@charset "UTF-8";
:root{--ink:#1d302f;--muted:#61706a;--paper:#f5f3ee;--white:#fffefb;--navy:#091722;--navy2:#122532;--gold:#d8c59d;--gold-dark:#816c42;--line:#dcded5;--serif:"Songti SC","Noto Serif CJK SC","STSong",serif;--sans:"PingFang SC","Microsoft YaHei",sans-serif;--radius:12px;--ease:180ms ease}
*{box-sizing:border-box}html{scroll-padding-top:110px}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.75 var(--sans);-webkit-font-smoothing:antialiased}body.home{color:#e9eee9;background:var(--navy)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}img{display:block;max-width:100%;height:auto}h1,h2,h3,p,figure{margin:0}h1,h2,h3{text-wrap:balance}p{text-wrap:pretty}h1,h2{font-family:var(--serif);font-weight:600;line-height:1.3}h3{font-size:20px;line-height:1.5;font-weight:600}a,button{transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease)}:focus-visible{outline:3px solid #a68c55;outline-offset:5px}button:disabled{opacity:.55;cursor:default}.wrap{width:min(1200px,calc(100% - 80px));margin-inline:auto}.skip{position:fixed;top:-100px;left:16px;z-index:99;background:var(--gold);color:var(--navy);padding:10px 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h3{font-family:var(--serif);font-size:28px;margin-bottom:8px}.world-banner p{color:#becbd1;font-size:14px}.world-banner a{margin-left:auto;z-index:1}.footer{border-top:1px solid var(--line);padding:45px 0 78px}.footer .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px}.footer strong{font:22px var(--serif)}.footer p{font-size:12px;color:var(--muted);margin-top:9px}.footer a{font-size:14px}.home .footer{border-color:#34434c}.home .footer p{color:#aab9bf}.reviewbar{position:fixed;bottom:12px;left:50%;transform:translateX(-50%);z-index:20;padding:6px 8px 6px 15px;display:flex;align-items:center;gap:7px;border:1px solid #45515a;border-radius:9px;background:#091722f2;backdrop-filter:blur(10px);box-shadow:0 4px 16px #0002;color:#dce5e8;font-size:11px;white-space:nowrap}.reviewbar span{color:#b4c2c9;padding-right:8px}.reviewbar a{padding:6px 12px;border-radius:5px}.reviewbar a.active{background:var(--gold);color:var(--navy)}.reviewbar 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img{width:100%;aspect-ratio:16/9;object-fit:contain;background:#355244;border-radius:3px;margin-bottom:5px}.preview-tabs button[aria-pressed=true]{border:2px solid var(--ink);padding:4px;color:var(--ink)}.detail-nav{display:flex;gap:28px;border-block:1px solid var(--line);padding:18px 0;font-size:13px;flex-wrap:wrap}.detail-nav a:hover{color:var(--gold-dark)}.detail-section{padding:34px 0;border-bottom:1px solid var(--line)}.detail-section h2{font-size:28px;margin-bottom:20px}.detail-section>p{font-size:15px;line-height:1.95}.detail-section .question{font:24px/1.65 var(--serif);margin:24px 0;padding:22px 26px;background:#e9eee5;border-radius:6px}.goal-list{list-style:none;padding:0;margin:0;display:grid;gap:20px}.goal-list li{display:grid;grid-template-columns:28px 1fr;gap:16px;font-size:15px}.goal-list b{font:21px var(--serif);color:var(--gold-dark)}.goal-list strong{display:block;font-weight:500;margin-bottom:5px}.goal-list p{color:var(--muted);font-size:13px}.timeline{width:100%;border-collapse:collapse;font-size:13px;text-align:left}.timeline td,.timeline th{padding:14px 12px 14px 0;border-bottom:1px solid var(--line);vertical-align:top}.timeline th{font-size:11px;color:var(--muted);font-weight:500}.timeline td:first-child{color:var(--gold-dark);white-space:nowrap}.timeline td:last-child{color:var(--muted);white-space:nowrap}.timeline tr:last-child td{border-bottom:0}.homework-card{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:22px;margin-top:16px}.homework-card h3{font-size:16px;margin-bottom:10px}.homework-card h3 span{display:inline-block;font-size:10px;padding:2px 8px;border-radius:20px;background:#e9eee5;color:#4b6358;margin-left:8px;vertical-align:middle}.homework-card p{font-size:14px;color:var(--muted)}details{margin-top:20px;padding-top:14px;border-top:1px solid var(--line)}summary{cursor:pointer;font-size:13px;color:var(--gold-dark);padding:4px 0}details .answer{font:17px/1.95 var(--serif);color:var(--ink);margin-top:15px}details .answer-note{font-size:11px;margin-top:12px}.resource-panel{align-self:start;background:var(--white);border:1px solid var(--line);padding:26px;border-radius:12px;position:sticky;top:24px}.resource-panel h2{font:24px var(--serif);margin-bottom:20px}.resource-panel .btn{width:100%;gap:12px}.resource-panel .help{font-size:11px;line-height:1.8;color:var(--muted);margin:12px 0 22px}.course-facts{display:grid;grid-template-columns:1fr 1fr;border-block:1px solid var(--line);margin:22px 0;padding:18px 0;gap:14px}.course-facts strong{display:block;font:25px var(--serif)}.course-facts span{font-size:11px;color:var(--muted)}.resource-links{display:grid}.resource-links a{padding:14px 0;border-bottom:1px solid var(--line);font-size:13px;display:flex;align-items:center;gap:12px}.resource-links a:hover{color:var(--gold-dark)}.resource-links .file{font-size:9px;letter-spacing:.2px;min-width:33px;background:#eff0e9;padding:4px;text-align:center;color:#53665a;border-radius:3px}.resource-links .file.ppt{background:#f4e8df;color:#985a39}.resource-links .arrow{font-size:16px;margin-left:auto}.resource-links a:last-child{border:0}.teacher-block{padding:20px 0 0;border-top:1px solid var(--line);margin-top:14px}.teacher-block small{font-size:11px;color:var(--muted)}.teacher-block p{font:18px/1.8 "Kaiti SC","STKaiti",var(--serif);margin-top:5px}.source-note{font-size:11px!important;color:var(--muted);margin-top:18px}.light-contact{display:flex;justify-content:space-between;align-items:center;padding:26px 30px;background:#e8ede4;border-radius:8px;margin-top:30px}.light-contact h3{font:22px var(--serif)}.light-contact p{font-size:12px;color:var(--muted);margin-top:7px}
@media(min-width:1600px){.hero{padding-block:80px}.hero-photo{height:500px}}
@media(max-width:1050px){.wrap{width:calc(100% - 48px)}.nav{gap:18px}.nav .optional{display:none}.hero{gap:35px}.hero h1{font-size:43px}.hero-photo{height:420px}.photo-label{padding:20px;width:85%}.hero-art{padding-left:0}.photo-side{right:-18px}.catalog-layout{grid-template-columns:190px 1fr;gap:25px}.detail-layout{grid-template-columns:minmax(0,1fr) 285px;gap:24px}.detail-head h1{font-size:46px}.workflow{gap:45px}.feature-card h3{font-size:22px}}
@media(max-width:760px){.wrap{width:calc(100% - 36px)}.topbar{height:76px}.topbar .wrap{gap:14px}.brand strong{font-size:20px}.brand small{font-size:9px}.brand img{width:25px;height:25px}.nav{gap:17px;font-size:12px}.nav .optional,.nav .nav-search,.nav .mobile-hide{display:none}.hero{grid-template-columns:1fr;gap:36px;padding:40px 0 35px}.hero h1{font-size:43px;line-height:1.4}.hero .lead{font-size:15px;margin:20px 0 25px}.hero .byline{margin-top:26px}.hero-art{max-width:600px;padding-bottom:32px}.hero-photo{height:330px;object-position:30% 44%;border-radius:2px 28px 2px 2px}.photo-label{width:76%;padding:18px 20px}.photo-label .number{font-size:32px}.photo-label strong{font-size:16px}.photo-side{right:6px;top:15px;color:#eee}.entry-strip{grid-template-columns:1fr;padding:0}.entry-strip a,.entry-strip a:first-child{padding:20px 0;border-right:0;border-bottom:1px solid #34434c}.entry-strip a:last-child{border:0}.entry-strip strong{font-size:16px}.entry-strip b{font-size:21px}.section{padding:48px 0}.featured{margin-top:40px}.section-head{align-items:start;gap:20px}.section-head h2{font-size:28px}.section-head .text-link{white-space:nowrap;font-size:12px;margin-top:30px;gap:8px}.feature-grid{grid-template-columns:1fr;gap:32px}.feature-card h3{font-size:25px}.feature-card .tagline{margin-top:15px}.feature-card .card-foot{margin-top:14px}.workflow,.practice-grid{grid-template-columns:1fr;gap:28px}.workflow h2,.practice-grid h2{font-size:31px}.workflow p{margin-top:16px;max-width:none}.task-list a{padding:20px 0}.practice-grid img{aspect-ratio:1.6}.reading-row{grid-template-columns:1fr;gap:28px}.reading-item{padding-top:18px}.reading-item h3{margin:10px 0;font-size:24px}.world-banner{padding:25px;display:block;margin-top:30px;min-height:230px}.world-banner h3{font-size:25px}.world-banner a{margin-top:24px}.footer{padding:32px 0 85px}.footer .wrap{display:block}.footer a{display:inline-block;margin-top:20px}.reviewbar{bottom:8px;max-width:calc(100% - 16px);gap:2px;padding:5px 6px;font-size:10px}.reviewbar span{padding:0 4px}.reviewbar a{padding:6px 9px}.page-intro{padding:32px 0 25px}.page-intro h1{font-size:34px}.page-intro .sub{font-size:14px}.breadcrumb{margin-bottom:20px;gap:8px;font-size:11px}.catalog-layout{grid-template-columns:1fr;gap:23px}.catalog-sidebar{padding-top:0;border:0}.catalog-sidebar h2,.sidebar-note{display:none}.category-list{display:flex;flex-direction:row;flex-wrap:wrap;gap:8px}.category-list button{padding:9px 12px;border:1px solid var(--line);font-size:12px}.category-list small{font-size:10px;padding-top:0}.searchbox{padding:0 12px}.searchbox input{font-size:13px;height:49px}.search-form .btn{padding:10px 17px;font-size:12px}.filter-row{gap:10px}.filter-row select{font-size:12px;max-width:137px}.filter-row label{font-size:11px;gap:5px}.reset{margin-left:0;padding-left:0}.result-head{padding-top:20px;font-size:12px}.catalog-grid{gap:16px;margin-top:18px;grid-template-columns:1fr}.course-card .course-content{padding:20px}.course-card h3{font-size:24px}.course-card .card-action{margin-top:18px}.detail-head{grid-template-columns:1fr;gap:16px}.detail-head h1{font-size:43px;gap:15px}.detail-head h1 small{font-size:12px}.detail-head>.text-link{display:none}.detail-layout{display:flex;flex-direction:column;gap:26px}.detail-layout .resource-panel{position:static;order:2;width:100%}.preview-frame{padding:7px}.preview-tabs{gap:8px;margin-bottom:24px}.preview-tabs button{font-size:10px}.detail-nav{gap:24px;font-size:12px;padding:15px 0}.detail-section{padding:28px 0}.detail-section h2{font-size:25px}.detail-section>p{font-size:14px}.detail-section .question{font-size:21px;padding:18px 20px}.timeline{font-size:12px}.timeline td,.timeline th{padding-right:10px}.timeline td:first-child{white-space:normal;min-width:72px}.timeline td:last-child{white-space:normal;min-width:48px}.homework-card{padding:18px}.resource-panel{padding:23px}.light-contact{padding:22px;display:block}.light-contact a{margin-top:16px}.eyebrow{font-size:10px;letter-spacing:2px}.detail-meta{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}