:root {
  --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --blue: #2980FE;
  --blue-dark: #1768E8;
  --text: #1f2937;
  --muted: #6b7280;
  --soft: #f5f7fb;
  --soft-blue: #eef5ff;
  --line: #e5eaf2;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(26, 43, 90, .10);
  --radius-xl: 34px;
  --radius-lg: 26px;
  --radius-md: 18px;
}
* { 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: #ffffff;
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; 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,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229,234,242,.85);
}
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: #172033; }
.brand img { width: 40px; height: 40px; border-radius: 12px; object-fit: cover; box-shadow: 0 10px 22px rgba(41,128,254,.16); }
.nav-toggle { border: 1px solid var(--line); background: var(--white); border-radius: 14px; padding: 8px 12px; font-size: 22px; color: #172033; }
.site-nav { display: none; position: absolute; top: 70px; left: 16px; right: 16px; padding: 14px; background: var(--white); 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: 12px; color: #4b5563; font-size: 14px; }
.site-nav a.active, .site-nav a:hover { color: var(--blue); background: #edf5ff; }
.section { padding: 68px 0; }
.section-soft { background: var(--soft); }
.section-head { margin-bottom: 26px; }
.section-kicker, .page-badge, .mini-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue);
  background: #edf5ff;
  border: 1px solid #dcecff;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 700;
}
h1, h2, h3 { margin: 0 0 12px; line-height: 1.22; color: #152033; }
h1 { font-size: clamp(34px, 7vw, 64px); letter-spacing: -1.8px; }
h2 { font-size: clamp(28px, 4.8vw, 44px); letter-spacing: -1px; }
h3 { font-size: 21px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 18px; color: #eaf0ff; max-width: 680px; }
.section-head p { max-width: 760px; font-size: 17px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: 999px;
  background: #2980FE;
  color: #fff;
  font-weight: 800;
  border: none;
  box-shadow: 0 14px 28px rgba(41,128,254,.28);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.download-btn:hover { background: #1768E8; transform: translateY(-2px); box-shadow: 0 18px 34px rgba(23,104,232,.30); }
.link-more { color: var(--blue); font-weight: 800; display: inline-flex; margin-top: 4px; }
.network-manager-hero { padding: 30px 0 54px; }
.hero-shell {
  position: relative;
  overflow: hidden;
  background: var(--brand-gradient);
  border-radius: 0 0 34px 34px;
  color: #fff;
  padding: 42px 24px;
  min-height: 650px;
}
.hero-shell:before, .hero-shell:after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(4px);
  opacity: .32;
  background: #fff;
}
.hero-shell:before { width: 280px; height: 280px; right: -80px; top: -80px; }
.hero-shell:after { width: 220px; height: 220px; left: -90px; bottom: 20px; }
.hero-grid { position: relative; z-index: 1; display: grid; gap: 34px; align-items: center; }
.hero-copy h1, .hero-copy p { color: #fff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 24px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-tags span { background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.28); color: #fff; border-radius: 999px; padding: 8px 12px; font-size: 13px; }
.hero-visual { position: relative; max-width: 520px; margin: 0 auto; }
.hero-visual .app-img { width: min(420px, 88vw); margin: 0 auto; border-radius: 30px; filter: drop-shadow(0 30px 35px rgba(13,22,58,.24)); }
.float-card { position: absolute; background: rgba(255,255,255,.92); color: #172033; border: 1px solid rgba(255,255,255,.6); border-radius: 18px; padding: 10px 14px; box-shadow: 0 16px 35px rgba(16,27,70,.16); font-size: 13px; font-weight: 800; }
.float-card.one { top: 8%; left: 0; }
.float-card.two { top: 28%; right: 0; }
.float-card.three { bottom: 22%; left: 2%; }
.float-card.four { bottom: 7%; right: 8%; }
.status-panel { margin-top: 18px; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.22); border-radius: 22px; padding: 14px; display: grid; gap: 10px; }
.status-line { display: flex; align-items: center; justify-content: space-between; color: #fff; font-size: 13px; }
.status-line strong { font-size: 16px; }
.daily-scenes { display: grid; gap: 16px; }
.scene-card, .bento-card, .info-card, .risk-card, .faq-item, .step-card, .page-card, .tip-panel, .content-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 28px rgba(26,43,90,.06);
}
.scene-card { padding: 24px; }
.scene-card .mini-tag { margin-bottom: 14px; }
.bento-feature-center { display: grid; gap: 16px; }
.bento-card { padding: 24px; min-height: 210px; display: flex; flex-direction: column; justify-content: space-between; }
.bento-card.large { min-height: 270px; }
.bento-card .number { width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center; background: var(--soft-blue); color: var(--blue); font-weight: 900; margin-bottom: 18px; }
.feature-split, .image-split { display: grid; gap: 24px; align-items: center; }
.feature-panel {
  border-radius: var(--radius-xl);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 26px;
  box-shadow: var(--shadow);
}
.feature-panel ul, .check-list, .clean-list { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.feature-panel li, .check-list li, .clean-list li { position: relative; padding-left: 26px; color: #4b5563; }
.feature-panel li:before, .check-list li:before, .clean-list li:before { content: ""; position: absolute; left: 0; top: 10px; width: 9px; height: 9px; border-radius: 99px; background: var(--blue); }
.image-frame { border-radius: var(--radius-xl); background: linear-gradient(145deg, #f7fbff, #edf2ff); border: 1px solid var(--line); padding: 22px; box-shadow: var(--shadow); }
.image-frame img { border-radius: 24px; margin: 0 auto; }
.smart-route-section { background: linear-gradient(180deg, #f8fbff 0%, #eef4ff 100%); }
.route-panel { display: grid; gap: 16px; }
.route-row { display: grid; gap: 8px; padding: 18px; border-radius: 20px; background: rgba(255,255,255,.78); border: 1px solid var(--line); }
.progress { height: 8px; border-radius: 999px; background: #d8e8ff; overflow: hidden; }
.progress span { display: block; height: 100%; border-radius: inherit; background: var(--blue); }
.public-wifi-section .wifi-grid, .privacy-grid, .account-grid { display: grid; gap: 16px; }
.safety-panel { display: grid; gap: 22px; align-items: center; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-xl); padding: 26px; box-shadow: var(--shadow); }
.info-card { padding: 22px; }
.multi-device-section { background: #fbfcff; }
.device-stack { display: grid; gap: 14px; }
.device-card { padding: 18px; border-radius: 22px; background: #fff; border: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.device-card strong { color: #172033; }
.network-diagnosis-section .diagnosis-grid { display: grid; gap: 16px; }
.process-steps { display: grid; gap: 16px; counter-reset: step; }
.step-card { padding: 22px; position: relative; overflow: hidden; }
.step-card .step-num { width: 42px; height: 42px; border-radius: 15px; background: var(--brand-gradient); color: #fff; display: grid; place-items: center; font-weight: 900; margin-bottom: 16px; }
.risk-grid { display: grid; gap: 16px; }
.risk-card { padding: 20px; border-left: 5px solid var(--blue); }
.risk-card strong { display: block; color: #172033; margin-bottom: 6px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.cta-section { padding: 70px 0; }
.cta-box { text-align: center; color: #fff; background: var(--brand-gradient); border-radius: var(--radius-xl); padding: 42px 24px; position: relative; overflow: hidden; }
.cta-box h2, .cta-box p { color: #fff; }
.cta-box p { max-width: 680px; margin: 0 auto 22px; opacity: .92; }
.page-hero { padding: 56px 0 26px; background: linear-gradient(180deg, #f7fbff 0%, #fff 100%); }
.page-hero-inner { max-width: 860px; }
.page-hero h1 { color: #172033; margin-top: 16px; }
.page-hero p { font-size: 18px; }
.page-layout { display: grid; gap: 24px; padding: 34px 0 72px; }
.page-main { display: grid; gap: 20px; }
.page-card { padding: 24px; }
.page-card h2 { font-size: 28px; }
.aside { display: grid; gap: 16px; align-content: start; }
.tip-panel { padding: 22px; background: #fbfdff; }
.download-panel { text-align: center; padding: 26px; border-radius: var(--radius-lg); background: var(--brand-gradient); color: #fff; }
.download-panel h2, .download-panel p { color: #fff; }
.steps-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.steps-list li { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.steps-list span { display: inline-flex; width: 30px; height: 30px; border-radius: 10px; background: var(--soft-blue); color: var(--blue); align-items: center; justify-content: center; font-weight: 900; margin-right: 8px; }
.table-like { display: grid; gap: 12px; }
.table-like div { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.site-footer { background: #101827; color: #d7deeb; padding: 52px 0 24px; }
.footer-grid { display: grid; gap: 26px; }
.footer-brand { color: #fff; font-weight: 900; font-size: 22px; margin-bottom: 12px; }
.site-footer p { color: #aeb8c9; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; color: #b8c3d6; margin: 8px 0; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 34px; padding-top: 18px; display: flex; flex-direction: column; gap: 8px; color: #9da8ba; font-size: 13px; }
@media (min-width: 720px) {
  .daily-scenes { grid-template-columns: repeat(2, 1fr); }
  .bento-feature-center { grid-template-columns: repeat(2, 1fr); }
  .privacy-grid, .account-grid, .network-diagnosis-section .diagnosis-grid, .risk-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
  .container { width: min(1160px, calc(100% - 56px)); }
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; align-items: center; gap: 4px; padding: 0; border: none; border-radius: 0; box-shadow: none; background: transparent; }
  .site-nav a { font-size: 14px; }
  .hero-shell { border-radius: 0 0 46px 46px; padding: 68px 54px; min-height: 640px; }
  .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 54px; }
  .status-panel { grid-template-columns: repeat(3, 1fr); }
  .daily-scenes { grid-template-columns: repeat(3, 1fr); }
  .bento-feature-center { grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(190px, auto); }
  .bento-card { grid-column: span 2; }
  .bento-card.large { grid-column: span 3; grid-row: span 2; }
  .feature-split, .image-split, .safety-panel, .page-layout { grid-template-columns: 1fr 1fr; }
  .page-layout { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
  .public-wifi-section .wifi-grid { grid-template-columns: repeat(3, 1fr); }
  .privacy-grid, .account-grid { grid-template-columns: repeat(3, 1fr); }
  .network-diagnosis-section .diagnosis-grid { grid-template-columns: repeat(4, 1fr); }
  .risk-grid { grid-template-columns: repeat(4, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}
@media (max-width: 430px) {
  .container { width: min(100% - 24px, 1120px); }
  .hero-shell { padding: 34px 16px; }
  .float-card { position: static; display: inline-flex; margin: 6px; }
  .hero-visual { text-align: center; }
  .section { padding: 52px 0; }
  .download-btn { width: 100%; }
}