/* --- 1. Reset & Base --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #1D1D1F;
    color: #fff;
    min-width: 320px;
    font-size: 17px;
    line-height: 1.5;
}
a { text-decoration: none; color: inherit; cursor: pointer; }
ul, li { list-style: none; }
img { max-width: 100%; display: block; }
.clearfix:after { content: ''; display: block; clear: both; }

/* --- 2. Layout Utilities & Grid System --- */
.u-flex { display: flex; align-items: center; }
.u-flex-wrap { flex-wrap: wrap; }
.u-flex-center { justify-content: center; }
.u-flex-between { justify-content: space-between; }
.u-flex-1 { flex: 1; }
.u-flex-column { flex-direction: column; }
.u-flex-xy-center { justify-content: center; align-items: center; }
.u-flex-items-start { align-items: flex-start; }
.u-flex-end { justify-content: flex-end; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; position: relative; z-index: 10; }
.ant-row { display: flex; flex-wrap: wrap; margin-right: -10px; margin-left: -10px; }
.ant-col { padding: 10px; position: relative; }

/* 响应式列宽 */
.col-12 { width: 100%; }
@media (min-width: 576px) { .col-sm-6 { width: 50%; } .col-sm-12 { width: 100%; } }
@media (min-width: 768px) { .col-md-4 { width: 33.33%; } .col-md-6 { width: 50%; } .col-md-12 { width: 100%; } }
@media (min-width: 992px) { .col-lg-3 { width: 25%; } .col-lg-4 { width: 33.33%; } .col-lg-5 { width: 41.66%; } .col-lg-6 { width: 50%; } }
@media (min-width: 1200px) { .col-xl-2 { width: 16.66%; } .col-xl-3 { width: 25%; } .col-xl-5 { width: 41.66%; } .col-xl-6 { width: 50%; } }

/* 间距工具类 */
.u-p-t-10 { padding-top: 10px; }
.u-p-t-12 { padding-top: 12px; }
.u-p-t-50 { padding-top: 50px; }
.u-m-t-10 { margin-top: 10px; }
.u-m-l-4 { margin-left: 4px; }
.u-m-l-6 { margin-left: 6px; }
.u-f-s-14 { font-size: 14px; }
.colorWhite { color: #fff; }

/* --- 3. Global Components: Header (居中布局优化) --- */
.f-header {
    width: 100%; height: 70px; position: fixed; left: 0; top: 0; z-index: 300;
    transition: all .5s; background-color: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1); 
}
.f-header.blackBg { background-color: #000; }
.f-header .row { height: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; display: flex; align-items: center; justify-content: space-between; }
.f-header .info { display: flex; align-items: center; height: 100%; flex: 1; }
.f-header .logo { height: 45px; width: auto; }
.f-header .webName { font-size: 22px; color: #fff; font-weight: bold; margin-left: 12px; }

/* 导航居中核心样式 */
.f-header .nav { 
    display: flex; 
    margin: 0 auto; /* 关键：自动外边距实现居中 */
    height: 100%; 
}
.f-header .nav .cell {
    color: #fff; font-size: 15px; padding: 0 25px; height: 100%; line-height: 70px;
    cursor: pointer; position: relative; transition: all .3s;
}
.f-header .nav .cell.cur { color: #2C65FD; }
.f-header .nav .cell::after {
    content: ''; width: 0; height: 2px; background-color: #2C65FD;
    position: absolute; left: 50%; bottom: 0; transition: all .3s; margin-left: -50%;
}
.f-header .nav .cell.cur::after, .f-header .nav .cell:hover::after { width: 60%; }

.f-header .login {
    width: 88px; height: 32px; border-radius: 20px;
    background: linear-gradient(90deg, #04CC75 0%, #0069FC 100%);
    border: 1px solid rgba(255,255,255,0.2); font-size: 13px; color: #fff;
    display: flex; align-items: center; justify-content: center;
    transition: all .3s;
}
.f-header .login:hover { transform: scale(1.05); box-shadow: 0 0 10px rgba(44, 101, 253, 0.5); }

/* Mobile Nav */
.animenu { display: none; }
@media (max-width: 1100px) {
    .f-header { display: none; }
    .animenu {
        display: flex; width: 100%; height: 60px; background: #000;
        position: fixed; left: 0; top: 0; z-index: 999; align-items: center; justify-content: space-between; padding: 0 15px;
    }
    .animenu__toggle { display: block; background: transparent; border: none; cursor: pointer; }
    .animenu__toggle__bar { display: block; width: 20px; height: 2px; background: #fff; margin: 4px 0; }
    .animenu__nav {
        display: none; position: absolute; right: 0; top: 60px; width: 100%; background: #fff;
    }
    .animenu__nav.active { display: block; }
    .animenu__nav li a { display: block; padding: 15px; color: #333; border-bottom: 1px solid #eee; }
}

/* --- 4. Footer (极致压缩间距) --- */
.f-footer { 
    width: 100%; 
    background: #1B1B1C; 
    padding-top: 15px; 
    padding-bottom: 15px; 
}
.f-footer .name { font-size: 14px; color: #A6B4C2; font-weight: bold; margin-bottom: 5px; }
.f-footer .text { font-size: 13px; color: #AEBACB; display: block; margin-top: 4px; line-height: 1.4; }
.f-footer .bottom { border-top: 1px solid #35373B; padding-top: 10px; text-align: center; margin-top: 15px; }

/* --- 5. Global Section Titles (统一加大、加粗) --- */
.item1 .title, .item3 .title, .item5 .title, .item7 .title {
    font-size: 40px;
    font-weight: bold;
    margin-bottom: 50px;
    text-align: center;
}

/* --- 6. Page Specific: Banner --- */
.banner { width: 100%; margin-top: 70px; } /* 配合Header高度调整 */
.banner .swiper-container { width: 100%; height: 811px; }
.banner .swiper-slide img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 768px) { .banner .swiper-container { height: 250px; } }

/* --- 7. Page Specific: Item 1 (核心服务) --- */
.bgBlack { background: #141416; position: relative; }
.item1 { padding: 80px 0; }
.item1 .cell { 
    background: rgba(255,255,255,0.05); 
    padding: 40px 20px; 
    border-radius: 15px; 
    height: 100%; 
    transition: all .3s; 
}
.item1 .cell:hover { background: rgba(255,255,255,0.1); transform: translateY(-5px); }
.item1 .cell .icon { width: 60px; height: 60px; margin: 0 auto 20px; }
.item1 .cell .name { font-size: 20px; margin-bottom: 15px; color: #fff; font-weight: bold; }
.item1 .cell .intro { font-size: 14px; color: #AEBACB; line-height: 1.6; }

/* --- 8. Page Specific: Item 3 (真人分身) --- */
.item3 { padding: 80px 0; background: #1D1D1F; }
.item3 .pic { border-radius: 15px; width: 100%; }
.item3 .name { font-size: 28px; margin-bottom: 20px; font-weight: bold; }
.item3 ul { margin: 20px 0; }
.item3 ul li { margin-bottom: 15px; font-size: 15px; color: #AEBACB; }
.item3 ul li .icon { width: 20px; height: 20px; margin-right: 10px; }
.item3 .btn { 
    display: inline-block; margin-top: 20px; padding: 12px 30px; 
    background: linear-gradient(90deg, #04CC75 0%, #0069FC 100%); 
    border-radius: 25px; color: #fff; font-size: 16px; transition: all .3s; 
}
.item3 .btn:hover { transform: scale(1.05); }

/* --- 9. Page Specific: Item 5 (量身打造 - 图文叠加布局) --- */
.item5 { padding: 80px 0; }
.item5 .ant-col { display: flex; justify-content: center; }
.item5 .cell {
    position: relative;
    width: 323px;  /* 固定宽度 */
    height: 433px; /* 固定高度 */
    max-width: 100%;
    border-radius: 15px;
    overflow: hidden;
    transition: all .3s;
}
.item5 .cell:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.3); }
.item5 .cell .pic {
    width: 100%; height: 100%; object-fit: cover; display: block;
}
.item5 .cell .info {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 30px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 60%, transparent 100%);
    z-index: 2;
}
.item5 .cell .name {
    font-size: 22px; font-weight: bold; color: #fff; margin-bottom: 10px;
    display: flex; align-items: center;
}
.item5 .cell .name .icon { width: 24px; height: 24px; margin-left: 10px; }
.item5 .cell .intro { font-size: 14px; color: rgba(255,255,255,0.9); line-height: 1.6; }

/* --- 10. Page Specific: Item 7 (多领域应用 - 提亮背景 + 卡片色块) --- */
.item7 { position: relative; padding: 0px 0 20px 0; } /* 底部padding减小 */
.item7 .bg { 
    background: url('../images/bg_item7.jpg') no-repeat center center; 
    background-size: cover;
    padding: 60px 0; 
    border-radius: 20px; 
    position: relative;
}
.item7 .container.info { position: relative; z-index: 2; }
.item7 .title { 
    font-size: 40px; font-weight: bold; margin-bottom: 40px; color: #fff; 
    text-shadow: 0 2px 4px rgba(0,0,0,0.3); 
}
.item7 ul li { 
    margin-bottom: 30px; 
    padding: 25px;
    border-radius: 12px;
    /* 新增：半透明渐变背景块 */
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.02) 100%);
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(5px);
    transition: all .3s;
}
.item7 ul li:hover {
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
    transform: translateX(10px);
}
.item7 ul li .icon { width: 40px; height: 40px; margin-right: 15px; }
.item7 ul li .name { 
    font-size: 22px; margin: 0; color: #fff; font-weight: bold; 
    text-shadow: 0 2px 4px rgba(0,0,0,0.3); 
}
.item7 ul li .intro { 
    font-size: 15px; color: rgba(255,255,255,0.9); margin-top: 10px; line-height: 1.6; 
    text-shadow: 0 1px 2px rgba(0,0,0,0.3); 
}

/* --- 11. Common Animations --- */
.hoverToUp { transition: all .3s; }
.hoverToUp:hover { transform: translateY(-5px); }