:root{--bg:#FFF9EC;--card:#fff;--light:#F7EBCB;--yellow:#E9B92F;--leaf:#6A8247;--head:#302718;--ink:#514637;--muted:#746651;--line:#E7DCC4}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.78;overflow-wrap:anywhere}a{color:#5a6736;text-underline-offset:3px}a:hover{color:#302718}a:focus-visible,button:focus-visible{outline:3px solid #6A8247;outline-offset:3px}button{font:inherit;cursor:pointer}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}.wrap{width:min(1160px,calc(100% - 40px));margin-inline:auto;min-width:0}.site-header{background:#fffdf7;border-bottom:1px solid var(--line)}.head-top{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--head);font-weight:800;min-width:0}.brand img{height:30px;width:auto;max-width:76px}.brand-mark{display:grid;place-items:center;height:30px;width:30px;border-radius:8px;background:var(--yellow);color:var(--head)}.brand-name{font-size:18px;line-height:1.12}.brand-name small{display:block;font-size:9px;letter-spacing:.1em;margin-top:4px;color:var(--muted)}.desktop-nav,.shortcuts{display:flex;gap:clamp(12px,2vw,26px);align-items:center;flex-wrap:wrap}.desktop-nav a,.shortcuts a{font-size:15px;color:var(--head);text-decoration:none;padding:8px 3px}.desktop-nav a[aria-current],.shortcuts a[aria-current]{border-bottom:2px solid var(--yellow)}.shortcuts{padding-block:5px 10px;border-top:1px solid var(--line)}.shortcuts a{font-size:14px;padding:3px 2px}.menu-open{display:none;border:1px solid var(--line);background:var(--light);border-radius:10px;padding:7px 14px;min-height:44px}.main-content{padding-block:44px 66px;min-width:0}.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:30px;align-items:center}.hero h1{font-size:clamp(26px,2.5vw,34px);line-height:1.3;margin:12px 0 18px;color:var(--head)}.eyebrow{font-size:13px;letter-spacing:.07em;font-weight:700;color:#64783f}.lead{font-size:17px}.hero-picture{background:var(--light);padding:12px;border-radius:14px;display:grid;place-items:center;min-width:0}.hero-picture img{max-height:300px;width:auto;max-width:100%}.image-fallback{min-height:108px;display:grid;place-items:center;align-content:center;text-align:center;background:linear-gradient(135deg,#F7EBCB,#fff6dc);border:1px solid var(--line);border-radius:12px;color:#655329;padding:18px;font-size:15px;font-weight:700}.hero-picture .image-fallback{width:100%;min-height:205px}.buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 18px;background:var(--yellow);border-radius:10px;text-decoration:none;color:var(--head);font-weight:700}.btn.secondary{background:#fff;border:1px solid var(--line)}.home-section{margin-top:56px}.section-title{font-size:clamp(21px,2vw,26px);margin:0 0 17px;color:var(--head);line-height:1.4}.section-intro{max-width:850px;margin:0 0 20px}.grid{display:grid;gap:18px;min-width:0}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:12px;min-width:0}.card h3{font-size:19px;line-height:1.45;margin:0 0 9px;color:var(--head)}.card p{margin:0 0 12px}.card a.more{font-weight:700}.visual-card{display:flex;gap:14px;align-items:flex-start}.visual-card .card-image{flex:0 0 34%;min-width:0;padding:7px;background:var(--bg);border-radius:10px}.card-image img{max-height:170px;width:auto;margin:auto}.visual-card .image-fallback{min-height:125px;font-size:12px}.visual-card .card-text{min-width:0;flex:1}.feature{display:grid;grid-template-columns:minmax(0,.84fr) minmax(0,1.16fr);gap:25px;align-items:center;background:var(--light);border-radius:14px;padding:24px}.feature img{max-height:185px;width:auto;margin:auto}.feature .image-fallback{min-height:155px}.feature.reverse{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}.feature h2,.feature h3{color:var(--head)}.note-stack{display:grid;gap:14px}.note{padding:18px 22px;background:white;border-left:4px solid var(--yellow);border-radius:8px}.note h3{margin:0 0 5px;font-size:19px}.note p{margin:0}.reading-layout{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);gap:25px}.path-list{display:grid;gap:12px}.path{padding:13px 17px;background:#fff;border:1px solid var(--line);border-radius:10px}.path strong{display:block;color:var(--head)}.column-feature{max-width:930px;background:white;border-radius:14px;border:1px solid var(--line);padding:24px}.column-feature p{margin:0 0 14px}.mobile-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;padding:24px;background:var(--light);border-radius:14px;align-items:center}.mobile-image{display:flex;align-items:center;justify-content:center;gap:16px;min-width:0}.mobile-image .app-img{max-height:380px;max-width:75%;width:auto}.mobile-image .app-icon{height:64px;width:auto;max-width:64px}.page-intro{padding:24px 26px;background:var(--light);border-radius:14px;margin-bottom:30px}.page-intro h1{font-size:clamp(26px,2.5vw,34px);line-height:1.35;color:var(--head);margin:0 0 12px}.page-intro p{margin:0}.article-body{max-width:940px}.article-section{margin:0 0 36px;padding-bottom:22px;border-bottom:1px solid var(--line)}.article-section h2{font-size:clamp(21px,2vw,26px);color:var(--head);line-height:1.4;margin:0 0 12px}.article-section p{margin:0 0 13px}.article-section .related{font-size:14px;color:var(--muted)}.article-visual{display:grid;place-items:center;max-width:500px;background:var(--light);border-radius:12px;padding:10px;margin:0 0 18px}.article-visual img{max-height:190px;width:auto}.article-visual .image-fallback{width:100%;min-height:120px}.faq-list{max-width:940px}.faq-list article{background:white;border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:14px}.faq-list h2{font-size:20px;color:var(--head);margin:0 0 8px}.faq-list p{margin:0}.site-footer{background:#f4ecd8;border-top:1px solid var(--line);padding:40px 0 28px}.footer-brand{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:var(--head)}.footer-brand img{height:28px;width:auto;max-width:70px}.footer-brand span{font-size:13px;color:var(--muted)}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:24px}.footer-groups h2{font-size:16px;margin:0 0 9px;color:var(--head)}.footer-groups section>div{display:flex;flex-wrap:wrap;gap:5px 13px}.footer-groups a{font-size:14px;color:var(--ink);text-decoration:none}.footer-note{font-size:13px;margin-top:24px;border-top:1px solid #ddcda9;padding-top:14px}.skip{position:absolute;top:-100px;left:8px;background:#fff;padding:8px;z-index:60}.skip:focus{top:8px}.menu-overlay,.mobile-menu,.bottom-nav{display:none}@media(max-width:900px){.grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.desktop-nav{gap:10px}}@media(max-width:650px){.wrap{width:calc(100% - 36px)}.head-top{min-height:60px}.brand-name{font-size:16px}.brand img{height:28px}.desktop-nav,.shortcuts{display:none}.menu-open{display:inline-flex;align-items:center;gap:6px}.main-content{padding-block:30px 80px}.hero,.grid.three,.grid.two,.feature,.feature.reverse,.reading-layout,.mobile-feature{grid-template-columns:minmax(0,1fr)}.hero{gap:18px}.hero-picture img{max-height:220px}.hero-picture .image-fallback{min-height:155px}.home-section{margin-top:38px}.card{padding:17px}.visual-card .card-image{flex-basis:32%}.feature,.mobile-feature{padding:17px}.feature img{max-height:160px}.mobile-image .app-img{max-height:300px}.page-intro{padding:19px 17px}.article-section{margin-bottom:27px}.article-section h2{font-size:22px}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.bottom-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:fixed;bottom:0;left:0;right:0;min-height:56px;padding-bottom:env(safe-area-inset-bottom);background:#fffdf7;border-top:1px solid var(--line);z-index:15}.bottom-nav a{display:grid;place-items:center;text-decoration:none;color:var(--head);font-size:14px;min-height:56px}.bottom-nav a[aria-current]{background:#fff4d6;border-top:3px solid var(--yellow)}.site-footer{padding-bottom:calc(65px + env(safe-area-inset-bottom))}.menu-overlay:not([hidden]){display:block;position:fixed;inset:60px 0 0;background:rgba(48,39,24,.38);z-index:30}.mobile-menu:not([hidden]){display:block;position:fixed;top:60px;left:0;right:0;max-height:calc(100dvh - 60px);overflow-y:auto;overscroll-behavior:contain;background:var(--bg);z-index:31;padding:14px 18px 24px;border-top:1px solid var(--line);box-shadow:0 12px 20px #30271822}.menu-heading{display:flex;align-items:center;justify-content:space-between}.menu-close{min-width:44px;min-height:44px;border:1px solid var(--line);background:white;border-radius:9px}.menu-groups{display:grid;gap:9px}.menu-groups h2{font-size:15px;margin:7px 0;color:var(--head)}.menu-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 9px}.menu-links a{display:flex;align-items:center;padding:6px 10px;min-height:44px;background:white;border:1px solid var(--line);border-radius:8px;color:var(--ink);text-decoration:none;font-size:14px}.menu-links a[aria-current]{background:var(--light);border-color:var(--yellow)}body.menu-active{overflow:hidden}}@media(max-width:375px){.wrap{width:calc(100% - 32px)}.brand-name small{font-size:8px}.visual-card{flex-direction:column}.visual-card .card-image{width:100%}.card-image img{max-height:135px}.footer-groups{gap:14px}.footer-groups section>div{gap:5px 9px}}