/* 亞信．鄭詩瀚會計事務所 官方網站樣式表 */

/* --- 變數與設計系統 --- */
:root {
  --primary: #F26522;
  --primary-hover: #E05315;
  --primary-light: #FFF0E8;
  --secondary: #1E232B;
  --secondary-hover: #111419;
  --text-main: #2D3139;
  --text-muted: #646E7C;
  --bg-light: #F8F9FA;
  --bg-white: #FFFFFF;
  --border-color: #E9ECF0;
  --success-color: #10B981;
  --error-color: #EF4444;
  --line-color: #06C755;
  
  --font-sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  
  --shadow-sm: 0 4px 12px rgba(30, 35, 43, 0.03);
  --shadow-md: 0 8px 30px rgba(30, 35, 43, 0.06);
  --shadow-lg: 0 16px 48px rgba(30, 35, 43, 0.12);
  --shadow-orange: 0 8px 24px rgba(242, 101, 34, 0.25);
  --shadow-line: 0 8px 24px rgba(6, 199, 85, 0.3);
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 24px;
}

/* --- 重設與基礎樣式 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

/* 捲動軸樣式 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-light);
}
::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 5px;
  border: 2px solid var(--bg-light);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- 共用元件 --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
  position: relative;
}

.text-center { text-align: center; }
.text-white { color: var(--bg-white) !important; }
.text-orange { color: var(--primary) !important; }

/* 標題與段落 */
.section-header {
  max-width: 700px;
  margin: 0 auto 56px auto;
}

.section-subtitle {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--secondary);
  line-height: 1.3;
}

.title-line {
  width: 60px;
  height: 3px;
  background-color: var(--primary);
  margin: 18px auto 20px auto;
  border-radius: 2px;
}

.title-line.left-aligned {
  margin-left: 0;
  margin-right: auto;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 按鈕樣式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(242, 101, 34, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--bg-white);
  color: var(--secondary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-light);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-block {
  width: 100%;
}

.required {
  color: var(--error-color);
  margin-left: 3px;
}

/* --- 導覽列 (Navbar) --- */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
}

#header.scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-weight: 700;
  transition: var(--transition-fast);
}

.logo-accent {
  color: var(--primary);
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 1px;
}

.logo-divider {
  display: inline-block;
  width: 1px;
  height: 20px;
  background-color: #D1D5DB;
  margin: 0 10px;
}

.logo-name {
  color: var(--secondary);
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}

#header.scrolled .logo-name {
  color: var(--secondary);
}

/* 導覽選單 */
.nav-menu ul {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary);
}

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

.nav-link.active {
  color: var(--primary);
  font-weight: 700;
}

.nav-btn-outline {
  text-decoration: none;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--border-radius-sm);
  padding: 8px 20px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

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

/* 手機版漢堡按鈕 */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--secondary);
  position: relative;
  transition: background-color 0.3s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--secondary);
  transition: transform 0.3s ease;
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

/* 漢堡按鈕展開狀態 */
.mobile-nav-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: translateY(6px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* --- 首頁 Hero 區塊 --- */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px 0;
  background-color: var(--bg-light);
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(242, 101, 34, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.tagline-badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.tagline-icon {
  margin-right: 8px;
  display: flex;
  align-items: center;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--secondary);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.highlight-text {
  color: var(--primary);
  position: relative;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

/* Hero 右側圖示視覺 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-card-wrapper {
  position: relative;
  width: 100%;
  max-width: 450px;
}

.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  display: block;
}

/* 浮動圖章卡片 */
.floating-badge {
  position: absolute;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--border-radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

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

.badge-1 {
  bottom: 30px;
  left: -40px;
}

.badge-2 {
  top: 30px;
  right: -30px;
}

.badge-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.badge-icon.icon-orange {
  background-color: var(--primary-light);
  color: var(--primary);
}

.badge-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--secondary);
}

.badge-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- 服務對象區塊 (Target Clients) --- */
.about-section {
  background-color: var(--bg-white);
  border-top: 1px solid var(--border-color);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.client-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.client-card:hover {
  background-color: var(--bg-white);
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.client-icon {
  width: 56px;
  height: 56px;
  background-color: var(--bg-white);
  border-radius: 50%;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.client-card:hover .client-icon {
  background-color: var(--primary);
  color: var(--bg-white);
}

.client-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 12px;
}

.client-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- 服務項目區塊 (Services) --- */
.services-section {
  background-color: var(--bg-light);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(242, 101, 34, 0.2);
}

.service-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-sm);
  background-color: var(--secondary);
  color: var(--bg-white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-icon.icon-orange {
  background-color: var(--primary);
}

.service-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--secondary);
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-list li {
  font-size: 0.95rem;
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
}

.bullet-dot {
  width: 6px;
  height: 6px;
  background-color: var(--primary);
  border-radius: 50%;
  margin-top: 10px;
  margin-right: 12px;
  flex-shrink: 0;
}

.service-list li strong {
  font-weight: 700;
  color: var(--secondary);
  margin-right: 4px;
}

/* --- 事務所優勢區塊 (Advantages) --- */
.advantages-section {
  background-color: var(--secondary);
  color: var(--bg-white);
  overflow: hidden;
}

.advantages-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: center;
}

.advantages-text {
  max-width: 650px;
}

.advantages-intro {
  font-size: 1.1rem;
  color: #94A3B8;
  margin-bottom: 40px;
}

.advantage-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.advantage-item {
  display: flex;
  gap: 24px;
}

.advantage-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.advantage-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--bg-white);
}

.advantage-info p {
  font-size: 0.92rem;
  color: #94A3B8;
  line-height: 1.6;
}

/* 優勢區塊右側：品牌理念卡片 */
.advantages-stat-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.brand-concept h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.concept-highlight {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.concept-explanation {
  font-size: 0.92rem;
  color: #CBD5E1;
  line-height: 1.7;
}

.advantages-stat-card .divider {
  height: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin: 32px 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.stat-val {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--bg-white);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-lbl {
  font-size: 0.85rem;
  color: #94A3B8;
  font-weight: 500;
}

/* --- 服務流程區塊 (Service Flow) --- */
.process-section {
  background-color: var(--bg-white);
}

.flow-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
  position: relative;
}

/* 連接虛線 */
.flow-container::before {
  content: '';
  position: absolute;
  top: 45px;
  left: 5%;
  right: 5%;
  height: 2px;
  background-image: linear-gradient(to right, var(--border-color) 60%, rgba(255, 255, 255, 0) 0%);
  background-position: bottom;
  background-size: 10px 2px;
  background-repeat: repeat-x;
  z-index: 1;
}

.flow-step {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 10px;
}

.step-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.step-number {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--bg-white);
  box-shadow: 0 0 0 1px var(--primary);
  margin-bottom: 12px;
  transition: var(--transition-smooth);
}

.flow-step:hover .step-number {
  background-color: var(--primary);
  color: var(--bg-white);
  transform: scale(1.1);
  box-shadow: 0 0 0 1px var(--primary), var(--shadow-orange);
}

.step-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1.5px;
}

.step-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 10px;
}

.step-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- FAQ 區塊 (FAQ) --- */
.faq-section {
  background-color: var(--bg-light);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.faq-wrapper {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: flex-start;
}

.faq-intro {
  position: sticky;
  top: 120px;
}

.faq-desc-text {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.accordion-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.accordion-item:hover {
  border-color: rgba(242, 101, 34, 0.3);
}

.accordion-trigger {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
}

.question-text {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary);
  padding-right: 15px;
  transition: var(--transition-fast);
}

.accordion-trigger:hover .question-text {
  color: var(--primary);
}

.icon-wrapper {
  flex-shrink: 0;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chevron {
  transition: transform 0.3s ease;
}

/* 展開狀態的旋轉動畫 */
.accordion-trigger[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-trigger[aria-expanded="true"] .question-text {
  color: var(--primary);
}

/* 摺疊內容區 */
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.accordion-inner {
  padding: 0 30px 24px 30px;
  border-top: 1px solid transparent;
  font-size: 0.95rem;
  color: var(--text-main);
}

.accordion-trigger[aria-expanded="true"] + .accordion-content .accordion-inner {
  border-top: 1px solid var(--border-color);
}

.inner-list {
  margin: 12px 0 12px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.inner-list li {
  font-size: 0.9rem;
}

/* --- 聯絡我們區塊 (Contact) --- */
.contact-section {
  background-color: var(--bg-white);
}

.contact-card-wrapper {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  background-color: var(--secondary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* 左側：聯絡資訊與地圖 */
.contact-info-panel {
  padding: 60px 48px;
  display: flex;
  flex-direction: column;
  background-color: var(--secondary-hover);
}

.contact-panel-desc {
  font-size: 0.95rem;
  color: #94A3B8;
  margin-top: 16px;
  margin-bottom: 40px;
}

.info-links {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 40px;
}

.info-link-item {
  display: flex;
  align-items: center;
  gap: 20px;
  text-decoration: none;
  color: var(--bg-white);
  transition: var(--transition-fast);
}

.info-link-item:hover {
  transform: translateX(4px);
}

.info-link-item.non-clickable:hover {
  transform: none;
}

.info-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-link-item:hover .info-icon {
  background-color: var(--primary);
  color: var(--bg-white);
}

.info-icon.icon-line {
  color: var(--line-color);
  background-color: rgba(6, 199, 85, 0.1);
}

.info-link-item:hover .info-icon.icon-line {
  background-color: var(--line-color);
  color: var(--bg-white);
}

.info-label {
  font-size: 0.75rem;
  color: #94A3B8;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.info-val {
  font-size: 1.05rem;
  font-weight: 500;
}

.map-container {
  width: 100%;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin-top: auto;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 右側：表單 */
.contact-form-panel {
  padding: 60px 48px;
  background-color: var(--bg-white);
  position: relative;
}

.form-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.form-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--secondary);
  background-color: var(--bg-light);
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background-color: var(--bg-white);
  box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.1);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23646E7C' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 14px;
  padding-right: 40px;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: var(--error-color);
  background-color: #FFF5F5;
}

.error-msg {
  display: none;
  font-size: 0.78rem;
  color: var(--error-color);
  margin-top: 5px;
}

.form-group.error .error-msg {
  display: block;
}

/* 載入中動畫 */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
  margin-left: 8px;
}

.spinner.hidden {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 成功提交 Overlay */
.form-success-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  z-index: 10;
}

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

.success-message-card {
  text-align: center;
  max-width: 440px;
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-success-overlay.active .success-message-card {
  transform: translateY(0);
}

.success-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
}

.success-message-card h4 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 12px;
}

.success-message-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

/* --- 頁尾 (Footer) --- */
.footer-section {
  background-color: var(--secondary-hover);
  color: #94A3B8;
  padding: 80px 0 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 1fr;
  gap: 64px;
  margin-bottom: 60px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand .logo-name {
  color: var(--bg-white);
}

.footer-tagline {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-grid h4 {
  color: var(--bg-white);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 24px;
  position: relative;
}

.footer-grid h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 30px;
  height: 2px;
  background-color: var(--primary);
}

.footer-nav ul,
.footer-services ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-nav a {
  text-decoration: none;
  color: #94A3B8;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-services li {
  font-size: 0.9rem;
}

/* 著作權欄位 */
.copyright-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 30px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer-note {
  font-weight: 500;
  letter-spacing: 1px;
}

/* --- 浮動元件與按鈕 (Floating actions) --- */
.floating-actions {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

.floating-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  position: relative;
}

.floating-btn:hover {
  transform: translateY(-5px) scale(1.05);
}

.btn-totop {
  background-color: var(--bg-white);
  color: var(--secondary);
  border: 1px solid var(--border-color);
}

.btn-totop:hover {
  background-color: var(--bg-light);
  color: var(--primary);
}

.btn-totop.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}

/* LINE 諮詢按鈕 */
.btn-line {
  background-color: var(--line-color);
  box-shadow: var(--shadow-line);
  animation: pulse-line 2s infinite;
}

.line-svg {
  fill: var(--bg-white);
}

.line-tooltip {
  position: absolute;
  right: 70px;
  background-color: var(--secondary);
  color: var(--bg-white);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(10px);
  transition: var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.line-tooltip::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -5px;
  transform: translateY(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background-color: var(--secondary);
}

.btn-line:hover .line-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* LINE 呼吸燈動畫 */
@keyframes pulse-line {
  0% {
    box-shadow: 0 0 0 0 rgba(6, 199, 85, 0.4);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(6, 199, 85, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(6, 199, 85, 0);
  }
}

/* --- 響應式網頁設計 (Media Queries) --- */

/* 寬螢幕與標準桌面 */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
  
  .hero-title {
    font-size: 2.75rem;
  }
  
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .flow-container {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
  
  .flow-container::before {
    display: none; /* 斷行後隱藏橫線 */
  }
}

/* 平板尺寸 (Tablet) */
@media (max-width: 992px) {
  .container {
    max-width: 720px;
  }
  
  section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  /* 導覽選單改為手機漢堡選單 */
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--bg-white);
    transition: var(--transition-smooth);
    padding: 40px 24px;
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
  }
  
  .nav-menu.open {
    left: 0;
  }
  
  .nav-menu ul {
    flex-direction: column;
    align-items: stretch;
    gap: 24px;
    text-align: center;
  }
  
  .nav-link {
    font-size: 1.15rem;
    display: block;
    padding: 10px 0;
  }
  
  .nav-link::after {
    display: none;
  }
  
  .nav-btn-outline {
    display: block;
    padding: 12px;
    font-size: 1.1rem;
    margin-top: 12px;
  }
  
  /* Hero */
  .hero-container {
    grid-template-columns: 1fr;
    gap: 56px;
    text-align: center;
  }
  
  .hero-content {
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual {
    margin-top: 20px;
  }
  
  /* Services & FAQ & Contact */
  .services-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .advantages-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .faq-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .faq-intro {
    position: static;
    text-align: center;
  }
  
  .faq-intro .title-line {
    margin-left: auto;
    margin-right: auto;
  }
  
  .contact-card-wrapper {
    grid-template-columns: 1fr;
  }
  
  .contact-info-panel {
    padding: 40px 30px;
  }
  
  .contact-form-panel {
    padding: 40px 30px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .copyright-bar {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* 手機版 (Mobile Phone) */
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .tagline-badge {
    font-size: 0.8rem;
  }
  
  .floating-badge {
    padding: 12px 14px;
  }
  
  .badge-1 {
    left: -10px;
    bottom: 10px;
  }
  
  .badge-2 {
    right: -10px;
    top: 10px;
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .client-card {
    padding: 24px 16px;
  }
  
  .flow-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .floating-actions {
    bottom: 20px;
    right: 20px;
  }
  
  .line-tooltip {
    display: none; /* 手機端隱藏文字 tooltip 避免遮擋 */
  }
}

@media (max-width: 480px) {
  .clients-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .logo-name {
    font-size: 1.1rem;
  }
  
  .logo-accent {
    font-size: 1.3rem;
  }
}