.cn-knowledge-entry{margin-top:18px;border-color:#d8c3ea;background:linear-gradient(135deg,#fffdf6,#f6effd)}
.cn-knowledge-entry .cn-pill{background:#eee2f8;color:#755096}.cn-knowledge-cover{overflow:hidden;border-radius:20px;background:#f5ecfb}
.cn-knowledge-cover img{width:100%;height:100%;object-fit:cover;object-position:top}
.cn-knowledge-page{background:linear-gradient(#f6e7b5,#fffaf0 42%,#f5edff)}.cn-knowledge-hero{background:#f2dea4}
.cn-knowledge-body{position:relative;z-index:3;margin-top:-5px;padding:22px 22px 60px;background:#fffdf8;border-radius:32px 32px 0 0;min-height:650px}.cn-knowledge-title{margin:2px 4px 22px}.cn-knowledge-title span{color:#806b60;font-weight:800}.cn-knowledge-title h1{margin:5px 0 4px;font-size:30px}.cn-knowledge-title p{margin:0;color:#907c70}
.cn-knowledge-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.cn-knowledge-unit{position:relative;min-height:112px;border:1.5px solid #ead398;border-radius:23px;background:linear-gradient(145deg,#fff8df,#fff);padding:20px 38px 18px 18px;text-align:left;color:#573725;box-shadow:0 9px 22px rgba(95,66,34,.09)}.cn-knowledge-unit:nth-child(3n+2){background:linear-gradient(145deg,#ecf8ee,#fff);border-color:#bcdcc3}.cn-knowledge-unit:nth-child(3n){background:linear-gradient(145deg,#eef5ff,#fff);border-color:#bed7ee}.cn-knowledge-unit b{display:block;font-size:21px}.cn-knowledge-unit span{display:block;margin-top:9px;color:#8a7467}.cn-knowledge-unit i{position:absolute;right:15px;top:50%;transform:translateY(-50%);font-size:30px;font-style:normal;color:#d69a31}
.cn-knowledge-lessons{display:grid;gap:13px}.cn-knowledge-lesson{width:100%;display:grid;grid-template-columns:82px 1fr 28px;align-items:center;gap:14px;border:1px solid #e8ddc9;border-radius:21px;background:#fff;padding:10px;text-align:left;color:#4c3024;box-shadow:0 8px 20px rgba(76,48,36,.08)}.cn-knowledge-lesson>img{width:82px;height:72px;object-fit:cover;object-position:top;border-radius:14px;border:1px solid #e6dccd}.cn-knowledge-lesson b{display:block;font-size:19px;line-height:1.35}.cn-knowledge-lesson span{display:block;margin-top:7px;color:#8e786d}.cn-knowledge-lesson i{font-size:29px;font-style:normal;color:#d29739}
.pdf-course.chinese-pdf{background:linear-gradient(180deg,#fff4d2,#fffaf0 240px,#f4f9ed)}
@media(min-width:700px){.cn-knowledge-body{padding-left:48px;padding-right:48px}.cn-knowledge-lessons{grid-template-columns:1fr 1fr}.cn-knowledge-unit{min-height:126px}}
@media(max-width:430px){.cn-knowledge-body{padding-left:14px;padding-right:14px}.cn-knowledge-grid{gap:10px}.cn-knowledge-unit{min-height:104px;padding:16px 30px 14px 14px}.cn-knowledge-unit b{font-size:18px}.cn-knowledge-lesson{grid-template-columns:70px 1fr 24px;gap:10px}.cn-knowledge-lesson>img{width:70px;height:64px}.cn-knowledge-lesson b{font-size:17px}}

/* V5.53：语文单元目录在横屏使用用户提供的完整 4:3 页面。 */
.cn-knowledge-units-landscape{display:none;position:relative;width:100vw;height:var(--app-h);aspect-ratio:auto;margin:0;overflow:hidden}
.cn-knowledge-units-landscape>img{display:block;width:100%;height:100%;object-fit:cover}
.cn-knowledge-landscape-hit{position:absolute;z-index:5;border:0;background:transparent;cursor:pointer}
.cn-knowledge-landscape-hit.back{left:1.3%;top:1.2%;width:8%;height:11%}.cn-knowledge-landscape-hit.home-nav{left:auto;right:1.3%;top:1.2%;width:8%;height:11%;min-height:0}
.cn-knowledge-landscape-hit.unit{top:62.4%;width:21.5%;height:15.6%}.cn-knowledge-landscape-hit.unit.u1{left:5.4%}.cn-knowledge-landscape-hit.unit.u2{left:28.2%}.cn-knowledge-landscape-hit.unit.u3{left:50.5%}.cn-knowledge-landscape-hit.unit.u4{left:73.1%}.cn-knowledge-landscape-hit.unit.u5{left:5.4%;top:79.2%}.cn-knowledge-landscape-hit.unit.u6{left:28.2%;top:79.2%}.cn-knowledge-landscape-hit.unit.u7{left:50.5%;top:79.2%}.cn-knowledge-landscape-hit.unit.u8{left:73.1%;top:79.2%}
html.device-landscape .cn-knowledge-units-portrait{display:none}html.device-landscape .cn-knowledge-units-landscape{display:block}html.device-portrait .cn-knowledge-units-landscape{display:none}

/* V5.55.2：仅横屏使用新课时页背景；竖屏继续沿用原页面和原排版。 */
.cn-knowledge-lessons-landscape{display:none;position:relative;width:100vw;height:var(--app-h);aspect-ratio:auto;margin:0;overflow:hidden;background:#fff4c6}
.cn-knowledge-lessons-landscape>img{display:block;width:100%;height:100%;object-fit:cover}
html.device-landscape .cn-knowledge-lessons-portrait{display:none}
html.device-landscape .cn-knowledge-lessons-landscape{display:block}
html.device-portrait .cn-knowledge-lessons-landscape{display:none}
.cn-knowledge-lessons-landscape .cn-knowledge-landscape-hit.back{left:1.6%;top:1.8%;width:8%;height:11%}
.cn-knowledge-lessons-landscape .cn-knowledge-landscape-hit.home-nav{right:1.6%;top:1.8%;width:8%;height:11%}
.cn-knowledge-landscape-lessons{position:absolute;z-index:3;left:5.5%;right:5.5%;top:51.5%;bottom:3.2%;display:grid;grid-template-rows:auto minmax(0,1fr);gap:1.2%;padding:0}
.cn-knowledge-landscape-heading{display:flex;align-items:baseline;gap:12px;color:#795342}.cn-knowledge-landscape-heading span{font-size:clamp(12px,1.2vw,17px);font-weight:800}.cn-knowledge-landscape-heading b{font-size:clamp(22px,2.2vw,31px);color:#583124}.cn-knowledge-landscape-heading small{font-size:clamp(12px,1.1vw,16px);font-weight:800;color:#9a796a}
.cn-knowledge-lessons-landscape .cn-knowledge-lessons{min-height:0;display:grid;grid-template-columns:minmax(0,1fr);grid-auto-rows:minmax(44px,1fr);gap:5px;overflow:auto}
.cn-knowledge-lessons-landscape .cn-knowledge-lesson{min-height:0;height:100%;grid-template-columns:88px 1fr 30px;gap:12px;padding:4px 11px;border:2px solid #f0d47b;border-radius:16px;background:rgba(255,255,255,.94);box-shadow:0 5px 13px rgba(113,79,28,.1)}
.cn-knowledge-lessons-landscape .cn-knowledge-lesson:last-child:nth-child(odd){grid-column:auto;width:100%;justify-self:stretch}
.cn-knowledge-lessons-landscape .cn-knowledge-lesson>img{width:88px;height:46px;object-fit:contain;object-position:center;border-radius:10px;background:#fff}
.cn-knowledge-lessons-landscape .cn-knowledge-lesson b{font-size:clamp(15px,1.55vw,22px)}
.cn-knowledge-lessons-landscape .cn-knowledge-lesson span{margin-top:4px;font-size:clamp(11px,1.05vw,15px)}

@media(max-height:650px) and (min-width:700px){
  .cn-knowledge-landscape-lessons{top:50.5%;bottom:2%;gap:.7%}
  .cn-knowledge-lessons-landscape .cn-knowledge-lessons{gap:7px 12px}
  .cn-knowledge-lessons-landscape .cn-knowledge-lesson{grid-template-columns:88px 1fr 24px;padding:5px 10px}
  .cn-knowledge-lessons-landscape .cn-knowledge-lesson>img{width:88px;height:50px}
}