/* ========================================
   bansakura 风格模板 - 深紫蓝
   主背景: #1c1f3f  强调: #7c3aed
   balonsakura.com 同款 9 区块结构
   Bootstrap 5 + Swiper + 玻璃拟态 + 圆角4
   ======================================== */
:root {
    --bg-primary: #1c1f3f;
    --bg-deep: #050507;
    --bg-card: rgba(255, 255, 255, 0.08);
    --bg-card-hover: rgba(255, 255, 255, 0.14);
    --accent: #7c3aed;
    --accent-soft: rgba(255, 255, 255, 0.15);
    --info: #0dcaf0;
    --warning: #ffc107;
    --success: #10b981;
    --danger: #dc2626;
    --text-light: #FFFFFF;
    --text-muted: rgba(255, 255, 255, 0.7);
    --text-faint: rgba(255, 255, 255, 0.45);
    --border-soft: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 15px 40px rgba(0, 0, 0, 0.35);
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: #1c1f3f;
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.25s ease;
}

.bg-glass {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-soft);
}

.bg-glass-strong {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-soft);
}

.rounded-4 { border-radius: var(--radius-xl) !important; }
.rounded-3 { border-radius: var(--radius-lg) !important; }

/* ========== 顶部固定导航 ========== */
.bsk-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-soft);
    padding: 14px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bsk-nav-logo {
    font-size: 20px;
    font-weight: 800;
    color: #7c3aed;
    letter-spacing: -0.5px;
}

.bsk-nav-menu {
    display: flex;
    gap: 28px;
    list-style: none;
}

.bsk-nav-menu a {
    color: var(--text-light);
    font-size: 15px;
    font-weight: 500;
    opacity: 0.85;
    padding: 6px 0;
    position: relative;
}

.bsk-nav-menu a:hover {
    opacity: 1;
    color: #7c3aed;
}

.bsk-nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: #7c3aed;
    transition: width 0.3s;
}

.bsk-nav-menu a:hover::after { width: 100%; }

.bsk-nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-glass {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-soft);
    color: var(--text-light);
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.25s;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-glass:hover {
    background: #7c3aed;
    border-color: #7c3aed;
    color: #fff;
}

.btn-primary-glass {
    background: linear-gradient(135deg, #7c3aed 0%, #7c3aeddd 100%);
    color: #fff;
    padding: 10px 24px;
    border-radius: 100px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 16px #7c3aed44;
}

.btn-primary-glass:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px #7c3aed66;
}

/* ========== Hero 轮播 ========== */
.bsk-hero {
    position: relative;
    min-height: 580px;
    padding: 100px 32px 60px;
    overflow: hidden;
}

.bsk-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse at 30% 20%, #7c3aed33 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, #7c3aed22 0%, transparent 50%),
        linear-gradient(135deg, #1c1f3f 0%, #000 100%);
}

.bsk-hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.4) 100%);
}

.bsk-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
    padding-top: 40px;
}

.bsk-hero-title {
    font-size: clamp(36px, 5.5vw, 60px);
    font-weight: 800;
    line-height: 1.15;
    color: #fff;
    margin-bottom: 20px;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

.bsk-hero-title span { color: #7c3aed; }

.bsk-hero-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 36px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.bsk-hero-rating {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 24px;
    font-size: 14px;
}

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

/* ========== 通用容器 ========== */
.bsk-section {
    padding: 80px 32px;
    position: relative;
}

.bsk-container {
    max-width: 1280px;
    margin: 0 auto;
}

.bsk-section-title {
    font-size: 32px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-light);
}

.bsk-section-title i { color: #7c3aed; margin-right: 8px; }

.bsk-section-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 48px;
    font-size: 15px;
}

/* ========== About 数据卡 ========== */
.bsk-about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: center;
}

.bsk-about-text h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #7c3aed;
}

.bsk-about-text p {
    color: var(--text-muted);
    line-height: 1.75;
    margin-bottom: 12px;
}

.bsk-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.bsk-stat-card {
    padding: 24px 16px;
    text-align: center;
    border-radius: var(--radius-lg);
}

.bsk-stat-num {
    font-size: 36px;
    font-weight: 800;
    color: #7c3aed;
    line-height: 1;
    margin-bottom: 8px;
}

.bsk-stat-label {
    color: var(--text-muted);
    font-size: 13px;
}

/* ========== 全球热力图 ========== */
.bsk-heatmap {
    position: relative;
    height: 380px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    padding: 32px;
    background: linear-gradient(135deg, #1c1f3fee 0%, rgba(0, 0, 0, 0.6) 100%);
}

.bsk-heat-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background: #7c3aed;
    border-radius: 50%;
    box-shadow: 0 0 24px #7c3aed;
    animation: pulse 2s infinite;
}

.bsk-heat-dot::before {
    content: "";
    position: absolute;
    inset: -8px;
    background: #7c3aed44;
    border-radius: 50%;
    animation: pulse-ring 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.8; }
}

@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(2.5); opacity: 0; }
}

.bsk-heat-dot span {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    color: var(--text-light);
    font-size: 13px;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 500;
}

.bsk-heat-dot.dot-1 { top: 30%; left: 25%; }
.bsk-heat-dot.dot-2 { top: 50%; left: 70%; }
.bsk-heat-dot.dot-3 { top: 25%; left: 50%; }
.bsk-heat-dot.dot-4 { top: 70%; left: 35%; }
.bsk-heat-dot.dot-5 { top: 60%; left: 15%; }

/* ========== 安全体系拓扑 ========== */
.bsk-security-network {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 0;
}

.bsk-security-core {
    grid-column: 2;
    grid-row: 1;
    text-align: center;
    padding: 24px;
    border-radius: var(--radius-xl);
    background: #7c3aed22;
    border: 2px solid #7c3aed;
    position: relative;
    z-index: 2;
}

.bsk-security-core i { font-size: 36px; color: #7c3aed; }
.bsk-security-core div { margin-top: 8px; font-weight: 600; }

.bsk-security-node {
    padding: 20px;
    text-align: center;
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 2;
}

.bsk-security-node i { font-size: 24px; color: #7c3aed; margin-bottom: 8px; }
.bsk-security-node .node-title { font-weight: 600; margin-bottom: 6px; }
.bsk-security-node small { color: var(--text-muted); font-size: 12px; line-height: 1.5; display: block; }

/* ========== FAQ 时间轴 ========== */
.bsk-faq-timeline {
    max-width: 880px;
    margin: 0 auto;
    position: relative;
    padding-left: 56px;
}

.bsk-faq-timeline::before {
    content: "";
    position: absolute;
    left: 24px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(180deg, #7c3aed 0%, transparent 100%);
}

.bsk-faq-step {
    position: relative;
    padding: 20px 24px;
    margin-bottom: 20px;
    border-radius: var(--radius-lg);
}

.bsk-faq-step::before {
    content: "";
    position: absolute;
    left: -44px;
    top: 28px;
    width: 14px;
    height: 14px;
    background: #7c3aed;
    border-radius: 50%;
    box-shadow: 0 0 0 4px #1c1f3f;
}

.bsk-faq-step h5 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-light);
}

.bsk-faq-step p {
    color: var(--text-muted);
    line-height: 1.65;
    font-size: 14px;
}

/* ========== APP 下载区块 ========== */
.bsk-app-section {
    background: linear-gradient(135deg, #7c3aed15 0%, #1c1f3f 100%);
    border-radius: var(--radius-xl);
    padding: 60px 40px;
    margin: 0 32px;
}

.bsk-app-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
}

.bsk-app-rating {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 6px 16px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.08);
    margin-bottom: 20px;
    font-size: 14px;
}

.bsk-app-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.bsk-app-desc {
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
}

.bsk-app-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.bsk-app-badge {
    padding: 6px 14px;
    border: 1px solid var(--border-soft);
    border-radius: 100px;
    font-size: 13px;
    background: rgba(255, 255, 255, 0.05);
}

.bsk-app-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.bsk-app-image {
    text-align: center;
    font-size: 200px;
    color: #7c3aed44;
    line-height: 1;
}

/* ========== 体育头条 5 列卡片 ========== */
.bsk-news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bsk-news-item {
    display: flex;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
    gap: 20px;
}

.bsk-news-item:hover {
    background: var(--bg-card-hover);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.bsk-news-img {
    width: 160px;
    height: 110px;
    flex-shrink: 0;
    background: linear-gradient(135deg, #7c3aed33 0%, #1c1f3f 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #7c3aed;
    overflow: hidden;
}

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

.bsk-news-content { flex: 1; min-width: 0; }

.bsk-news-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bsk-news-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bsk-news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-faint);
}

.bsk-news-read {
    color: #7c3aed;
    font-weight: 600;
    padding: 4px 12px;
    border: 1px solid #7c3aed66;
    border-radius: 100px;
    font-size: 12px;
}

.bsk-news-read:hover { background: #7c3aed; color: #fff; }

/* ========== Footer 4 列 ========== */
.bsk-footer {
    background: linear-gradient(to right, #1c1f3f 0%, #000 100%);
    border-top: 1px solid var(--border-soft);
    padding: 60px 32px 30px;
    color: var(--text-muted);
}

.bsk-footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 24px;
    max-width: 1280px;
    margin: 0 auto 32px;
}

.bsk-footer-card {
    padding: 20px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-soft);
}

.bsk-footer-card h6 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #7c3aed;
    display: flex;
    align-items: center;
    gap: 8px;
}

.bsk-footer-card p,
.bsk-footer-card li {
    font-size: 13px;
    line-height: 1.75;
    color: var(--text-muted);
}

.bsk-footer-card ul { list-style: none; }

.bsk-footer-card a { color: var(--text-muted); }
.bsk-footer-card a:hover { color: #7c3aed; }

.bsk-footer-copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-soft);
    font-size: 13px;
    color: var(--text-faint);
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .bsk-nav { padding: 12px 16px; }
    .bsk-nav-menu { display: none; }
    .bsk-about { grid-template-columns: 1fr; }
    .bsk-app-grid { grid-template-columns: 1fr; }
    .bsk-footer-grid { grid-template-columns: 1fr 1fr; }
    .bsk-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .bsk-hero { padding: 90px 16px 40px; min-height: 480px; }
    .bsk-section { padding: 50px 16px; }
    .bsk-app-section { margin: 0 16px; padding: 40px 20px; }
    .bsk-news-item { flex-direction: column; }
    .bsk-news-img { width: 100%; height: 180px; }
    .bsk-footer { padding: 40px 16px 24px; }
    .bsk-footer-grid { grid-template-columns: 1fr; }
    .bsk-section-title { font-size: 24px; }
    .bsk-app-title { font-size: 26px; }
}