/* ============================================
   普光智物 · PUGUANG
   Main Stylesheet
   ============================================ */

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

:root {
  --bg-0: #050505;
  --bg-1: #080808;
  --bg-2: #0D0D0F;
  --bg-3: #111115;
  --bg-card: #0F0F14;
  --bg-card-hover: #141420;
  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-muted: #5A5A65;
  --accent-blue: #3B82F6;
  --accent-cyan: #06B6D4;
  --accent-purple: #7C3AED;
  --accent-blue-dim: rgba(59, 130, 246, 0.15);
  --accent-cyan-dim: rgba(6, 182, 212, 0.12);
  --accent-purple-dim: rgba(124, 58, 237, 0.12);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', Helvetica, Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-0);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Hide scrollbar while keeping scroll */
::-webkit-scrollbar { width: 0; background: transparent; }
body { scrollbar-width: none; }

/* Selection */
::selection {
  background: rgba(6, 182, 212, 0.2);
  color: var(--text-primary);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-logo {
  text-decoration: none;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  display: block;
  border-radius: 6px;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-logo-cn {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.nav-logo-en {
  font-size: 8px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  line-height: 1.1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin-left: auto;
}

.nav-link {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: var(--text-primary);
}

.btn-cta-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  background: var(--text-primary);
  color: var(--bg-0);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 100px;
  transition: var(--transition);
  letter-spacing: 0.01em;
  flex-shrink: 0;
}

.btn-cta-nav:hover {
  background: #ffffff;
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================
   MOBILE MENU
   ============================================ */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu-bg {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 5, 0.97);
  backdrop-filter: blur(20px);
}

.mobile-menu-nav {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  text-align: center;
}

.mobile-menu-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-link {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  padding: 8px 0;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

.mobile-menu.open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

.btn-mobile-cta {
  display: inline-block;
  padding: 14px 32px;
  background: var(--text-primary);
  color: var(--bg-0);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 100px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease 0.3s, transform 0.4s ease 0.3s;
}

.mobile-menu.open .btn-mobile-cta {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   MOUSE GLOW
   ============================================ */

.mouse-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  will-change: transform;
}

/* ============================================
   HERO
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-0);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 40px 80px;
  width: 100%;
}

.hero-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

.hero-label-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(52px, 7vw, 96px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text-primary);
  margin-bottom: 28px;
}

.hero-title-line {
  display: block;
}

.hero-rotating-word {
  color: var(--accent-cyan);
  display: inline-block;
  transition: opacity 0.3s ease;
}

.hero-rotating-word.fading {
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.hero-sub {
  font-size: 18px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 480px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--text-primary);
  color: var(--bg-0);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 100px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-primary:hover {
  background: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255, 255, 255, 0.12);
}

.btn-primary.large {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: transparent;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 100px;
  border: 1px solid var(--border-hover);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-inline {
  color: var(--accent-cyan);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-inline:hover { opacity: 0.75; gap: 12px; }

.arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

*:hover .arrow { transform: translateX(3px); }

.hero-badges {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-badge {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.hero-badge-sep {
  color: var(--text-muted);
  opacity: 0.4;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.3;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background: var(--text-secondary);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

.scroll-text {
  font-size: 9px;
  letter-spacing: 0.25em;
  color: var(--text-secondary);
}

/* ============================================
   SECTION COMMONS
   ============================================ */

section {
  position: relative;
  z-index: 1;
}

.section-eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-bottom: 24px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-title.large {
  font-size: clamp(44px, 5.5vw, 72px);
  letter-spacing: -0.04em;
}

.section-sub {
  font-size: 18px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 60px;
  max-width: 560px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 420px;
}

.section-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.section-split.reverse {
  direction: rtl;
}

.section-split.reverse > * {
  direction: ltr;
}

/* Reveal animation */
.reveal-section {
  padding: 120px 0;
}

.reveal-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   SECTION: IDEA / AI INPUT
   ============================================ */

.section-idea {
  padding: 140px 0 120px;
  background: var(--bg-0);
}

.section-idea .section-title {
  margin-bottom: 12px;
}

.section-idea .section-sub {
  margin-bottom: 64px;
}

.ai-input-demo {
  max-width: 700px;
  margin: 0 auto;
}

.ai-input-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 40px;
  position: relative;
  transition: border-color 0.4s ease;
}

.ai-input-wrapper:hover,
.ai-input-wrapper.active {
  border-color: rgba(6, 182, 212, 0.3);
}

.ai-input-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.ai-input-box {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
  min-height: 28px;
  display: flex;
  align-items: center;
  gap: 2px;
}

.ai-typed-text {
  color: var(--text-primary);
}

.ai-cursor {
  display: inline-block;
  width: 2px;
  height: 18px;
  background: var(--accent-cyan);
  border-radius: 1px;
  animation: blink 1s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.ai-input-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* AI Breakdown flow */
.ai-breakdown {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.ai-breakdown.visible {
  opacity: 1;
}

.breakdown-flow {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding-left: 20px;
  border-left: 1px solid var(--border);
  margin-bottom: 32px;
}

.breakdown-item {
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.breakdown-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.breakdown-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

.breakdown-node.final {
  color: var(--accent-cyan);
  font-size: 18px;
  font-weight: 700;
}

.breakdown-icon {
  font-size: 12px;
  color: var(--text-muted);
}

.breakdown-connector {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin-left: 6px;
}

.breakdown-conclusion {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease 0.3s, transform 0.5s ease 0.3s;
}

.breakdown-conclusion.visible {
  opacity: 1;
  transform: translateY(0);
}

.breakdown-conclusion strong {
  color: var(--accent-cyan);
}

.ai-cta-line {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease 0.5s, transform 0.4s ease 0.5s;
}

.ai-cta-line.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   SECTION: CAPABILITY MATRIX
   ============================================ */

.section-capability {
  padding: 120px 0 80px;
}

.capability-matrix {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
  margin: 60px 0 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.matrix-node {
  position: relative;
  padding: 40px 28px;
  background: var(--bg-1);
  cursor: pointer;
  transition: background var(--transition);
  overflow: hidden;
  outline: none;
}

.matrix-node:focus-visible {
  outline: 1px solid var(--accent-cyan);
  outline-offset: -1px;
}

.matrix-node:hover,
.matrix-node:focus-visible {
  background: var(--bg-card-hover);
}

.matrix-node.highlight {
  background: var(--bg-2);
}

.node-glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(circle at center, rgba(6,182,212,0.1) 0%, transparent 70%);
  transition: opacity var(--transition);
}

.matrix-node.highlight .node-glow {
  background: radial-gradient(circle at center, rgba(124,58,237,0.1) 0%, transparent 70%);
}

.matrix-node:hover .node-glow,
.matrix-node:focus-visible .node-glow {
  opacity: 1;
}

.node-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  transition: color var(--transition);
  line-height: 1.4;
}

.matrix-node:hover .node-label,
.matrix-node:focus-visible .node-label {
  color: var(--accent-cyan);
}

.matrix-node.highlight .node-label {
  color: var(--text-primary);
}

.matrix-node.highlight:hover .node-label {
  color: var(--accent-cyan);
}

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 12px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease;
}

.matrix-node:hover .node-tags,
.matrix-node:focus-visible .node-tags {
  max-height: 100px;
  opacity: 1;
}

.node-tags span {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  padding: 3px 8px;
  border-radius: 100px;
  border: 1px solid var(--border);
}

.matrix-hint {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 80px;
  letter-spacing: 0.05em;
}

/* ============================================
   SECTION: SOFTWARE
   ============================================ */

.section-software {
  background: var(--bg-0);
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.tag {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: var(--transition);
  cursor: default;
}

.tag:hover {
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--text-primary);
  background: rgba(6, 182, 212, 0.05);
}

.tag.accent {
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
  background: rgba(6, 182, 212, 0.04);
}

/* ============================================
   SECTION: MOBILE
   ============================================ */

.section-mobile {
  background: var(--bg-0);
}

.mobile-frames {
  display: flex;
  gap: -30px;
  justify-content: center;
  padding: 20px 0;
}

.phone-frame {
  width: 200px;
  height: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 12px;
  position: relative;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

.phone-frame.offset {
  transform: translate(30px, 30px) rotate(4deg);
  z-index: 0;
}

.phone-frame:first-child {
  z-index: 1;
  transform: rotate(-3deg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-2);
  border-radius: 20px;
  overflow: hidden;
}

.phone-ui {
  padding: 12px 10px;
}

.phone-topbar {
  width: 60%;
  height: 6px;
  background: var(--bg-3);
  border-radius: 3px;
  margin-bottom: 12px;
}

.phone-card {
  width: 100%;
  height: 60px;
  background: var(--bg-3);
  border-radius: 10px;
  margin-bottom: 8px;
  border: 1px solid var(--border);
}

.phone-card.sm {
  height: 36px;
}

.phone-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.phone-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.phone-dot.cyan { background: var(--accent-cyan); }
.phone-dot.purple { background: var(--accent-purple); }

.phone-line {
  height: 6px;
  background: var(--bg-3);
  border-radius: 3px;
  flex: 1;
}

.phone-line.sm { max-width: 70%; }

.phone-chart {
  width: 100%;
  height: 60px;
  margin-bottom: 8px;
}

.phone-chart svg { width: 100%; height: 100%; }

.phone-ui.alt .phone-topbar {
  background: rgba(6, 182, 212, 0.2);
}

.mobile-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.tag-pill {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: var(--transition);
}

.tag-pill.accent {
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
}

/* ============================================
   SECTION: HARDWARE
   ============================================ */

.section-hardware {
  background: var(--bg-0);
  overflow: hidden;
  padding-bottom: 60px;
}

.section-hardware .container {
  margin-bottom: 60px;
}

.hardware-diagram {
  display: grid;
  grid-template-columns: 1fr 200px 1fr;
  gap: 0;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.hw-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.hw-device-visual {
  width: 160px;
}

.device-svg {
  width: 100%;
  height: auto;
}

.hw-protocols {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.protocol-tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(6, 182, 212, 0.06);
  color: var(--accent-cyan);
  font-size: 11px;
  font-weight: 600;
  border: 1px solid rgba(6, 182, 212, 0.15);
  border-radius: 100px;
  letter-spacing: 0.05em;
}

.hw-center {
  position: relative;
  height: 360px;
}

.hw-canvas {
  width: 100%;
  height: 100%;
}

.hw-apps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.hw-app-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  transition: var(--transition);
}

.hw-app-item:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.hw-app-item.highlight {
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
  background: rgba(6, 182, 212, 0.04);
}

.hw-app-icon {
  font-size: 14px;
  color: var(--text-muted);
}

.hw-capabilities {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

/* ============================================
   SECTION: INDUSTRY（辅助证明，非卖点 —— 刻意降低视觉权重）
   ============================================ */

.section-industry {
  background: var(--bg-0);
  padding: 72px 0;
}

.industry-inner {
  max-width: 760px;
}

.section-industry em {
  font-style: normal;
  color: var(--accent-cyan);
}

.industry-lead {
  font-size: 15px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 30px;
  max-width: 620px;
}

.industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.industry-tag {
  padding: 7px 14px;
  font-size: 13px;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: 100px;
  transition: var(--transition);
}

.industry-tag:hover {
  color: var(--text-secondary);
  border-color: var(--border-hover);
}

.industry-note {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  max-width: 620px;
}

/* ============================================
   HERO · FREE DEMO PROMISE
   ============================================ */

.hero .hero-ctas {
  margin-bottom: 22px;
}

.hero-promise {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.promise-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(6, 182, 212, 0.05);
  border: 1px solid rgba(6, 182, 212, 0.16);
  border-radius: 100px;
  letter-spacing: 0.01em;
}

.promise-check {
  color: var(--accent-cyan);
  font-size: 11px;
}

/* ============================================
   SECTION: HARDWARE FUSION PIPELINE
   ============================================ */

.section-hardware .container:last-child {
  margin-bottom: 0;
}

.fusion-pipeline {
  margin-top: 56px;
  text-align: center;
}

.pipeline-inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-width: 88px;
}

.pipeline-node {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 15px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: var(--transition);
  animation: pipelinePulse 5s ease-in-out infinite;
}

.pipeline-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}

.pipeline-link {
  flex: 1;
  height: 1px;
  min-width: 24px;
  max-width: 120px;
  margin: 0 -2px 30px;
  background: linear-gradient(90deg, var(--border), rgba(6, 182, 212, 0.35), var(--border));
  background-size: 200% 100%;
  animation: pipelineFlow 2.4s linear infinite;
}

.pipeline-step[data-stage="1"] .pipeline-node { animation-delay: 0s; }
.pipeline-step[data-stage="2"] .pipeline-node { animation-delay: 1s; }
.pipeline-step[data-stage="3"] .pipeline-node { animation-delay: 2s; }
.pipeline-step[data-stage="4"] .pipeline-node { animation-delay: 3s; }
.pipeline-step[data-stage="5"] .pipeline-node { animation-delay: 4s; }

@keyframes pipelinePulse {
  0% {
    border-color: rgba(6, 182, 212, 0.55);
    color: var(--accent-cyan);
    box-shadow: 0 0 0 8px rgba(6, 182, 212, 0.07);
  }
  18% {
    border-color: rgba(6, 182, 212, 0.55);
    color: var(--accent-cyan);
    box-shadow: 0 0 0 8px rgba(6, 182, 212, 0.07);
  }
  20%, 100% {
    border-color: var(--border);
    color: var(--text-secondary);
    box-shadow: 0 0 0 0 rgba(6, 182, 212, 0);
  }
}

@keyframes pipelineFlow {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.pipeline-note {
  margin-top: 28px;
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ============================================
   SECTION: AUDIENCE
   ============================================ */

.audience-block {
  margin-top: 72px;
  padding-top: 56px;
  border-top: 1px solid var(--border);
}

.audience-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.audience-item {
  background: var(--bg-1);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background var(--transition);
}

.audience-item:hover {
  background: var(--bg-card-hover);
}

.audience-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.audience-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* No-cases closing line */
.nocases-line {
  font-size: 20px !important;
  color: var(--text-secondary) !important;
  line-height: 1.7;
  margin-top: 48px !important;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

/* AI application grid · primary row */
.ai-app-grid.primary {
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.ai-app-item.large {
  padding: 26px 18px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ============================================
   SECTION: AI
   ============================================ */

.section-ai {
  background: var(--bg-0);
  overflow: hidden;
}

.ai-workflow-container {
  position: relative;
  height: 280px;
  margin: 60px 0;
}

.ai-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.workflow-nodes {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}

.wf-node {
  display: flex;
  align-items: center;
  justify-content: center;
}

.wf-node-inner {
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: var(--transition);
}

.wf-node.highlight .wf-node-inner {
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
}

.wf-node.ai-node .wf-node-inner {
  background: rgba(124, 58, 237, 0.08);
  border-color: rgba(124, 58, 237, 0.3);
  color: #a855f7;
  font-size: 18px;
  padding: 14px 24px;
}

.ai-applications {
  margin: 0 0 60px;
}

.ai-app-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}

.ai-app-item {
  padding: 14px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  cursor: default;
  transition: var(--transition);
}

.ai-app-item:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.ai-app-item.highlight {
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
  background: rgba(6, 182, 212, 0.04);
}

.ai-conclusion {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: -0.02em;
  padding: 60px 0;
  border-top: 1px solid var(--border);
}

/* ============================================
   SECTION: PROCESS
   ============================================ */

.section-process {
  background: var(--bg-0);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 60px;
}

.process-step {
  background: var(--bg-1);
  padding: 40px 28px;
  position: relative;
  transition: background var(--transition);
}

.process-step:hover {
  background: var(--bg-card-hover);
}

.process-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-variant-numeric: tabular-nums;
}

.process-num.accent {
  color: var(--accent-cyan);
}

.process-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.process-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================
   SECTION: WHY
   ============================================ */

.section-why {
  background: var(--bg-0);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  transition: var(--transition);
}

.why-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.why-num {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.why-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.why-quote {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============================================
   SECTION: NO CASES
   ============================================ */

.section-nocases {
  padding: 160px 0;
  background: var(--bg-0);
}

.nocases-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.nocases-title {
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 60px;
}

.nocases-text {
  margin-bottom: 56px;
}

.nocases-text p {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.nocases-question {
  font-size: 28px !important;
  font-weight: 700 !important;
  color: var(--text-primary) !important;
  letter-spacing: -0.02em;
}

.nocases-sub {
  font-size: 22px !important;
  font-weight: 700 !important;
  color: var(--accent-cyan) !important;
}

/* ============================================
   SECTION: DEMO
   ============================================ */

.section-demo {
  background: var(--bg-0);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-demo .container {
  text-align: center;
}

.section-demo .section-sub {
  margin: 0 auto 48px;
}

.section-demo .btn-primary {
  margin-bottom: 48px;
}

.demo-guarantees {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.guarantee-check {
  color: var(--accent-cyan);
  font-size: 12px;
}

.demo-note {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 480px;
  margin: 0 auto;
}

.demo-note p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 8px;
}

.demo-note p:last-child { margin-bottom: 0; }

.demo-note strong {
  color: var(--text-primary);
}

/* ============================================
   SECTION: CONTACT
   ============================================ */

.section-contact {
  padding: 120px 0 160px;
  background: var(--bg-0);
}

.contact-inner {
  max-width: 600px;
}

.contact-title {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.contact-sub {
  font-size: 18px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 56px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 48px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.contact-method:hover {
  border-color: var(--border-hover);
}

.contact-method-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.06);
  border-radius: 10px;
  flex-shrink: 0;
}

.contact-method-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-method-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-method-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.contact-qrcode {
  width: 96px;
  height: 96px;
  display: block;
  margin: 10px 0;
  padding: 6px;
  background: #fff;
  border-radius: 8px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: 80px 0 40px;
  background: var(--bg-0);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 80px;
  gap: 60px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.footer-logo-mark {
  width: 28px;
  height: 28px;
  display: block;
  border-radius: 7px;
  margin-bottom: 14px;
  object-fit: contain;
}

.footer-tagline {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer-en {
  font-size: 9px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.18em;
}

.footer-nav {
  display: flex;
  gap: 60px;
  flex-shrink: 0;
}

.footer-nav-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.footer-nav a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

.footer-sep { opacity: 0.4; }

/* ============================================
   MOBILE BOTTOM CTA
   ============================================ */

.mobile-bottom-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 20px;
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  z-index: 50;
}

.btn-mobile-bottom {
  display: block;
  text-align: center;
  padding: 14px;
  background: var(--accent-cyan);
  color: var(--bg-0);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 100px;
  font-family: var(--font-sans);
}

/* ============================================
   MAGNETIC BUTTON EFFECT
   ============================================ */

.magnetic {
  position: relative;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .mouse-glow { display: none; }
}