/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --deep-green: #0f2925;
            --mid-green: #1d4038;
            --coral: #ff6a3d;
            --coral-hover: #e8552c;
            --warm-white: #f7f5f1;
            --white: #ffffff;
            --text-dark: #1c2020;
            --text-muted: #6a736f;
            --border-line: #e6e6e3;
            --tag-bg: #e8f0ed;
            --tag-text: #0f2925;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 999px;
            --shadow-sm: 0 6px 24px rgba(15,41,37,.08);
            --shadow-lg: 0 10px 32px rgba(15,41,37,.14);
            --font-stack: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6rem);
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-stack);
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-dark);
            background: var(--white);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--deep-green);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--coral);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-pad) 0;
        }

        /* ========== 导航栏 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .96);
            border-bottom: 1px solid rgba(0, 0, 0, .06);
            transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
        }

        .site-header.nav-scrolled {
            background: rgba(15, 41, 37, .88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom-color: transparent;
            box-shadow: 0 6px 24px rgba(15, 41, 37, .12);
        }

        .site-header .navbar {
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
        }

        .site-header .navbar-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--deep-green);
            letter-spacing: .02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .site-header.nav-scrolled .navbar-brand {
            color: #ffffff;
        }

        .brand-mark {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--coral);
            display: inline-block;
            position: relative;
            flex-shrink: 0;
        }

        .brand-mark::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            border: 2px solid var(--coral);
            border-radius: 50%;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            opacity: .4;
        }

        .site-header .navbar-nav {
            gap: 4px;
        }

        .site-header .nav-link {
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-dark);
            padding: 24px 18px !important;
            position: relative;
            letter-spacing: .01em;
        }

        .site-header.nav-scrolled .nav-link {
            color: #e8efec;
        }

        .site-header .nav-link:hover {
            color: var(--coral);
        }

        .site-header.nav-scrolled .nav-link:hover {
            color: var(--coral);
        }

        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 12px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--coral);
            border-radius: 2px;
        }

        .site-header .btn-nav {
            margin-left: 20px;
            font-weight: 500;
            font-size: .9rem;
            padding: .5rem 1.4rem;
            white-space: nowrap;
        }

        .navbar-toggler {
            border: none;
            padding: 8px;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        .navbar-toggler .toggler-icon {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--deep-green);
            margin: 5px 0;
            transition: background .3s ease;
        }

        .site-header.nav-scrolled .navbar-toggler .toggler-icon {
            background: #ffffff;
        }

        @media (max-width: 991px) {
            .site-header .navbar-collapse {
                background: var(--white);
                border-radius: 12px;
                box-shadow: var(--shadow-lg);
                margin-top: 10px;
                padding: 16px 20px;
            }

            .site-header.nav-scrolled .navbar-collapse {
                background: rgba(15, 41, 37, .96);
            }

            .site-header .nav-link {
                padding: 12px 8px !important;
                border-bottom: 1px solid rgba(0, 0, 0, .04);
            }

            .site-header.nav-scrolled .nav-link {
                border-bottom-color: rgba(255, 255, 255, .08);
            }

            .site-header .nav-link.active::after {
                display: none;
            }

            .site-header .btn-nav {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
        }

        /* ========== 按钮 ========== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary {
            background: var(--coral);
            border-color: var(--coral);
            color: #ffffff;
        }

        .btn-primary:hover {
            background: var(--coral-hover);
            border-color: var(--coral-hover);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 106, 61, .35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline-light-custom {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, .85);
            color: #ffffff;
            border-radius: var(--radius-btn);
            font-weight: 500;
        }

        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-2px);
        }

        .btn-lg {
            min-height: 48px;
            padding: .6rem 2rem;
        }

        .btn-brand-outline {
            background: transparent;
            border: 1.5px solid var(--mid-green);
            color: var(--deep-green);
            font-weight: 500;
        }

        .btn-brand-outline:hover {
            background: rgba(15, 41, 37, .06);
            border-color: var(--deep-green);
            color: var(--deep-green);
            transform: translateY(-2px);
        }

        /* ========== Hero ========== */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--deep-green);
            padding-top: 72px;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: .38;
            z-index: 1;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 41, 37, .95) 0%, rgba(15, 41, 37, .82) 45%, rgba(29, 64, 56, .62) 100%);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 5;
            padding-top: 3rem;
            padding-bottom: 3rem;
        }

        .hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            border-radius: 999px;
            padding: 5px 18px;
            font-size: .82rem;
            color: rgba(255, 255, 255, .9);
            margin-bottom: 24px;
            letter-spacing: .03em;
        }

        .hero .hero-badge i {
            font-size: .5rem;
            color: var(--coral);
        }

        .hero h1 {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            font-weight: 700;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 18px;
            letter-spacing: .01em;
        }

        .hero .hero-subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, .82);
            max-width: 480px;
            margin-bottom: 32px;
            line-height: 1.7;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-info-card {
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: 20px;
            backdrop-filter: blur(8px);
            padding: 36px 32px;
            margin-left: auto;
            max-width: 340px;
        }

        .hero-info-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
        }

        .hero-info-item:last-child {
            border-bottom: none;
        }

        .hero-info-label {
            font-size: .9rem;
            color: rgba(255, 255, 255, .74);
        }

        .hero-info-value {
            font-size: 1.1rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: .02em;
        }

        @media (max-width: 991px) {
            .hero {
                min-height: 0;
                padding-top: 72px;
                padding-bottom: 2rem;
            }

            .hero-content {
                text-align: center;
                padding-top: 3.5rem;
                padding-bottom: 2rem;
            }

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

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

            .hero-info-card {
                margin: 2rem auto 0;
            }
        }

        /* ========== 板块通用标题 ========== */
        .section-head {
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: clamp(1.8rem, 3.2vw, 2.4rem);
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-dark);
            letter-spacing: .01em;
        }

        .section-head p {
            font-size: .98rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-head.text-left {
            text-align: left;
        }

        .section-head.text-left p {
            margin-left: 0;
        }

        /* ========== 三步流程 ========== */
        .steps-section {
            background: var(--white);
        }

        .steps-row {
            position: relative;
            display: flex;
            gap: 0;
        }

        .step-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 36px 30px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-line);
            height: 100%;
            transition: box-shadow .3s ease, transform .3s ease;
            position: relative;
        }

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

        .step-num {
            display: inline-flex;
            font-size: 2.6rem;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--coral);
            line-height: 1;
            margin-bottom: 16px;
            letter-spacing: -.02em;
        }

        .step-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--tag-bg);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--deep-green);
            font-size: 1.2rem;
        }

        .step-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .step-card p {
            font-size: .9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .step-arrow {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: 24px;
            padding-bottom: 24px;
            font-size: 1.4rem;
            color: var(--coral);
        }

        .step-arrow::before {
            content: '→';
            font-size: 1.6rem;
            color: var(--border-line);
            transition: color .3s;
        }

        .step-arrow:hover::before {
            color: var(--coral);
        }

        @media (max-width: 991px) {
            .steps-row {
                row-gap: 24px;
            }

            .step-arrow {
                padding: 8px 0;
            }

            .step-arrow::before {
                content: '↓';
                font-size: 1.4rem;
            }
        }

        @media (max-width: 767px) {
            .step-card {
                padding: 28px 20px;
            }

            .step-arrow {
                display: none;
            }
        }

        /* ========== 案例证明 ========== */
        .cases-section {
            background: var(--warm-white);
        }

        .stats-bar {
            background: var(--deep-green);
            border-radius: 20px;
            padding: 32px 40px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 56px;
            background: linear-gradient(110deg, var(--deep-green) 0%, var(--mid-green) 100%);
        }

        .stat-item {
            text-align: center;
            flex: 1;
            min-width: 140px;
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--coral);
            line-height: 1.2;
        }

        .stat-label {
            font-size: .85rem;
            color: rgba(255, 255, 255, .72);
            margin-top: 6px;
        }

        .case-row {
            display: flex;
            align-items: center;
            gap: 40px;
            margin-bottom: 56px;
        }

        .case-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .case-img {
            flex: 0 0 46%;
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .case-img img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            display: block;
            transition: transform .4s ease;
        }

        .case-img:hover img {
            transform: scale(1.03);
        }

        .case-content {
            flex: 1;
        }

        .case-content .case-tag {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: .78rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 12px;
        }

        .case-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .case-content p {
            font-size: .95rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .case-result {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .case-result-item {
            font-size: .9rem;
            color: var(--text-dark);
            background: var(--white);
            border-radius: 10px;
            padding: 8px 16px;
            box-shadow: 0 2px 8px rgba(15, 41, 37, .05);
            border-left: 3px solid var(--coral);
        }

        @media (max-width: 991px) {
            .case-row,
            .case-row:nth-child(even) {
                flex-direction: column;
                gap: 24px;
            }

            .case-img {
                flex: none;
                width: 100%;
            }

            .case-img img {
                height: 220px;
            }

            .stats-bar {
                padding: 24px 20px;
                flex-direction: column;
                gap: 16px;
            }

            .stat-item {
                min-width: 100%;
                text-align: left;
                display: flex;
                align-items: baseline;
                gap: 12px;
                justify-content: center;
            }
        }

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

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

        .faq-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-line);
            border-radius: 0;
            margin-bottom: 0;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border-line);
        }

        .faq-item .accordion-button {
            background: transparent;
            box-shadow: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-dark);
            padding: 22px 16px;
            padding-right: 48px;
            position: relative;
            transition: color .2s ease;
        }

        .faq-item .accordion-button:hover {
            color: var(--coral);
        }

        .faq-item .accordion-button:not(.collapsed) {
            color: var(--deep-green);
            background: transparent;
        }

        .faq-item .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            color: var(--text-muted);
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            transition: transform .25s ease, color .2s ease;
            width: auto;
            height: auto;
        }

        .faq-item .accordion-button:not(.collapsed)::after {
            transform: translateY(-50%) rotate(45deg);
            color: var(--coral);
        }

        .faq-item .accordion-body {
            padding: 0 16px 22px;
            font-size: .95rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ========== 资讯动态 ========== */
        .news-section {
            background: var(--white);
        }

        .news-card {
            display: block;
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-line);
            overflow: hidden;
            height: 100%;
            transition: box-shadow .3s ease, transform .3s ease;
        }

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

        .news-cover {
            border-radius: 0;
            overflow: hidden;
            position: relative;
            aspect-ratio: 16/10;
        }

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

        .news-card:hover .news-cover img {
            transform: scale(1.03);
        }

        .news-body {
            padding: 24px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .news-meta .tag {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: .75rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 3px 12px;
        }

        .news-time {
            font-size: .85rem;
            color: var(--text-muted);
        }

        .news-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
            transition: color .2s ease;
        }

        .news-card:hover .news-body h3 {
            color: var(--coral);
        }

        .news-body p {
            font-size: .88rem;
            color: var(--text-muted);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }

        .empty-tip {
            text-align: center;
            color: var(--text-muted);
            font-size: .95rem;
            padding: 40px 0 20px;
        }

        /* ========== CTA 立即开通 ========== */
        .cta-section {
            background: linear-gradient(110deg, var(--deep-green) 0%, var(--mid-green) 100%);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .06);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .04);
        }

        .cta-section .section-head h2 {
            color: #ffffff;
        }

        .cta-section .section-head p {
            color: rgba(255, 255, 255, .68);
        }

        .cta-form {
            max-width: 680px;
            margin: 0 auto 32px;
        }

        .cta-form .form-control,
        .cta-form .form-select {
            height: 46px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .18);
            background: rgba(255, 255, 255, .08);
            color: #ffffff;
            font-size: .92rem;
            padding: 10px 18px;
            transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
        }

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

        .cta-form .form-control:focus,
        .cta-form .form-select:focus {
            background: rgba(255, 255, 255, .12);
            border-color: var(--coral);
            box-shadow: 0 0 0 3px rgba(255, 106, 61, .18);
            color: #ffffff;
        }

        .cta-form .form-select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='rgba(255,255,255,.6)'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            background-size: 12px;
            appearance: none;
            -webkit-appearance: none;
        }

        .cta-form .form-select option {
            color: var(--text-dark);
            background: var(--white);
        }

        .cta-form .form-label {
            font-size: .88rem;
            font-weight: 500;
            color: rgba(255, 255, 255, .72);
            margin-bottom: 6px;
        }

        .cta-note {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            max-width: 720px;
            margin: 0 auto;
            color: rgba(255, 255, 255, .6);
            font-size: .9rem;
            padding-top: 12px;
        }

        .cta-note span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .cta-note i {
            color: var(--coral);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--deep-green);
            color: #cfd8d5;
            padding: 64px 0 32px;
            font-size: .9rem;
        }

        .site-footer .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

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

        .site-footer p {
            color: #9fb0ab;
            line-height: 1.7;
            font-size: .88rem;
        }

        .site-footer h5 {
            font-size: .95rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 20px;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul a {
            color: #9fb0ab;
            font-size: .88rem;
            transition: color .2s ease, padding-left .2s ease;
        }

        .site-footer ul a:hover {
            color: var(--coral);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 24px;
            margin-top: 48px;
            color: #7d8f8a;
            font-size: .82rem;
            text-align: center;
        }

        @media (max-width: 767px) {
            .site-footer {
                padding: 48px 0 24px;
            }

            .site-footer .col-md-6,
            .site-footer .col-lg-3 {
                margin-bottom: 32px;
            }
        }

        /* ========== 动画小工具 ========== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity .5s ease, transform .5s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== 自定义滚动条 ========== */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--warm-white);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--mid-green);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--deep-green);
        }

        :focus-visible {
            outline: 2px solid var(--coral);
            outline-offset: 2px;
        }

/* roulang page: category1 */
:root {
            --primary: #0f2925;
            --primary-light: #1d4038;
            --accent: #ff6a3d;
            --accent-hover: #e8552c;
            --bg-warm: #f7f5f1;
            --white: #ffffff;
            --text-main: #1c2020;
            --text-muted: #6a736f;
            --border-color: #e6e6e3;
            --tag-bg: #e8f0ed;
            --tag-text: #1d4038;
            --card-radius: 16px;
            --img-radius: 12px;
            --btn-radius: 999px;
            --input-radius: 10px;
            --shadow-sm: 0 6px 24px rgba(15, 41, 37, .08);
            --shadow-hover: 0 10px 32px rgba(15, 41, 37, .14);
            --container-pad: 24px;
            --section-pad: clamp(3.5rem, 7vw, 6rem);
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            color: var(--text-main);
            background: var(--white);
            line-height: 1.8;
            font-size: 1rem;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            height: 72px;
            background: rgba(255, 255, 255, .95);
            z-index: 1030;
            border-bottom: 1px solid var(--border-color);
            transition: background .3s ease, box-shadow .3s ease;
        }

        .site-header.scrolled {
            background: rgba(15, 41, 37, .88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 24px rgba(15, 41, 37, .15);
        }

        .site-header.scrolled .nav-link,
        .site-header.scrolled .navbar-brand {
            color: #fff;
        }

        .site-header.scrolled .nav-link:hover {
            color: var(--accent);
        }

        .site-header.scrolled .nav-link.active::after {
            background: var(--accent);
        }

        .site-header.scrolled .btn-nav {
            background: var(--accent);
            color: #fff;
        }

        .navbar {
            height: 72px;
            padding: 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: .5px;
            padding: 0;
        }

        .brand-mark {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
            position: relative;
            flex-shrink: 0;
            box-shadow: 0 2px 10px rgba(255, 106, 61, .35);
        }

        .brand-mark::after {
            content: "";
            position: absolute;
            top: 7px;
            left: 8px;
            width: 12px;
            height: 6px;
            border-bottom: 2px solid #fff;
            border-radius: 50%;
        }

        .navbar-nav {
            gap: 8px;
            margin-left: auto;
            align-items: center;
        }

        .nav-item {
            display: flex;
            align-items: center;
        }

        .nav-link {
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-main);
            padding: .5rem .5rem !important;
            margin: 0 14px;
            position: relative;
            white-space: nowrap;
            transition: color .2s ease;
        }

        .nav-link:hover {
            color: var(--accent);
        }

        .nav-link.active {
            color: var(--accent);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }

        .btn-nav {
            margin-left: 18px;
            height: 40px;
            padding: 0 24px;
            font-size: .9rem;
            border-radius: var(--btn-radius);
            background: var(--primary);
            color: #fff;
            border: none;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            transition: all .25s ease;
        }

        .btn-nav:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 106, 61, .3);
        }

        .btn-nav:active {
            transform: translateY(0);
        }

        .navbar-toggler {
            border: none;
            padding: 6px;
            width: 42px;
            height: 42px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            align-items: center;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            border-radius: 8px;
        }

        .toggler-icon {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            display: block;
            transition: background .2s;
        }

        .site-header.scrolled .toggler-icon {
            background: #fff;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: #fff;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                padding: 20px 24px 28px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 16px 32px rgba(15, 41, 37, .1);
                border-radius: 0 0 16px 16px;
            }

            .site-header.scrolled .navbar-collapse {
                background: var(--primary);
            }

            .site-header.scrolled .navbar-collapse .nav-link {
                color: #fff;
            }

            .navbar-nav {
                gap: 0;
                margin-left: 0;
                margin-bottom: 14px;
            }

            .nav-link {
                margin: 0;
                padding: 12px 0 !important;
                font-size: 1rem;
                border-bottom: 1px solid rgba(230, 230, 227, .3);
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-link.active {
                color: var(--accent);
            }

            .btn-nav {
                margin-left: 0;
                width: 100%;
                justify-content: center;
                height: 46px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border-color);
            padding: 88px 0 0;
        }

        .breadcrumb-wrap .container {
            padding-top: 18px;
            padding-bottom: 18px;
        }

        .breadcrumb {
            margin: 0;
            background: transparent;
            padding: 0;
            font-size: .85rem;
        }

        .breadcrumb-item a {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb-item a:hover {
            color: var(--accent);
        }

        .breadcrumb-item.active {
            color: var(--text-muted);
        }

        .breadcrumb-item + .breadcrumb-item::before {
            content: "/";
            color: #b5bdb9;
            padding: 0 8px;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
            overflow: hidden;
        }

        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 41, 37, .95) 0%, rgba(29, 64, 56, .82) 55%, rgba(15, 41, 37, .6) 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-content {
            max-width: 700px;
            text-align: left;
        }

        .banner-content h1 {
            color: #fff;
            font-size: clamp(2rem, 4.2vw, 3rem);
            font-weight: 700;
            line-height: 1.25;
            margin: 0 0 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, .25);
        }

        .banner-content p {
            color: rgba(255, 255, 255, .9);
            font-size: 1.05rem;
            line-height: 1.7;
            margin: 0;
            max-width: 520px;
        }

        .banner-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 22px;
        }

        .banner-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            border-radius: 999px;
            color: #fff;
            font-size: .8rem;
            letter-spacing: .3px;
        }

        /* ===== Intro / Overview ===== */
        .intro-section {
            background: #fff;
            padding-top: calc(var(--section-pad) * 0.8);
            padding-bottom: calc(var(--section-pad) * 0.8);
        }

        .intro-card {
            background: var(--bg-warm);
            border-radius: var(--card-radius);
            padding: 36px 40px;
            display: flex;
            gap: 28px;
            align-items: flex-start;
            border: 1px solid var(--border-color);
        }

        .intro-icon {
            width: 52px;
            height: 52px;
            flex-shrink: 0;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.2rem;
        }

        .intro-card p {
            margin: 0;
            color: var(--text-main);
            font-size: 1rem;
            line-height: 1.8;
        }

        /* ===== Alternate Feature Rows ===== */
        .alt-features {
            background: #fff;
        }

        .alt-row {
            display: flex;
            align-items: center;
            gap: 60px;
            padding: 50px 0;
        }

        .alt-row:nth-child(even) .alt-media {
            order: 1;
        }

        .alt-row:nth-child(even) .alt-content {
            order: 2;
        }

        .alt-media {
            flex: 0 0 48%;
            position: relative;
            overflow: hidden;
            border-radius: var(--img-radius);
            box-shadow: var(--shadow-sm);
        }

        .alt-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .alt-media:hover img {
            transform: scale(1.03);
        }

        .alt-content {
            flex: 1;
        }

        .alt-content .step-tag {
            display: inline-block;
            font-size: .8rem;
            font-weight: 600;
            background: var(--tag-bg);
            color: var(--tag-text);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }

        .alt-content h3 {
            font-size: 1.6rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .alt-content p {
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.8;
        }

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

        .alt-list li {
            position: relative;
            padding-left: 24px;
            color: var(--text-muted);
            font-size: .95rem;
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .alt-list li::before {
            content: "\f058";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 1px;
            color: var(--accent);
            font-size: .8rem;
        }

        /* ===== Scenario Matrix ===== */
        .scenario-section {
            background: var(--bg-warm);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head .sub-title {
            display: inline-block;
            font-size: .85rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-head h2 {
            font-size: clamp(1.8rem, 3.2vw, 2.4rem);
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .section-head p {
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            font-size: .98rem;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-item {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 30px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
        }

        .scenario-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-item .scen-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--tag-bg);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 18px;
            transition: all .3s ease;
        }

        .scenario-item:hover .scen-icon {
            background: var(--primary);
            color: var(--accent);
        }

        .scenario-item h4 {
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .scenario-item p {
            color: var(--text-muted);
            font-size: .88rem;
            margin: 0;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            transition: border-color .2s ease;
        }

        .faq-item:last-child {
            border-bottom: 1px solid var(--border-color);
        }

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            cursor: pointer;
            padding: 6px 0;
        }

        .faq-q h3,
        .faq-q .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0;
            flex: 1;
            line-height: 1.5;
        }

        .faq-q .faq-toggle {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--tag-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: .9rem;
            font-weight: 400;
            transition: all .25s ease;
        }

        .faq-item.open .faq-toggle {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .3s ease;
            padding: 0;
        }

        .faq-item.open .faq-a {
            max-height: 500px;
            padding-top: 14px;
            padding-right: 40px;
        }

        .faq-item .faq-a p {
            margin: 0;
            color: var(--text-muted);
            font-size: .95rem;
            line-height: 1.8;
        }

        /* ===== CTA Strip ===== */
        .cta-strip {
            background: var(--primary);
            position: relative;
            overflow: hidden;
            padding: 48px 0;
        }

        .cta-strip::before {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 106, 61, .12);
            top: -80px;
            right: 10%;
        }

        .cta-strip::after {
            content: "";
            position: absolute;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
            bottom: -50px;
            left: 8%;
        }

        .cta-strip .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-strip h2 {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .cta-strip p {
            color: rgba(255, 255, 255, .75);
            margin: 0;
            font-size: .95rem;
        }

        .cta-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--accent) !important;
            font-size: 1rem;
            font-weight: 600;
            padding: 12px 0;
            transition: gap .25s ease;
        }

        .cta-link:hover {
            gap: 16px;
            color: #fff !important;
        }

        .cta-link i {
            font-size: .85rem;
            transition: transform .25s ease;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, .75);
            padding-top: 60px;
            font-size: .9rem;
        }

        .site-footer .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-mark {
            width: 26px;
            height: 26px;
        }

        .site-footer p {
            color: #cfd8d5;
            line-height: 1.8;
            margin-bottom: 12px;
            max-width: 360px;
        }

        .site-footer h5 {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer h5::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .site-footer ul li a {
            color: #cfd8d5;
            font-size: .9rem;
            transition: color .2s ease, padding-left .2s ease;
        }

        .site-footer ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            margin-top: 40px;
            padding: 18px 0;
            text-align: center;
        }

        .footer-bottom p {
            margin: 0;
            font-size: .82rem;
            color: rgba(255, 255, 255, .5);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .page-banner {
                padding: 140px 0 60px;
            }

            .banner-content h1 {
                font-size: 2rem;
            }

            .alt-row {
                flex-direction: column !important;
                gap: 28px;
                padding: 36px 0;
            }

            .alt-row:nth-child(even) .alt-media {
                order: 0 !important;
            }

            .alt-row:nth-child(even) .alt-content {
                order: 0 !important;
            }

            .alt-media {
                flex: 0 0 100%;
                width: 100%;
            }

            .alt-media img {
                height: 260px;
            }

            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .cta-strip .container {
                justify-content: center;
                text-align: center;
            }

            .cta-link {
                justify-content: center;
            }
        }

        @media (max-width: 767px) {
            .breadcrumb-wrap {
                padding-top: 72px;
            }

            .page-banner {
                padding: 110px 0 50px;
            }

            .banner-content {
                text-align: center;
                margin: 0 auto;
            }

            .banner-content p {
                margin: 0 auto;
            }

            .banner-badge-row {
                justify-content: center;
            }

            .intro-card {
                flex-direction: column;
                padding: 28px 20px;
                gap: 16px;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .faq-item.open .faq-a {
                padding-right: 0;
            }

            .alt-media img {
                height: 220px;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1rem;
                gap: 8px;
            }

            .brand-mark {
                width: 24px;
                height: 24px;
            }

            .alt-content h3 {
                font-size: 1.3rem;
            }

            .alt-list li {
                font-size: .9rem;
            }

            .footer-bottom p {
                font-size: .78rem;
                line-height: 1.5;
                padding: 0 12px;
            }

            .site-footer ul li {
                font-size: .85rem;
            }
        }

        /* ===== Focus visibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(255, 106, 61, .5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .nav-link:focus-visible {
            outline-offset: 4px;
        }

/* roulang page: article */
:root {
    --primary: #0f2925;
    --primary-light: #1d4038;
    --primary-lighter: #2a5a4f;
    --accent: #ff6a3d;
    --accent-hover: #e8552c;
    --warm-white: #f7f5f1;
    --white: #ffffff;
    --text: #1c2020;
    --text-light: #6a736f;
    --border: #e6e6e3;
    --tag-bg: #e8f0ed;
    --tag-text: #1d4038;
    --radius-card: 16px;
    --radius-img: 12px;
    --radius-btn: 999px;
    --radius-input: 10px;
    --shadow-card: 0 6px 24px rgba(15, 41, 37, .08);
    --shadow-card-hover: 0 10px 32px rgba(15, 41, 37, .14);
    --shadow-btn: 0 4px 16px rgba(255, 106, 61, .28);
    --transition: all .25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
    max-width: 1200px;
    padding-left: 24px;
    padding-right: 24px;
}

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(15, 41, 37, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: rgba(255, 255, 255, .08);
    box-shadow: 0 4px 30px rgba(15, 41, 37, .25);
}

.site-header .navbar {
    height: 72px;
    padding: 0;
}

.site-header .navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: .02em;
}

.site-header.scrolled .navbar-brand {
    color: #fff;
}

.brand-mark {
    display: inline-block;
    width: 28px;
    height: 28px;
    margin-right: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, #ff8f5e 100%);
    position: relative;
    flex-shrink: 0;
}

.brand-mark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    opacity: .35;
}

.site-header .navbar-nav {
    gap: 8px;
    margin-right: 24px;
}

.site-header .nav-link {
    font-size: .95rem;
    font-weight: 500;
    color: var(--text);
    padding: 8px 16px;
    border-radius: 8px;
    position: relative;
    transition: var(--transition);
}

.site-header .nav-link:hover {
    color: var(--accent);
    background: rgba(255, 106, 61, .06);
}

.site-header .nav-link.active {
    color: var(--primary);
    font-weight: 600;
}

.site-header .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: var(--accent);
}

.site-header.scrolled .nav-link {
    color: #cfd8d5;
}

.site-header.scrolled .nav-link:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, .06);
}

.site-header.scrolled .nav-link.active {
    color: #fff;
}

.btn-nav {
    height: 40px;
    padding: 0 24px;
    font-size: .9rem;
    font-weight: 600;
    border-radius: var(--radius-btn);
    background: var(--accent);
    color: #fff;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    box-shadow: var(--shadow-btn);
}

.btn-nav:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 106, 61, .35);
}

.btn-nav:active {
    transform: translateY(0);
}

.navbar-toggler {
    border: none;
    padding: 8px;
    background: transparent;
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
}

.toggler-icon {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.site-header.scrolled .toggler-icon {
    background: #fff;
}

@media (max-width: 991.98px) {
    .site-header .navbar-collapse {
        background: var(--white);
        border-radius: 16px;
        padding: 20px;
        margin-top: 12px;
        box-shadow: 0 12px 40px rgba(15, 41, 37, .15);
        border: 1px solid var(--border);
    }
    .site-header.scrolled .navbar-collapse {
        background: var(--primary);
        border-color: rgba(255, 255, 255, .1);
    }
    .site-header .navbar-nav {
        gap: 4px;
        margin-right: 0;
        margin-bottom: 16px;
    }
    .site-header .nav-link {
        padding: 10px 14px;
        border-radius: 10px;
    }
    .site-header .nav-link.active::after {
        display: none;
    }
    .site-header .nav-link.active {
        background: rgba(255, 106, 61, .1);
        color: var(--accent);
    }
    .site-header.scrolled .nav-link.active {
        background: rgba(255, 106, 61, .15);
        color: var(--accent);
    }
    .btn-nav {
        width: 100%;
        justify-content: center;
    }
}

/* ---------- Article Hero ---------- */
.article-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 70%, #1a4a40 100%);
    padding: 120px 0 60px;
    position: relative;
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: rgba(255, 106, 61, .12);
    filter: blur(60px);
}

.article-hero::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: 10%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .04);
    filter: blur(40px);
}

.breadcrumb-nav {
    font-size: .85rem;
    color: rgba(255, 255, 255, .6);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.breadcrumb-nav a {
    color: rgba(255, 255, 255, .65);
    transition: var(--transition);
}

.breadcrumb-nav a:hover {
    color: var(--accent);
}

.breadcrumb-nav .sep {
    color: rgba(255, 255, 255, .35);
}

.breadcrumb-nav .current {
    color: rgba(255, 255, 255, .9);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-hero h1 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 700;
    line-height: 1.3;
    color: #fff;
    margin: 0 0 20px;
    position: relative;
    z-index: 1;
    max-width: 860px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    font-size: .85rem;
    color: rgba(255, 255, 255, .65);
    position: relative;
    z-index: 1;
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-meta i {
    color: var(--accent);
    font-size: .8rem;
}

/* ---------- Article Content ---------- */
.article-section {
    padding: 60px 0 40px;
    background: var(--white);
}

.article-content {
    max-width: 780px;
    margin: 0 auto;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text);
}

.article-content p {
    margin-bottom: 1.5em;
    line-height: 1.8;
}

.article-content h2 {
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 600;
    margin: 2em 0 .8em;
    padding-bottom: .4em;
    border-bottom: 1px solid var(--border);
    line-height: 1.4;
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.8em 0 .6em;
    line-height: 1.4;
    color: var(--primary);
}

.article-content h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 1.5em 0 .5em;
}

.article-content ul {
    margin-bottom: 1.5em;
    padding-left: 0;
    list-style: none;
}

.article-content ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: .6em;
}

.article-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: .7em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.article-content ol {
    margin-bottom: 1.5em;
    padding-left: 0;
    list-style: none;
    counter-reset: article-ol;
}

.article-content ol li {
    counter-increment: article-ol;
    position: relative;
    padding-left: 32px;
    margin-bottom: .6em;
}

.article-content ol li::before {
    content: counter(article-ol);
    position: absolute;
    left: 0;
    top: .2em;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: .75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.article-content blockquote {
    border-left: 3px solid var(--accent);
    background: var(--warm-white);
    border-radius: 8px;
    padding: 20px 24px;
    margin: 1.8em 0;
    color: var(--text-light);
    font-style: normal;
}

.article-content blockquote p {
    margin-bottom: 0;
    color: var(--text);
}

.article-content img {
    border-radius: var(--radius-img);
    margin: 1.5em 0;
    display: block;
}

.article-content figure {
    margin: 2em 0;
}

.article-content figure img {
    border-radius: var(--radius-img);
    margin: 0 0 10px;
}

.article-content figcaption {
    font-size: .85rem;
    color: var(--text-light);
    text-align: center;
}

.article-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-content a:hover {
    color: var(--accent-hover);
}

.article-content strong {
    font-weight: 600;
    color: var(--primary);
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5em 0;
}

/* ---------- Tags ---------- */
.article-tags {
    max-width: 780px;
    margin: 0 auto;
    padding-top: 28px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.article-tags .tag-icon {
    color: var(--text-light);
    font-size: .85rem;
    margin-right: 4px;
}

.tag-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: var(--radius-btn);
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: .8rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag-badge:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ---------- Article Not Found ---------- */
.article-not-found {
    text-align: center;
    padding: 60px 20px;
    border-radius: var(--radius-card);
    background: var(--warm-white);
    border: 1px dashed var(--border);
    max-width: 780px;
    margin: 0 auto;
}

.article-not-found i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 16px;
    display: block;
}

.article-not-found h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.article-not-found p {
    color: var(--text-light);
    margin-bottom: 24px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 2.25rem;
    font-size: .95rem;
    font-weight: 600;
    border-radius: var(--radius-btn);
    background: var(--accent);
    color: #fff;
    border: none;
    transition: var(--transition);
    box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 106, 61, .35);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 2.25rem;
    font-size: .95rem;
    font-weight: 600;
    border-radius: var(--radius-btn);
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
    transition: var(--transition);
}

.btn-outline:hover {
    background: rgba(15, 41, 37, .06);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ---------- Related Section ---------- */
.related-section {
    padding: 60px 0 80px;
    background: var(--warm-white);
}

.related-section .section-head {
    text-align: center;
    margin-bottom: 48px;
}

.related-section .section-head h2 {
    font-size: clamp(1.6rem, 2.8vw, 2rem);
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.related-section .section-head p {
    color: var(--text-light);
    font-size: .95rem;
}

.related-card {
    background: var(--white);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.related-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

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

.related-card:hover .related-thumb img {
    transform: scale(1.03);
}

.related-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 41, 37, .25) 0%, transparent 40%);
    opacity: 0;
    transition: var(--transition);
}

.related-card:hover .related-thumb::after {
    opacity: 1;
}

.related-info {
    padding: 20px 22px 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.related-info .cat-label {
    font-size: .75rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.related-info h3 {
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.related-info h3 a {
    color: var(--text);
}

.related-info h3 a:hover {
    color: var(--accent);
}

.related-date {
    font-size: .85rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
}

.related-date i {
    font-size: .75rem;
    color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--primary);
    color: #cfd8d5;
    padding: 64px 0 0;
    font-size: .9rem;
}

.site-footer .footer-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}

.site-footer .footer-brand .brand-mark {
    background: linear-gradient(135deg, var(--accent) 0%, #ff8f5e 100%);
}

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

.site-footer p {
    color: #9db8b2;
    line-height: 1.7;
    font-size: .88rem;
    margin-bottom: 0;
}

.site-footer h5 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: .02em;
}

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

.site-footer ul li {
    margin-bottom: 10px;
    font-size: .88rem;
    color: #9db8b2;
}

.site-footer ul li a {
    color: #9db8b2;
    transition: var(--transition);
}

.site-footer ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    margin-top: 48px;
    padding: 20px 0;
    text-align: center;
    font-size: .82rem;
    color: #6f8a83;
}

.footer-bottom p {
    color: #6f8a83;
    margin-bottom: 0;
    font-size: .82rem;
}

/* ---------- Back to Top ---------- */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 6px 24px rgba(15, 41, 37, .25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-3px);
}

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
    .article-hero {
        padding: 100px 0 48px;
    }
    .related-section {
        padding: 48px 0 60px;
    }
}

@media (max-width: 767.98px) {
    .article-hero {
        padding: 90px 0 40px;
    }
    .article-hero h1 {
        font-size: 1.6rem;
    }
    .article-meta {
        gap: 14px;
        font-size: .8rem;
    }
    .article-section {
        padding: 40px 0 32px;
    }
    .related-section {
        padding: 40px 0 48px;
    }
    .related-info h3 {
        font-size: .95rem;
    }
    .breadcrumb-nav .current {
        max-width: 220px;
    }
    .site-footer {
        padding-top: 48px;
    }
    .site-footer .row>div {
        margin-bottom: 32px;
    }
    .footer-bottom {
        margin-top: 32px;
    }
}

@media (max-width: 575.98px) {
    .breadcrumb-nav {
        font-size: .78rem;
        gap: 6px;
    }
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .article-content {
        font-size: .95rem;
    }
    .related-info {
        padding: 16px 18px 20px;
    }
}