/* roulang page: index */
:root {
            --primary: #0F8B8D;
            --primary-dark: #0B6E70;
            --primary-light: #E6F4F3;
            --accent: #F2A33C;
            --accent-dark: #D98A24;
            --accent-light: #FFF4E5;
            --text: #16324F;
            --text-muted: #5B6E80;
            --bg: #F6F8F7;
            --white: #FFFFFF;
            --border: #E4EBE8;
            --shadow-sm: 0 2px 8px rgba(22, 50, 79, .06);
            --shadow-md: 0 12px 32px rgba(22, 50, 79, .10);
            --shadow-lg: 0 20px 48px rgba(22, 50, 79, .14);
            --radius: 16px;
            --radius-sm: 10px;
            --transition: .25s ease;
            --fs-hero: clamp(2.2rem, 5vw, 3.6rem);
            --fs-h2: clamp(1.6rem, 3vw, 2.4rem);
            --fs-h3: 1.25rem;
            --fs-body: 1rem;
            --fs-small: .875rem;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: var(--fs-body);
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        .btn {
            border-radius: 999px;
            padding: .65rem 1.75rem;
            font-weight: 600;
            transition: all var(--transition);
            font-size: .95rem;
        }

        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(242, 163, 60, .3);
        }

        .btn-outline-primary {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline-primary:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: .85rem 2.4rem;
            font-size: 1.05rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
            border-color: var(--border);
        }

        .navbar {
            padding: .8rem 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--primary) !important;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 50% 50% 50% 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text) !important;
            padding: .5rem 1rem !important;
            position: relative;
            white-space: nowrap;
        }

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 1rem;
            white-space: nowrap;
        }

        .navbar-toggler {
            border: 2px solid var(--primary);
            border-radius: 8px;
            padding: .35rem .6rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--white);
                border-radius: var(--radius);
                margin-top: .8rem;
                padding: 1rem;
                box-shadow: var(--shadow-md);
            }

            .navbar-nav .nav-link {
                padding: .9rem 1rem !important;
                min-height: 48px;
                border-radius: 8px;
            }

            .navbar-nav .nav-link:hover {
                background: var(--primary-light);
            }

            .nav-cta {
                margin-left: 0;
                margin-top: .5rem;
                width: 100%;
            }

            .nav-cta .btn {
                width: 100%;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding-top: 10.5rem;
            padding-bottom: 4rem;
            background: linear-gradient(rgba(255, 255, 255, .88), rgba(255, 255, 255, .76)), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-light);
            color: var(--accent-dark);
            border-radius: 999px;
            padding: .35rem 1rem;
            font-size: var(--fs-small);
            font-weight: 600;
            margin-bottom: 1.2rem;
        }

        .hero h1 {
            font-size: var(--fs-hero);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 1rem;
        }

        .hero h1 span {
            color: var(--primary);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 540px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
            margin-bottom: 3rem;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(228, 235, 232, .8);
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .hero-stat .label {
            font-size: var(--fs-small);
            color: var(--text-muted);
            margin-top: .2rem;
        }

        @media (max-width: 767px) {
            .hero {
                padding-top: 9rem;
                padding-bottom: 3rem;
                text-align: center;
            }

            .hero-desc {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-btns {
                justify-content: center;
            }

            .hero-stats {
                justify-content: center;
                gap: 1.5rem;
            }

            .hero-stat .num {
                font-size: 1.6rem;
            }
        }

        /* ===== Section Common ===== */
        .section-padding {
            padding-top: clamp(4rem, 8vw, 6.5rem);
            padding-bottom: clamp(4rem, 8vw, 6.5rem);
        }

        .section-title {
            font-size: var(--fs-h2);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: .8rem;
        }

        .section-sub {
            font-size: var(--fs-body);
            color: var(--text-muted);
            max-width: 480px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 3rem;
            flex-wrap: wrap;
        }

        /* ===== Value Propositions ===== */
        .value-section {
            background: var(--bg);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, .8);
        }

        .value-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: start;
        }

        .value-heading {
            position: sticky;
            top: 120px;
        }

        .value-heading .label {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            font-size: var(--fs-small);
            padding: .3rem 1rem;
            border-radius: 999px;
            margin-bottom: 1rem;
        }

        .value-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem;
        }

        .value-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.6rem;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .value-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .value-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            margin-bottom: .5rem;
            display: block;
        }

        .value-card h3 {
            font-size: var(--fs-h3);
            font-weight: 700;
            margin-bottom: .5rem;
        }

        .value-card p {
            font-size: .95rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        @media (max-width: 991px) {
            .value-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .value-heading {
                position: static;
            }
        }

        @media (max-width: 575px) {
            .value-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--white);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .feature-card {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.75rem;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            background: var(--white);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: var(--fs-h3);
            font-weight: 700;
            margin-bottom: .75rem;
        }

        .feature-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .feature-card ul li {
            padding: .3rem 0;
            font-size: .95rem;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .feature-card ul li i {
            color: var(--primary);
            margin-top: .3rem;
            font-size: .85rem;
        }

        @media (max-width: 767px) {
            .features-grid {
                grid-template-columns: 1fr;
                max-width: 460px;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* ===== Scenarios ===== */
        .scenarios-section {
            background: var(--bg);
        }

        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            margin-bottom: 4rem;
        }

        .scenario-row:last-child {
            margin-bottom: 0;
        }

        .scenario-row.reverse {
            direction: rtl;
        }

        .scenario-row.reverse>* {
            direction: ltr;
        }

        .scenario-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
        }

        .scenario-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .scenario-img:hover img {
            transform: scale(1.04);
        }

        .scenario-content .label {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-weight: 600;
            font-size: var(--fs-small);
            padding: .3rem .9rem;
            border-radius: 999px;
            margin-bottom: .8rem;
        }

        .scenario-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: .8rem;
        }

        .scenario-content p {
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 1rem;
        }

        .scenario-link {
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .95rem;
        }

        .scenario-link i {
            transition: transform var(--transition);
        }

        .scenario-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 991px) {
            .scenario-row {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                max-width: 640px;
                margin-left: auto;
                margin-right: auto;
                margin-bottom: 3rem;
            }

            .scenario-row.reverse {
                direction: ltr;
            }
        }

        @media (max-width: 575px) {
            .scenario-img {
                aspect-ratio: 16/10;
            }
        }

        /* ===== Cases ===== */
        .cases-section {
            background: var(--white);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            align-items: center;
        }

        .case-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }

        .case-card:hover {
            transform: translateY(-6px) scale(1.01);
            box-shadow: var(--shadow-lg);
        }

        .case-card.featured {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--white);
            transform: scale(1.04);
            box-shadow: var(--shadow-lg);
        }

        .case-card.featured:hover {
            transform: translateY(-6px) scale(1.04);
        }

        .case-avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 auto 1rem;
        }

        .case-card.featured .case-avatar {
            background: rgba(255, 255, 255, .2);
            color: var(--white);
        }

        .case-role {
            font-size: var(--fs-small);
            color: var(--text-muted);
            font-weight: 600;
            margin-bottom: .4rem;
        }

        .case-card.featured .case-role {
            color: rgba(255, 255, 255, .8);
        }

        .case-metric {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent);
            margin: .6rem 0;
            font-variant-numeric: tabular-nums;
        }

        .case-card.featured .case-metric {
            color: var(--accent);
        }

        .case-text {
            font-size: .95rem;
            color: var(--text-muted);
            font-style: italic;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .case-card.featured .case-text {
            color: rgba(255, 255, 255, .9);
        }

        @media (max-width: 991px) {
            .cases-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            .cases-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* ===== Pricing ===== */
        .pricing-section {
            background: var(--bg);
        }

        .pricing-subhead {
            text-align: center;
            margin-bottom: 3rem;
        }

        .pricing-card {
            background: var(--white);
            border: 2px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.75rem;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .pricing-card.premium {
            border-color: var(--accent);
            position: relative;
            box-shadow: var(--shadow-md);
        }

        .pricing-card .pricing-tag {
            font-size: var(--fs-small);
            color: var(--text-muted);
            margin-bottom: .5rem;
            font-weight: 600;
        }

        .pricing-card .price {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            font-variant-numeric: tabular-nums;
            margin-bottom: .5rem;
        }

        .pricing-card .period {
            color: var(--text-muted);
            font-size: .9rem;
        }

        .pricing-card .feature-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0;
            flex-grow: 1;
        }

        .pricing-card .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: .45rem 0;
            font-size: .95rem;
            color: var(--text);
        }

        .pricing-card .feature-list li i {
            color: var(--primary);
            margin-top: .35rem;
            font-size: .85rem;
        }

        .pricing-card .feature-list li.disabled {
            color: var(--text-muted);
            opacity: .5;
            text-decoration: line-through;
        }

        .pricing-card .feature-list li.disabled i {
            color: var(--text-muted);
        }

        .pricing-card .btn {
            width: 100%;
        }

        .pricing-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: var(--text);
            font-weight: 700;
            font-size: .8rem;
            padding: .25rem 1.2rem;
            border-radius: 999px;
            box-shadow: var(--shadow-sm);
        }

        @media (max-width: 767px) {
            .pricing-card {
                max-width: 420px;
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--white);
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: .8rem;
            overflow: hidden;
            background: var(--white);
        }

        .accordion-button {
            font-weight: 600;
            color: var(--text);
            padding: 1.2rem 1.5rem;
            background: var(--white);
            font-size: 1rem;
            border-radius: var(--radius) !important;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(15, 139, 141, .2);
        }

        .accordion-button::after {
            filter: hue-rotate(150deg);
        }

        .accordion-body {
            padding: 1.2rem 1.5rem;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--bg);
        }

        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            position: relative;
            overflow: hidden;
            text-align: center;
            padding-top: calc(clamp(4rem, 8vw, 6.5rem) + 1rem);
            padding-bottom: clamp(4rem, 8vw, 6.5rem);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: -40px;
            left: -80px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .05);
        }

        .cta-section h2 {
            font-size: var(--fs-h2);
            font-weight: 800;
            color: var(--white);
            margin-bottom: .8rem;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .85);
            max-width: 520px;
            margin: 0 auto 2rem;
            position: relative;
            z-index: 1;
            font-size: 1.05rem;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #12263A;
            color: #A8B8C8;
            padding: 4rem 0 0;
        }

        .site-footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 1.2rem;
        }

        .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: .8rem;
        }

        .footer-brand .brand-mark {
            background: var(--primary);
        }

        .site-footer p {
            color: #A8B8C8;
            font-size: .9rem;
            line-height: 1.7;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            padding: .3rem 0;
        }

        .footer-links a {
            color: #A8B8C8;
            font-size: .9rem;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-newsletter {
            margin-top: .5rem;
        }

        .footer-newsletter .input-group {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-newsletter .form-control {
            flex: 1;
            min-width: 170px;
            background: rgba(255, 255, 255, .08);
            border: 2px solid rgba(255, 255, 255, .15);
            border-radius: 999px;
            color: var(--white);
            padding: .55rem 1.2rem;
            font-size: .9rem;
        }

        .footer-newsletter .form-control::placeholder {
            color: rgba(255, 255, 255, .5);
        }

        .footer-newsletter .form-control:focus {
            background: rgba(255, 255, 255, .12);
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(242, 163, 60, .2);
            color: var(--white);
        }

        .footer-newsletter .btn {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
            font-weight: 600;
            border-radius: 999px;
            padding: .55rem 1.4rem;
            font-size: .9rem;
            white-space: nowrap;
        }

        .footer-newsletter .btn:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 1.5rem 0;
            margin-top: 3rem;
            font-size: .85rem;
            text-align: center;
            color: #7A8A99;
        }

        .footer-bottom a {
            color: #7A8A99;
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 767px) {
            .site-footer .row>div {
                margin-bottom: 2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0F8B8D;
            --primary-dark: #0B6E70;
            --primary-light: #E6F4F3;
            --accent: #F2A33C;
            --accent-dark: #D98A24;
            --accent-light: #FFF4E5;
            --text: #16324F;
            --text-muted: #5B6E80;
            --bg: #F6F8F7;
            --white: #FFFFFF;
            --border: #E4EBE8;
            --shadow-sm: 0 2px 8px rgba(22, 50, 79, .06);
            --shadow-md: 0 12px 32px rgba(22, 50, 79, .10);
            --shadow-lg: 0 20px 48px rgba(22, 50, 79, .14);
            --radius: 16px;
            --radius-sm: 10px;
            --transition: .25s ease;
            --fs-hero: clamp(2rem, 4vw, 2.8rem);
            --fs-h2: clamp(1.5rem, 2.5vw, 2rem);
            --fs-h3: 1.15rem;
            --fs-body: 1rem;
            --fs-small: .875rem;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: var(--fs-body);
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        .btn {
            border-radius: 999px;
            padding: .65rem 1.75rem;
            font-weight: 600;
            transition: all var(--transition);
            font-size: .95rem;
        }

        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(242, 163, 60, .3);
        }

        .btn-outline-primary {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline-primary:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: .85rem 2.4rem;
            font-size: 1.05rem;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
            border-color: var(--border);
        }

        .navbar {
            padding: .8rem 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--primary) !important;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 50% 50% 50% 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text) !important;
            padding: .5rem 1rem !important;
            position: relative;
            white-space: nowrap;
        }

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 1rem;
            white-space: nowrap;
        }

        .navbar-toggler {
            border: 2px solid var(--primary);
            border-radius: 8px;
            padding: .35rem .6rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .navbar-collapse {
            background: var(--white);
            border-radius: var(--radius);
            margin-top: .8rem;
            padding: 1rem;
            box-shadow: var(--shadow-md);
        }

        .navbar-nav .nav-link {
            padding: .9rem 1rem !important;
            min-height: 48px;
            border-radius: 8px;
        }

        .navbar-nav .nav-link:hover {
            background: var(--primary-light);
        }

        .nav-cta {
            margin-left: 0;
            margin-top: .5rem;
            width: 100%;
        }

        .nav-cta .btn {
            width: 100%;
        }

        /* ===== 分类页页头横幅 ===== */
        .category-hero {
            position: relative;
            padding: 8.5rem 0 4rem;
            background: linear-gradient(rgba(255, 255, 255, .92), rgba(255, 255, 255, .78)), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .category-hero .breadcrumb {
            margin-bottom: 2rem;
            --bs-breadcrumb-divider: '›';
            font-size: .9rem;
        }

        .category-hero .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
        }

        .category-hero .breadcrumb a:hover {
            color: var(--primary);
        }

        .category-hero .breadcrumb .active {
            color: var(--primary);
            font-weight: 600;
        }

        .category-hero h1 {
            font-size: var(--fs-hero);
            font-weight: 800;
            color: var(--text);
            letter-spacing: -1px;
            margin-bottom: 1rem;
            line-height: 1.25;
        }

        .category-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ===== 筛选条 ===== */
        .filter-bar {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 1rem 0;
        }

        .filter-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            padding: 4px 0 6px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .filter-tabs::-webkit-scrollbar {
            display: none;
        }

        .filter-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: .45rem 1.25rem;
            border-radius: 999px;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: .875rem;
            font-weight: 500;
            white-space: nowrap;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }

        .filter-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .filter-tab.active {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(242, 163, 60, .3);
        }

        .filter-tab:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 主内容区 ===== */
        .category-content {
            padding: 3rem 0 5rem;
        }

        .list-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
            gap: 8px;
        }

        .list-header h2 {
            font-size: var(--fs-h2);
            font-weight: 700;
            margin: 0;
        }

        .list-header .count {
            font-size: var(--fs-small);
            color: var(--text-muted);
            background: var(--primary-light);
            border-radius: 999px;
            padding: .3rem 1rem;
            font-weight: 500;
        }

        /* 资源卡片 */
        .resource-card {
            display: flex;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 1.25rem;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
        }

        .resource-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .resource-card .card-cover {
            width: 260px;
            flex-shrink: 0;
            position: relative;
            min-height: 160px;
            overflow: hidden;
        }

        .resource-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .resource-card:hover .card-cover img {
            transform: scale(1.05);
        }

        .resource-card .card-cover .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-weight: 600;
            font-size: .75rem;
            padding: .35rem .8rem;
            border-radius: 999px;
            backdrop-filter: blur(4px);
            box-shadow: var(--shadow-sm);
        }

        .resource-card .card-body {
            padding: 1.5rem 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: .5rem;
            color: var(--text);
            line-height: 1.4;
        }

        .resource-card .card-body h3 a {
            color: var(--text);
            transition: color var(--transition);
        }

        .resource-card .card-body h3 a:hover {
            color: var(--primary);
        }

        .resource-card .card-body p {
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: .75rem;
            flex: 1;
        }

        .resource-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            font-size: .8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: .75rem;
        }

        .resource-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .resource-card .card-meta i {
            color: var(--primary);
            font-size: .75rem;
        }

        /* 分页器 */
        .pagination-wrap {
            margin-top: 2.5rem;
        }

        .pagination {
            --bs-pagination-border-radius: 999px;
            --bs-pagination-active-bg: var(--accent);
            --bs-pagination-active-border-color: var(--accent);
            --bs-pagination-active-color: var(--text);
            --bs-pagination-color: var(--text);
            --bs-pagination-hover-color: var(--primary);
            --bs-pagination-hover-bg: var(--primary-light);
            --bs-pagination-hover-border-color: var(--primary);
            --bs-pagination-border-color: var(--border);
            --bs-pagination-bg: var(--white);
        }

        .pagination .page-item {
            margin: 0 4px;
        }

        .pagination .page-link {
            border-radius: 999px !important;
            font-weight: 500;
            padding: .5rem 1rem;
            border: 1px solid var(--border);
        }

        .pagination .page-item.active .page-link {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(242, 163, 60, .25);
        }

        .pagination .page-item.disabled .page-link {
            color: #c0ccd2;
            border-color: var(--border);
            background: var(--white);
        }

        .pagination .page-link:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            box-shadow: none;
        }

        /* ===== 侧栏 ===== */
        .sidebar {
            padding-left: 1rem;
        }

        .widget {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
        }

        .widget h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .widget h5 i {
            color: var(--primary);
            font-size: .9rem;
        }

        .widget h5::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border);
            margin-left: 8px;
        }

        .hot-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .hot-list li {
            display: flex;
            align-items: baseline;
            gap: 12px;
            padding: .65rem 0;
            border-bottom: 1px dashed var(--border);
            transition: all var(--transition);
            position: relative;
        }

        .hot-list li:last-child {
            border-bottom: none;
        }

        .hot-list li:hover {
            padding-left: 8px;
        }

        .hot-list li:hover::before {
            content: '';
            position: absolute;
            left: -6px;
            top: 8px;
            bottom: 8px;
            width: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .hot-list .num {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--accent);
            font-family: 'PingFang SC', sans-serif;
            min-width: 28px;
            font-variant-numeric: tabular-nums;
        }

        .hot-list a {
            color: var(--text);
            font-size: .9rem;
            line-height: 1.4;
            font-weight: 500;
            transition: color var(--transition);
            text-decoration: none;
        }

        .hot-list a:hover {
            color: var(--primary);
        }

        .widget-newsletter p {
            font-size: .875rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
            line-height: 1.6;
        }

        .widget-newsletter form {
            display: flex;
            gap: 8px;
        }

        .widget-newsletter input {
            flex: 1;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .55rem 1rem;
            font-size: .875rem;
            color: var(--text);
            background: var(--white);
            transition: border-color var(--transition), box-shadow var(--transition);
            min-width: 0;
        }

        .widget-newsletter input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 139, 141, .12);
        }

        .widget-newsletter button {
            background: var(--accent);
            border: none;
            border-radius: 999px;
            padding: .55rem 1.25rem;
            font-size: .875rem;
            font-weight: 600;
            color: var(--text);
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .widget-newsletter button:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(242, 163, 60, .3);
        }

        .widget-newsletter button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

        .tags .tag {
            display: inline-block;
            padding: .3rem .9rem;
            border-radius: 999px;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: .8rem;
            transition: all var(--transition);
            text-decoration: none;
        }

        .tags .tag:hover {
            border-color: var(--accent);
            color: var(--text);
            background: var(--accent-light);
        }

        .tags .tag:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== CTA 通栏 ===== */
        .cta-section {
            background: var(--primary);
            padding: 4.5rem 0;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -30px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .05);
        }

        .cta-section h2 {
            color: var(--white);
            font-size: var(--fs-h2);
            font-weight: 800;
            margin-bottom: .75rem;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .85);
            max-width: 520px;
            margin: 0 auto 2rem;
            font-size: 1rem;
            position: relative;
            z-index: 1;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        .cta-section .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--text);
            font-weight: 700;
            padding: .85rem 2.6rem;
            font-size: 1.05rem;
        }

        .cta-section .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, .2);
        }

        .cta-section .btn-accent:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 2px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--white);
            border-top: 1px solid var(--border);
            padding: 4rem 0 2rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .footer-brand .brand-mark {
            width: 32px;
            height: 32px;
            font-size: .875rem;
        }

        .site-footer p {
            color: var(--text-muted);
            font-size: .875rem;
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .site-footer h5 {
            font-size: .95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1.1rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: .55rem;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: .875rem;
            text-decoration: none;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-newsletter .input-group {
            flex-wrap: nowrap;
        }

        .footer-newsletter .form-control {
            border: 1px solid var(--border);
            border-radius: 999px 0 0 999px !important;
            padding: .6rem 1.2rem;
            font-size: .875rem;
            background: var(--bg);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .footer-newsletter .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 139, 141, .12);
            background: var(--white);
        }

        .footer-newsletter .btn {
            background: var(--accent);
            color: var(--text);
            border-radius: 0 999px 999px 0 !important;
            border: none;
            font-weight: 600;
            padding: .6rem 1.4rem;
            font-size: .875rem;
            transition: all var(--transition);
        }

        .footer-newsletter .btn:hover {
            background: var(--accent-dark);
            color: var(--text);
        }

        .footer-newsletter .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: -3px;
        }

        .footer-bottom {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
            text-align: center;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: .8rem;
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (min-width: 992px) {
            .navbar-collapse {
                background: transparent;
                box-shadow: none;
                border-radius: 0;
                padding: 0;
                margin-top: 0;
            }

            .navbar-nav .nav-link {
                padding: .5rem 1rem !important;
                min-height: auto;
                border-radius: 0;
            }

            .navbar-nav .nav-link:hover {
                background: transparent;
            }

            .nav-cta {
                margin-left: 1rem;
                margin-top: 0;
                width: auto;
            }

            .nav-cta .btn {
                width: auto;
            }
        }

        @media (max-width: 991.98px) {
            .category-hero {
                padding: 7rem 0 3rem;
            }

            .sidebar {
                padding-left: 0;
                margin-top: 2.5rem;
            }
        }

        @media (max-width: 767.98px) {
            .resource-card {
                flex-direction: column;
            }

            .resource-card .card-cover {
                width: 100%;
                height: 200px;
            }

            .category-hero h1 {
                font-size: clamp(1.7rem, 5vw, 2.4rem);
            }

            .category-hero .hero-desc {
                font-size: .95rem;
            }

            .filter-tab {
                padding: .4rem 1rem;
                font-size: .82rem;
            }

            .card-meta {
                gap: .6rem !important;
            }

            .widget-newsletter form {
                flex-direction: column;
            }

            .widget-newsletter button {
                width: 100%;
            }

            .footer-newsletter .input-group {
                flex-direction: column;
                gap: 8px;
            }

            .footer-newsletter .form-control {
                border-radius: 999px !important;
                width: 100% !important;
            }

            .footer-newsletter .btn {
                border-radius: 999px !important;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 6.5rem 0 2.5rem;
            }

            .resource-card .card-cover {
                height: 180px;
            }

            .resource-card .card-body {
                padding: 1.25rem;
            }

            .list-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .cta-section {
                padding: 3.5rem 0;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}