:root {
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #263246;
    --muted: #687386;
    --light: #F5F7FB;
    --line: #E7ECF4;
    --white: #FFFFFF;
    --radius: 28px;
    --shadow: 0 16px 48px rgba(39, 71, 125, 0.10);
}
* { 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: #F8FAFE;
    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: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(231,236,244,0.85);
}
.header-inner {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    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; white-space: nowrap; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; box-shadow: 0 8px 20px rgba(41,128,254,0.18); }
.site-nav { display: none; flex-direction: column; position: absolute; left: 14px; right: 14px; top: 70px; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.site-nav a { padding: 10px 12px; border-radius: 14px; color: #39465C; font-size: 15px; }
.site-nav a:hover { background: #F0F5FF; color: var(--blue); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label { border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; color: var(--blue); font-weight: 700; background: #fff; }
.nav-toggle:checked ~ .site-nav { display: flex; }
.section { padding: 58px 0; }
.section-title { max-width: 760px; margin: 0 auto 28px; text-align: center; }
.section-title .eyebrow, .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); background: #EEF5FF; border: 1px solid #D9E8FF; padding: 5px 12px; border-radius: 999px; font-size: 14px; font-weight: 700; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; color: #172033; }
h1 { font-size: clamp(32px, 8vw, 64px); letter-spacing: -0.04em; }
h2 { font-size: clamp(25px, 5vw, 42px); letter-spacing: -0.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.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; box-shadow: 0 14px 28px rgba(41,128,254,0.24); transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.download-btn:hover { background: #1768E8; transform: translateY(-2px); box-shadow: 0 18px 36px rgba(23,104,232,0.28); }
.network-manager-hero { padding: 22px 0 54px; }
.hero-shell { background: var(--brand-gradient); border-radius: 36px; padding: 28px; color: #fff; overflow: hidden; position: relative; box-shadow: 0 28px 80px rgba(83,76,220,0.25); }
.hero-shell:before { content: ""; position: absolute; width: 360px; height: 360px; right: -120px; top: -120px; border-radius: 50%; background: rgba(255,255,255,0.18); filter: blur(2px); }
.hero-content { position: relative; display: grid; gap: 28px; align-items: center; }
.hero-copy h1, .hero-copy p { color: #fff; }
.hero-copy p { font-size: 17px; opacity: .92; max-width: 640px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 22px; }
.hero-tags span, .floating-tag { padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,0.25); color: #fff; font-weight: 700; font-size: 13px; }
.hero-visual { position: relative; min-height: 310px; display: grid; place-items: center; }
.hero-card { width: min(360px, 92%); border-radius: 32px; padding: 18px; background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.28); box-shadow: 0 24px 70px rgba(18,28,72,0.22); }
.hero-card img { border-radius: 24px; margin: 0 auto; }
.float-one { position: absolute; left: 2%; top: 12%; }
.float-two { position: absolute; right: 0; top: 20%; }
.float-three { position: absolute; left: 8%; bottom: 12%; }
.float-four { position: absolute; right: 4%; bottom: 18%; }
.daily-scenes { display: grid; gap: 16px; }
.scene-card, .bento-card, .info-card, .risk-card, .faq-item, .step-card, .page-panel, .side-card, .download-panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 34px rgba(36,64,100,0.06); }
.scene-card { padding: 22px; }
.card-label { color: var(--blue); font-weight: 800; font-size: 13px; display: inline-block; margin-bottom: 8px; }
.text-link { color: var(--blue); font-weight: 800; display: inline-flex; margin-top: 6px; }
.bento-feature-center { display: grid; gap: 16px; }
.bento-card { padding: 24px; min-height: 190px; position: relative; overflow: hidden; }
.bento-card:after { content: ""; position: absolute; right: -40px; bottom: -50px; width: 150px; height: 150px; border-radius: 50%; background: #EEF5FF; }
.bento-card > * { position: relative; z-index: 1; }
.feature-split, .smart-route-section .feature-split, .multi-device-section .feature-split { display: grid; gap: 22px; align-items: center; }
.feature-panel { padding: 26px; border-radius: 34px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.feature-panel img { border-radius: 26px; margin: 0 auto; }
.point-list { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.point-list li { padding: 12px 14px; border-radius: 16px; background: #F4F8FF; color: #40506A; }
.smart-route-section { background: #F2F6FC; }
.route-cards, .privacy-cards, .wifi-cards, .risk-grid, .process-steps, .check-grid { display: grid; gap: 16px; }
.info-card { padding: 22px; }
.public-wifi-section .wifi-panel { background: #fff; border: 1px solid var(--line); border-radius: 34px; padding: 24px; box-shadow: var(--shadow); }
.wifi-image { border-radius: 30px; background: #F3F7FF; padding: 18px; margin-top: 18px; }
.privacy-guard-section .privacy-wrap { background: linear-gradient(180deg,#FFFFFF 0%,#F2F6FF 100%); border: 1px solid var(--line); border-radius: 34px; padding: 24px; }
.device-stack { display: grid; gap: 14px; }
.device-card { display: flex; gap: 12px; align-items: flex-start; padding: 16px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.device-dot { flex: 0 0 34px; height: 34px; display: grid; place-items: center; color: var(--blue); font-weight: 900; border-radius: 12px; background: #EEF5FF; }
.diagnosis-board { background: #172033; color: #fff; border-radius: 34px; padding: 26px; box-shadow: var(--shadow); }
.diagnosis-board h2, .diagnosis-board p { color: #fff; }
.diagnosis-board .step-card { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.15); box-shadow: none; }
.diagnosis-board .step-card p, .diagnosis-board .step-card h3 { color: #fff; }
.account-security-section .check-grid .info-card { border-left: 5px solid var(--blue); }
.step-card { padding: 20px; }
.step-num { width: 36px; height: 36px; border-radius: 14px; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 900; margin-bottom: 12px; }
.risk-card { padding: 20px; border-top: 4px solid var(--blue); }
.faq-list { display: grid; gap: 14px; max-width: 900px; margin: 0 auto; }
.faq-item { padding: 20px; }
.faq-item summary { cursor: pointer; font-weight: 800; color: #172033; }
.faq-item p { margin-top: 12px; }
.cta-section { padding: 58px 0 70px; }
.download-panel { background: var(--brand-gradient); color: #fff; text-align: center; padding: 36px 24px; overflow: hidden; }
.download-panel h2, .download-panel p { color: #fff; }
.page-hero { padding: 42px 0 24px; }
.page-hero-inner { background: linear-gradient(135deg,#FFFFFF 0%,#F0F5FF 100%); border: 1px solid var(--line); border-radius: 34px; padding: 28px; }
.page-layout { display: grid; gap: 22px; align-items: start; }
.page-main { display: grid; gap: 18px; }
.page-panel { padding: 24px; }
.page-panel ul, .page-panel ol { margin: 12px 0 0; padding-left: 20px; color: var(--muted); }
.side-card { padding: 22px; }
.side-card a { display: block; padding: 10px 0; color: var(--blue); font-weight: 800; border-bottom: 1px solid var(--line); }
.side-card a:last-child { border-bottom: 0; }
.download-page-grid { display: grid; gap: 18px; }
.site-footer { background: #101829; color: #C9D2E3; padding: 42px 0 20px; }
.site-footer h3, .footer-brand { color: #fff; }
.footer-brand { font-size: 22px; font-weight: 900; margin-bottom: 10px; }
.footer-grid { display: grid; gap: 22px; }
.site-footer a { display: block; color: #C9D2E3; padding: 5px 0; }
.footer-bottom { text-align: center; color: #95A2B8; border-top: 1px solid rgba(255,255,255,0.08); margin-top: 28px; padding-top: 18px; font-size: 14px; }
@media (min-width: 680px) {
    .daily-scenes, .route-cards, .privacy-cards, .wifi-cards, .risk-grid, .process-steps, .check-grid, .download-page-grid { grid-template-columns: repeat(2, 1fr); }
    .bento-feature-center { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; }
}
@media (min-width: 980px) {
    .nav-toggle-label { display: none; }
    .site-nav { display: flex; position: static; flex-direction: row; padding: 0; background: transparent; border: 0; box-shadow: none; gap: 4px; }
    .site-nav a { font-size: 14px; }
    .hero-shell { padding: 46px; }
    .hero-content { grid-template-columns: 1.05fr .95fr; }
    .daily-scenes { grid-template-columns: repeat(3, 1fr); }
    .bento-feature-center { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(180px, auto); }
    .bento-card.large { grid-column: span 2; grid-row: span 2; }
    .bento-card.wide { grid-column: span 2; }
    .feature-split { grid-template-columns: 1fr 1fr; }
    .feature-split.reverse .feature-panel:first-child { order: 2; }
    .wifi-cards { grid-template-columns: repeat(3, 1fr); }
    .privacy-cards { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 310px; }
    .download-page-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, 1120px); }
    .hero-shell, .page-hero-inner { border-radius: 26px; padding: 22px; }
    .section { padding: 44px 0; }
    .download-btn { width: 100%; }
    .float-one, .float-two, .float-three, .float-four { position: static; margin: 6px; display: inline-flex; }
    .hero-visual { min-height: auto; }
}