/* App brand/base colors are inherited from TieNote tokens v0.5. Web layout extensions are local to this website. */
:root{--brand:#075a60;--ink:#23262d;--muted:#656d79;--tint:#e4efed;--card:#f7f7f8;--line:#dfe5e3;--paper:#fbfcfa;--white:#fff;--dark:#073e43;--mint:#c2e3d5;--radius:14px;--small-radius:10px;--page:1184px;--section:112px;--space:24px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;height:auto}svg{width:24px;height:24px;flex-shrink:0;vertical-align:middle}p,h1,h2,h3,figure{margin:0}h1,h2,h3{font-weight:600;line-height:1.3;text-wrap:balance}p{text-wrap:pretty}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--brand);outline-offset:5px}a:hover{color:var(--brand)}::selection{background:#c2e3d5;color:var(--dark)}.wrap{max-width:var(--page);margin-inline:auto;width:calc(100% - 96px)}.skip{position:absolute;left:16px;top:-100px;padding:12px 20px;background:var(--white);z-index:10}.skip:focus{top:16px}.site-header{background:rgba(251,252,250,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;backdrop-filter:blur(18px)}.header-inner{max-width:var(--page);width:calc(100% - 96px);margin:auto;display:flex;align-items:center;gap:32px;min-height:88px}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;font-size:21px;font-weight:650;letter-spacing:-.5px}.brand img{border-radius:10px;flex-shrink:0}.brand>span{display:flex;gap:12px;align-items:baseline}.brand-cn{font-size:13px;letter-spacing:1px;color:var(--muted);font-weight:500}.main-nav{margin-left:auto;display:flex;gap:30px;font-size:14px}.main-nav a{padding-block:12px;position:relative}.main-nav a[aria-current=page]{color:var(--brand)}.main-nav a[aria-current=page]:after{content:"";position:absolute;width:4px;height:4px;border-radius:50%;bottom:3px;left:50%;background:var(--brand)}.language{border-left:1px solid var(--line);padding:10px 0 10px 24px;font-size:13px}.language span{margin-left:5px}.eyebrow{font-size:12px;font-weight:600;letter-spacing:2px;color:var(--brand);margin-bottom:24px}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:46px;align-items:center;min-height:702px;padding-block:76px 72px}.hero h1{font-size:clamp(40px,4.2vw,60px);letter-spacing:-2px;line-height:1.35}.hero em{font-style:normal;color:var(--brand)}.hero-intro{font-size:17px;color:var(--muted);margin:28px 0 32px;line-height:1.95}.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.button{display:inline-flex;gap:18px;align-items:center;justify-content:center;min-height:50px;border-radius:999px;padding:12px 24px;font-size:14px;font-weight:600;cursor:pointer;transition:background .18s,transform .18s;line-height:1.5;border:1px solid transparent}.button svg{width:19px;height:19px}.button.primary{background:var(--brand);color:white}.button.primary:hover{background:var(--dark);transform:translateY(-2px)}.button.outline{border-color:var(--line);background:transparent;color:var(--brand)}.button.outline:hover{background:var(--tint)}.launch{font-size:12px;color:var(--muted);white-space:nowrap;display:flex;gap:7px;align-items:center}.launch i{width:6px;height:6px;background:#488873;border-radius:50%}.hero-foot{font-size:12px;letter-spacing:.5px;color:var(--muted);margin-top:40px}.story{position:relative;isolation:isolate;padding:30px 30px 0;min-width:0}.story-grid{position:absolute;z-index:-1;inset:0 -12px 14px;background-color:#eaf1ed;background-image:linear-gradient(#c8dbd033 1px,transparent 1px),linear-gradient(90deg,#c8dbd033 1px,transparent 1px);background-size:30px 30px;border-radius:50% 48% 38% 28%;transform:rotate(-5deg)}.story-label{font-size:13px;letter-spacing:2px;color:var(--brand);margin:0 0 32px 10px;font-weight:600}.story-label span{font-size:10px;margin-left:10px}.note-paper{background:#fff;padding:28px 30px;border:1px solid #e4e8e2;box-shadow:0 18px 46px #183d2c0b;border-radius:4px 4px 14px 14px;transform:rotate(-3deg);position:relative;border-top:3px solid var(--brand)}.paper-top{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.5px;color:var(--muted);margin-bottom:26px}.paper-top>span:first-child{display:flex;align-items:center;gap:8px;color:var(--brand)}.paper-top svg{width:16px;height:16px}.note-paper h2{font-size:27px;letter-spacing:-.5px;margin-bottom:20px}.note-paper p{color:var(--muted);font-size:14px;line-height:2}.mentions{display:flex;gap:8px;flex-wrap:wrap;margin-top:25px}.mentions span{background:var(--tint);color:var(--brand);border-radius:6px;padding:3px 10px;font-size:12px}.paper-rule{height:1px;background:var(--line);margin:25px 0 15px}.paper-caption{font-size:11px;color:var(--muted)}.linked-event{position:relative;display:flex;align-items:center;gap:13px;background:var(--dark);color:white;border-radius:var(--small-radius);padding:18px 22px;margin:18px -15px 0 58px;transform:rotate(3deg);box-shadow:0 14px 25px #073e431a}.event-icon{color:var(--mint);padding-right:13px;border-right:1px solid #ffffff40}.linked-event strong{display:block;font-size:14px;font-weight:500}.linked-event div>span{display:block;color:#bdd5d0;font-size:11px}.link-mark{margin-left:auto;font-size:25px;color:var(--mint)}.story figcaption{margin-top:29px;font-size:10px;text-align:right;color:var(--muted)}.concept-band{border-block:1px solid var(--line);padding-block:20px;display:flex;gap:24px;align-items:center;font-size:13px;letter-spacing:2px;color:var(--brand)}.concept-band>span[aria-hidden]{color:#a1bbb1}.band-right{margin-left:auto;color:var(--muted);font-size:11px;letter-spacing:.5px}.section{padding-block:var(--section)}h2{font-size:38px;letter-spacing:-1px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:54px}.section-heading>p{font-size:15px;color:var(--muted);max-width:270px}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:36px}.feature{padding:28px 0 0;border-top:1px solid var(--line)}.feature-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}.icon-box{color:var(--brand);width:46px;height:46px;display:grid;place-items:center;background:var(--tint);border-radius:12px}.step-number{font-size:12px;color:#8b9495;font-variant-numeric:tabular-nums}.feature 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span{display:flex;gap:10px;align-items:center;padding:12px 18px;border:1px solid #93b7a866;border-radius:10px;background:#ffffff06}.map-stem{height:36px;width:1px;background:#93b7a866;margin:auto}.map-center{display:flex;align-items:center;gap:14px;background:#f1f7f2;color:var(--dark);border-radius:14px;padding:24px 28px}.map-center strong{font-size:20px}.map-center>span{margin-left:auto;font-size:11px;letter-spacing:1px;color:#58736a}.map-bottom{display:flex;align-items:center;justify-content:center;gap:10px;border:1px solid #93b7a866;border-radius:10px;width:150px;padding:12px;margin:auto}.data-section{display:grid;grid-template-columns:1fr 1fr;gap:120px;align-items:center}.section-copy{color:var(--muted);font-size:15px;margin-top:24px;line-height:2}.text-link{display:inline-flex;align-items:center;gap:12px;color:var(--brand);font-size:14px;font-weight:500;padding-block:8px;border-bottom:1px solid #075a6033}.text-link svg{width:18px}.data-section .text-link{margin-top:24px}.data-item{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid var(--line)}.data-item>svg{margin-top:4px;color:var(--brand)}.data-item h3{font-size:19px;margin-bottom:10px}.data-item p{font-size:14px;color:var(--muted)}.fine{font-size:12px;color:var(--muted);line-height:1.85}.data-items>.fine{margin-top:20px}.plans-section{background:#f0f3ef;border-block:1px solid var(--line);padding-block:80px}.plans-section h2{font-size:32px}.plans-section .section-copy{margin-top:16px}.plans{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:34px 0 22px}.plan{background:#fcfdfa;border:1px solid #dce3dc;border-radius:var(--radius);padding:30px 34px}.plan.pro{background:#e4efed;border-color:#bed1ca}.plan-kicker{display:flex;align-items:center;gap:12px;color:var(--brand);font-size:12px;font-weight:600;letter-spacing:1px}.plan-kicker>span{font-size:9px;letter-spacing:1px;border:1px solid #075a6055;border-radius:4px;padding:0 4px}.plan h3{font-size:24px;margin:14px 0 22px}.plan ul{list-style:none;padding:0;margin:0}.plan li{display:flex;gap:11px;align-items:flex-start;font-size:14px;margin:12px 0}.plan li svg{width:17px;height:22px;color:var(--brand)}.closing{padding-block:100px;text-align:center}.closing img{border-radius:16px;margin-bottom:22px}.closing h2{font-size:40px;line-height:1.45}.closing>p{color:var(--muted);font-size:14px;margin:20px auto 28px;max-width:480px}.closing-actions{display:flex;align-items:center;justify-content:center;gap:24px}.site-footer{background:#f1f3f0;border-top:1px solid var(--line);padding:36px max(48px,calc((100% - var(--page))/2));font-size:12px;color:var(--muted)}.footer-top{display:flex;align-items:center;gap:26px;padding-bottom:30px}.footer-top>.brand{color:var(--ink);font-size:18px}.footer-top>.brand .brand-cn{display:none}.footer-top>a:last-child{margin-left:auto}.footer-bottom{display:flex;justify-content:space-between;gap:24px;padding-top:22px;border-top:1px solid var(--line);font-size:11px}.footer-bottom nav{display:flex;gap:24px}
/* Long-form pages keep the same brand and rhythm with a quieter reading surface. */
.document-hero{padding-block:70px 46px}.document-hero h1{font-size:48px;line-height:1.4;letter-spacing:-1.5px}.document-intro{font-size:16px;color:var(--muted);margin-top:24px;max-width:680px}.document-meta{display:flex;flex-wrap:wrap;gap:12px 28px;font-size:12px;color:var(--muted);margin-top:28px}.document-hero>.fine{margin-top:8px}.privacy-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;background:var(--tint);border-radius:var(--radius);padding:28px 32px}.privacy-summary svg{color:var(--brand);width:22px;height:22px}.privacy-summary h2{font-size:17px;letter-spacing:0;margin:14px 0 6px}.privacy-summary p{font-size:13px;color:var(--muted)}.document-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:76px;padding-block:70px 100px}.toc{position:sticky;top:120px;align-self:start;max-height:calc(100vh - 150px);overflow-y:auto;padding-bottom:12px}.toc>p{font-size:10px;font-weight:600;letter-spacing:2px;color:var(--brand);margin-bottom:16px}.toc nav{display:grid;gap:2px}.toc nav a{display:flex;gap:12px;font-size:12px;color:var(--muted);padding-block:7px}.toc nav a:hover{color:var(--brand)}.toc nav a span{font-size:10px;color:#8d9995;line-height:2.1;font-variant-numeric:tabular-nums}.toc-contact{font-size:11px;color:var(--brand);margin-top:24px;display:block}.policy-section{border-top:1px solid var(--line);padding-top:27px;margin-bottom:40px;scroll-margin-top:110px}.policy-section h2{font-size:23px;letter-spacing:0;display:flex;gap:14px;margin-bottom:20px}.policy-section h2 span{font-size:11px;color:var(--brand);padding-top:6px;line-height:2}.policy-section p{font-size:15px;line-height:2;color:#505a60;margin-block:14px}.policy-section a,.answer a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}.policy-end{background:var(--tint);padding:28px 30px;border-radius:var(--radius)}.policy-end h2{font-size:22px;letter-spacing:0}.policy-end p{font-size:15px;margin-block:10px;overflow-wrap:anywhere}.shortcuts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.shortcut{display:flex;gap:14px;align-items:center;background:var(--tint);padding:22px;border-radius:var(--small-radius);color:var(--brand);transition:background .18s}.shortcut:hover{background:#d9e8e2}.shortcut strong{display:block;font-size:15px;font-weight:600}.shortcut small{display:block;font-size:11px;color:var(--muted);font-weight:400}.shortcut>svg:last-child{width:18px;margin-left:auto}.guide{display:grid;grid-template-columns:1fr 1.15fr;gap:100px;border-bottom:1px solid var(--line)}.guide .fine{margin-top:26px}.guide-steps{list-style:none;padding:0;margin:0}.guide-steps li{display:flex;gap:22px;padding:21px 0;border-bottom:1px solid var(--line)}.guide-steps li:first-child{padding-top:0}.guide-steps li:last-child{border-bottom:0;padding-bottom:0}.guide-steps li>span{font-size:11px;line-height:2.2;color:var(--brand);font-variant-numeric:tabular-nums}.guide-steps h3{font-size:18px;line-height:1.5;margin-bottom:7px}.guide-steps p{font-size:14px;color:var(--muted)}.faq-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:76px}.faq-heading{align-self:start;position:sticky;top:120px}.faq-heading nav{display:grid;margin-top:26px;gap:8px;font-size:13px;color:var(--muted)}.faq-heading nav a{padding-block:3px}.faq-group{scroll-margin-top:110px;margin-bottom:40px}.faq-group h3{font-size:14px;color:var(--brand);margin-bottom:16px}.faq-group details{border-top:1px solid var(--line)}.faq-group details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:24px;justify-content:space-between;font-size:16px;font-weight:500;padding:23px 0;line-height:1.6}summary::-webkit-details-marker{display:none}.disclosure-icon{display:grid;place-items:center;flex-shrink:0;color:var(--brand);width:24px;height:24px}.disclosure-icon svg{width:18px;height:18px;transition:transform .18s}details[open] summary .disclosure-icon svg{transform:rotate(45deg)}.answer{padding:0 30px 24px 0;font-size:14px;color:var(--muted);line-height:1.95}.answer p+p{margin-top:16px}.answer pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.9 var(--font);background:var(--tint);padding:20px;border-radius:10px}.contact-section{border-top:1px solid var(--line);padding-block:70px 100px;display:grid;grid-template-columns:1.1fr 1fr;gap:80px}.contact-section h2{font-size:30px}.contact-section p:not(.eyebrow){font-size:14px;margin-top:20px;color:var(--muted)}.contact-email{font-size:clamp(16px,2.1vw,24px);color:var(--brand);display:inline-block;margin-top:25px;border-bottom:1px solid #075a6033;overflow-wrap:anywhere}.contact-section p.fine{font-size:12px}.feedback-template{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:white}.feedback-template h3{font-size:17px}.feedback-template pre{font:13px/2 var(--font);white-space:pre-wrap;overflow-wrap:anywhere;color:var(--muted);margin-block:18px}.feedback-template .button{font-size:12px;min-height:42px;padding:8px 18px}.feedback-template p.copy-status{margin-top:10px;font-size:12px;min-height:0}.copy-status:empty{display:none}.feedback-actions{display:flex;gap:10px;flex-wrap:wrap}
@media(min-width:1500px){.hero{padding-block:90px;min-height:760px}.hero h1{font-size:64px}}
@media(max-width:1000px){:root{--section:80px}.wrap,.header-inner{width:calc(100% - 64px)}.brand-cn{display:none}.hero{gap:24px;min-height:620px;padding-block:60px}.hero h1{font-size:42px}.story{padding:24px 10px 0}.note-paper{padding:24px}.linked-event{margin-left:25px;margin-right:0}.hero-intro{font-size:15px}.features{gap:24px}.feature>p{min-height:110px}.context-inner{gap:40px}.context-inner h2{font-size:30px}.data-section{gap:60px}.document-layout,.faq-layout{grid-template-columns:190px minmax(0,1fr);gap:40px}.guide{gap:50px}.contact-section{gap:40px}.site-footer{padding-inline:32px}.main-nav{gap:22px}.header-inner{gap:24px}.shortcut{padding:18px;gap:10px}.shortcut>svg:first-child{display:none}}
@media(max-width:720px){:root{--section:64px}.wrap,.header-inner{width:calc(100% - 40px)}.header-inner{min-height:74px;gap:16px;flex-wrap:wrap;padding-block:14px 10px}.brand{font-size:19px;gap:9px}.brand img{width:32px;border-radius:9px}.language{margin-left:auto;padding:6px 0 6px 18px}.main-nav{order:3;width:100%;justify-content:space-between;border-top:1px solid var(--line);padding-top:6px;gap:20px;font-size:12px;margin-left:0}.main-nav a{padding-block:6px}.main-nav a[aria-current=page]:after{display:none}.hero{display:flex;flex-direction:column;align-items:stretch;gap:45px;padding-block:50px 34px;min-height:0}.hero .eyebrow{font-size:10px;letter-spacing:1.6px;margin-bottom:22px}.hero h1{font-size:clamp(34px,8.8vw,48px);letter-spacing:-1.4px;line-height:1.4}.hero-intro{font-size:15px;margin-block:22px 26px}.hero-actions{gap:16px}.hero-foot{margin-top:24px;font-size:11px}.launch{font-size:11px}.button{padding:12px 21px}.story{padding:22px 18px 0;margin-inline:4px;max-width:500px;align-self:center;width:calc(100% - 8px)}.story-grid{inset:0 -6px 20px;transform:none}.story-label{margin-bottom:26px}.note-paper h2{font-size:25px}.note-paper p{font-size:13px}.linked-event{margin-left:35px;margin-right:-9px;padding:15px 17px}.linked-event strong{font-size:13px}.story figcaption{font-size:9px;margin-top:24px}.concept-band{padding-block:16px;gap:19px;font-size:11px;justify-content:center;letter-spacing:1px}.band-right{display:none}h2{font-size:30px;letter-spacing:-.7px}.section-heading{display:block;margin-bottom:32px}.section-heading>p{margin-top:20px;font-size:14px;max-width:none}.features{grid-template-columns:1fr;gap:24px}.feature{padding-top:24px}.feature-top{margin-bottom:16px}.feature h3{font-size:20px}.feature>p{min-height:0;font-size:14px}.feature-caption{margin-top:18px}.context-inner{grid-template-columns:1fr;gap:42px;padding-block:56px}.context-inner h2{font-size:28px}.context-copy{font-size:14px}.connection-map{max-width:380px;justify-self:center;padding-inline:8px}.map-center{padding:22px}.data-section{grid-template-columns:1fr;gap:24px}.data-item{padding-block:24px}.plans-section{padding-block:54px}.plans-section h2{font-size:28px}.plans{grid-template-columns:1fr;gap:16px;margin-top:28px}.plan{padding:26px}.plan h3{font-size:22px}.closing{padding-block:64px}.closing h2{font-size:32px}.closing>p{font-size:14px}.closing-actions{gap:18px}.site-footer{padding:30px 20px}.footer-top{gap:16px;flex-wrap:wrap;padding-bottom:24px}.footer-top>p{font-size:11px}.footer-top>a:last-child{margin-left:0;width:100%}.footer-bottom{display:block;font-size:10px}.footer-bottom nav{margin-top:16px;gap:24px}.document-hero{padding-block:44px 32px}.document-hero h1{font-size:34px;letter-spacing:-1px}.document-intro{font-size:15px;margin-top:20px}.document-meta{font-size:11px;gap:8px 20px}.privacy-summary{grid-template-columns:1fr;padding:24px;gap:22px}.privacy-summary>div{display:grid;grid-template-columns:26px 1fr;column-gap:12px}.privacy-summary svg{grid-row:1/3;margin-top:3px}.privacy-summary h2{font-size:15px;margin:0 0 4px}.privacy-summary p{font-size:12px}.document-layout{display:flex;flex-direction:column;gap:36px;padding-block:38px 60px}.toc{position:static;max-height:none;overflow:visible;width:100%;border-bottom:1px solid var(--line);padding-bottom:24px}.toc nav{grid-template-columns:1fr 1fr;gap:2px 16px}.toc nav a{font-size:11px;gap:8px}.toc-contact{margin-top:16px}.policy-section{padding-top:24px;margin-bottom:32px;scroll-margin-top:140px}.policy-section h2{font-size:21px;gap:10px}.policy-section p{font-size:14px;line-height:2}.policy-end{padding:24px}.shortcuts{grid-template-columns:1fr;gap:10px}.shortcut{padding:17px 20px;gap:16px}.shortcut>svg:first-child{display:block}.shortcut strong{font-size:14px}.shortcut small{font-size:11px}.guide{grid-template-columns:1fr;gap:32px}.guide-steps h3{font-size:17px}.faq-layout{display:block}.faq-heading{position:static;margin-bottom:28px}.faq-heading nav{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:22px;font-size:12px}.faq-group{margin-bottom:32px;scroll-margin-top:145px}.faq-group h3{font-size:13px}summary{font-size:15px;padding-block:20px;gap:12px}.answer{padding-right:0;font-size:14px}.contact-section{grid-template-columns:1fr;gap:30px;padding-block:50px 60px}.contact-section h2{font-size:27px}.contact-email{font-size:20px}.feedback-template{padding:24px}html{scroll-padding-top:140px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.button.primary:hover{transform:none}}
@media print{.site-header,.site-footer,.toc,.privacy-summary,.skip{display:none}body{background:white;color:black}.wrap{width:100%;max-width:none}.document-layout{display:block;padding:20px}.document-hero{padding:20px}.policy-section{break-inside:avoid}a{color:inherit;text-decoration:underline}}