/* ============================================================
   Jingchu315 全局动画系统
   All animations / transitions / keyframes unified here.
   专业 · 可信 · 简洁 · 现代  （Apple / 政务风格）
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* Duration */
  --anim-fast:   200ms;
  --anim-normal: 300ms;
  --anim-slow:   600ms;
  --anim-extra:  800ms;

  /* Easing */
  --ease-out:   cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-in:    cubic-bezier(0.42, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shadow levels */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);

  /* Glow */
  --glow-accent: 0 0 0 3px rgba(0, 113, 227, 0.25);
}


/* ==============================================
   1. Keyframe Animations
   ============================================== */

/* Fade-up (scroll reveal) */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade-in */
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Scale-in (subtle) */
@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Count-up helper (for stat numbers) */
@keyframes count-glow {
  0%   { opacity: 1; }
  50%  { opacity: 0.7; }
  100% { opacity: 1; }
}

/* Shimmer for section separators */
@keyframes shimmer {
  0%   { transform: scaleX(0.3); opacity: 0.5; }
  50%  { transform: scaleX(1);   opacity: 1; }
  100% { transform: scaleX(0.3); opacity: 0.5; }
}

/* Success checkmark draw */
@keyframes check-draw {
  to { stroke-dashoffset: 0; }
}

/* Back-to-top entrance */
@keyframes btt-enter {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}


/* ==============================================
   2. Scroll-reveal classes (triggered by JS)
   ============================================== */

.anim-hidden {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--anim-slow) var(--ease-out),
              transform var(--anim-slow) var(--ease-out);
}

.anim-visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* Staggered delay helpers */
.anim-delay-1  { transition-delay: 100ms; }
.anim-delay-2  { transition-delay: 200ms; }
.anim-delay-3  { transition-delay: 300ms; }
.anim-delay-4  { transition-delay: 400ms; }
.anim-delay-5  { transition-delay: 500ms; }
.anim-delay-6  { transition-delay: 600ms; }


/* ==============================================
   3. Button Micro-interactions
   ============================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  transition:
    transform var(--anim-normal) var(--ease-spring),
    box-shadow var(--anim-normal) var(--ease-out),
    background var(--anim-normal) var(--ease-out),
    opacity var(--anim-normal) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

/* Primary CTA button */
.btn-primary {
  background: var(--color-accent, #0071E3);
  color: #fff;
  border-radius: 980px;
  padding: 18px 52px;
  font-size: 20px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-lg);
  background: #0077ED;
}

.btn-primary:active {
  transform: scale(0.97);
  box-shadow: var(--shadow-sm);
}

/* Secondary / outline button */
.btn-secondary {
  background: transparent;
  color: var(--color-accent, #0071E3);
  border: 1.5px solid var(--color-accent, #0071E3);
  border-radius: 980px;
  padding: 14px 36px;
  font-size: 17px;
  font-weight: 500;
}

.btn-secondary:hover {
  background: rgba(0, 113, 227, 0.06);
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-md);
}

.btn-secondary:active {
  transform: scale(0.97);
}

/* Submit button in forms */
.btn-submit {
  background: var(--color-accent, #0071E3);
  color: #fff;
  border-radius: 12px;
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 600;
  width: 100%;
  box-shadow: var(--shadow-sm);
}

.btn-submit:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg);
  background: #0077ED;
}

.btn-submit:active {
  transform: scale(0.97);
}

.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}


/* ==============================================
   4. Card Micro-interactions
   ============================================== */

.card {
  background: var(--color-card-bg, #f5f5f7);
  border-radius: 18px;
  padding: 40px 28px;
  border: 1px solid transparent;
  transition:
    transform var(--anim-normal) var(--ease-out),
    box-shadow var(--anim-normal) var(--ease-out),
    border-color var(--anim-normal) var(--ease-out),
    background var(--anim-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 113, 227, 0.15);
}

/* Service card specific enhancements */
.service-card {
  border: 1px solid transparent;
}

.service-card:hover .service-icon {
  transform: scale(1.08);
  box-shadow: var(--shadow-md);
}

.service-icon {
  transition:
    transform var(--anim-normal) var(--ease-out),
    box-shadow var(--anim-normal) var(--ease-out);
}

/* Process step card */
.step-card {
  text-align: center;
  background: var(--color-card-bg, #f5f5f7);
  border-radius: 18px;
  padding: 36px 24px;
  border: 1px solid transparent;
  transition:
    transform var(--anim-normal) var(--ease-out),
    box-shadow var(--anim-normal) var(--ease-out),
    border-color var(--anim-normal) var(--ease-out);
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 113, 227, 0.15);
}


/* ==============================================
   5. Image Micro-interactions
   ============================================== */

.img-hover {
  overflow: hidden;
  border-radius: 12px;
}

.img-hover img {
  transition:
    transform var(--anim-normal) var(--ease-out),
    filter var(--anim-normal) var(--ease-out);
  will-change: transform;
}

.img-hover:hover img {
  transform: scale(1.05);
  filter: brightness(1.05);
}

/* QR code image */
.wechat-qr {
  transition:
    transform var(--anim-normal) var(--ease-out),
    box-shadow var(--anim-normal) var(--ease-out);
}

.wechat-qr:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}


/* ==============================================
   6. Navigation Scroll Effect
   ============================================== */

.nav {
  transition:
    background var(--anim-slow) var(--ease-out),
    backdrop-filter var(--anim-slow) var(--ease-out),
    box-shadow var(--anim-slow) var(--ease-out),
    border-bottom-color var(--anim-slow) var(--ease-out);
}

.nav-scrolled {
  background: rgba(255, 255, 255, 0.85) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08) !important;
  border-bottom-color: rgba(0, 0, 0, 0.10) !important;
}


/* ==============================================
   7. Back-to-Top Button
   ============================================== */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border, #d2d2d7);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--anim-normal) var(--ease-out),
    visibility var(--anim-normal) var(--ease-out),
    transform var(--anim-normal) var(--ease-spring),
    box-shadow var(--anim-normal) var(--ease-out);
  color: var(--color-text, #1d1d1f);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  animation: btt-enter var(--anim-normal) var(--ease-out) both;
}

.back-to-top:hover {
  transform: scale(1.12);
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.98);
}

.back-to-top:active {
  transform: scale(0.95);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 480px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}


/* ==============================================
   8. Form Styles
   ============================================== */

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary, #6e6e73);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 17px;
  font-family: inherit;
  border: 1.5px solid var(--color-border, #d2d2d7);
  border-radius: 12px;
  background: var(--color-bg, #fff);
  color: var(--color-text, #1d1d1f);
  outline: none;
  transition:
    border-color var(--anim-fast) var(--ease-out),
    box-shadow var(--anim-fast) var(--ease-out),
    background var(--anim-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-accent, #0071E3);
  box-shadow: var(--glow-accent);
  background: #fff;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #aeaeb2;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236e6e73' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

/* Success state */
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
  animation: scale-in var(--anim-slow) var(--ease-out) both;
}

.form-success.show {
  display: block;
}

.form-success .success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #34C759;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
}

.form-success h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text, #1d1d1f);
}

.form-success p {
  font-size: 17px;
  color: var(--color-text-secondary, #6e6e73);
}


/* ==============================================
   9. Stat Counter (triggered by JS)
   ============================================== */

.stat-number {
  transition: color var(--anim-normal) var(--ease-out);
}

.stat-number.counting {
  animation: count-glow 0.3s ease-out;
}


/* ==============================================
   10. Process Flow (服务流程)
   ============================================== */

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 64px;
  position: relative;
  list-style: none;
  padding: 0;
}

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

.process-step .step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent, #0071E3);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 16px;
  transition:
    transform var(--anim-normal) var(--ease-spring),
    box-shadow var(--anim-normal) var(--ease-out);
}

.process-step:hover .step-number {
  transform: scale(1.1);
  box-shadow: 0 0 0 6px rgba(0, 113, 227, 0.15);
}

.process-step h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text, #1d1d1f);
}

.process-step p {
  font-size: 15px;
  color: var(--color-text-secondary, #6e6e73);
  line-height: 1.5;
  max-width: 200px;
  margin: 0 auto;
}

/* Arrow between steps (desktop) */
.process-arrow {
  display: none;
}

@media (min-width: 735px) {
  .process-arrow {
    display: block;
    position: absolute;
    top: 24px;
    color: var(--color-border, #d2d2d7);
    font-size: 24px;
    transform: translateX(-50%);
  }
}

@media (max-width: 734px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .process-steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}


/* ==============================================
   11. Mobile Hamburger Menu
   ============================================== */

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 101;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text, #1d1d1f);
  border-radius: 2px;
  transition:
    transform var(--anim-normal) var(--ease-out),
    opacity var(--anim-fast) var(--ease-out);
  transform-origin: center;
}

.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);
}

@media (max-width: 600px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height, 48px);
    left: 0;
    width: 100%;
    background: #ffffff;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border, #d2d2d7);
    transform: translateY(-110%);
    opacity: 0;
    transition:
      transform var(--anim-normal) var(--ease-out),
      opacity var(--anim-normal) var(--ease-out);
    pointer-events: none;
    z-index: 100;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: block;
    padding: 14px 20px;
    font-size: 17px;
    font-weight: 500;
    color: var(--color-text-secondary, #6e6e73);
  }

  .nav-links a:hover {
    color: var(--color-text, #1d1d1f);
    background: rgba(0, 0, 0, 0.03);
  }
}


/* ==============================================
   12. Section Separator Animation
   ============================================== */

.section-sep {
  transform-origin: center;
}

.section-sep.anim-visible {
  animation: shimmer var(--anim-slow) var(--ease-out) both;
}


/* ==============================================
   13. Reduced Motion Preference
   ============================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .anim-hidden {
    opacity: 1 !important;
    transform: none !important;
  }

  .card:hover,
  .service-card:hover,
  .step-card:hover {
    transform: none !important;
  }

  .btn:hover {
    transform: none !important;
  }
}


/* ==============================================
   14. Hero Section (Apple Style)
   ============================================== */

.hero {
  padding: 220px 0 140px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, #f5f5f7 100%);
}

.hero-title {
  font-size: 84px;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "PingFang SC", "Segoe UI", system-ui, sans-serif;
  color: #1d1d1f;
}

.hero-subtitle-wrapper {
  margin-bottom: 40px;
}

.hero-subtitle-line {
  font-size: 28px;
  line-height: 1.6;
  color: #6e6e73;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-subtitle-reveal 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.hero-subtitle-line:nth-child(1) { animation-delay: 0.3s; }
.hero-subtitle-line:nth-child(2) { animation-delay: 0.4s; }
.hero-subtitle-line:nth-child(3) { animation-delay: 0.5s; }

@keyframes hero-subtitle-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-cta-wrapper {
  margin-bottom: 56px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 18px 52px;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent, #0071E3);
  border-radius: 980px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.25);
}

.hero-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(0, 113, 227, 0.35);
  background: #0077ED;
}

.hero-cta:active {
  transform: scale(0.97);
}

.hero-bottom-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 0;
}

.hero-trust-divider {
  width: 1px;
  height: 48px;
  background: rgba(0, 0, 0, 0.1);
  margin: 0 28px;
  flex-shrink: 0;
}

.trust-layer {
  display: flex;
  align-items: center;
  gap: 0;
  background: #F7F9FC;
  border-radius: 12px;
  padding: 20px 32px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.trust-layer:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 24px;
}

.trust-divider {
  width: 1px;
  height: 36px;
  background: rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
}

.trust-card-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-deep-blue, #1a2744);
  line-height: 1.2;
  margin-bottom: 2px;
}

.trust-card-num.accent {
  color: var(--color-brand-orange, #E86C2C);
}

.trust-card-label {
  font-size: 14px;
  color: #6e6e73;
  font-weight: 500;
}

/* Hero animation delays */
.hero-title.anim-hidden {
  animation-delay: 0s;
}

.hero-subtitle-wrapper.anim-hidden {
  animation-delay: 0.3s;
}

.hero-cta-wrapper.anim-hidden {
  animation-delay: 0.6s;
}

.trust-layer.anim-hidden {
  animation-delay: 0.9s;
}

/* Responsive styles */
@media (max-width: 834px) {
  .hero-title {
    font-size: 56px;
  }
}

@media (max-width: 734px) {
  .hero {
    padding: 180px 0 80px;
  }

  .hero-title {
    font-size: 44px;
    line-height: 1.15;
  }

  .hero-subtitle-line {
    font-size: 22px;
  }

  .trust-layer {
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 20px;
  }

  .trust-item {
    padding: 0 16px;
  }

  .trust-divider {
    height: 28px;
  }

  .trust-card-num {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 120px 0 64px;
  }

  .hero-title {
    font-size: 34px;
    line-height: 1.2;
  }

  .hero-subtitle-line {
    font-size: 18px;
  }

  .hero-cta {
    padding: 16px 40px;
    font-size: 18px;
  }
}

/* ==============================================
   15. Misc Utilities
   ============================================== */

/* Smooth section anchor offset (account for fixed nav) */
.scroll-offset {
  scroll-margin-top: 80px;
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent, #0071E3);
  outline-offset: 2px;
}

/* Form error state */
.form-error {
  display: none;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 16px;
  font-size: 15px;
  color: #DC2626;
  line-height: 1.6;
  animation: fade-in var(--anim-fast) var(--ease-out) both;
}

.form-error.show {
  display: block;
}

/* Loading shimmer (for placeholder) */
@keyframes loading-pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

.loading-pulse {
  animation: loading-pulse 1.5s ease-in-out infinite;
}

/* ============================================================
   Testimonials (客户评价)
   ============================================================ */
#testimonials {
  padding: 100px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.testimonial-card {
  background: #fff;
  border-radius: 18px;
  padding: 36px 28px;
  transition: all var(--anim-normal) var(--ease-out);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.testimonial-stars {
  color: #f5a623;
  font-size: 18px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary, #6e6e73);
  margin-bottom: 20px;
  font-style: italic;
  margin: 0 0 20px 0;
  padding: 0;
  border: none;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.testimonial-author strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text, #1d1d1f);
}

.testimonial-author span {
  font-size: 13px;
  color: var(--color-text-secondary, #6e6e73);
}

@media (max-width: 734px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (min-width: 735px) and (max-width: 1068px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}