:root{--ink:#1d1d1f;--muted:#6e6e73;--subtle:#a1a1a6;--line:#e5e5ea;--blue:#0071e3;--blue-hover:#0077ed;--surface:#f5f5f7;--white:#fff;--sans:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI','Noto Sans SC',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--white);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5}a{color:inherit;text-decoration:none}img,svg{display:block}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;height:60px;padding:0 max(24px,calc((100vw - 1080px)/2));background:rgba(255,255,255,.88);border-bottom:1px solid rgba(229,229,234,.75);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:9px}.brand-icon{display:grid;place-items:center;width:28px;height:28px;overflow:hidden;border-radius:7px}.brand-icon img{width:28px;height:28px;object-fit:cover}.brand strong{font-size:14px}.site-header nav{display:flex;gap:27px;margin-left:auto}.site-header nav a{color:var(--muted);font-size:12px}.site-header nav a:hover{color:var(--ink)}.header-action{margin-left:26px;padding:7px 14px;border-radius:16px;background:var(--blue);color:#fff;font-size:11px;font-weight:600}.hero{max-width:780px;margin:0 auto;padding:68px 24px 54px;text-align:center}.app-icon{width:64px;height:64px;margin:0 auto 18px;overflow:hidden;border:1px solid var(--line);border-radius:14px;box-shadow:0 7px 20px rgba(0,0,0,.08)}.app-icon img{width:100%;height:100%;object-fit:cover}.hero h1{margin:0;color:var(--ink);font-size:18px;font-weight:700}.hero h2{margin:15px 0 17px;font-size:48px;line-height:1.15;letter-spacing:-.045em}.hero p{max-width:560px;margin:0 auto;color:var(--muted);font-size:16px}.hero-actions{display:flex;justify-content:center;align-items:center;gap:22px;margin-top:27px}.primary-button{display:inline-flex;align-items:center;justify-content:center;padding:11px 19px;border-radius:20px;background:var(--blue);color:#fff;font-size:13px;font-weight:600;transition:background .2s}.primary-button:hover{background:var(--blue-hover)}.text-button{color:var(--blue);font-size:13px;font-weight:500}.text-button:hover{text-decoration:underline}.platform-summary{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:29px;color:var(--subtle);font-size:10px}.platform-summary i{width:3px;height:3px;border-radius:50%;background:#c7c7cc}.download-section{padding:70px 24px 80px;background:var(--surface)}.section-heading{max-width:700px;margin:0 auto;text-align:center}.section-label{display:block;margin-bottom:10px;color:var(--blue);font-size:12px;font-weight:600}.section-heading h2{margin:0;font-size:34px;line-height:1.25;letter-spacing:-.035em}.section-heading p{margin:12px 0 0;color:var(--muted);font-size:14px}.platform-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:1080px;margin:40px auto 0}.platform-card{display:flex;flex-direction:column;min-height:285px;padding:25px 22px 21px;border:1px solid var(--line);border-radius:8px;background:#fff;transition:transform .2s,box-shadow .2s}.platform-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(0,0,0,.07)}.system-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:14px;background:#f2f2f4;color:var(--ink)}.system-icon svg{width:34px;height:34px;fill:currentColor}.apple-icon{font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:42px;line-height:1}.android-card .system-icon{background:#eafaf1;color:#279c58}.harmony-card .system-icon{background:#eef4ff;color:#286fda}.web-card .system-icon{background:#f3efff;color:#7258d6}.platform-copy{margin-top:22px}.status{display:block;color:var(--subtle);font-size:10px}.platform-card h3{margin:5px 0 5px;font-size:21px;letter-spacing:-.025em}.platform-card p{margin:0;color:var(--muted);font-size:12px}.platform-card>a{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding:10px 12px;border-radius:7px;background:var(--ink);color:#fff;font-size:12px;font-weight:600}.platform-card>a:hover{background:var(--blue)}.download-note{margin:20px auto 0;color:var(--subtle);font-size:10px;text-align:center}.features-section{max-width:1080px;margin:0 auto;padding:88px 24px 100px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:48px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.feature-grid article{padding:28px 30px}.feature-grid article+article{border-left:1px solid var(--line)}.feature-number{color:var(--blue);font-size:11px;font-weight:600}.feature-grid h3{margin:15px 0 6px;font-size:18px}.feature-grid p{margin:0;color:var(--muted);font-size:13px}footer{display:flex;align-items:center;max-width:1080px;margin:0 auto;padding:24px;border-top:1px solid var(--line);color:var(--muted);font-size:10px}footer>span{margin-left:auto}footer .brand strong{color:var(--ink);font-size:12px}footer .brand-icon,footer .brand-icon img{width:23px;height:23px}
@media(max-width:820px){.site-header{padding:0 20px}.site-header nav{display:none}.header-action{margin-left:auto}.hero{padding-top:52px;padding-bottom:45px}.hero h2{font-size:40px}.platform-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-width:600px}.platform-card{min-height:260px}.features-section{padding-top:70px;padding-bottom:80px}}
@media(max-width:520px){.site-header{height:56px}.header-action{padding:6px 12px}.hero{padding:42px 20px 40px}.app-icon{width:56px;height:56px;border-radius:12px}.hero h1{font-size:16px}.hero h2{margin-top:13px;font-size:34px}.hero p{font-size:14px;line-height:1.7}.hero-actions{margin-top:23px}.platform-summary{flex-wrap:wrap;margin-top:25px}.download-section{padding:54px 16px 62px}.section-heading h2{font-size:29px}.section-heading p{font-size:13px}.platform-grid{grid-template-columns:1fr;gap:9px;margin-top:31px}.platform-card{display:grid;grid-template-columns:54px 1fr auto;align-items:center;column-gap:15px;min-height:0;padding:17px 16px}.system-icon{grid-row:1;width:50px;height:50px;border-radius:12px}.system-icon svg{width:31px;height:31px}.apple-icon{font-size:37px}.platform-copy{grid-column:2;margin-top:0}.platform-card h3{margin:2px 0;font-size:17px}.platform-card p{font-size:11px}.status{font-size:9px}.platform-card>a{grid-column:3;grid-row:1;margin-top:0;padding:8px 10px;white-space:nowrap;font-size:10px}.features-section{padding:62px 20px 70px}.feature-grid{grid-template-columns:1fr;margin-top:34px}.feature-grid article{padding:22px 6px}.feature-grid article+article{border-left:0;border-top:1px solid var(--line)}footer{margin:0 20px;padding-left:0;padding-right:0}}
@media(max-width:380px){.platform-card{grid-template-columns:48px 1fr}.platform-card>a{grid-column:2;grid-row:2;margin-top:10px;width:max-content}.system-icon{width:46px;height:46px}.platform-summary{font-size:9px}.platform-summary i{display:none}}