/* roulang page: index */
:root {
    --base-dark: #0A1428;
    --base-darker: #060D1C;
    --primary: #1B6DF3;
    --primary-dark: #0E4FBF;
    --primary-light: #3D8BFF;
    --accent-cyan: #00E0FF;
    --accent-orange: #FF7A3C;
    --text-main: #F0F6FF;
    --text-secondary: #9DB4D9;
    --text-muted: #6B85A8;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 10px;
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
    --glow-blue: 0 0 20px rgba(27, 109, 243, 0.45);
    --glow-cyan: 0 0 12px rgba(0, 224, 255, 0.5);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: linear-gradient(180deg, #0A1428 0%, #0D1F3C 50%, #081020 100%);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }

.container-custom {
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header + Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 20, 40, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(27, 109, 243, 0.5), transparent);
}
.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, #1B6DF3, #00E0FF);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #fff;
    box-shadow: 0 0 16px rgba(27, 109, 243, 0.5);
}
.brand-name {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #FFFFFF 60%, #7FD8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    position: relative;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all 0.25s ease;
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}
.nav-link.active {
    color: var(--text-main);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--accent-cyan);
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(0, 224, 255, 0.7);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: linear-gradient(135deg, #1B6DF3, #0E4FBF);
    color: #fff;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    box-shadow: 0 0 20px rgba(27, 109, 243, 0.45);
    transition: all 0.25s ease;
    white-space: nowrap;
}
.btn-primary:hover {
    box-shadow: 0 0 30px rgba(27, 109, 243, 0.7);
    transform: translateY(-2px);
    color: #fff;
}
.btn-glass {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-main);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.25s ease;
    white-space: nowrap;
}
.btn-glass:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    color: #fff;
}
.more-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.25s ease;
}
.more-btn:hover {
    color: var(--text-main);
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
}
.more-btn.active {
    color: var(--accent-cyan);
    border-color: rgba(0, 224, 255, 0.4);
}
.more-btn i { font-size: 12px; transition: transform 0.25s ease; }
.more-btn.active i { transform: rotate(180deg); }
.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    color: #fff;
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.hamburger:hover { background: rgba(255, 255, 255, 0.12); }

/* Mega Panel */
.mega-wrap { position: relative; }
.mega-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 720px;
    background: rgba(13, 28, 52, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    padding: 28px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.25s ease;
    z-index: 200;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}
.mega-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.mega-panel::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 60px;
    width: 12px;
    height: 12px;
    background: rgba(13, 28, 52, 0.95);
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    transform: rotate(45deg);
}
.mega-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.mega-cat-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mega-cat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}
.mega-cat-item i {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(27, 109, 243, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--primary-light);
}
.mega-cat-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
}
.mega-news-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.mega-news-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}
.mega-news-item span:last-child {
    font-size: 12px;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-left: 16px;
}
.mega-news-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
}
.mega-footer {
    grid-column: 1 / -1;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.mega-footer-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    background: linear-gradient(135deg, rgba(27, 109, 243, 0.3), rgba(0, 224, 255, 0.2));
    border: 1px solid rgba(27, 109, 243, 0.4);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    transition: all 0.25s ease;
}
.mega-footer-link:hover {
    background: linear-gradient(135deg, rgba(27, 109, 243, 0.5), rgba(0, 224, 255, 0.3));
    border-color: rgba(27, 109, 243, 0.6);
    color: #fff;
}

/* Mobile Drawer */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: linear-gradient(180deg, #0A1428, #0D1F3C);
    z-index: 999;
    padding: 80px 30px 40px;
    transition: right 0.3s ease;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}
.mobile-drawer.open { right: 0; }
.mobile-drawer .close-drawer {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    color: #fff;
    font-size: 16px;
}
.mobile-drawer .drawer-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 10px;
}
.mobile-drawer .drawer-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 14px;
    border-radius: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    transition: background 0.2s;
}
.mobile-drawer .drawer-link:hover { background: rgba(255, 255, 255, 0.1); }
.drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.drawer-overlay.open { opacity: 1; visibility: visible; }

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    padding: 120px 0 80px;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 20, 40, 0.3) 0%, rgba(10, 20, 40, 0.7) 50%, #0A1428 100%),
                linear-gradient(90deg, rgba(10, 20, 40, 0.8) 0%, rgba(10, 20, 40, 0.4) 60%, rgba(10, 20, 40, 0.2) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}
.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(0, 224, 255, 0.1);
    border: 1px solid rgba(0, 224, 255, 0.3);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #FFFFFF 50%, #7FD8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero h1 .highlight {
    background: linear-gradient(135deg, #00E0FF, #3D8BFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 224, 255, 0.2);
}
.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 640px;
}
.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.hero-cta .btn-primary {
    padding: 14px 34px;
    font-size: 16px;
    border-radius: 12px;
}
.hero-cta .btn-glass {
    padding: 14px 34px;
    font-size: 16px;
    border-radius: 12px;
}
.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.hero-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.hero-stat .num {
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 0 12px rgba(0, 224, 255, 0.5);
}
.hero-stat .label {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== Section common ===== */
.section {
    padding: 100px 0;
}
.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 48px;
    gap: 30px;
}
.section-header .left { max-width: 600px; }
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    text-transform: uppercase;
    margin-bottom: 12px;
}
.section-tag::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--accent-cyan);
    display: inline-block;
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(0, 224, 255, 0.5);
}
.section-title {
    font-size: 38px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Services ===== */
.services-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 24px;
}
.service-main {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 36px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}
.service-main:hover {
    transform: translateY(-4px);
    border-color: rgba(27, 109, 243, 0.4);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.service-main .service-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, #1B6DF3, #00E0FF);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(27, 109, 243, 0.4);
}
.service-main h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}
.service-main p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}
.service-main .service-img {
    margin-top: 24px;
    border-radius: 12px;
    overflow: hidden;
    height: 180px;
    object-fit: cover;
    width: 100%;
}
.service-main .service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-light);
    transition: gap 0.2s ease;
    margin-top: 8px;
}
.service-main .service-link:hover { gap: 12px; color: var(--accent-cyan); }
.service-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    flex: 1;
}
.service-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(0, 224, 255, 0.3);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
}
.service-card .service-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(27, 109, 243, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-light);
    margin-bottom: 16px;
}
.service-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}
.service-card .service-card-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-light);
    margin-top: 16px;
    transition: gap 0.2s;
}
.service-card .service-card-footer:hover { gap: 12px; color: var(--accent-cyan); }

/* ===== Stats ===== */
.stats-section {
    position: relative;
    background: linear-gradient(180deg, rgba(27, 109, 243, 0.08), transparent);
}
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.stats-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: center;
}
.stat-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 32px;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, #1B6DF3, #00E0FF);
}
.stat-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.09);
    box-shadow: var(--shadow-card);
}
.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 0 12px rgba(0, 224, 255, 0.5);
    line-height: 1.1;
    margin-bottom: 8px;
}
.stat-number .unit { font-size: 22px; margin-left: 2px; }
.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}
.stat-trend {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 14px;
    color: var(--accent-cyan);
}
.stats-left {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ===== Cases ===== */
.cases-scroll {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding-bottom: 20px;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: rgba(27, 109, 243, 0.4) transparent;
}
.cases-scroll::-webkit-scrollbar { height: 6px; }
.cases-scroll::-webkit-scrollbar-track { background: transparent; }
.cases-scroll::-webkit-scrollbar-thumb { background: rgba(27, 109, 243, 0.4); border-radius: 3px; }
.case-card {
    flex: 0 0 340px;
    scroll-snap-align: start;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: all 0.3s ease;
    position: relative;
}
.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    border-color: rgba(27, 109, 243, 0.3);
}
.case-card:first-child {
    flex: 0 0 400px;
}
.case-card .case-img {
    height: 200px;
    object-fit: cover;
    width: 100%;
    transition: transform 0.4s ease;
}
.case-card:hover .case-img { transform: scale(1.04); }
.case-card .case-body {
    padding: 20px;
    position: relative;
}
.case-card .case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 224, 255, 0.12);
    border: 1px solid rgba(0, 224, 255, 0.3);
    border-radius: 999px;
    font-size: 12px;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 10px;
}
.case-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}
.case-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.case-nav {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}
.case-nav-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.25s ease;
}
.case-nav-btn:hover {
    background: rgba(27, 109, 243, 0.3);
    border-color: rgba(27, 109, 243, 0.6);
    box-shadow: 0 0 20px rgba(27, 109, 243, 0.4);
}

/* ===== Solution ===== */
.solution-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.solution-list {
    display: flex;
    flex-direction: column;
}
.solution-item {
    display: flex;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.25s ease;
}
.solution-item:last-child { border-bottom: none; }
.solution-item:hover { padding-left: 12px; }
.solution-item .num {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, #00E0FF, #1B6DF3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(0, 224, 255, 0.2);
    line-height: 1;
    min-width: 70px;
}
.solution-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}
.solution-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
.solution-item .arrow {
    margin-left: auto;
    display: flex;
    align-items: center;
    color: var(--text-muted);
    font-size: 18px;
    transition: all 0.2s ease;
}
.solution-item:hover .arrow {
    color: var(--accent-cyan);
    transform: translateX(4px);
}
.solution-panel {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 24px;
    position: relative;
}
.solution-panel img {
    border-radius: 12px;
    height: 420px;
    object-fit: cover;
    width: 100%;
}
.solution-panel::after {
    content: '';
    position: absolute;
    top: -10px;
    right: -10px;
    width: 60px;
    height: 60px;
    border-top: 2px solid var(--accent-cyan);
    border-right: 2px solid var(--accent-cyan);
    border-radius: 0 12px 0 0;
    opacity: 0.5;
}
.solution-panel::before {
    content: '';
    position: absolute;
    bottom: -10px;
    left: -10px;
    width: 60px;
    height: 60px;
    border-bottom: 2px solid var(--primary);
    border-left: 2px solid var(--primary);
    border-radius: 0 0 0 12px;
    opacity: 0.5;
}

/* ===== News ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.news-item {
    display: flex;
    gap: 20px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    transition: all 0.25s ease;
}
.news-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(27, 109, 243, 0.3);
    transform: translateY(-2px);
}
.news-thumb {
    width: 130px;
    height: 88px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
}
.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.news-item:hover .news-thumb img { transform: scale(1.05); }
.news-info { flex: 1; min-width: 0; }
.news-cat {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(27, 109, 243, 0.15);
    border: 1px solid rgba(27, 109, 243, 0.3);
    border-radius: 999px;
    font-size: 12px;
    color: var(--primary-light);
    margin-bottom: 6px;
}
.news-info h3 {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.news-info h3 a:hover { color: var(--accent-cyan); }
.news-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-muted);
}
.news-meta a {
    color: var(--primary-light);
    font-weight: 500;
}
.news-meta a:hover { color: var(--accent-cyan); }
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    border-radius: 16px;
}
.empty-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(27, 109, 243, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-light);
    margin: 0 auto 16px;
}
.empty-state p {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}
.empty-state span {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.faq-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.faq-item.open {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(27, 109, 243, 0.3);
}
.faq-question {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    transition: color 0.2s;
}
.faq-question:hover { color: var(--accent-cyan); }
.faq-question .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(27, 109, 243, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--primary-light);
    flex-shrink: 0;
    transition: all 0.3s ease;
}
.faq-item.open .faq-icon {
    background: rgba(27, 109, 243, 0.3);
    transform: rotate(45deg);
    color: #fff;
}
.faq-question .faq-arrow {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 14px;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--accent-cyan); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.faq-answer-inner {
    padding: 0 24px 22px 68px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; }

/* ===== CTA ===== */
.cta-section {
    position: relative;
}
.cta-wrapper {
    background: linear-gradient(135deg, rgba(27, 109, 243, 0.4), rgba(0, 112, 224, 0.3), rgba(0, 224, 255, 0.2));
    border: 1px solid rgba(27, 109, 243, 0.3);
    border-radius: 20px;
    padding: 60px;
    position: relative;
    overflow: hidden;
}
.cta-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 224, 255, 0.2), transparent 70%);
    pointer-events: none;
}
.cta-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    position: relative;
    z-index: 2;
}
.cta-left h2 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
}
.cta-left p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 28px;
}
.cta-left .btn-primary {
    background: linear-gradient(135deg, #FF7A3C, #E85D1A);
    box-shadow: 0 0 25px rgba(255, 122, 60, 0.4);
    font-size: 16px;
    padding: 14px 32px;
}
.cta-left .btn-primary:hover {
    box-shadow: 0 0 35px rgba(255, 122, 60, 0.6);
}
.cta-form {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: 30px;
    backdrop-filter: blur(10px);
}
.cta-form .form-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    color: #fff;
    font-size: 15px;
    transition: all 0.2s ease;
    outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(27, 109, 243, 0.2);
}
.form-group textarea {
    resize: vertical;
    min-height: 90px;
}
.form-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #1B6DF3, #0E4FBF);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 0 20px rgba(27, 109, 243, 0.45);
    transition: all 0.25s ease;
}
.form-submit:hover {
    box-shadow: 0 0 30px rgba(27, 109, 243, 0.7);
    transform: translateY(-2px);
}
.form-agree {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
    line-height: 1.5;
}

/* ===== Footer ===== */
.site-footer {
    background: #060D1C;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 60px 0 0;
    margin-top: 40px;
    position: relative;
}
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 224, 255, 0.5), transparent);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand .brand {
    margin-bottom: 16px;
}
.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
    max-width: 300px;
}
.footer-social {
    display: flex;
    gap: 10px;
}
.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    color: var(--text-secondary);
    transition: all 0.25s ease;
}
.footer-social a:hover {
    background: rgba(27, 109, 243, 0.2);
    color: var(--accent-cyan);
    border-color: rgba(27, 109, 243, 0.4);
}
.footer-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text-main);
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s;
}
.footer-links a:hover {
    color: var(--accent-cyan);
}
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}
.footer-contact-item i {
    color: var(--primary-light);
    margin-top: 4px;
    font-size: 14px;
    min-width: 16px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--accent-cyan); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: 1fr; }
    .stats-layout { grid-template-columns: 1fr; gap: 40px; }
    .solution-layout { grid-template-columns: 1fr; gap: 40px; }
    .cta-layout { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 44px; }
    .mega-panel { width: 560px; }
}
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-title { font-size: 28px; }
    .main-nav { display: none; }
    .more-btn { display: none; }
    .hamburger { display: flex; }
    .nav-actions .btn-primary { display: none; }
    .hero { padding: 100px 0 60px; }
    .hero h1 { font-size: 34px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { gap: 20px; }
    .stats-grid { grid-template-columns: 1fr; }
    .news-item { flex-direction: column; }
    .news-thumb { width: 100%; height: 140px; }
    .mega-panel { display: none; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .cta-wrapper { padding: 32px 20px; }
    .case-card:first-child { flex: 0 0 300px; }
    .case-card { flex: 0 0 280px; }
}
@media (max-width: 520px) {
    .container-custom { padding: 0 16px; }
    .hero h1 { font-size: 28px; }
    .hero-cta .btn-primary,
    .hero-cta .btn-glass { width: 100%; justify-content: center; }
    .faq-question { font-size: 14px; padding: 16px; }
    .faq-answer-inner { padding-left: 16px; }
    .section-title { font-size: 24px; }
    .stat-number { font-size: 36px; }
}

/* roulang page: category1 */
:root {
            --bg-deep: #0A1428;
            --bg-dark: #0D1F3C;
            --color-primary: #1B6DF3;
            --color-primary-dark: #0E4FBF;
            --color-primary-light: #3D8BFF;
            --color-cyan: #00E0FF;
            --color-orange: #FF7A3C;
            --text-main: #F0F6FF;
            --text-secondary: #9DB4D9;
            --text-muted: #6B85A8;
            --border-light: rgba(255,255,255,0.12);
            --glass-bg: rgba(255,255,255,0.07);
            --glass-bg-hover: rgba(255,255,255,0.12);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 40px rgba(0,0,0,0.35);
            --shadow-glow: 0 0 20px rgba(27,109,243,0.45);
            --transition-fast: all 0.2s ease;
            --transition-normal: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: linear-gradient(150deg, #070E1E 0%, #0A1428 35%, #0D1F3C 100%);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-fast);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
            border: none;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (min-width: 1280px) {
            .container-custom {
                max-width: 1320px;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 20, 40, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 224, 255, 0.15);
            transition: var(--transition-normal);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
            border-radius: 10px;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 224, 255, 0.3);
        }
        .brand-name {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, #FFFFFF 60%, #7FD8FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 34px;
            margin-left: 40px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 4px;
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--color-cyan);
            box-shadow: 0 0 10px rgba(0, 224, 255, 0.6);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .nav-cta {
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(27, 109, 243, 0.35);
            transition: var(--transition-normal);
        }
        .nav-cta:hover {
            box-shadow: 0 0 28px rgba(27, 109, 243, 0.65);
            transform: translateY(-2px);
        }
        .mobile-toggle {
            display: none;
            font-size: 22px;
            color: #fff;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: rgba(255,255,255,0.08);
        }

        /* Mega Panel */
        .mega-panel {
            position: fixed;
            top: 73px;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            width: 720px;
            background: rgba(13, 31, 60, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: 16px;
            padding: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.25s ease, transform 0.25s ease;
            z-index: 999;
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr 1fr 220px;
            gap: 28px;
        }
        .mega-panel.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
            pointer-events: auto;
        }
        .mega-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }
        .mega-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-fast);
        }
        .mega-link:hover {
            background: rgba(255,255,255,0.08);
            color: #fff;
        }
        .mega-link i {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(27,109,243,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--color-cyan);
        }
        .mega-item {
            display: block;
            padding: 10px 12px;
            border-radius: 10px;
            transition: var(--transition-fast);
        }
        .mega-item:hover {
            background: rgba(255,255,255,0.08);
        }
        .mega-item-title {
            display: block;
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 2px;
        }
        .mega-item-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .mega-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(27,109,243,0.4), rgba(0,224,255,0.25));
            border: 1px solid rgba(0,224,255,0.3);
            border-radius: 14px;
            padding: 20px;
            text-align: center;
        }
        .mega-cta a {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            display: inline-flex;
            gap: 6px;
            align-items: center;
        }
        .mega-cta a:hover {
            color: var(--color-cyan);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            padding: 130px 0 80px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,20,40,0.65) 0%, rgba(10,20,40,0.75) 50%, #0A1428 100%);
        }
        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10,20,40,0.85) 0%, rgba(10,20,40,0.35) 60%, rgba(10,20,40,0.15) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(0,224,255,0.3);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 13px;
            color: var(--color-cyan);
            backdrop-filter: blur(8px);
            margin-bottom: 22px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: 1px;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 55%, #7FD8FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero h1 .highlight {
            color: var(--color-cyan);
            -webkit-text-fill-color: var(--color-cyan);
            text-shadow: 0 0 20px rgba(0,224,255,0.4);
        }
        .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 600px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 28px;
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-glow);
            transition: var(--transition-normal);
        }
        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(27,109,243,0.7);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.25);
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            padding: 12px 26px;
            border-radius: var(--radius-pill);
            backdrop-filter: blur(10px);
            transition: var(--transition-normal);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(0,224,255,0.5);
            transform: translateY(-2px);
        }
        .hero-metrics {
            display: flex;
            gap: 36px;
            margin-top: 42px;
            flex-wrap: wrap;
        }
        .hero-metric {
            display: flex;
            flex-direction: column;
        }
        .hero-metric strong {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-metric strong span {
            color: var(--color-cyan);
            text-shadow: 0 0 12px rgba(0,224,255,0.5);
        }
        .hero-metric small {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* ===== Section common ===== */
        .section {
            padding: 100px 0;
        }
        .section-head {
            margin-bottom: 52px;
            max-width: 640px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.5px;
            color: var(--color-cyan);
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .section-tag::before {
            content: "";
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0,224,255,0.6);
        }
        .section-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .intro-text .section-title {
            margin-bottom: 20px;
        }
        .intro-text p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro-points {
            margin-top: 28px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .intro-point {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: var(--text-main);
        }
        .intro-point i {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0,224,255,0.12);
            color: var(--color-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }
        .intro-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }
        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .intro-image:hover img {
            transform: scale(1.04);
        }
        .intro-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(200deg, rgba(27,109,243,0.15), transparent 50%);
            pointer-events: none;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 24px;
        }
        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            backdrop-filter: blur(14px);
            transition: var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-4px);
            border-color: rgba(0,224,255,0.3);
        }
        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
            opacity: 0.5;
            transition: var(--transition-normal);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(27,109,243,0.3), rgba(0,224,255,0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-cyan);
            margin-bottom: 20px;
            box-shadow: 0 0 16px rgba(27,109,243,0.25);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .feature-card.feature-main {
            background: linear-gradient(150deg, rgba(27,109,243,0.18), rgba(0,224,255,0.06));
            border-color: rgba(0,224,255,0.25);
        }
        .feature-card.feature-main .feature-icon {
            background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
            color: #fff;
            box-shadow: 0 0 24px rgba(27,109,243,0.4);
        }

        /* ===== Topics ===== */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .topic-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-normal);
        }
        .topic-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0,224,255,0.3);
            box-shadow: var(--shadow-card);
        }
        .topic-cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .topic-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .topic-card:hover .topic-cover img {
            transform: scale(1.06);
        }
        .topic-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10,20,40,0.7));
        }
        .topic-body {
            padding: 24px;
        }
        .topic-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .topic-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .topic-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-fast);
        }
        .topic-link:hover {
            gap: 10px;
            color: #fff;
        }

        /* ===== Recommend ===== */
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .rec-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            overflow: hidden;
            transition: var(--transition-normal);
            display: flex;
            flex-direction: column;
        }
        .rec-card:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-4px);
            border-color: rgba(0,224,255,0.25);
        }
        .rec-cover {
            height: 150px;
            overflow: hidden;
            position: relative;
        }
        .rec-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .rec-card:hover .rec-cover img {
            transform: scale(1.05);
        }
        .rec-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(10,20,40,0.5));
        }
        .rec-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .rec-tag {
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            background: rgba(27,109,243,0.2);
            border: 1px solid rgba(27,109,243,0.3);
            color: var(--color-primary-light);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
        }
        .rec-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
        }
        .rec-body p {
            font-size: 14px;
            color: var(--text-secondary);
            flex: 1;
        }
        .rec-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .rec-footer a {
            font-weight: 600;
            color: var(--color-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .rec-footer a:hover {
            gap: 8px;
            color: #fff;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-normal);
        }
        .faq-item.active {
            background: rgba(255,255,255,0.12);
            border-color: rgba(0,224,255,0.25);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: var(--transition-fast);
        }
        .faq-question:hover {
            color: #fff;
        }
        .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 6px;
            background: rgba(0,224,255,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--color-cyan);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-arrow {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px 62px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 30px 0 90px;
        }
        .cta-banner {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            background: linear-gradient(120deg, #0E4FBF, #0A3A8C, #0D2B5E);
            border: 1px solid rgba(0,224,255,0.3);
            padding: 56px 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
            box-shadow: var(--shadow-card);
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(0,224,255,0.25), transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 520px;
        }
        .cta-content h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .cta-content p {
            font-size: 16px;
            color: rgba(240,246,255,0.85);
            line-height: 1.7;
        }
        .cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .cta-btn-orange {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--color-orange), #FF9A5C);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            padding: 14px 30px;
            border-radius: var(--radius-pill);
            box-shadow: 0 0 20px rgba(255,122,60,0.35);
            transition: var(--transition-normal);
            justify-content: center;
        }
        .cta-btn-orange:hover {
            box-shadow: 0 0 30px rgba(255,122,60,0.6);
            transform: translateY(-2px);
        }
        .cta-btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.3);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            transition: var(--transition-normal);
            justify-content: center;
        }
        .cta-btn-ghost:hover {
            background: rgba(255,255,255,0.18);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060D1C;
            border-top: 1px solid rgba(0,224,255,0.15);
            padding-top: 64px;
        }
        .site-footer::before {
            content: "";
            display: block;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0,224,255,0.4), transparent);
            margin-bottom: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .brand {
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            transition: var(--transition-normal);
        }
        .footer-social a:hover {
            background: rgba(27,109,243,0.3);
            color: #fff;
            border-color: rgba(27,109,243,0.5);
            transform: translateY(-2px);
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-cyan);
            padding-left: 4px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .footer-contact-item i {
            width: 22px;
            color: var(--color-cyan);
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-cyan);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 44px;
            }
            .section {
                padding: 80px 0;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-card.feature-main {
                grid-column: span 2;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .mega-panel {
                width: calc(100% - 48px);
                left: 24px;
                transform: translateX(0) translateY(8px);
                grid-template-columns: 1fr 1fr;
            }
            .mega-panel.show {
                transform: translateX(0) translateY(0);
            }
        }
        @media (max-width: 767px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .site-header .container-custom {
                padding: 0 16px;
            }
            .header-inner {
                height: 62px;
            }
            .brand-name {
                font-size: 17px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .main-nav {
                position: fixed;
                top: 62px;
                left: 0;
                width: 100%;
                background: rgba(10,20,40,0.96);
                backdrop-filter: blur(20px);
                padding: 16px;
                flex-direction: column;
                gap: 0;
                margin: 0;
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                border-bottom: 1px solid var(--border-light);
                z-index: 998;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav .nav-link {
                display: block;
                padding: 14px 12px;
                font-size: 18px;
                border-radius: 8px;
                width: 100%;
            }
            .main-nav .nav-link.active {
                background: rgba(27,109,243,0.2);
                color: #fff;
            }
            .main-nav .nav-link.active::after {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .mega-panel {
                display: none;
            }
            .hero {
                min-height: auto;
                padding: 110px 0 60px;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-outline {
                justify-content: center;
                width: 100%;
            }
            .hero-metrics {
                gap: 20px;
                margin-top: 30px;
            }
            .hero-metric strong {
                font-size: 24px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .section-sub {
                font-size: 15px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card.feature-main {
                grid-column: auto;
            }
            .topics-grid {
                grid-template-columns: 1fr;
            }
            .rec-grid {
                grid-template-columns: 1fr;
            }
            .faq-question {
                padding: 16px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding-left: 16px;
            }
            .cta-banner {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-actions {
                width: 100%;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 30px;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-btn-orange,
            .cta-btn-ghost {
                width: 100%;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.6s ease both;
        }
        .delay-1 {
            animation-delay: 0.15s;
        }
        .delay-2 {
            animation-delay: 0.3s;
        }

/* roulang page: article */
:root {
    --bg-deep: #0A1428;
    --bg-dark: #0D1F3C;
    --primary: #1B6DF3;
    --primary-dark: #0E4FBF;
    --primary-light: #3D8BFF;
    --accent: #00E0FF;
    --energy: #FF7A3C;
    --text-main: #F0F6FF;
    --text-secondary: #9DB4D9;
    --text-muted: #6B85A8;
    --border-glass: rgba(255, 255, 255, 0.12);
    --radius-card: 16px;
    --radius-medium: 12px;
    --radius-btn: 10px;
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
    --transition-base: all 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(160deg, #0A1428 0%, #0D1F3C 50%, #0A1428 100%);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

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

@media (min-width: 1280px) {
    .container-custom {
        max-width: 1320px;
    }
}

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 20, 40, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -1px;
    transform: translateX(-50%);
    width: 70%;
    max-width: 640px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(27, 109, 243, 0.6), rgba(0, 224, 255, 0.5), transparent);
}

.header-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 74px;
}

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

.brand-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 0 18px rgba(0, 224, 255, 0.3);
}

.brand-text {
    font-size: 21px;
    font-weight: 800;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #FFFFFF 65%, #7FD8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

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

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-base);
    position: relative;
}

.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
    color: #fff;
    background: rgba(27, 109, 243, 0.15);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary-light);
    box-shadow: 0 0 10px rgba(61, 139, 255, 0.6);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    border-radius: var(--radius-btn);
    padding: 12px 26px;
    transition: var(--transition-base);
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 0 20px rgba(27, 109, 243, 0.45);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(27, 109, 243, 0.7);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-glass);
    color: var(--text-main);
    backdrop-filter: blur(8px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 9px 20px;
    font-size: 14px;
    border-radius: 8px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.mobile-toggle .bar {
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-main);
    transition: var(--transition-base);
}

/* ===== Mobile Menu ===== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(10, 20, 40, 0.96);
    backdrop-filter: blur(20px);
    padding: 24px;
    z-index: 99;
    border-bottom: 1px solid var(--border-glass);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.45);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu a {
    display: block;
    padding: 14px 16px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: 12px;
    margin-bottom: 8px;
    transition: var(--transition-base);
}

.mobile-menu a:hover {
    background: rgba(27, 109, 243, 0.12);
    color: #fff;
}

.mobile-menu .btn {
    margin-top: 12px;
}

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    padding: 72px 0 80px;
    overflow: hidden;
}

.hero-bg-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 20, 40, 0.55) 0%, rgba(10, 20, 40, 0.85) 70%, #0A1428 100%);
    z-index: 1;
}

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

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

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

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

.breadcrumb i {
    font-size: 11px;
    color: var(--text-muted);
}

.breadcrumb .bc-current {
    color: var(--text-main);
    max-width: 380px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-hero-title {
    font-size: clamp(28px, 5vw, 52px);
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 22px;
    max-width: 900px;
    background: linear-gradient(135deg, #FFFFFF 60%, #7FD8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-hero-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
}

.hero-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 14px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.06);
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-meta-item i {
    color: var(--accent);
    font-size: 13px;
}

/* ===== Article Main ===== */
.article-main {
    padding: 0 0 80px;
    position: relative;
    z-index: 5;
}

.article-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    margin-bottom: 48px;
}

.article-cover {
    position: relative;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 7;
    overflow: hidden;
}

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

.article-cover:hover img {
    transform: scale(1.02);
}

.article-body {
    padding: 40px;
}

.article-body p {
    font-size: 17px;
    line-height: 1.85;
    color: #C9D8F0;
    margin-bottom: 20px;
}

.article-body h2 {
    font-size: clamp(22px, 3vw, 28px);
    font-weight: 700;
    color: #fff;
    margin: 40px 0 20px;
    border-left: 4px solid var(--primary);
    padding-left: 16px;
    line-height: 1.4;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin: 32px 0 14px;
    line-height: 1.5;
}

.article-body blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(0, 224, 255, 0.05);
    padding: 18px 24px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: var(--text-secondary);
    font-size: 16px;
}

.article-body ul,
.article-body ol {
    padding-left: 24px;
    margin-bottom: 20px;
    color: #C9D8F0;
}

.article-body ul {
    list-style: disc;
}

.article-body ol {
    list-style: decimal;
}

.article-body li {
    margin-bottom: 8px;
    line-height: 1.7;
}

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

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.article-body a:hover {
    color: #fff;
}

.article-body strong {
    color: #fff;
    font-weight: 600;
}

/* ===== Tags ===== */
.article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0 40px 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tags-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-right: 4px;
}

.tag-btn {
    display: inline-block;
    padding: 7px 15px;
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 999px;
    transition: var(--transition-base);
}

.tag-btn:hover {
    background: rgba(27, 109, 243, 0.15);
    border-color: rgba(61, 139, 255, 0.5);
    color: #fff;
}

/* ===== Pagination ===== */
.article-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 32px 40px;
}

.paginate-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 20px;
    border-radius: var(--radius-medium);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition-base);
}

.paginate-card:hover {
    background: rgba(27, 109, 243, 0.08);
    border-color: rgba(61, 139, 255, 0.35);
    transform: translateY(-2px);
}

.paginate-next {
    text-align: right;
}

.paginate-label {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.paginate-next .paginate-label {
    justify-content: flex-end;
}

.paginate-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
}

.btn-back-list {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 22px;
    border-radius: var(--radius-btn);
    border: 1px solid var(--border-glass);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-back-list:hover {
    border-color: rgba(0, 224, 255, 0.5);
    color: #fff;
    box-shadow: 0 0 16px rgba(0, 224, 255, 0.2);
}

/* ===== Related ===== */
.related-section {
    margin-top: 16px;
}

.section-head {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 28px;
}

.section-title {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: #fff;
    position: relative;
    padding-left: 18px;
}

.section-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 4px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
}

.section-sub {
    font-size: 15px;
    color: var(--text-secondary);
}

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

.related-card {
    display: flex;
    gap: 16px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: var(--transition-base);
    align-items: center;
}

.related-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(61, 139, 255, 0.4);
    transform: translateY(-2px);
}

.related-card img {
    width: 96px;
    height: 72px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
}

.related-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-info span {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Empty State ===== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    backdrop-filter: blur(14px);
}

.empty-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(27, 109, 243, 0.2), rgba(0, 224, 255, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 24px;
}

.empty-state h2 {
    font-size: 26px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ===== CTA Band ===== */
.cta-band {
    position: relative;
    padding: 90px 0;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 20, 40, 0.92) 10%, rgba(13, 31, 60, 0.78) 60%, rgba(10, 20, 40, 0.88) 100%);
}

.cta-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 48px 52px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(27, 109, 243, 0.15), rgba(0, 224, 255, 0.08));
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(16px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.cta-left h2 {
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.3;
}

.cta-left p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 520px;
}

.cta-right {
    display: flex;
    gap: 14px;
    flex-shrink: 0;
}

/* ===== Footer ===== */
.site-footer {
    background: #060D1C;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 64px;
    margin-top: 40px;
}

.site-footer .container-custom {
    position: relative;
}

.site-footer .container-custom::before {
    content: "";
    position: absolute;
    left: 24px;
    right: 24px;
    top: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(27, 109, 243, 0.8), rgba(0, 224, 255, 0.6), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.9fr 1.1fr;
    gap: 40px;
    padding-bottom: 48px;
}

.footer-brand {
    max-width: 340px;
}

.footer-brand .brand {
    margin-bottom: 16px;
}

.brand-name {
    font-size: 21px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, #fff 65%, #7FD8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    font-size: 15px;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: rgba(27, 109, 243, 0.2);
    border-color: rgba(61, 139, 255, 0.5);
    color: #fff;
    transform: translateY(-2px);
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-contact-item i {
    width: 20px;
    text-align: center;
    color: var(--accent);
    font-size: 13px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .main-nav {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .header-wrap {
        height: 64px;
    }

    .mobile-menu {
        top: 64px;
    }

    .article-hero {
        padding: 56px 0 64px;
    }

    .article-body {
        padding: 28px;
    }

    .article-tags {
        padding: 0 28px 24px;
    }

    .article-pagination {
        padding: 24px 28px;
        flex-wrap: wrap;
    }

    .paginate-card {
        flex: 1 1 calc(50% - 16px);
    }

    .btn-back-list {
        order: -1;
        width: 100%;
        justify-content: center;
    }

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

    .cta-inner {
        flex-direction: column;
        padding: 36px 32px;
        text-align: center;
        align-items: center;
    }

    .cta-left p {
        margin: 0 auto;
    }

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

@media (max-width: 767px) {
    .container-custom {
        padding: 0 18px;
    }

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

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

    .article-hero-title {
        font-size: 28px;
    }

    .article-hero-meta {
        gap: 10px;
    }

    .hero-meta-item {
        font-size: 13px;
        padding: 6px 12px;
    }

    .article-body {
        padding: 20px;
    }

    .article-body p {
        font-size: 16px;
        line-height: 1.8;
    }

    .article-cover {
        aspect-ratio: 16 / 9;
    }

    .article-tags {
        padding: 0 20px 20px;
    }

    .article-pagination {
        padding: 20px;
        flex-direction: column;
        gap: 12px;
    }

    .paginate-card {
        flex: 1 1 auto;
        width: 100%;
    }

    .btn-back-list {
        width: 100%;
        order: 0;
    }

    .paginate-next {
        text-align: left;
    }

    .paginate-next .paginate-label {
        justify-content: flex-start;
    }

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

    .related-card {
        align-items: flex-start;
    }

    .related-card img {
        width: 84px;
        height: 64px;
    }

    .section-title {
        font-size: 22px;
    }

    .cta-inner {
        padding: 28px 20px;
    }

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

    .cta-right .btn {
        width: 100%;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 4px;
    }

    .breadcrumb {
        font-size: 13px;
        gap: 6px;
    }

    .breadcrumb .bc-current {
        max-width: 180px;
    }
}