:root {
    /* 品牌色 */
    --color-primary: #6b4d9a;
    --color-primary-dark: #3b2a59;
    --color-primary-darker: #24183e;
    --color-accent: #d3a94a;
    --color-accent-dark: #a27f38;
    --color-success: #2e7a40;
    --color-danger: #94292b;

    /* 中性色 */
    --color-text: #d8d0c7;
    --color-text-muted: #a69e95;
    --color-text-light: #8b867f;
    --color-bg: #0f0f1a;
    --color-bg-soft: #1a1a32;
    --color-bg-muted: #14142a;
    --color-border: #4c446a;
    --color-border-soft: #2e2b4b;

    /* 渐变 (Section 背景) */
    --gradient-hero: none;
    --gradient-deep: none;
    --gradient-dept: none;
    --gradient-security: none;
    --gradient-mission: none;
    --gradient-trust: none;
    --gradient-cta: none;
    --gradient-accent: none;
    --gradient-icon: none;

    /* 玻璃效果 */
    --glass-bg: #1a1a32;
    --glass-border: #3b2a59;
    --glass-blur: none;

    /* 阴影 */
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --shadow-xl: none;
    --shadow-primary: none;
    --shadow-accent: none;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 6px;
    --radius-pill: 0px;

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

    /* 过渡 */
    --transition-fast: 0.1s ease-in-out;
    --transition-base: 0.15s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
}

: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);
    border: 1px solid var(--glass-border);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.icon-circle {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.header {
    background: #111123;
    z-index: 1030;
}

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

.header .navbar-brand:hover img {
    transform: scale(1.04);
}

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

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

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

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    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-align: center;
}

.hero-section h2 {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    opacity: 0.95;
    margin-bottom: var(--space-md);
    font-weight: 500;
    text-align: center;
    color: var(--color-text-muted);
}

.hero-section .lead {
    font-size: 1.1rem;
    max-width: 720px;
    margin-inline: auto;
    opacity: 1;
    color: var(--color-text);
    text-align: center;
}

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

.notice-bar {
    animation: noticeSlideIn 0.4s cubic-bezier(0.4,0,0.2,1);
}

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

.notice-bar a:hover {
    opacity: 0.8;
}

@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);
    color: var(--color-text-muted);
}

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

.why-us-section {
    background: var(--color-bg-soft);
}

.whyus-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition-base);
    height: 100%;
}

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

.about-section {
    background: var(--color-bg);
    color: var(--color-text);
}

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

.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);
    background: transparent;
}

.about-card:hover {
    transform: translateY(-2px);
    background: rgba(211, 169, 74, 0.15);
}

.text-white-75 {
    color: rgba(211, 169, 74, 0.75) !important;
}

.departments-section {
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.departments-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    text-align: center;
    color: var(--color-text);
}

.departments-subtitle {
    font-size: 1.05rem;
    max-width: 800px;
    margin-inline: auto;
    color: rgba(211, 169, 74, 0.9);
    text-align: center;
}

.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(--color-bg-soft);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    border: 1px solid var(--color-border);
}

.d-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.d-num span {
    color: var(--color-text);
    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(--color-bg-soft);
    color: var(--color-text);
}

.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(--color-accent);
    border-radius: 6px;
    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;
}

.node {
    background: var(--color-bg-soft);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    text-align: center;
    color: var(--color-text);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.node:hover {
    transform: scale(1.05);
    background: var(--color-bg);
    border-color: var(--color-accent);
}

.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: none;
    border-inline-start-color: var(--color-accent);
}

.mission-section {
    background: var(--color-bg);
    padding-block: var(--space-2xl);
    color: var(--color-text);
}

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

.stats-section {
    background: var(--color-bg);
}

.stats-card {
    transition: all var(--transition-base);
    background: var(--color-bg-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.stats-card:hover {
    transform: translateY(-2px);
    background: var(--color-bg);
    border-color: var(--color-accent);
    box-shadow: none;
}

.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: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
}

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

.news-img-wrap {
    height: 200px;
    overflow: hidden;
    position: relative;
    border-radius: var(--radius-md);
}

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

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

.matches-section {
    background: var(--color-bg-soft);
}

.match-card {
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
}

.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(--color-bg-soft);
    color: var(--color-text);
}

.trust-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-sm);
    height: 100%;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.trust-card:hover {
    transform: translateY(-2px);
    background: var(--color-bg);
    border-color: var(--color-accent);
    box-shadow: none;
}

.partners-section {
    background: var(--color-bg-soft);
}

.partner-card {
    transition: all var(--transition-base);
    background: transparent;
}

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

.testimonials-section {
    background: var(--color-bg);
}

.testimonial-card {
    transition: all var(--transition-base);
    border-block-start: 4px solid transparent;
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

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

.cta-banner-section {
    background: var(--color-bg);
    color: var(--color-text);
    position: relative;
    overflow: hidden;
}

.cta-banner-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    z-index: 0;
}

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

.cta-banner-section .btn-warning {
    box-shadow: none;
}

.text-white-75 {
    color: rgba(211, 169, 74, 0.85) !important;
}

.footer {
    font-size: 0.9rem;
    color: #7e7497;
}

.footer a {
    transition: color var(--transition-fast);
}

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

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

/* Beian */
.footer-beian {
    font-size: 0.8rem;
    line-height: 1.8;
    opacity: 0.85;
}

.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);
}

.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: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.15);
}

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #2563eb;
    border-color: #2563eb;
}

.input-group-text {
    background-color: var(--color-bg-muted);
    border-color: var(--color-border);
}

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