:root{
    --color-primary:#c44536;
    --color-primary-dark:#6b1f19;
    --color-primary-darker:#2b0f0c;
    --color-accent:#6b705c;
    --color-accent-dark:#4a4f3f;
    --color-success:#2f6f3b;
    --color-danger:#b3261e;

    --color-text:#1a1a1a;
    --color-text-muted:#3f3f3f;
    --color-text-light:#686868;
    --color-bg:#f5f1e8;
    --color-bg-soft:#fbf7ef;
    --color-bg-muted:#f0ece2;
    --color-border:#e6dfd0;
    --color-border-soft:#f0ece2;

    --gradient-hero: linear-gradient(135deg,#2b0f0c 0%, #1a1a1a 55%, #c44536 100%);
    --gradient-deep: linear-gradient(135deg,#120a0a 0%, #2b0f0c 55%, #6b1f19 100%);
    --gradient-dept: linear-gradient(135deg,#22110e 0%, #2f1b16 45%, #c44536 100%);
    --gradient-security: linear-gradient(135deg,#2b0f0c 0%, #1a1a1a 50%, #6b705c 100%);
    --gradient-mission: linear-gradient(135deg,#c44536 0%, #6b705c 100%);
    --gradient-trust: linear-gradient(135deg,#1a1a1a 0%, #2b0f0c 55%, #6b705c 100%);
    --gradient-cta: linear-gradient(135deg,#c44536 0%, #6b705c 100%);
    --gradient-accent: linear-gradient(135deg,#6b705c 0%, #2f6f3b 55%, #c44536 100%);
    --gradient-icon: linear-gradient(135deg,#c44536 0%, #6b705c 100%);

    --glass-bg: rgba(245,241,232,0.78);
    --glass-border: rgba(26,26,26,0.14);
    --glass-blur: blur(0px);

    --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: 999px;

    --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;
    caret-color:var(--color-primary);
    accent-color:var(--color-primary);
}

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

.bg-glass{
    background:rgba(245,241,232,0.85);
    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:#f5f1e8;
    font-size:1.5rem;
    flex-shrink:0;
    border:1px solid rgba(245,241,232,0.25);
}

.header{
    background:#fbf7ef;
    z-index:1030;
    border-bottom:1px solid var(--color-border-soft);
}

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

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

.header .nav-link{
    font-weight:500;
    color:#1a1a1a;
    transition:color var(--transition-fast);
}

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

.hero-section{
    min-height:480px;
    background:var(--gradient-hero);
    color:#f5f1e8;
    padding-block:var(--space-2xl);
    position:relative;
    overflow:hidden;
    border-bottom:1px solid rgba(229,223,208,0.55);
}

.hero-section::before{
    content:'';
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.18);
    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(0,0,0,0.22);
}

.hero-section h2{
    font-size:clamp(1.1rem, 2vw, 1.4rem);
    opacity:0.95;
    margin-bottom:var(--space-md);
    font-weight:500;
    text-shadow:0 1px 0 rgba(0,0,0,0.18);
}

.hero-section .lead{
    font-size:1.1rem;
    max-width:700px;
    margin-inline:auto;
    opacity:0.95;
    text-shadow:0 1px 0 rgba(0,0,0,0.14);
}

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

.notice-bar{
    animation:noticeSlideIn 520ms 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-bottom:1px solid var(--color-border-soft);
}

.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-top:1px solid var(--color-border-soft);
}

.whyus-card{
    background:#fbf7ef;
    border:1px solid var(--color-border);
    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%;
}

.whyus-card:hover{
    transform:translateY(-2px);
    box-shadow:none;
    background:#f5f1e8;
    border-color:rgba(196,69,54,0.55);
}

.about-section{
    background:var(--gradient-deep);
    color:#f5f1e8;
    border-bottom:1px solid rgba(230,223,208,0.45);
}

.about-img-wrap{
    overflow:hidden;
    border-radius:var(--radius-lg);
    border:1px solid rgba(245,241,232,0.22);
}

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

.about-img-wrap:hover img{
    transform:scale(1.05);
}

.about-card{
    transition:transform var(--transition-base), background-color var(--transition-base);
}

.about-card:hover{
    transform:translateY(-2px);
    background:rgba(245,241,232,0.1);
}

.text-white-75{
    color:rgba(245,241,232,0.85) !important;
}

.departments-section{
    background:var(--gradient-dept);
    color:#f5f1e8;
    border-bottom:1px solid rgba(230,223,208,0.35);
}

.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(245,241,232,0.9);
}

.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:rgba(245,241,232,0.78);
    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(26,26,26,0.14);
    transition:transform var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}

.d-num{
    font-size:1.5rem;
    font-weight:700;
    color:var(--color-accent);
    margin-bottom:var(--space-xs);
    text-shadow:0 1px 0 rgba(255,255,255,0.35);
}

.d-num span{
    color:#1a1a1a;
    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(26,26,26,0.14);
}

.security-section{
    background:var(--gradient-security);
    color:#f5f1e8;
    border-bottom:1px solid rgba(230,223,208,0.4);
}

.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:var(--color-primary-darker);
    font-weight:700;
    box-shadow:none;
    border:1px solid rgba(245,241,232,0.22);
    text-shadow:0 1px 0 rgba(255,255,255,0.28);
}

.node{
    background:rgba(245,241,232,0.78);
    backdrop-filter:var(--glass-blur);
    -webkit-backdrop-filter:var(--glass-blur);
    border-radius:var(--radius-md);
    padding:var(--space-sm);
    text-align:center;
    color:#1a1a1a;
    transition:transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    border:1px solid rgba(26,26,26,0.14);
}

.node:hover{
    transform:scale(1.03);
    background:rgba(245,241,232,0.92);
    border-color:rgba(196,69,54,0.4);
}

.node-title{
    font-weight:600;
    color:var(--color-accent);
    margin-block:var(--space-xs);
}

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

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

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

.honor-text-card{
    padding:var(--space-md);
    background:#fbf7ef;
    border-radius:var(--radius-md);
    border-inline-start:4px solid var(--color-primary);
    transition:transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    border:1px solid var(--color-border-soft);
}

.honor-text-card:hover{
    transform:translateY(-2px);
    box-shadow:none;
    background:#f5f1e8;
    border-color:rgba(196,69,54,0.35);
}

.mission-section{
    background:var(--gradient-mission);
    padding-block:var(--space-2xl);
    color:#f5f1e8;
    border-bottom:1px solid rgba(230,223,208,0.35);
}

.mission-list li{
    margin-bottom:var(--space-sm);
    color:rgba(245,241,232,0.86);
}

.stats-section{
    background:#fbf7ef;
    border-top: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);
}

.stats-card:hover{
    transform:translateY(-3px);
    box-shadow:none;
    background:#f5f1e8;
    border-color:rgba(196,69,54,0.35);
}

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

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

.news-card{
    transition:transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    border:1px solid var(--color-border-soft);
    background:#fbf7ef;
    border-radius:var(--radius-md);
}

.news-card:hover{
    transform:translateY(-3px);
    box-shadow:none;
    border-color:rgba(196,69,54,0.4);
}

.news-img-wrap{
    height:200px;
    overflow:hidden;
    position:relative;
    border-bottom:1px solid var(--color-border-soft);
}

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

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

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

.match-card{
    transition:transform var(--transition-base), border-color var(--transition-base);
    border:1px solid var(--color-border-soft);
    background:#fbf7ef;
    border-radius:var(--radius-md);
}

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

.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:var(--gradient-trust);
    color:#f5f1e8;
    border-top:1px solid rgba(230,223,208,0.35);
}

.trust-card{
    background:rgba(245,241,232,0.78);
    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(26,26,26,0.14);
    color:#1a1a1a;
}

.trust-card:hover{
    transform:translateY(-2px);
    background:rgba(245,241,232,0.92);
    border-color:rgba(196,69,54,0.35);
}

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

.partner-card{
    transition:transform var(--transition-base), box-shadow var(--transition-base);
    border:1px solid var(--color-border-soft);
    border-radius:var(--radius-md);
    background:#fbf7ef;
}

.partner-card:hover{
    transform:translateY(-3px);
    box-shadow:none;
    border-color:rgba(196,69,54,0.35);
}

.testimonials-section{
    background:#fbf7ef;
    border-top:1px solid var(--color-border-soft);
}

.testimonial-card{
    transition:transform var(--transition-base), border-color var(--transition-base);
    border-block-start:4px solid transparent;
    border:1px solid var(--color-border-soft);
    border-radius:var(--radius-md);
    background:#fbf7ef;
}

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

.cta-banner-section{
    background:var(--gradient-cta);
    color:#f5f1e8;
    position:relative;
    overflow:hidden;
    border-top:1px solid rgba(230,223,208,0.3);
}

.cta-banner-section::before{
    content:'';
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.24);
    z-index:0;
}

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

.cta-banner-section .btn-warning{
    box-shadow:none;
    border:1px solid rgba(245,241,232,0.28);
}

.text-white-75{
    color:rgba(245,241,232,0.85) !important;
}

.footer{
    font-size:0.9rem;
    color:#4a4f3f;
    border-top:1px solid rgba(230,223,208,0.8);
    background:transparent;
}

.footer a {
    transition: color 160ms cubic-bezier(0.2, 0.8, 0.2, 1);
    color: #1a1a1a;
}

.footer a:hover {
    color: #c44536 !important;
    text-decoration: none !important;
}

.footer-copyright {
    font-size: 0.85rem;
    color: #1a1a1a;
}

.footer-beian {
    font-size: 0.8rem;
    line-height: 1.8;
    opacity: 0.85;
    color: #1a1a1a;
}

.footer-beian a:hover {
    color: #c44536 !important;
    text-decoration: underline !important;
}

.footer-beian img {
    margin-inline-end: 4px;
    transition: transform 180ms cubic-bezier(0.2, 0.9, 0.2, 1);
    transform: translateZ(0);
    filter: none;
    opacity: 0.95;
}

.footer-beian a:hover img {
    transform: scale(1.2);
    opacity: 1;
}

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

/* Mobile */
@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: #6b705c;
    box-shadow: none;
    outline: 2px solid #6b705c;
    outline-offset: 2px;
    background-color: #f5f1e8;
}

.btn-primary {
    background-color: #c44536;
    border-color: #c44536;
    color: #f5f1e8;
    border-style: solid;
    border-radius: 4px;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #a93b2f;
    border-color: #a93b2f;
    box-shadow: none;
}

.input-group-text {
    background-color: #f5f1e8;
    border-color: #c9c3b3;
    color: #1a1a1a;
    border-style: solid;
    border-radius: 4px;
}

/* ============================================
   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;
        scroll-behavior: auto !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%; }
}