/* ============================================================
   FLYINGPOS — Product Matrix
   深色科技风：深空底 · 极光渐变 · 玻璃拟态 · 霓虹光效
   ============================================================ */

:root {
  --bg: #04060d;
  --bg-2: #070b16;
  --ink: #e9eefb;
  --muted: #8a95b2;
  --line: rgba(140, 160, 210, .14);

  --cyan: #00e5ff;
  --blue: #4d7cfe;
  --hot: #ff6b3d;

  /* 行业色 */
  --c-visa: #00e5ff;
  --c-fnb: #ff8a3d;
  --c-retail: #3dffa0;
  --c-service: #ff4d8f;
  --c-finance: #ffd166;

  --font-display: 'Chakra Petch', 'Noto Sans SC', sans-serif;
  --font-body: 'Be Vietnam Pro', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 18px;
  --max: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(0, 229, 255, .3); }
a { color: inherit; text-decoration: none; }
.mono { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em; }

/* ---------- 背景层 ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background-image:
    linear-gradient(rgba(120,150,220,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,150,220,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 100%);
}
.bg-aurora { position: fixed; inset: 0; z-index: -4; overflow: hidden; pointer-events: none; }
.aurora {
  position: absolute; border-radius: 50%; filter: blur(110px); opacity: .5;
  animation: drift 24s ease-in-out infinite alternate;
}
.a1 { width: 55vw; height: 55vw; left: -15vw; top: -20vw; background: radial-gradient(circle, rgba(0,90,140,.55), transparent 65%); }
.a2 { width: 45vw; height: 45vw; right: -12vw; top: 8vw; background: radial-gradient(circle, rgba(60,40,160,.4), transparent 65%); animation-delay: -8s; }
.a3 { width: 40vw; height: 40vw; left: 30vw; top: 55vh; background: radial-gradient(circle, rgba(0,120,110,.28), transparent 65%); animation-delay: -16s; }
@keyframes drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(6vw, 4vw) scale(1.15); }
}
.bg-noise {
  position: fixed; inset: 0; z-index: -2; pointer-events: none; opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .35s, border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 8, 16, .72);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: .06em; }
.brand-mark { color: var(--cyan); font-size: 1.2rem; text-shadow: 0 0 14px var(--cyan); }
.brand-name em { font-style: normal; color: var(--cyan); }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: .88rem; color: var(--muted); position: relative; transition: color .25s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -5px; width: 0; height: 1px;
  background: var(--cyan); transition: width .3s;
}
.nav-links a:hover::after { width: 100%; }
.lang-switch {
  display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden;
  background: rgba(255,255,255,.03);
}
.lang-switch button {
  border: 0; background: transparent; color: var(--muted); cursor: pointer;
  padding: 6px 14px; font-family: var(--font-mono); font-size: .75rem; transition: all .25s;
}
.lang-switch button.active { background: var(--cyan); color: #04121a; font-weight: 600; }
.lang-switch button:not(.active):hover { color: var(--ink); }

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  position: relative; text-align: center; padding: 120px 24px 80px;
}
#particles { position: absolute; inset: 0; z-index: 0; }
.hero-inner { position: relative; z-index: 1; max-width: 980px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px; color: var(--cyan);
  border: 1px solid rgba(0,229,255,.28); border-radius: 999px; padding: 8px 18px;
  background: rgba(0,229,255,.06); margin-bottom: 34px;
}
.pulse-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(0,229,255,.6); animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0,229,255,.55); }
  70% { box-shadow: 0 0 0 10px rgba(0,229,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,229,255,0); }
}
.hero-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.4rem, 6.2vw, 4.6rem); line-height: 1.14; letter-spacing: .01em;
}
.hero-title .line { display: block; }
.grad {
  background: linear-gradient(92deg, var(--cyan) 5%, var(--blue) 45%, var(--hot) 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 26px rgba(0,229,255,.22));
}
.hero-sub {
  color: var(--muted); font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 640px; margin: 26px auto 0;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }
.btn {
  font-family: var(--font-display); font-weight: 600; font-size: .92rem; letter-spacing: .05em;
  padding: 14px 34px; border-radius: 12px; transition: transform .25s, box-shadow .25s, background .25s;
  display: inline-block;
}
.btn-primary {
  background: linear-gradient(120deg, var(--cyan), var(--blue));
  color: #051019; box-shadow: 0 0 28px rgba(0,229,255,.3);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 6px 42px rgba(0,229,255,.45); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: rgba(255,255,255,.03); }
.btn-ghost:hover { border-color: rgba(0,229,255,.5); transform: translateY(-3px); }
.hero-stats {
  display: flex; justify-content: center; gap: clamp(28px, 6vw, 80px);
  margin-top: 72px; flex-wrap: wrap;
}
.stat b {
  display: block; font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem); color: var(--ink);
}
.stat b::after { content: '+'; color: var(--cyan); margin-left: 2px; }
.stat span { color: var(--muted); font-size: .82rem; letter-spacing: .08em; }
.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  color: var(--muted); animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,8px); } }

/* ---------- 通用区块 ---------- */
.section { max-width: var(--max); margin: 0 auto; padding: 110px 24px; }
.section-head { margin-bottom: 56px; }
.kicker { color: var(--cyan); margin-bottom: 14px; }
.section-head h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.8rem, 3.6vw, 2.7rem); line-height: 1.2;
}
.section-sub { color: var(--muted); max-width: 620px; margin-top: 14px; }

/* ---------- 筛选 ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.filter-bar button {
  border: 1px solid var(--line); background: rgba(255,255,255,.03); color: var(--muted);
  border-radius: 999px; padding: 8px 20px; cursor: pointer;
  font-family: var(--font-body); font-size: .85rem; transition: all .25s;
}
.filter-bar button:hover { color: var(--ink); border-color: rgba(0,229,255,.4); }
.filter-bar button.active { background: rgba(0,229,255,.12); color: var(--cyan); border-color: rgba(0,229,255,.5); }

/* ---------- 矩阵卡片 ---------- */
.matrix-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 22px;
}
.card {
  --accent: var(--cyan);
  position: relative; border-radius: var(--radius); padding: 28px;
  background: linear-gradient(160deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
  transition: transform .35s cubic-bezier(.2,.8,.25,1), border-color .35s, box-shadow .35s;
  cursor: pointer; overflow: hidden;
  display: flex; flex-direction: column; gap: 14px;
}
.card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%);
  opacity: 0; transition: opacity .35s;
}
.card:hover { transform: translateY(-7px); border-color: color-mix(in srgb, var(--accent) 55%, transparent); box-shadow: 0 18px 48px -18px color-mix(in srgb, var(--accent) 45%, transparent); }
.card:hover::before { opacity: 1; }
.card-top { display: flex; align-items: center; justify-content: space-between; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent);
}
.card-icon svg { width: 26px; height: 26px; }
.card-num { font-family: var(--font-mono); font-size: .75rem; color: var(--muted); letter-spacing: .15em; }
.card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.25rem; }
.card .cat { font-size: .72rem; font-family: var(--font-mono); letter-spacing: .14em; color: var(--accent); text-transform: uppercase; }
.card p { color: var(--muted); font-size: .9rem; flex: 1; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .05em;
  padding: 4px 10px; border-radius: 6px; color: var(--muted);
  border: 1px solid var(--line); background: rgba(255,255,255,.03);
}
.card-link { font-family: var(--font-mono); font-size: .75rem; color: var(--accent); letter-spacing: .1em; }
.card.hidden { display: none; }

/* ---------- 产品详情 ---------- */
.feature-block {
  --accent: var(--cyan);
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(30px, 5vw, 72px);
  align-items: center; padding: 72px 0; border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}
.feature-block:last-child { border-bottom: 1px solid var(--line); }
.feature-block.flip .fb-info { order: 2; }
.feature-block.flip .fb-visual { order: 1; }
.fb-num {
  font-family: var(--font-display); font-weight: 700; font-size: 4rem; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px color-mix(in srgb, var(--accent) 55%, transparent);
}
.fb-cat { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .18em; color: var(--accent); text-transform: uppercase; margin: 18px 0 8px; }
.fb-info h3 { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 10px; }
.fb-tagline { color: var(--muted); margin-bottom: 26px; }
.fb-features { list-style: none; display: grid; gap: 12px; }
.fb-features li { display: flex; gap: 12px; align-items: flex-start; font-size: .93rem; color: #c6cfe6; }
.fb-features li::before {
  content: '▸'; color: var(--accent); flex-shrink: 0; margin-top: 1px;
}
.fb-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.fb-meta .tag.acc { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: color-mix(in srgb, var(--accent) 8%, transparent); }

/* 详情视觉：终端窗口风 */
.fb-visual { position: relative; }
.term {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  background: linear-gradient(165deg, rgba(255,255,255,.055), rgba(255,255,255,.012));
  backdrop-filter: blur(16px);
  box-shadow: 0 30px 70px -30px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform .5s cubic-bezier(.2,.8,.25,1);
}
.feature-block:hover .term { transform: translateY(-6px) rotate3d(1, -1, 0, 2deg); }
.term-bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 16px;
  border-bottom: 1px solid var(--line); background: rgba(0,0,0,.25);
}
.term-bar i { width: 10px; height: 10px; border-radius: 50%; display: block; }
.term-bar i:nth-child(1) { background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: auto; font-family: var(--font-mono); font-size: .68rem; color: var(--muted); letter-spacing: .1em; }
.term-body { padding: 26px; min-height: 240px; display: flex; flex-direction: column; gap: 16px; }
.term-icon-row { display: flex; align-items: center; gap: 16px; }
.term-icon {
  width: 64px; height: 64px; border-radius: 16px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent); box-shadow: 0 0 30px color-mix(in srgb, var(--accent) 25%, transparent);
}
.term-icon svg { width: 32px; height: 32px; }
.term-title { font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; }
.term-sub { font-family: var(--font-mono); font-size: .7rem; color: var(--muted); letter-spacing: .1em; }
.term-lines { display: grid; gap: 10px; margin-top: 6px; }
.tline { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: .74rem; color: var(--muted); }
.tline b { color: var(--accent); font-weight: 500; }
.tbar { height: 6px; border-radius: 3px; background: rgba(255,255,255,.07); flex: 1; overflow: hidden; position: relative; }
.tbar::after {
  content: ''; position: absolute; inset: 0; width: var(--w, 60%);
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 80%, transparent), var(--accent));
  border-radius: inherit; transform-origin: left; animation: grow 1.4s cubic-bezier(.2,.8,.25,1) both;
}
.in-view .tbar::after { animation-play-state: running; }
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ---------- 技术栈 ---------- */
.stack-marquee { overflow: hidden; margin-bottom: 48px; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 14px; width: max-content; animation: scroll 32s linear infinite; }
.stack-marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes scroll { to { transform: translateX(-50%); } }
.chip {
  font-family: var(--font-mono); font-size: .8rem; white-space: nowrap;
  padding: 10px 22px; border-radius: 999px; color: #b9c4e0;
  border: 1px solid var(--line); background: rgba(255,255,255,.035);
}
.chip b { color: var(--cyan); font-weight: 500; }
.stack-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.stack-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
  background: linear-gradient(160deg, rgba(255,255,255,.045), rgba(255,255,255,.012));
  transition: border-color .3s, transform .3s;
}
.stack-card:hover { border-color: rgba(0,229,255,.4); transform: translateY(-4px); }
.stack-card h4 { font-family: var(--font-display); font-size: 1rem; margin-bottom: 8px; color: var(--cyan); }
.stack-card p { color: var(--muted); font-size: .85rem; }

/* ---------- 联系 ---------- */
.contact { padding-bottom: 130px; }
.contact-card {
  text-align: center; border-radius: 26px; padding: clamp(48px, 7vw, 90px) 32px;
  border: 1px solid var(--line); position: relative; overflow: hidden;
  background:
    radial-gradient(600px circle at 50% -10%, rgba(0,229,255,.14), transparent 60%),
    linear-gradient(160deg, rgba(255,255,255,.05), rgba(255,255,255,.01));
}
.contact-card h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 3.4vw, 2.5rem); margin: 14px 0; }
.contact-card p { color: var(--muted); max-width: 520px; margin: 0 auto 34px; }
.qr-row { display: flex; justify-content: center; gap: clamp(20px, 4vw, 48px); flex-wrap: wrap; }
.qr-card {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 20px 26px 18px; border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  transition: transform .3s ease, border-color .3s ease;
}
.qr-card:hover { transform: translateY(-4px); border-color: rgba(0,229,255,.4); }
.qr-card img {
  width: clamp(140px, 18vw, 180px); height: auto; aspect-ratio: 1;
  object-fit: contain; border-radius: 12px; background: #fff; padding: 8px;
}
.qr-card b { font-size: .82rem; letter-spacing: .12em; color: var(--cyan); margin-top: 4px; }
.qr-card span { font-size: .8rem; color: var(--muted); }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); }
.footer-inner {
  max-width: var(--max); margin: 0 auto; padding: 28px 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--muted);
}

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.25,1); }
.reveal.in-view { opacity: 1; transform: none; }
.d1 { transition-delay: .05s; } .d2 { transition-delay: .15s; } .d3 { transition-delay: .3s; }
.d4 { transition-delay: .45s; } .d5 { transition-delay: .6s; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .feature-block { grid-template-columns: 1fr; padding: 56px 0; }
  .feature-block.flip .fb-info { order: 1; }
  .feature-block.flip .fb-visual { order: 2; }
  .fb-num { font-size: 3rem; }
  .section { padding: 80px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}