/* WIN TUNNEL — official site */
:root {
  --bg: #04090d;
  --bg-2: #06121a;
  --bg-3: #081b24;
  --panel: rgba(8, 25, 34, 0.72);
  --panel-solid: #081923;
  --line: rgba(71, 220, 245, 0.14);
  --line-strong: rgba(71, 220, 245, 0.28);
  --cyan: #36e6ff;
  --cyan-bright: #9cf7ff;
  --cyan-deep: #009bb9;
  --green: #45f3a4;
  --amber: #ffbd5c;
  --red: #ff6b6b;
  --text: #e7faff;
  --text-soft: #a3c3ce;
  --muted: #6e8d99;
  --dim: #46636e;
  --font-ui: "Bahnschrift", "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-mono: "Cascadia Code", "Consolas", "SFMono-Regular", monospace;
  --max: 1200px;
  --radius: 3px;
  --ease: cubic-bezier(0.2, 0.75, 0.25, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse 80% 55% at 73% 15%, rgba(0, 180, 220, 0.12), transparent 60%),
    radial-gradient(ellipse 55% 45% at 15% 55%, rgba(0, 130, 160, 0.08), transparent 65%),
    linear-gradient(180deg, #04090d 0%, #050e14 45%, #04090d 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(57, 213, 238, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 213, 238, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}
::selection { background: var(--cyan); color: #001014; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }
button { color: inherit; }
code { font-family: var(--font-mono); font-size: 0.92em; color: var(--cyan-bright); }
.svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.container { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  background: rgba(4, 9, 13, 0.4);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.site-header.is-scrolled { background: rgba(4, 9, 13, 0.86); border-color: var(--line); }
.nav-wrap { height: 76px; display: flex; align-items: center; gap: 34px; }
.brand { display: flex; align-items: center; gap: 11px; min-width: max-content; }
.brand-logo { filter: drop-shadow(0 0 12px rgba(54, 230, 255, 0.35)); }
.brand-text { font-family: var(--font-mono); font-size: 16px; letter-spacing: 0.12em; font-weight: 600; white-space: nowrap; }
.brand-text b { color: var(--cyan); font-weight: 600; }
.brand-sub {
  font-family: var(--font-mono);
  font-size: 7px;
  line-height: 1.3;
  letter-spacing: 0.2em;
  color: var(--dim);
  border-left: 1px solid var(--line-strong);
  padding-left: 11px;
  margin-left: 2px;
  max-width: 76px;
}
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav a {
  font-size: 13px;
  color: var(--text-soft);
  position: relative;
  padding: 7px 0;
  transition: color 0.2s ease;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--cyan);
  transition: right 0.25s var(--ease);
}
.main-nav a:hover, .main-nav a.is-active { color: var(--text); }
.main-nav a:hover::after, .main-nav a.is-active::after { right: 0; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.version-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 5px 8px;
  letter-spacing: 0.05em;
}
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: transparent; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 1px; background: var(--text-soft); margin: 5px auto; transition: transform 0.25s ease, opacity 0.2s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- buttons ---------- */
.btn {
  --btn-bg: transparent;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--line-strong);
  background: var(--btn-bg);
  color: var(--text);
  padding: 13px 22px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn-primary { background: var(--cyan); border-color: var(--cyan); color: #001318; box-shadow: 0 0 0 rgba(54, 230, 255, 0); }
.btn-primary:hover { background: var(--cyan-bright); border-color: var(--cyan-bright); box-shadow: 0 0 34px rgba(54, 230, 255, 0.24); transform: translateY(-1px); }
.btn-ghost { background: rgba(7, 20, 27, 0.55); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan-bright); background: rgba(10, 37, 47, 0.75); }
.btn-small { padding: 9px 15px; font-size: 12px; }
.btn-large { padding: 16px 27px; font-size: 14px; }
.btn-wide { width: 100%; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); font-size: 13px; font-weight: 600; margin-top: 18px; }
.text-link svg { width: 16px; height: 16px; transition: transform 0.2s ease; }
.text-link:hover svg { transform: translateX(4px); }

/* ---------- common type ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.live-dot, .status-orb {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulse 2s infinite;
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(44px, 5.2vw, 72px); line-height: 1.04; letter-spacing: -0.045em; margin-bottom: 26px; font-weight: 600; }
h2 { font-size: clamp(34px, 4.5vw, 56px); line-height: 1.1; letter-spacing: -0.04em; margin-bottom: 0; font-weight: 600; }
.gradient-text {
  background: linear-gradient(90deg, #e8ffff 0%, #65efff 38%, #18c9e8 72%, #0a92b2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 24px rgba(54, 230, 255, 0.18));
}
.dim-text { color: var(--text-soft); }
.section { padding: 120px 0; position: relative; }
.section-head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.7fr); gap: 70px; align-items: end; margin-bottom: 56px; }
.section-head.compact { margin-bottom: 46px; }
.section-head .eyebrow { margin-bottom: 22px; }
.section-lead { color: var(--text-soft); font-size: 15px; line-height: 1.8; margin: 0; max-width: 440px; justify-self: end; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 90px 0 0; overflow: hidden; }
.hero-grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(54, 230, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(54, 230, 255, 0.055) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 75% 65% at 65% 40%, #000 0%, transparent 74%);
  opacity: 0.65;
}
.hero-glow {
  position: absolute;
  width: 760px; height: 760px;
  right: -180px; top: -310px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 197, 230, 0.16), transparent 66%);
  filter: blur(8px);
  pointer-events: none;
}
.hero-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(440px, 0.92fr); gap: 50px; align-items: center; min-height: 590px; position: relative; }
.hero-copy { padding-top: 24px; }
.hero-copy .eyebrow { margin-bottom: 28px; }
.hero-lead { font-size: 16px; line-height: 1.85; color: var(--text-soft); max-width: 550px; margin-bottom: 32px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 13px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 27px; color: var(--muted); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.02em; }
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta svg { width: 13px; height: 13px; color: var(--green); }
.hero-visual { position: relative; padding: 26px 0 20px; }
.stage-rings { position: absolute; inset: -90px -60px -60px; pointer-events: none; }
.ring { position: absolute; left: 50%; top: 50%; border: 1px solid rgba(54, 230, 255, 0.1); border-radius: 50%; transform: translate(-50%, -50%); }
.ring-1 { width: 640px; height: 640px; border-style: dashed; animation: spin 80s linear infinite; }
.ring-2 { width: 510px; height: 510px; border-color: rgba(54, 230, 255, 0.14); }
.ring-3 { width: 380px; height: 380px; border-color: rgba(54, 230, 255, 0.07); }
.stage-core { position: absolute; left: 50%; top: 50%; width: 4px; height: 4px; background: var(--cyan); box-shadow: 0 0 24px 5px rgba(54, 230, 255, 0.4); border-radius: 50%; transform: translate(-50%, -50%); }
.app-frame {
  position: relative;
  z-index: 2;
  border: 1px solid rgba(86, 224, 247, 0.35);
  background: #061016;
  box-shadow: 0 35px 100px rgba(0, 0, 0, 0.55), 0 0 60px rgba(0, 170, 205, 0.1);
  transform: perspective(1200px) rotateY(-3deg) rotateX(1deg);
  animation: frame-in 1s var(--ease) both;
}
.app-frame::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px;
  width: 44px; height: 1px; background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}
.app-frame-bar { height: 34px; display: flex; align-items: center; border-bottom: 1px solid var(--line); padding: 0 12px; gap: 12px; background: rgba(5, 17, 23, 0.94); }
.window-dots { display: flex; gap: 4px; }
.window-dots i { width: 5px; height: 5px; border-radius: 50%; background: #1f3d47; }
.window-dots i:first-child { background: rgba(255, 107, 107, 0.6); }
.window-dots i:nth-child(2) { background: rgba(255, 189, 92, 0.55); }
.window-dots i:nth-child(3) { background: rgba(69, 243, 164, 0.55); }
.frame-title { font-family: var(--font-mono); font-size: 8px; color: var(--dim); letter-spacing: 0.12em; }
.frame-live { margin-left: auto; display: inline-flex; align-items: center; gap: 5px; font-family: var(--font-mono); font-size: 8px; color: var(--green); }
.frame-live i { width: 4px; height: 4px; border-radius: 50%; background: currentColor; box-shadow: 0 0 6px currentColor; }
.app-shot { position: relative; overflow: hidden; aspect-ratio: 1120 / 740; }
.app-shot img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.92) contrast(1.04); }
.scanline { position: absolute; left: 0; right: 0; top: -20%; height: 28%; background: linear-gradient(to bottom, transparent, rgba(54, 230, 255, 0.075), transparent); animation: scan 7s linear infinite; pointer-events: none; }
.float-card {
  position: absolute;
  z-index: 3;
  border: 1px solid var(--line-strong);
  background: rgba(6, 20, 27, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 11px 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.36);
}
.float-label { display: block; font-family: var(--font-mono); font-size: 7px; color: var(--dim); letter-spacing: 0.16em; margin-bottom: 3px; }
.float-card b { display: block; font-size: 11px; font-weight: 600; color: var(--text); }
.float-card code { display: block; margin-top: 3px; color: var(--cyan); font-size: 10px; }
.float-card-a { right: -22px; top: 18%; animation: float 6s ease-in-out infinite; }
.float-card-b { left: -26px; bottom: 13%; display: flex; align-items: center; gap: 9px; animation: float 7s ease-in-out infinite reverse; }
.float-card-b .status-orb { width: 7px; height: 7px; flex: none; }
.float-card-b .float-label { margin: 0; }
.float-badge { margin-left: 8px; font-family: var(--font-mono); font-size: 8px; color: var(--cyan); border: 1px solid var(--line); padding: 2px 4px; }
.hero-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.hero-strip div { display: flex; align-items: center; gap: 15px; padding: 17px 0; border-right: 1px solid var(--line); }
.hero-strip div:last-child { border-right: 0; }
.hero-strip b { font-family: var(--font-mono); font-size: 10px; color: var(--cyan); font-weight: 500; }
.hero-strip span { font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }

/* ---------- features ---------- */
.features { border-top: 1px solid rgba(54, 230, 255, 0.06); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.feature-card {
  position: relative;
  background: #061018;
  padding: 26px 23px 25px;
  min-height: 280px;
  overflow: hidden;
  transition: background 0.3s ease;
}
.feature-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(54, 230, 255, 0.075), transparent 55%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.feature-card:hover { background: #071720; }
.feature-card:hover::after { opacity: 1; }
.feature-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 22px; }
.feature-icon { width: 38px; height: 38px; border: 1px solid var(--line-strong); display: grid; place-items: center; color: var(--cyan); background: rgba(54, 230, 255, 0.035); }
.feature-icon svg { width: 21px; height: 21px; }
.feature-index { font-family: var(--font-mono); font-size: 9px; color: var(--dim); }
.feature-card h3 { font-size: 17px; margin-bottom: 10px; font-weight: 600; letter-spacing: -0.01em; }
.feature-card p { font-size: 12px; line-height: 1.8; color: var(--muted); margin-bottom: 20px; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 5px; position: absolute; left: 23px; bottom: 22px; }
.feature-tags span { font-family: var(--font-mono); font-size: 8px; color: var(--dim); border: 1px solid rgba(54, 230, 255, 0.12); padding: 3px 5px; }

/* ---------- scenarios ---------- */
.scenarios { background: linear-gradient(180deg, transparent, rgba(0, 128, 156, 0.035)); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.scenario-card {
  position: relative;
  display: flex; gap: 15px;
  border: 1px solid var(--line);
  background: rgba(5, 15, 21, 0.55);
  padding: 22px 18px;
  min-height: 150px;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}
.scenario-card:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.scenario-card > span { color: var(--cyan); flex: none; }
.scenario-card svg { width: 22px; height: 22px; }
.scenario-card h3 { font-size: 14px; margin-bottom: 5px; font-weight: 600; }
.scenario-card p { font-size: 11px; line-height: 1.7; color: var(--muted); margin: 0; }
.scenario-card em { position: absolute; right: 10px; bottom: -13px; font-family: var(--font-mono); font-size: 44px; color: rgba(54, 230, 255, 0.035); font-style: normal; }
.flow-panel {
  margin-top: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(7, 22, 30, 0.95), rgba(4, 13, 18, 0.85));
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 40px;
  align-items: center;
  padding: 34px 32px;
}
.flow-copy h3 { font-size: 22px; margin: 12px 0 8px; font-weight: 600; }
.flow-copy p { font-size: 12px; color: var(--muted); line-height: 1.8; margin: 0; max-width: 360px; }
.flow-diagram { display: flex; align-items: center; justify-content: flex-end; gap: 13px; }
.flow-node { border: 1px solid var(--line); padding: 12px 14px; min-width: 100px; background: rgba(4, 13, 18, 0.6); }
.flow-node.accent { border-color: rgba(54, 230, 255, 0.4); background: rgba(54, 230, 255, 0.05); }
.flow-node span { display: block; font-family: var(--font-mono); font-size: 7px; color: var(--dim); letter-spacing: 0.15em; }
.flow-node b { display: block; font-family: var(--font-mono); font-size: 9px; color: var(--text); margin: 5px 0 3px; font-weight: 500; }
.flow-node.accent b { color: var(--cyan); }
.flow-node small { display: block; font-size: 9px; color: var(--muted); }
.flow-arrow { position: relative; width: 38px; height: 1px; background: var(--line-strong); flex: none; }
.flow-arrow i { position: absolute; left: 0; top: -2px; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); animation: travel 2.4s linear infinite; }
.flow-arrow svg { position: absolute; right: -3px; top: -6px; width: 12px; height: 12px; color: var(--cyan); }

/* ---------- steps ---------- */
.workflow { background: var(--bg-2); border-top: 1px solid rgba(54, 230, 255, 0.06); border-bottom: 1px solid rgba(54, 230, 255, 0.06); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.step { position: relative; padding: 30px 24px 0 0; min-height: 220px; }
.step-no { font-family: var(--font-mono); font-size: 11px; color: var(--cyan); }
.step-line { position: absolute; left: 0; top: 9px; width: 100%; height: 1px; background: var(--line); }
.step-line::after { content: ""; position: absolute; left: 0; top: -2px; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan); }
.step h3 { margin: 39px 0 9px; font-size: 16px; font-weight: 600; }
.step p { color: var(--muted); font-size: 12px; line-height: 1.8; margin: 0; max-width: 240px; }
.step p code { color: var(--cyan); font-size: 10px; }

/* ---------- screens ---------- */
.screen-shell { border: 1px solid var(--line); background: #061016; padding: 0; }
.screen-tabs { display: flex; border-bottom: 1px solid var(--line); padding: 0 18px; gap: 8px; }
.screen-tab {
  border: 0; background: transparent; color: var(--muted); font-family: var(--font-mono); font-size: 10px;
  padding: 15px 11px 13px; cursor: pointer; position: relative; letter-spacing: 0.04em;
}
.screen-tab::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: transparent; }
.screen-tab.is-active { color: var(--cyan); }
.screen-tab.is-active::after { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.screen-stage { position: relative; background: #02070a; }
.screen-bar { height: 28px; display: flex; align-items: center; gap: 10px; padding: 0 12px; color: var(--dim); font-family: var(--font-mono); font-size: 8px; border-bottom: 1px solid rgba(54, 230, 255, 0.08); }
.screen-bar .window-dots { margin-right: 4px; }
.screen-hint { margin-left: auto; color: var(--green); }
#shot-image { width: 100%; height: auto; transition: opacity 0.2s ease; }
#shot-image.is-switching { opacity: 0.25; }
.screen-caption { margin: 0; border-top: 1px solid var(--line); padding: 13px 17px; color: var(--muted); font-size: 11px; }

/* ---------- download ---------- */
.download { background: linear-gradient(180deg, rgba(0, 115, 140, 0.055), transparent 65%); }
.download-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr); gap: 18px; align-items: start; }
.download-primary { position: relative; border: 1px solid rgba(54, 230, 255, 0.3); background: linear-gradient(135deg, rgba(9, 34, 43, 0.94), rgba(5, 15, 21, 0.9)); padding: 30px; overflow: hidden; }
.download-primary::before { content: ""; position: absolute; left: -1px; top: -1px; width: 70px; height: 1px; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.download-head { display: flex; align-items: center; gap: 15px; margin-bottom: 15px; }
.os-mark { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line-strong); color: var(--cyan); font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.1em; background: rgba(54, 230, 255, 0.05); }
.download-head h3 { margin: 4px 0 0; font-family: var(--font-mono); font-size: 17px; letter-spacing: 0.04em; font-weight: 500; }
.download-version { margin-left: auto; align-self: flex-start; font-family: var(--font-mono); font-size: 9px; color: var(--green); border: 1px solid rgba(69, 243, 164, 0.25); padding: 3px 6px; }
.download-primary > p { color: var(--text-soft); font-size: 13px; line-height: 1.8; max-width: 520px; margin-bottom: 21px; }
.download-meta { display: flex; flex-wrap: wrap; gap: 10px 24px; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 21px; }
.download-meta span { font-size: 10px; color: var(--muted); }
.download-meta b { color: var(--text-soft); font-family: var(--font-mono); font-weight: 500; }
.download-actions { display: flex; }
.download-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 13px; color: var(--dim); font-size: 10px; }
.download-foot span { display: inline-flex; align-items: center; gap: 6px; }
.download-foot svg { width: 13px; height: 13px; color: var(--green); }
.download-foot a { color: var(--cyan); border-bottom: 1px solid rgba(54, 230, 255, 0.25); }
.download-side { border: 1px solid var(--line); background: rgba(5, 15, 21, 0.55); }
.side-card { padding: 23px; }
.side-card h3 { font-size: 15px; margin: 9px 0 13px; font-weight: 600; }
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li { display: flex; gap: 8px; align-items: flex-start; color: var(--muted); font-size: 11px; line-height: 1.65; padding: 6px 0; border-bottom: 1px solid rgba(54, 230, 255, 0.07); }
.check-list li:last-child { border-bottom: 0; }
.check-list svg { width: 13px; height: 13px; color: var(--green); flex: none; margin-top: 2px; }
.side-note { margin: 15px 0 0; padding-top: 13px; border-top: 1px solid rgba(54, 230, 255, 0.07); color: var(--muted); font-size: 10px; line-height: 1.7; }
.admin-download { border-top: 1px solid var(--line); }
.admin-download summary { list-style: none; cursor: pointer; padding: 16px 23px; display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--text-soft); }
.admin-download summary::-webkit-details-marker { display: none; }
.admin-download .plus { color: var(--cyan); font-family: var(--font-mono); font-size: 14px; }
.admin-download[open] .plus { transform: rotate(45deg); }
.admin-download p { margin: 0 23px 12px; font-size: 10px; color: var(--muted); line-height: 1.7; }
.admin-links { padding: 0 23px 19px; display: grid; gap: 5px; }
.admin-links a { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 9px; padding: 7px 9px; border: 1px solid var(--line); color: var(--text-soft); }
.admin-links a:hover { border-color: var(--line-strong); color: var(--cyan); }
.admin-links span { color: var(--dim); }

/* ---------- specs ---------- */
.specs { border-top: 1px solid rgba(54, 230, 255, 0.06); }
.spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.spec-item { padding: 23px 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(5, 15, 21, 0.35); }
.spec-item span { font-family: var(--font-mono); font-size: 8px; color: var(--dim); letter-spacing: 0.14em; }
.spec-item b { display: block; font-size: 15px; margin: 8px 0 4px; font-weight: 600; }
.spec-item p { margin: 0; font-size: 10px; color: var(--muted); }

/* ---------- faq ---------- */
.faq { background: var(--bg-2); border-top: 1px solid rgba(54, 230, 255, 0.06); }
.faq-layout { display: grid; grid-template-columns: 0.82fr 1.25fr; gap: 80px; }
.faq-intro .eyebrow { margin-bottom: 22px; }
.faq-intro .section-lead { justify-self: start; margin-top: 20px; max-width: 330px; }
.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 18px 0; cursor: pointer; font-size: 13px; color: var(--text-soft); transition: color 0.2s; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--text); }
.faq-item .plus { font-family: var(--font-mono); color: var(--cyan); font-size: 17px; line-height: 1; transition: transform 0.2s var(--ease); }
.faq-item[open] summary { color: var(--text); }
.faq-item[open] .plus { transform: rotate(45deg); }
.faq-item p { margin: -3px 0 19px; padding-right: 30px; color: var(--muted); font-size: 12px; line-height: 1.85; }

/* ---------- final ---------- */
.final-cta { padding: 110px 0; position: relative; overflow: hidden; border-top: 1px solid rgba(54, 230, 255, 0.08); background: radial-gradient(ellipse 55% 80% at 50% 50%, rgba(0, 161, 193, 0.13), transparent 68%); }
.final-cta::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(54, 230, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(54, 230, 255, 0.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse 60% 80% at 50% 50%, #000, transparent 75%); pointer-events: none; }
.final-cta-inner { position: relative; text-align: center; }
.final-cta .eyebrow { justify-content: center; margin-bottom: 24px; }
.final-cta h2 { font-size: clamp(38px, 5.4vw, 68px); margin-bottom: 30px; }
.final-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 44px 0 22px; background: #03070a; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 0.8fr; gap: 30px; padding-bottom: 34px; }
.footer-brand .brand { margin-bottom: 15px; }
.footer-brand p { color: var(--muted); font-size: 11px; line-height: 1.8; margin: 0; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col > span { font-family: var(--font-mono); font-size: 8px; color: var(--dim); letter-spacing: 0.16em; margin-bottom: 4px; }
.footer-col a, .footer-col b { font-size: 11px; color: var(--muted); font-weight: 400; }
.footer-col a:hover { color: var(--cyan); }
.footer-col b { color: var(--green); font-family: var(--font-mono); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 16px; display: flex; justify-content: space-between; gap: 20px; color: var(--dim); font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.04em; }
.footer-signal { display: inline-flex; align-items: center; gap: 6px; }
.footer-signal i { width: 4px; height: 4px; border-radius: 50%; background: var(--green); box-shadow: 0 0 7px var(--green); }

/* ---------- effects ---------- */
.page-noise {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.7'/%3E%3C/svg%3E");
}
.reveal { opacity: 1; transform: none; }
.reveal.is-visible { opacity: 1; transform: none; }
.hero .reveal { opacity: 1; transform: none; animation: hero-rise 0.9s var(--ease) both; }
.hero-copy .eyebrow { animation-delay: 0.05s; }
.hero-copy h1 { animation-delay: 0.12s; }
.hero-copy .hero-lead { animation-delay: 0.2s; }
.hero-copy .hero-ctas { animation-delay: 0.28s; }
.hero-copy .hero-meta { animation-delay: 0.36s; }
.hero-visual { animation-delay: 0.24s; }
@keyframes hero-rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes scan { 0% { top: -30%; } 100% { top: 115%; } }
@keyframes travel { 0% { left: 0; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { left: 100%; opacity: 0; } }
@keyframes frame-in { from { opacity: 0; transform: perspective(1200px) rotateY(-7deg) translateY(14px); } to { opacity: 1; transform: perspective(1200px) rotateY(-3deg) rotateX(1deg) translateY(0); } }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .hero-layout { grid-template-columns: 1fr 1fr; gap: 30px; }
  .float-card-a { right: -5px; }
  .float-card-b { left: -5px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card { min-height: 240px; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-panel { grid-template-columns: 1fr; gap: 24px; }
  .flow-diagram { justify-content: flex-start; }
  .section-head { gap: 38px; }
}
@media (max-width: 860px) {
  .nav-wrap { height: 66px; }
  .brand-sub { display: none; }
  .main-nav {
    position: absolute; left: 0; right: 0; top: 66px;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(4, 10, 14, 0.98); border-bottom: 1px solid var(--line); padding: 8px 24px 18px;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 13px 0; border-bottom: 1px solid rgba(54, 230, 255, 0.07); }
  .main-nav a::after { display: none; }
  .nav-toggle { display: block; margin-left: auto; order: 2; }
  .nav-actions { order: 3; margin-left: 0; }
  .nav-actions .version-pill { display: none; }
  .nav-actions .btn { padding: 8px 11px; font-size: 10px; }
  .hero { padding-top: 58px; }
  .hero-layout { grid-template-columns: 1fr; min-height: 0; gap: 44px; }
  .hero-copy { padding-top: 0; }
  .hero-visual { max-width: 660px; margin: 0 auto; width: 100%; }
  .hero-strip { grid-template-columns: repeat(2, 1fr); }
  .hero-strip div:nth-child(2) { border-right: 0; }
  .hero-strip div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 86px 0; }
  .section-head { grid-template-columns: 1fr; gap: 22px; align-items: start; margin-bottom: 38px; }
  .section-lead { justify-self: start; max-width: 560px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step { padding-right: 22px; }
  .step-line { display: none; }
  .step h3 { margin-top: 24px; }
  .download-layout { grid-template-columns: 1fr; }
  .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}
@media (max-width: 620px) {
  .container { width: min(calc(100% - 32px), var(--max)); }
  h1 { font-size: clamp(42px, 12vw, 62px); }
  h2 { font-size: clamp(31px, 8.5vw, 44px); }
  .nav-wrap { gap: 10px; }
  .brand-text { font-size: 14px; }
  .nav-actions .btn { padding: 7px 9px; font-size: 9px; }
  .hero { padding-top: 44px; }
  .hero-lead { font-size: 14px; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }
  .hero-meta { gap: 10px 16px; font-size: 9px; }
  .hero-strip { margin-top: 38px; }
  .hero-strip div { padding: 12px 0; gap: 9px; }
  .hero-strip span { font-size: 9px; }
  .float-card-a { right: 6px; top: 10%; transform: scale(0.9); transform-origin: right top; }
  .float-card-b { left: 6px; bottom: 5%; transform: scale(0.9); transform-origin: left bottom; }
  .app-frame { transform: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 230px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .flow-panel { padding: 24px 20px; }
  .flow-diagram { flex-direction: column; align-items: stretch; }
  .flow-node { width: 100%; }
  .flow-arrow { width: 1px; height: 24px; margin-left: 20px; }
  .flow-arrow svg { right: auto; left: -5px; top: auto; bottom: -3px; transform: rotate(90deg); }
  .flow-arrow i { display: none; }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: 0; padding: 22px 0; border-bottom: 1px solid var(--line); }
  .step h3 { margin-top: 9px; }
  .step p { max-width: none; }
  .screen-tabs { padding: 0 8px; gap: 0; }
  .screen-tab { padding: 13px 8px 11px; font-size: 9px; }
  .download-primary { padding: 22px 18px; }
  .download-head h3 { font-size: 14px; }
  .download-version { font-size: 8px; }
  .download-meta { gap: 8px 16px; }
  .download-foot { align-items: flex-start; flex-direction: column; }
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .spec-item { padding: 18px 14px; }
  .spec-item b { font-size: 12px; }
  .faq-item summary { font-size: 12px; }
  .final-cta { padding: 75px 0; }
  .final-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}
@media (max-width: 380px) {
  .nav-actions .btn { display: none; }
  h1 { font-size: 38px; }
  .brand-text { font-size: 13px; }
  .hero-meta { gap: 8px 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- website language switch (client globe style) ---------- */
.wt-lang {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 4px;
}
.wt-globe {
  appearance: none;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(54, 230, 255, 0.22);
  background: #050c12;
  color: #7fa6b2;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.wt-globe svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.25;
  stroke-linecap: round;
}
.wt-globe:hover,
.wt-lang.is-open .wt-globe {
  color: #4ce8ff;
  border-color: rgba(54, 230, 255, 0.65);
  background: #071720;
}
.wt-lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 90;
  min-width: 142px;
  padding: 5px;
  border: 1px solid rgba(54, 230, 255, 0.28);
  background: #07151e;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
}
.wt-lang.is-open .wt-lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.wt-lang-menu button {
  appearance: none;
  width: 100%;
  border: 0;
  background: transparent;
  color: #b9d5dc;
  font-family: var(--font-sans);
  font-size: 11px;
  text-align: left;
  padding: 8px 9px;
  cursor: pointer;
}
.wt-lang-menu button:hover {
  color: #4ce8ff;
  background: rgba(54, 230, 255, 0.08);
}
.wt-lang-menu button.is-active { color: #4ce8ff; }
@media (max-width: 640px) {
  .wt-lang { margin-left: 2px; }
  .wt-globe { width: 32px; height: 32px; }
}

/* ---------- card registration modal ---------- */
.wt-register-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(1, 7, 11, 0.78);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.wt-register-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.wt-register-dialog {
  position: relative;
  width: min(470px, 94vw);
  height: min(700px, 90vh);
  border: 1px solid rgba(54, 230, 255, 0.3);
  background: #040d14;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  transform: translateY(8px) scale(0.985);
  transition: transform 0.2s ease;
}
.wt-register-overlay.is-open .wt-register-dialog {
  transform: translateY(0) scale(1);
}
.wt-register-dialog iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #040d14;
}
.wt-register-close {
  position: absolute;
  z-index: 2;
  top: 10px;
  right: 10px;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(54, 230, 255, 0.18);
  background: #06131c;
  color: #b9d5dc;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.wt-register-close:hover { color: #ff5d6c; border-color: rgba(255, 93, 108, 0.5); }

html.portal-embed body { background: #040d14; }
html.portal-embed .portal-top,
html.portal-embed .portal-aside,
html.portal-embed .portal-footer,
html.portal-embed .wt-lang { display: none !important; }
html.portal-embed .portal-layout {
  display: block;
  padding: 18px 16px;
  min-height: 0;
}
html.portal-embed .auth-card {
  width: 100%;
  max-width: none;
  margin: 0;
  border: 0;
  box-shadow: none;
  background: transparent;
}
html.portal-embed .auth-head { padding-top: 8px; }