:root{color-scheme:light;--ink:#17233b;--muted:#5f6e84;--blue:#2563eb;--line:#e5eaf2;--background:#f6f8fc}
*{box-sizing:border-box}html{min-width:320px;scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--background);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #93c5fd;outline-offset:4px}button{font:inherit}img{max-width:100%}[hidden]{display:none!important}
.page-header,.page-shell,.page-footer{width:min(1160px,calc(100% - 48px));margin:0 auto}.page-header{padding:22px 0;display:flex;align-items:center;gap:28px}.brand{display:block;flex-shrink:0}.brand img{display:block;width:150px;height:50px;object-fit:contain}.page-header nav{display:flex;gap:10px;font-size:13px;color:var(--muted)}.header-search{margin-left:auto;font-size:13px}.page-shell{padding:15px 0 60px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:24px;align-items:start}article{min-width:0;background:white;border:1px solid var(--line);border-radius:20px;overflow:hidden}.topic-hero{padding:36px 34px 26px;background:linear-gradient(145deg,#eff6ff,#fff 58%)}.eyebrow,.panel-eyebrow{margin:0 0 12px;color:#3262a4;font-size:12px;font-weight:700;letter-spacing:.04em}h1{font-size:38px;line-height:1.32;letter-spacing:-.03em;margin:0 0 20px}h1 span{display:block;font-size:clamp(21px,2.2vw,28px);font-weight:600;letter-spacing:-.015em;margin-top:7px;color:#475b78}.hero-lead{font-size:16px;color:#4b5b72;margin:0}.hero-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:12px;color:var(--muted);margin:18px 0 22px}.year-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.year-card{display:flex;flex-direction:column;padding:18px 15px;border:1px solid #dce7f7;border-radius:12px;background:rgba(255,255,255,.85)}.year-card:hover{text-decoration:none;border-color:#9bbcf1}.year-card strong{font-size:23px;line-height:1.35;letter-spacing:-.04em;color:#214c8d}.year-card span{color:#35465e;font-size:14px;font-weight:600;margin:7px 0}.year-card small{font-size:11px;color:var(--muted);line-height:1.6}.section-nav{display:flex;flex-wrap:wrap;gap:8px 24px;padding:15px 34px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}.topic-section{padding:30px 34px;border-bottom:1px solid var(--line);scroll-margin-top:24px}.topic-section:last-child{border-bottom:0}h2{margin:0 0 14px;font-size:21px;line-height:1.5;letter-spacing:-.02em}.topic-section>p{margin:0 0 18px;color:#53637a;font-size:14px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.text-button{border:0;padding:4px 0;background:transparent;color:var(--blue);font-size:12px;cursor:pointer;white-space:nowrap}.comparison-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13px;line-height:1.75}th,td{padding:13px 12px;vertical-align:top;text-align:left;border-bottom:1px solid var(--line)}th{background:#f5f8fd;color:#465c7a;font-weight:600}td{color:#526177}th:first-child,td:first-child{width:27%}.directory-group{border:1px solid var(--line);border-radius:11px;margin:12px 0;background:white;scroll-margin-top:24px}summary{cursor:pointer;list-style:none}summary::-webkit-details-marker{display:none}.directory-group summary{padding:15px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:15px;font-weight:650}.level-label{display:inline-block;margin-right:10px;padding:2px 6px;background:#eff5ff;color:#37629c;font-size:10px;border-radius:4px;vertical-align:middle}.expand-label{font-size:11px;color:var(--muted);white-space:nowrap;font-weight:400}.expand-label:after{content:' ＋';font-size:14px}.directory-group[open] .expand-label{font-size:0}.directory-group[open] .expand-label:after{content:'收起目录 −';font-size:11px}.directory-content{padding:0 16px 14px}.directory-content>p{font-size:13px;color:#58687d;line-height:1.8;margin:0 0 13px}.directory-content .folder-path{color:#738199;font-size:11px;overflow-wrap:anywhere;padding-bottom:12px;border-bottom:1px solid #edf0f5}.file-list{list-style:none;padding:0;margin:0}.file-list li{display:flex;align-items:baseline;gap:10px;border-bottom:1px solid #f0f3f7;padding:9px 0;font-size:12px}.file-list li:last-child{border-bottom:0}.file-type{flex-shrink:0;display:inline-block;min-width:32px;text-align:center;font-size:9px;padding:1px 4px;color:#65778f;background:#f1f4f8;border-radius:4px}.type-pdf{background:#fff1ed;color:#b9543c}.type-mp3{background:#edf9f3;color:#307c59}.type-zip{background:#fff8e7;color:#98772f}.file-name{flex:1;min-width:0;overflow-wrap:anywhere}.file-size{flex-shrink:0;color:var(--muted);font-size:11px}.practice-steps{list-style:none;padding:0;margin:20px 0 0;counter-reset:practice}.practice-steps li{counter-increment:practice;position:relative;padding:0 0 18px 43px}.practice-steps li:before{content:counter(practice);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:8px;text-align:center;background:#eef4ff;color:#3260a1;font-size:13px;font-weight:700;line-height:28px}.practice-steps strong{font-size:14px}.practice-steps p{font-size:13px;color:#5e6e83;margin:6px 0 0}.practice-steps li:last-child{padding-bottom:0}.question{border-bottom:1px solid #edf0f5;padding:14px 0}.question:last-child{border-bottom:0}.question summary{font-size:14px;font-weight:600;display:flex;align-items:baseline;justify-content:space-between;gap:12px}.question summary:after{content:'＋';color:#7a8aa0;font-weight:400}.question[open] summary:after{content:'−'}.question p{font-size:13px;color:#5d6d82;margin:12px 0 0}.share-panel{position:sticky;top:24px;background:white;border:1px solid var(--line);border-radius:18px;padding:24px}.share-panel h2{font-size:20px;margin:0 0 10px}.panel-summary{color:var(--muted);font-size:13px;margin:0 0 18px}.share-panel dl{margin:0 0 22px}.share-panel dt{color:#8390a4;font-size:11px;margin-top:13px}.share-panel dd{font-size:13px;margin:2px 0 0}.button{display:block;text-align:center;border-radius:9px;padding:11px 15px;font-size:14px;font-weight:650;background:var(--blue);color:white;line-height:1.65}.button:hover{text-decoration:none;background:#1d4ed8}.secondary-link{display:block;text-align:center;font-size:12px;margin-top:12px}.panel-toc{border-top:1px solid var(--line);margin-top:25px;padding-top:18px;display:grid;gap:8px;font-size:12px}.panel-toc span{color:#7c899c;font-size:11px}.panel-toc a{color:#4c668a}.mobile-open{display:none}.page-footer{display:flex;gap:12px;font-size:12px;color:#8a96a7;padding:0 0 30px}
@media(max-width:900px){.page-layout{grid-template-columns:minmax(0,1fr) 255px;gap:18px}.topic-hero,.topic-section{padding-left:25px;padding-right:25px}.share-panel{padding:20px}.year-overview{gap:7px}.year-card{padding:14px 10px}.year-card strong{font-size:20px}h1{font-size:33px}.section-nav{padding-left:25px;padding-right:25px}}
@media(max-width:720px){.page-header,.page-shell,.page-footer{width:calc(100% - 28px)}.page-header{padding:16px 0;gap:14px}.brand img{width:120px;height:40px}.page-header nav{display:none}.header-search{font-size:12px}.page-shell{padding-top:8px}.page-layout{display:block}article{border-radius:15px}.topic-hero,.topic-section{padding:24px 20px}.topic-hero{padding-bottom:22px}h1{font-size:31px}h1 span{font-size:22px;line-height:1.5}.hero-lead{font-size:14px}.hero-meta{font-size:11px;margin:17px 0}.mobile-open{display:block;margin:0 0 21px}.year-overview{grid-template-columns:1fr}.year-card{padding:12px 14px;display:grid;grid-template-columns:105px 1fr;gap:0 12px}.year-card strong{grid-row:1/3;align-self:center;font-size:21px}.year-card span{margin:0;font-size:13px}.year-card small{font-size:10px}.section-nav{padding:12px 20px;gap:7px 18px;font-size:12px}.topic-section h2{font-size:19px}.topic-section>p{font-size:13px}th,td{padding:11px 9px;font-size:12px}table{min-width:470px}.directory-group summary{padding:14px 12px;font-size:13px}.level-label{margin-right:7px}.expand-label{font-size:10px}.directory-content{padding:0 12px 13px}.file-list li{flex-wrap:wrap;gap:2px 7px}.file-name{flex-basis:calc(100% - 45px)}.file-size{margin-left:39px}.share-panel{position:static;margin-top:18px;padding:23px}.panel-toc{display:none}.page-footer{padding-top:0}}
.resource-overview{margin:0 0 22px;overflow:hidden;border:1px solid #dfe7f3;border-radius:12px;background:#f3f6fb}.resource-overview a{display:block;cursor:zoom-in}.resource-overview img{display:block;width:100%;height:auto;max-width:100%}
@media(max-width:720px){.resource-overview{margin:0 -8px 18px;border-radius:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:720px){.comparison-wrap{overflow:visible}.comparison-wrap table{min-width:0}.comparison-wrap thead{display:none}.comparison-wrap tbody,.comparison-wrap tr,.comparison-wrap td{display:block}.comparison-wrap tr{padding:13px 0;border-bottom:1px solid var(--line)}.comparison-wrap td{border:0;padding:4px 0;width:auto}.comparison-wrap td:first-child{width:auto;font-weight:650;color:var(--ink);font-size:13px}.comparison-wrap td:nth-child(2):before{content:'先看：';color:var(--muted)}.comparison-wrap td:nth-child(3):before{content:'留意：';color:var(--muted)}}