:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0b4a6b;
    --color-primary-darker: #062b3a;
    --color-accent: #22c55e;
    --color-accent-dark: #16a34a;
    --color-success: #16a34a;
    --color-danger: #ef4444;

    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-soft: #fff7e6;
    --color-bg-muted: #f5f7fb;
    --color-border: #e2e8f0;
    --color-border-soft: #edf2f7;

    --gradient-hero: linear-gradient(135deg, #062b3a 0%, #0ea5e9 100%);
    --gradient-deep: linear-gradient(135deg, #031a24 0%, #062b3a 100%);
    --gradient-dept: linear-gradient(135deg, #14532d 0%, #16a34a 100%);
    --gradient-security: linear-gradient(135deg, #062b3a, #0f172a);
    --gradient-mission: linear-gradient(135deg, #0ea5e9, #14532d);
    --gradient-trust: linear-gradient(135deg, #0f172a, #062b3a);
    --gradient-cta: linear-gradient(135deg, #14532d 0%, #0ea5e9 100%);
    --gradient-accent: linear-gradient(135deg, #22c55e, #16a34a);
    --gradient-icon: linear-gradient(135deg, #0ea5e9, #22c55e);

    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(15, 23, 42, 0.12);
    --glass-blur: blur(8px);

    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --shadow-xl: none;
    --shadow-primary: none;
    --shadow-accent: none;

    --radius-sm: 4px;
    --radius-md: 2px;
    --radius-lg: 4px;
    --radius-pill: 22px;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;

    --transition-fast: 0.18s cubic-bezier(.2,.8,.2,1);
    --transition-base: 0.24s cubic-bezier(.2,.8,.2,1);
    --transition-slow: 0.32s cubic-bezier(.2,.8,.2,1);
}

:where(body) {
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

:where(img) {
    max-width: 100%;
    height: auto;
}

.bg-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.icon-circle {
    width: 60px;
    height: 60px;
    background: var(--gradient-icon);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.header {
    background: #ffffff;
    z-index: 1030;
    box-shadow: none;
}

.header .navbar-brand img {
    transition: transform var(--transition-fast);
}

.header .navbar-brand:hover img {
    transform: scale(1.03);
}

.header .nav-link {
    font-weight: 500;
    color: var(--color-text);
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

.hero-section {
    min-height: 480px;
    background: var(--gradient-hero);
    color: #ffffff;
    padding-block: var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.22);
    z-index: 0;
    pointer-events: none;
}

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

.hero-section h1 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    line-height: 1.2;
    text-shadow: 0 2px 0 rgba(2, 6, 23, 0.25);
}

.hero-section h2 {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    opacity: 0.95;
    margin-bottom: var(--space-md);

    font-weight: 600;
    text-shadow: 0 1px 0 rgba(2, 6, 23, 0.22);
}

.hero-section .lead {
    font-size: 1.1rem;
    max-width: 700px;
    margin-inline: auto;
    opacity: 0.98;
    text-shadow: 0 1px 0 rgba(2, 6, 23, 0.16);
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-block-start: var(--space-md);
}

.notice-bar {
    animation: noticeSlideIn 0.44s cubic-bezier(.2,.8,.2,1);
}

.notice-bar a {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.notice-bar a:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

@keyframes noticeSlideIn {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

.breadcrumb-nav {
    background: #ffffff;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.breadcrumb-nav .breadcrumb-item a {
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

.breadcrumb-nav .breadcrumb-item a:hover {
    color: var(--color-primary-dark) !important;
    opacity: 0.95;
}

.why-us-section {
    background: var(--color-bg-soft);
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.whyus-card {
    background: #ffffff;
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    height: 100%;
    box-shadow: none;
}

.whyus-card:hover {
    transform: translateY(-4px);
    box-shadow: none;
    border-color: rgba(14, 165, 233, 0.35);
    background: #ffffff;
}

.about-section {
    background: var(--gradient-deep);
    color: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.about-img-wrap {
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.about-img-wrap img {
    transition: transform var(--transition-slow), filter var(--transition-slow);
}

.about-img-wrap:hover img {
    transform: scale(1.04);
    filter: saturate(1.05) contrast(1.03);
}

.about-card {
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    box-shadow: none;
}

.about-card:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.10);
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.78) !important;
}

.departments-section {
    background: var(--gradient-dept);
    color: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.departments-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin-bottom: var(--space-sm);
    text-shadow: 0 2px 0 rgba(0, 0, 0, 0.18);
}

.departments-subtitle {
    font-size: 1.05rem;
    max-width: 800px;
    margin-inline: auto;
    color: rgba(255, 255, 255, 0.88);
}

.departments-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-block-start: var(--space-lg);
}

@media (min-width: 768px) {
    .departments-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.d-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    border: 1px solid rgba(15, 23, 42, 0.14);
    box-shadow: none;
}

.d-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: #0ea5e9;
    margin-bottom: var(--space-xs);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}

.d-num span {
    color: #0f172a;
    font-size: 1.1rem;
    margin-inline-start: var(--space-xs);
}

.d-image {
    margin-bottom: var(--space-sm);
}

.d-image img {
    width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid rgba(2, 6, 23, 0.08);
}

.security-section {
    background: var(--gradient-security);
    color: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.security-network {
    position: relative;
    max-width: 800px;
    margin: var(--space-xl) auto;
    min-height: 400px;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .security-network {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, auto);
    }

    .core-node        { grid-column: 2; grid-row: 2; }
    .node-top-left    { grid-column: 1; grid-row: 1; }
    .node-top-right   { grid-column: 3; grid-row: 1; }
    .node-bottom-left { grid-column: 1; grid-row: 3; }
    .node-bottom-right{ grid-column: 3; grid-row: 3; }
}

.core-node {
    background: var(--gradient-accent);
    border-radius: 50%;
    width: 140px;
    height: 140px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-inline: auto;
    color: #052e16;
    font-weight: 850;
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.node {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    text-align: center;
    color: #0f172a;
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    border: 1px solid rgba(15, 23, 42, 0.14);
    box-shadow: none;
}

.node:hover {
    transform: scale(1.04);
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(14, 165, 233, 0.42);
}

.node-title {
    font-weight: 750;
    color: #0ea5e9;
    margin-block: var(--space-xs);
}

@media (max-width: 767.98px) {
    .core-node { width: 120px; height: 120px; }
}

.honor-section {
    background: #fffdf4;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.honor-row {
    padding-block: var(--space-sm);
}

.honor-text-card {
    padding: var(--space-md);
    background: #ffffff;
    border-radius: var(--radius-md);
    border-inline-start: 4px solid var(--color-primary);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
    box-shadow: none;
    border: 1px solid var(--color-border-soft);
}

.honor-text-card:hover {
    transform: translateY(-3px);
    box-shadow: none;
    border-color: rgba(34, 197, 94, 0.55);
}

.mission-section {
    background: var(--gradient-mission);
    padding-block: var(--space-2xl);
    color: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.mission-list li {
    margin-bottom: var(--space-sm);
    color: rgba(226, 232, 240, 0.92);
}

.stats-section {
    background: #ffffff;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.stats-card {
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    background: var(--color-bg-soft);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-md);
    box-shadow: none;
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: none;
    background: #ffffff;
    border-color: rgba(14, 165, 233, 0.35);
}

.stats-card h3 {
    font-variant-numeric: tabular-nums;
    color: #062b3a;
    text-shadow: none;
}

.news-section {
    background: var(--color-bg-soft);
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.news-card {
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-md);
    background: #ffffff;
    box-shadow: none;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: none;
    border-color: rgba(14, 165, 233, 0.38);
}

.news-img-wrap {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.news-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow), filter var(--transition-slow);
}

.news-card:hover .news-img-wrap img {
    transform: scale(1.06);
    filter: saturate(1.05) contrast(1.03);
}

.matches-section {
    background: #ffffff;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.match-card {
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-md);
    background: #ffffff;
    box-shadow: none;
}

.match-card:hover {
    transform: translateY(-3px);
    box-shadow: none;
    border-color: rgba(14, 165, 233, 0.55);
}

.match-card .team {
    min-width: 0;
}

.match-card .team .small {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.match-card .score {
    font-variant-numeric: tabular-nums;
    color: #052e16;
}

.trust-section {
    background: var(--gradient-trust);
    color: #ffffff;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.trust-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-sm);
    height: 100%;
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: none;
}

.trust-card:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(34, 197, 94, 0.45);
}

.partners-section {
    background: #fff7e6;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.partner-card {
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
    box-shadow: none;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: none;
    border-color: rgba(14, 165, 233, 0.45);
}

.testimonials-section {
    background: #ffffff;
    border-top: 1px solid var(--color-border-soft);
    border-bottom: 1px solid var(--color-border-soft);
}

.testimonial-card {
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    border-block-start: 4px solid transparent;
    box-shadow: none;
}

.testimonial-card:hover {
    border-block-start-color: #22c55e;
    transform: translateY(-5px);
    box-shadow: none;
}

.cta-banner-section {
    background: var(--gradient-cta);
    color: #fff;
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(226, 232, 240, 0.12);
    border-bottom: 1px solid rgba(226, 232, 240, 0.12);
}

.cta-banner-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.22);
    z-index: 0;
}

.cta-banner-section > .container {
    position: relative;
    z-index: 1;
}

.cta-banner-section .btn-warning {
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: #f59e0b;
    color: #042a1f;
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.88) !important;
}

.footer {
    font-size: 0.9rem;
    color: #94a3b8;
    background: transparent;
}

:root{
    --transition-fast: 160ms;
    --transition-medium: 240ms;

    --color-bg-muted: #F3F0E6;
    --color-border: #D7D2C6;

    --color-primary: #0F2D4A;
    --color-accent: #C2410C;

    --color-ink: #0B1220;
}

.footer a{
    transition: color var(--transition-fast) ease, border-color var(--transition-fast) ease, background-color var(--transition-fast) ease, text-decoration-color var(--transition-fast) ease;
}

.footer a:hover{
    color: var(--color-accent) !important;
    text-decoration-color: var(--color-accent) !important;
}

.footer-copyright{
    font-size: 0.85rem;
}

.footer-beian{
    font-size: 0.8rem;
    line-height: 1.8;
    opacity: 0.78;
    color: #374151;
}

.footer-beian a:hover{
    color: var(--color-accent) !important;
    text-decoration: underline !important;
}

.footer-beian img{
    margin-inline-end: 4px;
    transition: transform var(--transition-fast) cubic-bezier(.2,.8,.2,1);
    filter: saturate(.95) contrast(1.02);
    border-radius: 3px;
    outline: 1px solid rgba(17,24,39,.10);
    outline-offset: 1px;
}

.footer-beian a:hover img{
    transform: scale(1.2);
}

.footer-beian li{
    white-space: nowrap;
}

@media (max-width: 575.98px){
    .footer-beian ul{
        flex-direction: column;
        gap: var(--space-xs) !important;
    }

    .footer-beian li{
        white-space: normal;
        text-align: center;
    }
}

/* ============================================
   22. Form (Login/Signup/Contact)
   ============================================ */
.form-control:focus,
.form-select:focus{
    border-color: #0F2D4A;
    box-shadow: none;
    outline: 2px solid rgba(15,45,74,.16);
    outline-offset: 2px;
    transition: border-color var(--transition-medium) ease, outline-color var(--transition-medium) ease, outline-offset var(--transition-medium) ease;
}

.btn-primary{
    background-color: #0F2D4A;
    border-color: #0F2D4A;
    color: #FFFFFF;
    border-radius: 4px;
    box-shadow: none;
}

.btn-primary:hover,
.btn-primary:focus{
    background-color: #0B3A63;
    border-color: #0B3A63;
    color: #FFFFFF;
    box-shadow: none;
}

.input-group-text{
    background-color: #F6F1E6;
    border-color: #D6D0C2;
    color: #374151;
    border-radius: 4px;
    box-shadow: none;
}

/* ============================================
   23. Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce){
    *,
    *::before,
    *::after{
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================================
   Grid Layout Defaults (CSS-Variant-Ready)
   CSSVariantEngine sẽ override các rules này
   ============================================================ */

/* 新闻网格 (默认 3 列) */
.news-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 功能特性列表 (默认 3 列) */
.feature-list{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 用户评价 (默认 3 列) */
.testimonial-list{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 合作伙伴 (默认 4 列) */
.partner-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    align-items: center;
}

/* 数据统计 (默认 4 列) */
.stats-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: center;
}

/* FAQ 列表 (默认单列居中) */
.faq-list{
    max-width: 820px;
    margin: 0 auto;
}

/* Hero 内容 (默认居中) */
.hero-content{
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* Hero 分割布局 (左文右图) */
.hero-split{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}
.hero-split-text{
    color: #0B1220;
}
.hero-split-img{
    text-align: center;
}

/* CTA 内容 (默认居中) */
.cta-inner{
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* 作者团队 (默认 4 列) */
.authors-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* 联系渠道 (默认 3 列) */
.channels-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* 文章列表 (默认 2 列) */
.post-list-grid{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

/* 相关文章 (默认 3 列) */
.related-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

/* 赛事列表 (默认 3 列) */
.matches-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

/* 步 骤网格 (默认 4 列) */
.steps-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* 二维码网格 (默认 3 列) */
.qr-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    justify-items: center;
}

/* 荣誉列表 (默认 2 列交替) */
.honor-list{
    display: flex;
    flex-direction: column;
    gap: 3rem;
}
.honor-row{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}
.honor-row-reverse{
    direction: rtl;
}
.honor-row-reverse > *{
    direction: ltr;
}

/* ============================================================
   Responsive Defaults
   ============================================================ */
@media (max-width: 1024px){
    .news-grid,
    .feature-list,
    .channels-grid,
    .testimonial-list{
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .hero-split{
        grid-template-columns: 1fr;
    }
    .honor-row{
        grid-template-columns: 1fr;
    }
    .honor-row-reverse{
        direction: ltr;
    }
}

@media (max-width: 640px){
    .news-grid,
    .feature-list,
    .testimonial-list,
    .channels-grid,
    .post-list-grid,
    .related-grid,
    .authors-grid,
    .matches-grid{
        grid-template-columns: 1fr;
    }

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

    .steps-grid{
        grid-template-columns: 1fr;
    }
    .qr-grid{
        grid-template-columns: 1fr;
        max-width: 300px;
        margin: 0 auto;
    }

    .faq-list{
        max-width: 100%;
    }
}