:root {
  --accent: #ff6a00;
  --accent-soft: #ff8533;
  --accent-light: #ffbf2a;
  --bg-main: #0a0a0f;
  --bg-section: #111118;
  --bg-card: #13131a;
  --bg-card-hover: #1a1a25;
  --text-main: #ffffff;
  --text-soft: #a1a1aa;
  --text-muted: #71717a;
  --border: #27272a;
  --border-strong: rgba(255, 106, 0, 0.34);
  --purple-support: #5341ff;
  --container: 1200px;
  --shadow-glow: 0 0 44px rgba(255, 106, 0, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text-main);
  background: var(--bg-main);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Microsoft YaHei",
    Arial,
    sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

.container {
  width: min(100% - 48px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 max(24px, calc((100vw - var(--container)) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 10, 15, 0.82);
  backdrop-filter: blur(18px);
  transition:
    background 180ms ease,
    border-color 180ms ease;
}

.site-header.is-scrolled {
  border-color: rgba(255, 106, 0, 0.2);
  background: rgba(10, 10, 15, 0.94);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
}

.brand-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.brand-text {
  color: var(--text-main);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 13px;
  border-radius: 8px;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 600;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links .nav-cta {
  margin-left: 8px;
  color: var(--text-main);
  background: linear-gradient(135deg, #e55f00, var(--accent));
  box-shadow: 0 8px 22px rgba(255, 106, 0, 0.24);
}

.nav-links .nav-cta:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-main);
  background: var(--bg-card);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 2px;
  background: currentColor;
  transition:
    transform 160ms ease,
    opacity 160ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 24px 72px;
  background:
    linear-gradient(180deg, rgba(255, 106, 0, 0.08), transparent 38%),
    linear-gradient(135deg, #0a0a0f 0%, #111118 68%, #0d0d14 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  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: 54px 54px;
  mask-image: linear-gradient(180deg, #000000 0%, transparent 86%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(380px, 0.98fr);
  align-items: center;
  gap: 72px;
  width: min(100%, var(--container));
  min-height: 610px;
  margin: 0 auto;
}

.eyebrow,
.section-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 30px;
  margin: 0 0 18px;
  padding: 0 14px;
  border: 1px solid rgba(255, 106, 0, 0.3);
  border-radius: 999px;
  color: var(--accent-soft);
  background: rgba(255, 106, 0, 0.1);
  font-size: 14px;
  font-weight: 700;
}

.hero h1,
.section-header h2,
.contact h2 {
  margin: 0;
  color: var(--text-main);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 660px;
  font-size: 64px;
}

.hero-lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--text-soft);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 800;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--text-main);
  background: linear-gradient(135deg, #e55f00, var(--accent));
  box-shadow: 0 14px 34px rgba(255, 106, 0, 0.28);
}

.button-secondary {
  color: var(--text-soft);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.button-secondary:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
  background: rgba(255, 106, 0, 0.08);
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 690px;
  margin-top: 46px;
}

.hero-points div {
  min-height: 108px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(19, 19, 26, 0.82);
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    background 180ms ease;
}

.hero-points div:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.hero-points strong {
  display: block;
  color: var(--text-main);
  font-size: 18px;
}

.hero-points span {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 24px;
}

.hero-logo-card {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 500px);
  aspect-ratio: 1;
}

.hero-logo-card::before {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(255, 106, 0, 0.28);
  border-radius: 50%;
  box-shadow:
    inset 0 0 36px rgba(255, 106, 0, 0.08),
    0 0 80px rgba(255, 106, 0, 0.16);
}

.hero-logo-card::after {
  content: "";
  position: absolute;
  inset: 25%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.hero-logo-card img {
  position: relative;
  z-index: 2;
  width: 56%;
  max-width: 280px;
  filter:
    drop-shadow(0 22px 42px rgba(0, 0, 0, 0.48))
    drop-shadow(0 0 34px rgba(255, 106, 0, 0.3));
  animation: floatLogo 4s ease-in-out infinite;
}

.orbit-line {
  position: absolute;
  inset: 16%;
  border: 1px solid rgba(255, 106, 0, 0.22);
  border-radius: 50%;
}

.orbit-line-a {
  transform: rotate(18deg) scaleX(1.16);
}

.orbit-line-b {
  border-color: rgba(255, 255, 255, 0.08);
  transform: rotate(-24deg) scaleX(0.92);
}

.hero-visual-caption {
  display: grid;
  gap: 3px;
  min-width: 260px;
  padding: 15px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
  background: rgba(19, 19, 26, 0.86);
  box-shadow: var(--shadow-glow);
}

.hero-visual-caption span {
  color: var(--accent-soft);
  font-size: 13px;
  font-weight: 800;
}

.hero-visual-caption strong {
  color: var(--text-main);
  font-size: 18px;
}

.section {
  padding: 98px 0;
  background: var(--bg-main);
}

.section-muted {
  background: var(--bg-section);
}

.section-header {
  max-width: 760px;
  margin: 0 auto 54px;
  text-align: center;
}

.section-header h2,
.contact h2 {
  font-size: 42px;
}

.section-header p,
.contact p {
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: 17px;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 32px;
  align-items: stretch;
}

.about-copy {
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 106, 0, 0.08), transparent 52%),
    var(--bg-card);
}

.about-copy h3 {
  margin: 0 0 18px;
  color: var(--text-main);
  font-size: 28px;
  line-height: 1.25;
}

.about-copy p {
  margin: 0;
  color: var(--text-soft);
}

.about-copy p + p {
  margin-top: 18px;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.about-card,
.feature-card,
.edition-card,
.advantage-item,
.contact-cards a {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.about-card:hover,
.feature-card:hover,
.edition-card:hover,
.advantage-item:hover,
.contact-cards a:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.about-card {
  padding: 26px;
}

.about-card span,
.feature-icon,
.advantage-item > span {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 34px;
  padding: 0 10px;
  border-radius: 8px;
  color: var(--text-main);
  background: linear-gradient(135deg, #e55f00, var(--accent));
  font-size: 13px;
  font-weight: 900;
}

.about-card h3,
.feature-card h3,
.edition-card h3,
.advantage-item h3 {
  margin: 22px 0 10px;
  color: var(--text-main);
  font-size: 22px;
  line-height: 1.25;
}

.about-card p,
.feature-card p,
.edition-card p,
.advantage-item p {
  margin: 0;
  color: var(--text-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-card {
  min-height: 286px;
  padding: 30px;
}

.scenario-shell {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
}

.scenario-tabs {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  border-bottom: 1px solid var(--border);
  background: #0d0d14;
}

.scenario-tab {
  min-height: 44px;
  padding: 0 28px;
  border: 0;
  border-radius: 999px;
  color: var(--text-soft);
  background: transparent;
  font-weight: 800;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.scenario-tab:hover {
  color: var(--text-main);
}

.scenario-tab.is-active {
  color: var(--text-main);
  background: linear-gradient(135deg, #e55f00, var(--accent));
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.24);
}

.scenario-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 24px;
}

.scenario-panel.is-active {
  display: grid;
}

.scenario-panel[hidden] {
  display: none;
}

.scenario-card {
  display: grid;
  grid-template-rows: auto 1fr;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.scenario-card-head {
  padding: 22px 24px 0;
}

.scenario-badge {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 34px;
  padding: 0 10px;
  border-radius: 8px;
  color: var(--accent-soft);
  background: rgba(255, 106, 0, 0.12);
  border: 1px solid rgba(255, 106, 0, 0.25);
  font-size: 13px;
  font-weight: 900;
}

.scenario-card-head h3 {
  margin: 16px 0 0;
  color: var(--text-main);
  font-size: 20px;
  line-height: 1.3;
}

.scenario-card-body {
  display: grid;
  gap: 14px;
  padding: 18px 24px 24px;
}

.scenario-pain,
.scenario-solution,
.scenario-result {
  padding: 14px 16px;
  border-radius: 8px;
}

.scenario-pain {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.18);
}

.scenario-solution {
  background: rgba(255, 106, 0, 0.06);
  border: 1px solid rgba(255, 106, 0, 0.18);
}

.scenario-result {
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.18);
}

.scenario-label {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.scenario-pain .scenario-label {
  color: #f87171;
}

.scenario-solution .scenario-label {
  color: var(--accent-soft);
}

.scenario-result .scenario-label {
  color: #4ade80;
}

.scenario-pain p,
.scenario-solution p,
.scenario-result p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.6;
}

.edition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.edition-card {
  min-height: 520px;
  padding: 34px;
  border-color: rgba(83,65,255,.8);
  box-shadow: 0 0 44px rgba(83,65,255,.18);
}

.edition-card:hover{
  border-color: rgba(83,65,255,.8);
  box-shadow: 0 0 44px rgba(83,65,255,.18);
}

.edition-card-featured,.edition-card-featured:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
}

.edition-head span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--text-main);
  background: #5341ff;
  font-size: 13px;
  font-weight: 900;
}
.edition-card-featured .edition-head span {
    background: linear-gradient(135deg, #e55f00, var(--accent));
}

.edition-head h3 {
  margin-top: 22px;
  font-size: 32px;
}

.edition-card ul {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.edition-card li {
  position: relative;
  padding-left: 22px;
  color: var(--text-soft);
}

.edition-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5341ff;
}
.edition-card-featured li::before {
    background: var(--accent);
}

.advantage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.advantage-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.advantage-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  min-height: auto;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.advantage-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.advantage-item h3 {
  margin-top: 0;
}

.advantage-video {
  position: sticky;
  top: 100px;
}

.video-wrapper {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  aspect-ratio: 16 / 9;
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.4),
    0 0 60px rgba(255, 106, 0, 0.08);
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-caption {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
}

.contact {
  padding: 90px 0;
  background:
    linear-gradient(180deg, rgba(255, 106, 0, 0.06), transparent 55%),
    var(--bg-main);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 46px;
  align-items: center;
}

.contact-cards {
  display: grid;
  gap: 14px;
}

.contact-cards a {
  display: grid;
  gap: 6px;
  min-height: 102px;
  padding: 22px;
}

.contact-cards span {
  color: var(--text-muted);
  font-size: 14px;
}

.contact-cards strong {
  color: var(--text-main);
  font-size: 24px;
}

.site-footer {
  padding: 42px 0;
  border-top: 1px solid var(--border);
  background: #07070c;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 22px;
  width: min(100% - 48px, var(--container));
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-inner img {
  width: 30px;
  height: 30px;
}

.footer-inner p {
  margin: 0;
  color: var(--text-main);
  font-weight: 700;
}

.footer-inner a:hover {
  color: var(--accent-soft);
}

.reveal {
  opacity: 1;
  transform: none;
}

.reveal.is-visible {
  animation: revealIn 520ms ease both;
}

@keyframes floatLogo {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes revealIn {
  from {
    opacity: 1;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1120px) {
  .hero-inner,
  .about-layout {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    gap: 40px;
    min-height: 0;
  }

  .hero-visual {
    order: -1;
  }

  .hero-logo-card {
    max-width: 420px;
  }

  .about-cards,
  .feature-grid,
  .scenario-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .advantage-layout {
    grid-template-columns: 1fr;
  }

  .advantage-video {
    position: static;
  }
}

@media (max-width: 900px) {
  .site-header {
    padding: 0 18px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 72px 14px auto 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: rgba(19, 19, 26, 0.98);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
  }

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

  .nav-links a {
    justify-content: flex-start;
    min-height: 44px;
  }

  .nav-links .nav-cta {
    margin-left: 0;
  }

  .hero {
    padding-top: 104px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .section-header h2,
  .contact h2 {
    font-size: 34px;
  }

  .about-cards,
  .edition-grid,
  .contact-inner {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  html {
    scroll-padding-top: 72px;
  }

  .container,
  .footer-inner {
    width: min(100% - 36px, var(--container));
  }

  .hero {
    padding: 92px 18px 36px;
  }

  .hero-inner {
    gap: 22px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-visual {
    order: 2;
    gap: 12px;
  }

  .hero-logo-card {
    width: min(72vw, 230px);
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-lead,
  .section-header p,
  .contact p {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    gap: 10px;
    margin-top: 24px;
  }

  .button {
    width: 100%;
    min-height: 46px;
  }

  .hero-points,
  .feature-grid,
  .scenario-panel {
    grid-template-columns: 1fr;
  }

  .scenario-panel {
    padding: 16px;
  }

  .advantage-layout {
    grid-template-columns: 1fr;
  }

  .advantage-video {
    position: static;
  }

  .hero-points {
    display: none;
  }

  .hero-visual-caption {
    min-width: min(100%, 230px);
    padding: 10px 12px;
  }

  .hero-visual-caption strong {
    font-size: 15px;
  }

  .section {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 36px;
    text-align: left;
  }

  .section-header h2,
  .contact h2 {
    font-size: 30px;
  }

  .about-copy,
  .about-card,
  .feature-card,
  .edition-card,
  .advantage-item {
    padding: 24px;
  }

  .about-card,
  .feature-card,
  .edition-card,
  .scenario-card,
  .advantage-item {
    min-height: auto;
  }

  .scenario-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scenario-tab {
    padding: 0 12px;
  }

  .advantage-item {
    grid-template-columns: 1fr;
  }

  .contact {
    padding: 72px 0;
  }

  .contact-cards strong {
    font-size: 21px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}