:root{--bg: #f4efe3;--surface: #fffaf0;--surface-alt: #ece2cf;--ink: #1d1a15;--ink-soft: #6e6558;--muted: #857a68;--brand: #1a5a3c;--brand-dark: #123f29;--green-soft: #dde7dd;--accent: #b85c38;--clay: #b85c38;--gold: #c49a4a;--line: #d8cbb8;--max: 720px;--radius-sm: 6px;--radius: 10px;--radius-lg: 16px;--s1: .25rem;--s2: .5rem;--s3: .75rem;--s4: 1rem;--s5: 1.5rem;--s6: 2rem;--s7: 3rem;--s8: 4rem;--s9: 6rem;--section: clamp(2.5rem, 6vw, 4.5rem);--step--1: clamp(.82rem, .8rem + .1vw, .9rem);--step-1: clamp(1.15rem, 1.05rem + .5vw, 1.35rem);--step-2: clamp(1.4rem, 1.2rem + 1vw, 1.8rem);--step-3: clamp(1.9rem, 1.5rem + 2vw, 2.6rem);--step-4: clamp(2.4rem, 1.8rem + 3vw, 3.4rem);--font-serif: Georgia, "Times New Roman", "Noto Serif TC", serif;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", Roboto, Helvetica, Arial, sans-serif;--font-mono: ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);font-size:18px;line-height:1.7}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.container{max-width:var(--max);margin:0 auto;padding:0 20px}.wide{max-width:980px}.site-header{border-bottom:1px solid var(--line);background:var(--surface)}.site-header .bar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:980px;margin:0 auto}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--ink)}.brand img{width:30px;height:30px}.nav{display:flex;gap:18px;align-items:center;font-size:.95rem}.nav a{color:var(--ink-soft);font-weight:600}.lang-pill{border:1px solid var(--line);border-radius:999px;padding:3px 12px;font-size:.85rem;color:var(--brand)!important}h1,h2,h3{font-family:var(--font-serif);line-height:1.25;color:var(--ink)}h1{font-size:2.1rem;margin:0 0 .4em}h2{font-size:1.5rem;margin:1.8em 0 .5em}h3{font-size:1.2rem;margin:1.4em 0 .4em}p{margin:0 0 1.1em}ul,ol{margin:0 0 1.1em;padding-left:1.4em}li{margin:.3em 0}blockquote{border-left:3px solid var(--brand);margin:1.2em 0;padding:.4em 1em;color:var(--ink-soft);background:#f3f6f2;border-radius:0 8px 8px 0}code{background:#eef1ec;padding:.1em .4em;border-radius:5px;font-size:.92em}table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.95rem}th,td{border:1px solid var(--line);padding:8px 10px;text-align:left}th{background:#f3f6f2}hr{border:none;border-top:1px solid var(--line);margin:2em 0}.hero{padding:56px 0 28px;text-align:center}.hero h1{font-size:2.5rem}.hero p{font-size:1.15rem;color:var(--ink-soft);max-width:560px;margin:.6em auto 0}.meta{color:var(--ink-soft);font-size:.9rem;margin:0 0 1.5em}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;font-weight:700;color:var(--brand)}.card-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin:24px 0}.card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:transform .12s ease,box-shadow .12s ease}.card.has-thumb{padding:0;overflow:hidden}.card:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0f6b3d14;text-decoration:none}.card-thumb{display:block;width:100%;aspect-ratio:2 / 1;object-fit:cover;background:var(--line)}.card.has-thumb .card-body{padding:18px 20px 20px}.card h3{margin:.2em 0 .3em;font-size:1.15rem}.card p{color:var(--ink-soft);font-size:.95rem;margin:0}.cta{position:relative;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--radius-lg);padding:24px 26px 26px;margin:var(--section) 0;text-align:left;box-shadow:0 14px 34px #1d1a150f}.cta__kicker{display:block;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--clay);margin-bottom:8px}.cta h3{color:var(--ink);margin:0 0 .4em}.cta p{color:var(--ink-soft);margin:0 0 1.2em}.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:800;padding:12px 24px;border-radius:999px}.btn:hover{background:var(--brand-dark);text-decoration:none}.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:0 0 28px;font-size:.95rem}.toc strong{display:block;margin-bottom:.5em;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft)}.toc ol{margin:0}.site-footer{border-top:1px solid var(--line);background:var(--surface);margin-top:60px;padding:32px 0;font-size:.9rem;color:var(--ink-soft)}.site-footer .cols{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;max-width:980px;margin:0 auto;padding:0 20px}.site-footer a{color:var(--ink-soft)}.prose{padding:8px 0 20px}.prose p a,.prose li a{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}.lead{display:block;width:100%;height:auto;aspect-ratio:1600 / 560;object-fit:cover;border-radius:var(--radius-lg);margin:.25rem 0 1.75rem;background:var(--line);box-shadow:0 14px 34px #1d1a1514}@media(max-width:600px){body{font-size:17px}.hero h1{font-size:2rem}h1{font-size:1.8rem}}.eyebrow{font-family:var(--font-mono)}a:focus-visible,button:focus-visible,.btn:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--radius-sm)}.btn-ghost{display:inline-block;background:transparent;color:var(--brand-dark);border:1px solid var(--brand);font-weight:700;padding:11px 22px;border-radius:999px;font-size:.95rem}.btn-ghost:hover{background:var(--green-soft);text-decoration:none}.tag{display:inline-block;font-family:var(--font-mono);font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--brand-dark);background:var(--green-soft);border-radius:999px;padding:2px 10px}.badge{display:inline-block;background:var(--brand);color:#fff;font-family:var(--font-mono);font-size:.68rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;padding:3px 10px;border-radius:999px}.rating{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-weight:700;color:var(--ink)}.stars{color:var(--gold);letter-spacing:1px}.study-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding-top:var(--section);padding-bottom:calc(var(--section) - .5rem)}.study-hero__intro .eyebrow{color:var(--clay)}.study-hero__intro h1{font-size:var(--step-4);line-height:1.1;margin:.2em 0 .35em}.study-hero__intro p{font-size:1.15rem;color:var(--ink-soft);max-width:46ch;margin:0}.study-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.5rem}.study-board{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--clay);border-radius:var(--radius-lg);padding:16px 22px 22px;box-shadow:0 18px 40px #1d1a1512}.study-board__head{display:flex;align-items:center;justify-content:space-between;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:14px}.study-board__head .sb-mark{color:var(--clay);letter-spacing:.2em}.study-row{margin:13px 0}.study-row:last-child{margin-bottom:0}.study-label{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:7px}.pos-row{display:flex;gap:6px;flex-wrap:wrap}.pos{font-family:var(--font-mono);font-size:.78rem;font-weight:700;color:var(--ink-soft);background:var(--surface-alt);border-radius:6px;padding:4px 9px}.pos.is-hero{background:var(--brand);color:#fff}.range-matrix{display:grid;grid-template-columns:14px repeat(13,1fr);gap:2px;max-width:300px;align-items:center}.range-matrix .rm-col,.range-matrix .rm-row{font-family:var(--font-mono);font-size:9px;font-weight:600;line-height:1;color:var(--muted);text-align:center}.range-matrix i{aspect-ratio:1;border-radius:2px;background:var(--surface-alt)}.range-matrix i.on{background:var(--brand)}.range-matrix i.mid{background:var(--gold)}.study-notes{display:flex;flex-wrap:wrap;gap:8px}.note-mono{font-family:var(--font-mono);font-size:.82rem;color:var(--ink);background:var(--green-soft);border-radius:8px;padding:7px 11px}.note-mono b{color:var(--brand-dark);font-weight:700}.street{display:flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:.76rem;color:var(--ink-soft);flex-wrap:wrap}.street b{color:var(--brand)}.street .sep{color:var(--muted)}.section-head{display:flex;align-items:baseline;gap:12px;margin:var(--section) 0 4px;border-bottom:1px solid var(--line);padding-bottom:8px}.section-head h2{margin:0}.section-head .section-sub{font-family:var(--font-mono);font-size:.72rem;color:var(--muted);letter-spacing:.04em;margin-left:auto}.lesson-featured{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:18px 0 0}.card .tag{margin-bottom:9px}.card__more{display:inline-block;margin-top:11px;font-weight:700;color:var(--brand);font-size:.9rem;font-family:var(--font-sans)}.card--featured .card-thumb{aspect-ratio:16 / 7}.card--featured .card-body{padding:20px 22px 22px}.card--featured h3{font-size:1.4rem}@media(max-width:820px){.study-hero{grid-template-columns:1fr;gap:22px;padding-top:var(--s6);padding-bottom:var(--s2)}.study-hero__intro h1{font-size:2rem}.lesson-featured{grid-template-columns:1fr}}