/* ============================================================
   Liquid Morph — Zi Mu Network Technology Co., Ltd.
   Colors: Lavender #8B5CF6 | Peach #FB7185 | Mint #34D399
   ============================================================ */

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

:root {
  --bg: #FFFBFA;
  --surface: #FFFFFF;
  --alt: #FFF1F2;
  --text: #1F2937;
  --secondary: #6B7280;
  --muted: #9CA3AF;
  --lavender: #8B5CF6;
  --peach: #FB7185;
  --mint: #34D399;
  --blue-soft: #60A5FA;
  --dark: #1F2937;
  --dark-text: #FFFBFA;
  --dark-secondary: #D1D5DB;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 50px;
  --shadow: 0 4px 24px rgba(139,92,246,0.08);
  --shadow-hover: 0 12px 40px rgba(139,92,246,0.12);
  --transition: 0.35s cubic-bezier(0.25,0.8,0.25,1.2);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'DM Sans', 'Inter', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
}

h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

a { color: var(--lavender); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--peach); }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- HEADER / NAV ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,251,250,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139,92,246,0.08);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 24px rgba(139,92,246,0.08); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
}
.logo svg { width: 36px; height: 36px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-weight: 500;
  color: var(--secondary);
  transition: color var(--transition);
  font-size: 0.95rem;
}
.nav-links a:hover,
.nav-links a.active { color: var(--lavender); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 3px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 6rem 1.5rem 3rem;
}

.hero-blob {
  position: absolute;
  border-radius: 60% 40% 50% 50% / 45% 50% 40% 55%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
  animation: blobFloat 12s ease-in-out infinite alternate;
}
.hero-blob--lavender {
  width: 500px;
  height: 500px;
  background: var(--lavender);
  top: -8%;
  left: -5%;
  animation-delay: 0s;
  animation-duration: 14s;
}
.hero-blob--peach {
  width: 400px;
  height: 400px;
  background: var(--peach);
  top: 40%;
  right: -10%;
  animation-delay: -4s;
  animation-duration: 16s;
}
.hero-blob--mint {
  width: 350px;
  height: 350px;
  background: var(--mint);
  bottom: -10%;
  left: 30%;
  animation-delay: -8s;
  animation-duration: 13s;
}

@keyframes blobFloat {
  0%   { transform: translate(0,0) scale(1) rotate(0deg); }
  33%  { transform: translate(30px,-30px) scale(1.08) rotate(5deg); }
  66%  { transform: translate(-20px,15px) scale(0.94) rotate(-3deg); }
  100% { transform: translate(10px,-10px) scale(1.04) rotate(2deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  color: var(--text);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
.hero .tagline {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--secondary);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}
.hero .cta-btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--lavender), var(--peach));
  color: #FFFFFF;
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: var(--radius-xl);
  transition: transform var(--transition), box-shadow var(--transition);
}
.hero .cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(139,92,246,0.25);
  color: #FFFFFF;
}

/* ---------- SECTION COMMONS ---------- */
.section {
  padding: 6rem 1.5rem;
  position: relative;
}
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--lavender);
  margin-bottom: 0.75rem;
}
.section-title {
  margin-bottom: 1rem;
  color: var(--text);
}
.section-subtitle {
  color: var(--secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 600px;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Scroll fade-in */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- SERVICES ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
  position: relative;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.service-card--lavender::before { background: var(--lavender); }
.service-card--peach::before    { background: var(--peach); }
.service-card--mint::before     { background: var(--mint); }

.service-card .service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}
.service-card--lavender .service-icon { background: rgba(139,92,246,0.1); }
.service-card--peach .service-icon    { background: rgba(251,113,133,0.1); }
.service-card--mint .service-icon     { background: rgba(52,211,153,0.1); }

.service-card h3 { margin-bottom: 0.75rem; }
.service-card p  { color: var(--secondary); font-size: 0.95rem; }

/* ---------- ABOUT ---------- */
.about-quote-box {
  background: rgba(139,92,246,0.06);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}
.about-quote-box p {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 500;
  color: var(--lavender);
  font-style: italic;
  line-height: 1.4;
}
.about-narrative {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--secondary);
  line-height: 1.9;
}
.about-narrative p + p { margin-top: 1.5rem; }

.wave-divider {
  display: block;
  width: 120px;
  margin: 2.5rem auto;
}
.wave-divider path { stroke: var(--lavender); stroke-width: 3; fill: none; }

/* ---------- METRICS ---------- */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.metric-card {
  border-radius: var(--radius-xl);
  padding: 2.5rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.metric-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.metric-card--lavender { background: rgba(139,92,246,0.08); }
.metric-card--peach    { background: rgba(251,113,133,0.08); }
.metric-card--mint     { background: rgba(52,211,153,0.08); }
.metric-card--blue     { background: rgba(96,165,250,0.08); }

.metric-card .metric-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.metric-card--lavender .metric-number { color: var(--lavender); }
.metric-card--peach .metric-number    { color: var(--peach); }
.metric-card--mint .metric-number     { color: var(--mint); }
.metric-card--blue .metric-number     { color: var(--blue-soft); }

.metric-card .metric-label {
  font-size: 0.95rem;
  color: var(--secondary);
  font-weight: 500;
}

/* ---------- PROCESS ---------- */
.process-flow {
  position: relative;
  padding: 2rem 0;
}
.process-svg {
  display: block;
  width: 100%;
  max-width: 900px;
  margin: 0 auto 3rem;
}
.process-svg path.wavy-line {
  fill: none;
  stroke: var(--lavender);
  stroke-width: 3;
  stroke-dasharray: 8 4;
  opacity: 0.5;
}
.process-svg .droplet {
  fill: var(--lavender);
}
.process-svg .droplet--peach { fill: var(--peach); }
.process-svg .droplet--mint  { fill: var(--mint); }
.process-svg .droplet--blue  { fill: var(--blue-soft); }
.process-svg text.step-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  fill: #FFFFFF;
  text-anchor: middle;
}

.process-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}
.process-label {
  text-align: center;
}
.process-label h4 {
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.process-label p {
  font-size: 0.9rem;
  color: var(--secondary);
}

/* ---------- EXPERTISE ---------- */
.expertise-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}
.expertise-tag {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 0.95rem;
  color: #FFFFFF;
  transition: transform var(--transition);
}
.expertise-tag:hover { transform: scale(1.08); }
.expertise-tag--lavender { background: var(--lavender); }
.expertise-tag--peach    { background: var(--peach); }
.expertise-tag--mint     { background: var(--mint); }
.expertise-tag--blue     { background: var(--blue-soft); }
.expertise-tag--lg       { font-size: 1.15rem; padding: 0.85rem 2rem; }
.expertise-tag--sm       { font-size: 0.85rem; padding: 0.55rem 1.3rem; }

/* ---------- CTA ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--lavender), var(--peach));
  text-align: center;
  padding: 6rem 1.5rem;
}
.cta-section h2 {
  color: var(--dark-text);
  margin-bottom: 1rem;
}
.cta-section p {
  color: #E5E0DF;
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .cta-btn--outline {
  display: inline-block;
  padding: 1rem 2.5rem;
  border: 2px solid var(--dark-text);
  color: var(--dark-text);
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: var(--radius-xl);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.cta-section .cta-btn--outline:hover {
  background: var(--dark-text);
  color: var(--lavender);
  transform: translateY(-3px);
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--dark);
  color: var(--dark-text);
  padding: 4rem 1.5rem 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--lavender);
}
.footer-col p,
.footer-col li {
  font-size: 0.9rem;
  color: var(--dark-secondary);
  line-height: 1.8;
}
.footer-col ul { list-style: none; }
.footer-col a {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--dark-secondary);
  transition: background var(--transition), color var(--transition);
}
.footer-col a:hover {
  background: rgba(139,92,246,0.15);
  color: var(--lavender);
}

.footer-bottom {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,251,250,0.08);
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- PAGE: PRIVACY & TERMS ---------- */
.page-header {
  padding: 8rem 1.5rem 3rem;
  background: linear-gradient(180deg, rgba(139,92,246,0.04) 0%, var(--bg) 100%);
  text-align: center;
}
.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.5rem;
}
.page-header .page-date {
  font-size: 0.9rem;
  color: var(--muted);
}

.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

.sidebar-toc {
  position: sticky;
  top: 6rem;
  align-self: start;
}
.sidebar-toc h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--lavender);
  margin-bottom: 1rem;
}
.sidebar-toc ul { list-style: none; }
.sidebar-toc a {
  display: block;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--secondary);
  transition: background var(--transition), color var(--transition);
}
.sidebar-toc a:hover,
.sidebar-toc a.active-toc {
  background: rgba(139,92,246,0.08);
  color: var(--lavender);
}

.page-content section {
  margin-bottom: 3rem;
}
.page-content h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}
.page-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.page-content p {
  color: var(--secondary);
  line-height: 1.9;
  font-size: 1rem;
  margin-bottom: 1rem;
}
.page-content ul,
.page-content ol {
  color: var(--secondary);
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.page-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}
.page-content strong {
  color: var(--text);
  font-weight: 600;
}
.page-content address {
  font-style: normal;
  color: var(--secondary);
  line-height: 1.8;
}

/* ---------- SCROLL TO TOP ---------- */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--lavender);
  color: var(--dark-text);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-hover);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 900;
}
.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- COUNTER ANIMATION ---------- */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.counting { animation: countUp 0.5s ease forwards; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .services-grid,
  .metrics-row { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .page-layout { grid-template-columns: 1fr; }
  .sidebar-toc { position: static; margin-bottom: 2rem; }
  .sidebar-toc ul { display: flex; flex-wrap: wrap; gap: 0.25rem; }
  .process-labels { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 280px;
    background: var(--surface);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    gap: 1.5rem;
    box-shadow: -4px 0 24px rgba(0,0,0,0.08);
    transform: translateX(100%);
    transition: transform var(--transition);
  }
  .nav-links.open { transform: translateX(0); }
  .hamburger { display: flex; }
  .services-grid,
  .metrics-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .process-labels { grid-template-columns: 1fr; }
}