:root{--brand: #3b5bfd;--brand-deep: #1a2a6b;--ink: #0e1220;--accent: #00bfa5;--text: #1f2329;--text-sub: #646a73;--line: #ebedf0;--ease-out: cubic-bezier(.22, 1, .36, 1);--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px}*{margin:0;padding:0;box-sizing:border-box}@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;color:var(--text);background:#fff}.site{min-height:100vh;display:flex;flex-direction:column}.announcement{padding:10px 24px;text-align:center;font-size:14px;color:#fff;background:var(--accent)}.hero{padding:96px 24px 112px;text-align:center;color:#fff;background:radial-gradient(720px 320px at 78% -60px,rgba(0,191,165,.16),transparent 70%),linear-gradient(160deg,var(--ink) 0%,#101a3f 52%,var(--brand-deep) 100%)}@media (prefers-reduced-motion: no-preference){.hero-logo,.hero h1,.hero .slogan,.hero-actions{animation:hero-enter .28s var(--ease-out) both}.hero-logo{animation-delay:0ms}.hero h1{animation-delay:80ms}.hero .slogan{animation-delay:.16s}.hero-actions{animation-delay:.24s}}@keyframes hero-enter{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.hero-logo{width:120px;height:120px;border-radius:var(--radius-lg);box-shadow:0 12px 32px #3b5bfd59;margin-bottom:24px}.hero h1{font-size:52px;letter-spacing:0}.hero .slogan{margin-top:16px;font-size:20px;color:#ffffffd1;letter-spacing:1px}.hero-actions{margin-top:40px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.btn{position:relative;isolation:isolate;display:inline-block;padding:12px 32px;border-radius:var(--radius-sm);font-size:16px;text-decoration:none;cursor:pointer;border:1px solid transparent;background:none;transition:transform .2s var(--ease-out);will-change:transform}.btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;box-shadow:0 8px 20px #0000002e;opacity:0;transition:opacity .2s var(--ease-out);pointer-events:none;z-index:-1}.btn.primary{background:#fff;color:var(--ink);font-weight:600}.btn.ghost{border-color:#ffffff8c;color:#fff}@media (hover: hover) and (pointer: fine){.btn.primary:hover{transform:translateY(-2px)}.btn.primary:hover:after{opacity:1}.btn.ghost:hover{border-color:#fff;transform:translateY(-2px)}}.btn:active{transform:scale(.97)}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.features{padding:80px 24px;text-align:center}.features h2,.download h2{font-size:32px}.feature-grid{margin:48px auto 0;max-width:1080px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}.feature-card{position:relative;isolation:isolate;padding:32px 24px;border:1px solid var(--line);border-radius:var(--radius-md);text-align:left;background:#fff;transition:transform .2s var(--ease-out),border-color .2s var(--ease-out);will-change:transform;opacity:0}.feature-card:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;box-shadow:0 8px 24px #3b5bfd1f;opacity:0;transition:opacity .2s var(--ease-out);pointer-events:none;z-index:-1}@media (hover: hover) and (pointer: fine){.feature-card:hover{transform:translateY(-2px);border-color:transparent}.feature-card:hover:after{opacity:1}.feature-card:hover .feature-icon{color:var(--accent);background:#00bfa51a}}.feature-icon{width:48px;height:48px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--brand);background:#3b5bfd14;margin-bottom:16px;transition:color .2s var(--ease-out),background-color .2s var(--ease-out)}.feature-card h3{font-size:20px;color:var(--ink)}.feature-card p{margin-top:12px;color:var(--text-sub);line-height:1.7}@media (prefers-reduced-motion: no-preference){.features.in-view .feature-card,.download.in-view .dl-card{animation:reveal-fade .32s var(--ease-out) both}.features.in-view .feature-card:nth-child(1),.download.in-view .dl-card:nth-child(1){animation-delay:0ms}.features.in-view .feature-card:nth-child(2),.download.in-view .dl-card:nth-child(2){animation-delay:70ms}.features.in-view .feature-card:nth-child(3),.download.in-view .dl-card:nth-child(3){animation-delay:.14s}.features.in-view .feature-card:nth-child(4),.download.in-view .dl-card:nth-child(4){animation-delay:.21s}.features.in-view .feature-card:nth-child(5),.download.in-view .dl-card:nth-child(5){animation-delay:.28s}.features.in-view .feature-card:nth-child(6),.download.in-view .dl-card:nth-child(6){animation-delay:.35s}}@keyframes reveal-fade{0%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion: reduce){.feature-card,.dl-card{opacity:1}}.download{padding:80px 24px;text-align:center;background:#f6f8fb}.download-sub{margin-top:12px;color:var(--text-sub)}.download-grid{margin:40px auto 0;max-width:1080px;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px}.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:24px 16px 20px;display:flex;flex-direction:column;align-items:center;gap:6px;transition:transform .2s var(--ease-out);opacity:0}@media (hover: hover) and (pointer: fine){.dl-card:hover{transform:translateY(-2px)}}.dl-name{font-size:17px;font-weight:600;color:var(--ink)}.dl-meta{font-size:13px;color:var(--text-sub);min-height:18px}.dl-btn{margin-top:10px;padding:8px 28px;font-size:14px;background:var(--brand);color:#fff;font-weight:600}.dl-btn:after{box-shadow:0 6px 16px #3b5bfd59}@media (hover: hover) and (pointer: fine){.dl-btn:hover{transform:translateY(-2px)}.dl-btn:hover:after{opacity:1}}.dl-btn.disabled{background:#f0f2f5;color:#8a919c;cursor:default;font-weight:400}.dl-btn.disabled:after{display:none}.dl-note{font-size:12px;color:var(--text-sub)}.footer{margin-top:auto;padding:36px 24px 28px;text-align:center;color:#8a919c;font-size:14px;border-top:1px solid var(--line)}.footer-links{margin-bottom:14px;display:flex;gap:24px;justify-content:center;flex-wrap:wrap}.footer-links a{color:var(--text-sub);text-decoration:none;transition:color .2s var(--ease-out)}@media (hover: hover) and (pointer: fine){.footer-links a:hover,.footer-legal a:hover{color:var(--brand)}}.footer-links a:focus-visible,.footer-legal a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.footer-legal{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-bottom:10px;font-size:13px}.footer-legal a{color:#8a919c;text-decoration:none;transition:color .2s var(--ease-out)}.copyright{font-size:13px}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media (max-width: 640px){.hero{padding:72px 20px 88px}.hero h1{font-size:36px}.hero .slogan{font-size:16px;letter-spacing:0}.features h2,.download h2{font-size:26px}}