/* ===== Variables ===== */
:root {
  --color-bg: #faf9f7;
  --color-bg-dark: #1a1a1a;
  --color-bg-card: #ffffff;
  --color-text: #2c2c2c;
  --color-text-light: #6b6b6b;
  --color-text-muted: #999;
  --color-accent: #F0B429;
  --color-accent-dark: #D49A10;
  --color-accent-text: #FFD666;
  --color-border: #e8e4df;
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', sans-serif;
  --header-height: 72px;
  --container-width: 1200px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

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

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

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

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--color-bg-dark);
  color: #e8e4df;
}

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

.section-dark .section-title {
  color: #fff;
}

.section-dark .section-desc {
  color: #999;
}

.section-header {
  margin-bottom: 56px;
}

.section-header.center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 480px;
}

.section-header.center .section-desc {
  margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: 2px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.btn-full {
  width: 100%;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(250, 249, 247, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header.scrolled .logo-text,
.header.scrolled .nav-links a {
  color: var(--color-text);
}

.header.scrolled .logo-mark {
  color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.header.scrolled .nav-links a:hover,
.header.scrolled .nav-links a.active {
  color: var(--color-accent-dark);
}

.header.scrolled .menu-toggle span {
  background: var(--color-text);
}

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

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

.logo-mark {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-accent-text);
  border: 1.5px solid var(--color-accent-text);
  padding: 4px 10px;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  transition: var(--transition);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.85);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav-cta {
  padding: 8px 20px !important;
  border: 1px solid rgba(255, 255, 255, 0.4) !important;
  border-radius: 2px;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--color-accent) !important;
  border-color: var(--color-accent) !important;
  color: #fff !important;
}

.header.scrolled .nav-cta {
  border-color: var(--color-accent) !important;
  color: var(--color-accent) !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-image {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(26, 26, 26, 0.55) 0%, rgba(26, 26, 26, 0.3) 50%, rgba(26, 26, 26, 0.65) 100%),
    url('https://images.unsplash.com/photo-1618221195710-e6a0a656a0d9?w=1920&q=80') center/cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, transparent 0%, rgba(26, 26, 26, 0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: var(--header-height);
  padding-bottom: 48px;
  max-width: 800px;
}

.hero-tag {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent-text);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

.hero-stats {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px 32px;
  opacity: 0;
  animation: fadeUp 0.8s 1s forwards;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.stat-num.stat-text {
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.stat-suffix {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-accent-text);
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.15);
}

.hero-scroll {
  position: absolute;
  bottom: 48px;
  right: 40px;
  left: auto;
  transform: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  opacity: 0;
  animation: fadeUp 0.8s 1.2s forwards;
  pointer-events: none;
}

.hero-scroll span {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.4);
  writing-mode: vertical-rl;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-image-main {
  width: 85%;
  aspect-ratio: 3/4;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.about-image-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about-badge {
  position: absolute;
  top: 40px;
  right: -20px;
  background: var(--color-bg-dark);
  color: #fff;
  padding: 20px 24px;
  text-align: center;
}

.badge-year {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-text);
  line-height: 1;
}

.badge-text {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  margin-top: 4px;
  display: block;
}

.about-text {
  color: var(--color-text-light);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.about-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.about-highlights {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-highlights li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.highlight-icon {
  color: var(--color-accent-dark);
  font-size: 0.65rem;
  margin-top: 8px;
}

.about-highlights strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.about-highlights span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 40px 32px;
  border-radius: 2px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(184, 149, 106, 0.3);
  transform: translateY(-4px);
}

.service-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.04);
  position: absolute;
  top: 16px;
  right: 20px;
  line-height: 1;
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.85rem;
  color: #999;
  line-height: 1.7;
}

/* ===== Portfolio ===== */
.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-text-light);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-bg-dark);
  color: #fff;
  border-color: var(--color-bg-dark);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.portfolio-item {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
}

.portfolio-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.portfolio-item.hidden {
  display: none;
}

.portfolio-image {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    hsl(var(--img-hue, 30), 15%, 75%);
  transition: transform 0.6s ease;
}

.portfolio-item:nth-child(1) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('成都麓湖/1.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(2) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('641 南京瑞玺/230539hmuioktpvmidicfj.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(3) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('噶陀寺/001.png');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(4) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('日月峡/日月峡/01.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(5) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('4酒店/1/13.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(6) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('肇东医院/肇东第一医院施工落地方案设计2022-1-20_00.png');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(7) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('小酒馆/1.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(8) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('3餐饮/1.jpeg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:nth-child(9) .portfolio-image {
  background-image:
    linear-gradient(180deg, transparent 40%, rgba(26, 26, 26, 0.85) 100%),
    url('大理民宿/1.jpg');
  background-size: cover;
  background-position: center;
}

.portfolio-item:hover .portfolio-image {
  transform: scale(1.05);
}

.portfolio-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px 24px;
  z-index: 2;
}

.portfolio-region {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: 8px;
}

.portfolio-overlay h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.portfolio-overlay p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
}

.portfolio-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.7rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  color: #fff;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.portfolio-view {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--color-accent-text);
  letter-spacing: 0.05em;
  opacity: 0;
  transform: translateY(8px);
  transition: var(--transition);
}

.portfolio-link:hover .portfolio-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Process ===== */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  position: relative;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

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

.step-marker {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid rgba(184, 149, 106, 0.4);
  border-radius: 50%;
  background: var(--color-bg-dark);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.process-step:hover .step-marker {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.process-step h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.8rem;
  color: #777;
  line-height: 1.6;
  padding: 0 8px;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-desc {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 40px;
  max-width: 400px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

a.contact-item:hover {
  transform: translateX(4px);
}

a.contact-item:hover .contact-value {
  color: var(--color-accent);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.contact-value {
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.contact-social span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 12px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  padding: 8px 16px;
  font-size: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-text-light);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--color-bg-dark);
  color: #fff;
  border-color: var(--color-bg-dark);
}

.contact-form {
  background: var(--color-bg-card);
  padding: 40px;
  border-radius: 2px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
}

.contact-form h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 28px;
}

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  background: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(184, 149, 106, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form-status {
  font-size: 0.85rem;
  text-align: center;
  margin-top: 12px;
  min-height: 1.2em;
}

.form-status--success {
  color: #4a9a6a;
}

.form-status--error {
  color: #c45c4a;
}

.form-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 16px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

.footer-brand .logo-mark {
  font-size: 0.85rem;
  padding: 2px 8px;
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
}

.footer-copy a {
  color: var(--color-accent-text);
  transition: var(--transition);
}

.footer-copy a:hover {
  color: #fff;
}

/* ===== Scroll Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
  }

  .process-timeline::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg-dark);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: var(--transition);
    padding: 40px;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
  }

  .menu-toggle {
    display: flex;
    z-index: 1001;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-image-main {
    width: 100%;
  }

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

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

  .process-timeline {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-stats {
    gap: 16px 20px;
    max-width: calc(100% - 48px);
  }

  .hero-scroll {
    right: 16px;
    bottom: 32px;
  }

  .stat-num {
    font-size: 1.5rem;
  }

  .stat-num.stat-text {
    font-size: 1.05rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .contact-form {
    padding: 28px 20px;
  }
}

/* ===== Case Detail Page ===== */
.case-page .header .logo-text {
  color: var(--color-text);
}

.case-back-link {
  font-size: 0.85rem;
  color: var(--color-text-light);
  transition: var(--transition);
}

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

.case-main {
  padding-top: var(--header-height);
}

.case-hero {
  padding: 60px 0 20px;
  background: var(--color-bg);
}

.case-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.case-meta span {
  font-size: 0.85rem;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-text-light);
}

.case-intro {
  max-width: 640px;
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

.case-cover {
  width: 100%;
  max-height: 70vh;
  overflow: hidden;
}

.case-cover img {
  width: 100%;
  height: 70vh;
  object-fit: cover;
  display: block;
}

.case-cover.cover-crop-top {
  display: flex;
  align-items: flex-end;
}

.cover-crop-top img {
  width: 100%;
  height: auto;
  transform: scale(1.25);
  transform-origin: center bottom;
}

.case-gallery-header {
  margin-bottom: 32px;
}

.case-gallery {
  padding-top: 40px;
}

.case-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.case-gallery-item {
  margin: 0;
  overflow: hidden;
  border-radius: 2px;
  cursor: zoom-in;
  background: var(--color-border);
}

.case-gallery-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.case-gallery-item:hover img {
  transform: scale(1.03);
}

.case-cta {
  background: var(--color-bg-dark);
  color: #e8e4df;
}

.case-cta-inner {
  text-align: center;
}

.case-cta h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  color: #fff;
  margin-bottom: 12px;
}

.case-cta p {
  color: #999;
  margin-bottom: 28px;
}

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

.btn-outline-dark {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-dark:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox-close {
  top: 24px;
  right: 24px;
}

.lightbox-prev {
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

@media (max-width: 768px) {
  .case-gallery-grid {
    grid-template-columns: 1fr;
  }

  .lightbox-prev {
    left: 12px;
  }

  .lightbox-next {
    right: 12px;
  }
}