/* SELF STUDY */
.self-study-section{background:#fff}
.self-study-head{max-width:930px;margin-bottom:48px}.self-study-head h2{margin-bottom:28px}.self-study-head .lead{max-width:850px}
.system-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin:0 0 20px;padding:0 4px}.system-intro h3{margin:0;font-size:1.5rem}.system-intro p{max-width:640px;margin:0;color:var(--muted);font-size:.94rem}.system-intro strong{color:var(--ink)}
.system-switcher{border:1px solid var(--line);border-radius:var(--radius-xl);background:var(--bg);padding:22px;margin-bottom:70px;box-shadow:var(--shadow-sm)}
.exam-tabs{display:inline-flex;background:#eee7df;padding:5px;border-radius:999px;margin-bottom:20px}
.exam-tab{border:0;background:transparent;border-radius:999px;padding:10px 24px;font-weight:850;cursor:pointer;min-width:110px}
.exam-tab.active{background:var(--orange);color:#fff;box-shadow:0 7px 18px rgba(244,81,42,.2)}
.skills-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.skill-card{min-height:185px;padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line);display:grid;grid-template-columns:46px 1fr 20px;gap:14px;align-items:start;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.skill-card:hover{transform:translateY(-4px);border-color:rgba(244,81,42,.48);box-shadow:var(--shadow-sm)}
.skill-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--orange-soft);color:var(--orange);font-weight:950}
.skill-card small{display:block;font-size:.66rem;font-weight:900;letter-spacing:.1em;color:var(--orange);margin-bottom:2px}.skill-card strong{display:block;font-size:1.18rem;margin-bottom:8px}.skill-card em{display:block;font-style:normal;color:var(--muted);font-size:.82rem;line-height:1.55}.skill-card>b{color:var(--orange);font-size:1.25rem}
.learning-demo{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:stretch}
.demo-question,.demo-analysis{border:1px solid var(--line);border-radius:var(--radius-xl);background:var(--bg);padding:30px}
.demo-topline{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--muted);padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:22px}.demo-topline strong{color:var(--orange)}
.demo-question h3{font-size:1.5rem;margin-bottom:22px}.demo-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px}
.demo-options{list-style:none;padding:0;margin:0;display:grid;gap:8px}.demo-options li{display:flex;gap:10px;align-items:flex-start;padding:10px;border:1px solid transparent;border-radius:11px;font-size:.83rem}.demo-options li span{font-weight:900}.demo-options li.selected{background:#fff;border-color:rgba(244,81,42,.28)}.demo-options li.selected span{color:var(--orange)}
.demo-passage{font-size:.86rem;line-height:1.75;color:#5e5751;background:#fff;border-radius:14px;padding:18px;margin:0}
.demo-analysis{background:#fff}.demo-analysis h3{font-size:2rem;max-width:420px}.analysis-steps{list-style:none;padding:0;margin:22px 0;display:grid;gap:0}.analysis-steps li{display:grid;grid-template-columns:30px 1fr;gap:12px;position:relative;padding:8px 0}.analysis-steps li:not(:last-child)::after{content:"";position:absolute;left:14px;top:38px;bottom:-5px;width:1px;background:rgba(244,81,42,.25)}.analysis-steps li>span{width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--orange-soft);color:var(--orange);font-weight:900;font-size:.72rem}.analysis-steps strong{display:block;font-size:.9rem}.analysis-steps small{display:block;color:var(--muted);line-height:1.4;margin-top:2px}.demo-analysis blockquote{margin:24px 0 0;padding:18px 20px;border-radius:15px;background:var(--orange);color:#fff;font-weight:760;line-height:1.55}