:root{--blue:#1a56db;--blue-dark:#1e40af;--blue-light:#eff6ff;--gold:#f57c00;--gold-light:#fff7ed;--white:#fff;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-600:#6b7280;--gray-800:#374151;--gray-900:#111827;--font:"PingFang SC","Microsoft YaHei",sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--gray-900);background:var(--gray-50);line-height:1.7}
.container{max-width:750px;margin:0 auto;padding:0 16px}
.nav{background:var(--white);border-bottom:1px solid var(--gray-200);position:sticky;top:0;z-index:100}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:52px;max-width:750px;margin:0 auto;padding:0 16px}
.nav-logo{font-size:16px;font-weight:700;color:var(--blue);text-decoration:none}
.nav-logo img{height:32px;vertical-align:middle;margin-right:6px}
.hero{background:linear-gradient(135deg,#eff6ff,#dbeafe,#fff7ed);padding:48px 16px 36px;text-align:center}
.hero-badge{display:inline-block;background:var(--blue);color:#fff;padding:5px 14px;border-radius:20px;font-size:12px;font-weight:600;margin-bottom:14px}
.hero h1{font-size:22px;color:var(--gray-900);line-height:1.4;margin-bottom:8px}
.hero h1 span{color:var(--gold)}
.hero-sub{font-size:14px;color:var(--gray-600);margin-bottom:20px;line-height:1.6}
.btn{display:inline-flex;align-items:center;gap:6px;padding:12px 26px;border-radius:24px;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;border:none;transition:all .15s;min-height:44px}
.btn-gold{background:var(--gold);color:#fff}.btn-gold:hover{background:#e65100}
.btn-outline{background:var(--white);color:var(--blue);border:2px solid var(--blue)}.btn-outline:hover{background:var(--blue-light)}
section{padding:36px 0}
.section-title{font-size:20px;color:var(--gray-900);text-align:center;margin-bottom:6px}
.section-sub{font-size:13px;color:var(--gray-600);text-align:center;margin-bottom:24px}
.trust-bar{background:linear-gradient(135deg,#f9fafb,#eff6ff,#fff7ed);padding:24px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;text-align:center}
.trust-item{background:var(--white);border-radius:10px;padding:14px 8px;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.trust-item .num{font-size:26px;font-weight:800;color:var(--gold);line-height:1.1}
.trust-item .lbl{font-size:11px;color:var(--gray-600);margin-top:4px}
.card{background:var(--white);border-radius:12px;padding:20px;margin-bottom:14px;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.card-blue{border-left:3px solid var(--blue)}
.steps{display:grid;gap:12px}
.step{display:flex;gap:12px;align-items:flex-start}
.step-num{width:32px;height:32px;background:var(--blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}
.step h3{font-size:14px;color:var(--gray-900);margin-bottom:2px}.step p{font-size:12px;color:var(--gray-600)}
.teacher-card{display:flex;gap:14px;align-items:flex-start}
.teacher-photo{width:72px;height:72px;border-radius:50%;object-fit:cover;flex-shrink:0}
.teacher-badges{display:flex;flex-wrap:wrap;gap:5px;margin:6px 0}
.teacher-badges span{background:var(--blue-light);color:var(--blue);padding:3px 8px;border-radius:12px;font-size:11px;font-weight:600}
.faq-item{background:var(--white);border-radius:12px;padding:14px 16px;box-shadow:0 2px 8px rgba(0,0,0,.04);border-left:3px solid var(--blue);margin-bottom:8px}
.faq-item summary{font-size:14px;font-weight:600;color:var(--gray-900);cursor:pointer;list-style:none}
.faq-item summary::after{content:"+";float:right;font-size:18px;color:var(--blue)}
.faq-item[open] summary::after{content:"−"}
.faq-item p{font-size:12px;color:var(--gray-600);margin-top:8px;line-height:1.7}
.cta{background:linear-gradient(135deg,var(--blue-dark),var(--blue));color:#fff;text-align:center;padding:36px 16px}
.cta h2{font-size:18px;margin-bottom:6px}.cta .phone{font-size:16px;font-weight:700}.cta p{font-size:12px;opacity:.8}
.footer{background:var(--gray-900);color:var(--gray-600);text-align:center;padding:24px 16px 72px;font-size:11px}.footer a{color:#93c5fd}
.sticky-bar{position:fixed;bottom:0;left:0;right:0;background:var(--white);padding:10px 16px;box-shadow:0 -2px 12px rgba(0,0,0,.08);display:flex;gap:8px;z-index:999}
.sticky-bar .btn{flex:1;text-align:center;font-size:13px}
@media(max-width:640px){.trust-grid{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:18px}}