*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:"Arial Rounded MT Bold","PingFang SC","Microsoft YaHei",sans-serif;color:#17345c}a{color:inherit}[hidden]{display:none!important}
.login-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:radial-gradient(circle at 12% 12%,#fff7c9 0 8%,transparent 8.5%),linear-gradient(145deg,#eaf8ff,#fff5d4 58%,#ffe8f2)}.login-card{width:min(650px,100%);padding:30px 36px 34px;text-align:center;background:rgba(255,255,255,.96);border:2px solid #c9e5ff;border-radius:32px;box-shadow:0 24px 60px rgba(18,58,120,.16)}
.brand-row{height:128px;display:flex;justify-content:center;align-items:center;gap:4px}.brand-row img{width:112px;height:116px;object-fit:contain;filter:drop-shadow(0 9px 12px rgba(70,44,110,.15))}.brand-row img:first-child{width:82px;height:82px}.eyebrow{margin:4px 0;color:#1268d8;font-size:.9rem;font-weight:900;letter-spacing:.14em}.login-card h1{margin:10px 0 8px;font-size:clamp(1.75rem,5vw,2.7rem);letter-spacing:-.04em}.motto{display:inline-block;margin:0 auto 10px;padding:6px 16px;border-radius:999px;background:#fff1a9;color:#875500;font-weight:900}.intro{color:#60728c;line-height:1.7}
.login-card form{text-align:left}.login-card label{display:block;margin:16px 0 7px;font-weight:900}.login-card input{width:100%;padding:14px 16px;border:2px solid #aacff4;border-radius:15px;font:inherit;font-size:1.05rem;outline:none}.login-card #code{text-transform:uppercase}.login-card input:focus{border-color:#1268d8;box-shadow:0 0 0 4px rgba(18,104,216,.12)}.login-card button{width:100%;margin-top:12px;padding:15px;border:0;border-radius:15px;background:linear-gradient(135deg,#1268d8,#6548d8);color:white;font:inherit;font-size:1.1rem;font-weight:900;cursor:pointer}.login-card button:disabled{opacity:.66;cursor:wait}.login-error{padding:11px 14px;border:2px solid #ffabc6;border-radius:14px;background:#fff0f3;color:#a71e56;font-weight:800}.privacy-note{margin-bottom:0;color:#7a8799;font-size:.88rem;line-height:1.55}.bot-field{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}.login-card .consent{display:flex;align-items:flex-start;gap:10px;margin:15px 0 6px;padding:12px 13px;border-radius:14px;background:#f1f7ff;color:#52657e;font-size:.82rem;line-height:1.55;font-weight:700}.login-card .consent input{flex:0 0 auto;width:20px;height:20px;margin:1px 0 0;padding:0;accent-color:#1268d8}
.course-page{min-height:100vh;padding:clamp(18px,4vw,48px);background:linear-gradient(155deg,#eef9ff,#fff8da 50%,#ffeaf5)}.course-hero{max-width:1180px;margin:0 auto 26px;min-height:260px;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:34px clamp(26px,5vw,64px);overflow:hidden;border:2px solid rgba(255,255,255,.9);border-radius:36px;background:linear-gradient(125deg,#e4f7ff 0 54%,#dcd8ff);box-shadow:0 24px 60px rgba(40,76,130,.14)}.course-hero h1{margin:10px 0;font-size:clamp(2rem,5vw,4rem);letter-spacing:-.05em}.course-hero>div>p:last-child{font-size:clamp(1rem,2vw,1.35rem);font-weight:800;color:#596b89}.course-hero img{width:min(31vw,310px);height:220px;object-fit:contain;filter:drop-shadow(0 16px 18px rgba(64,41,111,.2))}
.lesson-grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.lesson-card{min-height:310px;display:flex;flex-direction:column;justify-content:space-between;padding:28px 24px 18px;text-decoration:none;border:2px solid rgba(255,255,255,.94);border-radius:28px;overflow:hidden;box-shadow:0 18px 42px rgba(48,70,108,.12)}.lesson-card.blue{background:linear-gradient(150deg,#dff5ff,#dcecff)}.lesson-card.pink{background:linear-gradient(150deg,#ffe2f0,#f0ddff)}.lesson-card.gold{background:linear-gradient(150deg,#fff1bd,#ffe0c9)}.lesson-card span{font-size:.8rem;font-weight:900;letter-spacing:.1em;color:#1268d8}.lesson-card h2{margin:9px 0;font-size:clamp(1.5rem,2.6vw,2.15rem);line-height:1.08}.lesson-card p{min-height:54px;line-height:1.55;color:#5c6e87}.lesson-card strong{display:inline-block;margin-top:6px;padding:9px 14px;border-radius:999px;background:#17345c;color:white}.lesson-card img{align-self:center;width:100%;height:140px;object-fit:contain;filter:drop-shadow(0 12px 14px rgba(70,44,110,.16))}.course-page footer{max-width:1180px;margin:24px auto 0;display:flex;justify-content:space-between;color:#64748b;font-size:.9rem}.course-page footer button{border:0;background:none;color:#1268d8;font:inherit;font-weight:900;cursor:pointer}
@media(max-width:820px){.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:250px;display:grid;grid-template-columns:1.5fr 1fr}.lesson-card img{height:170px}.course-hero{min-height:220px}.course-hero img{height:180px}}@media(max-width:520px){.login-card{padding:24px 18px 28px}.brand-row{height:100px}.brand-row img{width:88px;height:92px}.brand-row img:first-child{width:64px;height:64px}.course-page{padding:14px}.course-hero{padding:26px 22px;border-radius:26px}.course-hero img{width:34%;height:130px}.lesson-card{display:flex;min-height:270px}.lesson-card img{height:125px}.course-page footer{gap:12px;flex-direction:column}}