:root {
            --ink: #0f2c52;
            --ink2: #1f4e8c;
            --muted: #667387;
            --gold: #d9a927;
            --blue: #2f66b8;
            --border: #e9ecf0;
            --surface: #fff;
            --shadow: 0 7px 26px rgba(30, 39, 56, .055)
        }

        * {
            box-sizing: border-box
        }

        body {
            margin: 0;
            background: #faf9f6;
            color: var(--ink);
            font-family: 'Poppins', 'Roboto', Arial, sans-serif;
            font-size: 14px
        }

        button,
        a {
            font: inherit
        }

        button {
            cursor: pointer
        }

        a {
            text-decoration: none;
            color: inherit
        }

        .wrap {
            width: min(1384px, calc(100% - 60px));
            margin: auto
        }

        header {
            height: 62px;
            background: #fff;
            border-bottom: 1px solid #ecebea
        }

        .header-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 9px;
            min-width: 255px
        }

        .brand-icon {
            font-size: 39px;
            line-height: 1;
            color: var(--gold)
        }

        .brand strong {
            font: 700 22px 'Poppins', 'Roboto', Georgia, serif;
            letter-spacing: -.7px
        }

        .brand small {
            display: block;
            font-size: 11px;
            margin-top: -2px
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 45px;
            font-weight: 600;
            font-size: 13px
        }

        .nav a:hover {
            color: var(--blue)
        }

        .header-right {
            display: flex;
            gap: 23px;
            align-items: center
        }

        .icon-button {
            width: 44px;
            height: 44px;
            background: white;
            border: 1px solid var(--border);
            border-radius: 50%;
            font-size: 24px;
            color: var(--ink)
        }

        .login {
            background: #0f2c52;
            color: white;
            border: 0;
            padding: 12px 25px;
            border-radius: 8px;
            font-weight: 700;
            white-space: nowrap
        }

        .breadcrumb {
            height: 52px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px
        }

        .breadcrumb strong {
            font-weight: 700
        }

        .breadcrumb .sep {
            color: #8a97a6;
            font-size: 17px
        }

        .main-panel,
        .related {
            background: #fff;
            border: 1px solid #f0f0f0;
            border-radius: 13px;
            box-shadow: var(--shadow)
        }

        .main-panel {
            padding: 24px 27px 19px
        }

        .top-content {
            display: grid;
            grid-template-columns: 315px minmax(0, 1fr);
            gap: 28px
        }

        .cover-area {
            padding: 4px 30px 6px 7px;
            border-right: 1px solid var(--border)
        }

        .book-cover {
            width: 276px;
            max-width: 100%;
            height: 355px;
            object-fit: fill;
            display: block;
            border-radius: 8px;
            box-shadow: 0 11px 23px rgba(5, 29, 48, .12)
        }

        .preview {
            position: relative;
            margin-top: -52px;
            margin-left: 17px;
            margin-right: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: calc(100% - 34px);
            height: 40px;
            border: 0;
            border-radius: 7px;
            background: rgba(255, 255, 255, .94);
            color: var(--ink);
            font-weight: 700;
            backdrop-filter: blur(8px)
        }

        .info {
            min-width: 0
        }

        .info-head {
            display: flex;
            align-items: center;
            justify-content: space-between
        }

        .pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #cde2f8;
            border-radius: 13px;
            padding: 5px 14px;
            font-weight: 700;
            color: #2f66b8
        }

        .access-share {
            display: flex;
            align-items: center;
            gap: 10px
        }

        .access {
            background: #dff1e5;
            color: #1f9a44;
            padding: 10px 14px;
            border-radius: 13px;
            font-size: 12px;
            font-weight: 700
        }

        .info h1 {
            font: 700 clamp(24px, 2.25vw, 33px)/1.19 'Poppins', 'Roboto', Georgia, serif;
            letter-spacing: -.8px;
            margin: 9px 0 12px
        }

        .author {
            font-size: 14px;
            font-weight: 600;
            margin: 0 0 25px
        }

        .meta {
            display: grid;
            grid-template-columns: 1fr 1fr;
            column-gap: 35px;
            row-gap: 17px
        }

        .meta-row {
            display: grid;
            grid-template-columns: 24px 155px minmax(0, 1fr);
            gap: 9px;
            align-items: center
        }

        .meta-row b {
            font-family: 'Poppins', 'Roboto', Georgia, serif;
            font-size: 14px
        }

        .meta-row span {
            color: #526681
        }

        .meta-icon {
            font-size: 20px;
            color: var(--ink)
        }

        .tags-title {
            margin-top: 29px;
            font: 700 14px 'Poppins', 'Roboto', Georgia, serif
        }

        .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px
        }

        .tag {
            display: inline-flex;
            background: #e8f0fa;
            padding: 10px 16px;
            border-radius: 999px;
            font-size: 13px;
            color: #1f4e8c
        }

        .horizontal-line {
            height: 1px;
            background: var(--border);
            margin-top: 39px
        }

        .summary-row {
            display: grid;
            grid-template-columns: 1.95fr 1fr;
            gap: 26px;
            margin-top: 17px;
            align-items: start
        }

        .summary h2,
        .related h2 {
            font: 700 23px 'Poppins', 'Roboto', Georgia, serif;
            margin: 0 0 13px
        }

        .summary h2 .symbol {
            margin-right: 10px
        }

        .summary p {
            margin: 0;
            color: #50647e;
            line-height: 1.53;
            font-size: 14px
        }

        .more {
            margin-top: 12px;
            border: 0;
            background: transparent;
            color: #2f66b8;
            padding: 0;
            font-weight: 700
        }

        .citation {
            border: 1px solid #eaf0f6;
            background: #f6f9fb;
            border-radius: 10px;
            padding: 19px 19px 22px;
            min-height: 145px
        }

        .citation-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px
        }

        .citation-title {
            font: 700 15px 'Poppins', 'Roboto', Georgia, serif
        }

        .citation-copy {
            border: 0;
            background: transparent;
            color: #0f2c52;
            font-size: 20px
        }

        .citation p {
            line-height: 1.55;
            color: #263d5b;
            margin: 12px 0 0 33px
        }

        .citation a {
            color: #2f66b8
        }

        .actions {
            display: grid;
            grid-template-columns: 1.1fr 1fr 1.08fr;
            gap: 15px;
            margin-top: 24px
        }

        .action {
            border-radius: 9px;
            min-height: 70px;
            padding: 14px 21px;
            display: flex;
            align-items: center;
            gap: 20px;
            text-align: left;
            border: 1px solid #1f4e8c;
            background: #fff;
            color: var(--ink)
        }

        .action .big {
            font: 700 34px 'Poppins', 'Roboto', Georgia, serif;
            flex-shrink: 0
        }

        .action .content {
            flex: 1
        }

        .action strong {
            display: block;
            font: 700 16px 'Poppins', 'Roboto', Georgia, serif;
            margin-bottom: 5px
        }

        .action small {
            font-size: 12px;
            color: #526681
        }

        .action .arrow {
            font-size: 22px
        }

        .action.primary {
            background: linear-gradient(110deg, #1d4687, #0f2c52);
            border-color: transparent;
            color: white
        }

        .action.primary small,
        .action.download small {
            color: #f0f4f7
        }

        .action.download {
            background: linear-gradient(105deg, #d9a927, #b07f1a);
            border-color: transparent;
            color: white
        }

        .action:hover,
        .related-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(3, 34, 70, .1)
        }

        .action,
        .related-item {
            transition: transform .2s, box-shadow .2s
        }

        .related {
            margin-top: 12px;
            padding: 15px 27px 18px;
            position: relative
        }

        .related-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px
        }

        .related h2 {
            margin: 0
        }

        .more-link {
            color: #2f66b8;
            font-size: 13px;
            font-weight: 700
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 13px
        }

        .related-item {
            border: 1px solid #ecedef;
            border-radius: 10px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 10px 15px;
            min-height: 140px;
            background: #fff
        }

        .related-item img {
            width: 76px;
            height: 119px;
            object-fit: fill;
            border-radius: 3px;
            flex-shrink: 0
        }

        .related-item .pill {
            font-size: 11px;
            padding: 3px 11px
        }

        .related-item h3 {
            font: 700 16px/1.2 'Poppins', 'Roboto', Georgia, serif;
            margin: 8px 0 4px
        }

        .related-item p {
            font-size: 13px;
            color: #80838b;
            margin: 4px 0
        }

        .carousel-nav {
            position: absolute;
            top: 48%;
            z-index: 2;
            display: grid;
            place-items: center;
            border-radius: 50%;
            width: 47px;
            height: 47px;
            border: 1px solid #eee;
            background: #fff;
            box-shadow: 0 5px 20px #0000000c;
            font-size: 28px
        }

        .carousel-nav.left {
            left: -24px
        }

        .carousel-nav.right {
            right: -24px
        }

        .overlay {
            position: fixed;
            inset: 0;
            background: rgba(4, 22, 43, .63);
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
            z-index: 100
        }

        .overlay.open {
            display: flex
        }

        .modal {
            background: white;
            width: min(570px, 100%);
            max-height: 90vh;
            overflow: auto;
            padding: 27px;
            border-radius: 17px;
            box-shadow: 0 15px 75px #0003
        }

        .modal h2 {
            font: 700 23px 'Poppins', 'Roboto', Georgia, serif;
            margin: 0 0 14px
        }

        .modal p {
            line-height: 1.6;
            color: #41546e
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center
        }

        .close-modal {
            border: 0;
            background: #f2f4f7;
            border-radius: 7px;
            padding: 8px 11px
        }

        .modal-cover {
            display: block;
            height: 290px;
            max-width: 100%;
            margin: 10px auto
        }

        .modal-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 20px
        }

        .modal-actions button {
            border: 1px solid #b9cadb;
            border-radius: 7px;
            background: white;
            color: var(--ink);
            padding: 10px 15px
        }

        .note {
            font-size: 12px;
            color: #75839a
        }

        @media(max-width:1180px) {
            .nav {
                gap: 17px
            }

            .brand {
                min-width: auto
            }

            .top-content {
                grid-template-columns: 280px 1fr
            }

            .cover-area {
                padding-right: 15px
            }

            .meta-row {
                grid-template-columns: 22px 125px 1fr
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr)
            }
        }

        @media(max-width:860px) {
            .wrap {
                width: min(100% - 28px, 1384px)
            }

            .nav {
                display: none
            }

            .main-panel {
                padding: 17px
            }

            .top-content {
                grid-template-columns: 1fr
            }

            .cover-area {
                border-right: none;
                display: flex;
                flex-direction: column;
                align-items: center;
                border-bottom: 1px solid var(--border);
                padding: 0 0 24px
            }

            .book-cover {
                width: 230px;
                height: 303px
            }

            .preview {
                max-width: 200px;
                margin-top: -48px
            }

            .meta {
                grid-template-columns: 1fr 1fr;
                gap: 16px
            }

            .meta-row {
                display: flex;
                flex-wrap: wrap;
                gap: 6px
            }

            .meta-row b {
                width: calc(100% - 32px)
            }

            .meta-row span {
                padding-left: 30px
            }

            .summary-row {
                grid-template-columns: 1fr
            }

            .actions {
                grid-template-columns: 1fr
            }

            .horizontal-line {
                margin-top: 20px
            }
        }

        @media(max-width:570px) {
            header {
                height: 67px
            }

            .brand strong {
                font-size: 18px
            }

            .brand-icon {
                font-size: 29px
            }

            .login {
                padding: 10px
            }

            .header-right {
                gap: 8px
            }

            .icon-button {
                display: none
            }

            .breadcrumb {
                font-size: 11px;
                gap: 6px;
                overflow: hidden;
                white-space: nowrap
            }

            .meta {
                grid-template-columns: 1fr
            }

            .access-share {
                gap: 4px
            }

            .access {
                padding: 7px
            }

            .info h1 {
                font-size: 25px
            }

            .related-grid {
                grid-template-columns: 1fr
            }

            .related-item:nth-child(n+3) {
                display: none
            }

            .citation p {
                margin-left: 0
            }

            .related {
                padding: 15px
            }

            .carousel-nav {
                display: none
            }
        }