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:root{--edu-ink:#1d3038;--edu-muted:#687981;--edu-line:#dce5e7;--edu-paper:#fff;--edu-ground:#f4f7f7;--edu-accent:#236a79;--edu-accent-dark:#164e5d;--edu-soft:#e7f0f1;--edu-width:1200px;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;color:var(--edu-ink);background:var(--edu-ground);font-synthesis:none;text-rendering:optimizeLegibility}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--edu-ground);font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}a:hover{color:var(--edu-accent)}button,input{font:inherit}.edu-container{width:min(var(--edu-width),calc(100% - 48px));margin-inline:auto}.edu-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.edu-skip{position:absolute;z-index:10;top:-60px;left:20px;padding:10px 16px;background:#fff;color:var(--edu-ink);border:2px solid var(--edu-accent)}.edu-skip:focus{top:12px;outline:0}.edu-topline{height:34px;background:#edf2f2;border-bottom:1px solid #e3e9e9;color:#52666e;font-size:12px}.edu-topline .edu-container{height:100%;display:flex;align-items:center;justify-content:space-between}.edu-header{background:#fff}.edu-masthead{height:94px;display:flex;align-items:center;justify-content:space-between;gap:30px}.edu-brand{display:flex;align-items:center;gap:13px;min-width:220px}.edu-brand-mark{width:48px;height:48px;display:grid;place-items:center;background:var(--edu-accent);color:white;font-size:24px;font-weight:800;letter-spacing:2px}.edu-brand strong,.edu-brand small{display:block}.edu-brand strong{font-size:23px;letter-spacing:.04em;line-height:1.2}.edu-brand small{margin-top:5px;color:var(--edu-muted);font-size:12px;letter-spacing:.12em}.edu-search{width:min(390px,42vw);height:42px;display:flex;border:1px solid #ccd8db;background:#fbfcfc}.edu-search:focus-within{border-color:var(--edu-accent);box-shadow:0 0 0 3px #236a791c}.edu-search input{flex:1;min-width:0;border:0;outline:0;padding:0 13px;background:transparent;color:var(--edu-ink)}.edu-search input::placeholder{color:#849399}.edu-search button{width:46px;border:0;background:var(--edu-accent);color:white;display:grid;place-items:center;cursor:pointer}.edu-search button:hover{background:var(--edu-accent-dark)}.edu-search svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}.edu-nav{border-top:1px solid #edf0f1;border-bottom:1px solid #dfe6e8}.edu-nav .edu-container{display:flex;gap:0;overflow-x:auto;scrollbar-width:thin}.edu-nav a{flex:none;min-height:54px;padding:14px 22px 12px;font-size:15px;white-space:nowrap;border-bottom:3px solid transparent}.edu-nav a:first-child{padding-left:0}.edu-nav a:hover,.edu-nav a:focus-visible{color:var(--edu-accent);border-color:var(--edu-accent)}.edu-main{padding-top:26px;padding-bottom:54px}.edu-lead{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:20px;min-height:375px}.edu-lead-list,.edu-feature,.edu-reading-main,.edu-aside-card,.edu-matrix-item{background:var(--edu-paper)}.edu-lead-list{padding:25px 27px 19px;border-top:3px solid var(--edu-accent)}.edu-section-head{display:flex;align-items:end;justify-content:space-between;gap:18px}.edu-kicker{display:block;color:var(--edu-accent);font-size:12px;font-weight:750;letter-spacing:.1em}.edu-section-head h1,.edu-section-head h2,.edu-aside-heading h2{margin:4px 0 0;font-size:24px;line-height:1.35;letter-spacing:-.025em}.edu-head-note{color:var(--edu-muted);font-size:12px;white-space:nowrap}.edu-lead-list ol{list-style:none;margin:19px 0 0;padding:0}.edu-lead-list li{min-height:54px;display:grid;grid-template-columns:8px minmax(0,1fr) auto;align-items:center;gap:11px;border-top:1px solid #edf1f1}.edu-lead-dot{width:6px;height:6px;border-radius:50%;background:#7b9da4}.edu-lead-list li a{font-size:15px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.edu-lead-list time,.edu-picks time,.edu-story time{color:#8b989d;font-size:12px;white-space:nowrap}.edu-feature{display:flex;flex-direction:column;min-width:0}.edu-feature-image{position:relative;display:block;height:225px;overflow:hidden;background:#dce8e9}.edu-feature-image img,.edu-story-image img{width:100%;height:100%;object-fit:cover;display:block}.edu-feature-image img{transition:transform .35s ease}.edu-feature-image:hover img{transform:scale(1.025)}.edu-image-label{position:absolute;bottom:12px;left:14px;padding:4px 10px;background:#163f4fdc;color:#fff;font-size:12px}.edu-feature-copy{padding:13px 22px 18px}.edu-feature-copy h2{margin:4px 0 6px;font-size:22px;line-height:1.42;letter-spacing:-.025em}.edu-feature-copy p{margin:0 0 8px;color:var(--edu-muted);font-size:13px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.edu-read-link{display:inline-flex;align-items:center;gap:9px;color:var(--edu-accent);font-size:13px;font-weight:700}.edu-read-link span{font-size:17px}.edu-feature-empty{justify-content:center;align-items:flex-start;padding:40px}.edu-empty-mark{width:58px;height:58px;display:grid;place-items:center;background:var(--edu-soft);color:var(--edu-accent);font-size:27px;font-weight:800}.edu-feature-empty h2{margin:17px 0 4px;font-size:23px}.edu-feature-empty p,.edu-empty-inline{margin:0;color:var(--edu-muted);font-size:14px}.edu-quick-links{margin-top:17px;display:flex;align-items:center;gap:8px;overflow-x:auto;padding:11px 14px;background:#fff;border:1px solid var(--edu-line);scrollbar-width:thin}.edu-quick-links>span{color:var(--edu-muted);font-size:12px;white-space:nowrap;padding:0 9px 0 2px}.edu-quick-links a{flex:none;padding:7px 12px;background:#f2f6f6;color:#334b54;font-size:13px;font-weight:650;white-space:nowrap}.edu-quick-links a span{margin-left:8px;color:#83979d}.edu-quick-links a:hover{background:var(--edu-soft);color:var(--edu-accent-dark)}.edu-reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:20px;margin-top:27px}.edu-reading-main{min-width:0;padding:24px 27px 21px}.edu-reading-title{align-items:center;flex-wrap:wrap}.edu-tab-controls{display:flex;gap:4px;max-width:100%;overflow-x:auto;scrollbar-width:thin}.edu-tab-controls button{flex:none;min-height:42px;padding:7px 13px;border:0;border-bottom:2px solid transparent;background:transparent;color:#5b6a70;font-size:13px;font-weight:650;cursor:pointer}.edu-tab-controls button[aria-selected="true"]{color:var(--edu-accent-dark);border-color:var(--edu-accent);background:#f2f7f7}.edu-tab-controls button:hover{color:var(--edu-accent)}button:focus-visible,a:focus-visible{outline:3px solid #398a9b;outline-offset:3px}.edu-tab-panel{padding-top:12px}.edu-tab-panel[hidden]{display:none}.edu-story{padding:16px 0;border-top:1px solid var(--edu-line)}.edu-story-lead{display:grid;grid-template-columns:220px minmax(0,1fr);gap:18px;align-items:center}.edu-story-image{display:block;aspect-ratio:1.58;overflow:hidden;background:#e7eff0}.edu-story-image img{transition:transform .3s ease}.edu-story-image:hover img{transform:scale(1.025)}.edu-story-category{color:var(--edu-accent);font-size:12px;font-weight:700}.edu-story h3{margin:3px 0 5px;font-size:17px;line-height:1.5}.edu-story p{margin:0 0 6px;color:var(--edu-muted);font-size:13px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.edu-story time{display:block}.edu-more{display:flex;justify-content:space-between;align-items:center;padding:11px 13px;background:#f2f6f6;color:var(--edu-accent-dark);font-size:13px;font-weight:700}.edu-more:hover{background:var(--edu-soft)}.edu-reading-aside{display:grid;gap:14px}.edu-aside-card{padding:22px 21px;border-top:3px solid #78979d}.edu-aside-heading{padding-bottom:12px;border-bottom:1px solid var(--edu-line)}.edu-aside-heading h2{font-size:21px}.edu-picks{list-style:none;margin:0;padding:0}.edu-picks li{padding:13px 0 11px;border-bottom:1px solid #edf1f1}.edu-picks li:last-child{border-bottom:0}.edu-picks a{display:block;font-size:14px;font-weight:600;line-height:1.5}.edu-picks time{display:block;margin-top:4px}.edu-directory-cta{position:relative;display:flex;flex-direction:column;gap:4px;min-height:125px;padding:20px 22px;background:var(--edu-accent-dark);color:#fff}.edu-directory-cta:hover{color:#fff;background:#123e4a}.edu-directory-cta>span:first-child{font-size:12px;color:#c6d9dd}.edu-directory-cta strong{font-size:21px}.edu-directory-arrow{position:absolute;right:20px;bottom:17px;font-size:20px}.edu-empty-state{margin:18px 0;padding:25px;background:#f6f8f8;color:var(--edu-muted);text-align:center;font-size:14px}.edu-category-matrix{margin-top:29px}.edu-category-matrix>.edu-section-head{margin-bottom:14px}.edu-category-matrix>.edu-section-head p{margin:0;color:var(--edu-muted);font-size:12px}.edu-matrix-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.edu-matrix-item{padding:18px 20px 14px;border-top:2px solid #b5c8cc}.edu-matrix-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}.edu-matrix-head h3{margin:0;font-size:17px}.edu-matrix-head>a{color:var(--edu-accent);font-size:12px;white-space:nowrap}.edu-matrix-item ul{list-style:none;padding:0;margin:9px 0 0}.edu-matrix-item li{position:relative;padding:7px 0 7px 12px;border-top:1px solid #eef1f1}.edu-matrix-item li:before{content:"";position:absolute;left:0;top:17px;width:4px;height:4px;background:#8aa7ac;border-radius:50%}.edu-matrix-item li a{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.edu-matrix-item>p{margin:10px 0 2px;color:var(--edu-muted);font-size:13px}.edu-footer{background:#1c343c;color:#d7e2e4}.edu-footer-inner{min-height:145px;padding:27px 0;display:grid;grid-template-columns:1fr auto;align-content:center;column-gap:20px}.edu-footer-brand{font-size:19px;font-weight:750;color:#fff}.edu-footer-inner p{grid-column:1;margin:2px 0;color:#b3c4c8;font-size:13px}.edu-footer-inner small{grid-column:2;grid-row:1/3;align-self:center;color:#a9bbc0;font-size:12px}
@media(max-width:900px){.edu-container{width:min(var(--edu-width),calc(100% - 32px))}.edu-lead{grid-template-columns:1fr 1fr;min-height:0}.edu-lead-list{padding:21px}.edu-section-head h1,.edu-section-head h2{font-size:21px}.edu-lead-list li{min-height:58px;grid-template-columns:7px minmax(0,1fr)}.edu-lead-list time{display:none}.edu-feature-image{height:215px}.edu-feature-copy h2{font-size:19px}.edu-reading-layout{grid-template-columns:minmax(0,1fr) 250px;gap:14px}.edu-reading-main{padding:21px}.edu-tab-controls{width:100%}.edu-story-lead{grid-template-columns:180px minmax(0,1fr);gap:14px}}
@media(max-width:640px){body{font-size:14px}.edu-container{width:calc(100% - 28px)}.edu-topline{height:31px}.edu-topline .edu-container span:last-child{display:none}.edu-masthead{height:auto;min-height:83px;gap:12px}.edu-brand{min-width:0;gap:9px}.edu-brand-mark{width:40px;height:40px;font-size:20px}.edu-brand strong{font-size:19px}.edu-brand small{font-size:10px}.edu-search{width:min(170px,44vw);height:40px;flex:none;border:1px solid #d8e2e4;background:#fbfcfc}.edu-search input{position:static;width:auto;height:auto;min-width:0;overflow:visible;clip:auto;font-size:12px;padding:0 8px}.edu-search input::placeholder{font-size:11px}.edu-search button{width:38px;flex:none;background:#eef4f4;color:var(--edu-accent-dark)}.edu-search button:hover{color:#fff}.edu-nav .edu-container{width:100%;padding:0 14px}.edu-nav a{min-height:48px;padding:12px 15px 10px;font-size:14px}.edu-nav a:first-child{padding-left:4px}.edu-main{padding-top:15px;padding-bottom:36px}.edu-lead{display:flex;flex-direction:column;gap:12px}.edu-feature{order:-1}.edu-feature-image{height:auto;aspect-ratio:1.68}.edu-feature-copy{padding:12px 15px 15px}.edu-feature-copy h2{font-size:19px}.edu-feature-copy p{font-size:13px}.edu-lead-list{padding:19px 16px 13px}.edu-section-head h1,.edu-section-head h2{font-size:20px}.edu-head-note{font-size:11px}.edu-lead-list ol{margin-top:12px}.edu-lead-list li{min-height:53px;gap:9px}.edu-lead-list li a{font-size:14px}.edu-quick-links{margin-top:12px;padding:8px 10px;gap:6px}.edu-quick-links>span{padding-right:5px}.edu-quick-links a{padding:7px 10px;font-size:12px}.edu-reading-layout{display:flex;flex-direction:column;gap:12px;margin-top:20px}.edu-reading-main{width:100%;padding:18px 15px 15px}.edu-reading-title{align-items:flex-start}.edu-tab-controls{order:2;flex-wrap:nowrap;margin-top:6px;padding-bottom:3px}.edu-tab-controls button{min-height:42px;padding:7px 11px;font-size:12px}.edu-story-lead{grid-template-columns:112px minmax(0,1fr);gap:12px}.edu-story-image{aspect-ratio:1.15}.edu-story h3{font-size:15px}.edu-story p{display:none}.edu-story time{font-size:11px}.edu-story{padding:13px 0}.edu-reading-aside{width:100%;grid-template-columns:1fr}.edu-aside-card{padding:18px}.edu-directory-cta{min-height:100px;padding:16px 18px}.edu-category-matrix{margin-top:22px}.edu-category-matrix>.edu-section-head{align-items:flex-start;flex-direction:column;gap:4px}.edu-matrix-grid{grid-template-columns:1fr;gap:9px}.edu-matrix-item{padding:15px 16px 12px}.edu-matrix-item li{padding-block:8px}.edu-footer-inner{min-height:125px;grid-template-columns:1fr;gap:2px}.edu-footer-inner small{grid-column:1;grid-row:auto;margin-top:9px}.edu-footer-brand{font-size:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}