:root{--ink:#354052;--muted:#7d8795;--line:#e4e8ee;--paper:#fff;--ground:#f7f8fa;--blue:#5879f5;--blue-soft:#edf2ff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--ground);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}.wrap{width:min(1040px,calc(100% - 40px));margin:auto}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;color:var(--blue)}.mark{font:800 35px/1 Arial,sans-serif}.back{color:var(--muted);font-size:14px}.back:hover,.text-link:hover{color:var(--blue)}.home{min-height:100vh;display:flex;flex-direction:column}.home-main{flex:1;display:grid;place-items:center;padding:56px 0 90px}.home-intro{text-align:center;margin-bottom:62px}.v-stars{width:108px;height:48px;position:relative;margin:0 auto 26px}.v-stars:before,.v-stars:after{content:"";position:absolute;top:22px;width:54px;height:2px;background:#91a9ff}.v-stars:before{right:53px;transform:rotate(43deg);transform-origin:right}.v-stars:after{left:53px;transform:rotate(-43deg);transform-origin:left}.v-stars i{position:absolute;width:7px;height:7px;border-radius:50%;background:#6687ff;box-shadow:0 0 10px #9db0ff}.v-stars i:first-child{left:0}.v-stars i:nth-child(2){left:50px;top:43px}.v-stars i:last-child{right:0}.home h1{font-size:clamp(42px,6vw,68px);margin:0;letter-spacing:.08em;line-height:1.2}.motto{color:#8993a1;letter-spacing:.14em;margin:18px 0 0;font-size:28px;font-weight:600}.menu-grid{width:min(1040px,100%);display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.menu-card,.platform-card{display:flex;flex-direction:column;border:1px solid var(--line);background:#fff;border-radius:18px;padding:25px;min-height:145px;box-shadow:0 7px 16px rgba(37,49,67,.045);transition:.2s}.menu-card:hover,.platform-card:hover{transform:translateY(-4px);border-color:#cdd8ff;box-shadow:0 12px 24px rgba(45,69,130,.1)}.menu-card b{font-size:20px}.menu-card span{font-size:13px;color:var(--muted);margin-top:9px}.menu-card i{margin-top:auto;align-self:flex-end;color:var(--blue);font-style:normal;font-size:20px}.page-head{padding:52px 0 36px;background:#fff;border-bottom:1px solid var(--line)}.eyebrow{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em;margin:0 0 8px}.page-head h1{font-size:clamp(32px,5vw,46px);margin:0;line-height:1.25;letter-spacing:.03em}.page-head p{color:var(--muted);margin:12px 0 0}.content{padding:38px 0 80px}.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.platform-card{min-height:170px}.platform-card b{font-size:22px}.platform-card p{margin:6px 0 17px;color:var(--muted);font-size:14px}.go{margin-top:auto;color:#4768db;font-weight:650;font-size:14px}.notice{padding:18px 20px;border-left:3px solid #91a8ff;background:#f8faff;color:#5e6b7d;font-size:14px;margin-bottom:25px}.resource-bar{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 34px}.button{display:inline-flex;align-items:center;justify-content:center;padding:11px 16px;border:1px solid #d7def0;background:#fff;border-radius:10px;color:#46546a;font-size:14px;font-weight:650}.button.primary{border-color:#5879f5;background:#5879f5;color:#fff}.button:hover{border-color:#5879f5}.steps{display:grid;gap:30px}.step{display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;padding:0 0 30px;border-bottom:1px solid var(--line)}.step-no{width:48px;height:48px;display:grid;place-items:center;border-radius:14px;background:var(--blue-soft);color:#4d6de0;font-size:14px;font-weight:750}.step h2{font-size:22px;margin:4px 0 8px;line-height:1.4}.step p{margin:0 0 10px;color:#4f5b6c}.step small{display:block;color:#7d8795;line-height:1.75}.step code{display:block;overflow:auto;padding:13px 15px;background:#f3f5f8;border-radius:10px;font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;color:#344050}.step-visuals{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:17px}.step-visuals.one{grid-template-columns:minmax(0,520px)}.step-visuals img{width:100%;display:block;border:1px solid var(--line);border-radius:10px;background:#f4f6f8;max-height:480px;object-fit:contain}.plain-card{padding:26px;border:1px solid var(--line);border-radius:16px;background:#fff}.plain-card h2{margin:0 0 8px}.plain-card p{margin:0;color:var(--muted)}.footer{border-top:1px solid var(--line);padding:24px 0;color:#9099a6;font-size:13px;background:#fff}.constellation-v{display:block;overflow:visible}.constellation-v--brand{width:62px;height:42px}.constellation-v--hero{width:156px;height:98px;margin:0 auto 24px}.constellation-v .cv-line{fill:none;stroke:#9bafff;stroke-width:1.35;stroke-linecap:round;stroke-linejoin:round;opacity:.82}.constellation-v .cv-thread{stroke:#c7d2ff;stroke-width:.72;opacity:.52}.constellation-v .cv-node{fill:#6280f5;filter:drop-shadow(0 0 3px rgba(88,121,245,.75));transform-box:fill-box;transform-origin:center;animation:constellation-pulse 3.8s ease-in-out infinite}.constellation-v .cv-star{fill:#a8b9ff;opacity:.72}@keyframes constellation-pulse{0%,100%{opacity:.65;transform:scale(.85)}50%{opacity:1;transform:scale(1.18)}}@media(max-width:760px){.wrap{width:min(100% - 32px,1040px)}.home-main{padding:36px 0 54px}.home-intro{margin-bottom:38px}.menu-grid{grid-template-columns:repeat(2,1fr);gap:14px}.menu-card{min-height:130px;padding:20px}.platform-grid{grid-template-columns:1fr}.step{grid-template-columns:1fr;gap:12px}.step-no{width:44px;height:38px;border-radius:10px}.step-visuals{grid-template-columns:1fr}.page-head{padding:35px 0 27px}.content{padding-top:26px}.constellation-v--hero{width:138px;height:86px}}@media(max-width:420px){.menu-grid{grid-template-columns:1fr}.home h1{font-size:42px}.motto{font-size:20px}}
:root{}
.constellation-v--brand{width:72px;height:46px}
.constellation-v--hero{width:174px;height:128px;margin:0 auto 20px}
.constellation-v .cv-spine{fill:none;stroke:#7692f7;stroke-width:1.15;stroke-linecap:round;stroke-linejoin:miter;opacity:.38}
.constellation-v .cv-line{stroke:#8ea4f7;stroke-width:.56;stroke-linecap:round;opacity:.44}
.constellation-v .cv-node{fill:#4f73f4;filter:drop-shadow(0 0 1.8px rgba(75,111,242,.68));animation:constellation-twinkle 4.8s ease-in-out infinite}
@keyframes constellation-twinkle{0%,100%{opacity:.72}50%{opacity:1}}
@media(max-width:760px){.constellation-v--hero{width:166px;height:122px}}
.home-main{position:relative;overflow:hidden;isolation:isolate}
.home-main>.wrap{position:relative;z-index:1}
.constellation-v--hero{position:absolute;left:50%;top:46%;width:min(70vw,880px);height:auto;aspect-ratio:92/100;transform:translate(-50%,-50%);margin:0;opacity:.4;pointer-events:none;z-index:0}
.constellation-v--hero .cv-spine{stroke-width:.34;opacity:.46}
.constellation-v--hero .cv-line{stroke-width:.2;opacity:.56}
.home-intro h1,.home-intro .motto{position:relative;z-index:2;text-shadow:0 1px 20px rgba(247,248,250,.96),0 1px 8px rgba(247,248,250,.92)}
@media(max-width:760px){.constellation-v--hero{width:70vw;top:43%}}

/* Online support */
[hidden]{display:none!important}
.support-content{padding-top:26px}.support-wrap{display:grid;gap:16px}.support-identity{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 18px;background:#fff;border:1px solid var(--line);border-radius:14px}.support-identity div{display:flex;align-items:center;gap:10px}.support-identity span,.support-identity small{color:var(--muted)}.support-identity strong{color:var(--blue);font-size:14px}.support-identity small{font-size:12px;text-align:right}.support-panel{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 28px rgba(37,49,67,.05)}.message-list{list-style:none;margin:0;padding:26px;min-height:390px;max-height:58vh;overflow:auto;display:flex;flex-direction:column;gap:18px;background:linear-gradient(180deg,#fbfcff,#f7f9fc)}.message-empty{margin:auto;color:var(--muted);text-align:center;font-size:14px}.message-item{display:flex;flex-direction:column;align-items:flex-start;max-width:min(78%,680px)}.message-item--visitor{align-self:flex-end;align-items:flex-end}.message-meta{margin:0 6px 5px;color:#9099a6;font-size:12px}.message-bubble{padding:12px 15px;background:#fff;border:1px solid #e1e6ee;border-radius:15px 15px 15px 4px;box-shadow:0 5px 12px rgba(37,49,67,.04)}.message-item--visitor .message-bubble{color:#fff;background:#6683ee;border-color:#6683ee;border-radius:15px 15px 4px 15px}.message-bubble p{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.message-bubble img{display:block;max-width:min(100%,420px);max-height:420px;margin-top:9px;border-radius:10px;object-fit:contain;background:#eef1f7}.message-bubble img:first-child{margin-top:0}.message-composer{padding:20px 22px;border-top:1px solid var(--line);background:#fff}.message-composer>label{display:block;margin-bottom:8px;font-weight:700}.message-composer textarea,.admin-login-form input{width:100%;border:1px solid #d9dfe8;border-radius:11px;padding:12px 14px;color:var(--ink);background:#fbfcfe;font:inherit;resize:vertical;outline:none}.message-composer textarea:focus,.admin-login-form input:focus{border-color:#86a0ff;box-shadow:0 0 0 3px rgba(88,121,245,.1)}.composer-row{display:flex;align-items:center;gap:12px;margin-top:12px}.composer-row input[type=file]{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.image-picker{display:flex;align-items:baseline;gap:8px;padding:8px 12px;border:1px solid #d9dfe8;border-radius:9px;cursor:pointer;color:#4c5a70}.image-picker small{color:#929ba8;font-size:11px}.selected-file{min-width:0;flex:1;color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.composer-row .button{margin-left:auto}.form-status{min-height:1.6em;margin:9px 0 0;color:#d24c56;font-size:13px}.button:disabled{opacity:.55;cursor:not-allowed}

/* Support admin */
.admin-logout,.mini-button{appearance:none;border:0;background:none;cursor:pointer}.admin-login-card{max-width:480px;margin:18px auto}.admin-login-card>p{margin-bottom:20px}.admin-login-form{display:grid;gap:11px}.admin-login-form label{font-weight:700}.admin-login-form .button{justify-self:start;margin-top:5px}.admin-console{display:grid;grid-template-columns:310px minmax(0,1fr);min-height:650px;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 28px rgba(37,49,67,.05)}.conversation-sidebar{border-right:1px solid var(--line);background:#fafbfe}.conversation-title{display:flex;align-items:center;justify-content:space-between;padding:18px;border-bottom:1px solid var(--line)}.conversation-title h2{margin:0;font-size:18px}.mini-button{padding:5px 8px;color:var(--blue);font-size:12px}.conversation-list{max-height:650px;overflow:auto}.conversation-empty{padding:25px;color:var(--muted);font-size:13px;text-align:center}.conversation-item{display:flex;width:100%;flex-direction:column;gap:4px;padding:15px 17px;border:0;border-bottom:1px solid #ebeff4;background:transparent;color:var(--ink);text-align:left;cursor:pointer}.conversation-item:hover,.conversation-item.is-active{background:#eef3ff}.conversation-item-head{display:flex;align-items:center;justify-content:space-between}.conversation-item-head i{min-width:20px;padding:1px 5px;border-radius:10px;background:#5879f5;color:#fff;font-size:10px;font-style:normal;text-align:center}.conversation-item>span:not(.conversation-item-head){overflow:hidden;color:#667386;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.conversation-item small{color:#9aa2ae;font-size:11px}.admin-chat{display:flex;min-width:0;flex-direction:column}.admin-chat-head{padding:17px 22px;border-bottom:1px solid var(--line)}.admin-chat-head div{display:flex;gap:10px}.admin-chat-head span{color:var(--muted)}.admin-message-list{flex:1;max-height:520px}.admin-chat .message-composer{margin-top:auto}

@media(max-width:760px){.support-identity{align-items:flex-start;flex-direction:column}.support-identity small{text-align:left}.message-list{padding:17px;min-height:340px;max-height:55vh}.message-item{max-width:90%}.message-composer{padding:17px}.composer-row{align-items:stretch;flex-wrap:wrap}.image-picker{width:100%;justify-content:space-between}.selected-file{width:100%;flex-basis:55%}.admin-heading{padding-bottom:22px}.admin-console{grid-template-columns:1fr;min-height:0}.conversation-sidebar{border-right:0;border-bottom:1px solid var(--line)}.conversation-list{display:flex;max-height:190px;overflow:auto}.conversation-item{min-width:220px;border-right:1px solid var(--line)}.admin-chat{min-height:560px}.admin-message-list{max-height:430px}}

/* Frequently asked questions */
.faq-list{display:grid;gap:18px}.faq-card h2{font-size:20px;line-height:1.5}.faq-card p{margin-top:10px;line-height:1.85}.faq-card code{display:block;margin:14px 0;padding:13px 15px;overflow:auto;border-radius:10px;background:#f3f5f8;color:#344050;font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap}.faq-method{padding:12px 14px;border-left:3px solid #91a8ff;background:#f7f9ff;color:#536175!important}

/* Home notice and contact details */
.home-notice{width:min(720px,100%);margin:30px auto 0;padding:17px 20px;border:1px solid rgba(145,168,255,.6);border-radius:15px;background:rgba(255,255,255,.82);box-shadow:0 8px 24px rgba(66,91,150,.07);text-align:left;backdrop-filter:blur(8px)}.home-notice strong{display:block;color:#40506a;font-size:16px}.home-notice strong span{color:var(--blue);font-size:17px}.home-notice p{margin:7px 0 0;color:#69768a;font-size:14px;line-height:1.75}.home-notice p b{margin-right:4px;color:#455677}.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.contact-card>span{color:var(--blue);font-size:12px;font-weight:750;letter-spacing:.08em}.contact-card h2{margin-top:5px}.contact-card p{margin-top:9px}.contact-card a{color:#526fe0;overflow-wrap:anywhere}.contact-card a:hover{text-decoration:underline}@media(max-width:760px){.home-notice{margin-top:24px;padding:15px 16px}.contact-grid{grid-template-columns:1fr}}

/* Extracted image logo */
.brand-image{display:block;width:62px;height:62px;object-fit:contain}
@media(max-width:760px){.brand-image{width:52px;height:52px}}