:root{--paper:#f8f5ef;--white:#fffdf9;--navy:#17243c;--ink:#252a35;--muted:#59606c;--red:#a83d34;--line:#d9d4ce;--soft:#ede7e4;--nav-offset:105px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth}
*{box-sizing:border-box}body{margin:0;font-size:1rem;line-height:1.8}h1,h2,h3,p,dl,dd{margin:0}h1,h2,h3{color:var(--navy);line-height:1.35}h2{font-size:clamp(1.65rem,2.6vw,2.75rem);font-weight:700;letter-spacing:-.035em}h3{font-size:1.35rem;font-weight:700;overflow-wrap:anywhere}p{overflow-wrap:anywhere}a{color:inherit;text-decoration:none;touch-action:manipulation}a:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:5px}img{display:block;max-width:100%;height:auto}section[id],article[id]{scroll-margin-top:var(--nav-offset)}.wrap{width:min(1360px,calc(100% - 112px));margin-inline:auto}.section-space{padding-block:80px}.skip-link{position:fixed;top:12px;left:12px;z-index:100;padding:10px 20px;background:var(--navy);color:white;transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:30;background:var(--white);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:84px}.brand{font-size:1.5rem;font-weight:750;color:var(--navy);white-space:nowrap;letter-spacing:-.04em}.menu{min-width:0}.menu summary{display:none}.main-nav{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.main-nav a{display:flex;align-items:center;justify-content:center;min-height:46px;padding:8px 14px;font-size:.94rem;white-space:nowrap;border-radius:5px;transition:background .16s,color .16s}.main-nav a:hover{background:var(--soft)}.main-nav a[aria-current]{background:#f1e4df;color:#96372f;font-weight:650}
.hero{text-align:center;border-bottom:1px solid var(--line)}.hero-inner{padding-block:64px 70px;max-width:1150px}.hero-kicker{color:var(--red);font-size:.9rem;letter-spacing:.12em;font-weight:650;margin-bottom:22px}.hero-brand{display:block;font-size:clamp(3.125rem,7.8vw,7.75rem);font-weight:750;letter-spacing:-.055em;line-height:1.17;white-space:nowrap}.hero-subtitle{display:block;font-size:1.125rem;font-weight:500;letter-spacing:.08em;margin-top:15px}.hero-subtitle>span{color:var(--red);margin-right:10px}.hero-tagline{font-size:1.625rem;font-weight:650;color:var(--navy);margin-top:28px}.hero-intro{max-width:700px;margin:18px auto 0;color:var(--muted);line-height:1.95}.hero-links{display:flex;justify-content:center;gap:32px;margin-top:27px}.hero-links a{min-height:44px;display:flex;align-items:center;font-weight:650;border-bottom:1px solid var(--red);color:var(--red);transition:background .16s}.hero-links a:hover{background:#f1e4df}
.discovery-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:80px;padding-bottom:34px}.section-top{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-bottom:24px}.section-top h2{font-size:1.65rem}.section-top>p{font-size:.9rem;color:var(--muted)}.update-list{border-top:2px solid var(--navy)}.update-list article{display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}.update-list time{color:var(--muted);font-size:.8rem;line-height:1.3;letter-spacing:.07em}.update-list time span{display:block;color:var(--navy);font-size:1.65rem;font-weight:650;letter-spacing:0}.update-list h3{font-size:1.08rem}.update-list p{color:var(--muted);font-size:.86rem;margin-top:5px;line-height:1.65}.dot{margin-inline:7px}.update-state{color:var(--red);font-size:.8rem}.list-note{margin-top:18px;font-size:.85rem;color:var(--muted)}.origin-index nav{border-top:2px solid var(--navy)}.origin-index nav a{display:flex;justify-content:space-between;align-items:center;min-height:84px;gap:24px;border-bottom:1px solid var(--line);font-size:1.35rem;font-weight:650;padding:15px 0;transition:background .16s}.origin-index nav a:hover{background:var(--soft)}.origin-index small{display:inline-block;font-weight:400;color:var(--muted);font-size:.86rem;margin-left:16px}.index-line{width:28px;height:1px;background:var(--red);flex-shrink:0}.origin-index>p{color:var(--muted);font-size:.9rem;margin-top:22px;line-height:1.85}
.region-section{padding-block:48px 60px;border-bottom:1px solid var(--line)}.region-section:last-child{border:0;padding-bottom:80px}.region-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}.region-heading h2{font-size:2.4rem;margin-top:4px}.eyebrow{font-size:.8rem;font-weight:650;letter-spacing:.11em;color:var(--red);line-height:1.5}.region-heading>p{color:var(--muted);font-size:.94rem}.books-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:54px}.book{display:grid;grid-template-columns:minmax(120px,34%) minmax(0,1fr);gap:24px;align-items:start}.cover-link{display:block;border:1px solid transparent;background:#eae6e0;min-width:44px;min-height:44px;transition:border-color .18s,box-shadow .18s,filter .18s}.cover-link img{width:100%;height:auto}.cover-link:hover{border-color:var(--red);box-shadow:0 8px 24px #17243c17;filter:brightness(1.03)}.cover-link:active{box-shadow:inset 0 0 0 2px var(--red);filter:brightness(.93)}.cover-link:focus-visible{outline:3px solid var(--red);outline-offset:5px}.book-status{font-size:.8rem;letter-spacing:.035em;color:var(--red);font-weight:650;margin-bottom:10px}.book h3{font-size:clamp(1.25rem,1.75vw,1.65rem)}.alternate-title{display:block;font-size:.88em;margin-top:4px}.creator{font-size:.86rem;color:var(--muted);margin-top:9px;line-height:1.75}.synopsis{font-size:.95rem;margin-top:15px;line-height:1.85}.tags{display:flex;flex-wrap:wrap;gap:9px 13px;margin-top:15px;font-size:.8rem;color:var(--muted)}.tags span{padding-bottom:2px;border-bottom:1px solid var(--line)}.book-facts{border-top:1px solid var(--line);padding-top:12px;margin-top:21px;font-size:.82rem}.book-facts>div{display:grid;grid-template-columns:6em minmax(0,1fr);gap:12px;margin-top:5px}.book-facts dt,.completed-facts dt{color:var(--muted)}
.completed{background:var(--white);border-block:1px solid var(--line)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:36px;margin-bottom:38px}.section-heading h2{margin-top:13px}.section-heading>p{max-width:420px;color:var(--muted);font-size:.95rem}.completed-list{border-top:1px solid var(--line)}.completed-book{display:grid;grid-template-columns:minmax(120px,180px) minmax(0,1fr) minmax(0,.68fr);gap:44px;align-items:start;padding:38px 0;border-bottom:1px solid var(--line)}.completed-book:last-child{padding-bottom:0;border:0}.completed-book h3{font-size:1.8rem}.completed-book .synopsis{max-width:520px}.completed-facts{border-left:1px solid var(--line);padding-left:34px;font-size:.9rem}.completed-facts>div+div{margin-top:20px}.completed-facts dd{margin-top:5px;line-height:1.7;color:var(--navy)}.edition-section .section-top{margin-bottom:30px}.edition-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:44px;border-top:1px solid var(--line);padding-top:30px}.edition-grid h3{font-size:1.15rem}.edition-grid p{font-size:.93rem;color:var(--muted);margin-top:14px}
.reading-section{background:var(--navy);color:#f8f5ef}.reading-section h2{color:#fffdf9}.reading-section .eyebrow{color:#e9b1a1}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:100px}.reading-layout h2{margin-top:20px}.reading-intro{color:#d2d7df;margin-top:28px;font-size:1.05rem}.reading-copy>p{color:#e1e3e9;font-size:.98rem}.reading-ranges{margin-top:32px;border-top:1px solid #647082}.reading-ranges>div{display:grid;grid-template-columns:70px minmax(0,1fr);gap:24px;padding:20px 0;border-bottom:1px solid #647082}.reading-ranges dt{color:#e9b1a1;font-weight:650}.reading-ranges dd{color:#e1e3e9;font-size:.93rem}.reading-copy>.reading-boundary{font-size:.85rem;color:#d2d7df;margin-top:22px}.device-app-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:100px}.device-app-layout h2{font-size:2rem;margin-top:18px}.device-app-layout p:not(.eyebrow){font-size:.94rem;color:var(--muted);margin-top:24px}.device-facts{margin-top:23px;border-top:1px solid var(--line);font-size:.9rem}.device-facts>div{padding:13px 0;display:grid;grid-template-columns:110px minmax(0,1fr);gap:20px;border-bottom:1px solid var(--line)}.device-facts dt{font-weight:650;color:var(--navy)}.app-info{border-left:1px solid var(--line);padding-left:44px}.device-app-layout p.app-note{font-size:.85rem}
.faq{padding-top:20px}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:76px}.faq-grid article{padding:25px 0;border-top:1px solid var(--line)}.faq-grid h3{font-size:1.05rem}.faq-grid p{font-size:.94rem;color:var(--muted);margin-top:12px}.about{border-top:1px solid var(--line);background:#eeeae5}.about-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:100px}.about h2{margin-top:16px}.about-layout p:not(.eyebrow){font-size:.95rem;color:#4a5260}.about-layout h3{font-size:1.1rem;margin:30px 0 12px}.about-layout>div:last-child>p+p{margin-top:16px}.site-footer{background:var(--navy);color:var(--paper);padding-block:24px}.site-footer>.wrap{display:flex;justify-content:space-between;gap:24px}.site-footer span:first-child{font-size:1.2rem;font-weight:650}.site-footer span:last-child{font-size:.86rem;color:#d2d7df}
.region-count{font-size:.88rem;letter-spacing:0;font-weight:500;color:var(--muted);margin-left:18px;white-space:nowrap}.books-pair{row-gap:42px}.book{padding-bottom:28px;border-bottom:1px solid var(--line)}.completed-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:44px;border-top:1px solid var(--line);padding-top:30px}.completed-index h3{font-size:1.2rem}.completed-index p{font-size:.94rem;color:var(--muted);margin-top:14px}.completed-index .completed-names{color:var(--navy);font-weight:650;line-height:1.9}.completed-index article+article{border-left:1px solid var(--line);padding-left:30px}@media(max-width:850px){.completed-index{grid-template-columns:1fr;gap:26px}.completed-index article+article{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}}@media(max-width:600px){.books-pair{row-gap:28px}.book{padding-bottom:26px}.completed-index{padding-top:24px}.region-count{margin-left:16px;font-size:.82rem}}
@media(min-width:1241px){.menu:not([open])>.main-nav{display:flex}}
@media(max-width:1240px){:root{--nav-offset:96px}.wrap{width:calc(100% - 72px)}.header-inner{min-height:76px;gap:24px}.menu{position:static}.menu summary{display:flex;gap:12px;align-items:center;justify-content:center;min-width:100px;min-height:46px;cursor:pointer;font-size:.9rem;color:var(--navy);list-style:none}.menu summary::-webkit-details-marker{display:none}.menu-mark{width:16px;height:9px;border-block:1.5px solid currentColor}.menu[open] .main-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:absolute;top:100%;left:0;right:0;max-height:var(--menu-height,60vh);overflow-y:auto;background:var(--white);padding:14px 30px 22px;border-bottom:1px solid var(--line);box-shadow:0 12px 18px #17243c0a;gap:8px}.menu:not([open]) .main-nav{display:none}.main-nav a{padding-inline:12px}.discovery-layout{gap:50px}.books-pair{gap:35px}.book{grid-template-columns:31% minmax(0,1fr);gap:21px}.reading-layout,.device-app-layout,.about-layout{gap:55px}.completed-book{gap:30px}.completed-facts{padding-left:25px}.edition-grid{gap:30px}}
@media(max-width:850px){.wrap{width:calc(100% - 48px)}.section-space{padding-block:60px}.hero-inner{padding-block:56px}.hero-brand{font-size:clamp(3.125rem,10vw,6rem)}.hero-tagline{font-size:1.4rem}.discovery-layout{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:32px}.section-top{display:block}.section-top>p{margin-top:8px}.update-list article{grid-template-columns:42px minmax(0,1fr);gap:15px}.update-state{display:none}.origin-index small{display:block;margin-left:0}.origin-index nav a{min-height:89px}.region-heading{align-items:start}.books-pair{grid-template-columns:1fr;gap:36px}.book{grid-template-columns:minmax(0,180px) minmax(0,1fr);gap:30px}.book h3{font-size:1.5rem}.completed-book{grid-template-columns:145px minmax(0,1fr);gap:24px}.completed-facts{grid-column:2;border-left:0;border-top:1px solid var(--line);padding:18px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.completed-facts>div+div{margin-top:0}.completed-facts>div:last-child{grid-column:1/-1}.edition-grid{grid-template-columns:1fr;gap:26px}.reading-layout{grid-template-columns:1fr;gap:35px}.device-app-layout{grid-template-columns:1fr;gap:45px}.app-info{border-left:0;border-top:1px solid var(--line);padding:38px 0 0}.faq-grid{column-gap:32px}.about-layout{grid-template-columns:1fr;gap:28px}.region-section:last-child{padding-bottom:60px}.section-heading{align-items:start}.section-heading>p{max-width:300px}}
@media(max-width:600px){:root{--nav-offset:94px}.wrap{width:calc(100% - 36px)}body{line-height:1.8}.header-inner{min-height:74px;gap:12px}.brand{font-size:1.25rem}.menu summary{min-width:94px;font-size:.86rem}.menu[open] .main-nav{grid-template-columns:repeat(2,minmax(0,1fr));padding:12px 18px 20px}.main-nav a{font-size:.92rem;min-height:48px}.hero-inner{padding-block:44px 48px}.hero-kicker{font-size:.82rem;margin-bottom:18px;letter-spacing:.06em}.hero-brand{font-size:clamp(2.75rem,12.6vw,4.6rem)}.hero-subtitle{font-size:.9rem;letter-spacing:.035em;margin-top:14px}.hero-tagline{font-size:1.2rem;margin-top:24px}.hero-intro{font-size:.94rem;margin-top:16px;line-height:1.9}.desktop-break{display:none}.hero-links{gap:28px;margin-top:22px;font-size:.9rem;flex-wrap:wrap}.section-space{padding-block:45px}.discovery-layout{display:flex;flex-direction:column;gap:36px;padding-bottom:0}.section-top h2{font-size:1.4rem}.update-list article{padding-block:18px}.update-list h3{font-size:1rem}.update-list p{font-size:.82rem}.update-list time span{font-size:1.4rem}.origin-index nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.origin-index nav a{display:block;min-height:88px;border-right:1px solid var(--line);text-align:center;padding:15px 4px;font-size:1.15rem}.origin-index nav a:last-child{border-right:0}.origin-index small{font-size:.75rem;margin-top:3px}.index-line{display:none}.origin-index>p{font-size:.86rem;margin-top:15px}.region-section{padding-block:38px 42px}.region-heading{display:block;margin-bottom:25px}.region-heading h2{font-size:2rem}.eyebrow{font-size:.75rem}.region-heading>p{font-size:.9rem;margin-top:11px}.books-pair{gap:33px}.book{grid-template-columns:minmax(0,36%) minmax(0,1fr);gap:18px}.book h3{font-size:1.14rem}.creator{font-size:.8rem;margin-top:7px}.synopsis{font-size:.88rem;margin-top:12px;line-height:1.8}.book-status{font-size:.76rem;margin-bottom:6px}.tags{font-size:.75rem;gap:7px 10px;margin-top:11px}.book-facts{grid-column:1/-1;font-size:.78rem;margin-top:15px;padding-top:9px}.book-facts>div{grid-template-columns:1fr;gap:0}.book-facts dd{margin-top:1px}.section-heading{display:block;margin-bottom:30px}.section-heading>p{max-width:none;font-size:.88rem;margin-top:17px}.completed-book{grid-template-columns:minmax(0,32%) minmax(0,1fr);gap:17px;padding-block:28px}.completed-book h3{font-size:1.3rem}.completed-facts{grid-column:1/-1;font-size:.86rem;gap:15px 25px;margin-top:2px}.completed-facts>div:last-child{grid-column:1/-1}.edition-grid h3{font-size:1.05rem}.edition-grid p{font-size:.9rem;margin-top:9px}.reading-layout h2{font-size:2rem}.reading-intro{margin-top:18px}.reading-ranges>div{grid-template-columns:45px minmax(0,1fr);gap:18px}.reading-copy>p{font-size:.94rem}.reading-ranges dd{font-size:.88rem}.device-app-layout h2{font-size:1.65rem}.device-facts>div{grid-template-columns:88px minmax(0,1fr);gap:14px}.faq{padding-top:5px}.faq-grid{grid-template-columns:1fr}.faq-grid article{padding-block:23px}.faq-grid h3{font-size:1rem}.faq-grid p{font-size:.9rem}.about-layout{gap:25px}.site-footer{padding-block:21px}.site-footer>.wrap{align-items:center;flex-wrap:wrap;gap:12px}.site-footer span:first-child{font-size:1.1rem}}
@media(max-width:360px){.hero-brand{font-size:12vw}.book{grid-template-columns:1fr}.cover-link{max-width:190px}.book-copy{min-width:0}.book h3{font-size:1.3rem}.book-facts>div{grid-template-columns:6em minmax(0,1fr);gap:10px}.completed-book{grid-template-columns:1fr}.completed-book .cover-link{max-width:180px}.completed-facts{grid-column:1}.hero-subtitle{letter-spacing:0}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
.reading-entry{display:inline-flex;align-items:center;min-height:48px;margin-top:26px;padding:9px 20px;border:1px solid #e9b1a1;color:#fffdf9;font-size:1rem;font-weight:650;transition:background .16s,box-shadow .16s}.reading-entry:hover{background:#293b57;box-shadow:0 4px 16px #0002}.reading-entry:active{background:#354965}.reading-entry:focus-visible{outline:3px solid #e9b1a1;outline-offset:5px}