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

:root {
  --bg-primary: #faf8f5;
  --bg-secondary: #f3efe8;
  --bg-card: #ffffff;
  --text-primary: #2c2416;
  --text-secondary: #6b5e4a;
  --text-muted: #9b8e7a;
  --accent: #c49a6c;
  --accent-light: #d4b896;
  --accent-dark: #a0784c;
  --border: #e5ddd2;
  --border-light: #f0ebe0;
  --shadow-sm: 0 1px 3px rgba(44, 36, 22, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 36, 22, 0.08);
  --shadow-lg: 0 12px 40px rgba(44, 36, 22, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --nav-width: 260px;
  --trigger-width: 18px;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-dock: cubic-bezier(0.05, 0.6, 0.15, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* === Side Navigation === */
.nav-trigger {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--trigger-width);
  height: 100vh;
  z-index: 1000;
  cursor: pointer;
}

.nav-overlay {
  position: fixed;
  left: var(--nav-width);
  top: 0;
  width: calc(var(--nav-width) / 3);
  height: 100vh;
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.1s, visibility 0.1s;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.side-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--nav-width);
  height: 100vh;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-light);
  z-index: 999;
  display: flex;
  flex-direction: column;
  padding: 0;
  transform: translateX(-100%);
  transition: transform 1.3s var(--ease-dock);
  box-shadow: var(--shadow-lg);
}

.side-nav.active {
  transform: translateX(0);
}

.nav-header {
  padding: 32px 28px 24px;
  border-bottom: 1px solid var(--border-light);
}

.nav-logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: -0.02em;
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  flex: 1;
  list-style: none;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-links li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: #2d2d2d;
  transition: all 0.25s ease;
  position: relative;
}

.nav-links li a:hover {
  background: var(--bg-secondary);
  color: #000;
}

.nav-links li a.active {
  background: var(--bg-secondary);
  color: var(--accent-dark);
  font-weight: 600;
}

.nav-links li a .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0.7;
}

.nav-footer {
  padding: 20px 28px;
  border-top: 1px solid var(--border-light);
  font-size: 0.8rem;
  color: #5a5a5a;
}

/* === Main Content === */
.main-content {
  min-height: 100vh;
  padding-left: var(--trigger-width);
}

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

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-secondary);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--accent-dark);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.04em;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  max-width: 800px;
  margin-bottom: 24px;
}

.hero h1 span {
  color: var(--accent);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 48px;
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(196, 154, 108, 0.35);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(196, 154, 108, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  background: rgba(196, 154, 108, 0.05);
}

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

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

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--bg-secondary);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent-dark);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* === Work Card === */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
  max-width: 1280px;
  margin: 0 auto;
}

.work-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 0.4s var(--transition-smooth);
  cursor: pointer;
  display: block;
}

.work-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.work-card-image {
  aspect-ratio: 16 / 10;
  background: var(--bg-secondary);
  overflow: hidden;
  position: relative;
}

.work-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--transition-smooth);
}

.work-card:hover .work-card-image img {
  transform: scale(1.04);
}

.work-card-body {
  padding: 24px 28px 28px;
}

.work-card-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--bg-secondary);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--accent-dark);
  font-weight: 500;
  margin-bottom: 12px;
}

.work-card-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.work-card-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === Detail Page Layout === */
.detail-hero {
  padding: 60px 40px 40px;
  max-width: 1280px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.25s;
  margin-bottom: 32px;
}

.back-link:hover {
  color: var(--accent-dark);
}

.detail-layout {
  display: flex;
  gap: 60px;
  align-items: flex-start;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px 100px;
}

.detail-image-side {
  flex: 1;
  position: sticky;
  top: 40px;
}

.detail-image-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: all 0.4s ease;
}

.detail-image-wrapper:hover {
  box-shadow: var(--shadow-lg);
}

.detail-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-image-hint {
  text-align: center;
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.detail-text-side {
  flex: 0 0 480px;
  max-width: 480px;
}

.detail-text-side h1 {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.detail-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.detail-tag {
  padding: 4px 12px;
  background: var(--bg-secondary);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent-dark);
  font-weight: 500;
}

.detail-block {
  margin-bottom: 36px;
}

.detail-block h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-block h3 .block-icon {
  color: var(--accent);
}

.detail-block p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.detail-cta {
  margin-top: 40px;
}

/* === Apple-style Fullscreen Overlay (图片点击放大) === */
.image-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s var(--transition-smooth);
}

.image-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.image-overlay-bg {
  position: absolute;
  inset: 0;
  background: rgba(250, 248, 245, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.image-overlay-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform-origin: center center;
}

.image-overlay-content img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.image-overlay-close {
  position: absolute;
  top: 24px;
  right: 32px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s;
  box-shadow: var(--shadow-sm);
}

.image-overlay-close:hover {
  background: var(--bg-secondary);
  transform: scale(1.05);
}

/* === Demo Simulation Panel === */
.demo-panel {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s var(--transition-smooth);
}

.demo-panel.active {
  opacity: 1;
  pointer-events: auto;
}

.demo-bg {
  position: absolute;
  inset: 0;
  background: rgba(250, 248, 245, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.demo-container {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 700px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  text-align: center;
  max-height: 85vh;
  overflow-y: auto;
}

.demo-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s;
}

.demo-close:hover {
  background: var(--border);
}

.demo-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.8rem;
}

.demo-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.demo-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.demo-progress {
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 28px;
}

.demo-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-light), var(--accent));
  border-radius: 2px;
  width: 0%;
  transition: width 0.6s ease;
}

.demo-steps {
  text-align: left;
  margin-bottom: 28px;
}

.demo-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.4s;
}

.demo-step:last-child {
  border-bottom: none;
}

.demo-step-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  transition: all 0.4s;
}

.demo-step.done .demo-step-icon {
  background: var(--accent);
  color: #fff;
}

.demo-step.active .demo-step-icon {
  background: var(--accent-dark);
  color: #fff;
}

.demo-step.done {
  color: var(--text-muted);
}

.demo-step.active {
  color: var(--text-primary);
  font-weight: 500;
}

.demo-result {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 8px;
  text-align: left;
}

.demo-result h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-dark);
  margin-bottom: 12px;
}

.demo-result-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  white-space: pre-wrap;
}

.demo-result-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.demo-result-badge.success {
  background: #e8f5e9;
  color: #2e7d32;
}

/* === About Page === */
.about-hero {
  padding: 80px 40px 60px;
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.about-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px 100px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.35s ease;
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

.value-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.value-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Contact Page === */
.contact-hero {
  padding: 80px 40px 60px;
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.contact-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.contact-hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.8;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 40px 100px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.3s ease;
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-card-text h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.contact-card-text p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color 0.25s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

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

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

/* === Login Modal === */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: rgba(44, 36, 22, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--transition-smooth), visibility 0.35s;
}

.login-overlay.active {
  opacity: 1;
  visibility: visible;
}

.login-modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 48px 40px 40px;
  width: 420px;
  max-width: 92vw;
  box-shadow: var(--shadow-lg);
  position: relative;
  text-align: center;
  transform: translateY(12px) scale(0.97);
  transition: transform 0.4s var(--transition-smooth);
}

.login-overlay.active .login-modal {
  transform: translateY(0) scale(1);
}

.login-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s;
}

.login-close:hover {
  background: var(--border);
}

.login-modal .login-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
}

.login-modal h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.login-modal .login-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.login-field {
  text-align: left;
  margin-bottom: 20px;
}

.login-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.login-field input {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color 0.25s;
  outline: none;
  letter-spacing: 0.02em;
}

.login-field input:focus {
  border-color: var(--accent);
}

.login-field input::placeholder {
  color: #c4bdaa;
}

.login-sms-row {
  display: flex;
  gap: 12px;
}

.login-sms-row input {
  flex: 1;
}

.btn-sms {
  flex-shrink: 0;
  padding: 13px 20px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
  font-family: inherit;
}

.btn-sms:hover {
  background: rgba(196, 154, 108, 0.08);
}

.btn-sms.counting {
  border-color: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
  background: var(--bg-secondary);
}

.btn-login-submit {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: all 0.3s;
  font-family: inherit;
  margin-top: 8px;
}

.btn-login-submit:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 16px rgba(196, 154, 108, 0.35);
}

.login-agreement {
  margin-top: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.login-agreement a {
  color: var(--accent-dark);
  text-decoration: underline;
}

/* Nav login button */
.nav-login {
  padding: 16px 28px;
  border-top: 1px solid var(--border-light);
}

.nav-login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.25s;
}

.nav-login-btn:hover {
  background: rgba(196, 154, 108, 0.08);
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.7s var(--transition-smooth) both;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* === Responsive === */
@media (max-width: 900px) {
  :root {
    --nav-width: 240px;
  }

  .side-nav {
    width: var(--nav-width);
  }

  .hero {
    padding: 60px 24px;
  }

  .section {
    padding: 60px 24px;
  }

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

  .detail-layout {
    flex-direction: column;
    gap: 32px;
    padding: 0 24px 60px;
  }

  .detail-text-side {
    flex: none;
    max-width: 100%;
  }

  .detail-image-side {
    position: static;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    padding: 0 24px 60px;
  }

  .about-values {
    grid-template-columns: 1fr;
    padding: 0 24px 60px;
  }
}