/* roulang page: index */
:root {
            --color-primary: #3a5bef;
            --color-primary-dark: #2b43d6;
            --color-accent: #f5d76e;
            --color-dark: #0a0e27;
            --color-dark-2: #111735;
            --color-text: #1e2340;
            --color-text-soft: #5a607d;
            --color-border: #e2e6f0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(10,14,39,0.06);
            --shadow-md: 0 6px 24px rgba(10,14,39,0.08);
            --shadow-lg: 0 12px 40px rgba(10,14,39,0.12);
            --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: #ffffff;
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(58,91,239,0.45);
            outline-offset: 2px;
        }
        .container-x {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: 88px 0;
        }
        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            color: var(--color-text);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-soft);
            max-width: 640px;
            line-height: 1.7;
        }
        .badge-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, rgba(58,91,239,0.08), rgba(245,215,110,0.12));
            border: 1px solid rgba(58,91,239,0.18);
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #3a5bef 0%, #2b43d6 100%);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 999px;
            border: none;
            cursor: pointer;
            transition: all 0.35s ease;
            box-shadow: 0 4px 16px rgba(58,91,239,0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(58,91,239,0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(58,91,239,0.25);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1.5px solid rgba(255,255,255,0.6);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 999px;
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
            cursor: pointer;
            transition: all 0.35s ease;
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.15);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-2px);
        }
        .card-base {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
        }
        .card-base:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .glass-card {
            background: rgba(255,255,255,0.07);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-lg);
            transition: all 0.4s ease;
        }
        .glass-card:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.25);
        }
        /* Nav */
        .site-header {
            background: rgba(10,14,39,0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all 0.4s ease;
        }
        .site-header.scrolled {
            background: rgba(7,10,30,0.96);
            border-bottom-color: rgba(255,255,255,0.12);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-center-logo {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            text-align: center;
            z-index: 2;
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: #ffffff;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--color-accent);
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-link {
            font-size: 0.93rem;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            white-space: nowrap;
            padding: 6px 0;
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link.active {
            color: var(--color-accent);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, #3a5bef, #5b7ffa);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 999px;
            border: 1px solid rgba(255,255,255,0.15);
            transition: all 0.3s ease;
        }
        .nav-cta-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(58,91,239,0.4);
            color: #fff;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 8px;
            color: #fff;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 20;
            font-size: 1.2rem;
        }
        .mobile-menu-panel {
            display: none;
            background: rgba(10,14,39,0.98);
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 999;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }
        .mobile-menu-panel.open {
            display: block;
        }
        .mobile-menu-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding: 0 24px;
        }
        .mobile-menu-links a {
            color: rgba(255,255,255,0.85);
            font-size: 1rem;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: 10px;
            transition: all 0.3s ease;
        }
        .mobile-menu-links a:hover,
        .mobile-menu-links a.active {
            background: rgba(255,255,255,0.08);
            color: var(--color-accent);
        }
        /* Hero */
        .hero-section {
            min-height: 640px;
            display: flex;
            align-items: center;
            padding: 110px 0 100px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7,10,30,0.88) 0%, rgba(10,14,39,0.75) 45%, rgba(30,35,90,0.55) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }
        .hero-badge {
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.18);
            color: var(--color-accent);
            padding: 8px 22px;
            border-radius: 999px;
            font-size: 0.88rem;
            font-weight: 500;
            display: inline-block;
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: #ffffff;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-title span {
            background: linear-gradient(120deg, var(--color-accent), #ffbf69);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            color: rgba(255,255,255,0.78);
            font-size: 1.15rem;
            line-height: 1.8;
            max-width: 640px;
            margin: 0 auto 32px;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            margin-top: 52px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-stat-item {
            text-align: center;
            padding: 18px 12px;
        }
        .hero-stat-num {
            font-size: 1.7rem;
            font-weight: 800;
            color: #ffffff;
        }
        .hero-stat-label {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }
        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            padding: 36px 30px;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #3a5bef, #5b7ffa, var(--color-accent));
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
            background: linear-gradient(135deg, rgba(58,91,239,0.1), rgba(58,91,239,0.04));
            border: 1px solid rgba(58,91,239,0.15);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }
        /* Categories */
        .category-section {
            background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
            display: block;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(58,91,239,0.3);
        }
        .category-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .category-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card:hover .category-img img {
            transform: scale(1.05);
        }
        .category-img-cover {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7,10,30,0.6), transparent 70%);
        }
        .category-body {
            padding: 24px 26px 28px;
        }
        .category-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(58,91,239,0.08);
            padding: 4px 12px;
            border-radius: 999px;
        }
        .category-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 12px 0 8px;
            color: var(--color-text);
        }
        .category-body p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .category-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-link i {
            transition: transform 0.3s ease;
        }
        .category-card:hover .category-link i {
            transform: translateX(4px);
        }
        /* Latest list */
        .latest-list-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }
        .post-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 26px;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            margin-bottom: 12px;
        }
        .post-cat {
            background: rgba(58,91,239,0.08);
            color: var(--color-primary);
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }
        .post-date {
            color: var(--color-text-soft);
        }
        .post-title {
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card:hover .post-title {
            color: var(--color-primary);
        }
        .post-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .post-link {
            margin-top: auto;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 50px 24px;
            background: #f8faff;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
            color: var(--color-text-soft);
            font-size: 0.95rem;
        }
        /* Data stats */
        .data-section {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            padding: 100px 0;
        }
        .data-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(7,10,30,0.88);
        }
        .data-section .container-x {
            position: relative;
            z-index: 2;
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .data-item {
            text-align: center;
            padding: 32px 18px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        .data-item:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-4px);
        }
        .data-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .data-item .label {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            margin-top: 8px;
        }
        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }
        .process-step {
            text-align: center;
            padding: 0 12px;
        }
        .process-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, #3a5bef, #5b7ffa);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            box-shadow: 0 6px 20px rgba(58,91,239,0.3);
        }
        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--color-text);
        }
        .faq-q i {
            color: var(--color-primary);
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-q i {
            transform: rotate(45deg);
        }
        .faq-a {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.75;
        }
        .faq-item.open .faq-a {
            padding: 0 24px 20px;
            max-height: 320px;
        }
        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0a0e27 0%, #1a2b87 70%, #2b43d6 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245,215,110,0.2), transparent 70%);
            border-radius: 50%;
        }
        /* Footer */
        .site-footer {
            background: #070e36;
            padding: 70px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 50px;
        }
        .footer-brand {
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .footer-brand span {
            color: var(--color-accent);
        }
        .footer-desc {
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            line-height: 1.75;
            max-width: 320px;
        }
        .footer-title {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.55);
            font-size: 0.85rem;
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--color-accent);
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.07);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            color: rgba(255,255,255,0.35);
            font-size: 0.8rem;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .feature-grid,
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .latest-list-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .nav-left .nav-link,
            .nav-right .nav-link {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 64px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .hero-title {
                font-size: 2.1rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .nav-center-logo {
                position: static;
                transform: none;
            }
            .nav-wrapper {
                justify-content: space-between;
            }
            .nav-left .nav-cta-btn {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .feature-grid,
            .category-grid,
            .latest-list-wrap {
                grid-template-columns: 1fr;
            }
            .container-x {
                padding: 0 16px;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #4f6df5;
            --primary-dark: #3451d1;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f7f8fc;
            --bg-alt: #0e1428;
            --text: #1e2433;
            --text-weak: #5b6273;
            --border: #e4e7f0;
            --radius: 18px;
            --radius-lg: 28px;
            --shadow: 0 6px 24px rgba(30, 36, 51, 0.08);
            --shadow-lg: 0 16px 48px rgba(30, 36, 51, 0.14);
            --header-height: 78px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(30, 36, 51, 0.06);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

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

        .nav-center-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 6px 0;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
        }

        .logo-text span {
            background: linear-gradient(135deg, var(--primary), #8b5cf6);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-left: 4px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 14px;
            border-radius: 999px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: all 0.25s ease;
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(79, 109, 245, 0.08);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(79, 109, 245, 0.12);
            font-weight: 600;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), #7c5cf6);
            color: #fff !important;
            font-size: 0.88rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(79, 109, 245, 0.32);
            transition: all 0.3s ease;
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 109, 245, 0.4);
        }

        .mobile-menu-btn {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: #f1f3f9;
            color: var(--text);
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s ease;
        }

        .mobile-menu-btn:hover {
            background: #e3e6f0;
        }

        .mobile-menu-panel {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 20px 24px 24px;
            box-shadow: 0 16px 32px rgba(30, 36, 51, 0.12);
        }

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

        .mobile-menu-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .mobile-menu-links a {
            padding: 12px 14px;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text);
            background: var(--bg);
            transition: background 0.2s ease;
        }

        .mobile-menu-links a.active {
            color: var(--primary);
            background: rgba(79, 109, 245, 0.1);
        }

        .page-hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(14, 20, 40, 0.9), rgba(30, 41, 82, 0.75)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -40px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(79, 109, 245, 0.25), transparent 65%);
            pointer-events: none;
        }

        .page-hero-content {
            position: relative;
            z-index: 1;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 22px;
        }

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

        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .page-hero p {
            font-size: 1.1rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 620px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #7c5cf6);
            color: #fff;
            box-shadow: 0 6px 20px rgba(79, 109, 245, 0.36);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(79, 109, 245, 0.45);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 40px;
        }

        .breadcrumb a {
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: 0.65rem;
        }

        .stats-strip {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 30px 0;
        }

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

        .stat-item {
            text-align: center;
            padding: 16px 12px;
            border-radius: var(--radius);
            transition: background 0.3s ease;
        }

        .stat-item:hover {
            background: var(--bg);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), #8b5cf6);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--text-weak);
            margin-top: 4px;
        }

        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 50px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(79, 109, 245, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(1.7rem, 3.5vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            color: var(--text);
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 1rem;
            margin-top: 14px;
            line-height: 1.7;
        }

        .split-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .split-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .split-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .split-image:hover img {
            transform: scale(1.04);
        }

        .split-content h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 18px;
            line-height: 1.35;
            letter-spacing: -0.02em;
        }

        .split-content p {
            color: var(--text-weak);
            margin-bottom: 16px;
        }

        .split-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 18px;
        }

        .split-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
        }

        .split-list li i {
            color: var(--primary);
            margin-top: 4px;
        }

        .steps-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 30px;
        }

        .step-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            position: relative;
            transition: all 0.3s ease;
        }

        .step-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 109, 245, 0.4);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), #7c5cf6);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
            box-shadow: 0 4px 12px rgba(79, 109, 245, 0.3);
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
        }

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

        .topic-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 109, 245, 0.35);
        }

        .topic-cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

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

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

        .topic-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(14, 20, 40, 0.35), transparent 55%);
        }

        .topic-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 1;
            padding: 6px 12px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.9);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
        }

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

        .topic-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .topic-body p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
        }

        .topic-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 0.88rem;
            font-weight: 600;
            margin-top: 16px;
            transition: gap 0.25s ease;
        }

        .topic-more:hover {
            gap: 10px;
        }

        .tips-section .container-x {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .tips-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: #fff;
            border-radius: 16px;
            padding: 18px 20px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .tips-list li:hover {
            border-color: rgba(79, 109, 245, 0.3);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }

        .tips-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(79, 109, 245, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .tips-list h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .tips-list p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.55;
        }

        .tips-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .tips-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .tips-visual-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px;
            background: linear-gradient(to top, rgba(14, 20, 40, 0.8), transparent);
            color: #fff;
        }

        .tips-visual-caption span {
            display: block;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 4px;
        }

        .tips-visual-caption strong {
            font-size: 1.15rem;
        }

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

        .equip-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .equip-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .equip-cover {
            height: 200px;
            overflow: hidden;
        }

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

        .equip-card:hover .equip-cover img {
            transform: scale(1.05);
        }

        .equip-body {
            padding: 24px;
            flex: 1;
        }

        .equip-body .badge {
            display: inline-block;
            padding: 5px 12px;
            border-radius: 999px;
            background: rgba(79, 109, 245, 0.1);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .equip-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .equip-body p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
        }

        .equip-tag {
            display: flex;
            gap: 8px;
            margin-top: 16px;
            flex-wrap: wrap;
        }

        .equip-tag span {
            padding: 4px 10px;
            border-radius: 8px;
            background: var(--bg);
            font-size: 0.78rem;
            color: var(--text-weak);
        }

        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-item.active {
            border-color: rgba(79, 109, 245, 0.35);
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: #fff;
            cursor: pointer;
            text-align: left;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: var(--bg);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(79, 109, 245, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer p {
            padding: 0 24px 22px;
            color: var(--text-weak);
            font-size: 0.92rem;
            line-height: 1.75;
        }

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

        .cta-banner {
            position: relative;
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(14, 20, 40, 0.92), rgba(52, 81, 209, 0.78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -40px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2), transparent 60%);
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            font-size: 1.05rem;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--bg-alt);
            color: rgba(255, 255, 255, 0.72);
            padding: 70px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 46px;
        }

        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand span {
            background: linear-gradient(135deg, #8b9cff, #c4b5fd);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.25s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.4);
        }

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

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

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

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-wrapper {
                justify-content: space-between;
            }

            .nav-center-logo {
                margin-right: auto;
                margin-left: 16px;
            }

            .mobile-menu-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .page-hero {
                padding: 80px 0 70px;
            }

            .split-card,
            .tips-section .container-x {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .split-image img {
                height: 260px;
            }

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

            .equip-grid {
                grid-template-columns: 1fr;
                max-width: 460px;
                margin: 0 auto;
            }

            .tips-visual img {
                height: 300px;
            }

            .cta-banner {
                padding: 70px 0;
            }

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

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

        @media (max-width: 520px) {
            .container-x {
                padding-left: 20px;
                padding-right: 20px;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 1.6rem;
            }

            .hero-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }

            .page-hero h1 {
                font-size: 1.9rem;
            }

            .logo-text {
                font-size: 1.25rem;
            }
        }

/* roulang page: article */
:root {
        --primary: #172a5e;
        --primary-light: #2a4a8f;
        --primary-soft: #e8edfa;
        --accent: #f0a83a;
        --accent-dark: #d68b1f;
        --accent-soft: #fef3e0;
        --dark-bg: #0d1530;
        --body-bg: #f2f5fb;
        --card-bg: #ffffff;
        --text-main: #1a2440;
        --text-soft: #5b6b8c;
        --text-light: #8b9ac0;
        --border: #dfe6f3;
        --radius-xl: 24px;
        --radius-lg: 16px;
        --radius-md: 12px;
        --radius-sm: 8px;
        --shadow-sm: 0 4px 14px rgba(18, 38, 85, .06);
        --shadow-card: 0 10px 30px rgba(18, 38, 85, .08);
        --shadow-hover: 0 20px 44px rgba(18, 38, 85, .15);
        --transition: all .3s cubic-bezier(.25, .8, .25, 1);
        --container: 1200px;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-main);
        background: var(--body-bg);
        -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    button { cursor: pointer; border: none; background: none; font-family: inherit; }
    ul, ol { list-style: none; }
    .container-x { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

    /* ===== Header ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, .92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(223, 230, 243, .6);
        transition: box-shadow .3s ease, background .3s ease;
    }
    .site-header.scrolled {
        box-shadow: 0 6px 30px rgba(18, 38, 85, .08);
        background: rgba(255, 255, 255, .98);
    }
    .nav-wrapper {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        min-height: 72px;
        gap: 20px;
    }
    .nav-left {
        display: flex;
        align-items: center;
        gap: 4px;
        justify-self: start;
    }
    .nav-right {
        display: flex;
        align-items: center;
        gap: 4px;
        justify-self: end;
    }
    .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 8px 14px;
        border-radius: 10px;
        font-size: 14.5px;
        font-weight: 500;
        color: var(--text-soft);
        position: relative;
        letter-spacing: .2px;
    }
    .nav-link:hover {
        color: var(--primary);
        background: var(--primary-soft);
    }
    .nav-link.active {
        color: var(--primary);
        font-weight: 600;
    }
    .nav-link.active::after {
        content: "";
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 22px;
        height: 3px;
        border-radius: 3px;
        background: var(--accent);
    }
    .nav-center-logo {
        justify-self: center;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .logo-text {
        font-size: 22px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: 1px;
        white-space: nowrap;
    }
    .logo-text span {
        color: var(--accent);
        font-weight: 700;
        margin-left: 2px;
    }
    .nav-cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        font-weight: 600;
        font-size: 14px;
        padding: 9px 18px;
        border-radius: 999px;
        box-shadow: 0 4px 14px rgba(240, 168, 58, .35);
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-cta-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(240, 168, 58, .45);
        color: #fff;
    }
    .mobile-menu-btn {
        display: none;
        width: 44px;
        height: 44px;
        border-radius: 12px;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        color: var(--primary);
        background: var(--primary-soft);
        transition: var(--transition);
        border: 1px solid var(--border);
    }
    .mobile-menu-btn:hover { background: var(--accent-soft); color: var(--accent-dark); }
    .mobile-menu-panel {
        display: none;
        padding: 0 20px;
        max-height: 0;
        overflow: hidden;
        transition: max-height .4s ease, padding .3s ease;
        border-top: 1px solid transparent;
        background: #fff;
    }
    .mobile-menu-panel.open {
        display: block;
        max-height: 340px;
        padding: 14px 20px 20px;
        border-top-color: var(--border);
    }
    .mobile-menu-links {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .mobile-menu-links a {
        padding: 12px 10px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-soft);
        border-radius: 10px;
        transition: var(--transition);
    }
    .mobile-menu-links a:hover {
        background: var(--primary-soft);
        color: var(--primary);
        padding-left: 16px;
    }
    .mobile-menu-links a.active {
        color: var(--primary);
        background: var(--primary-soft);
        font-weight: 600;
        border-left: 3px solid var(--accent);
        padding-left: 16px;
    }

    /* ===== Article Banner ===== */
    .article-banner {
        position: relative;
        padding: 72px 0 60px;
        background: linear-gradient(135deg, rgba(13, 21, 48, .92), rgba(23, 42, 94, .85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        color: #fff;
        overflow: hidden;
    }
    .article-banner::after {
        content: "";
        position: absolute;
        bottom: -60px;
        right: -40px;
        width: 260px;
        height: 260px;
        border-radius: 50%;
        background: rgba(240, 168, 58, .12);
        filter: blur(60px);
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13.5px;
        color: rgba(255, 255, 255, .65);
        margin-bottom: 18px;
        flex-wrap: wrap;
    }
    .breadcrumb a:hover { color: var(--accent); }
    .breadcrumb i { font-size: 11px; opacity: .5; }
    .article-cat-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(240, 168, 58, .18);
        border: 1px solid rgba(240, 168, 58, .4);
        color: #ffd38a;
        font-size: 13px;
        font-weight: 600;
        padding: 5px 14px;
        border-radius: 999px;
        margin-bottom: 16px;
        letter-spacing: .5px;
    }
    .article-banner-title {
        font-size: clamp(26px, 4.2vw, 44px);
        font-weight: 800;
        line-height: 1.3;
        max-width: 800px;
        letter-spacing: .5px;
        text-shadow: 0 2px 20px rgba(0, 0, 0, .3);
    }
    .article-banner-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        margin-top: 24px;
        font-size: 14px;
        color: rgba(255, 255, 255, .7);
        flex-wrap: wrap;
    }
    .article-banner-meta span {
        display: inline-flex;
        align-items: center;
        gap: 7px;
    }
    .article-banner-meta i { color: var(--accent); font-size: 13px; }

    /* ===== Article Layout ===== */
    .article-section { padding: 56px 0 60px; }
    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 340px;
        gap: 40px;
        align-items: start;
    }
    .article-main {
        background: var(--card-bg);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        border: 1px solid var(--border);
    }
    .article-cover {
        width: 100%;
        height: auto;
        max-height: 480px;
        object-fit: cover;
    }
    .article-content-wrap { padding: 36px 40px 30px; }
    .article-content {
        font-size: 17px;
        line-height: 1.95;
        color: var(--text-main);
    }
    .article-content p { margin-bottom: 1.5em; }
    .article-content h2 {
        font-size: 1.55em;
        font-weight: 700;
        margin: 1.8em 0 .8em;
        padding-left: 14px;
        border-left: 4px solid var(--accent);
        line-height: 1.4;
        color: var(--primary);
    }
    .article-content h3 {
        font-size: 1.25em;
        font-weight: 700;
        margin: 1.5em 0 .7em;
        color: var(--primary);
    }
    .article-content ul {
        margin: 0 0 1.5em 1.4em;
        list-style: disc;
    }
    .article-content ol {
        margin: 0 0 1.5em 1.4em;
        list-style: decimal;
    }
    .article-content li { margin-bottom: .5em; }
    .article-content img {
        border-radius: var(--radius-md);
        margin: 1.8em 0;
        box-shadow: var(--shadow-sm);
    }
    .article-content blockquote {
        border-left: 4px solid var(--accent);
        background: var(--accent-soft);
        padding: 1em 1.4em;
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        margin: 1.5em 0;
        color: var(--text-soft);
        font-style: italic;
    }
    .article-content a {
        color: var(--primary-light);
        text-decoration: underline;
        text-underline-offset: 3px;
    }
    .article-content a:hover { color: var(--accent-dark); }
    .article-content table {
        width: 100%;
        border-collapse: collapse;
        margin: 1.5em 0;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }
    .article-content th {
        background: var(--primary);
        color: #fff;
        padding: 12px 16px;
        text-align: left;
        font-weight: 600;
        font-size: 14px;
    }
    .article-content td {
        border-bottom: 1px solid var(--border);
        padding: 12px 16px;
        font-size: 15px;
    }
    .article-content code {
        background: var(--primary-soft);
        padding: 2px 8px;
        border-radius: 6px;
        font-size: .9em;
        color: var(--primary-light);
        font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    }
    .article-content pre {
        background: var(--dark-bg);
        color: #dbe4f5;
        padding: 20px;
        border-radius: var(--radius-md);
        overflow-x: auto;
        margin: 1.5em 0;
        font-size: 14px;
        line-height: 1.7;
    }
    .article-content pre code { background: transparent; color: inherit; padding: 0; }

    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        padding: 22px 40px;
        border-top: 1px solid var(--border);
        background: #fafbfe;
        align-items: center;
    }
    .tag-label {
        font-size: 13px;
        color: var(--text-light);
        font-weight: 600;
        margin-right: 4px;
    }
    .tag-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--primary-soft);
        color: var(--primary-light);
        font-size: 13px;
        font-weight: 500;
        padding: 5px 14px;
        border-radius: 999px;
        border: 1px solid transparent;
        transition: var(--transition);
    }
    .tag-item:hover {
        background: var(--accent-soft);
        color: var(--accent-dark);
        border-color: var(--accent);
    }
    .article-share {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 18px 40px 24px;
        background: #fafbfe;
        border-top: 1px solid var(--border);
    }
    .share-title {
        font-size: 14px;
        color: var(--text-soft);
        font-weight: 600;
        margin-right: 6px;
    }
    .share-btn {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 15px;
        color: var(--text-soft);
        background: #fff;
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .share-btn:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(23, 42, 94, .2);
    }

    /* ===== Sidebar ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 24px;
        position: sticky;
        top: 96px;
    }
    .sidebar-card {
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        padding: 26px 22px;
        border: 1px solid var(--border);
    }
    .sidebar-card-title {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 17px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 18px;
        padding-bottom: 14px;
        border-bottom: 2px solid var(--accent);
    }
    .sidebar-card-title i { color: var(--accent); font-size: 16px; }
    .side-post-item {
        display: flex;
        gap: 12px;
        padding: 12px 0;
        border-bottom: 1px solid #eef1f8;
        transition: var(--transition);
        align-items: flex-start;
    }
    .side-post-item:last-child { border-bottom: none; }
    .side-post-item:hover { padding-left: 6px; }
    .side-post-num {
        flex-shrink: 0;
        width: 32px;
        height: 32px;
        border-radius: 9px;
        background: var(--primary-soft);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        font-weight: 700;
        color: var(--primary-light);
        transition: var(--transition);
    }
    .side-post-item:hover .side-post-num {
        background: var(--accent);
        color: #fff;
    }
    .side-post-info h4 {
        font-size: 14.5px;
        font-weight: 600;
        line-height: 1.4;
        color: var(--text-main);
        margin-bottom: 4px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .side-post-info h4:hover { color: var(--primary-light); }
    .side-post-info span {
        font-size: 12.5px;
        color: var(--text-light);
    }

    .sidebar-cat-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 13px 14px;
        border-radius: 12px;
        background: #f7f9fd;
        border: 1px solid transparent;
        margin-bottom: 10px;
        transition: var(--transition);
    }
    .sidebar-cat-item:hover {
        background: var(--primary-soft);
        border-color: var(--primary-light);
        transform: translateX(4px);
    }
    .sidebar-cat-icon {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        background: var(--primary);
        color: #fff;
        flex-shrink: 0;
    }
    .sidebar-cat-item:nth-child(2) .sidebar-cat-icon { background: var(--accent); }
    .sidebar-cat-item:nth-child(3) .sidebar-cat-icon { background: #5b8def; }
    .sidebar-cat-item:nth-child(4) .sidebar-cat-icon { background: #7c5cd6; }
    .sidebar-cat-info h5 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-main);
    }
    .sidebar-cat-info p {
        font-size: 12.5px;
        color: var(--text-light);
        margin-top: 2px;
    }

    .sidebar-cta-card {
        border-radius: var(--radius-lg);
        padding: 30px 24px;
        background: linear-gradient(150deg, rgba(13, 21, 48, .95), rgba(23, 42, 94, .9)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        color: #fff;
        text-align: center;
        border: none;
        box-shadow: 0 16px 40px rgba(13, 21, 48, .35);
        position: relative;
        overflow: hidden;
    }
    .sidebar-cta-card::before {
        content: "";
        position: absolute;
        top: -50px;
        right: -50px;
        width: 130px;
        height: 130px;
        border-radius: 50%;
        background: rgba(240, 168, 58, .2);
        filter: blur(40px);
    }
    .sidebar-cta-card i {
        font-size: 34px;
        color: var(--accent);
        margin-bottom: 12px;
    }
    .sidebar-cta-card h4 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .sidebar-cta-card p {
        font-size: 13.5px;
        color: rgba(255, 255, 255, .75);
        margin-bottom: 18px;
        line-height: 1.6;
    }
    .sidebar-cta-btn {
        display: inline-block;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        padding: 10px 24px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        transition: var(--transition);
        box-shadow: 0 6px 18px rgba(240, 168, 58, .4);
    }
    .sidebar-cta-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(240, 168, 58, .5);
        color: #fff;
    }

    /* ===== Not Found ===== */
    .not-found-box {
        text-align: center;
        padding: 80px 40px;
    }
    .not-found-box i {
        font-size: 56px;
        color: var(--accent);
        margin-bottom: 20px;
        display: inline-block;
    }
    .not-found-box h2 {
        font-size: 30px;
        color: var(--primary);
        margin-bottom: 12px;
        font-weight: 800;
    }
    .not-found-box p {
        color: var(--text-soft);
        margin-bottom: 28px;
        font-size: 16px;
    }
    .not-found-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        color: #fff;
        padding: 12px 28px;
        border-radius: 999px;
        font-weight: 600;
        transition: var(--transition);
        box-shadow: 0 8px 24px rgba(23, 42, 94, .25);
    }
    .not-found-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(23, 42, 94, .35);
        color: #fff;
    }

    /* ===== Related Section ===== */
    .related-section {
        padding: 64px 0 72px;
        background: linear-gradient(180deg, #fff 0%, var(--body-bg) 100%);
    }
    .section-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 36px;
        flex-wrap: wrap;
        gap: 12px;
    }
    .section-title-wrap h2 {
        font-size: 28px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: .3px;
    }
    .section-title-wrap h2 i {
        color: var(--accent);
        margin-right: 8px;
    }
    .section-title-wrap p {
        color: var(--text-soft);
        font-size: 14.5px;
        margin-top: 4px;
    }
    .section-more {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--primary-light);
        background: #fff;
        border: 1px solid var(--border);
        padding: 8px 18px;
        border-radius: 999px;
        transition: var(--transition);
    }
    .section-more:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }

    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .post-card {
        background: #fff;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .post-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(42, 74, 143, .25);
    }
    .post-card-cover {
        position: relative;
        height: 180px;
        overflow: hidden;
    }
    .post-card-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s ease;
    }
    .post-card:hover .post-card-cover img { transform: scale(1.06); }
    .post-cat-pill {
        position: absolute;
        top: 14px;
        left: 14px;
        background: rgba(13, 21, 48, .8);
        color: #ffd38a;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
        backdrop-filter: blur(6px);
        letter-spacing: .5px;
    }
    .post-card-body {
        padding: 20px 20px 18px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .post-card-title {
        font-size: 16.5px;
        font-weight: 700;
        color: var(--text-main);
        line-height: 1.45;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: var(--transition);
    }
    .post-card:hover .post-card-title { color: var(--primary-light); }
    .post-card-excerpt {
        font-size: 13.5px;
        color: var(--text-soft);
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 14px;
        flex: 1;
    }
    .post-card-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 12.5px;
        color: var(--text-light);
        padding-top: 12px;
        border-top: 1px solid #eef1f8;
    }
    .post-card-meta span {
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    .empty-tip {
        text-align: center;
        color: var(--text-soft);
        padding: 40px;
        font-size: 15px;
        background: #fff;
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border);
    }

    /* ===== CTA Section ===== */
    .cta-section {
        position: relative;
        padding: 76px 0;
        background: linear-gradient(135deg, rgba(13, 21, 48, .95), rgba(23, 42, 94, .88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        color: #fff;
        text-align: center;
        overflow: hidden;
    }
    .cta-section::before {
        content: "";
        position: absolute;
        top: -80px;
        left: 50%;
        transform: translateX(-50%);
        width: 500px;
        height: 300px;
        background: radial-gradient(circle, rgba(240, 168, 58, .15) 0%, transparent 70%);
        pointer-events: none;
    }
    .cta-inner { position: relative; z-index: 2; max-width: 700px; margin: 0 auto; }
    .cta-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto 22px;
        border-radius: 20px;
        background: rgba(240, 168, 58, .15);
        border: 1px solid rgba(240, 168, 58, .3);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 26px;
        color: var(--accent);
    }
    .cta-title {
        font-size: clamp(24px, 3.6vw, 36px);
        font-weight: 800;
        line-height: 1.4;
        margin-bottom: 14px;
        letter-spacing: .5px;
    }
    .cta-text {
        font-size: 15.5px;
        color: rgba(255, 255, 255, .78);
        margin-bottom: 30px;
        line-height: 1.8;
    }
    .cta-buttons {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .cta-btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        padding: 13px 30px;
        border-radius: 999px;
        font-weight: 600;
        font-size: 15px;
        box-shadow: 0 8px 24px rgba(240, 168, 58, .35);
        transition: var(--transition);
    }
    .cta-btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 14px 36px rgba(240, 168, 58, .45);
        color: #fff;
    }
    .cta-btn-ghost {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        border: 1.5px solid rgba(255, 255, 255, .35);
        color: #fff;
        padding: 12px 28px;
        border-radius: 999px;
        font-weight: 500;
        font-size: 15px;
        background: rgba(255, 255, 255, .04);
        backdrop-filter: blur(8px);
        transition: var(--transition);
    }
    .cta-btn-ghost:hover {
        border-color: var(--accent);
        background: rgba(240, 168, 58, .12);
        color: var(--accent);
    }

    /* ===== FAQ ===== */
    .faq-section {
        padding: 72px 0 80px;
        background: var(--body-bg);
    }
    .faq-layout {
        display: grid;
        grid-template-columns: 340px 1fr;
        gap: 48px;
        align-items: start;
    }
    .faq-left-sticky { position: sticky; top: 100px; }
    .faq-left-title {
        font-size: 30px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.4;
        margin-bottom: 14px;
    }
    .faq-left-title span { color: var(--accent); }
    .faq-left-desc {
        color: var(--text-soft);
        font-size: 15px;
        line-height: 1.8;
        margin-bottom: 22px;
    }
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 22px 24px;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
    }
    .faq-item:hover {
        border-color: rgba(42, 74, 143, .25);
        box-shadow: var(--shadow-card);
    }
    .faq-q {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
    }
    .faq-q i {
        flex-shrink: 0;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--primary-soft);
        color: var(--primary-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        transition: var(--transition);
    }
    .faq-item:hover .faq-q i {
        background: var(--accent);
        color: #fff;
    }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height .4s ease;
    }
    .faq-a p {
        padding-top: 14px;
        border-top: 1px solid #eef1f8;
        margin-top: 14px;
        font-size: 14.5px;
        color: var(--text-soft);
        line-height: 1.8;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--dark-bg);
        color: rgba(255, 255, 255, .8);
        padding: 64px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 44px;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
    }
    .footer-brand {
        font-size: 22px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 12px;
        letter-spacing: .5px;
    }
    .footer-brand span { color: var(--accent); }
    .footer-desc {
        font-size: 14px;
        line-height: 1.9;
        color: rgba(255, 255, 255, .6);
        max-width: 300px;
    }
    .footer-title {
        font-size: 15.5px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 18px;
        letter-spacing: .5px;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a {
        font-size: 14px;
        color: rgba(255, 255, 255, .6);
        transition: var(--transition);
    }
    .footer-links a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 24px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, .4);
        flex-wrap: wrap;
        gap: 10px;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .nav-left { display: none; }
        .nav-right { display: none; }
        .mobile-menu-btn { display: flex; }
        .nav-wrapper {
            grid-template-columns: 1fr auto 1fr;
        }
        .article-layout {
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 24px;
        }
        .faq-layout {
            grid-template-columns: 260px 1fr;
            gap: 32px;
        }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
        .container-x { padding: 0 18px; }
        .article-banner { padding: 48px 0 42px; }
        .article-banner-title { font-size: 26px; }
        .article-banner-meta { gap: 12px; font-size: 13px; }
        .article-section { padding: 40px 0 48px; }
        .article-layout { grid-template-columns: 1fr; }
        .article-sidebar {
            position: static;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .sidebar-cta-card { grid-column: span 2; }
        .article-content-wrap { padding: 28px 22px 22px; }
        .article-tags { padding: 18px 22px; }
        .article-share { padding: 16px 22px 20px; }
        .faq-layout { grid-template-columns: 1fr; }
        .faq-left-sticky { position: static; }
        .cta-section { padding: 60px 0; }
        .cta-title { font-size: 24px; }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
        .article-sidebar { grid-template-columns: 1fr; }
        .sidebar-cta-card { grid-column: span 1; }
        .related-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; }
        .cta-buttons { flex-direction: column; align-items: center; }
        .cta-btn-primary, .cta-btn-ghost { width: 100%; justify-content: center; }
        .section-header { flex-direction: column; align-items: flex-start; }
        .article-banner-title { font-size: 22px; }
        .breadcrumb { font-size: 12.5px; }
        .article-banner-meta span { font-size: 12px; }
    }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #6366f1;
            --accent: #f59e0b;
            --bg-night: #0b1026;
            --bg-card: #ffffff;
            --text-main: #1e293b;
            --text-body: #475569;
            --text-weak: #94a3b8;
            --border-light: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background: #f8fafc;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            margin: 0;
        }

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

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

        button {
            border: none;
            background: none;
            cursor: pointer;
        }

        .container-x {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ---------- 导航 ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 1px 12px rgba(15, 23, 42, 0.04);
            transition: box-shadow 0.3s ease;
        }

        .site-header.is-scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 20px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            min-width: 0;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-link {
            padding: 8px 14px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            color: #475569;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #eef2ff;
        }

        .nav-link.active {
            color: var(--primary);
            background: #eef2ff;
            font-weight: 600;
        }

        .nav-center-logo {
            display: flex;
            align-items: center;
            flex-shrink: 0;
            text-decoration: none;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #1e1b4b;
            letter-spacing: 0.5px;
            line-height: 1.2;
            text-align: center;
        }

        .logo-text span {
            display: block;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-top: 2px;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            padding: 9px 18px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.28);
            transition: var(--transition);
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(79, 70, 229, 0.36);
            color: #fff;
        }

        .nav-cta-btn i {
            font-size: 12px;
        }

        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: #1e293b;
            font-size: 18px;
            transition: var(--transition);
        }

        .mobile-menu-btn:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .mobile-menu-panel {
            display: none;
            border-top: 1px solid var(--border-light);
            background: #fff;
            padding: 12px 24px 20px;
        }

        .mobile-menu-panel.active {
            display: block;
        }

        .mobile-menu-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu-links a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
        }

        .mobile-menu-links a:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .mobile-menu-links a.active {
            background: #eef2ff;
            color: var(--primary);
            font-weight: 600;
        }

        /* ---------- 通用板块 ---------- */
        .section {
            padding: 84px 0;
        }

        .section.tint {
            background: #f8fafc;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary);
            background: #eef2ff;
            padding: 6px 16px;
            border-radius: 9999px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.25;
            color: #0f172a;
            margin: 0 0 14px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
        }

        /* ---------- Hero ---------- */
        .cat-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 120px 0 110px;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 16, 38, 0.88), rgba(30, 27, 75, 0.72), rgba(79, 70, 229, 0.55));
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 20px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: #fbbf24;
        }

        .hero-title {
            font-size: clamp(32px, 6vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1px;
            margin: 0 0 20px;
        }

        .hero-desc {
            font-size: clamp(15px, 2vw, 18px);
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto 34px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            color: #422006;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 30px;
            border-radius: 9999px;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.45);
            color: #422006;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 13px 30px;
            border-radius: 9999px;
            transition: var(--transition);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ---------- 特色卡片 ---------- */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), #7c3aed);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

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

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: #0f172a;
            margin: 0 0 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
        }

        /* ---------- 资讯卡片 ---------- */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: transparent;
        }

        .news-card-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
            background: #f1f5f9;
        }

        .news-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .news-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            background: rgba(79, 70, 229, 0.9);
            backdrop-filter: blur(6px);
            padding: 5px 14px;
            border-radius: 9999px;
            letter-spacing: 0.5px;
        }

        .news-tag.blue {
            background: rgba(2, 132, 199, 0.9);
        }

        .news-tag.cyan {
            background: rgba(8, 145, 178, 0.9);
        }

        .news-tag.green {
            background: rgba(5, 150, 105, 0.9);
        }

        .news-tag.orange {
            background: rgba(217, 119, 6, 0.9);
        }

        .news-tag.pink {
            background: rgba(219, 39, 119, 0.9);
        }

        .news-card-body {
            padding: 24px 22px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            color: #0f172a;
            margin: 0 0 10px;
        }

        .news-card-body h3 a {
            transition: color 0.2s;
        }

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

        .news-card-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0 0 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid #f1f5f9;
            padding-top: 14px;
        }

        .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* ---------- 热门话题 ---------- */
        .topic-wrap {
            background: linear-gradient(135deg, #0b1026, #1e1b4b);
            border-radius: 24px;
            padding: 72px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .topic-wrap::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.25), transparent 70%);
            top: -80px;
            right: -40px;
            border-radius: 50%;
        }

        .topic-wrap .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: #c7d2fe;
        }

        .topic-wrap .section-title {
            color: #fff;
        }

        .topic-wrap .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-top: 36px;
        }

        .topic-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.9);
            padding: 10px 22px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .topic-chip i {
            color: #fbbf24;
            font-size: 12px;
        }

        .topic-chip:hover {
            background: rgba(79, 70, 229, 0.3);
            border-color: rgba(99, 102, 241, 0.5);
            transform: translateY(-2px);
        }

        /* ---------- 排行 + 专题 ---------- */
        .rank-topic-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

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

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 8px;
            border-bottom: 1px solid #f1f5f9;
            transition: var(--transition);
            border-radius: var(--radius-sm);
        }

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

        .rank-item:hover {
            background: #f8fafc;
            padding-left: 16px;
            padding-right: 16px;
        }

        .rank-num {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 800;
            flex-shrink: 0;
            background: #f1f5f9;
            color: #64748b;
        }

        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            color: #fff;
        }

        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, #94a3b8, #cbd5e1);
            color: #fff;
        }

        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, #b45309, #d97706);
            color: #fff;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info h4 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 4px;
            color: #1e293b;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .rank-info h4 a:hover {
            color: var(--primary);
        }

        .rank-info .rank-reads {
            font-size: 13px;
            color: var(--text-weak);
        }

        .rank-badge {
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 9999px;
            background: #eef2ff;
            color: var(--primary);
            white-space: nowrap;
        }

        .topic-feature {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 20px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .topic-feature-media {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .topic-feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .topic-feature:hover .topic-feature-media img {
            transform: scale(1.04);
        }

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

        .topic-feature-body .feat-label {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 10px;
            display: block;
        }

        .topic-feature-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 12px;
            color: #0f172a;
            line-height: 1.4;
        }

        .topic-feature-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0 0 20px;
        }

        /* ---------- 订阅 CTA ---------- */
        .cta-newsletter {
            background: linear-gradient(135deg, #312e81, #4f46e5);
            border-radius: 24px;
            padding: 72px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-newsletter::before {
            content: '\f005';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            font-size: 200px;
            color: rgba(255, 255, 255, 0.04);
            top: -20px;
            right: 40px;
            transform: rotate(15deg);
        }

        .cta-newsletter h2 {
            font-size: clamp(26px, 3.5vw, 34px);
            font-weight: 800;
            margin: 0 0 16px;
            position: relative;
            z-index: 1;
        }

        .cta-newsletter p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .newsletter-form {
            display: flex;
            gap: 10px;
            max-width: 480px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .newsletter-form input {
            flex: 1;
            padding: 14px 20px;
            border-radius: 9999px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 15px;
            outline: none;
            transition: var(--transition);
        }

        .newsletter-form input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }

        .newsletter-form input:focus {
            background: rgba(255, 255, 255, 0.18);
            border-color: rgba(255, 255, 255, 0.6);
            box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.12);
        }

        .newsletter-form .btn-subscribe {
            background: #fbbf24;
            color: #422006;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 9999px;
            font-size: 15px;
            white-space: nowrap;
            transition: var(--transition);
        }

        .newsletter-form .btn-subscribe:hover {
            background: #f59e0b;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
        }

        .cta-note {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 14px;
            position: relative;
            z-index: 1;
        }

        /* ---------- FAQ ---------- */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #0f172a;
            text-align: left;
            transition: var(--transition);
        }

        .faq-question i {
            color: var(--primary);
            font-size: 14px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

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

        .faq-answer p {
            padding: 0 24px 22px;
            margin: 0;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: #0b1026;
            color: rgba(255, 255, 255, 0.65);
            padding: 72px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand span {
            color: #818cf8;
            font-size: 13px;
            font-weight: 600;
            margin-left: 4px;
            letter-spacing: 1px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            max-width: 280px;
            margin: 0;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #a5b4fc;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1024px) {
            .container-x {
                padding-left: 20px;
                padding-right: 20px;
            }

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

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

            .rank-topic-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .mobile-menu-btn {
                display: inline-flex;
            }

            .nav-wrapper {
                height: 64px;
            }

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

            .logo-text span {
                font-size: 11px;
            }

            .section {
                padding: 60px 0;
            }

            .cat-hero {
                padding: 90px 0 80px;
                background-attachment: scroll;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn-primary,
            .btn-outline-light {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }

            .topic-wrap {
                padding: 48px 24px;
                border-radius: 16px;
            }

            .cta-newsletter {
                padding: 48px 24px;
                border-radius: 16px;
            }

            .newsletter-form {
                flex-direction: column;
            }

            .newsletter-form .btn-subscribe {
                width: 100%;
                justify-content: center;
            }

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

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .cat-hero {
                padding: 72px 0 64px;
            }

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

            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }

            .faq-answer p {
                font-size: 14px;
                padding: 0 18px 18px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --surface: #ffffff;
  --border: #e2e8f0;
  --radius: 1rem;
  --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 30px rgba(79, 70, 229, 0.14);
  --space-section: 5rem;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

.container-x {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (max-width: 640px) {
  .container-x {
    padding: 0 1rem;
  }
}

/* 导航 */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  position: sticky;
  top: 0;
  z-index: 60;
  box-shadow: 0 1px 8px rgba(15, 23, 42, 0.04);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
}

.nav-right {
  justify-content: flex-end;
}

.nav-center-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.logo-text {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-text span {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: #475569;
  padding: 0.5rem 0.25rem;
  position: relative;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.25s ease;
}

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

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

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

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff !important;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
  transition: all 0.25s ease;
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
}

.mobile-menu-btn {
  display: none;
  font-size: 1.3rem;
  color: var(--text);
  padding: 0.5rem;
}

.mobile-menu-panel {
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
}

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

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mobile-menu-links a {
  font-size: 1rem;
  font-weight: 500;
  color: #334155;
  padding: 0.5rem 0;
}

.mobile-menu-links a.active {
  color: var(--primary-dark);
  font-weight: 700;
}

@media (max-width: 960px) {
  .nav-left,
  .nav-right {
    gap: 1rem;
  }
  .nav-center-logo {
    position: static;
    transform: none;
  }
  .nav-wrapper {
    justify-content: space-between;
  }
  .nav-left {
    display: none;
  }
  .nav-right {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
}

/* Hero banner */
.category-hero {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  isolation: isolate;
}

.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(2, 6, 23, 0.9) 0%, rgba(15, 23, 42, 0.72) 50%, rgba(30, 27, 75, 0.55) 100%);
  z-index: -1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #e0e7ff;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  backdrop-filter: blur(6px);
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.15;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.06rem;
  margin-top: 1.2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #0f172a !important;
  font-weight: 700;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
  transition: all 0.25s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(245, 158, 11, 0.45);
}

.btn-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  color: #fff !important;
  font-weight: 600;
  padding: 0.78rem 1.6rem;
  border-radius: 999px;
  backdrop-filter: blur(4px);
  transition: all 0.25s ease;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

/* 板块通用 */
.section-padding {
  padding: var(--space-section) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary-dark);
  background: #eef2ff;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 0.8rem;
  letter-spacing: 0.03em;
}

.section-title {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 660px;
  margin-top: 0.6rem;
}

/* 工具卡片 */
.tool-card {
  background: #fff;
  border-radius: 1.25rem;
  padding: 1.75rem;
  border: 1px solid #eef0f4;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: #e0e7ff;
}

.tool-card .tool-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef2ff, #e0e7ff);
  color: var(--primary-dark);
  border-radius: 14px;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
}

.tool-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.tool-card p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tool-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: #4f46e5;
  background: #eef2ff;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
}

/* 排行 */
.rank-section {
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  position: relative;
  isolation: isolate;
}

.rank-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.92);
  z-index: -1;
}

.rank-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  padding: 1.1rem 1.25rem;
  transition: all 0.3s ease;
}

.rank-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.rank-num {
  font-size: 1.3rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.25);
  min-width: 2.4rem;
}

.rank-name {
  color: #e2e8f0;
  font-weight: 600;
  font-size: 0.95rem;
}

.rank-meta {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
}

.rank-bar-bg {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 0.6rem;
}

.rank-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  border-radius: 99px;
  width: 0;
  transition: width 0.6s ease;
}

/* 流程 */
.step-line {
  position: relative;
}

.step-line::before {
  content: '';
  position: absolute;
  top: 38px;
  left: 24px;
  right: 24px;
  height: 2px;
  background: #e0e7ff;
  border-radius: 2px;
}

.step-item {
  position: relative;
  z-index: 2;
}

.step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.28);
  margin-bottom: 1rem;
}

/* FAQ */
.faq-item {
  background: #fff;
  border-radius: 1rem;
  border: 1px solid #eef0f4;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.faq-item:hover {
  border-color: #c7d2fe;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.4rem;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  width: 100%;
  text-align: left;
  background: none;
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: #faf9ff;
}

.faq-question .fa-chevron-down {
  transition: transform 0.3s ease;
  color: var(--muted);
  flex-shrink: 0;
}

.faq-item.open .faq-question .fa-chevron-down {
  transform: rotate(180deg);
  color: var(--primary);
}

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

.faq-answer-content {
  padding: 0 1.4rem 1.4rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* CTA */
.cta-section {
  background: linear-gradient(135deg, #1e1b4b, #312e81);
  border-radius: 1.5rem;
  overflow: hidden;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  opacity: 0.2;
}

/* 页脚 */
.site-footer {
  background: #0b1120;
  color: #94a3b8;
  padding: 3.5rem 0 1.8rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: #f1f5f9;
  margin-bottom: 0.8rem;
}

.footer-brand span {
  color: #fbbf24;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 320px;
}

.footer-title {
  color: #e2e8f0;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #fbbf24;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  padding-top: 1.8rem;
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  font-size: 0.8rem;
}

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

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.6rem;
  }
  .section-padding {
    --space-section: 3rem;
  }
  .step-line::before {
    display: none;
  }
}

/* 无障碍 focus */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(99, 102, 241, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 卡片图 */
.cover-img {
  border-radius: 1rem;
  object-fit: cover;
  width: 100%;
  height: 200px;
  transition: transform 0.4s ease;
}

.cover-wrap {
  overflow: hidden;
  border-radius: 1rem;
  position: relative;
}

.cover-wrap:hover .cover-img {
  transform: scale(1.04);
}