/* roulang page: index */
:root {
    --primary: #2E6FF2;
    --primary-hover: #2457d0;
    --secondary: #0B1E3F;
    --accent: #3CF0C5;
    --bg: #F4F8FF;
    --bg-alt: #EAF1FD;
    --card: #FFFFFF;
    --text: #1A2333;
    --text-secondary: #5A6478;
    --text-muted: #8A94AD;
    --border: #D9E1F0;
    --danger: #FF4D4F;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 4px 16px rgba(15, 40, 90, 0.08);
    --shadow-hover: 0 8px 32px rgba(15, 40, 90, 0.15);
    --shadow-nav: 0 4px 20px rgba(15, 40, 90, 0.05);
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}
img {
    max-width: 100%;
    display: block;
}
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}
input,
textarea {
    font-family: inherit;
}
.num-font {
    font-family: 'Arial Narrow', 'DIN Alternate', sans-serif;
    font-feature-settings: 'tnum';
}
.container-wide {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}
/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.92);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-nav);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 16px;
}
.logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    min-width: 0;
}
.logo-text {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--secondary);
    white-space: nowrap;
}
.logo-text span {
    color: var(--primary);
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}
.nav-link {
    position: relative;
    display: inline-block;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--primary);
    background: rgba(46, 111, 242, 0.06);
}
.nav-link.active {
    color: var(--primary);
    font-weight: 600;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 18px;
    right: calc(100% - 18px);
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: right 0.2s ease;
}
.nav-link:hover::after,
.nav-link.active::after {
    right: 18px;
}
.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 24px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border-radius: 9999px;
    transition: filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 10px rgba(46, 111, 242, 0.3);
    white-space: nowrap;
}
.nav-cta:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 111, 242, 0.35);
    color: #fff;
}
.nav-cta:active {
    transform: translateY(0);
}
.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: rgba(46, 111, 242, 0.06);
    transition: background 0.2s ease;
}
.hamburger:hover {
    background: rgba(46, 111, 242, 0.12);
}
.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--secondary);
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
}
.hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}
.mobile-menu {
    display: none;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 30px rgba(15, 40, 90, 0.08);
}
.mobile-menu.open {
    display: block;
}
.mobile-menu .mobile-nav-link {
    display: block;
    padding: 15px 20px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    border-bottom: 1px solid rgba(217, 225, 240, 0.7);
    transition: background 0.2s ease, color 0.2s ease;
}
.mobile-menu .mobile-nav-link:hover {
    background: var(--bg-alt);
    color: var(--primary);
}
.mobile-menu .mobile-nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(46, 111, 242, 0.06);
}
.mobile-menu .mobile-nav-cta {
    display: block;
    margin: 16px 20px;
    text-align: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border-radius: 9999px;
}
/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border-radius: 9999px;
    transition: filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 18px rgba(46, 111, 242, 0.35);
}
.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(46, 111, 242, 0.4);
    color: #fff;
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(46, 111, 242, 0.3);
}
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    background: transparent;
    border: 2px solid var(--primary);
    border-radius: 9999px;
    transition: background 0.2s ease, transform 0.2s ease;
}
.btn-secondary:hover {
    background: rgba(46, 111, 242, 0.08);
    transform: translateY(-1px);
}
.btn-secondary:active {
    transform: translateY(0);
}
.btn-accent {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 700;
    color: var(--secondary);
    background: var(--accent);
    border-radius: 9999px;
    transition: filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 18px rgba(60, 240, 197, 0.3);
}
.btn-accent:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(60, 240, 197, 0.4);
    color: var(--secondary);
}
.btn-accent:active {
    transform: translateY(0);
}
/* ===== Hero ===== */
.hero {
    position: relative;
    background: linear-gradient(138deg, #0B1E3F 0%, #10285A 48%, #0B1E3F 100%);
    overflow: hidden;
    padding: 88px 0 128px;
    min-height: 580px;
}
.hero-bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.22;
}
.hero::before {
    content: '';
    position: absolute;
    top: -180px;
    left: -140px;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(46, 111, 242, 0.3) 0%, transparent 70%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -140px;
    right: -120px;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(60, 240, 197, 0.18) 0%, transparent 70%);
    pointer-events: none;
}
.hero-ring-1 {
    position: absolute;
    top: 60px;
    right: 22%;
    width: 160px;
    height: 160px;
    opacity: 0.35;
    pointer-events: none;
}
.hero-ring-2 {
    position: absolute;
    bottom: 80px;
    left: 45%;
    width: 90px;
    height: 90px;
    opacity: 0.25;
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 56px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}
.hero-left {
    flex: 1 1 52%;
    min-width: 0;
}
.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: #ffffff;
}
.hero-title-sub {
    display: block;
    margin-top: 12px;
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 600;
    letter-spacing: 0;
    color: rgba(140, 180, 255, 0.92);
}
.hero-subtitle {
    margin-top: 20px;
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.72);
    max-width: 560px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 36px;
}
.hero-visual {
    flex: 0 1 44%;
    min-width: 0;
    position: relative;
}
.hero-visual-inner {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
}
.hero-visual img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}
.hero-visual-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 30, 63, 0.65) 0%, rgba(11, 30, 63, 0.05) 60%, transparent 100%);
}
.hero-visual-label {
    position: absolute;
    bottom: 18px;
    left: 18px;
    right: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #fff;
}
.hero-visual-label .title {
    font-weight: 700;
    font-size: 15px;
}
.hero-visual-label .tag {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 9999px;
    background: rgba(60, 240, 197, 0.2);
    color: var(--accent);
    border: 1px solid rgba(60, 240, 197, 0.3);
}
.hero-float-card {
    position: absolute;
    top: -18px;
    right: -14px;
    background: #fff;
    border-radius: 14px;
    padding: 12px 18px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
    z-index: 3;
}
.hero-float-card .label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.hero-float-card .value {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
    margin-top: 2px;
}
.hero-float-card-2 {
    position: absolute;
    bottom: -16px;
    left: -18px;
    background: #fff;
    border-radius: 14px;
    padding: 12px 18px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
    z-index: 3;
}
.hero-float-card-2 .label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.hero-float-card-2 .value {
    font-size: 18px;
    font-weight: 800;
    color: var(--secondary);
    margin-top: 2px;
}
.hero-stats-bar {
    position: absolute;
    bottom: -48px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 2.5rem);
    max-width: 1000px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 16px;
    padding: 14px 20px;
    z-index: 4;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}
.hero-stat {
    text-align: center;
    padding: 6px 8px;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-stat:last-child {
    border-right: none;
}
.hero-stat .stat-value {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
}
.hero-stat .stat-value .accent {
    color: var(--accent);
}
.hero-stat .stat-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.58);
    margin-top: 2px;
    font-weight: 500;
}
/* ===== Sections ===== */
.section-block {
    padding: 96px 0;
    position: relative;
}
.section-block-alt {
    background: var(--bg-alt);
}
.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.section-title {
    font-size: clamp(1.375rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.005em;
    color: var(--text);
    line-height: 1.35;
}
.section-title-mark {
    display: inline-block;
    width: 4px;
    height: 22px;
    border-radius: 4px;
    background: var(--primary);
    margin-right: 12px;
    vertical-align: -3px;
}
.section-desc {
    margin-top: 8px;
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
}
.section-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 9999px;
    background: rgba(46, 111, 242, 0.06);
    transition: background 0.2s ease, transform 0.2s ease;
}
.section-link:hover {
    background: rgba(46, 111, 242, 0.12);
    transform: translateX(2px);
}
/* ===== Category Cards ===== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 24px;
}
.category-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
}
.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.category-card-main {
    grid-column: span 6;
}
.category-card-sub {
    grid-column: span 5;
}
.category-card-img {
    position: relative;
    overflow: hidden;
}
.category-card-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.category-card:hover .category-card-img img {
    transform: scale(1.04);
}
.category-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 30, 63, 0.88) 0%, rgba(11, 30, 63, 0.2) 55%, transparent 100%);
}
.category-card-body {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
}
.category-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: rgba(46, 111, 242, 0.9);
    border-radius: 9999px;
    margin-bottom: 10px;
}
.category-card-title {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
}
.category-card-desc {
    margin-top: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.72);
    line-height: 1.7;
}
.category-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    transition: gap 0.2s ease;
}
.category-card:hover .category-card-link {
    gap: 8px;
}
/* ===== Featured Cards ===== */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.featured-card {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}
.featured-card.middle-up {
    margin-top: -16px;
}
.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(46, 111, 242, 0.3);
}
.featured-card-img {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
}
.featured-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.featured-card:hover .featured-card-img img {
    transform: scale(1.04);
}
.featured-card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border-radius: 9999px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
.featured-card-badge.hot {
    background: var(--danger);
}
.featured-card-badge.new {
    background: var(--accent);
    color: var(--secondary);
}
.featured-card-body {
    padding: 20px 20px 18px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.featured-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}
.featured-card:hover .featured-card-title {
    color: var(--primary);
}
.featured-card-excerpt {
    margin-top: 10px;
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.featured-card-footer {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid rgba(217, 225, 240, 0.7);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}
.featured-card-readmore {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}
/* ===== News / CMS ===== */
.news-layout {
    display: grid;
    grid-template-columns: 1fr;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 40px 40px;
    position: relative;
    overflow: hidden;
}
.news-layout::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}
.news-timeline {
    position: relative;
    padding-left: 28px;
}
.news-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent), transparent);
    border-radius: 2px;
    opacity: 0.4;
}
.news-item {
    position: relative;
    padding: 20px 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.news-item:hover {
    border-color: rgba(46, 111, 242, 0.35);
    box-shadow: var(--shadow-card);
    transform: translateX(4px);
}
.news-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 26px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid #fff;
    box-shadow: 0 0 0 3px rgba(46, 111, 242, 0.2);
}
.news-item-header {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.news-category {
    display: inline-block;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(46, 111, 242, 0.08);
    border-radius: 9999px;
}
.news-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    display: block;
    transition: color 0.2s ease;
}
.news-title:hover {
    color: var(--primary);
}
.news-excerpt {
    margin-top: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-meta {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(217, 225, 240, 0.6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
}
.news-readmore {
    font-weight: 600;
    color: var(--primary);
    font-size: 13px;
    transition: gap 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.news-readmore:hover {
    gap: 8px;
}
.news-empty {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border);
}
.news-empty .empty-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    background: linear-gradient(145deg, rgba(46, 111, 242, 0.08), rgba(60, 240, 197, 0.08));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}
.news-empty .empty-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-top: 8px;
}
.news-empty .empty-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
}
/* ===== FAQ ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover {
    border-color: rgba(46, 111, 242, 0.3);
    box-shadow: var(--shadow-card);
}
.faq-item.open {
    border-color: rgba(46, 111, 242, 0.4);
    box-shadow: var(--shadow-card);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    transition: background 0.2s ease;
}
.faq-question:hover {
    background: rgba(46, 111, 242, 0.03);
}
.faq-question .q-text {
    display: flex;
    align-items: center;
    gap: 12px;
}
.faq-question .q-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
    box-shadow: 0 0 0 3px rgba(46, 111, 242, 0.15);
}
.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(46, 111, 242, 0.08);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
    transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.faq-answer-inner {
    padding: 4px 24px 20px;
    background: #f7faff;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    border-top: 1px dashed rgba(217, 225, 240, 0.6);
    padding-top: 16px;
}
/* ===== CTA ===== */
.cta-section {
    position: relative;
    background: var(--secondary);
    padding: 68px 0 72px;
    overflow: hidden;
    border-radius: 24px;
    max-width: 1200px;
    margin: 0 auto;
}
.cta-section::before {
    content: '';
    position: absolute;
    right: -80px;
    top: -80px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    border: 60px solid rgba(60, 240, 197, 0.08);
    pointer-events: none;
}
.cta-section::after {
    content: '';
    position: absolute;
    left: -60px;
    bottom: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(46, 111, 242, 0.2) 0%, transparent 70%);
    pointer-events: none;
}
.cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}
.cta-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
}
.cta-subtitle {
    margin-top: 12px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.62);
    line-height: 1.7;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}
.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-top: 30px;
}
.cta-backtop {
    display: inline-block;
    margin-top: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.2s ease;
}
.cta-backtop:hover {
    color: var(--accent);
}
/* ===== Footer ===== */
.site-footer {
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.8);
    padding-top: 64px;
    margin-top: 16px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    max-width: 280px;
}
.footer-title {
    font-size: 14px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 18px;
    letter-spacing: 0.02em;
}
.footer-links {
    list-style: none;
    padding: 0;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.82);
    transition: color 0.2s ease, padding-left 0.2s ease;
    display: inline-block;
}
.footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
}
.footer-links a[data-slug] {
    position: relative;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 22px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
}
.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 14px;
}
.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.14);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.footer-social a:hover {
    background: rgba(60, 240, 197, 0.12);
    border-color: rgba(60, 240, 197, 0.35);
    color: var(--accent);
}
.footer-contact-item {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 10px;
    display: flex;
    gap: 8px;
    align-items: center;
}
.footer-contact-item svg {
    flex-shrink: 0;
}
/* ===== Focus visible ===== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .section-block {
        padding: 72px 0;
    }
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .featured-card.middle-up {
        margin-top: 0;
    }
    .hero-content {
        flex-direction: column;
        gap: 48px;
        padding-top: 32px;
    }
    .hero-left,
    .hero-visual {
        flex: 1 1 100%;
        width: 100%;
        max-width: 640px;
    }
    .hero {
        padding-bottom: 120px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}
@media (max-width: 768px) {
    .nav-list {
        display: none;
    }
    .nav-cta-desktop {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .header-inner {
        height: 64px;
    }
    .logo-text {
        font-size: 1.1rem;
    }
    .section-block {
        padding: 56px 0;
    }
    .hero {
        padding: 64px 0 104px;
    }
    .hero-title {
        font-size: clamp(1.6rem, 4vw, 2.2rem);
    }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-actions .btn-primary,
    .hero-actions .btn-secondary {
        width: 100%;
    }
    .hero-visual img {
        height: 240px;
    }
    .hero-stats-bar {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 12px;
        bottom: -72px;
    }
    .hero-stat {
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        border-right: none;
        padding: 8px 12px;
    }
    .hero-stat:nth-child(odd) {
        border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .category-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    .category-card-main,
    .category-card-sub {
        grid-column: 1 / -1;
    }
    .category-card-img img {
        height: 180px;
    }
    .featured-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
}
@media (max-width: 520px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }
    .news-layout {
        padding: 28px 20px;
    }
    .news-item {
        padding: 16px 16px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }
    .hero-float-card,
    .hero-float-card-2 {
        display: none;
    }
    .hero-stats-bar {
        padding: 12px 12px;
        bottom: -76px;
    }
    .hero-stat .stat-value {
        font-size: 16px;
    }
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .cta-actions .btn-accent,
    .cta-actions .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* roulang page: category1 */
:root {
        --primary: #2E6FF2;
        --primary-dark: #2058D0;
        --secondary: #0B1E3F;
        --accent: #3CF0C5;
        --bg: #F4F8FF;
        --card-bg: #FFFFFF;
        --alt-bg: #EAF1FD;
        --text: #1A2333;
        --text-muted: #5A6478;
        --text-light: #8A94AD;
        --border: #D9E1F0;
        --warning: #FF4D4F;
        --radius-lg: 16px;
        --radius-md: 12px;
        --radius-sm: 8px;
        --shadow-card: 0 4px 16px rgba(15, 40, 90, 0.08);
        --shadow-hover: 0 8px 32px rgba(15, 40, 90, 0.15);
        --transition: 0.2s ease;
    }

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

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

    body {
        font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.75;
        font-size: 1rem;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        overflow-x: hidden;
    }

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

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

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

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

    input,
    textarea {
        font-family: inherit;
    }

    .container-wide {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.75);
        -webkit-backdrop-filter: blur(12px);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid transparent;
        transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    }

    .site-header.scrolled {
        background: rgba(255, 255, 255, 0.92);
        border-color: var(--border);
        box-shadow: 0 4px 20px rgba(15, 40, 90, 0.05);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 70px;
        gap: 20px;
    }

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

    .logo-text {
        font-size: 1.3rem;
        font-weight: 800;
        letter-spacing: -0.01em;
        color: var(--text);
        white-space: nowrap;
    }

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

    .nav-list {
        display: flex;
        align-items: center;
        list-style: none;
        gap: 2px;
    }

    .nav-link {
        position: relative;
        display: inline-block;
        padding: 8px 16px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-muted);
        border-radius: 6px;
        transition: color var(--transition);
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 16px;
        right: 16px;
        bottom: 0;
        height: 2px;
        border-radius: 2px;
        background: var(--primary);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.2s ease;
    }

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

    .nav-link:hover::after {
        transform: scaleX(1);
    }

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

    .nav-link.active::after {
        transform: scaleX(1);
    }

    .nav-cta {
        display: inline-block;
        padding: 10px 24px;
        background: var(--primary);
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        border-radius: 999px;
        transition: all var(--transition);
        box-shadow: 0 4px 12px rgba(46, 111, 242, 0.3);
    }

    .nav-cta:hover {
        background: var(--primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 6px 18px rgba(46, 111, 242, 0.35);
    }

    .nav-cta:active {
        transform: translateY(-1px);
    }

    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 10px;
        border-radius: 8px;
        background: var(--alt-bg);
    }

    .hamburger span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

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

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

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

    .mobile-menu {
        display: none;
        flex-direction: column;
        background: #fff;
        border-top: 1px solid var(--border);
        padding: 12px 20px 20px;
    }

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

    .mobile-nav-link {
        display: block;
        padding: 14px 8px;
        font-size: 1.05rem;
        font-weight: 500;
        color: var(--text);
        border-bottom: 1px solid #f0f3f9;
    }

    .mobile-nav-link.active {
        color: var(--primary);
        font-weight: 700;
    }

    .mobile-nav-cta {
        display: block;
        margin-top: 16px;
        padding: 13px 24px;
        background: var(--primary);
        color: #fff !important;
        text-align: center;
        font-weight: 600;
        font-size: 15px;
        border-radius: 999px;
    }

    .mobile-nav-cta:hover {
        background: var(--primary-dark);
    }

    .category-hero {
        position: relative;
        background: linear-gradient(135deg, #0B1E3F 0%, #10294f 55%, #11233f 100%);
        padding: 64px 0 56px;
        overflow: hidden;
    }

    .category-hero::before {
        content: "";
        position: absolute;
        width: 500px;
        height: 500px;
        top: -160px;
        left: -100px;
        background: radial-gradient(circle, rgba(46, 111, 242, 0.35) 0%, transparent 70%);
        pointer-events: none;
    }

    .category-hero::after {
        content: "";
        position: absolute;
        width: 420px;
        height: 420px;
        bottom: -180px;
        right: -80px;
        background: radial-gradient(circle, rgba(60, 240, 197, 0.2) 0%, transparent 70%);
        pointer-events: none;
    }

    .category-hero .hero-content {
        position: relative;
        z-index: 2;
        max-width: 760px;
        -webkit-animation: fadeInUp 0.6s ease both;
        animation: fadeInUp 0.6s ease both;
    }

    .category-hero .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(60, 240, 197, 0.15);
        border: 1px solid rgba(60, 240, 197, 0.3);
        color: var(--accent);
        font-size: 13px;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 999px;
        margin-bottom: 18px;
    }

    .category-hero h1 {
        font-size: clamp(2rem, 4.5vw, 3rem);
        font-weight: 800;
        letter-spacing: -0.01em;
        color: #fff;
        line-height: 1.2;
        margin-bottom: 14px;
    }

    .category-hero .hero-desc {
        font-size: 1.0625rem;
        color: rgba(255, 255, 255, 0.85);
        max-width: 560px;
        line-height: 1.8;
    }

    .category-hero .hero-meta {
        display: flex;
        gap: 28px;
        flex-wrap: wrap;
        margin-top: 24px;
        padding-top: 20px;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
    }

    .category-hero .hero-meta-item {
        color: rgba(255, 255, 255, 0.75);
        font-size: 13px;
    }

    .category-hero .hero-meta-item strong {
        display: block;
        font-size: 1.15rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 2px;
        letter-spacing: -0.01em;
    }

    @-webkit-keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(24px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(24px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .category-main {
        padding: 64px 0 72px;
    }

    .split-layout {
        display: grid;
        grid-template-columns: 32% 68%;
        gap: 32px;
        align-items: start;
    }

    .sidebar-card {
        position: sticky;
        top: 100px;
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border);
        padding: 28px;
    }

    .sidebar-card .sidebar-title {
        font-size: 1.1rem;
        font-weight: 700;
        padding-bottom: 14px;
        margin-bottom: 14px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .sidebar-card .sidebar-title i {
        color: var(--primary);
    }

    .sidebar-card .sidebar-intro {
        font-size: 0.875rem;
        color: var(--text-muted);
        line-height: 1.7;
        margin-bottom: 18px;
    }

    .sidebar-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 2px;
    }

    .sidebar-list a {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 10px 12px;
        border-radius: 8px;
        font-size: 0.925rem;
        font-weight: 500;
        color: var(--text-muted);
        transition: all var(--transition);
    }

    .sidebar-list a::before {
        content: "";
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: var(--border);
        transition: background var(--transition);
    }

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

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

    .sidebar-card .sidebar-status {
        margin-top: 18px;
        padding-top: 16px;
        border-top: 1px solid var(--border);
        font-size: 0.8rem;
        color: var(--text-light);
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .sidebar-card .sidebar-status i {
        color: var(--accent);
    }

    .content-segment {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        padding: 36px 40px;
        margin-bottom: 24px;
        transition: box-shadow var(--transition);
    }

    .content-segment:hover {
        box-shadow: var(--shadow-hover);
    }

    .content-segment .segment-kicker {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        background: rgba(46, 111, 242, 0.08);
        padding: 3px 12px;
        border-radius: 999px;
        margin-bottom: 12px;
    }

    .content-segment h2 {
        font-size: clamp(1.375rem, 2.5vw, 1.8rem);
        font-weight: 700;
        letter-spacing: -0.005em;
        line-height: 1.3;
        margin-bottom: 14px;
        display: flex;
        align-items: flex-start;
        gap: 10px;
    }

    .content-segment h2 .section-num {
        color: var(--primary);
        font-size: 0.8em;
        font-weight: 800;
        line-height: 1.5;
    }

    .content-segment p {
        margin-bottom: 14px;
        color: var(--text);
        font-size: 1rem;
        line-height: 1.8;
    }

    .content-segment p:last-child {
        margin-bottom: 0;
    }

    .content-segment .segment-img {
        border-radius: var(--radius-md);
        overflow: hidden;
        margin-top: 18px;
    }

    .content-segment .segment-img img {
        width: 100%;
        height: auto;
        -o-object-fit: cover;
        object-fit: cover;
        border-radius: var(--radius-md);
        transition: transform 0.3s ease;
    }

    .content-segment .segment-img:hover img {
        transform: scale(1.02);
    }

    .segment-tips {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        margin-top: 18px;
    }

    .segment-tips li {
        display: flex;
        align-items: flex-start;
        gap: 8px;
        background: var(--alt-bg);
        border-radius: 10px;
        padding: 12px 14px;
        font-size: 0.9rem;
        color: var(--text);
        list-style: none;
        line-height: 1.6;
    }

    .segment-tips li i {
        color: var(--primary);
        margin-top: 3px;
    }

    .inner-cta {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        border-radius: var(--radius-lg);
        padding: 32px 40px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        color: #fff;
        margin-top: 8px;
        position: relative;
        overflow: hidden;
    }

    .inner-cta::after {
        content: "";
        position: absolute;
        width: 200px;
        height: 200px;
        top: -60px;
        right: -40px;
        border: 2px solid rgba(60, 240, 197, 0.3);
        border-radius: 50%;
    }

    .inner-cta h3 {
        font-size: 1.3rem;
        font-weight: 700;
        margin-bottom: 6px;
    }

    .inner-cta p {
        font-size: 0.925rem;
        color: rgba(255, 255, 255, 0.85);
    }

    .inner-cta .btn {
        position: relative;
        z-index: 2;
        background: var(--accent);
        color: var(--secondary);
        padding: 12px 32px;
        font-weight: 700;
        border-radius: 999px;
        font-size: 0.95rem;
        transition: all var(--transition);
        white-space: nowrap;
    }

    .inner-cta .btn:hover {
        transform: translateY(-2px);
        -webkit-filter: brightness(1.05);
        filter: brightness(1.05);
        box-shadow: 0 8px 24px rgba(60, 240, 197, 0.35);
    }

    .hot-section {
        padding: 16px 0 72px;
    }

    .section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 24px;
    }

    .section-head h2 {
        font-size: clamp(1.4rem, 2.5vw, 1.9rem);
        font-weight: 700;
        letter-spacing: -0.005em;
    }

    .section-head h2 span {
        color: var(--primary);
    }

    .section-head .view-all {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text-muted);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: all var(--transition);
    }

    .section-head .view-all:hover {
        color: var(--primary);
        gap: 10px;
    }

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

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

    .hot-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(46, 111, 242, 0.3);
    }

    .hot-card .card-img {
        height: 150px;
        overflow: hidden;
        position: relative;
    }

    .hot-card .card-img img {
        width: 100%;
        height: 100%;
        -o-object-fit: cover;
        object-fit: cover;
        transition: transform 0.3s ease;
    }

    .hot-card:hover .card-img img {
        transform: scale(1.03);
    }

    .hot-card .card-tag {
        position: absolute;
        top: 12px;
        left: 12px;
        background: var(--primary);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 3px 10px;
        border-radius: 999px;
    }

    .hot-card .card-body {
        padding: 18px 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .hot-card .card-title {
        font-size: 1rem;
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: 8px;
        color: var(--text);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: color var(--transition);
    }

    .hot-card:hover .card-title {
        color: var(--primary);
    }

    .hot-card .card-desc {
        font-size: 0.875rem;
        color: var(--text-muted);
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        flex: 1;
    }

    .hot-card .card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-top: 14px;
        padding-top: 12px;
        border-top: 1px solid #f0f3f9;
        font-size: 0.8rem;
        color: var(--text-light);
    }

    .hot-card .card-footer .read-more {
        color: var(--primary);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        font-size: 0.82rem;
    }

    .empty-state {
        display: none;
        background: var(--card-bg);
        border: 1px dashed var(--border);
        border-radius: var(--radius-lg);
        padding: 48px 30px;
        text-align: center;
        color: var(--text-muted);
    }

    .empty-state.visible {
        display: block;
    }

    .empty-state i {
        font-size: 2.8rem;
        color: var(--text-light);
        margin-bottom: 16px;
        display: inline-block;
    }

    .empty-state .empty-title {
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--text);
        margin-bottom: 6px;
    }

    .empty-state p {
        font-size: 0.9rem;
        color: var(--text-muted);
    }

    .faq-section {
        background: var(--alt-bg);
        padding: 72px 0;
    }

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

    .faq-item {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        margin-bottom: 12px;
        overflow: hidden;
        transition: border-color var(--transition), box-shadow var(--transition);
    }

    .faq-item:hover {
        border-color: rgba(46, 111, 242, 0.3);
        box-shadow: var(--shadow-card);
    }

    .faq-item.open {
        border-color: rgba(46, 111, 242, 0.4);
    }

    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 18px 22px;
        font-size: 1rem;
        font-weight: 600;
        color: var(--text);
        text-align: left;
        background: none;
        border: none;
        cursor: pointer;
    }

    .faq-question .q-dot {
        width: 8px;
        height: 8px;
        background: var(--primary);
        border-radius: 50%;
        flex-shrink: 0;
        margin-right: 10px;
        display: inline-block;
    }

    .faq-question .q-wrap {
        display: flex;
        align-items: center;
        flex: 1;
    }

    .faq-question .faq-icon {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--alt-bg);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.9rem;
        color: var(--primary);
        transition: transform 0.3s ease, background 0.3s ease;
        flex-shrink: 0;
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .faq-answer-inner {
        padding: 0 22px 20px 52px;
        font-size: 0.9375rem;
        color: var(--text-muted);
        line-height: 1.8;
        background: #F7FAFF;
    }

    .cta-banner {
        position: relative;
        background: var(--secondary);
        padding: 76px 0;
        text-align: center;
        overflow: hidden;
    }

    .cta-banner::before {
        content: "";
        position: absolute;
        width: 500px;
        height: 500px;
        top: -180px;
        right: -140px;
        border: 2px solid rgba(60, 240, 197, 0.15);
        border-radius: 50%;
    }

    .cta-banner::after {
        content: "";
        position: absolute;
        width: 240px;
        height: 240px;
        bottom: -80px;
        left: 80px;
        border: 2px solid rgba(46, 111, 242, 0.2);
        border-radius: 50%;
    }

    .cta-banner .cta-inner {
        position: relative;
        z-index: 2;
    }

    .cta-banner h2 {
        font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        font-weight: 800;
        color: #fff;
        margin-bottom: 12px;
        letter-spacing: -0.01em;
    }

    .cta-banner p {
        font-size: 1rem;
        color: rgba(255, 255, 255, 0.65);
        max-width: 520px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }

    .cta-banner .btn-primary {
        display: inline-block;
        background: var(--accent);
        color: var(--secondary);
        padding: 14px 36px;
        font-size: 1rem;
        font-weight: 700;
        border-radius: 999px;
        transition: all var(--transition);
        box-shadow: 0 6px 24px rgba(60, 240, 197, 0.25);
    }

    .cta-banner .btn-primary:hover {
        transform: translateY(-2px);
        -webkit-filter: brightness(1.05);
        filter: brightness(1.05);
        box-shadow: 0 10px 32px rgba(60, 240, 197, 0.35);
    }

    .cta-banner .btn-secondary {
        display: inline-block;
        margin-left: 14px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        color: #fff;
        padding: 12px 30px;
        font-size: 0.95rem;
        font-weight: 600;
        border-radius: 999px;
        transition: all var(--transition);
    }

    .cta-banner .btn-secondary:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, 0.08);
    }

    .site-footer {
        margin-top: auto;
        background: var(--secondary);
        padding-top: 64px;
        padding-bottom: 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 48px;
    }

    .footer-brand p {
        font-size: 0.875rem;
        color: rgba(255, 255, 255, 0.55);
        margin-top: 12px;
        line-height: 1.75;
        max-width: 320px;
    }

    .footer-social {
        display: flex;
        gap: 10px;
        margin-top: 18px;
    }

    .footer-social a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.08);
        color: rgba(255, 255, 255, 0.7);
        transition: all var(--transition);
    }

    .footer-social a:hover {
        background: var(--accent);
        color: var(--secondary);
        transform: translateY(-2px);
    }

    .footer-col h5 {
        font-size: 0.9rem;
        font-weight: 600;
        color: rgba(255, 255, 255, 0.5);
        margin-bottom: 18px;
        letter-spacing: 0.02em;
    }

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

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

    .footer-col ul a {
        font-size: 0.875rem;
        color: rgba(255, 255, 255, 0.75);
        transition: color var(--transition);
    }

    .footer-col ul a:hover {
        color: var(--accent);
    }

    .footer-contact p {
        font-size: 0.875rem;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 8px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

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

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding: 22px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
    }

    .footer-bottom p {
        font-size: 0.8125rem;
        color: rgba(255, 255, 255, 0.45);
    }

    .footer-bottom .footer-brand-inner {
        font-size: 0.85rem;
        font-weight: 600;
        color: rgba(255, 255, 255, 0.6);
    }

    .footer-bottom .footer-brand-inner span {
        color: var(--accent);
    }

    :focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    @media (max-width: 1024px) {
        .split-layout {
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .sidebar-card {
            position: relative;
            top: auto;
        }

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

    @media (max-width: 767px) {
        .nav-list,
        .nav-cta-desktop {
            display: none;
        }

        .hamburger {
            display: flex;
        }

        .category-hero {
            padding: 44px 0 40px;
        }

        .category-main {
            padding: 40px 0 48px;
        }

        .content-segment {
            padding: 24px 20px;
        }

        .segment-tips {
            grid-template-columns: 1fr;
        }

        .inner-cta {
            flex-direction: column;
            text-align: center;
            padding: 28px 20px;
        }

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

        .faq-section {
            padding: 48px 0;
        }

        .cta-banner {
            padding: 56px 0;
        }

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

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

    @media (max-width: 520px) {
        .logo-text {
            font-size: 1.1rem;
        }

        .category-hero .hero-meta {
            gap: 16px;
        }

        .category-hero .hero-desc {
            font-size: 0.95rem;
        }

        .section-head h2 {
            font-size: 1.3rem;
        }

        .content-segment h2 {
            font-size: 1.2rem;
        }

        .inner-cta h3 {
            font-size: 1.1rem;
        }

        .cta-banner .btn-secondary {
            margin-left: 0;
            margin-top: 10px;
        }
    }

/* roulang page: article */
:root {
    --primary: #2E6FF2;
    --primary-dark: #1E5EDB;
    --deep-blue: #0B1E3F;
    --aurora: #3CF0C5;
    --bg-main: #F4F8FF;
    --bg-alt: #EAF1FD;
    --card-bg: #FFFFFF;
    --text-main: #1A2333;
    --text-secondary: #5A6478;
    --text-muted: #8A94AD;
    --border-color: #D9E1F0;
    --warning: #FF4D4F;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 4px 16px rgba(15,40,90,0.08);
    --shadow-hover: 0 8px 32px rgba(15,40,90,0.15);
    --shadow-nav: 0 4px 20px rgba(15,40,90,0.05);
    --transition: 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-width: 320px;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}

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

.container-wide {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* === Header === */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
    background: rgba(255,255,255,0.96);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-nav);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--deep-blue);
    letter-spacing: -0.01em;
    white-space: nowrap;
}

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

.nav-list {
    display: flex;
    list-style: none;
    gap: 4px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    border-radius: 8px;
    transition: color var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
}

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

.nav-link:hover::after {
    transform: scaleX(1);
}

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

.nav-link.active::after {
    transform: scaleX(1);
}

.nav-cta {
    display: inline-block;
    padding: 10px 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition);
    flex-shrink: 0;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(46,111,242,0.35);
    color: #fff;
}

.nav-cta:active {
    transform: translateY(0);
}

.nav-cta-desktop {
    display: inline-block;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--deep-blue);
    border-radius: 2px;
    transition: all 0.25s ease;
}

.hamburger.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.is-active span:nth-child(2) {
    opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: #fff;
    border-top: 1px solid var(--border-color);
    padding: 8px 16px 20px;
}

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

.mobile-nav-link {
    display: block;
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-main);
    border-bottom: 1px solid #f0f3fa;
    transition: color 0.2s ease;
}

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

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

.mobile-nav-cta {
    display: block;
    text-align: center;
    margin: 16px 0 8px;
    padding: 13px;
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.2s ease, transform 0.2s ease;
}

.mobile-nav-cta:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

/* === Article Hero === */
.article-hero-section {
    position: relative;
    background: linear-gradient(135deg, #EAF1FD 0%, #F4F8FF 50%, #E4EDFC 100%);
    padding: 32px 0 56px;
    overflow: hidden;
}

.article-hero-section::before {
    content: '';
    position: absolute;
    top: -80px;
    left: -80px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(46,111,242,0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.article-hero-section::after {
    content: '';
    position: absolute;
    bottom: -120px;
    right: -60px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(60,240,197,0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-decor {
    position: absolute;
    top: 20px;
    right: -30px;
    width: 180px;
    height: 180px;
    border: 2px solid rgba(46,111,242,0.12);
    border-radius: 50%;
    pointer-events: none;
}

.hero-decor::before {
    content: '';
    position: absolute;
    top: 24px;
    left: 24px;
    width: 130px;
    height: 130px;
    border: 2px dashed rgba(60,240,197,0.25);
    border-radius: 50%;
}

.breadcrumb {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.breadcrumb .sep {
    color: #b8c4da;
    font-size: 16px;
    line-height: 1;
}

.breadcrumb .current {
    color: var(--text-secondary);
    font-weight: 500;
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.article-header {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto 0 0;
    padding: 20px 0 0;
}

.article-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    line-height: 1.35;
    color: var(--text-main);
    letter-spacing: -0.01em;
    margin-bottom: 16px;
    word-break: break-word;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
    font-size: 14px;
    color: var(--text-muted);
}

.article-meta .cat-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

.article-meta .views {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* === Article Body === */
.article-body {
    position: relative;
    z-index: 5;
    margin-top: -28px;
    padding-bottom: 0;
}

.article-content {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 40px 48px;
    max-width: 760px;
    margin: 0 auto;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--text-main);
    min-width: 0;
}

.article-content p {
    margin-bottom: 1.5em;
    word-spacing: 0.05em;
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2em 0 0.8em;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
    line-height: 1.4;
    color: var(--text-main);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.8em 0 0.6em;
    padding-left: 12px;
    border-left: 3px solid var(--aurora);
    line-height: 1.4;
}

.article-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.5em 0 0.5em;
    color: var(--text-main);
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--bg-alt);
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    margin: 1.5em 0;
    color: var(--text-secondary);
    font-style: normal;
}

.article-content img {
    border-radius: 16px;
    margin: 1.5em 0;
    width: auto;
    height: auto;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1.5em 1.5em;
    padding: 0;
}

.article-content li {
    margin-bottom: 0.5em;
    padding-left: 4px;
}

.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(46,111,242,0.35);
}

.article-content a:hover {
    color: var(--primary-dark);
    text-decoration-color: var(--primary-dark);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.95em;
}

.article-content table th,
.article-content table td {
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    text-align: left;
}

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

.article-content code {
    background: var(--bg-alt);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--primary-dark);
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2em 0;
}

/* Not found */
.not-found {
    text-align: center;
    padding: 70px 20px;
}

.not-found-icon {
    display: block;
    font-size: 64px;
    line-height: 1;
    margin-bottom: 20px;
}

.not-found p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.not-found a {
    display: inline-block;
    padding: 12px 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s ease;
}

.not-found a:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(46,111,242,0.3);
    color: #fff;
}

/* Prev Next */
.article-prev-next {
    max-width: 760px;
    margin: 24px auto 0;
    display: flex;
    gap: 16px;
}

.article-prev-next a {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: 2px solid var(--primary);
    border-radius: 999px;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    background: transparent;
    transition: all 0.2s ease;
    min-width: 0;
}

.article-prev-next a:hover {
    background: rgba(46,111,242,0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46,111,242,0.12);
}

.article-prev-next a:active {
    transform: translateY(0);
}

.article-prev-next .arrow {
    font-size: 18px;
    line-height: 1;
    flex-shrink: 0;
}

.back-category {
    max-width: 760px;
    margin: 20px auto 0;
    text-align: center;
}

.back-category a {
    display: inline-block;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.back-category a:hover {
    color: var(--primary);
    background: rgba(46,111,242,0.06);
}

/* === Related Section === */
.related-section {
    padding: 72px 0 56px;
    background: var(--bg-alt);
    margin-top: 48px;
    border-top: 1px solid var(--border-color);
}

.related-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
    flex-wrap: wrap;
}

.related-header h2 {
    font-size: clamp(1.375rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.005em;
}

.related-header .more-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 0;
    transition: all 0.2s ease;
}

.related-header .more-link:hover {
    color: var(--primary-dark);
    gap: 10px;
}

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

.related-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
    min-width: 0;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(46,111,242,0.3);
}

.related-card .thumb {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
}

.related-card .thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.related-card .body {
    padding: 20px 20px 18px;
}

.related-card .tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.related-card h3 {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 8px;
}

.related-card h3 a {
    color: var(--text-main);
    transition: color 0.2s ease;
}

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

.related-card .desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === Article CTA === */
.article-cta {
    position: relative;
    background: var(--deep-blue);
    padding: 72px 0;
    overflow: hidden;
}

.article-cta::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -80px;
    width: 340px;
    height: 340px;
    border: 2px solid rgba(60,240,197,0.2);
    border-radius: 50%;
    pointer-events: none;
}

.article-cta::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: 40px;
    width: 200px;
    height: 200px;
    border: 2px dashed rgba(46,111,242,0.25);
    border-radius: 50%;
    pointer-events: none;
}

.article-cta .container-wide {
    position: relative;
    z-index: 2;
    text-align: center;
}

.article-cta h2 {
    color: #fff;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.article-cta p {
    color: rgba(255,255,255,0.6);
    font-size: 16px;
    max-width: 480px;
    margin: 0 auto 28px;
    line-height: 1.7;
}

.cta-btns {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.cta-btns .btn-secondary {
    display: inline-block;
    padding: 12px 28px;
    border: 2px solid rgba(255,255,255,0.4);
    border-radius: 999px;
    color: rgba(255,255,255,0.9);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.cta-btns .btn-secondary:hover {
    background: var(--aurora);
    border-color: var(--aurora);
    color: var(--deep-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(60,240,197,0.25);
}

/* === Footer === */
.site-footer {
    background: var(--deep-blue);
    color: rgba(255,255,255,0.8);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255,255,255,0.55);
    margin-top: 16px;
    max-width: 280px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.75);
    transition: all 0.2s ease;
}

.footer-social a:hover {
    background: var(--aurora);
    color: var(--deep-blue);
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255,255,255,0.55);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

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

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

.footer-col ul li a {
    font-size: 13px;
    color: rgba(255,255,255,0.78);
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: var(--aurora);
}

.footer-contact li {
    font-size: 13px;
    color: rgba(255,255,255,0.65);
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-contact li svg {
    flex-shrink: 0;
    opacity: 0.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: rgba(255,255,255,0.45);
    flex-wrap: wrap;
}

.footer-bottom a {
    color: rgba(255,255,255,0.45);
    transition: color 0.2s ease;
}

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

/* === Responsive === */
@media (max-width: 1024px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .nav-list {
        display: none;
    }
    .nav-cta-desktop {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .article-hero-section {
        padding: 20px 0 48px;
    }
    .article-header h1 {
        font-size: 1.6rem;
    }
    .article-content {
        padding: 24px 22px;
        font-size: 1rem;
        border-radius: var(--radius-md);
    }
    .article-body {
        margin-top: -20px;
    }
    .article-prev-next {
        flex-direction: column;
        gap: 12px;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .cta-btns .btn-secondary {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
    .article-cta {
        padding: 56px 0;
    }
    .article-cta p {
        font-size: 15px;
    }
}

@media (max-width: 520px) {
    .breadcrumb .current {
        max-width: 200px;
    }
    .article-header h1 {
        font-size: 1.4rem;
    }
    .article-content {
        padding: 20px 16px;
        font-size: 0.98rem;
        line-height: 1.85;
    }
    .article-content h2 {
        font-size: 1.3rem;
        padding-left: 10px;
    }
    .article-meta {
        gap: 8px 12px;
        font-size: 13px;
    }
    .related-section {
        padding: 56px 0 40px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        justify-content: center;
    }
    .footer-grid {
        padding-bottom: 32px;
    }
}

/* roulang page: category2 */
:root {
            --primary: #2E6FF2;
            --primary-dark: #1B4FD0;
            --secondary: #0B1E3F;
            --aurora: #3CF0C5;
            --bg-body: #F4F8FF;
            --bg-card: #FFFFFF;
            --bg-alt: #EAF1FD;
            --text-main: #1A2333;
            --text-sub: #5A6478;
            --text-note: #8A94AD;
            --border: #D9E1F0;
            --danger: #FF4D4F;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(15, 40, 90, 0.08);
            --shadow-hover: 0 8px 32px rgba(15, 40, 90, 0.15);
            --shadow-nav: 0 4px 20px rgba(15, 40, 90, 0.05);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            min-width: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .section-space {
            padding-top: 96px;
            padding-bottom: 96px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.78);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            border-bottom-color: var(--border);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

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

        .logo-text {
            font-size: 1.28rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

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

        .nav-list {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 2px;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 8px;
            transition: color 0.2s ease;
            white-space: nowrap;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.2s ease;
        }

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

        .nav-link:hover::after {
            transform: scaleX(1);
        }

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

        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            padding: 10px 26px;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 4px 14px rgba(46, 111, 242, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46, 111, 242, 0.35);
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-cta:focus-visible {
            outline: 2px solid var(--aurora);
            outline-offset: 3px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.2s ease;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .hamburger:hover {
            background: var(--bg-alt);
        }

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

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

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

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 12px 20px 20px;
            position: absolute;
            left: 0;
            right: 0;
            top: 72px;
            box-shadow: 0 20px 30px rgba(15, 40, 90, 0.08);
        }

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

        .mobile-nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 1px solid var(--bg-alt);
            border-radius: 8px;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .mobile-nav-link:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }

        .mobile-nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(46, 111, 242, 0.06);
        }

        .mobile-nav-cta {
            display: block;
            text-align: center;
            margin-top: 14px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 14px;
            border-radius: 999px;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .mobile-nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* Page Hero (矮版) */
        .page-hero {
            position: relative;
            padding: 64px 0 56px;
            background: linear-gradient(135deg, #EAF1FD 0%, #DCE8FC 45%, #F4F8FF 100%);
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 111, 242, 0.16), transparent 70%);
            top: -120px;
            right: -80px;
            pointer-events: none;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            border: 1px solid rgba(60, 240, 197, 0.45);
            bottom: -100px;
            left: 12%;
            pointer-events: none;
        }

        .hero-eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(46, 111, 242, 0.1);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 18px;
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.25rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--secondary);
            line-height: 1.15;
            margin-bottom: 16px;
        }

        .hero-lead {
            font-size: 1.0625rem;
            line-height: 1.8;
            color: var(--text-sub);
            max-width: 620px;
            margin-bottom: 0;
        }

        /* Category Main */
        .category-main {
            display: grid;
            grid-template-columns: 32% 68%;
            gap: 40px;
            padding-top: 64px;
            padding-bottom: 96px;
            align-items: start;
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            position: sticky;
            top: 96px;
        }

        .sidebar-card h2 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 18px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--bg-alt);
            position: relative;
        }

        .sidebar-card h2::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--aurora);
            border-radius: 2px;
        }

        .toc-list {
            list-style: none;
        }

        .toc-list li+li {
            border-top: 1px solid var(--bg-alt);
        }

        .toc-list a {
            display: block;
            padding: 12px 4px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-left: 3px solid transparent;
            transition: all 0.2s ease;
        }

        .toc-list a:hover {
            color: var(--primary);
            border-left-color: var(--primary);
            padding-left: 10px;
        }

        .sidebar-note {
            margin-top: 22px;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            padding: 16px;
            font-size: 0.875rem;
            color: var(--text-sub);
            line-height: 1.7;
            border-left: 3px solid var(--aurora);
        }

        .category-content {
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 44px;
        }

        .content-block {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 32px;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
        }

        .content-block:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 111, 242, 0.3);
        }

        .block-tag {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 3px 12px;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .block-tag.green {
            background: var(--aurora);
            color: var(--secondary);
        }

        .content-block h2 {
            font-size: clamp(1.375rem, 2.5vw, 1.75rem);
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.005em;
            margin-bottom: 14px;
            line-height: 1.4;
            position: relative;
            padding-left: 14px;
        }

        .content-block h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 5px;
            bottom: 5px;
            width: 4px;
            border-radius: 4px;
            background: var(--primary);
        }

        .content-block p {
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-sub);
            margin-bottom: 16px;
        }

        .content-block p strong {
            color: var(--text-main);
            font-weight: 600;
        }

        .content-block .block-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-top: 18px;
            position: relative;
            aspect-ratio: 16/9;
            background: var(--bg-alt);
        }

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

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

        .content-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 8px;
        }

        .content-point {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            padding: 12px 14px;
            font-size: 0.875rem;
            color: var(--text-sub);
            line-height: 1.6;
        }

        .content-point i {
            color: var(--aurora);
            font-size: 0.875rem;
            margin-top: 4px;
        }

        .content-point strong {
            color: var(--text-main);
            font-weight: 600;
        }

        /* CTA Banner */
        .cta-banner {
            position: relative;
            background: var(--secondary);
            padding: 72px 0;
            overflow: hidden;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            border: 2px solid rgba(60, 240, 197, 0.35);
            right: -120px;
            top: -160px;
            pointer-events: none;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(60, 240, 197, 0.2), transparent 70%);
            left: 8%;
            bottom: -80px;
            pointer-events: none;
        }

        .cta-banner .container-wide {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-banner h2 {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            color: #fff;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .cta-banner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

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

        .btn-aurora {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--aurora);
            color: var(--secondary);
            font-size: 15px;
            font-weight: 700;
            border-radius: 999px;
            padding: 12px 32px;
            transition: filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 4px 20px rgba(60, 240, 197, 0.25);
        }

        .btn-aurora:hover {
            filter: brightness(1.05);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(60, 240, 197, 0.35);
        }

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

        .btn-aurora:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.6);
            border-radius: 999px;
            padding: 10px 28px;
            transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-outline-white:focus-visible {
            outline: 2px solid var(--aurora);
            outline-offset: 3px;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-body);
            padding-top: 96px;
            padding-bottom: 96px;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(46, 111, 242, 0.1);
            border-radius: 999px;
            padding: 5px 14px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-head p {
            font-size: 1rem;
            color: var(--text-sub);
            margin-top: 12px;
            line-height: 1.7;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 0;
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .faq-item:hover {
            border-color: rgba(46, 111, 242, 0.35);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-question::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }

        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            transition: transform 0.3s ease, background 0.2s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px 56px;
            font-size: 0.9375rem;
            color: var(--text-sub);
            line-height: 1.75;
        }

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

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand p {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            margin-top: 4px;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            transition: all 0.2s ease;
        }

        .footer-social a:hover {
            background: var(--aurora);
            color: var(--secondary);
            border-color: var(--aurora);
            transform: translateY(-2px);
        }

        .footer-col h3 {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.5);
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

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

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

        .footer-col a {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: var(--aurora);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom .site-name {
            color: rgba(255, 255, 255, 0.65);
            font-weight: 600;
        }

        /* Focus visible 全局 */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 6px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

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

            .sidebar-card {
                position: static;
            }
        }

        @media (max-width: 768px) {
            .nav-list,
            .nav-cta-desktop {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .section-space {
                padding-top: 56px;
                padding-bottom: 56px;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

            .category-main {
                padding-top: 40px;
                padding-bottom: 64px;
            }

            .content-block {
                padding: 24px 20px;
            }

            .content-points {
                grid-template-columns: 1fr;
            }

            .content-block .block-image {
                aspect-ratio: 16/10;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer-inner {
                padding: 0 18px 16px 44px;
            }

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

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

        @media (max-width: 520px) {
            .container-wide,
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-inner {
                height: 64px;
            }

            .mobile-menu {
                top: 64px;
            }

            .logo-text {
                font-size: 1.1rem;
            }

            .page-hero h1 {
                font-size: 1.9rem;
            }

            .hero-lead {
                font-size: 0.9375rem;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-actions .btn-aurora,
            .cta-actions .btn-outline-white {
                justify-content: center;
                width: 100%;
            }

            .faq-question::before {
                display: none;
            }

            .faq-answer-inner {
                padding-left: 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2E6FF2;
            --deep: #0B1E3F;
            --aurora: #3CF0C5;
            --bg: #F4F8FF;
            --card: #FFFFFF;
            --line: #D9E1F0;
            --text: #1A2333;
            --subtext: #5A6478;
            --mute: #8A94AD;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(15, 40, 90, 0.08);
            --shadow-hover: 0 8px 32px rgba(15, 40, 90, 0.15);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            font-family: inherit;
        }
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.78);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
            border-bottom: 1px solid transparent;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            border-bottom-color: var(--line);
            box-shadow: 0 4px 20px rgba(15, 40, 90, 0.05);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }
        .logo-wrap {
            display: inline-flex;
            align-items: center;
            gap: 0.65rem;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--deep);
            line-height: 1.2;
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--subtext);
            border-radius: 999px;
            transition: color .2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: 999px;
            transition: all .2s ease;
        }
        .nav-cta:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(46, 111, 242, 0.25);
        }
        .nav-cta:active {
            transform: translateY(0);
        }
        .nav-cta-desktop {
            display: inline-flex;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border: none;
            background: transparent;
            cursor: pointer;
            padding: 10px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--deep);
            transition: transform .25s ease, opacity .2s ease;
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: #fff;
            border-top: 1px solid var(--line);
            padding: 8px 20px 20px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-nav-link {
            display: block;
            padding: 14px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid #EAF1FD;
            transition: color .2s ease;
        }
        .mobile-nav-link:hover {
            color: var(--primary);
        }
        .mobile-nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }
        .mobile-nav-cta {
            display: block;
            margin-top: 16px;
            padding: 12px 24px;
            text-align: center;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: 999px;
        }

        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, #EAF1FD 0%, #F4F8FF 55%, #EAF1FD 100%);
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            left: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 111, 242, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            bottom: -140px;
            right: -60px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(60, 240, 197, 0.18), transparent 70%);
            pointer-events: none;
        }
        .cat-hero .hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .cat-hero .hero-copy {
            flex: 1;
            max-width: 560px;
        }
        .cat-hero .hero-visual {
            flex: 0 0 45%;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .cat-hero .hero-visual img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(46, 111, 242, 0.1);
            border-radius: 999px;
            margin-bottom: 18px;
        }
        .hero-cat-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--deep);
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .hero-cat-sub {
            font-size: 1.0625rem;
            line-height: 1.8;
            color: var(--subtext);
            max-width: 520px;
        }

        /* ===== Dual layout ===== */
        .dual-section {
            padding: 72px 0;
        }
        .dual-grid {
            display: grid;
            grid-template-columns: 32% 68%;
            gap: 32px;
            align-items: start;
        }
        .sidebar-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            position: sticky;
            top: 96px;
        }
        .sidebar-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-title i {
            color: var(--primary);
        }
        .side-list {
            list-style: none;
        }
        .side-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--subtext);
            transition: background .2s ease, color .2s ease;
            margin-bottom: 8px;
            background: var(--bg);
        }
        .side-list li i {
            color: var(--primary);
            font-size: 14px;
        }
        .side-list li:hover {
            background: rgba(46, 111, 242, 0.08);
            color: var(--primary);
        }
        .content-area {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }
        .content-block {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 32px;
            box-shadow: var(--shadow-card);
        }
        .content-block .block-img {
            border-radius: 16px;
            overflow: hidden;
            margin-bottom: 20px;
        }
        .content-block .block-img img {
            width: 100%;
            height: auto;
            max-height: 260px;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .content-block:hover .block-img img {
            transform: scale(1.02);
        }
        .block-title {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .block-title::before {
            content: '';
            display: block;
            width: 4px;
            height: 22px;
            border-radius: 4px;
            background: var(--primary);
        }
        .block-text p {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: var(--subtext);
            margin-bottom: 12px;
        }
        .block-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: 999px;
            margin-top: 4px;
        }

        /* ===== Highlight ===== */
        .highlight-section {
            background: #EAF1FD;
            padding: 72px 0;
        }
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .section-head .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(46, 111, 242, 0.1);
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            color: var(--deep);
            letter-spacing: -0.005em;
            line-height: 1.3;
        }
        .section-head p {
            margin-top: 12px;
            color: var(--subtext);
            font-size: 1rem;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 111, 242, 0.3);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(46, 111, 242, 0.1);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 16px;
            transition: background .3s ease, color .3s ease;
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9375rem;
            color: var(--subtext);
            line-height: 1.75;
        }

        /* ===== Process ===== */
        .process-section {
            padding: 72px 0;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 28px 20px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--deep);
            color: var(--aurora);
            font-family: 'Arial Narrow', 'DIN Alternate', sans-serif;
            font-feature-settings: 'tnum';
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .process-step h3 {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.875rem;
            color: var(--subtext);
            line-height: 1.75;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0;
            background: #fff;
        }
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }
        .faq-card:hover {
            border-color: rgba(46, 111, 242, 0.3);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color .2s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(46, 111, 242, 0.1);
            color: var(--primary);
            font-weight: 700;
            transition: all .3s ease;
            font-size: 12px;
        }
        .faq-card.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            display: block;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
            transition: max-height .3s ease, opacity .3s ease, padding .3s ease;
            padding: 0 24px;
            background: #F7FAFF;
            font-size: 0.9375rem;
            line-height: 1.75;
            color: var(--subtext);
        }
        .faq-card.open .faq-answer {
            max-height: 300px;
            opacity: 1;
            padding: 16px 24px;
        }

        /* ===== CTA ===== */
        .cta-banner {
            position: relative;
            padding: 72px 0;
            background: var(--deep);
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: 50%;
            right: -80px;
            transform: translateY(-50%);
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 60px solid rgba(60, 240, 197, 0.15);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: clamp(1.625rem, 4vw, 2.25rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .cta-inner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            transition: all .25s ease;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(46, 111, 242, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .btn-aurora {
            background: var(--aurora);
            color: var(--deep);
            border: 2px solid var(--aurora);
        }
        .btn-aurora:hover {
            filter: brightness(1.05);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(60, 240, 197, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--deep);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand p {
            font-size: 0.9375rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.75;
            margin: 16px 0;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, 0.7);
            transition: all .25s ease;
            font-size: 15px;
        }
        .footer-social a:hover {
            background: var(--aurora);
            border-color: var(--aurora);
            color: var(--deep);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.8);
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--aurora);
        }
        .footer-col p {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 8px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 8px;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .dual-grid {
                grid-template-columns: 1fr;
            }
            .sidebar-card {
                position: static;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-hero .hero-inner {
                flex-direction: column;
            }
            .cat-hero .hero-visual {
                flex: 1 1 auto;
                width: 100%;
            }
        }
        @media (max-width: 768px) {
            .nav-list,
            .nav-cta-desktop {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .cat-hero {
                padding: 56px 0 48px;
            }
            .cat-hero .hero-visual img {
                height: 200px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-btns {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .content-block {
                padding: 24px 20px;
            }
            .header-inner {
                height: 64px;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .hero-cat-sub {
                font-size: 1rem;
            }
        }