/* ========================================
   KINETIC APPS LIMITED - 官網樣式
   主色: 明黃 #eab308 / 輔: #ca8a04
   深灰: #1f2937 / 背景: 白 + 淺黃 #fefce8
   ======================================== */

/* ===== CSS Variables ===== */
:root {
  --color-primary: #eab308;
  --color-secondary: #ca8a04;
  --color-primary-light: #facc15;
  --color-dark: #1f2937;
  --color-dark-medium: #374151;
  --color-gray: #4b5563;
  --color-gray-light: #6b7280;
  --color-gray-lighter: #9ca3af;
  --color-gray-border: #e5e7eb;
  --color-white: #ffffff;
  --color-bg-light: #fefce8;
  --color-bg-lighter: #fffbeb;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang HK", "Hiragino Sans CNS",
    "Microsoft JhengHei", sans-serif;

  --navbar-height: 70px;
  --max-width: 1200px;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

section[id] {
  scroll-margin-top: var(--navbar-height);
}

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

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-light);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-gray);
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.is-scrolled {
  background: var(--color-white);
  box-shadow: 0 2px 20px rgba(31, 41, 55, 0.08);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.nav-logo svg {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

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

.nav-menu a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width var(--transition);
}

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

.nav-menu a.is-active {
  color: var(--color-secondary);
}

/* Hamburger Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 10px;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn svg {
  width: 20px;
  height: 20px;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-dark);
  border-color: var(--color-dark);
}

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

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

.btn-dark:hover {
  background: var(--color-dark-medium);
  border-color: var(--color-dark-medium);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

/* ===== Hero ===== */
.hero {
  padding-top: calc(var(--navbar-height) + 80px);
  padding-bottom: 100px;
  background: var(--color-bg-light);
  position: relative;
  overflow: hidden;
}

.hero-shape {
  position: absolute;
  pointer-events: none;
}

.hero-shape-1 {
  width: 520px;
  height: 520px;
  background: var(--color-primary);
  border-radius: 50%;
  top: -180px;
  right: -120px;
  opacity: 0.18;
}

.hero-shape-2 {
  width: 260px;
  height: 260px;
  background: var(--color-secondary);
  border-radius: 30% 70% 70% 30%;
  bottom: -80px;
  right: 18%;
  opacity: 0.1;
}

.hero-shape-3 {
  width: 80px;
  height: 80px;
  background: var(--color-primary);
  border-radius: 16px;
  top: 45%;
  left: 4%;
  transform: rotate(20deg);
  opacity: 0.22;
}

.hero-shape-4 {
  width: 40px;
  height: 40px;
  background: var(--color-primary-light);
  border-radius: 50%;
  top: 30%;
  right: 42%;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-tag {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-primary);
  color: var(--color-dark);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-dark);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-title .highlight {
  color: var(--color-secondary);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-gray);
  max-width: 540px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

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

.service-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition);
}

.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(31, 41, 55, 0.1);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: var(--color-bg-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  margin-bottom: 24px;
}

.service-icon svg {
  width: 30px;
  height: 30px;
}

.service-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.98rem;
  color: var(--color-gray);
  line-height: 1.65;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.service-tags li {
  padding: 6px 14px;
  background: var(--color-bg-light);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-secondary);
}

/* ===== About Preview ===== */
.about-preview {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-preview-text .section-title {
  text-align: left;
}

.about-preview-text p {
  font-size: 1.05rem;
  color: var(--color-gray);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.stat-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-secondary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-gray);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 60px 0 80px;
}

.cta-box {
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: var(--color-primary-light);
  border-radius: 50%;
  top: -120px;
  right: -80px;
  opacity: 0.3;
}

.cta-box::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  background: var(--color-secondary);
  border-radius: 50%;
  bottom: -80px;
  left: -40px;
  opacity: 0.15;
}

.cta-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-text {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-bottom: 32px;
  opacity: 0.8;
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ===== Page Header ===== */
.page-header {
  padding-top: calc(var(--navbar-height) + 70px);
  padding-bottom: 60px;
  background: var(--color-bg-light);
  position: relative;
  overflow: hidden;
}

.page-header .hero-shape-1 {
  width: 400px;
  height: 400px;
  top: -140px;
  right: -100px;
}

.page-tag {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-primary);
  color: var(--color-dark);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.page-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
}

.page-subtitle {
  font-size: 1.15rem;
  color: var(--color-gray);
  max-width: 600px;
  position: relative;
  z-index: 1;
}

/* ===== About Page ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro-text .section-title {
  text-align: left;
  margin-bottom: 20px;
}

.about-intro-text p {
  font-size: 1.05rem;
  color: var(--color-gray);
  margin-bottom: 18px;
  line-height: 1.75;
}

.about-intro-text .quote {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-secondary);
  border-left: 4px solid var(--color-primary);
  padding-left: 20px;
  margin-top: 24px;
}

.about-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.about-stats-grid .stat-card {
  text-align: left;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
}

.about-stats-grid .stat-number {
  font-size: 2rem;
  margin-bottom: 0;
  flex-shrink: 0;
}

.about-stats-grid .stat-label {
  font-size: 0.95rem;
  text-align: left;
}

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

.value-card {
  background: var(--color-white);
  border: 2px solid var(--color-gray-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
}

.value-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(31, 41, 55, 0.1);
}

.value-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-dark);
  margin: 0 auto 24px;
}

.value-icon svg {
  width: 30px;
  height: 30px;
}

.value-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.value-card p {
  font-size: 0.98rem;
  color: var(--color-gray);
  line-height: 1.65;
}

/* ===== Contact Page: Info Strip ===== */
.contact-strip {
  background: var(--color-primary);
  border-top: 1px solid var(--color-secondary);
}

.strip-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.7fr 0.9fr;
  gap: 44px;
  padding: 46px 0;
}

.strip-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.strip-item + .strip-item {
  border-left: 2px solid rgba(31, 41, 55, 0.16);
  padding-left: 44px;
}

.strip-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-dark);
  opacity: 0.65;
  letter-spacing: 0.08em;
}

.strip-mail {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.01em;
  word-break: break-all;
  transition: opacity var(--transition);
}

.strip-mail:hover {
  opacity: 0.72;
}

.strip-value {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.6;
}

.strip-sub {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-dark);
  opacity: 0.72;
  line-height: 1.55;
  letter-spacing: 0.02em;
}

/* ===== Contact Page: Wide Form ===== */
.contact-form-section {
  padding: 96px 0 104px;
}

.form-wide {
  max-width: 860px;
  margin: 0 auto;
}

.form-wide .form-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 12px;
}

.form-wide .form-subtitle {
  text-align: center;
  font-size: 1.08rem;
  margin-bottom: 52px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.form-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.form-subtitle {
  font-size: 0.98rem;
  color: var(--color-gray);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 26px;
}

.form-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 15px 18px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 2px solid var(--color-gray-border);
  border-radius: 10px;
  background: var(--color-white);
  color: var(--color-dark);
  transition: border-color var(--transition);
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-lighter);
}

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

.form-input.has-error,
.form-textarea.has-error {
  border-color: var(--color-secondary);
}

.form-textarea {
  resize: vertical;
  min-height: 170px;
}

.field-error {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: 6px;
  min-height: 0;
  transition: opacity var(--transition);
}

.form-wide .form-submit {
  display: flex;
  width: auto;
  min-width: 240px;
  justify-content: center;
  margin: 16px auto 0;
}

.form-success {
  text-align: center;
  padding: 56px 32px;
}

.form-success-icon {
  width: 72px;
  height: 72px;
  background: var(--color-bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  margin: 0 auto 24px;
}

.form-success-icon svg {
  width: 36px;
  height: 36px;
}

.form-success h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.form-success p {
  font-size: 1rem;
  color: var(--color-gray);
}

/* ===== Footer ===== */
.footer {
  margin-top: 0;
}

.footer-main {
  background: var(--color-dark);
  padding: 64px 0 48px;
  border-top: 6px solid var(--color-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 48px;
}

.footer-brand .nav-logo {
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.95rem;
  color: var(--color-gray-lighter);
  line-height: 1.65;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col li {
  font-size: 0.95rem;
  color: var(--color-gray-lighter);
}

.footer-col li a {
  transition: color var(--transition);
}

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

.footer-bottom {
  background: var(--color-dark);
  padding: 20px 0;
  border-top: 1px solid var(--color-dark-medium);
}

.footer-bottom p {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-gray-lighter);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

.reveal-delay-3 {
  transition-delay: 0.36s;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .services-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about-stats,
  .about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-stats-grid .stat-card {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .about-stats-grid .stat-label {
    text-align: center;
  }

  /* 聯絡資訊橫條：三項豎排 */
  .strip-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 38px 0;
  }

  .strip-item + .strip-item {
    border-left: none;
    padding-left: 0;
    border-top: 2px solid rgba(31, 41, 55, 0.14);
    padding-top: 28px;
  }

  .section-title {
    font-size: 1.9rem;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: 0 8px 30px rgba(31, 41, 55, 0.12);
    border-top: 1px solid var(--color-gray-border);
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-menu a {
    font-size: 1.1rem;
    width: 100%;
    padding: 8px 0;
  }

  .hero {
    padding-top: calc(var(--navbar-height) + 50px);
    padding-bottom: 70px;
  }

  .hero-shape-1 {
    width: 320px;
    height: 320px;
    top: -120px;
    right: -80px;
  }

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

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

  .section {
    padding: 56px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 1.7rem;
  }

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

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

  .cta-box {
    padding: 44px 28px;
  }

  .cta-title {
    font-size: 1.6rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .contact-form-section {
    padding: 64px 0 72px;
  }

  .form-wide .form-subtitle {
    margin-bottom: 40px;
  }

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

  .strip-mail {
    font-size: 1.25rem;
  }

  .form-wide .form-submit {
    width: 100%;
  }

  .page-header {
    padding-top: calc(var(--navbar-height) + 50px);
    padding-bottom: 44px;
  }
}

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

  .hero-tag {
    font-size: 0.82rem;
  }

  .service-card,
  .value-card {
    padding: 32px 24px;
  }

  .stat-card {
    padding: 20px 16px;
  }

  .stat-number {
    font-size: 2rem;
  }
}