:root {
  --ink: #08162f;
  --muted: #60708e;
  --line: #dce5f3;
  --paper: #ffffff;
  --soft: #f3f7fd;
  --blue: #2468f2;
  --blue-dark: #1247bd;
  --cyan: #41d5ff;
  --green: #13a877;
  --navy: #071a3b;
  --radius: 24px;
  --shadow: 0 28px 80px rgba(21, 55, 112, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 16px; color: #fff; background: var(--navy); border-radius: 10px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(220,229,243,.78);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(18px);
}
.nav { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark {
  width: 39px; height: 39px; display: grid; place-items: center; flex: 0 0 auto;
  color: #fff; background: linear-gradient(145deg, #1984ff, #2a55df); border-radius: 12px;
  box-shadow: 0 8px 22px rgba(36,104,242,.3);
}
.brand-mark svg, .brand-mark img { width: 24px; height: 24px; }
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy small { margin-top: 4px; color: #8290aa; font-size: 11px; font-weight: 500; letter-spacing: .06em; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 26px; color: #334260; font-size: 15px; font-weight: 600; }
.nav-links a { padding: 23px 0 20px; border-bottom: 3px solid transparent; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue); border-bottom-color: var(--blue); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 12px; color: var(--ink); font-size: 22px; }
.button {
  min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 0 21px; border: 1px solid var(--line); border-radius: 13px; color: #20304e;
  background: #fff; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(19,55,119,.12); }
.button.primary { color: #fff; border-color: var(--blue); background: var(--blue); box-shadow: 0 10px 28px rgba(36,104,242,.24); }
.button.primary:hover { background: var(--blue-dark); }
.button.light { color: #fff; border-color: rgba(255,255,255,.25); background: rgba(255,255,255,.1); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
  background:
    radial-gradient(circle at 82% 18%, rgba(65,213,255,.2), transparent 24%),
    radial-gradient(circle at 68% 62%, rgba(52,103,255,.25), transparent 32%),
    linear-gradient(135deg, #071a3b 0%, #0a2e6d 58%, #174fb3 100%);
  color: #fff;
}
.hero::before { content: ""; position: absolute; inset: 0; opacity: .22; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to right, #000, transparent 70%); }
.hero-grid { position: relative; display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 54px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: #83dcff; font-size: 14px; font-weight: 800; letter-spacing: .12em; }
.eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.hero h1 { max-width: 650px; margin: 0; font-size: clamp(42px, 5.3vw, 72px); line-height: 1.08; letter-spacing: -.055em; }
.hero h1 em { font-style: normal; color: #74e0ff; }
.hero-lead { max-width: 610px; margin: 24px 0 0; color: #cad8f2; font-size: 19px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 33px; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 35px; color: #aebfdf; font-size: 14px; }
.hero-facts span { display: inline-flex; align-items: center; gap: 8px; }
.hero-facts i { width: 7px; height: 7px; display: inline-block; background: #4ee0ad; border-radius: 50%; box-shadow: 0 0 0 5px rgba(78,224,173,.12); }
.product-stage { position: relative; padding: 28px 0 20px; }
.product-stage::before { content: ""; position: absolute; inset: 7% 5% -5%; border-radius: 40px; background: linear-gradient(145deg, rgba(57,117,255,.65), rgba(36,213,255,.2)); filter: blur(24px); }
.product-window { position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.32); border-radius: 19px; background: #f5f8fd; box-shadow: 0 36px 100px rgba(0,9,35,.48); transform: perspective(1400px) rotateY(-4deg) rotateX(2deg); }
.window-bar { height: 34px; display: flex; align-items: center; gap: 7px; padding: 0 13px; background: #fff; border-bottom: 1px solid #e5ebf5; }
.window-bar i { width: 8px; height: 8px; border-radius: 50%; background: #dbe3ef; }
.product-window img { width: 100%; aspect-ratio: 1.49; object-fit: cover; object-position: top left; }
.float-card { position: absolute; right: -12px; bottom: -5px; display: grid; grid-template-columns: auto 1fr; gap: 11px; min-width: 225px; padding: 15px 17px; border: 1px solid rgba(255,255,255,.7); border-radius: 16px; color: var(--ink); background: rgba(255,255,255,.94); box-shadow: 0 18px 50px rgba(0,14,44,.24); }
.float-card .pulse { width: 13px; height: 13px; margin-top: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 7px rgba(19,168,119,.12); }
.float-card strong { display: block; font-size: 15px; }
.float-card small { color: var(--muted); font-size: 12px; }

.proof-strip { border-bottom: 1px solid var(--line); background: #fff; }
.proof-grid { min-height: 98px; display: grid; grid-template-columns: 1.35fr repeat(3, 1fr); align-items: center; }
.proof-grid > div { padding: 18px 28px; border-left: 1px solid var(--line); }
.proof-grid > div:first-child { padding-left: 0; border-left: 0; }
.proof-grid strong { display: block; font-size: 16px; }
.proof-grid span { color: var(--muted); font-size: 13px; }

.section { padding: 92px 0; }
.section.soft { background: var(--soft); }
.section.dark { color: #fff; background: var(--navy); }
.section-head { max-width: 1120px; margin: 0 auto 38px; text-align: center; }
.section-head.center { margin-right: auto; margin-left: auto; text-align: center; }
.kicker { margin: 0 0 9px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .12em; }
.section h2, .page-hero h1 { margin: 0; font-size: clamp(32px, 3.2vw, 48px); line-height: 1.2; letter-spacing: -.045em; }
.section-head > p:last-child { max-width: 780px; margin: 15px auto 0; color: var(--muted); font-size: 18px; }
.dark .section-head > p:last-child { color: #aebfdf; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { position: relative; min-height: 245px; padding: 27px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.feature-card .icon { width: 50px; height: 50px; display: grid; place-items: center; margin-bottom: 25px; color: var(--blue); background: #eaf1ff; border-radius: 15px; font-size: 22px; font-weight: 800; }
.feature-card h3 { margin: 0 0 10px; font-size: 21px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 15px; }
.feature-card b { position: absolute; right: 18px; top: 10px; color: #edf2fa; font-size: 54px; line-height: 1; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: step; }
.step { position: relative; padding: 34px 35px; border: 1px solid #2c426b; background: rgba(255,255,255,.035); }
.step:first-child { border-radius: 22px 0 0 22px; }
.step:last-child { border-radius: 0 22px 22px 0; }
.step + .step { border-left: 0; }
.step span { width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 32px; border: 1px solid #45638f; border-radius: 50%; color: #7fdbff; font-weight: 800; }
.step h3 { margin: 0 0 9px; font-size: 21px; }
.step p { margin: 0; color: #aebfdf; font-size: 15px; }

.scenario-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 18px; }
.scenario-main, .scenario-side { border-radius: 28px; overflow: hidden; }
.scenario-main { min-height: 440px; padding: 40px; color: #fff; background: linear-gradient(145deg, #0b285f, #2168ef); }
.scenario-main h3 { max-width: 540px; margin: 110px 0 16px; font-size: 36px; line-height: 1.25; }
.scenario-main p { max-width: 620px; color: #d7e4ff; }
.scenario-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.scenario-tags span { padding: 7px 12px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; background: rgba(255,255,255,.08); font-size: 13px; }
.scenario-side { display: grid; gap: 18px; }
.scenario-card { padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.scenario-card small { color: var(--blue); font-weight: 800; }
.scenario-card h3 { margin: 7px 0 8px; font-size: 22px; }
.scenario-card p { margin: 0; color: var(--muted); font-size: 14px; }

.cta-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; padding: 45px 50px; border-radius: 30px; color: #fff; background: linear-gradient(120deg, #0a2350, #1556c9 72%, #1f7bf4); box-shadow: var(--shadow); }
.cta-panel h2 { font-size: clamp(28px, 4vw, 43px); }
.cta-panel p { margin: 12px 0 0; color: #c8d8f5; }
.cta-actions { display: flex; gap: 10px; }

.page-hero { position: relative; overflow: hidden; padding: 82px 0 68px; background: linear-gradient(180deg, #f4f8ff, #fff); border-bottom: 1px solid var(--line); text-align: center; }
.page-hero::after { content: ""; position: absolute; width: 460px; height: 460px; right: -140px; top: -260px; border-radius: 50%; background: rgba(36,104,242,.08); }
.page-hero .kicker { position: relative; }
.page-hero h1 { position: relative; max-width: 1120px; margin: 0 auto; }
.page-hero p { position: relative; max-width: 720px; margin: 18px auto 0; color: var(--muted); font-size: 18px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split h2 { font-size: clamp(30px, 4vw, 46px); }
.split p { color: var(--muted); }
.check-list { list-style: none; margin: 25px 0 0; padding: 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; color: #31405e; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--green); font-size: 12px; font-weight: 900; }
.visual-panel { min-height: 430px; padding: 28px; border: 1px solid #cfdcf0; border-radius: 28px; background: linear-gradient(145deg, #edf4ff, #fff); box-shadow: var(--shadow); }
.flow-row { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 105px; }
.flow-node { width: 126px; min-height: 125px; display: grid; place-items: center; padding: 18px; text-align: center; border: 1px solid #cddbf0; border-radius: 20px; background: #fff; box-shadow: 0 12px 35px rgba(21,55,112,.1); }
.flow-node b { display: block; font-size: 29px; color: var(--blue); }
.flow-node small { color: var(--muted); font-size: 12px; }
.flow-line { flex: 1; height: 2px; position: relative; background: repeating-linear-gradient(90deg, var(--blue) 0 6px, transparent 6px 12px); }
.flow-line::after { content: ""; position: absolute; right: -1px; top: -4px; width: 9px; height: 9px; border-top: 2px solid var(--blue); border-right: 2px solid var(--blue); transform: rotate(45deg); }
.flow-caption { margin-top: 35px; text-align: center; color: var(--muted); font-size: 14px; }

.price-toggle { display: flex; justify-content: center; align-items: center; gap: 8px; margin-bottom: 34px; }
.price-toggle button { padding: 10px 17px; border: 0; border-radius: 11px; color: var(--muted); background: transparent; font: inherit; font-weight: 700; cursor: pointer; }
.price-toggle button.active { color: var(--blue); background: #e8f0ff; }
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.price-card { position: relative; display: flex; flex-direction: column; min-height: 510px; padding: 28px 24px; border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.price-card.featured { border: 2px solid var(--blue); box-shadow: 0 25px 70px rgba(36,104,242,.17); transform: translateY(-8px); }
.popular { position: absolute; right: 17px; top: 16px; padding: 4px 9px; color: #fff; background: var(--blue); border-radius: 999px; font-size: 11px; font-weight: 800; }
.price-card h3 { margin: 0; font-size: 23px; }
.price-card > p { min-height: 51px; margin: 7px 0 18px; color: var(--muted); font-size: 14px; }
.price { min-height: 60px; display: flex; align-items: baseline; gap: 4px; margin-bottom: 18px; }
.price strong { font-size: 40px; line-height: 1; letter-spacing: -.04em; }
.price span { color: var(--muted); }
.price-card ul { flex: 1; margin: 12px 0 25px; padding: 20px 0 0; list-style: none; border-top: 1px solid var(--line); }
.price-card li { margin: 9px 0; color: #42516e; font-size: 14px; }
.price-card li::before { content: "✓"; margin-right: 8px; color: var(--green); font-weight: 900; }
.price-card .button { width: 100%; }
.price-note { margin-top: 24px; color: var(--muted); text-align: center; font-size: 13px; }

.security-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.security-card { display: grid; grid-template-columns: auto 1fr; gap: 18px; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.security-card .icon { width: 45px; height: 45px; display: grid; place-items: center; color: var(--blue); background: #eaf1ff; border-radius: 14px; font-weight: 900; }
.security-card h3 { margin: 0 0 7px; font-size: 20px; }
.security-card p { margin: 0; color: var(--muted); font-size: 14px; }
.boundary { padding: 28px 32px; border-left: 4px solid var(--blue); border-radius: 0 18px 18px 0; background: #eef4ff; }
.boundary strong { display: block; margin-bottom: 7px; font-size: 18px; }
.boundary p { margin: 0; color: #4f5f7d; }

.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq { border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.faq summary { padding: 20px 54px 20px 22px; cursor: pointer; list-style: none; font-weight: 700; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 22px; top: 15px; color: var(--blue); font-size: 25px; font-weight: 400; }
.faq[open] summary::after { content: "−"; }
.faq p { margin: 0; padding: 0 22px 21px; color: var(--muted); font-size: 15px; }

.site-footer { padding: 52px 0 25px; color: #b7c5df; background: #06152f; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 34px; padding-bottom: 38px; }
.footer-brand p { max-width: 360px; margin: 18px 0 0; font-size: 14px; }
.footer-title { margin: 0 0 14px; color: #fff; font-size: 14px; }
.footer-links { display: grid; gap: 9px; font-size: 13px; }
.footer-links a:hover { color: #fff; }
.contact-block { display: flex; align-items: center; gap: 14px; }
.contact-block img { width: 82px; height: 82px; flex: 0 0 auto; padding: 4px; border-radius: 10px; background: #fff; }
.contact-copy { display: grid; gap: 5px; font-size: 12px; line-height: 1.55; }
.contact-copy strong { color: #fff; font-size: 13px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 28px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); text-align: center; font-size: 12px; }
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: #fff; }

@media (min-width: 981px) {
  .section-head h2, .page-hero h1 { white-space: nowrap; }
}

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .button { transition: none; }
}

@media (max-width: 980px) {
  .nav-links, .nav-actions { display: none; }
  .nav-toggle { display: block; }
  .nav.open { flex-wrap: wrap; padding-bottom: 16px; }
  .nav.open .nav-links { order: 3; width: 100%; display: grid; gap: 0; margin-left: 0; }
  .nav.open .nav-links a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .nav.open .nav-actions { order: 4; width: 100%; display: flex; }
  .hero { padding-top: 62px; }
  .hero-grid, .split, .scenario-grid { grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .hero-lead { margin-right: auto; margin-left: auto; }
  .hero-actions, .hero-facts { justify-content: center; }
  .product-stage { max-width: 760px; margin: 0 auto; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .proof-grid > div:nth-child(3) { border-left: 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .price-card.featured { transform: none; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav { min-height: 64px; }
  .brand-copy small { display: none; }
  .hero { padding: 52px 0 48px; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 17px; }
  .hero-actions .button { width: 100%; }
  .product-window { transform: none; border-radius: 14px; }
  .float-card { position: relative; right: auto; bottom: auto; margin: 14px 0 0 auto; }
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .proof-grid > div { padding: 16px 12px; }
  .section { padding: 64px 0; }
  .feature-grid, .pricing-grid, .security-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step:first-child { border-radius: 20px 20px 0 0; }
  .step:last-child { border-radius: 0 0 20px 20px; }
  .step + .step { border-left: 1px solid #2c426b; border-top: 0; }
  .scenario-main { min-height: auto; padding: 28px; }
  .scenario-main h3 { margin-top: 75px; font-size: 29px; }
  .cta-panel { grid-template-columns: 1fr; padding: 32px 25px; }
  .cta-actions { flex-direction: column; }
  .page-hero { padding: 60px 0 52px; }
  .flow-row { margin-top: 65px; gap: 7px; }
  .flow-node { width: 93px; min-height: 105px; padding: 10px; }
  .flow-node b { font-size: 22px; }
  .visual-panel { min-height: 350px; padding: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-grid > div:first-child, .footer-grid > div:last-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }
}