*{margin:0;padding:0;box-sizing:border-box}
:root{--pri:#7c3aed;--pri-d:#6d28d9;--acc:#a78bfa;--ink:#1f2937;--mut:#6b7280;--bg:#f5f6fa;--card:#fff;--line:#e5e7eb}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

.edu-header{position:sticky;top:0;z-index:50;background:linear-gradient(135deg,#7c3aed,#4f46e5);color:#fff;box-shadow:0 2px 12px rgba(76,29,149,.18)}
.edu-header .bar{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.edu-header .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px}
.edu-header .brand .logo{width:32px;height:32px;border-radius:8px;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.edu-header .badge{background:rgba(255,255,255,.18);padding:3px 12px;border-radius:20px;font-size:12px;font-weight:500}
.edu-header a.back{color:#fff;font-size:13px;border:1px solid rgba(255,255,255,.4);padding:5px 12px;border-radius:20px;white-space:nowrap;transition:.2s}
.edu-header a.back:hover{background:rgba(255,255,255,.15)}

.hero{background:linear-gradient(135deg,#7c3aed 0%,#6d28d9 55%,#4f46e5 100%);color:#fff;padding:64px 20px;text-align:center}
.hero .tag{display:inline-block;background:rgba(255,255,255,.16);padding:4px 14px;border-radius:20px;font-size:13px;margin-bottom:16px}
.hero h1{font-size:36px;line-height:1.25;margin-bottom:14px;font-weight:800;letter-spacing:.5px}
.hero .sub{font-size:17px;opacity:.93;max-width:660px;margin:0 auto 28px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:28px;font-size:15px;font-weight:600;transition:.2s}
.btn-solid{background:#fff;color:var(--pri-d);box-shadow:0 4px 16px rgba(0,0,0,.15)}
.btn-solid:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(0,0,0,.2)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-lg{padding:15px 38px;font-size:16px}

.section{padding:56px 20px}
.section.alt{background:#fff}
.sec-title{font-size:26px;text-align:center;margin-bottom:8px;font-weight:800}
.sec-title::after{content:"";display:block;width:46px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--pri),var(--acc));margin:14px auto 0}
.sec-lead{max-width:760px;margin:18px auto 0;color:var(--mut);font-size:16px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:34px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px 22px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(109,40,217,.12);border-color:var(--acc)}
.card .ic{font-size:30px;margin-bottom:12px}
.card h3{font-size:17px;margin-bottom:8px;color:var(--pri-d)}
.card p{font-size:14px;color:var(--mut)}
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:28px}
.chip{background:linear-gradient(135deg,#f3e8ff,#ede9fe);color:var(--pri-d);border:1px solid #ddd6fe;padding:8px 18px;border-radius:24px;font-size:14px;font-weight:500}

.cta-banner{background:linear-gradient(135deg,#6d28d9,#7c3aed);color:#fff;padding:56px 20px;text-align:center}
.cta-banner h2{font-size:28px;margin-bottom:10px;font-weight:800}
.cta-banner p{opacity:.93;margin-bottom:24px;font-size:16px}
.cta-hint{margin-top:18px;font-size:13px;opacity:.75}
.qr-row{display:flex;align-items:center;justify-content:center;gap:18px;margin:22px 0 6px;flex-wrap:wrap}
.qr{width:136px;height:136px;border-radius:8px;background:#fff;padding:5px;box-shadow:0 4px 14px rgba(0,0,0,.18)}
.qr-cap{font-size:14px;line-height:1.8;opacity:.95;text-align:left}

.edu-footer{background:#1f2430;color:#9aa3b2;padding:28px 20px;text-align:center;font-size:13px}
.edu-footer p{margin:4px 0}
.edu-footer a{color:#c4b5fd}
.edu-footer .c{margin-top:8px;color:#6b7280}

@media(max-width:640px){.hero h1{font-size:28px}.hero .sub{font-size:15px}.sec-title{font-size:22px}}