/* roulang page: index */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #EEF2FF;
    --secondary: #06B6D4;
    --secondary-light: #ECFEFF;
    --accent: #8B5CF6;
    --bg: #F8FAFC;
    --bg-white: #FFFFFF;
    --bg-dark: #0B1026;
    --text: #0F172A;
    --text-body: #475569;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 40px rgba(79, 70, 229, 0.12);
    --shadow-primary: 0 8px 24px rgba(79, 70, 229, 0.24);
    --space-sm: 8px;
    --space: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-xxl: 72px;
    --nav-h: 72px;
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    --transition: 0.25s ease;
    --max-w: 1240px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

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

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

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

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-h);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-h);
    gap: 24px;
}

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

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: var(--shadow-primary);
}

.brand-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    margin-left: 24px;
}

.main-nav a {
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    color: var(--text-body);
    transition: all var(--transition);
    position: relative;
}

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

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

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

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

.search-box input {
    width: 220px;
    height: 40px;
    padding: 0 40px 0 36px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 14px;
    color: var(--text);
    transition: all var(--transition);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.08);
    width: 260px;
}

.search-box > i {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
    font-size: 15px;
    pointer-events: none;
}

.search-box kbd {
    position: absolute;
    right: 10px;
    font-size: 11px;
    color: var(--text-muted);
    background: var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: inherit;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(79, 70, 229, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.2);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
}

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

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

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
    border-radius: 10px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
    border-radius: 14px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

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

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

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

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    background-color: #0B1026;
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(11, 16, 38, 0.9) 0%, rgba(11, 16, 38, 0.75) 50%, rgba(79, 70, 229, 0.35) 100%);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    right: -20%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 120px 0 100px;
    max-width: var(--max-w);
    margin: 0 auto;
    width: 100%;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 40px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 28px;
    backdrop-filter: blur(4px);
}

.hero-tag i {
    color: var(--secondary);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero h1 span {
    display: block;
    background: linear-gradient(to right, #fff, rgba(255, 255, 255, 0.7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.hero-desc {
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    max-width: 560px;
    margin-bottom: 40px;
}

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

.hero-metrics {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
}

.hero-metrics span {
    display: flex;
    flex-direction: column;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    gap: 4px;
}

.hero-metrics strong {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
}

/* ===== Section ===== */
.section {
    padding: var(--space-xxl) 0;
}

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 16px;
    border-radius: 40px;
    margin-bottom: 16px;
}

.section-head h2 {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 12px;
}

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

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

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

.feature-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity var(--transition);
}

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

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 20px;
    transition: all var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.05);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

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

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

.feature-card a i {
    transition: transform var(--transition);
}

.feature-card a:hover i {
    transform: translateX(4px);
}

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

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

.category-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

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

.category-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.category-card:hover img {
    transform: scale(1.04);
}

.category-card-body {
    padding: 32px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.category-card-body .badge {
    align-self: flex-start;
    margin-bottom: 16px;
}

.category-card-body h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.category-card-body p {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--primary);
    font-size: 15px;
}

.category-link i {
    transition: transform var(--transition);
}

.category-card:hover .category-link i {
    transform: translateX(4px);
}

/* ===== Badge ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.6;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-secondary {
    background: var(--secondary-light);
    color: var(--secondary);
}

.badge-accent {
    background: rgba(139, 92, 246, 0.12);
    color: var(--accent);
}

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

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

.news-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

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

.news-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.news-card .badge {
    font-size: 12px;
}

.news-card h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
}

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

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

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

.news-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

.news-card-meta a {
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.news-card-meta a i {
    transition: transform var(--transition);
}

.news-card-meta a:hover i {
    transform: translateX(4px);
}

.empty-tip {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-tip i {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
    color: var(--border);
}

.empty-tip p {
    font-size: 16px;
}

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

.stats-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.25) 0%, transparent 60%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.stat-item {
    padding: 20px;
}

.stat-item .stat-number {
    font-size: 52px;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(to right, #fff, var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
    display: block;
    margin-bottom: 8px;
}

.stat-item .stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Process ===== */
.process-section {
    background: var(--bg);
}

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

.process-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 36px 28px;
    position: relative;
    transition: all var(--transition);
}

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

.process-card .step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 800;
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.process-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

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

.faq-list {
    max-width: 760px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    background: var(--bg-white);
    transition: all var(--transition);
    overflow: hidden;
}

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    cursor: pointer;
    font-weight: 600;
    font-size: 17px;
    background: none;
    text-align: left;
    width: 100%;
    gap: 16px;
}

.faq-question .faq-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    font-size: 14px;
}

.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;
    padding: 0 28px;
    color: var(--text-body);
    font-size: 15px;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 28px 24px;
}

/* ===== CTA ===== */
.cta-section {
    padding: var(--space-xxl) 0;
    background: var(--bg);
}

.cta-card {
    background: linear-gradient(135deg, var(--primary), var(--accent) 60%, var(--secondary));
    border-radius: var(--radius-lg);
    padding: 72px 48px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
}

.cta-card h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.cta-card p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    position: relative;
}

.cta-card .btn-white {
    background: #fff;
    color: var(--primary);
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cta-card .btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .brand-text {
    color: #fff;
    font-size: 22px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 16px;
    max-width: 320px;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

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

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    flex-wrap: wrap;
    gap: 12px;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    width: 100%;
    background: #fff;
    z-index: 99;
    padding: 24px;
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid var(--border);
}

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

.mobile-menu a {
    padding: 14px 16px;
    border-radius: 10px;
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
}

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

.mobile-menu a.active {
    background: var(--primary-light);
    color: var(--primary);
}

.mobile-menu .btn {
    margin-top: 8px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero h1 {
        font-size: 42px;
    }
    .search-box input {
        width: 160px;
    }
    .search-box input:focus {
        width: 190px;
    }
}

@media (max-width: 900px) {
    .main-nav {
        display: none;
    }
    .header-actions .search-box {
        display: none;
    }
    .header-actions .btn {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 48px 0;
    }
    .section-head h2 {
        font-size: 28px;
    }
    .hero {
        min-height: 520px;
    }
    .hero-content {
        padding: 80px 0 60px;
    }
    .hero h1 {
        font-size: 32px;
    }
    .hero-desc {
        font-size: 16px;
    }
    .hero-actions .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    .hero-metrics {
        gap: 24px;
    }
    .hero-metrics strong {
        font-size: 22px;
    }
    .category-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .stat-item .stat-number {
        font-size: 36px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .cta-card {
        padding: 48px 24px;
    }
    .cta-card h2 {
        font-size: 26px;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .features-grid,
    .news-grid,
    .process-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 28px;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .section-head h2 {
        font-size: 24px;
    }
    .news-card-meta {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

/* roulang page: category1 */
/* ===== Design Tokens ===== */
:root{
  --color-primary:#2563eb;
  --color-primary-light:#3b82f6;
  --color-primary-dark:#1d4ed8;
  --color-accent:#06b6d4;
  --color-accent-light:#22d3ee;
  --color-bg:#f8fafc;
  --color-surface:#ffffff;
  --color-surface-2:#f1f5f9;
  --color-text:#0f172a;
  --color-text-light:#475569;
  --color-text-weak:#94a3b8;
  --color-border:#e2e8f0;
  --color-border-dark:#cbd5e1;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --radius-xl:32px;
  --shadow-sm:0 2px 8px rgba(15,23,42,.06);
  --shadow-md:0 8px 24px rgba(15,23,42,.08);
  --shadow-lg:0 18px 50px rgba(37,99,235,.12);
  --space-section:110px;
  --container:1200px;
  --transition:.28s cubic-bezier(.4,0,.2,1);
}
/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","HarmonicOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--color-primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--color-primary-dark)}
img{max-width:100%;display:block;border-radius:var(--radius-md)}
ul,ol{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer}
input,textarea,select{font-family:inherit;outline:none}
.container{width:min(var(--container),92%);margin:0 auto}
.section{padding:var(--space-section) 0}
.section-tight{padding:60px 0}
/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:999px;font-weight:600;font-size:15px;line-height:1.4;transition:all var(--transition);border:2px solid transparent;text-align:center}
.btn i{font-size:.9em}
.btn-primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary);box-shadow:0 6px 18px rgba(37,99,235,.28)}
.btn-primary:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 28px rgba(37,99,235,.36)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(37,99,235,.22)}
.btn-ghost{background:transparent;color:var(--color-text);border-color:var(--color-border-dark)}
.btn-ghost:hover{border-color:var(--color-primary);color:var(--color-primary);background:rgba(37,99,235,.04)}
.btn-light{background:#fff;color:var(--color-text);border-color:#fff;box-shadow:var(--shadow-md)}
.btn-light:hover{background:var(--color-surface);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-sm{padding:9px 22px;font-size:14px}
.btn-lg{padding:16px 38px;font-size:16px}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:3px}
/* ===== Header / Navigation ===== */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(226,232,240,.7)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--color-text);letter-spacing:-.01em}
.brand-logo{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;box-shadow:0 4px 14px rgba(37,99,235,.32)}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:10px}
.main-nav a{padding:9px 18px;border-radius:999px;font-weight:500;font-size:15px;color:var(--color-text-light);transition:all var(--transition)}
.main-nav a:hover{background:var(--color-surface-2);color:var(--color-text)}
.main-nav a.active{background:rgba(37,99,235,.1);color:var(--color-primary);font-weight:600}
.header-actions{display:flex;align-items:center;gap:14px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:999px;padding:7px 16px;width:230px;transition:all var(--transition)}
.search-box:focus-within{border-color:var(--color-primary);background:#fff;box-shadow:0 0 0 4px rgba(37,99,235,.08)}
.search-box i{color:var(--color-text-weak);font-size:13px}
.search-box input{border:none;background:transparent;font-size:14px;flex:1;color:var(--color-text)}
.search-box input::placeholder{color:var(--color-text-weak)}
.search-box kbd{font-size:11px;background:#e2e8f0;padding:2px 7px;border-radius:5px;color:#64748b;font-family:inherit;border:1px solid #cbd5e1;white-space:nowrap}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border-radius:10px;align-items:center;background:var(--color-surface-2)}
.nav-toggle span{width:20px;height:2px;background:var(--color-text);border-radius:2px;transition:all var(--transition)}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ===== Page Hero ===== */
.cat-hero{position:relative;background:linear-gradient(135deg,#0f172a 0%,#1e293b 46%,#2563eb 120%);overflow:hidden;color:#fff}
.cat-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.22}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,23,42,.82) 0%,rgba(15,23,42,.45) 60%,rgba(37,99,235,.15) 100%);}
.cat-hero .container{position:relative;z-index:2;padding:80px 0;display:flex;align-items:center;min-height:320px}
.cat-hero-content{max-width:720px}
.cat-hero .breadcrumb{display:flex;gap:8px;font-size:14px;color:rgba(255,255,255,.7);margin-bottom:18px;align-items:center;flex-wrap:wrap}
.cat-hero .breadcrumb i{font-size:12px}
.cat-hero .breadcrumb a{color:rgba(255,255,255,.85)}
.cat-hero .breadcrumb a:hover{color:#fff}
.cat-hero h1{font-size:clamp(30px,4.6vw,48px);line-height:1.15;font-weight:800;margin-bottom:16px;letter-spacing:-.02em}
.cat-hero h1 .grad-text{background:linear-gradient(90deg,#7dd3fc,#a5b4fc);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.cat-hero p{font-size:clamp(16px,1.6vw,19px);line-height:1.8;color:rgba(255,255,255,.85);max-width:600px;margin-bottom:30px}
.cat-hero .hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ===== Section Header ===== */
.section-head{text-align:center;max-width:680px;margin:0 auto 54px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(37,99,235,.08);border-radius:999px;padding:7px 18px;font-size:13px;font-weight:600;color:var(--color-primary);margin-bottom:16px}
.section-head .eyebrow i{font-size:12px}
.section-head h2{font-size:clamp(26px,3.2vw,38px);font-weight:800;line-height:1.2;letter-spacing:-.02em;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--color-text-light);line-height:1.8}
.section-head.light h2{color:#fff}
.section-head.light p{color:rgba(255,255,255,.8)}

/* ===== Feature Cards ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 28px;position:relative;overflow:hidden;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.feature-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));opacity:0;transition:opacity var(--transition)}
.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-card:hover::before{opacity:1}
.feature-card .card-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:20px;background:rgba(37,99,235,.1);color:var(--color-primary)}
.feature-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--color-text-light);line-height:1.75}
.feature-card .card-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--color-primary)}
.feature-card .card-link i{transition:transform var(--transition);font-size:12px}
.feature-card .card-link:hover i{transform:translateX(4px)}

/* ===== Feature Detail Alternating ===== */
.detail-block{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:36px 0}
.detail-block.reverse .detail-media{order:2}
.detail-media img{border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);aspect-ratio:4/3;object-fit:cover;width:100%}
.detail-content .tag-pill{display:inline-block;background:var(--color-accent);color:#fff;font-size:12.5px;font-weight:600;padding:4px 14px;border-radius:999px;margin-bottom:14px}
.detail-content h3{font-size:26px;font-weight:800;line-height:1.25;margin-bottom:14px}
.detail-content p{color:var(--color-text-light);font-size:15.5px;line-height:1.85;margin-bottom:18px}
.detail-points{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.detail-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--color-text-light)}
.detail-points li i{color:var(--color-primary);margin-top:4px;font-size:14px;width:18px;text-align:center;flex-shrink:0}

/* ===== Stats Band ===== */
.stats-band{background:linear-gradient(135deg,#0f172a,#1e293b);position:relative;overflow:hidden}
.stats-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');background-size:cover;background-position:center;opacity:.13}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding:70px 0;position:relative;z-index:2}
.stat-item{text-align:center;padding:20px 12px}
.stat-item .stat-num{font-size:clamp(34px,4vw,54px);font-weight:800;background:linear-gradient(90deg,#7dd3fc,#a5b4fc);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.1;margin-bottom:8px}
.stat-item .stat-label{color:rgba(255,255,255,.75);font-size:15px}

/* ===== Scenario Cards ===== */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.scenario-card{background:var(--color-surface);border-radius:var(--radius-lg);padding:30px 32px;border:1px solid var(--color-border);display:flex;gap:20px;align-items:flex-start;transition:all var(--transition)}
.scenario-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.scenario-card .scen-icon{flex-shrink:0;width:46px;height:46px;border-radius:12px;background:rgba(37,99,235,.09);color:var(--color-primary);display:flex;align-items:center;justify-content:center;font-size:18px}
.scenario-card h4{font-size:17px;font-weight:700;margin-bottom:6px}
.scenario-card p{font-size:14px;color:var(--color-text-light);line-height:1.7}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:0;transition:border-color var(--transition),box-shadow var(--transition);overflow:hidden}
.faq-item:hover{border-color:var(--color-border-dark)}
.faq-item.open{border-color:var(--color-primary);box-shadow:var(--shadow-md)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;font-size:16px;font-weight:600;color:var(--color-text);cursor:pointer;text-align:left}
.faq-q i{font-size:14px;color:var(--color-text-weak);transition:transform var(--transition);flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--color-primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 26px}
.faq-item.open .faq-a{max-height:400px;padding-bottom:24px}
.faq-a p{font-size:14.5px;color:var(--color-text-light);line-height:1.8}

/* ===== CTA ===== */
.cta-band{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 55%,var(--color-accent) 130%);border-radius:var(--radius-xl);padding:70px 50px;margin:110px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.12}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:620px;margin:0 auto}
.cta-inner h2{font-size:clamp(26px,3vw,38px);font-weight:800;color:#fff;margin-bottom:14px;letter-spacing:-.02em}
.cta-inner p{color:rgba(255,255,255,.86);font-size:16px;margin-bottom:28px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:#0f172a;color:#94a3b8;padding-top:80px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:300px}
.footer-col h4{font-size:15px;font-weight:600;color:#e2e8f0;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li{font-size:14px;display:flex;align-items:center;gap:9px}
.footer-col a{color:#94a3b8;display:inline-flex;align-items:center;gap:6px;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-col i{color:#64748b;font-size:13px;width:16px;text-align:center}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#64748b}
@media (max-width:1024px){
  :root{--space-section:80px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .header-actions .search-box{width:150px}
  .header-actions .search-box kbd{display:none}
  .detail-block{gap:40px}
  .stats-grid{gap:16px}
}
@media (max-width:768px){
  .header-inner{height:64px}
  .main-nav{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:16px 20px;box-shadow:0 20px 40px rgba(15,23,42,.12);border-bottom:1px solid var(--color-border);transform:translateY(-130%);transition:transform .4s ease;z-index:999}
  .main-nav.show{transform:translateY(0)}
  .main-nav a{padding:12px 18px;border-radius:12px;text-align:center}
  .main-nav a.active{background:rgba(37,99,235,.08)}
  .header-actions .search-box{display:none}
  .nav-toggle{display:flex}
  .header-actions .btn{display:none}
  .cat-hero .container{padding:56px 0}
  .feature-grid{grid-template-columns:1fr}
  .detail-block{grid-template-columns:1fr;padding:20px 0}
  .detail-block.reverse .detail-media{order:0}
  .detail-media img{aspect-ratio:16/10}
  .stats-grid{grid-template-columns:repeat(2,1fr);padding:50px 0}
  .scenario-grid{grid-template-columns:1fr}
  .cta-band{padding:50px 28px;margin:70px 0}
  .footer-grid{grid-template-columns:1fr;gap:36px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}
@media (max-width:520px){
  .cat-hero h1{font-size:28px}
  .cat-hero p{font-size:15px}
  .section-head{padding:0 8px}
  .section-head h2{font-size:24px}
  .feature-card{padding:26px 20px}
  .detail-content h3{font-size:21px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:8px}
  .stat-item{padding:14px 8px}
  .stat-item .stat-num{font-size:32px}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
}

/* roulang page: article */
:root{
            --color-primary:#4f46e5;
            --color-primary-dark:#4338ca;
            --color-primary-light:#eef2ff;
            --color-accent:#06b6d4;
            --color-accent-light:#cffafe;
            --color-bg:#ffffff;
            --color-bg-alt:#f8fafc;
            --color-bg-dark:#0f172a;
            --color-text:#1e293b;
            --color-text-light:#64748b;
            --color-text-lighter:#94a3b8;
            --color-border:#e2e8f0;
            --radius-sm:8px;
            --radius-md:16px;
            --radius-lg:24px;
            --shadow-sm:0 1px 3px rgba(15,23,42,.08);
            --shadow-md:0 10px 30px rgba(15,23,42,.08);
            --shadow-lg:0 24px 60px rgba(15,23,42,.12);
            --space-section:80px;
            --font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,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-family);font-size:16px;line-height:1.7;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}
        img{max-width:100%;display:block}
        a{color:inherit;text-decoration:none}
        ul,ol{list-style:none}
        button,input{font:inherit;border:none;background:none}
        .container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
        .skip-link{position:absolute;left:-999px;top:0;z-index:2000;background:var(--color-primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;font-size:14px}
        .skip-link:focus{left:0}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:12px 24px;font-size:15px;font-weight:600;line-height:1.4;cursor:pointer;transition:all .25s ease;text-align:center;white-space:nowrap}
        .btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 4px 14px rgba(79,70,229,.3)}
        .btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(79,70,229,.4)}
        .btn-primary:active{transform:translateY(0)}
        .btn-outline{background:transparent;border:1px solid var(--color-border);color:var(--color-text)}
        .btn-outline:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-light)}
        .btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}
        .btn-block{display:flex;width:100%}
        .site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(226,232,240,.8);transition:box-shadow .3s ease}
        .site-header.scrolled{box-shadow:0 4px 20px rgba(15,23,42,.06)}
        .header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
        .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
        .brand-logo{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:#fff;font-size:18px;box-shadow:0 4px 12px rgba(79,70,229,.3)}
        .brand-text{font-size:19px;font-weight:700;color:var(--color-text);letter-spacing:-.3px}
        .main-nav{display:flex;align-items:center;gap:6px}
        .main-nav a{display:inline-flex;align-items:center;padding:9px 16px;border-radius:10px;font-size:15px;font-weight:500;color:var(--color-text-light);transition:all .2s ease;position:relative}
        .main-nav a:hover{color:var(--color-primary);background:var(--color-primary-light)}
        .main-nav a.active{color:var(--color-primary);font-weight:600;background:var(--color-primary-light)}
        .header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
        .search-box{position:relative;display:flex;align-items:center}
        .search-box input{width:200px;height:40px;padding:0 14px 0 36px;border-radius:12px;border:1px solid var(--color-border);background:var(--color-bg-alt);font-size:14px;color:var(--color-text);transition:border-color .25s,box-shadow .25s,width .3s}
        .search-box input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(79,70,229,.12);width:230px;background:#fff}
        .search-box i{position:absolute;left:12px;color:var(--color-text-lighter);font-size:14px;pointer-events:none}
        .search-box kbd{position:absolute;right:10px;font-size:11px;color:var(--color-text-lighter);background:#fff;border:1px solid var(--color-border);border-radius:5px;padding:2px 5px;font-family:inherit}
        .nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border-radius:10px;cursor:pointer;padding:8px;transition:background .2s}
        .nav-toggle span{display:block;width:20px;height:2px;background:var(--color-text);border-radius:2px;margin:0 auto;transition:all .3s ease}
        .nav-toggle:hover{background:var(--color-bg-alt)}
        .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)}
        .mobile-menu{display:none;background:var(--color-bg);border-bottom:1px solid var(--color-border);padding:8px 24px 16px;box-shadow:var(--shadow-sm)}
        .mobile-menu.open{display:block}
        .mobile-menu a{display:block;padding:12px 10px;border-radius:10px;font-size:15px;font-weight:500;color:var(--color-text)}
        .mobile-menu a:hover,.mobile-menu a.active{color:var(--color-primary);background:var(--color-primary-light)}
        .mobile-menu .btn{margin-top:8px}
        .article-hero{position:relative;padding:58px 0 64px;background:linear-gradient(135deg,rgba(15,23,42,.94),rgba(79,70,229,.82)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;color:#fff}
        .article-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 20%,rgba(6,182,212,.25),transparent 70%);pointer-events:none}
        .article-hero .container{position:relative;z-index:2}
        .breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:22px}
        .breadcrumb a{color:rgba(255,255,255,.82);transition:color .2s}
        .breadcrumb a:hover{color:#fff}
        .breadcrumb i{font-size:10px;color:rgba(255,255,255,.4)}
        .breadcrumb .current{color:#fff;font-weight:500;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
        .article-hero h1{font-size:clamp(26px,4vw,40px);line-height:1.25;font-weight:700;letter-spacing:-.5px;max-width:820px;margin-bottom:14px}
        .article-desc{font-size:16px;line-height:1.75;color:rgba(255,255,255,.78);max-width:720px;margin-bottom:20px}
        .article-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
        .meta-item{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:rgba(255,255,255,.75);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12);padding:6px 14px;border-radius:999px;backdrop-filter:blur(6px)}
        .meta-item i{font-size:13px}
        .article-wrap{padding:var(--space-section) 0 60px;background:var(--color-bg-alt)}
        .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
        .article-content-col{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:36px 40px;box-shadow:var(--shadow-sm)}
        .article-content{font-size:16.5px;line-height:1.9;color:#334155}
        .article-content h2{font-size:24px;line-height:1.4;color:var(--color-bg-dark);margin:32px 0 14px;padding-bottom:10px;border-bottom:2px solid var(--color-primary-light)}
        .article-content h3{font-size:20px;line-height:1.45;color:var(--color-bg-dark);margin:26px 0 12px}
        .article-content p{margin:14px 0}
        .article-content a{color:var(--color-primary);text-decoration:underline;text-underline-offset:3px}
        .article-content a:hover{color:var(--color-primary-dark)}
        .article-content ul,.article-content ol{padding-left:22px;margin:14px 0}
        .article-content ul{list-style:disc}
        .article-content ol{list-style:decimal}
        .article-content li{margin:6px 0}
        .article-content img{border-radius:var(--radius-md);box-shadow:var(--shadow-md);margin:22px 0}
        .article-content blockquote{border-left:4px solid var(--color-primary);background:#f8fafc;padding:14px 20px;border-radius:0 var(--radius-md) var(--radius-md) 0;margin:20px 0;color:#475569}
        .article-content blockquote p{margin:0}
        .article-content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
        .article-content th,.article-content td{border:1px solid var(--color-border);padding:10px 14px;text-align:left}
        .article-content th{background:var(--color-primary-light);font-weight:600;color:var(--color-bg-dark)}
        .article-content tr:nth-child(even) td{background:#fafbfc}
        .article-content code{background:#f1f5f9;padding:2px 7px;border-radius:5px;font-size:.9em;font-family:"SF Mono",Consolas,monospace}
        .article-content pre{background:var(--color-bg-dark);color:#e2e8f0;border-radius:12px;padding:18px;overflow-x:auto;margin:20px 0;font-size:14px;line-height:1.7}
        .article-content pre code{background:transparent;color:inherit;padding:0;border-radius:0}
        .article-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:36px;padding-top:24px;border-top:1px solid var(--color-border)}
        .article-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
        .tag{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;background:var(--color-bg-alt);border:1px solid var(--color-border);font-size:13px;color:var(--color-text-light)}
        .tag i{font-size:11px}
        .article-share{display:flex;align-items:center;gap:6px}
        .share-btn{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:var(--color-bg-alt);border:1px solid var(--color-border);color:var(--color-text-light);cursor:pointer;transition:all .2s;font-size:14px}
        .share-btn:hover{color:var(--color-primary);border-color:var(--color-primary);background:var(--color-primary-light);transform:translateY(-2px)}
        .not-found{text-align:center;padding:60px 20px}
        .not-found i{font-size:44px;color:var(--color-text-lighter);margin-bottom:18px}
        .not-found h2{font-size:24px;margin-bottom:10px;color:var(--color-text)}
        .not-found p{color:var(--color-text-light);margin-bottom:24px}
        .article-sidebar{display:flex;flex-direction:column;gap:24px}
        .side-card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-sm)}
        .side-card h4{font-size:16px;font-weight:600;color:var(--color-text);display:flex;align-items:center;gap:8px;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--color-border)}
        .side-card h4 i{color:var(--color-primary)}
        .side-meta-list li{display:flex;justify-content:space-between;gap:12px;font-size:14px;padding:9px 0;border-bottom:1px dashed #f1f5f9;color:var(--color-text-light)}
        .side-meta-list li:last-child{border-bottom:none}
        .side-meta-list li span{color:var(--color-text-lighter)}
        .side-meta-list li a{color:var(--color-primary);font-weight:500}
        .side-meta-list li a:hover{text-decoration:underline}
        .side-nav-list li{margin-bottom:6px}
        .side-nav-list a{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-radius:12px;background:var(--color-bg-alt);border:1px solid var(--color-border);font-size:14px;font-weight:500;color:var(--color-text);transition:all .2s}
        .side-nav-list a:hover{background:var(--color-primary-light);border-color:var(--color-primary);color:var(--color-primary);transform:translateX(3px)}
        .side-nav-list a i{font-size:12px;color:var(--color-text-lighter)}
        .side-ad{border-radius:var(--radius-md);overflow:hidden;position:relative;background:linear-gradient(145deg,#1e293b,#312e81);color:#fff;box-shadow:var(--shadow-md)}
        .side-ad img{width:100%;height:120px;object-fit:cover;opacity:.5}
        .side-ad-body{padding:22px 22px 24px;position:relative}
        .side-ad-body h4{font-size:17px;font-weight:700;margin-bottom:8px}
        .side-ad-body p{font-size:13.5px;color:rgba(255,255,255,.75);line-height:1.7;margin-bottom:16px}
        .related-section{padding:var(--space-section) 0;background:#fff}
        .related-section .section-head{text-align:center;max-width:620px;margin:0 auto 44px}
        .section-tag{display:inline-block;padding:5px 14px;border-radius:999px;background:var(--color-primary-light);color:var(--color-primary);font-size:13px;font-weight:600;margin-bottom:14px}
        .related-section .section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--color-text);letter-spacing:-.4px;margin-bottom:10px}
        .related-section .section-head p{color:var(--color-text-light);font-size:15px}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
        .related-card{display:block;background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;transition:all .3s ease;box-shadow:var(--shadow-sm)}
        .related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
        .related-cover{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--color-bg-alt)}
        .related-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
        .related-card:hover .related-cover img{transform:scale(1.06)}
        .related-badge{position:absolute;left:14px;top:14px;z-index:2;display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:rgba(15,23,42,.72);color:#fff;font-size:12px;font-weight:500;backdrop-filter:blur(6px)}
        .related-body{padding:20px 20px 22px}
        .related-body h3{font-size:16.5px;line-height:1.5;font-weight:600;color:var(--color-text);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-body p{font-size:14px;color:var(--color-text-light);line-height:1.65;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-date{font-size:13px;color:var(--color-text-lighter);display:flex;align-items:center;gap:6px}
        .related-date i{font-size:12px}
        .cta-section{padding:72px 0;background:var(--color-bg-dark);position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.18}
        .cta-section::after{content:'';position:absolute;inset:0;background:radial-gradient(800px 400px at 70% 30%,rgba(6,182,212,.22),transparent 70%);pointer-events:none}
        .cta-inner{position:relative;z-index:2;max-width:700px;margin:0 auto;text-align:center;color:#fff}
        .cta-inner h2{font-size:clamp(26px,3.5vw,36px);font-weight:700;letter-spacing:-.4px;margin-bottom:14px}
        .cta-inner p{font-size:16px;color:rgba(255,255,255,.78);margin-bottom:32px}
        .cta-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
        .cta-btns .btn-primary{background:#fff;color:var(--color-primary);box-shadow:0 4px 20px rgba(0,0,0,.15)}
        .cta-btns .btn-primary:hover{background:var(--color-primary-light);transform:translateY(-2px)}
        .cta-btns .btn-outline{border-color:rgba(255,255,255,.35);color:#fff}
        .cta-btns .btn-outline:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.12)}
        .site-footer{background:#fff;border-top:1px solid var(--color-border);padding:64px 0 0}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--color-border)}
        .footer-brand .brand{margin-bottom:18px}
        .footer-brand p{font-size:14px;color:var(--color-text-light);line-height:1.8;max-width:300px}
        .footer-col h4{font-size:15px;font-weight:600;color:var(--color-text);margin-bottom:18px}
        .footer-col ul li{margin-bottom:10px;font-size:14px;color:var(--color-text-light)}
        .footer-col ul a{transition:color .2s,transform .2s;display:inline-flex;align-items:center;gap:6px}
        .footer-col ul a:hover{color:var(--color-primary);transform:translateX(3px)}
        .footer-col ul li i{width:18px;color:var(--color-primary);font-size:13px}
        .footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:22px 0;font-size:13px;color:var(--color-text-lighter)}
        .footer-bottom span:last-child{font-weight:500;color:var(--color-text-light)}
        @media (max-width:1024px){
            .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:28px}
            .article-content-col{padding:30px}
            .related-grid{grid-template-columns:repeat(2,1fr)}
            .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
            .footer-brand{grid-column:1/-1}
        }
        @media (max-width:860px){
            .main-nav{display:none}
            .header-actions .search-box{display:flex;flex:1;max-width:220px}
            .header-actions .btn{display:none}
            .nav-toggle{display:flex}
            .article-layout{grid-template-columns:1fr}
            .article-sidebar{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
            .side-ad{grid-column:1/-1}
        }
        @media (max-width:640px){
            :root{--space-section:52px}
            .header-actions .search-box input{width:44px;padding:0 0 0 34px;border-radius:22px;background:transparent;border-color:transparent}
            .header-actions .search-box input:focus{width:160px;padding:0 14px 0 34px;background:#fff;border-color:var(--color-primary)}
            .header-actions .search-box kbd{display:none}
            .article-wrap{padding-top:52px}
            .article-content-col{border-radius:var(--radius-md);padding:24px 20px}
            .article-content{font-size:15.5px}
            .article-hero{padding:40px 0}
            .article-meta{gap:6px}
            .meta-item{font-size:12.5px;padding:5px 10px}
            .related-grid{grid-template-columns:1fr}
            .article-sidebar{grid-template-columns:1fr}
            .footer-grid{grid-template-columns:1fr;gap:28px}
            .footer-brand{grid-column:auto}
            .cta-section{padding:56px 0}
            .cta-btns .btn{flex:1;max-width:220px}
        }
        @media (max-width:520px){
            .header-inner{gap:10px}
            .brand-text{font-size:17px}
            .brand-logo{width:34px;height:34px;font-size:16px}
            .header-actions .search-box{display:none}
            .hero-actions .btn{width:100%}
            .breadcrumb .current{max-width:160px}
        }

/* roulang page: category2 */
/* ==============================
       设计变量
    ============================== */
    :root {
        --primary: #2563eb;
        --primary-dark: #1d4ed8;
        --primary-light: #eff6ff;
        --primary-lighter: #dbeafe;
        --accent: #06b6d4;
        --accent-light: #cffafe;
        --bg: #f8fafc;
        --surface: #ffffff;
        --text: #0f172a;
        --muted: #64748b;
        --border: #e2e8f0;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
        --spacing: 80px;
        --transition: 0.3s ease;
        --max-width: 1200px;
        --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    /* ==============================
       基础 Reset
    ============================== */
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary); }
    button { font-family: inherit; border: none; background: none; cursor: pointer; }
    input, select, textarea { font-family: inherit; font-size: 1rem; }

    /* ==============================
       容器
    ============================== */
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ==============================
       导航
    ============================== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
        transition: box-shadow var(--transition);
    }
    .site-header.scrolled {
        box-shadow: var(--shadow);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        height: 72px;
    }
    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .brand-logo {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 16px;
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
    }
    .brand-text {
        font-size: 20px;
        font-weight: 700;
        color: var(--text);
        letter-spacing: -0.5px;
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .main-nav a {
        padding: 8px 16px;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 500;
        color: var(--muted);
        transition: all var(--transition);
    }
    .main-nav a:hover {
        color: var(--primary);
        background: var(--primary-light);
    }
    .main-nav a.active {
        color: var(--primary);
        background: var(--primary-light);
        font-weight: 600;
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 14px;
    }
    .search-box {
        display: flex;
        align-items: center;
        gap: 10px;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: 10px;
        padding: 8px 14px;
        width: 220px;
        transition: all var(--transition);
    }
    .search-box:focus-within {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        background: var(--surface);
    }
    .search-box i {
        color: var(--muted);
        font-size: 14px;
    }
    .search-box input {
        border: none;
        outline: none;
        background: transparent;
        font-size: 14px;
        color: var(--text);
        flex: 1;
        min-width: 0;
    }
    .search-box input::placeholder {
        color: #94a3b8;
    }
    .search-box kbd {
        background: #f1f5f9;
        border: 1px solid var(--border);
        border-radius: 4px;
        padding: 2px 6px;
        font-size: 11px;
        color: var(--muted);
        white-space: nowrap;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 10px;
        font-size: 15px;
        font-weight: 600;
        padding: 10px 22px;
        transition: all var(--transition);
        border: 1px solid transparent;
        cursor: pointer;
        line-height: 1.4;
    }
    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }
    .btn-primary:hover {
        background: var(--primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
    }
    .btn-primary:active {
        transform: translateY(0);
    }
    .btn-sm {
        padding: 8px 16px;
        font-size: 14px;
    }
    .btn-outline {
        background: transparent;
        border-color: rgba(255, 255, 255, 0.4);
        color: #fff;
    }
    .btn-outline:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: rgba(255, 255, 255, 0.6);
        color: #fff;
    }
    .btn-lg {
        padding: 14px 32px;
        font-size: 16px;
        border-radius: 12px;
    }

    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        background: var(--bg);
        border: 1px solid var(--border);
    }
    .nav-toggle span {
        width: 20px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: all 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);
    }

    /* ==============================
       页面 Hero / Banner
    ============================== */
    .page-hero {
        position: relative;
        padding: 80px 0 64px;
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        color: #fff;
        isolation: isolate;
    }
    .page-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(37, 99, 235, 0.55) 100%);
        z-index: -1;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
        margin-bottom: 28px;
    }
    .breadcrumb a {
        color: rgba(255, 255, 255, 0.75);
    }
    .breadcrumb a:hover {
        color: #fff;
    }
    .breadcrumb i {
        font-size: 12px;
        color: rgba(255, 255, 255, 0.45);
    }
    .page-hero-content {
        max-width: 720px;
    }
    .page-hero-content h1 {
        font-size: 46px;
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: -0.02em;
        margin-bottom: 16px;
    }
    .page-hero-content h1 span {
        color: #7dd3fc;
    }
    .page-hero-content p {
        font-size: 17px;
        color: rgba(255, 255, 255, 0.9);
        line-height: 1.7;
        margin-bottom: 24px;
    }
    .hero-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }
    .hero-meta span {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: 999px;
        padding: 6px 16px;
        font-size: 14px;
        font-weight: 500;
        backdrop-filter: blur(4px);
    }
    .hero-meta i {
        color: #7dd3fc;
    }

    /* ==============================
       通用板块
    ============================== */
    .section {
        padding: var(--spacing) 0;
    }
    .section-alt {
        background: var(--surface);
    }
    .section-dark {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        color: #fff;
    }
    .section-head {
        text-align: center;
        max-width: 680px;
        margin: 0 auto 48px;
    }
    .section-head .section-tag {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        padding: 5px 14px;
        border-radius: 999px;
        margin-bottom: 14px;
        letter-spacing: 0.05em;
    }
    .section-head h2 {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: -0.02em;
        margin-bottom: 12px;
    }
    .section-head p {
        color: var(--muted);
        font-size: 16px;
        line-height: 1.7;
    }

    /* ==============================
       快速上手步骤
    ============================== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .step-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 32px 24px;
        position: relative;
        transition: all var(--transition);
    }
    .step-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-lighter);
    }
    .step-num {
        font-size: 42px;
        font-weight: 800;
        color: var(--primary-lighter);
        line-height: 1;
        margin-bottom: 12px;
        display: block;
    }
    .step-icon {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        margin-bottom: 18px;
    }
    .step-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .step-card p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.6;
        margin-bottom: 14px;
    }
    .step-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .step-link i {
        transition: transform var(--transition);
    }
    .step-link:hover i {
        transform: translateX(4px);
    }

    /* ==============================
       核心操作指南卡片
    ============================== */
    .guide-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .guide-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .guide-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .guide-card-img {
        position: relative;
        aspect-ratio: 16 / 9;
        overflow: hidden;
    }
    .guide-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .guide-card:hover .guide-card-img img {
        transform: scale(1.05);
    }
    .guide-card-img::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 23, 42, 0.3) 0%, transparent 60%);
    }
    .guide-card-tag {
        position: absolute;
        top: 14px;
        left: 14px;
        background: rgba(255, 255, 255, 0.92);
        color: var(--primary);
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
        z-index: 2;
        backdrop-filter: blur(4px);
    }
    .guide-card-body {
        padding: 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .guide-card-body h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .guide-card-body p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.6;
        flex: 1;
        margin-bottom: 16px;
    }
    .guide-card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 14px;
        border-top: 1px solid var(--border);
    }
    .guide-card-meta .tags {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
    }
    .tag {
        display: inline-block;
        background: var(--bg);
        border: 1px solid var(--border);
        color: var(--muted);
        font-size: 12px;
        padding: 3px 10px;
        border-radius: 999px;
        transition: all var(--transition);
    }
    .tag:hover {
        background: var(--primary-light);
        color: var(--primary);
        border-color: var(--primary-lighter);
    }
    .guide-card-link {
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 4px;
        white-space: nowrap;
    }
    .guide-card-link i {
        font-size: 12px;
        transition: transform var(--transition);
    }
    .guide-card-link:hover i {
        transform: translateX(3px);
    }

    /* ==============================
       流程时间线
    ============================== */
    .process-section .section-head {
        margin-bottom: 56px;
    }
    .timeline {
        position: relative;
        max-width: 820px;
        margin: 0 auto;
        padding-left: 0;
        list-style: none;
    }
    .timeline::before {
        content: "";
        position: absolute;
        left: 27px;
        top: 8px;
        bottom: 8px;
        width: 2px;
        background: linear-gradient(to bottom, var(--primary), var(--accent), transparent);
        border-radius: 2px;
    }
    .timeline-item {
        position: relative;
        padding-left: 76px;
        padding-bottom: 36px;
    }
    .timeline-item:last-child {
        padding-bottom: 0;
    }
    .timeline-dot {
        position: absolute;
        left: 10px;
        top: 4px;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--surface);
        border: 2px solid var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 14px;
        box-shadow: 0 0 0 4px var(--primary-light);
        z-index: 1;
    }
    .timeline-item:nth-child(even) .timeline-dot {
        border-color: var(--accent);
        color: var(--accent);
        box-shadow: 0 0 0 4px var(--accent-light);
    }
    .timeline-content {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 24px 28px;
        transition: box-shadow var(--transition);
    }
    .timeline-content:hover {
        box-shadow: var(--shadow);
    }
    .timeline-content h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 6px;
    }
    .timeline-content p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.6;
    }
    .timeline-duration {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-light);
        border-radius: 999px;
        padding: 3px 12px;
        margin-bottom: 10px;
    }

    /* ==============================
       热门技巧
    ============================== */
    .tips-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .tip-card {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: var(--radius);
        padding: 28px;
        display: flex;
        gap: 20px;
        transition: all var(--transition);
    }
    .tip-card:hover {
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.2);
        transform: translateY(-3px);
    }
    .tip-rank {
        font-size: 28px;
        font-weight: 800;
        color: rgba(255, 255, 255, 0.15);
        line-height: 1;
        min-width: 40px;
    }
    .tip-body {
        flex: 1;
    }
    .tip-body h3 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 6px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .tip-body h3 i {
        color: #f59e0b;
        font-size: 14px;
    }
    .tip-body p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.65);
        line-height: 1.6;
    }

    /* ==============================
       FAQ
    ============================== */
    .faq-list {
        max-width: 780px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        margin-bottom: 14px;
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover {
        border-color: var(--primary-lighter);
    }
    .faq-item.active {
        border-color: var(--primary);
        box-shadow: var(--shadow);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 22px 24px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        transition: color var(--transition);
    }
    .faq-question:hover {
        color: var(--primary);
    }
    .faq-question .faq-icon {
        flex-shrink: 0;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        transition: all var(--transition);
    }
    .faq-item.active .faq-icon {
        background: var(--primary);
        color: #fff;
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }
    .faq-item.active .faq-answer {
        max-height: 500px;
    }
    .faq-answer-inner {
        padding: 0 24px 24px;
        font-size: 15px;
        color: var(--muted);
        line-height: 1.75;
        border-top: 1px solid var(--border);
        padding-top: 16px;
        margin-top: 0;
    }
    .faq-answer-inner a {
        color: var(--primary);
        font-weight: 500;
    }

    /* ==============================
       CTA
    ============================== */
    .cta-section {
        position: relative;
        padding: 90px 0;
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        text-align: center;
        color: #fff;
        isolation: isolate;
    }
    .cta-section::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(37, 99, 235, 0.6) 100%);
        z-index: -1;
    }
    .cta-inner {
        max-width: 640px;
        margin: 0 auto;
    }
    .cta-inner h2 {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.3;
        margin-bottom: 14px;
    }
    .cta-inner p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.85);
        margin-bottom: 32px;
    }
    .cta-buttons {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* ==============================
       页脚
    ============================== */
    .site-footer {
        background: #0f172a;
        color: #94a3b8;
        padding: 64px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .brand {
        margin-bottom: 16px;
    }
    .footer-brand .brand-text {
        color: #fff;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 320px;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 18px;
    }
    .footer-col ul {
        list-style: none;
    }
    .footer-col ul li {
        margin-bottom: 12px;
    }
    .footer-col ul a {
        color: #94a3b8;
        font-size: 14px;
        transition: all var(--transition);
    }
    .footer-col ul a:hover {
        color: #fff;
        padding-left: 4px;
    }
    .footer-col ul li i {
        margin-right: 8px;
        color: #64748b;
        width: 16px;
        text-align: center;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 24px 0;
        font-size: 13px;
        color: #64748b;
        flex-wrap: wrap;
        gap: 12px;
    }

    /* ==============================
       响应式
    ============================== */
    @media (max-width: 1024px) {
        :root { --spacing: 64px; }
        .steps-grid { grid-template-columns: repeat(2, 1fr); }
        .guide-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .search-box { width: 170px; }
    }

    @media (max-width: 900px) {
        .header-inner { flex-wrap: wrap; height: auto; padding: 14px 0; }
        .nav-toggle { display: flex; }
        .main-nav {
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--surface);
            flex-direction: column;
            align-items: flex-start;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
            transform: translateY(-120%);
            transition: transform 0.35s ease;
            z-index: 999;
            opacity: 0;
            pointer-events: none;
        }
        .main-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .main-nav a {
            width: 100%;
            padding: 12px 16px;
            font-size: 16px;
        }
        .header-actions {
            position: fixed;
            top: 0;
            right: 0;
            left: 0;
            background: var(--surface);
            padding: 70px 24px 24px;
            flex-direction: column;
            align-items: stretch;
            transform: translateY(-120%);
            transition: transform 0.35s ease;
            z-index: 998;
            opacity: 0;
            pointer-events: none;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .header-actions.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .search-box { width: 100%; }
        .header-actions .btn { width: 100%; }
        .page-hero-content h1 { font-size: 34px; }
        .page-hero-content p { font-size: 16px; }
    }

    @media (max-width: 768px) {
        .steps-grid { grid-template-columns: 1fr; }
        .guide-grid { grid-template-columns: 1fr; }
        .tips-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        .section { --spacing: 56px; }
        .section-head h2 { font-size: 26px; }
        .page-hero { padding: 56px 0 44px; }
        .page-hero-content h1 { font-size: 30px; }
        .hero-meta { flex-direction: column; gap: 10px; }
        .timeline { padding-left: 0; }
        .timeline::before { left: 15px; }
        .timeline-item { padding-left: 52px; }
        .timeline-dot { left: 0; width: 30px; height: 30px; font-size: 12px; }
        .cta-inner h2 { font-size: 26px; }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
            justify-content: center;
        }
    }

    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .brand-text { font-size: 17px; }
        .guide-card-body { padding: 18px; }
        .guide-card-body h3 { font-size: 16px; }
        .timeline-content { padding: 18px; }
        .step-card { padding: 24px 18px; }
        .cta-buttons { flex-direction: column; align-items: center; }
        .cta-buttons .btn { width: 100%; max-width: 240px; }
    }