/**
 * ============================================================================
 * 游戏科技发卡平台 - 暗黑电竞风全局样式表
 * 文件名: oss.css
 * 版本: 3.0 - 完整版
 * ============================================================================
 */

/* ==================== CSS变量定义 ==================== */
:root {
    /* 背景色系 */
    --bg-primary: #0b111c;
    --bg-dark: #05070a;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-hover: #242f40;
    
    /* 强调色系 - 电竞红 */
    --accent-red: #ff4a4a;
    --accent-red-dark: #e03e3e;
    --accent-red-light: #ff6b6b;
    --accent-red-glow: rgba(255, 74, 74, 0.5);
    --accent-red-glow-strong: rgba(255, 74, 74, 0.8);
    
    /* 文字色系 */
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* 边框与分隔 */
    --border-color: #2d3748;
    --border-light: #374151;
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* 动画与过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-red-glow);
    --shadow-glow-strong: 0 0 40px var(--accent-red-glow), 0 0 80px rgba(255, 74, 74, 0.3);
    
    /* 布局 */
    --container-max: 1200px;
    --header-height: 70px;
}

/* ==================== 基础重置 Reset ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==================== 布局容器 ==================== */
.oss-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.oss-section {
    padding: 60px 0;
}

.oss-section-sm {
    padding: 40px 0;
}

.oss-section-lg {
    padding: 80px 0;
}

/* ==================== 通用标题样式 ==================== */
.oss-section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.oss-section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-red), transparent);
    margin: 15px auto 0;
    border-radius: 2px;
}

.oss-section-title span {
    color: var(--accent-red);
}

.oss-section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: -20px;
    margin-bottom: 40px;
    font-size: 1rem;
}

/* ==================== 顶部导航栏 ==================== */
.oss-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(5, 7, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: transform var(--transition-normal), background var(--transition-normal);
}

.oss-header.hidden {
    transform: translateY(-100%);
}

.oss-header.scrolled {
    background: rgba(5, 7, 10, 0.98);
    box-shadow: var(--shadow-md);
}

.oss-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.oss-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.oss-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.oss-logo span {
    color: var(--accent-red);
}

/* 导航菜单 */
.oss-nav {
    display: flex;
    align-items: center;
    gap: 5px;
}

.oss-nav-item {
    position: relative;
}

.oss-nav-link {
    display: block;
    padding: 10px 18px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--transition-fast);
}

.oss-nav-link:hover,
.oss-nav-link.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.oss-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-red);
    border-radius: 1px;
}

/* 移动端菜单按钮 */
.oss-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    cursor: pointer;
}

.oss-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: 1px;
}

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

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

.oss-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== 面包屑导航 ==================== */
.oss-breadcrumb {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 20px 0;
}

.oss-breadcrumb a {
    color: var(--text-secondary);
}

.oss-breadcrumb a:hover {
    color: var(--accent-red);
}

.oss-breadcrumb span {
    margin: 0 8px;
    color: var(--text-muted);
}

.oss-breadcrumb strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* ==================== Banner区域 ==================== */
.oss-banner {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    margin-top: var(--header-height);
}

.oss-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, var(--accent-red-glow) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.oss-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

.oss-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(5, 7, 10, 0.7) 0%, rgba(5, 7, 10, 0.95) 100%);
}

.oss-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px 20px;
    max-width: 800px;
}

.oss-banner-title {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, #fff 0%, #c0c0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.oss-banner-title span {
    color: var(--accent-red);
    -webkit-text-fill-color: var(--accent-red);
}

.oss-banner-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

/* ==================== 按钮样式 ==================== */
.oss-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.oss-btn-primary {
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-red-glow);
}

.oss-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--accent-red-glow-strong);
}

.oss-btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.oss-btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--accent-red);
}

/* 呼吸灯发光按钮 */
.oss-btn-glow {
    animation: btn-breathing 2s ease-in-out infinite;
}

@keyframes btn-breathing {
    0%, 100% {
        box-shadow: 0 4px 15px var(--accent-red-glow), 0 0 20px var(--accent-red-glow);
    }
    50% {
        box-shadow: 0 6px 30px var(--accent-red-glow-strong), 0 0 40px var(--accent-red-glow-strong);
    }
}

/* ==================== 卡片网格系统 ==================== */
.oss-grid {
    display: grid;
    gap: 25px;
}

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

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

.oss-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 通用卡片 */
.oss-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.oss-card-thumb {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: var(--transition-normal);
}

.oss-card:hover .oss-card-thumb {
    transform: scale(1.05);
}

.oss-card-body {
    padding: 20px;
}

.oss-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.oss-card-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 15px;
}

.oss-card-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-top: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 列表样式 ==================== */
.oss-list-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 15px;
    transition: var(--transition-normal);
}

.oss-list-item:hover {
    border-color: var(--accent-red);
    transform: translateX(5px);
}

.oss-list-thumb {
    width: 160px;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.oss-list-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.oss-list-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.oss-list-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 分页样式 ==================== */
.oss-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.oss-pagination a,
.oss-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    transition: var(--transition-fast);
}

.oss-pagination a:hover {
    background: var(--bg-hover);
    border-color: var(--accent-red);
    color: var(--text-primary);
}

.oss-pagination .current {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: #fff;
}

.oss-pagination .pageinfo {
    background: transparent;
    border: none;
    color: var(--text-muted);
}

/* ==================== 支付图标区 ==================== */
.oss-payment-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.oss-payment-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-payment-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-glow);
}

.oss-payment-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.oss-payment-name {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==================== 统计数据区 ==================== */
.oss-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.oss-stats-item {
    text-align: center;
    padding: 35px 20px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-stats-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-md);
}

.oss-stats-number {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--accent-red);
    line-height: 1;
    margin-bottom: 10px;
    text-shadow: 0 0 20px var(--accent-red-glow);
}

.oss-stats-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ==================== 流程卡片区 ==================== */
.oss-process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.oss-process-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.oss-process-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-red), var(--accent-red-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.oss-process-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.oss-process-card:hover::before {
    transform: scaleX(1);
}

/* 呼吸灯高亮卡片 */
.oss-process-card.highlight {
    border-color: var(--accent-red);
    animation: card-breathing 2s ease-in-out infinite;
}

.oss-process-card.highlight::after {
    content: '推荐';
    position: absolute;
    top: 10px;
    right: -30px;
    background: var(--accent-red);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 4px 30px;
    transform: rotate(45deg);
    box-shadow: 0 2px 10px rgba(255, 74, 74, 0.5);
}

@keyframes card-breathing {
    0%, 100% {
        box-shadow: 0 0 15px var(--accent-red-glow), 0 0 30px rgba(255, 74, 74, 0.2);
    }
    50% {
        box-shadow: 0 0 30px var(--accent-red-glow), 0 0 60px rgba(255, 74, 74, 0.4);
    }
}

.oss-process-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px var(--accent-red-glow);
}

.oss-process-card.highlight .oss-process-icon {
    animation: icon-pulse 2s ease-in-out infinite;
}

@keyframes icon-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.08);
    }
}

.oss-process-step {
    font-size: 0.75rem;
    color: var(--accent-red);
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.oss-process-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.oss-process-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== FAQ折叠面板 ==================== */
.oss-faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.oss-faq-item {
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-normal);
}

.oss-faq-item:hover {
    border-color: var(--border-light);
}

.oss-faq-item.active {
    border-color: var(--accent-red);
}

.oss-faq-question {
    width: 100%;
    padding: 18px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-fast);
}

.oss-faq-question:hover {
    color: var(--accent-red);
}

.oss-faq-icon {
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
    margin-left: 15px;
    transition: var(--transition-normal);
}

.oss-faq-icon::before,
.oss-faq-icon::after {
    content: '';
    position: absolute;
    background: currentColor;
    transition: var(--transition-normal);
}

.oss-faq-icon::before {
    width: 10px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.oss-faq-icon::after {
    width: 2px;
    height: 10px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.oss-faq-item.active .oss-faq-icon {
    transform: rotate(45deg);
}

.oss-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.oss-faq-item.active .oss-faq-answer {
    max-height: 500px;
    padding: 0 22px 18px;
}

.oss-faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.9375rem;
}

/* ==================== 随机推荐轮播 ==================== */
.oss-random-section {
    background: var(--bg-secondary);
    padding: 50px 0;
    overflow: hidden;
}

.oss-random-wrapper {
    position: relative;
    width: 100%;
}

.oss-random-track {
    display: flex;
    gap: 20px;
    animation: scroll-infinite 40s linear infinite;
    width: max-content;
}

.oss-random-track:hover {
    animation-play-state: paused;
}

@keyframes scroll-infinite {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.oss-random-item {
    flex-shrink: 0;
    width: 280px;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-random-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-glow);
}

.oss-random-thumb {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.oss-random-info {
    padding: 15px;
}

.oss-random-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==================== 服务承诺区 ==================== */
.oss-promise-grid {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.oss-promise-item {
    text-align: center;
    max-width: 200px;
}

.oss-promise-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-hover) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    border: 2px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-promise-item:hover .oss-promise-icon {
    border-color: var(--accent-red);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.oss-promise-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.oss-promise-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== 下载引导卡片 ==================== */
.oss-download-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-hover) 100%);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    border: 2px solid var(--accent-red);
    position: relative;
    overflow: hidden;
    animation: download-breathing 2.5s ease-in-out infinite;
}

@keyframes download-breathing {
    0%, 100% {
        box-shadow: 0 0 20px var(--accent-red-glow), 0 0 40px rgba(255, 74, 74, 0.2);
    }
    50% {
        box-shadow: 0 0 40px var(--accent-red-glow), 0 0 80px rgba(255, 74, 74, 0.4);
    }
}

.oss-download-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-red-glow) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.oss-download-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.oss-download-title span {
    color: var(--accent-red);
}

.oss-download-desc {
    color: var(--text-secondary);
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

/* ==================== 文章正文区 ==================== */
.oss-article-section {
    padding: 50px 0;
}

.oss-article-content {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid var(--border-color);
}

.oss-article-content p {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 1.5em;
}

.oss-article-content p:last-child {
    margin-bottom: 0;
}

.oss-article-content h2,
.oss-article-content h3,
.oss-article-content h4 {
    color: var(--text-primary);
    margin: 1.5em 0 0.8em;
    font-weight: 600;
}

.oss-article-content h2 {
    font-size: 1.625rem;
    border-left: 4px solid var(--accent-red);
    padding-left: 15px;
}

.oss-article-content h3 {
    font-size: 1.375rem;
}

.oss-article-content h4 {
    font-size: 1.125rem;
}

.oss-article-content img {
    border-radius: 8px;
    margin: 20px 0;
    max-width: 100%;
}

.oss-article-content a {
    color: var(--accent-red);
    border-bottom: 1px dashed var(--accent-red);
}

.oss-article-content a:hover {
    border-bottom-style: solid;
}

.oss-article-content ul,
.oss-article-content ol {
    margin: 1em 0;
    padding-left: 1.5em;
}

.oss-article-content ul {
    list-style: disc;
}

.oss-article-content ol {
    list-style: decimal;
}

.oss-article-content li {
    margin-bottom: 0.5em;
    color: var(--text-secondary);
}

.oss-article-content blockquote {
    border-left: 4px solid var(--accent-red);
    background: var(--bg-hover);
    padding: 20px 25px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* ==================== 页脚 ==================== */
.oss-footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 50px 0 30px;
}

.oss-footer-content {
    text-align: center;
}

.oss-footer-disclaimer {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.oss-footer-disclaimer h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--accent-red);
}

.oss-footer-disclaimer p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.oss-footer-copyright {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.oss-footer-links {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.oss-footer-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.oss-footer-links a:hover {
    color: var(--accent-red);
}

/* ==================== 动画工具类 ==================== */
.oss-fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.oss-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-red);
}

/* ==================== 响应式媒体查询 ==================== */
@media (max-width: 1024px) {
    .oss-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .oss-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .oss-process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .oss-menu-toggle {
        display: flex;
    }
    
    .oss-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(5, 7, 10, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 5px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .oss-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .oss-nav-link {
        width: 100%;
        text-align: center;
        padding: 15px;
    }
    
    .oss-banner {
        min-height: 300px;
    }
    
    .oss-banner-title {
        font-size: 1.875rem;
    }
    
    .oss-banner-desc {
        font-size: 1rem;
    }
    
    .oss-section-title {
        font-size: 1.5rem;
    }
    
    .oss-grid-2,
    .oss-grid-3,
    .oss-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .oss-list-item {
        flex-direction: column;
    }
    
    .oss-list-thumb {
        width: 100%;
        height: 180px;
    }
    
    .oss-article-content {
        padding: 25px;
    }
    
    .oss-payment-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .oss-payment-item {
        padding: 15px;
    }
    
    .oss-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .oss-stats-item {
        padding: 25px 15px;
    }
    
    .oss-stats-number {
        font-size: 2rem;
    }
    
    .oss-process-grid {
        grid-template-columns: 1fr;
    }
    
    .oss-random-item {
        width: 260px;
    }
    
    .oss-promise-grid {
        gap: 30px;
    }
    
    .oss-download-card {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .oss-container {
        padding: 0 15px;
    }
    
    .oss-section {
        padding: 40px 0;
    }
    
    .oss-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .oss-faq-question {
        padding: 15px 18px;
        font-size: 0.9375rem;
    }
    
    .oss-faq-item.active .oss-faq-answer {
        padding: 0 18px 15px;
    }
    
    .oss-pagination a,
    .oss-pagination span {
        min-width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }
}
/* ==================== 立即安装浮动按钮 ==================== */
.oss-float-btn {
    position: fixed;
    bottom: 20px;
    right: 15px;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.oss-float-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.oss-float-btn a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff4a4a 0%, #e03e3e 100%);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.3;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(255, 74, 74, 0.6);
    animation: float-btn-breathing 2s ease-in-out infinite;
}

.oss-float-btn a:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 25px rgba(255, 74, 74, 0.9);
}

.oss-float-btn a span {
    display: block;
}

@keyframes float-btn-breathing {
    0%, 100% { box-shadow: 0 4px 15px rgba(255, 74, 74, 0.6); }
    50% { box-shadow: 0 6px 25px rgba(255, 74, 74, 0.9); }
}

@media (max-width: 768px) {
    .oss-float-btn {
        bottom: 15px;
        right: 10px;
    }
    .oss-float-btn a {
        width: 45px;
        height: 45px;
        font-size: 11px;
    }
}
/* ==================== 相关资讯卡片 ==================== */
.oss-news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.oss-news-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.oss-news-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-md);
}

.oss-news-thumb {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.oss-news-body {
    padding: 20px;
}

.oss-news-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.5;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.oss-news-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.oss-news-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    gap: 15px;
}

@media (max-width: 768px) {
    .oss-news-grid {
        grid-template-columns: 1fr;
    }
    
    .oss-news-thumb {
        height: 180px;
    }
}