/* style.css - AG体育官方网站 */
/* ===== 基础重置与变量 ===== */
:root {
    --primary: #1a73e8;
    --primary-dark: #0d47a1;
    --bg: #ffffff;
    --bg2: #f5f9ff;
    --text: #1a1a2e;
    --text2: #555555;
    --glass: rgba(255, 255, 255, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --radius: 20px;
    --transition: 0.3s ease;
    --gradient-primary: linear-gradient(135deg, #1a73e8, #0d47a1);
    --gradient-accent: linear-gradient(135deg, #1a73e8, #4fc3f7);
    --gradient-banner: linear-gradient(135deg, #1a73e8, #0d47a1);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

[data-theme="dark"] {
    --bg: #0d1117;
    --bg2: #161b22;
    --text: #e6edf3;
    --text2: #8b949e;
    --glass: rgba(22, 27, 34, 0.8);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    --gradient-banner: linear-gradient(135deg, #1a73e8, #0d47a1);
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 毛玻璃效果 ===== */
.glass {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: transform var(--transition), box-shadow var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
    line-height: 1.5;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(26, 115, 232, 0.3);
}

.btn:active {
    transform: translateY(-1px);
}

/* ===== 区块 ===== */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 16px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    line-height: 1.3;
}

.section-sub {
    text-align: center;
    color: var(--text2);
    max-width: 700px;
    margin: 0 auto 48px;
    font-size: 1.05rem;
}

/* ===== 网格 ===== */
.grid {
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ===== 卡片 ===== */
.card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: default;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

.card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
}

.card-icon svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.card p {
    color: var(--text2);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== 徽章 ===== */
.badge {
    display: inline-block;
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition);
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

nav {
    display: flex;
    gap: 24px;
    align-items: center;
}

nav a {
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

nav a.active {
    color: var(--primary);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--text);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text);
    transition: var(--transition);
    line-height: 1;
}

.theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--text);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

/* ===== 移动端导航 ===== */
@media (max-width: 768px) {
    nav {
        display: none;
    }
    .mobile-menu {
        display: block;
    }
    header.mobile-open nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--glass);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 70px;
    background: linear-gradient(135deg, var(--bg2) 0%, var(--bg) 50%, var(--bg2) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.08), transparent 70%);
    top: -200px;
    right: -200px;
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(79, 195, 247, 0.06), transparent 70%);
    bottom: -150px;
    left: -150px;
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #1a73e8, #4fc3f7, #1a73e8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero p {
    font-size: 1.2rem;
    color: var(--text2);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Banner轮播 ===== */
.banner-slider {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius);
    margin-top: 48px;
}

.banner-slide {
    min-width: 100%;
    display: none;
    padding: 60px 40px;
    background: var(--gradient-banner);
    color: #fff;
    text-align: center;
    border-radius: var(--radius);
}

.banner-slide.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.banner-slide h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.banner-slide p {
    font-size: 1rem;
    opacity: 0.9;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text2);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    padding: 0;
}

.dot.active {
    background: var(--primary);
    width: 32px;
    border-radius: 6px;
}

/* ===== 品牌介绍 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-image svg {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    border-radius: var(--radius);
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
    text-align: center;
}

.stat-item {
    background: var(--glass);
    padding: 32px 16px;
    border-radius: var(--radius);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--primary);
    display: block;
    line-height: 1.2;
}

.stat-label {
    color: var(--text2);
    margin-top: 8px;
    font-size: 0.95rem;
}

/* ===== 时间线 ===== */
.timeline {
    position: relative;
    padding-left: 32px;
    border-left: 3px solid var(--primary);
    margin-top: 32px;
}

.timeline-item {
    margin-bottom: 32px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 6px;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg);
    transition: transform var(--transition);
}

.timeline-item:hover::before {
    transform: scale(1.3);
}

.timeline-item h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    font-weight: 700;
}

.timeline-item span {
    color: var(--text2);
    font-size: 0.9rem;
}

/* ===== FAQ ===== */
.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    cursor: pointer;
    transition: background var(--transition);
}

.faq-item:hover {
    background: rgba(26, 115, 232, 0.02);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    gap: 16px;
}

.faq-question span {
    transition: transform var(--transition);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.faq-item.open .faq-question span {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    color: var(--text2);
    padding-top: 0;
    line-height: 1.6;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding-top: 16px;
}

/* ===== 文章卡片 ===== */
.article-card {
    background: var(--glass);
    border-radius: var(--radius);
    padding: 24px;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.article-card .date {
    color: var(--text2);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.article-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.article-card p {
    color: var(--text2);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

/* ===== HowTo步骤 ===== */
.howto-steps {
    counter-reset: step;
    margin-top: 24px;
}

.howto-step {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
    transition: transform var(--transition);
}

.howto-step:hover {
    transform: translateX(8px);
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    min-width: 40px;
    height: 40px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.howto-step h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    font-weight: 700;
}

.howto-step p {
    color: var(--text2);
    line-height: 1.6;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info p {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.contact-info svg {
    width: 20px;
    height: 20px;
    fill: var(--primary);
    flex-shrink: 0;
}

.qr-grid {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-top: 24px;
}

.qr-item {
    text-align: center;
}

.qr-item svg {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    background: #fff;
    padding: 8px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.qr-item:hover svg {
    transform: scale(1.05);
}

.qr-item span {
    display: block;
    margin-top: 8px;
    color: var(--text2);
    font-size: 0.9rem;
}

/* ===== 推荐 ===== */
.recommendations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.recommendation-item {
    background: var(--glass);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.recommendation-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.recommendation-item svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    fill: var(--primary);
}

.recommendation-item h4 {
    font-size: 1rem;
    font-weight: 600;
}

/* ===== 页脚 ===== */
footer {
    background: var(--bg2);
    padding: 60px 0 30px;
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text);
    font-weight: 700;
}

.footer-col a {
    display: block;
    color: var(--text2);
    margin-bottom: 8px;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text2);
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-bottom a {
    color: var(--text2);
    margin: 0 8px;
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    z-index: 999;
    line-height: 1;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 115, 232, 0.4);
}

/* ===== 搜索弹窗 ===== */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.search-modal.open {
    display: flex;
}

.search-box {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 32px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.2);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.search-box input {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    background: var(--bg2);
    color: var(--text);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition);
}

.search-box input:focus {
    border-color: var(--primary);
}

.search-results {
    margin-top: 16px;
    max-height: 300px;
    overflow-y: auto;
}

.search-results div {
    padding: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: background var(--transition);
    border-radius: 8px;
}

.search-results div:hover {
    background: var(--bg2);
}

.search-results div:last-child {
    border-bottom: none;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .section-sub {
        font-size: 0.95rem;
        margin-bottom: 32px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .stat-number {
        font-size: 2rem;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .banner-slide {
        padding: 40px 24px;
    }
    .banner-slide h2 {
        font-size: 1.4rem;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .qr-grid {
        gap: 16px;
    }
    .qr-item svg {
        width: 100px;
        height: 100px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 48px 0;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .grid {
        gap: 20px;
        grid-template-columns: 1fr;
    }
    .stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .stat-item {
        padding: 20px 12px;
    }
    .stat-number {
        font-size: 1.6rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ===== 滚动动画（基础） ===== */
.card,
.article-card,
.stat-item,
.timeline-item,
.faq-item,
.howto-step {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ===== 无障碍 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== 打印样式 ===== */
@media print {
    header,
    .back-to-top,
    .search-modal,
    .banner-slider {
        display: none !important;
    }
    body {
        background: #fff;
        color: #000;
    }
    .section {
        padding: 24px 0;
        page-break-inside: avoid;
    }
}