:root {
  --bg: #020611;
  --bg-soft: #07111f;
  --panel: rgba(13, 23, 39, 0.84);
  --panel-strong: rgba(15, 27, 48, 0.95);
  --line: rgba(148, 163, 184, 0.16);
  --line-hot: rgba(124, 92, 255, 0.55);
  --text: #f7fbff;
  --muted: #a9b5c7;
  --soft: #738199;
  --accent: #7c5cff;
  --accent-2: #38bdf8;
  --radius: 16px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 78% 8%, rgba(99, 102, 241, 0.24), transparent 28rem),
    radial-gradient(circle at 14% 18%, rgba(14, 165, 233, 0.12), transparent 24rem),
    linear-gradient(180deg, #020611 0%, #06111f 44%, #020611 100%);
  color: var(--text);
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(rgba(124, 92, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 72%);
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  max-width: 100%;
}

main {
  padding-top: 58px;
}

section[id] {
  scroll-margin-top: 76px;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 80;
  display: grid;
  grid-template-columns: 240px 1fr auto;
  align-items: center;
  gap: 22px;
  height: 58px;
  padding: 0 clamp(18px, 5vw, 80px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(2, 6, 17, 0.78);
  backdrop-filter: blur(18px);
}

.site-header.is-elevated {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.26);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  width: 27px;
  height: 27px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  box-shadow: 0 0 22px rgba(124, 92, 255, 0.55);
  transform: rotate(45deg);
}

.brand-mark::before {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  content: "";
}

.brand-mark::after {
  position: absolute;
  top: 9px;
  right: -8px;
  width: 8px;
  height: 3px;
  border-radius: 99px;
  background: var(--accent-2);
  content: "";
}

.brand strong {
  overflow: hidden;
  font-size: 18px;
  font-weight: 950;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: clamp(22px, 3.8vw, 54px);
}

.nav-links a {
  position: relative;
  padding: 20px 0 18px;
  color: #dde5f4;
  font-size: 14px;
  font-weight: 850;
}

.nav-links a::after {
  position: absolute;
  right: 28%;
  bottom: 5px;
  left: 28%;
  height: 2px;
  border-radius: 99px;
  content: "";
  background: var(--accent);
  opacity: 0;
  transform: scaleX(0.4);
  transition: 0.22s ease;
}

.nav-links a.active,
.nav-links a:hover {
  color: #fff;
}

.nav-links a.active::after,
.nav-links a:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 900;
  transition: 0.22s ease;
}

.header-cta {
  min-height: 36px;
  padding: 0 22px;
  background: linear-gradient(135deg, #6d5dfc, #8b5cf6);
  color: #fff;
  font-size: 13px;
  box-shadow: 0 12px 28px rgba(124, 92, 255, 0.3);
}

.menu-toggle {
  display: none;
  justify-self: end;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 99px;
  background: #fff;
  transition: 0.2s ease;
}

.menu-open .menu-toggle span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.menu-open .menu-toggle span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(124, 92, 255, 0.24), transparent 22rem),
    linear-gradient(90deg, transparent 0%, rgba(56, 189, 248, 0.08) 50%, transparent 100%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(360px, 0.82fr) minmax(520px, 1fr);
  gap: clamp(32px, 6vw, 70px);
  align-items: center;
  max-width: 1240px;
  min-height: 500px;
  margin: 0 auto;
  padding: 54px clamp(18px, 5vw, 80px) 40px;
}

.pill {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  margin: 0 0 18px;
  padding: 0 13px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  color: #cbd5e1;
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  max-width: 640px;
  margin: 0;
  font-size: clamp(42px, 5.6vw, 72px);
  line-height: 1.08;
  font-weight: 950;
}

.hero h1 span {
  color: #8ea4ff;
}

.hero-text {
  max-width: 620px;
  margin: 18px 0 0;
  color: #c5d0e2;
  font-size: 16px;
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  min-height: 48px;
  padding: 0 28px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(2, 6, 17, 0.42);
  color: #fff;
}

.btn.primary {
  border-color: transparent;
  background: linear-gradient(135deg, #5b6dff, #7c5cff);
  box-shadow: 0 16px 34px rgba(124, 92, 255, 0.3);
}

.btn.small {
  min-height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--line-hot);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 28px;
  color: #c7d2e5;
  font-size: 13px;
}

.hero-points span::before {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  content: "";
}

.browser-frame {
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.26);
  border-radius: 18px;
  background: rgba(7, 14, 27, 0.92);
  box-shadow: var(--shadow), 0 0 80px rgba(124, 92, 255, 0.14);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.browser-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
}

.browser-bar i:nth-child(2) {
  background: #f59e0b;
}

.browser-bar i:nth-child(3) {
  background: #22c55e;
}

.browser-bar span {
  flex: 1;
  max-width: 210px;
  height: 18px;
  margin-left: auto;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.08);
}

.browser-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top;
}

.section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px clamp(18px, 5vw, 80px);
}

.section-title {
  max-width: 760px;
  margin: 0 auto 22px;
  text-align: center;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.25;
  font-weight: 950;
}

.section-title p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.scenario-card,
.case-feature,
.service-card,
.reason-card,
.process-line,
.price-card,
.faq-item,
.contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02)),
    var(--panel);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.18);
}

.scenario-card {
  min-height: 156px;
  padding: 20px;
  text-align: center;
  transition: 0.22s ease;
}

.scenario-card:hover,
.service-card:hover,
.reason-card:hover,
.price-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-hot);
}

.scenario-card h3 {
  margin: 14px 0 8px;
  font-size: 17px;
}

.scenario-card p,
.service-card p,
.reason-card p,
.price-card p,
.faq-item p,
.contact-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.scenario-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin: 0 auto;
  border: 1px solid rgba(124, 92, 255, 0.48);
  border-radius: 12px;
  background: rgba(124, 92, 255, 0.12);
}

.scenario-icon::before {
  color: #a8b3ff;
  font-size: 22px;
  font-style: normal;
}

.scenario-icon.building::before { content: "▦"; }
.scenario-icon.globe::before { content: "◎"; }
.scenario-icon.mobile::before { content: "▯"; }
.scenario-icon.bot::before { content: "⌘"; }
.scenario-icon.video::before { content: "▷"; }
.scenario-icon.check::before { content: "✓"; }

.case-feature {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 0.9fr;
  gap: 34px;
  align-items: center;
  padding: 28px;
  overflow: hidden;
}

.case-feature-image {
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 12px;
  background: #060d19;
  cursor: pointer;
}

.case-feature-image img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s ease;
}

.case-feature:hover .case-feature-image img {
  transform: scale(1.02);
}

.case-feature-copy h3 {
  margin: 0 0 14px;
  font-size: clamp(25px, 3vw, 34px);
}

.case-feature-copy p {
  margin: 18px 0 0;
  color: #c7d2e5;
  line-height: 1.8;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-tags span {
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.07);
  color: #dce8f8;
  font-size: 13px;
}

.case-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.case-arrow {
  position: absolute;
  top: 18px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font-size: 28px;
}

.case-arrow.prev {
  right: 70px;
}

.case-arrow.next {
  right: 22px;
}

.case-dots {
  display: flex;
  justify-content: center;
  gap: 9px;
  margin-top: 14px;
}

.case-dots button {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.35);
}

.case-dots button.active {
  width: 24px;
  border-radius: 999px;
  background: var(--accent);
}

.service-grid,
.reason-grid,
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.service-card,
.reason-card,
.price-card {
  padding: 24px;
}

.service-card h3,
.reason-card b,
.price-card h3 {
  display: block;
  margin: 14px 0 9px;
  color: #fff;
  font-size: 18px;
}

.icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(124, 92, 255, 0.48);
  border-radius: 14px;
  color: #9ca8ff;
  font-style: normal;
  background: rgba(124, 92, 255, 0.12);
}

.icon.flash::before { content: "↯"; font-size: 31px; }
.icon.upload::before { content: "☁"; font-size: 24px; }
.icon.loop::before { content: "↻"; font-size: 30px; }

.capability-note,
.price-note {
  max-width: 800px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
}

.reason-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.process-line {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 22px;
}

.process-line article {
  position: relative;
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}

.process-line article:not(:last-child)::after {
  position: absolute;
  top: 22px;
  right: -50%;
  width: 100%;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, rgba(124, 92, 255, 0.8), rgba(148, 163, 184, 0.2));
}

.process-line i {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-hot);
  border-radius: 50%;
  background: #091426;
  color: #b8c3ff;
  font-size: 13px;
  font-style: normal;
}

.process-line b {
  font-size: 14px;
}

.price-card div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: start;
}

.price-card.featured {
  border-color: var(--line-hot);
}

.price-card h3 {
  margin-top: 0;
}

.price-card strong {
  color: #9ca8ff;
  font-size: 28px;
  white-space: nowrap;
}

.price-card strong span {
  color: var(--muted);
  font-size: 13px;
}

.price-card ul {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: #d8e2f2;
  font-size: 14px;
}

.price-card li::before {
  margin-right: 8px;
  color: #a78bfa;
  content: "✓";
}

.center-action {
  display: grid;
  place-items: center;
  margin-top: 18px;
}

.faq-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.faq-item {
  padding: 16px;
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.85fr 0.95fr;
  gap: 24px;
  align-items: start;
  padding: 28px;
}

.contact-panel h2 {
  margin: 0 0 10px;
  font-size: clamp(25px, 3vw, 34px);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.contact-panel aside {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.035);
}

.contact-panel aside b {
  display: block;
  margin-bottom: 12px;
}

.contact-panel ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.lead-form {
  display: grid;
  gap: 10px;
}

.lead-form input,
.lead-form textarea {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 10px;
  background: rgba(2, 6, 17, 0.55);
  color: #fff;
  outline: none;
  padding: 12px 13px;
}

.lead-form textarea {
  min-height: 98px;
  resize: vertical;
}

.float-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 75;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, #5b6dff, #7c5cff);
  color: #fff;
  font-weight: 950;
  box-shadow: 0 18px 40px rgba(124, 92, 255, 0.32);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px clamp(18px, 5vw, 80px);
  color: var(--soft);
}

.case-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: none;
  place-items: center;
  padding: 20px;
}

.case-modal.is-open {
  display: grid;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(8px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 0.9fr;
  gap: 24px;
  width: min(920px, 100%);
  max-height: min(720px, 92vh);
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line-hot);
  border-radius: 16px;
  background: #08101e;
  box-shadow: var(--shadow);
}

.modal-panel img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  object-position: top;
  border-radius: 12px;
}

.modal-panel h3 {
  margin: 12px 0;
  font-size: 28px;
}

.modal-panel p {
  color: var(--muted);
  line-height: 1.8;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  background: rgba(2, 5, 13, 0.72);
  color: #fff;
  font-size: 22px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  z-index: 130;
  padding: 12px 18px;
  border: 1px solid rgba(124, 92, 255, 0.34);
  border-radius: 999px;
  background: rgba(8, 13, 25, 0.95);
  color: #fff;
  opacity: 0;
  transform: translate(-50%, 14px);
  transition: 0.22s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.45s ease,
    transform 0.45s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (max-width: 1180px) {
  .scenario-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .faq-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  main {
    padding-top: 64px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    height: 64px;
    padding: 0 16px;
  }

  .brand strong {
    font-size: 16px;
  }

  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 64px;
    right: 12px;
    left: 12px;
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(8, 13, 25, 0.96);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: 0.22s ease;
  }

  .menu-open .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links a {
    padding: 13px;
  }

  .hero-inner,
  .case-feature,
  .modal-panel {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
    gap: 28px;
    padding-top: 40px;
  }

  .service-grid,
  .reason-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .process-line {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .process-line article {
    grid-template-columns: 48px 1fr;
    justify-items: start;
    text-align: left;
    align-items: center;
  }

  .process-line article:not(:last-child)::after {
    display: none;
  }

  .case-arrow {
    top: 14px;
  }
}

@media (max-width: 620px) {
  body {
    padding-bottom: 74px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-text {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn {
    min-height: 50px;
  }

  .hero-points {
    gap: 9px;
    font-size: 12px;
  }

  .section {
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .scenario-grid,
  .faq-strip {
    grid-template-columns: 1fr;
  }

  .scenario-card {
    min-height: 0;
    text-align: left;
  }

  .scenario-icon {
    margin: 0;
  }

  .case-feature {
    padding: 16px;
  }

  .case-arrow {
    width: 34px;
    height: 34px;
    font-size: 22px;
  }

  .case-arrow.prev {
    right: 56px;
  }

  .case-arrow.next {
    right: 14px;
  }

  .price-card div {
    display: block;
  }

  .float-contact {
    right: 12px;
    bottom: 12px;
    left: 12px;
    min-height: 52px;
  }

  .site-footer {
    display: grid;
    justify-items: center;
    text-align: center;
  }
}