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

:root {
  --black: #0a0a0a;
  --dark: #111111;
  --mid: #1e1e1e;
  --border: #2a2a2a;
  --muted: #666;
  --silver: #999;
  --light: #e8e4de;
  --white: #f5f2ee;
  --accent: #c9a96e;
  --accent-light: #e8d5b0;
  --font-en: 'Cormorant Garamond', 'Georgia', serif;
  --font-ui: 'Inter', sans-serif;
  --font-zh: 'Noto Serif SC', serif;
  --nav-h: 64px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--light);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.65;
  overflow-x: hidden;
}

img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── Language ── */
[data-lang="en"] .zh-text { display: none; }
[data-lang="en"] .en-text { display: block !important; }
[data-lang="zh"] .zh-text { display: block; }
[data-lang="zh"] .en-text { display: none !important; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── NAV ── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 100;
  transition: background 0.4s, backdrop-filter 0.4s;
}
#navbar.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--white);
}
.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--silver);
  transition: color 0.25s;
}
.nav-links a:hover { color: var(--white); }
.lang-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--silver);
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.25s;
  border-radius: 2px;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-burger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--silver);
  transition: all 0.3s;
}

/* ── MOBILE MENU ── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-en);
  font-size: 32px;
  font-style: italic;
  color: var(--light);
  letter-spacing: 0.05em;
}

/* ── HERO ── */
.hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-img {
  position: absolute;
  inset: 0;
}
.hero-img img {
  object-position: center 30%;
  transform: scale(1.04);
  transition: transform 8s ease;
}
.hero:hover .hero-img img { transform: scale(1); }
.hero-vignette {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10,10,10,0.15) 0%,
    rgba(10,10,10,0.1) 40%,
    rgba(10,10,10,0.6) 80%,
    rgba(10,10,10,0.85) 100%
  );
}
.hero-text {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 720px;
}
.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-text h1 {
  font-family: var(--font-en);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 20px;
}
.hero-text h1 em {
  font-style: italic;
  color: var(--accent-light);
}
.hero-sub {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 40px;
}
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: all 0.3s;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--black);
}
.btn-primary.full { width: 100%; text-align: center; }
.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--accent));
  margin: 0 auto;
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ── SECTION COMMON ── */
.section-head {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
  padding: 0 24px;
}
.section-head.light { color: var(--black); }
.section-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-head h2 {
  font-family: var(--font-en);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 16px;
}
.section-head.light h2 { color: var(--black); }
.section-head p {
  font-size: 14px;
  color: var(--silver);
  line-height: 1.7;
}
.section-head.light p { color: #555; }

/* ── PORTFOLIO ── */
.portfolio {
  padding: 120px 40px 100px;
  max-width: 1400px;
  margin: 0 auto;
}

/* Filters */
.filters {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}
.filter {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--silver);
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 9px 22px;
  cursor: pointer;
  transition: all 0.25s;
  border-radius: 2px;
}
.filter:hover { border-color: var(--silver); color: var(--white); }
.filter.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--black);
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: 10px;
}
.card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--mid);
}
.card.tall { grid-row: span 2; }
.card.wide { grid-column: span 2; }
.card img {
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.card:hover img { transform: scale(1.06); }
.card-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px 18px 18px;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
  transform: translateY(8px);
  opacity: 0;
  transition: all 0.35s ease;
}
.card:hover .card-info { opacity: 1; transform: translateY(0); }
.card-cat {
  display: block;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}
.card-info p {
  font-size: 13px;
  color: var(--white);
  font-family: var(--font-en);
  font-style: italic;
}
.card.hidden { display: none; }

/* ── ROUTES ── */
.routes {
  background: var(--white);
  padding: 120px 40px;
}
.routes .section-label { color: var(--accent); }
.routes-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.route-card {
  background: var(--black);
  padding: 40px 36px;
  display: flex;
  gap: 20px;
  transition: background 0.3s;
}
.route-card:hover { background: var(--mid); }
.route-num {
  font-family: var(--font-en);
  font-size: 48px;
  font-weight: 300;
  color: var(--border);
  line-height: 1;
  flex-shrink: 0;
  width: 56px;
}
.route-body h3 {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 6px;
  line-height: 1.3;
}
.route-time {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.route-body ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.route-body li {
  font-size: 13px;
  color: var(--silver);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}
.route-body li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--border);
}
.route-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--accent);
  font-style: italic;
  font-family: var(--font-en);
}

/* ── ABOUT ── */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 80vh;
}
.about-img-wrap {
  position: relative;
  overflow: hidden;
}
.about-img-wrap img {
  object-position: center top;
  transition: transform 0.8s ease;
}
.about-img-wrap:hover img { transform: scale(1.04); }
.about-text {
  background: var(--dark);
  padding: 80px 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}
.about-text h2 {
  font-family: var(--font-en);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 300;
  color: var(--white);
  line-height: 1.1;
}
.about-text p {
  font-size: 15px;
  color: var(--silver);
  line-height: 1.8;
}
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.about-tags span {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 16px;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 2px;
}

/* ── CONTACT ── */
.contact {
  padding: 120px 40px;
  background: var(--black);
}
.contact-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.contact-left h2 {
  font-family: var(--font-en);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.15;
}
.contact-left > p {
  font-size: 14px;
  color: var(--silver);
  line-height: 1.8;
  margin-bottom: 40px;
}
.contact-links { display: flex; flex-direction: column; gap: 20px; }
.contact-link-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.cl-icon { font-size: 20px; margin-top: 2px; }
.contact-link-item strong {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 2px;
}
.contact-link-item p { font-size: 13px; color: var(--silver); }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--mid);
  border: 1px solid var(--border);
  color: var(--light);
  font-family: var(--font-ui);
  font-size: 14px;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.25s;
  border-radius: 2px;
  width: 100%;
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group select option { background: var(--mid); }
.form-success {
  display: none;
  text-align: center;
  padding: 48px;
  border: 1px solid var(--border);
}
.form-success.show { display: block; }
.success-icon {
  width: 48px; height: 48px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent);
  font-size: 20px;
}
.form-success p { color: var(--silver); line-height: 1.7; }

/* ── FOOTER ── */
.footer {
  text-align: center;
  padding: 60px 24px;
  border-top: 1px solid var(--border);
  background: var(--black);
}
.footer-logo {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--white);
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}
.footer-copy { font-size: 12px; color: var(--border); }

/* ── LIGHTBOX ── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.96);
  display: none;
  align-items: center;
  justify-content: center;
}
.lightbox.open { display: flex; }
.lb-img-wrap {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
}
.lb-img-wrap img {
  max-width: 90vw;
  max-height: 85vh;
  width: auto;
  height: auto;
  object-fit: contain;
}
.lb-caption {
  text-align: center;
  padding: 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver);
  font-style: italic;
  font-family: var(--font-en);
}
.lb-close {
  position: fixed;
  top: 24px; right: 28px;
  background: none;
  border: none;
  color: var(--silver);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.2s;
  z-index: 201;
}
.lb-close:hover { color: var(--white); }
.lb-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--silver);
  font-size: 48px;
  cursor: pointer;
  transition: color 0.2s;
  z-index: 201;
  padding: 20px;
  line-height: 1;
  font-family: var(--font-en);
  font-weight: 300;
}
.lb-nav:hover { color: var(--white); }
.lb-prev { left: 12px; }
.lb-next { right: 12px; }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .grid { grid-template-columns: repeat(3, 1fr); }
  .routes-grid { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; }
  .about-img-wrap { height: 60vw; max-height: 500px; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  #navbar { padding: 0 24px; }
  .nav-links { display: none; }
  .lang-toggle { margin-left: auto; }
  .nav-burger { display: flex; }

  .hero-text h1 { font-size: clamp(38px, 10vw, 64px); }

  .portfolio { padding: 80px 16px 60px; }
  .grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 220px;
  }
  .card.wide { grid-column: span 2; }

  .routes { padding: 80px 16px; }
  .routes-grid { grid-template-columns: 1fr; }
  .route-card { padding: 28px 24px; }

  .about-text { padding: 48px 24px; }

  .contact { padding: 80px 16px; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 300px;
  }
  .card.wide, .card.tall { grid-column: span 1; grid-row: span 1; }
}