:root{--blue:#3a81ec;--text:#333;--muted:#666;--surface:#f9faff;--gradient:linear-gradient(100deg,#5baffd,#3a81ec)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--surface);color:var(--text);font:16px/1.75 "Microsoft YaHei","PingFang SC",Arial,sans-serif}a{color:inherit;text-decoration:none}button,summary,a{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid #3a81ec;outline-offset:5px}img{display:block;max-width:100%;height:auto}h1,h2,h3,h4,p{margin:0}.container{width:calc(100% - 48px);max-width:1200px;margin-inline:auto}[hidden]{display:none!important}.skip-link{position:fixed;left:16px;top:-100px;z-index:50;padding:8px 20px;background:white;color:var(--blue);border-radius:8px}.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(249,250,255,.97)}.header-inner{height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;min-width:0;max-width:40%}.brand strong{font-size:25px;line-height:1.3;overflow-wrap:anywhere}.logo{display:flex;align-items:center;justify-content:center;flex:0 0 auto;min-width:42px;height:44px;color:var(--blue);font-size:32px;font-weight:700}.logo img{width:auto;max-width:130px;max-height:44px;object-fit:contain}.desktop-nav{display:flex;align-items:center;gap:14px;white-space:nowrap}.nav-item{display:flex;align-items:center;justify-content:center;min-width:110px;min-height:44px;padding:7px 20px;color:#3c4d86;border-radius:28px}.nav-item:hover{color:#1b67da}.nav-item.active{background:var(--gradient);box-shadow:0 6px 10px #96c0fc80;color:#fff}.nav-auth{display:flex;align-items:center;justify-content:center;min-width:80px;min-height:44px;padding:7px 22px;color:white;border-radius:28px}.login{background:linear-gradient(100deg,#ff6b38,#ff235b)}.register{background:linear-gradient(100deg,#ffab00,#ffc000)}.nav-auth:hover,.button:hover{filter:brightness(1.04)}.mobile-menu{display:none;position:relative}.mobile-menu summary{list-style:none;width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;gap:6px;align-items:center;cursor:pointer}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary span{width:23px;height:2px;background:#3c4d86;border-radius:2px}.mobile-menu nav{position:absolute;right:0;top:52px;min-width:190px;padding:10px;background:#fff;box-shadow:0 8px 35px #a8bce74d;border-radius:12px}.mobile-menu nav a{display:block;padding:10px 18px;border-radius:8px;color:#3c4d86}.mobile-menu nav a:hover,.mobile-menu nav a[aria-current]{background:#edf4ff;color:var(--blue)}
.button{display:inline-flex;align-items:center;justify-content:center;min-width:180px;min-height:44px;padding:9px 26px;border-radius:28px;color:white;text-align:center;font-size:16px;line-height:1.5}.primary{background:var(--gradient);box-shadow:0 5px 9px #96c0fc80}.hero{overflow:hidden}.hero-inner{position:relative;min-height:510px;display:flex;align-items:center}.hero-copy{position:relative;z-index:1;width:49%;padding-bottom:15px}.hero h1{font-size:36px;line-height:1.35;margin-bottom:22px;overflow-wrap:anywhere}.hero p{font-size:17px;line-height:2;max-width:580px}.hero .button{margin-top:28px}.hero-art{position:absolute;right:-7%;top:0;width:78%;max-width:none;height:100%;object-fit:contain;object-position:right center;pointer-events:none}
.section{padding-top:75px}.section-heading{text-align:center;margin-bottom:48px}.section-heading h2{font-size:28px;font-weight:500;line-height:1.5}.section-heading>p{font-size:12px;letter-spacing:1px;margin-top:4px}.section-heading>span{display:block;width:58px;height:3px;border-radius:2px;background:#333;margin:18px auto 0}.services-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}.service-item{display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px 15px;gap:24px;border-left:1px solid #dedee0;min-width:0}.service-item:first-child{border-left:0}.service-item img{height:52px;width:56px;object-fit:contain}.service-item h3{font-size:16px;font-weight:400;overflow-wrap:anywhere}.channels-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:20px}.channels-grid img{width:100%;height:72px;object-fit:contain;background:#fff;border-radius:6px;padding:14px;box-shadow:0 3px 8px #96c0fc66}.section-note{font-size:13px;color:#7b8493;text-align:center;margin-top:20px}.fee-feature{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:0 36px 35px}.fee-feature h3{font-size:23px}.fee-row{display:flex;align-items:center;gap:24px;margin-top:32px}.letter-mark{display:flex;flex:0 0 58px;width:58px;height:58px;justify-content:center;align-items:center;background:var(--gradient);color:white;border-radius:50%;font-weight:bold;font-size:28px;box-shadow:0 6px 12px #96c0fc66}.fee-row h4{font-weight:400;font-size:20px;color:#2786f9}.fee-row p{font-size:15px;margin-top:5px}.fee-feature>img{width:100%;max-width:463px;margin:auto}.features-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px 26px}.feature-card{padding:28px 22px;background:white;text-align:center;border-radius:8px;min-width:0}.feature-card img{width:34px;height:30px;object-fit:contain;margin:0 auto 20px}.feature-card h3{font-size:20px;margin-bottom:10px}.feature-card p{font-size:14px;color:#9298a0;line-height:1.7}.section-action{text-align:center;margin-top:38px}.wide-button{min-width:260px;border:6px solid #afd3fc;background-clip:padding-box;box-shadow:none;min-height:60px}.advantages{padding-top:85px}.advantage{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:100px;margin-top:60px;padding:0 45px}.advantage.reverse .advantage-copy{order:2}.advantage.reverse>img{order:1}.advantage-copy h3{font-size:27px;font-weight:600;margin-bottom:20px}.advantage-copy p{font-size:16px;color:#666;line-height:2}.advantage-copy .button{margin-top:26px}.advantage>img{width:100%;max-width:432px;margin:auto}
.help-page{padding-top:36px;min-height:calc(100svh - 190px)}.help-page>h1{font-size:26px;font-weight:500;text-align:center;line-height:1.5;margin-bottom:10px}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 50px;padding:25px}.faq-item{min-width:0;background:white;border-radius:8px;box-shadow:0 0 10px #c5d7ff8c;align-self:start}.faq-item summary{list-style:none;display:flex;align-items:center;gap:18px;min-height:58px;padding:13px 25px;cursor:pointer;font-size:18px;font-weight:600;line-height:32px;overflow-wrap:anywhere}.faq-item summary::-webkit-details-marker{display:none}.question-mark,.answer-mark{flex:0 0 32px;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font:700 22px/1 Arial,sans-serif}.question-mark{background:var(--gradient);box-shadow:0 6px 10px #96c0fc80;color:white}.faq-answer{display:flex;gap:18px;align-items:flex-start;padding:6px 25px 22px;font-size:15px;color:#666;line-height:1.9}.answer-mark{color:var(--blue);background:#eff5ff;font-size:20px}.faq-answer p{min-width:0}.faq-answer a{color:var(--blue);display:inline-block;margin-left:5px}.faq-answer a:hover{text-decoration:underline}.site-footer{text-align:center;padding:70px 24px 28px;font-size:16px;color:#666}.icp{font-size:13px;margin-top:8px}.icp:empty{display:none}.site-footer a:hover{color:var(--blue)}
@media(min-width:1600px){.hero-art{width:82%;right:-10%;top:0}.hero-inner{min-height:560px}}
@media(max-width:1050px){.container{width:calc(100% - 40px)}.brand strong{font-size:22px}.desktop-nav{gap:8px}.nav-item{min-width:85px;padding-inline:12px}.nav-auth{min-width:65px;padding-inline:16px}.hero-inner{min-height:430px}.hero h1{font-size:31px}.hero p{font-size:15px}.hero-art{top:0}.section{padding-top:65px}.features-grid{gap:18px;grid-template-columns:repeat(2,minmax(0,1fr))}.channels-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.fee-feature{gap:25px;padding-inline:15px}.advantage{gap:45px;padding-inline:15px}.faq-grid{gap:22px 28px;padding-inline:0}.faq-item summary{font-size:16px;padding-inline:20px;gap:14px}.faq-answer{padding-inline:20px;gap:14px}}
@media(max-width:760px){html{scroll-padding-top:84px}.container{width:calc(100% - 32px)}.header-inner{height:70px}.brand{max-width:calc(100% - 66px)}.brand strong{font-size:22px}.logo,.logo img{max-height:38px}.desktop-nav{display:none}.mobile-menu{display:block}.hero-inner{min-height:0;display:flex;flex-direction:column;align-items:stretch;padding-top:42px}.hero-copy{width:100%;padding-bottom:0}.hero h1{font-size:32px;margin-bottom:16px}.hero p{font-size:16px;line-height:1.9}.desktop-break{display:none}.hero .button{margin-top:24px}.hero-copy>.button,.advantage-copy>.button{display:flex;width:180px;max-width:100%;margin-left:auto;margin-right:auto;}.hero-art{position:relative;right:auto;top:auto;width:100%;height:auto;max-width:540px;align-self:center;margin:18px 0 -8px}.section{padding-top:48px}.section-heading{margin-bottom:28px}.section-heading h2{font-size:25px}.section-heading>p{font-size:11px}.services-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 0}.service-item{padding:12px;gap:16px}.service-item:nth-child(odd){border-left:0}.service-item h3{font-size:14px}.channels-grid{gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}.channels-grid img{height:65px}.fee-feature{grid-template-columns:1fr;padding:0 5px 25px;gap:26px}.fee-feature h3{font-size:21px}.fee-feature>img{max-width:350px}.fee-row{gap:18px;margin-top:24px}.letter-mark{width:48px;height:48px;flex-basis:48px;font-size:25px}.fee-row h4{font-size:18px}.features-grid{gap:14px}.feature-card{padding:24px 16px}.feature-card h3{font-size:18px}.feature-card p{font-size:14px}.advantage{grid-template-columns:1fr;gap:25px;padding:0 5px;margin-top:40px}.advantage.reverse .advantage-copy,.advantage.reverse>img{order:initial}.advantage-copy h3{font-size:24px;margin-bottom:12px}.advantage-copy .button{margin-top:20px}.advantage>img{max-width:350px}.help-page{padding-top:28px}.help-page>h1{font-size:24px;margin-bottom:8px}.faq-grid{grid-template-columns:1fr;gap:20px;padding:20px 0}.faq-item summary{min-height:64px;line-height:1.65;padding:15px 18px;font-size:16px;gap:15px}.faq-answer{padding:3px 18px 20px;gap:15px;font-size:14px}.question-mark,.answer-mark{flex-basis:30px;width:30px;height:30px;font-size:20px}.site-footer{padding:45px 16px 22px;font-size:14px}}
@media(max-width:359px){.brand strong{font-size:20px}.features-grid{grid-template-columns:1fr}.hero h1{font-size:29px}.faq-item summary{padding-inline:14px;gap:12px}.faq-answer{padding-inline:14px;gap:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}