:root{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;--green:#08a06d;--blue:#5676d6;--ink:#174e68;--muted:#718a95;--line:#d3e6ea}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);background:linear-gradient(135deg,#ebfbfd,#e9faf7 55%,#f6fffd)}button,input,textarea{font:inherit}button,a{cursor:pointer}main{width:min(1760px,calc(100% - 44px));margin:auto;padding:24px 0 52px}header{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:18px;padding:18px 20px;border:1px solid var(--line);border-radius:22px;background:#ffffffd9;box-shadow:0 10px 28px #117e9a12}h1{margin:0;font-size:clamp(28px,2.7vw,44px)}.brand-subtitle{margin:7px 0 0;color:var(--muted);font-size:14px}.back-link{display:inline-block;margin-bottom:10px;color:#426578;text-decoration:none;font-weight:800}.nav,#guest-actions,.account-chip{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.nav button,.pill{border:1px solid #c9e2e8;border-radius:12px;padding:10px 15px;background:#fff;color:#28556e;font-weight:800}.nav .primary{background:var(--green);border-color:var(--green);color:#fff}.library-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px;padding:14px 18px;border:1px solid var(--line);border-radius:18px;background:#ffffffa8}.library-toolbar strong{font-size:19px}.library-toolbar span{display:block;margin-top:3px;color:var(--muted);font-size:14px}.count,.series-count{padding:8px 14px;border-radius:999px;background:#effbfc;color:#0f8fc2;font-weight:850;white-space:nowrap}.series-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.series-card,.book{position:relative;overflow:hidden;border:2px solid #cde5eb;border-radius:28px;background:#fff;box-shadow:0 15px 36px #1c5b701e;transition:.18s}.series-card:hover,.book:hover{transform:translateY(-5px);box-shadow:0 22px 46px #1c5b702b}.series-cover{display:block;width:100%;height:min(42vw,460px);object-fit:cover;background:#eef6f8}.series-card.mask-old-badge:before{content:"";position:absolute;top:0;right:0;z-index:5;width:168px;height:96px;background:linear-gradient(135deg,#dff7fb,#d1eef5);border-radius:0 26px 0 48px}.series-status{position:absolute;top:15px;right:15px;z-index:7;display:inline-flex;align-items:center;justify-content:center;min-width:112px;min-height:48px;padding:9px 18px;border-radius:999px;border:3px solid #fff;box-shadow:0 7px 18px #19435333;font-size:16px;font-weight:900;color:#fff}.series-status.partial{background:#526d7a}.series-status.full{background:#20a875}.series-content{padding:22px}.series-title-row{display:flex;justify-content:space-between;align-items:center;gap:12px}.series-card h2{margin:0;font-size:clamp(25px,2.3vw,38px)}.series-card p{color:var(--muted);line-height:1.65}.series-enter{display:flex;align-items:center;justify-content:center;min-height:54px;margin-top:16px;border-radius:14px;background:var(--green);color:#fff;text-decoration:none;font-weight:900;font-size:18px}.series-card.think .series-enter{background:var(--blue)}.books{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.cover{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#e8f7fa}.book.mask-old-badge:before{content:"";position:absolute;top:0;right:0;z-index:5;width:168px;height:96px;background:linear-gradient(135deg,#dff7fb,#d1eef5);border-radius:0 26px 0 48px}.book-status{position:absolute;top:15px;right:15px;z-index:7;display:inline-flex;align-items:center;justify-content:center;min-width:112px;min-height:48px;padding:9px 18px;border-radius:999px;border:3px solid #fff;box-shadow:0 7px 18px #19435333;font-size:16px;font-weight:900}.book-status.locked{background:#526d7a;color:#fff}.book-status.unlocked{background:#20a875;color:#fff}.book h2{margin:0;padding:20px 22px 9px;min-height:84px;font-size:clamp(18px,1.45vw,26px)}.book-access-detail{min-height:22px;margin:0;padding:0 22px;color:#688693;font-size:14px;font-weight:700}.book-access-detail:empty{display:none}.actions{display:flex;gap:12px;padding:12px 22px 23px}.actions button{flex:1;min-height:52px;border:2px solid #d1dce7;border-radius:13px;background:#fff;color:#28556e;font-weight:850}.actions .book-open{background:var(--green);border-color:var(--green);color:#fff}.book:not(.is-unlocked) .book-open{background:#28556e;border-color:#28556e}.think-page .actions .book-open{background:var(--blue);border-color:var(--blue)}.plan-strip{margin-top:26px;padding:20px 22px;border-radius:22px;background:#163f54;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:18px}.plan-strip p{margin:5px 0 0;color:#c7dfe8}.plan-strip button{border:0;border-radius:12px;padding:12px 18px;background:#fff;color:#163f54;font-weight:850}.modal{position:fixed;inset:0;z-index:100;display:none;place-items:center;padding:18px;background:#0f2c3a85;backdrop-filter:blur(8px)}.modal.open{display:grid}.dialog{width:min(560px,100%);max-height:90vh;overflow:auto;border-radius:24px;padding:25px;background:#fff;box-shadow:0 25px 80px #0004}.dialog.wide{width:min(790px,100%)}.modal-head{display:flex;justify-content:space-between;gap:14px;margin-bottom:18px}.modal-head h2{margin:0}.modal-head p{margin:6px 0 0;color:var(--muted)}.modal-close{width:38px;height:38px;border:0;border-radius:50%;background:#edf4f5;font-size:22px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;background:#edf5f5;border-radius:12px;margin-bottom:16px}.auth-tab{border:0;border-radius:9px;padding:10px;background:transparent;font-weight:800}.auth-tab.active{background:#fff;color:var(--green)}.auth-panel{display:none}.auth-panel.active{display:block}.field{display:grid;gap:7px;margin:13px 0}.field label{font-weight:800}.field input,.feedback-dialog textarea{width:100%;border:1px solid #cbdde3;border-radius:12px;padding:12px 14px;outline:none}.feedback-dialog textarea{min-height:150px;resize:vertical}.submit{width:100%;border:0;border-radius:12px;padding:13px 16px;background:var(--green);color:#fff;font-weight:850;margin-top:10px}.purchase-group{margin:14px 0}.purchase-group h3{margin:0 0 8px}.purchase-books{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.purchase-book{border:2px solid #d6e5ea;border-radius:13px;padding:11px 5px;background:#fff;color:#315d70;font-weight:850}.purchase-book.selected{border-color:var(--green);background:#e8f8f2;color:#087657}.radio-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.radio-card{display:flex;gap:8px;border:1px solid #d2e1e6;border-radius:12px;padding:11px}.purchase-summary{display:flex;justify-content:space-between;margin:14px 0;padding:14px;border-radius:14px;background:#eff9f6}.purchase-summary strong{color:var(--green);font-size:24px}.payment-box{margin-top:16px;padding:16px;text-align:center;border-radius:15px;background:#f2f8f9}.payment-box img{width:230px;max-width:80%}.profile-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}.stat{padding:13px;border-radius:13px;background:#eef8f6;text-align:center}.stat strong{display:block;font-size:24px}.profile-books{display:grid;gap:8px}.profile-book{display:flex;justify-content:space-between;padding:11px;border:1px solid #e0e9ec;border-radius:11px}.profile-book span{display:grid}.profile-book small{color:var(--muted)}.referral-box{margin-top:17px;padding:15px;border-radius:15px;background:#f5f8fa}.referral-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.referral-stats div{text-align:center;padding:9px;background:#fff;border-radius:9px}.copy-row{display:flex;gap:7px;margin:8px 0}.copy-row input{flex:1;min-width:0;padding:9px}.copy-row button,.profile-actions button{border:0;border-radius:9px;padding:9px 13px;background:#28556e;color:#fff;font-weight:800}.profile-actions{display:flex;gap:9px;margin-top:15px}.profile-actions button{flex:1}.profile-actions .buy{background:var(--green)}.feedback-fab{position:fixed;right:22px;bottom:22px;z-index:90;width:54px;height:54px;display:grid;place-items:center;border:1px solid #fff;border-radius:50%;background:#fff;color:#087c5e;box-shadow:0 12px 30px #19435333}.feedback-fab svg{width:25px}.toast{position:fixed;left:50%;bottom:28px;z-index:300;transform:translate(-50%,18px);opacity:0;padding:12px 18px;border-radius:999px;background:#28556e;color:#fff;font-weight:800;transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}.toast.success{background:#087c5e}.toast.error{background:#b74450}[hidden]{display:none!important}@media(max-width:1100px){.books{grid-template-columns:repeat(2,1fr)}.series-cover{height:360px}}@media(max-width:760px){main{width:min(100% - 24px,700px)}header{flex-direction:column;align-items:stretch}.nav{justify-content:flex-start}.series-grid{grid-template-columns:1fr}.series-cover{height:auto;aspect-ratio:4/3}.purchase-books{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.books{grid-template-columns:1fr}.radio-grid,.profile-stats{grid-template-columns:1fr}.plan-strip{flex-direction:column;align-items:flex-start}.plan-strip button{width:100%}}.nav .referral-nav{background:#3f7edb;border-color:#3f7edb;color:#fff;box-shadow:0 5px 14px #3f7edb2e}.nav .referral-nav:hover{background:#326fc9;border-color:#326fc9}.referral-dialog{width:min(620px,100%)}.referral-dialog .referral-stats{margin:4px 0 14px}.referral-dialog .copy-row button{background:#28556e;color:#fff;border:0;border-radius:9px;padding:9px 13px;font-weight:800}.download-note{margin:4px 0 16px;padding:16px 17px;border:1px solid #b9d8e4;border-radius:15px;background:#f0f9fc;line-height:1.65}.download-note strong{display:block;font-size:18px;color:#174e68}.download-note p{margin:8px 0 0;color:#5e7d8b}.download-note b{color:#d25b36;font-size:20px}.actions .book-buy{font-size:13px;white-space:nowrap;line-height:1.15;padding-left:7px;padding-right:7px;letter-spacing:-.2px}
.powerup-page .actions .book-buy{font-size:11px!important;white-space:nowrap!important;word-break:keep-all!important;overflow-wrap:normal!important;line-height:1!important;padding-left:4px!important;padding-right:4px!important;letter-spacing:-.45px!important}

/* Payment choice cards: keep radios compact and labels readable. */
.radio-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.field .radio-card{position:relative;display:flex;align-items:center;gap:11px;min-width:0;min-height:64px;margin:0;padding:14px 16px;border:2px solid #d5e4e9;border-radius:14px;background:#fff;color:#28556e;font-size:16px;font-weight:800;line-height:1.4;word-break:normal;overflow-wrap:break-word;cursor:pointer;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease,transform .16s ease}
.field .radio-card:hover{border-color:#9bcfc3;background:#f8fcfb;transform:translateY(-1px)}
.field .radio-card:has(input[type="radio"]:checked){border-color:var(--green);background:#edf9f5;box-shadow:0 0 0 3px #08a06d14}
.field .radio-card input[type="radio"]{appearance:auto!important;-webkit-appearance:radio!important;width:20px!important;min-width:20px!important;max-width:20px!important;height:20px!important;min-height:20px!important;margin:0!important;padding:0!important;border:0!important;border-radius:50%!important;box-shadow:none!important;flex:0 0 20px!important;accent-color:var(--green)}
#purchase-modal .dialog.wide{width:min(860px,calc(100vw - 36px))}
#purchase-modal .field,#download-modal .field{margin:17px 0}
#purchase-modal .field>label,#download-modal .field>label{display:block;margin-bottom:9px;font-size:17px;color:#174e68}
#purchase-modal .purchase-group{margin:15px 0}
#purchase-modal .purchase-books{gap:10px}
#purchase-modal .purchase-book{min-height:48px;padding:10px 8px}
#purchase-modal .purchase-summary{align-items:center;margin:16px 0 10px;padding:15px 17px}
#purchase-modal .submit,#download-modal .submit{min-height:48px;font-size:16px}
#download-modal .dialog{width:min(610px,calc(100vw - 36px))}
#download-modal .download-note{margin-bottom:18px}
#download-modal .radio-card{min-height:62px}
@media(max-width:620px){
  .radio-grid{grid-template-columns:1fr}
  .field .radio-card{min-height:56px;padding:12px 14px;font-size:15px}
  #purchase-modal .dialog.wide,#download-modal .dialog{width:100%}
}

/* Account Hub — deliberately distinct from the reference UI: dark rail, cyan/teal accents, asymmetrical cards. */
#account-center-modal{position:fixed;inset:0;z-index:260;display:none;place-items:center;padding:22px;background:rgba(9,24,38,.62);backdrop-filter:blur(14px)}
#account-center-modal.open{display:grid}
.ac-shell{width:min(1280px,96vw);height:min(860px,92vh);display:grid;grid-template-columns:270px minmax(0,1fr);overflow:hidden;border:1px solid rgba(255,255,255,.55);border-radius:30px;background:#f6fafb;box-shadow:0 40px 110px rgba(5,25,42,.38)}
.ac-side{position:relative;display:flex;flex-direction:column;gap:18px;padding:26px 20px;background:linear-gradient(160deg,#102f45 0%,#174d5b 52%,#1b6b6f 100%);color:#fff}
.ac-side:after{content:"";position:absolute;width:180px;height:180px;right:-80px;bottom:70px;border-radius:50%;background:rgba(111,227,215,.10);filter:blur(2px)}
.ac-logo-row{display:flex;align-items:center;gap:12px}
.ac-logo{width:46px;height:46px;display:grid;place-items:center;border-radius:15px;background:linear-gradient(135deg,#62dfcf,#5a8ff1);font-weight:950;font-size:20px;box-shadow:0 12px 28px rgba(47,184,182,.28)}
.ac-logo-row strong{font-size:20px}.ac-logo-row small{display:block;margin-top:3px;color:#b8d8de;font-size:12px}
.ac-identity{padding:18px;border:1px solid rgba(255,255,255,.14);border-radius:20px;background:rgba(255,255,255,.09)}
.ac-avatar{width:54px;height:54px;display:grid;place-items:center;margin-bottom:12px;border-radius:18px;background:#f0fffd;color:#155767;font-size:23px;font-weight:950}
.ac-identity b{display:block;font-size:18px}.ac-identity small{display:block;margin-top:4px;color:#b9d7dc;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ac-state{display:inline-flex!important;width:max-content;margin-top:10px!important;padding:5px 9px;border-radius:999px;background:rgba(100,232,181,.16);color:#8ff0c4!important;font-weight:800}
.ac-nav{display:grid;gap:8px}
.ac-nav button{display:flex;align-items:center;gap:10px;width:100%;min-height:48px;padding:0 14px;border:0;border-radius:14px;background:transparent;color:#c8e0e4;font-weight:850;text-align:left}
.ac-nav button:hover{background:rgba(255,255,255,.08);color:#fff}
.ac-nav button.active{background:#fff;color:#174d5b;box-shadow:0 12px 28px rgba(0,0,0,.14)}
.ac-nav-icon{width:26px;font-size:18px;text-align:center}
.ac-side-bottom{position:relative;z-index:1;display:grid;gap:8px;margin-top:auto}
.ac-side-bottom button{min-height:46px;border:1px solid rgba(255,255,255,.18);border-radius:14px;background:rgba(255,255,255,.08);color:#fff;font-weight:800}
.ac-side-bottom .danger{border-color:rgba(255,137,137,.35);color:#ffd6d6}
.ac-main{min-width:0;min-height:0;display:flex;flex-direction:column;overflow:hidden;background:radial-gradient(circle at 95% 0,#dff8f4 0,transparent 32%),#f7fafc}
.ac-top{position:relative;z-index:5;flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:23px 28px 18px;background:rgba(247,250,252,.94);backdrop-filter:blur(12px);border-bottom:1px solid #dfebee}
.ac-top h2{margin:0;color:#17364a;font-size:24px}.ac-top p{margin:5px 0 0;color:#7b939e;font-size:13px}
.ac-close{width:42px;height:42px;border:1px solid #d6e4e8;border-radius:14px;background:#fff;color:#607985;font-size:25px;line-height:1}
.ac-content{flex:1 1 auto;min-height:0;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y;scrollbar-gutter:stable;padding:24px 28px 34px}.ac-content::-webkit-scrollbar{width:10px}.ac-content::-webkit-scrollbar-track{background:transparent}.ac-content::-webkit-scrollbar-thumb{border:3px solid transparent;border-radius:999px;background:#bfd0d6;background-clip:padding-box}.ac-content:hover::-webkit-scrollbar-thumb{background:#8faeb8;background-clip:padding-box}
.ac-panel{display:none}.ac-panel.active{display:block}
.ac-hero{display:grid;grid-template-columns:1.4fr .75fr;gap:18px;margin-bottom:18px}
.ac-welcome{position:relative;overflow:hidden;min-height:178px;padding:25px;border-radius:24px;background:linear-gradient(135deg,#1d5366,#1b7b7d);color:#fff}
.ac-welcome:after{content:"";position:absolute;right:-55px;top:-60px;width:210px;height:210px;border-radius:50%;background:rgba(121,235,221,.15)}
.ac-eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#a9ede3;font-weight:900}
.ac-welcome h3{margin:12px 0 7px;font-size:30px}.ac-welcome p{max-width:560px;margin:0;color:#d7eeef;line-height:1.65}
.ac-hero-actions{display:flex;gap:10px;margin-top:20px}.ac-btn{min-height:42px;padding:0 15px;border:1px solid #cfe1e5;border-radius:12px;background:#fff;color:#245066;font-weight:850}.ac-btn.primary{border-color:#54d3c3;background:#54d3c3;color:#103b45}.ac-btn.ghost{border-color:rgba(255,255,255,.32);background:rgba(255,255,255,.10);color:#fff}
.ac-focus{display:grid;align-content:center;padding:22px;border:1px solid #d8e8ea;border-radius:24px;background:#fff;box-shadow:0 14px 34px rgba(20,72,86,.06)}
.ac-focus span{font-size:13px;color:#8198a2}.ac-focus strong{margin:6px 0;color:#17364a;font-size:34px}.ac-focus small{color:#6f8994;line-height:1.5}
.ac-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:18px}
.ac-stat{padding:17px 18px;border:1px solid #dce9ec;border-radius:18px;background:#fff}
.ac-stat span{display:block;color:#8298a2;font-size:12px;font-weight:800}.ac-stat strong{display:block;margin-top:7px;color:#15364a;font-size:24px}
.ac-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(270px,.8fr);gap:16px}
.ac-card{padding:20px;border:1px solid #dbe8eb;border-radius:21px;background:#fff;box-shadow:0 12px 30px rgba(21,77,90,.045)}
.ac-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.ac-card-head h3{margin:0;color:#193a4e;font-size:18px}.ac-card-head small{color:#8499a3}
.ac-mini-list{display:grid;gap:9px}.ac-mini{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 12px;border-radius:14px;background:#f6fafb}.ac-mini b{display:block;color:#27495b}.ac-mini small{display:block;margin-top:3px;color:#8aa0aa}.ac-mini strong{white-space:nowrap;color:#1a7776}
.ac-quick{display:grid;gap:10px}.ac-quick-row{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px dashed #dce8eb}.ac-quick-row:last-child{border-bottom:0}.ac-quick-row span{color:#80959f}.ac-quick-row b{color:#28495a;text-align:right}.ac-copy-mini{border:1px solid #cfe4e3;border-radius:10px;padding:7px 10px;background:#eef9f6;color:#167365;font-weight:850}
.ac-section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}.ac-section-head h3{margin:0;color:#17364a;font-size:25px}.ac-section-head p{margin:5px 0 0;color:#8197a0}
.ac-license-tools{display:flex;gap:9px;flex-wrap:wrap}.ac-license-tools input{min-width:220px;padding:10px 13px;border:1px solid #d3e3e7;border-radius:12px;background:#fff;outline:none}
.ac-chips{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:14px}.ac-chip{padding:8px 12px;border:1px solid #d2e2e6;border-radius:999px;background:#fff;color:#607985;font-weight:800}.ac-chip.active{border-color:#1b7b7d;background:#e7f6f3;color:#176866}
.ac-license-list{display:grid;gap:11px}.ac-license{display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:14px;padding:14px 15px;border:1px solid #dce8eb;border-radius:17px;background:#fff}.ac-book-badge{width:54px;height:54px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(135deg,#ddf6f1,#e4efff);color:#185e69;font-size:13px;font-weight:950}.ac-license h4{margin:0;color:#244657}.ac-license p{margin:5px 0 0;color:#8499a3;font-size:13px}.ac-status{display:inline-flex;align-items:center;justify-content:center;padding:6px 9px;border-radius:999px;background:#eef3f4;color:#748992;font-size:12px;font-weight:900}.ac-status.on{background:#e5f8ef;color:#16815c}.ac-status.warn{background:#fff2dd;color:#b36f16}
.ac-device-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:16px}.ac-session-list{display:grid;gap:10px}.ac-session{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:center;padding:13px;border:1px solid #dce8eb;border-radius:16px;background:#fff}.ac-device-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;background:#eaf4f8;color:#28667f;font-size:21px}.ac-session h4{margin:0;color:#27495b}.ac-session p{margin:5px 0 0;color:#8a9ea7;font-size:12px}.ac-session-tags{display:flex;gap:5px;margin-top:7px}.ac-session-tags span{padding:4px 7px;border-radius:999px;background:#eef5f6;color:#66818d;font-size:11px;font-weight:800}.ac-session-tags .now{background:#e5f8ef;color:#14785a}.ac-session button{padding:8px 11px;border:1px solid #f2c5c5;border-radius:10px;background:#fff7f7;color:#c14e4e;font-weight:800}.ac-session button:disabled{border-color:#dce6e9;background:#f5f8f9;color:#99a9af}
.ac-desktop-box{padding:18px;border-radius:19px;background:linear-gradient(160deg,#eff8fa,#eef8f4);border:1px solid #d7e7e9}.ac-desktop-box h4{margin:0 0 10px;color:#24495a}.ac-desktop-box p{margin:7px 0;color:#78909a;font-size:13px}.ac-desktop-box strong{color:#1c5f6a}
.ac-security{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.75fr);gap:16px}.ac-security-form{padding:21px;border:1px solid #dce8eb;border-radius:21px;background:#fff}.ac-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.ac-field{display:grid;gap:7px;margin-bottom:12px}.ac-field.full{grid-column:1/-1}.ac-field label{color:#415f6e;font-size:13px;font-weight:850}.ac-field input{width:100%;padding:12px 13px;border:1px solid #d2e2e6;border-radius:12px;outline:none}.ac-code-row{display:flex;gap:8px}.ac-code-row input{flex:1;min-width:0}.ac-code-row button{white-space:nowrap}
.ac-security-note{padding:20px;border-radius:21px;background:#173e52;color:#fff}.ac-security-note h4{margin:0 0 13px}.ac-security-note p{color:#c6dbe3;line-height:1.65}.ac-meter{margin:16px 0 8px;height:8px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.14)}.ac-meter i{display:block;height:100%;border-radius:inherit;background:#66e2c4}.ac-empty{padding:34px 18px;border:1px dashed #cbdde2;border-radius:16px;text-align:center;color:#8ba0a9;background:#fbfdfd}
@media(max-width:980px){.ac-shell{grid-template-columns:220px 1fr}.ac-stats{grid-template-columns:repeat(2,1fr)}.ac-hero,.ac-grid,.ac-device-grid,.ac-security{grid-template-columns:1fr}}
@media(max-width:720px){#account-center-modal{padding:0}.ac-shell{width:100vw;height:100vh;border-radius:0;grid-template-columns:1fr;grid-template-rows:auto 1fr}.ac-side{display:block;padding:14px 14px 10px}.ac-logo-row,.ac-identity{display:none}.ac-nav{display:flex;overflow:auto}.ac-nav button{min-width:max-content;width:auto}.ac-side-bottom{position:absolute;right:14px;top:14px;margin:0}.ac-side-bottom .ac-help{display:none}.ac-side-bottom .danger{display:none}.ac-main{min-height:0}.ac-top{padding:17px 18px}.ac-content{padding:18px}.ac-stats{grid-template-columns:repeat(2,1fr)}.ac-form-grid{grid-template-columns:1fr}.ac-license{grid-template-columns:48px 1fr}.ac-license>.ac-status{grid-column:2}.ac-section-head{align-items:stretch;flex-direction:column}.ac-license-tools input{width:100%}}

/* Compact multi-series catalog */
.series-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}
.series-card{border-radius:20px}
.series-cover{height:170px}
.series-card.mask-old-badge:before{width:118px;height:68px;border-radius:0 18px 0 36px}
.series-status{top:10px;right:10px;min-width:82px;min-height:34px;padding:5px 11px;border-width:2px;font-size:12px}
.series-status.locked{background:#526d7a}
.series-content{padding:14px 15px 16px}
.series-title-row{align-items:flex-start;gap:8px}
.series-card h2{font-size:20px;line-height:1.2}
.series-card p{min-height:42px;margin:8px 0;font-size:13px;line-height:1.45}
.series-count{padding:5px 8px;font-size:11px}
.series-enter{min-height:42px;margin-top:10px;border-radius:11px;font-size:15px}
.books{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.book{border-radius:20px}
.book.mask-old-badge:before{width:110px;height:65px;border-radius:0 18px 0 34px}
.book-status{top:9px;right:9px;min-width:78px;min-height:34px;padding:5px 9px;border-width:2px;font-size:12px}
.book h2{min-height:64px;padding:13px 14px 6px;font-size:16px;line-height:1.25}
.book-access-detail{padding:0 14px;font-size:12px}
.actions{gap:7px;padding:9px 12px 14px}
.actions button{min-height:42px;padding:6px;font-size:12px}
@media(max-width:1200px){.books{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:920px){.series-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.series-cover{height:190px}.books{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:640px){.series-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.series-cover{height:140px}.series-card h2{font-size:16px}.series-card p{display:none}.series-content{padding:11px}.books{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.book h2{font-size:14px;min-height:58px}.actions{flex-direction:column}.actions button{width:100%}}


/* Customer WeChat quick contact */
.wechat-fab{position:fixed;right:88px;bottom:22px;z-index:90;height:54px;display:inline-flex;align-items:center;gap:9px;padding:0 17px 0 10px;border:1px solid rgba(255,255,255,.92);border-radius:999px;background:linear-gradient(135deg,#ff9d3a,#ff7138);color:#fff;box-shadow:0 13px 30px rgba(232,103,35,.28);font-weight:900;letter-spacing:.2px;transition:transform .16s ease,box-shadow .16s ease}.wechat-fab:hover{transform:translateY(-2px);box-shadow:0 17px 36px rgba(232,103,35,.34)}.wechat-fab:active{transform:translateY(0)}.wechat-fab .wechat-fab-icon{width:34px;height:34px;display:grid;place-items:center;flex:0 0 34px;border-radius:50%;background:rgba(255,255,255,.2);font-size:18px}.wechat-fab .wechat-fab-icon svg{width:20px;height:20px}
.wechat-dialog{width:min(430px,calc(100vw - 30px));padding:0;overflow:hidden;border-radius:28px;background:#fff;box-shadow:0 30px 95px rgba(50,38,24,.34)}.wechat-dialog .wechat-hero{position:relative;padding:24px 58px 20px 24px;background:linear-gradient(135deg,#ffad4b,#ff7138);color:#fff}.wechat-dialog .wechat-hero h2{margin:0;font-size:25px}.wechat-dialog .wechat-hero p{margin:7px 0 0;color:rgba(255,255,255,.92);line-height:1.55}.wechat-dialog .wechat-close{position:absolute;right:16px;top:16px;width:36px;height:36px;border:1px solid rgba(255,255,255,.35);border-radius:50%;background:rgba(255,255,255,.16);color:#fff;font-size:22px;line-height:1}.wechat-dialog .wechat-body{padding:21px 22px 24px;text-align:center;background:linear-gradient(180deg,#fffaf5,#fff)}.wechat-qr-wrap{display:inline-grid;place-items:center;padding:12px;border-radius:22px;background:#fff;box-shadow:0 12px 34px rgba(77,56,37,.12);border:1px solid #f5dfc8}.wechat-qr{display:block;width:min(250px,62vw);height:auto;border-radius:14px}.wechat-id-card{display:flex;align-items:center;gap:10px;margin:18px auto 0;padding:11px 12px;border:1px solid #f3d3b4;border-radius:16px;background:#fff6ec;text-align:left}.wechat-id-card .wechat-id-icon{width:38px;height:38px;display:grid;place-items:center;flex:0 0 38px;border-radius:12px;background:#ff8b36;color:#fff;font-weight:950}.wechat-id-card .wechat-id-text{min-width:0;flex:1}.wechat-id-card small{display:block;color:#a06d46;font-weight:800}.wechat-id-card input{width:100%;margin-top:2px;padding:0;border:0;outline:none;background:transparent;color:#5a351c;font-size:18px;font-weight:950}.wechat-copy{flex:0 0 auto;border:0;border-radius:11px;padding:9px 12px;background:#ff8736;color:#fff;font-weight:900}.wechat-tip{margin:13px 0 0;color:#9a7a63;font-size:13px;line-height:1.55}
@media(max-width:560px){.wechat-fab{right:84px;bottom:18px;height:50px;padding:0 13px 0 8px;font-size:13px}.feedback-fab{right:18px;bottom:18px;width:50px;height:50px}.wechat-fab .wechat-fab-icon{width:32px;height:32px;flex-basis:32px}.wechat-dialog .wechat-body{padding:18px 16px 21px}}

/* Keep support controls at the end of the page instead of over page content. */
.support-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin-top:28px;padding-top:2px}.support-actions .wechat-fab,.support-actions .feedback-fab{position:static;right:auto;bottom:auto;z-index:auto;margin:0}.support-actions .feedback-fab{display:grid;flex:0 0 54px}.support-actions .wechat-fab{flex:0 0 auto}@media(max-width:560px){.support-actions{justify-content:center;margin-top:22px}.support-actions .wechat-fab{height:50px}.support-actions .feedback-fab{width:50px;height:50px;flex-basis:50px}}

/* Referral 知点 wallet and checkout */
.zhidian-pill{background:#fff9e8!important;border-color:#f0d38b!important;color:#8d6510!important}.zhidian-use{margin:14px 0;padding:14px 16px;border:1px solid #efd59c;border-radius:15px;background:linear-gradient(135deg,#fffaf0,#fffdf8);color:#6d5317}.zhidian-use-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.zhidian-use-head label{display:flex;align-items:center;gap:8px;font-weight:900}.zhidian-use-head input{width:18px;height:18px;accent-color:#d59b20}.zhidian-use-head strong{color:#a16e08}.zhidian-use>small{display:block;margin-top:7px;color:#8b784c;line-height:1.5}.zhidian-calc{display:flex;justify-content:space-between;gap:12px;margin-top:10px;padding-top:10px;border-top:1px dashed #e7cb8d;font-size:13px}.zhidian-calc b{color:#9b6800;font-size:15px}.referral-dialog .referral-stats{grid-template-columns:repeat(4,1fr)}@media(max-width:560px){.zhidian-use-head,.zhidian-calc{align-items:flex-start;flex-direction:column}.referral-dialog .referral-stats{grid-template-columns:repeat(2,1fr)}}


/* 2026-10-17: No customer-initiated online sales on any Power Up series page.
   Existing book access, login, account center, and payment callbacks stay intact. */
#buy-nav,#profile-buy,#purchase-modal,#download-modal,
#referral-nav,#referral-modal,
.book .book-buy,.plan-strip:has(>button),.raz-game-series-heading>span,
#ac-buy,.ac-hero-actions .ac-btn.primary,
a[href*="payment/create"],a[href*="download/create"]{display:none!important}