:root{--cream: #fbf6ec;--cream-2: #f4ecdd;--ink: #2b2b33;--ink-soft: #5a5a66;--indigo: #2f4d8a;--indigo-dark: #233a6b;--sakura: #e0604f;--sakura-soft: #f4a79a;--gold: #d9a441;--line: #e7ddca;--card: #ffffff;--shadow: 0 6px 24px rgba(43, 43, 51, .08);--shadow-lg: 0 16px 48px rgba(43, 43, 51, .14);--radius: 16px;--maxw: 1080px;--font: "Noto Sans", "Hiragino Kaku Gothic ProN", "Segoe UI", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--ink);background:var(--cream);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--indigo);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:50;background:#fbf6eceb;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.site-header .bar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--indigo-dark)}.logo:hover{text-decoration:none}.logo .jp{color:var(--sakura);font-weight:700}.logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--indigo),var(--indigo-dark));color:#fff;display:grid;place-items:center;font-size:1rem;font-weight:800}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:999px;font-weight:700;font-size:.95rem;cursor:pointer;border:1.5px solid transparent;transition:transform .08s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn-primary{background:var(--indigo);color:#fff}.btn-primary:hover{background:var(--indigo-dark)}.btn-buy{background:var(--sakura);color:#fff}.btn-buy:hover{background:#cf5343}.btn-ghost{background:transparent;color:var(--indigo);border-color:var(--line)}.btn-ghost:hover{background:#fff}.btn-zalo{background:#0068ff;color:#fff}.btn-zalo:hover{background:#0057d6}.btn-contact{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1.5px solid #0068ff;color:#0068ff;font-size:.85rem;font-weight:600;text-decoration:none;transition:background .15s,color .15s}.btn-contact:hover{background:#0068ff;color:#fff;text-decoration:none}.btn-lg{padding:14px 28px;font-size:1.05rem}.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none}.hero{border-radius:var(--radius);overflow:hidden;margin-top:28px;box-shadow:var(--shadow);border:1px solid var(--line)}.hero img{width:100%;height:auto}.section{padding:44px 0}.section-head{margin-bottom:24px}.section-head h2{font-size:1.6rem;margin:0 0 6px;color:var(--indigo-dark)}.section-head p{margin:0;color:var(--ink-soft)}.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}.deck-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .2s ease}.deck-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}.deck-card .thumb{position:relative;aspect-ratio:16 / 10;background:var(--cream-2);overflow:hidden}.deck-card .thumb img{width:100%;height:100%;object-fit:cover}.deck-card .badge{position:absolute;top:10px;left:10px;background:#233a6beb;color:#fff;font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:999px}.deck-card .badge.free{background:var(--gold)}.deck-card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}.deck-card .body h3{margin:0;font-size:1.08rem;color:var(--ink);line-height:1.35}.deck-card .meta{font-size:.82rem;color:var(--ink-soft);display:flex;gap:12px;flex-wrap:wrap}.deck-card .summary{font-size:.9rem;color:var(--ink-soft);flex:1}.deck-card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:6px}.price{font-weight:800;color:var(--sakura);font-size:1.15rem}.price.free{color:var(--gold)}.detail{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start;padding-top:32px}.detail .gallery{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}.detail .gallery img{width:100%;aspect-ratio:16/10;object-fit:cover}.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:8px}.thumbs img{border-radius:8px;aspect-ratio:1;object-fit:cover;border:1px solid var(--line)}.breadcrumb{font-size:.85rem;color:var(--ink-soft);margin:18px 0 0}.detail h1{font-size:1.9rem;margin:6px 0 10px;color:var(--indigo-dark);line-height:1.25}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 16px}.chip{background:var(--cream-2);border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:.8rem;color:var(--ink-soft);font-weight:600}.chip.level{background:#eaf0fb;color:var(--indigo);border-color:#d4e0f5}.buybox{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin:18px 0}.buybox .price-row{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}.buybox .price-row .big{font-size:2rem;font-weight:800;color:var(--sakura)}.buybox .price-row .big.free{color:var(--gold)}.buybox .actions{display:flex;flex-direction:column;gap:10px}.buybox .note{font-size:.82rem;color:var(--ink-soft);margin:12px 0 0}.samples{margin-top:14px}.samples table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.samples th{text-align:left;background:var(--cream-2);padding:10px 14px;font-size:.8rem;color:var(--ink-soft)}.samples td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}.samples td.jp{font-weight:700;color:var(--ink);font-size:1.05rem;white-space:nowrap}.prose{color:var(--ink-soft)}.prose h2{color:var(--indigo-dark);font-size:1.25rem;margin:28px 0 8px}.related{margin-top:28px}.related h2{color:var(--indigo-dark);font-size:1.1rem;margin:0 0 10px}.related-list{display:flex;flex-direction:column;gap:6px}.related-item{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-radius:var(--radius);border:1px solid var(--line);background:#fff;text-decoration:none;color:var(--ink);transition:border-color .15s,background .15s}.related-item:hover{border-color:var(--indigo);background:var(--cream-2);text-decoration:none}.related-title{font-size:.9rem;font-weight:500}.related-meta{font-size:.8rem;color:var(--ink-soft);white-space:nowrap;margin-left:12px}.flashcard-slider{margin-top:12px}.flashcard-viewport{max-width:360px;margin:0 auto;overflow:hidden;border-radius:14px;box-shadow:var(--shadow)}.flashcard-track{display:flex;transition:transform .3s ease}.anki-card{flex:0 0 100%;background:#fff;border:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column}.anki-card-head{display:flex;align-items:center;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--cream-2)}.anki-card-head .type{font-size:.72rem;font-weight:700;color:var(--indigo);text-transform:uppercase;letter-spacing:.03em}.anki-frame{width:100%;height:660px;border:0;background:#fff;display:block}.anki-show{margin:0;border-radius:0;background:var(--indigo);color:#fff;border:0;border-top:1px solid var(--line)}.anki-show:hover{background:var(--indigo-dark);transform:none}.slider-controls{display:flex;align-items:center;justify-content:center;gap:20px;margin-top:12px}.slider-btn{width:36px;height:36px;border-radius:50%;border:1.5px solid var(--line);background:#fff;color:var(--ink);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,border-color .15s;line-height:1}.slider-btn:hover{background:var(--cream-2);border-color:var(--indigo)}.slider-btn:disabled{opacity:.35;cursor:default}.slider-counter{font-size:.85rem;color:var(--ink-soft);min-width:48px;text-align:center}.result-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);text-align:center;max-width:560px;margin:40px auto}.result-box .icon{font-size:3rem}.result-box.ok .icon{color:#2e9e5b}.result-box.fail .icon{color:var(--sakura)}.result-box h1{font-size:1.5rem;margin:8px 0}.result-box .link-out{word-break:break-all;background:var(--cream-2);border:1px dashed var(--line);border-radius:10px;padding:12px;margin:14px 0;font-size:.9rem}.spinner{width:38px;height:38px;border:4px solid var(--line);border-top-color:var(--indigo);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto}@keyframes spin{to{transform:rotate(360deg)}}.site-footer{border-top:1px solid var(--line);margin-top:40px;padding:28px 0;background:var(--cream-2)}.site-footer .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;color:var(--ink-soft);font-size:.9rem}.site-footer a{color:var(--ink-soft)}.site-footer .small{font-size:.82rem;color:var(--ink-soft);margin-top:14px}.alert{padding:12px 16px;border-radius:10px;font-size:.9rem;margin:14px 0}.alert.warn{background:#fdf3e3;border:1px solid #f0d8a8;color:#8a5a16}@media (max-width: 860px){.detail{grid-template-columns:1fr;gap:22px}.detail h1{font-size:1.5rem}}@media (max-width: 520px){.site-footer .cols{flex-direction:column}.logo span.full{display:none}}