:root{--bg-primary: #ffffff;--bg-secondary: #f5f5f7;--bg-tertiary: rgba(255, 255, 255, .85);--text-primary: #1d1d1f;--text-secondary: #86868b;--text-tertiary: #a1a1a6;--color-primary: #FF6B00;--color-primary-hover: #E66000;--color-accent: #FFA366;--shadow-sm: 0 4px 14px rgba(0, 0, 0, .05);--shadow-md: 0 10px 30px rgba(0, 0, 0, .08);--shadow-lg: 0 20px 50px rgba(0, 0, 0, .1);--font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-size-base: 17px;--line-height-base: 1.47059}@media(prefers-color-scheme:dark){:root{--bg-primary: #000000;--bg-secondary: #1d1d1f;--bg-tertiary: rgba(29, 29, 31, .85);--text-primary: #f5f5f7;--text-secondary: #86868b;--text-tertiary: #a1a1a6;--shadow-md: 0 10px 30px rgba(255, 255, 255, .03);--shadow-lg: 0 20px 50px rgba(255, 255, 255, .05)}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);font-size:var(--font-size-base);line-height:var(--line-height-base);color:var(--text-primary);background-color:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;transition:background-color .3s ease,color .3s ease}a{text-decoration:none;color:var(--color-primary);transition:color .2s ease}h1,h2,h3,h4{font-weight:600;letter-spacing:-.015em}.center-text{text-align:center}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:980px;font-weight:500;cursor:pointer;transition:all .2s ease;border:none}.btn-primary{background-color:var(--text-primary);color:var(--bg-primary)}@media(prefers-color-scheme:dark){.btn-primary{background-color:var(--text-primary);color:var(--bg-primary)}}.btn-primary:hover{transform:scale(1.02);opacity:.9}.btn-secondary{background-color:transparent;color:var(--color-primary);border:1px solid var(--color-primary)}.btn-secondary:hover{background-color:#ff6b000d}.btn-sm{padding:8px 16px;font-size:14px}.btn-lg{padding:16px 32px;font-size:17px}.navbar{position:fixed;top:0;width:100%;height:52px;background-color:var(--bg-tertiary);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);z-index:9999;border-bottom:1px solid rgba(0,0,0,.05)}@media(prefers-color-scheme:dark){.navbar{border-bottom:1px solid rgba(255,255,255,.05)}}.nav-container{max-width:980px;margin:0 auto;height:100%;padding:0 20px;display:flex;justify-content:space-between;align-items:center}.nav-brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:18px}.nav-icon{width:24px;height:24px;border-radius:6px;object-fit:cover}.nav-title{color:var(--text-primary)}.nav-links{display:flex;align-items:center;gap:24px}.nav-link{font-size:14px;color:var(--text-primary);opacity:.8}.nav-link:hover{opacity:1}main{padding-top:52px}.hero{max-width:980px;margin:0 auto;padding:120px 20px 80px;text-align:center;display:flex;flex-direction:column;align-items:center}.hero-title{font-size:clamp(40px,8vw,64px);font-weight:700;letter-spacing:-.02em;margin-bottom:24px;color:var(--text-primary)}.highlight-text{background:linear-gradient(135deg,#ff5100,#ff8a00);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:clamp(18px,2.5vw,22px);color:var(--text-secondary);max-width:640px;margin:0 auto 40px;font-weight:400;line-height:1.6}.hero-subtitle p{margin-bottom:16px}.hero-subtitle p:last-child{margin-bottom:0}.hero-subtitle-strong{color:var(--text-primary);font-weight:500;margin-top:24px}.hero-actions{display:flex;gap:16px;justify-content:center;margin-bottom:60px}.device-mockup{position:relative;width:100%;max-width:320px;margin:0 auto}.mockup-img{width:100%;height:auto;object-fit:cover;border-radius:40px;box-shadow:var(--shadow-lg);display:block}.feature-section{max-width:1060px;margin:0 auto;padding:80px 20px;display:flex;flex-direction:column;gap:120px}.feature-row{display:flex;align-items:center;justify-content:space-between;gap:60px}.feature-row.reverse{flex-direction:row-reverse}.feature-text{flex:1;max-width:440px}.feature-headline{font-size:40px;font-weight:600;margin-bottom:20px;color:var(--text-primary)}.feature-desc{font-size:19px;color:var(--text-secondary);line-height:1.5}.feature-image{flex:1;display:flex;justify-content:center;position:relative}.shadow-img{max-width:300px;width:100%;height:auto;box-shadow:var(--shadow-lg)}.rounded{border-radius:36px}.image-group{position:relative;width:350px;height:580px}.overlay-back{position:absolute;top:0;left:0;width:250px;transform:scale(.9) translate(-40px);opacity:.6;z-index:1}.overlay-front{position:absolute;top:40px;right:0;width:250px;z-index:2}.gamification-section{background-color:var(--bg-secondary);padding:100px 20px}.section-header{max-width:700px;margin:0 auto 60px}.section-title{font-size:40px;margin-bottom:16px}.section-desc{font-size:19px;color:var(--text-secondary)}.bento-grid{max-width:980px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.bento-card{background:var(--bg-primary);border-radius:24px;padding:40px;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease}.bento-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}.bento-card.highlight-card{grid-column:span 1}.bento-icon{font-size:48px;margin-bottom:24px}.bento-card h3{font-size:24px;margin-bottom:12px}.bento-card p{font-size:16px;color:var(--text-secondary)}.bottom-cta{padding:120px 20px;text-align:center}.cta-content h2{font-size:48px;margin-bottom:16px}.cta-content p{font-size:21px;color:var(--text-secondary);margin-bottom:40px}.footer{background-color:var(--bg-secondary);padding:40px 20px;border-top:1px solid rgba(0,0,0,.05)}@media(prefers-color-scheme:dark){.footer{border-top:1px solid rgba(255,255,255,.05)}}.footer-content{max-width:980px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:16px}.footer-logo{font-weight:600;font-size:14px;color:var(--text-secondary)}.footer-links{display:flex;gap:24px}.footer-links a{font-size:12px;color:var(--text-secondary)}.footer-links a:hover{text-decoration:underline;color:var(--text-primary)}.footer-copyright{font-size:12px;color:var(--text-tertiary);margin-top:16px}.observe-me{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}.observe-me.visible{opacity:1;transform:translateY(0)}@media(max-width:834px){.feature-row,.feature-row.reverse{flex-direction:column;text-align:center;gap:40px}.feature-text{max-width:100%}.bento-grid{grid-template-columns:1fr}}@media(max-width:600px){.hero-actions{flex-direction:column;width:100%}.hero-actions .btn{width:100%}.image-group{width:100%;height:auto;display:flex;flex-direction:column;align-items:center;gap:20px}.overlay-back,.overlay-front{position:static;transform:none;width:80%;max-width:250px}}