:root {
            --surface: #ffffff;
            --surface-subtle: rgba(255, 255, 255, 0.96);
            --surface-muted: #f4f7fc;
            --background-top: #fbfcff;
            --background-bottom: #eef3f9;
            --primary: #2563eb;
            --primary-strong: #1d4ed8;
            --primary-soft: #e8f0ff;
            --secondary-soft: #edf8f7;
            --accent: #0f766e;
            --text-strong: #0f172a;
            --text-muted: #64748b;
            --outline: #d7e1ee;
            --outline-strong: #c6d3e5;
            --shadow-soft: 0 12px 28px rgba(15, 23, 42, 0.06);
            --shadow-float: 0 18px 48px rgba(37, 99, 235, 0.08);
            --radius-xl: 20px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-pill: 999px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--yee-font-sans);
            color: var(--text-strong);
            background: linear-gradient(180deg, var(--background-top) 0%, #f7f9fd 42%, var(--background-bottom) 100%);
            line-height: 1.7;
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            font-family: var(--yee-font-display);
            color: var(--text-strong);
            letter-spacing: 0;
        }

        p {
            margin: 0;
        }

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

        #spinner {
            opacity: 0;
            visibility: hidden;
            transition: opacity .4s ease, visibility 0s linear .4s;
            z-index: 99999;
        }

        #spinner.show {
            opacity: 1;
            visibility: visible;
            transition: opacity .4s ease, visibility 0s linear 0s;
        }

        .page-shell {
            padding: 0 18px 56px;
        }

        .container-xxl {
            max-width: 1320px;
        }

        .navbar {
            padding: 14px 0;
            background: rgba(255, 255, 255, 0.9);
            border-bottom: 1px solid rgba(215, 225, 238, 0.85);
            backdrop-filter: saturate(140%) blur(16px);
            box-shadow: 0 8px 24px rgba(148, 163, 184, 0.08);
        }

        .navbar.is-scrolled {
            background: rgba(255, 255, 255, 0.97);
            border-bottom-color: rgba(198, 211, 229, 0.94);
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.11);
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            color: var(--text-strong);
        }

        .brand-mark {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: linear-gradient(180deg, rgba(37, 99, 235, 0.14), rgba(37, 99, 235, 0.04));
            border: 1px solid rgba(37, 99, 235, 0.12);
        }

        .brand-copy {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 2px;
            min-height: 46px;
        }

        .brand-copy strong {
            display: block;
            font-size: 1.35rem;
            line-height: 1.12;
            letter-spacing: 0;
        }

        .brand-copy span {
            display: block;
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.18;
            letter-spacing: 0;
        }

        .navbar-toggler {
            border: 1px solid var(--outline);
            border-radius: 14px;
            padding: 10px 12px;
            color: var(--text-strong);
            background: #fff;
            box-shadow: none;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
        }

        .chapter-nav {
            gap: 10px;
        }

        .nav-link {
            min-height: 42px;
            padding: 0 16px !important;
            border-radius: var(--radius-pill);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted) !important;
            font-weight: 700;
            font-size: 0.96rem;
            letter-spacing: 0;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary) !important;
            background: rgba(37, 99, 235, 0.08);
        }

        .top-actions {
            gap: 12px;
        }

        .pill-button,
        .lang-button {
            height: 48px;
            min-height: 48px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--outline);
            background: #fff;
            color: var(--text-strong);
            font-weight: 700;
            padding: 0 18px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            line-height: 1 !important;
            text-align: center;
            white-space: nowrap;
            box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
        }

        .pill-button > *,
        .lang-button > *,
        .primary-button > *,
        .secondary-button > *,
        .policy-link-button > * {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
        }

        .pill-button:hover,
        .lang-button:hover {
            color: var(--primary);
            border-color: rgba(37, 99, 235, 0.22);
            background: #f9fbff;
        }

        .hero-panel {
            margin-top: 74px;
            padding: 0;
            border-bottom: 1px solid rgba(215, 225, 238, 0.82);
            background: linear-gradient(180deg, rgba(248, 251, 255, 0.96), rgba(238, 246, 255, 0.72));
        }

        .hero-card {
            padding: 52px 36px 40px;
            border-radius: 0;
            background: transparent;
            border: 0;
            box-shadow: none;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 42px;
            padding: 0 16px;
            border-radius: var(--radius-pill);
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            border: 1px solid rgba(37, 99, 235, 0.1);
            font-weight: 700;
            font-size: 0.95rem;
        }

        .hero-title {
            max-width: 720px;
            margin: 20px auto 14px;
            font-size: 4rem;
            line-height: 1.1;
            word-break: keep-all;
            text-wrap: balance;
        }

        .hero-subtitle {
            max-width: 620px;
            margin: 0 auto;
            font-size: 1.08rem;
            color: var(--text-muted);
            word-break: keep-all;
        }

        .hero-summary {
            margin-top: 30px;
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 14px;
        }

        .summary-card {
            padding: 20px 22px;
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.96);
            border: 1px solid rgba(215, 225, 238, 0.8);
            box-shadow: 0 10px 22px rgba(15, 23, 42, 0.04);
            text-align: left;
        }

        .summary-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: grid;
            place-items: center;
            background: var(--primary-soft);
            color: var(--primary);
            margin-bottom: 12px;
        }

        .summary-card strong {
            display: block;
            font-size: 0.98rem;
            margin-bottom: 4px;
        }

        .summary-card span {
            display: block;
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.5;
        }

        .hero-actions {
            margin-top: 28px;
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .primary-button,
        .secondary-button {
            height: 52px;
            min-height: 52px;
            padding: 0 24px;
            border-radius: 16px;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            line-height: 1 !important;
            text-align: center;
            white-space: nowrap;
            transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
        }

        .primary-button {
            color: #fff;
            background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
            border: 1px solid rgba(37, 99, 235, 0.15);
            box-shadow: 0 12px 26px rgba(37, 99, 235, 0.18);
        }

        .secondary-button {
            color: var(--text-strong);
            background: #fff;
            border: 1px solid var(--outline);
            box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
        }

        .primary-button:hover,
        .secondary-button:hover {
            transform: translateY(-1px);
        }

        .policy-layout {
            display: grid;
            grid-template-columns: 300px minmax(0, 1fr);
            gap: 22px;
            align-items: start;
            margin-top: 28px;
        }

        .policy-sidebar {
            position: sticky;
            top: 104px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .side-card {
            padding: 22px 20px;
            border-radius: 16px;
            background: var(--surface-subtle);
            border: 1px solid rgba(215, 225, 238, 0.86);
            box-shadow: var(--shadow-soft);
        }

        .side-card-title {
            font-size: 1rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 0;
        }

        .outline-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .outline-link {
            display: grid;
            grid-template-columns: 34px minmax(0, 1fr);
            gap: 12px;
            align-items: start;
            padding: 10px 12px;
            border-radius: 14px;
            color: var(--text-muted);
            transition: background 0.18s ease, color 0.18s ease;
        }

        .outline-link:hover,
        .outline-link.active {
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }

        .outline-index {
            width: 34px;
            height: 34px;
            border-radius: 12px;
            display: grid;
            place-items: center;
            background: #f3f6fb;
            color: var(--primary);
            font-weight: 800;
            font-size: 0.92rem;
        }

        .outline-link span:last-child {
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.45;
            word-break: keep-all;
        }

        .related-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .related-link {
            padding: 14px 16px;
            border-radius: 14px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            background: #fff;
            border: 1px solid rgba(215, 225, 238, 0.84);
        }

        .related-link strong {
            display: block;
            font-size: 0.96rem;
            margin-bottom: 2px;
        }

        .related-link small {
            color: var(--text-muted);
            font-size: 0.84rem;
        }

        .contact-copy {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 18px;
        }

        .policy-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .policy-section {
            padding: 0;
            border: 0;
            scroll-margin-top: 112px;
        }

        .policy-card {
            padding: 30px 32px;
            border-radius: 16px;
            border: 1px solid rgba(215, 225, 238, 0.86);
            background: var(--surface-subtle);
            box-shadow: var(--shadow-soft);
        }

        .section-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 18px;
            margin-bottom: 18px;
        }

        .section-heading {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            min-width: 0;
        }

        .chapter-badge {
            min-width: 40px;
            height: 40px;
            border-radius: 12px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.09);
            font-weight: 800;
            font-size: 1rem;
        }

        .policy-card h2 {
            font-size: 2rem;
            line-height: 1.22;
            word-break: keep-all;
        }

        .section-kicker {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 700;
            margin-bottom: 4px;
        }

        .section-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            color: var(--primary);
            background: linear-gradient(180deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.03));
            flex-shrink: 0;
        }

        .policy-text {
            color: var(--text-muted);
            white-space: pre-line;
            font-size: 1rem;
            line-height: 1.8;
            word-break: keep-all;
        }

        .policy-emphasis {
            margin-top: 18px;
            padding: 18px 20px;
            border-radius: 16px;
            background: linear-gradient(180deg, rgba(244, 247, 252, 0.96), rgba(255, 255, 255, 0.94));
            border: 1px solid rgba(215, 225, 238, 0.86);
        }

        .policy-link {
            color: var(--primary);
            font-weight: 700;
            text-decoration: none;
        }

        .policy-link:hover {
            color: var(--primary-strong);
        }

        .policy-link-button {
            margin-top: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 0 18px;
            border-radius: 14px;
            background: #fff;
            border: 1px solid var(--outline);
            color: var(--primary);
            font-weight: 800;
        }

        .permission-list {
            margin-top: 16px;
            display: grid;
            gap: 12px;
        }

        .permission-row {
            padding: 16px 18px;
            border-radius: 16px;
            display: grid;
            grid-template-columns: 52px minmax(0, 220px) minmax(0, 1fr);
            gap: 14px;
            align-items: start;
            background: #fff;
            border: 1px solid rgba(215, 225, 238, 0.84);
        }

        .permission-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 1.1rem;
        }

        .permission-label {
            font-size: 1rem;
            font-weight: 800;
            line-height: 1.45;
        }

        .permission-value {
            color: var(--text-muted);
            font-size: 0.96rem;
            line-height: 1.65;
        }

        .policy-footnote {
            margin-top: 14px;
            color: var(--text-muted);
            font-size: 0.92rem;
        }

        .policy-subsection {
            margin-top: 28px;
            padding-top: 24px;
            border-top: 1px solid rgba(215, 225, 238, 0.9);
        }

        .policy-subsection h3 {
            margin-bottom: 8px;
            font-size: 1.24rem;
            line-height: 1.4;
        }

        .policy-footer {
            margin-top: 28px;
            padding: 22px 20px;
            border-radius: 16px;
            border: 1px solid rgba(215, 225, 238, 0.84);
            background: rgba(255, 255, 255, 0.92);
            text-align: center;
            color: var(--text-muted);
            font-size: 0.92rem;
        }

        .policy-footer strong {
            display: block;
            color: var(--text-strong);
            margin-top: 8px;
            font-size: 0.92rem;
        }

        .policy-footer > span {
            display: block;
        }

        .policy-footer > span + span {
            margin-top: 8px;
        }

        .back-to-top {
            width: 52px !important;
            height: 52px !important;
            min-width: 52px;
            padding: 0 !important;
            right: 20px;
            bottom: 20px;
            z-index: 9;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transform: translateY(8px);
            transition: opacity 0.18s ease, transform 0.18s ease;
        }

        .back-to-top.is-visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        @media (max-width: 1199.98px) {
            .hero-summary {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .policy-layout {
                grid-template-columns: 1fr;
            }

            .policy-sidebar {
                position: static;
                order: -1;
            }
        }

        @media (max-width: 991.98px) {
            .page-shell {
                padding: 0 14px 64px;
            }

            .navbar {
                left: 0;
                right: 0;
                width: 100vw;
                max-width: 100vw;
                padding: 12px 0;
            }

            .navbar .container-xxl {
                position: relative;
                width: 100%;
                max-width: 100%;
                padding-left: 16px;
                padding-right: 16px;
            }

            .navbar-brand {
                min-width: 0;
                padding-right: 60px;
            }

            .navbar-toggler {
                position: absolute;
                top: 50%;
                right: 16px;
                width: 48px;
                height: 48px;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                transform: translateY(-50%);
            }

            .chapter-nav {
                padding-top: 14px;
            }

            .top-actions {
                padding-top: 14px;
                flex-direction: column;
                align-items: stretch !important;
            }

            .pill-button,
            .lang-button,
            .primary-button,
            .secondary-button {
                width: 100%;
            }

            .hero-panel {
                margin-top: 72px;
                padding: 0;
            }

            .hero-card {
                padding: 38px 20px 32px;
                border-radius: 0;
            }

            .hero-title {
                font-size: 3.2rem;
            }

            .section-top,
            .section-heading {
                flex-direction: column;
            }

            .section-icon {
                width: 48px;
                height: 48px;
                border-radius: 14px;
            }
        }

        @media (max-width: 767.98px) {
            .page-shell {
                padding-left: 0;
                padding-right: 0;
            }

            main.container-xxl {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand-copy strong {
                font-size: 1.2rem;
            }

            .brand-copy span {
                font-size: 0.82rem;
            }

            .hero-title {
                max-width: 320px;
                font-size: 2.18rem;
                line-height: 1.16;
            }

            .hero-subtitle {
                max-width: 300px;
                font-size: 1rem;
            }

            .hero-summary {
                grid-template-columns: repeat(2, minmax(0, 1fr));
                gap: 12px;
            }

            .summary-card {
                padding: 16px 14px;
                min-width: 0;
            }

            .summary-icon {
                width: 42px;
                height: 42px;
                margin-bottom: 10px;
            }

            .summary-card strong {
                font-size: 0.94rem;
                line-height: 1.32;
                word-break: keep-all;
            }

            .summary-card span {
                font-size: 0.84rem;
                line-height: 1.55;
            }

            .policy-card,
            .side-card {
                padding: 22px 18px;
                border-radius: 16px;
            }

            .policy-card h2 {
                font-size: 1.6rem;
            }

            .hero-actions {
                flex-direction: column;
                max-width: 100%;
                margin-top: 16px;
            }

            .primary-button,
            .secondary-button {
                width: 100%;
            }

            .permission-row {
                grid-template-columns: 1fr;
            }

            .permission-icon {
                width: 46px;
                height: 46px;
                border-radius: 14px;
            }

            .outline-link {
                grid-template-columns: 30px minmax(0, 1fr);
                padding: 12px 10px;
                border-radius: 12px;
                background: #fff;
                border: 1px solid rgba(215, 225, 238, 0.72);
            }

            .outline-index {
                width: 30px;
                height: 30px;
                border-radius: 10px;
            }

            .back-to-top {
                width: 48px !important;
                height: 48px !important;
                min-width: 48px;
                right: 16px;
                bottom: 16px;
            }
        }

        @media (max-width: 360px) {
            .hero-summary {
                grid-template-columns: 1fr;
            }
        }