:root{--ink:#172c31;--muted:#58666a;--paper:#f8f9f7;--line:#dce2df;--accent:#975130;--dark:#13262b}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:35px}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #ad6e43;outline-offset:5px}header,main,footer{max-width:1200px;margin:auto}header{padding:27px 32px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-weight:650;font-size:20px;letter-spacing:2px}.brand small{display:block;font-size:12px;font-weight:400;letter-spacing:2px;color:var(--muted)}.seal{display:grid;place-items:center;background:var(--accent);color:white;width:42px;height:46px;font-family:serif;font-size:27px;border-radius:3px}nav{display:flex;gap:30px;align-items:center;font-size:14px}nav a:hover,.text-link:hover{color:var(--accent)}.nav-buy{border:1px solid var(--ink);padding:8px 17px}.hero{padding:80px 60px 70px;display:grid;grid-template-columns:1.3fr 1fr;gap:80px;align-items:center}.eyebrow{font-size:13px;letter-spacing:3px;color:var(--accent);margin:0 0 18px;font-weight:650}h1,h2,.edition-name{font-family:"Songti SC",SimSun,"Noto Serif CJK SC",serif;font-weight:500}h1{font-size:clamp(40px,5vw,62px);line-height:1.45;letter-spacing:1px;margin:0 0 24px}h1 span{color:var(--accent)}.intro{max-width:450px;color:var(--muted);line-height:2}.actions{display:flex;gap:27px;align-items:center;margin-top:34px}.button{border:0;border-radius:3px;background:var(--dark);color:#fff;padding:15px 22px;display:inline-flex;align-items:center;justify-content:space-between;gap:25px;cursor:pointer;font-size:15px}.button:hover{background:#28464b}.small{font-size:13px;color:var(--muted)}.hero-note{margin-top:20px}.text-link{font-size:14px;border-bottom:1px solid var(--line)}.edition{background:var(--dark);color:#e2cfa5;padding:26px 32px 34px;box-shadow:15px 16px 0 #e9ede9;border-radius:2px;min-height:390px}.edition-top,.edition-bottom{display:flex;justify-content:space-between}.edition-top{font-size:12px;letter-spacing:2px;opacity:.85}.edition-name{padding:38px 0 25px}.edition-name span{font-size:79px;letter-spacing:16px;line-height:1.3}.edition-name small{display:block;font-size:19px;letter-spacing:7px;margin-top:10px}.edition-line{height:1px;background:#e2cfa544}.edition-bottom{padding-top:19px;font-size:14px;letter-spacing:3px}.edition-bottom p{margin:0}.vertical{writing-mode:vertical-rl;font-family:serif;font-size:16px}.strip{margin:0 32px;display:flex;justify-content:space-around;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;font-size:14px}.strip b{font-weight:400;color:var(--accent);padding-right:14px}.section{margin:0 60px;padding:65px 0;border-bottom:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:30px}h2{font-size:32px;line-height:1.6;margin:0}h3{font-size:18px;font-weight:600;margin:0 0 7px}.section-heading>p,.preview-copy>p,.steps p{color:var(--muted);font-size:14px}.chapters article{display:flex;gap:25px;align-items:center;border-top:1px solid var(--line);padding:23px 0}.num{font-family:serif;font-size:24px;color:var(--accent)}.chapters p{margin:0;color:var(--muted);font-size:14px}.tag{margin-left:auto;white-space:nowrap;background:#eaf0ec;padding:4px 10px;font-size:12px;color:#4c635a}.preview-section{display:grid;grid-template-columns:1.3fr 1fr;gap:50px;align-items:center}.preview-screen{padding:23px;background:#e8eeea;min-height:310px;display:flex;flex-direction:column;justify-content:space-between}.preview-kicker{font-size:13px;letter-spacing:3px}.preview-center{text-align:center;padding:24px 0}.play{display:grid;place-items:center;width:54px;height:54px;border:1px solid #84948b;border-radius:50%;font-size:26px;margin:0 auto 15px}.preview-center p{font-size:13px;color:var(--muted);margin:0}.preview-bottom{display:flex;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted)}.notice{border-left:2px solid #ad8d70;padding-left:15px;margin-top:23px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.steps article{border-top:1px solid #9faeaa;padding-top:20px}.steps article>span{color:var(--accent);font-size:13px;letter-spacing:2px}.steps h3{margin-top:20px}.purchase{margin:65px 60px 0;background:var(--dark);color:#f5f5ee;padding:42px 45px;display:grid;grid-template-columns:1fr 1fr;gap:50px}.purchase .eyebrow{color:#d8bd8b}.purchase p{font-size:14px;color:#c3cfca}.purchase-box{border-left:1px solid #ffffff30;padding-left:40px}.price span{display:block;font-size:28px}.price small{color:#c3cfca;font-size:13px}.purchase .button{background:#dfc89c;color:var(--dark);width:100%;margin-top:24px}.payments{display:flex;gap:22px;align-items:center;font-size:15px;border-top:1px solid #ffffff30;padding-top:18px}.payments small{font-size:12px;color:#c3cfca}.faq{display:grid;grid-template-columns:1fr 1.4fr;gap:50px}details{border-bottom:1px solid var(--line);padding:15px 0}summary{cursor:pointer;font-size:15px}details p{color:var(--muted);font-size:14px}footer{padding:30px 32px;display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:12px;color:var(--muted)}footer .brand{font-size:16px}dialog{width:min(520px,calc(100% - 30px));max-height:90vh;overflow:auto;border:1px solid var(--line);border-radius:6px;padding:35px;background:var(--paper);color:var(--ink)}dialog::backdrop{background:#102326aa;backdrop-filter:blur(4px)}dialog>p{font-size:14px;color:var(--muted)}dialog h2{font-size:27px}.close{position:absolute;right:15px;top:8px;background:none;border:0;font-size:28px;cursor:pointer;color:var(--muted)}form>label,legend{font-size:14px;font-weight:600}input[type=email]{width:100%;border:1px solid #acbab3;padding:12px;margin:8px 0 20px;border-radius:3px;background:white}fieldset{border:0;padding:0;margin:0 0 20px}.method{display:inline-flex;align-items:center;gap:7px;margin:10px 18px 0 0;font-size:15px}input[type=radio]{accent-color:var(--dark);width:18px;height:18px}.order-summary{display:flex;justify-content:space-between;gap:15px;padding:15px 0;border-top:1px solid var(--line);font-size:14px}form .button{width:100%}#checkout-status{font-size:14px;color:var(--accent)}.skip{position:absolute;left:10px;top:-100px;padding:10px;background:white}.skip:focus{top:10px}@media(max-width:800px){header{padding:20px}.brand{font-size:18px}nav{gap:15px}nav a:nth-child(3){display:none}.hero{padding:45px 25px;gap:30px}.edition{min-height:340px;padding:23px}.edition-name span{font-size:62px}.section{margin:0 25px;padding:45px 0}.strip{margin:0 20px;font-size:12px}.strip b{padding-right:6px}.section-heading{align-items:start}.purchase{margin:45px 25px 0;padding:30px;gap:30px}.purchase-box{padding-left:25px}.preview-section{gap:25px}.faq{gap:30px}footer{padding:25px;flex-wrap:wrap}}@media(max-width:600px){header{align-items:center}nav a{display:none}nav .nav-buy{display:block;font-size:13px;padding:7px 12px}.hero{grid-template-columns:1fr;padding:35px 25px 40px}.hero h1{font-size:42px}.edition{min-height:0;padding:22px 26px;box-shadow:8px 8px 0 #e9ede9}.edition-name{padding:22px 0}.edition-name span{font-size:58px}.edition-name small{display:inline-block;margin-left:8px;font-size:16px;letter-spacing:3px}.edition-bottom{padding-top:15px}.edition-bottom p{line-height:1.7}.vertical{writing-mode:horizontal-tb;letter-spacing:2px}.strip{flex-direction:column;gap:8px;padding:17px 5px;font-size:14px}.section-heading{display:block}.section-heading>p{margin-top:15px}h2{font-size:28px}.chapters article{gap:16px}.chapters h3{font-size:17px}.tag{font-size:12px;padding:3px 6px}.preview-section,.steps,.purchase,.faq{grid-template-columns:1fr}.preview-section{gap:30px}.preview-screen{min-height:290px}.steps{gap:22px}.steps h3{margin-top:12px}.steps p{margin-bottom:0}.purchase{padding:26px}.purchase-box{border-left:0;border-top:1px solid #ffffff30;padding:23px 0 0}.faq{gap:20px}footer p{display:none}.actions{gap:20px}.button{padding:14px 17px}dialog{padding:30px 22px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Topic storefront and article layouts */
.edition-name span{font-size:65px;letter-spacing:8px}.edition-name small{font-size:16px;letter-spacing:2px}.article-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.article-card{display:block;padding:30px;background:#eef1ed;border:1px solid #dce2da;transition:background .2s}.article-card:hover{background:#e5ebe5}.article-top{display:flex;justify-content:space-between;font-size:13px;color:var(--accent);letter-spacing:1px}.article-card h3{font-family:SimSun,serif;font-weight:500;font-size:26px;line-height:1.65;margin:22px 0 13px}.article-card p{font-size:15px;color:var(--muted)}.read-link{display:inline-block;margin-top:18px;font-size:14px;border-bottom:1px solid #9aaa9f}.package-layout{display:grid;grid-template-columns:1fr 1.4fr;gap:50px}.package-title{padding:30px;border-left:3px solid var(--accent);background:#f0eeea}.package-title h3{font-family:SimSun,serif;font-size:30px;font-weight:500;line-height:1.6;margin-top:20px}.package-title p{font-size:15px;color:var(--muted)}.package-title .tag{background:#e6dfd4;color:#765335}.package-layout .chapters article:first-child{border-top:0}.article-page{max-width:800px;padding:45px 28px 70px}.article-page>.eyebrow{margin-top:40px}.article-page h1{font-size:42px;line-height:1.6}.article-meta{font-size:14px;color:var(--muted);padding-bottom:25px;border-bottom:1px solid var(--line)}.article-body{font-size:17px;line-height:2}.article-body h2{font-size:27px;margin-top:35px}.article-lead{font-size:19px;color:#445c5c}.article-body ul{padding-left:24px}.article-end{margin-top:45px;padding:28px;background:#e9eeea}.article-end p{font-size:15px;color:var(--muted)}@media(max-width:600px){.article-grid,.package-layout{grid-template-columns:1fr;gap:20px}.article-card{padding:25px}.package-title{padding:25px}.edition-name span{font-size:52px}.edition-name small{display:block;margin-left:0}.article-page h1{font-size:32px}.article-page{padding-top:30px}.article-body{font-size:17px}nav .nav-buy{display:block}.article-card h3{font-size:25px}}@media(prefers-reduced-motion:reduce){.article-card{transition:none}}