/* roulang page: index */
:root {
            --bg: #F4F3EF;
            --surface: #FFFFFF;
            --ink: #121417;
            --muted: #6B7280;
            --brand: #C8FF2E;
            --brand-ink: #141617;
            --accent: #EF5B0B;
            --line: rgba(18, 20, 23, 0.08);
            --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
            --radius: 20px;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease-out, border-color 0.2s ease-out, background-color 0.2s ease-out, box-shadow 0.2s ease-out, transform 0.2s ease-out, opacity 0.2s ease-out;
        }

        a:hover {
            color: var(--brand-ink);
        }

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

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

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 96px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
        }

        h1,
        h2,
        h3,
        h4 {
            text-wrap: balance;
        }

        h1 {
            font-size: clamp(48px, 7vw, 88px);
            font-weight: 900;
            line-height: 1.05;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: clamp(30px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.15;
            position: relative;
            padding-left: 20px;
        }

        h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.12em;
            width: 4px;
            height: 0.76em;
            background-color: var(--brand);
            border-radius: 2px;
        }

        h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
        }

        h4 {
            font-size: 16px;
            font-weight: 600;
        }

        p {
            color: var(--muted);
            line-height: 1.75;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            white-space: nowrap;
            transition: all 0.2s ease-out;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn-primary {
            background-color: var(--brand);
            color: var(--brand-ink);
        }

        .btn-primary:hover {
            background-color: #d4ff5e;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 255, 46, 0.3);
            color: var(--brand-ink);
        }

        .btn-outline {
            background-color: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            border-color: #fff;
            background-color: rgba(255, 255, 255, 0.1);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-dark {
            background-color: var(--ink);
            color: var(--brand);
        }

        .btn-dark:hover {
            background-color: #2a2f36;
            transform: translateY(-2px);
            color: var(--brand);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .btn:focus-visible,
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--brand);
            outline-offset: 2px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.6;
        }

        .badge-brand {
            background-color: var(--brand);
            color: var(--brand-ink);
        }

        .badge-accent {
            background-color: var(--accent);
            color: #fff;
        }

        .badge-muted {
            background-color: rgba(0, 0, 0, 0.06);
            color: var(--muted);
        }

        .card {
            background-color: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.04), 0 16px 40px rgba(0, 0, 0, 0.1);
        }

        .card-pad {
            padding: 28px;
        }

        .post-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease-out;
        }

        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.04), 0 16px 40px rgba(0, 0, 0, 0.1);
        }

        .post-card img {
            width: 100%;
            object-fit: cover;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 9999px;
            background-color: rgba(0, 0, 0, 0.05);
            font-size: 13px;
            font-weight: 500;
            transition: all 0.2s ease-out;
        }

        .chip:hover {
            background-color: var(--brand);
            color: var(--brand-ink);
        }

        .stat-number {
            font-size: clamp(40px, 5vw, 64px);
            font-weight: 800;
            line-height: 1;
            color: var(--brand);
            font-variant-numeric: tabular-nums;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 48px;
            flex-wrap: wrap;
        }

        .section-head p {
            max-width: 420px;
            font-size: 15px;
        }

        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .reveal-delay-1 {
            transition-delay: 0.06s;
        }

        .reveal-delay-2 {
            transition-delay: 0.12s;
        }

        .reveal-delay-3 {
            transition-delay: 0.18s;
        }

        .reveal-delay-4 {
            transition-delay: 0.24s;
        }

        /* ===== Nav ===== */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 20px;
        }

        .nav-panel {
            max-width: min(1200px, 94vw);
            margin: 0 auto;
            background: #fff;
            border-radius: 20px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 12px 20px;
            transition: background-color 0.3s ease-out, box-shadow 0.3s ease-out, backdrop-filter 0.3s ease-out;
            border: 1px solid var(--line);
        }

        .site-header.scrolled .nav-panel {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 900;
            color: var(--ink);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.2;
        }

        .nav-logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--brand);
            flex-shrink: 0;
            box-shadow: 0 0 0 3px rgba(200, 255, 46, 0.25);
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 12px;
            background-color: rgba(0, 0, 0, 0.04);
            font-size: 14px;
            font-weight: 500;
            color: var(--ink);
            transition: all 0.2s ease-out;
            white-space: nowrap;
        }

        .nav-item i {
            font-size: 14px;
            color: var(--muted);
            transition: color 0.2s ease-out;
        }

        .nav-item:hover {
            background-color: rgba(0, 0, 0, 0.08);
            color: var(--ink);
        }

        .nav-item:hover i {
            color: var(--ink);
        }

        .nav-item.active {
            background-color: var(--brand);
            color: var(--brand-ink);
            font-weight: 600;
        }

        .nav-item.active i {
            color: var(--brand-ink);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--brand);
            color: var(--brand-ink);
            padding: 10px 20px;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s ease-out;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background-color: #d4ff5e;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(200, 255, 46, 0.4);
            color: var(--brand-ink);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background-color: rgba(0, 0, 0, 0.04);
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--ink);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 76px;
            left: 12px;
            right: 12px;
            z-index: 999;
            background: #fff;
            border-radius: 20px;
            box-shadow: var(--shadow-card);
            padding: 20px;
            border: 1px solid var(--line);
        }

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

        .mobile-nav-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px;
        }

        .mobile-nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px;
            border-radius: 12px;
            background-color: rgba(0, 0, 0, 0.04);
            font-weight: 500;
            font-size: 14px;
        }

        .mobile-nav-item.active {
            background-color: var(--brand);
            color: var(--brand-ink);
        }

        .mobile-nav-cta {
            margin-top: 16px;
            width: 100%;
            justify-content: center;
        }

        @media (max-width: 1024px) {
            .nav-center {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background-color: var(--ink);
            background-image: linear-gradient(to right, rgba(18, 20, 23, 0.95) 0%, rgba(18, 20, 23, 0.8) 40%, rgba(18, 20, 23, 0.5) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 160px 24px 80px;
        }

        .hero-content {
            max-width: var(--container);
            margin: 0 auto;
            width: 100%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(200, 255, 46, 0.15);
            border: 1px solid rgba(200, 255, 46, 0.4);
            color: var(--brand);
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 28px;
        }

        .hero h1 {
            color: #fff;
            max-width: 880px;
        }

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

        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin-top: 20px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 32px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            flex-wrap: wrap;
        }

        .hero-trust span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-trust .dot-sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.4);
        }

        .scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 12px;
            letter-spacing: 0.1em;
            animation: bounce-down 2s ease-in-out infinite;
        }

        @keyframes bounce-down {
            0%,
            100% {
                transform: translate(-50%, 0);
            }
            50% {
                transform: translate(-50%, 8px);
            }
        }

        /* ===== Quick Feature Bar ===== */
        .quick-bar {
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }

        .quick-bar-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            background: #fff;
            border-radius: 24px;
            padding: 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line);
        }

        .quick-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 12px;
            border-radius: 16px;
            transition: all 0.2s ease-out;
        }

        .quick-item:hover {
            background-color: rgba(0, 0, 0, 0.03);
        }

        .quick-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background-color: rgba(200, 255, 46, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--brand-ink);
            flex-shrink: 0;
        }

        .quick-text h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .quick-text p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .quick-bar-grid {
                grid-template-columns: 1fr;
                padding: 16px;
            }
        }

        /* ===== Feature Cards ===== */
        .features-section {
            padding-top: 96px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            position: relative;
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            padding: 28px;
            overflow: hidden;
            transition: all 0.2s ease-out;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.04), 0 16px 40px rgba(0, 0, 0, 0.12);
        }

        .feature-num {
            position: absolute;
            top: 12px;
            right: 20px;
            font-size: 64px;
            font-weight: 900;
            color: rgba(18, 20, 23, 0.08);
            line-height: 1;
            transition: color 0.2s ease-out;
        }

        .feature-card:hover .feature-num {
            color: var(--brand);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
            background-color: rgba(18, 20, 23, 0.05);
            color: var(--ink);
        }

        .feature-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            line-height: 1.7;
        }

        .feature-corner {
            position: absolute;
            right: -12px;
            bottom: -12px;
            width: 0;
            height: 0;
            border: 0;
            border-bottom: 24px solid var(--brand);
            border-left: 24px solid transparent;
            opacity: 0;
            transition: opacity 0.2s ease-out;
        }

        .feature-card:hover .feature-corner {
            opacity: 1;
        }

        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Showcase ===== */
        .showcase-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 96px;
        }

        .showcase-block:last-child {
            margin-bottom: 0;
        }

        .showcase-img {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line);
        }

        .showcase-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .showcase-tag {
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .showcase-tag::before {
            content: '';
            width: 20px;
            height: 2px;
            background-color: var(--brand);
        }

        .showcase-block h3 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .showcase-block p {
            margin-bottom: 12px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            color: var(--ink);
            border-bottom: 2px solid var(--brand);
            padding-bottom: 2px;
            transition: all 0.2s ease-out;
        }

        .text-link:hover {
            gap: 12px;
            color: var(--ink);
            border-bottom-color: var(--ink);
        }

        @media (max-width: 768px) {
            .showcase-block {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 64px;
            }
        }

        /* ===== Proof / Stats ===== */
        .proof-section {
            background-color: var(--ink);
            color: #fff;
            padding: 96px 0;
        }

        .proof-section h2 {
            color: #fff;
        }

        .proof-section h2::before {
            background-color: var(--brand);
        }

        .proof-section .section-head p {
            color: rgba(255, 255, 255, 0.6);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 80px;
        }

        .stat-item {
            text-align: left;
            padding: 24px;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 12px;
            font-weight: 500;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: #fff;
            border-radius: 20px;
            padding: 32px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
        }

        .testimonial-card .stars {
            color: #F5B301;
            font-size: 14px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .testimonial-card .quote {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ink);
            margin-bottom: 20px;
            font-weight: 500;
        }

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

        .testimonial-card .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--brand-ink);
        }

        .testimonial-card .author-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
        }

        .testimonial-card .author-role {
            font-size: 12px;
            color: var(--muted);
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                margin-bottom: 48px;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Pricing ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .pricing-card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: all 0.2s ease-out;
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06), 0 24px 56px rgba(0, 0, 0, 0.12);
        }

        .pricing-card.featured {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(200, 255, 46, 0.2), var(--shadow-card);
            transform: scale(1.02);
        }

        .pricing-card.featured:hover {
            transform: scale(1.02) translateY(-4px);
        }

        .pricing-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--brand);
            color: var(--brand-ink);
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 700;
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(200, 255, 46, 0.4);
        }

        .plan-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .plan-price {
            font-size: 48px;
            font-weight: 900;
            color: var(--ink);
            line-height: 1.1;
            margin-bottom: 4px;
            font-variant-numeric: tabular-nums;
        }

        .plan-price .currency {
            font-size: 24px;
            font-weight: 700;
            vertical-align: top;
            margin-right: 4px;
        }

        .plan-period {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 24px;
        }

        .plan-features {
            list-style: none;
            margin-bottom: 32px;
            flex-grow: 1;
        }

        .plan-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--ink);
            line-height: 1.6;
        }

        .plan-features li i {
            color: var(--brand-ink);
            background-color: rgba(200, 255, 46, 0.3);
            border-radius: 50%;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .plan-features li.disabled {
            color: var(--muted);
            text-decoration: line-through;
        }

        .plan-features li.disabled i {
            background-color: rgba(0, 0, 0, 0.04);
            color: var(--muted);
        }

        @media (max-width: 1024px) {
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }
            .pricing-card.featured {
                transform: scale(1);
            }
            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }
        }

        /* ===== Blog/News ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }

        .news-main-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .news-main-card:hover {
            transform: translateY(-4px);
        }

        .news-main-card .cover {
            height: 280px;
            overflow: hidden;
        }

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

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

        .news-main-card .news-content {
            padding: 24px;
        }

        .news-main-card h3 {
            font-size: 22px;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-main-card p {
            font-size: 14px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--muted);
        }

        .news-side-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-side-item {
            display: flex;
            gap: 16px;
            background: var(--surface);
            border-radius: 16px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            padding: 16px;
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .news-side-item:hover {
            transform: translateX(4px);
            border-color: rgba(200, 255, 46, 0.6);
        }

        .news-side-thumb {
            width: 96px;
            height: 96px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .news-side-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-side-info {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-side-info .news-date {
            font-size: 12px;
            color: var(--muted);
            margin-bottom: 4px;
        }

        .news-side-info h4 {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
            color: var(--ink);
        }

        .news-side-info .news-summary {
            font-size: 12px;
            color: var(--muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-side-info .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 6px;
        }

        .news-tag {
            font-size: 11px;
            font-weight: 500;
            color: var(--muted);
            background-color: rgba(0, 0, 0, 0.04);
            padding: 2px 10px;
            border-radius: 9999px;
        }

        .news-empty {
            grid-column: 1 / -1;
            border: 2px dashed var(--line);
            border-radius: var(--radius);
            padding: 60px 24px;
            text-align: center;
            color: var(--muted);
            font-size: 15px;
            background-color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 1024px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
            .news-main-card .cover {
                height: 200px;
            }
        }

        @media (max-width: 480px) {
            .news-side-item {
                flex-direction: column;
            }
            .news-side-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--surface);
            border-radius: 16px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow 0.2s ease-out;
        }

        .faq-item:hover {
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.04), 0 12px 32px rgba(0, 0, 0, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            width: 100%;
            text-align: left;
        }

        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            flex: 1;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(0, 0, 0, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--ink);
            flex-shrink: 0;
            transition: transform 0.3s ease-out, background-color 0.3s ease-out;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background-color: var(--brand);
            color: var(--brand-ink);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }

        .faq-answer-inner {
            padding-top: 16px;
            padding-right: 40px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background-color: var(--brand);
            border-radius: 32px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section h2 {
            color: var(--brand-ink);
            font-size: clamp(30px, 4vw, 48px);
            padding-left: 0;
            margin-bottom: 16px;
        }

        .cta-section h2::before {
            display: none;
        }

        .cta-section p {
            color: rgba(20, 22, 23, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 16px;
        }

        .cta-section .btn {
            background-color: var(--ink);
            color: var(--brand);
        }

        .cta-section .btn:hover {
            background-color: #2a2f36;
            transform: translateY(-2px);
            color: var(--brand);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 24px;
                border-radius: 24px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: #121417;
            color: #fff;
            padding: 64px 0 0;
            margin-top: 96px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s ease-out;
        }

        .footer-col a:hover {
            color: var(--brand);
        }

        .footer-bottom {
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Floating CTA ===== */
        .floating-cta {
            position: fixed;
            right: 32px;
            bottom: 32px;
            z-index: 900;
            background-color: var(--brand);
            color: var(--brand-ink);
            padding: 16px 28px;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 8px 32px rgba(200, 255, 46, 0.4);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.3s ease-out;
            animation: float-cta 4s ease-in-out infinite 0.5s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .floating-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .floating-cta:hover {
            background-color: #d4ff5e;
            color: var(--brand-ink);
        }

        @keyframes float-cta {
            0%,
            100% {
                translate: 0 0;
            }
            50% {
                translate: 0 -8px;
            }
        }

        @media (max-width: 768px) {
            .floating-cta {
                right: 16px;
                bottom: 16px;
                padding: 14px 20px;
            }
        }

        .card-category {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--line);
            background-color: var(--surface);
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease-out;
        }

        .card-category:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08), 0 24px 48px rgba(0, 0, 0, 0.12);
        }

/* roulang page: article */
:root {
            --bg: #F4F3EF;
            --surface: #FFFFFF;
            --ink: #121417;
            --muted: #6B7280;
            --brand: #C8FF2E;
            --brand-ink: #141617;
            --accent: #EF5B0B;
            --line: rgba(18,20,23,0.08);
            --shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
            --radius: 20px;
            --container: 1200px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }

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

        a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
        img { max-width: 100%; display: block; }
        button { font-family: inherit; }
        ul, ol { list-style: none; }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 隐藏 H1 但保留SEO（因为页面已用 H1 显示文章标题） */
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
        }

        /* ===== 导航面板 ===== */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            pointer-events: none;
        }

        .nav-panel {
            max-width: min(1200px, 94vw);
            margin: 0 auto;
            background: var(--surface);
            border-radius: 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 16px;
            pointer-events: auto;
            transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
        }

        .site-header.scrolled .nav-panel {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

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

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 20px;
            color: var(--ink);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo-dot {
            width: 16px;
            height: 16px;
            background: var(--brand);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(200,255,46,0.5);
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink);
            background: rgba(18,20,23,0.05);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-item:hover {
            background: rgba(18,20,23,0.09);
            transform: translateY(-1px);
        }

        .nav-item.active {
            background: var(--brand);
            color: var(--brand-ink);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(200,255,46,0.25);
        }

        .nav-item i { font-size: 14px; }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-cta {
            background: var(--brand);
            color: var(--brand-ink);
            border-radius: 9999px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(200,255,46,0.4);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--ink);
            cursor: pointer;
            padding: 6px;
            border-radius: 10px;
            transition: background 0.2s ease;
        }

        .nav-toggle:hover { background: rgba(18,20,23,0.06); }

        /* 移动端导航 */
        @media (max-width: 768px) {
            .nav-center {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 24px;
                right: 24px;
                background: var(--surface);
                border-radius: 20px;
                box-shadow: var(--shadow-card);
                border: 1px solid var(--line);
                padding: 16px;
                flex-direction: column;
                gap: 8px;
                z-index: 1001;
            }

            .nav-center.open {
                display: flex;
                animation: navFadeIn 0.25s ease-out;
            }

            .nav-center .nav-item {
                width: 100%;
                justify-content: center;
                padding: 12px 14px;
                font-size: 15px;
            }

            .nav-toggle { display: block; }
        }

        @keyframes navFadeIn {
            from { opacity: 0; transform: translateY(-8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding-top: 110px;
            padding-bottom: 16px;
        }

        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li + li::before {
            content: '>';
            color: rgba(18,20,23,0.25);
            font-size: 12px;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover { color: var(--brand-ink); }
        .breadcrumb .current {
            color: var(--muted);
            font-weight: 500;
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章头部 ===== */
        .article-header {
            max-width: 900px;
            margin: 0 auto;
            padding: 24px 24px 8px;
        }

        .article-title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-align: left;
            text-wrap: balance;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 24px;
        }

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

        .meta-item i { font-size: 13px; color: rgba(18,20,23,0.4); }

        .meta-category {
            background: var(--brand);
            color: var(--brand-ink);
            padding: 4px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }

        .article-share {
            display: flex;
            gap: 8px;
            margin-left: auto;
        }

        .share-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(18,20,23,0.05);
            border-radius: 9999px;
            font-size: 14px;
            color: var(--ink);
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
        }

        .share-btn:hover {
            background: var(--brand);
            color: var(--brand-ink);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(200,255,46,0.3);
        }

        /* ===== 正文区 ===== */
        .article-body-wrap {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 24px 48px;
        }

        .article-body {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow-card);
            font-size: 15px;
            line-height: 1.85;
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 800;
            margin: 36px 0 18px;
            padding-left: 16px;
            border-left: 4px solid var(--brand);
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 28px 0 14px;
            line-height: 1.4;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 20px 0 10px;
        }

        .article-body p {
            margin-bottom: 16px;
            font-size: 15px;
            line-height: 1.85;
        }

        .article-body img {
            border-radius: 16px;
            margin: 24px 0;
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .article-body blockquote {
            border-left: 4px solid var(--brand);
            background: rgba(200,255,46,0.08);
            padding: 16px 20px;
            margin: 28px 0;
            border-radius: 0 12px 12px 0;
            color: var(--muted);
            font-style: normal;
        }

        .article-body blockquote p { margin-bottom: 0; }

        .article-body ul,
        .article-body ol {
            margin: 16px 0;
            padding-left: 24px;
        }

        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }

        .article-body li {
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            border-radius: 12px;
            overflow: hidden;
            font-size: 14px;
        }

        .article-body th {
            background: rgba(18,20,23,0.06);
            padding: 12px 16px;
            font-weight: 600;
            text-align: left;
            white-space: nowrap;
        }

        .article-body td {
            padding: 12px 16px;
            border-top: 1px solid var(--line);
        }

        .article-body tr:hover td { background: rgba(18,20,23,0.02); }

        .article-body code {
            background: rgba(18,20,23,0.06);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 13px;
            font-family: "SF Mono", "Fira Code", monospace;
        }

        .article-body pre {
            background: var(--ink);
            color: #ECEFF1;
            padding: 20px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 28px 0;
            line-height: 1.6;
            font-size: 13px;
        }

        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        .article-body a {
            color: var(--brand-ink);
            border-bottom: 1px solid var(--brand);
            padding-bottom: 1px;
        }

        .article-body a:hover { background: var(--brand); }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--line);
            margin: 36px 0;
        }

        /* ===== 标签区 ===== */
        .article-tags {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 24px 36px;
        }

        .tags-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        .tag-pill {
            background: rgba(18,20,23,0.06);
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 13px;
            color: var(--ink);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag-pill:hover {
            background: var(--brand);
            color: var(--brand-ink);
            transform: translateY(-1px);
        }

        /* ===== 相关推荐 ===== */
        .related-posts {
            max-width: 900px;
            margin: 0 auto;
            padding: 40px 24px 16px;
        }

        .related-title {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background: var(--brand);
            border-radius: 2px;
            flex-shrink: 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.2s ease;
            display: block;
        }

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

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

        .related-card .card-img-wrap {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 9;
            background: var(--ink);
        }

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

        .related-card .card-body {
            padding: 18px 20px;
        }

        .related-card .card-body h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-date {
            font-size: 13px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* ===== 返回入口 ===== */
        .article-links {
            max-width: 900px;
            margin: 0 auto;
            padding: 24px 24px 72px;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1.5px solid var(--ink);
            padding: 10px 24px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink);
            transition: all 0.2s ease;
            background: transparent;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: var(--ink);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: var(--brand-ink);
            padding: 10px 24px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(200,255,46,0.35);
        }

        .prev-next-links {
            display: flex;
            gap: 12px;
        }

        .prev-next-links a {
            font-size: 14px;
            color: var(--muted);
            padding: 8px 16px;
            border-radius: 9999px;
            background: rgba(18,20,23,0.04);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .prev-next-links a:hover {
            background: var(--brand);
            color: var(--brand-ink);
        }

        /* ===== 内容未找到 ===== */
        .not-found {
            max-width: 600px;
            margin: 140px auto 80px;
            text-align: center;
            padding: 56px 40px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 20px;
            box-shadow: var(--shadow-card);
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            background: rgba(200,255,46,0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--brand-ink);
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--muted);
            margin-bottom: 28px;
            font-size: 15px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--ink);
            color: rgba(255,255,255,0.7);
            padding: 64px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 14px;
            font-size: 22px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col a {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            transition: color 0.2s ease;
        }

        .footer-col a:hover { color: var(--brand); }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }

        .footer-bottom a {
            color: rgba(255,255,255,0.4);
            transition: color 0.2s ease;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

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

            .article-body {
                padding: 24px 20px;
            }

            .article-share {
                margin-left: 0;
            }

            .article-links {
                flex-direction: column;
                align-items: flex-start;
            }

            .prev-next-links {
                width: 100%;
                justify-content: space-between;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }

            .article-meta {
                gap: 8px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-share {
                margin-left: 0;
                margin-top: 8px;
            }

            .article-body {
                padding: 20px 16px;
                border-radius: 16px;
            }

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

            .related-posts,
            .article-links,
            .article-tags,
            .article-body-wrap,
            .article-header {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                padding: 0 12px;
            }

            .breadcrumb {
                padding-top: 100px;
            }
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.5s ease-out, transform 0.5s ease-out;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #F4F3EF;
            --surface: #FFFFFF;
            --ink: #121417;
            --muted: #6B7280;
            --brand: #C8FF2E;
            --brand-ink: #141617;
            --accent: #EF5B0B;
            --line: rgba(18, 20, 23, 0.08);
            --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
            --radius: 20px;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 96px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
        }

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

        .section-head h2 {
            font-size: clamp(30px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            position: relative;
            padding-left: 20px;
            margin-bottom: 12px;
            text-wrap: balance;
        }

        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--brand);
            border-radius: 2px;
        }

        .section-head p {
            color: var(--muted);
            font-size: 15px;
            max-width: 660px;
        }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 100;
            display: flex;
            justify-content: center;
            padding: 0 24px;
            pointer-events: none;
        }

        .nav-panel {
            width: min(1200px, 94vw);
            background: rgba(255, 255, 255, 0.95);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 14px;
            pointer-events: auto;
            border: 1px solid var(--line);
            transition: background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .site-header.scrolled .nav-panel {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-color: rgba(18, 20, 23, 0.05);
        }

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

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.01em;
        }

        .nav-logo-dot {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--brand);
            display: inline-block;
            flex-shrink: 0;
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 14px;
            border-radius: 12px;
            background: rgba(18, 20, 23, 0.04);
            color: var(--ink);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-item i {
            font-size: 14px;
            opacity: 0.7;
        }

        .nav-item:hover {
            background: rgba(18, 20, 23, 0.08);
            color: var(--ink);
            transform: translateY(-1px);
        }

        .nav-item.active {
            background: var(--brand);
            color: var(--brand-ink);
        }

        .nav-item.active i {
            opacity: 1;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 9999px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 14px;
            font-weight: 700;
            transition: all 0.2s ease;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(200, 255, 46, 0.35);
            color: var(--brand-ink);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(18, 20, 23, 0.04);
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--ink);
            transition: background 0.2s ease;
        }

        .nav-toggle:hover {
            background: rgba(18, 20, 23, 0.08);
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 0 14px;
            }

            .nav-panel {
                padding: 8px 12px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-center {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                background: #fff;
                border-radius: 16px;
                box-shadow: var(--shadow-card);
                border: 1px solid var(--line);
                padding: 16px;
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .nav-center.open {
                display: grid;
            }

            .nav-item {
                justify-content: center;
                padding: 12px 10px;
                font-size: 13px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        /* 分类横幅 */
        .category-hero {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            background: linear-gradient(90deg, rgba(18, 20, 23, 0.88) 0%, rgba(18, 20, 23, 0.55) 60%, rgba(18, 20, 23, 0.35) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            padding-top: 120px;
        }

        .category-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 9999px;
            margin-bottom: 20px;
            width: fit-content;
        }

        .category-hero h1 {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-wrap: balance;
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin-bottom: 24px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-meta span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        /* 数据条 */
        .data-strip-section {
            padding: 48px 0 0;
            margin-top: -40px;
            position: relative;
            z-index: 2;
        }

        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            padding: 32px;
        }

        .data-item {
            text-align: center;
            padding: 8px 0;
        }

        .data-item .num {
            font-size: clamp(40px, 5vw, 64px);
            font-weight: 800;
            line-height: 1.1;
            color: var(--ink);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.03em;
        }

        .data-item .num em {
            font-style: normal;
            color: var(--accent);
            font-size: 0.5em;
            vertical-align: super;
            margin-left: 2px;
            font-weight: 700;
        }

        .data-item .label {
            font-size: 14px;
            color: var(--muted);
            margin-top: 8px;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                padding: 24px;
                gap: 16px;
            }

            .data-item .num {
                font-size: 40px;
            }
        }

        /* 内容卡网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
            border-color: rgba(200, 255, 46, 0.6);
        }

        .content-card .card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #ececea;
        }

        .content-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .date-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 9999px;
            letter-spacing: 0.02em;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .content-card .card-body {
            padding: 24px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .content-card .card-cat {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
        }

        .content-card h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .content-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 20px;
        }

        .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            transition: color 0.2s ease, gap 0.2s ease;
        }

        .card-link i {
            font-size: 12px;
            transition: transform 0.2s ease;
        }

        .content-card:hover .card-link {
            color: #000;
        }

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

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }

            .content-card .card-body {
                padding: 20px;
            }
        }

        /* 特色大卡 */
        .feature-card {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            background: var(--surface);
            border-radius: 24px;
            border: 1px solid var(--line);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }

        .feature-card:hover {
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
            transform: translateY(-2px);
        }

        .feature-card .feature-img {
            position: relative;
            min-height: 300px;
            overflow: hidden;
            background: #ececea;
        }

        .feature-card .feature-img img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-card .feature-body {
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .feature-card .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            width: fit-content;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 9999px;
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-wrap: balance;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 24px;
            border-radius: 9999px;
            background: var(--ink);
            color: #fff;
            width: fit-content;
            transition: all 0.2s ease;
        }

        .feature-link:hover {
            background: #000;
            color: var(--brand);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(18, 20, 23, 0.25);
        }

        @media (max-width: 900px) {
            .feature-card {
                grid-template-columns: 1fr;
            }

            .feature-card .feature-img {
                min-height: 220px;
            }

            .feature-card .feature-body {
                padding: 28px;
            }
        }

        /* 为什么值得信赖 */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .why-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .why-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
            border-color: rgba(200, 255, 46, 0.6);
        }

        .why-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(200, 255, 46, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--ink);
            margin-bottom: 20px;
        }

        .why-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .why-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        @media (max-width: 900px) {
            .why-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 24px 28px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            transition: border-color 0.2s ease;
        }

        .faq-item.open {
            border-color: rgba(200, 255, 46, 0.5);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 16px;
        }

        .faq-question h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            flex: 1;
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(18, 20, 23, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--muted);
            flex-shrink: 0;
            transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand);
            color: var(--brand-ink);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-top: 16px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
        }

        /* CTA */
        .cta-banner {
            background: var(--brand);
            border-radius: 28px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            color: var(--brand-ink);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 14px;
        }

        .cta-banner p {
            font-size: 15px;
            color: rgba(20, 22, 23, 0.7);
            margin-bottom: 28px;
        }

        .btn-dark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--ink);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 9999px;
            transition: all 0.2s ease;
        }

        .btn-dark:hover {
            background: #000;
            color: var(--brand);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        @media (max-width: 640px) {
            .cta-banner {
                padding: 40px 24px;
                border-radius: 20px;
            }
        }

        /* 页脚 */
        .site-footer {
            background: #121417;
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
            margin-top: 96px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--brand);
        }

        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

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

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }

            .footer-brand {
                grid-column: span 1;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* 浮动 CTA */
        .float-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 90;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 15px;
            font-weight: 700;
            padding: 14px 24px;
            border-radius: 9999px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
            animation: floatY 4s ease-in-out infinite;
        }

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

        .float-cta:hover {
            color: var(--brand-ink);
            box-shadow: 0 8px 32px rgba(200, 255, 46, 0.4);
        }

        @keyframes floatY {
            0%,
            100% {
                margin-bottom: 0;
            }
            50% {
                margin-bottom: 8px;
            }
        }

        @media (max-width: 640px) {
            .float-cta {
                bottom: 20px;
                right: 20px;
                padding: 12px 20px;
                font-size: 14px;
            }
        }

        /* 滚动入场 */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .reveal-delay-1 {
            transition-delay: 0.06s;
        }

        .reveal-delay-2 {
            transition-delay: 0.12s;
        }

        .reveal-delay-3 {
            transition-delay: 0.18s;
        }

        .reveal-delay-4 {
            transition-delay: 0.24s;
        }

/* roulang page: category2 */
:root {
            --bg: #F4F3EF;
            --surface: #FFFFFF;
            --ink: #121417;
            --muted: #6B7280;
            --brand: #C8FF2E;
            --brand-ink: #141617;
            --accent: #EF5B0B;
            --line: rgba(18, 20, 23, 0.08);
            --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
            --radius: 20px;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease-out, background .2s ease-out, border-color .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
        }

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

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ---------- 导航 ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 20px 0;
            pointer-events: none;
        }

        .site-header.scrolled .nav-panel {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
        }

        .nav-panel {
            pointer-events: auto;
            max-width: min(1200px, 94vw);
            margin: 0 auto;
            background: var(--surface);
            border-radius: 20px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 18px;
            gap: 14px;
            border: 1px solid var(--line);
            transition: background .3s ease, box-shadow .3s ease;
        }

        .nav-left {
            flex-shrink: 0;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--ink);
        }

        .nav-logo-dot {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--brand);
            display: inline-block;
            flex-shrink: 0;
        }

        .nav-center {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 12px;
            background: #F4F3EF;
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            text-decoration: none;
            transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out;
        }

        .nav-item i {
            font-size: 14px;
            color: var(--muted);
            transition: color .2s ease-out;
        }

        .nav-item:hover {
            background: #E9E7E1;
        }

        .nav-item.active {
            background: var(--brand);
            color: var(--brand-ink);
        }

        .nav-item.active i {
            color: var(--brand-ink);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 20px;
            border-radius: 9999px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 14px;
            font-weight: 700;
            text-decoration: none;
            transition: transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(200, 255, 46, 0.35);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: #F4F3EF;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--ink);
        }

        /* ---------- 分类横幅 Hero ---------- */
        .category-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            background: linear-gradient(90deg, rgba(18, 20, 23, 0.92) 0%, rgba(18, 20, 23, 0.72) 40%, rgba(18, 20, 23, 0.45) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            padding: 120px 0 72px;
            margin-bottom: 0;
        }

        .category-hero h1 {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            text-wrap: balance;
            margin-bottom: 16px;
        }

        .category-hero h1 .brand-text {
            color: var(--brand);
        }

        .category-hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 560px;
            margin-bottom: 28px;
            line-height: 1.75;
        }

        .hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 9999px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 15px;
            font-weight: 700;
            border: 2px solid var(--brand);
            transition: transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(200, 255, 46, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 9999px;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            transition: border-color .2s ease-out, background .2s ease-out;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(200, 255, 46, 0.08);
        }

        /* ---------- 通用区块 ---------- */
        .section-padding {
            padding: 96px 0;
        }

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

        .section-head h2 {
            font-size: clamp(30px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            position: relative;
            padding-left: 28px;
            text-wrap: balance;
        }

        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 24px;
            background: var(--brand);
            border-radius: 4px;
        }

        .section-head .sub-desc {
            margin-top: 14px;
            color: var(--muted);
            font-size: 15px;
            max-width: 640px;
        }

        /* ---------- 内容卡网格 ---------- */
        .analysis-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .analysis-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease-out, box-shadow .2s ease-out;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .analysis-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
        }

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

        .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

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

        .badge-date {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 9999px;
            letter-spacing: 0.02em;
        }

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

        .analysis-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--ink);
        }

        .analysis-card-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 700;
            color: var(--ink);
        }

        .card-link i {
            font-size: 12px;
            transition: transform .2s ease-out;
        }

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

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

        /* ---------- 特色内容带 ---------- */
        .feature-showcase {
            background: var(--ink);
            color: #fff;
            border-radius: 24px;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            box-shadow: var(--shadow-card);
        }

        .feature-showcase .feature-img {
            position: relative;
            min-height: 300px;
        }

        .feature-showcase .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .feature-showcase .feature-content {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .feature-tag {
            align-self: flex-start;
            background: var(--brand);
            color: var(--brand-ink);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 9999px;
            margin-bottom: 18px;
        }

        .feature-content h3 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
            color: #fff;
        }

        .feature-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            line-height: 1.75;
            margin-bottom: 24px;
        }

        .feature-content .btn-primary {
            align-self: flex-start;
        }

        /* ---------- 数据证据区 ---------- */
        .stats-band {
            background: var(--ink);
            border-radius: 24px;
            padding: 56px 48px;
            color: #fff;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 96px;
        }

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

        .stat-number {
            font-size: clamp(40px, 5vw, 64px);
            font-weight: 800;
            color: var(--brand);
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
        }

        .stat-label {
            margin-top: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ---------- 流程 ---------- */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 16px;
        }

        .flow-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            position: relative;
            transition: transform .2s ease-out, box-shadow .2s ease-out;
        }

        .flow-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
        }

        .flow-step {
            font-size: 14px;
            font-weight: 800;
            color: var(--brand-ink);
            background: var(--brand);
            display: inline-block;
            padding: 4px 14px;
            border-radius: 9999px;
            margin-bottom: 20px;
        }

        .flow-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .flow-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ---------- FAQ ---------- */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 24px 28px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            transition: border-color .2s ease-out;
        }

        .faq-item.active {
            border-color: rgba(200, 255, 46, 0.6);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
        }

        .faq-question h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.5;
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #F4F3EF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--ink);
            flex-shrink: 0;
            transition: transform .3s ease-out, background .2s ease-out;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--brand);
            color: var(--brand-ink);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease-out;
        }

        .faq-answer p {
            padding-top: 14px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.75;
            border-top: 1px solid var(--line);
            margin-top: 14px;
        }

        /* ---------- CTA ---------- */
        .cta-block {
            background: var(--brand);
            border-radius: 24px;
            padding: 64px 56px;
            text-align: center;
            margin: 96px 0;
        }

        .cta-block h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 900;
            color: var(--brand-ink);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .cta-block p {
            color: rgba(20, 22, 23, 0.7);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .btn-dark {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: 9999px;
            background: var(--brand-ink);
            color: var(--brand);
            font-size: 15px;
            font-weight: 700;
            transition: transform .2s ease-out, box-shadow .2s ease-out;
        }

        .btn-dark:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(18, 20, 23, 0.25);
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: #121417;
            color: rgba(255, 255, 255, 0.8);
            padding: 80px 0 40px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            max-width: 280px;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color .2s ease-out;
        }

        .footer-col a:hover {
            color: var(--brand);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

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

        /* ---------- 浮动 CTA ---------- */
        .floating-cta {
            position: fixed;
            right: 32px;
            bottom: 32px;
            background: var(--brand);
            color: var(--brand-ink);
            padding: 14px 26px;
            border-radius: 9999px;
            font-size: 15px;
            font-weight: 700;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: opacity .3s ease-out, transform .3s ease-out, visibility .3s ease-out;
            z-index: 999;
            animation: floatY 4s ease-in-out infinite;
        }

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

        .floating-cta:hover {
            background: #d8ff5a;
        }

        @keyframes floatY {
            0%,
            100% {
                margin-bottom: 0;
            }
            50% {
                margin-bottom: 8px;
            }
        }

        /* ---------- 滚动入场 ---------- */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity .6s ease-out, transform .6s ease-out;
        }

        .reveal.in-view {
            opacity: 1;
            transform: translateY(0);
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

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

            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                padding: 48px 32px;
            }

            .feature-showcase {
                grid-template-columns: 1fr;
            }

            .feature-showcase .feature-img {
                min-height: 240px;
            }

            .feature-showcase .feature-img img {
                position: static;
                height: 240px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 10px 12px 0;
            }

            .nav-panel {
                padding: 8px 12px;
            }

            .nav-center {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 12px;
                right: 12px;
                background: #fff;
                border-radius: 20px;
                box-shadow: var(--shadow-card);
                padding: 16px;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                border: 1px solid var(--line);
            }

            .nav-center.open {
                display: flex;
            }

            .nav-item {
                width: 100%;
                justify-content: center;
                padding: 12px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .nav-cta span {
                display: none;
            }

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

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

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

            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
                padding: 40px 24px;
                margin-top: 64px;
            }

            .feature-showcase .feature-content {
                padding: 32px 24px;
            }

            .cta-block {
                padding: 48px 24px;
                margin: 64px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .floating-cta {
                right: 16px;
                bottom: 16px;
                padding: 12px 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .category-hero {
                min-height: 300px;
                padding: 100px 0 48px;
            }

            .category-hero .hero-btn-group {
                flex-direction: column;
                width: 100%;
            }

            .category-hero .hero-btn-group .btn-primary,
            .category-hero .hero-btn-group .btn-outline {
                justify-content: center;
                width: 100%;
            }

            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
                padding: 32px 20px;
            }

            .stat-number {
                font-size: 32px;
            }

            .section-head h2 {
                padding-left: 20px;
            }

            .section-head h2::before {
                height: 20px;
            }
        }