/* 学在外官网 - 全局样式
   配色：深绿主色（教育/稳重/可信）+ 金色强调 + 米白背景
   全站禁用 Emoji 图标，统一使用内联 SVG */

:root{
  /* 紫色主色系（高级版：低饱和深紫 + 哑光香槟金） */
  --brand:#4C3673;        /* 深紫罗兰，主色 */
  --brand-2:#6E57A0;      /* 中紫，渐变过渡 */
  --brand-dark:#2E1F4A;   /* 墨紫，首屏底与页脚 */
  --accent:#BFA46A;       /* 哑光香槟金 */
  --accent-soft:#F2EDF7;  /* 极浅紫底 */
  --bg:#FAF9FB;           /* 近白微暖 */
  --ink:#1F1B2A;
  --muted:#6B6480;
  --white:#FFFFFF;
  --border:#E8E4EF;
  --radius:4px;           /* 小圆角更克制、更高级 */
  --shadow:0 2px 14px rgba(46,31,74,.07);
  --shadow-hover:0 12px 30px rgba(46,31,74,.14);
  --maxw:1200px;
  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif CJK SC",Georgia,serif;
}

/* 标题用衬线字体，拉开与正文的层次，提升质感 */
.hero h1,.sec-title,.brand-name,.stat-num,.card h3,.strength-item h4,.cta-bar h2,.footer h5{
  font-family:var(--serif);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
svg{display:inline-block;vertical-align:middle;flex:none}

/* ============ 顶部第一行：信息栏 ============ */
.topbar{background:var(--white);border-bottom:1px solid var(--border);font-size:15px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{width:46px;height:46px;border-radius:8px;background:var(--brand);display:flex;align-items:center;justify-content:center;flex:none}
.brand-mark span{color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.brand-text{min-width:0}
.brand-name{font-size:19px;font-weight:700;color:var(--brand-dark);line-height:1.3;white-space:nowrap}
.brand-slogan{font-size:13px;color:var(--muted);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-contact{display:flex;align-items:center;gap:10px;flex:none}
.topbar-contact .phone-num{font-size:20px;font-weight:700;color:var(--brand);letter-spacing:.5px;white-space:nowrap}
.topbar-contact .phone-sub{font-size:12px;color:var(--muted);text-align:right;line-height:1.4}
.tel-icon{width:36px;height:36px;border-radius:50%;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}
.tel-icon svg{stroke:var(--brand)}

/* ============ 顶部第二行：主导航（单独通栏） ============ */
.navbar{background:var(--brand);position:sticky;top:0;z-index:50}
.navbar .container{display:flex;align-items:center;justify-content:space-between;min-height:54px}
.nav-links{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-links a{
  color:rgba(255,255,255,.9);font-size:15px;padding:15px 16px;display:block;
  border-bottom:3px solid transparent;transition:.2s;white-space:nowrap;
}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.1);border-bottom-color:var(--accent)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:12px}
.nav-toggle svg{stroke:#fff}

/* ============ 首屏 ============ */
.hero{
  background:linear-gradient(135deg,#241834 0%,#3A2857 45%,#4C3673 100%);
  color:#fff;padding:88px 0 80px;position:relative;overflow:hidden;
}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;background:rgba(191,164,106,.12)}
.hero::before{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:linear-gradient(90deg,transparent,rgba(191,164,106,.6),transparent)}
.hero .container{position:relative;z-index:2;max-width:940px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);
  border:1px solid rgba(191,164,106,.45);border-radius:999px;padding:6px 14px;font-size:13.5px;margin-bottom:22px;
  color:rgba(255,255,255,.92);letter-spacing:.5px;
}
.hero h1{font-size:42px;line-height:1.4;font-weight:600;margin-bottom:20px;letter-spacing:1.5px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{font-size:17px;line-height:1.85;color:rgba(255,255,255,.9);margin-bottom:30px;max-width:760px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;
  min-height:48px;border:1px solid transparent;transition:.2s;
}
.btn-primary{background:var(--accent);color:#241A0A;letter-spacing:.5px}
.btn-primary:hover{background:#CDB37A;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(191,164,106,.75);letter-spacing:.5px}
.btn-ghost:hover{background:rgba(191,164,106,.14)}
.btn-block{width:100%}

/* ============ 数据信任区 ============ */
.stats{background:var(--bg);padding:44px 0;border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-num{font-size:38px;font-weight:700;color:var(--brand);line-height:1.2}
.stat-num small{font-size:18px;font-weight:600;margin-left:2px}
.stat-label{font-size:14px;color:var(--muted);margin-top:6px}

/* ============ 通用区块 ============ */
.section{padding:76px 0}
.section-alt{background:var(--bg)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-kicker{font-size:12px;color:var(--accent);font-weight:600;letter-spacing:4px;margin-bottom:12px}
.sec-title{font-size:30px;font-weight:600;color:var(--brand-dark);line-height:1.45;letter-spacing:1px}
.sec-desc{font-size:16px;color:var(--muted);margin-top:12px}

/* 服务卡片 */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 22px;transition:.2s;display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:var(--brand-2)}
.card-icon{width:52px;height:52px;border-radius:10px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card h3{font-size:19px;font-weight:700;color:var(--brand-dark);margin-bottom:10px}
.card p{font-size:15px;color:var(--muted);line-height:1.8}
.card ul{margin-top:12px;padding-left:0;list-style:none}
.card ul li{font-size:14px;color:var(--muted);padding-left:20px;position:relative;margin-bottom:6px}
.card ul li::before{content:"";position:absolute;left:4px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-2)}

/* 实力区 */
.strength{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;align-items:center}
.strength-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.strength-item{background:var(--white);border-left:4px solid var(--accent);border-radius:6px;padding:18px 18px;box-shadow:var(--shadow)}
.strength-item h4{font-size:17px;color:var(--brand-dark);margin-bottom:6px}
.strength-item p{font-size:14px;color:var(--muted);line-height:1.75}

/* 案例 */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.2s}
.case-card:hover{box-shadow:var(--shadow-hover)}
.case-thumb{height:150px;background:linear-gradient(120deg,#F1EDF6,#E5DEEF);display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:15px}
.case-body{padding:20px}
.case-body h4{font-size:17px;color:var(--brand-dark);margin-bottom:8px}
.case-body p{font-size:14px;color:var(--muted);line-height:1.8}
.case-tag{display:inline-block;background:var(--accent-soft);color:#7A5F11;font-size:12px;padding:3px 10px;border-radius:4px;margin-bottom:10px}

/* FAQ */
.faq{max-width:860px;margin:0 auto}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-item summary{
  cursor:pointer;padding:18px 22px;font-size:17px;font-weight:600;color:var(--brand-dark);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";width:10px;height:10px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(45deg);transition:.2s;flex:none}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-item .faq-answer{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.9}

/* 底部 CTA 条 */
.cta-bar{background:linear-gradient(120deg,var(--brand-dark),var(--brand-2));color:#fff;padding:46px 0;text-align:center}
.cta-bar h2{font-size:26px;margin-bottom:10px}
.cta-bar p{color:rgba(255,255,255,.85);margin-bottom:22px;font-size:16px}
.cta-bar .btn-ghost{border-color:rgba(255,255,255,.6)}

/* ============ 页脚 ============ */
.footer{background:#221A33;color:rgba(255,255,255,.72);padding:52px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-bottom:34px}
.footer h5{color:#fff;font-size:16px;margin-bottom:14px;font-weight:600}
.footer p,.footer li{line-height:2;font-size:14px}
.footer ul{list-style:none}
.footer a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:var(--accent)}

/* ============ 响应式（7档断点） ============ */
@media (max-width:1200px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:34px}
}
@media (max-width:1024px){
  .strength{grid-template-columns:1fr}
  .cases{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .topbar .container{flex-wrap:wrap;min-height:auto}
  .brand-slogan{white-space:normal}
  .nav-toggle{display:block}
  .nav-links{display:none;flex-direction:column;width:100%;padding-bottom:8px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 4px;border-bottom:none;font-size:15px}
  .nav-links a:hover,.nav-links a.active{border-bottom-color:transparent;background:transparent;color:var(--accent)}
  .hero{padding:52px 0 44px}
  .hero h1{font-size:27px}
  .hero p.lead{font-size:16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .stat-num{font-size:32px}
  .section{padding:46px 0}
  .sec-title{font-size:24px}
  .cards,.cases,.strength-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}
@media (max-width:480px){
  .hero h1{font-size:23px}
  .btn{padding:13px 18px;font-size:15px;width:100%}
  .hero-cta{gap:10px}
  .sec-title{font-size:21px}
  .topbar-contact .phone-num{font-size:17px}
}
@media (max-width:375px){
  .hero h1{font-size:21px}
  .brand-name{font-size:16px}
  .stat-num{font-size:28px}
}

/* 无障碍：键盘焦点可见 */
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* ============ 内页通用组件 ============ */
.page-hero{background:linear-gradient(135deg,#241834 0%,#3A2857 60%,#4C3673 100%);color:#fff;padding:54px 0 48px;position:relative}
.page-hero h1{font-size:32px;font-weight:600;letter-spacing:1px;line-height:1.4;margin-bottom:12px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.85);max-width:780px;line-height:1.85}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.65);margin-bottom:14px}
.breadcrumb a{color:rgba(255,255,255,.8)}
.breadcrumb a:hover{color:var(--accent)}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* 时间轴 */
.timeline{position:relative;padding-left:26px;border-left:2px solid var(--border)}
.timeline-item{position:relative;padding-bottom:28px}
.timeline-item::before{content:"";position:absolute;left:-33px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--brand);border:2px solid #fff;box-shadow:0 0 0 2px var(--border)}
.timeline-year{font-size:15px;font-weight:700;color:var(--accent);letter-spacing:1px}
.timeline-item h4{font-size:17px;color:var(--brand-dark);margin:4px 0 6px;font-family:var(--serif)}
.timeline-item p{font-size:14.5px;color:var(--muted);line-height:1.8}

/* 表格 */
.table-wrap{overflow-x:auto;margin-top:8px}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:640px}
th,td{border:1px solid var(--border);padding:13px 15px;text-align:left;vertical-align:top;line-height:1.75}
th{background:var(--accent-soft);color:var(--brand-dark);font-weight:600;white-space:nowrap}
td{color:var(--muted)}
td strong{color:var(--ink)}

/* 教师卡 */
.teacher-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 22px;transition:.2s}
.teacher-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.teacher-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{width:58px;height:58px;border-radius:50%;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;flex:none}
.teacher-card h4{font-size:17px;color:var(--brand-dark);font-family:var(--serif)}
.teacher-card .t-meta{font-size:13px;color:var(--muted)}
.teacher-card p{font-size:14px;color:var(--muted);line-height:1.8}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.badge{font-size:12px;background:var(--accent-soft);color:#6A5518;padding:4px 10px;border-radius:3px}

/* 流程步骤 */
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;text-align:center}
.step-num{width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:15px;font-weight:600}
.step h4{font-size:15.5px;color:var(--brand-dark);margin-bottom:6px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.7}

/* 提示条 */
.note{background:var(--accent-soft);border-left:4px solid var(--accent);padding:14px 18px;font-size:14.5px;color:var(--muted);border-radius:4px;line-height:1.8;margin-top:20px}

/* 表单 */
.form-wrap{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-group label{display:block;font-size:14px;color:var(--ink);margin-bottom:7px;font-weight:500}
.form-group label .req{color:#C0392B}
input,textarea,select{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius);
  font-size:15px;font-family:inherit;color:var(--ink);background:#fff;min-height:46px;
}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand)}
textarea{min-height:110px;resize:vertical}
.form-full{grid-column:1 / -1}
.form-tip{font-size:13px;color:var(--muted);margin-top:14px}

/* 联系信息块 */
.contact-block{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;height:100%}
.contact-item{display:flex;gap:14px;margin-bottom:22px}
.contact-item:last-child{margin-bottom:0}
.contact-ico{width:42px;height:42px;border-radius:8px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;flex:none}
.contact-item h5{font-size:14px;color:var(--muted);font-weight:500;margin-bottom:2px}
.contact-item p{font-size:16px;color:var(--brand-dark);font-weight:600;line-height:1.6}

/* 404 */
.nf{text-align:center;padding:100px 20px}
.nf h1{font-size:52px;color:var(--brand);font-family:var(--serif)}

@media (max-width:1024px){
  .grid-2,.grid-3,.teacher-grid{grid-template-columns:1fr 1fr}
  .process{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:768px){
  .page-hero{padding:40px 0 34px}
  .page-hero h1{font-size:24px}
  .grid-2,.grid-3,.teacher-grid{grid-template-columns:1fr}
  .process{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .form-wrap{padding:22px}
  .nf{padding:70px 20px}
}
@media (max-width:480px){
  .page-hero h1{font-size:21px}
  .process{grid-template-columns:1fr}
}

/* LOGO 图片与案例图片 */
.brand-logo{height:48px;width:auto;display:block}
.case-thumb img{width:100%;height:100%;object-fit:cover}
@media (max-width:768px){.brand-logo{height:38px}}
@media (max-width:480px){.brand-logo{height:32px}}

/* ============ 两大板块卡片 ============ */
.blocks{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.block-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 28px;transition:.2s}
.block-card:hover{box-shadow:var(--shadow-hover)}
.block-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:16px}
.block-card h3{font-size:21px;font-family:var(--serif);color:var(--brand-dark);font-weight:600}
.block-list{list-style:none;margin:0}
.block-list li{
  font-size:14.5px;color:var(--muted);line-height:1.85;padding:11px 0;
  border-top:1px dashed var(--border);
}
.block-list li:first-child{border-top:none}
.block-list strong{color:var(--brand-dark);font-weight:600}

/* ============ 家长与学员评价 ============ */
.reviews-group{margin-bottom:34px}
.reviews-group:last-of-type{margin-bottom:0}
.reviews-subtitle{
  font-family:var(--serif);font-size:19px;font-weight:600;color:var(--brand-dark);
  margin:0 0 16px;padding-left:12px;border-left:3px solid var(--accent);line-height:1.4;
}
.reviews{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.review-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;transition:.2s}
.review-card:hover{box-shadow:var(--shadow-hover)}
.review-empty{
  grid-column:1 / -1;font-size:14px;color:var(--muted);line-height:1.9;
  padding:18px 20px;border:1px dashed var(--border);border-radius:var(--radius);background:#fff;
}
.review-shot-link{display:block;margin-bottom:14px}
.review-shot-link:hover .review-shot{border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.review-shot{width:100%;border-radius:6px;border:1px solid var(--border);cursor:zoom-in;transition:.2s}
.review-quote{font-size:15px;color:var(--ink);line-height:1.95}
.review-meta{display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}
.review-avatar{width:38px;height:38px;border-radius:50%;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;flex:none}
.review-name{font-size:14.5px;font-weight:600;color:var(--brand-dark)}
.review-tag{font-size:12.5px;color:var(--muted)}

@media (max-width:1024px){
  .blocks{grid-template-columns:1fr}
  .reviews{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .reviews{grid-template-columns:1fr}
  .block-card{padding:24px 20px}
}

/* ============ 资讯列表与文章正文 ============ */
.news-list{display:flex;flex-direction:column;gap:14px}
.news-item{
  display:flex;gap:22px;align-items:flex-start;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:22px 24px;transition:.2s;
}
.news-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.news-date{font-size:13.5px;color:var(--accent);font-weight:600;white-space:nowrap;padding-top:3px;min-width:88px}
.news-main h3{font-size:18px;font-family:var(--serif);color:var(--brand-dark);font-weight:600;margin-bottom:8px;line-height:1.5}
.news-main p{font-size:14.5px;color:var(--muted);line-height:1.8}
.news-more{display:inline-block;margin-top:10px;font-size:14px;color:var(--brand);font-weight:600}

.article{max-width:820px;margin:0 auto;font-size:16.5px;line-height:2;color:var(--ink)}
.article p{margin-bottom:16px}
.article h2{font-family:var(--serif);font-size:22px;color:var(--brand-dark);font-weight:600;margin:32px 0 14px;line-height:1.5}
.article h3{font-size:18px;color:var(--brand);font-weight:600;margin:22px 0 10px}
.article ul{margin:0 0 18px 0;padding-left:22px}
.article li{margin-bottom:10px;color:var(--ink);line-height:1.9}
.article strong{color:var(--brand-dark)}

@media (max-width:768px){
  .news-item{flex-direction:column;gap:10px;padding:20px}
  .news-date{min-width:0}
  .news-main h3{font-size:17px}
  .article{font-size:16px}
  .article h2{font-size:19px}
}