:root {
  --blue: #2980FE;
  --blue-dark: #1768E8;
  --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
  --text: #202636;
  --muted: #667085;
  --light: #F5F7FB;
  --soft-blue: #EEF5FF;
  --border: #E5EAF2;
  --card: #FFFFFF;
  --shadow: 0 18px 46px rgba(35, 60, 120, .12);
  --radius: 28px;
}
* { 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: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.content-container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(229,234,242,.82);
}
.nav-wrap {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .02em;
}
.logo-img { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; }
.nav-toggle {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 9px 16px;
  color: var(--text);
  font-weight: 700;
}
.site-nav {
  position: absolute;
  top: 68px;
  left: 14px;
  right: 14px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 14px;
  color: #4B5565;
  font-size: 15px;
  font-weight: 650;
}
.site-nav a:hover,
.site-nav a.active {
  background: var(--soft-blue);
  color: var(--blue);
}
.gradient-bg { background: var(--gradient); }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 24px;
  background: var(--blue);
  color: #fff;
  border-radius: 999px;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(41,128,254,.28);
  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 34px rgba(23,104,232,.26);
}
.section {
  padding: 58px 0;
}
.section-muted {
  background: var(--light);
}
.section-head {
  margin-bottom: 26px;
}
.section-kicker,
.page-badge,
.card-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--soft-blue);
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}
.section-head h2,
.page-hero h1 {
  margin: 12px 0 10px;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.15;
  letter-spacing: -.03em;
}
.section-head p,
.page-hero p,
.lead {
  color: var(--muted);
  margin: 0;
}
.vpn-saas-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 58px;
  color: #fff;
  background: var(--gradient);
}
.vpn-saas-hero::after {
  content: "";
  position: absolute;
  right: -18vw;
  bottom: -110px;
  width: 70vw;
  height: 260px;
  background: rgba(255,255,255,.15);
  transform: skewY(-9deg);
  border-radius: 64px;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
  align-items: center;
}
.hero-copy h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 8vw, 64px);
  line-height: 1.06;
  letter-spacing: -.05em;
}
.hero-copy p {
  margin: 0 0 22px;
  color: rgba(255,255,255,.88);
  font-size: 17px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.hero-tags span,
.float-label {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.24);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
}
.hero-visual {
  position: relative;
  padding: 18px;
}
.hero-device {
  position: relative;
  z-index: 2;
  padding: 18px;
  border-radius: 36px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.28);
  box-shadow: 0 26px 70px rgba(20, 35, 85, .28);
}
.hero-device img { border-radius: 28px; background: #fff; }
.float-card {
  position: relative;
  z-index: 3;
  margin-top: -28px;
  padding: 18px;
  border-radius: 24px;
  background: rgba(255,255,255,.92);
  color: var(--text);
  box-shadow: var(--shadow);
}
.float-card strong { display:block; font-size: 18px; }
.float-card p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.float-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.float-labels span {
  background: var(--soft-blue);
  color: var(--blue);
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 750;
  font-size: 12px;
}
.product-highlights {
  display: grid;
  gap: 16px;
  margin-top: -34px;
  position: relative;
  z-index: 4;
}
.highlight-card,
.capability-card,
.info-card,
.risk-card,
.faq-item,
.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 10px 30px rgba(31, 55, 115, .06);
}
.highlight-card h3,
.capability-card h3,
.info-card h3,
.risk-card h3,
.step-card h3 {
  margin: 12px 0 8px;
  font-size: 21px;
}
.highlight-card p,
.capability-card p,
.info-card p,
.risk-card p,
.step-card p,
.check-list li,
.clean-list li {
  color: var(--muted);
}
.text-link {
  color: var(--blue);
  font-weight: 800;
}
.split-panel {
  display: grid;
  gap: 24px;
  align-items: center;
  padding: 24px;
  border-radius: 34px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.split-panel.alt { background: linear-gradient(180deg,#fff 0%,#F6F9FF 100%); }
.split-panel img {
  border-radius: 28px;
  background: var(--light);
}
.feature-points,
.protocol-grid,
.policy-grid,
.risk-grid,
.faq-grid,
.process-steps,
.article-cards {
  display: grid;
  gap: 16px;
}
.feature-points {
  grid-template-columns: 1fr;
  margin: 20px 0;
}
.feature-points span,
.protocol-item span,
.policy-item span {
  color: var(--blue);
  font-weight: 850;
}
.vpn-connection-section,
.high-speed-section,
.global-nodes-section,
.privacy-protection-section,
.no-log-policy-section,
.multi-device-section,
.encryption-protocol-section {
  position: relative;
}
.speed-meter {
  padding: 18px;
  border-radius: 26px;
  background: var(--soft-blue);
  border: 1px solid #DCE9FF;
}
.meter-line {
  height: 10px;
  border-radius: 999px;
  background: #D7E8FF;
  overflow: hidden;
  margin: 12px 0;
}
.meter-line i {
  display: block;
  width: 72%;
  height: 100%;
  border-radius: inherit;
  background: var(--blue);
}
.node-stack {
  display: grid;
  gap: 12px;
}
.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--border);
}
.node-item b { color: var(--blue); }
.privacy-panel,
.safety-panel,
.tech-panel {
  padding: 24px;
  border-radius: 34px;
  background: linear-gradient(180deg,#fff 0%,#F7FAFF 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.policy-grid,
.protocol-grid {
  margin-top: 18px;
}
.policy-item,
.protocol-item {
  padding: 20px;
  border-radius: 24px;
  background: #fff;
  border: 1px solid var(--border);
}
.process-steps {
  counter-reset: steps;
}
.step-card {
  position: relative;
  padding-left: 72px;
}
.step-card::before {
  counter-increment: steps;
  content: counter(steps);
  position: absolute;
  left: 22px;
  top: 24px;
  width: 34px;
  height: 34px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: #fff;
  font-weight: 900;
}
.risk-card {
  border-left: 4px solid var(--blue);
}
.risk-card .suggestion {
  display: block;
  margin-top: 10px;
  color: var(--text);
  font-weight: 800;
}
.faq-item h3 {
  margin: 0 0 8px;
  font-size: 19px;
}
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
  margin: 50px auto 0;
  width: min(1120px, calc(100% - 32px));
  padding: 36px 24px;
  border-radius: 36px;
  text-align: center;
  color: #fff;
  background: var(--gradient);
  box-shadow: 0 22px 60px rgba(60, 80, 210, .22);
}
.cta-section h2 { margin: 0 0 10px; font-size: clamp(26px, 5vw, 42px); }
.cta-section p { margin: 0 auto 20px; max-width: 760px; color: rgba(255,255,255,.88); }
.cta-section .download-btn { background: #2980FE; }
.page-hero {
  padding: 52px 0 36px;
  background: linear-gradient(180deg,#F7FAFF 0%,#fff 100%);
}
.page-grid {
  display: grid;
  gap: 24px;
  align-items: start;
}
.article-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 34px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.article-panel h2 {
  margin-top: 0;
}
.article-panel p {
  color: #4C5568;
}
.aside-panel {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 22px;
}
.aside-panel h3 { margin-top: 0; }
.clean-list,
.check-list {
  margin: 0;
  padding-left: 18px;
}
.clean-list li,
.check-list li {
  margin: 8px 0;
}
.download-area {
  margin-top: 22px;
}
.download-page-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 34px;
  box-shadow: var(--shadow);
  padding: 26px;
}
.install-steps {
  display: grid;
  gap: 14px;
  margin: 22px 0;
}
.install-step {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-radius: 22px;
  background: var(--light);
  border: 1px solid var(--border);
}
.install-step b {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
}
.site-footer {
  margin-top: 56px;
  background: #F6F8FC;
  border-top: 1px solid var(--border);
}
.footer-grid {
  padding: 42px 0;
  display: grid;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}
.site-footer p,
.site-footer a {
  color: var(--muted);
}
.site-footer h3 {
  margin: 0 0 10px;
  font-size: 16px;
}
.site-footer a {
  display: block;
  margin: 7px 0;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 16px;
}
.footer-bottom p { margin: 0; font-size: 14px; }
@media (min-width: 680px) {
  .product-highlights,
  .policy-grid,
  .protocol-grid,
  .risk-grid,
  .faq-grid,
  .article-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-points {
    grid-template-columns: repeat(3, 1fr);
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .install-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 960px) {
  .nav-toggle { 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-saas-hero { padding: 74px 0 84px; }
  .hero-grid {
    grid-template-columns: 1.02fr .98fr;
    gap: 50px;
  }
  .product-highlights {
    grid-template-columns: repeat(4, 1fr);
  }
  .split-panel {
    grid-template-columns: 1fr 1fr;
    padding: 38px;
  }
  .split-panel.reverse .split-media { order: -1; }
  .privacy-panel {
    display: grid;
    grid-template-columns: 1fr .82fr;
    gap: 30px;
    align-items: center;
    padding: 38px;
  }
  .policy-grid,
  .protocol-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .risk-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .process-steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
  .footer-grid {
    grid-template-columns: 1.4fr repeat(3, 1fr);
  }
}
@media (max-width: 420px) {
  .content-container,
  .cta-section {
    width: min(100% - 24px, 1120px);
  }
  .section { padding: 44px 0; }
  .highlight-card,
  .capability-card,
  .info-card,
  .risk-card,
  .faq-item,
  .step-card,
  .article-panel,
  .download-page-card {
    border-radius: 22px;
    padding: 18px;
  }
  .step-card { padding-left: 64px; }
  .download-btn { width: 100%; }
}