/* 从原公共样式保留基础与外壳规则，删除旧业务专用选择器。 */
:root{--paper: #f7f5ef; --ink: #282b28; --muted: #686b62; --line: #d9d8cd; --red: #a54132; --wash: #eee8de; --serif: "Songti SC","Noto Serif CJK SC","STSong",serif; --sans: "PingFang SC","Microsoft YaHei",sans-serif; --green: #4e614d;}
*{box-sizing: border-box;}
html{scroll-behavior: smooth;}
body{margin: 0px; background: var(--paper); color: var(--ink); font: 15px/1.75 var(--sans); -webkit-font-smoothing: antialiased;}
a{color: inherit; text-decoration: none;}
button,input,textarea,select{font: inherit;}
button,a,input,textarea,select{-webkit-tap-highlight-color: transparent;}
button{cursor: pointer;}
a,button{touch-action: manipulation;}
button{color: inherit;}
button:disabled{cursor: not-allowed; opacity: 0.6;}
:focus-visible{outline: 2px solid var(--red); outline-offset: 4px;}
a:hover{color: var(--red);}
button:hover{filter: brightness(0.96);}
input,textarea,select{max-width: 100%;}
::selection{background: rgb(222, 194, 171);}
.icon-library{position: absolute; width: 0px; height: 0px; overflow: hidden;}
.icon{width: 21px; height: 21px; stroke: currentcolor; fill: none; stroke-width: 1.55; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0;}
.skip{position: fixed; top: -70px; left: 20px; z-index: 100; background: var(--ink); color: white; padding: 10px 18px;}
.skip:focus{top: 10px;}
.sidebar{position: fixed; inset: 0px auto 0px 0px; width: 218px; border-right: 1px solid var(--line); padding: 35px 22px; background: var(--paper); z-index: 20; display: flex; flex-direction: column;}
.brand{display: block; margin: 0px 8px 34px;}
.seal{display: flex; align-items: center; justify-content: center; width: 54px; height: 58px; background: var(--red); color: var(--paper); font: 43px var(--serif); border: 3px double rgb(230, 182, 162); border-radius: 4px; transform: rotate(-2deg); margin-bottom: 16px;}
.brand strong{display: block; font: 700 27px var(--serif); letter-spacing: 2px;}
.brand small{display: block; color: var(--muted); font-size: 12px; letter-spacing: 1px; margin-top: 9px;}
.main-nav{display: grid; gap: 9px;}
.main-nav a{display: flex; align-items: center; gap: 16px; padding: 12px 15px; border-radius: 3px; color: rgb(76, 80, 72);}
.main-nav a.active{background: rgb(239, 230, 223); color: var(--red);}
.sidebar-foot{margin-top: auto; padding: 24px 8px 0px; color: var(--muted); font-size: 11px;}
.sidebar-foot p{font: 15px/1.9 var(--serif); border-top: 1px solid var(--line); padding-top: 20px; letter-spacing: 2px;}
.sidebar-foot a{display: block; margin-top: 12px; font-size: 10px;}
.local-dot{display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--green); vertical-align: middle;}
.shell{margin-left: 218px; padding: 0px 48px; max-width: 1710px;}
.topbar{display: flex; align-items: center; gap: 24px; height: 84px; font-size: 12px; color: var(--muted);}
.topbar > span:first-child{margin-right: auto;}
.top-motto{letter-spacing: 3px; white-space: nowrap;}
#search-form{display: flex; align-items: center; gap: 10px; border: 1px solid rgb(199, 201, 191); border-radius: 25px; padding: 6px 12px; width: 270px;}
#search-form .icon{width: 16px; height: 16px;}
#global-search{background: none; border: 0px; outline: none; width: 100%; font-size: 12px; color: var(--ink);}
#search-form:focus-within{outline: 2px solid var(--red); outline-offset: 2px;}
#search-form button{border: 0px; background: none; color: var(--muted); padding: 0px 2px; font-size: 17px;}
#main{min-height: calc(-170px + 100vh); outline: none;}
.eyebrow{font-size: 11px; letter-spacing: 2px; color: var(--red); margin: 0px 0px 18px;}
.button{display: inline-flex; justify-content: center; align-items: center; gap: 16px; background: var(--red); border: 1px solid var(--red); padding: 11px 22px; border-radius: 3px; color: rgb(255, 255, 255); font-size: 14px; line-height: 1.6; min-height: 44px;}
.button:hover{color: white;}
.page-footer{display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; padding: 22px 0px; margin-top: 35px;}
.dot-separator{margin: 0px 9px;}
.page-heading{padding: 28px 0px 25px;}
.page-heading h1{font: 600 clamp(30px,3.5vw,44px)/1.35 var(--serif); margin: 0px 0px 13px;}
.page-heading p{color: var(--muted); margin: 0px; max-width: 720px;}
.page-heading .eyebrow{margin-bottom: 12px;}
textarea,select{border: 1px solid rgb(196, 198, 186); background: rgb(252, 251, 246); color: var(--ink); border-radius: 3px; padding: 11px 13px; width: 100%; outline-offset: 2px;}
textarea{resize: vertical; min-height: 115px; line-height: 1.8;}
.muted{color: var(--muted);}
@media (min-width: 1600px) {
.shell{padding: 0px 65px;}
}
@media (max-width: 1200px) {
.sidebar{width: 185px; padding: 28px 15px;}
.shell{margin-left: 185px; padding: 0px 32px;}
.brand strong{font-size: 25px;}
.main-nav a{gap: 12px; padding: 12px;}
.top-motto{display: none;}
}
@media (max-width: 700px) {
.sidebar{position: static; width: 100%; padding: 19px 20px 0px; border-right: 0px; border-bottom: 1px solid var(--line);}
.brand{display: flex; align-items: center; gap: 12px; margin: 0px 0px 17px;}
.seal{width: 37px; height: 39px; font-size: 29px; margin: 0px;}
.brand strong{font-size: 22px; letter-spacing: 1px;}
.brand small{font-size: 10px; margin-top: 3px;}
.main-nav{display: flex; gap: 0px; justify-content: space-between;}
.main-nav a{flex-direction: column; font-size: 10px; gap: 5px; padding: 9px 6px; border-radius: 3px 3px 0px 0px; min-width: 51px;}
.main-nav .icon{width: 19px; height: 19px;}
.sidebar-foot{display: none;}
.shell{margin-left: 0px; padding: 0px 21px;}
.topbar{height: 64px; gap: 10px; font-size: 11px;}
#search-form{width: 205px; max-width: 65%; padding: 6px 10px;}
#global-search{font-size: 11px;}
.page-footer{font-size: 10px; flex-direction: column; gap: 8px; margin-top: 28px;}
.page-heading{padding-top: 18px;}
.page-heading h1{font-size: 32px;}
.page-heading p{font-size: 13px;}
.page-heading .eyebrow{font-size: 10px;}
.topbar > span:first-child{white-space: nowrap;}
}
@media (prefers-reduced-motion: reduce) {
html{scroll-behavior: auto;}
*{transition: none !important;}
}
@media (max-width: 700px) {
.main-nav a{min-width: 45px; padding: 9px 4px; font-size: 9px;}
}
/* 新首页只增加两个平级入口，沿用原色彩、字体和按钮。 */
.site-home,.site-search{max-width:900px;margin:0 auto}
.site-learning-paths{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin:24px 0 48px}
.site-learning-paths>section{border-top:1px solid var(--line);padding:28px 0}
.site-learning-paths h2{font:600 28px/1.6 var(--serif);margin:0 0 14px}
.site-learning-paths p{font-size:18px;line-height:1.9;margin:0 0 22px}
.site-learning-paths .site-path-note{font-size:15px;color:var(--muted);margin:22px 0 0}
.search-empty{border-top:1px solid var(--line);padding-top:24px;color:var(--muted)}
@media(max-width:700px){.site-learning-paths{grid-template-columns:1fr;gap:12px}.site-learning-paths>section{padding:22px 0}.site-learning-paths h2{font-size:25px}.site-learning-paths p{font-size:17px}}