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

:root {
  --orange: #ff6a00;
  --orange-dark: #c44b00;
  --orange-light: #ff9340;
  --black: #111111;
  --dark: #1a1a1a;
  --dark2: #222222;
  --gray: #555555;
  --light-gray: #f5f5f5;
  --white: #ffffff;
  --font: 'Segoe UI', 'Microsoft JhengHei', '微軟正黑體', sans-serif;
  --transition: 0.3s ease;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(0,0,0,0.15);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  line-height: 1.7;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================
   Navbar
============================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(17, 17, 17, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--orange);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1px;
}

.logo span {
  color: var(--orange);
  font-size: 0.9rem;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: #ccc;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--orange);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--orange);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  background: var(--dark);
  padding: 16px 24px 20px;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-menu a {
  color: #ccc;
  font-size: 1rem;
  display: block;
  padding: 6px 0;
  border-bottom: 1px solid #333;
  transition: var(--transition);
}

.mobile-menu a:hover {
  color: var(--orange);
}

.mobile-menu.open {
  display: block;
}

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

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255,106,0,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(255,106,0,0.10) 0%, transparent 50%);
}

/* Animated grid lines */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,106,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,106,0,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(17,17,17,0.5) 0%, rgba(17,17,17,0.8) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: 0 24px;
}

.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-content h1 span {
  color: var(--orange);
}

.hero-content p {
  font-size: 1.1rem;
  color: #bbb;
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.btn-primary {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: 2px solid var(--orange);
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--orange-dark);
  border-color: var(--orange-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,106,0,0.4);
}

.btn-primary.full {
  width: 100%;
  text-align: center;
  border: none;
  padding: 16px;
  font-size: 1.05rem;
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--white);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: 2px solid rgba(255,255,255,0.4);
  margin-left: 12px;
}

.btn-outline:hover {
  border-color: var(--orange);
  color: var(--orange);
  transform: translateY(-2px);
}

/* ============================
   Sections
============================ */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--black);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 4px;
  background: var(--orange);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-header p {
  color: var(--gray);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

.section-header.light h2 {
  color: var(--white);
}

.section-header.light p {
  color: #bbb;
}

/* ============================
   Services
============================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--white);
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--orange);
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: left;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(255,106,0,0.15);
  border-color: transparent;
}

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

.service-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
  color: var(--white);
  box-shadow: 0 6px 20px rgba(255,106,0,0.35);
}

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

.service-card p {
  font-size: 0.9rem;
  color: var(--gray);
  line-height: 1.7;
}

/* ============================
   Why Us
============================ */
.why-us {
  background: var(--dark);
}

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

.why-card {
  padding: 36px 20px;
  border: 1px solid rgba(255,106,0,0.2);
  border-radius: 12px;
  background: rgba(255,106,0,0.05);
  transition: var(--transition);
}

.why-card:hover {
  background: rgba(255,106,0,0.12);
  border-color: var(--orange);
  transform: translateY(-4px);
}

.why-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 12px;
}

.why-number span {
  font-size: 1.8rem;
}

.why-card p {
  color: #aaa;
  font-size: 0.95rem;
}

/* ============================
   Cases
============================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.case-card {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  background: var(--white);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.2);
}

.case-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: rgba(255,255,255,0.6);
}

.case-info {
  padding: 20px;
}

.case-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 6px;
}

.case-info p {
  font-size: 0.88rem;
  color: var(--gray);
  margin-bottom: 12px;
}

.case-tag {
  display: inline-block;
  background: rgba(255,106,0,0.1);
  color: var(--orange);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255,106,0,0.3);
}

/* ============================
   About
============================ */
.about {
  background: var(--light-gray);
}

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

.about-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--black);
  margin-bottom: 20px;
  position: relative;
}

.about-text h2::after {
  content: '';
  display: block;
  width: 50px;
  height: 4px;
  background: var(--orange);
  margin-top: 12px;
  border-radius: 2px;
}

.about-text p {
  color: var(--gray);
  margin-bottom: 16px;
  font-size: 0.97rem;
}

.about-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--black);
  font-size: 0.95rem;
  font-weight: 500;
}

.about-list i {
  color: var(--orange);
  font-size: 1rem;
  flex-shrink: 0;
}

.about-img-box {
  display: flex;
  justify-content: center;
}

.about-img-placeholder {
  width: 100%;
  max-width: 400px;
  height: 320px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 100%);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,106,0,0.5);
  font-size: 4rem;
  gap: 16px;
  border: 2px dashed rgba(255,106,0,0.3);
}

.about-img-placeholder p {
  color: #666;
  font-size: 0.9rem;
}

/* ============================
   Contact
============================ */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.info-item i {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.info-item h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.info-item p {
  color: var(--gray);
  font-size: 0.95rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--light-gray);
  padding: 36px;
  border-radius: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid #ddd;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255,106,0,0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ============================
   Footer
============================ */
footer {
  background: var(--dark);
  border-top: 2px solid var(--orange);
  padding-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.footer-brand p {
  color: #888;
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-links h4,
.footer-services h4 {
  color: var(--orange);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links ul,
.footer-services ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #888;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-services li {
  color: #888;
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid #2a2a2a;
  text-align: center;
  padding: 20px 0;
}

.footer-bottom p {
  color: #555;
  font-size: 0.85rem;
}

/* ============================
   Case Photo
============================ */
.case-img.photo {
  background-size: cover;
  background-position: center;
  position: relative;
}

.case-img-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.case-card:hover .case-img-overlay {
  opacity: 1;
}

.btn-gallery {
  background: var(--orange);
  color: var(--white);
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  font-family: var(--font);
}

.btn-gallery:hover {
  background: var(--orange-dark);
}

/* ============================
   Gallery Modal
============================ */
.gallery-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.gallery-modal.open {
  display: flex;
}

.gallery-modal-inner {
  background: var(--white);
  border-radius: 16px;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
}

.gallery-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 1;
}

.gallery-modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--black);
}

.gallery-modal-header button {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--gray);
  transition: var(--transition);
}

.gallery-modal-header button:hover {
  color: var(--orange);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 16px;
}

.gallery-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

/* ============================
   Lightbox
============================ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 8px;
}

.lightbox-content p {
  color: #aaa;
  margin-top: 12px;
  font-size: 0.9rem;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
  transition: var(--transition);
}

.lightbox-close:hover {
  color: var(--orange);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,106,0,0.8);
  border: none;
  color: var(--white);
  font-size: 1.3rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-prev:hover,
.lightbox-next:hover {
  background: var(--orange);
}

/* ============================
   Back to Top
============================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  background: var(--orange);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,106,0,0.4);
}

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

.back-to-top.show {
  display: flex;
}

/* ============================
   Responsive
============================ */
@media (max-width: 992px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .btn-outline {
    margin-left: 0;
    margin-top: 12px;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .section {
    padding: 70px 0;
  }

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

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

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

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

@media (max-width: 480px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-form {
    padding: 24px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}