:root{--primary-color: #f7b500;--secondary-color: #ffe28a;--accent-color: #111827;--bg-warm: #fff3b8;--text-dark: #201600;--text-muted: #725318;--online-color: #16a34a}*{margin:0;padding:0;box-sizing:border-box;font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif}html,body,#app,.download-page{min-width:100%;min-height:100%}body{background-color:var(--bg-warm);color:var(--text-dark);line-height:1.6;overflow-x:hidden}.landing{position:relative;min-height:100vh;overflow:hidden}.bg-glow{position:fixed;inset:0;background:linear-gradient(180deg,#ffe47a,#fff0a8 44%,#fff8dc),repeating-linear-gradient(135deg,rgba(32,22,0,.05) 0 1px,transparent 1px 16px);z-index:-1}nav{display:inline-flex;align-items:center;gap:10px;padding:20px;width:100%;justify-content:center;font-weight:900;font-size:23px;color:var(--accent-color)}.brand-mark{width:34px;height:34px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:#ffd43b;background:var(--accent-color);font-size:20px}.container{max-width:560px;margin:0 auto;padding:16px 20px 44px;text-align:center}.hero-copy{margin-bottom:18px}.logo{width:112px;height:112px;background:var(--accent-color);border-radius:26px;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;color:#ffd43b;font-size:29px;font-weight:900;box-shadow:0 16px 34px #2016003d;border:3px solid rgba(255,255,255,.84);animation:pulse 2.4s infinite}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.04)}to{transform:scale(1)}}.eyebrow{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:5px 16px;border-radius:999px;background:#ffffffb8;color:var(--accent-color);font-size:.92rem;font-weight:800;border:1px solid rgba(32,22,0,.12);margin-bottom:12px}h1{font-size:2.9rem;margin-bottom:8px;font-weight:900;color:var(--text-dark)}.slogan{font-size:1.08rem;color:var(--text-muted);margin:0 auto;max-width:460px}.download-btn{display:block;width:100%;background:#111827;color:#ffd43b;text-decoration:none;padding:18px 36px;border-radius:50px;font-size:1.24rem;font-weight:900;box-shadow:0 15px 30px #20160042;transition:transform .3s cubic-bezier(.175,.885,.32,1.275);margin:22px 0 10px;border:1px solid rgba(255,255,255,.62)}.download-btn:active{transform:scale(.96)}.info-text{margin-bottom:24px;font-size:.86rem;color:#80611f}.phone-preview{width:min(100%,340px);min-height:386px;margin:0 auto 24px;padding:16px;border-radius:30px;background:#111827;box-shadow:0 22px 48px #20160033;border:3px solid rgba(255,255,255,.8);color:#111827;text-align:left}.phone-status,.chat-head,.chat-input{display:flex;align-items:center}.phone-status{justify-content:space-between;color:#f9fafb;font-size:.78rem;font-weight:800;padding:0 8px 12px}.phone-status span:last-child{color:#86efac}.chat-head,.chat-list,.chat-input{background:#fffdf3}.chat-head{gap:12px;border-radius:20px 20px 0 0;padding:14px}.avatar{width:44px;height:44px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:#ffd43b;color:#111827;font-weight:900}.chat-head p{font-weight:900;color:#111827}.chat-head span{display:inline-flex;align-items:center;gap:5px;color:#64748b;font-size:.8rem}.chat-head span:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--online-color)}.chat-list{min-height:202px;padding:12px 14px}.bubble{max-width:82%;padding:11px 13px;border-radius:8px;margin-bottom:12px;font-size:.92rem;line-height:1.45}.bubble.incoming{background:#fff;color:#111827;box-shadow:0 6px 14px #0f172a14}.bubble.outgoing{margin-left:auto;background:#ffd43b;color:#111827;font-weight:700}.bubble.small{width:fit-content}.chat-input{gap:10px;border-radius:0 0 20px 20px;padding:12px 14px 14px}.chat-input span{flex:1;height:36px;border-radius:999px;background:#f1f5f9}.chat-input button{height:36px;padding:0 15px;border:0;border-radius:999px;background:#111827;color:#ffd43b;font-weight:900}.features{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:28px}.feature-item{min-height:124px;background:#ffffffc2;padding:16px 14px;border-radius:8px;border:1px solid rgba(32,22,0,.12);box-shadow:0 10px 24px #20160014}.feature-item p:first-child{color:var(--accent-color);font-weight:900;font-size:1.12rem;margin-bottom:7px}.feature-item p:last-child{color:#71511a;font-size:.94rem}.footer{margin-top:50px;font-size:.85rem;color:#8a6b27}.open-browser-mask{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:28px;overflow:hidden;background:#111827f5}.open-browser-arrow{position:fixed;top:18px;right:18px;color:#fff;font-size:28px;line-height:1;letter-spacing:4px;transform:rotate(-35deg)}.open-browser-arrow:after{content:"";display:block;width:74px;height:74px;margin:-14px 0 0 -48px;border-top:3px solid var(--secondary-color);border-right:3px solid var(--secondary-color);transform:rotate(18deg)}.open-browser-panel{width:min(100%,400px);padding:40px 28px;text-align:center;color:#fff}.open-browser-icon{width:92px;height:92px;margin:0 auto 26px;border-radius:50%;border:3px solid var(--secondary-color);display:flex;align-items:center;justify-content:center;color:var(--secondary-color);font-size:52px;font-weight:800}.open-browser-panel h1{font-size:28px;margin-bottom:18px;color:#fff}.open-browser-panel p{color:#fff2c2;font-size:16px;margin-bottom:10px}.open-browser-badge{display:inline-block;margin-top:24px;padding:12px 28px;border-radius:999px;background:#ffd43b;color:#111827;font-size:16px;font-weight:900}@media(max-width:420px){.container{padding:12px 18px 36px}h1{font-size:2.42rem}.slogan{font-size:1rem}.download-btn{font-size:1.12rem;padding:16px 24px}.phone-preview{min-height:374px;border-radius:26px}.chat-list{min-height:190px}.features{gap:12px}.feature-item{min-height:132px;padding:13px}}