.learning-preview { padding: 22px; border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); transform: rotate(1deg); }
.learning-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.learning-top span { padding: 5px 9px; border-radius: 999px; color: var(--green); background: color-mix(in srgb, var(--green) 11%, var(--surface)); font-size: 10px; font-weight: 800; }
.course-card { display: flex; align-items: center; gap: 14px; margin: 20px 0; padding: 18px; border-radius: 16px; background: linear-gradient(135deg, color-mix(in srgb, var(--blue) 12%, var(--surface)), color-mix(in srgb, var(--purple) 9%, var(--surface))); }
.course-card > i { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; color: #fff; background: var(--blue); font-style: normal; }
.course-card small, .course-card strong { display: block; }
.course-card small { color: var(--muted); }
.progress-label { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; }
.progress-bar { height: 10px; margin: 8px 0 20px; overflow: hidden; border-radius: 99px; background: var(--surface-soft); }
.progress-bar i { display: block; width: 68%; height: 100%; background: linear-gradient(90deg, var(--orange), var(--blue)); }
.lesson-list { display: grid; gap: 9px; }
.lesson-list div { display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.lesson-list b, .lesson-list em { color: var(--blue); font-style: normal; }
.system-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.system-grid div { display: grid; place-items: center; min-height: 105px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface-soft); font-weight: 800; text-align: center; }
.education-process { grid-template-columns: repeat(4, 1fr); }
.related-section { padding-top: 28px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.related-card { display: grid; gap: 7px; padding: 25px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface-soft); transition: transform .2s ease, border-color .2s ease; }
.related-card:hover { transform: translateY(-3px); border-color: var(--orange); }
.related-card span, .related-card small { color: var(--orange); font-weight: 800; }
.related-card strong { font-size: 17px; }
@media (max-width: 980px) { .system-grid, .education-process { grid-template-columns: repeat(2, 1fr); } .related-grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .learning-preview { padding: 16px; transform: none; } .system-grid, .education-process { grid-template-columns: 1fr; } }