/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --dark: #0F172A;
            --accent: #F59E0B;
            --accent-bg: #FEF3C7;
            --page-bg: #F8FAFC;
            --text-main: #1E293B;
            --text-sub: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --missing: #CBD5E1;
            --radius-xl: 16px;
            --radius-lg: 12px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 8px 30px rgba(15, 23, 42, 0.09);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--page-bg);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* 悬浮胶囊导航 */
        .nav-capsule {
            position: fixed;
            top: 1rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 50;
            width: calc(100% - 2rem);
            max-width: 64rem;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: 999px;
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.5rem 0.75rem 0.5rem 1.25rem;
        }
        @media (max-width: 767px) {
            .nav-capsule {
                padding: 0.5rem 0.75rem;
            }
        }

        .nav-link {
            padding: 0.5rem 1.1rem;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-sub);
            transition: all 0.2s ease;
        }
        .nav-link:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-bg);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            padding: 0.8rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
            transition: all 0.2s ease;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: #1D4ED8;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .btn-accent:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.5), 0 0 0 6px rgba(37, 99, 235, 0.15);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.8rem 1.9rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            cursor: pointer;
        }
        .btn-secondary:hover {
            border-color: #93C5FD;
            background: var(--primary-bg);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--accent);
            color: #0F172A;
            border-radius: 999px;
            padding: 0.9rem 2.2rem;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            transition: all 0.2s ease;
            border: none;
            cursor: pointer;
        }
        .btn-accent:hover {
            background: #FBBF24;
            transform: scale(1.03);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.4);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: 999px;
            padding: 0.8rem 1.9rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            cursor: pointer;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }

        .btn-sm {
            padding: 0.45rem 1.25rem;
            font-size: 0.85rem;
        }

        .eyebrow {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.14em;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-bg);
            padding: 0.25rem 0.85rem;
            border-radius: 999px;
            text-transform: uppercase;
            margin-bottom: 1rem;
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text-main);
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.4rem;
            }
        }

        /* 卡片通用 */
        .card-base {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
        }
        .card-base:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        /* 星星装饰 */
        .stars-decor {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background-image:
                radial-gradient(2px 2px at 15% 25%, rgba(245, 158, 11, 0.45), transparent),
                radial-gradient(3px 3px at 72% 18%, rgba(37, 99, 235, 0.35), transparent),
                radial-gradient(2px 2px at 82% 62%, rgba(245, 158, 11, 0.35), transparent),
                radial-gradient(2px 2px at 38% 72%, rgba(37, 99, 235, 0.25), transparent),
                radial-gradient(1.5px 1.5px at 55% 45%, rgba(15, 23, 42, 0.15), transparent);
        }

        .stars-decor~* {
            position: relative;
            z-index: 1;
        }

        /* FAQ 手风琴 */
        .faq-item {
            background: #fff;
            border-radius: 14px;
            box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
            border: 1px solid rgba(226, 232, 240, 0.7);
            margin-bottom: 0.85rem;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }
        .faq-item.active {
            box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.15), 0 6px 24px rgba(37, 99, 235, 0.06);
        }
        .faq-item button {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.4rem;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: background 0.2s ease;
        }
        .faq-item button:hover {
            background: #F8FAFC;
        }
        .faq-item button:focus-visible {
            outline: none;
            box-shadow: inset 0 0 0 2px var(--primary);
            border-radius: 14px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 300;
            color: var(--primary);
            transition: transform 0.3s ease;
            line-height: 1;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.4rem;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
            padding-bottom: 1.2rem;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-sub);
            line-height: 1.75;
        }

        /* 线截断 */
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .line-clamp-1 {
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 移动菜单 */
        .mobile-menu {
            position: fixed;
            top: 72px;
            left: 1rem;
            right: 1rem;
            z-index: 49;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
            padding: 1.2rem;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: all 0.25s ease;
        }
        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .mobile-menu a {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-main);
            transition: background 0.2s ease;
        }
        .mobile-menu a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-menu .btn-primary {
            margin-top: 0.75rem;
            width: 100%;
            justify-content: center;
        }

        /* 会员权益对比表 */
        .pricing-card {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 1.6rem;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(226, 232, 240, 0.5);
        }
        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .pricing-card.recommended {
            border: 2px solid var(--primary);
            box-shadow: 0 8px 32px rgba(37, 99, 235, 0.15);
        }
        .recommend-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #0F172A;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 1rem;
            border-radius: 999px;
            letter-spacing: 0.04em;
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
            white-space: nowrap;
        }
        .benefit-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.65rem 0;
            border-bottom: 1px solid rgba(241, 245, 249, 0.8);
            font-size: 0.88rem;
        }
        .benefit-row:last-child {
            border-bottom: none;
        }
        .benefit-check {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            flex-shrink: 0;
        }
        .benefit-check.yes {
            background: rgba(16, 185, 129, 0.12);
            color: var(--success);
        }
        .benefit-check.no {
            background: rgba(203, 213, 225, 0.25);
            color: var(--missing);
        }

        /* 内容预览锁遮罩 */
        .preview-card .lock-overlay {
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 2;
            border-radius: 0;
        }
        .preview-card:hover .lock-overlay {
            opacity: 1;
        }
        .preview-card .lock-overlay span {
            font-size: 1.6rem;
        }
        .preview-card .lock-overlay p {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-sub);
            background: rgba(255, 255, 255, 0.85);
            padding: 0.2rem 0.8rem;
            border-radius: 999px;
        }

        .member-badge {
            position: absolute;
            top: 0.75rem;
            right: 0.75rem;
            z-index: 3;
            background: var(--accent-bg);
            color: #B45309;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
        }

        /* 分类标签 */
        .tag-badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.2rem 0.75rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }

        /* 输入框 */
        .input-sim {
            background: #F8FAFC;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 0.7rem 1rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 46px;
        }

        /* 页脚 */
        .footer-link {
            display: inline-block;
            padding: 0.3rem 0;
            font-size: 0.88rem;
            color: #94A3B8;
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: #fff;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #CBD5E1;
            font-size: 1rem;
            transition: all 0.2s ease;
        }
        .social-icon:hover {
            background: rgba(255, 255, 255, 0.16);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Hero 区域 */
        .hero-visual-card {
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 12px 48px rgba(15, 23, 42, 0.1);
            padding: 1.8rem;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        /* 等级亮点 */
        .highlight-card {
            background: #fff;
            border-radius: 18px;
            padding: 1.6rem 1.4rem;
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
            border: 1px solid rgba(226, 232, 240, 0.35);
        }
        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .highlight-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        /* CTA 区块 */
        .cta-section {
            position: relative;
            overflow: hidden;
            background: #0F172A;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
        }
        .cta-section .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.9));
        }

        /* 资讯卡片 */
        .article-card {
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
            display: block;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        /* 焦点可见 */
        a:focus-visible,
        button:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.5), 0 0 0 6px rgba(37, 99, 235, 0.15);
            border-radius: 12px;
        }

/* roulang page: category1 */
:root {
            --color-primary: #2563EB;
            --color-primary-light: #3B82F6;
            --color-primary-soft: #EFF6FF;
            --color-dark: #0F172A;
            --color-accent: #F59E0B;
            --color-accent-soft: #FEF3C7;
            --color-bg: #F8FAFC;
            --color-text: #1E293B;
            --color-text-sub: #475569;
            --color-text-mute: #94A3B8;
            --color-border: #E2E8F0;
            --radius-lg: 1rem;
            --radius-full: 9999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.06);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button {
            font-family: inherit;
        }

        .container {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 悬浮胶囊导航 ===== */
        .nav-capsule {
            position: fixed;
            top: 1rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 50;
            width: calc(100% - 2rem);
            max-width: 64rem;
            background-color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.5rem 0.75rem 0.5rem 1.25rem;
            gap: 1rem;
        }

        .nav-link {
            display: inline-block;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-text);
            transition: all 0.2s ease;
        }

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

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.875rem;
            padding: 0.625rem 1.5rem;
            transition: all 0.2s ease;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background-color: var(--color-primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:focus-visible,
        .nav-capsule a:focus-visible,
        .btn-accent:focus-visible,
        .faq-question:focus-visible,
        .btn-secondary:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.8125rem;
        }

        .mobile-menu {
            position: fixed;
            top: 5rem;
            left: 1rem;
            right: 1rem;
            z-index: 49;
            background: #fff;
            border-radius: 1.25rem;
            box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
            padding: 1rem;
            display: none;
            flex-direction: column;
            gap: 0.25rem;
        }

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

        .mobile-menu a {
            padding: 0.875rem 1.25rem;
            border-radius: var(--radius-full);
            font-weight: 500;
            color: var(--color-text);
            font-size: 0.9375rem;
            transition: all 0.2s ease;
        }

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

        .mobile-menu .btn-primary {
            margin-top: 0.5rem;
            text-align: center;
        }

        /* ===== 按钮 ===== */
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: var(--color-dark);
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.9375rem;
            padding: 0.875rem 2rem;
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
            transition: all 0.2s ease;
        }

        .btn-accent:hover {
            background-color: #FBBF24;
            transform: scale(1.03);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: #fff;
            color: var(--color-primary);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.875rem 1.875rem;
            transition: all 0.2s ease;
        }

        .btn-secondary:hover {
            border-color: #93C5FD;
            background-color: var(--color-primary-soft);
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .card-hover:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
        }

        /* ===== 图片遮罩 ===== */
        .img-overlay {
            position: relative;
            overflow: hidden;
        }

        .img-overlay::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.35) 100%);
            pointer-events: none;
        }

        /* ===== 区块标签 ===== */
        .eyebrow {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-accent);
            background: rgba(245, 158, 11, 0.1);
            padding: 0.25rem 0.875rem;
            border-radius: var(--radius-full);
            margin-bottom: 1rem;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            margin-bottom: 0.75rem;
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.125rem 1.5rem;
            background: transparent;
            border: none;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text);
            cursor: pointer;
            text-align: left;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: var(--color-primary-soft);
        }

        .faq-icon {
            width: 1.25rem;
            height: 1.25rem;
            border-radius: 50%;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
            font-weight: 400;
            flex-shrink: 0;
            transition: transform 0.3s ease;
            margin-left: 1rem;
        }

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

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

        .faq-answer-inner {
            padding: 0 1.5rem 1.25rem;
            color: var(--color-text-sub);
            font-size: 0.875rem;
            line-height: 1.75;
        }

        /* ===== 页脚 ===== */
        .footer-link {
            display: inline-block;
            padding: 0.375rem 0;
            font-size: 0.875rem;
            color: #94A3B8;
            transition: color 0.2s ease;
        }

        .footer-link:hover {
            color: #fff;
        }

        .social-icon {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 0.75rem;
            background: rgba(255, 255, 255, 0.08);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #CBD5E1;
            transition: all 0.2s ease;
        }

        .social-icon:hover {
            background: rgba(255, 255, 255, 0.16);
            color: #fff;
        }

        /* ===== 列表遮蔽 ===== */
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== 自定义星点背景 ===== */
        .star-field {
            position: absolute;
            inset: 0;
            pointer-events: none;
            overflow: hidden;
        }

        .star-field span {
            position: absolute;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.5);
            animation: twinkle 3s ease-in-out infinite alternate;
        }

        @keyframes twinkle {
            0% {
                opacity: 0.2;
                transform: scale(0.8);
            }
            100% {
                opacity: 0.8;
                transform: scale(1.1);
            }
        }

        /* ===== 阶梯步骤卡 ===== */
        .step-number {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 0.75rem;
        }

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-50: #EFF6FF;
            --dark: #0F172A;
            --accent: #F59E0B;
            --accent-100: #FEF3C7;
            --bg: #F8FAFC;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --muted-icon: #CBD5E1;
            --radius-lg: 16px;
            --radius-md: 12px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.10);
        }

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

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

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            min-height: 100vh;
            text-rendering: optimizeLegibility;
        }

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

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

        button,
        input,
        textarea,
        select {
            font: inherit;
            color: inherit;
        }

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

        .container {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 导航胶囊 ===== */
        .nav-capsule {
            position: fixed;
            top: 1rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 50;
            width: calc(100% - 2rem);
            max-width: 64rem;
            min-height: 3.75rem;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(1rem);
            -webkit-backdrop-filter: blur(1rem);
            border: 1px solid var(--border);
            border-radius: 9999px;
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.5rem 1rem 0.5rem 1.25rem;
            gap: 1rem;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-50);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 9999px;
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            font-size: 0.875rem;
            box-shadow: var(--shadow-md);
            transition: all 0.2s ease;
            border: 1px solid transparent;
            min-height: 44px;
        }

        .btn-primary:hover {
            background: #1D4ED8;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
        }

        .btn-primary.btn-sm {
            padding: 0.4rem 1.1rem;
            font-size: 0.8125rem;
            min-height: 38px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--border);
            border-radius: 9999px;
            padding: 0.625rem 1.25rem;
            font-weight: 600;
            font-size: 0.875rem;
            transition: all 0.2s ease;
            min-height: 44px;
        }

        .btn-secondary:hover {
            border-color: #93C5FD;
            background: var(--primary-50);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .mobile-menu {
            position: fixed;
            top: calc(1rem + 3.75rem + 0.5rem);
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 2rem);
            max-width: 24rem;
            background: #fff;
            border-radius: 1.25rem;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 0.75rem;
            display: none;
            flex-direction: column;
            gap: 0.25rem;
            z-index: 49;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.2s ease, visibility 0.2s ease;
        }

        .mobile-menu.open {
            display: flex;
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu a {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 0.75rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text);
            transition: background 0.15s ease;
            text-align: center;
        }

        .mobile-menu a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== 页脚 ===== */
        .footer-link {
            display: inline-block;
            padding: 0.5rem 0;
            font-size: 0.875rem;
            color: #94A3B8;
            transition: color 0.2s ease;
            min-height: 44px;
            line-height: 1.25rem;
        }

        .footer-link:hover {
            color: #fff;
        }

        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            background: #1E293B;
            color: #94A3B8;
            border-radius: 0.75rem;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .social-icon:hover {
            background: #334155;
            color: #fff;
        }

        /* ===== 文章区排版 ===== */
        .article-body {
            font-size: 1rem;
            line-height: 2;
            color: var(--text-secondary);
        }

        .article-body p {
            margin-bottom: 1.5rem;
            margin-top: 1.5rem;
        }

        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--dark);
            margin-top: 3rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--dark);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            line-height: 1.4;
        }

        .article-body ul {
            list-style: disc;
            padding-left: 1.5rem;
            margin: 1.25rem 0;
        }

        .article-body ol {
            list-style: decimal;
            padding-left: 1.5rem;
            margin: 1.25rem 0;
        }

        .article-body li {
            margin-bottom: 0.5rem;
            line-height: 2;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-50);
            border-radius: 0 0.75rem 0.75rem 0;
            padding: 0.75rem 1.25rem;
            margin: 1.75rem 0;
            color: var(--text-secondary);
        }

        .article-body figure {
            margin: 2rem 0;
        }

        .article-body figcaption {
            font-size: 0.8125rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 0.5rem;
        }

        .article-body img {
            border-radius: 0.75rem;
            box-shadow: var(--shadow-md);
            width: 100%;
            margin: 1.5rem 0;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body iframe {
            max-width: 100%;
            border-radius: 0.75rem;
            margin: 1.5rem 0;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb a:hover {
            color: var(--primary);
        }

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

        /* ===== 标签 / 徽章 ===== */
        .badge-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            letter-spacing: 0.02em;
        }

        .badge-amber {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            background: var(--accent-100);
            color: #B45309;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
        }

        .badge-slate {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            background: #F1F5F9;
            color: var(--text-secondary);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            overflow: hidden;
        }

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

        /* ===== 焦点可见 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 星空点缀 ===== */
        .star-dot {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(245, 158, 11, 0.4);
            border-radius: 9999px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            .nav-capsule {
                padding: 0.5rem 0.75rem 0.5rem 1rem;
            }

            .article-body {
                font-size: 0.9375rem;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .nav-capsule {
                top: 0.75rem;
                width: calc(100% - 1.5rem);
            }
        }