/* ==================== 全局样式 ==================== */
:root {
    /* 靶纸颜色 */
    --color-gold: #FFD700;
    --color-red: #E63946;
    --color-blue: #1D3557;
    --color-black: #0D1B2A;
    --color-white: #FFFFFF;

    /* 奥运五环色 */
    --olympic-blue: #0085C7;
    --olympic-yellow: #F4C300;
    --olympic-black: #000000;
    --olympic-green: #009F3D;
    --olympic-red: #DF0024;

    /* 中性色 */
    --gray-50: #F8F9FA;
    --gray-100: #F2F2F7;
    --gray-600: #666666;
    --gray-900: #0D1B2A;

    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 56px;

    /* 圆角 */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==================== 玻璃态效果 ==================== */
.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.glass-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.75);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-normal);
    background: rgba(29, 53, 87, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header.scrolled {
    background: rgba(29, 53, 87, 0.98);
    backdrop-filter: blur(24px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-gold);
    white-space: nowrap;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

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

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold);
    background: rgba(255, 215, 0, 0.15);
}

.cta-btn {
    background: var(--olympic-red);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.cta-btn:hover {
    background: #C62828;
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(223, 0, 36, 0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-fast);
}

/* ==================== Hero 区域 ==================== */
.hero {
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--olympic-yellow) 100%);
    padding: 120px 0 80px;
    min-height: 700px;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 700;
    color: var(--olympic-red);
    width: fit-content;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-blue);
}

.hero-desc {
    font-size: 18px;
    line-height: 1.8;
    color: var(--gray-900);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.btn {
    padding: 16px 32px;
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all var(--transition-normal);
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--olympic-red);
    color: var(--color-white);
}

.btn-primary:hover {
    background: #C62828;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(223, 0, 36, 0.3);
}

.btn-secondary {
    color: var(--color-blue);
}

.btn-secondary:hover {
    transform: translateY(-2px);
}

/* 靶心动画 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.target-rings {
    position: relative;
    width: 500px;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ring {
    position: absolute;
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

.ring-1 {
    width: 500px;
    height: 500px;
    background: var(--color-white);
    opacity: 0.3;
}

.ring-2 {
    width: 400px;
    height: 400px;
    background: var(--olympic-blue);
    opacity: 0.4;
    animation-delay: 0.2s;
}

.ring-3 {
    width: 300px;
    height: 300px;
    background: var(--color-red);
    opacity: 0.5;
    animation-delay: 0.4s;
}

.ring-4 {
    width: 200px;
    height: 200px;
    background: var(--olympic-yellow);
    opacity: 0.6;
    animation-delay: 0.6s;
}

.ring-center {
    width: 100px;
    height: 100px;
    background: var(--color-gold);
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.6);
    animation-delay: 0.8s;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* ==================== 数据展示 ==================== */
.stats-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-white);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-blue);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.stat-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-color);
}

.stat-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
}

/* ==================== 企业动态 ==================== */
.news-section {
    padding: var(--spacing-2xl) 0;
    background: var(--gray-50);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.btn-more {
    background: var(--olympic-blue);
    color: var(--color-white);
    padding: 14px 28px;
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all var(--transition-normal);
}

.btn-more:hover {
    background: #0277BD;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 133, 199, 0.3);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.news-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-image {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.news-icon {
    font-size: 48px;
}

.news-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.news-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 700;
    color: var(--color-white);
    width: fit-content;
}

.news-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-blue);
    line-height: 1.3;
}

.news-meta {
    font-size: 12px;
    color: var(--gray-600);
}

/* ==================== 课程体系 ==================== */
.courses-section {
    padding: var(--spacing-2xl) 0;
    background: var(--gray-50);
}

.section-header-center {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    margin-top: var(--spacing-sm);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.course-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--course-color);
}

.course-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.course-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-blue);
    margin-bottom: var(--spacing-sm);
}

.course-desc {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.course-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.course-features li {
    padding: var(--spacing-xs) 0;
    color: var(--gray-600);
    font-size: 14px;
}

.course-link {
    color: var(--course-color);
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all var(--transition-fast);
}

.course-link:hover {
    transform: translateX(4px);
    display: inline-block;
}

/* ==================== 教练团队 ==================== */
.coaches-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-white);
}

.coaches-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.coach-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.coach-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.coach-icon {
    font-size: 80px;
}

.coach-info {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.coach-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-blue);
}

.coach-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 700;
    width: fit-content;
}

.coach-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==================== CTA 区域 ==================== */
.cta-section {
    padding: var(--spacing-2xl) 0;
    background: var(--olympic-red);
    text-align: center;
}

.cta-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.cta-title {
    font-size: 64px;
    font-weight: 700;
    color: var(--color-white);
}

.cta-desc {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
}

.btn-cta {
    background: var(--color-gold);
    color: var(--color-blue);
    padding: 18px 40px;
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    transition: all var(--transition-normal);
    display: inline-block;
}

.btn-cta:hover {
    background: var(--olympic-yellow);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255, 215, 0, 0.4);
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-blue);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
}

.footer-logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.footer-slogan {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
    font-size: 16px;
}

.footer-column a,
.footer-column p {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

    .section-title {
        font-size: 36px;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: rgba(29, 53, 87, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: left var(--transition-normal);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .target-rings {
        width: 300px;
        height: 300px;
    }

    .ring-1 {
        width: 300px;
        height: 300px;
    }

    .ring-2 {
        width: 240px;
        height: 240px;
    }

    .ring-3 {
        width: 180px;
        height: 180px;
    }

    .ring-4 {
        width: 120px;
        height: 120px;
    }

    .ring-center {
        width: 60px;
        height: 60px;
    }

    .section-title {
        font-size: 28px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .news-grid,
    .courses-grid,
    .coaches-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .cta-title {
        font-size: 36px;
    }

    .cta-desc {
        font-size: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-icon {
        font-size: 32px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
}