/* roulang page: index */
:root {
    --primary: #0D3B66;
    --primary-light: #1A4D7A;
    --accent: #F2A900;
    --accent-dark: #D99A00;
    --bg-light: #F5F8FC;
    --bg-alt: #EDF2F9;
    --card-bg: #FFFFFF;
    --text-main: #1A2B3C;
    --text-muted: #6B7A8D;
    --border: #E3EBF3;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-nav: 8px;
    --shadow-card: 0 4px 16px rgba(13,59,102,0.08);
    --shadow-hover: 0 8px 24px rgba(13,59,102,0.12);
    --transition: all 0.3s ease;
}

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

body {
    font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background: var(--bg-light);
    color: var(--text-main);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.4;
}

h1 {
    font-size: 32px;
}

h2 {
    font-size: 26px;
}

h3 {
    font-size: 20px;
    font-weight: 600;
}

.btn {
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 500;
    padding: 10px 24px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary-custom {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary-custom:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-main);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(242,169,0,0.3);
}

.btn-outline-custom {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-accent-custom {
    background: var(--accent);
    color: var(--text-main);
    border-color: var(--accent);
    font-weight: 600;
}

.btn-accent-custom:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(242,169,0,0.25);
}

.btn:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    box-shadow: none;
}

/* 左侧导航 */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    height: 100vh;
    background: var(--primary);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    padding: 32px 0 24px;
}

.sidebar-logo {
    padding: 0 24px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
}

.sidebar-logo a {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo .logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--primary);
}

.sidebar-nav {
    padding: 24px 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255,255,255,0.72);
    border-radius: var(--radius-nav);
    font-size: 15px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.sidebar-nav a.active {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border-left-color: var(--accent);
    font-weight: 600;
}

.sidebar-nav a i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.sidebar-footer {
    padding: 16px 24px;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    border-top: 1px solid rgba(255,255,255,0.1);
    line-height: 1.6;
}

/* 移动端头部 */
.mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1050;
    background: var(--primary);
    padding: 12px 20px;
    display: none;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 12px rgba(13,59,102,0.2);
}

.mobile-header .mobile-logo {
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mobile-header .mobile-logo .logo-icon {
    width: 28px;
    height: 28px;
    background: var(--accent);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--primary);
}

.mobile-header .navbar-toggler {
    border: 1px solid rgba(255,255,255,0.3);
    background: transparent;
    padding: 4px 10px;
    border-radius: 6px;
}

.mobile-header .navbar-toggler:focus {
    box-shadow: none;
    outline: 2px solid var(--accent);
}

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

.mobile-nav-collapse {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--primary);
    z-index: 1045;
    padding: 12px 20px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 24px rgba(13,59,102,0.3);
}

.mobile-nav-collapse a {
    display: block;
    padding: 12px 12px;
    color: rgba(255,255,255,0.8);
    border-radius: 6px;
    font-size: 15px;
    border-left: 3px solid transparent;
    transition: var(--transition);
}

.mobile-nav-collapse a:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.mobile-nav-collapse a.active {
    color: #fff;
    background: rgba(255,255,255,0.12);
    border-left-color: var(--accent);
    font-weight: 600;
}

/* 主内容区 */
.main-content {
    margin-left: 240px;
    padding: 0 32px;
    min-height: 100vh;
    background: var(--bg-light);
}

.section-block {
    margin-bottom: 64px;
}

.section-header {
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
    padding-left: 16px;
    border-left: 4px solid var(--accent);
}

.section-header p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 0;
    padding-left: 16px;
}

/* Hero */
.hero-section {
    position: relative;
    padding: 72px 56px;
    border-radius: var(--radius-card);
    background: url('/assets/images/backpic/back-1.png') no-repeat center/cover;
    margin-bottom: 64px;
    overflow: hidden;
    margin-top: 32px;
    box-shadow: var(--shadow-card);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(100deg, rgba(245,248,252,0.97) 0%, rgba(245,248,252,0.9) 45%, rgba(245,248,252,0.65) 75%, rgba(245,248,252,0.3) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
}

.hero-content h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-main);
    margin-bottom: 28px;
    line-height: 1.7;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    margin-top: 24px;
}

.stat-item {
    padding: 0 28px;
    text-align: left;
    border-right: 1px solid rgba(13,59,102,0.15);
}

.stat-item:first-child {
    padding-left: 0;
}

.stat-item:last-child {
    border-right: none;
}

.stat-num {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* 核心功能 */
.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.feature-wide {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.feature-wide:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.feature-wide .feature-text {
    flex: 1;
    padding: 32px 36px;
}

.feature-wide .feature-img {
    width: 360px;
    height: 220px;
    overflow: hidden;
    flex-shrink: 0;
}

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

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

.feature-tag {
    display: inline-block;
    background: rgba(242,169,0,0.15);
    color: #B8860B;
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
    font-weight: 500;
}

.feature-text h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-text p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.7;
}

.text-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

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

.feature-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 28px;
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, transparent 50%, rgba(242,169,0,0.12) 50%);
    border-radius: 0 0 0 60px;
}

.feature-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: rgba(13,59,102,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 20px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.65;
}

.feature-card .text-link {
    font-size: 13px;
}

/* 使用场景 */
.scenarios-section .scenario-block {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 32px;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    padding: 32px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.scenarios-section .scenario-block:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.scenarios-section .scenario-block:nth-child(even) {
    flex-direction: row-reverse;
}

.scenario-block .scenario-img {
    flex: 1;
    border-radius: var(--radius-card);
    overflow: hidden;
}

.scenario-block .scenario-img img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.scenario-block:hover .scenario-img img {
    transform: scale(1.03);
}

.scenario-block .scenario-text {
    flex: 1;
    padding: 8px;
}

.scenario-no {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-dark);
    background: rgba(242,169,0,0.12);
    padding: 4px 14px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 12px;
}

.scenario-text h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.scenario-text p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 0;
}

/* 成功案例 */
.case-timeline {
    position: relative;
    padding-left: 32px;
}

.case-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.case-item {
    position: relative;
    padding: 16px 0 24px 28px;
}

.case-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 22px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-light);
    box-shadow: 0 0 0 2px var(--accent);
}

.case-date {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-dark);
    background: rgba(242,169,0,0.1);
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 8px;
}

.case-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.case-item p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 0;
    max-width: 720px;
}

/* 价格 */
.pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 820px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 36px 32px;
    text-align: center;
    border: 2px solid transparent;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.pricing-card.recommended {
    border-color: var(--accent);
}

.pricing-card.recommended::before {
    content: '推荐';
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--text-main);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 18px;
    border-radius: 20px;
    letter-spacing: 1px;
}

.pricing-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-card .price {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 20px;
}

.pricing-card .price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-card ul {
    text-align: left;
    margin-bottom: 28px;
}

.pricing-card ul li {
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-main);
    border-bottom: 1px solid var(--bg-alt);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

.pricing-card ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 13px;
    color: var(--accent-dark);
    margin-top: 3px;
}

.pricing-note {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
}

/* 资讯列表 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.news-thumb {
    width: 140px;
    height: 100px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

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

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

.news-body {
    flex: 1;
    min-width: 0;
}

.news-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.news-body p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--text-muted);
}

.news-meta .badge {
    background: rgba(242,169,0,0.15);
    color: #B8860B;
    font-weight: 500;
    padding: 3px 12px;
    border-radius: 4px;
    font-size: 12px;
}

.news-meta .date {
    display: flex;
    align-items: center;
    gap: 4px;
}

.empty-state {
    background: rgba(13,59,102,0.04);
    border: 2px dashed rgba(13,59,102,0.2);
    border-radius: var(--radius-card);
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 36px;
    margin-bottom: 12px;
    display: block;
    color: rgba(13,59,102,0.3);
}

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

/* CTA横幅 */
.cta-banner {
    background: var(--primary);
    border-radius: var(--radius-card);
    padding: 44px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 64px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-banner::after {
    content: '';
    position: absolute;
    right: -60px;
    top: -60px;
    width: 180px;
    height: 180px;
    background: rgba(242,169,0,0.15);
    border-radius: 50%;
}

.cta-banner h2 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
    position: relative;
    z-index: 1;
    border-left: none;
    padding: 0;
}

.cta-banner p {
    color: rgba(255,255,255,0.75);
    margin-bottom: 0;
    font-size: 15px;
    position: relative;
    z-index: 1;
    padding: 0;
}

.cta-banner .btn {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
}

/* 页脚 */
.site-footer {
    background: var(--bg-alt);
    border-radius: var(--radius-card) var(--radius-card) 0 0;
    padding: 48px 40px 24px;
    margin: 0 -32px;
    border-top: 1px solid var(--border);
}

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

.footer-brand h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    padding-left: 0;
    border-left: none;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 0;
    line-height: 1.7;
    padding-left: 0;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 16px;
    padding-left: 0;
    border-left: none;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    padding: 4px 0;
    transition: color 0.3s;
}

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

.footer-contact p {
    font-size: 14px;
    color: var(--text-muted);
    padding-left: 0;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-contact p i {
    color: var(--accent-dark);
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

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

/* 响应式 */
@media (max-width: 1199.98px) {
    .feature-wide .feature-img {
        width: 280px;
    }
}

@media (max-width: 991.98px) {
    .sidebar {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
        padding: 72px 20px 0;
    }

    .mobile-header {
        display: flex;
    }

    .hero-section {
        margin-top: 0;
        padding: 48px 32px;
    }

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

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

    .feature-wide {
        grid-column: 1;
        flex-direction: column;
    }

    .feature-wide .feature-img {
        width: 100%;
        height: 220px;
    }

    .scenarios-section .scenario-block,
    .scenarios-section .scenario-block:nth-child(even) {
        flex-direction: column;
        padding: 24px;
    }

    .scenario-block .scenario-img img {
        height: 200px;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
    }

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

    .cta-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        padding: 32px 24px;
    }

    .cta-banner h2 {
        border-left: none;
        padding: 0;
    }

    .cta-banner p {
        padding: 0;
    }
}

@media (max-width: 575.98px) {
    .main-content {
        padding: 64px 16px 0;
    }

    .hero-section {
        padding: 32px 20px;
    }

    .hero-content h1 {
        font-size: 26px;
    }

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

    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }

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

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

    .stat-item {
        padding: 0 12px;
    }

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

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

    .section-header h2 {
        font-size: 22px;
    }

    .feature-wide .feature-text {
        padding: 24px;
    }

    .news-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px;
    }

    .news-thumb {
        width: 100%;
        height: 160px;
    }

    .news-meta {
        flex-wrap: wrap;
    }

    .case-timeline {
        padding-left: 24px;
    }

    .pricing-card {
        padding: 28px 22px;
    }

    .pricing-card .price {
        font-size: 34px;
    }
}

/* roulang page: article */
:root {
            --primary: #0D3B66;
            --primary-light: #1A4D7A;
            --primary-dark: #082A4C;
            --accent: #F2A900;
            --accent-dark: #D99400;
            --bg-page: #F5F8FC;
            --bg-soft: #EDF2F9;
            --card-bg: #FFFFFF;
            --text-main: #1A2B3C;
            --text-sub: #6B7A8D;
            --border-color: #E3EBF3;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 16px rgba(13, 59, 102, 0.08);
            --shadow-hover: 0 8px 24px rgba(13, 59, 102, 0.12);
            --font-stack: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --sidebar-width: 240px;
            --content-padding: 32px;
            --section-gap: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-card);
        }

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

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

        .container-page {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--content-padding);
        }

        /* ======= 左侧导航 ======= */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background-color: var(--primary);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
            overflow-y: auto;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 8px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            margin-bottom: 20px;
        }

        .sidebar-logo i {
            font-size: 26px;
            color: var(--accent);
        }

        .sidebar-logo span {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-btn);
            color: rgba(255, 255, 255, 0.82);
            font-size: 16px;
            font-weight: 500;
            transition: all 0.2s ease;
            border-left: 3px solid transparent;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

        .sidebar-nav a:hover {
            background-color: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            text-decoration: none;
        }

        .sidebar-nav a.active {
            background-color: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 16px;
            margin-top: 20px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.8;
        }

        /* ======= 右侧内容区 ======= */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .site-main {
            flex: 1;
            padding: 40px 0 64px;
        }

        /* ======= 移动端顶部导航 ======= */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background-color: var(--primary);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-logo i {
            color: var(--accent);
            font-size: 20px;
        }

        .mobile-logo span {
            color: #FFFFFF;
            font-size: 17px;
            font-weight: 700;
        }

        .navbar-toggler {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-btn);
            color: #FFFFFF;
            padding: 6px 12px;
            font-size: 18px;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            width: 100%;
            z-index: 1020;
            background-color: var(--primary);
            padding: 16px 20px 24px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .mobile-nav-panel.show {
            display: block;
        }

        .mobile-nav-panel a {
            display: block;
            padding: 12px 14px;
            color: rgba(255, 255, 255, 0.85);
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all 0.2s ease;
        }

        .mobile-nav-panel a:hover {
            background-color: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
        }

        .mobile-nav-panel a.active {
            background-color: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            border-left: 3px solid var(--accent);
            font-weight: 600;
        }

        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
            }

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

            :root {
                --content-padding: 20px;
                --section-gap: 40px;
            }
        }

        /* ======= 文章页 ======= */
        .article-header-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
            margin-bottom: 32px;
            border: 1px solid var(--border-color);
        }

        .breadcrumb-bar {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

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

        .breadcrumb-bar a:hover {
            color: var(--accent);
        }

        .breadcrumb-bar .separator {
            color: var(--text-sub);
            margin: 0 2px;
        }

        .breadcrumb-bar .current {
            color: var(--text-sub);
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            display: inline-block;
        }

        .article-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.35;
            margin: 0 0 16px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 20px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .article-meta .badge-cat {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(242, 169, 0, 0.15);
            color: var(--accent-dark);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }

        .article-meta span i {
            margin-right: 6px;
        }

        .article-summary {
            padding: 16px 20px;
            background: var(--bg-soft);
            border-radius: var(--radius-btn);
            border-left: 4px solid var(--accent);
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.8;
        }

        .article-content-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 56px;
            margin-bottom: 32px;
            border: 1px solid var(--border-color);
        }

        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
        }

        .article-content h1,
        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin: 36px 0 16px;
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin: 28px 0 12px;
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin: 24px 0 10px;
        }

        .article-content p {
            margin: 0 0 20px;
        }

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

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

        .article-content blockquote {
            background: var(--bg-soft);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
            margin: 24px 0;
            color: var(--text-main);
            font-size: 15px;
        }

        .article-content img {
            border-radius: var(--radius-card);
            margin: 24px 0;
        }

        .article-content a {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px solid var(--accent);
        }

        .article-content a:hover {
            color: var(--accent-dark);
            border-bottom-color: var(--accent-dark);
        }

        .article-empty {
            text-align: center;
            padding: 60px 30px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px dashed var(--border-color);
            margin-bottom: 32px;
        }

        .article-empty i {
            font-size: 40px;
            color: var(--text-sub);
            margin-bottom: 16px;
            display: block;
        }

        .article-empty p {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        /* ======= 相关推荐 ======= */
        .recommend-section {
            margin-bottom: 40px;
        }

        .recommend-section .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }

        .recommend-section .section-head h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            margin: 0;
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .recommend-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .recommend-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            text-decoration: none;
        }

        .recommend-card img {
            width: 100%;
            height: 130px;
            object-fit: cover;
            border-radius: 0;
        }

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

        .recommend-card-body .rec-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(242, 169, 0, 0.12);
            padding: 2px 10px;
            border-radius: 12px;
            align-self: flex-start;
            margin-bottom: 10px;
        }

        .recommend-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.5;
        }

        .recommend-card-body p {
            font-size: 13px;
            color: var(--text-sub);
            margin: 0;
        }

        .recommend-card-body .rec-time {
            font-size: 12px;
            color: var(--text-sub);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            background: #FFFFFF;
            transition: all 0.2s ease;
        }

        .btn-back:hover {
            background: var(--bg-soft);
            color: var(--primary);
            text-decoration: none;
        }

        /* ======= 按钮通用 ======= */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background-color: var(--accent);
            color: var(--primary);
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-primary-custom:focus,
        .btn-outline-custom:focus,
        .btn-back:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFFFFF;
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .btn-outline-custom:hover {
            background: var(--bg-soft);
            color: var(--primary);
            text-decoration: none;
        }

        /* ======= 页脚 ======= */
        .site-footer {
            background-color: var(--bg-soft);
            border-top: 1px solid var(--border-color);
            padding: 40px 0 24px;
            margin-left: var(--sidebar-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--content-padding);
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin: 0;
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 10px;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-contact p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact p i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-sub);
        }

        .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 991.98px) {
            .site-footer {
                margin-left: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 0 20px;
            }
        }

        /* ======= 响应式细节 ======= */
        @media (max-width: 767.98px) {
            .article-header-card {
                padding: 24px 20px;
            }

            .article-content-card {
                padding: 24px 20px;
            }

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

            .article-meta {
                gap: 10px;
                font-size: 13px;
            }

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

            .recommend-card img {
                height: 160px;
            }
        }

        @media (max-width: 575.98px) {
            :root {
                --content-padding: 16px;
                --section-gap: 40px;
            }

            .article-header-card {
                padding: 20px 16px;
                border-radius: 8px;
            }

            .article-content-card {
                padding: 20px 16px;
                border-radius: 8px;
            }

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

            .article-summary {
                padding: 12px 14px;
                font-size: 14px;
            }

            .breadcrumb-bar .current {
                max-width: 160px;
            }

            .article-content h2 {
                font-size: 20px;
            }

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

            .recommend-card img {
                height: 140px;
            }

            .btn-primary-custom,
            .btn-outline-custom,
            .btn-back {
                width: 100%;
                justify-content: center;
            }
        }

        /* ======= Bootstrap 覆写 ======= */
        .btn {
            border-radius: var(--radius-btn);
        }

        .accordion-button,
        .btn-primary,
        .btn-outline-primary {
            border-radius: var(--radius-btn) !important;
        }

        .card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card) !important;
            box-shadow: var(--shadow-card);
        }

        .accordion-item {
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-btn) !important;
            margin-bottom: 8px;
            overflow: hidden;
        }

        .accordion-button:not(.collapsed) {
            background-color: var(--bg-soft) !important;
            color: var(--primary) !important;
            box-shadow: none !important;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 2px var(--accent) !important;
        }

        .form-control {
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-btn) !important;
            padding: 10px 14px !important;
            font-size: 15px !important;
        }

        .form-control:focus {
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(242, 169, 0, 0.2) !important;
        }

        .btn:focus,
        .form-control:focus {
            outline: none !important;
        }

/* roulang page: category1 */
:root {
            --primary: #0D3B66;
            --accent: #F2A900;
            --bg: #F5F8FC;
            --bg-alt: #EDF2F9;
            --card: #FFFFFF;
            --text: #1A2B3C;
            --muted: #6B7A8D;
            --border: #E3EBF3;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(13, 59, 102, 0.08);
            --shadow-hover: 0 8px 24px rgba(13, 59, 102, 0.12);
            --font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 16px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .page-wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .main-content {
            margin-left: 240px;
            min-height: 100vh;
        }

        .section-block {
            margin-bottom: 64px;
        }

        .section-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 32px;
        }

        .section-head .bar {
            width: 4px;
            height: 28px;
            background: var(--accent);
            border-radius: 3px;
            flex-shrink: 0;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin: 0;
            letter-spacing: .5px;
        }

        .section-head p {
            margin: 0;
            font-size: 14px;
            color: var(--muted);
        }

        .btn-main {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            cursor: pointer;
        }

        .btn-main:hover {
            background: var(--accent);
            color: var(--text);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(242, 169, 0, .25);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 9px 24px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            cursor: pointer;
        }

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

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

        .btn-accent {
            background: var(--accent);
            color: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .25s ease;
        }

        .btn-accent:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(13, 59, 102, .15);
        }

        .tag {
            display: inline-block;
            background: rgba(242, 169, 0, .15);
            color: #B57F00;
            font-size: 13px;
            font-weight: 600;
            border-radius: 6px;
            padding: 4px 12px;
            line-height: 1.6;
        }

        .tag-light {
            display: inline-block;
            background: rgba(13, 59, 102, .06);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: 6px;
            padding: 3px 10px;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--primary);
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
            z-index: 105;
        }

        .sidebar-brand {
            padding: 0 12px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
            margin-bottom: 20px;
        }

        .sidebar-brand a {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-brand a i {
            color: var(--accent);
            font-size: 22px;
        }

        .sidebar-brand a:hover {
            color: #fff;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .sidebar-nav a {
            color: rgba(255, 255, 255, .72);
            text-decoration: none;
            padding: 11px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all .2s ease;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
        }

        .sidebar-nav a.active {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .sidebar-foot {
            color: rgba(255, 255, 255, .5);
            font-size: 12px;
            padding: 16px 12px 4px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            line-height: 1.6;
        }

        .sidebar-foot i {
            margin-right: 6px;
        }

        /* Mobile topbar */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 104;
            background: var(--primary);
            padding: 14px 20px;
            color: #fff;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 20px rgba(13, 59, 102, .18);
        }

        .mobile-brand {
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .mobile-brand i {
            color: var(--accent);
        }

        .mobile-brand:hover {
            color: #fff;
        }

        .mobile-toggle {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 6px 14px;
            font-size: 18px;
            line-height: 1.4;
            transition: all .2s ease;
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, .08);
            border-color: var(--accent);
        }

        .mobile-nav {
            background: var(--primary);
            padding: 8px 20px 20px;
            box-shadow: 0 12px 24px rgba(13, 59, 102, .2);
        }

        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, .8);
            padding: 13px 10px;
            text-decoration: none;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            transition: background .2s ease;
        }

        .mobile-nav a i {
            width: 20px;
            text-align: center;
        }

        .mobile-nav a:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
        }

        .mobile-nav a.active {
            color: #fff;
            background: rgba(255, 255, 255, .1);
            box-shadow: inset 3px 0 0 var(--accent);
            font-weight: 600;
        }

        /* Page banner */
        .page-banner {
            background: linear-gradient(180deg, rgba(255, 255, 255, .94), rgba(245, 248, 252, .96)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border-radius: var(--radius);
            padding: 72px 52px;
            margin-bottom: 56px;
            border: 1px solid var(--border);
            position: relative;
        }

        .page-banner .tag {
            margin-bottom: 16px;
        }

        .page-banner h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            max-width: 680px;
            margin: 10px 0 12px;
            line-height: 1.35;
        }

        .page-banner .lead {
            font-size: 17px;
            color: var(--text);
            max-width: 580px;
            margin: 0 0 28px;
            line-height: 1.8;
        }

        .banner-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Intro card */
        .intro-card {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 40px;
            align-items: center;
            border: 1px solid var(--border);
            transition: box-shadow .3s ease;
        }

        .intro-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .intro-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .intro-content>p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .intro-points {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .point-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .point-num {
            width: 30px;
            height: 30px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .point-text strong {
            display: block;
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .point-text span {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        .intro-media img {
            width: 100%;
            border-radius: var(--radius);
            aspect-ratio: 4/3;
            object-fit: cover;
            box-shadow: 0 8px 30px rgba(13, 59, 102, .12);
        }

        /* Feature rows */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin-bottom: 28px;
            border: 1px solid var(--border);
            transition: box-shadow .3s ease, transform .3s ease;
        }

        .feature-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .feature-row.reverse .feature-media {
            order: 2;
        }

        .feature-media img {
            width: 100%;
            border-radius: var(--radius);
            aspect-ratio: 4/3;
            object-fit: cover;
        }

        .feature-content .feature-tag {
            margin-bottom: 12px;
        }

        .feature-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .feature-content>p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
        }

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

        .feature-list li {
            padding: 7px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 14px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .feature-list li i {
            color: var(--accent);
            font-size: 12px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: var(--card);
            border-radius: var(--radius);
            padding: 28px 24px 24px;
            box-shadow: var(--shadow);
            border-top: 3px solid var(--accent);
            border: 1px solid var(--border);
            border-top-color: var(--accent);
            transition: box-shadow .3s ease, transform .3s ease;
            position: relative;
        }

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

        .step-num {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(242, 169, 0, .12);
            border-radius: 6px;
            padding: 3px 10px;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
            line-height: 1.7;
        }

        .step-item .step-arrow {
            position: absolute;
            right: -17px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 14px;
            z-index: 2;
        }

        .step-item:last-child .step-arrow {
            display: none;
        }

        /* Notice */
        .notice-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .notice-card {
            background: var(--card);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--accent);
            border: 1px solid var(--border);
            border-left-color: var(--accent);
            transition: box-shadow .3s ease;
        }

        .notice-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .notice-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .notice-card h3 i {
            color: var(--accent);
            font-size: 16px;
        }

        .notice-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .notice-card li {
            padding: 7px 0;
            font-size: 14px;
            color: var(--muted);
            display: flex;
            gap: 10px;
            align-items: flex-start;
        }

        .notice-card li i {
            color: var(--primary);
            font-size: 13px;
            margin-top: 6px;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-wrap {
            background: var(--card);
            border-radius: var(--radius);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .accordion-item {
            background: transparent;
            border: none;
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

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

        .accordion-button {
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 22px;
            box-shadow: none !important;
            border-radius: var(--radius-sm) !important;
            border: 1px solid var(--border);
            transition: all .2s ease;
        }

        .accordion-button:hover {
            border-color: var(--primary);
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--bg);
            border-color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
            outline: 2px solid rgba(242, 169, 0, .4);
            outline-offset: 0;
        }

        .accordion-button::after {
            background-image: none;
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent);
            width: 18px;
            height: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .25s ease;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .accordion-body {
            color: var(--muted);
            line-height: 1.8;
            font-size: 15px;
            padding: 18px 22px 22px;
            background: var(--card);
            border-left: 1px solid var(--border);
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
        }

        /* CTA strip */
        .cta-strip {
            background: var(--primary);
            border-radius: var(--radius);
            padding: 44px 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            color: #fff;
            margin-bottom: 64px;
            position: relative;
            overflow: hidden;
        }

        .cta-strip::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -30px;
            width: 180px;
            height: 180px;
            background: rgba(242, 169, 0, .12);
            border-radius: 50%;
        }

        .cta-content h3 {
            margin: 0 0 6px;
            font-size: 22px;
            font-weight: 700;
        }

        .cta-content p {
            margin: 0;
            color: rgba(255, 255, 255, .78);
            font-size: 15px;
        }

        .cta-strip .btn-accent {
            position: relative;
            z-index: 2;
            white-space: nowrap;
        }

        .cta-strip .btn-accent:hover {
            background: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            padding: 48px 0 0;
            margin-top: 40px;
        }

        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand h3 {
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            margin: 0;
        }

        .footer-links h4,
        .footer-contact h4 {
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            color: var(--muted);
            font-size: 14px;
            padding: 5px 0;
            text-decoration: none;
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .footer-contact p {
            color: var(--muted);
            font-size: 14px;
            margin: 0 0 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 32px;
            border-top: 1px solid var(--border);
            text-align: center;
        }

        .footer-bottom p {
            color: var(--muted);
            font-size: 13px;
            margin: 0;
        }

        /* Responsive */
        @media (min-width: 992px) {
            .mobile-topbar {
                display: none !important;
            }
        }

        @media (max-width: 991.98px) {
            .main-content {
                margin-left: 0;
            }

            .sidebar {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .page-wrap {
                padding: 0 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 767.98px) {
            body {
                font-size: 15px;
            }

            .page-banner {
                padding: 48px 28px;
                margin-bottom: 40px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner .lead {
                font-size: 15px;
            }

            .banner-actions {
                flex-direction: column;
                align-items: flex-start;
            }

            .banner-actions .btn-main,
            .banner-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .intro-card {
                grid-template-columns: 1fr;
                padding: 28px;
            }

            .feature-row {
                grid-template-columns: 1fr;
                padding: 28px;
                gap: 24px;
            }

            .feature-row.reverse .feature-media {
                order: 0;
            }

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

            .step-item .step-arrow {
                display: none;
            }

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

            .faq-wrap {
                padding: 20px;
            }

            .cta-strip {
                flex-direction: column;
                padding: 36px 28px;
                text-align: center;
            }

            .cta-strip .btn-accent {
                width: 100%;
                justify-content: center;
            }

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

        @media (max-width: 575.98px) {
            .page-wrap {
                padding: 0 16px;
            }

            .section-block {
                margin-bottom: 44px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .page-banner {
                padding: 40px 20px;
                border-radius: 10px;
            }

            .page-banner h1 {
                font-size: 22px;
            }

            .intro-card {
                padding: 20px;
                border-radius: 10px;
            }

            .feature-row {
                padding: 20px;
                border-radius: 10px;
            }

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

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

            .cta-strip {
                padding: 30px 20px;
                border-radius: 10px;
            }

            .cta-content h3 {
                font-size: 19px;
            }

            .faq-wrap {
                padding: 16px;
            }

            .accordion-button {
                font-size: 15px;
                padding: 15px 16px;
            }

            .accordion-body {
                font-size: 14px;
                padding: 14px 16px 18px;
            }

            .footer-grid {
                padding-left: 16px;
                padding-right: 16px;
            }

            .footer-bottom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0D3B66;
            --primary-light: #1A4B7C;
            --primary-lighter: rgba(255, 255, 255, 0.08);
            --accent: #F2A900;
            --accent-soft: rgba(242, 169, 0, 0.18);
            --bg: #F5F8FC;
            --bg-alt: #EDF2F9;
            --card-bg: #FFFFFF;
            --text: #1A2B3C;
            --text-muted: #6B7A8D;
            --border: #E3EBF3;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(13, 59, 102, 0.08);
            --shadow-hover: 0 8px 24px rgba(13, 59, 102, 0.12);
            --transition: all 0.3s ease;
            --font-stack: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

        .page-wrapper {
            min-height: 100vh;
        }

        /* ===== Sidebar 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--primary);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            overflow-y: auto;
        }

        .sidebar-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            white-space: nowrap;
            letter-spacing: 0.5px;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            gap: 12px;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 15px;
        }

        .sidebar-nav a:hover {
            background: var(--primary-lighter);
            color: #fff;
        }

        .sidebar-nav a.active {
            background: var(--primary-lighter);
            color: #fff;
            border-left-color: var(--accent);
            padding-left: 11px;
        }

        .sidebar-footer {
            margin-top: auto;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.9;
        }

        .sidebar-footer p {
            margin: 0;
            word-break: break-all;
        }

        .sidebar-toggler {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }

        .sidebar-toggler:hover {
            background: var(--primary-lighter);
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: 240px;
            min-height: 100vh;
            background: var(--bg);
            display: flex;
            flex-direction: column;
        }

        .section {
            padding: 64px 32px;
        }

        .section-heading {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .section-heading p {
            color: var(--text-muted);
            margin: 0;
            font-size: 15px;
        }

        h1,
        h2,
        h3 {
            font-weight: 700;
            color: var(--primary);
        }

        h1 {
            font-size: 32px;
        }

        h3 {
            font-size: 20px;
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .category-hero {
            background: linear-gradient(135deg, rgba(13, 59, 102, 0.92), rgba(13, 59, 102, 0.62)),
                url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            padding: 72px 48px 88px;
            color: #fff;
        }

        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .category-hero h1 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            max-width: 560px;
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 17px;
            max-width: 540px;
            margin-bottom: 28px;
        }

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

        .btn-accent {
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

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

        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: #fff;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

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

        /* ===== Stats Bar ===== */
        .stats-bar {
            display: flex;
            justify-content: center;
            gap: 40px;
            background: var(--card-bg);
            padding: 20px 32px;
            box-shadow: var(--shadow);
            margin: -32px 32px 0;
            border-radius: var(--radius);
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }

        .stat-item {
            text-align: center;
            padding: 0 16px;
        }

        .stat-item strong {
            display: block;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }

        .stat-item span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Guide Overview ===== */
        .guide-overview {
            padding-top: 64px;
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: start;
        }

        .overview-image img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .overview-toc {
            position: sticky;
            top: 24px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
        }

        .overview-toc h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }

        .overview-toc ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .overview-toc li {
            margin-bottom: 6px;
        }

        .overview-toc a {
            display: block;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
        }

        .overview-toc a:hover {
            background: var(--bg);
            color: var(--primary);
            padding-left: 18px;
        }

        /* ===== Step Cards ===== */
        .guide-steps {
            background: var(--bg-alt);
        }

        .step-card {
            display: flex;
            gap: 28px;
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }

        .step-card:hover {
            border-left-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .step-num {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            opacity: 0.22;
            line-height: 1;
            min-width: 60px;
            font-style: italic;
        }

        .step-body h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .step-body>p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 15px;
        }

        .step-body ul {
            margin: 0;
            padding-left: 20px;
            color: var(--text);
        }

        .step-body li {
            margin-bottom: 8px;
            line-height: 1.7;
            font-size: 15px;
        }

        /* ===== Notice ===== */
        .notice-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .notice-list li {
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            font-size: 15px;
        }

        .notice-list li:hover {
            box-shadow: var(--shadow-hover);
        }

        .notice-list i {
            color: var(--accent);
            font-size: 18px;
            width: 24px;
            text-align: center;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-alt);
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(13, 59, 102, 0.04);
        }

        .accordion-button {
            background: var(--card-bg);
            color: var(--text);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 24px;
            border: none;
            transition: var(--transition);
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }

        .accordion-button:not(.collapsed) {
            background: var(--card-bg);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            background-image: none;
            color: var(--accent);
            font-size: 14px;
            transition: var(--transition);
        }

        .accordion-button:not(.collapsed)::after {
            content: "\f068";
            transform: none;
        }

        .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            background: var(--card-bg);
        }

        /* ===== CTA / Form ===== */
        .cta-section {
            padding: 24px 32px 64px;
        }

        .cta-box {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px 40px;
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
            border: 1px solid var(--border);
        }

        .cta-box h2 {
            font-size: 26px;
            margin-bottom: 8px;
        }

        .cta-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .newsletter-form {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .newsletter-form input {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            width: 320px;
            max-width: 100%;
            font-size: 15px;
            color: var(--text);
            background: var(--bg);
            transition: var(--transition);
        }

        .newsletter-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px var(--accent-soft);
            outline: none;
            background: #fff;
        }

        .newsletter-form .btn-accent {
            border: none;
            cursor: pointer;
            font-size: 15px;
        }

        .form-success {
            color: var(--primary);
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 20px;
            font-size: 15px;
            margin: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            padding: 40px 32px 24px;
            margin-left: 240px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-brand h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
            margin: 0;
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 16px;
            margin-bottom: 14px;
            color: var(--primary);
        }

        .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }

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

        .footer-contact p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 8px;
        }

        .footer-contact i {
            color: var(--accent);
            margin-right: 6px;
            width: 16px;
        }

        .footer-bottom {
            text-align: center;
            border-top: 1px solid var(--border);
            margin-top: 32px;
            padding-top: 20px;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 13px;
            margin: 0;
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        .btn-accent:focus-visible,
        .btn-outline:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .section {
                padding: 56px 24px;
            }

            .category-hero {
                padding: 56px 32px 80px;
            }

            .stats-bar {
                margin-left: 24px;
                margin-right: 24px;
            }

            .overview-grid {
                grid-template-columns: 1fr 280px;
            }
        }

        @media (max-width: 991.98px) {
            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                width: 100%;
                height: auto;
                flex-direction: row;
                align-items: center;
                padding: 12px 16px;
                z-index: 1050;
                box-shadow: 0 4px 16px rgba(13, 59, 102, 0.18);
            }

            .sidebar-header {
                margin-bottom: 0;
                flex: 1;
            }

            .sidebar-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary);
                padding: 12px 16px 16px;
                flex-direction: column;
                box-shadow: 0 16px 32px rgba(13, 59, 102, 0.25);
                border-top: 1px solid rgba(255, 255, 255, 0.08);
            }

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

            .sidebar-footer {
                display: none;
            }

            .sidebar-toggler {
                display: inline-flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }

            .site-footer {
                margin-left: 0;
            }

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

            .overview-toc {
                position: static;
            }
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 40px 20px;
            }

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

            .hero-actions .btn-accent,
            .hero-actions .btn-outline {
                justify-content: center;
            }

            .stats-bar {
                flex-direction: column;
                gap: 16px;
                margin-left: 20px;
                margin-right: 20px;
            }

            .step-card {
                flex-direction: column;
                gap: 12px;
                padding: 24px;
            }

            .step-num {
                font-size: 32px;
                min-width: auto;
            }

            .notice-list {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 32px 24px;
            }

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

            .newsletter-form input {
                width: 100%;
            }
        }

        @media (max-width: 575.98px) {
            h1 {
                font-size: 26px;
            }

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

            .category-hero p {
                font-size: 15px;
            }

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

            .overview-image img {
                min-height: 200px;
            }
        }