/* ========================================
   闫宝龙 - 法语网站建设
   Design: 法式优雅 + 商务专业
   ======================================== */

/* --- CSS Variables --- */
:root {
  --color-primary: #1a2744;
  --color-primary-light: #2a3d5e;
  --color-accent: #c9a96e;
  --color-accent-hover: #b8954f;
  --color-bg: #faf9f7;
  --color-bg-alt: #ffffff;
  --color-text: #2d3436;
  --color-text-light: #6b7280;
  --color-border: #f0eeeb;
  --color-card: #ffffff;
  --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-en: 'Inter', 'Noto Sans SC', sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(26,39,68,0.06);
  --shadow-md: 0 4px 16px rgba(26,39,68,0.08);
  --shadow-lg: 0 8px 32px rgba(26,39,68,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-cn);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 12px rgba(26,39,68,0.08);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  transition: color var(--transition);
  white-space: nowrap;
}

.navbar.scrolled .nav-logo {
  color: var(--color-primary);
}

.logo-text {
  position: relative;
  font-family: var(--font-cn);
}

.logo-r {
  font-size: 0.55em;
  position: absolute;
  top: -0.2em;
  right: -0.9em;
  color: var(--color-accent);
  font-weight: 400;
}

.logo-divider {
  color: rgba(255,255,255,0.4);
  margin: 0 4px;
  font-weight: 300;
  transition: color var(--transition);
}

.navbar.scrolled .logo-divider {
  color: var(--color-border);
}

.logo-sub {
  font-size: 0.85rem;
  font-weight: 400;
  opacity: 0.85;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border-radius: 6px;
  transition: all var(--transition);
}

.navbar.scrolled .nav-links a {
  color: var(--color-text);
}

.nav-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
}

.navbar.scrolled .nav-links a:hover {
  color: var(--color-primary);
  background: rgba(26,39,68,0.05);
}

.nav-links .nav-cta {
  background: var(--color-accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 6px;
  margin-left: 8px;
  font-weight: 600;
}

.nav-links .nav-cta:hover {
  background: var(--color-accent-hover);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

.navbar.scrolled .nav-toggle span {
  background: var(--color-primary);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(165deg, #0f1a2e 0%, #1a2744 35%, #243656 65%, #1a2744 100%);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(201,169,110,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(201,169,110,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--color-bg), transparent);
  pointer-events: none;
}

.hero-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 40px) 24px 80px;
  position: relative;
  z-index: 1;
}

.hero-inner {
  max-width: 800px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
  padding: 6px 20px;
  border: 1px solid rgba(201,169,110,0.3);
  border-radius: 30px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 24px;
  letter-spacing: 1px;
}

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-cn);
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(201,169,110,0.3);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(201,169,110,0.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-family: var(--font-en);
  font-size: 2.4rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.stat-plus {
  color: var(--color-accent);
  font-size: 0.7em;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.35);
  font-size: 0.75rem;
  letter-spacing: 1px;
  z-index: 2;
  animation: scrollBounce 2s ease-in-out infinite;
}

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

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

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.4;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

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

.service-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(26,39,68,0.04), rgba(201,169,110,0.08));
  border-radius: 14px;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

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

.solution-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: all var(--transition);
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.solution-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
}

.solution-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.solution-card > p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.solution-features li {
  font-size: 0.88rem;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
}

.solution-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

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

.advantage-item {
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.advantage-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.advantage-num {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.4;
  margin-bottom: 12px;
  line-height: 1;
}

.advantage-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.advantage-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- Process Timeline --- */
.process-timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}

.process-timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.process-step {
  display: flex;
  gap: 28px;
  padding-bottom: 40px;
  position: relative;
}

.process-step:last-child {
  padding-bottom: 0;
}

.process-marker {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  position: relative;
  z-index: 1;
  transition: all var(--transition);
}

.process-marker span {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
}

.process-step:hover .process-marker {
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.process-step:hover .process-marker span {
  color: #fff;
}

.process-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
  padding-top: 4px;
}

.process-content p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- FAQ --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: rgba(201,169,110,0.3);
}

.faq-item[open] {
  border-color: rgba(201,169,110,0.4);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
  gap: 16px;
  user-select: none;
}

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

.faq-icon {
  flex-shrink: 0;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* --- About --- */
.about-wrapper {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 60px;
  align-items: start;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.about-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: var(--color-accent);
  color: #fff;
  padding: 14px 20px;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-md);
}

.about-badge-num {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
}

.about-badge-text {
  font-size: 0.75rem;
  margin-top: 2px;
  white-space: nowrap;
}

.about-content .section-tag {
  display: block;
  text-align: left;
  margin-bottom: 8px;
}

.about-content .section-title {
  margin-bottom: 24px;
}

.about-text p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 2;
  margin-bottom: 16px;
}

.about-text strong {
  color: var(--color-primary);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.highlight-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.highlight-item strong {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.highlight-item span {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* --- Contact --- */
.contact-wrapper {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 60px;
  flex-wrap: wrap;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  flex: 1;
  min-width: 280px;
  max-width: 480px;
}

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

.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(26,39,68,0.04), rgba(201,169,110,0.08));
  border-radius: 12px;
  color: var(--color-primary);
}

.contact-item h4 {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.contact-link,
.contact-value {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
}

.contact-link:hover {
  color: var(--color-accent);
}

.contact-qrcode {
  text-align: center;
}

.contact-qrcode img {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  object-fit: cover;
}

.contact-qrcode p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 12px;
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 0;
}

.footer-links-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-links-grid a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
  white-space: nowrap;
}

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

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.8;
}

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

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

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .about-wrapper {
    grid-template-columns: 300px 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .section {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 48px;
  }

  /* Mobile Nav */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 80px 24px 24px;
    gap: 0;
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    transition: right var(--transition);
    z-index: 999;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    color: var(--color-text) !important;
    padding: 14px 16px;
    font-size: 0.95rem;
    border-radius: 8px;
  }

  .nav-links a:hover {
    background: rgba(26,39,68,0.05) !important;
    color: var(--color-primary) !important;
  }

  .nav-links .nav-cta {
    margin-left: 0;
    margin-top: 12px;
    text-align: center;
  }

  /* Hero */
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-desc {
    font-size: 0.95rem;
  }

  .hero-stats {
    gap: 32px;
  }

  .stat-num {
    font-size: 1.8rem;
  }

  .hero-scroll-hint {
    display: none;
  }

  /* Grids */
  .services-grid,
  .solutions-grid,
  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* About */
  .about-wrapper {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-image {
    max-width: 320px;
    margin: 0 auto;
  }

  .about-content .section-tag,
  .about-content .section-title {
    text-align: center !important;
  }

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

  /* Contact */
  .contact-wrapper {
    flex-direction: column;
    align-items: center;
    gap: 40px;
  }

  .contact-info {
    max-width: 100%;
  }

  /* Process */
  .process-timeline::before {
    left: 20px;
  }

  .process-marker {
    width: 42px;
    height: 42px;
  }

  .process-step {
    gap: 20px;
  }

  /* Footer */
  .footer-links-grid {
    gap: 6px 16px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .about-highlights {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .highlight-item strong {
    font-size: 1.2rem;
  }
}