/* roulang page: index */
:root {
    --clr-primary: #6c5ce7;
    --clr-primary-dark: #5a4bd1;
    --clr-primary-light: #a29bfe;
    --clr-secondary: #fd79a8;
    --clr-accent: #00cec9;
    --clr-bg: #f8f9fc;
    --clr-surface: #ffffff;
    --clr-text: #1a1a2e;
    --clr-text-secondary: #5a5a7a;
    --clr-text-light: #8e8ea0;
    --clr-border: #e8e8f0;
    --clr-success: #00b894;
    --clr-warning: #fdcb6e;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
    --shadow-md: 0 8px 28px rgba(108, 92, 231, 0.12);
    --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.16);
    --shadow-xl: 0 32px 80px rgba(108, 92, 231, 0.2);
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--clr-text);
    background: var(--clr-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-primary-dark); }
a:focus-visible { outline: 3px solid var(--clr-primary-light); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
button:focus-visible { outline: 3px solid var(--clr-primary-light); outline-offset: 2px; border-radius: 6px; }
input, textarea { font-family: inherit; font-size: inherit; }

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

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

.section-padding { padding: var(--space-2xl) 0; }
.section-padding-top { padding-top: var(--space-2xl); }
.section-padding-bottom { padding-bottom: var(--space-2xl); }

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--clr-text);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--clr-text-secondary);
    max-width: 600px;
    line-height: 1.6;
}

.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

.section-header {
    margin-bottom: var(--space-xl);
}

/* ===== header / nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--clr-border);
    transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
    background: rgba(255,255,255,0.96);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(108,92,231,0.3);
}

.logo-text {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--clr-text);
    letter-spacing: -0.02em;
    line-height: 1;
}

.logo-text span { color: var(--clr-primary); }

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-main a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--clr-text-secondary);
    padding: var(--space-xs) 0;
    position: relative;
    transition: color var(--transition);
}

.nav-main a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2.5px;
    background: var(--clr-primary);
    border-radius: 4px;
    transition: width var(--transition);
}

.nav-main a:hover { color: var(--clr-text); }
.nav-main a:hover::after { width: 100%; }
.nav-main a.active { color: var(--clr-primary); font-weight: 600; }
.nav-main a.active::after { width: 100%; }

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--clr-bg);
    border-radius: 50px;
    padding: 0 var(--space-md);
    border: 1px solid var(--clr-border);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
    border-color: var(--clr-primary-light);
    box-shadow: 0 0 0 4px rgba(108,92,231,0.08);
}

.search-box input {
    border: none;
    background: transparent;
    padding: 8px 6px;
    font-size: 0.9rem;
    color: var(--clr-text);
    width: 160px;
    outline: none;
}

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

.search-box button {
    color: var(--clr-text-light);
    font-size: 0.95rem;
    padding: 4px;
    transition: color var(--transition);
}

.search-box button:hover { color: var(--clr-primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 10px 24px;
    border-radius: 50px;
    transition: all var(--transition);
    white-space: nowrap;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--clr-primary), #8b7cf7);
    color: #fff;
    box-shadow: 0 4px 16px rgba(108,92,231,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(108,92,231,0.4);
    color: #fff;
}

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

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

.btn-outline:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
    background: rgba(108,92,231,0.04);
}

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

.btn-outline-primary:hover {
    background: var(--clr-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108,92,231,0.25);
}

.btn-lg { padding: 14px 36px; font-size: 1.05rem; }
.btn-sm { padding: 6px 18px; font-size: 0.85rem; }

.mobile-toggle {
    display: none;
    font-size: 1.4rem;
    color: var(--clr-text);
    padding: var(--space-sm);
    cursor: pointer;
}

@media (max-width: 1024px) {
    .search-box input { width: 120px; }
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .nav-main {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--clr-border);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
        box-shadow: var(--shadow-lg);
    }
    .nav-main.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-main a { font-size: 1.1rem; padding: var(--space-sm) 0; width: 100%; }
    .nav-main a::after { bottom: 2px; }
    .header-actions .btn-outline { display: none; }
    .search-box input { width: 100px; }
}

/* ===== hero ===== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    padding-top: 68px;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0c29, #1a1a3e, #24243e);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    opacity: 0.25;
    mix-blend-mode: overlay;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(108,92,231,0.25), transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(253,121,168,0.15), transparent 70%);
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-content {
    max-width: 760px;
    padding: var(--space-2xl) 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(108,92,231,0.2);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(108,92,231,0.3);
    color: #c4b5fd;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: var(--space-lg);
}

.hero-badge i { font-size: 0.8rem; }

.hero h1 {
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.1;
    color: #ffffff;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
}

.hero h1 span {
    background: linear-gradient(135deg, #a29bfe, #fd79a8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.75);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.hero-actions .btn-primary {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    box-shadow: 0 8px 32px rgba(108,92,231,0.35);
    font-size: 1.05rem;
    padding: 16px 40px;
}

.hero-actions .btn-outline {
    border-color: rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.85);
}

.hero-actions .btn-outline:hover {
    border-color: rgba(255,255,255,0.6);
    color: #fff;
    background: rgba(255,255,255,0.05);
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-stat h3 {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}

.hero-stat p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 0;
}

@media (max-width: 1024px) {
    .hero h1 { font-size: 3rem; }
}

@media (max-width: 768px) {
    .hero { min-height: 70vh; }
    .hero h1 { font-size: 2.4rem; }
    .hero p { font-size: 1rem; }
    .hero-stats { gap: var(--space-lg); }
    .hero-stat h3 { font-size: 1.6rem; }
}

@media (max-width: 520px) {
    .hero h1 { font-size: 1.9rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { width: 100%; text-align: center; }
}

/* ===== intro ===== */
.intro-section {
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.intro-text h2 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: var(--space-md);
    color: var(--clr-text);
}

.intro-text p {
    color: var(--clr-text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.intro-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.intro-feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--clr-bg);
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.intro-feature-item i {
    font-size: 1.4rem;
    color: var(--clr-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.intro-feature-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.intro-feature-item p {
    font-size: 0.85rem;
    color: var(--clr-text-light);
    margin-bottom: 0;
}

.intro-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.intro-image:hover img { transform: scale(1.03); }

.intro-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.2), transparent);
}

@media (max-width: 1024px) {
    .intro-grid { gap: var(--space-xl); }
    .intro-features { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .intro-grid { grid-template-columns: 1fr; }
    .intro-image { order: -1; }
    .intro-image img { height: 280px; }
    .intro-text h2 { font-size: 1.8rem; }
}

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

.categories-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.category-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--clr-surface);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid var(--clr-border);
}

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

.category-card-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}

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

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

.category-card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.15), transparent);
}

.category-card-body {
    padding: var(--space-lg);
}

.category-card-body h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--clr-text);
}

.category-card-body p {
    color: var(--clr-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.category-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.85rem;
    color: var(--clr-text-light);
}

.category-card-meta i { margin-right: 4px; }

.category-card .btn {
    margin-top: var(--space-md);
}

@media (max-width: 768px) {
    .categories-grid { grid-template-columns: 1fr; }
    .category-card-image { height: 180px; }
}

/* ===== latest posts ===== */
.latest-section {
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
}

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

.post-card {
    background: var(--clr-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-border);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--clr-primary-light);
}

.post-card-image {
    height: 180px;
    overflow: hidden;
    position: relative;
}

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

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

.post-card-image .post-category {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    background: rgba(108,92,231,0.9);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
    z-index: 1;
}

.post-card-body {
    padding: var(--space-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.post-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
    color: var(--clr-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-body h3 a {
    color: var(--clr-text);
}

.post-card-body h3 a:hover { color: var(--clr-primary); }

.post-card-body p {
    font-size: 0.9rem;
    color: var(--clr-text-secondary);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.post-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--clr-text-light);
    padding-top: var(--space-md);
    border-top: 1px solid var(--clr-border);
}

.post-card-footer .post-date i { margin-right: 4px; }

.empty-posts {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--clr-text-light);
    background: var(--clr-bg);
    border-radius: var(--radius-md);
    border: 1px dashed var(--clr-border);
}

.empty-posts i {
    font-size: 2.4rem;
    color: var(--clr-text-light);
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-posts p {
    font-size: 1rem;
}

@media (max-width: 1024px) {
    .posts-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .posts-grid { grid-template-columns: 1fr; }
    .post-card-image { height: 200px; }
}

/* ===== stats ===== */
.stats-section {
    background: linear-gradient(135deg, #1a1a3e, #2d1b4e);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    opacity: 0.08;
    z-index: 0;
}

.stats-section .container { position: relative; z-index: 1; }

.stats-section .section-title { color: #ffffff; }
.stats-section .section-subtitle { color: rgba(255,255,255,0.6); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.stat-item {
    text-align: center;
    padding: var(--space-lg);
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.08);
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}

.stat-item:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, #a29bfe, #fd79a8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.6);
    font-weight: 500;
}

@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
    .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
    .stat-number { font-size: 2rem; }
    .stat-item { padding: var(--space-md); }
}

/* ===== featured content ===== */
.featured-section {
    background: var(--clr-bg);
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.featured-card {
    display: flex;
    flex-direction: column;
    background: var(--clr-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--clr-border);
    transition: all var(--transition);
}

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

.featured-card-image {
    height: 240px;
    overflow: hidden;
    position: relative;
}

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

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

.featured-card-image .featured-tag {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: rgba(253,121,168,0.9);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 50px;
    z-index: 1;
}

.featured-card-body {
    padding: var(--space-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.featured-card-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--clr-text);
}

.featured-card-body p {
    font-size: 0.92rem;
    color: var(--clr-text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: var(--space-md);
}

.featured-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--clr-border);
}

.featured-card-footer .author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--clr-text-light);
}

.featured-card-footer .author i {
    font-size: 1.2rem;
    color: var(--clr-primary-light);
}

@media (max-width: 1024px) {
    .featured-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .featured-card-image { height: 200px; }
}

/* ===== faq ===== */
.faq-section {
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    cursor: pointer;
    font-weight: 600;
    font-size: 1.02rem;
    color: var(--clr-text);
    gap: var(--space-md);
    user-select: none;
    transition: color var(--transition);
}

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

.faq-question i {
    font-size: 1.1rem;
    color: var(--clr-primary-light);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.faq-item.open .faq-question i { transform: rotate(180deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 var(--space-lg);
}

.faq-item.open .faq-answer {
    max-height: 200px;
    padding: 0 var(--space-lg) var(--space-lg);
}

.faq-answer p {
    color: var(--clr-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

@media (max-width: 640px) {
    .faq-question { padding: var(--space-md); font-size: 0.95rem; }
    .faq-item.open .faq-answer { padding: 0 var(--space-md) var(--space-md); }
}

/* ===== cta ===== */
.cta-section {
    background: linear-gradient(135deg, #6c5ce7, #8b7cf7);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
    opacity: 0.08;
    z-index: 0;
}

.cta-section .container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
}

.cta-section h2 {
    font-size: 2.6rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.cta-section p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.8);
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}

.cta-actions .btn-white {
    background: #ffffff;
    color: var(--clr-primary);
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.cta-actions .btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    color: var(--clr-primary-dark);
}

.cta-actions .btn-outline-white {
    border-color: rgba(255,255,255,0.4);
    color: #fff;
    background: transparent;
}

.cta-actions .btn-outline-white:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
    color: #fff;
}

@media (max-width: 768px) {
    .cta-section h2 { font-size: 2rem; }
    .cta-section p { font-size: 1rem; }
}

/* ===== footer ===== */
.site-footer {
    background: #12122a;
    color: rgba(255,255,255,0.7);
    padding: var(--space-2xl) 0 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-text span { color: #a29bfe; }

.footer-brand p {
    margin-top: var(--space-md);
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    max-width: 300px;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    font-size: 1.1rem;
    transition: all var(--transition);
    border: 1px solid rgba(255,255,255,0.06);
}

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

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-col ul a {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-col ul a:hover { color: #a29bfe; }

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    gap: var(--space-md);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.35);
}

.footer-bottom a {
    color: rgba(255,255,255,0.4);
}

.footer-bottom a:hover { color: #a29bfe; }

@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
}

@media (max-width: 640px) {
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-brand p { max-width: 100%; }
    .footer-social { justify-content: center; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== back to top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--clr-primary);
    color: #fff;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(108,92,231,0.3);
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: all var(--transition);
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--clr-primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(108,92,231,0.4);
    color: #fff;
}

@media (max-width: 640px) {
    .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1rem; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #6C5CE7;
        --primary-dark: #5A4BD1;
        --primary-light: #A29BFE;
        --primary-bg: #F4F2FF;
        --secondary: #00CEC9;
        --secondary-dark: #00B5B0;
        --accent: #FD79A8;
        --bg: #FFFFFF;
        --bg-alt: #F8F9FC;
        --bg-card: #FFFFFF;
        --text: #1E1E2F;
        --text-light: #6B7280;
        --text-muted: #9CA3AF;
        --border: #E5E7EB;
        --border-light: #F0F0F5;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-xs: 6px;
        --shadow: 0 4px 24px rgba(108, 92, 231, 0.08);
        --shadow-hover: 0 12px 40px rgba(108, 92, 231, 0.15);
        --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.12);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
    }

    /* ===== Reset / Base ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
    }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        padding-top: var(--header-h);
    }
    a {
        color: var(--primary);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--primary-dark);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }
    ul,
    ol {
        list-style: none;
    }
    button,
    input {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
        background: none;
    }
    button {
        cursor: pointer;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 导航 ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-light);
        height: var(--header-h);
        transition: var(--transition);
    }
    .site-header.scrolled {
        box-shadow: 0 2px 40px rgba(0, 0, 0, 0.06);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-h);
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 800;
        font-size: 22px;
        color: var(--text);
        text-decoration: none;
        flex-shrink: 0;
    }
    .logo .logo-icon {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 18px;
        font-weight: 700;
    }
    .logo-text span {
        color: var(--primary);
    }
    .nav-main {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .nav-main a {
        padding: 8px 18px;
        border-radius: var(--radius-xs);
        font-size: 15px;
        font-weight: 500;
        color: var(--text-light);
        text-decoration: none;
        transition: var(--transition);
        position: relative;
    }
    .nav-main a:hover {
        color: var(--primary);
        background: var(--primary-bg);
    }
    .nav-main a.active {
        color: var(--primary);
        background: var(--primary-bg);
        font-weight: 600;
    }
    .nav-main a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--primary);
        border-radius: 4px;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }
    .nav-actions .search-toggle {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-light);
        font-size: 18px;
        transition: var(--transition);
        background: transparent;
    }
    .nav-actions .search-toggle:hover {
        background: var(--bg-alt);
        color: var(--primary);
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: 50px;
        font-weight: 600;
        font-size: 14px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff !important;
        border: none;
        transition: var(--transition);
        box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25);
        text-decoration: none;
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(108, 92, 231, 0.35);
        color: #fff;
    }
    .btn-primary i {
        font-size: 14px;
    }
    .btn-outline {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 20px;
        border-radius: 50px;
        font-weight: 500;
        font-size: 14px;
        color: var(--text-light);
        border: 1.5px solid var(--border);
        background: transparent;
        transition: var(--transition);
        text-decoration: none;
    }
    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: var(--primary-bg);
    }
    .mobile-toggle {
        display: none;
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--text);
        background: transparent;
        border-radius: var(--radius-xs);
        transition: var(--transition);
    }
    .mobile-toggle:hover {
        background: var(--bg-alt);
    }

    /* ===== 文章 Banner ===== */
    .article-banner {
        position: relative;
        padding: 60px 0 40px;
        background: var(--bg-alt);
        border-bottom: 1px solid var(--border-light);
    }
    .article-banner .container {
        position: relative;
        z-index: 2;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 20px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a {
        color: var(--text-muted);
        text-decoration: none;
    }
    .article-breadcrumb a:hover {
        color: var(--primary);
    }
    .article-breadcrumb .sep {
        color: var(--border);
    }
    .article-breadcrumb .current {
        color: var(--text-light);
        font-weight: 500;
    }
    .article-category-badge {
        display: inline-block;
        padding: 4px 16px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-bg);
        margin-bottom: 16px;
    }
    .article-title {
        font-size: 36px;
        font-weight: 800;
        line-height: 1.25;
        color: var(--text);
        max-width: 900px;
        margin-bottom: 16px;
    }
    .article-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        font-size: 14px;
        color: var(--text-muted);
        flex-wrap: wrap;
    }
    .article-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta i {
        font-size: 14px;
        color: var(--primary-light);
    }

    /* ===== 文章主内容 ===== */
    .article-main {
        padding: 48px 0 60px;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
    }
    .article-content {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text);
    }
    .article-content h2 {
        font-size: 26px;
        font-weight: 700;
        margin: 40px 0 16px;
        color: var(--text);
    }
    .article-content h3 {
        font-size: 20px;
        font-weight: 600;
        margin: 32px 0 12px;
        color: var(--text);
    }
    .article-content p {
        margin-bottom: 20px;
    }
    .article-content ul,
    .article-content ol {
        margin: 16px 0 24px;
        padding-left: 24px;
    }
    .article-content ul li {
        list-style: disc;
        margin-bottom: 8px;
    }
    .article-content ol li {
        list-style: decimal;
        margin-bottom: 8px;
    }
    .article-content img {
        border-radius: var(--radius);
        margin: 24px 0;
        box-shadow: var(--shadow);
    }
    .article-content blockquote {
        border-left: 4px solid var(--primary);
        padding: 16px 24px;
        margin: 24px 0;
        background: var(--primary-bg);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-content a {
        color: var(--primary);
        text-decoration: underline;
        text-underline-offset: 2px;
    }
    .article-content a:hover {
        color: var(--primary-dark);
    }
    .article-content code {
        background: var(--bg-alt);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 14px;
        color: var(--accent);
    }
    .article-content pre {
        background: #1E1E2F;
        color: #e4e4ef;
        padding: 20px 24px;
        border-radius: var(--radius);
        overflow-x: auto;
        margin: 24px 0;
        font-size: 14px;
        line-height: 1.6;
    }
    .article-content .cms-safe-html table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 15px;
    }
    .article-content .cms-safe-html th,
    .article-content .cms-safe-html td {
        padding: 12px 16px;
        border: 1px solid var(--border);
        text-align: left;
    }
    .article-content .cms-safe-html th {
        background: var(--bg-alt);
        font-weight: 600;
        color: var(--text);
    }

    /* ===== 侧边栏 ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-widget {
        background: var(--bg-card);
        border: 1px solid var(--border-light);
        border-radius: var(--radius);
        padding: 24px;
        box-shadow: var(--shadow);
    }
    .sidebar-widget h4 {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 16px;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-widget h4 i {
        color: var(--primary);
        font-size: 18px;
    }
    .sidebar-list li {
        padding: 10px 0;
        border-bottom: 1px solid var(--border-light);
    }
    .sidebar-list li:last-child {
        border-bottom: none;
    }
    .sidebar-list a {
        color: var(--text-light);
        font-size: 14px;
        font-weight: 500;
        display: block;
        transition: var(--transition);
    }
    .sidebar-list a:hover {
        color: var(--primary);
        padding-left: 4px;
    }
    .sidebar-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .sidebar-tags a {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-light);
        background: var(--bg-alt);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        text-decoration: none;
    }
    .sidebar-tags a:hover {
        background: var(--primary-bg);
        color: var(--primary);
        border-color: var(--primary-light);
    }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary-bg), #E8F8F5);
        border: 1px solid rgba(108, 92, 231, 0.15);
    }
    .sidebar-cta h4 {
        color: var(--primary-dark);
    }
    .sidebar-cta p {
        font-size: 14px;
        color: var(--text-light);
        margin-bottom: 16px;
    }
    .sidebar-cta .btn-primary {
        width: 100%;
        justify-content: center;
    }

    /* ===== 相关文章 ===== */
    .related-section {
        padding: 48px 0 60px;
        background: var(--bg-alt);
        border-top: 1px solid var(--border-light);
    }
    .related-section .section-title {
        font-size: 24px;
        font-weight: 700;
        margin-bottom: 32px;
        text-align: center;
        color: var(--text);
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        border: 1px solid var(--border-light);
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
    }
    .related-card img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: 0;
    }
    .related-card .card-body {
        padding: 20px;
    }
    .related-card .card-body h3 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .related-card .card-body h3 a {
        color: var(--text);
        text-decoration: none;
    }
    .related-card .card-body h3 a:hover {
        color: var(--primary);
    }
    .related-card .card-body p {
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .related-card .card-meta {
        font-size: 12px;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 12px;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: #1E1E2F;
        color: rgba(255, 255, 255, 0.75);
        padding: 60px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.8fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .logo {
        margin-bottom: 16px;
        color: #fff;
    }
    .footer-brand .logo .logo-text span {
        color: var(--primary-light);
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        color: rgba(255, 255, 255, 0.55);
        margin-bottom: 20px;
        max-width: 320px;
    }
    .footer-social {
        display: flex;
        gap: 12px;
    }
    .footer-social a {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.06);
        display: flex;
        align-items: center;
        justify-content: center;
        color: rgba(255, 255, 255, 0.5);
        font-size: 18px;
        transition: var(--transition);
        text-decoration: none;
    }
    .footer-social a:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.5);
        text-decoration: none;
        transition: var(--transition);
    }
    .footer-col ul li a:hover {
        color: #fff;
        padding-left: 4px;
    }
    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.35);
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom a {
        color: rgba(255, 255, 255, 0.5);
        text-decoration: none;
    }
    .footer-bottom a:hover {
        color: #fff;
    }

    /* ===== 错误状态 ===== */
    .error-state {
        text-align: center;
        padding: 80px 20px;
    }
    .error-state i {
        font-size: 64px;
        color: var(--text-muted);
        margin-bottom: 24px;
    }
    .error-state h2 {
        font-size: 28px;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--text);
    }
    .error-state p {
        color: var(--text-light);
        margin-bottom: 24px;
        font-size: 16px;
    }
    .error-state .btn-primary {
        display: inline-flex;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .article-layout {
            grid-template-columns: 1fr;
        }
        .article-sidebar {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .related-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
    }
    @media (max-width: 768px) {
        .nav-main {
            display: none;
            position: absolute;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            gap: 4px;
        }
        .nav-main.open {
            display: flex;
        }
        .nav-main a {
            padding: 12px 16px;
            width: 100%;
            border-radius: var(--radius-sm);
        }
        .nav-main a.active::after {
            display: none;
        }
        .nav-main a.active {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-toggle {
            display: flex;
        }
        .nav-actions .btn-outline {
            display: none;
        }
        .article-title {
            font-size: 26px;
        }
        .article-banner {
            padding: 40px 0 28px;
        }
        .article-meta {
            gap: 12px;
            font-size: 13px;
        }
        .article-sidebar {
            grid-template-columns: 1fr;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }
    @media (max-width: 520px) {
        .header-inner {
            padding: 0 16px;
        }
        .logo {
            font-size: 18px;
        }
        .logo .logo-icon {
            width: 30px;
            height: 30px;
            font-size: 14px;
        }
        .nav-actions .search-toggle {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }
        .btn-primary {
            padding: 8px 16px;
            font-size: 13px;
        }
        .btn-primary i {
            font-size: 12px;
        }
        .article-title {
            font-size: 22px;
        }
        .article-content {
            font-size: 15px;
        }
        .article-content h2 {
            font-size: 20px;
        }
        .article-content h3 {
            font-size: 17px;
        }
        .container {
            padding: 0 16px;
        }
        .sidebar-widget {
            padding: 16px;
        }
        .related-card img {
            height: 140px;
        }
    }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C5CE7;
            --primary-light: #A29BFE;
            --primary-dark: #4834D4;
            --secondary: #FD79A8;
            --accent: #FDCB6E;
            --bg: #0F0B1A;
            --bg-card: #1A1530;
            --bg-elevated: #232040;
            --text: #F0EEF8;
            --text-muted: #9B97B5;
            --text-soft: #C8C4E0;
            --border: #2E2A50;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(108, 92, 231, 0.12);
            --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.25);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.4rem, 6vw, 4.0rem);
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            margin-bottom: 0.5em;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        p {
            margin-bottom: 1em;
            color: var(--text-soft);
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: var(--text-muted);
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            background: var(--primary);
            color: #fff;
            border: 2px solid transparent;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 3px;
        }
        .btn-secondary {
            background: transparent;
            border-color: var(--border);
            color: var(--text);
            box-shadow: none;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary-light);
            box-shadow: none;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn .icon {
            font-size: 1.1em;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(108, 92, 231, 0.18);
            color: var(--primary-light);
            border: 1px solid rgba(108, 92, 231, 0.25);
            letter-spacing: 0.02em;
        }
        .badge-hot {
            background: rgba(253, 121, 168, 0.18);
            color: var(--secondary);
            border-color: rgba(253, 121, 168, 0.3);
        }
        .badge-new {
            background: rgba(108, 92, 231, 0.22);
            color: var(--primary-light);
            border-color: rgba(108, 92, 231, 0.35);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 11, 26, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(46, 42, 80, 0.5);
            height: var(--header-h);
            transition: background var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            text-decoration: none;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
        }
        .logo .logo-text {
            color: var(--text);
        }
        .logo .logo-text span {
            color: var(--primary-light);
        }
        .logo:hover {
            color: var(--text);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: all var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-main a:hover {
            color: var(--text);
            background: rgba(108, 92, 231, 0.08);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-actions .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 6px 16px;
            gap: 8px;
            transition: border var(--transition);
        }
        .nav-actions .search-box:focus-within {
            border-color: var(--primary);
        }
        .nav-actions .search-box input {
            background: none;
            border: none;
            outline: none;
            color: var(--text);
            width: 140px;
            font-size: 0.85rem;
            padding: 4px 0;
        }
        .nav-actions .search-box input::placeholder {
            color: var(--text-muted);
        }
        .nav-actions .search-box .icon {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.6rem;
            padding: 4px;
            cursor: pointer;
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 900px) {
            .nav-main {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(15, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav-toggle {
                display: block;
            }
            .nav-actions .search-box input {
                width: 100px;
            }
            .nav-actions .btn span {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .nav-actions .search-box {
                display: none;
            }
            .header-inner {
                padding: 0 16px;
            }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 120px 0 60px;
            background: linear-gradient(160deg, #1A1530 0%, #0F0B1A 60%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(108, 92, 231, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text) 40%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 28px;
            color: var(--text-soft);
        }
        .page-banner .banner-meta {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .page-banner .banner-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .page-banner .banner-meta .num {
            color: var(--primary-light);
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header .badge {
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            margin-top: 8px;
        }

        /* ===== Resource Categories ===== */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .resource-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .resource-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .resource-card:hover::before {
            opacity: 1;
        }
        .resource-card:hover {
            transform: translateY(-4px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: var(--shadow-hover);
        }
        .resource-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(108, 92, 231, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin-bottom: 18px;
            transition: background var(--transition);
        }
        .resource-card:hover .icon-wrap {
            background: rgba(108, 92, 231, 0.22);
        }
        .resource-card h3 {
            margin-bottom: 8px;
            font-size: 1.2rem;
        }
        .resource-card p {
            font-size: 0.92rem;
            margin-bottom: 16px;
            color: var(--text-muted);
        }
        .resource-card .count {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .resource-card .count .num {
            color: var(--primary-light);
            font-weight: 600;
        }

        /* ===== Featured Resources ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .featured-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .featured-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(108, 92, 231, 0.25);
        }
        .featured-item .thumb {
            aspect-ratio: 16 / 9;
            background: var(--bg-elevated);
            position: relative;
            overflow: hidden;
        }
        .featured-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-item:hover .thumb img {
            transform: scale(1.05);
        }
        .featured-item .thumb .tags {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .featured-item .body {
            padding: 20px 22px 24px;
        }
        .featured-item .body h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .featured-item .body .meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .featured-item .body .meta .downloads {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 16px;
            transition: border var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(108, 92, 231, 0.3);
        }
        .stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text) 30%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            border-color: rgba(108, 92, 231, 0.3);
            transform: translateY(-3px);
        }
        .step-card::before {
            counter-increment: step;
            content: "0" counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(108, 92, 231, 0.08);
            line-height: 1;
        }
        .step-card .icon {
            font-size: 2.2rem;
            color: var(--primary-light);
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.2);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            color: var(--text);
            transition: color var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            color: var(--primary-light);
        }
        .faq-item .answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.7;
        }
        .faq-item .answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(145deg, #1A1530 0%, #0F0B1A 100%), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-box {
            text-align: center;
            padding: 60px 24px;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-box h2 {
            margin-bottom: 12px;
        }
        .cta-box p {
            margin-bottom: 28px;
            font-size: 1.05rem;
        }
        .cta-box .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0A0815;
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 340px;
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-soft);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--text-soft);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section {
                padding: 48px 0;
            }
            .page-banner {
                padding: 100px 0 40px;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            /* 主辅色 */
            --primary: #6C5CE7;
            --primary-light: #A29BFE;
            --primary-dark: #4834D4;
            --secondary: #00CEC9;
            --secondary-light: #81ECEC;
            --accent: #FD79A8;
            --accent-light: #FDCB6E;
            /* 背景 */
            --bg-white: #FFFFFF;
            --bg-light: #F8F9FD;
            --bg-dark: #1E1E2F;
            --bg-card: #FFFFFF;
            --bg-section-alt: #F0F2F8;
            /* 文字 */
            --text-primary: #1A1A2E;
            --text-body: #2D3436;
            --text-secondary: #636E72;
            --text-muted: #B2BEC3;
            --text-inverse: #FFFFFF;
            --text-link: #6C5CE7;
            /* 边框 & 分隔 */
            --border-color: #E2E8F0;
            --border-light: #F0F0F5;
            --divider: #E8E8F0;
            /* 圆角 */
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 50%;
            /* 阴影 */
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 20px 50px rgba(108,92,231,0.15);
            /* 间距 */
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --space-4xl: 80px;
            /* 字体 */
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-lg: 1.125rem;
            --font-size-xl: 1.25rem;
            --font-size-2xl: 1.5rem;
            --font-size-3xl: 2rem;
            --font-size-4xl: 2.5rem;
            --font-size-5xl: 3.25rem;
            --line-height: 1.6;
            --line-height-heading: 1.2;
            /* 布局 */
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: var(--line-height);
            color: var(--text-body);
            background: var(--bg-white);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--text-link);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            line-height: var(--line-height-heading);
            font-weight: 700;
        }
        p {
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ========== Container ========== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 var(--space-md);
            }
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-weight: 800;
            font-size: var(--font-size-2xl);
            color: var(--text-primary);
            text-decoration: none;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: var(--font-size-lg);
            font-weight: 900;
        }
        .logo-text {
            color: var(--text-primary);
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: var(--space-lg);
        }
        .nav-main a {
            position: relative;
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--text-secondary);
            padding: var(--space-sm) 0;
            transition: color 0.25s ease;
            letter-spacing: 0.3px;
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-main a:hover {
            color: var(--primary);
        }
        .nav-main a:hover::after {
            width: 100%;
        }
        .nav-main a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-main a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-md);
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 100px;
            padding: 0 var(--space-md);
            border: 1px solid var(--border-color);
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
        }
        .nav-search input {
            background: transparent;
            padding: 8px 10px;
            font-size: var(--font-size-sm);
            color: var(--text-primary);
            width: 160px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search button {
            color: var(--text-muted);
            font-size: var(--font-size-sm);
            padding: 4px;
            transition: color 0.25s ease;
        }
        .nav-search button:hover {
            color: var(--primary);
        }
        .nav-btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 8px 20px;
            border-radius: 100px;
            font-size: var(--font-size-sm);
            font-weight: 600;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-btn-outline {
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            background: transparent;
        }
        .nav-btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(108,92,231,0.04);
        }
        .nav-btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 12px rgba(108,92,231,0.25);
        }
        .nav-btn-primary:hover {
            box-shadow: 0 8px 24px rgba(108,92,231,0.35);
            transform: translateY(-1px);
            color: #fff;
        }
        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== 移动端导航 ========== */
        @media (max-width: 820px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: var(--space-lg) var(--space-lg);
                gap: var(--space-md);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s ease;
                align-items: stretch;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-main a {
                padding: var(--space-sm) 0;
                font-size: var(--font-size-base);
            }
            .nav-main a::after {
                display: none;
            }
            .nav-main a.active {
                background: rgba(108,92,231,0.06);
                border-radius: var(--radius-sm);
                padding-left: var(--space-sm);
            }
            .nav-actions {
                gap: var(--space-sm);
            }
            .nav-search input {
                width: 100px;
            }
            .nav-btn {
                padding: 6px 14px;
                font-size: 0.75rem;
            }
            .hamburger {
                display: flex;
            }
        }
        @media (max-width: 480px) {
            .nav-search {
                display: none;
            }
            .nav-actions .nav-btn-outline {
                display: none;
            }
            .site-header .container {
                gap: var(--space-sm);
            }
        }

        /* ========== Page Banner ========== */
        .page-banner {
            background: linear-gradient(135deg, #1A1A2E 0%, #2D1B69 40%, #16213E 100%);
            position: relative;
            padding: var(--space-4xl) 0 var(--space-3xl);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-inverse);
            font-size: var(--font-size-4xl);
            font-weight: 800;
            margin-bottom: var(--space-lg);
            letter-spacing: -0.5px;
        }
        .page-banner h1 i {
            color: var(--secondary-light);
            margin-right: 8px;
        }
        .page-banner p {
            color: rgba(255,255,255,0.75);
            font-size: var(--font-size-lg);
            max-width: 680px;
            margin: 0 auto var(--space-xl);
        }
        .page-banner .banner-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: var(--space-md) var(--space-xl);
            color: rgba(255,255,255,0.55);
            font-size: var(--font-size-sm);
        }
        .page-banner .banner-meta span i {
            margin-right: 6px;
            color: var(--secondary-light);
        }
        .banner-wave {
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 60px;
            fill: var(--bg-white);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: var(--space-3xl) 0 var(--space-2xl);
            }
            .page-banner h1 {
                font-size: var(--font-size-2xl);
            }
            .page-banner p {
                font-size: var(--font-size-base);
            }
        }

        /* ========== Section 通用 ========== */
        .section {
            padding: var(--space-4xl) 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-alt-2 {
            background: var(--bg-section-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }
        .section-title h2 {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: var(--space-md);
        }
        .section-title h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-title p {
            max-width: 560px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: var(--font-size-base);
        }
        .section-title .badge-group {
            display: flex;
            justify-content: center;
            gap: var(--space-sm);
            margin-bottom: var(--space-md);
            flex-wrap: wrap;
        }

        /* ========== 徽章 / 标签 ========== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: var(--font-size-xs);
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--bg-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        .badge-primary {
            background: rgba(108,92,231,0.1);
            color: var(--primary);
            border-color: rgba(108,92,231,0.2);
        }
        .badge-secondary {
            background: rgba(0,206,201,0.1);
            color: #00B5B0;
            border-color: rgba(0,206,201,0.2);
        }
        .badge-accent {
            background: rgba(253,121,168,0.1);
            color: #E06080;
            border-color: rgba(253,121,168,0.2);
        }
        .badge-hot {
            background: rgba(255,107,107,0.12);
            color: #E04545;
            border-color: rgba(255,107,107,0.2);
        }
        .badge-new {
            background: rgba(0,206,201,0.1);
            color: #009B97;
            border-color: rgba(0,206,201,0.2);
        }

        /* ========== 卡片 ========== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all 0.35s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(108,92,231,0.15);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--bg-light);
        }
        .card-body {
            padding: var(--space-lg);
        }
        .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-bottom: var(--space-sm);
        }
        .card-body h3 {
            font-size: var(--font-size-lg);
            font-weight: 700;
            margin-bottom: var(--space-sm);
            color: var(--text-primary);
        }
        .card-body p {
            color: var(--text-secondary);
            font-size: var(--font-size-sm);
            margin-bottom: var(--space-md);
            line-height: 1.7;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: var(--font-size-xs);
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: var(--space-md);
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }
        .card-body .card-link {
            font-weight: 600;
            font-size: var(--font-size-sm);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-body .card-link i {
            transition: transform 0.25s ease;
        }
        .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ========== 网格 ========== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-xl);
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }
        }

        /* ========== 图文区块 ========== */
        .media-block {
            display: flex;
            align-items: center;
            gap: var(--space-3xl);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .media-block.reverse {
            flex-direction: row-reverse;
        }
        .media-block .media-content {
            flex: 1;
        }
        .media-block .media-content h3 {
            font-size: var(--font-size-2xl);
            margin-bottom: var(--space-md);
        }
        .media-block .media-content p {
            color: var(--text-secondary);
            margin-bottom: var(--space-md);
        }
        .media-block .media-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .media-block .media-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: var(--space-sm);
            font-size: var(--font-size-sm);
            color: var(--text-body);
        }
        .media-block .media-content .feature-list li i {
            color: var(--secondary);
            margin-top: 3px;
            flex-shrink: 0;
        }
        .media-block .media-image {
            flex: 0 0 360px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .media-block .media-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        @media (max-width: 820px) {
            .media-block {
                flex-direction: column;
                padding: var(--space-lg);
                gap: var(--space-lg);
            }
            .media-block.reverse {
                flex-direction: column;
            }
            .media-block .media-image {
                flex: 0 0 auto;
                width: 100%;
            }
            .media-block .media-image img {
                height: 200px;
            }
        }

        /* ========== 步骤 / 流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: var(--space-lg);
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all 0.35s ease;
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 800;
            font-size: var(--font-size-xl);
            margin-bottom: var(--space-md);
        }
        .step-card h4 {
            font-size: var(--font-size-base);
            font-weight: 700;
            margin-bottom: var(--space-sm);
        }
        .step-card p {
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 数据统计 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
            text-align: center;
        }
        .stat-item {
            padding: var(--space-xl) var(--space-lg);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all 0.35s ease;
        }
        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-item .stat-number {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: var(--space-sm);
        }
        .stat-item .stat-number i {
            font-size: var(--font-size-2xl);
            margin-right: 6px;
            color: var(--secondary);
        }
        .stat-item .stat-label {
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-md);
            }
            .stat-item .stat-number {
                font-size: var(--font-size-3xl);
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ========== 文章列表 ========== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: var(--space-lg);
        }
        .article-item {
            display: flex;
            align-items: flex-start;
            gap: var(--space-lg);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all 0.35s ease;
        }
        .article-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(108,92,231,0.15);
        }
        .article-item .article-thumb {
            flex: 0 0 180px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .article-item .article-thumb img {
            width: 100%;
            height: 120px;
            object-fit: cover;
        }
        .article-item .article-info {
            flex: 1;
        }
        .article-item .article-info h4 {
            font-size: var(--font-size-lg);
            font-weight: 700;
            margin-bottom: var(--space-sm);
        }
        .article-item .article-info p {
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            margin-bottom: var(--space-sm);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-item .article-info .article-meta {
            display: flex;
            gap: var(--space-md);
            font-size: var(--font-size-xs);
            color: var(--text-muted);
        }
        .article-item .article-info .article-meta i {
            margin-right: 4px;
        }
        @media (max-width: 768px) {
            .article-item {
                flex-direction: column;
            }
            .article-item .article-thumb {
                flex: 0 0 auto;
                width: 100%;
            }
            .article-item .article-thumb img {
                height: 160px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg);
            font-size: var(--font-size-base);
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            text-align: left;
            cursor: pointer;
            transition: background 0.25s ease;
            gap: var(--space-md);
        }
        .faq-question:hover {
            background: rgba(108,92,231,0.03);
        }
        .faq-question i {
            color: var(--primary);
            font-size: var(--font-size-lg);
            transition: transform 0.35s ease;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 var(--space-lg) var(--space-lg);
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 60%, #2D1B69 100%);
            padding: var(--space-4xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-inverse);
            font-size: var(--font-size-3xl);
            font-weight: 800;
            margin-bottom: var(--space-md);
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            max-width: 520px;
            margin: 0 auto var(--space-xl);
            font-size: var(--font-size-base);
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: var(--space-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 100px;
            font-size: var(--font-size-sm);
            font-weight: 600;
            transition: all 0.3s ease;
            white-space: nowrap;
            border: none;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0,0,0,0.12);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.18);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            border: 1.5px solid rgba(255,255,255,0.35);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.08);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 480px) {
            .cta-section h2 {
                font-size: var(--font-size-2xl);
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.8rem;
            }
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--space-3xl) 0 var(--space-lg);
        }
        .site-footer a {
            color: rgba(255,255,255,0.6);
            transition: color 0.25s ease;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: var(--space-md);
        }
        .footer-brand .logo .logo-text {
            color: #fff;
        }
        .footer-brand .logo .logo-text span {
            color: var(--secondary-light);
        }
        .footer-brand p {
            font-size: var(--font-size-sm);
            line-height: 1.7;
            margin-bottom: var(--space-lg);
            max-width: 320px;
            color: rgba(255,255,255,0.55);
        }
        .footer-social {
            display: flex;
            gap: var(--space-md);
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-full);
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.6);
            font-size: var(--font-size-lg);
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: var(--font-size-sm);
            font-weight: 700;
            margin-bottom: var(--space-lg);
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .footer-col ul li a {
            font-size: var(--font-size-sm);
            color: rgba(255,255,255,0.5);
        }
        .footer-col ul li a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--space-lg);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--space-md);
            font-size: var(--font-size-xs);
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }
        @media (max-width: 820px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-xl);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        /* ========== 分割线 ========== */
        .divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 0 auto var(--space-lg);
        }

        /* ========== 标签云 ========== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            justify-content: center;
            margin-top: var(--space-lg);
        }
        .tag-cloud a {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 100px;
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .tag-cloud a:hover {
            color: var(--primary);
            border-color: var(--primary-light);
            background: rgba(108,92,231,0.04);
            transform: translateY(-2px);
        }

        /* ========== 空状态/加载 ========== */
        .empty-state {
            text-align: center;
            padding: var(--space-3xl) var(--space-lg);
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 3rem;
            margin-bottom: var(--space-lg);
            color: var(--border-color);
        }

        /* ========== 工具类 ========== */
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--space-lg);
        }
        .mt-xl {
            margin-top: var(--space-xl);
        }
        .mb-lg {
            margin-bottom: var(--space-lg);
        }
        .mb-xl {
            margin-bottom: var(--space-xl);
        }
        .gap-sm {
            gap: var(--space-sm);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ========== 动画 ========== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }

        /* ========== 响应式微调 ========== */
        @media (max-width: 520px) {
            .section {
                padding: var(--space-2xl) 0;
            }
            .section-title h2 {
                font-size: var(--font-size-2xl);
            }
            .page-banner h1 {
                font-size: var(--font-size-2xl);
            }
            .stat-item .stat-number {
                font-size: var(--font-size-2xl);
            }
            .card-img {
                height: 160px;
            }
        }