:root{--bg: #ffffff;--text: #1f2937;--muted: #6b7280;--line: #e5e7eb;--primary: #0f766e;--primary-light: #ecfdf5;--max: 1100px;--radius: 14px}*{box-sizing:border-box}html{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}body{margin:0;line-height:1.8}a{color:inherit;text-decoration:none}.container{width:min(100% - 32px,var(--max));margin:0 auto}.site-header,.site-footer{background:#fff}.site-header{border-bottom:1px solid var(--line)}.site-footer{border-top:1px solid var(--line);margin-top:64px;padding:24px 0}.header-inner,.footer-nav,.global-nav,.hero-links{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.header-inner{justify-content:space-between;padding:18px 0}.logo{font-weight:700;font-size:1.1rem}.hero{padding:72px 0 40px}.eyebrow{color:var(--primary);font-weight:700}h1{font-size:clamp(2rem,5vw,3.25rem);line-height:1.2;margin:0 0 16px}h2{font-size:1.6rem;margin:0 0 16px}.lead{font-size:1.1rem;color:var(--muted);max-width:720px}.section{padding:48px 0}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.card{display:block;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.button{display:inline-block;padding:12px 18px;border-radius:999px;background:var(--primary);color:#fff;font-weight:700}.button-sub{background:var(--primary-light);color:var(--primary)}.list-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.word-card{padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.word-main{margin:0 0 8px;font-size:2rem;font-weight:700;line-height:1.3}.word-pinyin{margin:0 0 10px;color:var(--primary);font-weight:600}.word-meaning{margin:0 0 14px;color:var(--text)}.word-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.badge{display:inline-block;padding:4px 10px;border-radius:999px;background:var(--primary-light);color:var(--primary);font-size:.85rem;font-weight:700}.example-box{padding-top:14px;border-top:1px solid var(--line)}.example-cn{margin:0 0 6px}.example-ja{margin:0;color:var(--muted);font-size:.95rem}.section-soft{background:#f8fafc}.info-box{margin-top:24px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.info-box-title{margin:0 0 10px;font-weight:700;color:var(--primary)}.content-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.content-card{padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.tone-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:24px}.tone-card{padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.tone-number{margin:0 0 8px;font-weight:700;color:var(--primary)}.tone-shape{margin:0 0 10px;font-weight:600}.tone-example{margin:0;font-size:1.5rem;font-weight:700}.step-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.step-card{padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.step-number{margin:0 0 8px;color:var(--primary);font-weight:700}.step-card h3{margin:0 0 10px;font-size:1.1rem}.step-card p{margin:0}.policy-block{padding:20px 0;border-top:1px solid var(--line)}.policy-block:first-of-type{border-top:0}.policy-block h2{margin-bottom:10px;font-size:1.2rem}.policy-block p{margin:0}.category-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.category-link{display:inline-block;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;font-weight:700}.section-group{padding-top:16px}.section-heading-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}.section-count{margin:0;color:var(--muted);font-weight:700}.footer-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;padding:32px 0 20px}.footer-logo{margin:0 0 10px;font-size:1.1rem;font-weight:700}.footer-text{margin:0;color:var(--muted);max-width:540px}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(160px,1fr));gap:24px}.footer-col{display:flex;flex-direction:column;gap:10px}.footer-heading{margin:0 0 4px;font-weight:700}.footer-bottom{padding:16px 0 28px;border-top:1px solid var(--line)}.footer-bottom p{margin:0;color:var(--muted)}@media(max-width:767px){.footer-wrap,.footer-links{grid-template-columns:1fr}}.highlight-panel{display:grid;grid-template-columns:1.5fr auto;gap:24px;align-items:center;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.highlight-label{margin:0 0 8px;color:var(--primary);font-weight:700}.highlight-title{margin:0 0 12px;font-size:clamp(1.35rem,3vw,2rem);line-height:1.4}.highlight-text{margin:0;color:var(--muted)}.highlight-actions{display:flex;gap:12px;flex-wrap:wrap}.content-card-post h3{margin:0 0 10px}.post-label{margin:0 0 8px;color:var(--primary);font-weight:700;font-size:.9rem}.text-link{display:inline-block;margin-top:12px;color:var(--primary);font-weight:700}@media(max-width:767px){.highlight-panel{grid-template-columns:1fr}}.search-box{margin-top:24px;margin-bottom:20px}.search-label{display:block;margin-bottom:8px;font-weight:700}.search-input{width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:#fff;font:inherit}.search-input:focus{outline:2px solid rgba(15,118,110,.18);border-color:var(--primary)}.searchable-card[style*="display: none"]{display:none!important}.study-card{padding:22px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,#fff,#fcfefd);box-shadow:0 10px 24px #0f172a0a}.study-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.study-main{display:grid;gap:6px}.study-label{margin:0;font-size:.8rem;font-weight:700;color:var(--muted);letter-spacing:.04em}.word-main{margin:0 0 10px;font-size:clamp(2rem,4vw,2.6rem);font-weight:700;line-height:1.25;color:#111827}.word-pinyin{margin:0 0 12px;color:var(--primary);font-weight:700;font-size:1.08rem}.word-meaning{margin:0 0 14px;color:var(--text);font-size:1rem;font-weight:500}.word-meta{display:flex;gap:8px;flex-wrap:wrap}.badge{display:inline-block;padding:5px 10px;border-radius:999px;background:var(--primary-light);color:var(--primary);font-size:.82rem;font-weight:700}.example-box{margin-top:16px;padding:16px;border-top:1px solid var(--line);background:#f8fafc;border-radius:14px}.example-cn{margin:0 0 8px;font-size:1rem;line-height:1.7;color:#111827}.example-ja{margin:0;color:var(--muted);font-size:.95rem;line-height:1.7}.phrase-card .word-main{font-size:clamp(1.6rem,3vw,2.1rem)}.list-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}@media(max-width:767px){.study-card{padding:18px;border-radius:16px}.word-main{font-size:1.9rem}.phrase-card .word-main{font-size:1.45rem}.example-box{padding:14px}}.empty-state{max-width:760px;margin:0 auto;text-align:center;padding:32px 0}.sitemap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.sitemap-list{margin:0;padding-left:18px}.sitemap-list li+li{margin-top:10px}.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;padding:0;background:none;border:none;cursor:pointer;border-radius:8px;transition:background .2s}.nav-toggle:hover{background:var(--primary-light)}.nav-toggle-bar{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease;transform-origin:center}.nav-toggle[aria-expanded=true] .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle[aria-expanded=true] .nav-toggle-bar:nth-child(2){opacity:0}.nav-toggle[aria-expanded=true] .nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}@media(max-width:767px){.nav-toggle{display:flex}.global-nav{display:none;position:fixed;inset:0;z-index:100;flex-direction:column;align-items:flex-start;gap:0;padding:80px 32px 32px;background:#fff;overflow-y:auto}.global-nav.is-open{display:flex}.global-nav a{width:100%;padding:16px 0;font-size:1.15rem;font-weight:700;border-bottom:1px solid var(--line)}.global-nav a:first-child{border-top:1px solid var(--line)}body.nav-open{overflow:hidden}.site-header{position:relative;z-index:101}}.nav-link{position:relative}.nav-link.is-active{color:var(--primary);font-weight:700}@media(min-width:768px){.nav-link:after{content:"";position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transition:transform .2s ease}.nav-link.is-active:after{transform:scaleX(1)}}@media(max-width:767px){.global-nav .nav-link.is-active{color:var(--primary);background:var(--primary-light);padding-left:12px;border-radius:8px}}