:root{--paper:#FFF8F2;--white:#fff;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--assist:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--border:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.masthead{position:fixed;inset:0 0 auto;z-index:50;height:72px;background:rgba(255,248,242,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(12px)}.mast-inner{max-width:1160px;height:100%;margin:auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand{justify-self:center;display:flex;align-items:center;min-height:44px}.brand img{max-height:38px;max-width:210px;object-fit:contain}.brand strong{font-size:22px;color:var(--ink);letter-spacing:.08em}.icon-btn,.text-btn,.close-btn{border:0;background:transparent;color:var(--ink);min-width:44px;min-height:44px;cursor:pointer}.icon-btn{display:flex;flex-direction:column;gap:5px;align-items:flex-start;justify-content:center}.icon-btn span{display:block;width:24px;height:2px;background:var(--ink);border-radius:9px}.mast-actions{justify-self:end;display:flex;align-items:center;gap:8px}.pill-link,.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:999px;font-weight:700}.pill-link,.btn-primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:white}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--border)}.chapterbar{position:fixed;top:72px;left:0;right:0;z-index:45;height:46px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:center;align-items:stretch}.chapterbar a{display:flex;align-items:center;padding:0 20px;color:var(--muted);position:relative}.chapterbar a.active{color:var(--ink);font-weight:700}.chapterbar a.active:after{content:"";position:absolute;left:20px;right:20px;bottom:0;height:3px;background:var(--pink);border-radius:3px 3px 0 0}.site-main{padding-top:118px}.wrap{max-width:1160px;margin:auto;padding:0 20px}.hero,.page-hero{max-width:1160px;margin:auto;padding:56px 20px 28px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:42px;align-items:center}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--pink);text-transform:uppercase}.hero h1,.page-hero h1{font-size:clamp(28px,4.2vw,34px);line-height:1.18;color:var(--ink);margin:10px 0 18px}.hero p,.page-hero p{font-size:17px;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.media-slot{background:linear-gradient(145deg,#fff,#f3ebe3);border:1px solid var(--border);border-radius:22px;min-height:260px;display:grid;place-items:center;overflow:hidden}.media-slot img{width:100%;max-height:360px;object-fit:contain}.section{max-width:1160px;margin:auto;padding:42px 20px}.section-head{display:flex;gap:20px;align-items:end;justify-content:space-between;margin-bottom:20px}.section h2,.content-card h2{font-size:26px;line-height:1.25;color:var(--ink);margin:0}.section-head p{max-width:700px;margin:0;color:var(--muted)}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card,.content-card,.step-card,.note-card,.faq-item,.term-card{background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}.tag-card{padding:18px}.tag-card .dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.tag-card:nth-child(4n+1) .dot{background:var(--pink)}.tag-card:nth-child(4n+2) .dot{background:var(--indigo)}.tag-card:nth-child(4n+3) .dot{background:var(--cyan)}.tag-card:nth-child(4n) .dot{background:var(--amber)}.tag-card h3{display:inline;font-size:18px;color:var(--ink)}.tag-card p{margin:9px 0 10px;color:var(--muted)}.text-link{font-weight:700;color:var(--indigo)}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.72fr);gap:28px;align-items:start}.content-card{padding:26px}.content-card p{margin:.7em 0}.media-card{border-radius:20px;overflow:hidden;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow)}.media-card img{width:100%;display:block;max-height:360px;object-fit:contain}.chapter-list{display:grid;gap:12px;margin-top:22px}.chapter-list a{display:grid;grid-template-columns:48px 1fr;gap:12px;padding:14px 0;border-top:1px solid var(--border)}.chapter-list b{font-size:22px;color:var(--pink)}.chapter-list span{color:var(--muted)}.masonry3{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:18px;align-items:start}.masonry3 .content-card:nth-child(2){margin-top:28px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step-card{padding:20px}.step-card b{font-size:28px;color:var(--indigo)}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.theme-grid .content-card:nth-child(2),.theme-grid .content-card:nth-child(5){transform:translateY(18px)}.shelf-list{display:grid;gap:10px}.shelf-row{display:grid;grid-template-columns:48px 1fr auto;gap:14px;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--border);border-radius:16px}.shelf-row b{font-size:22px;color:var(--amber)}.shelf-row span{color:var(--muted)}.rank-list{display:grid;gap:14px}.rank-item{display:grid;grid-template-columns:86px 1fr;gap:18px;align-items:start;padding:20px;background:#fff;border:1px solid var(--border);border-radius:18px}.rank-num{font-size:50px;font-weight:900;line-height:1;color:var(--pink)}.rank-item:nth-child(2) .rank-num{color:var(--indigo)}.rank-item:nth-child(3) .rank-num{color:var(--cyan)}.rank-item:nth-child(4) .rank-num{color:var(--amber)}.rank-item:nth-child(5) .rank-num{color:var(--mint)}.timeline{position:relative;padding-left:32px;display:grid;gap:18px}.timeline:before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:2px;background:var(--border)}.timeline-item{position:relative;background:#fff;border:1px solid var(--border);border-radius:18px;padding:18px 20px}.timeline-item:before{content:"";position:absolute;width:14px;height:14px;left:-29px;top:24px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 6px var(--paper)}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:var(--soft);color:var(--ink);font-size:13px;font-weight:700}.prose{max-width:850px;margin:auto}.prose .content-card{margin-bottom:18px}.prose h2{margin:0 0 8px}.prose h3{color:var(--ink)}.faq-list{display:grid;gap:12px}.faq-item{padding:20px}.faq-item h2{font-size:18px;margin:0 0 8px}.faq-item p{margin:0;color:var(--muted)}.site-footer{margin-top:70px;background:#1A1230;color:#F7EFE6;padding:48px max(20px,calc((100vw - 1160px)/2)) 90px}.footer-brand{display:flex;gap:14px;align-items:center;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:22px}.footer-brand img{max-height:36px;max-width:180px;object-fit:contain}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{font-size:12px;opacity:.72;letter-spacing:.12em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:28px 0}.footer-grid h2{font-size:15px}.footer-grid a{display:block;color:#F7EFE6;opacity:.82;margin:7px 0}.footer-note,.copyright{color:#F7EFE6;opacity:.72}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.42);z-index:70;opacity:0;pointer-events:none;transition:.18s}.overlay.show{opacity:1;pointer-events:auto}.book-menu,.search-layer{position:fixed;z-index:80;left:50%;top:50%;transform:translate(-50%,-48%) scale(.98);opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.book-menu.show,.search-layer.show{transform:translate(-50%,-50%) scale(1);opacity:1;visibility:visible;pointer-events:auto}.book-menu{width:min(840px,calc(100vw - 32px));max-height:min(80vh,760px);overflow:auto;background:#fff;border-radius:22px;box-shadow:0 30px 80px rgba(26,18,48,.24)}.book-head,.search-head{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;border-bottom:1px solid var(--border)}.book-brand{display:flex;align-items:center;gap:10px;color:var(--ink)}.book-brand img{max-height:28px;max-width:140px}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:24px}.book-page:first-child{border-right:1px solid var(--border)}.book-page h2{font-size:14px;color:var(--pink);letter-spacing:.12em}.book-page a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.book-page b{display:block;color:var(--ink)}.book-page span{display:block;color:var(--muted);font-size:13px}.search-layer{width:min(620px,calc(100vw - 32px))}.search-card{background:#fff;border-radius:22px;box-shadow:0 30px 80px rgba(26,18,48,.24)}.search-head h2{font-size:20px;color:var(--ink)}.fake-search{margin:22px;border:1px solid var(--border);border-radius:999px;padding:14px 18px;color:var(--assist)}.search-links{display:flex;flex-wrap:wrap;gap:10px;padding:0 22px 24px}.search-links a{padding:9px 13px;background:var(--soft);border-radius:999px;color:var(--ink)}.mobile-nav{display:none}.callout{padding:18px;border-left:4px solid var(--pink);background:#fff;border-radius:0 14px 14px 0}.muted{color:var(--muted)}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--soft);font-size:13px;color:var(--ink)}a:focus-visible,button:focus-visible{outline:3px solid rgba(99,102,241,.35);outline-offset:3px}.tag-card:hover,.content-card:hover,.shelf-row:hover{transform:translateY(-2px);transition:.18s}
@media(max-width:820px){.chapterbar{display:none}.site-main{padding-top:72px}.mast-inner{padding:0 16px}.text-btn{display:none}.pill-link{padding:8px 12px}.hero,.page-hero,.section,.wrap{padding-left:16px;padding-right:16px}.hero-grid,.split{grid-template-columns:1fr}.hero-grid{gap:24px}.media-slot{min-height:180px}.tag-grid{grid-template-columns:repeat(2,1fr)}.masonry3{grid-template-columns:1fr}.masonry3 .content-card:nth-child(2){margin-top:0}.steps{grid-template-columns:repeat(2,1fr)}.theme-grid{grid-template-columns:1fr 1fr}.theme-grid .content-card:nth-child(2),.theme-grid .content-card:nth-child(5){transform:none}.footer-grid{grid-template-columns:1fr 1fr}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid var(--border)}.mobile-nav{position:fixed;z-index:60;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(5,1fr);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border)}.mobile-nav a{display:grid;place-items:center;font-size:13px;min-width:0}.mobile-nav a.active{color:var(--pink);font-weight:800}.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}.rank-item{grid-template-columns:60px 1fr}.rank-num{font-size:40px}}
@media(max-width:520px){.brand img{max-width:150px}.mast-actions{gap:4px}.pill-link{font-size:13px}.tag-grid,.steps,.theme-grid,.footer-grid{grid-template-columns:1fr}.shelf-row{grid-template-columns:42px 1fr}.shelf-row .text-link{grid-column:2}.section{padding-top:34px;padding-bottom:34px}.section-head{display:block}.section-head p{margin-top:8px}}

/* 内容图片统一尺寸：保持完整比例，避免原图过高撑大页面 */
.content-card>img,.media-card img,.media-slot img{display:block;width:100%;height:auto;max-height:300px;object-fit:contain;object-position:center;margin-left:auto;margin-right:auto}
.content-card>img{margin-bottom:18px;border-radius:14px;background:var(--soft)}
.media-card{display:flex;align-items:center;justify-content:center;min-height:0;padding:0}

@media(max-width:820px){.content-card>img,.media-card img,.media-slot img{max-height:220px}.media-slot{min-height:0}.media-card{min-height:0}.content-card>img{margin-bottom:14px}}
@media(max-width:520px){.content-card>img,.media-card img,.media-slot img{max-height:190px}}
/* Image size guard: keeps every content image inside a readable magazine scale. */
.site-main img{max-width:100%;height:auto;object-fit:contain;object-position:center}
.site-main .media-slot img,.site-main .media-card img,.site-main .content-card>img{width:auto;max-width:100%;max-height:300px}
.app-icon-box{margin-top:14px;display:flex;align-items:center;justify-content:flex-start}
.app-icon-box .app-icon{display:block;width:88px;height:88px;max-width:88px;max-height:88px;object-fit:contain;border-radius:20px}
@media(max-width:820px){
  .site-main .media-slot img,.site-main .media-card img,.site-main .content-card>img{max-height:210px}
  .app-icon-box .app-icon{width:76px;height:76px;max-width:76px;max-height:76px;border-radius:18px}
}
@media(max-width:520px){
  .site-main .media-slot img,.site-main .media-card img,.site-main .content-card>img{max-height:180px}
  .app-icon-box .app-icon{width:68px;height:68px;max-width:68px;max-height:68px;border-radius:16px}
}