:root{--bg:#EEF5FB;--deep:#E3EEF7;--surface:#FFFFFF;--secondary:#D7E8F4;--ink:#10263A;--text:#243848;--muted:#5A7388;--soft:#7E93A6;--blue:#3B9FE0;--bright:#62B7EE;--steel:#1E6FB8;--ice:#A9D6F2;--mint:#2FA8A0;--border:rgba(30,111,184,.16);--border-strong:rgba(59,159,224,.38);--shadow:0 16px 40px rgba(16,38,58,.08);--max:1220px;--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);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}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}.shell-inner,.content-wrap{width:min(calc(100% - 32px),var(--max));margin:0 auto}.site-shell{position:fixed;z-index:40;inset:0 0 auto 0}.window-strip{height:22px;background:var(--steel);color:#fff;font-size:12px}.window-strip-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.strip-search{border:0;background:transparent;color:#fff;min-height:22px;padding:0 8px}.strip-search:focus-visible,.toolbox-button:focus-visible,.icon-close:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid rgba(98,183,238,.55);outline-offset:3px}.viewport-bar{height:70px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(14px)}.viewport-inner{height:70px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{justify-self:start;display:inline-flex;align-items:center;min-height:44px}.brand-link img,.footer-logo img,.drawer-brand img{height:34px;width:auto;object-fit:contain}.brand-text,.footer-logo span,.drawer-brand span{display:flex;flex-direction:column;line-height:1.12}.brand-text strong,.footer-logo strong,.drawer-brand strong{color:var(--ink);font-size:18px}.brand-text small,.footer-logo small,.drawer-brand small{color:var(--muted);font-size:10px;letter-spacing:.12em;margin-top:3px}.toolbox-button{min-height:44px;padding:0 18px;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface);color:var(--steel);display:flex;align-items:center;gap:10px}.toolbox-button i{width:18px;height:12px;border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}.toolbox-button i:after{content:"";position:absolute;left:0;right:0;top:4px;border-top:2px solid currentColor}.app-shortcut{justify-self:end;min-height:44px;display:inline-flex;align-items:center;padding:0 18px;border-radius:10px;color:#fff;background:linear-gradient(135deg,#62B7EE 0%,#3B9FE0 48%,#1E6FB8 100%);font-weight:700}.tab-track{height:44px;background:var(--secondary);border-bottom:1px solid var(--border)}.tab-inner{height:44px;display:flex;align-items:center;gap:8px}.tab-inner a{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:8px;color:var(--ink);font-size:14px}.tab-inner a.is-current{background:var(--blue);color:#fff}.page-main{padding-top:154px;min-height:70vh}.page-hero{padding:44px 0 24px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--steel);font-size:13px;font-weight:800;letter-spacing:.08em}.eyebrow:before{content:"";width:24px;height:2px;background:var(--mint)}h1,h2,h3{color:var(--ink);line-height:1.25;margin-top:0}h1{font-size:clamp(28px,4vw,32px);margin-bottom:16px}h2{font-size:clamp(22px,3vw,27px);margin-bottom:14px}h3{font-size:18px;margin-bottom:8px}p{margin:0 0 14px}.lede{font-size:17px;max-width:860px;color:var(--muted)}.section{padding:30px 0}.section-alt{background:var(--deep)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px}.section-head p{max-width:680px;color:var(--muted)}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:0 10px 28px rgba(16,38,58,.05)}.card p:last-child{margin-bottom:0}.card-tag{display:inline-flex;padding:3px 8px;border-radius:7px;background:var(--secondary);color:var(--steel);font-size:12px;font-weight:800;margin-bottom:10px}.text-link{display:inline-flex;align-items:center;min-height:44px;color:var(--steel);font-weight:800}.text-link:after{content:"→";margin-left:8px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn-primary,.btn-secondary{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:10px;font-weight:800}.btn-primary{background:linear-gradient(135deg,#62B7EE 0%,#3B9FE0 48%,#1E6FB8 100%);color:#fff}.btn-secondary{background:#fff;color:var(--steel);border:1px solid var(--border-strong)}.media-slot{width:100%;height:220px;border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-slot.banner{max-height:300px;height:min(300px,46vw)}.media-slot.app-visual{height:420px}.media-fallback{position:relative;background:linear-gradient(135deg,#fff 0%,#EAF5FC 45%,#D7E8F4 100%)}.media-fallback:before{content:"91 BROWSER";position:absolute;color:rgba(30,111,184,.55);font-weight:900;letter-spacing:.16em;font-size:clamp(14px,3vw,28px)}.media-fallback span{position:absolute;border-radius:999px;background:rgba(98,183,238,.22)}.media-fallback span:nth-child(1){width:36%;height:36%;left:8%;top:18%}.media-fallback span:nth-child(2){width:22%;height:22%;right:12%;bottom:14%;background:rgba(47,168,160,.16)}.media-fallback span:nth-child(3){width:10%;height:10%;right:30%;top:18%;background:rgba(30,111,184,.14)}.hero-copy{padding:22px 0 10px}.hero-copy .lede{max-width:900px}.tag-ribbon{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}.tag-ribbon article{padding:16px;border-radius:12px;background:#fff;border:1px solid var(--border)}.tag-ribbon article:nth-child(even){border-top:4px solid var(--mint)}.tag-ribbon article:nth-child(odd){border-top:4px solid var(--bright)}.tag-ribbon p{font-size:14px;color:var(--muted)}.number-list{display:grid;gap:12px}.number-item{display:grid;grid-template-columns:58px 1fr auto;gap:14px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px 16px}.number-item b{font-size:28px;color:var(--steel);line-height:1}.number-item p{margin:0;color:var(--muted)}.number-item a{color:var(--steel);font-weight:800}.theme-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.theme-tile{min-height:170px;padding:20px;border-radius:14px;border:1px solid var(--border);background:linear-gradient(145deg,#fff,#DCEEF8);display:flex;flex-direction:column;justify-content:space-between}.theme-tile:nth-child(2n){background:linear-gradient(145deg,#F7FFFE,#D9F0EB)}.shelf-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.shelf-item{background:#fff;border-left:5px solid var(--bright);border-radius:10px;padding:18px;border-top:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}.timeline{position:relative;margin-left:12px;padding-left:30px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:var(--ice)}.timeline-item{position:relative;padding:0 0 22px}.timeline-item:before{content:"";position:absolute;left:-29px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--steel);border:3px solid var(--bg)}.status{display:inline-flex;padding:2px 8px;border-radius:7px;background:var(--secondary);color:var(--steel);font-size:12px;font-weight:800}.quote-note{border-left:4px solid var(--mint);padding:10px 0 10px 18px;color:var(--muted)}.prose{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px}.prose p{max-width:920px}.index-intro{padding:26px 0 10px}.split{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:center}.app-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;align-items:center}.icon-badge{width:72px;height:72px;border-radius:16px;background:var(--secondary);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:14px}.icon-badge img{width:100%;height:100%;object-fit:contain}.plain-icon{font-weight:900;color:var(--steel);font-size:22px}.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px}.faq-item h2,.faq-item h3{font-size:18px;margin-bottom:8px}.faq-item p{color:var(--muted);margin:0}.notice{background:#fff;border:1px solid var(--border-strong);border-radius:12px;padding:18px;color:var(--muted)}.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.directory a,.directory article{display:block;background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px}.directory a:hover{border-color:var(--border-strong);transform:translateY(-1px)}.site-footer{background:var(--ink);color:#C7D8E6;padding:42px 0 calc(20px + env(safe-area-inset-bottom))}.footer-grid{display:grid;grid-template-columns:1fr 2fr;gap:42px}.footer-brand p{max-width:440px;color:#C7D8E6}.footer-logo{display:inline-flex;margin-bottom:16px}.footer-logo strong{color:#fff}.footer-logo small{color:#AFC6D8}.footer-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.footer-links div{display:flex;flex-direction:column;gap:7px}.footer-links strong{color:#fff;margin-bottom:4px}.footer-links a{font-size:14px;color:#C7D8E6}.footer-links a:hover{color:#fff}.footer-bottom{margin-top:30px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:13px}.site-overlay{position:fixed;z-index:70;inset:0;background:rgba(16,38,58,.36);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.drawer-open .site-overlay,.search-open .site-overlay{opacity:1;visibility:visible;pointer-events:auto}.tool-drawer{position:fixed;z-index:80;right:0;top:0;bottom:0;width:min(420px,86vw);background:#fff;box-shadow:-20px 0 50px rgba(16,38,58,.16);transform:translateX(102%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s;overflow:auto}.drawer-open{overflow:hidden}.drawer-open .tool-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:14px 18px;z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px}.icon-close{width:44px;height:44px;border:0;border-radius:10px;background:var(--secondary);color:var(--ink);font-size:26px;line-height:1}.drawer-groups{padding:10px 18px 28px}.drawer-groups section{padding:14px 0;border-bottom:1px solid var(--border)}.drawer-groups h2{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--steel);margin-bottom:8px}.drawer-groups a{display:block;padding:10px 0}.drawer-groups a strong{display:block;color:var(--ink)}.drawer-groups a span{display:block;color:var(--muted);font-size:13px;margin-top:2px}.search-layer{position:fixed;z-index:85;left:0;right:0;top:92px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-open{overflow:hidden}.search-open .search-layer{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(calc(100% - 32px),760px);margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:0 0 16px 16px;box-shadow:var(--shadow);padding:20px}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;color:var(--ink)}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;min-height:48px;border:1px solid var(--border-strong);border-radius:10px;padding:0 14px;color:var(--ink);background:#fff}.preset-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.preset-links a{border:1px solid var(--border);border-radius:10px;padding:12px;color:var(--ink)}.preset-links a span{display:block;color:var(--muted);font-size:12px}.mobile-bottom{display:none}
@media(max-width:900px){.tag-ribbon{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:repeat(4,1fr)}.split,.app-panel{grid-template-columns:1fr}.media-slot.app-visual{height:360px}}
@media(max-width:680px){body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}.viewport-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.brand-link{min-width:0}.brand-link img{max-width:120px}.brand-text strong{font-size:16px}.brand-text small{font-size:8px}.toolbox-button{padding:0 10px}.toolbox-button i{display:none}.app-shortcut{padding:0 10px;font-size:13px}.tab-track{display:none}.page-main{padding-top:104px}.page-hero{padding-top:32px}.grid-2,.grid-3,.grid-4,.directory,.shelf-grid,.theme-grid{grid-template-columns:1fr}.tag-ribbon{grid-template-columns:repeat(2,1fr)}.number-item{grid-template-columns:48px 1fr}.number-item a{grid-column:2}.section-head{display:block}.media-slot{height:200px}.media-slot.banner{height:min(300px,58vw)}.footer-links{grid-template-columns:repeat(2,1fr)}.search-layer{top:0;bottom:0;background:var(--secondary);padding:16px;overflow:auto}.search-card{width:100%;margin:0;border-radius:14px}.preset-links{grid-template-columns:1fr}.mobile-bottom{position:fixed;display:grid;z-index:60;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border);box-shadow:0 -8px 24px rgba(16,38,58,.08)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;color:var(--muted);font-size:13px}.mobile-bottom a.is-current{background:var(--blue);color:#fff}.drawer-open .mobile-bottom,.search-open .mobile-bottom{z-index:50}.site-footer{padding-bottom:28px}.hero-copy{padding-top:18px}}
@media(max-width:380px){.shell-inner,.content-wrap{width:min(calc(100% - 32px),var(--max))}.toolbox-button span{font-size:12px}.app-shortcut{font-size:12px}.tag-ribbon{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Distinct inner-page reading systems */
.page-launch .prose{border-left:5px solid var(--steel)}
.page-glance .prose{display:grid;grid-template-columns:64px 1fr;column-gap:18px;align-items:start}.page-glance .prose .card-tag{grid-row:1/3;font-size:20px;justify-content:center;background:var(--steel);color:#fff}.page-glance .prose h2,.page-glance .prose p{grid-column:2}
.page-cast .prose{border-top:4px solid var(--bright)}
.page-screen>.section:nth-of-type(2) .split{grid-template-columns:1fr}.page-screen>.section:nth-of-type(2) .media-slot{height:min(300px,46vw)}
.page-clip .prose,.page-serial .prose,.page-explore .prose{box-shadow:none;border-style:dashed}
.page-craft .prose{border-radius:8px;border-left:7px solid var(--steel);box-shadow:none}
.page-theme .prose{background:linear-gradient(145deg,#fff,#E4F2FA)}.page-theme .section:nth-of-type(even) .prose{background:linear-gradient(145deg,#F7FFFE,#DDF2ED)}
.page-shelf .prose{border-left:6px solid var(--bright);box-shadow:inset 0 -1px 0 rgba(30,111,184,.08)}
.page-chart .prose{position:relative;padding-left:92px}.page-chart .prose .card-tag{position:absolute;left:22px;top:24px;font-size:22px;background:var(--steel);color:#fff}
.page-plan .prose{border-left:3px solid var(--ice);position:relative}.page-plan .prose:before{content:"";position:absolute;width:14px;height:14px;border-radius:50%;background:var(--steel);left:-9px;top:28px;border:3px solid var(--bg)}
.page-lab .prose{box-shadow:none;border-top:5px solid var(--mint)}
.page-note .prose{max-width:980px;margin:0 auto}.page-note .prose p{font-size:16.5px;line-height:1.95}
.page-app>.section:nth-of-type(2) .split{grid-template-columns:.8fr 1.2fr}.page-app>.section:nth-of-type(2) .media-slot{height:420px}
.page-rights .prose,.page-grade .prose,.page-privacy .prose{box-shadow:none;border-left:4px solid var(--steel)}
.page-about .prose{border-color:var(--border-strong)}
@media(max-width:680px){.page-glance .prose{grid-template-columns:48px 1fr}.page-chart .prose{padding-left:72px}.page-app>.section:nth-of-type(2) .split{grid-template-columns:1fr}.page-app>.section:nth-of-type(2) .media-slot{height:320px}}