:root{--bg:#f4f7ff;--ink:#1e2a44;--muted:#65728b;--blue:#486fe5;--deep:#304fbd;--cyan:#41bfc9;--green:#3db57b;--purple:#8b6bd5;--orange:#c67a16;--white:#fff;--line:#d8deeb;--shadow:0 20px 55px rgba(54,73,119,.13)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;margin:0;color:var(--ink);background:var(--bg);font-family:"Segoe UI","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.72;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}img{display:block;max-width:100%;height:auto}:focus-visible{outline:4px solid #f69a2e;outline-offset:3px}
.skip-link{position:fixed;top:10px;left:10px;z-index:10000;padding:10px 15px;color:#fff;background:#1e2a44;transform:translateY(-150%)}.skip-link:focus{transform:none}.scroll-progress{position:fixed;top:0;left:0;z-index:9999;width:0;height:4px;background:linear-gradient(90deg,var(--green),var(--cyan),var(--blue))}
.page{position:relative;isolation:isolate;overflow:hidden}.fluid-bg{position:fixed;inset:0;z-index:-3;background:radial-gradient(circle at 13% 10%,rgba(65,191,201,.18),transparent 27%),radial-gradient(circle at 87% 21%,rgba(72,111,229,.14),transparent 29%),linear-gradient(145deg,#f8fbff,#eff3ff 50%,#f6f2ff)}.fluid-bg:before{content:"";position:absolute;left:0;right:0;top:180px;height:4px;background:linear-gradient(90deg,transparent 6%,rgba(61,181,123,.18) 6% 28%,rgba(65,191,201,.18) 28% 53%,rgba(72,111,229,.18) 53% 77%,transparent 77%)}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.nav-wrap{position:sticky;top:0;z-index:100;border-bottom:1px solid #d2d9e6;background:rgba(249,251,255,.92);backdrop-filter:blur(16px)}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:900;white-space:nowrap}.logo{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;color:#fff;background:linear-gradient(145deg,#5c80ea,#375fcf);box-shadow:0 10px 24px rgba(58,85,163,.21);font-weight:950}.nav-links{display:flex;align-items:center;gap:27px;color:#47546d;font-size:14px;font-weight:750}.nav-links a{padding:8px 1px;border-bottom:3px solid transparent}.nav-links a:hover,.nav-links a.active{color:var(--deep);border-color:var(--blue)}.nav-actions{display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:49px;padding:0 23px;border:1px solid transparent;border-radius:11px;font-weight:850;cursor:pointer;transition:.24s}.btn-primary{color:#fff;background:linear-gradient(145deg,#587ee8,#385fce);box-shadow:0 12px 28px rgba(58,85,163,.21)}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 17px 35px rgba(58,85,163,.3)}.btn-ghost{color:var(--deep);border-color:#bac7e0;background:#fff}.btn-ghost:hover{border-color:var(--blue);background:#edf2ff}.menu-btn{display:none;width:46px;height:46px;border:1px solid #c4cede;border-radius:11px;color:var(--deep);background:#fff;font-size:21px}
.hero{min-height:745px;display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:72px;padding:96px 0 86px}.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:7px 13px;border:1px solid #b6d8da;border-radius:999px;color:#31686d;background:#effcfc;font-size:13px;font-weight:800}.pulse{width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 0 6px rgba(61,181,123,.1)}h1{margin:23px 0;font-size:clamp(46px,6.3vw,78px);line-height:1.04;letter-spacing:-.052em}.gradient-text{color:var(--blue)}.lead{max-width:670px;color:var(--muted);font-size:18px}.hero-actions{display:flex;flex-wrap:wrap;gap:13px;margin:31px 0 29px}.platforms{display:flex;flex-wrap:wrap;gap:9px;color:#4b5871;font-size:13px}.platforms span{padding:7px 11px;border:1px solid #ced6e4;border-radius:8px;background:#fff;box-shadow:0 5px 13px rgba(53,70,101,.06)}
.visual{position:relative}.visual:before{content:"";position:absolute;inset:-8%;z-index:-1;border-radius:50%;background:radial-gradient(circle,rgba(65,191,201,.2),transparent 67%);filter:blur(24px)}.visual-card{position:relative;padding:25px;border:1px solid #c3cede;border-radius:22px;background:#fff;box-shadow:0 25px 60px rgba(45,62,102,.16);overflow:hidden}.visual-card:before{content:"欢迎使用快连";position:absolute;top:0;left:0;right:0;height:36px;padding:8px 15px;color:#62718a;background:#f4f7fb;border-bottom:1px solid #d9e0e9;font-size:11px;font-weight:700}.visual-card img{margin-top:22px;filter:drop-shadow(0 27px 25px rgba(51,66,115,.15))}.start-guide{position:absolute;right:-22px;top:34px;z-index:3;width:218px;padding:18px;border:1px solid #bdc9dd;border-radius:13px;background:#fff;box-shadow:0 18px 44px rgba(41,58,94,.16)}.start-guide>span{display:block;color:var(--deep);font-size:13px;font-weight:850}.start-guide ol{display:grid;gap:8px;margin:14px 0;padding:0;list-style:none;counter-reset:steps}.start-guide li{position:relative;padding-left:31px;color:#526078;font-size:12px;counter-increment:steps}.start-guide li:before{content:counter(steps);position:absolute;left:0;top:0;width:21px;height:21px;display:grid;place-items:center;border:1px solid #c4cedd;border-radius:50%;color:#6e7c91;background:#f3f6fa;font-size:10px;font-weight:800}.start-guide li:after{content:"";position:absolute;left:10px;top:21px;width:1px;height:10px;background:#cbd4df}.start-guide li:last-child:after{display:none}.start-guide li.done:before{content:"✓";color:#fff;border-color:var(--green);background:var(--green)}.start-guide small{display:block;padding-top:9px;border-top:1px solid #e1e6ed;color:var(--muted);font-size:10px}.connection{position:absolute;left:-25px;bottom:29px;z-index:2;padding:14px 18px;border:1px solid #add4bd;border-radius:10px;background:#f0fbf5;box-shadow:0 15px 34px rgba(44,85,63,.1);font-size:13px;font-weight:800}.connection b{color:#267650}
.stats{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid #cad3df;border-radius:16px;background:#fff;box-shadow:var(--shadow);overflow:hidden}.stat{position:relative;padding:29px 15px;text-align:center;border-right:1px solid #dae0e8}.stat:last-child{border:0}.stat:before{content:"";display:block;width:28px;height:28px;margin:0 auto 8px;border:7px solid var(--tone,var(--cyan));border-radius:50%;border-right-color:#edf0f5}.stat:nth-child(2){--tone:var(--blue)}.stat:nth-child(3){--tone:var(--purple)}.stat:nth-child(4){--tone:var(--green)}.stat:nth-child(5){--tone:#d29a3c}.stat strong{display:block;color:var(--deep);font-size:27px}.stat span{color:var(--muted);font-size:13px}
section{position:relative;padding:108px 0;scroll-margin-top:70px}main>section:nth-of-type(odd){background:rgba(255,255,255,.42)}.section-head{max-width:730px;margin:0 auto 53px;text-align:center}.section-head.left{margin-left:0;text-align:left}.kicker{color:var(--deep);font-size:12px;font-weight:900;letter-spacing:.16em;text-transform:uppercase}h2{margin:11px 0 16px;font-size:clamp(34px,4.3vw,52px);line-height:1.14;letter-spacing:-.037em}.section-head p,.muted{color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;counter-reset:features}.feature{position:relative;min-height:260px;padding:35px;border:1px solid #cbd4e0;border-radius:16px;background:#fff;box-shadow:var(--shadow);overflow:hidden;transition:.3s;counter-increment:features}.feature:hover{transform:translateY(-6px);border-color:#90a7d8}.feature:before{content:"0" counter(features);position:absolute;top:22px;right:25px;color:#d5ddea;font:900 32px/1 Consolas,monospace}.feature:after{content:"";position:absolute;left:0;bottom:0;width:100%;height:5px;background:var(--glow,var(--blue));opacity:.65}.icon{width:54px;height:54px;display:grid;place-items:center;margin-bottom:25px;border-radius:12px;color:#fff;background:linear-gradient(145deg,#577de5,#385fca);box-shadow:0 10px 22px rgba(57,84,160,.17);font-size:24px}.feature h3{margin:0 0 9px;font-size:23px}.feature p{color:var(--muted)}
.split{display:grid;grid-template-columns:.92fr 1.08fr;align-items:center;gap:82px}.art-panel{position:relative;padding:36px;border:1px solid #cbd4e0;border-radius:18px;background:#fff;box-shadow:var(--shadow);overflow:hidden}.art-panel:after{content:"安全连接指南";position:absolute;left:20px;bottom:17px;padding:5px 9px;border-radius:5px;color:#276f4c;background:#eaf8f0;font-size:10px;font-weight:800}.art-panel img{position:relative;z-index:1;max-height:490px;margin:auto;filter:drop-shadow(0 27px 30px rgba(51,65,112,.15))}.check-list{display:grid;gap:17px;margin:28px 0}.check{display:flex;gap:13px;align-items:flex-start}.check i{display:grid;place-items:center;flex:0 0 27px;height:27px;border-radius:50%;color:#fff;background:var(--green);font-style:normal;font-weight:900;font-size:12px}
.scenarios,.reviews,.articles,.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{position:relative;padding:31px;border:1px solid #cbd4e0;border-radius:15px;background:#fff;box-shadow:var(--shadow);overflow:hidden;transition:.3s}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--green),var(--cyan),var(--blue));opacity:.55}.card:hover{transform:translateY(-6px)}.card h3{margin:14px 0 9px;font-size:21px}.card p{color:var(--muted)}.persona{display:inline-flex;padding:6px 10px;border:1px solid #c1ccdc;border-radius:7px;color:var(--deep);background:#f0f4fb;font-size:12px;font-weight:850}.quote{margin:18px 0 22px;color:var(--ink)!important}.person{display:flex;align-items:center;gap:12px}.avatar{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;color:#fff;background:linear-gradient(145deg,#567ce2,#385fc7);font-weight:900}.person small{display:block;color:var(--muted)}.stars{color:var(--orange);letter-spacing:2px}
.article{display:flex;flex-direction:column;min-height:270px}.article .meta{color:var(--deep);font-size:12px;font-weight:800}.article a{margin-top:auto;color:var(--deep);font-weight:850}.article a:hover{text-decoration:underline}.price{position:relative}.price.popular{border:2px solid var(--blue);box-shadow:0 23px 56px rgba(54,80,165,.15)}.badge{position:absolute;top:17px;right:17px;padding:5px 9px;border-radius:6px;color:#fff;background:var(--blue);font-size:11px;font-weight:900}.price-name{font-weight:850}.amount{margin:16px 0 3px;color:var(--deep);font-size:43px;font-weight:950;letter-spacing:-.05em}.amount small{font-size:14px;color:var(--muted);font-weight:600}.save{min-height:28px;color:#267650;font-size:13px;font-weight:800}.price ul{display:grid;gap:10px;margin:22px 0 26px;padding:0;list-style:none;color:#536077;font-size:14px}.price .btn{width:100%}
.faq{max-width:900px;margin:auto;padding:6px 30px;border:1px solid #cbd4e0;border-radius:16px;background:#fff;box-shadow:var(--shadow)}.faq-item{border-bottom:1px solid #d8dee7}.faq-item:last-child{border:0}.faq-item button{width:100%;display:flex;justify-content:space-between;gap:28px;padding:24px 2px;border:0;color:var(--ink);background:transparent;text-align:left;font-size:18px;font-weight:800;cursor:pointer}.faq-item button:hover{color:var(--deep)}.faq-item button span:last-child{color:var(--blue)}.faq-answer{display:none;padding:0 48px 24px 2px;color:var(--muted)}.faq-item.open .faq-answer{display:block}.faq-item.open button span:last-child{transform:rotate(45deg)}
.cta{padding:70px;border:1px solid #c9d3df;border-radius:19px;background:radial-gradient(circle at 12% 20%,rgba(61,181,123,.1),transparent 30%),radial-gradient(circle at 88% 80%,rgba(72,111,229,.1),transparent 30%),#fff;box-shadow:var(--shadow);text-align:center}.cta p{max-width:660px;margin:15px auto 27px;color:var(--muted)}
footer{padding:76px 0 32px;color:#fff;background:#1e2a44}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:42px}.footer-brand p{max-width:300px;margin-top:17px;color:#c7cedb}.footer-col h4{margin:0 0 15px}.footer-col a{display:block;margin:9px 0;color:#c7cedb;font-size:14px}.footer-col a:hover{color:#fff}.copyright{display:flex;justify-content:space-between;gap:20px;margin-top:53px;padding-top:24px;border-top:1px solid #536078;color:#a2aec0;font-size:13px}
.subhero{padding:95px 0 60px;text-align:center}.subhero h1{font-size:clamp(43px,5.6vw,68px)}.subhero .lead{margin:auto}.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.download-card{display:flex;flex-direction:column;min-height:280px}.download-card .btn{margin-top:auto}.notice{margin-top:27px;padding:18px 21px;border-left:5px solid #c38832;border-radius:8px;color:#714e10;background:#fff8e8;box-shadow:0 8px 20px rgba(102,79,37,.08);font-size:14px}
.help-layout{display:grid;grid-template-columns:270px 1fr;gap:42px;align-items:start}.help-side{position:sticky;top:100px;padding:20px;border:1px solid #cbd4e0;border-radius:14px;background:#fff;box-shadow:var(--shadow)}.help-side a{display:block;padding:10px 12px;border-radius:7px;color:var(--muted)}.help-side a:hover{color:var(--deep);background:#edf2fb}.help-content{display:grid;gap:22px}.help-block{scroll-margin-top:100px}.help-block h2{font-size:28px}.help-block ol,.help-block ul{margin:15px 0 0 22px;color:var(--muted)}.help-block li{margin:7px 0}.search{display:flex;max-width:650px;margin:28px auto 0;padding:7px;border:1px solid #c9d3df;border-radius:12px;background:#fff;box-shadow:var(--shadow)}.search input{flex:1;min-width:0;padding:0 15px;border:0;outline:0;color:var(--ink);background:transparent}
.reveal{opacity:0;transform:translateY(30px) scale(.985);transition:opacity .65s ease,transform .65s ease}.reveal.in-view{opacity:1;transform:none}
@media(max-width:900px){.nav-links{position:absolute;display:none;top:76px;left:20px;right:20px;flex-direction:column;align-items:stretch;padding:18px;border:1px solid #cbd4e0;border-radius:14px;background:#fff;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-actions .btn{display:none}.menu-btn{display:block}.hero,.split{grid-template-columns:1fr}.hero{padding-top:75px}.visual{max-width:680px}.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2n){border-right:0}.stat:last-child{grid-column:1/-1}.scenarios,.reviews,.articles,.pricing,.download-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.help-layout{grid-template-columns:1fr}.help-side{position:static}}
@media(max-width:620px){.container{width:min(100% - 28px,1180px)}.hero{min-height:auto;padding:60px 0}.hero-actions .btn{width:100%}.connection,.start-guide{position:static;margin-top:14px}.start-guide{width:100%}.visual-card{padding:40px 10px 10px}.stats,.feature-grid,.scenarios,.reviews,.articles,.pricing,.download-grid,.footer-grid{grid-template-columns:1fr}.stat,.stat:nth-child(2n){border-right:0;border-bottom:1px solid #d8dee7}.stat:last-child{grid-column:auto}.split{gap:40px}section{padding:78px 0}.cta{padding:46px 20px}.copyright{flex-direction:column}.subhero{padding:65px 0 40px}.search{flex-direction:column;gap:8px}.search input{min-height:46px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}