.hksi-article{--ink:#172b44;--muted:#516174;--gold:#b78a36;--line:#dce3e8;color:var(--ink);max-width:1120px;margin:auto;padding:34px 28px 70px;font-family:Arial,Helvetica,sans-serif;font-size:17px;line-height:1.75;overflow-wrap:break-word}.hksi-article *{box-sizing:border-box}.hksi-article h1,.hksi-article h2,.hksi-article h3{font-family:inherit;color:var(--ink);font-weight:700;line-height:1.25}.hksi-article h1{font-size:clamp(30px,4vw,47px);letter-spacing:-1px;max-width:950px;margin:16px 0 20px}.hksi-article h2{font-size:28px;margin:48px 0 18px;scroll-margin-top:100px}.hksi-article h3{font-size:21px;margin:0 0 12px;scroll-margin-top:100px}.hksi-article p{margin:0 0 16px}.hksi-article a{color:#176184;text-decoration:underline;text-underline-offset:3px}.hksi-article a:hover{color:#734f11}.hksi-article a:focus-visible,.hksi-article button:focus-visible,.hksi-article input:focus-visible,.hksi-article summary:focus-visible{outline:3px solid #b78a36;outline-offset:4px}.hksi-article .breadcrumbs{font-size:14px;display:flex;gap:9px;flex-wrap:wrap}.hksi-article .article-meta{font-size:14px;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:24px}.hksi-article .article-intro{max-width:850px;font-size:19px}.hksi-article .exam-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}.hksi-article .exam-facts div{padding:18px 22px;background:#f0f4f7;border-radius:10px}.hksi-article .exam-facts strong{display:block;font-size:26px}.hksi-article .scope-note{border-left:4px solid var(--gold);padding:20px 24px;background:#fff8e9;margin:24px 0;font-size:16px}.hksi-article .toc{border:1px solid var(--line);border-radius:12px;background:#f8fafb;padding:22px 28px;margin:28px 0}.hksi-article .toc h2{font-size:21px;margin:0 0 12px}.hksi-article .toc ol{margin:0;padding-left:22px;columns:2;column-gap:34px}.hksi-article .toc li{break-inside:avoid;margin-bottom:6px;font-size:15px}.hksi-article .study-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.hksi-article .study-tools input[type=search]{background:white;border:1px solid #8a99a6;border-radius:7px;padding:10px 12px;color:var(--ink);font:inherit;width:100%;min-width:0}.hksi-article .search-label{flex:1 1 280px;font-size:14px}.hksi-article button,.hksi-article .article-button{padding:11px 18px;background:#173650;border:1px solid #173650;border-radius:7px;color:white;cursor:pointer;font:600 15px Arial,sans-serif;text-decoration:none;line-height:1.4}.hksi-article .article-button:hover,.hksi-article button:hover{background:#254d6c;color:white}.hksi-article .progress-text{flex:1 1 100%;font-size:14px;margin:0;color:var(--muted)}.hksi-article .concept{border-bottom:1px solid var(--line);padding:27px 0}.hksi-article .concept .example{background:#f0f5f8;border-radius:8px;padding:14px 18px}.hksi-article .concept .trap{font-size:16px;color:#574318}.hksi-article .concept details{background:#f8fafb;border:1px solid var(--line);border-radius:8px;padding:12px 16px}.hksi-article summary{cursor:pointer;font-weight:600}.hksi-article details p{margin:12px 0 0}.hksi-article .learned-label{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--muted);margin-top:12px;cursor:pointer}.hksi-article input[type=checkbox]{width:18px;height:18px;accent-color:#1f6b63}.hksi-article .concept.is-learned h3:after{content:' ✓';color:#1f6b63}.hksi-article .article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.hksi-article .guide-card{display:block;padding:23px;border:1px solid var(--line);border-radius:12px;text-decoration:none;background:#fff}.hksi-article .guide-card strong{display:block;color:var(--ink);font-size:21px;margin:6px 0}.hksi-article .guide-card span{display:block;color:var(--muted);font-size:15px}.hksi-article .guide-card:hover{background:#f3f7fa;border-color:#8395a7}.hksi-article .table-scroll{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:10px}.hksi-article table{width:100%;border-collapse:collapse;margin:0;font-size:15px}.hksi-article th{text-align:left;font-weight:600}.hksi-article thead th{background:#173650;color:white}.hksi-article tbody th{color:var(--ink);background:white}.hksi-article th,.hksi-article td{padding:13px 16px;vertical-align:top;border:0;border-bottom:1px solid var(--line)}.hksi-article tr:nth-child(even) th,.hksi-article tr:nth-child(even) td{background:#f5f8fa}.hksi-article .table-note{font-size:14px;color:var(--muted)}.hksi-article .rate-value{font-size:22px;font-weight:700;white-space:nowrap}.hksi-article .history{border:1px solid var(--line);padding:15px 20px;border-radius:10px;margin:12px 0}.hksi-article .history table{font-size:14px}.hksi-article .faq{border-bottom:1px solid var(--line);padding:18px 0}.hksi-article .faq h3{font-size:20px}.hksi-article .article-cta{background:#edf3f7;border-radius:12px;padding:25px;margin:32px 0}.hksi-article .article-cta h2{margin:0 0 14px;font-size:24px}.hksi-article .article-cta-links{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.hksi-article .sources{font-size:15px}.hksi-article .sources li{margin-bottom:8px}.hksi-article .tip{padding:18px 0}.hksi-article .try-this{border-left:3px solid var(--gold);padding:14px 18px;background:#fff9ec}.hksi-article .no-results{padding:16px;color:var(--muted)}.hksi-guide-discovery{max-width:1100px;margin:22px auto;padding:18px 24px;border-left:4px solid #b78a36;background:#f0f5f8;font:16px/1.7 Arial,sans-serif;color:#173650}.hksi-guide-discovery a{color:#176184;text-decoration:underline}.hksi-article [hidden]{display:none!important}@media(max-width:650px){.hksi-article{padding:24px 18px 50px;font-size:16px}.hksi-article h2{font-size:25px}.hksi-article .article-intro{font-size:17px}.hksi-article .exam-facts{gap:7px}.hksi-article .exam-facts div{padding:12px 10px;font-size:13px}.hksi-article .exam-facts strong{font-size:23px}.hksi-article .toc{padding:20px}.hksi-article .toc ol{columns:1}.hksi-article .article-grid{grid-template-columns:1fr}.hksi-article th,.hksi-article td{padding:10px 12px}.hksi-article .scope-note{padding:17px}.hksi-article .study-tools button{flex:1 1 130px}}@media print{header.elementor-location-header,footer.elementor-location-footer,.hksi-article .study-tools,.hksi-article .learned-label,.hksi-article .article-cta,.hksi-article .breadcrumbs,hksi-support,.hksi-support-launcher{display:none!important}.hksi-article{max-width:none;padding:0;font-size:11pt}.hksi-article .concept{break-inside:avoid}.hksi-article details>*{display:block!important}.hksi-article [hidden]{display:block!important}.hksi-article h1{font-size:26pt}.hksi-article h2{font-size:20pt}}
.hksi-article .article-practice{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:18px 20px;margin:20px 0 28px;background:#f1f5f8;border-left:4px solid #b78a36;border-radius:0 8px 8px 0}.hksi-article .article-practice p{flex:1;min-width:200px;margin:0;font-size:15px}.hksi-article .article-practice .article-button{margin:0;max-width:100%;white-space:normal;text-align:center}@media(max-width:650px){.hksi-article .article-practice{padding:16px;gap:12px}.hksi-article .article-practice .article-button{width:100%}}
.hksi-public-article-page #content .ast-container{max-width:none;padding:0;display:block}.hksi-public-header{background:#142c45;color:white;padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;position:relative;z-index:1}.hksi-public-header img{width:230px;height:auto;display:block}.hksi-public-header nav{display:flex;gap:24px;flex-wrap:wrap}.hksi-public-header nav a{color:white;font:600 15px/1.4 Arial,sans-serif;text-decoration:none}.hksi-public-header nav a:hover{text-decoration:underline}.hksi-public-header a:focus-visible{outline:3px solid #edc77a;outline-offset:5px}@media(max-width:650px){.hksi-public-header{padding:18px;align-items:flex-start;flex-direction:column;gap:18px}.hksi-public-header img{width:205px}.hksi-public-header nav{gap:22px}.hksi-public-header nav a{font-size:14px}}@media print{.hksi-public-header{display:none!important}}

.article-languages{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 22px;font-size:13px}.article-languages a{border:1px solid #ccd8e1;border-radius:6px;padding:7px 12px;text-decoration:none}.article-languages [aria-current=page]{background:#142c45;color:white}.hksi-chinese-article .hksi-article{line-height:1.95}.hksi-chinese-article .hksi-article h1{line-height:1.35;letter-spacing:0}.hksi-chinese-article .hksi-article h2{line-height:1.5}.article-site-footer{text-align:center;padding:36px 20px;border-top:1px solid #dce5eb}.article-site-footer a{color:#245773}.hksi-article .toc ol{padding-left:1.5em}@media(max-width:600px){.hksi-chinese-article .hksi-article h1{font-size:30px}.hksi-article .table-scroll{max-width:100%;overflow-x:auto}}

.bonus-lesson{border-top:1px solid #dce5eb;padding-top:28px;margin-top:38px}.bonus-worksheet{display:grid;gap:8px;margin:24px 0 12px}.bonus-lesson textarea{font:inherit;line-height:1.6;width:100%;max-width:100%;box-sizing:border-box;padding:14px;border:1px solid #c7d5df;border-radius:8px;background:#fff;resize:vertical}.lesson-back{display:block;margin-top:16px;font-size:13px}@media print{.hksi-site-header,.article-languages,.study-tools,.lesson-back,footer,.hksi-support-widget{display:none!important}.bonus-lesson{break-before:page}.bonus-lesson textarea{min-height:140px;border-color:#777}.bonus-lesson .learned-label{display:none}.hksi-article{max-width:none;padding:0}}

.printed-course-note{display:none}@media print{.printed-course-note{display:block;white-space:pre-wrap;border:1px solid #888;padding:14px;min-height:100px;overflow-wrap:anywhere}.bonus-lesson textarea:has(+.printed-course-note){display:none}}

.article-meta time{white-space:nowrap;display:inline-block}