:root{
  --primary:#1769e0;
  --primary-dark:#0f4fb8;
  --primary-soft:#eaf4ff;
  --accent:#f8c400;
  --accent-dark:#d9a900;
  --accent-soft:#fff8d6;
  --ink:#0b1f44;
  --muted:#5f6f89;
  --bg:#ffffff;
  --tint:#f7fbff;
  --border:#dce8f6;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,"Noto Sans SC",system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
img{max-width:100%}
a{color:inherit}
.container{width:min(1140px,92%);margin:auto}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(23,105,224,.10)}
.nav-wrap{min-height:76px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;margin-right:auto}
.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--primary) 0 66%,var(--accent) 66% 100%);color:white;font-weight:900;box-shadow:0 8px 22px rgba(23,105,224,.18)}
.brand strong{display:block;color:var(--ink)}
.brand small{display:block;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:18px}
.main-nav a{text-decoration:none;font-weight:750;font-size:.94rem}
.main-nav a:not(.nav-cta):hover{color:var(--primary)}
.nav-cta{background:var(--accent);color:var(--ink)!important;padding:10px 15px;border-radius:11px;box-shadow:0 8px 18px rgba(248,196,0,.24)}
.nav-cta:hover{background:#ffd21c}
.language-toggle,.menu-toggle{border:1px solid var(--border);background:white;border-radius:10px;padding:9px 12px;font-weight:800;cursor:pointer;color:var(--ink)}
.menu-toggle{display:none}
.hero{background:radial-gradient(circle at 82% 14%,rgba(248,196,0,.18),transparent 27%),radial-gradient(circle at 70% 8%,#ddecff,transparent 34%),linear-gradient(180deg,#fbfdff,#fff);padding:84px 0 64px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;width:210px;height:210px;border-radius:50%;right:-95px;bottom:-75px;background:rgba(248,196,0,.13);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:50px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;color:var(--primary);background:var(--primary-soft);border:1px solid #cfe3ff;padding:5px 10px;border-radius:999px;font-weight:900;text-transform:uppercase;letter-spacing:.07em;font-size:.79rem}
.hero h1,.section-heading h2{line-height:1.12;margin:.2em 0}
.hero h1{font-size:clamp(2.5rem,6vw,4.8rem);max-width:850px;letter-spacing:-.025em}
.hero-text,.section-heading>p{color:var(--muted);font-size:1.08rem}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 18px}
.button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:13px;padding:12px 18px;font-weight:850;border:1px solid var(--border);transition:.2s;cursor:pointer}
.button:hover{transform:translateY(-1px)}
.button.primary{background:var(--primary);color:white!important;border-color:var(--primary);box-shadow:0 9px 20px rgba(23,105,224,.18)}
.button.primary:hover{background:var(--primary-dark)}
.button.enroll{background:var(--accent);color:var(--ink)!important;border-color:var(--accent);box-shadow:0 9px 20px rgba(248,196,0,.25)}
.button.enroll:hover{background:#ffd21c}
.button.secondary{background:white;color:var(--ink)}
.button.full{width:100%}
.trust-row{display:flex;gap:18px;flex-wrap:wrap;color:#29466e;font-weight:750}
.trust-row>span::first-letter{color:var(--accent-dark)}
.quick-enroll-card,.program-card,.why-card,.teacher-card,.quote-card{background:white;border:1px solid var(--border);border-radius:22px;padding:24px;box-shadow:0 14px 38px rgba(11,31,68,.07)}
.quick-enroll-card{position:relative;border-top:4px solid var(--accent)}
.card-badge,.level{display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--accent-soft);color:#7a5a00;font-weight:850;font-size:.8rem;border:1px solid #ffe788}
.mini-form{display:grid;gap:12px}
.mini-form label span{display:block;font-weight:800;margin-bottom:5px}
.mini-form select{width:100%;padding:11px;border:1px solid var(--border);border-radius:10px;background:white}
.recommendation-result{margin-top:12px;font-weight:800;color:var(--primary)}
.section{padding:76px 0}
.tinted{background:linear-gradient(180deg,var(--tint),#fff)}
.stats-strip{padding:26px 0;background:linear-gradient(90deg,#e7f3ff,#f4f9ff 60%,#fff7cf);color:var(--ink);border-top:1px solid #d5e9ff;border-bottom:1px solid #e3edf8}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats-grid strong{display:block;font-size:1.8rem;color:var(--primary)}
.stats-grid span{color:#52627c}
.section-heading{max-width:790px;margin-bottom:32px}
.section-heading h2{font-size:clamp(2rem,4vw,3rem);letter-spacing:-.015em}
.program-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.program-card{transition:.2s}
.program-card:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(11,31,68,.10)}
.program-card h3{font-size:1.35rem;margin:.65rem 0}
.program-card ul{padding-left:20px}
.program-card.featured{border-color:#acd1ff;box-shadow:inset 0 4px 0 var(--primary),0 14px 38px rgba(11,31,68,.07)}
.program-card:nth-child(2n) .level{background:var(--primary-soft);color:var(--primary);border-color:#cfe3ff}
.text-link{display:inline-block;margin-top:10px;color:var(--primary);font-weight:900;text-decoration:none}
.text-link:hover{text-decoration:underline}
.why-grid,.teacher-grid,.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.teacher-grid{grid-template-columns:repeat(2,1fr)}
.teacher-card{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;border-top:4px solid #dbeafe}
.teacher-card:first-child{border-top-color:var(--accent)}
.teacher-card h2,.teacher-card h3{margin-top:0}
.learning-gallery{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
.accordion details{border:1px solid var(--border);border-radius:14px;padding:16px 18px;margin:10px 0;background:white}
.accordion summary{font-weight:850;cursor:pointer;color:var(--ink)}
.site-footer{background:#0b1f44;color:#cfddf1;padding:52px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.site-footer strong{color:white}
.site-footer a{color:#a9d0ff}
.copyright{padding-top:28px;margin-top:24px;border-top:1px solid #29466e}
.floating-enroll{position:fixed;right:18px;bottom:18px;background:var(--accent);color:var(--ink);text-decoration:none;font-weight:900;padding:12px 18px;border-radius:999px;box-shadow:0 12px 28px rgba(248,196,0,.32);z-index:90}
.floating-enroll:hover{background:#ffd21c}
@media(max-width:900px){.hero-grid,.program-grid,.why-grid,.testimonial-grid{grid-template-columns:1fr 1fr}.teacher-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.main-nav{display:none;position:absolute;top:76px;left:0;right:0;background:white;padding:18px 4%;border-bottom:1px solid var(--border);flex-direction:column;align-items:flex-start}.main-nav.open{display:flex}.menu-toggle{display:block}.hero-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.program-grid,.why-grid,.testimonial-grid,.footer-grid{grid-template-columns:1fr}.teacher-card{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.hero{padding-top:54px}.section{padding:58px 0}.brand small{display:none}.floating-enroll{left:16px;right:16px;text-align:center}.hero h1{font-size:2.5rem}}

/* v10 adjustment: keep the Why Us features horizontal on desktop */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.feature-grid article{
  background:#fff;
  border:1px solid var(--border);
  border-radius:22px;
  padding:24px;
  box-shadow:0 14px 38px rgba(11,31,68,.07);
}
.feature-grid .icon{
  width:44px;
  height:44px;
  border-radius:14px;
  display:grid;
  place-items:center;
  margin-bottom:16px;
  background:var(--primary-soft);
  color:var(--primary);
  font-weight:900;
}
.feature-grid article:nth-child(3) .icon,
.feature-grid article:nth-child(4) .icon{
  background:var(--accent-soft);
  color:#8a5a00;
}
@media(max-width:900px){
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media(max-width:620px){
  .feature-grid{grid-template-columns:1fr;}
}
/* Mobile optimization */
@media (max-width: 600px) {

  /* 顶部 Academy 名称 */
  .logo-text {
    font-size: 22px;
    line-height: 1.15;
  }

  /* 页面大标题 */
  h1 {
    font-size: 34px;
    line-height: 1.15;
  }

  /* Section 标题 */
  h2 {
    font-size: 27px;
    line-height: 1.2;
  }

  h3 {
    font-size: 21px;
    line-height: 1.25;
  }

  /* 正文 */
  p {
    font-size: 17px;
    line-height: 1.65;
  }

  /* 手机左右留白 */
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  /* Section 不要上下空太多 */
  section {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  /* 按钮 */
  .btn,
  .cta-button {
    font-size: 18px;
    padding: 14px 20px;
  }
}