/* roulang page: index */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #172554;
    --primary-soft: #eff6ff;
    --accent: #d97706;
    --accent-light: #f59e0b;
    --accent-soft: #fffbeb;
    --bg: #f8fafc;
    --bg-white: #ffffff;
    --bg-dark: #0f172a;
    --bg-gray: #f1f5f9;
    --text: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
    --shadow-accent: 0 12px 32px rgba(217, 119, 6, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
    --gap: 24px;
    --header-h: 76px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

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

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

a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 3px solid rgba(59, 130, 246, 0.4);
    outline-offset: 2px;
}

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

ul, ol {
    list-style: none;
}

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

/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    height: var(--header-h);
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 24px;
}

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

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    box-shadow: var(--shadow);
}

.logo-text {
    font-size: 18px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.logo-badge {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    border: 1px solid #fde68a;
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
}

.main-nav .nav-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-light);
    border-radius: 999px;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

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

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

.main-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.header-search {
    position: relative;
    display: flex;
    align-items: center;
}

.header-search input {
    width: 180px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0 42px 0 16px;
    font-size: 14px;
    background: var(--bg-gray);
    transition: var(--transition);
}

.header-search input:focus {
    outline: none;
    border-color: var(--primary-light);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
    width: 220px;
}

.header-search button {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
    font-size: 15px;
}

.header-search button:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--bg-gray);
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    transition: var(--transition);
    line-height: 1.2;
    white-space: nowrap;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(30, 58, 138, 0.28);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
    background: #b45309;
    border-color: #b45309;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(217, 119, 6, 0.32);
}

.btn-light {
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
}

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

.btn-lg {
    padding: 16px 40px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 120px 0 100px;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.82)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
    overflow: hidden;
    color: #fff;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.2), transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 860px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    padding: 6px 20px;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(8px);
    margin-bottom: 28px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent-light), #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

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

.hero-stat .num {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}

.hero-stat .label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

.hero-scroll {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 10px;
}

.hero-scroll::before {
    content: '';
    width: 4px;
    height: 10px;
    background: #fff;
    border-radius: 4px;
    animation: scroll-pulse 1.6s infinite;
}

@keyframes scroll-pulse {
    0% { opacity: 1; transform: translateY(0); }
    70% { opacity: 0.3; transform: translateY(14px); }
    100% { opacity: 0; transform: translateY(24px); }
}

/* ===== Section common ===== */
.section {
    padding: 90px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
    border: 1px solid #dbeafe;
}

.section-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--text);
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}

.section-sub {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== Features ===== */
.features {
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

.feature-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--accent-light));
    opacity: 0;
    transition: var(--transition);
}

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

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--primary-soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(30, 58, 138, 0.2);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.75;
}

.feature-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
}

.feature-more:hover {
    gap: 8px;
    color: var(--accent);
}

/* ===== Categories ===== */
.categories {
    background: var(--bg-gray);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.category-card {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 48px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
    transition: var(--transition);
    color: #fff;
}

.category-card .cat-bg {
    position: absolute;
    inset: 0;
    background-size: cover !important;
    background-position: center !important;
}

.category-card .cat-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.2), rgba(15, 23, 42, 0.85));
    transition: var(--transition);
}

.category-card:hover .cat-overlay {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.1), rgba(15, 23, 42, 0.9));
}

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

.cat-content {
    position: relative;
    z-index: 2;
}

.cat-content .cat-label {
    display: inline-block;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    border-radius: 999px;
    padding: 4px 14px;
    font-size: 12px;
    margin-bottom: 16px;
}

.cat-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.cat-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 20px;
    line-height: 1.7;
}

.cat-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    color: var(--primary);
    padding: 10px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.cat-btn:hover {
    background: var(--accent);
    color: #fff;
    gap: 12px;
}

/* ===== News list ===== */
.news {
    background: var(--bg-white);
}

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

.news-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.news-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.news-card:hover {
    box-shadow: var(--shadow);
    border-color: transparent;
}

.news-card:hover::after {
    transform: scaleX(1);
}

.news-cat {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 14px;
    align-self: flex-start;
}

.news-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.news-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.news-meta time {
    font-size: 13px;
    color: var(--text-muted);
}

.news-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.news-link:hover {
    color: var(--accent);
    gap: 8px;
}

.news-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-gray);
    border-radius: var(--radius);
    color: var(--text-light);
    font-size: 15px;
}

/* ===== Process ===== */
.process {
    background: var(--bg-dark);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.process::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
}

.process .section-title {
    color: #fff;
}

.process .section-sub {
    color: rgba(255, 255, 255, 0.6);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 2;
    margin-top: 60px;
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 60%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.4));
}

.process-step:last-child::before {
    display: none;
}

.step-num {
    width: 80px;
    height: 80px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: var(--accent-light);
    margin: 0 auto 24px;
    transition: var(--transition);
}

.process-step:hover .step-num {
    background: var(--accent);
    color: #fff;
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(217, 119, 6, 0.3);
}

.process-step h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
}

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

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

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

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

.faq-item.open {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

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

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}

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

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

.faq-answer-inner {
    padding: 0 28px 24px;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

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

/* ===== CTA ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--primary-light));
    color: #fff;
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.25), transparent 70%);
}

.cta-section::after {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
}

.cta-inner {
    position: relative;
    z-index: 2;
    max-width: 680px;
    margin: 0 auto;
}

.cta-inner h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-inner p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 32px;
}

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

.cta-note {
    margin-top: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-dark);
    color: #94a3b8;
    padding: 80px 0 40px;
}

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

.footer-brand .logo-text {
    color: #fff;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 20px;
    max-width: 300px;
}

.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-title::before {
    content: '';
    width: 3px;
    height: 16px;
    background: var(--accent);
    border-radius: 2px;
}

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

.footer-links a {
    font-size: 14px;
    color: #94a3b8;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

.footer-bottom {
    padding-top: 32px;
    text-align: center;
    font-size: 13px;
    color: #64748b;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom a {
    color: #64748b;
}

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

/* ===== Back to top ===== */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-top:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-4px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero {
        padding: 100px 0 80px;
    }
    .hero h1 {
        font-size: 42px;
    }
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .feature-card {
        padding: 32px 24px;
    }
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    .process-step::before {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --header-h: 64px;
    }
    .container {
        padding: 0 16px;
    }
    .header-search {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        gap: 6px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
        align-items: stretch;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .main-nav .nav-link {
        padding: 14px 20px;
        border-radius: var(--radius-sm);
        text-align: center;
    }
    .hero {
        padding: 80px 0 60px;
    }
    .hero h1 {
        font-size: 34px;
    }
    .hero-sub {
        font-size: 16px;
    }
    .hero-stats {
        gap: 24px;
    }
    .section {
        padding: 64px 0;
    }
    .section-title {
        font-size: 28px;
    }
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .category-card {
        padding: 32px;
        min-height: 240px;
    }
    .news-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .news-card {
        padding: 24px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .cta-section {
        padding: 60px 0;
    }
    .cta-inner h2 {
        font-size: 28px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .back-top {
        width: 42px;
        height: 42px;
        right: 20px;
        bottom: 20px;
    }
}

@media (max-width: 520px) {
    .hero h1 {
        font-size: 28px;
    }
    .hero-sub {
        font-size: 14px;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-stats {
        gap: 20px;
    }
    .hero-stat .num {
        font-size: 28px;
    }
    .section-title {
        font-size: 24px;
    }
    .section-tag {
        font-size: 11px;
        padding: 4px 12px;
    }
    .category-card {
        padding: 24px;
    }
    .cat-content h3 {
        font-size: 22px;
    }
    .cat-btn {
        font-size: 13px;
        padding: 8px 18px;
    }
    .process-steps {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .faq-question {
        padding: 18px 20px;
        font-size: 15px;
    }
    .faq-answer-inner {
        padding: 0 20px 20px;
    }
    .cta-inner h2 {
        font-size: 24px;
    }
    .btn-lg {
        width: 100%;
    }
    .logo-text {
        font-size: 16px;
    }
    .logo-badge {
        display: none;
    }
}

/* roulang page: category1 */
:root {
            --primary: #1b2a4a;
            --primary-light: #2a4070;
            --primary-dark: #101c33;
            --accent: #d4a94e;
            --accent-light: #e6c67a;
            --accent-dark: #b88a2e;
            --bg: #f5f7fb;
            --bg-alt: #eef1f7;
            --card-bg: #ffffff;
            --text: #1e2433;
            --text-light: #5b6472;
            --text-muted: #8a94a6;
            --border: #e5e9f2;
            --radius-sm: 10px;
            --radius: 16px;
            --radius-lg: 26px;
            --shadow-sm: 0 2px 10px rgba(20, 30, 60, .06);
            --shadow: 0 12px 32px rgba(20, 30, 60, .10);
            --shadow-lg: 0 24px 60px rgba(20, 30, 60, .14);
            --transition: .3s ease;
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
            font-size: 14px;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        ::selection {
            background: rgba(212, 169, 78, .28);
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(20, 30, 60, .08);
            background: rgba(255, 255, 255, .98);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 14px rgba(27, 42, 74, .3);
        }
        .logo-text {
            font-size: 19px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
        }
        .logo-badge {
            font-size: 11px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(27, 42, 74, .06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(27, 42, 74, .08);
            font-weight: 700;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 24px;
            padding: 0 14px;
            height: 40px;
            width: 230px;
            border: 1px solid transparent;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(212, 169, 78, .18);
        }
        .header-search input {
            flex: 1;
            border: none;
            background: transparent;
            outline: none;
            color: var(--text);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search button {
            color: var(--text-light);
            display: flex;
            padding: 4px;
        }
        .header-search button:hover {
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--bg-alt);
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: all .3s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            padding: 90px 0 100px;
            background: linear-gradient(120deg, rgba(16, 28, 51, .94) 0%, rgba(27, 42, 74, .88) 50%, rgba(42, 64, 112, .78) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }
        .banner-crumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .72);
            margin-bottom: 22px;
            background: rgba(255, 255, 255, .12);
            padding: 6px 16px;
            border-radius: 30px;
            backdrop-filter: blur(4px);
        }
        .banner-crumb a:hover {
            color: var(--accent-light);
        }
        .banner-crumb .sep {
            opacity: .6;
        }
        .page-banner h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 1px;
            margin-bottom: 18px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, .3);
        }
        .page-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .82);
            max-width: 680px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .banner-btns {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 44px;
            flex-wrap: wrap;
        }
        .banner-stat {
            text-align: center;
            background: rgba(255, 255, 255, .10);
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: var(--radius);
            padding: 16px 26px;
            backdrop-filter: blur(4px);
            min-width: 140px;
        }
        .banner-stat strong {
            display: block;
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-light);
        }
        .banner-stat span {
            font-size: 13px;
            color: rgba(255, 255, 255, .76);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 6px 20px rgba(212, 169, 78, .35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(212, 169, 78, .45);
        }
        .btn-ghost-light {
            border-color: rgba(255, 255, 255, .5);
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }
        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, .16);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-primary:active,
        .btn-ghost-light:active {
            transform: translateY(0) scale(.97);
        }

        /* ========== Section ========== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 52px;
        }
        .section-header .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--accent-dark);
            background: rgba(212, 169, 78, .12);
            padding: 6px 18px;
            border-radius: 30px;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: clamp(26px, 3.6vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ========== Feature Cards ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .4s ease;
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-6px);
            border-color: rgba(212, 169, 78, .4);
        }
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 22px;
            box-shadow: 0 6px 18px rgba(27, 42, 74, .25);
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ========== Guide Cards ========== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .guide-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-8px);
            border-color: rgba(27, 42, 74, .14);
        }
        .guide-card-media {
            position: relative;
            height: 190px;
            overflow: hidden;
        }
        .guide-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .guide-card:hover .guide-card-media img {
            transform: scale(1.06);
        }
        .guide-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(4px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 20px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, .12);
        }
        .guide-card-body {
            padding: 26px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .guide-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .guide-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
            flex: 1;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-dark);
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary);
        }

        /* ========== Process ========== */
        .process-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            color: #fff;
        }
        .process-section .section-header h2 {
            color: #fff;
        }
        .process-section .section-header p {
            color: rgba(255, 255, 255, .72);
        }
        .process-section .section-header .eyebrow {
            background: rgba(212, 169, 78, .2);
            color: var(--accent-light);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .process-step {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: var(--radius-lg);
            padding: 34px 26px;
            position: relative;
            backdrop-filter: blur(4px);
            transition: background var(--transition), transform var(--transition);
        }
        .process-step:hover {
            background: rgba(255, 255, 255, .14);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 17px;
            margin-bottom: 18px;
            box-shadow: 0 4px 14px rgba(0, 0, 0, .2);
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .72);
        }
        .process-step:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 22px;
            font-weight: 700;
            z-index: 2;
            text-shadow: 0 2px 10px rgba(0, 0, 0, .3);
        }

        /* ========== Article List ========== */
        .article-wrap {
            max-width: 920px;
            margin: 0 auto;
        }
        .article-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 14px;
            transition: all var(--transition);
            position: relative;
        }
        .article-item:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
            border-color: rgba(212, 169, 78, .4);
        }
        .article-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            font-variant-numeric: tabular-nums;
            border-right: 1px solid var(--border);
            padding-right: 18px;
        }
        .article-tag {
            font-size: 12px;
            font-weight: 600;
            background: rgba(27, 42, 74, .08);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .article-content {
            flex: 1;
        }
        .article-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 4px;
            transition: color var(--transition);
        }
        .article-item:hover .article-content h4 {
            color: var(--accent-dark);
        }
        .article-content p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-arrow {
            font-size: 22px;
            color: var(--text-muted);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .article-item:hover .article-arrow {
            color: var(--accent-dark);
            transform: translateX(4px);
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            transition: all var(--transition);
            overflow: hidden;
        }
        .faq-item.active {
            border-color: rgba(212, 169, 78, .5);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 22px 26px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            position: relative;
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--bg-alt);
            transition: all var(--transition);
        }
        .faq-question .faq-icon::before,
        .faq-question .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--primary);
            border-radius: 2px;
            transition: all .3s ease;
        }
        .faq-question .faq-icon::before {
            width: 14px;
            height: 2px;
        }
        .faq-question .faq-icon::after {
            width: 2px;
            height: 14px;
        }
        .faq-item.active .faq-icon {
            background: var(--accent);
        }
        .faq-item.active .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .faq-answer-inner {
            padding: 0 26px 22px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(120deg, rgba(16, 28, 51, .95), rgba(27, 42, 74, .88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 80px 0;
            color: #fff;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: clamp(26px, 3.6vw, 36px);
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, .78);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 15px;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, .72);
            padding: 70px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 50px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 18px;
            max-width: 380px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .68);
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 26px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .7);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        .footer-brand .logo .logo-text {
            color: #fff;
        }

        /* ========== Focus / Accessibility ========== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(212, 169, 78, .5);
            outline-offset: 2px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .header-search {
                width: 170px;
            }
            .feature-grid,
            .guide-grid {
                gap: 20px;
            }
            .guide-card-media {
                height: 160px;
            }
            .process-step:not(:last-child)::after {
                display: none;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                gap: 36px;
            }
        }
        @media (max-width: 860px) {
            .header-search {
                display: none;
            }
            .header-inner {
                height: 64px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, .98);
                backdrop-filter: blur(14px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(20, 30, 60, .12);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all .4s ease;
                z-index: 99;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                padding: 14px 16px;
                border-radius: 12px;
                font-size: 15px;
            }
            .feature-grid,
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 560px) {
            .container {
                padding: 0 18px;
            }
            .section {
                padding: 60px 0;
            }
            .page-banner {
                padding: 64px 0 70px;
            }
            .banner-stats {
                gap: 12px;
            }
            .banner-stat {
                padding: 12px 18px;
                min-width: 105px;
            }
            .banner-stat strong {
                font-size: 22px;
            }
            .feature-grid,
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .guide-card-media {
                height: 190px;
            }
            .article-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 16px 18px;
            }
            .article-date {
                border-right: none;
                padding-right: 0;
                font-size: 12px;
            }
            .article-content {
                flex-basis: 100%;
            }
            .article-content h4 {
                font-size: 15px;
            }
            .article-arrow {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-btns,
            .banner-btns {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1e5eff;
            --primary-dark: #1643c4;
            --primary-light: #e8f0fe;
            --secondary: #06b6d4;
            --dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --bg: #f8fafc;
            --card-bg: #ffffff;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        body.nav-open {
            overflow: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(15, 23, 42, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 68px;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(30, 94, 255, 0.25);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .logo-badge {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

        .nav-link {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

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

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 2px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 0 6px 0 16px;
            height: 40px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 94, 255, 0.15);
        }

        .header-search input {
            background: transparent;
            border: none;
            font-size: 14px;
            width: 140px;
            color: var(--text);
        }

        .header-search input::placeholder {
            color: var(--text-light);
        }

        .header-search button {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .header-search button:hover {
            background: var(--primary-dark);
            transform: scale(1.05);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            align-items: center;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Buttons ============ */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 30px;
            box-shadow: 0 4px 16px rgba(30, 94, 255, 0.25);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 94, 255, 0.35);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--primary);
            border-radius: 30px;
            transition: var(--transition);
        }

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

        /* ============ Page Banner ============ */
        .page-banner {
            position: relative;
            padding: 72px 0 56px;
            background-size: cover;
            background-position: center;
            background-color: var(--dark);
            color: #fff;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), rgba(30, 94, 255, 0.55));
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, 0.75);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb .sep {
            margin: 0 2px;
            color: rgba(255, 255, 255, 0.5);
        }

        .banner-badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .page-banner h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            line-height: 1.3;
            font-weight: 800;
            max-width: 800px;
            margin-bottom: 16px;
        }

        .banner-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }

        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ============ Article Layout ============ */
        .article-wrap {
            padding: 48px 0 64px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 40px;
            align-items: start;
        }

        .article-main {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            border: 1px solid var(--border);
        }

        .article-thumbnail {
            width: 100%;
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 32px;
        }

        .article-thumbnail img {
            width: 100%;
            height: auto;
            min-height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-thumbnail:hover img {
            transform: scale(1.03);
        }

        .article-body {
            font-size: 16px;
            line-height: 1.9;
        }

        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
        }

        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin: 28px 0 12px;
        }

        .article-body p {
            margin-bottom: 20px;
        }

        .article-body img {
            margin: 24px 0;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
        }

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

        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
            padding-left: 4px;
        }

        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
            padding-left: 4px;
        }

        .article-body blockquote {
            padding: 20px 24px;
            margin: 24px 0;
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: normal;
        }

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

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

        .article-body table th,
        .article-body table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body table th {
            background: var(--bg);
            font-weight: 600;
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid transparent;
        }

        .article-body a:hover {
            border-bottom-color: var(--primary);
        }

        /* ============ Article Footer Tags ============ */
        .article-footer {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text);
            transition: var(--transition);
        }

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

        /* ============ Sidebar ============ */
        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .sidebar-card .card-head {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
            font-size: 16px;
            font-weight: 700;
        }

        .sidebar-card .card-head::before {
            content: '';
            width: 4px;
            height: 20px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
        }

        .sidebar-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
        }

        .sidebar-img img {
            width: 100%;
            min-height: 140px;
            object-fit: cover;
        }

        .sidebar-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }

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

        .sidebar-link:hover {
            gap: 10px;
        }

        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .sidebar-list li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }

        .sidebar-list a {
            color: var(--text);
            transition: var(--transition);
        }

        .sidebar-list a:hover {
            color: var(--primary);
        }

        /* ============ Related Section ============ */
        .related-section {
            padding: 64px 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-head .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(1.6rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .section-head p {
            color: var(--text-light);
            font-size: 15px;
        }

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

        .related-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            display: block;
        }

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

        .related-card .card-img {
            overflow: hidden;
        }

        .related-card .card-img img {
            width: 100%;
            min-height: 160px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

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

        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--dark);
            transition: var(--transition);
        }

        .related-card:hover h3 {
            color: var(--primary);
        }

        .related-card .card-meta {
            font-size: 13px;
            color: var(--text-light);
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 64px 0;
            background: var(--bg);
        }

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

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.open {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
            text-align: left;
            width: 100%;
            background: transparent;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 18px;
            color: var(--text-light);
        }

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

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, #0f172a, #1e3a8a);
            color: #fff;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-text h2 {
            font-size: clamp(1.6rem, 2.5vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-text p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
        }

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

        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
        }

        .cta-section .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
        }

        .cta-section .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ============ Not Found ============ */
        .not-found-wrap {
            padding: 80px 24px;
            display: flex;
            justify-content: center;
        }

        .not-found {
            max-width: 560px;
            width: 100%;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 56px 40px;
            text-align: center;
        }

        .not-found .nf-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--primary);
        }

        .not-found h1 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 15px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            max-width: 360px;
            color: #94a3b8;
        }

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

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

        .footer-links a {
            font-size: 14px;
            color: #94a3b8;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }

        .footer-bottom a {
            color: #94a3b8;
            transition: var(--transition);
        }

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

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

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

            .header-search input {
                width: 110px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                min-height: 60px;
                gap: 12px;
            }

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

            .logo-badge {
                font-size: 10px;
                padding: 2px 8px;
            }

            .header-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .main-nav .nav-link {
                padding: 14px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
            }

            .main-nav .nav-link.active::after {
                display: none;
            }

            .main-nav .nav-link.active {
                background: var(--primary-light);
            }

            .page-banner {
                padding: 48px 0 36px;
            }

            .page-banner h1 {
                font-size: 1.5rem;
            }

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

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

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

            .cta-inner {
                flex-direction: column;
                text-align: center;
            }

            .cta-buttons {
                justify-content: center;
            }

            .not-found {
                padding: 40px 24px;
            }
        }

        @media (max-width: 520px) {
            .logo-badge {
                display: none;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .banner-meta {
                gap: 10px;
                font-size: 13px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-main {
                padding: 20px 16px;
            }

            .related-grid {
                gap: 16px;
            }

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

            .faq-answer {
                padding: 0 16px 16px;
            }

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

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

/* roulang page: category2 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-warm: #fffbeb;
            --surface: #ffffff;
            --text: #0f172a;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 4px 14px rgba(0,0,0,.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,.06), 0 12px 32px rgba(0,0,0,.05);
            --shadow-lg: 0 12px 40px rgba(37,99,235,.12);
            --transition: .3s cubic-bezier(.4,0,.2,1);
            --container: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
            box-shadow: 0 1px 12px rgba(15, 23, 42, .04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 60%, #7c3aed 100%);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            border-radius: 12px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
        }
        .logo-badge {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 12px;
            border-radius: 20px;
            white-space: nowrap;
            letter-spacing: .02em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 32px;
            padding: 4px 4px 4px 16px;
            transition: all var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
            background: #fff;
        }
        .header-search input {
            width: 140px;
            font-size: 13px;
            color: var(--text);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search button {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            cursor: pointer;
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .header-search button:hover {
            background: var(--primary-dark);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .page-hero {
            background: linear-gradient(135deg, rgba(37, 99, 235, .92) 0%, rgba(79, 70, 229, .88) 50%, rgba(124, 58, 237, .85) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            padding: 76px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(255, 255, 255, .12) 0%, transparent 60%);
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(245, 158, 11, .18) 0%, transparent 60%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 20px;
        }
        .hero-breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .hero-breadcrumb i {
            font-size: 12px;
            opacity: .7;
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 16px rgba(15, 23, 42, .2);
        }
        .page-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .9);
            max-width: 640px;
            margin-bottom: 28px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .15);
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(8px);
            padding: 6px 16px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 500;
            color: #fff;
            transition: all var(--transition);
        }
        .hero-tag:hover {
            background: rgba(255, 255, 255, .25);
            transform: translateY(-2px);
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--surface);
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 44px;
        }
        .section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: .04em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text);
        }
        .section-desc {
            color: var(--text-light);
            font-size: 15px;
            max-width: 480px;
            line-height: 1.7;
        }
        .guide-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .guide-card:hover::before {
            opacity: 1;
        }
        .guide-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
            background: var(--primary-light);
            color: var(--primary);
        }
        .guide-card:nth-child(2) .guide-icon {
            background: #ede9fe;
            color: #7c3aed;
        }
        .guide-card:nth-child(3) .guide-icon {
            background: var(--accent-light);
            color: #d97706;
        }
        .guide-card:nth-child(4) .guide-icon {
            background: #ecfdf5;
            color: #059669;
        }
        .guide-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .guide-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .guide-card a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .guide-card a i {
            font-size: 12px;
            transition: transform var(--transition);
        }
        .guide-card a:hover i {
            transform: translateX(4px);
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .article-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: var(--primary-light);
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .article-card:hover .article-cover img {
            transform: scale(1.06);
        }
        .article-cover .cover-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, .75);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: .02em;
        }
        .article-cover .cover-tag.hot {
            background: rgba(245, 158, 11, .9);
        }
        .article-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .article-meta i {
            font-size: 12px;
        }
        .article-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
            transition: color var(--transition);
        }
        .article-card:hover .article-body h3 {
            color: var(--primary);
        }
        .article-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .article-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .article-foot a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-foot a:hover {
            color: var(--primary-dark);
        }
        .article-foot span {
            font-size: 13px;
            color: var(--text-muted);
        }
        .steps-section {
            background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
            position: relative;
            overflow: hidden;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            right: -120px;
            top: -80px;
            width: 400px;
            height: 400px;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: .08;
            border-radius: 50%;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            background: var(--primary-light);
            border: 3px solid #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .15);
        }
        .step-card:nth-child(2) .step-number {
            background: #ede9fe;
            color: #7c3aed;
            box-shadow: 0 4px 14px rgba(124, 58, 237, .15);
        }
        .step-card:nth-child(3) .step-number {
            background: var(--accent-light);
            color: #d97706;
            box-shadow: 0 4px 14px rgba(217, 119, 6, .15);
        }
        .step-card:nth-child(4) .step-number {
            background: #ecfdf5;
            color: #059669;
            box-shadow: 0 4px 14px rgba(5, 150, 105, .15);
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .tip-banner {
            margin-top: 48px;
            background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
            border-radius: var(--radius-lg);
            padding: 32px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .tip-banner::before {
            content: '';
            position: absolute;
            right: 0;
            top: 0;
            width: 180px;
            height: 100%;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: .15;
        }
        .tip-banner-content {
            position: relative;
            z-index: 2;
            flex: 1;
            min-width: 260px;
        }
        .tip-banner-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .tip-banner-content p {
            font-size: 14px;
            opacity: .85;
            line-height: 1.6;
        }
        .tip-banner .btn-light {
            position: relative;
            z-index: 2;
            background: #fff;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(15, 23, 42, .15);
        }
        .tip-banner .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(15, 23, 42, .25);
        }
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .resource-card {
            display: flex;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition);
            align-items: flex-start;
        }
        .resource-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .resource-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            background: var(--primary-light);
        }
        .resource-card:nth-child(2) .resource-icon {
            background: #ede9fe;
            color: #7c3aed;
        }
        .resource-card:nth-child(3) .resource-icon {
            background: var(--accent-light);
            color: #d97706;
        }
        .resource-card:nth-child(4) .resource-icon {
            background: #ecfdf5;
            color: #059669;
        }
        .resource-info {
            flex: 1;
        }
        .resource-info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .resource-info p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .resource-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .resource-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .resource-meta i {
            font-size: 12px;
        }
        .faq-section {
            background: var(--surface);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: var(--bg);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            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;
            cursor: pointer;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            background: transparent;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s cubic-bezier(.4, 0, .2, 1);
            padding: 0 24px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-bottom: 22px;
        }
        .cta-section {
            padding: 90px 0;
            background: linear-gradient(135deg, rgba(30, 27, 75, .95) 0%, rgba(37, 99, 235, .92) 100%), url('/assets/images/coverpic/cover-2.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, .1) 0%, transparent 50%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 32px;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 8px 28px rgba(15, 23, 42, .2);
            transition: all var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 40px rgba(15, 23, 42, .3);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, .35);
            backdrop-filter: blur(6px);
            transition: all var(--transition);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, .2);
            transform: translateY(-3px);
        }
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .logo {
            margin-bottom: 18px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
            max-width: 360px;
            margin-top: 14px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: #94a3b8;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }
        .footer-links a::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer-links a:hover::before {
            opacity: 1;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            font-size: 13px;
            color: #64748b;
            flex-wrap: wrap;
        }
        .footer-bottom a {
            color: #94a3b8;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .page-main {
            min-height: 60vh;
        }
        @media (max-width: 1024px) {
            .guide-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 12px 32px rgba(15, 23, 42, .08);
                transform: translateY(-120%);
                transition: transform .35s ease;
                z-index: 99;
                border-bottom: 1px solid var(--border);
                align-items: stretch;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .nav-link {
                display: block;
                padding: 12px 16px;
                border-radius: 12px;
            }
            .nav-link.active {
                background: var(--primary-light);
            }
            .nav-toggle {
                display: flex;
            }
            .header-search {
                display: none;
            }
            .page-hero {
                padding: 52px 0 44px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section {
                padding: 56px 0;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 32px;
            }
            .section-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
            .tip-banner {
                padding: 28px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-ghost {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 18px;
            }
            .logo-badge {
                display: none;
            }
            .guide-cards {
                grid-template-columns: 1fr;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .resource-card {
                flex-direction: column;
                gap: 12px;
            }
            .hero-tags {
                gap: 8px;
            }
            .hero-tag {
                font-size: 12px;
                padding: 4px 12px;
            }
        }
        @media (max-width: 380px) {
            .logo-badge {
                display: none;
            }
            .logo-text {
                font-size: 17px;
            }
        }