:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#3e504c;background:#f7f3ea}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 10% 0,#efe5ff 0,transparent 34%),radial-gradient(circle at 95% 10%,#fff0c8 0,transparent 30%),#f7f3ea}
button,a{font:inherit}.hidden{display:none!important}.diagnostic-app{width:min(760px,calc(100% - 28px));margin:auto;padding:20px 0 40px}
header{display:flex;justify-content:space-between;gap:14px;margin-bottom:18px;color:#8a7b6f;font-size:13px}header a{color:#6e568b;text-decoration:none;font-weight:750}
.intro-card,.quiz-card,.result-card{border:1px solid #eadfce;border-radius:24px;background:#fffdf9;box-shadow:0 14px 40px #705b4220}.intro-card{padding:24px 28px;margin-bottom:16px}.intro-card h1{margin:9px 0 6px;color:#544169;font-size:27px}.intro-card p{margin:0;line-height:1.7;color:#807467;font-size:14px}
.tag{display:inline-block;padding:5px 9px;border-radius:999px;background:#8061a4;color:#fff;font-size:10px;font-weight:850;letter-spacing:.04em}
.quiz-card{padding:28px}.question-head{display:flex;align-items:center;justify-content:space-between}.question-head>div{display:flex;align-items:center;gap:10px}.subject{padding:6px 11px;border-radius:999px;background:#dff1ea;color:#3f725f;font-size:12px;font-weight:800}.question-head small{color:#998d80}.progress{height:7px;margin:18px 0 28px;border-radius:999px;background:#eee7dd;overflow:hidden}.progress i{display:block;width:5%;height:100%;border-radius:inherit;background:linear-gradient(90deg,#8061a4,#e3a963);transition:width .25s}.topic{color:#9b7b56;font-size:12px;font-weight:750}.quiz-card h2{min-height:58px;margin:12px 0 24px;color:#354b46;font-size:25px;line-height:1.5}
.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px}.answers button{min-height:62px;padding:12px;border:1px solid #e5ded4;border-radius:14px;background:#fff;color:#40544f;font-weight:720;cursor:pointer}.answers button:hover{border-color:#aa8dc9;background:#faf6ff}.answers button.correct{border-color:#70ad91;background:#e8f7ef;color:#39715a}.answers button.wrong{border-color:#db9389;background:#fff0ee;color:#a95f56}.answers button:disabled{cursor:default}
.help{display:flex;gap:10px;margin-top:17px}.help button,.listen{padding:9px 12px;border:0;border-radius:11px;background:#f5ebd9;color:#8d6b43;font-size:12px;font-weight:750;cursor:pointer}.listen{background:#eee4fa;color:#735594}.hint-box{margin-top:14px;padding:13px 15px;border-radius:12px;background:#fff7de;color:#79623e;font-size:13px;line-height:1.6}.feedback{min-height:24px;margin-top:16px;font-size:14px;font-weight:750}.feedback.good{color:#3e8869}.feedback.bad{color:#b6685c}
.result-card{padding:34px 28px;text-align:center}.result-icon{color:#8a67ae;font-size:45px}.result-card h2{margin:10px 0 22px;color:#514066;font-size:28px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.metrics div{padding:16px 8px;border-radius:14px;background:#f7f2fb}.metrics b{display:block;color:#725493;font-size:24px}.metrics span{color:#8e8198;font-size:11px}.reward-message{display:inline-block;margin:16px 0 0;padding:9px 13px;border-radius:999px;background:#fff1c9;color:#8c642b;font-size:13px;font-weight:800}.result-card h3{margin:26px 0 12px;font-size:15px}.difficulty{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.difficulty button{min-width:44px;padding:10px;border:1px solid #ded1e8;border-radius:11px;background:#fff;color:#6c567f;font-weight:800;cursor:pointer}.difficulty button.selected{background:#8061a4;color:#fff}.save-status{min-height:22px;color:#84788c;font-size:12px}.home-button{display:inline-block;margin-top:8px;padding:12px 18px;border-radius:12px;background:#76559e;color:#fff;text-decoration:none;font-size:13px;font-weight:800}
@media(max-width:560px){.diagnostic-app{width:min(100% - 20px,760px);padding-top:12px}header{font-size:11px}.intro-card,.quiz-card,.result-card{border-radius:18px}.intro-card,.quiz-card{padding:20px 17px}.intro-card h1{font-size:22px}.quiz-card h2{font-size:20px}.answers{grid-template-columns:1fr}.answers button{min-height:56px;text-align:left}.metrics{gap:6px}.metrics b{font-size:19px}.help{flex-direction:column}.listen{min-height:44px}}