:root{--bg:#351078;--ink:#fff;--muted:#cfc2e8;--accent:#adf1ff;--line:#ffffff25;--header:84px;color-scheme:dark;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:16px;line-height:1.7;scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 24px)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{font:inherit;cursor:pointer}a{color:inherit;text-underline-offset:5px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}h1,h2,h3,p{margin:0}img{display:block;max-width:100%;height:auto}button[hidden],a[hidden]{display:none}.shell{width:min(1200px,calc(100% - 96px));margin:auto}.skip-link{position:fixed;top:8px;left:8px;z-index:2147483000;transform:translateY(-150%);padding:8px 16px;background:#fff;color:#28114e}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:100;background:#2e125fee;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.header-inner{min-height:var(--header);display:flex;align-items:center;gap:56px}.brand{display:block;flex:none;width:190px;text-decoration:none}.brand-image{display:block;width:100%;height:auto}.header-inner nav{display:flex;gap:32px}.header-inner nav a{font-size:15px;text-decoration:none;color:#e4dbf6;padding:10px 0;border-bottom:2px solid transparent;transition:color 150ms ease,border-color 150ms ease}.header-inner nav a[aria-current]{color:#fff;border-color:var(--accent)}
.hero{overflow:hidden;background:radial-gradient(ellipse at 65% 12%,#357af2 0,transparent 65%),radial-gradient(ellipse at 10% 95%,#5909d5 0,transparent 70%),#4c29cf}.hero-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px;padding-block:64px 72px;min-height:700px}.hero-copy{position:relative;z-index:1}.hero-eyebrow{color:#e0d6ff;font-size:17px;letter-spacing:.12em;margin-bottom:18px}.hero h1{font-size:clamp(48px,5vw,72px);font-weight:750;line-height:1.14;letter-spacing:.025em}.hero-description{font-size:19px;line-height:1.8;color:#f0eaff;margin-top:24px}.hero-downloads{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:32px;max-width:460px}.download-button{display:flex;align-items:center;gap:10px;justify-content:flex-start;min-height:64px;border:1px solid #ffffff6b;border-radius:8px;padding:12px 14px;background:#ffffff;color:#341362;text-align:left;transition:background 150ms ease,border-color 150ms ease,box-shadow 150ms ease}.download-button img{width:28px;height:28px;object-fit:contain}.download-button strong{font-size:16px;font-weight:650;white-space:nowrap}.download-arrow{margin-left:auto;font-size:21px;line-height:1}.download-button[aria-busy=true]{cursor:progress;border-color:var(--accent);box-shadow:0 0 0 4px #adf1ff45}.download-button[aria-busy=true] .download-arrow{font-size:0}.download-button[aria-busy=true] .download-arrow:after{content:'…';font-size:22px}.text-link{display:inline-block;color:var(--accent);font-size:15px;font-weight:550}.hero-help{margin-top:20px;padding:6px 0}.hero-scene{width:calc(100% + 60px);max-width:none;margin-left:-16px;mask-image:radial-gradient(ellipse at center,#000 55%,transparent 72%)}
.section{padding:88px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:48px}.section-heading h2,.help h2{font-size:clamp(30px,3.1vw,42px);line-height:1.35;font-weight:680;letter-spacing:.02em}.section-heading p{color:var(--muted);font-size:16px;margin-top:14px}.features{background:#360674;padding-bottom:40px}.features .section-heading{margin-bottom:12px}.feature-row{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px;padding-block:36px;min-height:350px;border-bottom:1px solid var(--line)}.feature-row:last-child{border-bottom:0}.feature-copy{padding-inline:24px}.feature-copy h3{font-size:30px;line-height:1.45;font-weight:650;max-width:380px}.feature-copy p{font-size:17px;color:#ddd0f2;max-width:430px;margin-top:20px}.feature-art{width:100%;mask-image:radial-gradient(ellipse at center,#000 48%,transparent 75%)}.reverse .feature-copy{order:2}.reverse .feature-art{order:1}
.getting-started{background:#ece8fb;color:#291647}.getting-started .section-heading p{color:#655979}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px;list-style:none;padding:0;margin:0}.steps li{border-top:1px solid #bfb3d7;padding-top:28px}.steps li>span{font-size:18px;font-weight:700;color:#7659b3}.steps h3{font-size:23px;margin:14px 0}.steps p{color:#655979}.steps .text-link{color:#573a96;margin-top:20px}
.help{background:#2a1059}.help-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:100px}.help-inner>div>p{color:var(--muted);margin-top:20px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list details:first-child{border-top:1px solid var(--line)}.faq-list summary{list-style:none;padding:24px 38px 24px 0;font-size:17px;font-weight:600;position:relative;cursor:pointer}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';position:absolute;right:4px;top:24px;color:var(--accent);transition:transform 150ms ease}.faq-list details[open] summary:after{transform:rotate(45deg)}.answer{padding:0 32px 24px 0;color:var(--muted)}.answer p+p{margin-top:12px}.answer a{margin-top:16px}details{scroll-margin-top:calc(var(--header) + 24px)}
.download-section{background:linear-gradient(110deg,#4930a7,#4b147e)}.download-section .section-heading{margin-bottom:32px}.download-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.download-tile{min-height:112px;padding:24px 20px;gap:14px}.download-tile img{width:34px;height:34px}.download-tile small{display:block;font-size:12px;color:#75658c;font-weight:400;margin-top:6px}.download-help{margin-top:24px}
.site-footer{padding:44px 0 100px;background:#22113f}.footer-inner{display:flex;justify-content:space-between;gap:40px}.footer-inner strong{font-size:21px}.footer-inner p{color:#b9aaca;font-size:13px;margin-top:12px}.footer-inner nav{display:flex;gap:24px;margin-top:12px;font-size:14px}.back-top{position:fixed;left:20px;bottom:20px;z-index:100;display:flex;align-items:center;gap:8px;background:#251042e8;color:#fff;border:1px solid #9f87be;padding:8px 12px;border-radius:6px;text-decoration:none;font-size:14px}.vac-float{position:fixed;right:20px;bottom:calc(20px + var(--vac-chat-bottom,0px));z-index:2147482999;display:flex;flex-direction:column;align-items:center;gap:16px}.vac-chat{display:none;position:relative;align-items:center;justify-content:center;width:60px;height:60px;border:1px solid #9b85ff;border-radius:50%;background:#5d40ce;color:#fff;box-shadow:0 6px 20px #10052740}:root[data-vac-chat=ready] .vac-chat{display:flex}.vac-chat svg{width:28px;height:28px}.vac-chat-unread{position:absolute;right:-2px;top:-2px;min-width:20px;padding:0 5px;border-radius:20px;background:#e63879;color:#fff;font:600 12px/20px system-ui}.vac-chat-unread:empty{display:none}
@media(hover:hover) and (pointer:fine){.header-inner nav a:hover{color:#fff;border-color:var(--accent)}.download-button:hover{background:#e9faff;border-color:#adf1ff;box-shadow:0 6px 20px #16054030}.text-link:hover,.footer-inner a:hover{color:#fff}.getting-started .text-link:hover{color:#321861}.vac-chat:hover{background:#7554eb}.faq-list summary:hover{color:var(--accent)}}
.hero-downloads .download-button{min-width:0}
@media(max-width:1050px){.hero-downloads .download-arrow{display:none}.shell{width:calc(100% - 64px)}.header-inner{gap:36px}.hero-inner{gap:12px;min-height:640px;padding-block:56px}.hero h1{font-size:60px}.hero-description{font-size:17px}.hero-downloads{gap:10px}.download-button{padding:12px 10px;gap:8px}.download-button strong{font-size:14px}.download-button img{width:24px;height:24px}.hero-scene{width:calc(100% + 40px);margin:0}.feature-row{gap:24px;min-height:310px}.feature-copy{padding:0}.feature-copy h3{font-size:27px}.help-inner{gap:48px}.download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.download-tile{min-height:96px;padding:20px}.steps{gap:28px}.section-heading{align-items:start;flex-direction:column;gap:0}}
@media(max-width:700px){:root{--header:112px}.shell{width:calc(100% - 40px)}.header-inner{min-height:112px;padding-block:12px;flex-wrap:wrap;gap:4px}.brand{width:164px}.header-inner nav{width:100%;gap:26px}.header-inner nav a{padding:5px 0;font-size:14px}.hero-inner{display:flex;flex-direction:column;gap:0;padding-top:40px;padding-bottom:16px;min-height:0}.hero-copy{width:100%}.hero-eyebrow{font-size:14px;margin-bottom:16px}.hero h1{font-size:52px;line-height:1.12}.hero-description{font-size:16px;margin-top:20px;max-width:320px}.desktop-break{display:none}.hero-downloads{margin-top:24px;max-width:none;gap:10px}.download-button{min-height:58px;padding:12px 10px}.download-button strong{font-size:14px}.download-arrow{font-size:18px}.hero-help{margin-top:14px;font-size:14px}.hero-scene{width:min(100%,400px);margin:-6px 0 0;max-height:360px}.section{padding:56px 0}.section-heading{margin-bottom:28px}.section-heading h2,.help h2{font-size:30px}.section-heading p{font-size:15px}.features .section-heading{margin-bottom:20px}.feature-row{display:flex;flex-direction:column;gap:0;padding:28px 0;min-height:0}.feature-copy,.reverse .feature-copy{order:0;width:100%}.feature-copy h3{font-size:25px;max-width:330px}.feature-copy p{font-size:16px;margin-top:14px}.feature-art,.reverse .feature-art{order:1;width:min(100%,460px);max-height:220px;object-fit:contain;margin-top:8px}.steps{grid-template-columns:1fr;gap:28px}.steps li{position:relative;padding:22px 0 0 44px}.steps li>span{position:absolute;left:0;top:22px}.steps h3{margin:0 0 12px;font-size:21px}.steps .text-link{margin-top:14px}.help-inner{grid-template-columns:1fr;gap:28px}.help h2 br{display:none}.help-inner>div>p{margin-top:14px}.faq-list summary{font-size:16px;padding-block:22px}.faq-list summary:after{top:22px}.answer{font-size:15px;padding-right:12px}.download-grid{gap:12px}.download-tile{padding:16px 12px;min-height:112px;flex-wrap:wrap;align-items:flex-start;gap:8px}.download-tile img{width:26px;height:26px}.download-tile>span:not(.download-arrow){width:100%;order:2}.download-tile .download-arrow{order:1}.download-tile small{font-size:11px}.footer-inner{display:grid;gap:20px}.footer-inner p{margin-top:8px}.site-footer{padding-bottom:110px}.back-top{left:12px;bottom:16px}.vac-float{right:16px}.vac-chat{width:56px;height:56px}}
@media(max-width:360px){.shell{width:calc(100% - 32px)}.hero h1{font-size:46px}.hero-downloads{gap:8px}.download-button strong{font-size:13px}.hero-downloads .download-button img{width:20px;height:20px}.hero-downloads .download-arrow{display:none}.header-inner nav{gap:22px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Space accents keep the original artwork and leave download targets stationary. */
.hero-highlight{position:relative;display:inline-block;color:#c6f6ff}.hero-highlight:after{content:"";position:absolute;left:1%;right:2%;bottom:-.1em;height:6px;border-radius:50%;background:#a9eaff;transform:rotate(-3deg);opacity:.65}
.hero-art{position:relative;min-width:0;isolation:isolate}.hero-art .hero-scene{position:relative;display:block;z-index:1;animation:space-float 9s ease-in-out infinite;animation-play-state:paused;pointer-events:none}.space-orbit{position:absolute;width:110%;height:110%;left:-5%;top:-5%;fill:none;stroke:#c1eaff;stroke-width:1;opacity:.4;pointer-events:none}.space-orbit path{stroke-width:2}.space-orbit circle{fill:#d8f7ff;stroke:none}.space-spark{position:absolute;z-index:2;width:5px;height:5px;border-radius:50%;background:#d2f8ff;box-shadow:0 0 12px #c0f5ff80;pointer-events:none;animation:space-glow 5s ease-in-out infinite;animation-play-state:paused}.spark-one{top:20%;left:15%}.spark-two{top:32%;right:5%;animation-delay:-2s}.spark-three{bottom:18%;left:28%;animation-delay:-3s}
.hero-art[data-motion=running] .hero-scene,.hero-art[data-motion=running] .space-spark{animation-play-state:running}.motion-toggle{position:relative;z-index:3;display:block;margin:2px auto 0;min-height:44px;padding:8px 16px;border:1px solid #ffffff45;border-radius:24px;background:#32187c66;color:#f0eaff;font-size:12px;letter-spacing:.04em}.motion-toggle:before{content:"Ⅱ";display:inline-block;width:16px;margin-right:6px}.hero-art[data-motion=paused] .motion-toggle:before{content:"▷"}
.download-button img,.download-arrow,.feature-art{transition:transform 140ms cubic-bezier(.22,1,.36,1)}
@keyframes space-float{0%,100%{transform:translateY(0) rotate(-.5deg)}50%{transform:translateY(-12px) rotate(.5deg)}}
@keyframes space-glow{0%,100%{opacity:.35;transform:scale(.8)}50%{opacity:.85;transform:scale(1.15)}}
@media(hover:hover) and (pointer:fine){.download-button:not([aria-busy=true]):hover img{transform:translateY(-3px) rotate(-5deg)}.download-button:not([aria-busy=true]):hover .download-arrow{transform:translate(2px,-2px)}.feature-row:hover .feature-art{transform:translateY(-5px) rotate(-.6deg)}.motion-toggle:hover{background:#351473}}
.download-button:active img{transform:scale(.97);transition-duration:0s}
@media(max-width:700px){.hero-art{width:min(100%,400px);margin:12px auto 8px}.hero-art .hero-scene{width:100%;margin:0}.space-orbit{width:100%;height:100%;left:0;top:0}.hero-highlight:after{height:4px}.motion-toggle{margin-top:0}}
@media(prefers-reduced-motion:reduce){.hero-art .hero-scene,.space-spark{animation:none!important}.download-button img,.download-arrow,.feature-art{transform:none!important}}