* {
    box-sizing: border-box;
}
:root {
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #1f2937;
    --muted: #657083;
    --soft: #f5f7fb;
    --line: #e6eaf2;
    --card: #ffffff;
    --radius-lg: 32px;
    --radius-md: 24px;
    --shadow: 0 18px 45px rgba(31, 41, 55, 0.09);
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: #f7f9fd;
    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: 20;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}
.header-inner {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #172033;
    letter-spacing: .02em;
}
.brand img {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    object-fit: cover;
}
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
    border-radius: 999px;
    padding: 8px 14px;
    font-weight: 700;
}
.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.site-nav.is-open {
    display: grid;
    gap: 8px;
}
.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: #465266;
    font-size: 14px;
}
.site-nav a:hover {
    background: #eef4ff;
    color: var(--blue);
}
.section {
    padding: 64px 0;
}
.section-header {
    margin-bottom: 26px;
}
.section-eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue);
    background: #eef5ff;
    border: 1px solid #d9e8ff;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 {
    margin: 0 0 14px;
    line-height: 1.25;
    color: #172033;
}
h1 {
    font-size: clamp(34px, 8vw, 60px);
    letter-spacing: -.04em;
}
h2 {
    font-size: clamp(26px, 5vw, 42px);
    letter-spacing: -.03em;
}
h3 {
    font-size: 20px;
}
p {
    margin: 0 0 16px;
    color: var(--muted);
}
.text-link {
    color: var(--blue);
    font-weight: 800;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    border-radius: 999px;
    background: var(--blue);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 30px rgba(41, 128, 254, 0.28);
    transition: transform .2s ease, background .2s ease;
}
.download-btn:hover {
    background: var(--blue-dark);
    transform: translateY(-2px);
}
.network-manager-hero {
    padding: 28px 0 44px;
}
.hero-panel {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 28px;
    padding: 34px 22px;
    border-radius: 34px;
    background: var(--brand-gradient);
    color: #fff;
    box-shadow: 0 22px 60px rgba(76, 85, 232, 0.26);
}
.hero-panel::before {
    content: "";
    position: absolute;
    inset: auto -40px -70px auto;
    width: 260px;
    height: 260px;
    background: rgba(255, 255, 255, .22);
    border-radius: 999px;
    filter: blur(18px);
}
.hero-panel h1,
.hero-panel p {
    color: #fff;
}
.hero-panel p {
    max-width: 650px;
    color: rgba(255, 255, 255, .88);
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin: 22px 0 18px;
}
.security-tags,
.float-tags,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.security-tags span,
.float-tags span,
.tag-row span {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, .16);
    border: 1px solid rgba(255, 255, 255, .25);
    color: #fff;
    font-size: 13px;
}
.hero-visual {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    min-height: 280px;
}
.hero-visual-card {
    position: relative;
    width: min(420px, 100%);
    padding: 18px;
    border-radius: 32px;
    background: rgba(255,255,255,.18);
    border: 1px solid rgba(255,255,255,.28);
    backdrop-filter: blur(10px);
}
.hero-visual-card img {
    border-radius: 24px;
    margin: 0 auto;
}
.float-label {
    position: absolute;
    background: #fff;
    color: #27344b;
    border-radius: 16px;
    padding: 8px 12px;
    box-shadow: 0 12px 26px rgba(15, 23, 42, .14);
    font-size: 13px;
    font-weight: 800;
}
.float-label.one { left: 8px; top: 24px; }
.float-label.two { right: 4px; top: 78px; }
.float-label.three { left: 18px; bottom: 52px; }
.float-label.four { right: 18px; bottom: 18px; }
.daily-scenes {
    display: grid;
    gap: 16px;
}
.scene-card,
.bento-card,
.info-card,
.step-card,
.risk-card,
.faq-item,
.article-card,
.side-panel,
.tip-box,
.download-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 28px rgba(31, 41, 55, .05);
}
.scene-card {
    padding: 22px;
}
.scene-card .label,
.bento-card .label,
.info-card .label {
    color: var(--blue);
    font-weight: 800;
    font-size: 13px;
}
.bento-feature-center {
    display: grid;
    gap: 16px;
}
.bento-card {
    padding: 24px;
    min-height: 190px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.bento-card.large {
    background: linear-gradient(135deg, #ffffff 0%, #f1f6ff 100%);
}
.service-split,
.service-card {
    display: grid;
    gap: 22px;
    align-items: center;
}
.service-panel {
    padding: 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.service-panel img {
    margin: 0 auto;
    border-radius: 26px;
}
.feature-list,
.check-list,
.compact-list {
    display: grid;
    gap: 12px;
    margin: 20px 0;
    padding: 0;
    list-style: none;
}
.feature-list li,
.check-list li,
.compact-list li {
    position: relative;
    padding-left: 28px;
    color: #425066;
}
.feature-list li::before,
.check-list li::before,
.compact-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .65em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--blue);
}
.smart-route-section,
.multi-device-section,
.network-diagnosis-section {
    background: #f0f5fb;
}
.public-wifi-section .wifi-grid,
.privacy-guard-section .privacy-grid,
.account-security-section .account-grid {
    display: grid;
    gap: 16px;
}
.info-card {
    padding: 22px;
}
.safety-panel {
    padding: 26px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
    border: 1px solid #dfe9fb;
}
.process-steps,
.risk-grid,
.faq-grid,
.card-grid,
.related-grid {
    display: grid;
    gap: 16px;
}
.step-card {
    padding: 20px;
}
.step-number {
    width: 38px;
    height: 38px;
    display: inline-grid;
    place-items: center;
    margin-bottom: 12px;
    border-radius: 14px;
    background: #eef5ff;
    color: var(--blue);
    font-weight: 900;
}
.risk-card {
    padding: 20px;
    border-left: 4px solid var(--blue);
}
.faq-item {
    padding: 20px;
}
.faq-item h3 {
    font-size: 18px;
}
.cta-section {
    padding: 70px 0;
}
.cta-panel {
    text-align: center;
    padding: 38px 24px;
    border-radius: 34px;
    background: var(--brand-gradient);
    color: #fff;
    overflow: hidden;
    position: relative;
}
.cta-panel h2,
.cta-panel p {
    color: #fff;
}
.page-hero {
    padding: 56px 0 26px;
}
.page-hero .container {
    display: grid;
    gap: 18px;
}
.page-summary {
    max-width: 820px;
    font-size: 18px;
}
.content-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}
.article-card {
    padding: 24px;
}
.side-panel {
    padding: 22px;
}
.side-panel a,
.footer-grid a {
    display: block;
    color: #526071;
    margin: 8px 0;
}
.tip-box {
    padding: 20px;
    background: #f8fbff;
}
.download-page-grid {
    display: grid;
    gap: 20px;
}
.download-card {
    padding: 26px;
    text-align: center;
}
.site-footer {
    margin-top: 50px;
    padding: 44px 0 26px;
    background: #172033;
    color: #dce5f5;
}
.site-footer p,
.site-footer a,
.footer-bottom {
    color: #aeb9cc;
}
.footer-grid {
    display: grid;
    gap: 24px;
}
.footer-brand {
    font-weight: 900;
    font-size: 22px;
    margin-bottom: 10px;
    color: #fff;
}
.site-footer h3 {
    color: #fff;
    font-size: 16px;
}
.footer-bottom {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,.12);
    font-size: 14px;
}
@media (min-width: 680px) {
    .daily-scenes,
    .card-grid,
    .related-grid,
    .risk-grid,
    .faq-grid,
    .public-wifi-section .wifi-grid,
    .privacy-guard-section .privacy-grid,
    .account-security-section .account-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (min-width: 920px) {
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        background: transparent;
        border: 0;
        box-shadow: none;
    }
    .hero-panel {
        grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
        padding: 56px;
    }
    .daily-scenes {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .bento-feature-center {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-auto-rows: 190px;
    }
    .bento-card.large {
        grid-column: span 2;
        grid-row: span 2;
    }
    .bento-card.wide {
        grid-column: span 2;
    }
    .service-split,
    .download-page-grid,
    .content-layout {
        grid-template-columns: minmax(0, 1fr) 340px;
    }
    .service-split.two-col {
        grid-template-columns: 1fr 1fr;
    }
    .public-wifi-section .wifi-grid,
    .privacy-guard-section .privacy-grid,
    .account-security-section .account-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .risk-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .faq-grid,
    .card-grid,
    .related-grid,
    .footer-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .section {
        padding: 82px 0;
    }
}
@media (max-width: 420px) {
    .container {
        width: min(100% - 24px, 1120px);
    }
    .hero-panel {
        padding: 28px 18px;
        border-radius: 26px;
    }
    .download-btn {
        width: 100%;
    }
    .float-label {
        position: static;
        display: inline-flex;
        margin: 6px 4px 0 0;
    }
    .hero-visual-card {
        padding: 12px;
    }
}