:root{--blue:#1478ff;--cyan:#27c9ff;--ink:#15233d;--muted:#66748d;--line:#dfe9f5;--soft:#f5f9fe;--green:#22c787;--orange:#ffb648;--purple:#8b6df6;--radius:22px;--shadow:0 22px 55px rgba(31,79,139,.13)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;line-height:1.68;background:#fff}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.header{position:sticky;top:0;z-index:100;height:70px;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(222,233,246,.9);backdrop-filter:blur(16px)}.nav{height:100%;display:flex;align-items:center;gap:34px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:900}.brand-mark{width:37px;height:37px;display:grid;place-items:center;color:#fff;background:linear-gradient(145deg,#33caff,#1478ff);border-radius:13px 13px 13px 4px;box-shadow:0 8px 22px rgba(20,120,255,.26)}.nav-links{display:flex;gap:27px;margin-left:auto;color:#465670;font-size:14px}.nav-links a:hover,.nav-links .active{color:var(--blue)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border:1px solid transparent;border-radius:12px;font-weight:800;transition:.2s}.btn-primary{color:#fff;background:var(--blue);box-shadow:0 10px 23px rgba(20,120,255,.25)}.btn-primary:hover{transform:translateY(-2px);background:#0763db}.btn-outline{color:var(--blue);background:#fff;border-color:#bcd7fb}.btn-outline:hover{transform:translateY(-2px);border-color:var(--blue)}.btn-white{color:var(--blue);background:#fff}.btn-ghost{color:#fff;border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.08)}
.hero{position:relative;overflow:hidden;padding:88px 0 78px;background:radial-gradient(circle at 8% 10%,rgba(39,201,255,.16),transparent 25%),linear-gradient(145deg,#f0f8ff,#fff 58%,#eefbff)}.hero:before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle,rgba(20,120,255,.1) 1px,transparent 1.5px);background-size:29px 29px;mask-image:linear-gradient(90deg,transparent,#000)}.hero-grid{position:relative;display:grid;grid-template-columns:.92fr 1.08fr;align-items:center;gap:54px}.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;color:#0b6cdd;background:#e3f2ff;border:1px solid #c8e3ff;border-radius:999px;font-size:12px;font-weight:800}.badge:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(34,199,135,.12)}h1{margin:19px 0 16px;font-size:clamp(42px,5vw,64px);line-height:1.13;letter-spacing:-2px}.hero h1 span{color:var(--blue)}.lead{margin:0 0 29px;color:var(--muted);font-size:18px}.actions{display:flex;flex-wrap:wrap;gap:13px}.requirements{display:flex;flex-wrap:wrap;gap:17px;margin:21px 0 0;padding:0;list-style:none;color:#60708a;font-size:12px}.requirements li:before{content:"✓";margin-right:6px;color:var(--green);font-weight:900}
.chat-stage{position:relative;padding:16px}.chat-stage>img{width:100%;border:8px solid #fff;border-radius:27px;box-shadow:var(--shadow)}.bubble{position:absolute;display:flex;align-items:center;gap:9px;padding:12px 15px;border-radius:15px;box-shadow:var(--shadow);font-size:12px;font-weight:800}.bubble i{width:9px;height:9px;border-radius:50%}.bubble.one{left:-12px;top:45px;color:#fff;background:var(--blue)}.bubble.one i{background:#6ef1c3}.bubble.two{right:-10px;bottom:34px;background:#fff}.bubble.two i{background:var(--orange)}.bubble.three{left:44px;bottom:-10px;color:#fff;background:#172f58}.bubble.three i{background:var(--cyan)}
.trust{padding:24px 0;border-bottom:1px solid var(--line)}.trust-inner{display:flex;align-items:center;justify-content:space-between;gap:28px}.trust strong{font-size:18px}.brands{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:29px;color:#53617a;font-weight:900}
.section{padding:92px 0}.soft{background:var(--soft)}.dark{color:#fff;background:#071a38}.section-head{max-width:740px;margin:0 auto 46px;text-align:center}.section-head.left{margin-left:0;text-align:left}.eyebrow{color:var(--blue);font-size:12px;font-weight:900;letter-spacing:1.5px}.dark .eyebrow{color:#51d4ff}.section-head h2,.copy h2{margin:9px 0 12px;font-size:clamp(30px,4vw,44px);line-height:1.23;letter-spacing:-1px}.section-head p,.copy>p{margin:0;color:var(--muted);font-size:16px}.dark .section-head p{color:#afc0d9}
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.download-card{padding:25px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;transition:.22s}.download-card:hover{transform:translateY(-6px);border-color:#acd5ff;box-shadow:var(--shadow)}.os{width:53px;height:53px;display:grid;place-items:center;color:#fff;background:linear-gradient(145deg,#32c5ff,#1478ff);border-radius:16px;font-size:22px;font-weight:900}.download-card h3{margin:19px 0 2px;font-size:21px}.version{color:var(--blue);font-size:12px;font-weight:800}.meta{margin:17px 0;padding:14px 0;border-top:1px dashed var(--line);border-bottom:1px dashed var(--line)}.meta div{display:flex;justify-content:space-between;gap:9px;margin:5px 0;color:var(--muted);font-size:12px}.meta span:last-child{color:#34435c;text-align:right}.download-card .btn{width:100%}
.feature-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}.feature{padding:25px 20px;border:1px solid var(--line);border-radius:20px;background:#fff;transition:.2s}.feature:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.feature-icon{width:50px;height:50px;display:grid;place-items:center;margin-bottom:18px;color:var(--blue);background:#e8f4ff;border-radius:16px;font-size:21px;font-weight:900}.feature:nth-child(2) .feature-icon{color:#7455d8;background:#f0ebff}.feature:nth-child(3) .feature-icon{color:#0e9d71;background:#e4f9f2}.feature:nth-child(4) .feature-icon{color:#ce7e0a;background:#fff3dd}.feature:nth-child(5) .feature-icon{color:#d84f70;background:#ffedf2}.feature h3{margin:0 0 7px;font-size:17px}.feature p{margin:0;color:var(--muted);font-size:13px}
.split{display:grid;grid-template-columns:1fr 1.05fr;align-items:center;gap:68px}.points{display:grid;gap:14px;margin:28px 0}.point{display:flex;gap:11px}.check{flex:0 0 24px;height:24px;display:grid;place-items:center;color:#fff;background:var(--blue);border-radius:8px;font-size:12px}.product{position:relative}.product>img{width:100%;border-radius:24px;box-shadow:var(--shadow)}.product-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:11px 18px 0}.product-strip img{height:82px;width:100%;object-fit:cover;border-radius:11px;box-shadow:0 8px 20px rgba(13,52,103,.12)}
.message-flow{display:grid;grid-template-columns:1.1fr .9fr;gap:23px}.message-main{position:relative;overflow:hidden;border-radius:24px}.message-main img{width:100%;height:100%;min-height:420px;object-fit:cover}.message-main div{position:absolute;inset:auto 0 0;padding:75px 28px 25px;color:#fff;background:linear-gradient(transparent,rgba(2,16,39,.9))}.message-main h3{margin:3px 0;font-size:24px}.message-main p{margin:0;color:#d7e8fb}.message-side{display:grid;gap:14px}.message-side article{display:flex;align-items:center;gap:15px;padding:20px;border:1px solid rgba(102,186,255,.18);border-radius:18px;background:#0b264f}.avatar{width:43px;height:43px;display:grid;place-items:center;flex:0 0 43px;color:#fff;background:linear-gradient(145deg,#32c8ff,#1478ff);border-radius:14px;font-weight:900}.message-side h3{margin:0 0 2px;font-size:15px}.message-side p{margin:0;color:#aebfda;font-size:12px}
.content-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}.news-list{display:grid;gap:13px}.news{display:grid;grid-template-columns:115px 1fr;align-items:center;overflow:hidden;border:1px solid var(--line);border-radius:17px;background:#fff}.news img{width:100%;height:100px;object-fit:cover}.news div{padding:14px 17px}.news small{color:var(--blue);font-weight:800}.news h3{margin:2px 0;font-size:16px}.news p{margin:0;color:var(--muted);font-size:12px}.faq-list{display:grid;gap:10px}details{border:1px solid var(--line);border-radius:15px;background:#fff}summary{padding:16px 18px;cursor:pointer;list-style:none;font-size:14px;font-weight:800}summary:after{content:"+";float:right;color:var(--blue);font-size:18px}details[open] summary:after{content:"−"}details p{margin:0;padding:0 18px 17px;color:var(--muted);font-size:13px}
.cta{position:relative;overflow:hidden;padding:66px 28px;color:#fff;text-align:center;border-radius:28px;background:linear-gradient(135deg,#0870eb,#1f96ff)}.cta:before{content:"";position:absolute;width:320px;height:220px;right:-100px;top:-140px;border:1px solid rgba(255,255,255,.24);border-radius:50%}.cta h2{position:relative;margin:0 0 8px;font-size:clamp(30px,4vw,44px)}.cta p{position:relative;margin:0 0 20px;color:#dcecff}.benefits{position:relative;display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-bottom:25px;font-size:13px}.benefits span:before{content:"✓";margin-right:6px}.cta .actions{position:relative;justify-content:center}
.page-hero{padding:75px 0 65px;text-align:center;background:linear-gradient(180deg,#eaf5ff,#fff)}.page-hero h1{margin:14px 0 10px}.page-hero p{max-width:680px;margin:auto;color:var(--muted)}.quick-actions{justify-content:center;margin-top:25px}.tip{margin-top:24px;padding:18px 20px;border:1px solid var(--line);border-radius:15px;background:#f8fbff;color:var(--muted);font-size:13px;scroll-margin-top:90px}.help-layout{display:grid;grid-template-columns:250px 1fr;gap:38px;align-items:start}.help-nav{position:sticky;top:94px;padding:16px;border:1px solid var(--line);border-radius:17px;background:#fff}.help-nav strong{display:block;padding:8px 10px 12px}.help-nav a{display:block;padding:9px 10px;color:var(--muted);border-radius:9px;font-size:13px}.help-nav a:hover{color:var(--blue);background:#ebf5ff}.faq-section{margin-bottom:35px;scroll-margin-top:95px}.faq-section h2{font-size:25px}.search{display:flex;max-width:640px;margin:24px auto 0;padding:7px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow)}.search input{flex:1;min-width:0;padding:0 13px;border:0;outline:0}
.footer{padding:50px 0 24px;color:#a8bad3;background:#06162f}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:45px}.footer .brand{color:#fff}.footer p{max-width:330px;font-size:13px}.footer-col strong{display:block;margin-bottom:12px;color:#fff}.footer-col a{display:block;margin:7px 0;font-size:13px}.footer-col a:hover{color:#fff}.copyright{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:12px}
@media(max-width:950px){.nav-links{display:none}.nav>.btn{margin-left:auto}.hero-grid,.split,.message-flow,.content-grid{grid-template-columns:1fr}.download-grid{grid-template-columns:repeat(2,1fr)}.feature-grid{grid-template-columns:repeat(3,1fr)}.help-layout{grid-template-columns:1fr}.help-nav{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.container{width:min(100% - 28px,1180px)}.header{height:64px}.nav>.btn{min-height:38px;padding:0 12px;font-size:12px}.hero{padding:62px 0}h1{font-size:39px}.section{padding:66px 0}.download-grid,.feature-grid{grid-template-columns:1fr}.trust-inner{align-items:flex-start;flex-direction:column}.brands{justify-content:flex-start;gap:16px}.news{grid-template-columns:90px 1fr}.footer-grid{grid-template-columns:1fr}.bubble.one{left:7px}.bubble.two{right:7px}.cta{padding:50px 18px}}