:root{
  --navy:#3A4E9C;
  --navy-2:#4a5fb0;
  --navy-deep:#16283f;
  --orange:#F0A500;
  --orange-2:#f7b820;
  --bg:#F5F7FA;
  --gray:#5a6b7e;
  --gray-2:#8a97a6;
  --line:#e6ebf1;
  --white:#fff;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",sans-serif;
  color:#2e3b4e;
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.container{max-width:1160px;margin:0 auto;padding:0 24px;}

/* ---------- 导航栏 ---------- */
.nav{background:#23346e;box-shadow:0 1px 0 rgba(0,0,0,.12);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;}
.logo{display:flex;align-items:center;gap:12px;}
.logo img{height:52px;width:auto;flex:0 0 auto;filter:invert(1);}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:19px;color:var(--navy);letter-spacing:.5px;}
.logo-text span{font-size:11px;color:var(--gray-2);letter-spacing:1px;text-transform:uppercase;}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none;}
.nav-links a{font-size:15px;color:#c3d0e4;position:relative;padding:6px 0;transition:color .2s;}
.nav-links a:hover{color:#ffd98a;}
.nav-links a.active{color:#fff;font-weight:600;}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--orange);border-radius:2px;}
.nav-cta{display:inline-flex;align-items:center;gap:6px;background:var(--orange);color:#fff;padding:9px 18px;border-radius:24px;font-size:14px;font-weight:600;transition:background .2s;}
.nav-cta:hover{background:var(--orange-2);}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;margin:4px 0;border-radius:2px;}

/* ---------- 首页 Hero（单屏静态） ---------- */
body.home{height:100vh;overflow:hidden;display:flex;flex-direction:column;}
.hero{background:linear-gradient(150deg,#2b3d80 0%,#3A4E9C 55%,#4a5fb0 100%);color:#fff;position:relative;overflow:hidden;}
.home-hero{flex:1 1 auto;display:flex;align-items:center;justify-content:center;text-align:center;padding:20px 24px;}
.home-hero::before{content:"";position:absolute;left:-140px;bottom:-160px;width:460px;height:460px;border-radius:50%;border:1px solid rgba(255,255,255,.12);}
.home-hero::after{content:"";position:absolute;right:-100px;top:-120px;width:360px;height:360px;border-radius:50%;border:1px dashed rgba(255,255,255,.25);}
.home-hero .inner{position:relative;z-index:2;transform:translateY(-34px);}
.hero-logo{height:80px;width:auto;margin:0 auto 22px;filter:invert(1);}
.slogan{display:flex;flex-direction:column;align-items:center;gap:4px;}
.slogan-line{font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:21px;color:#e6eefb;letter-spacing:7px;font-weight:400;}
.slogan-brand{font-size:54px;color:#fff;letter-spacing:20px;font-weight:700;line-height:1.2;margin:10px 0;}
.hero-sub{margin:26px auto 0;font-size:15px;color:#ccd7ea;max-width:560px;line-height:1.9;}
.hero-tags{margin-top:28px;display:flex;flex-direction:column;gap:12px;align-items:center;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;}
.tag-row span{font-size:13px;padding:6px 14px;border-radius:16px;border:1px solid transparent;white-space:nowrap;}
.tag-row.r1 span{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.34);color:#fff;}
.tag-row.r2 span{background:rgba(240,165,0,.18);border-color:rgba(240,165,0,.5);color:#ffd98a;}
.tag-row.r3 span{background:rgba(86,205,180,.18);border-color:rgba(86,205,180,.55);color:#9fe9d8;}
.hero-actions{margin-top:36px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;border-radius:30px;font-size:15px;font-weight:600;transition:all .2s;cursor:pointer;border:none;}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 10px 24px rgba(240,165,0,.35);}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55);}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}

/* ---------- 子页面标题横幅 ---------- */
.page-hero{background:linear-gradient(150deg,#2b3d80 0%,#3A4E9C 55%,#4a5fb0 100%);color:#fff;text-align:center;padding:42px 24px;position:relative;overflow:hidden;}
.page-hero h1{font-size:36px;font-weight:700;letter-spacing:2px;margin-bottom:10px;}
.page-hero p{font-size:15px;color:#ccd7ea;}

/* ---------- 通用区块 ---------- */
.section{padding:76px 0;}
.section-head{text-align:center;margin-bottom:46px;position:relative;}
.section-head .kicker{display:inline-flex;font-size:13px;color:var(--orange);font-weight:600;letter-spacing:3px;margin-bottom:12px;}
.section-head h2{font-size:32px;color:var(--navy);font-weight:700;letter-spacing:.5px;}
.section-head p.sub{font-size:15px;color:var(--gray);margin-top:12px;}
.title-deco{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:16px;}
.title-deco .bar{width:38px;height:4px;background:var(--orange);border-radius:2px;}
.title-deco .dot{width:6px;height:6px;border-radius:50%;background:var(--orange);}

/* ---------- 关于我们 ---------- */
.about{background:#fff;}
.about-grid{display:flex;gap:48px;align-items:center;}
.about-text{flex:1 1 55%;}
.about-text .lead{font-size:18px;color:var(--navy);font-weight:600;margin-bottom:18px;line-height:1.8;}
.about-text p{color:#44536a;margin-bottom:14px;font-size:15px;}
.about-points{margin-top:22px;display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.point{display:flex;gap:12px;align-items:flex-start;background:var(--bg);border-radius:12px;padding:16px;}
.point .ic{flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--navy);display:flex;align-items:center;justify-content:center;color:#fff;}
.point .ic svg{width:20px;height:20px;}
.point b{display:block;font-size:15px;color:var(--navy);margin-bottom:3px;}
.point span{font-size:13px;color:var(--gray);}
.about-visual{flex:0 0 40%;}
.about-visual .frame{border-radius:16px;overflow:hidden;box-shadow:0 20px 50px rgba(58,78,156,.16);}
.about-photo{width:100%;height:100%;object-fit:cover;display:block;}

/* ---------- 课程体系（六宫格） ---------- */
.courses{background:var(--bg);}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px 26px;}
.course-item{text-align:center;padding:28px 22px;background:#fff;border-radius:16px;transition:all .25s;border:1px solid transparent;position:relative;}
.course-item:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(58,78,156,.12);border-color:var(--line);}
.course-item .icon-wrap{width:74px;height:74px;margin:0 auto 18px;border-radius:50%;background:var(--navy);display:flex;align-items:center;justify-content:center;color:#fff;transition:background .2s;}
.course-item:hover .icon-wrap{background:var(--orange);}
.course-item .icon-wrap svg{width:36px;height:36px;}
.course-item h3{font-size:19px;color:var(--navy);font-weight:700;margin-bottom:10px;}
.course-item p{font-size:14px;color:var(--gray);}
.badge-hot{position:absolute;top:16px;right:16px;background:var(--orange);color:#fff;font-size:11px;padding:3px 10px;border-radius:12px;font-weight:600;}

/* ---------- 开设科目 ---------- */
.subjects{background:#fff;}
.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.subject-card{background:var(--bg);border-radius:14px;padding:24px 20px;text-align:center;transition:all .2s;border-top:3px solid transparent;}
.subject-card:hover{border-top-color:var(--orange);transform:translateY(-4px);box-shadow:0 14px 30px rgba(58,78,156,.1);}
.subject-card .ic{width:52px;height:52px;margin:0 auto 12px;border-radius:12px;background:var(--navy);display:flex;align-items:center;justify-content:center;color:#fff;}
.subject-card .ic svg{width:28px;height:28px;}
.subject-card h3{font-size:17px;color:var(--navy);margin-bottom:8px;}
.subject-card p{font-size:12.5px;color:var(--gray);line-height:1.6;}
.subject-card p b{color:var(--orange);font-weight:600;}

/* ---------- 语言课程 ---------- */
.lang{background:var(--bg);}
.lang-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.lang-card{background:#fff;border-radius:16px;padding:30px 26px;box-shadow:0 2px 0 var(--line);}
.lang-card .tag{display:inline-block;font-size:12px;color:var(--orange);background:rgba(240,165,0,.12);padding:3px 12px;border-radius:14px;margin-bottom:14px;font-weight:600;}
.lang-card h3{font-size:20px;color:var(--navy);margin-bottom:12px;}
.lang-card .en{font-size:13px;color:var(--gray-2);font-weight:400;letter-spacing:1px;margin-left:6px;}
.lang-card ul{list-style:none;}
.lang-card li{position:relative;padding:8px 0 8px 22px;font-size:14px;color:#44536a;border-bottom:1px dashed var(--line);}
.lang-card li:last-child{border-bottom:none;}
.lang-card li::before{content:"";position:absolute;left:4px;top:16px;width:7px;height:7px;border-radius:50%;background:var(--orange);}

/* ---------- 联系我们 ---------- */
.contact{background:#fff;}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.contact-card{background:var(--bg);border-radius:16px;padding:34px 26px;text-align:center;}
.contact-card .ic{width:56px;height:56px;margin:0 auto 16px;border-radius:50%;background:var(--navy);display:flex;align-items:center;justify-content:center;color:#fff;}
.contact-card .ic svg{width:30px;height:30px;}
.contact-card h3{font-size:16px;color:var(--navy);margin-bottom:10px;}
.contact-card p{font-size:15px;color:#44536a;}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(120deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;text-align:center;padding:64px 0;}
.cta h2{font-size:30px;font-weight:700;margin-bottom:10px;}
.cta p{color:#ccd7ea;font-size:15px;margin-bottom:28px;}
.cta .phone-big{font-size:30px;color:#ffd98a;font-weight:700;letter-spacing:1px;}

/* ---------- 页脚 ---------- */
.footer{background:var(--navy-deep);color:#ccd7ea;padding:56px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08);}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer .brand{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.footer .brand img{height:46px;width:auto;filter:invert(1);}
.footer .brand b{color:#fff;font-size:18px;}
.footer .brand span{display:block;font-size:11px;color:#8a97a6;letter-spacing:1px;}
.footer p{color:#93a3b6;margin-bottom:8px;}
.footer ul{list-style:none;}
.footer li{margin-bottom:8px;}
.footer a:hover{color:var(--orange);}
.footer .contact-item{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;color:#93a3b6;}
.footer .contact-item .ic{flex:0 0 auto;color:var(--orange);}
.footer-bottom{text-align:center;padding-top:22px;color:#7a88a0;font-size:12.5px;}

/* ---------- 首页底部（联系方式 / 二维码 / 备案） ---------- */
.home-footer{flex:0 0 auto;background:var(--navy-deep);color:#ccd7ea;padding:18px 0 16px;}
.home-footer-inner{display:flex;align-items:center;justify-content:center;gap:48px;flex-wrap:wrap;}
.foot-block{display:flex;flex-direction:column;align-items:center;gap:3px;min-width:120px;}
.foot-label{font-size:12px;color:#8a97a6;}
.home-footer a{color:#fff;font-weight:600;transition:color .2s;}
.home-footer a:hover{color:var(--orange);}
.foot-phone{color:#fff;font-weight:600;}
.foot-qr img{width:76px;height:auto;border-radius:8px;background:#fff;padding:3px;}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .about-grid{flex-direction:column;}
  .course-grid{grid-template-columns:repeat(2,1fr);}
  .subject-grid{grid-template-columns:repeat(2,1fr);}
  .lang-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;gap:16px;box-shadow:0 10px 30px rgba(0,0,0,.08);}
  .nav-links.open{display:flex;}
  .nav-links a{color:#33445a;}
  .nav-links a.active{color:var(--navy);}
  .nav-toggle{display:block;}
  .slogan-brand{font-size:36px;letter-spacing:12px;}
  .slogan-line{font-size:17px;letter-spacing:4px;}
  .hero-logo{height:120px;}
  .page-hero h1{font-size:28px;}
  .course-grid{grid-template-columns:1fr;}
  .subject-grid{grid-template-columns:1fr;}
  .about-points{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
}