:root {
    --ding-blue: #007fff;
    --dark-blue: #0056b3;
    --text-main: #333;
    --text-light: #666;
    --bg-gray: #f9fbff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
    color: var(--text-main);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    height: 80px;
    display: flex;
    align-items: center;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo { font-size: 22px; font-weight: 800; color: var(--ding-blue); }

.desktop-nav a {
    margin-left: 30px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s;
}

.desktop-nav a:hover { color: var(--ding-blue); }

.nav-cta {
    background: var(--ding-blue);
    color: #fff !important;
    padding: 10px 25px;
    border-radius: 50px;
}

/* Hero */
.hero-v2 {
    padding: 120px 0;
    background: linear-gradient(rgba(0,127,255,0.8), rgba(0,127,255,0.9)), url('assets/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
}

.hero-v2 h1 { font-size: 48px; margin-bottom: 20px; color: #1a202c; }
.hero-v2 p { font-size: 20px; color: var(--text-light); }

/* Tabs Section */
.tabs-section { padding: 80px 0; }
.tab-header { display: flex; justify-content: center; gap: 20px; margin-bottom: 50px; }
.tab-btn {
    padding: 12px 40px;
    border: none;
    background: #f0f2f5;
    color: var(--text-light);
    font-size: 16px;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
}
.tab-btn.active { background: var(--ding-blue); color: #fff; box-shadow: 0 4px 15px rgba(0,127,255,0.3); }

.tab-content { display: none; animation: fadeIn 0.5s ease; }
.tab-content.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Feature Grid More */
.feature-grid-more {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card-v2 {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.feature-card-v2:hover { transform: translateY(-5px); }

.feature-card-v2 h3 { margin-bottom: 15px; color: var(--ding-blue); }

.feature-card-v2 p { color: var(--text-light); font-size: 15px; }

/* Feature Blocks */
.feature-block-v2 { padding: 50px 0; }
.bg-light { background: var(--bg-gray); }

.content-wrapper {
    display: flex;
    align-items: center;
    gap: 80px;
}

.text-side { flex: 1; }
.img-side { flex: 1; }

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0,127,255,0.1);
    color: var(--ding-blue);
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 20px;
}

.text-side h2 { font-size: 32px; margin-bottom: 25px; }
.text-side p { font-size: 18px; color: var(--text-light); margin-bottom: 30px; }

.feature-pills { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.feature-pills span {
    padding: 6px 15px;
    background: #fff;
    border: 1px solid #eee;
    border-radius: 20px;
    font-size: 14px;
}

.scenario {
    padding: 20px;
    background: #fff;
    border-left: 4px solid var(--ding-blue);
    border-radius: 4px;
    font-size: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.placeholder-img {
    height: 400px;
    background: #e2e8f0;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-weight: bold;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* CTA Section */
.final-cta {
    padding: 120px 0;
    text-align: center;
    background: #1a202c;
    color: #fff;
}

.final-cta h2 { font-size: 40px; margin-bottom: 20px; }
.final-cta p { font-size: 18px; opacity: 0.8; margin-bottom: 50px; }

.dl-group .btn-primary-v2 {
    display: inline-block;
    padding: 18px 45px;
    background: var(--ding-blue);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: bold;
    font-size: 18px;
    margin: 10px;
}

.dl-group .btn-outline-v2 {
    display: inline-block;
    padding: 18px 45px;
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: bold;
    font-size: 18px;
    margin: 10px;
}

/* Footer */
footer {
    padding: 60px 0;
    background: #111;
    color: #666;
    border-top: 1px solid #222;
}

.footer-grid { display: flex; justify-content: space-between; align-items: center; }
.footer-grid h4 { color: #fff; margin-bottom: 15px; }
.footer-grid a { color: #666; text-decoration: none; font-size: 14px; transition: color 0.3s; }
.footer-grid a:hover { color: #fff; }
.hub-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.hub-nav a { color: #666; }

/* Status Page & Download Page Styles */
.status-page { padding: 150px 0; text-align: center; }
.status-page h1 { font-size: 100px; color: var(--ding-blue); margin-bottom: 20px; }
.status-page p { font-size: 24px; margin-bottom: 40px; }

.download-page-v2 { padding: 100px 0; text-align: center; }
.dl-options-v2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: 50px; }
.dl-card-v2 { background: #fff; padding: 40px; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.dl-card-v2 h3 { margin-bottom: 20px; color: var(--ding-blue); }

/* Specs Table */
.specs-section { padding: 80px 0; background: #fff; }
.specs-table { width: 100%; border-collapse: collapse; margin-top: 30px; box-shadow: 0 4px 20px rgba(0,0,0,0.05); border-radius: 12px; overflow: hidden; }
.specs-table th, .specs-table td { padding: 20px; text-align: left; border-bottom: 1px solid #eee; }
.specs-table th { background: #f8fafc; color: var(--ding-blue); width: 30%; font-weight: 600; }
.specs-table tr:last-child td { border-bottom: none; }
.specs-table td { color: var(--text-light); }

@media (max-width: 992px) {
    .content-wrapper { flex-direction: column !important; text-align: center; gap: 40px; }
    .feature-pills { justify-content: center; }
    .hero-v2 h1 { font-size: 32px; }
    .tab-header { flex-direction: column; align-items: stretch; }
}