:root {
  --bg: #07080c;
  --bg-elevated: #101218;
  --surface: #161821;
  --surface-2: #1c1f2b;
  --text: #f4f1ea;
  --muted: #9aa0b2;
  --line: rgba(244, 241, 234, 0.1);
  --accent: #ffb020;
  --accent-2: #ff6b3d;
  --accent-soft: rgba(255, 176, 32, 0.14);
  --ok: #3dcc8c;
  --warn: #f0b429;
  --radius: 18px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --font: "Bahnschrift", "Avenir Next", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --display: "Bahnschrift SemiBold", "Avenir Next Condensed", "Segoe UI Semibold", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Mono", "Consolas", "SFMono-Regular", monospace;
  --max: 1160px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 45% at 50% -10%, rgba(255, 176, 32, 0.22), transparent 60%),
    radial-gradient(ellipse 40% 35% at 90% 20%, rgba(255, 107, 61, 0.12), transparent 55%),
    radial-gradient(ellipse 35% 30% at 10% 70%, rgba(255, 176, 32, 0.08), transparent 50%),
    linear-gradient(180deg, #07080c 0%, #0c0e14 50%, #07080c 100%);
}

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

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

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 8, 12, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  letter-spacing: 0.04em;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #120d05;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 0 28px rgba(255, 176, 32, 0.35);
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 700;
}

.logo-text span {
  color: var(--accent);
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
  color: var(--muted);
}

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

.lang-switch {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
}

.lang-switch button.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.hero {
  position: relative;
  padding: 88px 0 72px;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
}

.hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: min(920px, 90%);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(255, 176, 32, 0.55), transparent);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.launch-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 176, 32, 0.35);
  background: rgba(255, 176, 32, 0.08);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: badgePulse 2.8s ease-in-out infinite;
}

.launch-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 18px;
}

.tag {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  background: rgba(255, 255, 255, 0.03);
}

.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
  animation: riseIn 0.9s ease both;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 20px 0 0;
  max-width: 540px;
  color: var(--muted);
  font-size: 1.05rem;
  animation: riseIn 1s ease 0.1s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  animation: riseIn 1.05s ease 0.18s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #140f06;
  box-shadow: 0 12px 40px rgba(255, 176, 32, 0.28);
}

.btn-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.trust-item strong {
  display: block;
  font-family: var(--display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.trust-item span {
  color: var(--muted);
  font-size: 0.88rem;
}

.hero-visual {
  position: relative;
  animation: floatIn 1.2s ease 0.15s both;
}

.hero-stage {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 176, 32, 0.2);
  box-shadow: var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  background: var(--surface);
}

.hero-stage img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(7, 8, 12, 0.75) 100%);
  z-index: 1;
  pointer-events: none;
}

.hero-caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 20px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: rgba(244, 241, 234, 0.85);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.spotlight {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 176, 32, 0.28), transparent 70%);
  filter: blur(8px);
  animation: glowShift 6s ease-in-out infinite;
  pointer-events: none;
}

.spotlight.s1 { top: -40px; right: -20px; }
.spotlight.s2 { bottom: 20px; left: -30px; animation-delay: -2s; }

.section {
  padding: 88px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
}

.section-head {
  max-width: 680px;
  margin-bottom: 40px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}

.section-head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
}

.grid-5,
.grid-3,
.grid-2,
.grid-6,
.compat-grid,
.scene-grid {
  display: grid;
  gap: 16px;
}

.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-6 { grid-template-columns: repeat(3, 1fr); }
.compat-grid { grid-template-columns: repeat(4, 1fr); }
.scene-grid { grid-template-columns: repeat(3, 1fr); }

.platform-card,
.feature-card,
.plan-card,
.step-card,
.scene-card,
.compat-item,
.faq-item,
.panel,
.dl-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.platform-card:hover,
.feature-card:hover,
.plan-card:hover,
.scene-card:hover,
.dl-card:hover {
  border-color: rgba(255, 176, 32, 0.35);
  transform: translateY(-3px);
  background: linear-gradient(180deg, rgba(255, 176, 32, 0.08), rgba(255, 255, 255, 0.02));
}

.platform-card h3,
.feature-card h3,
.plan-card h3,
.step-card h3,
.scene-card h3,
.dl-card h3 {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: 1.2rem;
}

.meta-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.meta-line span:last-child {
  color: var(--text);
  text-align: right;
}

.status {
  color: var(--ok) !important;
}

.feature-card p,
.scene-card p,
.compat-item p,
.step-card p,
.plan-card p,
.dl-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 700;
}

.how-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.flow-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  align-items: start;
}

.flow-num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #140f06;
  font-weight: 700;
  font-family: var(--display);
}

.flow-list h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.flow-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.panel-media {
  overflow: hidden;
  padding: 0;
}

.panel-media img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.code-block {
  margin: 0;
  padding: 18px 20px;
  background: #0b0d13;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.82rem;
  color: #d7dbe8;
  overflow-x: auto;
  line-height: 1.7;
}

.code-block .c { color: #7f879a; }
.code-block .k { color: var(--accent); }
.code-block .v { color: #7fd6a8; }

.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.capability-list span {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.03);
}

.compat-item h3,
.scene-card h3 {
  margin-bottom: 8px;
}

.plan-card .meta-line:last-of-type {
  border-bottom: 0;
  margin-bottom: 16px;
}

.step-card .step-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

.tips {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(240, 180, 41, 0.25);
  background: rgba(240, 180, 41, 0.08);
  color: #f3dfb0;
}

.tips strong {
  color: var(--warn);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 12px 0 0;
  color: var(--muted);
}

.cta {
  padding: 40px 0 20px;
}

.cta-panel {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  padding: 48px 40px;
  border: 1px solid rgba(255, 176, 32, 0.28);
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 176, 32, 0.18), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(255, 107, 61, 0.16), transparent 40%),
    linear-gradient(135deg, #151821, #0e1018);
  text-align: center;
}

.cta-panel h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.cta-panel p {
  margin: 12px auto 0;
  max-width: 520px;
  color: var(--muted);
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.site-footer {
  padding: 64px 0 36px;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 28px;
}

.site-footer h3 {
  margin: 0 0 14px;
  font-size: 0.95rem;
  font-family: var(--display);
}

.site-footer p,
.site-footer a,
.site-footer li {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

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

.footer-bottom {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.page-hero {
  padding: 72px 0 36px;
}

.page-hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.12;
}

.page-hero p {
  margin: 14px 0 0;
  color: var(--muted);
  max-width: 640px;
}

.media-strip {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 16px;
  margin: 28px 0 8px;
}

.media-strip img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.dl-card .btn {
  margin-top: 16px;
  width: 100%;
}

.tutorial-block + .tutorial-block {
  margin-top: 28px;
}

.inline-shot {
  margin-top: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
}

.inline-shot img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes floatIn {
  from { opacity: 0; transform: translateY(28px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 176, 32, 0.25); }
  50% { box-shadow: 0 0 0 10px rgba(255, 176, 32, 0); }
}

@keyframes glowShift {
  0%, 100% { transform: translate(0, 0); opacity: 0.8; }
  50% { transform: translate(-12px, 10px); opacity: 1; }
}

@media (max-width: 1024px) {
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .compat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .hero-grid,
  .how-grid,
  .grid-3,
  .grid-2,
  .grid-6,
  .scene-grid,
  .media-strip,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 56px 0 48px; min-height: auto; }
  .section { padding: 64px 0; }
  .cta-panel { padding: 36px 22px; }
}

@media (max-width: 560px) {
  .grid-5,
  .compat-grid { grid-template-columns: 1fr; }
  .trust-row { gap: 18px; }
  .container { width: min(var(--max), calc(100% - 28px)); }
}