/* ============================================
   ShadowDesk Website – style.css
   ============================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #050810;
  --bg-dark: #030508;
  --surface: #0d1117;
  --surface-2: #161b22;
  --border: rgba(99,102,241,.18);
  --border-light: rgba(255,255,255,.07);
  --primary: #6366f1;
  --primary-2: #818cf8;
  --accent: #06b6d4;
  --accent-2: #22d3ee;
  --green: #10b981;
  --text: #f0f4ff;
  --text-muted: #8892a4;
  --text-dim: #4b5563;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 32px rgba(0,0,0,.45);
  --shadow-glow: 0 0 60px rgba(99,102,241,.25);
  --font: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --transition: .25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ---------- Gradient Text ---------- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-2), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #fff;
  font-weight: 600;
  font-size: .95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(99,102,241,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(99,102,241,.5); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  color: var(--text-muted);
  font-weight: 500;
  font-size: .95rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover { border-color: var(--primary-2); color: var(--text); }

.btn-large { padding: 15px 36px; font-size: 1rem; border-radius: 12px; }

/* ---------- Section base ---------- */
.section { padding: 100px 0; }
.section-dark { background: var(--bg-dark); }

.section-header { text-align: center; margin-bottom: 64px; }
.section-header h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 700; margin: 12px 0 16px; line-height: 1.3; }
.section-header p { color: var(--text-muted); max-width: 760px; margin: 0 auto; font-size: 1.05rem; }

.section-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.3);
  color: var(--primary-2);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(5,8,16,.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  white-space: nowrap;
}
.logo-icon { font-size: 1.5rem; }
.logo-text { background: linear-gradient(135deg, #fff, var(--primary-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.logo-img { width: 22px; height: 22px; object-fit: contain; background: #fff; border-radius: 4px; padding: 2px; display: block; }
.logo-img-full { height: 28px; width: auto; object-fit: contain; background: #fff; border-radius: 6px; padding: 2px 6px; display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: .9rem;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav-links .nav-cta {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #fff;
  padding: 8px 18px;
  font-weight: 600;
}
.nav-links .nav-cta:hover { background: linear-gradient(135deg, var(--primary-2), var(--primary)); }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger { display: flex; align-items: center; gap: 4px; cursor: pointer; user-select: none; }
.dropdown-arrow { font-size: .7rem; opacity: .7; transition: transform .2s ease; display: inline-block; }
.nav-dropdown:hover .dropdown-arrow { transform: rotate(180deg); }
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 168px;
  padding-top: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 200;
}
.dropdown-menu-inner {
  background: rgba(10,14,26,.96);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dropdown-menu li { list-style: none; }
.dropdown-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: .85rem;
  white-space: nowrap;
  transition: var(--transition);
}
.dropdown-menu a:hover { color: var(--text); background: rgba(255,255,255,.07); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero > .container {
  width: 100%;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 40%, transparent 100%);
}
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.glow-1 { width: 600px; height: 600px; background: rgba(99,102,241,.18); top: -200px; left: -100px; }
.glow-2 { width: 500px; height: 500px; background: rgba(6,182,212,.12); bottom: -100px; right: -50px; }
.glow-3 { width: 700px; height: 700px; background: rgba(99,102,241,.22); top: -200px; right: -200px; }
.glow-4 { width: 500px; height: 500px; background: rgba(6,182,212,.15); bottom: -200px; left: -100px; }

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.hero-content { flex: 1; min-width: 0; }

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.35);
  color: var(--primary-2);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 20px;
  letter-spacing: -.02em;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.stat { text-align: center; }
.stat-num { display: block; font-size: 1.7rem; font-weight: 800; color: #fff; line-height: 1; }
.stat-label { display: block; font-size: .72rem; color: var(--text-muted); margin-top: 4px; letter-spacing: .03em; }
.stat-divider { width: 1px; height: 40px; background: var(--border-light); }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Monitor */
.hero-visual {
  flex: 1;
  min-width: 0;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.monitor-frame {
  position: relative;
  width: 100%;
  max-width: 460px;
  animation: float 4s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }

.monitor-screen {
  background: #0d1117;
  border: 2px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow), var(--shadow-glow);
  aspect-ratio: 16/10;
}
.screen-ui { height: 100%; display: flex; flex-direction: column; }
.screen-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #0a0e14;
  border-bottom: 1px solid var(--border-light);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.r { background: #ff5f57; }
.dot.y { background: #febc2e; }
.dot.g { background: #28c840; }
.screen-title { margin-left: 8px; font-size: .72rem; color: var(--text-dim); }

.screen-body { flex: 1; display: flex; overflow: hidden; }
.screen-sidebar { width: 50px; background: #080b10; border-right: 1px solid var(--border-light); padding: 12px 8px; display: flex; flex-direction: column; gap: 10px; }
.sb-item { height: 6px; border-radius: 4px; background: var(--border-light); }
.sb-item.active { background: var(--primary); }

.screen-main { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.sm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sm-card { height: 44px; border-radius: 8px; border: 1px solid var(--border-light); }
.sm-card.c1 { background: linear-gradient(135deg, rgba(99,102,241,.25), rgba(99,102,241,.05)); }
.sm-card.c2 { background: linear-gradient(135deg, rgba(6,182,212,.2), rgba(6,182,212,.04)); }
.sm-card.c3 { background: linear-gradient(135deg, rgba(16,185,129,.2), rgba(16,185,129,.04)); }
.sm-card.c4 { background: linear-gradient(135deg, rgba(245,158,11,.2), rgba(245,158,11,.04)); }

.sm-chart { display: flex; align-items: flex-end; gap: 6px; flex: 1; }
.chart-bar {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(to top, var(--primary), var(--accent));
  opacity: .7;
  animation: chart-pulse 2s ease-in-out infinite alternate;
}
.chart-bar:nth-child(odd) { animation-delay: .3s; }
@keyframes chart-pulse { to { opacity: 1; } }

.monitor-stand { width: 30px; height: 32px; background: linear-gradient(to bottom, #1c2130, #0d1117); margin: 0 auto; border-radius: 0 0 4px 4px; }
.monitor-base { width: 90px; height: 8px; background: #1c2130; border-radius: 4px; margin: 0 auto; }

.badge-float {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(13,17,23,.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  white-space: nowrap;
  animation: float 4s ease-in-out infinite;
}
.b1 { bottom: 60px; left: -10px; animation-delay: 1s; }
.b2 { top: 40px; right: 0; animation-delay: 2s; }
.badge-icon { font-size: 1.4rem; }
.badge-title { font-size: .82rem; font-weight: 600; }
.badge-sub { font-size: .72rem; color: var(--text-muted); }

/* ============================================
   HIGHLIGHTS
   ============================================ */
.highlights {
  padding: 56px 0;
  background: var(--surface);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.hl-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.hl-card { text-align: center; }
.hl-icon { font-size: 2rem; margin-bottom: 12px; }
.hl-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.hl-card p { color: var(--text-muted); font-size: .875rem; line-height: 1.65; }
/* ============================================
   FEATURES
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--border);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,.4);
}
.feature-card.featured {
  background: linear-gradient(135deg, rgba(99,102,241,.1), rgba(6,182,212,.06));
  border-color: rgba(99,102,241,.35);
  grid-row: span 2;
}
.fc-icon { font-size: 1.75rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-muted); font-size: .875rem; line-height: 1.7; }
.fc-list { color: var(--text-muted); font-size: .875rem; }
.fc-list li { padding: 5px 0; padding-left: 16px; position: relative; }
.fc-list li::before { content: '→'; position: absolute; left: 0; color: var(--primary-2); font-size: .8rem; }

/* ============================================
   SCENARIOS
   ============================================ */
.scenarios-tabs { display: flex; flex-direction: column; gap: 24px; }
.tab-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.tab-btn {
  padding: 8px 18px;
  border-radius: 24px;
  border: 1.5px solid var(--border-light);
  background: transparent;
  color: var(--text-muted);
  font-size: .875rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}
.tab-btn:hover { border-color: var(--primary); color: var(--text); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

.tab-content { position: relative; min-height: 300px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.scenario-layout {
  display: flex;
  gap: 48px;
  align-items: center;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 40px;
}
.scenario-info { flex: 1; }
.scenario-icon { font-size: 2.5rem; margin-bottom: 16px; }
.scenario-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 14px; }
.scenario-info p { color: var(--text-muted); margin-bottom: 20px; line-height: 1.75; }
.scenario-points { display: flex; flex-direction: column; gap: 8px; }
.scenario-points li {
  color: var(--text-muted);
  font-size: .9rem;
  padding-left: 20px;
  position: relative;
}
.scenario-points li::before {
  content: '✓';
  position: absolute; left: 0;
  color: var(--green);
  font-weight: 700;
}
.scenario-visual { flex: 0 0 260px; display: flex; justify-content: center; align-items: center; }

/* Infra diagram */
.infra-diagram { display: flex; flex-direction: column; align-items: center; gap: 12px; width: 100%; }
.infra-node {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}
.infra-node.login { background: rgba(99,102,241,.15); border-color: var(--primary); }
.infra-node.compute { background: rgba(6,182,212,.1); border-color: var(--accent); }
.infra-node.vis { background: rgba(16,185,129,.1); border-color: var(--green); }
.infra-arrows { display: flex; gap: 40px; justify-content: center; }
.infra-arrow { width: 1px; height: 24px; background: linear-gradient(to bottom, var(--border), transparent); }
.infra-nodes { display: flex; gap: 12px; }
.infra-label { font-size: .72rem; color: var(--primary-2); margin-top: 8px; }

/* CAE visual */
.cae-display {
  width: 180px; height: 140px;
  background: linear-gradient(135deg, rgba(6,182,212,.08), rgba(99,102,241,.08));
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.cae-mesh {
  width: 120px; height: 90px;
  background-image:
    linear-gradient(rgba(6,182,212,.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6,182,212,.4) 1px, transparent 1px);
  background-size: 12px 12px;
  border-radius: 4px;
  animation: mesh-pulse 2s ease-in-out infinite alternate;
}
@keyframes mesh-pulse { to { opacity: .4; } }
.cae-fps {
  position: absolute; bottom: 10px; right: 12px;
  font-size: .72rem; font-weight: 700; color: var(--accent);
}

/* Chip diagram */
.chip-diagram { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.chip-core {
  width: 130px; height: 130px;
  background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(6,182,212,.08));
  border: 2px solid var(--primary);
  border-radius: 10px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  position: relative;
}
.chip-label { font-size: .75rem; font-weight: 700; color: var(--primary-2); }
.chip-grid {
  width: 60px; height: 60px;
  background-image:
    linear-gradient(rgba(99,102,241,.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.5) 1px, transparent 1px);
  background-size: 8px 8px;
  border-radius: 4px;
}
.chip-lock { font-size: .8rem; color: var(--green); font-weight: 600; }

/* Viz chart */
.viz-chart { display: flex; align-items: flex-end; gap: 14px; height: 140px; }
.viz-bar {
  flex: 1;
  background: linear-gradient(to top, var(--primary), var(--accent));
  border-radius: 6px 6px 0 0;
  position: relative;
  display: flex; align-items: flex-start; justify-content: center;
  opacity: .8;
}
.viz-bar span { font-size: .65rem; color: var(--text-muted); writing-mode: vertical-rl; padding: 6px 0; }

/* Color wheel (media) */
.color-wheel { position: relative; width: 140px; height: 140px; }
.cw-segment {
  position: absolute; inset: 0;
  border-radius: 50%;
}
.cw-segment.s1 { background: conic-gradient(from 0deg, #f43f5e 0%, #fb7185 33%, transparent 33%); }
.cw-segment.s2 { background: conic-gradient(from 120deg, #6366f1 0%, #818cf8 33%, transparent 33%); }
.cw-segment.s3 { background: conic-gradient(from 240deg, #06b6d4 0%, #22d3ee 33%, transparent 33%); }
.cw-label {
  position: absolute; inset: 30%;
  background: var(--bg-dark);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 700; color: var(--text);
}

/* Xinchuang logos */
.xc-logos { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; max-width: 240px; }
.xc-chip {
  padding: 6px 14px;
  border-radius: 6px;
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.3);
  color: var(--primary-2);
  font-size: .78rem;
  font-weight: 600;
}

/* Game stats */
.game-stats { display: flex; flex-direction: column; gap: 16px; align-items: center; }
.gs-item { display: flex; align-items: baseline; gap: 6px; }
.gs-num { font-size: 2.2rem; font-weight: 800; background: linear-gradient(135deg, var(--primary-2), var(--accent-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gs-unit { font-size: .85rem; color: var(--text-muted); }

/* ============================================
   VALUE
   ============================================ */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.value-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.value-card:hover::before { opacity: 1; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.vc-num { font-size: 2.5rem; font-weight: 900; color: rgba(99,102,241,.15); line-height: 1; margin-bottom: 14px; font-family: var(--mono); }
.value-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 12px; }
.value-card p { color: var(--text-muted); font-size: .875rem; line-height: 1.7; }

/* ============================================
   DEPLOY
   ============================================ */
.deploy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.deploy-card {
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}
.deploy-card:hover { border-color: var(--border); transform: translateY(-3px); }
.dc-step { font-size: .75rem; font-weight: 700; color: var(--primary-2); letter-spacing: .06em; margin-bottom: 14px; }
.dc-icon { font-size: 2rem; margin-bottom: 14px; }
.deploy-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.deploy-card p { color: var(--text-muted); font-size: .875rem; line-height: 1.7; margin-bottom: 16px; }
.dc-code {
  background: var(--bg-dark);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent-2);
  line-height: 1.7;
}
.dc-tag { font-size: .78rem; color: var(--primary-2); }

/* ============================================
   SECURITY
   ============================================ */
.security-layout {
  display: flex;
  gap: 64px;
  align-items: center;
}
.security-visual { flex: 0 0 300px; display: flex; justify-content: center; }

.shield {
  position: relative;
  width: 220px; height: 220px;
  display: flex; align-items: center; justify-content: center;
}
.shield-outer {
  width: 120px; height: 120px;
  background: linear-gradient(135deg, rgba(99,102,241,.2), rgba(6,182,212,.1));
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
  box-shadow: 0 0 30px rgba(99,102,241,.3);
}
.shield-inner { width: 76px; height: 76px; border-radius: 50%; background: rgba(99,102,241,.15); display: flex; align-items: center; justify-content: center; }
.shield-core { font-size: 2rem; }
.shield-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  opacity: .2;
  animation: ring-pulse 3s ease-in-out infinite;
}
.r1 { width: 150px; height: 150px; border-color: var(--primary); animation-delay: 0s; }
.r2 { width: 180px; height: 180px; border-color: var(--accent); animation-delay: .8s; }
.r3 { width: 210px; height: 210px; border-color: var(--primary-2); animation-delay: 1.6s; }
@keyframes ring-pulse { 0%,100%{opacity:.12} 50%{opacity:.3} }
.shield-point {
  position: absolute;
  background: rgba(13,17,23,.9);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .72rem;
  font-weight: 600;
  color: var(--primary-2);
  white-space: nowrap;
  z-index: 3;
}
.p1 { top: 8%; left: 50%; transform: translateX(-50%); }
.p2 { right: -10px; bottom: 28%; transform: translateY(50%); }
.p4 { left: -10px; bottom: 28%; transform: translateY(50%); }

.security-features { flex: 1; display: flex; flex-direction: column; gap: 28px; }
.sf-item { display: flex; gap: 18px; align-items: flex-start; }
.sf-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.sf-content h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.sf-content p { color: var(--text-muted); font-size: .875rem; line-height: 1.7; }

/* ============================================
   COMPAT
   ============================================ */
.compat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.compat-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.compat-icon { font-size: 1rem; }
.compat-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ctag {
  padding: 5px 12px;
  border-radius: 6px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border-light);
  font-size: .78rem;
  color: var(--text-muted);
}
.ctag-xc {
  background: rgba(99,102,241,.08);
  border-color: rgba(99,102,241,.25);
  color: var(--primary-2);
}
.ctag-more {
  background: rgba(6,182,212,.06);
  border-color: rgba(6,182,212,.2);
  color: var(--accent);
  font-style: italic;
}

/* ============================================
   CASES
   ============================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 36px;
  transition: var(--transition);
}
.case-card:hover { border-color: var(--border); transform: translateY(-4px); box-shadow: var(--shadow); }
.case-icon { font-size: 2.5rem; margin-bottom: 12px; }
.case-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.3);
  color: var(--accent-2);
  font-size: .72rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.case-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.case-card p { color: var(--text-muted); font-size: .875rem; line-height: 1.75; margin-bottom: 20px; }
.case-result { display: flex; flex-wrap: wrap; gap: 10px; }
.cr-item { font-size: .78rem; color: var(--green); font-weight: 600; }

/* ============================================
   CTA
   ============================================ */
.cta-section {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
}
.cta-bg { position: absolute; inset: 0; z-index: 0; }
.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.cta-content h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; margin-bottom: 16px; }
.cta-content p { color: var(--text-muted); font-size: 1.1rem; margin-bottom: 40px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 28px; }
.cta-docs { color: var(--text-dim); font-size: .875rem; display: flex; gap: 8px; justify-content: center; align-items: center; }
.cta-docs a { color: var(--primary-2); transition: var(--transition); }
.cta-docs a:hover { color: var(--accent-2); }
.cta-email { display: flex; align-items: center; gap: 12px; justify-content: center; margin-top: 8px; }
.cta-email-label { color: var(--text-muted); font-size: .95rem; }
.cta-email-addr { color: var(--primary-2); font-size: 1.05rem; font-weight: 600; letter-spacing: .01em; user-select: all; }
.footer-email { color: var(--text-muted); font-size: .875rem; }
.cta-social { display: flex; align-items: center; gap: 24px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.cta-social-link { display: flex; align-items: center; gap: 8px; color: var(--primary-2); font-size: .95rem; font-weight: 500; transition: var(--transition); text-decoration: none; }
.cta-social-link:hover { color: var(--accent-2); }
.social-badge { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 6px; font-size: .85rem; font-weight: 700; flex-shrink: 0; }
.zhihu-badge { background: #0084ff; color: #fff; }
.wechat-badge { background: #07c160; color: #fff; }
.cta-wechat { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.cta-wechat-label { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: .95rem; font-weight: 500; }
.wechat-qr { width: 110px; height: 110px; object-fit: cover; border-radius: 10px; border: 2px solid rgba(255,255,255,.1); }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-light);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--text-muted); font-size: .875rem; margin-top: 14px; line-height: 1.8; }
.footer-brand .logo { margin-bottom: 0; }
.footer-col h5 { font-size: .85rem; font-weight: 700; color: var(--text); margin-bottom: 16px; text-transform: uppercase; letter-spacing: .04em; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--text-muted); font-size: .875rem; transition: var(--transition); }
.footer-col a:hover { color: var(--primary-2); }
.footer-social-link { display: flex; align-items: center; gap: 6px; color: var(--text-muted); font-size: .875rem; text-decoration: none; transition: var(--transition); }
.footer-col a.footer-social-link:hover { color: var(--primary-2); }
.footer-wechat-item { display: flex; flex-direction: column; gap: 8px; }
.footer-wechat-label { cursor: default; }
.footer-wechat-qr { width: 90px; height: 90px; object-fit: cover; border-radius: 8px; border: 1px solid rgba(255,255,255,.1); }
.footer-bottom { border-top: 1px solid var(--border-light); padding-top: 24px; text-align: center; }
.footer-bottom p { color: var(--text-dim); font-size: .82rem; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hl-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.featured { grid-row: span 1; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: fixed; top: 68px; left: 0; right: 0; background: rgba(5,8,16,.96); backdrop-filter: blur(16px); flex-direction: column; padding: 24px; gap: 4px; border-bottom: 1px solid var(--border-light); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .nav-dropdown { width: 100%; }
  .dropdown-menu { position: static; transform: none; min-width: unset; width: 100%; padding-top: 0; opacity: 0; max-height: 0; overflow: hidden; pointer-events: none; transition: opacity .18s ease, max-height .22s ease; }
  .dropdown-menu-inner { background: rgba(255,255,255,.04); border: none; border-radius: var(--radius-sm); padding: 4px 0 4px 12px; }
  .dropdown-menu.mobile-open { opacity: 1; max-height: 200px; pointer-events: auto; }
  .nav-dropdown:hover .dropdown-menu { opacity: 0; max-height: 0; pointer-events: none; transform: none; }
  .nav-dropdown:hover .dropdown-menu.mobile-open { opacity: 1; max-height: 200px; pointer-events: auto; }

  .hero .container { flex-direction: column; gap: 48px; }
  .hero-visual { width: 100%; max-width: 360px; }
  .b1, .b2 { display: none; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-content { text-align: center; }
  .hero-desc { margin: 0 auto 36px; }

  .scenario-layout { flex-direction: column; padding: 28px; }
  .scenario-visual { width: 100%; }

  .compat-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .deploy-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .security-layout { flex-direction: column; }
  .security-visual { width: 100%; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hl-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 14px; }
  .stat-divider { display: none; }
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}