:root {
    --color-primary: #87a878;
    --color-primary-dark: #5a7a5a;
    --color-primary-darker: #2d4a2d;
    --color-accent: #c47b5a;
    --color-accent-dark: #a66245;
    --color-success: #6a9e6a;
    --color-danger: #c05a5a;

    --color-text: #2d2d2d;
    --color-text-muted: #4a4a4a;
    --color-text-light: #7a7a7a;
    --color-bg: #faf8f3;
    --color-bg-soft: #f3f0e8;
    --color-bg-muted: #ebe6dc;
    --color-border: #d6d2c8;
    --color-border-soft: #e3ded4;

    --gradient-hero: linear-gradient(135deg, #5a7a5a 0%, #87a878 100%);
    --gradient-deep: linear-gradient(135deg, #2d4a2d 0%, #5a7a5a 100%);
    --gradient-dept: linear-gradient(135deg, #4a6a4a 0%, #87a878 100%);
    --gradient-security: linear-gradient(135deg, #3a5a3a, #2d4a2d);
    --gradient-mission: linear-gradient(135deg, #2d4a2d, #4a6a4a);
    --gradient-trust: linear-gradient(135deg, #2d4a2d, #3a5a3a);
    --gradient-cta: linear-gradient(135deg, #5a7a5a 0%, #87a878 100%);
    --gradient-accent: linear-gradient(135deg, #c47b5a, #a66245);
    --gradient-icon: linear-gradient(135deg, #87a878, #5a7a5a);

    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-blur: blur(12px);

    --shadow-sm: 0 6px 18px rgba(45, 45, 45, 0.06), 0 2px 6px rgba(45, 45, 45, 0.03);
    --shadow-md: 0 10px 24px rgba(45, 45, 45, 0.08), 0 4px 12px rgba(45, 45, 45, 0.04);
    --shadow-lg: 0 16px 36px rgba(45, 45, 45, 0.1), 0 6px 18px rgba(45, 45, 45, 0.05);
    --shadow-xl: 0 20px 44px rgba(45, 45, 45, 0.12), 0 8px 20px rgba(45, 45, 45, 0.06);
    --shadow-primary: 0 12px 28px rgba(135, 168, 120, 0.2), 0 4px 8px rgba(135, 168, 120, 0.1);
    --shadow-accent: 0 10px 24px rgba(196, 123, 90, 0.2), 0 3px 8px rgba(196, 123, 90, 0.1);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 40px;

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

    --transition-fast: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-base: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

: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: #faf8f3; font-size: 1.5rem; flex-shrink: 0; box-shadow: var(--shadow-sm); }

.header { background: var(--color-bg); z-index: 1030; }
.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: var(--color-text); transition: color var(--transition-fast); }
.header .nav-link:hover { color: var(--color-primary); }

.hero-section { min-height: 480px; background: var(--gradient-hero); color: #faf8f3; padding-block: var(--space-2xl); position: relative; overflow: hidden; }
.hero-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(45,45,45,0.2), rgba(45,45,45,0.1)); 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 8px rgba(45,45,45,0.15); }
.hero-section h2 { font-size: clamp(1.1rem, 2vw, 1.4rem); opacity: 0.9; margin-bottom: var(--space-md); font-weight: 500; }
.hero-section .lead { font-size: 1.1rem; max-width: 700px; margin-inline: auto; opacity: 0.95; }

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

.notice-bar { animation: noticeSlideIn 0.6s cubic-bezier(0.25,0.46,0.45,0.94); }
.notice-bar a { transition: opacity var(--transition-fast); }
.notice-bar a:hover { opacity: 0.75; }

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

.breadcrumb-nav { background: var(--color-bg-muted); }
.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); }
.whyus-card { background: var(--color-bg); border: 2px solid transparent; border-image: linear-gradient(135deg, var(--color-primary), var(--color-accent)) 1; border-radius: var(--radius-lg); padding: var(--space-md); transition: all var(--transition-base); height: 100%; }
.whyus-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-primary); }

.about-section { background: var(--gradient-deep); color: #faf8f3; }
.about-img-wrap { overflow: hidden; border-radius: var(--radius-lg); }
.about-img-wrap img { transition: transform var(--transition-slow); }
.about-img-wrap:hover img { transform: scale(1.05); }
.about-card { transition: all var(--transition-base); }
.about-card:hover { transform: translateY(-3px); background: rgba(255, 255, 255, 0.1); }
.text-white-75 { color: rgba(255, 255, 255, 0.75) !important; }

.departments-section { background: var(--gradient-dept); color: #faf8f3; }
.departments-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: var(--space-sm); text-shadow: 0 2px 6px rgba(45,45,45,0.2); }
.departments-subtitle { font-size: 1.05rem; max-width: 800px; margin-inline: auto; color: rgba(255, 255, 255, 0.85); }
.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); }
.d-num { font-size: 1.5rem; font-weight: 700; color: var(--color-accent); margin-bottom: var(--space-xs); }
.d-num span { color: #faf8f3; 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); }

.security-section { background: var(--gradient-security); color: #faf8f3; }
.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: 0 0 40px rgba(196, 123, 90, 0.5), 0 0 20px rgba(196, 123, 90, 0.3); }
.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: #faf8f3; transition: all var(--transition-base); }
.node:hover { transform: scale(1.05); background: rgba(255, 255, 255, 0.1); }
.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); }
.honor-row { padding-block: var(--space-sm); }
.honor-text-card { padding: var(--space-md); background: var(--color-bg); border-radius: var(--radius-md); border-inline-start: 4px solid var(--color-primary); transition: all var(--transition-base); }
.honor-text-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.mission-section { background: var(--gradient-mission); padding-block: var(--space-2xl); color: #faf8f3; }
.mission-list li { margin-bottom: var(--space-sm); color: #d6d2c8; }

.stats-section { background: var(--color-bg); }
.stats-card { transition: all var(--transition-base); background: var(--color-bg-soft); }
.stats-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); background: linear-gradient(135deg, #faf8f3 0%, #e3ded4 100%); }
.stats-card h3 { font-variant-numeric: tabular-nums; color: var(--color-primary-darker); }

.news-section { background: var(--color-bg-soft); }
.news-card { transition: all var(--transition-base); border: 2px solid transparent; border-image: linear-gradient(135deg, var(--color-bg-muted), var(--color-bg-soft)) 1; border-radius: var(--radius-lg); }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.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); }
.news-card:hover .news-img-wrap img { transform: scale(1.08); }

.matches-section { background: var(--color-bg-soft); }
.match-card { transition: all var(--transition-base); border: 2px solid transparent; border-image: linear-gradient(135deg, var(--color-border-soft), var(--color-primary)) 1; border-radius: var(--radius-md); }
.match-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); 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: #faf8f3; }
.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); }
.trust-card:hover { transform: translateY(-3px); background: rgba(255, 255, 255, 0.1); }

.partners-section { background: var(--color-bg-soft); }
.partner-card { transition: all var(--transition-base); }
.partner-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-primary); }

.testimonials-section { background: var(--color-bg); }
.testimonial-card { transition: all var(--transition-base); border-block-start: 4px solid transparent; }
.testimonial-card:hover { border-block-start-color: var(--color-accent); transform: translateY(-5px); box-shadow: var(--shadow-md); }

.cta-banner-section { background: var(--gradient-cta); color: #faf8f3; position: relative; overflow: hidden; }
.cta-banner-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(45,45,45,0.25), rgba(45,45,45,0.1)); z-index: 0; }
.cta-banner-section > .container { position: relative; z-index: 1; }
.cta-banner-section .btn-warning { box-shadow: var(--shadow-accent); }
.text-white-75 { color: rgba(255, 255, 255, 0.85) !important; }

.footer { font-size: 0.9rem; color: #7a7a7a; background: var(--color-bg-muted); }

.footer a {
    transition: color 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.footer a:hover {
    color: var(--color-accent, #87a878) !important;
}

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

/* Beian */
.footer-beian {
    font-size: 0.8rem;
    line-height: 1.8;
    opacity: 0.9;
}

.footer-beian a:hover {
    color: var(--color-accent, #87a878) !important;
    text-decoration: underline !important;
}

.footer-beian img {
    margin-inline-end: 4px;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.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: #87a878;
    box-shadow: 0 0 0 0.25rem rgba(135, 168, 120, 0.18), 0 0 20px rgba(135, 168, 120, 0.08);
}

.btn-primary {
    background: linear-gradient(135deg, #87a878 0%, #6b8f5c 100%);
    border-color: #87a878;
}

.btn-primary:hover,
.btn-primary:focus {
    background: linear-gradient(135deg, #6b8f5c 0%, #5a7a4d 100%);
    border-color: #5a7a4d;
}

.input-group-text {
    background: linear-gradient(135deg, #faf8f3 0%, #f5f2ea 100%);
    border-color: #e0d8cc;
}

/* ============================================
   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%; }
}