/* ============ 基础与变量 ============ */
:root{
    --wine-dark:  #a40000;   /* 深酒红 */
    --wine:       #7a1f3d;   /* 主色 */
    --wine-light: #9e2b50;   /* 浅酒红 */
    --gold:       #c18f31;   /* 金色点缀 */
    --gold-light: #f0dcb8;
    --text:       #3a2a30;
    --bg:         #faf5f6;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
    color:var(--text);
    background:var(--bg);
    overflow-x:hidden;
}
/*.container{width:92%;max-width:1180px;margin:0 auto;}*/


/* ============ Banner ============ */
.banner{
    height: 500px;
    background: linear-gradient(rgba(110, 0, 0, 0.78), rgba(110, 0, 0, 0.78)), url(/img/about.jpg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}
/* 装饰圆环 */
.banner::before,.banner::after{
    content:"";position:absolute;border-radius:50%;
    border:1px solid rgba(212,175,106,.25);
}
.banner::before{width:520px;height:520px;top:-160px;right:-120px;border-width:2px;}
.banner::after{width:380px;height:380px;bottom:-120px;left:-100px;}
.banner-inner{position:relative;z-index:2;padding:100px 20px 60px;}
.banner-tag{
    display:inline-block;color:var(--gold);
    border:1px solid var(--gold);border-radius:30px;
    padding:6px 22px;font-size:14px;letter-spacing:4px;margin-bottom:26px;
}
.banner h1{
    color:#fff;font-size:clamp(34px,6vw,64px);
    font-weight:900;letter-spacing:6px;line-height:1.3;
    text-shadow:0 4px 24px rgba(0,0,0,.35);
}
.banner h1 span{color:var(--gold);}
.banner-sub{
    color:rgba(255,255,255,.8);font-size:clamp(15px,2.2vw,19px);
    letter-spacing:3px;margin:22px auto 46px;max-width:640px;line-height:1.9;
}
/* Banner 数据条 */
/*.stat-item + .stat-item::before{*/
/*    content:"";position:absolute;left:0;top:15%;height:70%;width:1px;*/
/*    background:rgba(255,255,255,.18);*/
/*}*/
.stat-num i{font-style:normal;font-size:.55em;margin-left:2px;}
.scroll-down b{
    display:block;width:22px;height:36px;border:2px solid rgba(255,255,255,.5);
    border-radius:12px;margin:8px auto 0;position:relative;
}
.scroll-down b::after{
    content:"";position:absolute;left:50%;top:6px;width:4px;height:8px;
    background:var(--gold);border-radius:2px;transform:translateX(-50%);
    animation:scrollDot 1.6s infinite;
}
@keyframes scrollDot{
    0%{opacity:1;top:6px;} 100%{opacity:0;top:20px;}
}

/* ============ 通用标题 ============ */
.sec-head{text-align:center;margin-bottom:52px;}
.sec-head .en{
    color:var(--gold);font-size:13px;letter-spacing:5px;
    text-transform:uppercase;font-weight:600;
}
.sec-head h2{
    font-size:clamp(26px,4vw,38px);color:var(--wine-dark);
    font-weight:800;margin:12px 0 14px;letter-spacing:3px;
}
.sec-head .line{
    width:60px;height:3px;margin:0 auto;border-radius:3px;
    background:linear-gradient(90deg,var(--wine),var(--gold));
}

/* ============ 四大优势 ============ */
.advantages{padding:90px 0 80px;}
.adv-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:26px;
}
.adv-card-a{
    background:#fff;border-radius:18px;padding:44px 26px 38px;
    text-align:center;position:relative;overflow:hidden;
    box-shadow:0 6px 24px rgba(122,31,61,.08);
    transition:transform .4s ease, box-shadow .4s ease;
}
.adv-card-a:hover{transform:translateY(-12px);box-shadow:0 18px 40px rgba(122,31,61,.18);}
.adv-card-a:hover::before{transform:scaleX(1);}
.adv-num{
    position:absolute;top:14px;right:20px;font-size:52px;font-weight:900;
    color:rgba(122,31,61,.07);font-style:italic;
}
.adv-card-a:hover .adv-icon{transform:rotateY(180deg);}
.adv-card-a h3{font-size:19px;color:var(--wine-dark);margin-bottom:12px;letter-spacing:1px;}
.adv-card-a p{font-size:14px;color:var(--text);line-height:1.9;}

/* ============ 师资介绍 ============ */
.teachers{
    padding:90px 0 100px;
    background:
            linear-gradient(180deg, var(--bg) 0%, #f3e8eb 100%);
}
.teacher-row{
    display:flex;align-items:center;background:#fff;
    border-radius:20px;margin-bottom:34px;overflow:hidden;
    box-shadow:0 8px 30px rgba(122,31,61,.10);
    transition:transform .4s, box-shadow .4s;
    position:relative;
}
.teacher-row:hover{transform:translateY(-6px);box-shadow:0 20px 46px rgba(122,31,61,.20);}
/*.teacher-row:nth-child(even){flex-direction:row-reverse;}*/
/* 照片区 */
.t-photo{
    flex:0 0 220px;height:260px;position:relative;overflow:hidden;
}
.t-photo .avatar{
    width:220px;
    height:260px;
    background: lavender;
    object-fit: contain;
}
.t-badge{
    position:absolute;bottom:16px;left:16px;z-index:2;
    background:var(--gold);color:var(--wine-dark);
    font-size:10px;font-weight:700;padding:6px 16px;border-radius:20px;
    box-shadow:0 4px 12px rgba(0,0,0,.25);letter-spacing:1px;
}
/* 信息区 */
.t-info{flex:1;padding:38px 44px;position:relative;}
.t-name{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;}
.t-name h3{font-size:28px;color:var(--wine-dark);font-weight:800;}
.t-name .title{
    font-size:13px;color:var(--wine);border:1px solid var(--wine-light);
    border-radius:20px;padding:3px 14px;letter-spacing:1px;
}
.t-subject{color:var(--gold);font-size:15px;font-weight:600;margin:10px 0 16px;letter-spacing:2px;}
.t-desc{font-size:14.5px;var(--text);line-height:2;margin-bottom:20px;}
.t-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.t-tags span{
    background:rgba(122,31,61,.08);color:var(--wine);
    font-size:12.5px;padding:6px 14px;border-radius:6px;
    border-left:3px solid var(--wine-light);
}
.t-data{display:flex;gap:34px;border-top:1px dashed #e5d5da;padding-top:18px;flex-wrap:wrap;}
.t-data div b{color:var(--wine);font-size:22px;}
.t-data div b i{font-style:normal;font-size:13px;}
.t-data div p{font-size:12.5px;color:#a09096;margin-top:3px;}

/* ============ 重高老师 ============ */
.teacher-grid-z{
    display:grid;
    grid-template-columns: repeat(4, 1fr);
    gap:28px;
}
.teacher-card-z{
    background:#fff;
    border-radius:18px;
    padding:26px;
    box-shadow:0 6px 24px rgba(122,31,61,.07);
    position:relative;
    overflow:hidden;
    transition: box-shadow 0.5s ease, border-color 0.5s ease;
    border:1px solid transparent;
}

/* 头像悬浮发光放大 */
.teacher-card-z:hover .avatar-circle{
    transform: scale(1.06);
    box-shadow:0 8px 30px rgba(122,31,61,.35), 0 0 15px rgba(212,175,106,0.25);
}

.teacher-card-z:hover{
    box-shadow: 0 12px 45px rgba(122,31,61,.14), 0 0 40px rgba(212,175,106,0.12);
    border-color:rgba(122,31,61,0.18);
    /*box-shadow: 0 12px 40px rgba(122,31,61,.12), 0 0 30px rgba(212,175,106,0.08);*/
    /*border-color:rgba(122,31,61,0.15);*/
}
.teacher-card-z:hover::before{transform:scaleX(1);}

.teacher-head{
    display:flex;
    align-items:center;
    gap:18px;
    margin-bottom:16px;
}
/* 圆形头像 */
.avatar-circle{
    width:90px;
    height:90px;
    border-radius:50%;
    flex-shrink:0;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:34px;
    font-weight:900;
    color:#fff;
    font-family:Georgia,serif;
    box-shadow:0 8px 20px rgba(122,31,61,.2);
    overflow:hidden;
    border:2px solid rgba(255,255,255,0.4);
}
.c-bg{background:var(--main-dark);}

.tc-name{
    font-size:25px;
    color:var(--wine-dark);
    font-weight:900;
    letter-spacing:1px;
    margin-bottom:4px;
}
.tc-subject{
    color:var(--gold);
    font-size:15px;
    font-weight:600;
    letter-spacing:0.5px;
}
/* 简介单独一行 */
.tc-desc{
    font-size:14px;
    color:var(--text);
    line-height:1.7;
}

/* ============ 底部 CTA ============ */
.cta h2{color:#fff;font-size:clamp(24px,3.5vw,34px);letter-spacing:4px;margin-bottom:14px;}
.cta p{color:rgba(255,255,255,.7);margin-bottom:34px;letter-spacing:2px;}

/* 滚动进场动画 */
.fade-up{opacity:0;transform:translateY(46px);transition:opacity .8s ease, transform .8s ease;}
.fade-up.show{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (max-width: 992px){
    .adv-grid{grid-template-columns:repeat(2,1fr);}
    .t-photo{flex:0 0 250px;height:300px;}
    .t-info{padding:30px 28px;}
}
@media (max-width: 768px){
    .banner{min-height:20vh;height:300px;}

    /* 老师卡片上下堆叠 */
    .teacher-row,.teacher-row:nth-child(even){flex-direction:column;}
    .t-photo .avatar {width:100%;}
    .t-photo{flex:none;width:100%;height:240px;}
    .t-info{padding:0 28px 22px 28px;}
    .t-info::before{font-size:80px;top:0;right:14px;}
    .advantages {padding:90px 0 10px;}
    .teachers {padding: 90px 0 10px;}

    .teacher-grid-z{grid-template-columns: 1fr;}
    .teacher-card-z{padding:20px;}
    .avatar-circle{width:76px;height:76px;font-size:28px;}
    .tc-name{font-size:20px;}
}
@media (max-width: 520px){
    .adv-grid{grid-template-columns:1fr;}
    .adv-card-a{padding:34px 22px;}
    .t-name h3{font-size:23px;}
    .t-data{gap:20px;}
}

/* ============ 响应式适配 ============ */
@media (max-width: 1200px){
    .teacher-grid-z{grid-template-columns: repeat(1, 1fr);}
}