.study-home{background:#f5f5ef}.study-shell{max-width:1180px!important}.study-intro{padding:28px 0 32px}.study-intro h1{font-size:clamp(36px,5vw,54px);letter-spacing:-1px;margin:10px 0 15px}.study-lead{color:var(--muted);font-size:18px;margin:0}.study-section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:8px 0 22px}.study-section-heading h2{font-size:21px;margin:0}.study-section-heading a{font-size:14px}.exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.exam-card{display:flex;flex-direction:column;min-height:240px;border:1px solid #d5dfd7;border-radius:17px;background:#fff;padding:28px;text-decoration:none;color:var(--ink);transition:transform .18s,box-shadow .18s}.exam-card:hover{transform:translateY(-3px);box-shadow:0 10px 25px #18342f0b;border-color:#92ad9a}.exam-card:focus-visible,.practice-card:focus-visible{outline:3px solid #286958;outline-offset:4px}.exam-ielts{background:#e9f1e8;border-color:#c8dbcb}.exam-code{font-size:13px;font-weight:700;letter-spacing:1.4px;color:#577768}.exam-card h3{font-size:31px;margin:20px 0 7px}.exam-card p{color:var(--muted);font-size:14px;margin:0 0 28px}.exam-enter{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:14px;color:var(--green);font-weight:600}.practice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.practice-card{padding:30px;border:1px solid var(--line);border-radius:16px;background:#fff;display:flex;flex-direction:column;text-decoration:none;color:var(--ink);min-height:225px}.practice-card h2{font-size:29px;margin:17px 0 12px}.practice-card p{color:var(--muted);margin:0 0 27px}.study-footer{margin:42px 0 0;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.teacher-tools{margin-top:32px}.teacher-tools h2{font-size:21px}.exam-empty{max-width:740px}.exam-empty p{color:var(--muted)}@media(max-width:850px){.exam-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.study-intro{padding:14px 0 26px}.study-lead{font-size:16px}.exam-grid,.practice-grid{grid-template-columns:1fr}.exam-card{min-height:205px;padding:24px}.exam-card h3{margin-top:14px}.study-section-heading{align-items:start}.study-section-heading a{font-size:13px}.practice-card{padding:24px}}

.shared-practice{margin:0 0 32px}.spelling-home-card{display:flex;align-items:center;justify-content:space-between;gap:20px 32px;padding:24px 28px;border:1px solid #bfd3c5;border-radius:17px;background:#e9f1e8;color:var(--ink);text-decoration:none}.spelling-home-card h2{font-size:27px;margin:8px 0}.spelling-home-card p{font-size:15px;color:var(--muted);margin:0;line-height:1.8}.spelling-home-enter{flex-shrink:0;display:flex;gap:24px;align-items:center;padding:12px 19px;border-radius:9px;background:var(--green);color:#fff;font-weight:600}.spelling-home-card:focus-visible{outline:3px solid var(--green);outline-offset:4px}.spelling-home-card:hover{border-color:#769c83;box-shadow:0 6px 20px #18342f0a}@media(max-width:560px){.spelling-home-card{align-items:stretch;flex-direction:column;padding:22px}.spelling-home-card h2{font-size:25px}.spelling-home-enter{align-self:flex-start}.shared-practice{margin-bottom:26px}}

/* 首页考试分组 */
.exam-group{margin:0 0 30px}
.exam-group-title{font-size:18px;font-weight:600;color:#41544c;margin:0 0 14px;letter-spacing:.02em}
@media(max-width:560px){.exam-group{margin-bottom:24px}.exam-group-title{font-size:16px;margin-bottom:10px}}