/* roulang page: index */
:root {
            --primary: #0F9C8A;
            --primary-dark: #0B7A6C;
            --primary-light: #E6F4F1;
            --accent: #FF7B45;
            --accent-dark: #E8622C;
            --accent-light: #FFF1EA;
            --dark: #1F2E3A;
            --text-secondary: #6B7A85;
            --bg-warm: #F8F6F1;
            --bg-light-green: #F0F6F4;
            --gold: #D9B25F;
            --border: #E3EAE7;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 2px 8px rgba(31, 46, 58, 0.05);
            --shadow-hover: 0 10px 30px rgba(31, 46, 58, 0.10);
            --shadow-btn: 0 8px 20px rgba(255, 123, 69, 0.30);
            --shadow-nav: 0 4px 16px rgba(31, 46, 58, 0.06);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--dark);
            background: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }

        ul {
            list-style: none;
        }

        .grid-container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin: 0 auto;
        }

        .section-padding {
            padding: 90px 0;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(248, 246, 241, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(227, 234, 231, 0.6);
            box-shadow: var(--shadow-nav);
        }

        .site-header .grid-container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #12B5A0 0%, #0B7A6C 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .logo-mark::before {
            content: '';
            position: absolute;
            width: 22px;
            height: 14px;
            border: 2px solid rgba(255, 255, 255, 0.8);
            border-radius: 50% 50% 0 0;
            transform: rotate(-15deg);
            bottom: 8px;
        }

        .logo-mark::after {
            content: '';
            position: absolute;
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 2px;
            top: 9px;
            right: 9px;
            transform: rotate(20deg);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .logo-text span {
            color: var(--primary);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
        }

        .header-nav a.nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: #4A5568;
            border-radius: 6px;
            position: relative;
            transition: var(--transition);
        }

        .header-nav a.nav-link:hover {
            color: var(--primary);
            background: rgba(15, 156, 138, 0.06);
        }

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

        .header-nav a.nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            background: transparent;
            position: relative;
            cursor: pointer;
        }

        .nav-toggle .bar {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            margin: 5px auto;
            border-radius: 2px;
            transition: var(--transition);
            position: relative;
        }

        .nav-toggle .bar::after {
            content: '';
            position: absolute;
            right: -6px;
            top: 0px;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            line-height: 1.4;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 2px 8px rgba(255, 123, 69, 0.3);
        }

        .btn-accent:hover {
            background: #ff8a5c;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 123, 69, 0.2);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 12px 30px;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

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

        .btn-lg {
            height: 56px;
            font-size: 17px;
            padding: 0 36px;
        }

        .btn-sm {
            font-size: 14px;
            padding: 10px 20px;
            height: 40px;
            border-radius: 6px;
        }

        .btn i {
            font-size: 18px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 140px 0 100px;
            background: linear-gradient(135deg, #E9F5F2 0%, #F8F6F1 50%, #FDF9F3 100%);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center bottom;
            opacity: 0.12;
            z-index: 0;
        }

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

        .hero-content {
            padding-right: 40px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(15, 156, 138, 0.1);
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            border: 1px solid rgba(15, 156, 138, 0.2);
        }

        .hero-title {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.5px;
            color: var(--dark);
            margin-bottom: 20px;
        }

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

        .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            margin-bottom: 44px;
            flex-wrap: wrap;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
        }

        .trust-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--dark);
            font-variant-numeric: tabular-nums;
        }

        .trust-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        .trust-divider {
            width: 1px;
            height: 36px;
            background: rgba(217, 178, 95, 0.4);
        }

        .hero-visual {
            position: relative;
        }

        .hero-card-layout {
            position: relative;
            padding: 16px 16px 16px 0;
        }

        .hero-card-bg {
            position: absolute;
            top: 24px;
            right: 0;
            bottom: 0;
            left: 24px;
            background: rgba(15, 156, 138, 0.15);
            border-radius: var(--radius-lg);
            z-index: 0;
        }

        .hero-img {
            position: relative;
            z-index: 1;
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .hero-float-card {
            position: absolute;
            bottom: 24px;
            left: 0;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-radius: 12px;
            padding: 14px 20px;
            box-shadow: var(--shadow-hover);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .float-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 16px;
        }

        .float-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        .float-text strong {
            font-size: 14px;
            color: var(--dark);
            display: block;
        }

        /* ===== Section Head ===== */
        .section-head {
            text-align: center;
            margin-bottom: 60px;
        }

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

        .section-eyebrow {
            display: inline-block;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(15, 156, 138, 0.08);
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.35;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-head.left .section-desc {
            margin: 0;
        }

        /* ===== Feature Slider ===== */
        .feature-section {
            padding: 100px 0 90px;
            background: var(--bg-warm);
            position: relative;
        }

        .feature-slider {
            position: relative;
            max-width: 1000px;
            margin: 0 auto;
            overflow: hidden;
            padding: 20px 0 60px;
        }

        .feature-track {
            display: flex;
            transition: transform 0.5s ease;
        }

        .feature-slide {
            min-width: 100%;
            padding: 0 15px;
            flex-shrink: 0;
        }

        .feature-card {
            background: var(--bg-warm);
            border-radius: var(--radius-lg);
            overflow: hidden;
            text-align: center;
            padding: 36px 28px 40px;
            border: 1px solid transparent;
            border-bottom: 3px solid var(--primary);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            max-width: 720px;
            margin: 0 auto;
        }

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

        .feature-img {
            width: 100%;
            border-radius: 12px;
            aspect-ratio: 16/9;
            object-fit: cover;
            margin-bottom: 24px;
        }

        .feature-card h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 480px;
            margin: 0 auto;
        }

        .slider-btn {
            position: absolute;
            top: 42%;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            z-index: 5;
            transition: var(--transition);
            cursor: pointer;
        }

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

        .slider-prev {
            left: 10px;
        }

        .slider-next {
            right: 10px;
        }

        .slider-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 30px;
        }

        .slider-dots .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #D5DEDA;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            padding: 0;
        }

        .slider-dots .dot.active {
            background: var(--primary);
            transform: scale(1.2);
        }

        /* ===== System Requirements ===== */
        .requirements-section {
            padding: 100px 0 90px;
            background: var(--bg-light-green);
        }

        .req-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
            border: 1px solid rgba(227, 234, 231, 0.6);
            transition: var(--transition);
            height: 100%;
        }

        .req-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(15, 156, 138, 0.3);
        }

        .req-card-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 24px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border);
        }

        .req-card-head i {
            font-size: 28px;
            color: var(--primary);
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 10px;
        }

        .req-card-head h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark);
        }

        .req-item {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }

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

        .req-label {
            font-size: 14px;
            color: var(--text-secondary);
            flex-shrink: 0;
            margin-right: 16px;
        }

        .req-value {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        .req-note {
            font-size: 13px;
            color: var(--text-secondary);
            text-align: center;
            margin-top: 16px;
        }

        /* ===== Testimonials ===== */
        .testimonials-section {
            padding: 100px 0;
            background: var(--bg-warm);
            position: relative;
        }

        .testimonials-section::before {
            content: '';
            position: absolute;
            top: -40px;
            left: 0;
            right: 0;
            height: 40px;
            background: url('/assets/images/backpic/back-2.webp') center top / cover no-repeat;
            opacity: 0.06;
        }

        .rating-summary {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            margin-bottom: 56px;
            flex-wrap: wrap;
        }

        .rating-num {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            font-variant-numeric: tabular-nums;
        }

        .rating-stars {
            color: var(--gold);
            font-size: 20px;
            letter-spacing: 4px;
        }

        .rating-count {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .testimonial-card {
            background: var(--bg-warm);
            border-radius: 12px;
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border-left: 3px solid var(--primary);
            margin-bottom: 24px;
            transition: var(--transition);
            height: 100%;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .testimonial-card .stars {
            color: var(--gold);
            font-size: 15px;
            letter-spacing: 3px;
            margin-bottom: 14px;
        }

        .testimonial-card p {
            font-size: 15px;
            color: #3A4A55;
            line-height: 1.7;
            margin-bottom: 20px;
            min-height: 76px;
        }

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

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .user-info .user-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            display: block;
        }

        .user-info .user-loc {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* ===== Download ===== */
        .download-section {
            padding: 100px 0 90px;
            background: linear-gradient(180deg, var(--bg-warm) 0%, #F0F6F4 100%);
        }

        .download-meta {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
            letter-spacing: 0.3px;
        }

        .download-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 48px;
        }

        .download-btn {
            width: 200px;
            height: 64px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            padding: 0 24px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }

        .download-btn i {
            font-size: 24px;
        }

        .download-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 123, 69, 0.25);
        }

        .download-primary:hover {
            background: #ff8a5c;
            color: #fff;
            transform: translateY(-3px);
            box-shadow: var(--shadow-btn);
        }

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

        .download-secondary:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(15, 156, 138, 0.15);
        }

        .download-btn .dl-info {
            display: flex;
            flex-direction: column;
            text-align: left;
            line-height: 1.3;
        }

        .dl-platform {
            font-size: 15px;
            font-weight: 600;
        }

        .dl-action {
            font-size: 12px;
            opacity: 0.75;
        }

        .download-hint {
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 36px;
        }

        /* ===== News ===== */
        .news-section {
            padding: 100px 0 90px;
            background: var(--bg-warm);
        }

        .news-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid transparent;
            box-shadow: var(--shadow-card);
            height: 100%;
            margin-bottom: 24px;
        }

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

        .news-card-link {
            display: block;
            padding: 24px;
            text-decoration: none;
            color: inherit;
        }

        .news-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 100px;
            margin-bottom: 12px;
        }

        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 48px;
            transition: var(--transition);
        }

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

        .news-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 42px;
        }

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

        .news-date {
            color: var(--text-secondary);
        }

        .news-more {
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-more i {
            transition: transform 0.3s;
        }

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

        .news-empty {
            text-align: center;
            padding: 80px 20px;
            grid-column: 1 / -1;
        }

        .news-empty .empty-icon {
            font-size: 42px;
            color: #C5D0CC;
            margin-bottom: 16px;
            display: block;
        }

        .news-empty p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1B2E2A;
            color: #A8BBB5;
            padding: 70px 0 30px;
            font-size: 14px;
        }

        .footer-cols {
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 30px;
        }

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, #12B5A0, #0B7A6C);
            display: inline-block;
            position: relative;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #8FA39C;
            margin-bottom: 20px;
            max-width: 280px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A8BBB5;
            transition: var(--transition);
            font-size: 15px;
        }

        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .footer-cols h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            margin-top: 10px;
        }

        .footer-cols ul li {
            margin-bottom: 12px;
        }

        .footer-cols ul li a {
            color: #A8BBB5;
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            text-align: center;
            font-size: 13px;
            color: #7A938B;
            padding-top: 10px;
        }

        .footer-bottom .dot {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.25);
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 999;
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            padding: 16px 24px 24px;
        }

        .mobile-nav.open {
            display: block;
        }

        .mobile-nav a {
            display: block;
            padding: 12px 8px;
            font-size: 18px;
            color: var(--dark);
            border-bottom: 1px solid var(--border);
            font-weight: 500;
        }

        .mobile-nav a:last-of-type {
            border-bottom: none;
        }

        .mobile-nav a.active {
            color: var(--primary);
        }

        .mobile-nav a:hover {
            color: var(--primary);
            background: rgba(15, 156, 138, 0.04);
        }

        .mobile-nav .mobile-cta {
            margin-top: 16px;
        }

        .mobile-nav .mobile-cta a {
            border-bottom: none;
            text-align: center;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1023px) {
            .header-nav {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .header-cta {
                display: none;
            }

            .hero-section {
                padding: 120px 0 80px;
            }

            .hero-title {
                font-size: 38px;
            }

            .hero-content {
                padding-right: 20px;
            }

            .hero-buttons {
                flex-wrap: wrap;
            }

            .section-padding {
                padding: 70px 0;
            }

            .feature-section,
            .requirements-section,
            .testimonials-section,
            .download-section,
            .news-section {
                padding: 70px 0 60px;
            }

            .section-title {
                font-size: 30px;
            }
        }

        @media screen and (max-width: 767px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }

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

            .hero-section {
                padding: 100px 0 60px;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-desc {
                font-size: 15px;
            }

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

            .trust-divider {
                display: none;
            }

            .hero-content {
                padding-right: 0;
                margin-bottom: 40px;
            }

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

            .section-title {
                font-size: 26px;
            }

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

            .feature-card {
                padding: 24px 16px 28px;
            }

            .slider-btn {
                display: none;
            }

            .req-card {
                padding: 24px 20px;
            }

            .req-item {
                flex-direction: column;
                gap: 4px;
            }

            .req-value {
                text-align: left;
            }

            .testimonial-card p {
                min-height: auto;
            }

            .download-buttons {
                gap: 12px;
            }

            .download-btn {
                width: calc(50% - 12px);
                min-width: 150px;
                padding: 0 16px;
            }

            .rating-summary {
                gap: 12px;
            }

            .rating-num {
                font-size: 38px;
            }

            .footer-cols h4 {
                margin-top: 24px;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-title {
                font-size: 28px;
                line-height: 1.35;
            }

            .download-btn {
                width: 100%;
                max-width: 260px;
            }

            .download-buttons {
                justify-content: center;
            }
        }

        /* ===== Utility ===== */
        .text-primary {
            color: var(--primary);
        }
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 20px;
        }
        .mb-2 {
            margin-bottom: 20px;
        }
        .fade-up {
            animation: fadeUp 0.6s ease both;
        }
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .foundation-focus {
            outline: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(15, 156, 138, 0.3);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
  --primary: #0F9C8A;
  --primary-dark: #0B7A6C;
  --primary-light: #E6F4F1;
  --cta: #FF7B45;
  --cta-hover: #FF8F5E;
  --dark: #1F2E3A;
  --muted: #6B7A85;
  --bg: #F8F6F1;
  --bg-alt: #F0F6F4;
  --gold: #D9B25F;
  --border: #E3EAE7;
  --footer-bg: #1B2E2A;
  --footer-text: #A8BBB5;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-card: 0 2px 8px rgba(31, 46, 58, 0.05);
  --shadow-hover: 0 10px 30px rgba(31, 46, 58, 0.10);
  --shadow-btn: 0 8px 20px rgba(255, 123, 69, 0.30);
  --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--cta);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  padding: 0 28px;
  height: 48px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  line-height: 1;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--cta-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(255, 123, 69, 0.20);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  padding: 0 24px;
  height: 46px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

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

.btn-outline i {
  font-size: 14px;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(248, 246, 241, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 234, 231, 0.6);
  box-shadow: 0 4px 16px rgba(31, 46, 58, 0.06);
  transition: box-shadow 0.3s ease;
}

.site-header .grid-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  display: inline-block;
  flex-shrink: 0;
}

.header-logo-mark::after {
  content: '';
  position: absolute;
  top: 9px;
  left: 10px;
  width: 20px;
  height: 22px;
  background: rgba(255, 255, 255, 0.20);
  border-radius: 50% 50% 45% 45%;
  transform: rotate(15deg);
}

.header-logo-mark::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 50%;
}

.header-logo-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0 auto;
  padding-left: 40px;
}

.header-nav .nav-link {
  font-size: 15px;
  font-weight: 600;
  color: #4A5568;
  padding: 8px 2px;
  position: relative;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.header-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

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

.header-nav .nav-link:hover::after {
  width: 100%;
}

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

.header-nav .nav-link.active::after {
  width: 100%;
}

.header-cta {
  flex-shrink: 0;
}

.header-cta .btn-primary {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: var(--radius-sm);
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
  border-radius: 10px;
  background: var(--primary-light);
  position: relative;
  z-index: 1100;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle .dot {
  width: 6px;
  height: 6px;
  background: var(--cta);
  border-radius: 50%;
  position: absolute;
  right: 8px;
  top: 8px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg);
  z-index: 1050;
  padding: 16px 24px 24px;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 12px 24px rgba(31, 46, 58, 0.08);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
  padding: 12px 0;
  border-bottom: 1px solid rgba(227, 234, 231, 0.5);
  transition: color 0.2s ease;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--primary);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  padding: 96px 0 24px;
  background: var(--bg);
}

.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: #B8C4C0;
}

.breadcrumb .current {
  color: var(--muted);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 文章头部 ===== */
.article-header {
  padding: 16px 0 8px;
  background: var(--bg);
}

.article-header-inner {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: left;
}

.article-header h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.5px;
  color: var(--dark);
  margin-bottom: 16px;
  word-break: break-word;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.article-meta .dot {
  color: #C0C8C4;
}

.article-meta .badge-category {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.article-meta i {
  font-size: 13px;
  margin-right: 4px;
  opacity: 0.8;
}

/* ===== 文章封面 ===== */
.article-cover {
  padding: 24px 0 8px;
  max-width: 940px;
  margin: 0 auto;
}

.article-cover img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* ===== 正文区域 ===== */
.article-body {
  padding: 24px 0 40px;
  background: var(--bg);
}

.article-content {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--dark);
  word-break: break-word;
}

.article-content > * + * {
  margin-top: 24px;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  margin-top: 40px;
  margin-bottom: 16px;
  line-height: 1.35;
  letter-spacing: 0.5px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
  margin-top: 32px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-content p {
  line-height: 1.8;
  color: #2A3A46;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(15, 156, 138, 0.3);
}

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

.article-content ul,
.article-content ol {
  padding-left: 1.5em;
}

.article-content ul li {
  position: relative;
  padding-left: 8px;
  margin-bottom: 10px;
  line-height: 1.7;
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: -1.2em;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 2px;
  transform: rotate(45deg);
}

.article-content ol {
  list-style: decimal;
}

.article-content ol li {
  padding-left: 4px;
  margin-bottom: 10px;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-alt);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 28px 0;
  color: #4A5A66;
  font-size: 15px;
}

.article-content blockquote p {
  color: #4A5A66;
  margin-bottom: 0;
}

.article-content img {
  border-radius: 12px;
  margin: 28px auto;
  box-shadow: var(--shadow-card);
}

.article-content figure {
  margin: 28px 0;
}

.article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
}

.article-content code {
  background: #EFF3F1;
  color: #C7254E;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.article-content pre {
  background: #1B2E2A;
  color: #E6F4F1;
  padding: 24px;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 28px 0;
}

.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.article-content th {
  background: var(--bg-alt);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  color: var(--dark);
  border-bottom: 2px solid var(--border);
}

.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: #2A3A46;
}

.article-content tr:last-child td {
  border-bottom: none;
}

/* 空状态 */
.article-empty {
  text-align: center;
  padding: 60px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px dashed var(--border);
}

.article-empty .empty-icon {
  font-size: 42px;
  color: #C0C8C4;
  margin-bottom: 16px;
}

.article-empty h3 {
  font-size: 20px;
  color: var(--dark);
  margin-bottom: 8px;
}

.article-empty p {
  color: var(--muted);
  margin-bottom: 24px;
}

/* ===== 标签区 ===== */
.article-tags {
  padding: 24px 0 8px;
  background: var(--bg);
}

.article-tags-inner {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.tag {
  background: var(--bg);
  color: var(--primary);
  border: 1px solid rgba(15, 156, 138, 0.35);
  padding: 5px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.25s ease;
  cursor: default;
}

.tag:hover {
  background: rgba(217, 178, 95, 0.10);
  border-color: var(--gold);
}

/* ===== 相关推荐 ===== */
.related-posts {
  padding: 40px 0 24px;
  background: var(--bg);
}

.related-inner {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
}

.related-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.related-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.related-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-card);
  border-left: 3px solid var(--primary);
  transition: var(--transition);
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-left-color: var(--cta);
}

.related-card .related-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.45;
  margin-bottom: 8px;
}

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

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

.related-card .related-date {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.related-card .related-date i {
  font-size: 12px;
  opacity: 0.7;
}

/* ===== 返回按钮区 ===== */
.back-section {
  padding: 16px 0 80px;
  background: var(--bg);
}

.back-section .back-inner {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== CTA 横幅 ===== */
.cta-banner {
  padding: 24px 0 72px;
  background: var(--bg);
}

.cta-banner .grid-container {
  max-width: 940px;
}

.cta-banner-inner {
  background: linear-gradient(135deg, var(--primary) 0%, #0B7A6C 100%);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}

.cta-banner-inner::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 180px;
  height: 180px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}

.cta-banner-inner::before {
  content: '';
  position: absolute;
  right: 60px;
  top: -30px;
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
}

.cta-text h3 {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.cta-text p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.5;
}

.cta-banner .btn-primary {
  background: var(--cta);
  height: 44px;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  background: var(--cta-hover);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 64px 0 24px;
}

.footer-cols {
  padding-bottom: 40px;
}

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

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

.footer-logo-mark {
  display: inline-block;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  flex-shrink: 0;
}

.footer-logo-mark::after {
  content: '';
  position: absolute;
  top: 7px;
  left: 8px;
  width: 16px;
  height: 18px;
  background: rgba(255, 255, 255, 0.20);
  border-radius: 50% 50% 45% 45%;
  transform: rotate(15deg);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--footer-text);
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(168, 187, 181, 0.3);
  border-radius: 50%;
  color: var(--footer-text);
  font-size: 15px;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.site-footer h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.site-footer ul a {
  font-size: 14px;
  color: var(--footer-text);
  transition: color 0.2s ease;
}

.site-footer ul a:hover {
  color: var(--cta);
  padding-left: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(168, 187, 181, 0.8);
}

.footer-bottom .dot {
  padding: 0 6px;
  color: rgba(168, 187, 181, 0.5);
}

/* ===== 响应式断点 ===== */
@media screen and (max-width: 1023px) {
  .header-nav {
    gap: 18px;
    padding-left: 16px;
  }

  .header-nav .nav-link {
    font-size: 14px;
  }

  .header-cta .btn-primary {
    padding: 0 16px;
    font-size: 13px;
  }

  .article-header h1 {
    font-size: 32px;
  }

  .cta-banner-inner {
    padding: 32px;
  }
}

@media screen and (max-width: 767px) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-header {
    height: 64px;
  }

  .header-nav {
    display: none;
  }

  .header-cta .btn-primary {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-menu {
    top: 64px;
    padding: 12px 16px 20px;
  }

  .breadcrumb-bar {
    padding: 80px 0 16px;
  }

  .breadcrumb .current {
    max-width: 180px;
  }

  .article-header {
    padding: 12px 0 4px;
  }

  .article-header h1 {
    font-size: 28px;
    line-height: 1.35;
  }

  .article-header-inner,
  .article-content,
  .article-tags-inner,
  .related-inner,
  .back-section .back-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .article-content {
    font-size: 15px;
    line-height: 1.75;
  }

  .article-content h2 {
    font-size: 24px;
  }

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

  .article-cover {
    padding: 16px 0 4px;
  }

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

  .related-card {
    padding: 20px;
  }

  .cta-banner {
    padding: 16px 0 48px;
  }

  .cta-banner-inner {
    padding: 28px 24px;
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }

  .cta-banner-inner .btn-primary {
    width: 100%;
    max-width: 240px;
  }

  .site-footer {
    padding-top: 48px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .back-section .back-inner {
    flex-direction: column;
    align-items: center;
  }

  .back-section .btn-outline,
  .back-section .btn-primary {
    width: 100%;
    max-width: 280px;
  }
}

@media screen and (max-width: 520px) {
  .article-header h1 {
    font-size: 24px;
  }

  .article-meta {
    font-size: 13px;
    gap: 6px;
  }

  .article-content blockquote {
    padding: 16px;
  }

  .article-content pre {
    padding: 16px;
    font-size: 13px;
  }
}

/* roulang page: category2 */
:root {
            --primary: #0F9C8A;
            --primary-dark: #0B7A6C;
            --primary-light: #E6F4F1;
            --accent: #FF7B45;
            --accent-hover: #FF8F63;
            --accent-light: #FFF0E9;
            --dark: #1F2E3A;
            --gray: #6B7A85;
            --gray-light: #98A6A0;
            --bg: #F8F6F1;
            --bg-alt: #F0F6F4;
            --border: #E3EAE7;
            --gold: #D9B25F;
            --white: #FFFFFF;
            --footer-bg: #1B2E2A;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(31, 46, 58, 0.05);
            --shadow-hover: 0 10px 30px rgba(31, 46, 58, 0.10);
            --shadow-btn: 0 8px 20px rgba(255, 123, 69, 0.30);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background-color: var(--bg);
            color: var(--dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        .grid-container {
            max-width: var(--container-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(248, 246, 241, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(227, 234, 231, 0.6);
            z-index: 1000;
            box-shadow: 0 4px 16px rgba(31, 46, 58, 0.06);
        }

        .site-header .grid-container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-logo {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, #16B3A0 60%, #7DD4C9 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(15, 156, 138, 0.25);
        }

        .brand-logo::before {
            content: '';
            position: absolute;
            width: 28px;
            height: 16px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-left-color: transparent;
            transform: rotate(-20deg);
        }

        .brand-logo::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 12px;
            border-radius: 50%;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-right-color: transparent;
            transform: rotate(15deg) translate(4px, 4px);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark);
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: #4A5568;
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

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

        .nav-link.active::after {
            width: 100%;
        }

        .header-cta {
            margin-left: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-align: center;
            line-height: 1;
            font-family: inherit;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--white);
            padding: 14px 28px;
            font-size: 15px;
            box-shadow: 0 2px 6px rgba(255, 123, 69, 0.2);
        }

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

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 123, 69, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 12px 26px;
            font-size: 15px;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(15, 156, 138, 0.15);
        }

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

        .btn-accent-outline {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
            padding: 12px 26px;
            font-size: 15px;
        }

        .btn-accent-outline:hover {
            background: var(--accent-light);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(255, 123, 69, 0.15);
        }

        .header-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-direction: column;
            padding: 8px;
            border-radius: 8px;
        }

        .header-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
            border-radius: 2px;
        }

        .header-toggle .toggle-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            position: relative;
            left: -9px;
        }

        .header-toggle.open span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }

        .header-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .header-toggle.open span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 8px 24px rgba(31, 46, 58, 0.08);
            z-index: 999;
            padding: 20px 24px 24px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .nav-link {
            display: block;
            font-size: 18px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(227, 234, 231, 0.5);
            color: var(--dark);
        }

        .mobile-menu .nav-link:last-of-type {
            border-bottom: none;
        }

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

        .mobile-menu .btn {
            margin-top: 20px;
            width: 100%;
        }

        main {
            padding-top: 72px;
        }

        .category-hero {
            background: linear-gradient(90deg, #E8F4F0 0%, #F8F6F1 70%, #FDFCF9 100%);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.webp') right center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }

        .category-hero .grid-container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            font-size: 14px;
            color: var(--gray);
            margin-bottom: 20px;
        }

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

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

        .breadcrumb .sep {
            margin: 0 8px;
            color: #C0CCC6;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.5px;
            color: var(--dark);
            margin-bottom: 14px;
        }

        .category-hero .hero-sub {
            font-size: 16px;
            color: var(--gray);
            max-width: 640px;
            line-height: 1.7;
        }

        .hero-anchors {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }

        .anchor-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 999px;
            background: var(--white);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 500;
            color: var(--dark);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .anchor-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(15, 156, 138, 0.12);
        }

        .anchor-pill .anchor-icon {
            margin-right: 6px;
            font-size: 13px;
            color: var(--primary);
        }

        .category-section {
            padding: 64px 0;
        }

        .category-section.alt-bg {
            background: var(--bg-alt);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: 0.5px;
            color: var(--dark);
            margin-bottom: 16px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--gray);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        .feature-block {
            padding: 48px 0;
            border-bottom: 1px solid var(--border);
        }

        .feature-block:last-child {
            border-bottom: none;
        }

        .feature-block .cell {
            display: flex;
            align-items: center;
        }

        .feature-content {
            padding-right: 24px;
        }

        .feature-block.reverse .feature-content {
            padding-right: 0;
            padding-left: 24px;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
        }

        .feature-block h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .feature-block p {
            font-size: 15px;
            color: #4A5568;
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .feature-list {
            margin-top: 12px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: #4A5568;
            padding: 6px 0;
            line-height: 1.6;
        }

        .feature-list li i {
            color: var(--primary);
            font-size: 13px;
            margin-top: 4px;
            font-style: normal;
        }

        .feature-list li::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--primary);
            transform: rotate(45deg);
            border-radius: 1px;
            flex-shrink: 0;
            margin-top: 8px;
        }

        .feature-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--white);
            padding: 12px;
        }

        .feature-media::before {
            content: '';
            position: absolute;
            bottom: -8px;
            right: -8px;
            width: 70%;
            height: 70%;
            background: var(--primary-light);
            border-radius: var(--radius-lg);
            z-index: 0;
        }

        .feature-media img {
            border-radius: 12px;
            position: relative;
            z-index: 1;
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16/10;
            background: var(--bg-alt);
        }

        .media-badge {
            position: absolute;
            top: 18px;
            right: 18px;
            z-index: 2;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(4px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(31, 46, 58, 0.08);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            padding: 48px 0;
        }

        .faq-title {
            font-size: 30px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .faq-subtitle {
            text-align: center;
            font-size: 15px;
            color: var(--gray);
            margin-bottom: 36px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            padding: 20px 24px;
            background: var(--white);
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: #C8DAD4;
            box-shadow: var(--shadow-sm);
        }

        .faq-item.active {
            background: var(--bg-alt);
            border-color: var(--primary);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            user-select: none;
        }

        .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            font-size: 14px;
            color: #4A5568;
            line-height: 1.7;
            padding-top: 0;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
            padding-top: 14px;
        }

        .cta-banner {
            border-radius: var(--radius-lg);
            background: linear-gradient(120deg, #0F9C8A 0%, #0B7A6C 60%, #1B2E2A 100%);
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin: 64px 0;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(15, 156, 138, 0.18);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 50%;
            height: 160%;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.1;
        }

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

        .cta-text h3 {
            font-size: 24px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .cta-text p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.6;
        }

        .cta-banner .btn-primary {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        .site-footer {
            background: var(--footer-bg);
            padding: 64px 0 32px;
            margin-top: 0;
        }

        .footer-cols {
            margin-bottom: 40px;
        }

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

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 14px;
        }

        .footer-logo-mark {
            display: inline-block;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, #16B3A0 80%);
            position: relative;
        }

        .footer-logo-mark::before {
            content: '';
            position: absolute;
            inset: 6px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-left-color: transparent;
            transform: rotate(20deg);
        }

        .footer-brand p {
            font-size: 14px;
            color: #A8BBB5;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 300px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A8BBB5;
            font-size: 15px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
        }

        .site-footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

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

        .site-footer ul li a {
            font-size: 14px;
            color: #A8BBB5;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #8EA69E;
        }

        .footer-bottom .dot {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.25);
        }

        @media screen and (max-width: 1023px) {
            .header-nav {
                display: none;
            }

            .header-cta {
                display: none;
            }

            .header-toggle {
                display: flex;
            }

            .section-title {
                font-size: 26px;
            }

            .category-hero h1 {
                font-size: 34px;
            }

            .feature-block .cell {
                flex-direction: column;
                align-items: flex-start;
            }

            .feature-content {
                padding-right: 0;
                padding-bottom: 24px;
            }

            .feature-block.reverse .feature-content {
                padding-left: 0;
            }

            .feature-media {
                width: 100%;
            }

            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px;
            }

            .cta-banner .btn-primary {
                width: 100%;
            }
        }

        @media screen and (max-width: 767px) {
            .grid-container {
                padding-left: 20px;
                padding-right: 20px;
            }

            main {
                padding-top: 64px;
            }

            .site-header {
                height: 64px;
            }

            .mobile-menu {
                top: 64px;
            }

            .brand-text {
                font-size: 18px;
            }

            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .category-hero .hero-sub {
                font-size: 14px;
            }

            .hero-anchors {
                gap: 8px;
                margin-top: 20px;
            }

            .anchor-pill {
                padding: 6px 14px;
                font-size: 13px;
            }

            .category-section {
                padding: 40px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }

            .feature-block {
                padding: 36px 0;
            }

            .feature-block h3 {
                font-size: 20px;
            }

            .feature-block p {
                font-size: 14px;
            }

            .faq-wrap {
                padding: 36px 0;
            }

            .faq-title {
                font-size: 24px;
            }

            .faq-item {
                padding: 16px 18px;
            }

            .faq-question {
                font-size: 14px;
            }

            .cta-banner {
                margin: 48px 0;
                padding: 28px 20px;
            }

            .cta-text h3 {
                font-size: 20px;
            }

            .site-footer {
                padding: 48px 0 24px;
            }
        }

        @media screen and (max-width: 520px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .hero-anchors {
                width: 100%;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 4px;
            }

            .anchor-pill {
                white-space: nowrap;
                flex-shrink: 0;
            }

            .section-title {
                font-size: 22px;
            }

            .feature-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }

            .media-badge {
                top: 12px;
                right: 12px;
                font-size: 11px;
                padding: 4px 10px;
            }
        }

/* roulang page: category1 */
/* ===== Design Tokens ===== */
        :root {
            --primary: #0F9C8A;
            --primary-dark: #0B7E6F;
            --primary-light: #F0F6F4;
            --cta: #FF7B45;
            --cta-hover: #FF8F60;
            --text-dark: #1F2E3A;
            --text-secondary: #6B7A85;
            --text-muted: #98A6A0;
            --bg-warm: #F8F6F1;
            --bg-white: #FFFFFF;
            --border: #E3EAE7;
            --gold: #D9B25F;
            --dark-bg: #1B2E2A;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(31, 46, 58, 0.05);
            --shadow-md: 0 10px 30px rgba(31, 46, 58, 0.10);
            --shadow-btn: 0 8px 20px rgba(255, 123, 69, 0.30);
            --transition: all 0.25s ease;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            color: var(--text-dark);
            background: var(--bg-warm);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        .grid-container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Buttons & Badges ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--cta);
            color: #fff;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--cta-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 123, 69, 0.25);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(248, 246, 241, 0.95);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            z-index: 999;
            border-bottom: 1px solid rgba(227, 234, 231, 0.6);
            box-shadow: 0 4px 16px rgba(31, 46, 58, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            position: relative;
            flex-shrink: 0;
        }
        .logo-mark::before {
            content: "";
            position: absolute;
            inset: 8px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .logo-mark::after {
            content: "";
            position: absolute;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--cta);
            bottom: 6px;
            left: 50%;
            transform: translateX(-50%);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            letter-spacing: 0.5px;
        }
        .header-nav {
            display: flex;
            gap: 28px;
            align-items: center;
            margin: 0 auto 0 40px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 600;
            color: #4A5568;
            position: relative;
            padding: 8px 0;
            line-height: 1.2;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            width: 100%;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .btn-login {
            background: var(--cta);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-login:hover {
            background: var(--cta-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            width: 44px;
            height: 44px;
            border: none;
            background: none;
            cursor: pointer;
            flex-shrink: 0;
        }
        .menu-toggle .line {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .menu-toggle .dot {
            width: 8px;
            height: 8px;
            background: var(--cta);
            border-radius: 50%;
            transition: var(--transition);
        }

        /* ===== Category Hero ===== */
        .category-hero {
            padding: 120px 0 64px;
            background: linear-gradient(135deg, var(--primary-light), var(--bg-warm) 60%);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 60px;
            background: url('/assets/images/backpic/back-1.webp') center top / cover no-repeat;
            opacity: 0.15;
            -webkit-mask-image: linear-gradient(180deg, transparent, #000);
            mask-image: linear-gradient(180deg, transparent, #000);
            pointer-events: none;
        }
        .category-hero-inner {
            position: relative;
            z-index: 2;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .breadcrumb {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .breadcrumb span.sep {
            color: var(--text-muted);
        }
        .category-hero-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            color: var(--text-dark);
        }
        .category-hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .anchor-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .pill-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
        }
        .pill-link i {
            color: var(--primary);
            font-size: 13px;
        }
        .pill-link:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        /* ===== Content Sections ===== */
        .content-section {
            padding: 80px 0;
        }
        .content-section.alt-bg {
            background: var(--primary-light);
        }
        .content-section.white-bg {
            background: var(--bg-warm);
        }
        .content-block {
            padding: 40px 0;
            border-bottom: 1px solid var(--border);
        }
        .content-block:last-child {
            border-bottom: none;
        }
        .content-block-inner {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .content-block.reverse .content-block-inner {
            flex-direction: row-reverse;
        }
        .content-media {
            flex: 1;
            position: relative;
        }
        .content-media::before {
            content: "";
            position: absolute;
            top: 14px;
            left: 14px;
            right: -14px;
            bottom: -14px;
            background: var(--primary-light);
            border-radius: var(--radius-lg);
            z-index: 1;
        }
        .content-media img {
            position: relative;
            z-index: 2;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            width: 100%;
            height: auto;
            object-fit: cover;
            border: 1px solid rgba(227, 234, 231, 0.7);
        }
        .content-text {
            flex: 1;
        }
        .content-text .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 100px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .content-text h3 {
            font-size: 24px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        .content-text p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .feature-list {
            margin-top: 18px;
        }
        .feature-list li {
            position: relative;
            padding-left: 24px;
            font-size: 15px;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .feature-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 9px;
            width: 6px;
            height: 6px;
            background: var(--primary);
            transform: rotate(45deg);
            border-radius: 1px;
        }

        /* ===== Platform Badges ===== */
        .platform-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .platform-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid rgba(15, 156, 138, 0.15);
            transition: var(--transition);
        }
        .platform-badge:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Stats ===== */
        .stats-row {
            display: flex;
            gap: 16px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .stat-card {
            flex: 1;
            min-width: 120px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-value {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== Quick Start Steps ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .steps-grid {
            gap: 24px;
        }
        .step-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            position: relative;
            transition: var(--transition);
            text-align: left;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-item::before {
            content: "";
            position: absolute;
            top: 28px;
            right: -24px;
            width: 24px;
            height: 2px;
            background: var(--border);
        }
        .step-item:last-child::before {
            display: none;
        }
        .step-num {
            font-size: 40px;
            font-weight: 700;
            color: var(--primary-light);
            line-height: 1;
            margin-bottom: 16px;
            font-variant-numeric: tabular-nums;
            -webkit-text-stroke: 1px rgba(15, 156, 138, 0.4);
            position: relative;
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-dark);
        }
        .step-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.open {
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            user-select: none;
        }
        .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 500;
            transition: var(--transition);
            flex-shrink: 0;
            border: 1px solid rgba(15, 156, 138, 0.15);
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
            border-color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            padding-bottom: 24px;
        }

        /* ===== CTA Banner ===== */
        .cta-section {
            padding: 0 0 80px;
        }
        .cta-inner {
            background: linear-gradient(135deg, var(--primary), #0A695F);
            border-radius: var(--radius-lg);
            padding: 44px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .cta-text {
            position: relative;
            z-index: 2;
        }
        .cta-text h3 {
            font-size: 24px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }
        .cta-text p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }
        .cta-btn {
            position: relative;
            z-index: 2;
            background: var(--cta);
            color: #fff;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
        }
        .cta-btn:hover {
            background: var(--cta-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 123, 69, 0.35);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-bg);
            color: #fff;
            padding: 64px 0 0;
        }
        .footer-cols {
            margin-bottom: 48px;
        }
        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #0A695F);
            display: inline-block;
            position: relative;
        }
        .footer-logo-mark::before {
            content: "";
            position: absolute;
            inset: 6px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            margin: 16px 0 20px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer h4 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
            line-height: 1.5;
        }
        .site-footer ul li a:hover {
            color: var(--cta);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .dot {
            margin: 0 8px;
            opacity: 0.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .header-nav {
                gap: 18px;
                margin-left: 20px;
            }
            .content-block-inner {
                gap: 36px;
            }
            .content-block.reverse .content-block-inner {
                gap: 36px;
            }
            .cta-inner {
                padding: 36px 40px;
            }
        }

        @media (max-width: 767px) {
            .header-inner {
                padding: 0 16px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-warm);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 16px 24px 24px;
                margin: 0;
                box-shadow: 0 16px 32px rgba(31, 46, 58, 0.12);
                border-bottom: 1px solid var(--border);
                display: none;
                z-index: 998;
            }
            .header-nav.show {
                display: flex;
            }
            .nav-link {
                font-size: 18px;
                padding: 14px 0;
                width: 100%;
                border-bottom: 1px solid rgba(227, 234, 231, 0.6);
            }
            .nav-link:last-of-type {
                border-bottom: none;
            }
            .nav-link::after {
                bottom: 8px;
            }
            .header-actions .btn-login {
                padding: 8px 16px;
                font-size: 14px;
            }
            .category-hero {
                padding: 96px 0 48px;
            }
            .category-hero-title {
                font-size: 30px;
            }
            .category-hero-subtitle {
                font-size: 15px;
            }
            .content-section {
                padding: 56px 0;
            }
            .content-block {
                padding: 24px 0;
            }
            .content-block-inner,
            .content-block.reverse .content-block-inner {
                flex-direction: column;
                gap: 32px;
            }
            .content-media::before {
                top: 10px;
                left: 10px;
                right: -10px;
                bottom: -10px;
            }
            .content-text h3 {
                font-size: 21px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .steps-grid {
                gap: 16px;
            }
            .step-item {
                padding: 24px 20px;
            }
            .step-item::before {
                display: none;
            }
            .cta-section {
                padding: 0 0 56px;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }
            .cta-text p {
                font-size: 13px;
            }
            .cta-btn {
                width: 100%;
            }
            .stats-row {
                gap: 10px;
            }
            .stat-card {
                min-width: 90px;
                padding: 14px 10px;
            }
            .stat-value {
                font-size: 22px;
            }
            .site-footer {
                padding-top: 48px;
            }
            .footer-cols {
                margin-bottom: 32px;
            }
        }

        @media (max-width: 520px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                padding: 0 12px;
            }
            .logo-text {
                font-size: 18px;
            }
            .category-hero {
                padding: 88px 0 40px;
            }
            .category-hero-title {
                font-size: 26px;
            }
            .anchor-pills {
                gap: 8px;
            }
            .pill-link {
                padding: 8px 16px;
                font-size: 13px;
            }
            .content-text p {
                font-size: 14px;
            }
            .feature-list li {
                font-size: 14px;
            }
            .platform-badge {
                font-size: 13px;
                padding: 6px 12px;
            }
            .stats-row {
                flex-direction: column;
                gap: 10px;
            }
            .stat-card {
                min-width: 100%;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding-bottom: 18px;
            }
            .cta-inner {
                padding: 28px 20px;
            }
            .cta-text h3 {
                font-size: 20px;
            }
        }