:root{
--paper:#FFF8F2;--deep:#FFFFFF;--surface:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--hint:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08);--max:1160px;--radius:20px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.layer-open{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input{font:inherit}.site-header{position:fixed;inset:0 0 auto;z-index:80;background:var(--paper);box-shadow:0 1px 0 var(--line)}.masthead-wrap{height:72px;max-width:var(--max);margin:auto;padding:0 18px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.square-action,.close-action{border:0;background:transparent;color:var(--ink);cursor:pointer;min-width:44px;min-height:44px}.square-action{width:44px;border:1px solid var(--line);border-radius:13px;display:grid;place-items:center}.menu-trigger{padding:12px;gap:4px;align-content:center}.menu-trigger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:10px}.brand-lockup{display:flex;align-items:center;justify-content:center;min-height:44px}.brand-logo{max-height:38px;max-width:220px;width:auto}.brand-text{font-weight:900;color:var(--ink);font-size:22px;letter-spacing:.06em}.masthead-actions{justify-self:end;display:flex;align-items:center;gap:10px}.search-icon{width:17px;height:17px;border:2px solid currentColor;border-radius:50%;display:block;position:relative}.search-icon:after{content:"";position:absolute;width:7px;height:2px;background:currentColor;right:-5px;bottom:-2px;transform:rotate(45deg);border-radius:2px}.app-link,.button-primary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;font-weight:800;transition:.2s ease}.app-link,.button-primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;box-shadow:0 10px 20px rgba(99,102,241,.18)}.button-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.app-link:hover,.button-primary:hover{transform:translateY(-1px);box-shadow:0 14px 24px rgba(99,102,241,.23)}.button-secondary:hover{border-color:rgba(26,18,48,.26)}a:focus-visible,button:focus-visible{outline:3px solid rgba(8,145,178,.28);outline-offset:3px}.chapter-bar{height:46px;background:#fff;border-top:1px solid var(--line)}.chapter-inner{height:100%;max-width:860px;margin:auto;display:flex;align-items:center;justify-content:center;gap:34px}.chapter-inner a{height:100%;display:flex;align-items:center;position:relative;color:var(--muted);font-weight:700;font-size:15px}.chapter-inner a.active{color:var(--ink)}.chapter-inner a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--pink)}.site-main{padding-top:118px}.page-shell{max-width:var(--max);margin:auto;padding:54px 20px 86px}.page-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:42px;align-items:center;padding:34px 0 46px}.page-kicker{display:flex;align-items:center;gap:10px;color:var(--pink);font-weight:900;letter-spacing:.08em;font-size:13px}.page-kicker:before{content:"";width:28px;height:3px;background:currentColor;border-radius:3px}.page-hero h1,.cover-copy h1{margin:10px 0 16px;color:var(--ink);font-size:clamp(28px,4vw,34px);line-height:1.28;letter-spacing:-.02em}.lead{font-size:17px;color:var(--muted);max-width:760px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.media-slot{margin:0;width:100%;max-height:360px;border-radius:22px;overflow:hidden;background:linear-gradient(135deg,#fff 0%,#F3EBE3 100%);border:1px solid var(--line);box-shadow:var(--shadow)}.media-slot img{width:100%;max-height:360px;object-fit:cover}.media-placeholder{min-height:250px;position:relative}.media-placeholder:before,.media-placeholder:after{content:"";position:absolute;border-radius:999px;filter:saturate(.9)}.media-placeholder:before{width:180px;height:180px;background:rgba(99,102,241,.10);left:12%;top:15%}.media-placeholder:after{width:140px;height:140px;background:rgba(225,29,143,.09);right:12%;bottom:10%}.section{padding:44px 0;border-top:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.section-head h2{margin:0;color:var(--ink);font-size:24px}.section-head p{margin:0;color:var(--muted);max-width:620px}.eyebrow{display:block;color:var(--pink);font-size:12px;font-weight:900;letter-spacing:.12em;margin-bottom:7px}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.content-card h3{margin:0 0 9px;color:var(--ink);font-size:19px}.content-card p{margin:0;color:var(--muted)}.content-card .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.tag{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;background:var(--soft);color:var(--ink);font-size:12px;font-weight:800}.tag.pink{background:rgba(225,29,143,.10);color:#A31269}.tag.indigo{background:rgba(99,102,241,.11);color:#4B4ECC}.tag.cyan{background:rgba(8,145,178,.11);color:#087991}.tag.amber{background:rgba(217,119,6,.12);color:#A35B05}.tag.mint{background:rgba(5,150,105,.11);color:#047857}.text-link{display:inline-flex;align-items:center;min-height:44px;margin-top:8px;font-weight:850;color:var(--indigo)}.text-link:after{content:"→";margin-left:7px}.prose{max-width:820px}.prose p{margin:0 0 1.15em}.prose h2{margin:1.9em 0 .6em;color:var(--ink);font-size:23px}.prose h3{margin:1.5em 0 .5em;color:var(--ink);font-size:18px}.notice{background:var(--soft);border:1px solid var(--line);border-radius:18px;padding:20px 22px;color:var(--muted)}.number-list{display:grid;gap:14px}.number-row{display:grid;grid-template-columns:84px 1fr;gap:20px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.big-number{font-size:42px;font-weight:950;line-height:1;color:var(--pink)}.number-row:nth-child(2) .big-number{color:var(--indigo)}.number-row:nth-child(3) .big-number{color:var(--cyan)}.number-row:nth-child(4) .big-number{color:var(--amber)}.number-row:nth-child(5) .big-number{color:var(--mint)}.number-row h3{margin:0 0 5px;color:var(--ink)}.number-row p{margin:0;color:var(--muted)}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--pink),var(--indigo),var(--cyan),var(--amber))}.timeline-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin-bottom:16px}.timeline-item:before{content:"";position:absolute;left:-27px;top:28px;width:12px;height:12px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 5px var(--paper)}.timeline-item h3{margin:0 0 6px;color:var(--ink)}.timeline-item p{margin:0;color:var(--muted)}.status{display:inline-flex;min-height:27px;align-items:center;padding:0 9px;border-radius:999px;font-size:12px;font-weight:900;background:var(--soft);color:var(--ink);margin-bottom:10px}.shelf-list{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:120px 1fr auto;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:17px 20px}.shelf-row .label{font-weight:900;color:var(--ink)}.shelf-row p{margin:0;color:var(--muted)}.shelf-row a{font-weight:850;color:var(--indigo);min-height:44px;display:inline-flex;align-items:center}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.topic-tile{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;min-height:145px;display:flex;flex-direction:column}.topic-tile:nth-child(2n){min-height:178px}.topic-dot{width:11px;height:11px;border-radius:50%;background:var(--pink);margin-bottom:16px}.topic-tile:nth-child(4n+2) .topic-dot{background:var(--indigo)}.topic-tile:nth-child(4n+3) .topic-dot{background:var(--cyan)}.topic-tile:nth-child(4n) .topic-dot{background:var(--amber)}.topic-tile h3{margin:0 0 7px;color:var(--ink)}.topic-tile p{margin:0 0 12px;color:var(--muted);font-size:14px}.topic-tile a{margin-top:auto;font-weight:850;color:var(--ink)}.cover{padding:48px 0 54px}.cover-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.9fr);gap:44px;align-items:center}.vertical-label{writing-mode:vertical-rl;text-orientation:upright;float:left;margin-right:16px;color:var(--pink);font-size:13px;font-weight:900;letter-spacing:.16em}.cover-copy .intro{font-size:17px;color:var(--muted);max-width:640px}.cover-media .media-slot{max-height:360px}.cover-media .media-slot img{max-height:360px}.feature-grid{display:grid;grid-template-columns:1.15fr .85fr .95fr;gap:18px;align-items:start}.feature-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}.feature-card:nth-child(2){margin-top:32px}.feature-card:nth-child(3){margin-top:12px}.feature-card .media-slot{box-shadow:none;margin-bottom:16px}.feature-card h3{margin:0 0 8px;color:var(--ink)}.feature-card p{margin:0;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;counter-reset:step}.step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;counter-increment:step}.step:before{content:"0" counter(step);display:block;font-weight:950;color:var(--pink);font-size:22px;margin-bottom:12px}.step h3{margin:0 0 7px;color:var(--ink)}.step p{margin:0;color:var(--muted)}.split-media{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}.app-panel{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.app-copy h2{margin:0 0 12px;color:var(--ink);font-size:24px}.app-copy p{color:var(--muted)}.app-icon-row{display:flex;align-items:center;gap:14px;margin-bottom:16px}.app-icon-row img{width:62px;height:62px;border-radius:16px;object-fit:cover}.app-icon-fallback{width:62px;height:62px;border-radius:16px;background:linear-gradient(135deg,#6366F1,#E11D8F,#D97706)}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:var(--ink);font-size:18px}.faq-item p{margin:0;color:var(--muted)}.site-footer{background:var(--ink);color:#F7EFE6;padding:56px 20px 84px}.footer-inner{max-width:var(--max);margin:auto}.footer-brand{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.12)}.footer-logo-link{display:flex;align-items:center;gap:14px;max-width:max-content}.footer-logo{max-height:36px;max-width:190px}.footer-logo-link span{display:flex;flex-direction:column}.footer-logo-link strong{font-size:19px}.footer-logo-link em{font-style:normal;font-size:11px;letter-spacing:.14em;color:rgba(247,239,230,.66)}.footer-brand p{margin:0;color:rgba(247,239,230,.72)}.footer-directory{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:30px 0}.footer-directory h2{font-size:14px;margin:0 0 10px;color:#fff}.footer-directory a{display:block;color:rgba(247,239,230,.72);min-height:36px}.footer-directory a:hover{color:#fff}.footer-bottom{display:flex;gap:18px;flex-wrap:wrap;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:rgba(247,239,230,.62);font-size:13px}.footer-bottom span{margin-right:auto}.page-overlay,.book-menu,.search-layer{position:fixed;inset:0;visibility:hidden;pointer-events:none;opacity:0;transition:.2s ease}.page-overlay{z-index:110;background:rgba(26,18,48,.46);backdrop-filter:blur(4px)}.page-overlay.is-open{visibility:visible;pointer-events:auto;opacity:1}.book-menu,.search-layer{z-index:120;display:grid;place-items:center;padding:20px}.book-menu.is-open,.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.book-menu-card{width:min(840px,calc(100vw - 32px));max-height:calc(100vh - 40px);overflow:auto;background:#fff;border-radius:24px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(26,18,48,.25)}.book-menu-head,.search-head{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;border-bottom:1px solid var(--line)}.book-brand{display:flex;align-items:center;gap:12px}.book-brand img{max-height:34px;max-width:160px}.book-brand span{display:flex;flex-direction:column}.book-brand em{font-style:normal;font-size:10px;color:var(--hint);letter-spacing:.14em}.close-action{font-size:30px;line-height:1}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:22px}.book-page:first-child{border-right:1px solid var(--line)}.book-page section+section{margin-top:24px}.book-page h2{font-size:13px;color:var(--pink);letter-spacing:.12em;margin:0 0 8px}.book-page a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.book-page a strong{display:block;color:var(--ink);font-size:15px}.book-page a span{display:block;color:var(--muted);font-size:12px;line-height:1.6;margin-top:3px}.search-card{width:min(620px,calc(100vw - 32px));background:#fff;border-radius:22px;border:1px solid var(--line);box-shadow:0 30px 80px rgba(26,18,48,.25);padding-bottom:22px}.search-head span{font-size:12px;color:var(--pink);font-weight:900}.search-head h2{margin:2px 0 0;color:var(--ink);font-size:21px}.search-look{margin:22px;display:flex;align-items:center;gap:12px;background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:0 18px;min-height:52px;color:var(--muted)}.search-look input{width:100%;border:0;outline:0;background:transparent;color:var(--muted)}.search-note{margin:0 22px 16px;color:var(--hint);font-size:13px}.preset-links{display:flex;gap:9px;flex-wrap:wrap;padding:0 22px}.preset-links a{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:999px;background:var(--soft);font-weight:800;color:var(--ink)}.mobile-bottom{display:none}
@media(max-width:900px){.card-grid.four,.topic-grid,.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-grid{grid-template-columns:1fr 1fr}.feature-card:nth-child(3){grid-column:1/-1;margin-top:0}.page-hero,.cover-grid,.app-panel,.split-media{grid-template-columns:1fr}.page-hero .media-slot,.cover-media{max-width:680px}.footer-brand{grid-template-columns:1fr}.footer-directory{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.site-header{box-shadow:0 1px 0 var(--line)}.masthead-wrap{height:66px;padding:0 16px;grid-template-columns:52px minmax(0,1fr) auto}.brand-logo{max-height:32px;max-width:150px}.brand-text{font-size:19px}.masthead-actions .search-trigger{display:none}.app-link{min-width:44px;padding:0 13px;font-size:13px}.chapter-bar{display:none}.site-main{padding-top:66px}.page-shell{padding:34px 16px 78px}.page-hero,.cover{padding-top:28px}.page-hero{gap:24px}.cover-grid{gap:24px}.page-hero h1,.cover-copy h1{font-size:29px}.section{padding:34px 0}.section-head{display:block}.section-head p{margin-top:7px}.card-grid,.card-grid.two,.card-grid.four,.feature-grid,.topic-grid,.steps{grid-template-columns:1fr}.feature-card:nth-child(2),.feature-card:nth-child(3){margin-top:0}.feature-card:nth-child(3){grid-column:auto}.number-row{grid-template-columns:62px 1fr;padding:18px}.big-number{font-size:34px}.shelf-row{grid-template-columns:1fr;gap:5px}.footer-directory{grid-template-columns:1fr 1fr}.footer-bottom span{width:100%;margin-right:0}.site-footer{padding-bottom:110px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:70;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(--line);box-shadow:0 -6px 22px rgba(26,18,48,.05)}.mobile-bottom a{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0;font-size:10px;color:var(--muted);gap:1px}.mobile-bottom a span{font-size:17px;line-height:1}.mobile-bottom a.active{color:var(--pink);font-weight:900}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid var(--line)}.book-menu{padding:12px}.book-menu-card{width:calc(100vw - 24px);max-height:calc(100vh - 24px);border-radius:20px}.book-page{padding:18px}.search-layer{padding:12px}.search-card{width:calc(100vw - 24px)}.media-placeholder{min-height:210px}}
@media(max-width:420px){.masthead-wrap{grid-template-columns:46px minmax(0,1fr) 76px;padding:0 12px}.square-action{width:44px}.app-link{padding:0 10px}.footer-directory{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr}.hero-actions{flex-direction:column;align-items:stretch}.hero-actions a{width:100%}}