* {
    box-sizing: border-box;
}
:root {
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #202938;
    --muted: #64748b;
    --light: #f5f7fb;
    --line: #e5eaf2;
    --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 50px rgba(31, 47, 86, .10);
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: #fff;
    line-height: 1.75;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.narrow-container {
    width: min(860px, calc(100% - 32px));
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid rgba(229,234,242,.9);
    backdrop-filter: blur(16px);
}
.nav-wrap {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 22px;
    color: #172033;
}
.logo img {
    width: 38px;
    height: 38px;
    object-fit: cover;
    border-radius: 12px;
}
.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.site-nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 12px;
    color: #405068;
    font-size: 15px;
}
.site-nav a:hover,
.site-nav a.active {
    background: #eef5ff;
    color: var(--blue);
}
.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.nav-toggle-label {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle-label span {
    display: block;
    width: 20px;
    height: 2px;
    background: #233047;
    border-radius: 999px;
}
.nav-toggle:checked ~ .site-nav {
    display: block;
}
.gradient-bg {
    background: var(--gradient);
    color: #fff;
}
.vpn-network-hero {
    position: relative;
    overflow: hidden;
    padding: 70px 0 58px;
}
.hero-orbit {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 72% 22%, rgba(255,255,255,.28) 0 2px, transparent 3px),
        radial-gradient(circle at 82% 66%, rgba(255,255,255,.22) 0 3px, transparent 4px),
        radial-gradient(circle at 54% 46%, rgba(255,255,255,.18) 0 2px, transparent 3px),
        linear-gradient(135deg, transparent 0 28%, rgba(255,255,255,.18) 29%, transparent 30% 52%, rgba(255,255,255,.12) 53%, transparent 54%);
    opacity: .8;
}
.hero-grid {
    position: relative;
    display: grid;
    gap: 42px;
    align-items: center;
}
.eyebrow,
.section-kicker,
.page-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(41,128,254,.10);
    color: var(--blue);
    font-weight: 700;
    font-size: 13px;
}
.eyebrow,
.section-kicker.light {
    background: rgba(255,255,255,.16);
    color: #fff;
}
.hero-copy h1 {
    margin: 18px 0 18px;
    font-size: clamp(34px, 8vw, 64px);
    line-height: 1.08;
    letter-spacing: -1.5px;
}
.hero-copy p {
    max-width: 620px;
    margin: 0 0 26px;
    color: rgba(255,255,255,.88);
    font-size: 17px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    background: var(--blue);
    color: #fff;
    border-radius: 999px;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41,128,254,.25);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    white-space: nowrap;
}
.download-btn:hover {
    background: var(--blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(23,104,232,.28);
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}
.hero-tags span {
    padding: 8px 12px;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 999px;
    background: rgba(255,255,255,.12);
    color: #fff;
    font-size: 14px;
}
.hero-visual {
    position: relative;
    padding: 22px;
    border: 1px solid rgba(255,255,255,.22);
    border-radius: 34px;
    background: rgba(255,255,255,.12);
    box-shadow: 0 28px 70px rgba(21, 28, 78, .20);
}
.hero-visual img {
    width: 100%;
    max-height: 450px;
    object-fit: contain;
    margin: 0 auto;
    filter: drop-shadow(0 24px 36px rgba(26,30,76,.22));
}
.float-card {
    position: absolute;
    padding: 9px 13px;
    border-radius: 999px;
    background: rgba(255,255,255,.95);
    color: #26324c;
    font-size: 13px;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(28, 40, 94, .16);
}
.card-one { left: 6%; top: 12%; }
.card-two { right: 4%; top: 24%; }
.card-three { left: 10%; bottom: 12%; }
.card-four { right: 8%; bottom: 10%; }
.section {
    padding: 70px 0;
}
.soft-bg {
    background: #f6f8fc;
}
.gradient-soft {
    background: var(--soft-gradient);
}
.section-head {
    margin-bottom: 34px;
}
.section-head.centered {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    max-width: 760px;
}
h1, h2, h3, p {
    overflow-wrap: break-word;
}
.section h2,
.article-main h2 {
    margin: 12px 0 14px;
    font-size: clamp(26px, 5vw, 42px);
    line-height: 1.18;
    letter-spacing: -.8px;
}
.section-head p,
.copy-panel p,
.privacy-copy p,
.protocol-layout p,
.article-main p,
.page-hero p {
    color: var(--muted);
}
.node-overview {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.node-card,
.info-card,
.policy-grid article,
.faq-item,
.support-card,
.risk-grid article,
.process-steps article {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(31, 47, 86, .06);
}
.node-card {
    padding: 24px;
}
.node-card span {
    display: inline-flex;
    color: var(--blue);
    font-weight: 900;
    margin-bottom: 10px;
}
.node-card h3,
.policy-grid h3,
.risk-grid h3,
.process-steps h3 {
    margin: 0 0 8px;
    font-size: 20px;
}
.node-card p,
.policy-grid p,
.risk-grid p,
.process-steps p {
    color: var(--muted);
    margin: 0 0 14px;
}
.node-card a,
.text-link,
.policy-grid a,
.risk-grid a,
.process-steps a,
.article-aside a {
    color: var(--blue);
    font-weight: 800;
}
.split-layout,
.privacy-layout,
.protocol-layout,
.nodes-map-layout,
.page-title-grid,
.article-layout,
.two-column-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: center;
}
.image-panel,
.privacy-panel,
.map-card,
.page-hero-card,
.protocol-card {
    border-radius: 30px;
    border: 1px solid var(--line);
    background: #fff;
    padding: 22px;
    box-shadow: var(--shadow);
}
.image-panel img,
.privacy-panel img,
.map-card img,
.page-hero-card img,
.protocol-card img {
    max-height: 360px;
    object-fit: contain;
    margin: 0 auto;
}
.check-list {
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
    margin: 20px 0;
}
.check-list li {
    position: relative;
    padding-left: 28px;
    color: #3a475c;
}
.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--blue);
    box-shadow: inset 0 0 0 4px #d9e9ff;
}
.global-nodes-section {
    position: relative;
    overflow: hidden;
    background: var(--gradient);
    color: #fff;
}
.global-nodes-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 30%, rgba(255,255,255,.25) 0 2px, transparent 3px),
        radial-gradient(circle at 48% 56%, rgba(255,255,255,.22) 0 2px, transparent 3px),
        radial-gradient(circle at 78% 26%, rgba(255,255,255,.20) 0 3px, transparent 4px),
        linear-gradient(25deg, transparent 0 35%, rgba(255,255,255,.14) 36%, transparent 37% 68%, rgba(255,255,255,.10) 69%, transparent 70%);
    opacity: .9;
}
.nodes-map-layout {
    position: relative;
}
.global-nodes-section h2,
.global-nodes-section p {
    color: #fff;
}
.mini-cards {
    display: grid;
    gap: 12px;
    margin: 22px 0;
}
.mini-cards div {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255,255,255,.14);
    border: 1px solid rgba(255,255,255,.22);
}
.mini-cards strong,
.mini-cards span {
    display: block;
}
.mini-cards span {
    color: rgba(255,255,255,.82);
    font-size: 14px;
}
.text-link.light {
    color: #fff;
}
.speed-lines {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}
.speed-lines span,
.privacy-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    background: #eef5ff;
    color: var(--blue);
    font-weight: 800;
    font-size: 13px;
}
.privacy-panel {
    background: linear-gradient(180deg, #fff, #f7faff);
}
.privacy-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}
.policy-grid,
.risk-grid,
.support-grid,
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.policy-grid article,
.risk-grid article,
.process-steps article {
    padding: 24px;
}
.protocol-card {
    display: grid;
    gap: 12px;
}
.protocol-card div {
    padding: 16px;
    border-radius: 18px;
    background: #f6f9ff;
}
.protocol-card strong,
.protocol-card span {
    display: block;
}
.protocol-card span {
    color: var(--muted);
}
.process-steps article {
    position: relative;
}
.process-steps article > span {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--blue);
    color: #fff;
    font-weight: 900;
    margin-bottom: 14px;
}
.risk-grid article {
    border-left: 4px solid var(--blue);
}
.risk-grid strong {
    display: block;
    margin: 12px 0;
    color: #2d3a50;
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item {
    padding: 22px;
}
.faq-item h2,
.faq-item h3 {
    margin: 0 0 8px;
    font-size: 19px;
}
.faq-item p {
    margin: 0;
    color: var(--muted);
}
.center-link {
    text-align: center;
    margin-top: 24px;
}
.cta-section {
    text-align: center;
}
.cta-content {
    max-width: 780px;
}
.cta-section h2 {
    color: #fff;
}
.cta-section p {
    color: rgba(255,255,255,.86);
    margin-bottom: 26px;
}
.page-hero {
    padding: 58px 0;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
    border-bottom: 1px solid var(--line);
}
.compact-hero {
    text-align: center;
}
.page-hero h1 {
    margin: 14px 0 14px;
    font-size: clamp(34px, 7vw, 54px);
    line-height: 1.15;
    letter-spacing: -1px;
}
.page-hero p {
    margin: 0 auto 24px;
    max-width: 740px;
}
.simple-page-hero .page-hero-card {
    background: var(--soft-gradient);
}
.article-section {
    background: #fff;
}
.article-layout {
    align-items: start;
}
.article-main {
    min-width: 0;
}
.article-main h2 {
    font-size: clamp(24px, 4vw, 34px);
    margin-top: 0;
}
.article-main p {
    margin: 0 0 24px;
}
.article-aside {
    background: #f7f9fd;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 22px;
}
.article-aside h3 {
    margin: 0 0 12px;
}
.article-aside a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}
.aside-note {
    margin-top: 16px;
    padding: 14px;
    border-radius: 16px;
    background: #fff;
    color: var(--muted);
    font-size: 14px;
}
.support-grid {
    margin-top: 28px;
}
.support-card {
    padding: 18px;
    border-radius: 20px;
}
.support-card strong,
.support-card span {
    display: block;
}
.support-card span {
    color: var(--muted);
    margin-top: 4px;
}
.info-card {
    padding: 26px;
}
.large-card h2 {
    margin-top: 0;
}
.number-list {
    padding-left: 20px;
    color: var(--muted);
}
.number-list li {
    margin-bottom: 12px;
}
.full-faq .faq-item h2 {
    color: #1f2a44;
}
.site-footer {
    background: #111827;
    color: #d7deeb;
    padding: 56px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
}
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 900;
    font-size: 22px;
}
.footer-brand img {
    width: 34px;
    height: 34px;
    object-fit: cover;
    border-radius: 10px;
}
.site-footer p {
    color: #a8b3c7;
    margin: 14px 0 0;
}
.site-footer h3 {
    margin: 0 0 12px;
    color: #fff;
}
.site-footer a {
    display: block;
    color: #a8b3c7;
    padding: 5px 0;
}
.site-footer a:hover {
    color: #fff;
}
.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 26px;
    margin-top: 32px;
    border-top: 1px solid rgba(255,255,255,.10);
    color: #93a0b7;
    font-size: 14px;
}
.variant-map .support-card { background: #f5f9ff; }
.variant-speed .support-card { border-top: 3px solid var(--blue); }
.variant-protocol .support-card { background: linear-gradient(180deg, #fff, #f7faff); }
.variant-devices .support-card { background: #fbfcff; }
@media (min-width: 680px) {
    .node-overview,
    .policy-grid,
    .risk-grid,
    .support-grid,
    .process-steps,
    .two-column-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .mini-cards {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (min-width: 960px) {
    .nav-toggle-label {
        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 {
        display: inline-flex;
        padding: 8px 11px;
        font-size: 14px;
    }
    .hero-grid,
    .split-layout,
    .privacy-layout,
    .protocol-layout,
    .nodes-map-layout,
    .page-title-grid {
        grid-template-columns: 1.02fr .98fr;
    }
    .split-layout.reverse {
        grid-template-columns: .98fr 1.02fr;
    }
    .split-layout.reverse .copy-panel {
        order: 1;
    }
    .split-layout.reverse .image-panel {
        order: 2;
    }
    .node-overview {
        grid-template-columns: repeat(4, 1fr);
    }
    .risk-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
    }
    .footer-grid {
        grid-template-columns: 1.5fr repeat(3, 1fr);
    }
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
    .vpn-network-hero {
        padding: 96px 0 82px;
    }
}
@media (max-width: 420px) {
    .container,
    .narrow-container {
        width: min(100% - 24px, 1120px);
    }
    .section {
        padding: 52px 0;
    }
    .download-btn {
        width: 100%;
        min-height: 52px;
    }
    .float-card {
        font-size: 12px;
        padding: 7px 10px;
    }
    .hero-visual,
    .image-panel,
    .privacy-panel,
    .map-card,
    .page-hero-card,
    .protocol-card {
        border-radius: 24px;
        padding: 16px;
    }
}