* {
    margin: 0;
    padding: 0;
    box-sizing: border-box; /* 防止padding撑大盒子 */
}

@media (max-width: 900px) {
    .feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}
html, body {
    width: 100%;
    min-height: 100%;
    background-color: #ffffff;
    color: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

body {
    overflow-y: auto;
}

main {
    width: 100%;
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    background: rgba(4, 4, 7, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav-left {
    position: relative;
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    left: clamp(16px, 5vw, 70px);
}

.nav-right {
    flex: 0 0 auto;
    display: flex;
    align-items: center;   
}

.nav-center {
    /*flex: 1;*/
    /* max-width: 550px; */
    width: min(500px, calc(100vw - 320px));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(40px, 4vw, 80px);
    margin: 0 auto;
    padding: 0 10px;
    white-space: nowrap;
}

.nav-center a {
    color: #fff;
    text-decoration: none;
    font-size: clamp(22px, 1vw, 25px);
    line-height: 1;
    flex: 0 0 auto;

}

.brand-logo {
    height: 40px;
    width: auto;
    display: block;
}

.nav-icon {
    height: 50px;
    width: 70px;
    display: block;
}

.hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    overflow: hidden;
    border-top: 5px solid #fff;
}

body > .hero:first-of-type {
    border-top: none;
}

.hero .bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 100%;
    object-fit: cover;
}

.hero-content {
    position: absolute;
    left: 53%;
    top: 50%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    transform: translate(-170%, -20%);
    color: #fff;
    text-align: left;
}

.hero-content1 {
    position: absolute;
    left: 53%;
    top: 50%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    transform: translate(-170%, -20%);
    color: #fff;
    text-align: left;
}
.hero-content--second {
    
    left: auto;
    right: clamp(28px, 8vw, 110px);
    top: 50%;
    transform: translateY(-50%);
    gap: 18px;
    /* align-items: flex-end; */
    text-align: right;
    max-width: min(520px, 42vw);
    font-size: clamp(34px, 4vw, 64px);
}

.hero-content--second-title{
      
font-family: 'Orbitron', sans-serif; /* 保持科技感字体 */
font-weight: 900;

;
}
.hero-content h1{
    font-size: clamp(34px, 4vw, 64px);
    line-height: 1.12;
}


.hero-content--second span{
    font-size: clamp(34px, 4vw, 64px);
   font-weight: 600;
    color: #ffffff;
    
}

.hero-content--second p {
    font-size: clamp(18px, 1.2vw, 23px);
    line-height: 1.5;
    opacity: 0.92;
}
.hero-btn {
    position: relative; /* 【关键点1】开启相对定位，作为内部箭头的参照物 */
    display: flex;      /* 【关键点2】这里建议用 flex 布局，比 inline-flex 更好控制对齐 */
    align-items: center;
    justify-content: flex-start; /* 确保内容从左开始排列 */

    /* 宽度必须固定！如果不固定，放大图片后按钮会自动变宽。
       如果你的按钮左边对齐，可以直接写死宽度，或者用 max-width */
    width: 185px;
    height: 50px;
    padding-left: 22px;
    /* 右边padding要去掉，因为我们把箭头绝对定位了，不需要留空 */

    border: 2px solid rgba(255, 255, 255, 0.95);
    border-radius: 999px;
    color: #fff;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(6px);
    margin-top: 30px;
    box-sizing: border-box; /* 确保 padding 不会让盒子变大 */
}

/* 文字样式微调 */
.btn-text {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 0.04em;
    /* 增加一点右边距，拉开文字和箭头的距离，防止放大后重叠 */
    margin-right: 10px;
}

.arrow-icon {
    /* 【关键点3】绝对定位！脱离文档流，箭头就不会占用空间了 */
    position: absolute;
    right: 18px;   /* 距离右边框的距离 */
    top: 50%;
    transform: translateY(-50%); /* 垂直居中 */

    width: 62px;   /* 原来的值 */
    height: auto;  /* 高度自适应 */
    display: block;
}

.arrow-icon img {
    width: 100%;
    height: auto;
    margin-top: 5px;
    object-fit: contain; /* 确保图片完整显示，不被拉伸裁剪 */
    /* 核心放大代码：在这里调整大小 */
    transform: scale(1.8); /* 放大1.5倍，你可以改成 2 试试 */
    /*transform-origin: left center; !* 【进阶】让箭头从左边中心点放大，这样它向右延伸时更自然 *!*/
}
.app-section {
    position: relative;
    min-height: 100vh;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(40px, 6vw, 80px) clamp(20px, 6vw, 80px);
}

.app-section__bg {
    position: absolute;
    inset: 0;
    background: #000;
}

.app-layout {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1180px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(36px, 8vw, 120px);
    flex-wrap: wrap;
    margin-left: 100px;
}

.app-phone {
    flex: 0 1 280px;
    display: flex;
    justify-content: center;
}

.app-phone__img {
    width: min(100%, 260px);
    height: auto;
    display: block;
    border-radius: 28px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    overflow: hidden;
}

.app-copy {
    flex: 1 1 320px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: clamp(30px, 3vw, 50px);
}

.app-copy h1 {
    font-size: clamp(52px, 4.8vw, 75px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: 0.02em;
    text-align: left;
}

.app-actions {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
    flex-wrap: nowrap;
}

.app-actions__left {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 183px;
}

.app-download,
.app-docs {
    width: clamp(190px, 1.2vw, 220px);
    height: 45px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.app-download {
    display: flex;
    justify-content: flex-start;
    padding: 0 25px;
    gap: 14px;
    background: #fff;
    color: #111;
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.08);
}

.app-download img {
    width: 35px;
    height: 35px;
    display: block;
}

.app-download span {
    font-size: clamp(16px, 1.2vw, 20px);
    font-weight: 600;
    line-height: 1;
}

.app-docs {
    padding: 0 22px;
    background: linear-gradient(90deg, #35a3ff, #0f86f5);
    color: #fff;
    font-size: clamp(16px, 1.2vw, 20px);
    font-weight: 600;
    box-shadow: 0 10px 22px rgba(15, 134, 245, 0.2);
}

.feature-grid-section {
    position: relative;
    min-height: 100vh;
    width: 100%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(15px, 5vw, 64px);
    border-top: 7px solid #fff;
}

.feature-grid {
    width: 100%;
    max-width: 1680px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 80px 47px;
}

.feature-card {
    position: relative;
    height: min(280px, 22vw);
    border-radius: 10px;
    background: linear-gradient(180deg, #ffffff 0%, #f7f7f7 100%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.14);
    overflow: hidden;
    padding: 0;
}


.feature-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.feature-card--right .feature-text {
    position: absolute;
    top: 50%;
    left: 75%;
    transform: translate(-50%, -50%);
    width: 30%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    z-index: 2;
}

.feature-card--left .feature-text {
    position: absolute;
    top: 50%;
    left: 25%;
    transform: translate(-50%, -50%);
    width: 30%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    z-index: 2;
}

.feature-text {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
}

.feature-text p {
    color: #9d9d9d;
    font-size:clamp(17px, 1.2vw, 22px);
    line-height: 1;
}

.feature-text h2 {
    font-size: clamp(22px, 2vw, 32px);
    line-height: 1;
    color: #111;
    font-weight: 700;
}

.about-section {
    position: relative;
    min-height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 30px;
}

.about-section .bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-content  {
    position: relative;
    z-index: 1;
    width: min(1000px, 86vw);
    text-align: center;
    color: #fff;
    margin: 0 auto;
}

.about-content h1 {
    font-size: clamp(40px, 5vw, 72px);
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.08em;
    margin-top: 30px; 
}

.about-content p {
    font-size: 25px;
    line-height: 1.6;
    letter-spacing: 0.02em;
    margin:  10px 0px; 
    
 
}
.about-content-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 490px;
    margin-bottom: 20px;
}

.investment-section {
    width: 100%;
    min-height: 100vh;
    background-color: #fff;
    background-image: url('./img/sy6.png');
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(40px, 6vw, 80px) clamp(20px, 6vw, 80px);
    border-top: 7px solid #fff;
}

.investment-section h1 {
    font-size: clamp(40px, 4vw, 64px);
    line-height: 1;
    color: #111;
    font-weight: 700;
    margin-bottom: clamp(40px, 6vw, 70px);
}

.investment-logos {
    width: 100%;
    max-width: 1350px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(24px, 6vw, 90px);
    flex-wrap: nowrap;
}

.investment-logos img {
    width: calc((100% - 2 * clamp(24px, 6vw, 90px)) / 3);
    max-width: 320px;
    height: auto;
    object-fit: contain;
    display: block;
}

.contact-section {
    width: 100%;
    min-height: 220px;
  
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 28px;
    padding: 32px clamp(24px, 4vw, 70px);
    border-top: 1px solid #efefef;
    border-bottom: 1px solid #dddddd;

    margin-top: 150px;

}

.contact-section h2 {
    font-size: clamp(28px, 3vw, 42px);
    font-weight: 600;
    color: #111;
    padding-right: 28px;
    border-right: 1px solid #e5e5e5;
    white-space: nowrap;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
    color: #666;
    font-size: 18px;
    line-height: 1.4;
}

.social-icons {
    display: flex;
    align-items: center;
    gap: 14px;
    justify-self: end;
}

.social-icons a {
    width: 48px;
    height: 48px;
    border-radius: 30px;
    background: #565656;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    flex: 0 0 auto;
}

.social-icons img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    display: block;
}
.social-icon--wechat img{
    width:63px;
    height:63px;
}

.footer-section {
    width: 100%;
    min-height: 100vh;
    background: #f1f1f1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 36px clamp(24px, 4vw, 70px) 22px;
    padding-left: 100px;
    padding-bottom: 20px;
    border-top: 7px solid #fff;
}

.footer-links {
    margin-top: 125px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 48px;
    max-width: 760px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.footer-col h3 {
    font-size: 22px;
    color: #111;
    margin-bottom: 6px;
}

.footer-col a {
    color: #777;
    text-decoration: none;
    font-size: 20px;
    
    line-height: 1.4;
}
.footer-bottom {
    display: flex;
    align-items: flex-end; /* 保持底部对齐 */
    justify-content: space-between;
    gap: 20px;
    color: #b7b7b7;
    font-size: 20px;
    font-weight: 500;
    min-height: 80px; /* 【关键】给整个底部区域一个最小高度，防止太挤 */
    margin-bottom: 20px;
}

.footer-bottom p {
    display: flex;
    align-items: center; /* 让文字和国徽在文字行内垂直居中 */
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 5px; /* 去掉默认边距，防止偏移 */
}

/* 左边国徽：变小 */
.footer-brand-img {
    height: 27px !important; /* 调小 */
    width: auto;
    vertical-align: middle; /* 辅助对齐 */
}

/* 右边Logo：变大，且单独控制它的底部对齐 */
.footer-brand {
    height: 60px !important; /* 调大 */
    width: auto;
    display: block;
    /* 【关键】让这个图片自己贴底，不受文字行高影响 */
    align-self: flex-end;
    /* 微调：如果觉得太高，可以用 margin-top 往下压一点 */
    /* margin-top: 10px;*/
}
.footer-bottom a {
    text-decoration: none;
    color: #b7b7b7;
    /*transition: color 0.2s ease; !* 可选：添加颜色过渡效果 *!*/
}

.footer-bottom a:hover {
    text-decoration: none; /* 确保悬停时也没有下划线 */

}