:root {
    --bg: #f5f8fc;
    --text: #1e293b;
    --text2: #5b6b81;
    --primary: #3b82f6;
    --primary2: #2563eb;
    --line: #e6edf5;
    --shadow: 0 12px 36px rgba(37, 99, 235, 0.08);
    --shadow-hover: 0 18px 44px rgba(37, 99, 235, 0.12);
    --radius-xl: 24px;
}

/* 主容器垂直居中偏上 */
.vpn-main-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding-top: 40px;
    padding-bottom: 40px;
    box-sizing: border-box;
}

.vpn-page-inner {
    max-width:1180px;
    margin:0 auto;
    padding:20px;
    box-sizing:border-box;
}

/* 返回按钮 */
.vpn-topbar {
    margin-bottom:24px;
}

.vpn-back-btn {
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:8px 14px;
    color:#2563eb;
    background:#fff;
    border:1px solid #dbeafe;
    border-radius:999px;
    font-weight:600;
    text-decoration:none;
}

/* Hero */
.vpn-hero {
    display:grid;
    grid-template-columns:1fr minmax(360px,460px);
    gap:32px;
    background:#fff;
    padding:40px;
    border-radius:20px;
    box-shadow:var(--shadow);
    margin-bottom:40px;
}

.vpn-hero__content,
.vpn-hero__visual {
    margin:0 auto;
}

.vpn-hero__content {
    text-align:left;
}

.vpn-badge {
    display:inline-flex;
    align-items:center;
    padding:6px 14px;
    background:#eff6ff;
    color:#2563eb;
    border-radius:16px;
    font-weight:700;
    font-size:13px;
    margin-bottom:16px;
}

.vpn-title {
    font-size:36px;
    font-weight:800;
    margin:0 0 12px;
    color:#0f172a;
}

.vpn-subtitle {
    font-size:16px;
    color:var(--text2);
    margin:0 0 20px;
}

/* 小标签 */
.vpn-tags {
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:20px;
}

.vpn-tag {
    background:#eff6ff;
    padding:6px 12px;
    border-radius:16px;
    color:#2563eb;
    font-size:13px;
    font-weight:600;
}

/* 按钮 */
.vpn-action-group {
    display:flex;
    flex-wrap:wrap;
    gap:16px;
    margin:20px 0;
}

.vpn-btn {
    padding:12px 24px;
    font-size:15px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    cursor:pointer;
    font-weight:700;
    min-width:160px;
    text-decoration:none;
}

.vpn-btn i {
    font-size:16px;
}

.vpn-btn--primary {
    background:linear-gradient(135deg,#3b82f6,#2563eb);
    color:#fff;
}

.vpn-btn--ghost {
    background:#f0fdf4;
    color:#16a34a;
    border:1px solid #ccefd8;
}

/* 图片预览 */
.vpn-preview-card {
    max-width:460px;
    margin:0 auto;
}

.vpn-preview-image img {
    width:100%;
    border-radius:14px;
}

/* 安装步骤 */
.vpn-steps-grid {
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:18px;
    justify-content:center;
    margin-top:20px;
}

.vpn-step-card {
    background:linear-gradient(180deg,#fff 0%,#f9fbfe 100%);
    padding:24px 18px;
    border-radius:20px;
    text-align:center;
    transition: all 0.2s ease;
}

.vpn-step-card:hover {
    box-shadow:0 18px 44px rgba(37,99,235,0.12);
    transform:translateY(-2px);
}

.vpn-step-no {
    width:58px;
    height:58px;
    background:linear-gradient(135deg,#dbeafe,#eff6ff);
    border-radius:18px;
    display:flex;
    align-items:center;
    justify-content:center;
    margin:0 auto 16px;
    font-size:22px;
    font-weight:800;
    color:#2563eb;
}

.vpn-step-card h3 {
    font-size:18px;
    font-weight:800;
    margin-bottom:10px;
    color:#0f172a;
}

.vpn-step-card p {
    font-size:14px;
    color:var(--text2);
    line-height:1.8;
}

/* 产品特点卡片 */
.vpn-feature-grid {
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:24px;
    justify-content:center;
    margin-top:20px;
}

.vpn-feature-card {
    text-align:center;
    padding:24px;
    border-radius:20px;
    background:#fff;
    box-shadow:0 12px 30px rgba(37,99,235,0.06);
    transition:all 0.3s ease;
}

.vpn-feature-card:hover {
    box-shadow:0 18px 44px rgba(37,99,235,0.12);
    transform:translateY(-3px);
}

.vpn-feature-icon {
    font-size:36px;
    margin-bottom:14px;
    color:#2563eb;
}

.vpn-feature-card h3 {
    font-size:18px;
    font-weight:800;
    margin-bottom:10px;
    color:#0f172a;
}

.vpn-feature-card p {
    font-size:14px;
    color:#5b6b81;
    line-height:1.6;
}

/* FAQ */
.vpn-block {
    background:#fff;
    padding:30px;
    border-radius:20px;
    box-shadow:0 12px 30px rgba(37,99,235,0.06);
    margin-bottom:40px;
}

.vpn-block__header.center {
    text-align:center;
}

.vpn-faq-grid {
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:18px;
    justify-content:center;
}

.vpn-faq-item {
    background:#fff;
    padding:22px;
    border-radius:20px;
    transition:all 0.2s ease;
}

.vpn-faq-item:hover {
    box-shadow:0 18px 44px rgba(37,99,235,0.12);
    transform:translateY(-2px);
}

.vpn-faq-item h4 {
    font-size:17px;
    font-weight:800;
    margin-bottom:10px;
}

.vpn-faq-item p {
    font-size:14px;
    color:var(--text2);
    line-height:1.8;
}

/* 视频弹窗 */
.video-modal {
    display:none;
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background: rgba(0,0,0,0.6);
    justify-content:center;
    align-items:center;
    z-index:999;
}

.video-modal .video-content {
    background:#fff;
    padding:20px;
    border-radius:14px;
    max-width:800px;
    width:90%;
    position:relative;
}

.video-modal .video-close {
    position:absolute;
    top:8px;
    right:12px;
    font-size:22px;
    font-weight:700;
    cursor:pointer;
}

/* 响应式 */
@media(max-width:1199px){
    .vpn-hero {
        grid-template-columns:1fr;
        text-align:center;
    }

    .vpn-hero__content,
    .vpn-hero__visual {
        max-width:100%;
        margin:0 auto;
    }

    .vpn-steps-grid,
    .vpn-feature-grid,
    .vpn-faq-grid {
        grid-template-columns:repeat(2,1fr);
    }
}

@media(max-width:767px){
    .vpn-hero {
        padding:20px;
    }

    .vpn-block {
        padding:20px;
    }

    .vpn-action-group {
        flex-direction:column;
        align-items:center;
    }

    .vpn-steps-grid,
    .vpn-feature-grid,
    .vpn-faq-grid {
        grid-template-columns:1fr;
    }
}