:root{--base-font:"Gotham A","Gotham B",Dubai,Helvetica,Arial,微软雅黑,正黑体,SimHei,SimSun,"Pingfang SC","Heiti SC",STHeiti,STSong,Hei,"Droid Sans Fallback","Arial Unicode MS",隶书,宋体,"WenQuanYi Micro Hei",文泉驿微米黑,"AR PL UKai CN";--base-font-size:16px;--bg-color-grey-subtle:#f2f6fb;--bg-color-grey-subtle-200:#e4e4e4;--bg-color-grey-cool:#ecf3f7;--bg-color-grey-cool-opacity:#f2f6fbf4;--bg-color-grey-cool-opacity-low:#f2f6fb66;--bg-color-grey-cool-50:#f2f6fb;--bg-color-grey-cool-100:#ecf3f7;--bg-color-grey-cool-200:#cddbe6;--bg-color-grey-cool-300:#b9cada;--bg-color-grey-cool-light:#f8f8f8;--bg-color-blue:#080047;--bg-color-blue-opacity:#08004722;--bg-color-blue-opacity-high:#080047c4;--bg-color-blue-opacity-medium:#08004780;--bg-color-pink:#e40d75;--bg-color-pink-50:#fce5ef;--bg-color-green:#06d7bb;--text-color-base:#353b45;--text-color-grey:#63727f;--text-color-grey-600:#869caf;--text-color-grey-inactive:#adadad;--text-color-blue:#080047;--text-color-pink:#e40d75;--text-color-pink-hover:#b70b6a;--text-color-green:#06d7bb;--text-color-success:#299764;--text-color-error:#d92d20;--text-color-warning:#dc6803;--icon-color-grey:#869caf;--icon-color-grey-hover:#738696;--border-color-grey:#b9cada;--border-color-green:#06d7bb;--border-color-pink:#e40d75;--separator-color:#a7bbce;--separator-color-opacity:#a7bbce33;--button-color-pink:#e40d75;--button-color-pink-hover:#cd0d6f;--button-color-pink-active:#b70b6a;--button-color-grey:#f2f6fb;--box-shadow-color:#353b451a;--gutter-xxl:0.75rem;--gutter-xl:0.75rem;--gutter-lg:0.5rem;--gutter-md:0.5rem;--gutter-sm:0.5rem;--gutter:0.5rem;--max-width:1200px;--max-width-xxl:1440px;--position-sticky-offset:103px}.page-section.page-section-blog-header{padding:2.5rem 0}.page-section.page-section-blog-post-header{padding:2.5rem 0 9.5rem}.post-body .h2,.post-body h2{font-size:1.625rem;line-height:1.25}.post-body h3{font-size:1.125rem;line-height:1.3}.post-body h4{font-size:1rem}.blog-post-featured-image{margin-bottom:2.5rem;margin-top:-8rem;min-width:100%}.blog-tag-label{background-color:var(--bg-color-grey-cool-200);color:var(--text-color-base);display:inline-block;font-size:.75rem;font-weight:700;padding:.5rem;text-transform:uppercase}.blog-tag-label i{margin-inline-start:.25rem}.blog-tag-label.blog-tag-label-white{background-color:#fff}.blog-tag-label.blog-tag-label-white i{color:var(--text-color-pink);margin-inline-start:.25rem}.blog-desktop-social-share-wrapper{display:none}.blog-anchors-dropdown-container{z-index:100}@media screen and (min-width:990px){.page-section.page-section-blog-header{padding:5rem 0}.page-section.page-section-blog-post-header{padding:5rem 0 11.5rem}.blog-post-featured-image{margin-top:-10rem}.post-body .h2,.post-body h2{font-size:2.375rem;line-height:1.11}.post-body .h3,.post-body h3{font-size:1.625rem;line-height:1.25}.post-body .h4,.post-body h4{font-size:1.125rem;line-height:1.3}.blog-anchors-dropdown-container{display:none}.blog-anchors-menu-wrapper:not(.open){max-height:200px;overflow:hidden;position:relative}.blog-anchors-menu-wrapper:not(.open):after{background-image:linear-gradient(180deg,hsla(0,0%,100%,0) 0,hsla(0,0%,100%,.6) 30%,#fff);bottom:0;content:"";display:block;height:2.5rem;position:absolute;width:100%}.blog-anchors-menu-wrapper{display:block;max-height:calc(100vh - 1.5rem);overflow:auto}.blog-anchors-menu-wrapper~.anchors-toggle-btn{background-color:var(--bg-color-grey-cool);border:0;cursor:pointer;font-family:var(--base-font);font-size:1rem;padding:.75rem;width:100%}.blog-desktop-social-share-wrapper{box-sizing:border-box;display:flex;height:100%;justify-content:flex-end;left:0;padding-right:min(3rem,50%);pointer-events:none;position:absolute;top:80px;width:calc((100% - var(--max-width))/2)}.blog-desktop-social-share-container{align-items:center;align-self:flex-start;display:flex;flex-direction:column;gap:.75rem;pointer-events:auto;position:sticky;top:calc(var(--position-sticky-offset) + 1rem)}.blog-desktop-social-share-container .social-sharing-container{flex-direction:column}}@media screen and (min-width:1600px){.blog-desktop-social-share-wrapper{width:calc((100% - var(--max-width-xxl))/2)}}.blog-listing-container article .blog-listing-featured-image{aspect-ratio:2/1;object-fit:cover;width:100%}.blog-listing-block{position:relative;z-index:-1}.blog-listing-subscribe-container label{color:#fff}.blog-category{color:var(--text-color-pink);font-size:1rem}.comment-reply-to.hs-button:hover{background-color:transparent}.comment-reply-to.hs-button em{margin-left:5px}.comment.depth-0{border-bottom:1px solid var(--separator-color);border-top:0!important;padding:2rem 0}.comment.depth-0:last-of-type{margin-bottom:2rem}.bg-tender{background-image:url(https://2509857.fs1.hubspotusercontent-na1.net/hubfs/2509857/o2-Website%202023%20Assets/o2-Website%202023-Design%20Assets/defaults/img-header-default-bg.webp);background-size:cover}.ccm-block-share-this-page{margin-top:1.5rem}.ccm-block-share-this-page ul{display:flex;list-style:none;margin:0 -.5rem;padding:0}.ccm-block-share-this-page ul li{margin:.5rem}.ccm-block-share-this-page ul li a{align-items:center;background-color:var(--bg-color-grey-cool);border-radius:100%;color:var(--text-color-base);display:inline-flex;font-size:.875rem;height:2rem;justify-content:center;text-decoration:none;width:2rem}.blog-anchors-menu-container a{border-bottom:1px solid var(--border-color-grey);display:block;font-weight:500;padding:.5rem 0}.blog-anchors-menu-container a:not(.active){color:var(--text-base)}