/* ============================================
   港至抵設計工程有限公司 - 網站樣式
   修改提示: 顏色、字體、間距都在 :root 變數中，
   只需改變數值即可全站更新
   ============================================ */

/* ---------- 全域變數（容易修改） ---------- */
:root {
  /* 品牌主色 */
  --color-primary: #F57C00;        /* 品牌橙色 */
  --color-primary-dark: #E65100;   /* 深橙色 */
  --color-primary-light: #FFB74D;  /* 淺橙色 */
  --color-accent: #FF8F00;         /* 強調橙色 */

  /* 中性色 */
  --color-dark: #1A1A1A;           /* 最深文字 */
  --color-gray-900: #2D2D2D;       /* 深灰 */
  --color-gray-700: #555555;       /* 中深灰 */
  --color-gray-500: #888888;       /* 中灰 */
  --color-gray-300: #CCCCCC;       /* 淺灰邊框 */
  --color-gray-100: #F5F5F5;       /* 極淺灰背景 */
  --color-gray-50: #FAFAFA;        /* 最淺背景 */
  --color-white: #FFFFFF;

  /* 字體 */
  --font-sans: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --font-serif: 'Noto Serif TC', 'Songti TC', serif;

  /* 間距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 8rem;

  /* 容器 */
  --container-max: 1200px;
  --container-narrow: 900px;

  /* 圓角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* 陰影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-orange: 0 4px 20px rgba(245,124,0,0.25);

  /* 動畫 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s ease;
  --transition-slow: 0.6s ease;
}

/* ---------- 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-gray-900);
  line-height: 1.7;
  background: var(--color-white);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---------- 區段通用 ---------- */
section {
  padding: var(--space-xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(245,124,0,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-dark {
  background: var(--color-dark);
  color: var(--color-white);
}

.btn-dark:hover {
  background: var(--color-gray-900);
  transform: translateY(-2px);
}

/* ============================================
   導航欄
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-dark);
}

.nav-logo img {
  height: 44px;
  width: auto;
}

.nav-logo span {
  line-height: 1.2;
}

.nav-logo small {
  display: block;
  font-size: 0.65rem;
  color: var(--color-gray-500);
  font-weight: 400;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.nav-menu a {
  padding: 0.5rem 0.9rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: rgba(245,124,0,0.06);
}

.nav-cta {
  margin-left: 0.5rem;
}

.nav-cta .btn {
  padding: 0.55rem 1.4rem;
  font-size: 0.88rem;
}

/* 手機選單按鈕 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: all var(--transition-fast);
}

/* ============================================
   Hero 首屏
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero/hero-main.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.75) 0%, rgba(26,26,26,0.45) 50%, rgba(245,124,0,0.25) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  color: var(--color-white);
  width: 100%;
}

.hero-tag {
  display: inline-block;
  padding: 0.4rem 1.2rem;
  background: rgba(245,124,0,0.9);
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
  letter-spacing: 2px;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  max-width: 700px;
}

.hero h1 .highlight {
  color: var(--color-primary-light);
}

.hero p {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  max-width: 550px;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  flex-wrap: wrap;
}

.hero-stat h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary-light);
}

.hero-stat p {
  font-size: 0.9rem;
  opacity: 0.8;
  margin: 0;
}

/* 向下滾動提示 */
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--color-white);
  font-size: 0.8rem;
  text-align: center;
  animation: bounce 2s infinite;
}

.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 30px;
  background: var(--color-white);
  margin: 0.5rem auto 0;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   關於我們
   ============================================ */
.about {
  background: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  color: var(--color-dark);
}

.about-text p {
  color: var(--color-gray-700);
  margin-bottom: var(--space-sm);
  font-size: 1.02rem;
}

.about-philosophy {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: var(--color-gray-50);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.about-philosophy strong {
  color: var(--color-primary-dark);
  font-size: 1.1rem;
}

/* 五大價值卡片 */
.values-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.value-card {
  text-align: center;
  padding: var(--space-md) var(--space-sm);
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.value-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.value-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto var(--space-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.3rem;
  font-weight: 800;
}

.value-card h4 {
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: 0.3rem;
}

.value-card p {
  font-size: 0.82rem;
  color: var(--color-gray-500);
  line-height: 1.5;
}

/* ============================================
   最新資訊
   ============================================ */
.news {
  background: var(--color-gray-50);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.news-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.news-image {
  height: 200px;
  background: var(--color-gray-100);
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-card:hover .news-image img {
  transform: scale(1.05);
}

.news-body {
  padding: var(--space-md);
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.news-card h3 {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.news-card p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  line-height: 1.6;
}

.news-more {
  text-align: center;
  margin-top: var(--space-lg);
}

/* ============================================
   工程範例
   ============================================ */
.projects {
  background: var(--color-white);
}

.project-filter {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.3rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-700);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.project-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,26,26,0.85) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  color: var(--color-white);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-style {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  background: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 0.5rem;
  width: fit-content;
}

.project-overlay h3 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
}

.project-overlay p {
  font-size: 0.85rem;
  opacity: 0.85;
}

/* 照片數量標籤 */
.project-photo-count {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  padding: 0.3rem 0.7rem;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  color: var(--color-white);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  z-index: 2;
  transition: opacity var(--transition-normal);
}

.project-card:hover .project-photo-count {
  opacity: 0;
}

/* ============================================
   訂造傢俬
   ============================================ */
.furniture {
  background: var(--color-gray-50);
}

.furniture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.furniture-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.furniture-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.furniture-image {
  height: 180px;
  overflow: hidden;
}

.furniture-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.furniture-card:hover .furniture-image img {
  transform: scale(1.06);
}

.furniture-body {
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.furniture-body h3 {
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: 0.3rem;
}

.furniture-body p {
  font-size: 0.85rem;
  color: var(--color-gray-500);
}

/* ============================================
   住家裝修
   ============================================ */
.renovation {
  background: var(--color-white);
}

.renovation-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-lg);
  color: var(--color-gray-700);
  font-size: 1.05rem;
}

.renovation-services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.service-item {
  padding: var(--space-md);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-normal);
}

.service-item:hover {
  border-color: var(--color-primary-light);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
}

.service-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
}

.service-item h3 {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.service-item p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  line-height: 1.6;
}

.service-item ul {
  margin-top: 0.5rem;
}

.service-item ul li {
  font-size: 0.85rem;
  color: var(--color-gray-700);
  padding: 0.2rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.service-item ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* 裝修流程 */
.process-section {
  margin-top: var(--space-lg);
  padding: var(--space-lg) 0;
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

.process-steps {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
  padding: 0 var(--space-md);
}

.process-step {
  flex: 1;
  min-width: 140px;
  text-align: center;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -0.8rem;
  top: 20px;
  color: var(--color-primary);
  font-size: 1.2rem;
  font-weight: 700;
}

.step-circle {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-sm);
  background: var(--color-white);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 800;
  font-size: 1.1rem;
}

.process-step h4 {
  font-size: 0.95rem;
  color: var(--color-dark);
  margin-bottom: 0.3rem;
}

.process-step p {
  font-size: 0.8rem;
  color: var(--color-gray-500);
}

/* ============================================
   裝修預算（套餐）
   ============================================ */
.pricing {
  background: var(--color-gray-50);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: stretch;
}

.price-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.price-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-orange);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 1.2rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.price-tier {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}

.price-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.price-amount {
  margin-bottom: var(--space-md);
}

.price-amount .currency {
  font-size: 1.2rem;
  color: var(--color-primary);
  font-weight: 600;
  vertical-align: top;
}

.price-amount .number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.price-amount .unit {
  font-size: 0.85rem;
  color: var(--color-gray-500);
  display: block;
  margin-top: 0.3rem;
}

.price-features {
  text-align: left;
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.price-features li {
  padding: 0.5rem 0;
  font-size: 0.88rem;
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
  padding-left: 1.5rem;
  position: relative;
}

.price-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.price-card .btn {
  width: 100%;
}

.pricing-note {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: 0.88rem;
  color: var(--color-gray-500);
}

/* ============================================
   聯絡我們
   ============================================ */
.contact {
  background: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-lg);
}

.contact-info h2 {
  font-size: 1.8rem;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.contact-info > p {
  color: var(--color-gray-700);
  margin-bottom: var(--space-lg);
}

.contact-item {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  align-items: flex-start;
}

.contact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.1rem;
}

.contact-item h4 {
  font-size: 0.95rem;
  color: var(--color-dark);
  margin-bottom: 0.2rem;
}

.contact-item p,
.contact-item a {
  font-size: 0.9rem;
  color: var(--color-gray-700);
  line-height: 1.5;
}

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

/* 表單 */
.contact-form {
  background: var(--color-gray-50);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.form-group {
  margin-bottom: var(--space-sm);
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 0.4rem;
}

.form-group label .required {
  color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  background: var(--color-white);
  transition: all var(--transition-fast);
  color: var(--color-dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(245,124,0,0.1);
}

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

.form-submit {
  width: 100%;
  margin-top: var(--space-sm);
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-md);
  background: #E8F5E9;
  color: #2E7D32;
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
}

.form-success.show {
  display: block;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-dark);
  color: var(--color-gray-300);
  padding: var(--space-lg) 0 var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-brand img {
  height: 50px;
  margin-bottom: var(--space-sm);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-gray-500);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--color-gray-500);
}

.footer-social {
  display: flex;
  gap: 0.8rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-300);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ============================================
   燈箱 Lightbox
   ============================================ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.lightbox.show {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.3);
}

.lightbox-caption {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-white);
  font-size: 1rem;
  text-align: center;
}

/* 燈箱計數器 */
.lightbox-counter {
  position: absolute;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-white);
  font-size: 0.9rem;
  background: rgba(0,0,0,0.5);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
}

/* 燈箱左右切換按鈕 */
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
  z-index: 10;
  user-select: none;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.3);
}

.lightbox-prev {
  left: 1.5rem;
}

.lightbox-next {
  right: 1.5rem;
}

.lightbox-nav.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* 燈箱縮略圖 */
.lightbox-thumbs {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  max-width: 80%;
  overflow-x: auto;
  padding: 0.5rem;
}

.lightbox-thumb {
  width: 60px;
  height: 45px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.5;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  flex-shrink: 0;
}

.lightbox-thumb:hover,
.lightbox-thumb.active {
  opacity: 1;
  border-color: var(--color-primary);
}

@media (max-width: 768px) {
  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }
  .lightbox-thumbs { bottom: 4rem; }
  .lightbox-thumb { width: 45px; height: 34px; }
}

/* ============================================
   回到頂部
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-orange);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* ---------- 背景音樂播放器 ---------- */
.music-toggle {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.2rem;
  background: rgba(26,26,26,0.85);
  backdrop-filter: blur(10px);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  z-index: 998;
  transition: all var(--transition-normal);
  border: 1px solid rgba(255,255,255,0.1);
}

.music-toggle:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

.music-toggle.playing {
  background: var(--color-primary);
}

.music-icon {
  font-size: 1.1rem;
  display: inline-block;
}

.music-toggle.playing .music-icon {
  animation: musicSpin 2s linear infinite;
}

@keyframes musicSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.music-text {
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .music-toggle {
    bottom: 1rem;
    left: 1rem;
    padding: 0.6rem 1rem;
  }
  .music-text {
    display: none;
  }
}

/* ============================================
   動畫：滾動入場
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   響應式設計
   ============================================ */

/* 平板 */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.5rem; }
  .values-grid { grid-template-columns: repeat(3, 1fr); }
  .furniture-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* 手機 */
@media (max-width: 768px) {
  :root {
    --space-xl: 4rem;
    --space-lg: 2.5rem;
  }

  section { padding: var(--space-lg) 0; }
  .section-title { font-size: 1.6rem; }

  /* 導航 */
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-md);
    gap: 0.2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    align-items: stretch;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .nav-menu a {
    padding: 0.8rem 1rem;
    text-align: center;
  }

  .nav-cta {
    margin: 0.5rem 0 0;
    text-align: center;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Hero */
  .hero { min-height: 90vh; }
  .hero h1 { font-size: 1.9rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: var(--space-md); }
  .hero-stat h3 { font-size: 1.5rem; }

  /* 關於 */
  .about-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }

  /* 最新資訊 */
  .news-grid { grid-template-columns: 1fr; }

  /* 工程範例 */
  .projects-grid { grid-template-columns: 1fr; }

  /* 傢俬 */
  .furniture-grid { grid-template-columns: repeat(2, 1fr); }

  /* 裝修 */
  .renovation-services { grid-template-columns: 1fr; }
  .process-step:not(:last-child)::after { display: none; }
  .process-steps { flex-direction: column; align-items: center; }

  /* 套餐 */
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { order: -1; }

  /* 聯絡 */
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .footer-bottom { flex-direction: column; text-align: center; }

  .back-to-top { bottom: 1rem; right: 1rem; }
}

/* 小手機 */
@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; }
  .furniture-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
}