* {
    box-sizing: border-box;
}

:root {
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #202733;
    --muted: #667085;
    --light: #F5F7FB;
    --line: #E6EAF2;
    --card: #FFFFFF;
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --soft-gradient: linear-gradient(135deg, rgba(53,88,242,.08), rgba(184,77,218,.08));
    --shadow: 0 18px 48px rgba(33, 50, 91, .10);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    color: var(--text);
    background: #fff;
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

p {
    margin: 0 0 16px;
}

ul,
ol {
    padding-left: 20px;
    margin-top: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(230,234,242,.86);
}

.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -.02em;
}

.logo img,
.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 10px 22px rgba(41,128,254,.18);
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    padding: 14px;
    display: none;
    flex-direction: column;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.site-nav a {
    padding: 10px 12px;
    color: #344054;
    border-radius: 12px;
    font-size: 15px;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--blue);
    background: #EFF6FF;
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    display: grid;
    place-items: center;
    gap: 0;
    cursor: pointer;
    background: #fff;
}

.nav-toggle-label span {
    width: 20px;
    height: 2px;
    background: #344054;
    display: block;
    margin: 3px 0;
    border-radius: 10px;
}

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

.content-container,
.section-inner,
.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 72px 0;
}

.section-soft {
    background: var(--light);
}

.section-head {
    max-width: 780px;
    margin-bottom: 28px;
}

.section-eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--blue);
    background: #ECF4FF;
    border: 1px solid #D9E9FF;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    padding: 6px 12px;
    margin-bottom: 14px;
}

.section h2,
.page-content h2 {
    font-size: clamp(28px, 4vw, 42px);
    line-height: 1.18;
    margin: 0 0 14px;
    letter-spacing: -.03em;
}

.section-head p,
.lead,
.card p,
.info-card p,
.page-summary {
    color: var(--muted);
}

.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;
    font-size: 16px;
    box-shadow: 0 14px 28px rgba(41,128,254,.28);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
    background: #1768E8;
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(23,104,232,.32);
}

.text-link {
    color: var(--blue);
    font-weight: 700;
    display: inline-flex;
    margin-top: 8px;
}

.text-link:hover {
    color: var(--blue-dark);
}

.vpn-network-hero {
    position: relative;
    color: #fff;
    overflow: hidden;
    background: var(--gradient);
}

.vpn-network-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 18% 20%, rgba(255,255,255,.28) 0 2px, transparent 3px),
        radial-gradient(circle at 72% 35%, rgba(255,255,255,.22) 0 2px, transparent 3px),
        radial-gradient(circle at 86% 70%, rgba(255,255,255,.25) 0 2px, transparent 3px),
        linear-gradient(120deg, transparent 0%, rgba(255,255,255,.12) 48%, transparent 70%);
    opacity: .9;
}

.vpn-network-hero::after {
    content: "";
    position: absolute;
    width: 760px;
    height: 760px;
    right: -260px;
    top: -220px;
    background: radial-gradient(circle, rgba(255,255,255,.22), transparent 68%);
}

.hero-inner {
    position: relative;
    z-index: 1;
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 72px 0 88px;
    display: grid;
    gap: 42px;
}

.hero-copy h1 {
    font-size: clamp(38px, 8vw, 70px);
    line-height: 1.05;
    margin: 0 0 20px;
    letter-spacing: -.05em;
}

.hero-copy p {
    color: rgba(255,255,255,.86);
    font-size: 18px;
    max-width: 660px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0 28px;
}

.hero-tags span,
.floating-label {
    display: inline-flex;
    align-items: center;
    color: #fff;
    background: rgba(255,255,255,.14);
    border: 1px solid rgba(255,255,255,.26);
    border-radius: 999px;
    padding: 8px 12px;
    backdrop-filter: blur(8px);
    font-weight: 700;
    font-size: 14px;
}

.hero-visual {
    position: relative;
    min-height: 340px;
    display: grid;
    place-items: center;
}

.hero-panel {
    position: relative;
    width: min(460px, 100%);
    padding: 18px;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 32px;
    background: rgba(255,255,255,.16);
    box-shadow: 0 28px 80px rgba(13, 29, 82, .25);
    backdrop-filter: blur(16px);
}

.hero-panel img {
    width: 100%;
    border-radius: 26px;
}

.floating-label {
    position: absolute;
    background: rgba(255,255,255,.20);
}

.label-one { top: 16px; left: -8px; }
.label-two { top: 32%; right: -10px; }
.label-three { bottom: 76px; left: -16px; }
.label-four { bottom: 16px; right: 18px; }

.node-overview {
    margin-top: -44px;
    position: relative;
    z-index: 3;
}

.node-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.node-card,
.card,
.info-card,
.step-card,
.risk-card,
.faq-item,
.side-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 14px 36px rgba(33,50,91,.07);
}

.node-card {
    padding: 24px;
}

.node-card .mini-tag,
.card .mini-tag {
    display: inline-flex;
    color: var(--blue);
    background: #ECF4FF;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 800;
    padding: 4px 10px;
    margin-bottom: 12px;
}

.node-card h3,
.card h3,
.info-card h3,
.step-card h3,
.risk-card h3,
.side-card h3 {
    margin: 0 0 8px;
    font-size: 20px;
}

.split-section {
    display: grid;
    gap: 30px;
    align-items: center;
}

.image-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 18px;
    box-shadow: var(--shadow);
}

.image-card img {
    border-radius: 24px;
}

.feature-list {
    display: grid;
    gap: 12px;
    margin: 18px 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 12px 14px;
    color: #475467;
}

.vpn-connection-section {
    background: #fff;
}

.global-nodes-section {
    position: relative;
    background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
    overflow: hidden;
}

.global-nodes-section::before {
    content: "";
    position: absolute;
    inset: 60px 0 auto;
    height: 240px;
    background:
      radial-gradient(circle at 18% 40%, rgba(41,128,254,.20), transparent 8%),
      radial-gradient(circle at 50% 30%, rgba(123,78,241,.18), transparent 8%),
      radial-gradient(circle at 82% 52%, rgba(184,77,218,.16), transparent 8%),
      linear-gradient(90deg, transparent 0%, rgba(41,128,254,.14) 45%, transparent 80%);
    opacity: .8;
    pointer-events: none;
}

.map-panel {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 22px;
}

.node-line-card {
    background: rgba(255,255,255,.86);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.node-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.node-points span {
    color: #344054;
    background: #fff;
    border: 1px solid #DCE8FA;
    border-left: 4px solid var(--blue);
    border-radius: 16px;
    padding: 12px;
    font-weight: 700;
}

.high-speed-section {
    background: #F4F8FF;
}

.speed-lines {
    display: grid;
    gap: 12px;
    margin: 20px 0;
}

.speed-line {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px;
    color: #475467;
}

.speed-line strong {
    color: var(--text);
}

.privacy-protection-section .privacy-panel,
.encryption-protocol-section .tech-panel {
    display: grid;
    gap: 16px;
}

.privacy-tile,
.tech-tile {
    border-radius: 20px;
    border: 1px solid var(--line);
    background: #fff;
    padding: 20px;
}

.privacy-tile span,
.tech-tile span {
    color: var(--blue);
    font-weight: 800;
    font-size: 14px;
}

.no-log-policy-section {
    background: #fff;
}

.card-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: 1fr;
}

.card {
    padding: 24px;
}

.multi-device-section {
    background: var(--soft-gradient);
}

.device-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 18px;
}

.device-pill {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 14px;
    font-weight: 800;
    color: #344054;
}

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

.step-card {
    padding: 22px;
    position: relative;
}

.step-number {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    background: #ECF4FF;
    color: var(--blue);
    border-radius: 14px;
    font-weight: 900;
    margin-bottom: 12px;
}

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

.risk-card {
    padding: 20px;
    border-left: 4px solid var(--blue);
}

.risk-card p {
    color: var(--muted);
}

.risk-card strong {
    color: #344054;
}

.faq-list {
    display: grid;
    gap: 14px;
}

.faq-item {
    padding: 20px;
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 19px;
}

.cta-section {
    padding: 72px 0;
    background: var(--gradient);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 12% 20%, rgba(255,255,255,.22), transparent 28%), radial-gradient(circle at 86% 78%, rgba(255,255,255,.18), transparent 30%);
}

.cta-section .section-inner {
    position: relative;
    z-index: 1;
}

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

.page-hero {
    background: var(--soft-gradient);
    padding: 64px 0 46px;
    border-bottom: 1px solid var(--line);
}

.page-hero h1 {
    margin: 0 0 14px;
    font-size: clamp(34px, 7vw, 58px);
    line-height: 1.12;
    letter-spacing: -.04em;
}

.page-layout {
    display: grid;
    gap: 24px;
    padding: 56px 0;
}

.page-content {
    min-width: 0;
}

.page-content p {
    color: #475467;
}

.page-content h2 {
    font-size: clamp(24px, 3vw, 34px);
    margin-top: 30px;
}

.callout,
.check-list,
.number-list {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 22px;
    box-shadow: 0 12px 30px rgba(33,50,91,.06);
    margin: 22px 0;
}

.check-list ul,
.number-list ol {
    margin-bottom: 0;
}

.side-card {
    padding: 22px;
    align-self: start;
}

.side-card a {
    display: block;
    color: var(--blue);
    font-weight: 800;
    margin: 10px 0;
}

.download-strip {
    margin-top: 28px;
    padding: 24px;
    border-radius: 28px;
    background: linear-gradient(135deg, #F8FBFF, #FFFFFF);
    border: 1px solid var(--line);
}

.download-page-panel {
    display: grid;
    gap: 24px;
    align-items: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.download-page-panel img {
    border-radius: 24px;
}

.site-footer {
    background: #111827;
    color: rgba(255,255,255,.84);
    padding-top: 58px;
}

.footer-inner {
    display: grid;
    gap: 34px;
}

.footer-brand p {
    color: rgba(255,255,255,.66);
    max-width: 420px;
    margin-top: 16px;
}

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

.footer-links h3 {
    color: #fff;
    margin: 0 0 12px;
    font-size: 16px;
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,.68);
    margin: 8px 0;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.10);
    margin-top: 42px;
    padding: 18px 16px;
    text-align: center;
    color: rgba(255,255,255,.58);
}

@media (min-width: 700px) {
    .node-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .card-grid,
    .risk-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .download-page-panel {
        grid-template-columns: 1fr 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        width: auto;
        padding: 0;
        box-shadow: none;
        border: 0;
        background: transparent;
    }

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

    .hero-inner {
        grid-template-columns: minmax(0, 1.06fr) minmax(360px, .94fr);
        align-items: center;
        min-height: 680px;
    }

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

    .split-section,
    .map-panel {
        grid-template-columns: 1fr 1fr;
    }

    .split-section.reverse .image-card {
        order: 2;
    }

    .card-grid.three {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        align-items: start;
    }

    .footer-inner {
        grid-template-columns: .9fr 1.1fr;
        align-items: start;
    }
}

@media (max-width: 520px) {
    .header-inner,
    .content-container,
    .section-inner,
    .footer-inner,
    .hero-inner {
        width: min(100% - 24px, 1180px);
    }

    .section {
        padding: 54px 0;
    }

    .hero-inner {
        padding: 54px 0 72px;
    }

    .hero-copy p {
        font-size: 16px;
    }

    .hero-tags span {
        font-size: 13px;
    }

    .floating-label {
        position: static;
        margin: 8px 6px 0 0;
    }

    .hero-panel {
        padding: 12px;
    }

    .node-points {
        grid-template-columns: 1fr;
    }

    .download-btn {
        width: 100%;
    }

    .footer-bottom {
        text-align: left;
    }
}