.page-header[data-astro-cid-r6bjwg74]{background:linear-gradient(135deg,#06c,#004c99);color:#fff;padding:3rem 1.5rem;text-align:center}.container[data-astro-cid-r6bjwg74]{max-width:1200px;margin:0 auto}.page-title[data-astro-cid-r6bjwg74]{font-size:2rem;font-weight:700;margin:0 0 .5rem}.page-subtitle[data-astro-cid-r6bjwg74]{font-size:1rem;opacity:.9;margin:0}.content-wrapper[data-astro-cid-r6bjwg74]{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:300px 1fr;gap:2rem;padding:2rem 1.5rem}@media(max-width:1024px){.content-wrapper[data-astro-cid-r6bjwg74]{grid-template-columns:1fr}.sidebar[data-astro-cid-r6bjwg74]{position:static!important;max-height:none;border-right:none;border-bottom:1px solid var(--border-light);padding-bottom:1.5rem;margin-bottom:1rem}}.sidebar[data-astro-cid-r6bjwg74]{position:sticky;top:80px;height:fit-content;max-height:calc(100vh - 100px);overflow-y:auto;padding-right:1rem;border-right:1px solid var(--border-light)}.sidebar-title[data-astro-cid-r6bjwg74]{font-size:.875rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin:0 0 1rem;padding-left:.5rem}.sidebar-nav[data-astro-cid-r6bjwg74]{display:flex;flex-direction:column;gap:1rem}.chapter-group[data-astro-cid-r6bjwg74]{margin-bottom:.5rem}.chapter-title[data-astro-cid-r6bjwg74]{font-size:.8rem;font-weight:700;color:var(--primary);padding:.5rem;background:var(--primary-light);border-radius:6px;margin-bottom:.5rem}.section-list[data-astro-cid-r6bjwg74]{list-style:none;padding:0;margin:0}.section-list[data-astro-cid-r6bjwg74] li[data-astro-cid-r6bjwg74]{margin-bottom:2px}.section-link[data-astro-cid-r6bjwg74]{display:flex;align-items:flex-start;gap:.5rem;padding:.5rem;color:var(--text-muted);text-decoration:none;border-radius:6px;font-size:.85rem;line-height:1.4;transition:all .2s ease}.section-link[data-astro-cid-r6bjwg74]:hover{color:var(--primary);background:var(--bg-light)}.section-link[data-astro-cid-r6bjwg74].active{color:var(--primary);background:var(--primary-light);font-weight:600}.section-num[data-astro-cid-r6bjwg74]{flex-shrink:0;width:20px;height:20px;background:var(--border-light);color:var(--text-muted);font-size:.7rem;font-weight:600;border-radius:50%;display:flex;align-items:center;justify-content:center}.section-link[data-astro-cid-r6bjwg74].active .section-num[data-astro-cid-r6bjwg74]{background:var(--primary);color:#fff}.section-name[data-astro-cid-r6bjwg74]{flex:1}.main-content[data-astro-cid-r6bjwg74]{min-width:0}.tutorial-content[data-astro-cid-r6bjwg74]{background:#fff;border-radius:16px;box-shadow:0 4px 20px #0000000d;overflow:hidden}.breadcrumb[data-astro-cid-r6bjwg74]{padding:1rem 2rem;background:var(--bg-light);font-size:.875rem;color:var(--text-muted);border-bottom:1px solid var(--border-light)}.breadcrumb[data-astro-cid-r6bjwg74] a[data-astro-cid-r6bjwg74]{color:var(--primary);text-decoration:none}.breadcrumb[data-astro-cid-r6bjwg74] a[data-astro-cid-r6bjwg74]:hover{text-decoration:underline}.breadcrumb[data-astro-cid-r6bjwg74] .separator[data-astro-cid-r6bjwg74]{margin:0 .5rem;color:var(--border-light)}.section-header[data-astro-cid-r6bjwg74]{padding:2rem;border-bottom:1px solid var(--border-light);display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.section-number[data-astro-cid-r6bjwg74]{display:inline-block;background:var(--primary);color:#fff;font-size:.8rem;font-weight:600;padding:.25rem .75rem;border-radius:20px;margin:0}.section-header[data-astro-cid-r6bjwg74] h1[data-astro-cid-r6bjwg74]{font-size:1.75rem;font-weight:700;color:var(--text-dark);margin:0;line-height:1.3}.duration[data-astro-cid-r6bjwg74]{color:var(--text-muted);font-size:.9rem}.section-body[data-astro-cid-r6bjwg74]{padding:2rem}.placeholder-note[data-astro-cid-r6bjwg74]{display:flex;gap:1rem;padding:1.5rem;background:#fffbeb;border:1px solid #fcd34d;border-radius:12px;margin-top:1rem}.note-icon[data-astro-cid-r6bjwg74]{font-size:1.5rem;flex-shrink:0}.note-content[data-astro-cid-r6bjwg74] h3[data-astro-cid-r6bjwg74]{font-size:1rem;font-weight:600;color:#92400e;margin:0 0 .5rem}.note-content[data-astro-cid-r6bjwg74] p[data-astro-cid-r6bjwg74]{font-size:.9rem;color:#a16207;margin:0;line-height:1.6}.note-content[data-astro-cid-r6bjwg74] a[data-astro-cid-r6bjwg74]{color:#92400e;font-weight:600}.section-nav[data-astro-cid-r6bjwg74]{display:flex;justify-content:space-between;gap:1rem;padding:1.5rem;border-radius:0 0 16px 16px;margin-top:2rem}.nav-prev[data-astro-cid-r6bjwg74],.nav-next[data-astro-cid-r6bjwg74]{flex:1}.nav-next[data-astro-cid-r6bjwg74]{text-align:right}.nav-link[data-astro-cid-r6bjwg74]{display:inline-flex;flex-direction:column;gap:.25rem;padding:1rem 1.5rem;background:#e6f2ff;border-radius:10px;text-decoration:none;transition:all .2s ease;box-shadow:0 2px 8px #0000000d}.nav-link[data-astro-cid-r6bjwg74]:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.nav-direction[data-astro-cid-r6bjwg74]{font-size:.8rem;color:var(--primary);font-weight:600}.nav-title[data-astro-cid-r6bjwg74]{font-size:.9rem;color:var(--text-dark);font-weight:500}@media(max-width:640px){.section-nav[data-astro-cid-r6bjwg74]{flex-direction:column}.nav-next[data-astro-cid-r6bjwg74]{text-align:left}.nav-link[data-astro-cid-r6bjwg74]{width:100%}}