/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
    --primary: #0f766e;
    --primary-dark: #115e59;
    --primary-light: #14b8a6;
    --primary-soft: #ccfbf1;
    --accent: #3b82f6;
    --accent-soft: #dbeafe;
    --bg: #f0f4f8;
    --bg-deep: #e6ecf2;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #1e293b;
    --text-weak: #64748b;
    --text-faint: #94a3b8;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow: 0 6px 28px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
    --transition: all 0.3s ease;
    --space-section: 90px;
}

/* ===== 基础 Reset ===== */
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary);
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}
input, textarea {
    font-family: inherit;
}
ul, ol {
    list-style: none;
    margin: 0;
    padding: 0;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text);
    line-height: 1.3;
    margin-top: 0;
}
p {
    margin-top: 0;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ===== 通用板块 ===== */
.section-pad {
    padding: var(--space-section) 0;
}
.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 56px;
}
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 50px;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}
.section-header h2 {
    font-size: 34px;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.section-header p {
    color: var(--text-weak);
    font-size: 16px;
}

/* ===== Header / 导航面板 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(240, 244, 248, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}
.nav-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px 14px 10px 22px;
    box-shadow: var(--shadow-sm);
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.5px;
    flex-shrink: 0;
}
.brand-logo:hover {
    color: var(--primary);
}
.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
}
.nav-main {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-weak);
    transition: var(--transition);
}
.nav-link i {
    font-size: 15px;
    color: var(--text-faint);
    transition: var(--transition);
}
.nav-link:hover {
    background: var(--surface-soft);
    color: var(--primary);
}
.nav-link:hover i {
    color: var(--primary);
}
.nav-link.active {
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 600;
}
.nav-link.active i {
    color: var(--primary);
}
.nav-cta {
    background: var(--primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    padding: 10px 22px;
    border-radius: 10px;
    transition: var(--transition);
    border: none;
    flex-shrink: 0;
}
.nav-cta:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(15, 118, 110, 0.25);
}
.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--surface-soft);
    color: var(--text);
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}
.nav-toggle:hover {
    background: var(--border);
}

/* ===== Hero 首屏 ===== */
.hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 100px 0 90px;
    overflow: hidden;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.55) 55%, rgba(15, 118, 110, 0.45) 100%);
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 48px;
}
.hero-text {
    max-width: 640px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #ffffff;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 50px;
    backdrop-filter: blur(6px);
    margin-bottom: 22px;
}
.hero h1 {
    font-size: 52px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 1px;
    margin-bottom: 18px;
    line-height: 1.2;
}
.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.88);
    line-height: 1.8;
    margin-bottom: 34px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 900px;
}
.stat-card {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 22px 18px;
    text-align: center;
    backdrop-filter: blur(8px);
    transition: var(--transition);
}
.stat-card:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}
.stat-num {
    font-size: 30px;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 4px;
}
.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.78);
    letter-spacing: 0.5px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    padding: 12px 28px;
    transition: var(--transition);
    border: 2px solid transparent;
    line-height: 1.5;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 118, 110, 0.3);
}
.btn-outline-primary {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline-primary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 118, 110, 0.25);
}
.btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.6);
}
.btn-outline-light:hover {
    background: #fff;
    color: var(--text);
    border-color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.btn-light {
    background: #fff;
    color: var(--primary-dark);
    border-color: #fff;
}
.btn-light:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
    border-color: var(--primary-soft);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}
.btn-lg {
    padding: 15px 36px;
    font-size: 16px;
    border-radius: 12px;
}
.btn-sm {
    padding: 8px 18px;
    font-size: 14px;
    border-radius: 8px;
}

/* ===== 徽章标签 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 50px;
    line-height: 1.4;
}
.badge-primary {
    background: var(--primary-soft);
    color: var(--primary-dark);
}
.badge-accent {
    background: var(--accent-soft);
    color: #1d4ed8;
}
.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

/* ===== 核心说明 ===== */
.about-section {
    padding: var(--space-section) 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.about-img {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.about-img img {
    width: 100%;
    height: 380px;
    object-fit: cover;
}
.img-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
    border-radius: 12px;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    box-shadow: var(--shadow-sm);
}
.img-badge i {
    color: var(--primary);
}
.about-content h3 {
    font-size: 26px;
    margin-bottom: 16px;
    color: var(--text);
}
.about-content p {
    font-size: 15.5px;
    line-height: 1.9;
    color: var(--text-weak);
    margin-bottom: 22px;
}
.about-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}
.about-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    color: var(--text);
    padding: 8px 0;
}
.about-list li i {
    color: var(--primary);
    font-size: 18px;
    margin-top: 2px;
    flex-shrink: 0;
}

/* ===== 分类入口 ===== */
.categories-section {
    padding: var(--space-section) 0;
    background: var(--bg);
}
.category-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    box-shadow: var(--shadow-sm);
}
.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}
.category-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: var(--transition);
}
.category-card:hover img {
    transform: scale(1.03);
}
.category-body {
    padding: 28px;
}
.category-body .badge {
    margin-bottom: 14px;
}
.category-body h3 {
    font-size: 22px;
    margin-bottom: 10px;
}
.category-body p {
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--text-weak);
    margin-bottom: 20px;
}

/* ===== 最新资讯列表 ===== */
.news-section {
    padding: var(--space-section) 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.news-card {
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 0 4px 4px 0;
}
.news-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md, 0 8px 30px rgba(15, 23, 42, 0.08));
    transform: translateY(-4px);
}
.news-card:hover::before {
    height: 100%;
}
.news-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.news-cat {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
}
.news-date {
    font-size: 12.5px;
    color: var(--text-faint);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.news-card h3 {
    font-size: 17px;
    line-height: 1.5;
    margin-bottom: 12px;
}
.news-card h3 a {
    color: var(--text);
    transition: var(--transition);
}
.news-card h3 a:hover {
    color: var(--primary);
}
.news-card p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-weak);
    margin-bottom: 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.news-link:hover {
    gap: 10px;
    color: var(--primary-dark);
}
.empty-tip {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: var(--surface-soft);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-weak);
}
.empty-tip i {
    font-size: 42px;
    color: var(--text-faint);
    display: block;
    margin-bottom: 14px;
}
.empty-tip p {
    font-size: 15px;
    margin: 0;
}
.section-footer-btn {
    text-align: center;
    margin-top: 40px;
}

/* ===== 使用流程 ===== */
.process-section {
    padding: var(--space-section) 0;
    background: var(--bg);
}
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.process-step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}
.process-step:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}
.step-num {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 36px;
    font-weight: 800;
    color: var(--border);
    line-height: 1;
    opacity: 0.7;
}
.step-icon {
    width: 62px;
    height: 62px;
    border-radius: 16px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}
.process-step:hover .step-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.05);
}
.process-step h3 {
    font-size: 18px;
    margin-bottom: 10px;
}
.process-step p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ===== 平台优势 ===== */
.features-section {
    padding: var(--space-section) 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.feature-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    height: 100%;
    transition: var(--transition);
}
.feature-card:hover {
    background: var(--surface);
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
    transform: translateY(-4px);
}
.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}
.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}
.feature-card p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-weak);
    margin-bottom: 0;
}

/* ===== FAQ ===== */
.faq-section {
    padding: var(--space-section) 0;
    background: var(--bg);
}
.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover {
    border-color: var(--border-strong);
}
.faq-item.open {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    background: transparent;
    text-align: left;
    transition: var(--transition);
}
.faq-question i {
    color: var(--text-faint);
    transition: var(--transition);
    flex-shrink: 0;
}
.faq-item.open .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 22px;
}
.faq-answer p {
    font-size: 14.5px;
    line-height: 1.9;
    color: var(--text-weak);
    margin-bottom: 0;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
    padding: var(--space-section) 0;
    background: var(--surface);
}
.cta-box {
    background: linear-gradient(135deg, #0f766e 0%, #115e59 50%, #0e7490 100%);
    border-radius: 24px;
    padding: 64px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(15, 118, 110, 0.35);
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}
.cta-box::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: -60px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
}
.cta-box h2 {
    font-size: 34px;
    color: #fff;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}
.cta-box p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}
.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    position: relative;
    z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 70px 0 0;
    border-top: 3px solid var(--primary);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}
.footer-brand .brand-logo {
    color: #fff;
    margin-bottom: 16px;
    font-size: 20px;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.9;
    color: #64748b;
    margin-bottom: 20px;
}
.footer-brand .brand-logo .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 16px;
}
.footer-social {
    display: flex;
    gap: 10px;
}
.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    color: #94a3b8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    transition: var(--transition);
}
.footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}
.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}
.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-col ul a {
    font-size: 14px;
    color: #64748b;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.footer-col ul a i {
    font-size: 12px;
    color: var(--primary-light);
}
.footer-col ul a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-bottom {
    padding: 22px 0;
    text-align: center;
    font-size: 13px;
    color: #475569;
}
.footer-bottom a {
    color: #64748b;
}
.footer-bottom a:hover {
    color: var(--primary-light);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    :root {
        --space-section: 70px;
    }
    .hero h1 {
        font-size: 42px;
    }
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 768px) {
    :root {
        --space-section: 56px;
    }
    .section-header h2 {
        font-size: 26px;
    }
    .hero {
        padding: 64px 0 56px;
    }
    .hero h1 {
        font-size: 34px;
    }
    .hero-subtitle {
        font-size: 16px;
    }
    .nav-main {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        box-shadow: var(--shadow-lg);
        padding: 12px;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        overflow: hidden;
    }
    .nav-main.open {
        display: flex;
    }
    .nav-link {
        justify-content: flex-start;
        padding: 12px 16px;
        border-radius: 8px;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-cta {
        display: none;
    }
    .brand-logo {
        font-size: 18px;
    }
    .about-img img {
        height: 280px;
    }
    .category-card img {
        height: 190px;
    }
    .cta-box {
        padding: 44px 24px;
    }
    .cta-box h2 {
        font-size: 26px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
}
@media (max-width: 520px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    .section-header {
        margin-bottom: 36px;
    }
    .section-header h2 {
        font-size: 23px;
    }
    .hero h1 {
        font-size: 29px;
    }
    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .stat-card {
        padding: 16px 12px;
    }
    .stat-num {
        font-size: 24px;
    }
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    .process-steps {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        font-size: 12px;
        padding: 16px 12px;
    }
    .faq-question {
        font-size: 14.5px;
        padding: 18px;
    }
}

/* roulang page: category1 */
:root {
            --primary: #0e7a7a;
            --primary-dark: #095858;
            --primary-light: #e0f2f2;
            --accent: #eab308;
            --bg-body: #f5f8f8;
            --bg-white: #ffffff;
            --text-dark: #153131;
            --text-muted: #5f7a7a;
            --border-light: #d9e7e7;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 10px rgba(14, 122, 122, 0.06);
            --shadow-md: 0 6px 24px rgba(14, 122, 122, 0.10);
            --shadow-lg: 0 16px 40px rgba(14, 122, 122, 0.14);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .text-muted {
            color: var(--text-muted) !important;
        }

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

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

        .section-heading .overline {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 14px;
            border-radius: 30px;
            margin-bottom: 12px;
        }

        .section-heading h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 12px 0;
            color: var(--text-dark);
            letter-spacing: -0.5px;
        }

        .section-heading p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0;
        }

        .btn-ex {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 50px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            text-align: center;
        }

        .btn-ex-primary {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        .btn-ex-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-ex-outline-light {
            background-color: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.65);
        }

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

        .btn-ex-accent {
            background-color: var(--accent);
            color: #153131;
            border-color: var(--accent);
        }

        .btn-ex-accent:hover {
            background-color: #d99f06;
            border-color: #d99f06;
            color: #153131;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-ex-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 14px 0;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: #f0f7f7;
            border: 1px solid var(--border-light);
            border-radius: 18px;
            padding: 10px 20px;
            box-shadow: var(--shadow-sm);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            flex-shrink: 0;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-link i {
            font-size: 15px;
        }

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

        .nav-link.active {
            background: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(14, 122, 122, 0.25);
        }

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

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 10px;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 100px 0 90px;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(9, 66, 66, 0.88), rgba(14, 122, 122, 0.70));
            z-index: 1;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 2;
        }

        .page-banner .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 30px;
            padding: 8px 18px;
            margin-bottom: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.85);
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.9);
        }

        .page-banner .breadcrumb a:hover {
            color: #fff;
        }

        .page-banner .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
            margin: 0 2px;
        }

        .page-banner h1 {
            font-size: 46px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            margin: 0 0 16px;
            letter-spacing: -1px;
            max-width: 860px;
        }

        .page-banner .lead-text {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.90);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        /* ========== Stats ========== */
        .stats-section {
            margin-top: -48px;
            position: relative;
            z-index: 5;
            padding-bottom: 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), #2db8b8);
            border-radius: 4px 4px 0 0;
        }

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

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
            font-family: "DIN Alternate", "Segoe UI", sans-serif;
        }

        .stat-number span {
            font-size: 20px;
            font-weight: 600;
            margin-left: 2px;
        }

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

        /* ========== Core Modules ========== */
        .modules-section {
            padding-top: 80px;
        }

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

        .module-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

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

        .module-card .card-img-wrap {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

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

        .module-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .module-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(21, 49, 49, 0.45));
        }

        .module-card .card-body {
            padding: 26px 24px 28px;
            flex-grow: 1;
        }

        .module-icon {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .module-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .module-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .module-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .module-card .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ========== Process ========== */
        .process-section {
            background: linear-gradient(135deg, #eef7f7, #f7fbfb);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

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

        .process-item {
            position: relative;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }

        .process-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .process-item::before {
            counter-increment: step;
            content: counter(step, decimal-leading-zero);
            position: absolute;
            top: 18px;
            right: 20px;
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 30px;
            padding: 4px 12px;
        }

        .process-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #2db8b8);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: 0 6px 16px rgba(14, 122, 122, 0.25);
        }

        .process-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .process-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== Content List ========== */
        .list-section {
            padding: 80px 0;
        }

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

        .content-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: var(--transition);
        }

        .content-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .content-item .item-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

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

        .content-item .item-body h4 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 4px;
            color: var(--text-dark);
        }

        .content-item .item-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .content-item .item-meta {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 6px;
        }

        .content-item .item-meta .tag {
            font-size: 12px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
        }

        .content-item .item-meta .date {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #edf5f5;
            padding: 80px 0;
        }

        .faq-card {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 22px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

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

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-item .faq-body {
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 90px 0;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(9, 88, 88, 0.92), rgba(14, 122, 122, 0.78));
        }

        .cta-section .container-custom {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 640px;
            margin: 0 auto 34px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0d2b2b;
            color: #b8cece;
            padding-top: 64px;
            font-size: 14px;
        }

        .site-footer a {
            color: #b8cece;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            margin: 0 0 20px;
            color: #9dbdbd;
            max-width: 380px;
        }

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

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

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

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

        .footer-col li a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #9dbdbd;
            transition: var(--transition);
        }

        .footer-col li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-col li i {
            font-size: 12px;
            color: var(--primary);
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: #7ea3a3;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 992px) {
            .modules-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .page-banner h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }

            .nav-panel {
                flex-wrap: wrap;
                padding: 12px 16px;
            }

            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 12px;
                border-top: 1px solid var(--border-light);
                margin-top: 10px;
            }

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

            .nav-link {
                padding: 12px 16px;
                border-radius: 12px;
                border: 1px solid transparent;
                justify-content: flex-start;
            }

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

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

            .nav-toggle {
                display: block;
            }

            .nav-cta {
                margin-left: auto;
            }

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

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner .lead-text {
                font-size: 16px;
            }

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

            .cta-section h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }

            .modules-grid,
            .process-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .content-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .content-item .item-meta {
                flex-direction: row;
                align-items: center;
            }

            .page-banner h1 {
                font-size: 28px;
            }

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

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }

            .site-header {
                padding: 10px 0;
            }

            .nav-panel {
                padding: 10px 14px;
            }

            .btn-ex {
                width: 100%;
            }

            .cta-btns .btn-ex {
                width: auto;
            }
        }

/* roulang page: article */
:root {
            --primary: #0e7c7c;
            --primary-dark: #0a5d5d;
            --primary-light: #e3f4f4;
            --accent: #e5923b;
            --bg: #f4f7f8;
            --white: #ffffff;
            --text: #1c2d33;
            --text-light: #63777e;
            --border: #e3ecee;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow: 0 8px 30px rgba(14, 124, 124, .08);
            --shadow-hover: 0 14px 40px rgba(14, 124, 124, .15);
            --transition: all .25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 44px;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: .82rem;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 999px;
            letter-spacing: .04em;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-light);
            font-size: 1.02rem;
            margin-bottom: 0;
        }
        .site-header {
            position: relative;
            z-index: 100;
            padding: 0 0 6px;
        }
        .nav-panel {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 18px;
            margin-top: 16px;
            gap: 16px;
            flex-wrap: wrap;
        }
        .brand-logo {
            font-size: 1.32rem;
            font-weight: 800;
            color: var(--primary-dark);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), #1aa3a3);
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(14, 124, 124, .3);
            flex-shrink: 0;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            color: var(--text);
            font-weight: 600;
            padding: .5rem 1rem;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            white-space: nowrap;
        }
        .nav-link i {
            font-size: .9rem;
            opacity: .8;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary-dark);
            background: var(--primary-light);
        }
        .nav-cta {
            margin-left: auto;
            white-space: nowrap;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            background: var(--white);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: var(--primary-dark);
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-light);
        }
        .btn {
            border-radius: 10px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            padding: .55rem 1.35rem;
            border-radius: 10px;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(14, 124, 124, .25);
        }
        .btn-outline-primary {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
            padding: .55rem 1.35rem;
            border-radius: 10px;
        }
        .btn-outline-primary:hover,
        .btn-outline-primary:focus {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(14, 124, 124, .22);
        }
        .btn-light {
            background: #fff;
            border-color: #fff;
            color: var(--primary-dark);
            padding: .6rem 1.5rem;
            border-radius: 10px;
        }
        .btn-light:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 255, 255, .25);
        }
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, .85);
            color: #fff;
            background: transparent;
            padding: .6rem 1.5rem;
            border-radius: 10px;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .page-banner {
            background: linear-gradient(135deg, rgba(10, 92, 92, .96), rgba(14, 124, 124, .88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            padding: 70px 0 58px;
            position: relative;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: .92rem;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 22px;
        }
        .breadcrumb-nav a {
            color: rgba(255, 255, 255, .85);
        }
        .breadcrumb-nav a:hover {
            color: #fff;
        }
        .breadcrumb-nav .sep {
            opacity: .5;
        }
        .breadcrumb-nav .current {
            color: #fff;
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .banner-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 14px;
            max-width: 880px;
        }
        .banner-subtitle {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
            max-width: 720px;
            margin-bottom: 24px;
        }
        .banner-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .badge-cat,
        .badge-time {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .16);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            font-size: .85rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }
        .article-section {
            padding: 56px 0 20px;
        }
        .article-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-body {
            padding: 2.4rem 2.6rem;
        }
        .article-content {
            font-size: 1.04rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--text);
        }
        .article-content h2 {
            font-size: 1.55rem;
            border-left: 4px solid var(--primary);
            padding-left: 14px;
        }
        .article-content h3 {
            font-size: 1.3rem;
        }
        .article-content p {
            margin-bottom: 1.2rem;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
        }
        .article-content blockquote {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.4rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--primary-dark);
            margin: 1.5rem 0;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.2rem;
            padding-left: 1.4rem;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: .4rem;
        }
        .article-content a {
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            border-top: 1px solid var(--border);
            padding: 1.2rem 2.6rem;
            background: #fbfdfd;
        }
        .tag-label {
            font-weight: 700;
            color: var(--text);
            font-size: .92rem;
            margin-right: 4px;
        }
        .article-tags a {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 999px;
            padding: 4px 14px;
            font-size: .85rem;
            font-weight: 600;
        }
        .article-tags a:hover {
            background: var(--primary);
            color: #fff;
        }
        .article-links {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 20px;
            padding: 0 0 20px;
        }
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .side-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 1.5rem 1.6rem;
        }
        .side-card h3 {
            font-size: 1.06rem;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 1rem;
            padding-bottom: .75rem;
            border-bottom: 1px solid var(--border);
        }
        .side-card h3 i {
            color: var(--primary);
        }
        .article-info-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .article-info-list li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: .5rem 0;
            border-bottom: 1px dashed var(--border);
            font-size: .92rem;
        }
        .article-info-list li:last-child {
            border-bottom: none;
        }
        .article-info-list span {
            color: var(--text-light);
        }
        .article-info-list strong {
            color: var(--text);
            font-weight: 700;
            text-align: right;
        }
        .feature-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        .feature-list li {
            background: var(--primary-light);
            border-radius: 10px;
            padding: 10px 12px;
            font-size: .88rem;
            font-weight: 600;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feature-list li i {
            color: var(--primary);
        }
        .quick-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .quick-links li {
            margin-bottom: 6px;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text);
            padding: .45rem .75rem;
            border-radius: 8px;
            font-size: .92rem;
            font-weight: 600;
        }
        .quick-links a i {
            color: var(--primary);
            font-size: .85rem;
        }
        .quick-links a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .not-found-box {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            text-align: center;
            padding: 70px 24px;
            max-width: 680px;
            margin: 0 auto;
        }
        .not-found-icon {
            width: 76px;
            height: 76px;
            background: var(--primary-light);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 26px;
        }
        .not-found-box .btn {
            margin: 0 6px;
        }
        .rel-section {
            padding: 56px 0 64px;
        }
        .rel-card {
            display: block;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }
        .rel-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(14, 124, 124, .25);
        }
        .rel-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--primary-light);
        }
        .rel-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .rel-card:hover .rel-card-img img {
            transform: scale(1.05);
        }
        .img-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(14, 124, 124, .92);
            color: #fff;
            font-size: .78rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: .04em;
            backdrop-filter: blur(4px);
        }
        .rel-card-body {
            padding: 20px 22px 22px;
        }
        .rel-card-body h3 {
            font-size: 1.14rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .rel-card-body p {
            color: var(--text-light);
            font-size: .92rem;
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .rel-link {
            color: var(--primary);
            font-weight: 700;
            font-size: .9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .rel-card:hover .rel-link {
            color: var(--primary-dark);
        }
        .faq-section {
            padding: 56px 0 64px;
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .faq-accordion {
            text-align: left;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(14, 124, 124, .04);
        }
        .faq-accordion .accordion-button {
            background: var(--white);
            color: var(--text);
            font-weight: 700;
            font-size: 1rem;
            padding: 1.05rem 1.35rem;
            border: none;
            box-shadow: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid rgba(14, 124, 124, .35);
            outline-offset: -2px;
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            opacity: .7;
        }
        .faq-accordion .accordion-body {
            padding: 1.1rem 1.35rem;
            color: var(--text-light);
            line-height: 1.8;
            background: #fbfdfd;
        }
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(10, 92, 92, .94), rgba(14, 124, 124, .85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
            max-width: 620px;
            margin: 0 auto 30px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
        }
        .site-footer {
            background: #10262b;
            color: #c8d6d9;
            padding: 56px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: .92rem;
            line-height: 1.8;
            color: #9db5ba;
            max-width: 380px;
            margin-top: 14px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 18px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #c8d6d9;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: .03em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: #9db5ba;
            font-size: .9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #fff;
            transform: translateX(2px);
        }
        .footer-col ul a i {
            font-size: .8rem;
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 22px;
            text-align: center;
        }
        .footer-bottom p {
            margin: 0;
            font-size: .88rem;
            color: #7e9aa0;
        }
        @media (max-width: 991.98px) {
            .nav-panel {
                position: relative;
            }
            .nav-main {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                background: var(--white);
                border: 1px solid var(--border);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-hover);
                padding: 12px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-link {
                padding: .7rem 1rem;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-cta {
                margin-left: 0;
            }
            .article-body {
                padding: 1.6rem 1.4rem;
            }
            .article-tags {
                padding: 1rem 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767.98px) {
            .page-banner {
                padding: 50px 0 42px;
            }
            .banner-title {
                font-size: 1.7rem;
            }
            .banner-subtitle {
                font-size: .95rem;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .rel-card-body {
                padding: 18px 18px 20px;
            }
            .article-links {
                flex-direction: column;
                align-items: stretch;
            }
            .article-links .btn {
                width: 100%;
            }
        }
        @media (max-width: 575.98px) {
            .nav-panel {
                padding: 10px 12px;
                gap: 10px;
            }
            .brand-logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 38px;
                height: 38px;
            }
            .nav-cta {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1;
            }
            .not-found-box {
                padding: 44px 18px;
            }
            .not-found-box .btn {
                width: 100%;
                margin: 6px 0;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #145a72;
            --primary-dark: #0e3e50;
            --primary-light: #1f7a8c;
            --accent: #2a9d8f;
            --accent-light: #e6f4f1;
            --bg: #f5f7fa;
            --bg-deep: #eef2f6;
            --white: #ffffff;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.10);
            --transition: all 0.3s ease;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1240px;
            padding-left: 20px;
            padding-right: 20px;
            margin-inline: auto;
        }
        .site-header {
            padding-top: 20px;
            background: transparent;
            position: relative;
            z-index: 100;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 12px 24px;
            box-shadow: var(--shadow);
            flex-wrap: wrap;
            transition: var(--transition);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
        }
        .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--white);
            border-radius: 10px;
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(20, 90, 114, 0.25);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 12px;
            font-weight: 500;
            color: var(--text);
            font-size: 14px;
            transition: var(--transition);
            background: transparent;
        }
        .nav-link i {
            font-size: 13px;
            color: var(--text-weak);
            transition: var(--transition);
        }
        .nav-link:hover {
            background: var(--bg);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .nav-link:hover i {
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--accent-light);
            color: var(--primary);
            font-weight: 600;
            border: 1px solid rgba(42, 157, 143, 0.18);
        }
        .nav-link.active i {
            color: var(--accent);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: var(--white);
            border-radius: 10px;
            padding: 10px 20px;
            font-weight: 600;
            font-size: 14px;
            border: 1px solid transparent;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(20, 90, 114, 0.2);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(20, 90, 114, 0.3);
            color: var(--white);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--bg);
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--accent-light);
        }
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(14, 62, 80, 0.88), rgba(31, 122, 140, 0.72)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0 80px;
            text-align: center;
            color: var(--white);
            border-bottom: 4px solid rgba(255, 255, 255, 0.1);
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 1px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .page-hero p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .breadcrumb-bar {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 13px;
            margin-bottom: 22px;
        }
        .breadcrumb-bar a {
            opacity: 0.85;
            color: var(--white);
        }
        .breadcrumb-bar a:hover {
            opacity: 1;
        }
        .breadcrumb-bar .sep {
            opacity: 0.5;
        }
        .breadcrumb-bar .current {
            font-weight: 600;
            color: #fff;
        }
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-deep {
            background: var(--bg-deep);
        }
        .section-head {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-head .tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 30px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .section-head p {
            color: var(--text-weak);
            max-width: 600px;
            margin: 0 auto;
            font-size: 16px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }
        .stat-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 18px;
            border-radius: 16px;
            background: var(--accent-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        .stat-num {
            font-size: 38px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-weak);
        }
        .news-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(42, 157, 143, 0.3);
        }
        .news-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        }
        .news-card-body {
            padding: 24px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
            transition: var(--transition);
        }
        .news-card-body h3 a:hover {
            color: var(--primary);
        }
        .news-card-body p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }
        .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .topic-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(42, 157, 143, 0.3);
        }
        .topic-icon {
            width: 50px;
            height: 50px;
            margin: 0 auto 18px;
            border-radius: 14px;
            background: var(--accent-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }
        .topic-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .topic-card p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .ranking-list {
            counters-reset: rank;
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px 22px;
            margin-bottom: 14px;
            transition: var(--transition);
        }
        .ranking-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(6px);
            border-color: rgba(42, 157, 143, 0.3);
        }
        .ranking-index {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--bg);
            color: var(--primary);
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .ranking-item:nth-child(1) .ranking-index,
        .ranking-item:nth-child(2) .ranking-index,
        .ranking-item:nth-child(3) .ranking-index {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--white);
        }
        .ranking-info {
            flex: 1;
        }
        .ranking-info h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .ranking-info p {
            font-size: 13px;
            color: var(--text-weak);
        }
        .ranking-tag {
            font-size: 13px;
            color: var(--primary);
            background: var(--accent-light);
            padding: 5px 12px;
            border-radius: 20px;
            white-space: nowrap;
            font-weight: 500;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(42, 157, 143, 0.3);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            color: var(--text);
        }
        .faq-question .fa {
            color: var(--accent);
            font-size: 16px;
            width: 20px;
            text-align: center;
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            padding-left: 56px;
        }
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--accent));
            padding: 60px 0;
            text-align: center;
            color: var(--white);
        }
        .cta-section h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 14px;
            color: #fff;
        }
        .cta-section p {
            opacity: 0.85;
            max-width: 520px;
            margin: 0 auto 30px;
            font-size: 16px;
        }
        .btn-light-custom {
            background: var(--white);
            color: var(--primary);
            border-radius: 10px;
            padding: 12px 32px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid transparent;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
        }
        .btn-light-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
            color: var(--primary);
            background: #f0fdfa;
        }
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-logo {
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            opacity: 0.75;
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 380px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--white);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            opacity: 0.9;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--white);
            padding-left: 4px;
        }
        .footer-col ul a .fa {
            font-size: 12px;
            color: var(--accent);
        }
        .footer-bottom {
            text-align: center;
            padding: 22px 0;
            font-size: 13px;
            opacity: 0.6;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--white);
            border-radius: 10px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid transparent;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(20, 90, 114, 0.25);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(20, 90, 114, 0.35);
            color: var(--white);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border-radius: 10px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--primary);
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .hero-btn-solid {
            background: var(--white);
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .hero-btn-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
            color: var(--primary);
            background: var(--white);
        }
        .hero-btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            color: var(--white);
            border-color: rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(4px);
        }
        .hero-btn-ghost:hover {
            background: rgba(255, 255, 255, 0.22);
            color: var(--white);
            transform: translateY(-2px);
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 50px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .section {
                padding: 50px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 14px 18px;
            }
            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 12px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-cta {
                display: none;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 22px 16px;
            }
            .stat-num {
                font-size: 28px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-btn {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .ranking-item {
                flex-wrap: wrap;
                gap: 10px;
            }
            .ranking-tag {
                display: none;
            }
            .nav-link {
                font-size: 14px;
                padding: 10px 14px;
            }
        }