:root{--share-ink:#16332d;--share-ink-soft:#36554d;--share-paper:#f7f3ea;--share-card:#fffdf7;--share-line:#d9d4c7;--share-coral:#c86646;--share-gold:#d8a84e;--share-green:#255f50;--share-shadow:0 22px 70px #23332d1f}.sharing-shell{min-height:100vh;color:var(--share-ink);background:radial-gradient(circle at 85% 10%, #d8a84e21, transparent 22rem), var(--share-paper);font-family:PingFang SC,Microsoft YaHei,Noto Sans CJK SC,sans-serif}.sharing-shell button,.sharing-shell a{font:inherit}.sharing-load-error{color:#8f2821;background:#fcece7;max-width:1100px;margin:20px auto;padding:14px 20px;font-size:14px}.sharing-load-error button{color:inherit;cursor:pointer;background:0 0;border:0;margin-left:12px;text-decoration:underline}.sharing-article-body p{white-space:pre-wrap;overflow-wrap:anywhere}.sharing-rich-body{min-width:0;font-size:16px;line-height:1.8}.sharing-rich-body p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0 0 24px}.sharing-rich-body figure{margin:28px 0}.sharing-rich-body figure img{object-fit:contain;border-radius:8px;max-width:100%;height:auto;max-height:900px;margin:0 auto;display:block}.sharing-rich-body figcaption{text-align:center;color:var(--share-ink-soft);overflow-wrap:anywhere;margin-top:10px;font-size:14px}.sharing-header{z-index:50;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#f7f3eaf0;border-bottom:1px solid #16332d24;justify-content:space-between;align-items:center;gap:32px;height:86px;padding:0 max(28px,50vw - 620px);display:flex;position:sticky;top:0}.sharing-brand{color:var(--share-ink);text-align:left;background:0 0;border:0;flex:none;align-items:center;gap:12px;padding:0;text-decoration:none;display:inline-flex}.sharing-brand-mark{color:#fffdf7;background:var(--share-ink);border-radius:50% 50% 12px;place-items:center;width:45px;height:45px;font-family:STSong,Songti SC,serif;font-size:20px;display:grid}.sharing-brand strong,.sharing-brand small{display:block}.sharing-brand strong{letter-spacing:.12em;font-family:Georgia,Songti SC,serif;font-size:20px}.sharing-brand small{color:#718078;letter-spacing:.08em;margin-top:2px;font-size:10px}.sharing-nav{align-items:stretch;height:100%;display:flex}.sharing-nav-group{display:flex;position:relative}.sharing-nav-group>button{color:#4f645d;background:0 0;border:0;border-bottom:3px solid #0000;justify-content:center;align-items:center;gap:9px;min-width:142px;padding:0 17px;font-size:13px;transition:color .15s,border-color .15s,background .15s;display:flex}.sharing-nav-group>button:hover,.sharing-nav-group>button.active{color:var(--share-ink);border-bottom-color:var(--share-coral);background:#ffffff59}.sharing-nav-group>button span{color:var(--share-coral);font-size:15px;transition:transform .15s}.sharing-nav-group>button[aria-expanded=true] span{transform:rotate(180deg)}.sharing-dropdown{border:1px solid var(--share-line);border-top:3px solid var(--share-coral);background:var(--share-card);width:350px;box-shadow:var(--share-shadow);padding:12px;animation:.15s ease-out sharing-menu-in;position:absolute;top:calc(100% + 1px);right:0}@keyframes sharing-menu-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.sharing-dropdown-heading{border-bottom:1px solid var(--share-line);padding:9px 11px 14px}.sharing-dropdown-heading b,.sharing-dropdown-heading small{display:block}.sharing-dropdown-heading b{font-family:Georgia,Songti SC,serif;font-size:17px;font-weight:500}.sharing-dropdown-heading small{color:#7b8882;margin-top:4px;font-size:11px}.sharing-dropdown>button{width:100%;color:var(--share-ink);text-align:left;background:0 0;border:0;border-bottom:1px solid #ebe7dc;grid-template-columns:68px 1fr;align-items:start;gap:10px;padding:13px 11px;display:grid}.sharing-dropdown>button:last-child{border-bottom:0}.sharing-dropdown>button:hover{background:#f4eee1}.sharing-dropdown>button span{color:var(--share-coral);letter-spacing:.08em;font-size:10px}.sharing-dropdown>button strong{font-size:12px;font-weight:600;line-height:1.55}.sharing-hero{grid-template-columns:1.18fr .82fr;align-items:center;gap:90px;width:min(1240px,100% - 56px);min-height:560px;margin:0 auto;display:grid;position:relative}.sharing-hero:after{content:"";background:linear-gradient(transparent, var(--share-line), transparent);width:1px;height:72%;position:absolute;top:14%;left:59%}.sharing-kicker,.sharing-section-title span{color:var(--share-coral);letter-spacing:.2em;font-size:11px;font-weight:800}.sharing-hero h1{letter-spacing:-.065em;max-width:720px;margin:18px 0 22px;font-family:Georgia,STSong,Songti SC,serif;font-size:clamp(48px,5.4vw,74px);font-weight:500;line-height:1.16}.sharing-hero-copy>p{color:#53675f;max-width:640px;margin:0;font-size:16px;line-height:2}.sharing-featured{background:var(--share-ink);color:#fbf7ed;border-radius:56px 10px;flex-direction:column;align-items:flex-start;min-height:325px;padding:38px;display:flex;box-shadow:24px 26px #c866461a}.sharing-featured-index{color:#b9c7c1;letter-spacing:.14em;font-size:10px}.sharing-featured p{color:#e5b469;letter-spacing:.12em;margin:42px 0 10px;font-size:11px}.sharing-featured h2{margin:0;font-family:Georgia,Songti SC,serif;font-size:28px;font-weight:500;line-height:1.55}.sharing-featured button{color:#fff9ed;background:0 0;border:0;border-bottom:1px solid #e7d3ad;margin-top:auto;padding:10px 0 4px;font-size:12px}.sharing-featured button span{margin-left:14px}.sharing-directory{background:var(--share-ink);color:#fbf7ed;padding:72px max(28px,50vw - 620px) 82px}.sharing-section-title{justify-content:space-between;align-items:end;gap:35px;margin-bottom:34px;display:flex}.sharing-section-title h2{margin:8px 0 0;font-family:Georgia,Songti SC,serif;font-size:35px;font-weight:500}.sharing-section-title p{color:#aebdb6;max-width:480px;margin:0;font-size:12px;line-height:1.8}.sharing-category-tabs{border-left:1px solid #49625a;grid-template-columns:repeat(4,1fr);display:grid}.sharing-category-tabs button{color:#fbf7ed;text-align:left;background:0 0;border:0;border-right:1px solid #49625a;flex-direction:column;align-items:flex-start;min-height:205px;padding:24px;transition:background .16s,color .16s;display:flex}.sharing-category-tabs button:hover,.sharing-category-tabs button.active{color:var(--share-ink);background:#f4ead7}.sharing-category-tabs button>span{opacity:.72;border:1px solid;border-radius:50%;place-items:center;width:32px;height:32px;font-family:Georgia,serif;font-size:11px;display:grid}.sharing-category-tabs strong{margin-top:auto;font-family:Georgia,Songti SC,serif;font-size:19px;font-weight:500}.sharing-category-tabs small{color:#aebdb6;margin-top:8px;font-size:10px;line-height:1.6}.sharing-category-tabs button:hover small,.sharing-category-tabs button.active small{color:#6c7c75}.sharing-category-page{width:min(1180px,100% - 48px);min-height:calc(100vh - 206px);margin:0 auto;padding:54px 0 100px}.sharing-category-intro{border:1px solid #b4aa9694;border-top:3px solid var(--share-coral);background:var(--share-card);border-radius:18px;grid-template-columns:54px 1fr auto;align-items:center;gap:24px;min-height:178px;padding:34px 40px;display:grid;box-shadow:0 16px 44px #2a373112}.sharing-category-intro>span{background:var(--share-ink);color:#fffaf0;border-radius:50%;place-items:center;width:50px;height:50px;font-family:Georgia,Songti SC,serif;font-size:13px;display:grid}.sharing-category-intro p{color:var(--share-coral);letter-spacing:.08em;margin:0 0 6px;font-size:10px;font-weight:700}.sharing-category-intro h1{margin:0;font-family:Georgia,Songti SC,serif;font-size:32px;font-weight:500}.sharing-category-intro small{color:#78857f;margin-top:8px;font-size:11px;display:block}.sharing-category-intro>b{color:#7b8781;font-size:11px;font-weight:500}.sharing-simple-list{background:0 0;border:0;gap:18px;margin-top:26px;display:grid}.sharing-simple-list>button{background:var(--share-card);width:100%;min-height:128px;color:var(--share-ink);text-align:left;border:1px solid #b4aa9694;border-radius:15px;grid-template-columns:42px 84px minmax(0,1fr) 90px 22px;align-items:center;gap:20px;padding:24px 28px;transition:background .16s,border-color .16s,box-shadow .16s,transform .16s;display:grid;box-shadow:0 9px 28px #2a37310e}.sharing-simple-list>button:hover,.sharing-simple-list>button:focus-visible{background:#fffaf0;border-color:#c866468c;transform:translateY(-3px);box-shadow:0 18px 42px #2a37311c}.sharing-simple-list>button:focus-visible{outline:2px solid var(--share-coral);outline-offset:-3px}.sharing-list-number{color:#98a39e;font-family:Georgia,serif;font-size:12px}.sharing-list-tag{color:#ae5437;letter-spacing:.06em;background:#f5e5dc;border-radius:999px;justify-self:start;padding:6px 10px;font-size:10px;font-weight:700}.sharing-list-copy strong,.sharing-list-copy small,.sharing-list-meta time,.sharing-list-meta small{display:block}.sharing-list-copy strong{font-family:Georgia,Songti SC,serif;font-size:19px;font-weight:500;line-height:1.5}.sharing-list-copy small{color:#6d7b75;margin-top:7px;font-size:11px;line-height:1.65}.sharing-list-meta{color:#77847e;text-align:right}.sharing-list-meta time{font-size:10px}.sharing-list-meta small{margin-top:7px;font-size:10px}.sharing-list-arrow{color:var(--share-coral);font-size:18px;transition:transform .16s}.sharing-simple-list>button:hover .sharing-list-arrow{transform:translate(4px)}.sharing-feed{width:min(1160px,100% - 56px);margin:0 auto;padding:84px 0 110px}.sharing-feed-heading{border-bottom:1px solid var(--share-line);justify-content:space-between;align-items:end;padding-bottom:22px;display:flex}.sharing-feed-heading>div{align-items:center;gap:17px;display:flex}.sharing-feed-heading span{color:#835b27;background:#e8dcc3;border-radius:50%;place-items:center;width:42px;height:42px;font-size:11px;display:grid}.sharing-feed-heading h2{margin:0;font-family:Georgia,Songti SC,serif;font-size:31px;font-weight:500}.sharing-feed-heading>p{color:#7a8781;margin:0;font-size:11px}.sharing-post-list{gap:18px;padding-top:24px;display:grid}.sharing-post-card{border:1px solid var(--share-line);background:var(--share-card);grid-template-columns:235px 1fr;min-height:245px;transition:transform .17s,box-shadow .17s;display:grid;overflow:hidden}.sharing-post-card:hover{box-shadow:var(--share-shadow);transform:translateY(-3px)}.sharing-post-visual{color:#fff;flex-direction:column;justify-content:space-between;padding:24px;display:flex}.sharing-post-visual span{opacity:.75;font-family:Georgia,serif;font-size:12px}.sharing-post-visual b{letter-spacing:.1em;font-family:Georgia,STSong,Songti SC,serif;font-size:38px;font-weight:500}.visual-books{background:#7f503d}.visual-math{background:#315c65}.visual-chinese{background:#8b6738}.visual-english{background:#435c43}.sharing-post-copy{flex-direction:column;align-items:flex-start;padding:27px 32px 24px;display:flex}.sharing-post-meta{color:#7d8983;justify-content:space-between;gap:20px;width:100%;font-size:10px;display:flex}.sharing-post-meta span{color:var(--share-coral);letter-spacing:.1em;font-weight:700}.sharing-post-copy h3{margin:23px 0 10px;font-family:Georgia,Songti SC,serif;font-size:23px;font-weight:500;line-height:1.45}.sharing-post-copy>p{color:#5e7069;max-width:720px;margin:0;font-size:13px;line-height:1.8}.sharing-post-copy>button{border:0;border-bottom:1px solid var(--share-ink);color:var(--share-ink);background:0 0;margin-top:auto;padding:9px 0 2px;font-size:11px}.sharing-post-copy>button span{margin-left:12px}.sharing-article{width:min(940px,100% - 48px);margin:0 auto;padding:54px 0 110px}.sharing-back{color:#65766f;background:0 0;border:0;padding:8px 0;font-size:12px}.sharing-back:hover{color:var(--share-coral)}.sharing-article-head{border:1px solid var(--share-line);background:var(--share-card);text-align:center;margin-top:25px;padding:72px 7% 55px}.sharing-article-head>p{color:var(--share-coral);letter-spacing:.1em;margin:0 0 18px;font-size:11px;font-weight:700}.sharing-article-head h1{letter-spacing:-.045em;margin:0 auto;font-family:Georgia,STSong,Songti SC,serif;font-size:clamp(35px,5vw,55px);font-weight:500;line-height:1.35}.sharing-article-meta{color:#77847e;justify-content:center;gap:25px;margin-top:29px;font-size:10px;display:flex}.sharing-article>blockquote{border-left:1px solid var(--share-line);border-right:1px solid var(--share-line);text-align:center;background:#efe4cf;margin:0;padding:45px 12%;font-family:Georgia,Songti SC,serif;font-size:21px;line-height:1.8}.sharing-article-body{border:1px solid var(--share-line);background:var(--share-card);padding:65px 9%}.sharing-article-body section+section{margin-top:52px}.sharing-article-body h2{margin:0 0 17px;font-family:Georgia,Songti SC,serif;font-size:26px;font-weight:500}.sharing-article-body p{color:#445a52;margin:0 0 18px;font-size:15px;line-height:2.05}.sharing-takeaways{border-left:4px solid var(--share-coral);background:#f4eee2;margin-top:56px;padding:28px 31px}.sharing-takeaways>span{color:var(--share-coral);letter-spacing:.1em;font-size:11px;font-weight:800}.sharing-takeaways ul{margin:17px 0 0;padding-left:20px}.sharing-takeaways li{color:#445a52;margin:9px 0;font-size:13px;line-height:1.65}.sharing-article-footer{background:var(--share-ink);color:#dbe3df;justify-content:space-between;align-items:center;gap:25px;padding:23px 28px;display:flex}.sharing-article-footer span{font-size:10px}.sharing-article-footer button{color:#fff;background:0 0;border:0;border-bottom:1px solid #dbe3df;padding:8px 0;font-size:11px}.sharing-footer{border-top:1px solid var(--share-line);justify-content:space-between;align-items:center;gap:30px;min-height:120px;padding:30px max(28px,50vw - 620px);display:flex}.sharing-footer strong,.sharing-footer span{display:block}.sharing-footer strong{font-family:Georgia,Songti SC,serif;font-size:18px}.sharing-footer span,.sharing-footer p{color:#7b8983;margin:4px 0 0;font-size:10px}.sharing-footer-meta{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.sharing-footer-meta a{color:#65756e;text-decoration:none}.sharing-footer-meta a:hover{color:var(--share-accent);text-decoration:underline}@media (width<=1080px){.sharing-header{flex-direction:column;align-items:flex-start;gap:12px;height:auto;padding-top:16px}.sharing-nav{width:100%;overflow-x:auto}.sharing-nav-group{flex:1 0 190px}.sharing-nav-group>button{width:100%;height:54px}.sharing-dropdown{width:auto;max-height:calc(100vh - 165px);position:fixed;top:138px;left:24px;right:24px;overflow-y:auto}.sharing-hero{grid-template-columns:1fr;gap:34px;padding:72px 0}.sharing-hero:after{display:none}.sharing-featured{width:min(620px,100%);min-height:290px}.sharing-category-tabs{grid-template-columns:repeat(2,1fr)}.sharing-category-tabs button{border-bottom:1px solid #49625a}}@media (width<=680px){.sharing-header{padding-left:18px;padding-right:18px}.sharing-brand small{display:none}.sharing-nav-group{flex-basis:165px}.sharing-nav-group>button{min-width:165px;padding:0 9px;font-size:12px}.sharing-dropdown{padding:8px;top:125px;left:12px;right:12px}.sharing-hero{width:min(100% - 32px,1240px);min-height:0;padding:60px 0 66px}.sharing-hero h1{font-size:43px}.sharing-hero-copy>p{font-size:14px}.sharing-featured{border-radius:38px 8px;min-height:310px;padding:29px}.sharing-directory{padding:58px 18px 64px}.sharing-section-title{flex-direction:column;align-items:flex-start}.sharing-category-tabs{grid-template-columns:1fr}.sharing-category-tabs button{min-height:150px}.sharing-category-page{width:calc(100% - 28px);padding:26px 0 72px}.sharing-category-intro{grid-template-columns:44px 1fr;gap:16px;padding:25px 21px}.sharing-category-intro>span{width:42px;height:42px}.sharing-category-intro>b{display:none}.sharing-category-intro h1{font-size:25px}.sharing-simple-list>button{grid-template-columns:34px 1fr 20px;gap:12px;min-height:0;padding:22px 18px}.sharing-list-number{grid-area:1/1/span 2;align-self:start;padding-top:4px}.sharing-list-tag,.sharing-list-copy{grid-column:2}.sharing-list-copy strong{font-size:17px}.sharing-list-meta{text-align:left;grid-column:2;gap:12px;margin-top:4px;display:flex}.sharing-list-meta small{margin-top:0}.sharing-list-arrow{grid-area:1/3/span 3}.sharing-feed{width:calc(100% - 32px);padding:62px 0 78px}.sharing-post-card{grid-template-columns:1fr}.sharing-post-visual{min-height:135px}.sharing-post-visual b{font-size:30px}.sharing-post-copy{min-height:270px;padding:24px}.sharing-post-copy h3{font-size:21px}.sharing-article{width:calc(100% - 28px);padding-top:28px}.sharing-article-head{padding:50px 20px 42px}.sharing-article-head h1{font-size:34px}.sharing-article>blockquote{padding:33px 25px;font-size:18px}.sharing-article-body{padding:45px 24px}.sharing-article-meta{flex-wrap:wrap;gap:9px 18px}.sharing-article-footer,.sharing-footer{flex-direction:column;align-items:flex-start}}@media (prefers-reduced-motion:reduce){.sharing-shell *,.sharing-shell :before,.sharing-shell :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}