/* ============================================
   映刻网 — Design System
   Apple-inspired single page photography showcase
   ============================================ */

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

:root {
  --color-bg: #000000;
  --color-bg-elevated: #0a0a0a;
  --color-surface: #141414;
  --color-text-primary: #f5f5f7;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-tertiary: rgba(255, 255, 255, 0.4);
  --color-accent: #d4a853;
  --color-accent-hover: #e8c06a;
  --color-accent-glow: rgba(212, 168, 83, 0.25);
  --color-divider: rgba(255, 255, 255, 0.08);
  --font-display: 'Noto Serif SC', 'Songti SC', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-slow: 1.2s;
  --duration-normal: 0.8s;
  --duration-fast: 0.4s;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---------- Smooth Scroll Snap (optional feel) ---------- */
img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--duration-fast) var(--ease-out-expo);
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 48px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--duration-fast) var(--ease-out-expo);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
}

.nav-brand span {
  color: var(--color-accent);
}

.nav-slogan {
  font-size: 0.78rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.15em;
  font-weight: 300;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(212, 168, 83, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 100%, rgba(212, 168, 83, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 100px;
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.2);
  font-size: 0.8rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s var(--ease-out-expo) 0.3s forwards;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeInUp 1.2s var(--ease-out-expo) 0.5s forwards;
}

.hero-title .accent {
  background: linear-gradient(135deg, var(--color-accent), #f0d48a, var(--color-accent));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s ease-in-out infinite;
}

.hero-slogan {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  color: var(--color-text-secondary);
  letter-spacing: 0.25em;
  font-weight: 300;
  margin-bottom: 64px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1.2s var(--ease-out-expo) 0.7s forwards;
}

/* ---------- Fundraising Card ---------- */
.fundraise-card {
  position: relative;
  max-width: 580px;
  width: 100%;
  padding: 48px 40px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(40px);
  backdrop-filter: blur(40px);
  opacity: 0;
  transform: translateY(40px);
  animation: fadeInUp 1.2s var(--ease-out-expo) 0.9s forwards;
}

.fundraise-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 25px;
  background: linear-gradient(
    135deg,
    rgba(212, 168, 83, 0.15),
    transparent 40%,
    transparent 60%,
    rgba(212, 168, 83, 0.08)
  );
  z-index: -1;
  pointer-events: none;
}

.fundraise-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.15), rgba(212, 168, 83, 0.05));
  margin-bottom: 24px;
  font-size: 1.6rem;
}

.fundraise-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.fundraise-camera {
  color: var(--color-accent);
  font-weight: 900;
}

.fundraise-desc {
  font-size: 0.92rem;
  color: var(--color-text-tertiary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.fundraise-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--duration-fast) var(--ease-out-expo);
  position: relative;
  overflow: hidden;
  flex: 1;
  min-width: 140px;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--duration-fast);
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
}

.btn:hover::after {
  opacity: 1;
}

/* Alipay — Brand Blue */
.btn-alipay {
  background: linear-gradient(135deg, #1677FF, #0958d9);
  color: #fff;
  box-shadow: 0 4px 20px rgba(22, 119, 255, 0.25);
}

.btn-alipay:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(22, 119, 255, 0.4);
}

/* PayPal — Brand Navy */
.btn-paypal {
  background: linear-gradient(135deg, #0070ba, #003087);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 112, 186, 0.25);
}

.btn-paypal:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 112, 186, 0.4);
}

/* WeChat Pay — Brand Green */
.btn-wechat {
  background: linear-gradient(135deg, #07C160, #06ae56);
  color: #fff;
  box-shadow: 0 4px 20px rgba(7, 193, 96, 0.25);
}

.btn-wechat:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(7, 193, 96, 0.4);
}

.btn-icon {
  font-size: 1.15rem;
  display: flex;
  align-items: center;
}

/* ---------- Payment Modal ---------- */
body.modal-open {
  overflow: hidden;
}

.payment-modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s var(--ease-out-expo), visibility 0.28s;
}

.payment-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.payment-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.64);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.payment-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(92vw, 420px);
  border-radius: 18px;
  padding: 22px 22px 20px;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.96), rgba(8, 8, 8, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.42);
}

.payment-modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.06);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.payment-modal-kicker {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.payment-modal-title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.2;
  color: var(--color-text-primary);
}

.payment-modal-hint {
  margin: 0 0 14px;
  font-size: 0.88rem;
  color: var(--color-text-tertiary);
}

.payment-modal-image-wrap {
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#payment-qr-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  user-select: none;
}

/* ---------- Donation Confirm Modal ---------- */
.donation-confirm-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out-expo), visibility 0.25s;
}

.donation-confirm-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.donation-confirm-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.64);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.donation-confirm-dialog {
  position: relative;
  z-index: 1;
  width: min(92vw, 460px);
  border-radius: 18px;
  padding: 24px 22px 20px;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.96), rgba(8, 8, 8, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.42);
}

.donation-confirm-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.06);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.donation-confirm-kicker {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.donation-confirm-title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 1.22rem;
  line-height: 1.25;
  color: var(--color-text-primary);
}

.donation-confirm-text {
  margin: 0 0 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.9rem;
}

.donation-confirm-actions {
  display: flex;
  gap: 10px;
}

.btn-confirm-cancel {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-confirm-ok {
  background: linear-gradient(135deg, var(--color-accent), #c49a3e);
  color: #000;
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

/* ---------- Scroll Indicator ---------- */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: scrollIndicatorIn 1s var(--ease-out-expo) 1.3s forwards;
  text-align: center;
}

.scroll-indicator span {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ---------- Section Titles ---------- */
.section-header {
  text-align: center;
  padding: 120px 24px 60px;
}

.section-overline {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 500;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-tertiary);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Photo Gallery ---------- */
.gallery {
  padding: 0 0 160px;
}

.photo-section {
  position: relative;
  width: 100%;
  padding: 0 24px;
  margin-bottom: 160px;
}

.photo-section:last-child {
  margin-bottom: 0;
}

.photo-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(80px) scale(0.95);
  transition:
    opacity var(--duration-slow) var(--ease-out-expo),
    transform var(--duration-slow) var(--ease-out-expo);
}

.photo-container.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.photo-container img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 6s var(--ease-out-quint);
}

.photo-container:hover img {
  transform: scale(1.03);
}

/* Photo overlay gradient */
.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  pointer-events: none;
}

.photo-meta {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-fast) var(--ease-out-expo);
}

.photo-container:hover .photo-meta,
.photo-container.is-visible .photo-meta {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.3s;
}

.photo-meta-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.photo-meta-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.photo-meta-tag {
  display: inline-flex;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.1);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

/* ---------- Alternating Layout ---------- */
.photo-section:nth-child(even) .photo-container {
  transform: translateY(80px) scale(0.95);
}

.photo-section:nth-child(even) .photo-container.is-visible {
  transform: translateY(0) scale(1);
}

/* ---------- Parallax Spacer ---------- */
.parallax-divider {
  position: relative;
  height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.parallax-divider .divider-text {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-weight: 200;
  color: var(--color-text-tertiary);
  letter-spacing: 0.15em;
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--duration-slow) var(--ease-out-expo);
}

.parallax-divider.is-visible .divider-text {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Footer ---------- */
.footer {
  position: relative;
  padding: 80px 24px;
  text-align: center;
  border-top: 1px solid var(--color-divider);
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.footer-brand span {
  background: linear-gradient(135deg, var(--color-accent), #f0d48a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-slogan {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.2em;
  margin-bottom: 32px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast);
}

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

.footer-copyright {
  font-size: 0.78rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.05em;
}

/* ---------- Keyframes ---------- */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

@keyframes scrollPulse {
  0% { opacity: 0.3; transform: scaleY(0.5); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0.3; transform: scaleY(0.5); transform-origin: top; }
}

@keyframes scrollIndicatorIn {
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav {
    padding: 0 20px;
    height: 48px;
  }

  .nav-slogan {
    display: none;
  }

  .hero {
    padding: 100px 20px 80px;
  }

  .fundraise-card {
    padding: 32px 24px;
  }

  .fundraise-buttons {
    flex-direction: column;
  }

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

  .photo-section {
    padding: 0 16px;
    margin-bottom: 80px;
  }

  .photo-meta {
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .section-header {
    padding: 80px 20px 40px;
  }

  .parallax-divider {
    height: 25vh;
  }

  .footer {
    padding: 60px 20px;
  }

  .footer-links {
    gap: 20px;
  }

  .payment-modal-dialog {
    width: min(94vw, 400px);
    padding: 20px 18px 18px;
  }

  .payment-modal-image-wrap {
    min-height: 210px;
  }

  .donation-confirm-dialog {
    width: min(94vw, 430px);
    padding: 20px 18px 18px;
  }

  .donation-confirm-actions {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .photo-container {
    border-radius: 14px;
  }

  .fundraise-card {
    border-radius: 18px;
  }
}

/* ---------- Loading State ---------- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s var(--ease-out-expo), visibility 0.6s;
}

.page-loader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ---------- Network Quality Indicator ---------- */
.network-indicator {
  position: fixed;
  top: 72px;
  right: 24px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 12px;
  background: rgba(20, 20, 20, 0.85);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateX(120%);
  transition:
    opacity 0.5s var(--ease-out-expo),
    transform 0.5s var(--ease-out-expo);
  pointer-events: none;
}

.network-indicator.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.network-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34c759;
  box-shadow: 0 0 8px rgba(52, 199, 89, 0.4);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

.network-label {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

/* ---------- Adaptive Loading Transitions ---------- */
.photo-container img {
  transition:
    transform 6s var(--ease-out-quint),
    filter 0.6s var(--ease-out-expo);
}

/* Subtle visual cue: slightly soften on low-quality mode */
body[data-network-quality="low"] .photo-container img {
  filter: contrast(0.97);
}

/* ---------- Custom Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}