:root {
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #1f2937;
    --muted: #667085;
    --soft: #f4f7fb;
    --line: #e5eaf2;
    --card: #ffffff;
    --radius-lg: 32px;
    --radius-md: 24px;
    --shadow: 0 18px 48px rgba(29, 53, 87, .08);
}
* { 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: var(--text);
    background: #f7f9fc;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(229,234,242,.9);
}
.nav-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand, .footer-brand { display: flex; align-items: center; gap: 12px; }
.logo-img, .footer-logo { width: 40px; height: 40px; object-fit: cover; border-radius: 12px; }
.brand-text { font-weight: 800; letter-spacing: .02em; }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 14px; display: grid; place-content: center; gap: 5px; cursor: pointer; background: #fff; }
.nav-toggle-label span { width: 18px; height: 2px; background: #25324b; display: block; border-radius: 4px; }
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 78px;
    display: none;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .site-nav { display: grid; gap: 8px; }
.site-nav a { padding: 10px 12px; border-radius: 12px; font-size: 14px; color: #42506a; }
.site-nav a.active, .site-nav a:hover { color: var(--blue); background: #edf5ff; }
.container, .section-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 56px 0; }
.section-title { max-width: 760px; margin-bottom: 24px; }
.eyebrow, .badge { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); background: #edf5ff; border: 1px solid #d8e9ff; padding: 5px 12px; border-radius: 999px; font-size: 13px; font-weight: 700; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 14px; color: #142033; }
h1 { font-size: clamp(34px, 7vw, 62px); letter-spacing: -.04em; }
h2 { font-size: clamp(28px, 4.6vw, 42px); letter-spacing: -.03em; }
h3 { font-size: 21px; }
p { margin: 0 0 14px; color: var(--muted); }
.text-link { color: var(--blue); font-weight: 700; display: inline-flex; margin-top: 8px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--blue);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(41,128,254,.24);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.download-btn:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 18px 36px rgba(23,104,232,.26); }
.network-manager-hero { padding: 28px 0 42px; }
.hero-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 28px;
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--gradient);
    color: #fff;
    overflow: hidden;
    position: relative;
}
.hero-shell:before { content: ""; position: absolute; inset: auto -70px -90px auto; width: 260px; height: 260px; border-radius: 50%; background: rgba(255,255,255,.16); filter: blur(8px); }
.hero-content, .hero-visual { position: relative; z-index: 1; }
.hero-content p { color: rgba(255,255,255,.88); font-size: 17px; max-width: 590px; }
.hero-tags, .floating-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 24px; }
.hero-tags span, .floating-tags span, .mini-tags span { background: rgba(255,255,255,.16); color: #fff; border: 1px solid rgba(255,255,255,.26); padding: 7px 12px; border-radius: 999px; font-size: 13px; }
.hero-visual { display: grid; place-items: center; }
.product-card { width: min(420px, 100%); background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.28); border-radius: 34px; padding: 18px; box-shadow: 0 30px 70px rgba(0,0,0,.16); }
.product-card img { border-radius: 26px; width: 100%; }
.status-card { background: rgba(255,255,255,.92); color: #172033; border-radius: 20px; padding: 14px; margin-top: -26px; position: relative; width: min(320px, 92%); box-shadow: 0 20px 40px rgba(0,0,0,.12); }
.status-card strong { display: block; }
.status-card p { color: #5c667a; margin: 2px 0 0; font-size: 14px; }
.daily-scenes { display: grid; gap: 16px; }
.scene-card, .bento-card, .info-card, .risk-card, .faq-item, .step-card, .content-card, .aside-panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(29,53,87,.04);
}
.scene-card .label, .bento-card .label { color: var(--blue); font-weight: 800; font-size: 13px; display: block; margin-bottom: 10px; }
.bento-feature-center { display: grid; gap: 16px; }
.bento-card.large { background: linear-gradient(180deg, #fff 0%, #f3f8ff 100%); }
.feature-split, .feature-panel, .device-layout, .diagnosis-layout, .account-layout { display: grid; gap: 24px; align-items: center; }
.feature-split, .device-layout { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow); }
.feature-media img { border-radius: 28px; border: 1px solid var(--line); background: #fff; }
.bullet-list, .check-list { padding: 0; margin: 16px 0 0; list-style: none; display: grid; gap: 10px; }
.bullet-list li, .check-list li { position: relative; padding-left: 24px; color: #4b5568; }
.bullet-list li:before, .check-list li:before { content: ""; width: 9px; height: 9px; background: var(--blue); border-radius: 50%; position: absolute; left: 0; top: .65em; }
.smart-route-section { background: #eef4fb; }
.route-panel, .wifi-panel, .privacy-panel, .safety-panel { border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); padding: 24px; box-shadow: var(--shadow); }
.route-grid, .wifi-grid, .privacy-grid, .risk-grid, .faq-grid { display: grid; gap: 16px; }
.wifi-showcase { display: grid; gap: 20px; align-items: center; }
.wifi-showcase img { border-radius: 28px; }
.privacy-panel { display: grid; gap: 16px; }
.process-steps { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; padding-left: 64px; }
.step-card:before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 22px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 800; }
.risk-card { border-left: 4px solid var(--blue); }
.cta-section { padding: 56px 0 72px; }
.cta-panel { width: min(920px, calc(100% - 32px)); margin: 0 auto; text-align: center; background: var(--gradient); border-radius: var(--radius-lg); padding: 38px 22px; color: #fff; }
.cta-panel p { color: rgba(255,255,255,.86); max-width: 650px; margin: 0 auto 20px; }
.cta-panel h2 { color: #fff; }
.page-hero { padding: 46px 0 28px; }
.page-hero-card { width: min(980px, calc(100% - 32px)); margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow); }
.page-hero-card.gradient { background: var(--gradient); color: #fff; }
.page-hero-card.gradient h1, .page-hero-card.gradient p { color: #fff; }
.article-layout { width: min(1080px, calc(100% - 32px)); margin: 0 auto 64px; display: grid; gap: 20px; }
.content-card + .content-card { margin-top: 18px; }
.card-grid { display: grid; gap: 16px; margin-top: 20px; }
.inline-panel { background: #f6f9fd; border: 1px solid var(--line); border-radius: 20px; padding: 18px; margin-top: 16px; }
.download-row { margin-top: 22px; }
.faq-item summary { cursor: pointer; font-weight: 800; color: #142033; }
.faq-item p { margin-top: 10px; }
.download-steps { counter-reset: download; list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 12px; }
.download-steps li { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px 16px 16px 58px; position: relative; }
.download-steps li:before { counter-increment: download; content: counter(download); position: absolute; left: 16px; top: 16px; width: 30px; height: 30px; border-radius: 50%; background: #edf5ff; color: var(--blue); display: grid; place-items: center; font-weight: 800; }
.site-footer { background: #101828; color: #fff; padding: 34px 0; }
.footer-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; display: grid; gap: 20px; }
.footer-brand p { color: #c8cfdb; margin: 2px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-links a { color: #d7dfec; font-size: 14px; padding: 6px 0; }
@media (min-width: 700px) {
    .daily-scenes, .route-grid, .wifi-grid, .privacy-grid, .card-grid { 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)); }
}
@media (min-width: 980px) {
    .nav-toggle-label { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: 3px; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .site-nav a { white-space: nowrap; }
    .hero-shell { grid-template-columns: 1.02fr .88fr; padding: 52px; min-height: 560px; }
    .daily-scenes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .bento-feature-center { grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-rows: minmax(190px, auto); }
    .bento-card.large { grid-column: span 2; grid-row: span 2; }
    .bento-card.wide { grid-column: span 2; }
    .feature-split, .feature-panel, .device-layout { grid-template-columns: 1fr 1fr; padding: 34px; }
    .wifi-showcase { grid-template-columns: 1fr .8fr; }
    .privacy-panel { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .diagnosis-layout, .account-layout { grid-template-columns: .9fr 1.1fr; }
    .risk-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .article-layout { grid-template-columns: minmax(0, 1fr) 310px; align-items: start; }
    .footer-shell { grid-template-columns: 1fr auto; align-items: center; }
}
@media (max-width: 420px) {
    .hero-shell, .page-hero-card, .feature-split, .route-panel, .wifi-panel, .device-layout { padding: 22px; border-radius: 24px; }
    .download-btn { width: 100%; }
}