;
    height: 780px;
    margin: 60px auto 0;
    background: url('../images/team_bg.jpg') no-repeat center center;
    position: relative;
}

.team-logos {
    display: flex;
    justify-content: center;
    gap: 35px;
    padding-top: 160px;
}

/* 长寿中国推广项目 */
.longevity-section {
    /*width: 1400px;*/
    /*background: #f7f7f7;*/
    /*padding: 48px 0 24px 0;*/
    text-align: center;
    margin: 0 auto;
    max-width: 1200px;
}

.longevity-section h2 {
    font-size: 3.5rem;
    color: #232c85;
    margin-bottom: 80px;
}

.longevity-list {
    display: flex;
    justify-content: center;
    gap: 33px;
    flex-wrap: wrap;
}

.longevity-item {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    /* width: 683px; */
    margin-bottom: 24px;
}

.longevity-item img {
    object-fit: cover;
    margin-bottom: 12px;
}

.longevity-item p {
    display: flex;
    color: #ffffff;
    font-weight: bold;
    font-size: 2.5rem;
    margin: 0 auto 20px;
    justify-content: center;
    padding-top: 80px;
}

.hero-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 12px;
    width: 580px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* background: linear-gradient(135deg, #1a1a2e, #16213e); */
    z-index: -2;
}

.hero-image2 {
    position: absolute;
    top: 0;
    left: 0;
    /* width: 100%;
    height: 100%; */
    object-fit: cover;
    /* opacity: 0.7; */
    z-index: -1;

}

.overlay {
    position: absolute;
    /* top: 0;
    left: 0;
    width: 100%;
    height: 100%; */
    /* background: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%); */
    z-index: 0;
}

.content {
    /* position: relative; */
    text-align: center;
    z-index: 1;
}

.btn-container {
    /* display: flex; */
    justify-content: center;
    text-align: center;
    gap: 20px;
    margin: 0 30px;
    width: 580px;
    height: 580px;
}

.btn {
    padding: 6px 18px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-primary {
    background: #e94560;
    color: white;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
    background: #ff5c77;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.6);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-3px);
}

/* 媒体报道 */
.media-section {
    width: 100%;
    min-height: 736px;
    position: relative;
    overflow: hidden;
    padding: 0;
    margin: 0;
    text-align: center;
}

.media-section h2 {
    font-size: 3.5rem;
    color: #232c85;
    margin-bottom: 80px;
}

.media-bg {
    width: 100%;
    min-height: 736px;
    background: url('../images/mtbd_bg.jpg') no-repeat center center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.media-list {
    max-width: 1200px;
    margin-right: 50vw;
    margin-left: 30px;
    color: #fff;
    font-size: 1.6rem;
    line-height: 1.8;
    text-align: left;
    z-index: 2;
}

.media-list ol {
    margin: 0;
    padding-left: 32px;
}

.media-list li {
    margin-bottom: 18px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* 首页内容样式结束 */



/* 下拉菜单样式 */
.main-nav .dropdown {
    position: relative;
}

.main-nav .dropdown-menu {
    display: none;
    position: absolute;
    left: 0;
    top: 100%;
    background: #fff;
    min-width: 170px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    /*border-radius: 8px;*/
    z-index: 100;
    padding: 8px 0;
    text-align: left;
}

.main-nav .dropdown-menu li {
    list-style: none;
}

.main-nav .dropdown-menu a {
    display: block;
    padding: 10px 10px;
    color: #2b303a;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s;
}

.main-nav .dropdown-menu a:hover {
    background: #f2f2f2;
    color: var(--primary-blue);
}

.main-nav .dropdown:hover .dropdown-menu {
    display: block;
}


.footer-nav {
    background: #2b303a;
    color: #999;
    padding: 60px 0 40px 0;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.footer-nav-container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 80px;
}

.footer-logo-block {
    width: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* margin-right: 40px; */
}

.footer-logo-row {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 30px;
    width: 130px;
}

.footer-logo-img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.footer-logo-title {
    font-size: 2rem;
    font-weight: bold;
    line-height: 1.2;
    text-align: left;
}

.footer-logo-title div:last-child {
    font-size: 1.3rem;
    letter-spacing: 0.3em;
    margin-top: 4px;
}

.footer-qrcode {
    margin: 0 auto 10px auto;
}

.footer-qrcode-placeholder {
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: 10px;
}

.footer-wechat-tip {
    /* margin: 18px 0 10px 0; */
    font-size: 1rem;
}

.footer-copyright {
    margin-top: 20px;
    font-size: 12px;
}

.footer-links {
    display: flex;
    gap: 10px;
    flex: 1;
    justify-content: flex-start;
    margin-top: 10px;
    /* margin-left: 50px; */
}

.footer-col {
    min-width: 150px;
}

.footer-col-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 22px;
    letter-spacing: 1px;
}

.footer-col-link {
    font-size: 1rem;
    margin-bottom: 15px;
    color: #999;
    opacity: 0.92;
    transition: color 0.2s;
    cursor: pointer;
}

.footer-col-link:hover {
    color: #fff;
}

@media (max-width: 1200px) {
    .footer-nav-container {
        flex-direction: column;
        align-items: center;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
        justify-content: center;
        width: 100%;
    }

    .footer-logo-block {
        margin-right: 0;
        margin-bottom: 30px;
    }
}

@media (max-width: 700px) {
    .footer-nav {
        padding: 30px 0 20px 0;
    }

    .footer-nav-container {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .footer-links {
        flex-direction: column;
        gap: 18px;
        align-items: center;
    }

    .footer-col {
        min-width: 0;
        width: 100%;
        text-align: center;
    }

    .footer-logo-block {
        width: 100%;
    }

    .footer-qrcode-placeholder {
        width: 120px;
        height: 120px;
    }
}