/* roulang page: index */
:root {
            --primary: #FF5A1F;
            --primary-dark: #E84913;
            --accent: #2CE080;
            --dark: #14161A;
            --dark-soft: #1C1F24;
            --light: #F6F5F2;
            --card-bg: #FFFFFF;
            --text-main: #1E2126;
            --text-muted: #6C727C;
            --text-placeholder: #A8AEB8;
            --border: #E8E6E1;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-tag: 6px;
            --radius-img: 12px;
            --shadow-card: 0 2px 8px rgba(20, 22, 26, 0.04);
            --shadow-hover: 0 12px 30px rgba(20, 22, 26, 0.10);
            --shadow-btn: 0 8px 20px rgba(255, 90, 31, 0.30);
            --header-h: 80px;
            --space-lg: 100px;
            --space-md: 80px;
            --space-sm: 56px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            letter-spacing: 0.005em;
            color: var(--text-main);
            background-color: var(--light);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border: none;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 90, 31, 0.40);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 4px 12px rgba(255, 90, 31, 0.25);
        }

        .btn-outline-dark {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-outline-dark:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            color: #fff;
        }

        .btn-outline-light {
            background: transparent;
            border: 1.5px solid rgba(20, 22, 26, 0.35);
            color: var(--text-main);
        }

        .btn-outline-light:hover {
            background: rgba(20, 22, 26, 0.05);
            border-color: var(--text-main);
            color: var(--text-main);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
        }

        .text-primary {
            color: var(--primary) !important;
        }

        /* ====== 导航 ====== */
        .custom-navbar {
            background: rgba(20, 22, 26, 0.96);
            min-height: var(--header-h);
            padding: 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: box-shadow 0.3s ease;
        }

        .custom-navbar .container {
            min-height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .custom-navbar .navbar-brand:hover {
            color: #fff;
        }

        .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            flex-shrink: 0;
        }

        .custom-navbar .navbar-nav {
            gap: 4px;
        }

        .custom-navbar .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 16px;
            font-weight: 500;
            padding: 10px 18px;
            border-radius: 8px;
            transition: color 0.2s, background 0.2s;
            position: relative;
        }

        .custom-navbar .nav-link:hover {
            color: var(--primary);
            background: rgba(255, 90, 31, 0.08);
        }

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

        .custom-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .btn-nav {
            padding: 8px 24px;
            font-size: 14px;
            margin-left: 16px;
        }

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

        .custom-navbar .navbar-toggler-icon {
            background-image: none;
            position: relative;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            display: inline-block;
        }

        .custom-navbar .navbar-toggler-icon::before,
        .custom-navbar .navbar-toggler-icon::after {
            content: '';
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }

        .custom-navbar .navbar-toggler-icon::before {
            top: -7px;
        }

        .custom-navbar .navbar-toggler-icon::after {
            top: 7px;
        }

        /* ====== Hero ====== */
        .hero {
            background: linear-gradient(105deg, rgba(20, 22, 26, 0.94) 0%, rgba(20, 22, 26, 0.78) 45%, rgba(20, 22, 26, 0.35) 100%),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: #fff;
            padding: 140px 0 110px;
            position: relative;
            overflow: hidden;
        }

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

        .hero h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.01em;
            margin-bottom: 20px;
            color: #fff;
            max-width: 640px;
        }

        .hero .hero-sub {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 36px;
            max-width: 460px;
        }

        .hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .hero .trust-note {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero .trust-note i {
            color: var(--accent);
            font-size: 12px;
        }

        .hero-visual {
            position: relative;
            max-width: 460px;
            margin-left: auto;
        }

        .hero-visual img {
            width: 100%;
            border-radius: 20px;
            box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
            position: relative;
            z-index: 2;
        }

        .hero-ring {
            position: absolute;
            top: -28px;
            right: -28px;
            width: 180px;
            height: 180px;
            border: 3px solid var(--primary);
            border-radius: 50%;
            opacity: 0.6;
            z-index: 1;
        }

        .hero-ring::after {
            content: '';
            position: absolute;
            top: 18px;
            right: 18px;
            width: 80px;
            height: 80px;
            border: 2px solid var(--accent);
            border-radius: 50%;
            opacity: 0.4;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 60px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            flex-wrap: wrap;
        }

        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

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

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        .scroll-indicator {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 0.1em;
            z-index: 2;
        }

        .scroll-indicator .line {
            width: 1px;
            height: 40px;
            background: linear-gradient(to bottom, var(--primary), transparent);
            margin-bottom: 8px;
            animation: pulseLine 2s infinite ease-in-out;
        }

        @keyframes pulseLine {
            0%,
            100% {
                opacity: 1;
                transform: scaleY(1);
            }
            50% {
                opacity: 0.4;
                transform: scaleY(0.8);
            }
        }

        /* ====== 板块公用 ====== */
        .section {
            padding: var(--space-lg) 0;
        }

        .section-alt {
            background: #fff;
        }

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

        .section-head h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .section-head .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 560px;
        }

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

        .section-head.center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ====== 热门运动项目 ====== */
        .program-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .program-card .program-img {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
        }

        .program-card .program-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .program-card .program-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(44, 224, 128, 0.92);
            color: #0a2a16;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-tag);
            z-index: 2;
        }

        .program-card .program-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .program-card .program-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .program-card .program-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
        }

        .program-card .program-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .program-card .program-price {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
        }

        .program-card .program-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s, gap 0.2s;
        }

        .program-card .program-link:hover {
            color: var(--primary);
            gap: 8px;
        }

        /* ====== 评价轮播 ====== */
        .testimonial-section {
            background: #fff;
            padding: var(--space-lg) 0;
        }

        .testimonial-card {
            background: var(--light);
            border-radius: var(--radius-card);
            padding: 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .testimonial-card .stars {
            color: #FFB800;
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }

        .testimonial-card .quote-icon {
            font-size: 42px;
            color: var(--primary);
            font-family: Georgia, serif;
            line-height: 1;
            margin-bottom: -8px;
            opacity: 0.4;
        }

        .testimonial-card .quote-text {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-main);
            margin-bottom: 20px;
            flex: 1;
        }

        .testimonial-card .user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .user-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .testimonial-card .user-name {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }

        .testimonial-card .user-tag {
            font-size: 13px;
            color: var(--text-muted);
        }

        .carousel-indicators.testimonial-indicators {
            position: static;
            margin: 32px auto 0;
            gap: 6px;
        }

        .carousel-indicators.testimonial-indicators [data-bs-target] {
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: #d5d5d0;
            border: none;
            opacity: 1;
            transition: background 0.2s;
        }

        .carousel-indicators.testimonial-indicators .active {
            background: var(--accent);
        }

        .testimonial-carousel .carousel-control-prev,
        .testimonial-carousel .carousel-control-next {
            width: 44px;
            height: 44px;
            background: var(--light);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            color: var(--text-main);
        }

        .testimonial-carousel:hover .carousel-control-prev,
        .testimonial-carousel:hover .carousel-control-next {
            opacity: 0.9;
        }

        .testimonial-carousel .carousel-control-prev {
            left: -60px;
        }

        .testimonial-carousel .carousel-control-next {
            right: -60px;
        }

        /* ====== 保障条 ====== */
        .guarantee-section {
            padding: var(--space-md) 0;
        }

        .guarantee-item {
            text-align: center;
            padding: 20px 12px;
        }

        .guarantee-item .g-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 90, 31, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 20px;
            color: var(--primary);
        }

        .guarantee-item .g-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .guarantee-item .g-desc {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ====== CTA 大区 ====== */
        .cta-section {
            background: var(--dark);
            color: #fff;
            padding: var(--space-lg) 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border: 30px solid rgba(255, 90, 31, 0.15);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 10%;
            width: 120px;
            height: 120px;
            border: 2px solid rgba(44, 224, 128, 0.2);
            border-radius: 50%;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-section .cta-title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .cta-section .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 32px;
        }

        /* ====== 资讯列表 ====== */
        .news-section {
            padding: var(--space-lg) 0 0;
        }

        .news-card {
            background: var(--card-bg);
            border-radius: 14px;
            padding: 24px;
            height: 100%;
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            transition: border-color 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }

        .news-cat {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--light);
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 14px;
            align-self: flex-start;
        }

        .news-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .news-title a {
            color: var(--text-main);
        }

        .news-title a:hover {
            color: var(--primary);
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        .news-date {
            font-size: 13px;
            color: var(--text-placeholder);
        }

        .news-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s, gap 0.2s;
        }

        .news-more:hover {
            color: var(--primary);
            gap: 8px;
        }

        .news-empty {
            border: 2px dashed var(--border);
            border-radius: var(--radius-card);
            padding: 64px 24px;
            text-align: center;
            color: var(--text-muted);
        }

        .news-empty .empty-icon {
            font-size: 32px;
            color: var(--text-placeholder);
            margin-bottom: 12px;
        }

        .news-empty p {
            margin: 0;
            font-size: 15px;
        }

        /* ====== FAQ ====== */
        .faq-section {
            padding: var(--space-lg) 0;
        }

        .faq-section .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border);
        }

        .faq-section .accordion-button {
            background: transparent;
            box-shadow: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            padding: 22px 0;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .faq-section .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 22px;
            color: var(--primary);
            width: auto;
            height: auto;
            margin-left: auto;
            font-weight: 600;
            transition: transform 0.25s ease;
        }

        .faq-section .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            background-image: none;
        }

        .faq-section .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: transparent;
        }

        .faq-section .accordion-button:focus {
            box-shadow: none;
        }

        .faq-section .accordion-body {
            padding: 0 0 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ====== 页脚 ====== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 72px;
        }

        .site-footer .footer-brand {
            margin-bottom: 20px;
        }

        .site-footer .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 10px;
        }

        .site-footer h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
        }

        .site-footer ul li a:hover {
            color: var(--primary);
        }

        .site-footer .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
        }

        .site-footer .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            margin-top: 56px;
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom p {
            margin: 0;
        }

        /* ====== 响应式 ====== */
        @media (max-width: 991.98px) {
            .custom-navbar .container {
                padding-top: 12px;
                padding-bottom: 12px;
            }

            .custom-navbar .navbar-collapse {
                padding: 12px 0;
            }

            .custom-navbar .nav-link.active::after {
                left: 18px;
                transform: none;
                width: 3px;
                height: 18px;
                top: 50%;
                translate: 0 -50%;
            }

            .custom-navbar .nav-link {
                padding: 12px 18px;
                border-radius: 8px;
            }

            .custom-navbar .nav-link.active {
                background: rgba(255, 90, 31, 0.10);
            }

            .custom-navbar .nav-link.active::after {
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                width: 3px;
                height: 20px;
                border-radius: 3px;
                background: var(--primary);
            }

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

            .hero {
                padding: 110px 0 80px;
            }

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

            .hero h1 {
                margin-left: auto;
                margin-right: auto;
            }

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

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

            .hero .trust-note {
                justify-content: center;
            }

            .hero-visual {
                margin: 60px auto 0;
                max-width: 380px;
            }

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

            .testimonial-carousel .carousel-control-prev,
            .testimonial-carousel .carousel-control-next {
                display: none;
            }

            .testimonial-carousel .carousel-item .row {
                justify-content: center;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --space-lg: 72px;
                --space-md: 56px;
                --space-sm: 40px;
            }

            .hero {
                padding: 90px 0 60px;
            }

            .hero h1 {
                font-size: clamp(28px, 8vw, 38px);
            }

            .hero .hero-actions .btn {
                flex: 1;
                min-width: 140px;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat .num {
                font-size: 22px;
            }

            .hero-ring {
                width: 120px;
                height: 120px;
                top: -16px;
                right: -16px;
            }

            .guarantee-item {
                padding: 16px 8px;
            }
        }

        @media (max-width: 575.98px) {
            .hero .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .hero .hero-actions .btn {
                width: 100%;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }

            .program-card .program-body {
                padding: 16px;
            }

            .testimonial-card {
                padding: 20px;
            }

            .cta-section .cta-desc {
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #FF5A1F;
            --primary-dark: #E84913;
            --accent: #2CE080;
            --dark: #14161A;
            --light: #F6F5F2;
            --card-bg: #FFFFFF;
            --text: #1E2126;
            --text-muted: #6C727C;
            --text-light: #A8AEB8;
            --border: #E8E6E1;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-img: 12px;
            --shadow-card: 0 2px 8px rgba(20, 22, 26, 0.04);
            --shadow-hover: 0 12px 30px rgba(20, 22, 26, 0.10);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--light);
            color: var(--text);
            line-height: 1.75;
            letter-spacing: 0.005em;
            -webkit-font-smoothing: antialiased;
            padding-top: 80px;
        }

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

        a {
            text-decoration: none;
            color: var(--primary);
            transition: color .25s;
        }

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

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

        /* ===== Buttons ===== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            transition: all .25s ease;
            border: 1.5px solid transparent;
            letter-spacing: 0.02em;
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(255, 90, 31, 0.30);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 90, 31, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 90, 31, 0.25);
        }

        .btn-outline-dark {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.65);
            color: #fff;
        }

        .btn-outline-dark:hover,
        .btn-outline-dark:focus {
            background: rgba(255, 255, 255, 0.06);
            border-color: #fff;
            color: #fff;
        }

        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--primary);
            padding: 8px 4px;
        }

        .btn-ghost i {
            transition: transform .25s;
            margin-left: 4px;
        }

        .btn-ghost:hover i {
            transform: translateX(4px);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }

        .btn-nav {
            margin-left: 28px;
            padding: 10px 24px;
            font-size: 15px;
        }

        /* ===== Navbar ===== */
        .custom-navbar {
            background: rgba(20, 22, 26, 0.95);
            padding: 0;
            min-height: 80px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
        }

        .custom-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .custom-navbar .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            box-shadow: 0 4px 12px rgba(255, 90, 31, 0.35);
        }

        .custom-navbar .navbar-nav {
            gap: 6px;
        }

        .custom-navbar .nav-link {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 16px;
            padding: 10px 16px !important;
            position: relative;
            border-radius: 8px;
            letter-spacing: 0.02em;
            transition: color .25s, background .25s;
        }

        .custom-navbar .nav-link:hover {
            color: var(--primary);
            background: rgba(255, 90, 31, 0.08);
        }

        .custom-navbar .nav-link.active {
            color: var(--primary);
        }

        .custom-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .navbar-toggler {
            border: none;
            outline: none;
            box-shadow: none !important;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(255,255,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }

        /* ===== Category Hero ===== */
        .category-hero {
            background: linear-gradient(90deg, rgba(20, 22, 26, 0.94) 0%, rgba(20, 22, 26, 0.75) 45%, rgba(20, 22, 26, 0.40) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 130px 0 110px;
            color: #fff;
            position: relative;
        }

        .category-hero .hero-crumb {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }

        .category-hero .hero-crumb a {
            color: rgba(255, 255, 255, 0.75);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            transition: color .25s, border-color .25s;
        }

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

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(44, 224, 128, 0.15);
            border: 1px solid rgba(44, 224, 128, 0.35);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            margin-bottom: 24px;
            letter-spacing: 0.04em;
        }

        .category-hero h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.01em;
            margin-bottom: 20px;
            color: #fff;
        }

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

        .category-hero .hero-sub {
            font-size: clamp(16px, 1.8vw, 20px);
            line-height: 1.65;
            color: rgba(255, 255, 255, 0.80);
            max-width: 620px;
            margin-bottom: 36px;
        }

        .category-hero .hero-ctas {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 36px;
        }

        .category-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
        }

        .category-hero .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .category-hero .hero-meta i {
            color: var(--accent);
        }

        /* ===== Section base ===== */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(255, 90, 31, 0.08);
            padding: 5px 14px;
            border-radius: var(--radius-btn);
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .stat-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            transition: border-color .3s, transform .3s;
        }

        .stat-item:hover {
            border-color: rgba(255, 90, 31, 0.5);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .stat-number em {
            font-style: normal;
            color: var(--accent);
            font-size: 20px;
            margin-left: 2px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            margin-top: 6px;
        }

        /* ===== Benefit cards ===== */
        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .benefit-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s, transform .3s;
            border: 1px solid transparent;
        }

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

        .benefit-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(255, 90, 31, 0.10);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .benefit-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .benefit-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== Feature rows (交错图文) ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            margin-bottom: 80px;
        }

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

        .feature-media {
            position: relative;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .feature-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .feature-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 65%, rgba(20, 22, 26, 0.15) 100%);
            pointer-events: none;
        }

        .feature-content .feature-tag {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.05em;
            margin-bottom: 12px;
            display: block;
        }

        .feature-content h3 {
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .feature-content p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .feature-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 15px;
            color: var(--text);
            padding: 6px 0;
        }

        .feature-list li i {
            color: var(--accent);
            font-size: 14px;
            margin-top: 5px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }

        .step-item {
            position: relative;
            background: #fff;
            border-radius: var(--radius-card);
            padding: 36px 28px;
            border: 1px solid var(--border);
            transition: box-shadow .3s, transform .3s, border-color .3s;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(255, 90, 31, 0.4);
        }

        .step-num {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 6px 16px rgba(255, 90, 31, 0.3);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== Recommend cards ===== */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .recommend-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            transition: box-shadow .3s, transform .3s, border-color .3s;
            display: flex;
            flex-direction: column;
        }

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

        .recommend-card .card-media {
            position: relative;
            overflow: hidden;
        }

        .recommend-card .card-media img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .recommend-card:hover .card-media img {
            transform: scale(1.05);
        }

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(20, 22, 26, 0.75);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            backdrop-filter: blur(4px);
            letter-spacing: 0.04em;
        }

        .card-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .recommend-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

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

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

        .recommend-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
            flex: 1;
        }

        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .card-link i {
            transition: transform .25s;
        }

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

        /* ===== Accordion (FAQ) ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s;
        }

        .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-button {
            background: #fff;
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            padding: 22px 28px;
            border: none;
            box-shadow: none !important;
            transition: color .25s;
            line-height: 1.4;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(255, 90, 31, 0.02);
        }

        .accordion-button::after {
            background-size: 14px;
            transition: transform .25s;
            opacity: 0.6;
            filter: invert(0.3);
        }

        .accordion-button:not(.collapsed)::after {
            filter: invert(0.5) sepia(1) saturate(5) hue-rotate(-10deg);
        }

        .accordion-body {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--dark);
            color: #fff;
            padding: 110px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 420px;
            height: 420px;
            border: 60px solid rgba(255, 90, 31, 0.06);
            border-radius: 50%;
            top: -180px;
            right: -120px;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            border: 34px solid rgba(44, 224, 128, 0.05);
            border-radius: 50%;
            bottom: -120px;
            left: -80px;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: clamp(26px, 3.4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #fff;
        }

        .cta-text {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.70);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.65);
            padding: 80px 0 0;
            font-size: 14px;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color .25s, padding-left .25s;
        }

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

        .footer-brand {
            margin-bottom: 20px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.50);
            font-size: 14px;
            margin-bottom: 0;
            letter-spacing: 0.02em;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0 28px;
            margin-top: 56px;
            text-align: center;
            color: rgba(255, 255, 255, 0.35);
            font-size: 13px;
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .custom-navbar {
                min-height: 70px;
            }

            body {
                padding-top: 70px;
            }

            .custom-navbar .navbar-collapse {
                background: var(--dark);
                padding: 20px 24px 28px;
                border-radius: 0 0 18px 18px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }

            .custom-navbar .navbar-nav {
                gap: 4px;
                margin-bottom: 16px;
            }

            .custom-navbar .nav-link.active::after {
                left: 0;
                bottom: 8px;
                width: 3px;
                height: 18px;
                right: auto;
                border-radius: 3px;
                background: var(--primary);
            }

            .btn-nav {
                margin-left: 0;
                width: 100%;
                text-align: center;
            }

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

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

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

            .feature-row {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 56px;
            }

            .feature-row .feature-media img {
                height: 320px;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 100px 0 80px;
            }

            .category-hero .hero-ctas .btn {
                width: 100%;
            }

            .section {
                padding: 64px 0;
            }

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

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

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

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

            .stat-item {
                padding: 20px 14px;
            }

            .stat-number {
                font-size: 28px;
            }

            .feature-row .feature-media img {
                height: 260px;
            }

            .site-footer .row > div {
                margin-bottom: 24px;
            }

            .site-footer h4 {
                margin-bottom: 14px;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 80px 0 60px;
                text-align: center;
            }

            .category-hero .hero-sub {
                margin-left: auto;
                margin-right: auto;
            }

            .category-hero .hero-meta {
                justify-content: center;
            }

            .category-hero .hero-ctas {
                justify-content: center;
            }

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

            .section-head {
                margin-bottom: 40px;
            }

            .footer-bottom {
                margin-top: 36px;
                padding-bottom: 20px;
            }
        }

/* roulang page: article */
:root {
            --primary: #FF5A1F;
            --primary-hover: #E84913;
            --accent: #2CE080;
            --dark: #14161A;
            --light: #F6F5F2;
            --card-bg: #FFFFFF;
            --text-main: #1E2126;
            --text-sub: #6C727C;
            --text-muted: #A8AEB8;
            --border: #E8E6E1;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 999px;
            --shadow-card: 0 2px 8px rgba(20,22,26,0.04);
            --shadow-hover: 0 12px 30px rgba(20,22,26,0.10);
            --shadow-cta: 0 8px 20px rgba(255,90,31,0.30);
            --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--light);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            vertical-align: middle;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        .custom-navbar {
            background: rgba(20, 22, 26, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            min-height: 80px;
            padding-top: 12px;
            padding-bottom: 12px;
            transition: background 0.3s ease;
        }

        .custom-navbar .navbar-brand {
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .custom-navbar .navbar-brand:hover {
            color: #fff;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #FF5A1F 0%, #FF8A5C 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(255, 90, 31, 0.35);
        }

        .custom-navbar .nav-link {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 15px;
            padding: 8px 16px !important;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
            letter-spacing: 0.01em;
        }

        .custom-navbar .nav-link:hover,
        .custom-navbar .nav-link:focus {
            color: var(--primary);
        }

        .custom-navbar .nav-link.active {
            color: var(--primary);
            background: rgba(255, 90, 31, 0.08);
            border-radius: 8px;
        }

        .custom-navbar .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-nav {
            margin-left: 24px;
            padding: 10px 22px;
        }

        .navbar-toggler {
            border-color: rgba(255, 255, 255, 0.3);
            padding: 4px 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.3);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            color: #fff;
            box-shadow: var(--shadow-cta);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 90, 31, 0.40);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 6px 16px rgba(255, 90, 31, 0.30);
        }

        .btn-outline-dark {
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(20, 22, 26, 0.25);
            color: var(--text-main);
            padding: 10px 24px;
            font-weight: 600;
            font-size: 14px;
            background: transparent;
            transition: all 0.3s ease;
        }

        .btn-outline-dark:hover {
            background: rgba(20, 22, 26, 0.05);
            border-color: var(--text-main);
            color: var(--text-main);
            transform: translateY(-1px);
        }

        .article-header {
            background: var(--light);
            padding: 140px 0 56px;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 24px;
            font-size: 14px;
        }

        .breadcrumb-item a {
            color: var(--text-sub);
            text-decoration: none;
            transition: color 0.2s;
        }

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

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

        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
            content: "›";
        }

        .article-header h1 {
            font-size: clamp(26px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 18px;
            max-width: 820px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-sub);
            font-size: 14px;
        }

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

        .article-meta i {
            color: var(--primary);
            font-size: 13px;
        }

        .article-container {
            max-width: 860px;
            margin: 0 auto;
            padding: 56px 24px 48px;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-main);
            letter-spacing: 0.005em;
        }

        .article-content p {
            margin-bottom: 22px;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 44px 0 20px;
            line-height: 1.35;
            color: var(--text-main);
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 700;
            margin: 36px 0 16px;
            line-height: 1.4;
            color: var(--text-main);
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin: 28px 0 14px;
        }

        .article-content img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-img);
            margin: 28px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--light);
            padding: 18px 24px;
            margin: 32px 0;
            border-radius: 0 12px 12px 0;
            color: var(--text-sub);
            font-style: normal;
            font-size: 16px;
            line-height: 1.7;
        }

        .article-content ul,
        .article-content ol {
            margin: 20px 0 24px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            transition: color 0.2s;
        }

        .article-content a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            line-height: 1.6;
        }

        .article-content th {
            background: var(--light);
            font-weight: 700;
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 40px 0;
        }

        .article-tags {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .article-tag {
            display: inline-block;
            background: var(--light);
            border: 1px solid var(--border);
            color: var(--text-sub);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 6px;
            transition: all 0.2s ease;
            letter-spacing: 0.02em;
        }

        .article-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 90, 31, 0.04);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 2px dashed var(--border);
        }

        .article-not-found h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .article-not-found p {
            color: var(--text-sub);
            margin-bottom: 24px;
            font-size: 16px;
        }

        .article-nav-links {
            padding: 0 0 60px;
            background: var(--light);
        }

        .article-nav-links .btn {
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
        }

        .related-section {
            padding: 80px 0;
            background: var(--light);
            border-top: 1px solid var(--border);
        }

        .related-section .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            text-align: center;
            margin-bottom: 44px;
            color: var(--text-main);
            letter-spacing: -0.01em;
        }

        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            border: none;
        }

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

        .related-card .card-img {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            position: relative;
            background: var(--dark);
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .related-card:hover .card-img img {
            transform: scale(1.06);
        }

        .related-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(20, 22, 26, 0.15) 100%);
            pointer-events: none;
        }

        .related-card .card-body {
            padding: 22px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-tag {
            display: inline-block;
            background: rgba(44, 224, 128, 0.12);
            color: #0E8F4A;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 6px;
            margin-bottom: 12px;
            align-self: flex-start;
            letter-spacing: 0.02em;
        }

        .related-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .related-card .card-title a {
            color: inherit;
            transition: color 0.2s;
        }

        .related-card .card-title a:hover {
            color: var(--primary);
        }

        .related-card .card-excerpt {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .related-card .card-meta a {
            font-weight: 600;
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s;
        }

        .related-card .card-meta a:hover {
            color: var(--primary);
        }

        .article-cta {
            background: var(--dark);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .article-cta::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }

        .article-cta .container {
            position: relative;
            z-index: 2;
        }

        .article-cta h2 {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .article-cta p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            margin-bottom: 30px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .article-cta .btn-primary {
            font-size: 17px;
            padding: 16px 40px;
        }

        .site-footer {
            background: var(--dark);
            padding: 70px 0 24px;
            color: rgba(255, 255, 255, 0.75);
        }

        .site-footer .footer-brand {
            margin-bottom: 16px;
        }

        .site-footer .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .site-footer p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
        }

        .site-footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }

        .site-footer ul a {
            color: rgba(255, 255, 255, 0.55);
            text-decoration: none;
            transition: color 0.2s, padding-left 0.2s;
            display: inline-block;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 50px;
            padding-top: 22px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-contact i {
            color: var(--primary);
            font-size: 13px;
        }

        @media (max-width: 991.98px) {
            .custom-navbar .navbar-collapse {
                background: rgba(20, 22, 26, 0.98);
                padding: 20px;
                border-radius: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.08);
            }

            .custom-navbar .nav-link {
                padding: 12px 16px !important;
                border-radius: 8px;
            }

            .custom-navbar .nav-link.active {
                background: transparent;
                border-left: 3px solid var(--primary);
                border-radius: 0;
            }

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

            .btn-nav {
                margin-left: 0;
                margin-top: 16px;
                display: block;
                text-align: center;
            }

            .article-header {
                padding: 120px 0 40px;
            }

            .article-header h1 {
                font-size: clamp(22px, 5vw, 32px);
            }
        }

        @media (max-width: 767.98px) {
            .article-header {
                padding: 100px 0 36px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-container {
                padding: 40px 20px 32px;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.8;
            }

            .article-tags {
                gap: 8px;
            }

            .article-tag {
                font-size: 12px;
                padding: 5px 12px;
            }

            .related-section {
                padding: 60px 0;
            }

            .related-card .card-body {
                padding: 18px 16px 16px;
            }

            .article-cta {
                padding: 60px 0;
            }

            .site-footer {
                padding: 50px 0 20px;
            }
        }

        @media (max-width: 520px) {
            .custom-navbar .navbar-brand {
                font-size: 17px;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }

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

            .article-header h1 {
                font-size: 22px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .btn-primary {
                padding: 10px 22px;
                font-size: 14px;
            }

            .article-cta .btn-primary {
                font-size: 16px;
                padding: 14px 32px;
            }
        }