* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: #1f2937;
    background: #f7f9fc;
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

p {
    color: #556070;
    margin: 0 0 16px;
}

h1, h2, h3 {
    color: #111827;
    line-height: 1.18;
    margin: 0 0 16px;
}

h1 {
    font-size: clamp(34px, 8vw, 64px);
    letter-spacing: -1.6px;
}

h2 {
    font-size: clamp(26px, 5vw, 42px);
    letter-spacing: -0.8px;
}

h3 {
    font-size: 20px;
}

ul, ol {
    margin: 0;
    padding-left: 20px;
    color: #556070;
}

li {
    margin: 8px 0;
}

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

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

.section {
    padding: 64px 0;
}

.section-soft {
    background: #eef4ff;
}

.gradient-background {
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 30px;
    padding: 5px 12px;
    border-radius: 999px;
    color: #165bdc;
    background: #eaf2ff;
    border: 1px solid #d7e6ff;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 14px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid #e8edf5;
}

.header-inner {
    width: min(1180px, calc(100% - 28px));
    min-height: 70px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #102033;
    white-space: nowrap;
}

.logo-img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 10px 24px rgba(41, 128, 254, 0.18);
}

.brand-text {
    font-size: 18px;
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid #dbe4f0;
    background: #fff;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 11px;
    cursor: pointer;
}

.nav-toggle span {
    height: 2px;
    width: 100%;
    background: #1f2937;
    border-radius: 99px;
}

.site-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 76px;
    display: none;
    flex-direction: column;
    padding: 12px;
    border: 1px solid #e5ebf4;
    background: #fff;
    border-radius: 22px;
    box-shadow: 0 20px 55px rgba(15, 35, 75, 0.12);
}

.site-nav.is-open {
    display: flex;
}

.site-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: #526074;
    font-size: 15px;
    font-weight: 650;
}

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

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: #2980FE;
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.2px;
    box-shadow: 0 14px 30px rgba(41, 128, 254, 0.28);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
    background: #1768E8;
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(23, 104, 232, 0.32);
}

.text-link {
    color: #2980FE;
    font-weight: 800;
}

.vpn-dashboard-hero {
    padding: 54px 0 68px;
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.vpn-dashboard-hero::before,
.vpn-dashboard-hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    filter: blur(4px);
}

.vpn-dashboard-hero::before {
    width: 220px;
    height: 220px;
    right: -80px;
    top: 20px;
}

.vpn-dashboard-hero::after {
    width: 160px;
    height: 160px;
    left: -80px;
    bottom: 30px;
}

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

.hero-copy h1,
.hero-copy p {
    color: #fff;
}

.hero-copy p {
    font-size: 18px;
    max-width: 640px;
    opacity: 0.92;
}

.hero-tags,
.panel-tags,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 22px;
}

.hero-tags span,
.panel-tags span,
.tag-row span {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.24);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
}

.dashboard-panel {
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 30px;
    padding: 18px;
    box-shadow: 0 24px 70px rgba(19, 31, 74, 0.24);
    backdrop-filter: blur(16px);
}

.product-frame {
    background: #fff;
    border-radius: 26px;
    padding: 16px;
}

.product-frame img {
    border-radius: 20px;
    margin: auto;
}

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

.status-card {
    background: rgba(255, 255, 255, 0.92);
    color: #26364a;
    border-radius: 20px;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.status-card strong {
    display: block;
    color: #152238;
    margin-bottom: 4px;
}

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

.service-index-grid,
.privacy-summary,
.category-grid {
    display: grid;
    gap: 16px;
}

.service-card,
.summary-card,
.security-card,
.info-card,
.faq-item,
.risk-card,
.step-card,
.side-card,
.article-card {
    background: #fff;
    border: 1px solid #e6edf6;
    border-radius: 24px;
    box-shadow: 0 16px 45px rgba(30, 58, 138, 0.06);
}

.service-card,
.summary-card,
.security-card,
.info-card {
    padding: 22px;
}

.service-card .label {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eaf2ff;
    color: #2980FE;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 12px;
}

.service-card p,
.summary-card p {
    font-size: 15px;
}

.split-section {
    display: grid;
    gap: 26px;
    align-items: center;
}

.split-section.reverse .visual-card {
    order: -1;
}

.visual-card {
    background: #fff;
    border: 1px solid #e6edf6;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 22px 55px rgba(30, 58, 138, 0.08);
}

.visual-card img {
    max-height: 420px;
    object-fit: contain;
    margin: auto;
    border-radius: 22px;
}

.vpn-connection-section,
.global-nodes-section,
.high-speed-section,
.privacy-protection-section,
.multi-device-section,
.no-log-policy-section,
.encryption-protocol-section {
    position: relative;
}

.feature-list {
    display: grid;
    gap: 12px;
    margin: 22px 0 8px;
}

.feature-list div,
.protocol-tile,
.node-tile {
    padding: 16px;
    border-radius: 18px;
    background: #f7faff;
    border: 1px solid #e4edf9;
}

.feature-list strong {
    display: block;
    color: #172033;
    margin-bottom: 4px;
}

.safety-panel {
    display: grid;
    gap: 16px;
    padding: 22px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid #e5edf7;
    box-shadow: 0 22px 55px rgba(30, 58, 138, 0.07);
}

.safety-panel h3 {
    margin-bottom: 6px;
}

.panel-blue {
    border-left: 5px solid #2980FE;
}

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

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

.step-number {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: #2980FE;
    color: #fff;
    font-weight: 900;
    margin-bottom: 12px;
}

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

.risk-card {
    padding: 20px;
    border-left: 4px solid #2980FE;
}

.risk-card em {
    display: block;
    font-style: normal;
    color: #2980FE;
    font-weight: 800;
    margin-top: 10px;
}

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

.faq-item {
    padding: 20px;
}

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

.cta-section {
    padding: 60px 0;
    text-align: center;
    color: #fff;
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
}

.cta-section h2,
.cta-section p {
    color: #fff;
}

.cta-section p {
    max-width: 680px;
    margin: 0 auto 24px;
    opacity: 0.92;
}

.page-hero {
    padding: 58px 0 34px;
    background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 100%);
}

.page-hero .narrow-container {
    text-align: center;
}

.page-summary {
    font-size: 18px;
    color: #566274;
    max-width: 760px;
    margin: 0 auto;
}

.content-layout {
    display: grid;
    gap: 24px;
    align-items: start;
}

.article-card {
    padding: 24px;
}

.article-card h2 {
    font-size: 24px;
    margin-top: 18px;
}

.article-card h2:first-child {
    margin-top: 0;
}

.side-card {
    padding: 22px;
}

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

.check-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 10px;
}

.check-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: #f5f8fd;
    border: 1px solid #e8eef6;
}

.download-page-card {
    padding: 28px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid #e6edf6;
    box-shadow: 0 22px 55px rgba(30, 58, 138, 0.08);
}

.download-steps {
    display: grid;
    gap: 14px;
    margin: 26px 0;
}

.download-step {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 14px;
    align-items: start;
    padding: 18px;
    background: #f7faff;
    border: 1px solid #e5eef9;
    border-radius: 20px;
}

.download-step span {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: #2980FE;
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
}

.site-footer {
    background: #101828;
    color: #d7deea;
    padding: 48px 0 22px;
}

.footer-grid {
    display: grid;
    gap: 26px;
}

.footer-grid h3,
.footer-grid strong {
    color: #fff;
}

.footer-grid p {
    color: #aab4c3;
}

.footer-grid a {
    display: block;
    color: #aab4c3;
    margin: 8px 0;
}

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

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-logo {
    width: 34px;
    height: 34px;
    border-radius: 10px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 34px;
    padding-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: #94a3b8;
    font-size: 14px;
}

@media (min-width: 640px) {
    .status-grid,
    .privacy-summary,
    .risk-grid,
    .download-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .service-index-grid,
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 860px) {
    .section {
        padding: 86px 0;
    }

    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        border-radius: 0;
    }

    .site-nav a {
        padding: 9px 10px;
        font-size: 14px;
    }

    .hero-grid,
    .split-section,
    .content-layout {
        grid-template-columns: 1.05fr 0.95fr;
    }

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

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

    .service-card.large {
        grid-column: span 2;
    }

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

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

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

    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 1080px) {
    .vpn-dashboard-hero {
        padding: 82px 0 96px;
    }

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

    .site-nav a {
        padding: 9px 12px;
    }
}