* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: #253047;
    background: #f6f8fc;
    line-height: 1.72;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid #e8edf6;
}

.header-inner {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #1f2b46;
    letter-spacing: 0.02em;
}

.brand img {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    object-fit: cover;
}

.site-nav {
    display: none;
    position: absolute;
    left: 14px;
    right: 14px;
    top: 70px;
    padding: 14px;
    background: #fff;
    border: 1px solid #e8edf6;
    border-radius: 22px;
    box-shadow: 0 16px 40px rgba(39, 52, 82, 0.12);
}

.site-nav a {
    display: block;
    padding: 12px 14px;
    color: #5d667a;
    border-radius: 14px;
    font-size: 15px;
}

.site-nav a:hover,
.site-nav a.active {
    color: #2980FE;
    background: #eef5ff;
}

.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.nav-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 14px;
    border-radius: 999px;
    color: #2980FE;
    background: #eef5ff;
    border: 1px solid #d8e6ff;
    font-weight: 700;
}

.nav-toggle:checked ~ .site-nav {
    display: block;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: #2980FE;
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(41, 128, 254, 0.28);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
    background: #1768E8;
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(23, 104, 232, 0.32);
}

.vpn-saas-hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    border-bottom-left-radius: 36px;
    border-bottom-right-radius: 36px;
}

.vpn-saas-hero::after {
    content: "";
    position: absolute;
    left: -12%;
    right: -12%;
    bottom: -92px;
    height: 180px;
    background: #f6f8fc;
    transform: rotate(-4deg);
    transform-origin: center;
}

.hero-inner {
    position: relative;
    z-index: 1;
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    padding: 64px 0 92px;
    display: grid;
    gap: 38px;
}

.hero-copy h1 {
    margin: 0 0 18px;
    font-size: clamp(34px, 8vw, 62px);
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.hero-copy p {
    margin: 0 0 22px;
    color: rgba(255, 255, 255, .86);
    font-size: 17px;
}

.hero-tags,
.floating-tags,
.soft-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-tags span,
.floating-tags span,
.soft-tags span {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .16);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .24);
    font-size: 13px;
    font-weight: 700;
}

.hero-visual {
    position: relative;
    border-radius: 34px;
    padding: 18px;
    background: rgba(255, 255, 255, .18);
    box-shadow: 0 24px 70px rgba(20, 22, 60, .25);
}

.hero-visual img {
    width: 100%;
    border-radius: 28px;
    background: #fff;
}

.status-card {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: absolute;
    padding: 10px 13px;
    border-radius: 16px;
    background: rgba(255,255,255,.94);
    color: #26314d;
    box-shadow: 0 14px 30px rgba(23,31,74,.18);
    font-size: 13px;
    font-weight: 800;
}

.status-card.one { left: 10px; top: 24px; }
.status-card.two { right: 12px; top: 42%; }
.status-card.three { left: 28px; bottom: 18px; }
.status-card.four { right: 18px; bottom: 8px; }

.section {
    padding: 68px 0;
}

.section.alt {
    background: #eef3fb;
}

.section-head {
    width: min(780px, 100%);
    margin: 0 auto 32px;
    text-align: center;
}

.section-head.left {
    text-align: left;
    margin-left: 0;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    padding: 7px 12px;
    border-radius: 999px;
    color: #2980FE;
    background: #eef5ff;
    border: 1px solid #d7e6ff;
    font-size: 13px;
    font-weight: 800;
}

.section-head h2,
.feature-copy h2,
.page-hero h1 {
    margin: 12px 0 12px;
    color: #1d2740;
    line-height: 1.2;
}

.section-head h2,
.feature-copy h2 {
    font-size: clamp(28px, 5vw, 42px);
}

.section-head p,
.feature-copy p,
.page-hero p {
    color: #667089;
    margin: 0;
}

.product-highlights {
    margin-top: -46px;
    position: relative;
    z-index: 3;
}

.highlight-grid {
    display: grid;
    gap: 16px;
}

.highlight-card,
.info-card,
.risk-card,
.faq-item,
.step-card,
.value-card {
    background: #fff;
    border: 1px solid #e5ebf4;
    border-radius: 26px;
    box-shadow: 0 14px 38px rgba(34, 49, 84, 0.06);
}

.highlight-card {
    padding: 24px;
}

.highlight-card .tag {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 5px 10px;
    border-radius: 999px;
    color: #2980FE;
    background: #eef5ff;
    font-size: 12px;
    font-weight: 800;
}

.highlight-card h3,
.info-card h3,
.risk-card h3,
.step-card h3,
.value-card h3 {
    margin: 0 0 10px;
    color: #1e2943;
}

.highlight-card p,
.info-card p,
.risk-card p,
.step-card p,
.value-card p,
.faq-item p,
.page-card p,
.check-list li,
.text-list li {
    color: #68738a;
    margin: 0;
}

.more-link {
    display: inline-flex;
    margin-top: 14px;
    color: #2980FE;
    font-weight: 800;
}

.feature-grid,
.vpn-connection-section,
.high-speed-section,
.global-nodes-section,
.multi-device-section {
    display: grid;
    gap: 28px;
    align-items: center;
}

.feature-card {
    background: #fff;
    border: 1px solid #e5ebf4;
    border-radius: 34px;
    padding: 18px;
    box-shadow: 0 18px 48px rgba(34, 49, 84, 0.08);
}

.feature-card img {
    border-radius: 26px;
    width: 100%;
}

.feature-list {
    display: grid;
    gap: 12px;
    margin-top: 22px;
}

.feature-list li,
.text-list li,
.check-list li {
    list-style: none;
    position: relative;
    padding-left: 24px;
}

.feature-list li::before,
.text-list li::before,
.check-list li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #2980FE;
    position: absolute;
    left: 0;
    top: 12px;
}

.product-panel {
    padding: 26px;
    border-radius: 34px;
    background: linear-gradient(180deg, #fff 0%, #f4f8ff 100%);
    border: 1px solid #e2e9f5;
}

.speed-metrics,
.node-grid,
.privacy-grid,
.protocol-grid,
.no-log-policy-section,
.risk-grid,
.faq-grid,
.card-grid {
    display: grid;
    gap: 16px;
}

.info-card,
.risk-card,
.step-card,
.value-card,
.page-card {
    padding: 22px;
}

.info-card strong,
.risk-card strong {
    display: block;
    color: #2980FE;
    margin-bottom: 8px;
}

.privacy-protection-section {
    border-radius: 36px;
    padding: 26px;
    background: #fff;
    border: 1px solid #e5ebf4;
    box-shadow: 0 18px 48px rgba(34, 49, 84, .07);
}

.privacy-layout {
    display: grid;
    gap: 24px;
    align-items: center;
}

.privacy-layout img {
    border-radius: 28px;
}

.no-log-policy-section .info-card,
.protocol-grid .info-card {
    border-top: 4px solid #2980FE;
}

.process-steps {
    display: grid;
    gap: 16px;
    counter-reset: step;
}

.step-card {
    position: relative;
    padding-top: 56px;
}

.step-number {
    position: absolute;
    left: 22px;
    top: 18px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #2980FE;
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
}

.risk-card {
    border-left: 4px solid #2980FE;
}

.faq-item {
    padding: 22px;
}

.faq-item h3 {
    margin: 0 0 8px;
    color: #1e2943;
    font-size: 18px;
}

.cta-section {
    padding: 72px 0;
    color: #fff;
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    border-top-left-radius: 38px;
    border-top-right-radius: 38px;
    text-align: center;
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 6vw, 44px);
    line-height: 1.18;
}

.cta-section p {
    width: min(720px, 100%);
    margin: 0 auto 24px;
    color: rgba(255,255,255,.86);
}

.page-hero {
    padding: 54px 0 28px;
    background: linear-gradient(180deg, #ffffff 0%, #f6f8fc 100%);
}

.page-hero .container {
    display: grid;
    gap: 20px;
}

.page-hero h1 {
    font-size: clamp(32px, 7vw, 54px);
    margin-top: 14px;
}

.page-layout {
    display: grid;
    gap: 22px;
    align-items: start;
    padding: 26px 0 72px;
}

.page-card {
    background: #fff;
    border: 1px solid #e5ebf4;
    border-radius: 30px;
    box-shadow: 0 14px 38px rgba(34, 49, 84, 0.06);
}

.page-card h2,
.page-card h3 {
    margin: 0 0 12px;
    color: #1e2943;
}

.page-card + .page-card {
    margin-top: 16px;
}

.page-aside {
    display: grid;
    gap: 16px;
}

.check-list,
.text-list {
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
}

.download-strip {
    margin-top: 18px;
    padding: 22px;
    border-radius: 26px;
    background: #f0f6ff;
    border: 1px solid #d9e8ff;
}

.download-page-panel {
    text-align: center;
    padding: 36px 24px;
}

.download-page-panel p {
    margin-bottom: 20px;
}

.site-footer {
    padding: 52px 0 24px;
    background: #172037;
    color: #c6cedd;
}

.footer-grid {
    display: grid;
    gap: 24px;
}

.footer-brand {
    color: #fff;
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 12px;
}

.site-footer h3 {
    color: #fff;
    margin: 0 0 12px;
}

.site-footer a {
    display: block;
    color: #c6cedd;
    margin: 8px 0;
}

.site-footer a:hover {
    color: #fff;
}

.footer-bottom {
    margin-top: 26px;
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,.1);
    font-size: 14px;
    color: #9ca7bd;
}

@media (min-width: 680px) {
    .highlight-grid,
    .privacy-grid,
    .node-grid,
    .speed-metrics,
    .protocol-grid,
    .risk-grid,
    .card-grid,
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 960px) {
    .nav-trigger {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }

    .site-nav a {
        padding: 9px 11px;
        font-size: 14px;
    }

    .hero-inner,
    .feature-grid,
    .vpn-connection-section,
    .high-speed-section,
    .global-nodes-section,
    .multi-device-section,
    .privacy-layout,
    .page-layout {
        grid-template-columns: 1.05fr .95fr;
    }

    .hero-inner {
        min-height: 650px;
        align-items: center;
        padding-top: 54px;
        padding-bottom: 118px;
    }

    .highlight-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .privacy-grid,
    .no-log-policy-section,
    .protocol-grid,
    .risk-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .faq-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
    }
}