/* ==========================================================================
   SecureUxTheme Official Website - Style Sheet
   Design: Flat / Modern / Professional
   Color: Tech dark space + palette gradient (purple → cyan)
   ========================================================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand colors */
  --c-bg:           #0B1020;
  --c-bg-2:         #0F1530;
  --c-card:         #141B2D;
  --c-card-2:       #1A2240;
  --c-border:       #232B48;
  --c-border-soft:  rgba(255,255,255,0.06);

  --c-text:         #F5F7FA;
  --c-text-2:       #C3CCDE;
  --c-text-3:       #8E9AB5;
  --c-text-mute:    #6B7494;

  --c-primary:      #6C5CE7;   /* violet */
  --c-accent:       #00D4FF;   /* cyan */
  --c-success:      #00E5A0;   /* mint green - security */
  --c-warning:      #FFB546;
  --c-danger:       #FF6B6B;

  --grad-primary:   linear-gradient(135deg, #6C5CE7 0%, #00D4FF 100%);
  --grad-success:   linear-gradient(135deg, #00E5A0 0%, #00D4FF 100%);
  --grad-hero:      radial-gradient(circle at 20% 20%, rgba(108,92,231,0.25), transparent 50%),
                    radial-gradient(circle at 80% 30%, rgba(0,212,255,0.18), transparent 50%),
                    radial-gradient(circle at 50% 100%, rgba(0,229,160,0.12), transparent 60%);

  /* Typography */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Spacing & sizing */
  --container:    1200px;
  --container-narrow: 960px;
  --radius-sm:    8px;
  --radius:       14px;
  --radius-lg:    22px;
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.25);
  --shadow:       0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow:  0 8px 40px rgba(108,92,231,0.25);

  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --transition:   0.25s var(--ease);
}
button { outline: none } 
/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-accent); }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
ul, ol { list-style: none; }
code, pre { font-family: var(--font-mono); }

::selection { background: var(--c-primary); color: #fff; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 100px 0; position: relative; }
.section-sm { padding: 64px 0; }
.section-title {
  text-align: center;
  margin-bottom: 16px;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.section-title .grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-subtitle {
  text-align: center;
  color: var(--c-text-3);
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 12px;
}
.text-grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.text-success { color: var(--c-success); }
.text-warning { color: var(--c-warning); }
.text-danger  { color: var(--c-danger); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1;
}
.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 6px 24px rgba(108,92,231,0.45);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(108,92,231,0.6);
  color: #fff;
}
.btn-ghost {
  background: rgba(255,255,255,0.04);
  border-color: var(--c-border);
  color: var(--c-text);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-2px);
}
.btn-success {
  background: var(--grad-success);
  color: #06231A;
  font-weight: 700;
  box-shadow: 0 6px 24px rgba(0,229,160,0.35);
}
.btn-success:hover { transform: translateY(-2px); color: #06231A; }
.btn-lg { padding: 18px 36px; font-size: 16px; }
.btn-sm { padding: 9px 16px; font-size: 13px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,16,32,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand img { width: 32px; height: 32px; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand .brand-text small {
  font-size: 10px;
  font-weight: 500;
  color: var(--c-text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-2);
  border-radius: var(--radius-sm);
}
.nav-menu a:hover { color: var(--c-text); background: rgba(255,255,255,0.05); }
.nav-menu a.active { color: var(--c-accent); background: rgba(0,212,255,0.08); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 80px;
  background: var(--grad-hero);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  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: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.25);
  color: var(--c-accent);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--c-success);
  box-shadow: 0 0 12px var(--c-success);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}
.hero h1 {
  font-size: 60px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.hero h1 .grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 19px;
  color: var(--c-text-2);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--c-text-3);
  font-size: 14px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--c-success); }

/* Hero visual */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  margin-left: auto;
}
.hero-card {
  position: absolute;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}
.hero-card-main {
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: linear-gradient(135deg, rgba(108,92,231,0.12), rgba(0,212,255,0.08));
  border-color: rgba(108,92,231,0.35);
  padding: 32px;
}
.hero-card-main .icon-row { display: flex; gap: 12px; }
.hero-card-main .icon-row .icon-box {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
}
.hero-card-main h3 { font-size: 22px; font-weight: 700; }
.hero-card-main .checklist { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.hero-card-main .checklist li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 14px; color: var(--c-text-2);
}
.hero-card-main .checklist svg {
  width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px;
  color: var(--c-success);
}
.hero-card-float {
  width: 220px;
  bottom: -20px; left: -30px;
  font-size: 13px;
}
.hero-card-float .stat-num {
  font-size: 28px;
  font-weight: 800;
  background: var(--grad-success);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.hero-card-float .stat-label { color: var(--c-text-3); font-size: 12px; margin-top: 4px; }
.hero-card-float-2 {
  top: -20px; right: -20px;
  width: 180px;
  font-size: 13px;
}
.hero-card-float-2 .badge-row { display: flex; gap: 6px; flex-wrap: wrap; }
.hero-card-float-2 .badge-row span {
  font-size: 11px;
  padding: 4px 8px;
  background: rgba(0,229,160,0.1);
  color: var(--c-success);
  border: 1px solid rgba(0,229,160,0.3);
  border-radius: 4px;
  font-weight: 600;
}

/* ---------- Stats bar ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 40px 0;
  border-top: 1px solid var(--c-border-soft);
  border-bottom: 1px solid var(--c-border-soft);
  background: var(--c-bg-2);
}
.stat {
  text-align: center;
  border-right: 1px solid var(--c-border-soft);
}
.stat:last-child { border-right: 0; }
.stat .num {
  font-size: 36px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat .label {
  font-size: 13px;
  color: var(--c-text-3);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* ---------- Feature badges (3-up) ---------- */
.feature-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-badge {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-badge::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-primary);
  opacity: 0;
  transition: var(--transition);
}
.feature-badge:hover {
  transform: translateY(-4px);
  border-color: rgba(108,92,231,0.4);
  box-shadow: var(--shadow-glow);
}
.feature-badge:hover::before { opacity: 1; }
.feature-badge .icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  background: rgba(108,92,231,0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin-bottom: 18px;
}
.feature-badge.success .icon { background: rgba(0,229,160,0.12); }
.feature-badge.accent .icon { background: rgba(0,212,255,0.12); }
.feature-badge h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-badge p {
  color: var(--c-text-3);
  font-size: 14.5px;
  line-height: 1.65;
}

/* ---------- Feature grid (6-up) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,212,255,0.35);
}
.feature-card .icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-primary);
  font-size: 22px;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--c-text-3); line-height: 1.65; }

/* ---------- Use cases ---------- */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.usecase-card {
  background: linear-gradient(180deg, var(--c-card) 0%, var(--c-card-2) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.usecase-card:hover {
  transform: translateY(-4px);
  border-color: rgba(108,92,231,0.4);
}
.usecase-card .tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 14px;
  padding: 4px 10px;
  background: rgba(0,212,255,0.08);
  border-radius: 100px;
}
.usecase-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.usecase-card p { color: var(--c-text-3); font-size: 14.5px; line-height: 1.7; }

/* ---------- Testimonials ---------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: var(--transition);
}
.testimonial-card:hover {
  border-color: rgba(0,229,160,0.35);
  transform: translateY(-2px);
}
.testimonial-card .stars { color: #FFD93D; font-size: 14px; letter-spacing: 2px; }
.testimonial-card .quote {
  font-size: 14.5px;
  color: var(--c-text-2);
  line-height: 1.75;
  flex-grow: 1;
}
.testimonial-card .quote::before { content: "\201C "; color: var(--c-primary); font-size: 30px; line-height: 0; margin-right: 4px; vertical-align: -10px; }
.testimonial-card .user {
  display: flex; align-items: center; gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--c-border-soft);
}
.testimonial-card .avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}
.testimonial-card .user-info { font-size: 13px; }
.testimonial-card .user-info strong { display: block; color: var(--c-text); }
.testimonial-card .user-info span { color: var(--c-text-mute); }

/* ---------- Comparison table ---------- */
.comparison-wrap {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.comparison-table thead th {
  background: var(--c-bg-2);
  padding: 18px 20px;
  text-align: left;
  font-weight: 700;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-text);
}
.comparison-table thead th.highlight {
  background: linear-gradient(180deg, rgba(108,92,231,0.18), transparent);
  color: var(--c-accent);
}
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border-soft);
  color: var(--c-text-2);
  vertical-align: middle;
}
.comparison-table tr:last-child td { border-bottom: 0; }
.comparison-table tr:hover td { background: rgba(255,255,255,0.02); }
.comparison-table .tool-name { font-weight: 600; color: var(--c-text); }
.comparison-table .yes { color: var(--c-success); font-weight: 600; }
.comparison-table .no { color: var(--c-danger); font-weight: 600; }
.comparison-table .partial { color: var(--c-warning); font-weight: 600; }
.comparison-table .yes::before { content: "✓ "; }
.comparison-table .no::before { content: "✗ "; }
.comparison-table .partial::before { content: "△ "; }
.comparison-table td.highlight-col {
  background: rgba(108,92,231,0.06);
  border-left: 1px solid rgba(108,92,231,0.2);
  border-right: 1px solid rgba(108,92,231,0.2);
}

/* ---------- Tech principle / steps ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  counter-increment: step;
}
.step-card::before {
  content: counter(step, decimal-leading-zero);
  font-size: 48px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 14px;
  display: block;
  opacity: 0.85;
}
.step-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.step-card p { font-size: 13.5px; color: var(--c-text-3); line-height: 1.7; }

/* ---------- Code block ---------- */
.code-block {
  background: #060912;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 16px 0;
}
.code-block .code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--c-bg-2);
  border-bottom: 1px solid var(--c-border);
  font-size: 12px;
  color: var(--c-text-3);
}
.code-block .code-header .lang { font-family: var(--font-mono); }
.code-block .copy-btn {
  font-size: 12px;
  color: var(--c-text-3);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--c-border);
  transition: var(--transition);
}
.code-block .copy-btn:hover { color: var(--c-accent); border-color: var(--c-accent); }
.code-block .copy-btn.copied { color: var(--c-success); border-color: var(--c-success); }
.code-block pre {
  padding: 18px 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-text);
  overflow-x: auto;
}
.code-block .tok-cmd { color: var(--c-accent); }
.code-block .tok-flag { color: var(--c-warning); }
.code-block .tok-str { color: var(--c-success); }
.code-block .tok-com { color: var(--c-text-mute); }

/* ---------- Download cards ---------- */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.download-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.download-card:hover {
  transform: translateY(-4px);
  border-color: rgba(108,92,231,0.4);
  box-shadow: var(--shadow-glow);
}
.download-card.recommended {
  border-color: rgba(108,92,231,0.5);
  background: linear-gradient(180deg, rgba(108,92,231,0.08), var(--c-card));
}
.download-card .recommended-tag {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--grad-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
}
.download-card .arch-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  font-weight: 800;
  font-size: 16px;
  color: #fff;
  letter-spacing: -0.02em;
}
.download-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.download-card .arch-desc { color: var(--c-text-3); font-size: 13.5px; margin-bottom: 18px; }
.download-card .file-info {
  display: flex; justify-content: space-between;
  padding: 12px 0;
  border-top: 1px solid var(--c-border-soft);
  border-bottom: 1px solid var(--c-border-soft);
  font-size: 13px;
  color: var(--c-text-3);
  margin-bottom: 18px;
}
.download-card .file-info strong { color: var(--c-text); font-weight: 600; }
.download-card .btn { width: 100%; }

/* ---------- Download modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6,9,18,0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}
.modal-overlay.open { display: flex; animation: fadeIn 0.25s var(--ease); left:0;right:0;top:0;bottom:0;}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  padding: 36px;
  position: relative;
  box-shadow: var(--shadow);
  animation: slideUp 0.3s var(--ease);
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  color: var(--c-text-3);
  transition: var(--transition);
}
.modal-close:hover { background: rgba(255,107,107,0.15); color: var(--c-danger); }
.modal h3 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.modal .modal-sub { color: var(--c-text-3); font-size: 14px; margin-bottom: 28px; }
.qr-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
.qr-item {
  text-align: center;
  padding: 18px;
  background: #fff;
  border-radius: var(--radius);
}
.qr-item img {
  width: 100%;
  max-width: 170px;
  margin: 0 auto 12px;
}
.qr-item .qr-title { font-size: 13px; font-weight: 700; color: #0B1020; }
.qr-item .qr-desc { font-size: 11px; color: #555; margin-top: 4px; }
.modal-footer {
  padding-top: 20px;
  border-top: 1px solid var(--c-border-soft);
  font-size: 12.5px;
  color: var(--c-text-3);
  text-align: center;
}
.modal-footer a { color: var(--c-accent); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(108,92,231,0.4); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 15.5px;
  font-weight: 600;
  text-align: left;
  color: var(--c-text);
  transition: var(--transition);
}
.faq-q:hover { color: var(--c-accent); }
.faq-q .icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(108,92,231,0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  color: var(--c-primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-q .icon { transform: rotate(45deg); background: var(--c-primary); color: #fff; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}
.faq-item.open .faq-a { max-height: 600px; }
.faq-a-inner {
  padding: 0 24px 22px;
  color: var(--c-text-3);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  padding: 80px 0 60px;
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  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: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  line-height: 1.15;
}
.page-hero h1 .grad {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero p {
  font-size: 18px;
  color: var(--c-text-2);
  max-width: 680px;
  margin: 0 auto;
}
.breadcrumb {
  display: flex; justify-content: center; gap: 8px;
  font-size: 13px;
  color: var(--c-text-mute);
  margin-bottom: 20px;
}
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb .sep { color: var(--c-text-mute); }

/* ---------- Two-column content ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.two-col-text h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  line-height: 1.2;
}
.two-col-text p {
  color: var(--c-text-2);
  font-size: 16px;
  margin-bottom: 16px;
  line-height: 1.8;
}
.two-col-text ul.check-list { margin-top: 20px; }
.two-col-text ul.check-list li {
  display: flex; gap: 10px; align-items: flex-start;
  margin-bottom: 12px;
  color: var(--c-text-2);
  font-size: 15px;
}
.two-col-text ul.check-list svg {
  width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px;
  color: var(--c-success);
}
.two-col-visual {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
}

/* ---------- Requirement / spec table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.spec-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--c-border-soft);
}
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child {
  color: var(--c-text-3);
  width: 35%;
  font-weight: 500;
}
.spec-table td:last-child { color: var(--c-text); font-weight: 500; }

/* ---------- Version history ---------- */
.version-list { max-width: 820px; margin: 0 auto; }
.version-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
}
.version-item .v-num {
  font-size: 22px;
  font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  min-width: 90px;
}
.version-item .v-info h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.version-item .v-info p { font-size: 13.5px; color: var(--c-text-3); }
.version-item .v-date { font-size: 13px; color: var(--c-text-mute); }
.version-item .v-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: 8px;
}
.version-item .v-tag.latest { background: rgba(0,229,160,0.12); color: var(--c-success); }
.version-item .v-tag.stable { background: rgba(0,212,255,0.12); color: var(--c-accent); }

/* ---------- Call to action band ---------- */
.cta-band {
  background: linear-gradient(135deg, rgba(108,92,231,0.18), rgba(0,212,255,0.12));
  border: 1px solid rgba(108,92,231,0.3);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(108,92,231,0.15), transparent 40%),
    radial-gradient(circle at 80% 50%, rgba(0,212,255,0.12), transparent 40%);
  pointer-events: none;
}
.cta-band .container { position: relative; z-index: 1; }
.cta-band h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.cta-band p {
  color: var(--c-text-2);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}
.cta-band .hero-cta { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--c-bg-2);
  border-top: 1px solid var(--c-border-soft);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { color: var(--c-text-3); font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text);
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: var(--c-text-3);
  font-size: 14px;
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--c-accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--c-border-soft);
  font-size: 13px;
  color: var(--c-text-mute);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom .social { display: flex; gap: 10px; }
.footer-bottom .social a {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-text-3);
  transition: var(--transition);
}
.footer-bottom .social a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
  background: rgba(0,212,255,0.08);
}

/* ---------- Notice / callout ---------- */
.callout {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.2);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--c-text-2);
  margin: 16px 0;
}
.callout.warning {
  background: rgba(255,181,70,0.06);
  border-color: rgba(255,181,70,0.2);
  border-left-color: var(--c-warning);
}
.callout.danger {
  background: rgba(255,107,107,0.06);
  border-color: rgba(255,107,107,0.2);
  border-left-color: var(--c-danger);
}
.callout.success {
  background: rgba(0,229,160,0.06);
  border-color: rgba(0,229,160,0.2);
  border-left-color: var(--c-success);
}
.callout .icon {
  flex-shrink: 0;
  width: 20px; height: 20px;
  margin-top: 1px;
}
.callout strong { color: var(--c-text); }

/* ---------- Misc ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; }
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 48px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 460px; margin: 24px auto 0; }
  .feature-grid, .usecase-grid, .testimonial-grid, .download-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--c-border-soft); }
  .two-col { grid-template-columns: 1fr; }
  .section-title { font-size: 32px; }
  .page-hero h1 { font-size: 38px; }
}

@media (max-width: 720px) {
  .nav-menu {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--c-bg-2);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
    box-shadow: var(--shadow);
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 12px 14px; }
  .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 36px; }
  .hero p.lead { font-size: 16px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .section-subtitle { font-size: 15px; margin-bottom: 36px; }
  .feature-badges, .feature-grid, .usecase-grid, .testimonial-grid, .download-grid, .steps-grid {
    grid-template-columns: 1fr;
  }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-band { padding: 36px 20px; }
  .cta-band h2 { font-size: 26px; }
  .page-hero { padding: 60px 0 40px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 15px; }
  .version-item { grid-template-columns: 1fr; gap: 8px; }
  .version-item .v-date { font-size: 12px; }
  .modal { padding: 24px; }
  .qr-row { grid-template-columns: 1fr; gap: 14px; }
  .comparison-wrap { overflow-x: auto; }
  .comparison-table { min-width: 600px; }
  .two-col-text h2 { font-size: 24px; }
  .hero-card-float, .hero-card-float-2 { display: none; }
  .container, .container-narrow { padding: 0 16px; }
}