/* Fixed-dark Panku marketing site. Asymmetric product workflow hero. */
:root{color-scheme:dark;--bg:#0c111b;--ink:#f0f4fc;--muted:#a4b0c5;--line:#293448;--soft:#111926;--card:#141e2d;--blue:#247aff;--blue-hover:#438cff;--blue-soft:#132b4d;--blue-ink:#9dc4ff;--shadow:0 24px 60px -30px rgba(0,0,0,.75);--font:"HarmonyOS Sans SC","Microsoft YaHei UI","PingFang SC",system-ui,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
button,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{color:inherit}
a{color:inherit;text-decoration:none}
button{cursor:pointer}
button:disabled{cursor:default}
img{display:block;max-width:100%;height:auto}
button,figure,h1,h2,h3,p{margin:0}
button{border:0}
strong,b{font-weight:650}
h1,h2,h3{font-weight:700;letter-spacing:-.05em;line-height:1.35}
h2{font-size:clamp(32px,4.2vw,48px)}
h3{font-size:24px}
ul,ol{margin:0;padding:0;list-style:none}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
::selection{background:#cee2ff;color:#12325f}
.shell{width:min(1180px,calc(100% - 80px));margin-inline:auto}
.section{padding-block:104px;scroll-margin-top:10px}
.soft-section{background:var(--soft)}
.skip-link{position:fixed;top:-100px;left:20px;z-index:99;background:var(--blue);color:white;padding:10px 20px}
.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:border-color .25s}
.site-header.scrolled{border-color:var(--line)}
.nav-row{height:80px;display:flex;align-items:center;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;font-size:20px;font-weight:720;letter-spacing:-.6px}
.brand img{border-radius:10px;width:38px;height:38px;object-fit:contain}
.brand b{font-weight:550;color:var(--muted);font-size:14px;margin-left:2px;letter-spacing:0}
.desktop-nav{display:flex;align-items:center;justify-content:center;gap:28px;flex:1;font-size:13px;font-weight:600}
.desktop-nav a{white-space:nowrap;position:relative;padding:10px 0}
.desktop-nav a::after{content:"";position:absolute;height:2px;background:var(--blue);bottom:2px;left:0;right:0;transform:scaleX(0);transition:transform .2s}
.desktop-nav a:hover::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:16px}
.button{background:var(--blue);color:#fff;display:inline-flex;align-items:center;justify-content:center;gap:18px;border-radius:999px;padding:13px 24px;font-size:14px;font-weight:650;border:1px solid transparent;line-height:1.5;white-space:nowrap;transition:background .2s,box-shadow .2s,transform .2s}
.button:hover{background:var(--blue-hover);box-shadow:0 8px 22px -10px rgba(8,103,232,.5);transform:translateY(-2px)}
.button span{font-size:17px}
.button.secondary{color:var(--ink);background:var(--card);border-color:var(--line)}
.button.secondary:hover{border-color:var(--blue);box-shadow:none}
.button.large{padding:16px 29px;font-size:15px}
.button.compact{padding:10px 20px;font-size:13px}
.menu-toggle{display:none;background:none;width:38px;height:40px;position:relative}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--ink);position:absolute;left:8px;top:15px;transition:transform .2s}
.menu-toggle span+span{top:23px}
.menu-toggle[aria-expanded=true] span{transform:translateY(4px) rotate(45deg)}
.menu-toggle[aria-expanded=true] span+span{transform:translateY(-4px) rotate(-45deg)}
.mobile-nav{background:var(--bg);border-bottom:1px solid var(--line);padding:8px 24px 20px;display:grid;grid-template-columns:1fr 1fr;gap:6px}
.mobile-nav a{padding:10px;font-size:14px;border-radius:10px}
.mobile-nav a:hover{background:var(--blue-soft)}
.source-band{border-block:1px solid var(--line);background:var(--bg);position:relative}
.source-row{padding-block:24px;display:flex;justify-content:space-between;align-items:center;gap:32px}
.source-row>p{font-size:13px;color:var(--muted)}
.source-platforms{display:flex;gap:56px;align-items:center}
.platform{display:flex;align-items:center;gap:12px}
.platform b{font-weight:800;font-size:21px;letter-spacing:-1px}
.platform small{font-size:11px;color:var(--muted);white-space:nowrap}
.platform .source-1688{font-size:25px;letter-spacing:-1.8px}
.section-heading{max-width:760px;margin-bottom:46px}
.section-heading>p:not(.kicker){font-size:15px;color:var(--muted);line-height:1.9;margin-top:20px;max-width:640px}
.section-heading.centered{margin-inline:auto;text-align:center}
.section-heading.centered>p{margin-inline:auto}
.kicker{font-size:11px;font-weight:700;color:var(--blue-ink);letter-spacing:.1em;margin-bottom:15px}
.workspace{border:1px solid var(--line);border-radius:22px;background:var(--card);box-shadow:var(--shadow);overflow:hidden}
.workflow-tabs{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);padding:12px 22px;gap:8px}
.workflow-tabs button{display:flex;align-items:center;gap:12px;justify-content:center;border-radius:12px;padding:14px 10px;background:transparent;color:var(--muted);font-size:14px;transition:background .2s,color .2s}
.workflow-tabs button>span{font-size:10px;font-variant-numeric:tabular-nums;opacity:.7}
.workflow-tabs button[aria-selected=true]{background:var(--blue-soft);color:var(--blue-ink);font-weight:650}
.workflow-panel{display:grid;grid-template-columns:290px 1fr;gap:28px;padding:34px 26px 22px;align-items:center}
.step-label{font-size:10px;color:var(--muted);letter-spacing:.03em}
.workflow-copy h3{font-size:24px;line-height:1.6;margin:13px 0 16px;letter-spacing:-.04em}
.workflow-copy>p{font-size:13px;color:var(--muted);line-height:1.9}
.workflow-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:22px}
.workflow-tags span{border-bottom:1px solid var(--line);font-size:11px;padding:3px 0;margin-right:10px;color:var(--blue-ink)}
.screenshot-button{display:block;background:var(--soft);border:1px solid var(--line);border-radius:14px;overflow:hidden;position:relative;padding:0;width:100%;text-align:left}
.screenshot-button img{width:100%;transition:transform .4s}
.screenshot-button:hover img{transform:scale(1.015)}
.zoom-hint{display:block;position:absolute;bottom:12px;right:12px;background:rgba(15,31,54,.9);color:#fff;border-radius:999px;padding:6px 12px;font-size:10px;opacity:0;transform:translateY(5px);transition:.2s;pointer-events:none}
.screenshot-button:hover .zoom-hint,.screenshot-button:focus-visible .zoom-hint{opacity:1;transform:none}
.screen-caption{font-size:10px;color:var(--muted);padding:9px 26px 17px;text-align:right}
.capability-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:20px}
.capability-card{padding:34px;border:1px solid var(--line);border-radius:22px;background:var(--card);overflow:hidden;display:flex;flex-direction:column}
.card-topline{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:12px;margin-bottom:22px}
.number{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.capability-card h3{font-size:30px;line-height:1.45;letter-spacing:-.06em}
.capability-card>p{font-size:13px;color:var(--muted);margin-top:16px;line-height:1.9;max-width:450px}
.card-note{font-size:10px;color:var(--muted);padding-top:20px;margin-top:auto}
.image-card{background:linear-gradient(145deg,var(--card),var(--blue-soft))}
.image-illustration{height:230px;position:relative;display:flex;align-items:center;justify-content:center;gap:30px;margin-top:16px}
.image-illustration>img{width:150px;height:150px;transform:rotate(-9deg);filter:drop-shadow(0 18px 16px rgba(13,90,205,.2));border-radius:30px}
.image-illustration>div{display:flex;flex-direction:column;gap:12px}
.image-illustration span{border-radius:10px;padding:8px 18px;background:var(--card);color:var(--blue-ink);font-size:13px;box-shadow:0 7px 16px -10px rgba(22,78,160,.3);border:1px solid var(--line)}
.image-illustration span:nth-child(2){transform:translateX(12px)}
.small-screen{margin-top:25px;max-height:235px}
.small-screen img{width:100%;height:235px;object-fit:cover;object-position:top}
.category-card{min-height:410px}
.category-tree{margin-top:28px;display:grid;grid-template-columns:1fr 24px 1fr;align-items:center;gap:0;padding:25px 0}
.category-tree>div{padding:19px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}
.category-tree span:not(.tree-line){display:block;color:var(--muted);font-size:10px;margin-bottom:6px}
.category-tree b{font-size:12px;color:var(--blue-ink);display:block}
.tree-line{height:1px;background:var(--blue);position:relative}
.tree-line::after{content:"";position:absolute;right:0;top:-2px;width:5px;height:5px;border-top:1px solid var(--blue);border-right:1px solid var(--blue);transform:rotate(45deg)}
.formula-card{background:var(--blue-soft);border-color:color-mix(in srgb,var(--blue) 22%,var(--line))}
.formula-demo{background:var(--card);border:1px solid var(--line);padding:20px;border-radius:14px;margin-top:25px}
.formula-demo code{display:block;font-family:var(--font);font-size:12px;color:var(--blue-ink);letter-spacing:0;white-space:nowrap}
.formula-input-row{display:grid;grid-template-columns:1fr 24px 1fr;gap:12px;align-items:center;margin-top:22px}
.formula-input-row>span{color:var(--muted);text-align:center}
.formula-input-row label{font-size:10px;color:var(--muted)}
.formula-input-row input{display:block;border-radius:10px;padding:10px 12px;width:100%;min-width:0;font-size:20px;font-weight:650;border:1px solid var(--line);background:var(--soft);color:var(--ink);margin-top:6px}
.formula-result>span{display:block;color:var(--muted);font-size:10px}
.formula-result output{display:block;font-size:28px;font-weight:700;color:var(--blue-ink);font-variant-numeric:tabular-nums;line-height:1.7}
.formula-demo>p{color:var(--muted);font-size:10px;margin-top:15px;min-height:17px}
.business-showcase{display:grid;grid-template-columns:330px 1fr;gap:48px;align-items:center}
.business-navigation{display:flex;flex-direction:column;gap:6px}
.business-navigation button{display:grid;grid-template-columns:24px 1fr 15px;gap:12px;align-items:start;text-align:left;padding:22px 18px;background:transparent;border-radius:14px;border:1px solid transparent;transition:.2s}
.business-navigation button[aria-selected=true]{background:var(--blue-soft);border-color:color-mix(in srgb,var(--blue) 20%,var(--line))}
.business-navigation button b{font-size:16px;display:block}
.business-navigation button small{display:block;margin-top:6px;color:var(--muted);font-size:11px;line-height:1.9}
.business-navigation button[aria-selected=true] b{color:var(--blue-ink)}
.business-navigation button>span:last-child{color:var(--muted);font-size:15px}
.business-panel{min-width:0}
.business-panel>p{margin-top:16px;font-size:12px;color:var(--muted);line-height:1.9}
.business-panel .screenshot-button{box-shadow:var(--shadow)}
.feature-groups{display:grid;grid-template-columns:repeat(3,1fr);column-gap:38px;row-gap:44px}
.feature-group{border-top:1px solid var(--line);padding:24px 0 0}
.feature-group h3{margin-top:12px;font-size:19px;letter-spacing:-.03em}
.feature-group ul{display:grid;gap:9px;margin-top:19px}
.feature-group li{color:var(--muted);font-size:12px;padding-left:14px;position:relative}
.feature-group li::before{content:"";position:absolute;left:0;top:10px;width:4px;height:4px;border-radius:50%;background:var(--blue)}
.plan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;align-items:stretch}
.plan-card{position:relative;border:1px solid var(--line);border-radius:22px;padding:30px 24px 24px;background:var(--card);transition:transform .3s,box-shadow .3s}
.plan-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.plan-card.recommended{border:1.5px solid var(--blue);background:linear-gradient(180deg,var(--blue-soft),var(--card) 70%)}
.plan-heading{min-height:78px}
.plan-heading h3{font-size:21px;letter-spacing:-.04em}
.plan-heading>p{font-size:11px;color:var(--muted);margin-top:8px}
.plan-tag{position:absolute;top:-13px;left:24px;line-height:24px;font-size:10px;font-weight:600;border-radius:999px;padding-inline:13px;background:var(--blue);color:#fff;white-space:nowrap}
.plan-price{display:flex;align-items:baseline;gap:3px;margin-top:16px;font-variant-numeric:tabular-nums;white-space:nowrap;line-height:1.1}
.plan-price>span{font-size:19px;margin-right:3px}
.plan-price strong{font-size:42px;font-weight:750;letter-spacing:-.06em;line-height:1.4}
.plan-price small{font-size:12px;color:var(--muted);margin-left:3px}
.plan-note{font-size:10px;color:var(--muted);min-height:42px;margin-top:9px;line-height:1.9}
.plan-quota{display:flex;align-items:center;gap:15px;border-block:1px solid var(--line);padding:24px 0 23px;margin-top:12px}
.plan-quota>b{font-size:38px;line-height:1.2;letter-spacing:-.07em;color:var(--blue-ink)}
.plan-quota>b.unlimited{font-size:29px;letter-spacing:-.05em}
.plan-quota>span{font-size:10px;color:var(--muted);line-height:1.8}
.plan-benefits{display:grid;gap:14px;margin-block:24px 29px}
.plan-benefits li{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted)}
.plan-benefits b{color:var(--ink);white-space:nowrap}
.plan-select{width:100%;font-size:12px;padding:12px 12px;gap:12px}
.quota-explanation{display:grid;grid-template-columns:48px 1fr;gap:24px;border:1px solid var(--line);border-radius:14px;padding:26px 30px;background:var(--soft);margin-top:28px}
.quota-symbol{height:46px;width:46px;background:var(--blue-soft);color:var(--blue-ink);font-size:22px;border-radius:50%;display:grid;place-items:center}
.quota-explanation h3{font-size:15px;letter-spacing:-.02em;line-height:1.6}
.quota-explanation p{font-size:11px;color:var(--muted);line-height:1.95;margin-top:8px}
.quota-explanation p+p{font-size:10px}
.faq-layout{display:grid;grid-template-columns:330px 1fr;gap:75px}
.faq-intro>p{color:var(--muted);font-size:13px;margin-top:20px}
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:14px;font-weight:600;padding:22px 0}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary>span{font-size:21px;color:var(--muted);font-weight:400;transition:transform .2s}
.faq-list details[open] summary>span{transform:rotate(45deg)}
.faq-list details[open] summary{color:var(--blue-ink)}
.faq-list details>p{font-size:12px;color:var(--muted);line-height:2;padding:0 36px 22px 0}
.start-section{display:grid;grid-template-columns:1fr 410px;gap:90px;align-items:center}
.start-copy>p:not(.kicker){font-size:14px;color:var(--muted);margin-top:21px;line-height:1.9}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}
.inline-contact{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:28px;font-size:11px}
.inline-contact>span{color:var(--muted)}
.inline-contact strong{letter-spacing:.02em}
.inline-contact button{color:var(--blue-ink);background:transparent;border-bottom:1px solid currentColor;padding:0;font-size:11px}
.getting-started{background:var(--soft);border:1px solid var(--line);padding:34px 34px;border-radius:22px}
.getting-started h3{font-size:20px;margin-bottom:30px}
.getting-started ol{display:grid;gap:28px}
.getting-started li{display:grid;grid-template-columns:35px 1fr;gap:15px;align-items:start}
.getting-started li>span{font-size:11px;color:var(--blue-ink);background:var(--blue-soft);width:32px;height:32px;border-radius:50%;display:grid;place-items:center}
.getting-started b{font-size:14px}
.getting-started p{font-size:11px;color:var(--muted);margin-top:6px;line-height:1.8}
.site-footer{border-top:1px solid var(--line);padding-block:33px 22px}
.footer-top{display:flex;align-items:center;gap:40px}
.footer-top p{flex:1;font-size:11px;color:var(--muted)}
.footer-top>a:last-child{font-size:11px;color:var(--muted)}
.footer-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:18px;color:var(--muted);font-size:10px}
.preview-label{border:1px solid var(--line);border-radius:999px;padding:1px 10px;font-size:9px}
dialog{color:var(--ink);background:var(--card);border:1px solid var(--line);box-shadow:0 30px 120px rgba(9,33,79,.25);border-radius:22px;margin:auto;padding:0;max-height:calc(100dvh - 48px)}
dialog::backdrop{background:rgba(10,22,42,.55);backdrop-filter:blur(6px)}
.contact-dialog{width:min(450px,calc(100% - 32px))}
.dialog-content{padding:38px;position:relative}
.dialog-content>img{width:56px;height:56px;border-radius:14px;margin-bottom:20px}
.dialog-kicker{font-size:11px;color:var(--muted);margin-bottom:8px}
.dialog-content h2{font-size:27px;letter-spacing:-.06em;line-height:1.5}
.dialog-close{position:absolute;right:16px;top:13px;border-radius:50%;width:34px;height:34px;line-height:34px;text-align:center;background:var(--soft);font-size:23px;color:var(--muted)}
.selected-plan{margin-top:15px;font-size:13px;color:var(--muted);line-height:1.8}
.wechat-box{display:flex;flex-direction:column;padding:20px;background:var(--blue-soft);border:1px solid var(--line);border-radius:14px;margin:22px 0 16px}
.wechat-box span{font-size:11px;color:var(--muted)}
.wechat-box strong{font-size:22px;color:var(--blue-ink);letter-spacing:.02em;margin-top:4px}
.full-width{width:100%}
.dialog-tip{font-size:10px;color:var(--muted);line-height:1.8;margin-top:17px}
.image-dialog{width:min(1500px,calc(100% - 40px));max-height:calc(100dvh - 40px);padding:16px}
.image-dialog-top{height:40px;position:relative;display:flex;align-items:center;padding:0 8px}
.image-dialog-top h2{font-size:14px;letter-spacing:0}
.image-dialog-top .dialog-close{top:0;right:0}
.image-dialog>img{width:auto;max-width:100%;max-height:calc(100dvh - 140px);object-fit:contain;margin:auto;border-radius:10px}
.image-dialog>p{text-align:center;color:var(--muted);font-size:10px;margin-top:12px}
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:50;border:1px solid var(--line);background:var(--ink);color:var(--bg);border-radius:999px;padding:12px 23px;font-size:12px;box-shadow:var(--shadow);max-width:calc(100% - 32px);white-space:normal;text-align:center}
.noscript-note{background:var(--blue-soft);color:var(--ink);padding:20px;font-size:13px}
.reveal{opacity:1;transform:none}
.js .reveal{transition:opacity .7s cubic-bezier(.2,.8,.3,1),transform .7s cubic-bezier(.2,.8,.3,1)}
.js .reveal.pending{opacity:0;transform:translateY(24px)}
.js .reveal.visible{opacity:1;transform:none}
body.modal-open{overflow:hidden}
@media(max-width:1199px){.shell{width:calc(100% - 60px)}
.desktop-nav{gap:18px;font-size:12px}
.nav-row{gap:22px}
.brand{font-size:18px}
.nav-actions{gap:8px}
.nav-actions .button{padding:9px 15px}
.source-platforms{gap:24px}
.platform{gap:8px}
.platform small{font-size:9px}
.plan-card{padding:28px 19px 22px}
.plan-price strong{font-size:36px}
.workflow-panel{grid-template-columns:250px 1fr;gap:22px}
.business-showcase{grid-template-columns:300px 1fr;gap:30px}
.start-section{grid-template-columns:1fr 370px;gap:55px}}
@media(max-width:1023px){.desktop-nav{display:none}
.nav-row{justify-content:space-between;height:72px}
.menu-toggle{display:block}
.nav-actions{gap:12px}
.source-row{flex-direction:column;gap:12px;padding-block:24px}
.source-platforms{gap:36px}
.platform small{font-size:10px}
.section{padding-block:80px}
.workflow-panel{grid-template-columns:1fr;padding:26px;gap:24px}
.workflow-copy{display:grid;grid-template-columns:.9fr 1fr;gap:0 25px}
.step-label{grid-column:1/-1}
.workflow-copy h3{grid-row:2/4;margin:13px 0 0;font-size:26px}
.workflow-copy>p{margin-top:13px}
.workflow-tags{margin-top:12px}
.business-showcase{grid-template-columns:1fr;gap:25px}
.business-navigation{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.business-navigation button{display:block;padding:17px 13px}
.business-navigation button>.number{display:block;margin-bottom:5px}
.business-navigation button>span:last-child{display:none}
.business-navigation button b{font-size:14px}
.business-navigation button small{font-size:10px}
.plan-grid{grid-template-columns:repeat(2,1fr);gap:22px}
.plan-price strong{font-size:47px}
.plan-heading{min-height:72px}
.faq-layout{grid-template-columns:260px 1fr;gap:35px}
.start-section{gap:35px;grid-template-columns:1fr 330px}
.download-actions .button{font-size:13px;padding:13px 22px}}
@media(max-width:767px){.shell{width:calc(100% - 40px)}
.section{padding-block:64px}
html{scroll-padding-top:86px}
.source-platforms{gap:23px;justify-content:center;width:100%}
.platform{flex-direction:column;gap:0}
.platform b{font-size:18px}
.platform small{font-size:8px}
.platform .source-1688{font-size:21px}
.source-row>p{font-size:11px}
.source-row{padding-block:21px;gap:14px}
.section-heading{margin-bottom:30px}
.section-heading h2,.faq-intro h2,.start-copy h2{font-size:32px}
.section-heading>p:not(.kicker){font-size:12px;line-height:1.95;margin-top:17px}
.kicker{font-size:10px;margin-bottom:11px}
.workflow-tabs{padding:10px;gap:0}
.workflow-tabs button{font-size:11px;gap:4px;padding:11px 4px}
.workflow-tabs button>span{display:none}
.workflow-panel{padding:24px 16px 16px;gap:23px}
.workflow-copy{display:block}
.workflow-copy h3{font-size:22px;line-height:1.55;margin:10px 0 14px}
.workflow-copy>p{font-size:12px;margin:0}
.workflow-tags{margin-top:14px}
.workflow-tags span{font-size:10px}
.screen-caption{font-size:9px;text-align:left;padding:0 16px 17px}
.zoom-hint{opacity:1;transform:none;font-size:8px;bottom:7px;right:7px;padding:3px 8px}
.capability-grid{grid-template-columns:1fr;gap:16px}
.capability-card{padding:26px;min-height:0}
.capability-card h3{font-size:27px}
.capability-card>p{font-size:12px}
.card-topline{font-size:11px;margin-bottom:17px}
.image-illustration{height:175px;margin-top:15px;gap:32px}
.image-illustration>img{width:120px;height:120px;border-radius:25px}
.image-illustration span{padding:6px 14px;font-size:11px}
.small-screen{max-height:210px}
.small-screen img{height:210px}
.category-tree{padding:13px 0;margin-top:25px}
.category-tree>div{padding:16px 13px}
.category-tree b{font-size:11px}
.formula-demo{padding:17px}
.formula-demo code{font-size:11px;white-space:normal}
.card-note{font-size:9px;padding-top:17px}
.business-navigation{grid-template-columns:repeat(2,1fr);gap:8px}
.business-navigation button{padding:15px}
.business-navigation button b{font-size:13px}
.business-panel>p{font-size:11px}
.feature-groups{grid-template-columns:repeat(2,1fr);gap:29px 20px}
.feature-group h3{font-size:16px}
.feature-group li{font-size:10px;line-height:1.85;padding-left:11px}
.feature-group ul{gap:8px}
.feature-group li::before{top:8px;width:3px;height:3px}
.feature-group{padding-top:18px}
.plan-grid{gap:18px 12px}
.plan-card{padding:25px 18px 18px}
.plan-price strong{font-size:37px}
.plan-price>span{font-size:15px}
.plan-price small{font-size:10px}
.plan-heading h3{font-size:18px}
.plan-heading>p{font-size:10px;line-height:1.8}
.plan-heading{min-height:76px}
.plan-note{font-size:9px;min-height:43px}
.plan-quota{gap:10px;padding-block:20px}
.plan-quota>b{font-size:34px}
.plan-quota>span{font-size:9px}
.plan-quota>b.unlimited{font-size:25px}
.plan-benefits{gap:12px;margin:22px 0}
.plan-benefits li{font-size:10px;gap:4px}
.plan-select{font-size:10px;padding:10px 4px;gap:8px}
.plan-select span{font-size:13px}
.plan-tag{left:17px;font-size:9px;padding-inline:10px}
.quota-explanation{grid-template-columns:1fr;gap:15px;padding:23px;position:relative}
.quota-symbol{width:35px;height:35px;font-size:18px}
.quota-explanation h3{font-size:14px}
.quota-explanation p{font-size:10px}
.faq-layout{grid-template-columns:1fr;gap:28px}
.faq-intro>p{font-size:12px;margin-top:16px}
.faq-list summary{font-size:12px;padding-block:19px;gap:16px}
.faq-list details>p{font-size:11px;padding-right:20px}
.start-section{grid-template-columns:1fr;gap:37px}
.start-copy>p:not(.kicker){font-size:13px}
.getting-started{padding:28px}
.getting-started h3{font-size:18px}
.getting-started ol{gap:23px}
.download-actions .button{font-size:12px;padding:13px 22px;gap:12px}
.inline-contact{font-size:10px;gap:10px}
.footer-top{display:grid;grid-template-columns:1fr auto;gap:20px}
.footer-top p{grid-row:2;grid-column:1/-1;font-size:10px}
.footer-bottom{font-size:9px;gap:10px;flex-wrap:wrap;justify-content:flex-start}
.footer-bottom>span:last-child{margin-left:auto}
.site-footer{padding-block:27px 20px}
.brand{font-size:18px;gap:9px}
.brand img{width:32px;height:32px}
.nav-actions .button{padding:8px 13px;font-size:11px;gap:8px}
.nav-actions .button span{font-size:14px}
.nav-actions{gap:8px}
.contact-dialog .dialog-content{padding:30px 25px}
.dialog-content h2{font-size:25px}
.image-dialog{width:calc(100% - 20px);padding:10px;border-radius:14px}
.image-dialog-top h2{font-size:12px}
.image-dialog>img{max-height:calc(100dvh - 130px)}}
@media(max-width:389px){.shell{width:calc(100% - 32px)}
.plan-grid{grid-template-columns:1fr;gap:24px}
.plan-card{padding:30px}
.plan-heading{min-height:60px}
.plan-price strong{font-size:47px}
.plan-benefits li{font-size:12px}
.plan-select{font-size:13px}
.plan-note{font-size:11px;min-height:24px}
.plan-heading>p{font-size:12px}
.plan-quota>span{font-size:11px}
.feature-group h3{font-size:14px}
.formula-input-row{gap:9px}
.footer-bottom>span:last-child{margin-left:0}
.nav-actions .button{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*,*::before,*::after{animation:none!important;transition:none!important}
.js .reveal.pending{opacity:1;transform:none}
.button:hover,.plan-card:hover,.screenshot-button:hover img{transform:none}}
@supports not (background:color-mix(in srgb,white,black)){.site-header{background:var(--bg)}}
.screenshot-button[data-image-state=loading] img{opacity:.65}
.screenshot-button[data-image-state=error]::before{content:"演示图片暂未载入，点击查看大图重试";position:absolute;inset:0;display:grid;place-items:center;background:var(--soft);color:var(--muted);font-size:12px;text-align:center;padding:24px;z-index:1}

.hero-revised{position:relative;isolation:isolate;overflow:clip;padding-top:54px;padding-bottom:0;text-align:left}
.hero-grid{display:grid;grid-template-columns:minmax(0,.93fr) minmax(0,1.07fr);align-items:center;gap:42px;min-height:440px;padding-bottom:38px}
.hero-copy{position:relative;z-index:2;padding-block:20px}
.hero-eyebrow{display:flex;align-items:center;gap:14px;color:var(--blue-ink);font-size:11px;letter-spacing:.08em;font-weight:650;margin-bottom:26px}
.hero-eyebrow span{color:#546580;font-weight:400}
.hero h1{font-size:clamp(44px,5.25vw,70px);line-height:1.19;font-weight:750;letter-spacing:-.055em}
.hero h1>span{color:#79b1ff}
.hero-description{font-size:14px;line-height:1.95;color:var(--muted);margin-top:26px;max-width:440px}
.hero-actions{display:flex;align-items:center;justify-content:flex-start;gap:28px;margin-top:32px;flex-wrap:wrap}
.hero-actions .button{padding:15px 26px;border-radius:14px;font-size:14px;gap:23px}
.hero-pricing-link{display:inline-flex;gap:14px;align-items:center;min-height:48px;font-size:13px;border-bottom:1px solid #40516b;transition:color .2s,border-color .2s}
.hero-pricing-link:hover{color:var(--blue-ink);border-color:var(--blue-ink)}
.hero-footnote{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:10px;margin-top:25px}
.hero-footnote>span{width:5px;height:5px;background:#79b1ff;border-radius:50%}
.hero-art{position:relative;min-width:0;align-self:stretch;display:flex;flex-direction:column;justify-content:center;border-top:1px solid #293a52;border-bottom:1px solid #293a52;pointer-events:none}
.hero-art::before,.hero-art::after{content:"";position:absolute;width:22px;height:22px;left:0;border-left:2px solid #79b1ff}
.hero-art::before{top:-1px;border-top:2px solid #79b1ff}
.hero-art::after{bottom:-1px;border-bottom:2px solid #79b1ff}
.hero-art-label{position:absolute;top:17px;left:23px;z-index:2;font-size:11px;color:var(--muted);letter-spacing:.08em}
.hero-art-stage{position:relative;min-height:340px;display:grid;place-items:center;isolation:isolate}
.hero-art-stage img{width:100%;height:auto;position:relative;z-index:1;filter:drop-shadow(0 26px 24px rgba(0,24,65,.4));animation:hero-arrive 1s cubic-bezier(.2,.75,.3,1) both}
.hero-art-orbit{position:absolute;width:71%;aspect-ratio:1;border:1px solid #243850;border-radius:50%;transform:rotate(-25deg) scaleY(.78);background:radial-gradient(ellipse,rgba(36,122,255,.14),transparent 65%)}
.hero-art-orbit::before{content:"";position:absolute;inset:22px;border:1px dashed #243850;border-radius:50%}
.hero-art-bottom{position:absolute;bottom:16px;left:23px;right:20px;display:flex;justify-content:space-between;color:#8ca3c2;font-size:10px;letter-spacing:.05em}
.hero-route{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.hero-route li{display:flex;align-items:center;gap:16px;padding:25px 24px 26px 0;min-width:0}
.hero-route li+li{border-left:1px solid var(--line);padding-left:25px}
.route-number{font-size:26px;line-height:1.1;font-weight:350;color:#7a9dc9;font-variant-numeric:tabular-nums;letter-spacing:-.05em}
.hero-route b{font-size:13px;line-height:1.7;color:var(--ink)}
.hero-route p{font-size:10px;color:var(--muted);line-height:1.75;margin-top:2px}
.route-arrow{margin-left:auto;font-size:20px;color:#607da5}
.monthly-label{text-align:center;color:var(--blue-ink);font-size:12px;margin:-14px 0 32px}
@keyframes hero-arrive{from{opacity:0;transform:translate(15px,12px)}to{opacity:1;transform:none}}
@media(max-width:1199px){.hero-grid{gap:26px;min-height:420px}.hero h1{font-size:56px}.hero-description{font-size:13px}.hero-art-stage{min-height:310px}.hero-actions{gap:22px}.hero-route li{gap:12px}.hero-route li+li{padding-left:20px}}
@media(max-width:1023px){.hero-revised{padding-top:35px}.hero-grid{min-height:370px;gap:22px;padding-bottom:28px}.hero h1{font-size:46px}.hero-description{font-size:12px;margin-top:23px}.hero-eyebrow{font-size:9px;gap:8px;margin-bottom:23px}.hero-actions{gap:15px;margin-top:27px}.hero-actions .button{font-size:12px;padding:13px 18px;gap:15px}.hero-pricing-link{font-size:11px;gap:8px}.hero-art-stage{min-height:300px}.hero-art-label{font-size:9px;left:16px}.hero-art-bottom{left:16px;font-size:8px}.hero-route li{padding-block:23px;gap:10px}.hero-route li+li{padding-left:16px}.route-number{font-size:23px}.hero-route b{font-size:11px}.hero-route p{font-size:10px}.route-arrow{font-size:14px}}
@media(max-width:767px){.hero-revised{padding-top:25px}.hero-grid{grid-template-columns:1fr;gap:26px;min-height:0;padding-bottom:26px}.hero-copy{padding-top:11px;padding-bottom:0}.hero-eyebrow{font-size:10px;margin-bottom:20px}.hero h1{font-size:clamp(42px,8.7vw,57px)}.hero-description{font-size:12px;line-height:1.9;margin-top:22px}.hero-actions{margin-top:25px;gap:25px}.hero-actions .button{padding:14px 22px;font-size:13px}.hero-pricing-link{font-size:12px}.hero-footnote{margin-top:20px}.hero-art{min-height:270px}.hero-art-stage{min-height:260px;padding:22px 0 17px}.hero-art-stage img{max-width:510px}.hero-art-label{top:13px;font-size:9px}.hero-art-bottom{bottom:12px;font-size:8px}.hero-route{grid-template-columns:1fr}.hero-route li{padding:15px 0;gap:19px}.hero-route li+li{padding-left:0;border-left:0;border-top:1px solid var(--line)}.hero-route li>div{display:flex;align-items:center;justify-content:space-between;gap:12px;flex:1}.route-number{font-size:19px}.hero-route b{font-size:12px}.hero-route p{font-size:11px;margin:0}.route-arrow{display:none}.monthly-label{margin:-8px 0 28px;font-size:11px}}
@media(max-width:389px){.hero-description{font-size:11px}.hero-eyebrow{font-size:10px;gap:7px}.hero-actions{gap:17px}.hero-actions .button{padding:13px 18px;font-size:12px}.hero-pricing-link{font-size:11px}.hero-art{min-height:235px}.hero-art-stage{min-height:235px}.hero-route li{gap:12px}.hero-route b{font-size:11px}.hero-route p{font-size:10px}.hero-route li>div{gap:8px}}
@media(prefers-reduced-motion:reduce){.hero-art-stage img{animation:none}.hero-pricing-link{transition:none}}

/* Blue light and route traces add depth while leaving UI cards opaque. */
main{--route-texture:url("assets/background-route.svg");--route-size:1600px 1040px;position:relative;isolation:isolate}
main::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background-image:radial-gradient(ellipse 710px 540px at 6% 3%,rgba(33,105,190,.26),transparent 76%),radial-gradient(ellipse 790px 550px at 91% 5%,rgba(30,113,231,.23),transparent 74%),var(--route-texture);background-repeat:no-repeat,no-repeat,repeat-y;background-size:auto,auto,var(--route-size);background-position:center top,center top,center top}
.hero-revised{background:radial-gradient(ellipse at 77% 36%,rgba(37,120,255,.085),transparent 62%)}
.hero-revised::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(110deg,transparent 44%,rgba(89,163,255,.06) 44.1%,transparent 44.25%,transparent 78%,rgba(89,163,255,.065) 78.1%,transparent 78.25%)}
.hero-art{background:radial-gradient(ellipse at center,rgba(40,123,250,.13),transparent 72%)}
.hero-art-orbit{border-color:#345474;background:radial-gradient(ellipse,rgba(36,122,255,.23),transparent 66%)}
.hero-route{background:linear-gradient(110deg,rgba(40,98,176,.09),rgba(15,28,48,.32));border-radius:0 0 18px 18px}
.source-band{background:linear-gradient(90deg,#0e1c30,#0d1522 48%,#112038)}
.soft-section{background-color:var(--soft);background-image:radial-gradient(ellipse 650px 370px at 0 15%,rgba(36,114,212,.13),transparent 75%),radial-gradient(ellipse 690px 380px at 100% 85%,rgba(26,90,170,.1),transparent 75%),var(--route-texture);background-size:auto,auto,var(--route-size)}
#business{background:radial-gradient(ellipse at 96% 64%,rgba(32,111,214,.12),transparent 60%)}
.pricing-section{background:radial-gradient(ellipse at 50% 48%,rgba(39,102,191,.16),transparent 70%)}
.plan-card{box-shadow:0 24px 62px -34px rgba(0,0,0,.72),inset 0 1px 0 rgba(124,183,255,.065)}
.download-section{position:relative;background:radial-gradient(ellipse at 10% 30%,rgba(37,116,212,.15),transparent 68%)}
.site-footer{background:linear-gradient(110deg,#101d31,#0c111b 62%)}
@media(max-width:767px){main{--route-texture:none}main::before{background-image:radial-gradient(ellipse 370px 440px at 0 2%,rgba(33,105,190,.21),transparent 76%),radial-gradient(ellipse 390px 430px at 100% 5%,rgba(30,113,231,.2),transparent 76%),var(--route-texture)}.hero-revised::before{opacity:.5}.hero-art{background:radial-gradient(ellipse,rgba(40,123,250,.1),transparent 75%)}}