/* ============================================================
   DESIGN SYSTEM — Light Professional
   Clean white backgrounds, sky-blue accent, inspired by newHtml.
   ============================================================ */

:root {
  /* Background layers — warm white */
  --bg-base: #FEFCF9;
  --bg-elevated: #F5F3EE;
  --bg-surface: #EDEAE4;
  --bg-card: #FFFDFB;

  /* Text hierarchy */
  --text-primary: #1C1917;
  --text-secondary: #57534E;
  --text-tertiary: #A8A29E;

  /* Accent — soft warm beige */
  --accent: #C8ADA0;
  --accent-hover: #BB9E8F;
  --accent-light: #D4BEB2;
  --accent-soft: rgba(200, 173, 160, 0.12);

  /* Functional */
  --success: #16a34a;
  --danger: #dc2626;

  /* Borders */
  --border: #E7E2DB;
  --border-hover: #D6D0C7;

  /* Layout */
  --nav-height: 64px;
  --container: 1140px;
  --radius: 12px;
  --radius-sm: 8px;

  /* Typography — DM Serif Display (headings) + DM Sans (body) */
  --font-display: 'DM Serif Display', 'Noto Sans SC', 'PingFang SC', Georgia, serif;
  --font: 'DM Sans', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.2s;
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2 {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  line-height: 1.15;
  font-weight: 400;
}

h3, h4 {
  font-family: var(--font);
  letter-spacing: -0.015em;
  line-height: 1.25;
  font-weight: 600;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Sections ===== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: 2.6rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.75;
  font-weight: 300;
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

.reveal.visible [data-delay] { opacity: 1; transform: translateY(0); }
.reveal [data-delay] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-delay="0"] { transition-delay: 0s; }
[data-delay="1"] { transition-delay: 0.1s; }
[data-delay="2"] { transition-delay: 0.2s; }
[data-delay="3"] { transition-delay: 0.3s; }

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(254, 252, 249, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.nav-links { display: flex; gap: 28px; align-items: center; }

.nav-links a {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-tertiary);
  transition: color var(--duration) var(--ease);
  position: relative;
  padding-bottom: 3px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent-light);
  border-radius: 1px;
  transition: width 0.3s var(--ease);
}

.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: #1C1917;
  border-radius: 2px;
  transition: var(--duration) var(--ease);
}

.nav-hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
  background: var(--bg-base);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(200, 173, 160, 0.03) 0%, rgba(255, 255, 255, 0) 50%),
    url('https://images.unsplash.com/photo-1485827404703-89b55fcc595e?w=1920&q=80') center / cover no-repeat;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(254,252,249,0.95) 0%, rgba(254,252,249,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: rgba(200, 173, 160, 0.1);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 28px;
  letter-spacing: 0.01em;
  animation: fadeIn 0.8s var(--ease) forwards;
}

.hero-badge i { font-size: 0.72rem; }

.hero h1 {
  font-size: clamp(3rem, 6.5vw, 5.2rem);
  font-weight: 400;
  line-height: 1.08;
  margin-bottom: 26px;
  letter-spacing: -0.01em;
  animation: fadeInUp 0.8s var(--ease) 0.12s forwards;
  opacity: 0;
}

.text-accent {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-secondary);
  margin-bottom: 42px;
  line-height: 1.75;
  font-weight: 300;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s var(--ease) 0.24s forwards;
  opacity: 0;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* CTA Button */
.btn-cta {
  display: inline-block;
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: all var(--duration) var(--ease);
  animation: fadeInUp 0.8s var(--ease) 0.36s forwards;
  opacity: 0;
}

.btn-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px -8px rgba(200, 173, 160, 0.3);
}

.btn-cta:active { transform: translateY(0); }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2.5s ease infinite;
}

.scroll-indicator span {
  display: block;
  width: 20px;
  height: 34px;
  border: 1.5px solid #D6D0C7;
  border-radius: 10px;
  position: relative;
}

.scroll-indicator span::after {
  content: "";
  position: absolute;
  width: 2.5px;
  height: 6px;
  background: var(--accent-light);
  border-radius: 2px;
  top: 7px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollDot 2s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

@keyframes scrollDot {
  0% { opacity: 1; top: 7px; }
  100% { opacity: 0; top: 18px; }
}

/* ===== About ===== */
.about {
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.about-bg {
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1677442136019-21780ecad995?w=1200&q=80') center / cover no-repeat;
  opacity: 0.07;
}

.about-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 70% at 50% 50%, transparent, rgba(245,243,238,0.88) 75%),
    linear-gradient(180deg, rgba(245,243,238,0.92), transparent 15%, transparent 85%, rgba(245,243,238,0.92));
}

.about .container { position: relative; z-index: 2; }

.about-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat-item { text-align: center; }

.stat-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: -0.03em;
  filter: blur(4px);
  transition: filter 0.6s var(--ease);
}

.reveal.visible .stat-number { filter: blur(0); }

.stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 4px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ===== Services ===== */
.services {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}

.services-bg {
  position: absolute;
  inset: 0;
  background: url('../assets/services-bg.jpg') center / cover no-repeat;
  opacity: 0.1;
}

.services-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 70% at 50% 50%, transparent, rgba(254,252,249,0.85) 75%),
    linear-gradient(180deg, rgba(254,252,249,0.9), transparent 15%, transparent 85%, rgba(254,252,249,0.9));
}

.services .container { position: relative; z-index: 2; }

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.08);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent-light);
  font-size: 1.15rem;
}

.service-icon.icon-secondary {
  background: rgba(200, 173, 160, 0.12);
  color: var(--accent);
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.service-card > p {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 0.9rem;
}

.service-features {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.86rem;
}

.service-features li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ===== Process ===== */
.process {
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.process-bg {
  position: absolute;
  inset: 0;
  background: url('../assets/hero-bg-math.jpg') center / cover no-repeat;
  opacity: 0.08;
}

.process-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 70% at 50% 50%, transparent, rgba(245,243,238,0.88) 75%),
    linear-gradient(180deg, rgba(245,243,238,0.92), transparent 15%, transparent 85%, rgba(245,243,238,0.92));
}

.process .container { position: relative; z-index: 2; }

.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.process-timeline::before {
  content: "";
  position: absolute;
  top: 24px;
  left: calc(12.5% + 12px);
  right: calc(12.5% + 12px);
  height: 1px;
  background: var(--border);
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-tertiary);
  position: relative;
  z-index: 1;
  transition: all var(--duration) var(--ease);
}

.process-step:hover .step-number {
  border-color: var(--accent);
  color: var(--accent-light);
}

.step-icon {
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 1rem;
  transition: color var(--duration) var(--ease);
}

.process-step:hover .step-icon { color: var(--accent-light); }

.process-step h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Cases ===== */
.cases {
  background: var(--bg-base);
}

.cases-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(200, 173, 160, 0.04);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 500;
  transition: all var(--duration) var(--ease);
  font-family: inherit;
}

.tab-btn:hover {
  border-color: var(--accent-light);
  color: var(--accent);
  background: rgba(200, 173, 160, 0.08);
}

.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-primary);
  font-weight: 600;
}

.case-panel { display: none; }
.case-panel.active {
  display: block;
  animation: panelFadeIn 0.35s var(--ease) forwards;
}
.case-panel.fading-out {
  animation: panelFadeOut 0.22s var(--ease) forwards;
}

@keyframes panelFadeIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes panelFadeOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-8px); }
}

.case-header { margin-bottom: 20px; }

.case-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.case-header h3 i { color: var(--accent-light); font-size: 1rem; }
.case-header p { color: var(--text-secondary); font-size: 0.9rem; }

.case-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.case-cards.case-cards-quad { grid-template-columns: 1fr 1fr; }

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  cursor: pointer;
  transition: border-color var(--duration) var(--ease);
}

.case-card:hover { border-color: var(--border-hover); }

.case-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-icon {
  color: var(--accent-light);
  font-size: 0.9rem;
}

.case-detail { margin-bottom: 12px; }
.case-detail:last-child { margin-bottom: 0; }

.case-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
  display: block;
}

.case-label.pain   { color: var(--danger); }
.case-label.skill  { color: var(--accent-light); }
.case-label.result { color: var(--success); }

.case-detail p { color: var(--text-secondary); font-size: 0.86rem; line-height: 1.6; }

/* ===== Team ===== */
.team {
  background: var(--bg-elevated);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1280px;
  margin: 0 auto;
  align-items: stretch;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.team-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.08);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: var(--accent-soft);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  font-size: 1.4rem;
  overflow: hidden;
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.team-role {
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.team-tags {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 6px;
  margin-bottom: 18px;
}

.team-tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 100px;
  background: var(--accent-soft);
  color: var(--text-secondary);
  font-size: 0.68rem;
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.team-bio {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.team-bio-section {}

.team-bio-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 6px;
}

.team-bio p {
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.6;
  padding-left: 10px;
  border-left: 2px solid var(--border);
  margin-bottom: 5px;
}

.team-bio p:last-child {
  margin-bottom: 0;
}

/* ===== Pricing ===== */
.pricing {
  background: var(--bg-base);
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 840px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  cursor: pointer;
  position: relative;
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.pricing-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(200, 173, 160, 0.15);
}

.pricing-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(200, 173, 160, 0.04), var(--bg-card));
}

.pricing-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 14px;
  border-radius: 6px;
  background: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.pricing-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.pricing-subtitle {
  color: var(--text-secondary);
  font-size: 0.86rem;
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.pricing-price-note {
  color: var(--text-tertiary);
  font-size: 0.76rem;
  margin-bottom: 28px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.5;
}

.pricing-features li .check {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 3px;
  font-size: 0.7rem;
}

.btn-pricing {
  display: block;
  width: 100%;
  padding: 11px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  font-family: inherit;
}

.btn-pricing.btn-outline {
  background: rgba(200, 173, 160, 0.04);
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.btn-pricing.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200, 173, 160, 0.08);
}

.btn-pricing.btn-primary {
  background: var(--accent);
  border: none;
  color: var(--text-primary);
  font-weight: 600;
}

.btn-pricing.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(200, 173, 160, 0.25);
}

/* ===== Contact ===== */
.contact {
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.contact-bg {
  position: absolute;
  inset: 0;
  background: url('../assets/cases-bg.jpg') center / cover no-repeat;
  opacity: 0.12;
}

.contact-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 70% at 30% 50%, rgba(200, 173, 160, 0.04), transparent),
    linear-gradient(180deg, rgba(245,243,238,0.92), transparent 20%, transparent 80%, rgba(245,243,238,0.92));
}

.contact .container { position: relative; z-index: 2; }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.contact-left h2 {
  font-size: 2.2rem;
  font-weight: 400;
  margin-bottom: 16px;
}

.contact-left p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 420px;
}

.contact-cta {
  animation: none;
  opacity: 1;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  font-size: 1rem;
  flex-shrink: 0;
  transition: all var(--duration) var(--ease);
}

.contact-item:hover .contact-icon {
  border-color: var(--accent);
  background: rgba(200, 173, 160, 0.12);
}

.contact-info { display: flex; flex-direction: column; gap: 2px; }
.contact-info span { color: var(--text-tertiary); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.02em; }
.contact-info strong { color: var(--text-primary); font-weight: 600; font-size: 0.95rem; }

/* ===== Footer ===== */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  background: var(--bg-base);
}

.footer p { color: var(--text-tertiary); font-size: 0.76rem; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section-header h2 { font-size: 2rem; }
  .about-content { max-width: 100%; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .process-timeline::before { display: none; }
}

@media (max-width: 768px) {
  :root { --nav-height: 56px; }
  .section { padding: 80px 0; }

  .nav-hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: #FEFCF9;
    flex-direction: column;
    padding: 80px 28px 28px;
    gap: 18px;
    transition: right 0.25s var(--ease);
    border-left: 1px solid var(--border);
    box-shadow: -4px 0 20px rgba(0,0,0,0.08);
  }

  .nav-links.open { right: 0; }
  .nav-links a { font-size: 0.95rem; }
  .hero h1 { font-size: 2.4rem; }
  .hero-subtitle { font-size: 0.95rem; }
  .nav-links a::after { display: none; }
  .about-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .stat-number { font-size: 1.7rem; }
  .services-grid { grid-template-columns: 1fr; }
  .service-card { padding: 28px 24px; }
  .process-timeline { grid-template-columns: 1fr; gap: 24px; max-width: 340px; margin: 0 auto; }
  .case-cards { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .contact-inner { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .contact-left p { max-width: 100%; }
  .contact-left h2 { font-size: 1.6rem; }
  .section-header { margin-bottom: 44px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 0.9rem; }
  .btn-cta { padding: 12px 28px; font-size: 0.9rem; }
  .about-stats { grid-template-columns: 1fr; gap: 12px; }
  .cases-tabs { gap: 6px; }
  .tab-btn { padding: 7px 14px; font-size: 0.78rem; }
}

/* ===== Contact Modal ===== */
.contact-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(28, 25, 23, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.contact-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.contact-modal {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 40px 36px 36px;
  max-width: 440px;
  width: 90%;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.12);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s var(--ease);
}
.contact-modal-overlay.active .contact-modal {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-tertiary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}
.modal-close:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}
.contact-modal h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.modal-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 28px;
  line-height: 1.5;
}
.modal-methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.modal-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  text-decoration: none;
  color: inherit;
}
.modal-method:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(200, 173, 160, 0.15);
  background: var(--bg-card);
}
.modal-method-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent-hover);
  font-size: 1.1rem;
}
.modal-method-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.modal-method-label {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.modal-method-info strong {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
}
.modal-method-action {
  font-size: 0.8rem;
  color: var(--accent-hover);
  font-weight: 500;
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 6px;
  background: var(--accent-soft);
  transition: background 0.2s, color 0.2s;
}
.modal-method:hover .modal-method-action {
  background: var(--accent);
  color: var(--text-primary);
}
.modal-method-action.copied {
  background: #d4edda;
  color: #155724;
}

/* WeChat QR code in contact section */
.wechat-qr {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: 8px;
  margin-top: 6px;
  background: #fff;
  padding: 4px;
  border: 1px solid var(--border);
}
.contact-item-wechat {
  align-items: flex-start;
}

/* WeChat QR code in modal */
.modal-method-wechat {
  flex-wrap: wrap;
  gap: 12px;
  cursor: default;
}
.modal-method-wechat:hover {
  border-color: var(--border);
  box-shadow: none;
  background: var(--bg-elevated);
}
.modal-wechat-qr {
  width: 160px;
  height: 160px;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  padding: 6px;
  border: 1px solid var(--border);
  margin: 4px auto 0;
  display: block;
}
.modal-wechat-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .contact-modal {
    padding: 32px 24px 28px;
  }
  .modal-method {
    padding: 14px 14px;
    gap: 12px;
  }
  .modal-method-icon {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .reveal [data-delay] { opacity: 1; transform: none; }
  .stat-number { filter: none; }
}