/* roulang page: index */
:root {
            --color-primary: #0F9D6E;
            --color-accent: #FF6B35;
            --color-ink: #171714;
            --color-paper: #F7F5F0;
            --color-forest: #171714;
            --color-gold: #F5B942;
            --color-muted: #6B6A64;
            --color-line: #E7E3DA;
            --radius-card: 16px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
            --transition-base: 300ms ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'sans-serif';
            background-color: var(--color-paper);
            color: var(--color-ink);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 0.9375rem;
        }

        /* Container */
        .container {
            width: 100%;
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container { padding-left: 1.5rem; padding-right: 1.5rem; }
        }
        @media (min-width: 1024px) {
            .container { padding-left: 2rem; padding-right: 2rem; }
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            border: 2px solid var(--color-primary);
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .btn-primary:hover {
            background-color: #0B7A54;
            border-color: #0B7A54;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(15, 157, 110, 0.28);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            background: transparent;
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            border: 2px solid var(--color-line);
            color: var(--color-ink);
            font-weight: 600;
            font-size: 0.9375rem;
            background: transparent;
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .btn-outline:hover {
            background: rgba(15, 157, 110, 0.08);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.625rem 1.5rem;
            border-radius: 9999px;
            background: #fff;
            color: var(--color-ink);
            font-weight: 600;
            font-size: 0.9375rem;
            transition: all var(--transition-base);
        }
        .btn-white:hover {
            background: var(--color-paper);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
        }

        /* Section label */
        .section-label {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-primary);
            background: rgba(15, 157, 110, 0.1);
            padding: 0.375rem 0.875rem;
            border-radius: 9999px;
            margin-bottom: 1rem;
        }

        /* Card */
        .card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-line);
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
            border-color: rgba(15, 157, 110, 0.5);
        }

        /* News card */
        .news-card {
            display: block;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-line);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-card:hover .news-title {
            color: var(--color-primary);
        }
        .news-thumb {
            overflow: hidden;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }
        .news-thumb img {
            transition: transform 500ms ease;
        }
        .news-title {
            transition: color var(--transition-base);
        }
        .link-more {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.875rem;
            transition: gap var(--transition-base);
        }
        .news-card:hover .link-more {
            gap: 0.625rem;
        }

        /* Badge / Tag */
        .badge {
            display: inline-block;
            background: rgba(15, 157, 110, 0.1);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            letter-spacing: 0.02em;
        }
        .badge-accent {
            display: inline-block;
            background: rgba(255, 107, 53, 0.12);
            color: #D9531F;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border: 1px solid var(--color-line);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .faq-item.active {
            box-shadow: var(--shadow-card);
            border-color: rgba(15, 157, 110, 0.4);
        }
        .faq-question {
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-ink);
            transition: color var(--transition-base);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            background: rgba(15, 157, 110, 0.1);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 400;
            transition: transform var(--transition-base), background var(--transition-base);
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 400ms ease;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
        }
        .faq-answer-inner {
            padding: 0 1.5rem 1.5rem;
            color: var(--color-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* Form */
        .form-input {
            width: 100%;
            border-radius: 12px;
            border: 1px solid var(--color-line);
            background: #fff;
            padding: 0.75rem 1rem;
            font-size: 0.9375rem;
            color: var(--color-ink);
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .form-input:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(15, 157, 110, 0.18);
        }
        .form-input::placeholder {
            color: #A8A49B;
        }

        /* Fixed Nav */
        #fixedNav {
            transform: translateY(-100%);
            opacity: 0;
            pointer-events: none;
            transition: transform 450ms ease, opacity 300ms ease;
        }
        #fixedNav.visible {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        /* Float CTA */
        #floatCta {
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: opacity 400ms ease, transform 400ms ease;
        }
        #floatCta.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        /* Mobile Drawer */
        #mobileDrawer {
            transition: transform 400ms cubic-bezier(0.22, 1, 0.36, 1);
        }
        #mobileDrawer.open {
            transform: translateX(0);
        }

        /* Hero decoration */
        .hero-arc {
            position: absolute;
            bottom: 60px;
            right: 40px;
            width: 180px;
            height: 180px;
            border: 2px solid rgba(15, 157, 110, 0.5);
            border-radius: 50%;
            border-top-color: transparent;
            border-right-color: transparent;
            transform: rotate(20deg);
        }
        .hero-angle {
            position: absolute;
            bottom: 0;
            right: 0;
            width: 0;
            height: 0;
            border-style: solid;
            border-width: 0 0 140px 140px;
            border-color: transparent transparent rgba(15, 157, 110, 0.25) transparent;
        }

        /* Advantage number */
        .adv-item {
            position: relative;
            padding-left: 2.75rem;
            transition: background var(--transition-base);
        }
        .adv-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.5rem;
            width: 4px;
            height: 100%;
            min-height: 3.5rem;
            background: var(--color-primary);
            border-radius: 9999px;
        }
        .adv-number {
            position: absolute;
            left: 0.75rem;
            top: 0;
            font-size: 0.75rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.06em;
        }

        /* Evidence number */
        .evidence-num {
            font-size: 3rem;
            line-height: 1;
            font-weight: 900;
            color: var(--color-gold);
        }
        @media (min-width: 768px) {
            .evidence-num {
                font-size: 3.75rem;
            }
        }

        /* Plan card */
        .plan-card {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--color-line);
            padding: 2rem 2rem 2.5rem;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .plan-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 44px rgba(0, 0, 0, 0.1);
        }
        .plan-card.featured {
            border: 2px solid var(--color-primary);
            box-shadow: 0 12px 36px rgba(15, 157, 110, 0.18);
            position: relative;
        }
        .plan-card.featured::before {
            content: '推荐方案';
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 1rem;
            border-radius: 9999px;
            white-space: nowrap;
        }

        /* Footer */
        .footer-link {
            color: rgba(247, 245, 240, 0.65);
            font-size: 0.875rem;
            transition: color var(--transition-base), padding-left var(--transition-base);
        }
        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }

        /* Custom scrollbar */
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: #F0EEE8;
        }
        ::-webkit-scrollbar-thumb {
            background: #C9C5BA;
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #A8A49B;
        }

/* roulang page: article */
:root {
            --color-primary: #0F9D6E;
            --color-accent: #FF6B35;
            --color-ink: #171714;
            --color-paper: #F7F5F0;
            --color-forest: #0B7A54;
            --radius-card: 16px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
            --transition-base: all .3s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background-color: var(--color-paper);
            color: #1F1E1B;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        .footer-link {
            color: rgba(255, 255, 255, 0.55);
            transition: color .3s ease;
        }
        .footer-link:hover {
            color: #fff;
        }

        .card-hover {
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.10);
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            transition: all .3s ease;
        }
        .btn-primary:hover {
            background-color: var(--color-forest);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
            transition: all .3s ease;
        }
        .btn-accent:hover {
            background-color: #E85A2A;
            transform: translateY(-1px);
        }
        .btn-accent:active {
            transform: translateY(0);
        }

        .btn-outline-white {
            border: 1px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            transition: all .3s ease;
        }
        .btn-outline-white:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .service-point {
            position: relative;
            padding-left: 22px;
        }
        .service-point::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            background-color: var(--color-primary);
            border-radius: 50%;
        }

        /* 移动端菜单 */
        #mobileMenu {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        #mobileMenu.open {
            max-height: 360px;
        }

        @media (min-width: 1024px) {
            .hero-title {
                font-size: 3.5rem;
                line-height: 1.1;
            }
        }

        @media (max-width: 1023px) {
            .hero-title {
                font-size: 2.75rem;
                line-height: 1.15;
            }
        }

        @media (max-width: 640px) {
            .hero-title {
                font-size: 2.25rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0F9D6E;
            --color-accent: #FF6B35;
            --color-ink: #171714;
            --color-paper: #F7F5F0;
            --color-forest: #0B7A54;
            --radius-card: 16px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
            --transition-base: 300ms ease;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: #F7F5F0;
            color: #1F1E1B;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 80rem;
            margin-inline: auto;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #0F9D6E;
            color: #fff;
            font-weight: 600;
            border-radius: 9999px;
            padding: 0.75rem 1.5rem;
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: #0B7A54;
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            font-weight: 600;
            border-radius: 9999px;
            padding: 0.75rem 1.5rem;
            transition: all var(--transition-base);
            background: transparent;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }
        .card-hover {
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.10);
        }
        .nav-link {
            position: relative;
            transition: color var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 0;
            height: 2px;
            background: #0F9D6E;
            transition: width var(--transition-base);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .section-padding {
            padding: 5rem 0;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding: 7rem 0;
            }
        }
        .input-field {
            width: 100%;
            border-radius: 12px;
            border: 1px solid #E7E3DA;
            background: #fff;
            padding: 0.75rem 1rem;
            font-size: 0.9375rem;
            color: #1F1E1B;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            outline: none;
        }
        .input-field:focus {
            border-color: #0F9D6E;
            box-shadow: 0 0 0 3px rgba(15, 157, 110, 0.2);
        }
        .faq-item {
            background: #fff;
            border: 1px solid #E7E3DA;
            border-radius: 16px;
            overflow: hidden;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .faq-item.open {
            border-color: #0F9D6E;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item.open .faq-content {
            max-height: 400px;
        }
        .faq-icon {
            transition: transform 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 9999px;
            background: #F7F5F0;
            color: #0F9D6E;
            font-size: 1.25rem;
            font-weight: 600;
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            transform: rotate(135deg);
            background: #0F9D6E;
            color: #fff;
        }
        .hero-img-wrap {
            position: relative;
            overflow: hidden;
        }
        .hero-img-wrap::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 60%;
            background: linear-gradient(to top, rgba(23, 23, 20, 0.85), transparent);
            pointer-events: none;
        }
        .clip-slant {
            clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
        }
        .deco-arc {
            position: absolute;
            right: -6rem;
            top: -4rem;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            border: 2px solid rgba(15, 157, 110, 0.25);
            pointer-events: none;
        }
        .deco-arc::before {
            content: '';
            position: absolute;
            right: 3rem;
            top: 3rem;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 1px solid rgba(255, 107, 53, 0.2);
        }
        .data-number {
            font-weight: 900;
            color: #F5B942;
            line-height: 1.1;
            font-size: clamp(2.5rem, 5vw, 3.75rem);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-base);
        }
        .footer-link:hover {
            color: #0F9D6E;
        }
        .scene-img {
            transition: transform 0.5s ease;
        }
        .scene-card:hover .scene-img {
            transform: scale(1.04);
        }
        .gallery-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border-radius: 9999px;
            background: rgba(15, 157, 110, 0.08);
            border: 1px solid rgba(15, 157, 110, 0.2);
            color: #0B7A54;
            font-size: 0.8125rem;
            font-weight: 500;
            padding: 0.375rem 0.875rem;
        }
        .dots-pattern {
            background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
            background-size: 18px 18px;
        }
        .scroll-top-cta {
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.4s ease;
            z-index: 90;
        }
        .scroll-top-cta.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: inline-flex;
            }
        }
        @media (min-width: 1024px) {
            .mobile-toggle {
                display: none;
            }
        }
        .mobile-panel {
            display: none;
        }
        .mobile-panel.open {
            display: block;
        }