:root {
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-hover: #1768E8;
    --text: #1f2937;
    --muted: #667085;
    --light: #f5f7fb;
    --line: #e5eaf3;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(31, 41, 55, .10);
    --radius: 28px;
    --radius-lg: 36px;
}

* {
    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: var(--text);
    background: #f8faff;
    line-height: 1.75;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229, 234, 243, .85);
}

.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    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;
    color: #172033;
    white-space: nowrap;
}

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

.nav-check {
    display: none;
}

.nav-toggle {
    display: inline-flex;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: #fff;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: #263449;
    border-radius: 10px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.site-nav a {
    display: block;
    padding: 12px 14px;
    color: #344054;
    border-radius: 14px;
    font-size: 15px;
}

.site-nav a.active,
.site-nav a:hover {
    color: var(--blue);
    background: #eef5ff;
}

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

.site-main {
    overflow: hidden;
}

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

.narrow-container {
    width: min(880px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 66px 0;
}

.section-title {
    max-width: 780px;
    margin: 0 auto 30px;
    text-align: center;
}

.section-title .eyebrow,
.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 6px 12px;
    border-radius: 999px;
    background: #eef5ff;
    color: var(--blue);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
}

.section-title h2,
.page-hero h1,
.vpn-saas-hero h1 {
    margin: 14px 0 12px;
    line-height: 1.16;
    color: #101828;
}

.section-title h2 {
    font-size: clamp(28px, 4vw, 44px);
}

.section-title p,
.lead,
.page-summary {
    color: var(--muted);
    font-size: 17px;
}

.gradient-background {
    background: var(--brand-gradient);
}

.vpn-saas-hero {
    position: relative;
    color: #fff;
    background: var(--brand-gradient);
    padding: 58px 0 78px;
    border-bottom-left-radius: 34px;
    border-bottom-right-radius: 34px;
}

.vpn-saas-hero::after {
    content: "";
    position: absolute;
    inset: auto -8% -80px -8%;
    height: 170px;
    background: #f8faff;
    transform: skewY(-4deg);
    transform-origin: left top;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 34px;
    align-items: center;
}

.hero-copy h1 {
    font-size: clamp(36px, 8vw, 64px);
    color: #fff;
    letter-spacing: -.04em;
}

.hero-copy p {
    margin: 0 0 24px;
    color: rgba(255, 255, 255, .88);
    font-size: 18px;
}

.hero-tags,
.float-tags,
.inline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.hero-tags span,
.float-tags span,
.inline-tags span,
.pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.hero-tags span,
.float-tags span {
    background: rgba(255, 255, 255, .17);
    border: 1px solid rgba(255, 255, 255, .30);
    color: #fff;
}

.hero-visual {
    position: relative;
    min-height: 350px;
}

.product-shell {
    position: relative;
    padding: 20px;
    border-radius: 36px;
    background: rgba(255, 255, 255, .16);
    border: 1px solid rgba(255, 255, 255, .28);
    box-shadow: 0 32px 80px rgba(17, 24, 39, .24);
}

.product-shell img {
    width: 100%;
    max-height: 420px;
    object-fit: contain;
    margin: 0 auto;
    border-radius: 28px;
}

.status-card {
    position: absolute;
    display: none;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 18px;
    color: #182235;
    background: rgba(255, 255, 255, .93);
    border: 1px solid rgba(255, 255, 255, .9);
    box-shadow: 0 18px 36px rgba(24, 34, 53, .14);
    font-size: 13px;
    font-weight: 800;
}

.status-card::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #22c55e;
}

.status-1 { left: -10px; top: 14%; }
.status-2 { right: -8px; top: 34%; }
.status-3 { left: 20px; bottom: 14%; }
.status-4 { right: 24px; bottom: 4%; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--blue);
    color: #fff;
    font-weight: 800;
    border: none;
    box-shadow: 0 12px 28px rgba(41, 128, 254, .28);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
    background: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 14px 34px rgba(23, 104, 232, .32);
}

.product-highlights {
    position: relative;
    z-index: 2;
    margin-top: -38px;
}

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

.highlight-card,
.feature-card,
.risk-card,
.faq-item,
.info-card,
.step-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 12px 32px rgba(31, 41, 55, .06);
}

.highlight-card {
    padding: 24px;
}

.highlight-card .tag {
    display: inline-flex;
    padding: 4px 10px;
    background: #eef5ff;
    color: var(--blue);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.highlight-card h3,
.feature-card h3,
.info-card h3,
.risk-card h3,
.step-card h3 {
    margin: 14px 0 8px;
    color: #182235;
}

.highlight-card p,
.feature-card p,
.info-card p,
.risk-card p,
.step-card p {
    margin: 0 0 12px;
    color: var(--muted);
}

.text-link {
    color: var(--blue);
    font-weight: 800;
}

.feature-split,
.vpn-connection-section,
.high-speed-section,
.global-nodes-section,
.multi-device-section,
.encryption-protocol-section {
    display: grid;
    gap: 26px;
    align-items: center;
}

.feature-panel,
.privacy-panel,
.no-log-policy-section,
.safety-panel,
.page-panel {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, .94);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.feature-panel {
    padding: 28px;
}

.feature-panel h2 {
    margin: 12px 0;
    font-size: clamp(26px, 5vw, 42px);
    line-height: 1.18;
}

.feature-panel p {
    color: var(--muted);
}

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

.feature-list li,
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 28px;
    color: #42526b;
}

.feature-list li::before,
.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--blue);
    box-shadow: 0 0 0 5px #eaf3ff;
}

.feature-image {
    position: relative;
    padding: 20px;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #eef5ff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.feature-image img {
    max-height: 430px;
    object-fit: contain;
    margin: 0 auto;
    border-radius: 24px;
}

.high-speed-wrap {
    background: #eef5ff;
    border-radius: 36px;
    padding: 28px;
}

.speed-lines,
.protocol-grid,
.privacy-grid,
.risk-grid,
.info-grid,
.page-grid,
.faq-grid,
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.speed-line {
    padding: 16px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid #dbe8ff;
}

.speed-line strong {
    display: block;
    color: #172033;
}

.speed-line span {
    color: var(--muted);
    font-size: 14px;
}

.global-card {
    padding: 28px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.node-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0;
}

.node-chips span {
    padding: 9px 12px;
    border-radius: 999px;
    background: #f2f5fb;
    color: #44546a;
    font-size: 13px;
    font-weight: 700;
}

.privacy-protection-section {
    background: #fff;
    border-radius: 42px;
    padding: 34px 20px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

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

.privacy-grid .info-card,
.protocol-grid .info-card,
.risk-card,
.step-card,
.faq-item {
    padding: 22px;
}

.no-log-policy-section {
    padding: 28px;
}

.no-log-policy-section .info-grid {
    margin-top: 18px;
}

.multi-device-cards {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.device-card {
    padding: 18px;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--line);
}

.device-card strong {
    display: block;
    color: #172033;
}

.device-card span {
    color: var(--muted);
    font-size: 14px;
}

.tech-panel {
    padding: 24px;
    border-radius: 28px;
    background: #111827;
    color: #fff;
}

.tech-panel h3,
.tech-panel strong {
    color: #fff;
}

.tech-panel p,
.tech-panel span {
    color: rgba(255, 255, 255, .74);
}

.tech-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 14px;
}

.tech-row div {
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .12);
}

.process-steps {
    counter-reset: step;
}

.step-card {
    position: relative;
    padding-top: 48px;
}

.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: 18px;
    left: 22px;
    color: var(--blue);
    font-weight: 900;
    font-size: 18px;
}

.safety-panel {
    padding: 28px;
    background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
}

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

.risk-card .suggestion {
    display: block;
    margin-top: 8px;
    color: #27364d;
    font-weight: 800;
}

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

.faq-item p {
    margin: 0;
    color: var(--muted);
}

.cta-section {
    margin: 54px auto 0;
    width: min(1120px, calc(100% - 32px));
    padding: 42px 24px;
    text-align: center;
    color: #fff;
    border-radius: 38px;
    background: var(--brand-gradient);
    box-shadow: 0 24px 60px rgba(53, 88, 242, .22);
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 44px);
}

.cta-section p {
    margin: 0 auto 22px;
    color: rgba(255, 255, 255, .88);
    max-width: 720px;
}

.page-hero {
    padding: 58px 0 30px;
    background: linear-gradient(180deg, #eef5ff 0%, #f8faff 100%);
}

.page-hero-inner {
    display: grid;
    gap: 18px;
}

.page-hero h1 {
    font-size: clamp(34px, 6vw, 56px);
}

.page-layout {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 38px 0 72px;
    display: grid;
    gap: 22px;
}

.page-panel {
    padding: 28px;
}

.page-panel h2 {
    margin: 0 0 12px;
    font-size: 26px;
}

.page-panel p {
    color: var(--muted);
}

.sidebar-card {
    padding: 24px;
    border-radius: 26px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 30px rgba(31, 41, 55, .06);
}

.sidebar-card h3 {
    margin-top: 0;
}

.sidebar-card a {
    display: block;
    padding: 10px 0;
    color: var(--blue);
    font-weight: 800;
    border-bottom: 1px solid #edf1f7;
}

.download-page-steps {
    display: grid;
    gap: 14px;
    margin: 24px 0;
}

.download-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 18px;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--line);
}

.download-step span {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #eef5ff;
    color: var(--blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    flex: none;
}

.download-step strong {
    display: block;
    color: #172033;
}

.download-step p {
    margin: 4px 0 0;
}

.site-footer {
    background: #101828;
    color: #fff;
    padding: 42px 0;
}

.footer-inner {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.footer-brand {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.footer-brand img {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    object-fit: cover;
}

.footer-brand p,
.footer-note {
    color: rgba(255, 255, 255, .68);
    margin: 6px 0 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, .82);
    font-weight: 700;
}

@media (min-width: 640px) {
    .highlight-grid,
    .info-grid,
    .privacy-grid,
    .risk-grid,
    .faq-grid,
    .process-steps,
    .protocol-grid,
    .page-grid,
    .speed-lines {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .status-card {
        display: inline-flex;
    }
}

@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

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

    .site-nav a {
        padding: 8px 10px;
        font-size: 14px;
    }

    .hero-grid,
    .feature-split,
    .vpn-connection-section,
    .high-speed-section,
    .global-nodes-section,
    .multi-device-section,
    .encryption-protocol-section,
    .privacy-layout,
    .page-layout {
        grid-template-columns: 1.02fr .98fr;
    }

    .hero-copy p {
        max-width: 620px;
    }

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

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

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

    .page-panel {
        padding: 38px;
    }

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

@media (min-width: 1120px) {
    .site-nav a {
        padding: 8px 12px;
    }
}

@media (max-width: 420px) {
    .header-inner {
        width: min(100% - 24px, 1120px);
    }

    .logo span {
        font-size: 15px;
    }

    .section {
        padding: 52px 0;
    }

    .vpn-saas-hero {
        padding-top: 42px;
    }

    .feature-panel,
    .global-card,
    .no-log-policy-section,
    .safety-panel,
    .page-panel {
        padding: 22px;
    }

    .download-btn {
        width: 100%;
    }
}