:root{--ink:#283540;--muted:#74818a;--teal:#2dbba9;--teal-dark:#159989;--paper:#f7f8fa;--line:#e6e9ed}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.shell{width:min(1440px,calc(100% - 80px))}
.site-topline{height:34px;background:#f5f8f8;border-bottom:1px solid #e9f0f0;color:#81939b;font-size:11px}
.site-topline .shell{height:100%;display:flex;align-items:center;justify-content:space-between}
.site-header{height:78px;border:0;background:#fff;position:relative;z-index:2}
.site-header:before{content:"";position:absolute;top:0;bottom:0;left:50%;width:100vw;transform:translateX(-50%);background:#fff;z-index:-1;border-bottom:1px solid #e8ecee}
.brand{font-size:22px;letter-spacing:-.04em;gap:9px;color:#223c43}
.brand-icon{width:38px;height:38px;background:#28bba9;color:#fff;border-radius:9px;font-size:22px;box-shadow:none}
.brand-light{font-weight:700}
.site-header nav{gap:34px;color:#56636b;font-size:13px}
.site-header nav a:hover,.header-actions a:hover{color:var(--teal-dark);text-decoration:none}
.header-actions{gap:17px;color:#59666d}
.header-actions .signed-in{max-width:210px}
.header-cta{border:1px solid #d4e8e7;color:#239d91;background:#f5fbfa;border-radius:20px;padding:10px 18px}
.header-cta:hover{background:#e6f7f4}
.library-home{background:#f7f8fa}
.library-hero{background:#e6f6f6;border-bottom:1px solid #d9eeee}
.library-hero-inner{min-height:330px;display:grid;grid-template-columns:1fr minmax(390px,600px);align-items:center;gap:60px;padding:43px 0 46px}
.library-eyebrow,.section-kicker,.search-card-kicker{color:#24af9f;font-size:11px;font-weight:800;letter-spacing:.15em}
.library-hero h1{font-size:clamp(37px,3.4vw,54px);line-height:1.32;letter-spacing:-.045em;margin:15px 0 16px;color:#273b44}
.library-hero h1 em{font-style:normal;color:#34bfae}
.library-hero-copy>p{font-size:14px;line-height:1.9;color:#6c848a;max-width:530px;margin:0}
.hero-points{display:flex;gap:0;margin-top:30px;flex-wrap:wrap;color:#77949a;font-size:11px}
.hero-points span{padding:0 17px;border-right:1px solid #bddcda}
.hero-points span:first-child{padding-left:0}.hero-points span:last-child{border:0}
.library-search-card{background:#fff;border-radius:17px;padding:30px 32px 24px;box-shadow:0 12px 35px #358e8a13;border:1px solid #ebf2f2}
.library-search-card h2{font-size:24px;margin:8px 0 21px;letter-spacing:-.04em}
.library-search{height:56px;display:flex;align-items:center;background:#f8fbfb;border:1px solid #dfe9ea;border-radius:9px;padding:5px 6px 5px 15px}
.library-search>span{font-size:31px;color:#a2b0b7;line-height:1;margin-right:8px}
.library-search input{flex:1;min-width:0;height:100%;border:0;outline:0;background:transparent;color:#283a43;font-size:14px}
.library-search>a{height:43px;min-width:79px;display:grid;place-items:center;background:#2dbba9;color:#fff;border-radius:6px;font-size:13px;font-weight:700}
.library-search>a:hover{background:#159989}
.library-search-card>p{margin:12px 0 15px;font-size:11px;color:#a0aeb3}
.search-shortcuts{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:11px;color:#829197}
.search-shortcuts a,.shortcut-muted{padding:5px 10px;background:#edf7f7;border-radius:20px;color:#599993}
.search-shortcuts a:hover{background:#d8efed}
.library-catalog{padding:56px 0 75px}
.catalog-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:23px}
.catalog-heading h2{font-size:29px;letter-spacing:-.05em;margin:6px 0 7px}
.catalog-heading p{font-size:12px;color:#909da4;margin:0}
.catalog-count{color:#98a4aa;font-size:12px}.catalog-count strong{color:#30bba8;font-size:17px;margin:0 3px}
.category-rail{display:flex;gap:8px;overflow:auto;padding:2px 0 17px;margin-bottom:7px;scrollbar-color:#ccd4d8 transparent;scrollbar-width:thin}
.category-rail .filter{white-space:nowrap;background:#fff;color:#71808a;border:1px solid #e0e7e9;border-radius:20px;padding:9px 17px;font-size:12px}
.category-rail .filter.active,.category-rail .filter:hover{background:#31bfae;color:#fff;border-color:#31bfae}
.resource-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.resource-card{display:block;color:inherit;text-decoration:none;background:#fff;border:1px solid #edf0f1;border-radius:11px;overflow:hidden;min-width:0;transition:transform .18s,box-shadow .18s}
.resource-card:hover{transform:translateY(-3px);box-shadow:0 14px 28px #243d4812}
.resource-cover{height:200px;overflow:hidden;position:relative;background:#edf1f3}
.resource-cover.has-cover img{width:100%;height:100%;display:block;object-fit:cover}
.resource-cover-fallback{display:grid;place-items:center;background:#f2e5dc}
.resource-cover-fallback.cover-tone-1{background:#f4e6df}.resource-cover-fallback.cover-tone-2{background:#e4efed}.resource-cover-fallback.cover-tone-3{background:#ecedf3}
.paper-cover{width:78%;height:92%;background:#fffdf8;border:1px solid #e8d5c7;box-shadow:8px 10px 0 #d9c9bf;display:flex;flex-direction:column;justify-content:space-between;padding:14px 17px;transform:rotate(-2deg);position:relative}
.paper-cover:before{content:"";position:absolute;left:-1px;right:-1px;top:28px;border-top:1px solid #f0d8d2}
.paper-cover:after{content:"";position:absolute;left:0;right:0;bottom:0;height:12px;background:#cf5148}
.paper-cover-top{font-size:9px;letter-spacing:.06em;color:#a69185;z-index:1}
.paper-cover strong{font-size:clamp(32px,3vw,52px);font-weight:800;line-height:1.05;letter-spacing:.05em;color:#c9473e;text-align:center;text-shadow:2px 2px 0 #f1dfdc}
.paper-cover-bottom{font-size:11px;color:#9b867b;padding-bottom:4px}
.cover-tone-2 .paper-cover{border-color:#bfd9d3;box-shadow:8px 10px 0 #bbd8d2}.cover-tone-2 .paper-cover strong{color:#318e86;text-shadow:2px 2px 0 #dcf0ed}.cover-tone-2 .paper-cover:after{background:#3a9b91}
.cover-tone-3 .paper-cover{border-color:#d3d7e7;box-shadow:8px 10px 0 #c5cadb}.cover-tone-3 .paper-cover strong{color:#5d6f9d;text-shadow:2px 2px 0 #e6e9f1}.cover-tone-3 .paper-cover:after{background:#7c8bb2}
.resource-info{padding:15px 16px 14px}
.resource-category{font-size:10px;color:#2aae9f;font-weight:700;margin-bottom:7px}
.resource-card h3{font-size:15px;font-weight:700;line-height:1.45;letter-spacing:0;margin:0 0 7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.resource-card p{font-size:11px;color:#9aa5aa;line-height:1.5;margin:0 0 12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.resource-bottom{display:flex;justify-content:space-between;align-items:end;border-top:1px solid #f0f2f3;padding-top:11px}
.resource-bottom strong{color:#27bba7;font-size:19px;letter-spacing:-.04em}.resource-bottom small{font-size:13px;margin-right:2px}
.resource-bottom span{font-size:10px;color:#a0aab0;max-width:50%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.library-empty{background:#fff;border:1px dashed #dce6e6;border-radius:10px;text-align:center;padding:65px 20px;color:#85959a}
.library-empty[hidden]{display:none}.library-empty strong{font-size:19px;color:#526871}.library-empty p{font-size:12px;margin:10px 0 17px}.library-empty a{color:#2ba998;font-weight:700;font-size:12px}
.library-how{background:#fff;border-top:1px solid #e9eef0;padding:48px 0 60px}
.how-heading h2{font-size:27px;margin:8px 0 25px;letter-spacing:-.04em}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.how-grid>div{border:1px solid #e9eef0;border-radius:9px;padding:22px 25px}.how-grid b{color:#2bb6a5;font-size:13px;margin-right:20px}.how-grid strong{font-size:15px}.how-grid p{font-size:12px;color:#8d9ba1;line-height:1.7;margin:10px 0 0}
.content{background:#f7f8fa}.content h1,.content h2{color:#283b43}
.panel,.table-wrap{border-color:#e7ecee;box-shadow:0 3px 12px #243d4808}
.button-dark{background:#2bbbaa;color:#fff}.button-dark:hover{background:#159989}.button-dark span{color:#fff}
.pack-cover.resource-cover{height:520px;display:grid;place-items:center;border-radius:12px;overflow:hidden}.pack-cover .paper-cover{width:72%;height:88%;padding:25px 30px}.pack-cover .paper-cover strong{font-size:clamp(58px,5vw,90px)}
.pack-price{color:#27b7a4}.flash{background:#e4f7f2;border-color:#bde8df;color:#246c64}
.delivery-choice{border:1px solid #e5ebec;border-radius:8px;padding:16px 18px;margin:26px 0 8px}.delivery-choice legend{font-weight:700;font-size:13px;padding:0 7px}.delivery-choice label{display:inline-flex;align-items:center;gap:6px;margin:7px 24px 4px 0}.delivery-netdisk{padding:2px 0 12px}.delivery-netdisk[hidden],[data-delivery="zip"][hidden]{display:none}.netdisk-delivery{display:grid;gap:9px;margin-top:20px;overflow-wrap:anywhere}.netdisk-delivery strong{font-size:13px}.netdisk-delivery a{color:#159989;text-decoration:underline}.netdisk-delivery code{font-size:18px;background:#f0f8f7;padding:10px 13px;width:max-content;border-radius:5px}.netdisk-delivery p{color:#85939a;font-size:12px}
.footer{background:#eef3f3}.footer-main{padding:37px 0}.footer-bottom{border-color:#dce6e6}
.product[hidden]{display:none!important}
@media(max-width:1100px){.resource-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.library-hero-inner{gap:30px;grid-template-columns:1fr 1fr}}
@media(max-width:760px){.shell{width:min(100% - 32px,640px)}.site-topline .shell span:last-child{display:none}.site-header{height:70px}.site-header nav{display:none}.library-hero-inner{grid-template-columns:1fr;min-height:0;padding:42px 0}.library-hero h1{font-size:42px}.library-search-card{padding:22px}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.resource-cover{height:190px}.how-grid{grid-template-columns:1fr}.pack-cover.resource-cover{height:390px}}
@media(max-width:490px){.site-topline{height:27px}.site-header .brand{font-size:18px}.site-header .brand-icon{width:32px;height:32px;font-size:18px}.header-actions{gap:8px}.header-actions .signed-in{display:none}.library-hero h1{font-size:36px}.library-hero-copy>p{font-size:12px}.hero-points{font-size:10px}.hero-points span{padding:0 9px}.library-search-card h2{font-size:20px}.library-catalog{padding-top:38px}.catalog-heading h2{font-size:25px}.catalog-count{display:none}.resource-grid{gap:9px}.resource-cover{height:155px}.paper-cover{width:84%;padding:12px}.paper-cover strong{font-size:30px}.resource-info{padding:10px}.resource-card h3{font-size:13px}.resource-card p{display:none}.resource-bottom{margin-top:10px}.resource-bottom strong{font-size:16px}.resource-bottom span{font-size:9px}.pack-cover.resource-cover{height:310px}}
.site-topline{display:none}
.site-header{height:68px}
.library-hero-inner{min-height:220px;grid-template-columns:minmax(0,1fr) minmax(350px,590px);gap:34px;padding:25px 0}
.library-hero h1{font-size:clamp(30px,3vw,43px);line-height:1.25;margin:0 0 12px;letter-spacing:-.04em}
.library-hero-copy>p{font-size:13px;line-height:1.6}
.library-search-card{background:transparent;border:0;box-shadow:none;border-radius:0;padding:0}
.library-search{height:68px;background:#fff;border-color:#e8f1f1;border-radius:14px;box-shadow:0 7px 25px #408e8b0d}
.library-search>a{height:52px;min-width:91px;border-radius:10px}
.search-shortcuts{margin-top:13px;color:#779198}
.search-shortcuts a{background:#f4fbfb}
.library-catalog{padding:33px 0 65px}
@media(max-width:760px){.library-hero-inner{grid-template-columns:1fr;gap:24px;min-height:0;padding:31px 0}.library-hero h1{font-size:35px}.library-search{height:60px}.library-search>a{height:46px}.library-catalog{padding-top:29px}}
@media(max-width:490px){.library-hero h1{font-size:30px}.library-hero-copy>p{font-size:12px}.search-shortcuts{font-size:10px}}
@media(max-width:760px){
  .site-header{height:106px;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:64px 42px;align-items:center}
  .site-header .brand{grid-column:1;grid-row:1}
  .site-header .header-actions{grid-column:2;grid-row:1}
  .site-header nav{display:flex;grid-column:1/-1;grid-row:2;align-self:stretch;align-items:center;gap:25px;overflow-x:auto;white-space:nowrap;border-top:1px solid #edf1f2;color:#657982;font-size:12px;scrollbar-width:none}
  .site-header nav::-webkit-scrollbar{display:none}
  .library-hero-inner{padding:24px 0 26px;gap:21px}
  .library-hero h1{margin-bottom:7px}
  .library-search{height:55px;border-radius:10px;padding-left:11px}
  .library-search input{font-size:13px}
  .library-search>a{height:43px;min-width:68px;border-radius:7px}
  .library-catalog{padding-top:24px}
  .catalog-heading{margin-bottom:17px}
  .category-rail{margin-bottom:3px;padding-bottom:13px}
}
@media(max-width:490px){
  .shell{width:calc(100% - 28px)}
  .site-header .brand{font-size:17px}
  .site-header .brand-icon{width:31px;height:31px;font-size:17px}
  .header-cta{padding:8px 11px;font-size:11px}
  .site-header nav{gap:23px}
  .library-hero h1{font-size:27px}
  .library-hero-copy>p{font-size:11px}
  .search-shortcuts{margin-top:10px}
  .catalog-heading h2{font-size:23px}
  .category-rail .filter{padding:8px 13px;font-size:11px}
  .resource-grid{gap:9px}
  .resource-cover{height:156px}
  .resource-info{padding:10px 10px 12px}
  .resource-category{font-size:9px;margin-bottom:5px}
  .resource-card h3{font-size:12px;line-height:1.45;min-height:35px;white-space:normal;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
  .resource-bottom{margin-top:7px}
}
.mobile-feature,.mobile-shortcuts,.mobile-catalog-tabs,.mobile-delivery{display:none}
@media(max-width:760px){
  body,.library-home{background:#fff}
  .library-hero{background:#fff;border:0}
  .library-hero-inner{display:flex;flex-direction:column;gap:11px;padding:0 0 9px}
  .library-search-card{order:-1;align-self:stretch;margin:0 -16px;background:#62cec3;padding:15px 16px}
  .library-search{background:#fff;height:48px;border:0;border-radius:9px;box-shadow:0 3px 10px #147e7420;padding:0 10px 0 13px}
  .library-search>span{order:2;margin:0 3px 0 5px;font-size:29px;color:#398eaa}
  .library-search input{order:1;font-size:14px}
  .library-search>a,.search-shortcuts{display:none}
  .library-hero-copy>h1,.library-hero-copy>p{display:none}
  .mobile-feature{display:block;position:relative;overflow:hidden;width:100%;aspect-ratio:2.55;min-height:125px;border-radius:10px;background:linear-gradient(115deg,#991c19 0%,#c93725 57%,#ec7e3d 100%);color:#fff;box-shadow:0 6px 15px #7d342020}
  .mobile-feature img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.63}
  .mobile-feature:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#5f181bdc 0%,#5f181b64 62%,#5f181b12 100%)}
  .mobile-feature-content{position:relative;z-index:1;height:100%;width:76%;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:15px 18px}
  .mobile-feature-content small{font-size:10px;font-weight:700;letter-spacing:.07em;color:#ffe5b8}
  .mobile-feature-content strong{font-size:clamp(19px,5.8vw,31px);line-height:1.2;letter-spacing:-.03em;max-height:2.4em;overflow:hidden;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;margin:7px 0}
  .mobile-feature-content>span{font-size:10px;font-weight:700;background:#ffdc8e;color:#88311c;padding:3px 8px;border-radius:3px}
  .mobile-shortcuts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding:17px 0 16px;background:#fff}
  .mobile-shortcuts a{min-width:0;display:flex;align-items:center;flex-direction:column;gap:7px;font-size:11px;color:#273b43;text-align:center;white-space:nowrap;overflow:hidden}
  .mobile-shortcuts a>span:last-child{width:100%;overflow:hidden;text-overflow:ellipsis}
  .shortcut-icon{width:43px;height:43px;border-radius:11px;background:#e4f6f5;color:#2caaa0;display:grid;place-items:center;font-size:28px;line-height:1;font-weight:700}
  .shortcut-icon-0{background:#e7f5e9;color:#4ab872}.shortcut-icon-1{background:#e6f8ef;color:#56c29c}.shortcut-icon-2{background:#edf6fb;color:#55a9c3}
  .mobile-shortcuts a.active .shortcut-icon{box-shadow:0 0 0 2px #51c7bc inset}
  .library-catalog{padding:10px 0 45px}
  .mobile-catalog-tabs{display:flex;align-items:center;gap:24px;overflow-x:auto;white-space:nowrap;margin:0 0 12px;border-bottom:1px solid #edf0f1}
  .mobile-catalog-tabs button{padding:12px 0 10px;border:0;border-bottom:2px solid transparent;background:transparent;color:#7c898d;font-size:14px;cursor:pointer}
  .mobile-catalog-tabs button.active{border-color:#43c2b5;color:#34b7aa;font-weight:800}
  .catalog-heading,.category-rail{display:none}
  .resource-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
  .resource-card{border:1px solid #eef1f2;border-radius:5px;box-shadow:0 1px 4px #263d4809}
  .resource-cover{height:auto;aspect-ratio:1.57;border-radius:0}
  .resource-info{padding:8px 8px 10px}
  .resource-category,.resource-card p{display:none}
  .resource-card h3{font-size:13px;font-weight:500;line-height:1.45;min-height:2.9em;white-space:normal;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;margin:0 0 6px}
  .resource-bottom{border:0;margin:0;padding:0;align-items:center;gap:4px}
  .resource-bottom strong{color:#e27932;font-size:16px;font-weight:700;white-space:nowrap}
  .resource-bottom strong small{font-size:12px}
  .resource-bottom .format-label{display:none}
  .resource-bottom .mobile-delivery{display:inline;color:#4bbcaf;font-size:10px;max-width:none;white-space:nowrap}
  .paper-cover{width:83%;height:88%;padding:8px 11px}
  .paper-cover strong{font-size:clamp(21px,6vw,29px)}
  .paper-cover-top,.paper-cover-bottom{font-size:7px}
}
@media(max-width:490px){
  .library-search-card{margin:0 -14px;padding:12px 14px}
  .mobile-feature{min-height:117px}
  .mobile-shortcuts{padding-top:15px}
  .resource-card h3{font-size:12px}
  .resource-bottom strong{font-size:15px}
  .resource-bottom .mobile-delivery{font-size:9px}
}
@media(max-width:760px){
  .content.pack-layout{padding-top:14px;padding-bottom:42px;gap:18px}
  .pack-cover.resource-cover{height:auto;aspect-ratio:1.38;border-radius:7px}
  .pack-info h1{font-size:25px;line-height:1.35;margin:6px 0 10px}
  .pack-summary{font-size:13px;line-height:1.65}
  .pack-price{color:#e27932;font-size:30px;margin:14px 0 17px}
  .pack-info dl{padding:14px 0;grid-template-columns:80px 1fr;font-size:12px}
  .pack-info h2{font-size:16px;margin-top:23px}
  .purchase-form{margin-top:23px}
  .purchase-form .button{justify-content:center;border-radius:7px}
  .auth .panel,.order-page .panel{border-radius:9px}
}