:root {
    --primary-color: #2ECC71;
    --secondary-color: #F39C12;
    --bg-color: #1c2125;
    --text-color: #ecf0f1;
    --card-bg: #2c3e50;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding-bottom: 90px; /* sticky CTA */
    line-height: 1.6;
}

#lang-bar {
    position: fixed;
    top: 50%;
    left: 0;
    width: 100%;
    text-align: right;
    padding: 8px 20px;
    z-index: 9999;
}

#lang-selector {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

#lang-icon {
    font-size: 24px;
    padding: 6px 20px;
    border-radius: 50%;
    display: inline-block;
    color: #1c2125;
    transition: transform 0.2s ease;
}

#lang-icon:hover {
    transform: scale(1.2);
}

#lang-list {
    display: none;
    position: absolute;
    right: 0;
    background-color: rgba(0,0,0,0.9);
    list-style: none;
    margin: 5px 0 0 0;
    padding: 0;
    border-radius: 6px;
    overflow: hidden;
    min-width: 120px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

#lang-list li {
    padding: 10px 30px;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

#lang-list li:hover {
    background-color: #27AE60;
}


/* 页面容器 */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 20px 20px; /* 顶部留出语言栏空间 */
    text-align: center;
}

h1 { font-size: 28px; line-height: 1.2; margin-bottom:10px; }
.subtitle { color: #bdc3c7; font-size: 18px; margin-bottom:25px; }

/* 视频 */
.visual-proof { margin: 20px 0; }
.visual-proof video { width: 100%; border-radius: 10px; }

/* 倒计时模块 */
#countdown-container {
    background-color: var(--secondary-color);
    color: #1c2125;
    text-align: center;
    padding: 15px 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    margin-bottom: 20px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

#countdown-timer { font-size: 18px; font-weight: bold; margin:0; }

/* 功能列表 */
.features-list { list-style:none; padding:0; margin:30px 0; }
.features-list li {
    background: var(--card-bg);
    padding:15px;
    margin-bottom:10px;
    border-radius:8px;
    font-size:16px;
    display:flex;
    align-items:center;
    text-align:left;
    box-shadow:0 2px 8px rgba(0,0,0,0.3);
}
.features-list li span.check {
    color: var(--primary-color);
    font-size: 20px;
    margin-right: 15px;
}

/* CTA 按钮 */
.cta-button {
    display:block;
    width:90%;
    margin:0 auto;
    padding:15px 0;
    background: var(--primary-color);
    color: var(--bg-color);
    border-radius:30px;
    font-size:20px;
    font-weight:bold;
    text-align:center;
    text-decoration:none;
    transition:0.3s;
    box-shadow:0 0 15px rgba(46,204,113,0.6);
    cursor:pointer;
}
.cta-button:hover {
    background-color: #27AE60;
    transform: translateY(-2px);
}

/* sticky CTA */
.sticky-cta {
    position: fixed;
    bottom:0;
    left:0;
    width:100%;
    background: rgba(0,0,0,0.9);
    padding:1