/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --bg-card: #1a1a1e;
  --bg-card-hover: #1f1f23;
  --border: #27272a;
  --border-light: #3f3f46;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-dim: rgba(59, 130, 246, 0.15);
  --green: #22c55e;
  --orange: #f97316;
  --red: #ef4444;
  --yellow: #eab308;
  --tag-bg: rgba(59, 130, 246, 0.1);
  --tag-border: rgba(59, 130, 246, 0.3);
  --section-dark-bg: #0f0f11;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-w: 860px;
  --nav-h: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

::selection {
  background: var(--accent-dim);
  color: var(--text-primary);
}

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ===========================
   Navigation
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: calc(var(--max-w) + 80px);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: color 0.2s;
}
.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 99;
  flex-direction: column;
  padding: 16px 24px;
  gap: 4px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s;
}

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

.mobile-link {
  display: block;
  padding: 10px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-link:last-child {
  border-bottom: none;
}
.mobile-link:hover {
  color: var(--text-primary);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-h) + 40px) 40px 80px;
  position: relative;
  text-align: center;
}

.hero-inner {
  max-width: 700px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.hero-avatar {
  flex-shrink: 0;
}

.avatar-placeholder {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 2px dashed var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  opacity: 0.9;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.hero-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
}
.btn-secondary:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
  background: var(--bg-card);
}

/* 📂 项目索引 */
.project-index {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.index-link {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 18px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s;
}
.index-link:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
  background: var(--bg-card);
  transform: translateY(-1px);
}
.index-link-icon {
  font-size: 1rem;
  line-height: 1;
}
.index-link-sub {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 400;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.3;
}
.hero-scroll-hint span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
  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; }
}

/* ===========================
   Sections
   =========================== */
.section {
  padding: 100px 40px;
}

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

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 48px;
  color: var(--text-primary);
}

/* ===========================
   Project Cards
   =========================== */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.project-card:hover {
  border-color: var(--border-light);
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.project-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.project-badge.deep {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.project-name {
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.project-chevron {
  color: var(--text-muted);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.project-card.open .project-chevron {
  transform: rotate(180deg);
}

.project-body {
  display: none;
  padding: 0 24px 24px;
  border-top: 1px solid var(--border);
}
.project-card.open .project-body {
  display: block;
}

.project-part {
  padding-top: 20px;
}

.part-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.part-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.part-list {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.part-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.scheme {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  border-left: 3px solid;
}
.scheme.chosen {
  background: rgba(34, 197, 94, 0.06);
  border-color: var(--green);
}
.scheme.rejected {
  background: rgba(239, 68, 68, 0.06);
  border-color: var(--red);
}
.scheme-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
}
.chosen .scheme-label {
  color: var(--green);
}
.rejected .scheme-label {
  color: var(--red);
}
.scheme strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.scheme-pros {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.scheme-pros li {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.scheme-reason {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 4px;
}

.result-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.result-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}
.result-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}
.result-list strong {
  color: var(--green);
  font-weight: 600;
}

/* Simple Projects */
.simple-projects {
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.simple-project-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.simple-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.simple-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.9rem;
}

.simple-name {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  font-size: 0.85rem;
}

.simple-desc {
  color: var(--text-secondary);
}

/* ===========================
   Metrics Grid
   =========================== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.metric-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}
.metric-card.highlight {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.05);
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.metric-big {
  font-size: 2rem;
  color: var(--accent);
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===========================
   Case Studies
   =========================== */
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 24px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.case-card:hover {
  border-color: var(--border-light);
}

.case-header {
  padding: 24px 24px 0;
}

.case-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  background: rgba(234, 179, 8, 0.12);
  color: var(--yellow);
  border-radius: var(--radius-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
  display: inline-block;
  margin-bottom: 8px;
}

.case-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.case-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.case-part .part-label {
  margin-bottom: 8px;
}

.case-result {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.case-outcome {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.outcome-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.case-outcome p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.case-review {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.review-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  margin-bottom: 4px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.review-tag.good {
  background: rgba(34, 197, 94, 0.12);
  color: var(--green);
}
.review-tag.bad {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
}
.review-tag.action {
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent);
}

.review-good, .review-bad, .review-action {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 12px;
  border-left: 2px solid var(--border);
}

/* ===========================
   Reliability
   =========================== */
.reliability-block {
  margin-bottom: 40px;
}
.reliability-block:last-child {
  margin-bottom: 0;
}

.block-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.incident-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.incident-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  font-size: 0.9rem;
}

.incident-time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 2px;
}

.incident-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.incident-root {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* ===========================
   Technical Influence
   =========================== */
.influence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.influence-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.influence-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.influence-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.influence-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 4px;
}

.influence-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===========================
   Writing
   =========================== */
.writing-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.writing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.writing-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.writing-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  margin-bottom: 10px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.writing-tag踩坑 {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
}
.writing-tag方案 {
  background: rgba(234, 179, 8, 0.12);
  color: var(--yellow);
}

.writing-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.writing-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.writing-link {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  transition: opacity 0.2s;
}
.writing-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* ===========================
   About
   =========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.about-block {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.philosophy-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.philosophy-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}
.philosophy-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}

.workflow-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.workflow-step {
  padding: 6px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.workflow-arrow {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.cap-tag {
  padding: 6px 14px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===========================
   Contact
   =========================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.contact-icon {
  font-size: 1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.contact-label {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 48px;
  flex-shrink: 0;
  font-family: var(--font-mono);
}

.contact-value {
  color: var(--text-secondary);
}

.contact-link {
  color: var(--accent);
  transition: opacity 0.2s;
}
.contact-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.contact-entry {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.entry-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.entry-tag {
  padding: 4px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.entry-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===========================
   Footer
   =========================== */
.footer {
  padding: 40px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-back {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-back:hover {
  color: var(--text-primary);
}

/* ===========================
   Animations & Utilities
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  :root {
    --nav-h: 56px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 60px 20px;
  }

  .hero {
    padding: calc(var(--nav-h) + 24px) 20px 60px;
  }

  .hero-scroll-hint {
    display: none;
  }

  .metrics-grid {
    grid-template-columns: 1fr 1fr;
  }

  .influence-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .project-header {
    padding: 16px 20px;
  }

  .project-body {
    padding: 0 20px 20px;
  }

  .case-header {
    padding: 20px 20px 0;
  }

  .case-body {
    padding: 16px 20px 20px;
  }

  .about-block {
    padding: 20px;
  }

  .workflow-steps {
    gap: 6px;
  }

  .workflow-step {
    font-size: 0.8rem;
    padding: 5px 10px;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-tags {
    gap: 6px;
  }

  .tag {
    font-size: 0.75rem;
    padding: 3px 10px;
  }
}