/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0D0D0D;
  --dark: #141414;
  --dark-2: #1C1C1C;
  --dark-3: #242424;
  --white: #FFFFFF;
  --off-white: #F5F2ED;
  --cream: #EDE8DF;
  --gray: #888888;
  --gray-light: #BBBBBB;
  --border-dark: rgba(255,255,255,0.08);
  --border-light: rgba(0,0,0,0.08);
  --accent: #C8A96E;
  --accent-dark: #A8843E;
  --text-dark: #1A1A1A;
  --text-muted: #666666;
  --sans: 'Noto Sans SC', -apple-system, sans-serif;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--white);
  color: var(--text-dark);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ===== NAV ===== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(13,13,13,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.06em;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.1em;
  font-weight: 300;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--white); }
.btn-nav {
  background: var(--accent) !important;
  color: var(--black) !important;
  padding: 8px 22px !important;
  font-size: 0.75rem !important;
  font-weight: 500 !important;
  letter-spacing: 0.1em !important;
  transition: background var(--transition) !important;
}
.btn-nav:hover { background: var(--accent-dark) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: var(--transition);
}
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 16px 48px 28px;
  border-top: 1px solid var(--border-dark);
  background: var(--dark);
}
.mobile-link {
  padding: 14px 0;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  border-bottom: 1px solid var(--border-dark);
}
.mobile-link.highlight { color: var(--accent); border-bottom: none; padding-top: 18px; }
.mobile-menu.open { display: flex; }

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  background: var(--black);
  position: relative;
  display: flex;
  align-items: stretch;
  overflow: hidden;
}

.hero-body {
  position: relative;
  z-index: 2;
  flex: 0 0 55%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 120px 64px 100px 80px;
}

.hero-photo-right {
  flex: 0 0 45%;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
}
.hero-photo-right img {
  width: auto;
  height: 88%;
  max-height: 88vh;
  object-fit: contain;
  object-position: bottom center;
  display: block;
  align-self: flex-end;
}
.hero-photo-right::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(to right, var(--black) 0%, transparent 25%),
    linear-gradient(to top, var(--black) 0%, transparent 8%);
}
.hero-tag {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  font-weight: 400;
}
.hero-title {
  font-size: clamp(2.8rem, 6vw, 6rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.hero-title-sub {
  font-size: clamp(1.8rem, 4vw, 4rem);
  font-weight: 200;
  line-height: 1.2;
  color: rgba(255,255,255,0.6);
  margin-bottom: 40px;
  letter-spacing: 0.02em;
}
.hero-title-sub em {
  font-style: normal;
  color: var(--accent);
}
.hero-desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.5);
  max-width: 480px;
  line-height: 1.9;
  margin-bottom: 48px;
  font-weight: 300;
}
.hero-desc strong { color: rgba(255,255,255,0.8); font-weight: 500; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--black);
  padding: 15px 36px;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-secondary {
  display: inline-block;
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.7);
  padding: 15px 36px;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  font-weight: 300;
  transition: border-color var(--transition), color var(--transition);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ===== ABOUT ===== */
#about {
  background: var(--off-white);
  padding: 120px 0;
}
.about-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}
.about-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 20px;
  font-weight: 500;
}
.about-heading {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.about-heading-en {
  font-size: 0.8rem;
  color: var(--gray);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 32px;
  font-weight: 300;
}
.about-left p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.95;
  margin-bottom: 18px;
  font-weight: 300;
}
.about-creds {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
}
.cred-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-light);
}
.cred-row:first-child { border-top: 1px solid var(--border-light); }
.cred-icon { font-size: 1rem; margin-top: 2px; opacity: 0.6; flex-shrink: 0; }
.cred-row strong { display: block; font-size: 0.88rem; color: var(--text-dark); font-weight: 500; }
.cred-row span { font-size: 0.8rem; color: var(--text-muted); font-weight: 300; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.06);
  margin-bottom: 32px;
}
.stat-box {
  background: var(--white);
  padding: 36px 28px;
  text-align: center;
}
.stat-box strong {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-box span { font-size: 0.75rem; color: var(--gray); letter-spacing: 0.1em; font-weight: 300; }

.about-highlights {
  display: flex;
  flex-direction: column;
  margin-bottom: 32px;
}
.hl-row {
  padding: 18px 0;
  border-bottom: 1px solid var(--border-light);
}
.hl-label {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 500;
  margin-bottom: 6px;
}
.hl-row p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.8;
  font-weight: 300;
}
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 0.72rem;
  color: var(--text-muted);
  border: 1px solid rgba(0,0,0,0.12);
  padding: 5px 14px;
  letter-spacing: 0.04em;
  font-weight: 300;
}

/* ===== METHOD ===== */
#method {
  background: var(--dark);
  padding: 120px 0;
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}
.section-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 400;
  opacity: 0.8;
}
.section-heading {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 16px;
}
.section-heading.dark { color: var(--text-dark); }
.section-sub {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.4);
  max-width: 680px;
  line-height: 1.9;
  margin-bottom: 80px;
  font-weight: 300;
}

.three-layers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-dark);
  border: 1px solid var(--border-dark);
  margin-bottom: 80px;
}
.layer-card {
  background: var(--dark-2);
  padding: 52px 40px;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}
.layer-card:hover { background: var(--dark-3); }
.layer-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.layer-card:hover::before { opacity: 1; }
.layer-num {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 20px;
  font-weight: 400;
}
.layer-card h3 {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.layer-card p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.95;
  font-weight: 300;
}

.herbs-banner {
  background: var(--accent);
  padding: 52px 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  margin-bottom: 80px;
}
.herbs-banner-left strong {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--black);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.herbs-banner-left p {
  font-size: 0.88rem;
  color: rgba(0,0,0,0.65);
  line-height: 1.9;
  max-width: 600px;
  font-weight: 300;
}
.herbs-banner-right {
  font-size: 3rem;
  font-weight: 700;
  color: rgba(0,0,0,0.12);
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.method-quote {
  border-left: 3px solid var(--accent);
  padding: 0 0 0 40px;
  max-width: 900px;
}
.method-quote blockquote {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 300;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
}
.method-quote cite {
  display: block;
  margin-top: 16px;
  font-size: 0.72rem;
  font-style: normal;
  color: var(--accent);
  letter-spacing: 0.15em;
  opacity: 0.7;
}

/* ===== PROJECTS ===== */
#projects {
  background: var(--white);
  padding: 120px 0;
}
.projects-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  margin-bottom: 72px;
}
.projects-heading {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-dark);
  margin-bottom: 0;
}
.projects-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.06);
}
.project-card {
  background: var(--white);
  padding: 48px 36px;
  transition: background var(--transition);
}
.project-card:hover { background: var(--off-white); }
.project-card-wide {
  grid-column: span 3;
  border-top: 1px solid rgba(0,0,0,0.06);
  display: grid;
  grid-template-columns: 200px 1fr auto;
  align-items: center;
  gap: 48px;
}
.project-num {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--gray);
  margin-bottom: 20px;
  font-weight: 300;
}
.project-card-wide .project-num { margin-bottom: 0; }
.project-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 14px;
}
.project-card p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 20px;
  font-weight: 300;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.project-tags span {
  font-size: 0.68rem;
  color: var(--accent-dark);
  border: 1px solid rgba(200, 169, 110, 0.3);
  padding: 3px 12px;
  letter-spacing: 0.05em;
  font-weight: 400;
}
.book-cta {
  display: inline-block;
  background: var(--text-dark);
  color: var(--white);
  padding: 12px 28px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: 400;
  white-space: nowrap;
  transition: background var(--transition);
}
.book-cta:hover { background: var(--dark-3); }

/* ===== BRAND ===== */
#brand {
  background: var(--dark);
  padding: 120px 0;
}
.brand-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: center;
}
.brand-title-big {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.brand-subtitle {
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 32px;
  opacity: 0.7;
}
.brand-left p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.95;
  margin-bottom: 32px;
  font-weight: 300;
}
.brand-list {
  list-style: none;
  margin-bottom: 48px;
}
.brand-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border-dark);
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  font-weight: 300;
}
.brand-list li::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--accent);
  flex-shrink: 0;
}
.brand-card {
  background: var(--dark-2);
  border: 1px solid var(--border-dark);
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.brand-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.brand-card-zh {
  display: block;
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}
.brand-card-en {
  display: block;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.brand-card-tagline {
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.7;
}

/* ===== BELIEF ===== */
#belief {
  background: var(--off-white);
  padding: 140px 0;
}
.belief-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 48px;
  text-align: center;
}
.belief-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 40px;
  font-weight: 500;
}
.belief-quote {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 300;
  color: var(--text-dark);
  line-height: 1.7;
  margin-bottom: 40px;
  letter-spacing: 0.01em;
}
.belief-divider {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 0 auto 40px;
}
.belief-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 2;
  font-weight: 300;
}
.belief-sub strong { color: var(--text-dark); font-weight: 600; }

/* ===== CONTACT ===== */
#contact {
  background: var(--black);
  padding: 120px 0;
}
.contact-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}
.contact-heading {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 20px;
}
.contact-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.35);
  line-height: 1.95;
  font-weight: 300;
}
.contact-rows { display: flex; flex-direction: column; }
.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--border-dark);
  cursor: pointer;
  transition: border-color var(--transition);
}
.contact-row:first-child { border-top: 1px solid var(--border-dark); }
.contact-row:hover { border-bottom-color: var(--accent); }
.contact-row-label {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 300;
}
.contact-row-val {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  font-weight: 300;
  transition: color var(--transition);
}
.contact-row:hover .contact-row-val { color: var(--accent); }

/* ===== FOOTER ===== */
footer {
  background: var(--dark);
  padding: 48px;
  text-align: center;
  border-top: 1px solid var(--border-dark);
}
.footer-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.footer-sub {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.12);
  letter-spacing: 0.1em;
}
.footer-sub a { color: rgba(255,255,255,0.2); }
.footer-sub a:hover { color: var(--accent); }

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
  .about-inner,
  .brand-inner,
  .contact-inner { grid-template-columns: 1fr; gap: 60px; }
  .three-layers { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .project-card-wide { grid-column: span 2; grid-template-columns: 1fr; gap: 20px; }
  .herbs-banner { flex-direction: column; }
  .herbs-banner-right { font-size: 2rem; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-inner { padding: 0 24px; }
  .mobile-menu { padding: 16px 24px 24px; }
  .hero-body { padding: 0 24px 80px; }
  .about-inner, .projects-header, .projects-grid,
  .section-inner, .brand-inner, .belief-inner,
  .contact-inner { padding-left: 24px; padding-right: 24px; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card-wide { grid-column: span 1; }
  #about, #method, #projects, #brand, #belief, #contact { padding: 80px 0; }
  footer { padding: 40px 24px; }
}