/* ============================================
   光影空间 · 酒店摄影作品集
   ============================================ */

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

:root {
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-surface2: #1a1a1a;
  --color-border: #2a2a2a;
  --color-text: #e8e8e8;
  --color-text2: #999;
  --color-text3: #666;
  --color-accent: #c9a96e;
  --color-accent2: #b08d4f;
  --font-serif: 'Noto Serif SC', 'Georgia', serif;
  --font-sans: 'Inter', 'PingFang SC', sans-serif;
  --nav-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

#navbar.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

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

.nav-links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text2);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { width: 100%; }

/* Mobile Menu */
.menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.menu-btn span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(20px);
  padding: 30px 40px;
  flex-direction: column;
  gap: 20px;
}

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

.mobile-menu a {
  font-size: 1rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text2);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

/* ============================================
   Hero
   ============================================ */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1510 50%, #0a0a0a 100%);
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 30% 40%, rgba(201, 169, 110, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 60%, rgba(201, 169, 110, 0.04) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 0 20px;
}

.hero-subtitle {
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: var(--color-accent);
  margin-bottom: 24px;
  font-weight: 500;
}

#hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-text2);
  max-width: 480px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-btn {
  display: inline-block;
  padding: 14px 48px;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: var(--transition);
}

.hero-btn:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text3);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
}

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

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================
   Stats
   ============================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-item {
  text-align: center;
  padding: 48px 20px;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-accent);
}

.stat-plus {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--color-accent);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text3);
  letter-spacing: 0.15em;
  margin-top: 8px;
  text-transform: uppercase;
}

/* ============================================
   Sections Common
   ============================================ */
.section-header {
  text-align: center;
  padding: 100px 20px 60px;
}

.section-tag {
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 500;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--color-text2);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ============================================
   Gallery
   ============================================ */
#gallery {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.filter-bar {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 8px 24px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-text3);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Masonry Grid */
.masonry {
  columns: 3;
  column-gap: 16px;
  display: none;
}

.masonry.has-items { display: block; }

.masonry-item {
  break-inside: avoid;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.masonry-item:nth-child(1) { animation-delay: 0s; }
.masonry-item:nth-child(2) { animation-delay: 0.08s; }
.masonry-item:nth-child(3) { animation-delay: 0.16s; }
.masonry-item:nth-child(4) { animation-delay: 0.24s; }
.masonry-item:nth-child(5) { animation-delay: 0.32s; }
.masonry-item:nth-child(6) { animation-delay: 0.4s; }
.masonry-item:nth-child(n+7) { animation-delay: 0.48s; }

@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

.masonry-item img {
  width: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.masonry-item:hover img {
  transform: scale(1.05);
}

.item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}

.masonry-item:hover .item-overlay { opacity: 1; }

.item-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
}

.item-cat {
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-top: 4px;
  text-transform: uppercase;
}

/* Placeholder */
.placeholder-tip {
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text3);
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.placeholder-tip h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-text2);
  margin-bottom: 12px;
}

.placeholder-tip p {
  font-size: 0.9rem;
  line-height: 1.8;
}

.placeholder-tip code {
  background: var(--color-surface2);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--color-accent);
}

.placeholder-tip.hidden { display: none; }

/* ============================================
   Videos
   ============================================ */
#videos {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.video-grid:not(:empty) ~ #videoPlaceholderTip { display: none; }

.video-card {
  position: relative;
  border-radius: 2px;
  overflow: hidden;
  background: var(--color-surface);
  aspect-ratio: 16/9;
}

.video-card video,
.video-card iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-card .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  transition: var(--transition);
  cursor: pointer;
}

.video-card .play-overlay:hover {
  background: rgba(0,0,0,0.1);
}

.play-btn-icon {
  width: 64px;
  height: 64px;
  border: 2px solid rgba(255,255,255,0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.play-btn-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent rgba(255,255,255,0.9);
  margin-left: 4px;
}

.video-card .play-overlay:hover .play-btn-icon {
  border-color: var(--color-accent);
  transform: scale(1.1);
}

.video-title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  font-family: var(--font-serif);
  font-size: 1rem;
}

/* ============================================
   About
   ============================================ */
#about {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 0;
}

.about-image {
  position: relative;
}

.about-img-placeholder {
  aspect-ratio: 3/4;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text3);
  font-size: 0.9rem;
}

.about-img-placeholder small {
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--color-text3);
}

.about-img-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text .section-tag { text-align: left; }

.about-text h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin-bottom: 24px;
}

.about-text p {
  color: var(--color-text2);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

.about-tags span {
  padding: 6px 18px;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  font-size: 0.8rem;
  color: var(--color-text2);
  letter-spacing: 0.05em;
}

.about-equip h4 {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.about-equip p {
  color: var(--color-text3);
  font-size: 0.9rem;
}

/* ============================================
   Contact
   ============================================ */
#contact {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 40px 120px;
}

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

.contact-card {
  text-align: center;
  padding: 48px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.contact-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.contact-card h4 {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--color-text2);
  font-size: 0.95rem;
}

/* ============================================
   Footer
   ============================================ */
footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text3);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

/* ============================================
   Lightbox
   ============================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.open {
  display: flex;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2.5rem;
  color: var(--color-text2);
  transition: color var(--transition);
  z-index: 10;
}

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

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: var(--color-text2);
  padding: 20px;
  transition: color var(--transition);
  z-index: 10;
}

.lightbox-prev { left: 10px; }
.lightbox-next { right: 10px; }
.lightbox-prev:hover,
.lightbox-next:hover { color: var(--color-text); }

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox-info {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-text2);
  font-size: 0.9rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .masonry { columns: 2; }
  .about-grid { gap: 40px; }
}

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

  .masonry { columns: 2; column-gap: 10px; }
  .masonry-item { margin-bottom: 10px; }

  .stats { grid-template-columns: repeat(3, 1fr); }
  .stat-item { padding: 32px 12px; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 0;
  }

  .video-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 16px; }

  #gallery, #videos, #about, #contact { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
}

@media (max-width: 480px) {
  .masonry { columns: 1; }
  .filter-bar { gap: 6px; }
  .filter-btn { padding: 6px 16px; font-size: 0.75rem; }
}