:root{--green:#49a958;--ink:#202a23;--muted:#6d786f;--line:#e3e9e3;--mint:#edf8ef;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fafcf9;font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:100px}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}img{display:block;max-width:100%}svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid var(--green);outline-offset:5px}::selection{background:#d7efdc}.wrap{width:min(1160px,calc(100% - 80px));margin-inline:auto}.icon-definitions{position:absolute;width:0;height:0;overflow:hidden}.skip-link{position:fixed;z-index:30;top:8px;left:8px;transform:translateY(-160%);background:white;padding:14px;border-radius:8px}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:10;background:#fafcf9ed;border-bottom:1px solid #e3e9e380;backdrop-filter:blur(18px)}.header-inner{height:86px;display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:11px;font-weight:750;font-size:22px;letter-spacing:-.7px}.brand img{border-radius:50%}.brand-light{font-weight:550;margin-left:3px}.site-header nav{display:flex;align-items:center;gap:30px;font-size:15px}.site-header nav>a:not(.button){display:inline-flex;align-items:center;gap:8px}.site-header nav>a:hover{color:var(--green)}.small-icon{width:17px;height:17px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:56px;padding:16px 24px;border:1px solid transparent;border-radius:12px;background:var(--green);color:white;font-size:16px;font-weight:600;transition:background .2s,transform .2s}.button:hover{background:#3c914a;transform:translateY(-2px)}.button-outline{background:white;border-color:#d9e3da;color:var(--ink)}.button-outline:hover{background:var(--mint)}.button-small{min-height:42px;padding:10px 16px;font-size:14px;border-radius:9px}.button-small svg{width:17px;height:17px}.site-header nav>.button:hover{color:white}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);background:white;border-radius:50%;color:var(--ink)}.icon-button:hover{background:var(--mint)}.menu-toggle{display:none}
.hero{text-align:center;padding-top:92px;padding-bottom:64px}.eyebrow{display:flex;align-items:center;justify-content:center;gap:10px;font-size:13px;letter-spacing:2px;font-weight:600;color:var(--muted);margin:0 0 24px}.live-dot{width:6px;height:6px;background:var(--green);border-radius:50%}h1{font-size:clamp(38px,5.4vw,70px);line-height:1.3;letter-spacing:-2.8px;margin:0 0 22px;font-weight:750}h1 span{color:var(--green)}.hero-description{font-size:20px;line-height:1.8;color:var(--muted);margin:0 0 32px}.download-actions{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}.version-note{font-size:13px;color:var(--muted);line-height:1.8;margin:20px 0 0}.separator{margin:0 10px;color:#a5b0a5}.mobile-break{display:none}
.demo-section{margin-bottom:72px;display:grid;grid-template-columns:1.35fr 1fr;gap:24px}.lyrics-demo,.chart-demo{border-radius:24px;border:1px solid var(--line);min-width:0;overflow:hidden}.lyrics-demo{background:radial-gradient(ellipse at 80% 10%,#dfefdf,transparent 70%),#eef5eb;padding:30px 34px 22px}.demo-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.demo-label{color:#72866f;font-size:14px}.demo-top h2{font-size:24px;font-weight:600;margin:10px 0 0;letter-spacing:-.7px}.demo-top h2 span{font-size:14px;color:var(--muted);font-weight:400;margin-left:10px}.demo-badge{font-size:12px;color:var(--muted);white-space:nowrap;padding:7px 10px;background:#ffffff70;border-radius:7px}.lyrics-window{height:240px;overflow-y:auto;overflow-x:hidden;overscroll-behavior-y:contain;scrollbar-width:thin;scrollbar-color:#acc4a6 transparent;margin:18px 0 10px;mask-image:linear-gradient(transparent,#000 18%,#000 82%,transparent)}#lyric-track{padding-block:96px;text-align:center}.lyric-line{display:block;width:100%;border:0;border-radius:8px;background:transparent;padding:0 8px;cursor:pointer;height:48px;line-height:48px;margin:0;font-size:18px;color:#8b9986;white-space:nowrap;letter-spacing:.3px}.lyric-line:hover{background:#ffffff50;color:#345b38}.lyric-line:focus-visible{outline:2px solid var(--green);outline-offset:-3px}.lyrics-window:focus-visible{outline:2px solid var(--green);outline-offset:3px}.lyric-line.is-active{font-size:21px;font-weight:650;color:#345b38}.demo-controls{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #d6e3d1;padding-top:15px}.demo-controls>span{font-size:13px;color:#71816c;font-variant-numeric:tabular-nums}.demo-controls>div{display:flex;align-items:center;gap:10px}.demo-controls .icon-button{width:38px;height:38px;border-color:#d6e3d1;background:transparent}.demo-button{border:0;border-radius:8px;background:#ffffff80;color:#476c45;padding:10px 12px;font-size:13px}.demo-button:hover{background:white}.chart-demo{background:white;padding:32px}.chart-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.chart-heading h2{font-size:24px;font-weight:650;margin:0}.chart-heading h2 span{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:9px}.chart-heading .demo-badge{background:#f4f7f2}.chart-list{list-style:none;padding:0;margin:24px 0}.chart-list li{display:flex;align-items:center;gap:20px;min-height:76px;border-bottom:1px solid var(--line)}.chart-list li:last-child{border-bottom:0}.chart-number{color:var(--green);font-size:17px;font-variant-numeric:tabular-nums;font-weight:550}.chart-list h3{font-size:17px;font-weight:550;margin:0 0 5px}.chart-list p{font-size:14px;color:var(--muted);margin:0}.chart-list svg{margin-left:auto;color:var(--green);width:19px;height:19px}.local-note{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin:22px 0 0}.local-note svg{width:17px;height:17px}
.experience{padding-top:80px;padding-bottom:72px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px}.section-heading h2,.download-panel h2{font-size:32px;font-weight:600;letter-spacing:-1px;margin:0}.section-heading>p{font-size:14px;color:var(--muted);margin:0}.gallery{display:grid;grid-template-columns:1fr 1fr .65fr;gap:18px}.gallery-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:19px;background:#f0f4ed;overflow:hidden;transition:transform .25s}.gallery-card:hover{transform:translateY(-4px)}.card-heading{display:flex;align-items:center;justify-content:space-between;padding:23px 23px 0;gap:12px}.card-heading h3{font-size:17px;font-weight:550;margin:0}.zoom-hint{color:var(--muted);font-size:20px}.gallery-desktop>img,.gallery-search>img{width:100%;height:270px;object-fit:contain;margin:auto 0}.gallery-mobile{background:#eaf0e5}.mobile-image-frame{width:102px;margin:25px auto;overflow:hidden;border:3px solid #283328;border-radius:14px;box-shadow:0 12px 25px #384a3922}.mobile-image-frame img{width:100%;height:auto}
.download-section{padding-bottom:66px}.download-panel{border-top:1px solid var(--line);padding:46px 20px 0;text-align:center}.download-panel h2{margin-bottom:26px}.download-note{font-size:14px;color:var(--muted);margin:20px 0}.button-version{font-size:13px;font-weight:400;opacity:.9}.source-link{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:#5d775d}.source-link svg{width:17px;height:17px}.source-link:hover{color:var(--green)}.site-footer{border-top:1px solid var(--line);padding-top:25px;padding-bottom:25px}.footer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.footer-top .brand{font-size:18px}.footer-top>a:last-child{color:var(--muted);padding:8px}.site-footer>p{font-size:13px;color:var(--muted);line-height:1.9;margin:8px 0;overflow-wrap:anywhere}.site-footer .api-credits{font-size:12px}.copyright{padding-top:6px}
.lightbox{padding:0;border:1px solid #ffffff1f;border-radius:20px;background:#f8faf7;color:var(--ink);width:min(1200px,94vw);max-width:94vw;max-height:94dvh;box-shadow:0 30px 100px #0005}.lightbox::backdrop{background:#111b16d9;backdrop-filter:blur(10px)}.lightbox:not([open]){display:none}.lightbox[open]{display:flex;flex-direction:column}.lightbox-toolbar{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;flex-shrink:0}.lightbox-toolbar h2{font-size:16px;font-weight:550;margin:0}.lightbox-image-wrap{min-height:0;display:flex;align-items:center;justify-content:center;overflow:auto;background:#edf0ea;padding:8px}.lightbox-image-wrap img{max-height:calc(94dvh - 155px);max-width:100%;object-fit:contain}.lightbox-controls{display:flex;justify-content:center;align-items:center;gap:20px;padding:12px;flex-shrink:0}.lightbox-controls p{font-size:14px;color:var(--muted);text-align:center;min-width:220px}.lightbox-controls .icon-button{font-size:20px}.lightbox-open{overflow:hidden}
.button-copy{display:flex;flex-direction:column;gap:5px;text-align:left;line-height:1.3}.download-tip{font-size:12px;font-weight:400;color:#fff}.download-actions .button{min-height:72px}.source-link.button{gap:14px;padding:15px 22px;min-height:72px;color:var(--ink);border-color:#d9e3da}.source-link.button svg{width:21px;height:21px}.source-description{font-size:13px;font-weight:400;color:var(--muted)}
.footer-socials{display:flex;align-items:center;gap:10px}.footer-socials a{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:12px;color:var(--muted);transition:background .2s,color .2s}.footer-socials svg{width:29px;height:29px}.footer-socials a:hover{background:var(--mint);color:var(--green)}
.button-outline .download-tip{color:var(--muted)}
.chart-list li{gap:14px}.chart-cover{width:46px;height:46px;flex-shrink:0;object-fit:cover;border-radius:9px;background:var(--mint)}.chart-list li>div{min-width:0}.chart-list h3,.chart-list p{overflow-wrap:anywhere}.chart-number{flex-shrink:0}
@media(max-width:1000px){.wrap{width:calc(100% - 48px)}.site-header nav{gap:20px}.lyrics-demo{padding-inline:24px}.chart-demo{padding:28px 24px}.lyric-line{font-size:16px}.lyric-line.is-active{font-size:18px}.gallery{gap:12px}.card-heading{padding-inline:18px}}
@media(max-width:760px){:root{scroll-padding-top:90px}.wrap{width:calc(100% - 36px)}.header-inner{height:72px}.brand{font-size:20px}.brand img{width:31px;height:31px}.menu-toggle{display:flex}.site-header nav{position:absolute;left:18px;right:18px;top:72px;padding:18px;border:1px solid var(--line);border-radius:16px;background:white;box-shadow:0 15px 30px #22372814;flex-direction:column;align-items:stretch;gap:0}.site-header nav>a{padding:14px}.site-header nav>.button{margin-top:8px;justify-content:center}.js .site-header nav{display:none}.js .site-header nav.is-open{display:flex}html:not(.js) .header-inner{height:auto;min-height:72px;flex-wrap:wrap;padding-block:16px}html:not(.js) .site-header nav{position:static;flex-direction:row;flex-wrap:wrap;margin-top:14px;width:100%;box-shadow:none;border:0;padding:0}html:not(.js) .menu-toggle{display:none}.hero{padding:56px 0 38px}.eyebrow{font-size:12px;letter-spacing:1.1px}h1{font-size:clamp(31px,7vw,48px);letter-spacing:-1.5px}.hero-description{font-size:18px;margin-bottom:26px}.button{min-height:52px;font-size:15px;padding:14px 18px;gap:8px}.button svg{width:18px;height:18px}.hero .download-actions{gap:10px}.version-note{font-size:12px;max-width:320px;margin:18px auto 0}.separator{margin:0 6px}.demo-section{margin-bottom:40px;grid-template-columns:1fr;gap:16px}.lyrics-demo,.chart-demo{border-radius:19px;padding:24px}.demo-top h2,.chart-heading h2{font-size:23px}.lyric-line{font-size:16px;letter-spacing:0}.lyric-line.is-active{font-size:18px}.chart-list{margin-bottom:12px}.local-note{margin-top:15px}.experience{padding-top:45px;padding-bottom:40px}.section-heading h2,.download-panel h2{font-size:26px}.section-heading>p{font-size:12px}.gallery{grid-template-columns:1fr;gap:14px}.gallery-card{border-radius:17px}.card-heading{padding:22px 24px 0}.gallery-search>img,.gallery-desktop>img{height:auto;margin:8px 0 15px}.mobile-image-frame{width:160px;margin:25px auto}.download-section{padding-bottom:40px}.download-panel{padding:32px 0 0}.download-panel .download-actions{flex-direction:column}.download-panel .button{width:100%;max-width:310px}.download-note{font-size:13px}.site-footer>p{font-size:13px}.site-footer .api-credits{font-size:12px}.credit-divider{display:block;font-size:0}.lightbox-toolbar{padding:10px 13px}.lightbox-controls{gap:8px}.lightbox-controls p{min-width:0;flex:1;font-size:13px}.lightbox-image-wrap{padding:0}.lightbox-image-wrap img{max-height:calc(94dvh - 145px)}}
@media(max-width:380px){.hero .download-actions{flex-direction:column}.hero .download-actions .button{width:260px}.lyrics-demo,.chart-demo{padding-inline:18px}.demo-badge{font-size:12px;padding:6px}.lyric-line{font-size:14px}.lyric-line.is-active{font-size:16px}.section-heading{align-items:flex-start;flex-direction:column;gap:8px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}.button:hover,.gallery-card:hover{transform:none}}