:root {
  --bg: #07090d;
  --bg-2: #0f141c;
  --text: #f4f1ea;
  --mute: rgba(244, 241, 234, 0.62);
  --line: rgba(244, 241, 234, 0.1);
  --ember: #ff7a2f;
  --ember-deep: #e25510;
  --gold: #e8c07a;
  --teal: #2ec4b6;
  --font-display: "Syne", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", system-ui, sans-serif;
  --max: 1320px;
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.orb {
  position: fixed;
  border-radius: 40% 60% 55% 45%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}
.orb--a {
  width: min(42vw, 420px); height: min(42vw, 420px);
  top: -6%; left: -6%;
  background: rgba(255, 122, 47, 0.32);
}
.orb--b {
  width: min(34vw, 360px); height: min(34vw, 360px);
  right: -4%; top: 22%;
  background: rgba(46, 196, 182, 0.18);
}
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 65% 55% at 50% 25%, #000 15%, transparent 70%);
  opacity: 0.55;
}

/* —— Nav —— */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 9, 13, 0.78);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav__back {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(244, 241, 234, 0.88);
  font-size: 0.82rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.nav__back:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav__brand img {
  height: 42px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  object-position: left center;
  border-radius: 8px;
  flex-shrink: 0;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 8px;
  margin-right: auto;
  font-size: 0.88rem;
  color: var(--mute);
}
.nav__links a {
  padding: 6px 10px;
  border-radius: 8px;
  white-space: nowrap;
}
.nav__links a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav__links a.is-active {
  color: var(--text);
  background: rgba(255, 122, 47, 0.12);
}
.nav__actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.nav__burger {
  display: none;
  background: transparent;
  border: 0;
  color: var(--text);
  font-size: 1.35rem;
  cursor: pointer;
  margin-left: auto;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border-radius: 999px;
  transition: transform 0.15s, box-shadow 0.2s, border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.btn--sm { padding: 7px 14px; font-size: 0.84rem; }
.btn--lg { padding: 13px 24px; font-size: 0.98rem; }
.btn--primary {
  background: linear-gradient(135deg, var(--ember), var(--ember-deep));
  color: #fff8f0;
  box-shadow: 0 8px 22px rgba(226, 85, 16, 0.28);
}
.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(226, 85, 16, 0.4);
}
.btn--outline {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--text);
}
.btn--outline:hover { border-color: rgba(255,122,47,0.45); }
.btn--ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mute);
}
.btn--ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.22); }

/* —— Hero —— */
.hero {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 20px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px 40px;
  align-items: center;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid rgba(46, 196, 182, 0.35);
  background: rgba(46, 196, 182, 0.08);
  color: #9aefe4;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.pill__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #2ec4b6;
  box-shadow: 0 0 8px #2ec4b6;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.hero__brand {
  display: block;
  font-size: clamp(1.9rem, 3.8vw, 2.75rem);
  margin-bottom: 10px;
}
.hero__line {
  display: block;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--gold);
  font-weight: 700;
  line-height: 1.4;
}
.hero__lede {
  margin-top: 16px;
  color: var(--mute);
  line-height: 1.75;
  font-size: 0.98rem;
  max-width: 34em;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.hero__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding-top: 0;
  border-top: 0;
}
.hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  min-width: 118px;
}
.hero__stats strong {
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--ember);
}
.hero__stats span { font-size: 0.78rem; color: var(--mute); }

.hero__visual { position: relative; min-width: 0; }
.mock {
  position: relative;
  z-index: 2;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.14);
  background: #0c1118;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}
.mock__glow {
  position: absolute;
  inset: 18% 0 -12% 20%;
  background: radial-gradient(circle, rgba(255,122,47,0.3), transparent 65%);
  filter: blur(28px);
  z-index: 1;
  pointer-events: none;
}
.mock__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  background: #151b24;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mock__bar span {
  width: 9px; height: 9px; border-radius: 50%;
  background: #3a4250;
}
.mock__bar span:nth-child(1) { background: #ff5f57; }
.mock__bar span:nth-child(2) { background: #febc2e; }
.mock__bar span:nth-child(3) { background: #28c840; }
.mock__bar em {
  margin-left: 10px;
  font-style: normal;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
}
.mock__shot {
  position: relative;
  min-height: 260px;
  background:
    linear-gradient(160deg, rgba(255,122,47,0.12), transparent 50%),
    #10161f;
}
.mock__shot img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: top center;
  vertical-align: top;
}
.mock__shot img.is-missing {
  min-height: 260px;
  object-fit: none;
  opacity: 0.35;
  background:
    repeating-linear-gradient(-45deg, transparent, transparent 8px, rgba(255,255,255,0.04) 8px, rgba(255,255,255,0.04) 16px);
}

/* —— Sections —— */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 44px 20px;
}
.section--tint {
  max-width: none;
  padding: 44px 0;
  background: linear-gradient(180deg, rgba(255,122,47,0.035), transparent 45%, rgba(46,196,182,0.03));
}
.section--tint > .section__head,
.section--tint > .cat-band,
.section--tint > .shots {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.section__head {
  margin-bottom: 28px;
  max-width: 560px;
}
.section--tint > .section__head {
  max-width: 560px;
}
.eyebrow {
  color: var(--ember);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.8vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.section__sub {
  margin-top: 8px;
  color: var(--mute);
  line-height: 1.65;
  font-size: 0.95rem;
}

.feat-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.feat {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 18px;
  min-height: 148px;
}
.feat__num {
  font-family: var(--font-display);
  font-weight: 800;
  color: rgba(255,122,47,0.55);
  font-size: 0.88rem;
  margin-bottom: 10px;
}
.feat h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
  line-height: 1.35;
}
.feat p {
  color: var(--mute);
  font-size: 0.88rem;
  line-height: 1.65;
}

.cat-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.cat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 128px;
  padding: 24px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255,122,47,0.12), transparent 60%),
    var(--bg-2);
  transition: transform 0.2s, border-color 0.2s;
}
.cat--warm {
  background:
    linear-gradient(145deg, rgba(232,192,122,0.14), transparent 60%),
    var(--bg-2);
}
.cat--cool {
  background:
    linear-gradient(145deg, rgba(46,196,182,0.12), transparent 60%),
    var(--bg-2);
}
.cat:hover {
  transform: translateY(-2px);
  border-color: rgba(255,122,47,0.4);
}
.cat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.cat span { color: var(--mute); font-size: 0.88rem; line-height: 1.5; }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 20px;
}
.tech {
  padding: 16px 16px 16px 18px;
  border-left: 2px solid var(--ember);
  background: linear-gradient(90deg, rgba(255,122,47,0.06), transparent 75%);
  border-radius: 0 10px 10px 0;
}
.tech h3 { margin-bottom: 6px; font-size: 1rem; }
.tech p { color: var(--mute); font-size: 0.88rem; line-height: 1.65; }

.shots {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.shot__frame {
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0c1118;
  overflow: hidden;
  aspect-ratio: 16/10;
  margin-bottom: 10px;
}
.shot__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}
.shot__frame img.is-missing {
  opacity: 0.3;
  background:
    repeating-linear-gradient(-45deg, transparent, transparent 8px, rgba(255,255,255,0.04) 8px, rgba(255,255,255,0.04) 16px);
}
.shot figcaption {
  color: var(--mute);
  font-size: 0.86rem;
  line-height: 1.5;
}
.shot figcaption strong {
  display: block;
  color: var(--text);
  margin-bottom: 2px;
  font-size: 0.95rem;
}

/* Download — XD-style full-bleed brand section + glass shell + inner card */
.download {
  position: relative;
  z-index: 1;
  padding: 96px 20px;
  margin-top: 0;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(135deg, #e25510 0%, #ff7a2f 38%, #2ec4b6 100%);
}
.download::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 70% at 12% 40%, rgba(255, 255, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 45% 60% at 92% 70%, rgba(0, 0, 0, 0.12), transparent 50%);
  pointer-events: none;
}
.download__wrap {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}
.download__intro {
  text-align: center;
  margin-bottom: 28px;
}
.download__intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 10px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
}
.download__intro p {
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.05rem;
  line-height: 1.55;
}
.download__shell {
  padding: 36px 30px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}
.download__card {
  text-align: center;
  padding: 40px 36px 30px;
  border-radius: 20px;
  background: #fff;
  border: none;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}
.download__win {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: #1a1a1a;
  background: #ffd600;
  box-shadow: 0 8px 22px rgba(255, 214, 0, 0.35);
}
.download__card h3 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  color: #1a1f2b;
  margin-bottom: 8px;
}
.download__sys {
  color: #6b7280;
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.download__ver {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #1a1a1a;
  background: #ffd600;
  margin-bottom: 20px;
}
.download__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 15px 20px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 1.08rem;
  color: #fff;
  background: linear-gradient(135deg, #ff7a2f, #e25510);
  box-shadow: 0 10px 28px rgba(226, 85, 16, 0.4);
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
}
.download__cta:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 14px 34px rgba(226, 85, 16, 0.5);
}
.download__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  margin: 18px 0 22px;
}
.download__links a {
  color: #6b7280;
  font-size: 0.9rem;
  font-weight: 600;
}
.download__links a:hover { color: #e25510; }
.download__tip {
  margin: 0;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.86rem;
  line-height: 1.55;
  text-align: left;
  color: #4b5563;
  background: rgba(255, 214, 0, 0.1);
  border: 1px solid rgba(255, 214, 0, 0.35);
  border-left: 4px solid #ffd600;
}
.download__tip strong {
  color: #b45309;
  font-weight: 700;
}

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 32px 20px 24px;
  background: #05070a;
}
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr auto;
  gap: 28px;
  align-items: start;
}
.footer__brand {
  display: flex;
  gap: 12px;
  max-width: 360px;
}
.footer__brand img {
  height: 40px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  border-radius: 8px;
}
.footer__brand strong {
  font-family: var(--font-display);
  display: block;
  margin-bottom: 4px;
}
.footer__brand p { color: var(--mute); font-size: 0.86rem; line-height: 1.5; }
.footer__cols {
  display: flex;
  gap: 40px;
}
.footer__cols h4 {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
}
.footer__cols a {
  display: block;
  color: var(--mute);
  font-size: 0.88rem;
  margin-bottom: 7px;
}
.footer__cols a:hover { color: var(--text); }
.footer__copy {
  max-width: var(--max);
  margin: 22px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: rgba(244,241,234,0.35);
  font-size: 0.78rem;
}

.to-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(16,22,32,0.92);
  border: 1px solid var(--line);
  color: var(--gold);
  font-size: 1rem;
}

@media (max-width: 980px) {
  .nav__back {
    padding: 5px 10px;
    font-size: 0.75rem;
  }
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(7,9,13,0.97);
    padding: 12px 16px 16px;
    border-bottom: 1px solid var(--line);
    gap: 2px;
    margin: 0;
  }
  .nav__links.is-open { display: flex; }
  .nav__burger { display: block; }
  .nav__actions .btn--ghost { display: none; }
  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 24px;
  }
  .mock { max-width: 460px; margin: 0 auto; }
  .feat-rail,
  .cat-band,
  .tech-grid,
  .shots { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .feat-rail,
  .cat-band,
  .tech-grid,
  .shots { grid-template-columns: 1fr; }
  .feat { min-height: 0; }
  .hero__stats li { flex: 1 1 calc(50% - 10px); }
  .footer__cols { gap: 28px; }
  .download__shell { padding: 28px 18px; border-radius: 22px; }
  .download__card { padding: 28px 18px 22px; }
  .download__intro h2 { font-size: 1.65rem; }
  .download__tip { margin: 0; }
}

/* —— 点击放大 —— */
.zoom-hit {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
  overflow: hidden;
}
.zoom-hit img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.25s ease, filter 0.25s ease;
}
.mock__shot .zoom-hit img {
  height: auto;
  max-height: 420px;
  object-fit: cover;
}
.zoom-hit__tip {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.96);
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(18, 12, 28, 0.82);
  border: 1px solid rgba(255, 122, 47, 0.45);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 10px 28px rgba(0,0,0,0.35);
}
.zoom-hit:hover img,
.zoom-hit:focus-visible img {
  transform: scale(1.03);
  filter: brightness(0.72);
}
.zoom-hit:hover .zoom-hit__tip,
.zoom-hit:focus-visible .zoom-hit__tip {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
}
.lightbox[hidden] { display: none !important; }
.lightbox__panel {
  width: min(1080px, 94vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  background: #121820;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.lightbox__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: #0e131b;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.lightbox__bar strong {
  font-size: 0.95rem;
  color: var(--text);
}
.lightbox__close {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox__close:hover { background: rgba(255,122,47,0.25); }
.lightbox__body {
  padding: 12px;
  overflow: auto;
  text-align: center;
}
.lightbox__body img {
  display: inline-block;
  max-width: 100%;
  max-height: calc(90vh - 88px);
  height: auto;
  border-radius: 8px;
}