/* ============================================
   ⌖ 一瓷一木 · 老譚 Renovation
   暖调材质质感风格 · 设计系统
   ============================================ */

/* 
 * 部分非关键视觉规则（间距/渐变/过渡效果）已同步至 js/css-inject.js，
 * JS 注入作为兜底增强。JS 禁用时网站仍可阅读，仅间距与颜色略有偏差。
 */
/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500&display=swap');

/* ===== CSS Variables ===== */
:root {
  /* --- 颜色 / Colors --- */
  --cream:        #FBF8F4;
  --warm-white:   #F5F0EB;
  --warm-beige:   #E8DDD3;
  --sand:         #D4C8BA;
  --bronze:       #C4A882;
  --warm-taupe:   #A69580;
  --warm-charcoal:#4A423C;
  --warm-dark:    #2E2824;

  --text-primary:   #4A423C;
  --text-secondary: #7A7066;
  --text-light:     #A89E95;
  --border:         #E0D8CF;

  /* --- 阴影 / Shadows --- */
  --shadow-sm: 0 2px 8px rgba(46,40,36,0.06);
  --shadow-md: 0 4px 20px rgba(46,40,36,0.08);
  --shadow-lg: 0 8px 40px rgba(46,40,36,0.10);

  /* --- 圆角 / Radius --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* --- 间距与布局 / Spacing & Layout --- */
  --section-gap: 5rem;
  --card-padding: 2rem;
  --grid-gap: 1.5rem;
  --max-width: 1200px;
  --header-height: 72px;

  /* --- 动效 / Transitions --- */
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  font-weight: 350;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--cream);
  overflow-x: hidden;
}

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

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--bronze);
}

ul {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: 'Noto Serif SC', serif;
  font-weight: 500;
  color: var(--warm-dark);
  line-height: 1.4;
}

h1 { font-size: 3rem; letter-spacing: 0.05em; }
h2 { font-size: 2.25rem; letter-spacing: 0.04em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--warm-taupe);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(251,248,244,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background var(--transition);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.3;
}

.brand-symbol {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--bronze);
  letter-spacing: 0;
  text-shadow: 0 1px 2px rgba(196,168,130,0.25);
  transition: color var(--transition);
}

.brand-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--warm-dark);
  letter-spacing: 0.14em;
  transition: color var(--transition);
}

.brand-sub {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.675rem;
  font-weight: 300;
  color: var(--warm-taupe);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1.5px;
  background: var(--bronze);
  transition: width var(--transition);
}

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

.nav-links a.active {
  color: var(--warm-charcoal);
}

/* --- Sections --- */
.section {
  padding: 6rem 2rem; /* [已迁移至 js/css-inject.js] */
}

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

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1rem;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 4rem) 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg,
    rgba(232,221,211,0.4) 0%,
    rgba(245,240,235,0.2) 40%,
    rgba(251,248,244,0.6) 70%,
    rgba(196,168,130,0.1) 100%
  );
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.hero-symbol {
  font-size: 3.5rem;
  color: var(--bronze);
  font-weight: 300;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 4rem;
  font-weight: 500;
  color: var(--warm-dark);
  letter-spacing: 0.05em;
  line-height: 1.45;
  margin-bottom: 1.75rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero-line1 {
  display: block;
}

.hero-line2 {
  display: block;
  font-size: 0.9em;
  margin-top: 0.15em;
}

.hero-accent {
  color: var(--bronze);
  position: relative;
  display: inline-block;
}

.hero-accent::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--bronze), rgba(196,168,130,0.2));
  border-radius: 1px;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  font-weight: 350;
  letter-spacing: 0.1em;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-line {
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, rgba(196,168,130,0.2), var(--bronze), rgba(196,168,130,0.2));
  margin: 0 auto 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s 0.7s forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--warm-dark);
  color: var(--cream);
}

.btn-primary:hover {
  background: var(--bronze);
  color: var(--cream);
}

.btn-outline {
  background: transparent;
  color: var(--warm-charcoal);
  border: 1.5px solid var(--sand);
}

.btn-outline:hover {
  border-color: var(--bronze);
  color: var(--bronze);
}

.btn-sm {
  padding: 0.55rem 1.5rem;
  font-size: 0.85rem;
}

/* --- Feature Cards --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  margin-top: 3rem;
}

.feature-card {
  text-align: center;
  padding: 2.5rem 2rem;
  background: var(--warm-white);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
  color: var(--bronze);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

/* --- Workflow --- */
.workflow {
  background: var(--warm-white);
}

.workflow-steps {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  position: relative;
}

.workflow-steps::before {
  content: '';
  position: absolute;
  top: 2.5rem;
  left: 3rem;
  right: 3rem;
  height: 1px;
  background: var(--border);
  z-index: 0;
}

.workflow-step {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.5rem;
  color: var(--bronze);
  font-weight: 500;
}

.workflow-step h4 {
  margin-bottom: 0.5rem;
}

.workflow-step p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Project Grid --- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.project-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-card-image {
  height: 320px;
  overflow: hidden;
  position: relative;
  background: var(--warm-beige);
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.project-card-body {
  padding: var(--card-padding);
}

.project-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--bronze);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.project-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-card p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* --- Stats --- */
.stats {
  background: var(--warm-dark);
  color: var(--cream);
  padding: 5rem 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 3rem;
  font-weight: 300;
  color: var(--bronze);
  display: block;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.about-text h2 {
  margin-bottom: 1.5rem;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.about-tag {
  padding: 0.4rem 1.25rem;
  background: var(--warm-white);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--warm-taupe);
}

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

.service-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: var(--card-padding);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  border-top: 3px solid transparent;
}

.service-card:hover {
  /* [已迁移至 js/css-inject.js] */
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-top-color: var(--bronze);
}

.service-icon {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  background: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 2rem;
  color: var(--bronze);
}

.service-card h3 {
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  background: var(--warm-white);
  padding: var(--section-gap) 2rem;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

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

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
}

.footer-brand .brand-symbol {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: 1rem;
  color: var(--text-light);
  line-height: 1.7;
}

.footer-links h4 {
  color: var(--cream);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.footer-links a {
  display: block;
  color: var(--text-light);
  font-size: 0.9rem;
  padding: 0.35rem 0;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--bronze);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 0.8rem;
}

/* --- Portfolio Page --- */
.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.6rem 1.75rem;
  border: 1.5px solid var(--border);
  background: transparent;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--bronze);
  color: var(--bronze);
  background: rgba(196,168,130,0.08);
}

.portfolio-masonry {
  columns: 2;
  column-gap: 2rem;
}

.portfolio-masonry .project-card {
  break-inside: avoid;
  margin-bottom: 2rem;
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-icon {
  font-size: 1.25rem;
  color: var(--bronze);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.contact-form {
  background: var(--warm-white);
  padding: 2.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--cream);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--bronze);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* --- Pill Buttons (radio/checkbox) --- */
.form-pill {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  cursor: pointer;
  background: var(--cream);
  padding: 0.45rem 1rem;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  transition: all var(--transition);
  user-select: none;
}
.form-pill:hover {
  border-color: var(--bronze);
  background: rgba(196,168,130,0.08);
}
.form-pill input[type="radio"],
.form-pill input[type="checkbox"] {
  accent-color: var(--bronze);
  width: auto;
  flex-shrink: 0;
}

/* --- Questionnaire Card --- */
.questionnaire-section {
  background: var(--cream);
  padding: 4rem 2rem;
}
.questionnaire-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}
.questionnaire-card .contact-grid {
  gap: 3rem;
}
.questionnaire-card .form-group:last-child {
  margin-bottom: 0;
}

/* --- Section Spacing (compact for multi-section pages) --- */
.section + .section {
  padding-top: var(--section-gap);
}

/* --- Page Hero --- */
.page-hero {
  padding: calc(var(--header-height) + 5rem) 2rem 4rem;
  text-align: center;
  background: linear-gradient(180deg,
    rgba(232,221,211,0.3) 0%,
    rgba(251,248,244,0) 100%
  );
}

.page-hero h1 {
  margin-bottom: 1rem;
}

.page-hero p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1rem;
}

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

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  .hero h1 { font-size: 2.5rem; }

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

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

  .workflow-steps {
    flex-direction: column;
    gap: 2rem;
  }

  .workflow-steps::before {
    display: none;
  }

  .portfolio-masonry {
    columns: 1;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(251,248,244,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1rem 2rem 2rem;
    gap: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
  }

  .menu-toggle {
    display: block;
  }

  section { padding: 3rem 1.25rem; }
  .section + .section { padding-top: 3rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  .project-card-image { height: 220px; }
  .btn { padding: 0.7rem 1.5rem; }
}

/* --- Page Content Area --- */
.page-content {
  padding: 3rem 2rem 6rem;
}

/* --- Surveying Detail --- */
.survey-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
}

.survey-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

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

.survey-list {
  margin-top: 1rem;
}

.survey-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.survey-list li::before {
  content: '•';
  color: var(--bronze);
  font-size: 1.2rem;
}

/* --- Feng Shui --- */
.fengshui-principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.principle-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
}

.principle-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--bronze);
}

.principle-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

.principle-card p {
  color: var(--text-secondary);
  font-size: 0.97rem;
}

/* Image placeholders (lazy load state) */
img[data-src] {
  opacity: 0;
  transition: opacity 0.5s;
}

img.loaded {
  opacity: 1;
}

/* --- Mobile Menu Toggle --- */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--warm-charcoal);
  cursor: pointer;
  padding: 0.5rem;
  line-height: 1;
}