:root {
    --bg-color: #0b0f19;
    --card-bg: #161c2d;
    --text-color: #ffffff;
    --accent-green: #00ff87;
    --accent-gold: #ffdf00;
    --china-red: #cc0000; 
    --platform-b: #00a2ff; 
    --platform-c: #ff9900; 
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    background-image: linear-gradient(rgba(11, 15, 25, 0.82), rgba(11, 15, 25, 0.82)), url("background.jpeg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 60px;
}

.ticker-wrap {
    background: #101524;
    color: var(--accent-gold);
    padding: 8px 0;
    font-size: 13px;
    text-align: center;
    border-bottom: 1px solid #1e293b;
}

.main-container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero-section {
    flex: 1;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    border: 1px solid #2d3748;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.live-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 0, 0, 0.2);
    border: 1px solid #ff3366;
    color: #ff3366;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 15px;
}

.live-dot {
    width: 8px;
    height: 8px;
    background-color: #ff3366;
    border-radius: 50%;
    margin-right: 6px;
    animation: blink 1.2s infinite;
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.promo-banner {
    width: 100%;
    max-width: 420px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

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

.content-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.channel-container {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid #2d3748;
}

.channel-title {
    text-align: center;
    font-size: 14px;
    color: #94a3b8;
    margin-bottom: 15px;
    font-weight: bold;
}

/* 按钮统一样式 */
.platform-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 15px;
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: transform 0.1s ease, filter 0.2s;
    position: relative;
    overflow: hidden;
    text-align: left;
}

.platform-btn:last-child { margin-bottom: 0; }
.platform-btn:hover { filter: brightness(1.1); }
.platform-btn:active { transform: scale(0.99); }

.btn-a { background: linear-gradient(135deg, var(--china-red), #ff3333); }
.btn-b { background: linear-gradient(135deg, var(--platform-b), #33b5ff); }
.btn-c { background: linear-gradient(135deg, var(--platform-c), #ffb340); }

.btn-text {
    display: flex;
    flex-direction: column;
}

.btn-main-title {
    font-size: 18px;
    font-weight: bold;
    letter-spacing: 0.5px;
}

.btn-subtext {
    font-size: 12px;
    opacity: 0.85;
    margin-top: 2px;
}

.btn-action {
    background: rgba(255, 255, 255, 0.2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: bold;
    white-space: nowrap;
}

.hot-tag {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-gold);
    color: #000;
    font-size: 10px;
    padding: 2px 8px;
    border-bottom-left-radius: 8px;
    font-weight: bold;
}

/* 亮点板块 */
.features {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid #2d3748;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.feature-item:last-child { margin-bottom: 0; }
.feature-icon { color: var(--accent-green); font-size: 18px; margin-right: 12px; }
.feature-text h3 { font-size: 15px; margin-bottom: 2px; }
.feature-text p { font-size: 13px; color: #94a3b8; }

/* 移动端吸底条 */
.sticky-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: rgba(22, 28, 45, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid #2d3748;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 999;
}

.sticky-info { font-size: 12px; }
.sticky-info span { color: var(--accent-green); font-weight: bold; }
.sticky-btn {
    background: var(--accent-green); color: #000;
    padding: 8px 18px; border: none; border-radius: 30px;
    font-weight: bold; font-size: 13px; cursor: pointer;
}

/* 🖥️ 【核心大招】PC端媒体查询大屏适配 */
@media (min-width: 768px) {
    body {
        padding-bottom: 0; /* PC端不需要吸底条的空间 */
    }
    
    .main-container {
        flex-direction: row; /* 关键：变为横向左右双列布局 */
        margin: 50px auto;
        gap: 30px;
    }
    
    .hero-section {
        flex: 5; /* 左侧宣传图占 5 份宽度 */
    }
    
    .content-section {
        flex: 6; /* 右侧表单按钮占 6 份宽度 */
    }
    
    .sticky-bar {
        display: none; /* PC端完美隐藏吸底条 */
    }
}