/* ============================================
   FONEXA LIMITED - 深海墨藍×聲納青 設計系統
   主色: 深海墨藍 #0e2a3d / 聲納青 #22d3ee
   ============================================ */

/* ===== CSS 變數 ===== */
:root {
  /* 深海墨藍色系 */
  --deep:        #0e2a3d;
  --deep-light:  #16394f;
  --deep-light2: #1e4a63;
  --deep-dark:   #0a1f2e;
  --deep-darker: #04121d;

  /* 聲納青色系 */
  --sonar:       #22d3ee;
  --sonar-light: #67e8f9;
  --sonar-dark:  #0e7490;
  --sonar-glow:  rgba(34, 211, 238, 0.35);

  /* 文字 */
  --text:        #eef6fa;
  --text-soft:   #c3d3dd;
  --text-muted:  #8aa3b3;
  --white:       #ffffff;

  /* 漸變 */
  --grad-hero:    linear-gradient(160deg, #04121d 0%, #0a1f2e 30%, #0e2a3d 60%, #0e7490 100%);
  --grad-deep:    linear-gradient(135deg, #0e2a3d 0%, #0a1f2e 100%);
  --grad-card:    linear-gradient(150deg, #16394f 0%, #0e2a3d 70%, #0a1f2e 100%);
  --grad-card-h:  linear-gradient(150deg, #1e4a63 0%, #0e2a3d 60%, #0e7490 130%);
  --grad-sonar:   linear-gradient(135deg, #22d3ee 0%, #0e7490 100%);
  --grad-cta:     linear-gradient(135deg, #0e2a3d 0%, #0e7490 100%);
  --grad-footer:  linear-gradient(180deg, #0a1f2e 0%, #04121d 100%);
  --grad-text:    linear-gradient(120deg, #eef6fa 0%, #67e8f9 100%);

  /* 字體（繁體中文優先） */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang HK", "Hiragino Sans GB", "Microsoft JhengHei", "Heiti TC", sans-serif;

  /* 佈局 */
  --maxw: 1200px;
  --radius:    16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --t-fast: 0.25s ease;
  --t:      0.35s ease;
  --t-slow: 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--deep-darker);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 排版 ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--white);
}

h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-soft);
}

a {
  color: var(--sonar-light);
  text-decoration: none;
  transition: color var(--t-fast);
}

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

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

ul {
  list-style: none;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-sm {
  padding: 70px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sonar-light);
  padding: 6px 18px;
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 50px;
  margin-bottom: 20px;
  background: rgba(34, 211, 238, 0.08);
}

.section-title {
  margin-bottom: 16px;
}

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

/* ===== 按鈕 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-sonar);
  color: var(--white);
  box-shadow: 0 4px 20px var(--sonar-glow);
}

.btn-primary:hover {
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--sonar-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(138, 163, 179, 0.4);
}

.btn-secondary:hover {
  color: var(--white);
  border-color: var(--sonar);
  background: rgba(34, 211, 238, 0.1);
}

.btn-lg {
  padding: 16px 44px;
  font-size: 1.05rem;
}

/* ===== 導覽列 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: all var(--t);
  background: transparent;
}

.navbar.is-scrolled {
  padding: 12px 0;
  background: rgba(4, 18, 29, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(34, 211, 238, 0.15);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 700;
  font-size: 1.2rem;
}

.nav-logo:hover {
  color: var(--white);
}

.nav-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

/* 品牌字：FONEXA 主名 + FONEXA LIMITED 副名，雙行堆疊 */
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  letter-spacing: 1.5px;
}

.nav-logo-text span {
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 2.6px;
  color: var(--sonar-light);
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 50px;
  transition: all var(--t-fast);
  position: relative;
}

.nav-menu a:hover {
  color: var(--white);
  background: rgba(34, 211, 238, 0.1);
}

.nav-menu a.is-active {
  color: var(--white);
  background: rgba(34, 211, 238, 0.18);
}

.nav-menu a.is-active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: var(--sonar-light);
  border-radius: 2px;
}

/* 漢堡選單 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--t);
  margin: 0 auto;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== 頁面通用頁首（非首頁） ===== */
.page-hero {
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
  padding: 120px 0 60px;
}

.page-hero-content {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  margin-bottom: 14px;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== 首頁 Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 70% 40%, rgba(34, 211, 238, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(14, 42, 61, 0.6) 0%, transparent 50%);
  pointer-events: none;
}

/* 鯨魚裝飾 */
.hero-whale {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 600px;
  max-width: 55vw;
  opacity: 0.12;
  pointer-events: none;
  animation: whale-float 8s ease-in-out infinite;
}

@keyframes whale-float {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%      { transform: translateY(-48%) translateX(-15px); }
}

/* 聲波 */
.hero-waves {
  position: absolute;
  left: 8%;
  top: 50%;
  transform: translateY(-50%);
  width: 300px;
  height: 300px;
  pointer-events: none;
  opacity: 0.5;
}

.wave-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 2px solid var(--sonar);
  border-radius: 50%;
  opacity: 0;
  animation: wave-pulse 4s ease-out infinite;
}

.wave-ring:nth-child(1) { width: 60px;  height: 60px;  animation-delay: 0s; }
.wave-ring:nth-child(2) { width: 60px;  height: 60px;  animation-delay: 1s; }
.wave-ring:nth-child(3) { width: 60px;  height: 60px;  animation-delay: 2s; }
.wave-ring:nth-child(4) { width: 60px;  height: 60px;  animation-delay: 3s; }

@keyframes wave-pulse {
  0%   { transform: translate(-50%, -50%) scale(1);   opacity: 0.6; border-color: var(--sonar-light); }
  100% { transform: translate(-50%, -50%) scale(6);   opacity: 0;   border-color: var(--sonar); }
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 680px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 50px;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.35);
  font-size: 0.85rem;
  color: var(--sonar-light);
  margin-bottom: 24px;
}

.hero-tag svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  margin-bottom: 22px;
}

.hero h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 36px;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  flex-wrap: wrap;
}

.hero-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--sonar-light);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* 捲動指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

.scroll-indicator svg {
  width: 20px;
  height: 20px;
}

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

/* ===== 服務卡片 ===== */
.services-bg {
  background: var(--deep-darker);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.12);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-sonar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}

.service-card:hover {
  background: var(--grad-card-h);
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: rgba(34, 211, 238, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.3);
  margin-bottom: 24px;
}

.service-icon svg {
  width: 30px;
  height: 30px;
  color: var(--sonar-light);
}

.service-card h3 {
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.service-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sonar);
  flex-shrink: 0;
}

/* ===== 關於簡述（首頁） ===== */
.about-preview {
  background: var(--deep);
  position: relative;
  overflow: hidden;
}

.about-preview::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 30px;
}

.about-feature {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.about-feature-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(34, 211, 238, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature-icon svg {
  width: 22px;
  height: 22px;
  color: var(--sonar-light);
}

.about-feature h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.about-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual-card {
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--radius-lg);
  padding: 50px;
  text-align: center;
  width: 100%;
}

.about-visual-card .big-num {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about-visual-card .big-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.about-visual-card .divider {
  width: 40px;
  height: 2px;
  background: var(--sonar);
  margin: 24px auto;
  border-radius: 2px;
}

.about-visual-card .desc {
  font-size: 0.95rem;
  color: var(--text-soft);
}

/* ===== 理念（關於頁） ===== */
.philosophy {
  background: var(--deep);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.philosophy-card {
  text-align: center;
  padding: 40px 30px;
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.12);
  border-radius: var(--radius-lg);
  transition: all var(--t);
}

.philosophy-card:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-4px);
}

.philosophy-card .icon-wrap {
  width: 70px;
  height: 70px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.philosophy-card .icon-wrap svg {
  width: 32px;
  height: 32px;
  color: var(--sonar-light);
}

.philosophy-card h3 {
  margin-bottom: 12px;
}

.philosophy-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
}

/* 關於頁 - 公司簡介 */
.about-intro {
  background: var(--deep-darker);
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro-text h2 {
  margin-bottom: 24px;
}

.about-intro-text p {
  margin-bottom: 16px;
}

.about-intro-visual {
  position: relative;
}

.about-intro-visual svg {
  width: 100%;
  height: auto;
  opacity: 0.9;
}

/* 時間軸 */
.timeline {
  background: var(--deep);
}

.timeline-track {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sonar) 0%, rgba(34, 211, 238, 0.1) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -40px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--sonar);
  border: 3px solid var(--deep);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.3);
}

.timeline-year {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--sonar-light);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.timeline-item h4 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

/* ===== 服務詳情（服務頁） ===== */
.services-detail {
  background: var(--deep-darker);
}

.service-detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

.service-detail-block:last-child {
  margin-bottom: 0;
}

.service-detail-block:nth-child(even) .service-detail-text {
  order: 2;
}

.service-detail-text h3 {
  margin-bottom: 16px;
}

.service-detail-text p {
  margin-bottom: 20px;
}

.service-detail-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.service-detail-list li svg {
  width: 20px;
  height: 20px;
  color: var(--sonar-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.service-detail-visual {
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: var(--radius-lg);
  padding: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.service-detail-visual::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 60%);
}

.service-detail-visual svg {
  width: 120px;
  height: 120px;
  color: var(--sonar-light);
  opacity: 0.85;
  position: relative;
  z-index: 1;
}

/* 服務流程 */
.process {
  background: var(--deep);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.process-step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--grad-sonar);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  box-shadow: 0 4px 20px var(--sonar-glow);
}

.process-step h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0;
}

/* ===== 案例（案例頁） ===== */
.cases-bg {
  background: var(--deep-darker);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.case-card {
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--t);
}

.case-card:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.case-banner {
  height: 180px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-banner svg {
  width: 72px;
  height: 72px;
  color: var(--white);
  opacity: 0.85;
  z-index: 1;
}

.case-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 70% 30%, rgba(34, 211, 238, 0.3) 0%, transparent 60%);
}

.case-banner-1 { background: linear-gradient(135deg, #0e2a3d, #0e7490); }
.case-banner-2 { background: linear-gradient(135deg, #0a1f2e, #22d3ee); }
.case-banner-3 { background: linear-gradient(135deg, #16394f, #0e7490); }
.case-banner-4 { background: linear-gradient(135deg, #0e2a3d, #67e8f9); }

.case-body {
  padding: 30px;
}

.case-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--sonar-light);
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(34, 211, 238, 0.12);
  margin-bottom: 14px;
}

.case-body h3 {
  margin-bottom: 10px;
}

.case-body p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-meta span {
  font-size: 0.78rem;
  color: var(--text-soft);
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.15);
}

/* ===== CTA 區域 ===== */
.cta {
  background: var(--deep);
  position: relative;
  overflow: hidden;
}

.cta-box {
  background: var(--grad-cta);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-lg);
  padding: 60px 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-box h2 {
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  font-size: 1.05rem;
  color: var(--text-soft);
  max-width: 520px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}

.cta-box .btn {
  position: relative;
  z-index: 1;
}

/* ===== 聯絡頁——聲納軸·回聲式 ===== */
.contact-bg {
  background: var(--deep-darker);
  padding-bottom: 0;
}

/* 垂直聲納軸 */
.sonar-axis {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 30px 0 100px;
}

.sonar-axis::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 40px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.55) 0%, rgba(34, 211, 238, 0.2) 55%, rgba(34, 211, 238, 0) 100%);
}

/* 回聲卡：寬度不等、左右交替錯落 */
.echo-card {
  position: relative;
  background: var(--grad-card);
  border: 1px solid rgba(34, 211, 238, 0.15);
  border-radius: var(--radius);
  padding: 30px 32px;
  margin-bottom: 46px;
  transition: border-color var(--t), transform var(--t);
}

.echo-card:last-child {
  margin-bottom: 0;
}

.echo-card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-4px);
}

.echo-mail  { width: 46%; }
.echo-addr  { width: 42%; margin-left: auto; }
.echo-hours { width: 36%; }

/* 卡片到聲納軸的連接線 */
.echo-card::after {
  content: '';
  position: absolute;
  top: 41px;
  height: 1px;
  background: rgba(34, 211, 238, 0.35);
}

.echo-mail::after  { left: 100%;  width: 8.7%; }
.echo-addr::after  { right: 100%; width: 19%; }
.echo-hours::after { left: 100%;  width: 38.9%; }

/* 軸上的脈衝發光節點 */
.echo-node {
  position: absolute;
  top: 34px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--sonar);
  transform: translateX(-50%);
  z-index: 2;
  animation: node-pulse 2.8s ease-out infinite;
}

.echo-mail .echo-node  { left: 108.7%; }
.echo-addr .echo-node  { left: -19%; }
.echo-hours .echo-node { left: 138.9%; }

@keyframes node-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.55), 0 0 14px rgba(34, 211, 238, 0.5); }
  70%  { box-shadow: 0 0 0 12px rgba(34, 211, 238, 0), 0 0 14px rgba(34, 211, 238, 0.5); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0), 0 0 14px rgba(34, 211, 238, 0.5); }
}

.echo-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--sonar-light);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.echo-card p {
  font-size: 0.95rem;
  color: var(--text-soft);
  margin: 0;
}

.echo-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* 電郵卡：漸變底 + 漸變字大郵箱 */
.echo-mail {
  background: var(--grad-cta);
  border-color: rgba(34, 211, 238, 0.3);
}

.echo-mail-link {
  display: inline-block;
  font-size: clamp(1.15rem, 2.6vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.5px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  word-break: break-all;
}

.echo-mail-link:hover {
  opacity: 0.85;
}

/* 地址卡：中英雙行 */
.echo-addr-en {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.6px;
  line-height: 1.75;
  text-transform: uppercase;
}

.echo-addr-zh {
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 底部深底全寬表單帶（同心環裝飾） */
.form-band {
  position: relative;
  background: var(--grad-deep);
  border-top: 1px solid rgba(34, 211, 238, 0.18);
  padding: 80px 0 90px;
  overflow: hidden;
}

.form-band-rings {
  position: absolute;
  right: -140px;
  top: 50%;
  transform: translateY(-50%);
  width: 440px;
  height: 440px;
  pointer-events: none;
  opacity: 0.55;
}

.form-band .container {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.form-band h3 {
  text-align: center;
  margin-bottom: 10px;
}

.form-band-desc {
  text-align: center;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

/* 表單：姓名｜電郵同行，訊息全寬，按鈕左置 */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

.form-actions {
  display: flex;
  margin-top: 6px;
}

.form-actions .btn {
  min-width: 220px;
  justify-content: center;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 8px;
}

.form-group label .req {
  color: var(--sonar-light);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(4, 18, 29, 0.6);
  border: 1px solid rgba(138, 163, 179, 0.25);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: all var(--t-fast);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--sonar);
  background: rgba(4, 18, 29, 0.8);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-group input.is-error,
.form-group textarea.is-error {
  border-color: #e0748a;
  background: rgba(224, 116, 138, 0.05);
}

.form-error {
  display: none;
  font-size: 0.8rem;
  color: #e0748a;
  margin-top: 6px;
}

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

#form-success {
  display: none;
  padding: 18px 22px;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: var(--radius-sm);
  color: var(--sonar-light);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

#form-success svg {
  display: inline-block;
  width: 18px;
  height: 18px;
  margin-right: 8px;
  vertical-align: -3px;
}

/* ===== 頁尾（居中式，有別於其他站點的分欄頁尾） ===== */
.footer {
  background: var(--grad-footer);
  position: relative;
  padding-top: 0;
  overflow: hidden;
}

.footer-wave {
  width: 100%;
  height: 60px;
  margin-bottom: -1px;
}

.footer-wave svg {
  width: 100%;
  height: 100%;
  display: block;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 56px 0 36px;
}

.footer-logo {
  margin-bottom: 18px;
}

.footer-logo .nav-logo-text {
  align-items: center;
}

.footer-company {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text);
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.footer-mail {
  font-size: 1rem;
  margin-bottom: 6px;
}

.footer-mail a {
  color: var(--sonar-light);
}

.footer-mail a:hover {
  color: var(--white);
}

.footer-addr {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 30px;
  padding-top: 26px;
  border-top: 1px solid rgba(138, 163, 179, 0.14);
  width: 100%;
  max-width: 620px;
}

.footer-nav a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--t-fast);
}

.footer-nav a:hover {
  color: var(--sonar-light);
}

.footer-bottom {
  border-top: 1px solid rgba(138, 163, 179, 0.12);
  padding: 24px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  text-align: center;
}

/* 頁尾裝飾 - 鯨魚聲波 */
.footer-deco {
  position: absolute;
  bottom: 20px;
  right: 5%;
  width: 200px;
  opacity: 0.06;
  pointer-events: none;
}

/* ===== Reveal 動畫 ===== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

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

  .about-grid,
  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-visual {
    max-width: 500px;
    margin: 0 auto;
  }

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

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }

  .service-detail-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .service-detail-block:nth-child(even) .service-detail-text {
    order: 0;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  /* 漢堡選單 */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 32px 40px;
    gap: 8px;
    background: rgba(4, 18, 29, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-left: 1px solid rgba(34, 211, 238, 0.15);
    transition: right var(--t);
    overflow-y: auto;
  }

  .nav-menu.is-open {
    right: 0;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
  }

  .nav-menu a {
    width: 100%;
    padding: 14px 18px;
    font-size: 1.05rem;
  }

  .nav-menu a.is-active::after {
    display: none;
  }

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

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

  .about-features {
    grid-template-columns: 1fr;
  }

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

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

  /* 聲納軸貼左、回聲卡收單列 */
  .sonar-axis::before {
    left: 9px;
    transform: none;
  }

  .echo-card,
  .echo-mail,
  .echo-addr,
  .echo-hours {
    width: auto;
    margin-left: 36px;
    margin-right: 0;
  }

  .echo-card::after {
    display: none;
  }

  .echo-mail .echo-node,
  .echo-addr .echo-node,
  .echo-hours .echo-node {
    left: -26px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-actions .btn {
    width: 100%;
  }

  .hero {
    min-height: 90vh;
    padding-top: 100px;
    padding-bottom: 60px;
  }

  .hero-whale {
    opacity: 0.07;
    right: -20%;
  }

  .hero-waves {
    display: none;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-num {
    font-size: 1.6rem;
  }

  .form-band {
    padding: 60px 0 70px;
  }

  .form-band-rings {
    right: -220px;
    opacity: 0.35;
  }

  .echo-card {
    padding: 24px 22px;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .btn {
    padding: 12px 28px;
  }
}