* {
    box-sizing: border-box;
}

:root {
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-hover: #1768E8;
    --text: #202838;
    --muted: #657083;
    --soft: #F4F7FB;
    --line: #E4E9F2;
    --card: #FFFFFF;
    --deep: #101828;
    --radius-lg: 30px;
    --radius-md: 22px;
    --shadow: 0 16px 45px rgba(32, 40, 56, 0.08);
}

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: #FFFFFF;
    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;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(228, 233, 242, 0.8);
}

.header-inner {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--deep);
    letter-spacing: 0.02em;
}

.logo img,
.footer-logo img {
    width: 38px;
    height: 38px;
    object-fit: cover;
    border-radius: 12px;
}

.nav-toggle {
    display: none;
}

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

.nav-toggle-label span {
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: var(--deep);
}

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

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

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

.site-nav a.active,
.site-nav a:hover {
    color: var(--blue);
    background: #EEF5FF;
}

.gradient-bg,
.vpn-dashboard-hero,
.cta-section {
    background: var(--gradient);
}

.vpn-dashboard-hero {
    color: #FFFFFF;
    padding: 66px 0 42px;
    position: relative;
    overflow: hidden;
}

.vpn-dashboard-hero::after {
    content: "";
    position: absolute;
    inset: auto -90px -160px auto;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    filter: blur(8px);
}

.hero-grid {
    display: grid;
    gap: 32px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 7px 12px;
    border-radius: 999px;
    background: #EEF5FF;
    color: var(--blue);
    font-size: 13px;
    font-weight: 700;
}

.vpn-dashboard-hero .eyebrow {
    background: rgba(255, 255, 255, 0.16);
    color: #FFFFFF;
    border: 1px solid rgba(255, 255, 255, 0.28);
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.22;
    color: var(--deep);
}

.vpn-dashboard-hero h1,
.vpn-dashboard-hero h2,
.cta-section h2,
.cta-section p {
    color: #FFFFFF;
}

h1 {
    font-size: clamp(32px, 8vw, 58px);
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(26px, 5.5vw, 40px);
    letter-spacing: -0.03em;
}

h3 {
    font-size: 20px;
}

.lead,
.section-lead,
.page-summary {
    color: var(--muted);
    font-size: 17px;
    margin: 14px 0 0;
}

.vpn-dashboard-hero .lead {
    color: rgba(255, 255, 255, 0.86);
    max-width: 680px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-top: 24px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--blue);
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(41, 128, 254, 0.26);
    transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.download-btn:hover {
    background: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(23, 104, 232, 0.28);
}

.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.security-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.24);
    color: rgba(255, 255, 255, 0.92);
    font-size: 13px;
}

.hero-console {
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: 0 24px 80px rgba(16, 24, 40, 0.18);
}

.console-window {
    background: rgba(255, 255, 255, 0.94);
    border-radius: 24px;
    padding: 18px;
    color: var(--text);
}

.console-image {
    border-radius: 22px;
    background: #F1F6FF;
    padding: 14px;
    display: grid;
    place-items: center;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.status-card {
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #FFFFFF;
}

.status-card strong {
    display: block;
    color: var(--deep);
    font-size: 14px;
}

.status-card span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    margin-top: 2px;
}

section {
    padding: 58px 0;
}

.section-heading {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 26px;
}

.service-index {
    background: #FFFFFF;
}

.service-index-grid,
.category-grid,
.risk-grid,
.faq-grid,
.feature-grid,
.download-steps,
.tips-grid {
    display: grid;
    gap: 16px;
}

.service-card,
.category-card,
.risk-card,
.faq-item,
.feature-card,
.tip-card,
.step-card,
.policy-card,
.sidebar-card,
.install-step {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: 0 10px 28px rgba(32, 40, 56, 0.04);
}

.service-card {
    min-height: 190px;
}

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

.service-card .tag {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 5px 10px;
    border-radius: 999px;
    background: #EEF5FF;
    font-size: 12px;
}

.service-card p,
.category-card p,
.risk-card p,
.feature-card p,
.tip-card p,
.policy-card p,
.sidebar-card p,
.install-step p,
.faq-item p {
    color: var(--muted);
    margin: 10px 0 0;
}

.service-card .card-link,
.category-card .card-link {
    display: inline-flex;
    margin-top: 14px;
}

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

.high-speed-section,
.no-log-policy-section,
.page-muted {
    background: var(--soft);
}

.split-card,
.vpn-panel,
.privacy-panel,
.protocol-panel,
.node-panel,
.device-panel {
    display: grid;
    gap: 22px;
    align-items: center;
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}

.split-card.alt,
.protocol-panel,
.privacy-panel {
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 100%);
}

.module-image {
    border-radius: 24px;
    background: #F3F7FF;
    padding: 18px;
    min-height: 210px;
    display: grid;
    place-items: center;
}

.check-list,
.clean-list {
    padding: 0;
    list-style: none;
    margin: 18px 0 0;
    display: grid;
    gap: 10px;
}

.check-list li,
.clean-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: #3A4556;
}

.check-list li::before,
.clean-list li::before {
    content: "";
    width: 8px;
    height: 8px;
    margin-top: 10px;
    border-radius: 50%;
    flex: 0 0 auto;
    background: var(--blue);
}

.page-hero {
    padding: 54px 0 36px;
    background: linear-gradient(180deg, #F7FAFF 0%, #FFFFFF 100%);
}

.page-hero-inner {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
}

.page-shell {
    padding: 42px 0 70px;
}

.article-layout {
    display: grid;
    gap: 22px;
}

.article-main {
    display: grid;
    gap: 22px;
}

.content-block {
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 22px;
}

.content-block p {
    color: var(--muted);
    margin: 12px 0 0;
}

.content-block .download-btn,
.download-hero .download-btn,
.page-download-card .download-btn,
.cta-section .download-btn {
    margin-top: 18px;
}

.note-box,
.safety-panel {
    border-radius: var(--radius-md);
    border: 1px solid #CFE0FF;
    background: #F2F7FF;
    padding: 18px;
}

.safety-panel {
    border-left: 5px solid var(--blue);
}

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

.step-card {
    position: relative;
    padding-left: 72px;
}

.step-number {
    position: absolute;
    left: 20px;
    top: 22px;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--blue);
    color: #FFFFFF;
    font-weight: 800;
}

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

.risk-card strong {
    display: block;
    color: var(--deep);
    margin-bottom: 6px;
}

.faq-item h3 {
    font-size: 17px;
}

.cta-section {
    margin: 0 auto 0;
    color: #FFFFFF;
    text-align: center;
    padding: 56px 0;
}

.cta-inner {
    width: min(820px, calc(100% - 32px));
    margin: 0 auto;
}

.page-download-card {
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}

.install-timeline {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.install-step strong {
    color: var(--deep);
}

.site-footer {
    background: #101828;
    color: #D0D5DD;
    padding-top: 48px;
}

.footer-grid {
    display: grid;
    gap: 28px;
}

.footer-logo {
    color: #FFFFFF;
}

.site-footer p {
    color: #AAB3C2;
    margin: 14px 0 0;
}

.site-footer h3 {
    color: #FFFFFF;
    font-size: 16px;
    margin-bottom: 12px;
}

.site-footer a:not(.footer-logo) {
    display: block;
    color: #D0D5DD;
    margin: 7px 0;
    font-size: 14px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    margin-top: 34px;
    padding: 18px;
    text-align: center;
    color: #98A2B3;
    font-size: 14px;
}

@media (min-width: 720px) {
    .container {
        width: min(1120px, calc(100% - 48px));
    }
    .hero-grid,
    .split-card,
    .vpn-panel,
    .privacy-panel,
    .protocol-panel,
    .node-panel,
    .device-panel {
        grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    }
    .split-card.reverse,
    .node-panel.reverse {
        grid-template-columns: minmax(300px, 0.95fr) minmax(0, 1.05fr);
    }
    .split-card.reverse .module-image,
    .node-panel.reverse .module-image {
        order: -1;
    }
    .service-index-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .category-grid,
    .feature-grid,
    .tips-grid,
    .download-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .risk-grid,
    .faq-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, 1fr);
    }
}

@media (min-width: 980px) {
    .nav-toggle-label {
        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;
    }
    .site-nav a {
        font-size: 14px;
        padding: 8px 10px;
    }
    .vpn-dashboard-hero {
        padding: 88px 0 72px;
    }
    .service-index-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .service-index-grid .service-card:nth-child(1),
    .service-index-grid .service-card:nth-child(2) {
        grid-column: span 2;
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        align-items: start;
    }
    .sidebar-stack {
        position: sticky;
        top: 96px;
        display: grid;
        gap: 16px;
    }
    .risk-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .faq-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .process-steps.six-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 380px) {
    .status-grid {
        grid-template-columns: 1fr;
    }
    .download-btn {
        width: 100%;
    }
}