:root {
  /*
   * "Modern Trust" Aesthetic
   * Deep Navy conveying authority, Rich Gold showing premium service.
   * Sharp, stark contrasts with generous white spacing for an editorial feel.
   */
  --color-primary: #0A192F;
  --color-primary-light: #162a4d;
  --color-accent: #D4AF37;
  --color-accent-hover: #b5952f;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FA;
  --color-text: #2A2A2A;
  --color-text-light: #555555;
  --color-white: #FFFFFF;
  --color-border: #EAEAEA;

  --font-display: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --spacing-sm: 1rem;
  --spacing-md: 2.5rem;
  --spacing-lg: 5rem;
  --spacing-xl: 7rem;

  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

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

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

.container {
  width: 90%;
  max-width: 1280px;
  margin: 0 auto;
}

/* 1. Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.03);
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  padding: 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 90px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 4%;
  transition: height 0.3s ease;
}

.navbar.scrolled .nav-container {
  height: 70px;
}

.logo img {
  height: 48px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 3.5rem;
  margin: 0 auto;
}

.nav-links a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-primary);
  position: relative;
  padding: 0.5rem 0;
  letter-spacing: 0.5px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition-smooth);
  transform: translateX(-50%);
}

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

.contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
}

.contact-item {
  color: var(--color-primary);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
}

.phone-icon {
  margin-right: 6px;
  vertical-align: middle;
  stroke: var(--color-accent);
}

/* 2. Header / Hero */
.hero {
  position: relative;
  height: 60vh;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-top: 90px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(10, 25, 47, 0.9), rgba(5, 12, 23, 0.8));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: 0 2rem;
  animation: fadeUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--color-white);
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2.5rem;
  font-weight: 300;
  letter-spacing: 1px;
}

.btn {
  display: inline-block;
  padding: 1.2rem 3.5rem;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1.1rem;
  border-radius: 0;
  letter-spacing: 1px;
  position: relative;
  border: none;
  overflow: hidden;
  z-index: 1;
  cursor: pointer;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 0; height: 100%;
  background-color: var(--color-accent-hover);
  transition: var(--transition-smooth);
  z-index: -1;
}

.btn:hover::before {
  width: 100%;
}

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

.btn-outline::before {
  background-color: var(--color-accent);
}

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

/* 3. Sections General */
section {
  padding: 6rem 0;
}

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

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.en-subtitle {
  display: block;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-light);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-top: 0.5rem;
  font-weight: 400;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent);
  margin-top: 1.5rem;
}

.subsection-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.subbed-title {
  text-align: center;
  font-size: 1.4rem;
  margin: 3rem 0 1.5rem;
  color: var(--color-primary);
}

.subsection-title .en-subtitle {
  font-size: 0.8rem;
  letter-spacing: 3px;
}

.subsection-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
  margin-top: 1rem;
}


/* 4. Features & Split Content */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.content-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  margin-bottom: 4rem;
}

.content-split.reverse {
  direction: rtl;
}

.content-split.reverse > * {
  direction: ltr;
}

.text-content h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.text-content p {
  color: var(--color-text-light);
  font-size: 1.1rem;
  line-height: 1.9;
  margin-bottom: 1.5rem;
}

.text-content ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.text-content ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.8rem;
  color: var(--color-text-light);
}

.text-content ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.image-content {
  position: relative;
  z-index: 1;
}

.image-content::after {
  content: '';
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-accent);
  z-index: -1;
  transition: var(--transition-smooth);
}

.content-split.reverse .image-content::after {
  right: auto;
  left: -20px;
}

.content-split.reverse .image-content:hover::after {
  transform: translate(10px, -10px);
}

.image-content:hover::after {
  transform: translate(-10px, -10px);
}

.image-content img {
  width: 100%;
  box-shadow: 0 20px 40px rgba(10, 25, 47, 0.08);
}

/* Services Details Grid */
.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.detail-item {
  background: var(--color-white);
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--color-accent);
  display: flex;
  align-items: center;
  font-weight: 500;
  font-size: 1.05rem;
  box-shadow: 0 5px 15px rgba(0,0,0,0.02);
  transition: var(--transition-smooth);
}

.detail-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.check-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: rgba(212, 175, 55, 0.1);
  color: var(--color-accent);
  border-radius: 50%;
  margin-right: 12px;
  font-size: 0.8rem;
  font-weight: bold;
}

/* FAQ Layout */
.faq-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
}

.faq-column {
  background: var(--color-white);
  padding: 2.5rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 5px 20px rgba(0,0,0,0.02);
}

.faq-category-title {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
}

.faq-category-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background-color: var(--color-accent);
  margin-right: 12px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.faq-item[open] {
  background-color: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: 0 5px 15px rgba(0,0,0,0.03);
}

.faq-item summary {
  padding: 1.2rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none; /* Remove default arrow */
  position: relative;
  padding-right: 3rem;
  color: var(--color-primary);
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--color-text-light);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
  color: var(--color-accent);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  padding: 0 1.2rem 1.2rem;
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0;
  border-top: 1px dashed var(--color-border);
  padding-top: 1rem;
}

/* Guarantee Area */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.guarantee-card {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.guarantee-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-accent);
  box-shadow: 0 15px 30px rgba(0,0,0,0.05);
}

.guarantee-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

.guarantee-card h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.guarantee-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* Service Info List (For value-added) */
.services-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.service-item {
  padding: 3rem;
  background: var(--color-bg-alt);
  border-left: 2px solid rgba(10, 25, 47, 0.1);
  transition: var(--transition-smooth);
}

.service-item:hover {
  background: var(--color-white);
  border-left-color: var(--color-accent);
  box-shadow: 0 15px 35px rgba(0,0,0,0.04);
}

.service-item h4 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.service-item p {
  color: var(--color-text-light);
  font-size: 1.05rem;
}

/* Registration custom UI block */
.process-steps {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto 5rem;
  background: var(--color-white);
  padding: 2.5rem 4rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
  border-radius: 4px;
}

.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--color-primary);
  font-weight: 500;
  position: relative;
  z-index: 2;
}

.step-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: #3b82f6; /* Modern trust blue icon color reference from attachment */
}

.step-divider {
  flex: 1;
  height: 2px;
  background-image: linear-gradient(to right, #ccc 33%, rgba(255,255,255,0) 0%);
  background-position: bottom;
  background-size: 10px 2px;
  background-repeat: repeat-x;
  margin: -30px 1rem 0; /* Align with circles */
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.image-card {
  position: relative;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.04);
  transition: var(--transition-smooth);
}

.image-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition-smooth);
}

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

.image-card.blue-tint::after {
  content: '';
  position: absolute;
  top:0; left:0; width:100%; height:100%;
  background: rgba(10, 25, 47, 0.2);
  pointer-events: none;
}

.card-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.2rem;
  background: rgba(10, 25, 47, 0.85); /* Slightly transparent dark background */
  color: var(--color-white);
  text-align: center;
  backdrop-filter: blur(4px);
}

.card-caption strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.3rem;
}

.card-caption p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  margin: 0;
}

.followup-services {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
  text-align: center;
}

.fl-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.fl-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
  color: var(--color-accent);
}


/* About Us Specific */
.about-info {
  text-align: center;
  max-width: 850px;
  margin: 0 auto;
  font-size: 1.15rem;
  line-height: 2;
  color: var(--color-text-light);
}

.about-cores {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 5rem;
}

.core-card {
  padding: 3rem 2rem;
  background: var(--color-white);
  border-top: 4px solid var(--color-accent);
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.core-card h4 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.core-card p {
  color: var(--color-text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}

.company-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.gallery-item {
  position: relative;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: var(--transition-smooth);
  filter: grayscale(20%);
}

.gallery-item:hover img {
  transform: scale(1.05);
  filter: grayscale(0%);
}

.gallery-item .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(10, 25, 47, 0.9));
  color: var(--color-white);
  transform: translateY(100%);
  transition: var(--transition-smooth);
  text-align: center;
  font-weight: 500;
  letter-spacing: 1px;
}

.gallery-item:hover .overlay {
  transform: translateY(0);
}

/* 8. CTA Section (Marketing Call-To-Action) */
.cta-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle at center, rgba(212, 175, 55, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.cta-content h2 {
  color: var(--color-white);
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
}

.cta-content p {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

/* 9. Extended Footer */
.site-footer {
  background-color: #050c17;
  color: rgba(255,255,255,0.6);
  padding: 5rem 0 2rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.footer-about .logo-img {
  height: 40px;
  margin-bottom: 1.5rem;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer-about p {
  line-height: 1.8;
  margin-bottom: 1.5rem;
  max-width: 400px;
}

.footer-title {
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.8rem;
}

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

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  transition: var(--transition-smooth);
}

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

.footer-contact li {
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.6;
}

.footer-contact svg {
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.footer-bottom a {
  color: rgba(255,255,255,0.6);
}

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

/* 10. Floating WeChat */
.wechat-float {
  position: fixed;
  bottom: 50px;
  right: 50px;
  z-index: 999;
}

.wechat-icon {
  width: 60px;
  height: 60px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px rgba(212, 175, 55, 0.4);
  cursor: pointer;
  transition: var(--transition-smooth);
}

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

.wechat-icon:hover {
  transform: scale(1.08);
  background-color: var(--color-primary);
}

.wechat-qr {
  position: absolute;
  bottom: 80px;
  right: 0;
  width: 220px;
  background: var(--color-white);
  padding: 1.5rem;
  border-radius: 4px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.12);
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: var(--transition-smooth);
  text-align: center;
  pointer-events: auto;
}

.wechat-float.hide-qr .wechat-qr {
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  pointer-events: none;
}

.wechat-qr::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: 22px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid var(--color-white);
}

.wechat-qr img {
  width: 100%;
  margin-bottom: 1rem;
}

.wechat-qr p {
  font-size: 0.9rem;
  color: var(--color-text);
  margin: 0;
  line-height: 1.5;
  font-weight: 500;
}

/* Responsive Breakpoints */
@media (max-width: 1100px) {
  .nav-container { padding: 0 2%; }
  .nav-links { gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .followup-services { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}

@media (max-width: 900px) {
  .content-split { grid-template-columns: 1fr; gap: 3rem; }
  .content-split.reverse .image-content { grid-row: 1; }
  .image-content::after { display: none; }
  .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-container { grid-template-columns: 1fr; }
  .about-cores { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; gap: 2rem; padding: 2rem; }
  .step-divider { width: 2px; height: 30px; margin: 0; background-image: linear-gradient(to bottom, #ccc 33%, rgba(255,255,255,0) 0%); background-position: center; background-size: 2px 10px; background-repeat: repeat-y; }
}

@media (max-width: 768px) {
  .nav-container { flex-direction: column; height: auto; padding: 1rem 0; }
  .navbar.scrolled .nav-container { height: auto; }
  .logo { margin-bottom: 1rem; }
  .nav-links { width: 100%; justify-content: center; gap: 1.5rem; margin-bottom: 1.2rem; flex-wrap: wrap; }
  .contact { align-items: center; flex-direction: row; gap: 1.5rem; }

  .hero { margin-top: 140px; }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 2.2rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .cta-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 300px; text-align: center; }

  .wechat-float { bottom: 25px; right: 25px; }

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