html{scroll-behavior:smooth}body{color:#18212b;background:#fff;margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.75}a{color:inherit}.container[data-astro-cid-ridia5cc]{width:min(1180px,100% - 32px);margin:0 auto}.hero[data-astro-cid-ridia5cc]{background:linear-gradient(#f5f8fb 0%,#fff 100%);border-bottom:1px solid #e7ebef;padding:58px 0 48px}.breadcrumb[data-astro-cid-ridia5cc]{color:#697586;flex-wrap:wrap;gap:8px;margin-bottom:24px;font-size:14px;display:flex}.breadcrumb[data-astro-cid-ridia5cc] a[data-astro-cid-ridia5cc]{text-decoration:none}.category[data-astro-cid-ridia5cc]{color:#8b1e1e;letter-spacing:.08em;margin-bottom:12px;font-size:12px;font-weight:900;display:inline-block}h1[data-astro-cid-ridia5cc]{letter-spacing:-.035em;max-width:1000px;margin:0;font-size:clamp(36px,5vw,58px);line-height:1.08}.hero-text[data-astro-cid-ridia5cc]{color:#566170;max-width:850px;margin:24px 0 18px;font-size:19px}.meta[data-astro-cid-ridia5cc]{color:#697586;flex-wrap:wrap;gap:10px;font-size:14px;display:flex}.featured-section[data-astro-cid-ridia5cc]{padding:34px 0 10px}figure[data-astro-cid-ridia5cc]{margin:0}figure[data-astro-cid-ridia5cc] img[data-astro-cid-ridia5cc]{border-radius:18px;width:100%;height:auto;display:block;box-shadow:0 16px 45px #0f172a17}figcaption[data-astro-cid-ridia5cc]{color:#697586;text-align:center;margin-top:10px;font-size:13px}.content-section[data-astro-cid-ridia5cc]{padding:28px 0 80px}.article-layout[data-astro-cid-ridia5cc]{grid-template-columns:minmax(0,1fr) 280px;align-items:start;gap:52px;display:grid}.article[data-astro-cid-ridia5cc]{min-width:0}.article[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{letter-spacing:-.02em;margin:52px 0 18px;scroll-margin-top:90px;font-size:31px;line-height:1.2}.article[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin-top:30px;font-size:21px;line-height:1.35}.article[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{color:#374151;font-size:17px}.quick-box[data-astro-cid-ridia5cc]{background:#f6f8fa;border:1px solid #dfe5eb;border-radius:15px;margin:25px 0;padding:24px 26px}.quick-box[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin-bottom:5px}.four-stage[data-astro-cid-ridia5cc]{grid-template-columns:repeat(4,1fr);gap:13px;margin:28px 0;display:grid}.four-stage[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:14px;padding:20px}.four-stage[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#8b1e1e;font-size:12px;font-weight:900;display:block}.four-stage[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc]{margin-top:7px;display:block}.four-stage[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:6px 0 0;font-size:14px}.toc[data-astro-cid-ridia5cc]{border:1px solid #e2e7ec;border-radius:16px;margin:32px 0;padding:24px}.toc[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{margin:0 0 14px;font-size:21px}.toc[data-astro-cid-ridia5cc] ol[data-astro-cid-ridia5cc]{margin:0;padding-left:22px}.toc[data-astro-cid-ridia5cc] li[data-astro-cid-ridia5cc]{margin:7px 0}.toc[data-astro-cid-ridia5cc] a[data-astro-cid-ridia5cc]{color:#8b1e1e;text-decoration:none}.benefit-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(2,1fr);gap:15px;margin:28px 0;display:grid}.benefit-grid[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:15px;padding:23px}.benefit-grid[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin:0}.benefit-grid[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin-bottom:0;font-size:15px}.large-list[data-astro-cid-ridia5cc]{padding-left:24px}.large-list[data-astro-cid-ridia5cc] li[data-astro-cid-ridia5cc]{margin:9px 0;font-size:16px}.tip-box[data-astro-cid-ridia5cc]{background:#f7f8fa;border-left:4px solid #8b1e1e;border-radius:10px;margin:28px 0;padding:22px 24px}.tip-box[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin-bottom:5px}.process[data-astro-cid-ridia5cc]{grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:12px;margin:30px 0;display:grid}.process[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]:not(.arrow){text-align:center;border:1px solid #e1e6eb;border-radius:14px;padding:21px}.process[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#8b1e1e;font-size:11px;font-weight:900;display:block}.process[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc]{margin-top:7px;display:block}.arrow[data-astro-cid-ridia5cc]{color:#8b1e1e;font-size:24px}.topic-table[data-astro-cid-ridia5cc]{border:1px solid #dfe5ea;border-radius:15px;margin:28px 0;overflow:hidden}.topic-head[data-astro-cid-ridia5cc],.topic-table[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]:not(.topic-head){grid-template-columns:120px minmax(160px,1fr) minmax(190px,1fr);align-items:center;gap:12px;padding:15px 17px;display:grid}.topic-head[data-astro-cid-ridia5cc]{color:#fff;background:#18212b;font-weight:800}.topic-table[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]:not(.topic-head){border-top:1px solid #e6eaee}.topic-table[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]:nth-child(2n){background:#f8fafb}.answer-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(4,1fr);gap:13px;margin:28px 0;display:grid}.answer-grid[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:14px;padding:21px}.answer-grid[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#fff;background:#8b1e1e;border-radius:50%;justify-content:center;align-items:center;width:34px;height:34px;margin-bottom:12px;font-size:12px;font-weight:900;display:flex}.answer-grid[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc]{display:block}.answer-grid[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:7px 0 0;font-size:14px}.answer-structure[data-astro-cid-ridia5cc]{grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0;display:grid}.answer-structure[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{background:#f5f7f9;border-radius:12px;padding:19px}.answer-structure[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc],.answer-structure[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{display:block}.answer-structure[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#697586;margin-top:5px;font-size:13px}.revision-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(4,1fr);gap:13px;margin:28px 0;display:grid}.revision-grid[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:14px;padding:21px}.revision-grid[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc]{display:block}.revision-grid[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:7px 0 0;font-size:14px}.days-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(4,1fr);gap:13px;margin:28px 0;display:grid}.days-grid[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:15px;padding:22px}.days-grid[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#8b1e1e;font-size:11px;font-weight:900}.days-grid[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin:8px 0}.days-grid[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:0;font-size:14px}.mistake-list[data-astro-cid-ridia5cc]{gap:12px;margin:28px 0;display:grid}.mistake-list[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:13px;padding:20px 22px}.mistake-list[data-astro-cid-ridia5cc] strong[data-astro-cid-ridia5cc]{font-size:17px;display:block}.mistake-list[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:5px 0 0;font-size:15px}.book-card[data-astro-cid-ridia5cc]{background:#f7f8fa;border:1px solid #dfe5ea;border-radius:20px;grid-template-columns:minmax(0,1fr) 200px;align-items:center;gap:35px;margin:48px 0;padding:32px;display:grid}.book-card[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{margin-top:0}.book-card[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin-top:18px}.book-image[data-astro-cid-ridia5cc] img[data-astro-cid-ridia5cc]{border-radius:8px;width:100%;height:auto;display:block}.book-card[data-astro-cid-ridia5cc] ul[data-astro-cid-ridia5cc]{padding-left:21px}.price[data-astro-cid-ridia5cc]{margin:16px 0;font-size:28px;font-weight:900}.tag[data-astro-cid-ridia5cc]{color:#8b1e1e;letter-spacing:.08em;font-size:11px;font-weight:900;display:inline-block}.btn[data-astro-cid-ridia5cc]{border-radius:10px;justify-content:center;align-items:center;padding:13px 20px;font-weight:800;text-decoration:none;display:inline-flex}.btn-primary[data-astro-cid-ridia5cc]{color:#fff;background:#8b1e1e}.btn-secondary[data-astro-cid-ridia5cc]{color:#fff;background:#18212b}.btn-outline[data-astro-cid-ridia5cc]{color:#8b1e1e;border:1px solid #8b1e1e}.btn-light[data-astro-cid-ridia5cc]{color:#18212b;background:#fff}.secondary-card[data-astro-cid-ridia5cc]{background:#fff;border:1px solid #dfe5ea;border-radius:20px;margin:42px 0;padding:31px}.secondary-card[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{margin-top:5px}.mock-card[data-astro-cid-ridia5cc]{color:#fff;background:#18212b;border-radius:20px;margin:42px 0;padding:32px}.mock-card[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{margin-top:5px}.mock-card[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{color:#d5dbe1}.related-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(2,1fr);gap:15px;display:grid}.related-card[data-astro-cid-ridia5cc]{border:1px solid #e1e6eb;border-radius:15px;padding:20px;text-decoration:none;display:block}.related-card[data-astro-cid-ridia5cc] span[data-astro-cid-ridia5cc]{color:#8b1e1e;font-size:11px;font-weight:900}.related-card[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin:8px 0;font-size:18px}.related-card[data-astro-cid-ridia5cc] p[data-astro-cid-ridia5cc]{margin:0;font-size:14px}.faq[data-astro-cid-ridia5cc]{margin-top:20px}details[data-astro-cid-ridia5cc]{border-bottom:1px solid #e1e6eb;padding:18px 0}summary[data-astro-cid-ridia5cc]{cursor:pointer;font-weight:800}.final-cta[data-astro-cid-ridia5cc]{text-align:center;background:#f5f7f9;border-radius:20px;margin-top:55px;padding:38px}.final-cta[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{margin-top:7px}.final-buttons[data-astro-cid-ridia5cc]{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:24px;display:flex}.sidebar[data-astro-cid-ridia5cc]{position:sticky;top:90px}.sidebar-card[data-astro-cid-ridia5cc]{background:#fff;border:1px solid #e1e6eb;border-radius:15px;margin-bottom:15px;padding:21px}.sidebar-card[data-astro-cid-ridia5cc] h3[data-astro-cid-ridia5cc]{margin-top:5px}.sidebar-card[data-astro-cid-ridia5cc]>a[data-astro-cid-ridia5cc]:not(.small-btn){color:#536070;padding:7px 0;font-size:14px;text-decoration:none;display:block}.book-sidebar[data-astro-cid-ridia5cc]{background:#f7f8fa}.sidebar-price[data-astro-cid-ridia5cc]{margin:9px 0;font-size:24px;font-weight:900}.book-sidebar[data-astro-cid-ridia5cc] img[data-astro-cid-ridia5cc]{border-radius:7px;width:150px;height:auto;margin:12px 0 17px;display:block}.small-btn[data-astro-cid-ridia5cc]{color:#fff;background:#8b1e1e;border-radius:8px;padding:9px 13px;font-size:13px;font-weight:800;text-decoration:none;display:inline-block}@media (width<=950px){.article-layout[data-astro-cid-ridia5cc]{grid-template-columns:1fr}.sidebar[data-astro-cid-ridia5cc]{position:static}.four-stage[data-astro-cid-ridia5cc],.answer-grid[data-astro-cid-ridia5cc],.answer-structure[data-astro-cid-ridia5cc],.revision-grid[data-astro-cid-ridia5cc],.days-grid[data-astro-cid-ridia5cc]{grid-template-columns:repeat(2,1fr)}}@media (width<=700px){.hero[data-astro-cid-ridia5cc]{padding:38px 0 32px}h1[data-astro-cid-ridia5cc]{font-size:35px}.hero-text[data-astro-cid-ridia5cc]{font-size:17px}.four-stage[data-astro-cid-ridia5cc],.benefit-grid[data-astro-cid-ridia5cc],.answer-grid[data-astro-cid-ridia5cc],.answer-structure[data-astro-cid-ridia5cc],.revision-grid[data-astro-cid-ridia5cc],.days-grid[data-astro-cid-ridia5cc],.related-grid[data-astro-cid-ridia5cc],.process[data-astro-cid-ridia5cc]{grid-template-columns:1fr}.arrow[data-astro-cid-ridia5cc]{text-align:center;transform:rotate(90deg)}.topic-table[data-astro-cid-ridia5cc]{overflow-x:auto}.topic-head[data-astro-cid-ridia5cc],.topic-table[data-astro-cid-ridia5cc]>div[data-astro-cid-ridia5cc]:not(.topic-head){min-width:620px}.book-card[data-astro-cid-ridia5cc]{grid-template-columns:1fr}.book-image[data-astro-cid-ridia5cc] img[data-astro-cid-ridia5cc]{max-width:190px}.article[data-astro-cid-ridia5cc] h2[data-astro-cid-ridia5cc]{font-size:27px}.final-cta[data-astro-cid-ridia5cc]{padding:27px 20px}.final-buttons[data-astro-cid-ridia5cc]{flex-direction:column}.final-buttons[data-astro-cid-ridia5cc] .btn[data-astro-cid-ridia5cc]{box-sizing:border-box;width:100%}}