:root {
  --ink: #07111f;
  --ink-soft: #12253c;
  --navy: #16324f;
  --brass: #c6a46a;
  --brass-deep: #9a7740;
  --mist: #e8eef4;
  --paper: #f5f7fa;
  --line: rgba(22, 50, 79, 0.12);
  --text: #1a2736;
  --muted: #5d6b7c;
  --white: #ffffff;
  --radius: 2px;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Sora", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow-soft: 0 18px 50px rgba(7, 17, 31, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  transition: background .35s ease, box-shadow .35s ease, backdrop-filter .35s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 17, 31, 0.86);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--white);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(198, 164, 106, 0.7);
  display: grid;
  place-items: center;
  color: var(--brass);
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .04em;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: .04em;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.78);
  font-size: .92rem;
  letter-spacing: .02em;
  transition: color .25s ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--brass);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 1.25rem;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: .92rem;
  letter-spacing: .03em;
  cursor: pointer;
  transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--brass);
  color: var(--ink);
  border-color: var(--brass);
}

.btn-primary:hover {
  background: #d4b57d;
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.btn-ink {
  background: var(--ink);
  color: var(--white);
}

.btn-ink:hover {
  background: var(--navy);
}

.btn-outline-ink {
  background: transparent;
  color: var(--ink);
  border-color: rgba(7, 17, 31, 0.25);
}

.btn-outline-ink:hover {
  border-color: var(--brass-deep);
  color: var(--brass-deep);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(198, 164, 106, 0.22), transparent 55%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(70, 120, 170, 0.18), transparent 50%),
    linear-gradient(155deg, #050d18 0%, #0e2138 42%, #16324f 78%, #0a1628 100%);
}

.hero-visual {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 60% 40%, #000 20%, transparent 75%);
  animation: gridDrift 28s linear infinite;
}

.hero-orb {
  position: absolute;
  width: min(52vw, 620px);
  height: min(52vw, 620px);
  right: -8%;
  top: 8%;
  border-radius: 50%;
  background:
    conic-gradient(from 210deg, rgba(198, 164, 106, 0.0), rgba(198, 164, 106, 0.35), rgba(255, 255, 255, 0.05), rgba(198, 164, 106, 0.0));
  filter: blur(2px);
  opacity: .85;
  animation: orbPulse 8s ease-in-out infinite;
}

.hero-ring {
  position: absolute;
  right: 8%;
  top: 22%;
  width: min(38vw, 420px);
  height: min(38vw, 420px);
  border: 1px solid rgba(198, 164, 106, 0.28);
  border-radius: 50%;
  animation: ringSpin 36s linear infinite;
}

.hero-ring::after {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 8.5rem 0 5.5rem;
  max-width: 640px;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: .02em;
  margin: 0 0 1.25rem;
  opacity: 0;
  transform: translateY(22px);
  animation: riseIn .9s ease forwards .15s;
}

.hero-title {
  margin: 0 0 .9rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  opacity: 0;
  transform: translateY(22px);
  animation: riseIn .9s ease forwards .35s;
}

.hero-lead {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
  opacity: 0;
  transform: translateY(22px);
  animation: riseIn .9s ease forwards .5s;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  opacity: 0;
  transform: translateY(22px);
  animation: riseIn .9s ease forwards .65s;
}

.hero-slogan {
  margin-top: 2.25rem;
  color: var(--brass);
  font-family: var(--font-display);
  letter-spacing: .18em;
  font-size: .85rem;
  opacity: 0;
  animation: riseIn .9s ease forwards .8s;
}

.section {
  padding: 5.5rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.75rem;
}

.eyebrow {
  display: inline-block;
  margin-bottom: .75rem;
  color: var(--brass-deep);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.45rem);
  line-height: 1.25;
  font-weight: 600;
  color: var(--ink);
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.section-dark {
  background: var(--ink);
  color: var(--white);
}

.section-dark .section-head h2 {
  color: var(--white);
}

.section-dark .section-head p,
.section-dark .eyebrow {
  color: rgba(198, 164, 106, 0.9);
}

.section-mist {
  background: linear-gradient(180deg, #eef3f8 0%, #f7f9fb 100%);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.module-item {
  padding: 1.35rem 1.2rem 1.45rem;
  border-top: 2px solid var(--brass);
  background: transparent;
  transition: background .3s ease, transform .3s ease;
}

.module-item:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-3px);
}

.module-item h3 {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
}

.module-item .sub {
  margin: 0 0 .85rem;
  color: var(--brass);
  font-size: .88rem;
}

.module-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: .92rem;
}

.feature-stack {
  display: grid;
  gap: 3.5rem;
}

.feature-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.feature-row:nth-child(even) {
  grid-template-columns: 1fr 1.1fr;
}

.feature-row:nth-child(even) .feature-copy {
  order: 2;
}

.feature-row:nth-child(even) .feature-panel {
  order: 1;
}

.feature-copy h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.7rem;
  color: var(--ink);
}

.feature-copy .sub {
  margin: 0 0 1rem;
  color: var(--brass-deep);
}

.feature-copy p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.point-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .65rem 1rem;
}

.point-list li {
  position: relative;
  padding-left: 1rem;
  color: var(--text);
  font-size: .94rem;
}

.point-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 6px;
  background: var(--brass);
}

.feature-panel {
  min-height: 260px;
  padding: 2rem;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(7, 17, 31, 0.92), rgba(22, 50, 79, 0.88)),
    radial-gradient(circle at 80% 20%, rgba(198, 164, 106, 0.35), transparent 45%);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.feature-panel strong {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
}

.feature-panel span {
  margin-top: .5rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: .92rem;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}

.price-item {
  position: relative;
  padding: 1.75rem 1.5rem 1.6rem;
  border-top: 3px solid rgba(7, 17, 31, 0.15);
  background: var(--white);
}

.price-item.is-hot {
  border-top-color: var(--brass);
  box-shadow: var(--shadow-soft);
  transform: translateY(-6px);
}

.price-item .badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  color: var(--brass-deep);
  font-size: .75rem;
  letter-spacing: .08em;
}

.price-item h3 {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
}

.price-item .desc {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: .9rem;
}

.price-item .amount {
  display: flex;
  align-items: baseline;
  gap: .35rem;
  margin-bottom: 1.25rem;
}

.price-item .amount em {
  font-style: normal;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--ink);
  line-height: 1;
}

.price-item .amount span {
  color: var(--muted);
  font-size: .9rem;
}

.price-meta {
  list-style: none;
  margin: 0 0 1.35rem;
  padding: 0;
  display: grid;
  gap: .45rem;
  color: var(--text);
  font-size: .92rem;
}

.price-meta li span {
  color: var(--muted);
}

.price-features {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  display: grid;
  gap: .4rem;
  font-size: .88rem;
  color: var(--muted);
  max-height: 9.5rem;
  overflow: hidden;
}

.saas-notes {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  color: var(--muted);
  font-size: .9rem;
}

.private-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 1.25rem;
}

.private-main,
.private-side {
  padding: 2rem 1.75rem;
  background: rgba(255, 255, 255, 0.04);
  border-top: 2px solid var(--brass);
}

.private-main .price {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3rem);
  color: var(--brass);
  margin: .5rem 0 1rem;
}

.private-main h3,
.private-side h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.private-main p,
.private-side p {
  color: rgba(255, 255, 255, 0.7);
}

.service-grid,
.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.service-item,
.security-item {
  padding-top: 1rem;
  border-top: 1px solid rgba(7, 17, 31, 0.15);
}

.service-item h3,
.security-item h3 {
  margin: 0 0 .55rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.service-item p,
.security-item p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
}

.cta-band {
  padding: 5rem 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(198, 164, 106, 0.18), transparent 45%),
    linear-gradient(120deg, #07111f, #16324f 60%, #0a1a2c);
  color: var(--white);
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 .85rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 2.7rem);
}

.cta-band p {
  margin: 0 auto 1.75rem;
  max-width: 28rem;
  color: rgba(255, 255, 255, 0.72);
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
  text-align: left;
}

.contact-panel dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.contact-panel dt {
  color: var(--brass);
  font-size: .8rem;
  letter-spacing: .12em;
}

.contact-panel dd {
  margin: .25rem 0 0;
  font-size: 1.15rem;
}

.site-footer {
  padding: 2rem 0 2.5rem;
  background: #050d18;
  color: rgba(255, 255, 255, 0.55);
  font-size: .88rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.footer-row a:hover {
  color: var(--brass);
}

.page-hero {
  padding: 8.5rem 0 3.5rem;
  background:
    linear-gradient(155deg, #050d18 0%, #12253c 55%, #16324f 100%);
  color: var(--white);
}

.page-hero h1 {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.page-hero p {
  margin: 0;
  max-width: 36rem;
  color: rgba(255, 255, 255, 0.72);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes riseIn {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes orbPulse {
  0%, 100% { transform: scale(1); opacity: .8; }
  50% { transform: scale(1.06); opacity: 1; }
}

@keyframes ringSpin {
  to { transform: rotate(360deg); }
}

@keyframes gridDrift {
  to { background-position: 64px 64px; }
}

@media (max-width: 980px) {
  .module-grid,
  .price-grid,
  .service-grid,
  .security-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-row,
  .feature-row:nth-child(even),
  .private-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .feature-row:nth-child(even) .feature-copy,
  .feature-row:nth-child(even) .feature-panel {
    order: initial;
  }

  .price-item.is-hot {
    transform: none;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem 1.25rem 1rem;
    background: rgba(7, 17, 31, 0.96);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links li {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-links a {
    display: block;
    padding: .85rem 0;
  }

  .nav-cta {
    display: none;
  }

  .module-grid,
  .price-grid,
  .service-grid,
  .security-grid,
  .point-list {
    grid-template-columns: 1fr;
  }

  .hero-content {
    padding-bottom: 4rem;
  }
}