/* ============================================
   NeoArts AI — Theme: NEON CYBERPUNK
   深底 / 青洋红霓虹 / 发光描边 / 网格底纹
   ============================================ */

:root {
  --bg: #06040f;
  --bg-2: #0b0620;
  --surface: rgba(255, 255, 255, .04);
  --line: rgba(122, 240, 255, .22);
  --cyan: #2ef2ff;
  --pink: #ff2bd6;
  --violet: #7c3aed;
  --grad-btn: linear-gradient(90deg, #00e5ff 0%, #7c3aed 50%, #ff2bd6 100%);
  --grad-text: linear-gradient(90deg, #2ef2ff 0%, #a78bfa 50%, #ff2bd6 100%);
  --text: #eaf6ff;
  --muted: #93a4c8;
  --radius-btn: 4px;
  --radius-card: 4px;
  --container: 1200px;
  --header-h: 76px;
  --glow-cyan: 0 0 18px rgba(46, 242, 255, .45);
  --glow-pink: 0 0 22px rgba(255, 43, 214, .45);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* 全局网格底纹 + 顶部辉光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 242, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 242, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
}

body > * { position: relative; z-index: 1; }

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: .4px;
  text-transform: uppercase;
  white-space: nowrap;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}

.btn-primary {
  background: var(--grad-btn);
  color: #04060f;
  border-radius: var(--radius-btn);
  box-shadow: 0 0 0 1px rgba(46, 242, 255, .5), 0 8px 28px -6px rgba(124, 58, 237, .8);
  position: relative;
  overflow: hidden;
}

/* 扫描线动效 */
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .55), transparent);
  transition: left .55s ease;
}

.btn-primary:hover::after { left: 130%; }

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px var(--cyan), var(--glow-cyan), 0 14px 34px -8px var(--pink);
}

.btn-sm { padding: 13px 32px; font-size: 14px; }
.btn-lg { padding: 19px 42px; font-size: 16px; }

.icon-upload, .icon-arrow { width: 21px; height: 21px; flex: none; }
.icon-arrow { transition: transform .25s ease; }
.btn:hover .icon-arrow { transform: translateX(4px); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(6, 4, 15, .8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 30px rgba(46, 242, 255, .12);
}

.header-inner {
  max-width: var(--container);
  height: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand {
  font-size: 30px;
  font-weight: 900;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
}

.brand-ai {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 8px rgba(255, 43, 214, .6));
}

.nav-desktop {
  display: flex;
  gap: 44px;
  margin-left: auto;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: #c4d4f0;
}

.nav-desktop a { position: relative; padding: 4px 0; transition: color .2s ease, text-shadow .2s ease; }
.nav-desktop a:hover { color: var(--pink); text-shadow: var(--glow-pink); }

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
  transition: width .25s ease;
}
.nav-desktop a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 14px; }

.nav-toggle {
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  cursor: pointer;
  padding: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
  transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 22px;
  background: rgba(6, 4, 15, .97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.nav-mobile a {
  padding: 13px 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: #c4d4f0;
  border-bottom: 1px solid rgba(46, 242, 255, .1);
}

.nav-mobile .nav-mobile-cta {
  margin-top: 12px;
  text-align: center;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--grad-btn);
  color: #04060f;
  font-weight: 700;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 56px;
  background: var(--bg);
  overflow: hidden;
}

/* 背景霓虹光晕 */
.hero::before {
  content: "";
  position: absolute;
  top: -30%; right: -10%;
  width: 720px; height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 43, 214, .3) 0%, transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.hero-media {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  z-index: 0;
  width: 46%;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 0%;
  filter: saturate(1.25) contrast(1.08) hue-rotate(-8deg);
}

/* 赛博扫描线 */
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    rgba(0, 0, 0, .22) 0px,
    rgba(0, 0, 0, .22) 1px,
    transparent 1px,
    transparent 4px);
  mix-blend-mode: multiply;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg,
    var(--bg) 0%,
    var(--bg) 34%,
    rgba(6, 4, 15, .82) 48%,
    rgba(6, 4, 15, .32) 62%,
    rgba(6, 4, 15, .1) 74%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-copy { flex: 1 1 auto; max-width: 620px; padding: 24px 0; }

.hero h1 {
  font-size: clamp(38px, 4.4vw, 62px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -1px;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 0 30px rgba(46, 242, 255, .25);
}

.hero h1 em {
  font-style: normal;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 16px rgba(255, 43, 214, .5));
}

.hero-sub {
  margin-top: 16px;
  font-size: clamp(17px, 1.8vw, 24px);
  font-weight: 500;
  letter-spacing: .3px;
  color: #b9c9ea;
}

.hero-btn { margin-top: 42px; }

.feature-row { margin-top: 52px; display: flex; align-items: stretch; }

.feature-row li {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 0 10px;
  text-align: center;
  border-right: 1px solid var(--line);
}

.feature-row li:last-child { border-right: none; }

.feature-row svg {
  width: 30px; height: 30px;
  color: var(--cyan);
  filter: drop-shadow(0 0 8px rgba(46, 242, 255, .6));
}

.feature-row span {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: #93a4c8;
  white-space: nowrap;
}

/* floating cards */
.hero-visual {
  flex: 0 0 auto;
  position: relative;
  width: 420px;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.polaroid, .video-card { position: absolute; margin: 0; overflow: hidden; background: #0b0620; }

.polaroid img, .video-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(1.2) contrast(1.05);
}

.polaroid {
  width: 132px; height: 154px;
  padding: 6px 6px 20px;
  transform: rotate(-9deg) translate(-46px, 52px);
  background: #f2f6ff;
  box-shadow: 0 0 0 1px var(--cyan), 0 0 26px rgba(46, 242, 255, .4);
  z-index: 2;
}

.polaroid img { object-position: 60% 25%; }

.flow-arrow {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-16px, 12px);
  z-index: 3;
  color: var(--cyan);
  filter: drop-shadow(0 0 10px rgba(46, 242, 255, .9));
}

.flow-arrow svg { width: 40px; height: 24px; }

.video-card {
  width: 200px; height: 236px;
  border-radius: var(--radius-card);
  border: 1px solid var(--pink);
  box-shadow: 0 0 0 1px rgba(255, 43, 214, .35), 0 0 34px rgba(255, 43, 214, .35);
  transform: translate(34px, 34px);
  z-index: 1;
}

.video-card img { object-position: 62% 22%; }

.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 54px; height: 54px;
  border-radius: var(--radius-btn);
  background: rgba(6, 4, 15, .72);
  border: 1px solid var(--cyan);
  box-shadow: var(--glow-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
}

.play-btn svg { width: 24px; height: 24px; color: var(--cyan); margin-left: 2px; }

.duration {
  position: absolute;
  right: 8px; bottom: 8px;
  padding: 3px 8px;
  border-radius: 2px;
  background: rgba(6, 4, 15, .85);
  border: 1px solid var(--line);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .6px;
}

/* ---------- Showcase ---------- */
.showcase {
  background: var(--bg-2);
  padding: 84px 0 92px;
  color: var(--text);
  border-top: 1px solid var(--line);
  position: relative;
}

.showcase::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--pink), transparent);
  box-shadow: 0 0 18px rgba(46, 242, 255, .6);
}

.section-title {
  text-align: center;
  font-size: clamp(30px, 3.4vw, 46px);
  font-weight: 900;
  letter-spacing: -.5px;
  text-transform: uppercase;
  line-height: 1.12;
  color: #fff;
}

.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(255, 43, 214, .4));
}

.section-sub {
  margin: 18px auto 0;
  max-width: 640px;
  text-align: center;
  font-size: clamp(14px, 1.4vw, 17px);
  color: var(--muted);
}

.grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow: hidden;
  cursor: pointer;
  background: #100a28;
  border: 1px solid var(--line);
  transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
}

.card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease, filter .3s ease;
  filter: saturate(1.15) contrast(1.05);
}

.card:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan), 0 0 30px rgba(46, 242, 255, .3);
  transform: translateY(-4px);
}

.card:hover img { transform: scale(1.06); filter: saturate(1.4) contrast(1.1); }
.card:hover .play-btn { transform: translate(-50%, -50%) scale(1.1); background: rgba(255, 43, 214, .28); }

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 4, 15, 0) 42%, rgba(6, 4, 15, .88) 100%);
  pointer-events: none;
}

.card .play-btn { width: 48px; height: 48px; }
.card .play-btn svg { width: 21px; height: 21px; }

.card-label {
  position: absolute;
  left: 14px; bottom: 12px;
  z-index: 2;
  padding: 7px 14px;
  border-radius: 2px;
  background: rgba(6, 4, 15, .8);
  border-left: 2px solid var(--cyan);
  color: #eaf6ff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
}

.showcase-cta { margin-top: 56px; display: flex; justify-content: center; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg);
  padding: 40px 0 130px;
  color: var(--text);
  border-top: 1px solid var(--line);
}

.footer-inner { display: flex; align-items: center; gap: 32px; }

.brand-light { color: var(--cyan); font-size: 26px; }

.footer-links {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0 auto;
  font-size: 13px;
  letter-spacing: .6px;
  text-transform: uppercase;
  color: #93a4c8;
}

.footer-links a { transition: color .2s ease; }
.footer-links a:hover { color: var(--cyan); }

.footer-links .divider { width: 1px; height: 14px; background: var(--line); }

.footer-social { text-align: right; }

.social-icons { display: flex; justify-content: flex-end; gap: 18px; }

.social-icons a {
  color: #93a4c8;
  transition: color .2s ease, transform .2s ease, filter .2s ease;
}

.social-icons a:hover { color: var(--pink); transform: translateY(-2px); filter: drop-shadow(0 0 8px rgba(255, 43, 214, .8)); }
.social-icons svg { width: 22px; height: 22px; }

.disclaimer { margin-top: 12px; font-size: 12px; color: #5f6b8a; }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1080px) {
  .hero-visual { width: 320px; height: 320px; }
  .polaroid { width: 112px; height: 130px; transform: rotate(-9deg) translate(-40px, 48px); }
  .video-card { width: 168px; height: 198px; transform: translate(20px, 30px); }
  .flow-arrow { transform: translate(-14px, 10px); }
}

@media (max-width: 900px) {
  :root { --header-h: 68px; }

  .container, .header-inner { padding: 0 22px; }
  .brand { font-size: 26px; }

  .nav-desktop { display: none; }
  .header-actions { margin-left: auto; }
  .nav-toggle { display: flex; }
  .header-cta { padding: 11px 22px; font-size: 13px; }

  .nav-mobile.open { display: flex; }

  .hero { padding: calc(var(--header-h) + 22px) 0 40px; }

  .hero::after {
    background: linear-gradient(180deg,
      var(--bg) 0%,
      var(--bg) 44%,
      rgba(6, 4, 15, .7) 70%,
      rgba(6, 4, 15, .2) 100%);
  }

  .hero-media { width: 100%; }
  .hero-media img { object-position: 68% 8%; }

  .hero-inner { flex-direction: column; align-items: stretch; gap: 0; }
  .hero-copy { max-width: none; padding: 0; }
  .hero-btn { margin-top: 30px; }
  .btn-lg { padding: 17px 26px; font-size: 14px; }

  .feature-row { margin-top: 34px; }

  .hero-visual { width: 100%; height: 250px; margin-top: 26px; }

  .polaroid { width: 104px; height: 122px; transform: rotate(-8deg) translate(-46px, 34px); }
  .video-card { width: 152px; height: 178px; transform: translate(14px, 22px); }
  .flow-arrow { transform: translate(-18px, 8px); }
  .play-btn { width: 44px; height: 44px; }
  .play-btn svg { width: 19px; height: 19px; }

  .showcase { padding: 60px 0 68px; }
  .grid { margin-top: 38px; grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .card-label { left: 10px; bottom: 10px; padding: 6px 10px; font-size: 11.5px; }
  .showcase-cta { margin-top: 40px; }
  .showcase-cta .btn { width: 100%; max-width: 420px; }

  .footer-inner { flex-direction: column; text-align: center; gap: 18px; }
  .footer-links { margin: 0; gap: 16px; font-size: 12px; }
  .footer-social { text-align: center; }
  .social-icons { justify-content: center; }
}

@media (max-width: 520px) {
  .container, .header-inner { padding: 0 16px; }

  .hero h1 { letter-spacing: -1px; }
  .hero-btn { width: 100%; padding: 17px 18px; font-size: 14px; }

  .feature-row { flex-wrap: wrap; gap: 18px 0; margin-top: 30px; }
  .feature-row li { flex: 0 0 50%; border-right: none; }
  .feature-row span { font-size: 11.5px; }

  .hero-visual { height: 210px; margin-top: 20px; }
  .polaroid { width: 92px; height: 108px; transform: rotate(-8deg) translate(-34px, 30px); }
  .video-card { width: 134px; height: 158px; transform: translate(18px, 18px); }
  .flow-arrow { transform: translate(-12px, 6px); }

  .section-title { font-size: 27px; }
  .grid { gap: 12px; }
  .card { aspect-ratio: 1 / 1; }
  .card .play-btn { width: 42px; height: 42px; }
  .card-label { font-size: 10.5px; padding: 5px 8px; left: 8px; bottom: 8px; }

  .footer-links { flex-wrap: wrap; justify-content: center; }

  
  
  
  
}