:root{
    --color-primary:#00a3ff;
    --color-primary-dark:#004a7a;
    --color-primary-darker:#022b44;
    --color-accent:#ff4d6d;
    --color-accent-dark:#e11d48;
    --color-success:#10b981;
    --color-danger:#ef4444;

    --color-text:#243447;
    --color-text-muted:#5b6b7d;
    --color-text-light:#7c8ea3;
    --color-bg:#f7fbff;
    --color-bg-soft:#eef6ff;
    --color-bg-muted:#e8f1ff;
    --color-border:#d6e6ff;
    --color-border-soft:#cfe2ff;

    --gradient-hero: #0b3a66;
    --gradient-deep: #031b2f;
    --gradient-dept: #14234b;
    --gradient-security: #0a2239;
    --gradient-mission: #0a2a52;
    --gradient-trust: #071a2d;
    --gradient-cta: #09355b;
    --gradient-accent: #ff4d6d;
    --gradient-icon: #00a3ff;

    --glass-bg: rgba(255,255,255,0.10);
    --glass-border: rgba(0,163,255,0.22);
    --glass-blur: blur(8px);

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

    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-pill: 24px;

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

    --transition-fast: 160ms cubic-bezier(.2,.8,.2,1);
    --transition-base: 220ms cubic-bezier(.2,.8,.2,1);
    --transition-slow: 420ms 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:#062238;
    font-size:1.5rem;
    flex-shrink:0;
    border: 1px solid rgba(0,163,255,0.35);
}

.header{
    background:#ffffff;
    z-index:1030;
    border-bottom:1px solid rgba(0,163,255,0.18);
}

.header .navbar-brand img{
    transition: transform var(--transition-fast);
    filter:saturate(1.05);
}

.header .navbar-brand:hover img{
    transform:scale(1.05);
}

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

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

.hero-section{
    min-height:480px;
    background: #0b3a66;
    color:#ffffff;
    padding-block: var(--space-2xl);
    position:relative;
    overflow:hidden;
    border-bottom:1px solid rgba(0,163,255,0.18);
}

.hero-section::before{
    content:'';
    position:absolute;
    inset:0;
    background: rgba(2,43,68,0.55);
    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 1px 0 rgba(0,0,0,0.15);
}

.hero-section h2{
    font-size:clamp(1.1rem,2vw,1.4rem);
    opacity:0.92;
    margin-bottom:var(--space-md);
    font-weight:500;
    color: rgba(255,255,255,0.95);
    text-shadow: 0 1px 0 rgba(0,0,0,0.12);
}

.hero-section .lead{
    font-size:1.1rem;
    max-width:700px;
    margin-inline:auto;
    opacity:0.98;
    color: rgba(255,255,255,0.92);
}

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

.notice-bar{
    animation: noticeSlideIn 420ms cubic-bezier(.2,.8,.2,1);
}

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

.notice-bar a:hover{
    opacity:0.85;
}

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

.breadcrumb-nav{
    background: var(--color-bg-muted);
    border-top:1px solid rgba(0,163,255,0.10);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

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

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

.why-us-section{
    background: var(--color-bg-soft);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

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

.whyus-card:hover{
    transform: translateY(-2px);
    box-shadow:none;
    border-color: rgba(0,163,255,0.35);
}

.about-section{
    background: #031b2f;
    color:#ffffff;
    border-bottom:1px solid rgba(255,77,109,0.18);
}

.about-img-wrap{
    overflow:hidden;
    border-radius: var(--radius-lg);
    border:1px solid rgba(255,255,255,0.18);
}

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

.about-img-wrap:hover img{
    transform: scale(1.04);
}

.about-card{
    transition: all var(--transition-base);
    border:1px solid rgba(255,255,255,0.10);
}

.about-card:hover{
    transform: translateY(-2px);
    background: rgba(255,255,255,0.10);
    border-color: rgba(255,77,109,0.25);
}

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

.departments-section{
    background:#14234b;
    color:#ffffff;
    border-bottom:1px solid rgba(0,163,255,0.16);
}

.departments-title{
    font-size:clamp(1.6rem,3vw,2.2rem);
    font-weight:700;
    margin-bottom:var(--space-sm);
    text-shadow: 0 1px 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: repeat(3, 1fr);
    gap: 24px;
    margin-block-start: var(--space-lg);
    align-items: baseline;
}

@media (min-width:768px){
    .departments-grid{
        grid-template-columns: repeat(3, 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(0,163,255,0.22);
    box-shadow:none;
}

.d-num{
    font-size:1.5rem;
    font-weight:700;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
    text-shadow: 0 1px 0 rgba(0,0,0,0.15);
}

.d-num span{
    color:#ffffff;
    font-size:1.1rem;
    margin-inline-start: var(--space-xs);
    opacity:0.95;
}

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

.d-image img{
    width:100%;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.18);
}

.security-section{
    background:#0a2239;
    color:#ffffff;
    border-bottom:1px solid rgba(0,163,255,0.16);
}

.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: #ff4d6d;
    border-radius: 50%;
    width:140px;
    height:140px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    margin-inline:auto;
    color: #041525;
    font-weight:700;
    box-shadow:none;
    border: 1px solid rgba(255,255,255,0.22);
}

.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:#ffffff;
    transition: all var(--transition-base);
    border: 1px solid rgba(0,163,255,0.22);
    box-shadow:none;
}

.node:hover{
    transform: scale(1.04);
    background: rgba(255,255,255,0.10);
    border-color: rgba(255,77,109,0.35);
}

.node-title{
    font-weight:600;
    color: var(--color-accent);
    margin-block: var(--space-xs);
    text-shadow: 0 1px 0 rgba(0,0,0,0.15);
}

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

.honor-section{
    background: var(--color-bg-soft);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

.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: all var(--transition-base);
    border: 1px solid rgba(0,163,255,0.18);
    box-shadow:none;
}

.honor-text-card:hover{
    transform: translateY(-2px);
    box-shadow:none;
    border-inline-start-color: var(--color-accent);
}

.mission-section{
    background:#0a2a52;
    padding-block: var(--space-2xl);
    color:#ffffff;
    border-bottom:1px solid rgba(255,77,109,0.14);
}

.mission-list li{
    margin-bottom: var(--space-sm);
    color:#d7e7ff;
}

.stats-section{
    background:#ffffff;
    border-bottom:1px solid rgba(0,163,255,0.10);
}

.stats-card{
    transition: all var(--transition-base);
    background: var(--color-bg-soft);
    border: 1px solid rgba(0,163,255,0.18);
    border-radius: var(--radius-md);
    box-shadow:none;
}

.stats-card:hover{
    transform: translateY(-3px);
    box-shadow:none;
    background:#eef8ff;
    border-color: rgba(0,163,255,0.35);
}

.stats-card h3{
    font-variant-numeric: tabular-nums;
    color: var(--color-primary-darker);
    text-shadow: none;
}

.news-section{
    background: var(--color-bg-soft);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

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

.news-card:hover{
    transform: translateY(-3px);
    box-shadow:none;
    border-color: rgba(0,163,255,0.35);
    background:#f3faff;
}

.news-img-wrap{
    height:200px;
    overflow:hidden;
    position:relative;
    border-bottom:1px solid rgba(0,163,255,0.14);
}

.news-img-wrap img{
    width:100%;
    height:100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

.news-card:hover .news-img-wrap img{
    transform: scale(1.06);
}

.matches-section{
    background: var(--color-bg-soft);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

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

.match-card:hover{
    transform: translateY(-2px);
    box-shadow:none;
    border-color: var(--color-primary);
    background:#f6fbff;
}

.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: var(--color-primary-darker);
}

.trust-section{
    background:#071a2d;
    color:#ffffff;
    border-bottom:1px solid rgba(0,163,255,0.16);
}

.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: all var(--transition-base);
    border: 1px solid rgba(0,163,255,0.22);
    box-shadow:none;
}

.trust-card:hover{
    transform: translateY(-2px);
    background: rgba(255,255,255,0.10);
    border-color: rgba(255,77,109,0.35);
}

.partners-section{
    background: var(--color-bg-soft);
    border-bottom:1px solid rgba(0,163,255,0.10);
}

.partner-card{
    transition: all var(--transition-base);
    box-shadow:none;
    border-radius: var(--radius-md);
    border: 1px solid rgba(0,163,255,0.18);
    background:#ffffff;
}

.partner-card:hover{
    transform: translateY(-3px);
    box-shadow:none;
    border-color: rgba(0,163,255,0.35);
    background:#f3faff;
}

.testimonials-section{
    background:#ffffff;
    border-bottom:1px solid rgba(0,163,255,0.10);
}

.testimonial-card{
    transition: all var(--transition-base);
    border-block-start: 4px solid transparent;
    border-radius: var(--radius-md);
    border: 1px solid rgba(0,163,255,0.18);
    box-shadow:none;
    background:#ffffff;
}

.testimonial-card:hover{
    border-block-start-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow:none;
    border-color: rgba(255,77,109,0.28);
}

.cta-banner-section{
    background:#09355b;
    color:#ffffff;
    position:relative;
    overflow:hidden;
    border-top:1px solid rgba(0,163,255,0.16);
    border-bottom:1px solid rgba(255,77,109,0.14);
}

.cta-banner-section::before{
    content:'';
    position:absolute;
    inset:0;
    background: rgba(2,43,68,0.55);
    z-index:0;
}

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

.cta-banner-section .btn-warning{
    box-shadow:none;
    border:1px solid rgba(255,77,109,0.25);
    background:#ffb020;
    color:#1b1b1b;
    transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.text-white-75{
    color: rgba(255,255,255,0.86) !important;
}

.footer{
    font-size:0.9rem;
    color:#5f7a95;
}

.footer a {
    transition: color 140ms ease-out;
}

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

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

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

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

.footer-beian img {
    margin-inline-end: 4px;
    transition: transform 160ms ease-out;
}

.footer-beian a:hover img {
    transform: scale(1.15);
}

.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: #3b82f6;
    box-shadow: none;
}

.btn-primary {
    background-color: #1f6feb;
    border-color: #1f6feb;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #1b5fd0;
    border-color: #1b5fd0;
}

.input-group-text {
    background-color: #f2f5fb;
    border-color: #d7deea;
}

/* ============================================
   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 { }
.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%; }
}