/* ============================================================
   布局 & 导航 — 古典画廊
   ============================================================ */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--container-padding);
  transition: background-color 0.6s var(--ease-out-expo),
              box-shadow 0.6s var(--ease-out-expo),
              transform 0.5s var(--ease-out-expo);
  will-change: transform, background-color;
}

.nav.scrolled {
  background-color: rgba(20, 17, 14, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

.nav.hidden {
  transform: translateY(-100%);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-classical);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 48px;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color var(--dur-fast) var(--ease-out-expo);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--dur-medium) var(--ease-out-expo);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-light);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--text-primary);
  transition: transform var(--dur-fast) var(--ease-out-expo),
              opacity var(--dur-fast) var(--ease-out-expo);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  will-change: transform;
  filter: brightness(0.35) saturate(0.6);
}

/* 横图：左右羽化 */
@media (orientation: landscape) {
  .hero-bg {
    mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  }
}

/* 竖图：上下羽化 */
@media (orientation: portrait) {
  .hero-bg {
    mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
  }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 40%, rgba(20, 17, 14, 0.5) 80%),
    linear-gradient(180deg, rgba(20, 17, 14, 0.1) 0%, transparent 40%, rgba(20, 17, 14, 0.6) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  padding: 0 24px;
}

.hero-eyebrow {
  font-family: var(--font-classical);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s var(--ease-out-expo) 0.3s forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 100px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1.2s var(--ease-out-expo) 0.5s forwards;
}

.hero-title em {
  font-style: italic;
  color: var(--accent-light);
}

.hero-line {
  width: 120px;
  height: 1px;
  background: var(--gold-line);
  margin: 0 auto 32px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out-expo) 0.8s forwards;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s var(--ease-out-expo) 1s forwards;
}

.hero-scroll {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out-expo) 1.5s forwards;
}

.hero-scroll span {
  font-family: var(--font-classical);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* --- Section Layout --- */
.section {
  padding: var(--section-gap) var(--container-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.section-title em {
  font-style: italic;
  color: var(--accent-light);
}

.section-desc {
  font-family: var(--font-body);
  font-size: 20px;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

/* --- About Section --- */
.about-grid {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about-text h3 {
  font-size: clamp(28px, 4vw, 42px);
  margin-bottom: 32px;
  color: var(--text-primary);
}

.about-text p {
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.9;
  margin-bottom: 24px;
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 80px var(--container-padding) 48px;
  border-top: 1px solid var(--border-subtle);
}

.footer-brand {
  font-family: var(--font-classical);
  font-size: 20px;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.footer-text {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 48px;
}

.footer-social a {
  color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease-out-expo);
}

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

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* --- CTA Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-classical);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bg-deep);
  background: var(--accent);
  padding: 16px 40px;
  transition: background var(--dur-fast) var(--ease-out-expo),
              transform var(--dur-fast) var(--ease-out-expo),
              box-shadow var(--dur-fast) var(--ease-out-expo);
}

.btn:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-gold);
}

.btn-ghost:hover {
  background: rgba(201, 160, 80, 0.08);
  color: var(--accent-light);
  border-color: var(--border-gold-hover);
}

/* --- Contact Modal --- */
.contact-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease-out-expo);
}

.contact-modal.open {
  opacity: 1;
  pointer-events: all;
}

.contact-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 8, 6, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.contact-modal-card {
  position: relative;
  background: var(--bg-primary);
  border: 1px solid var(--border-gold);
  padding: 64px 56px;
  text-align: center;
  max-width: 440px;
  width: calc(100% - 48px);
  z-index: 1;
}

.contact-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  transition: color 0.3s;
}

.contact-modal-close:hover {
  color: var(--accent-light);
}

.contact-modal-icon {
  font-size: 36px;
  color: var(--accent);
  margin-bottom: 16px;
}

.contact-modal-card h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 0;
}

.contact-modal-card .gold-divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  margin: 20px auto;
}

.contact-modal-email {
  font-family: var(--font-sans);
  font-size: 18px;
  color: var(--accent-light);
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  word-break: break-all;
}

.contact-modal-hint {
  font-size: 13px;
  color: var(--text-muted);
}

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

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.3); }
}

@keyframes goldShimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes gentleFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* ============================================================
   引言语录区 — 全宽暗色 + 大字排版
   ============================================================ */
.quote-section {
  position: relative;
  padding: 140px var(--container-padding);
  text-align: center;
  overflow: hidden;
}

.quote-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(201, 160, 80, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.quote-ornament {
  font-family: var(--font-display);
  font-size: 160px;
  line-height: 1;
  color: var(--accent);
  opacity: 0.04;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  user-select: none;
}

.quote-text {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  font-style: italic;
  color: var(--text-primary);
  max-width: 800px;
  margin: 0 auto 32px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
}

.quote-text::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: 120px;
  color: var(--accent);
  opacity: 0.2;
  position: absolute;
  top: -60px;
  left: -40px;
  line-height: 1;
  pointer-events: none;
}

.quote-author {
  font-family: var(--font-classical);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.quote-author::before {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: var(--accent);
  margin: 0 auto 16px;
  opacity: 0.4;
}

/* --- Section Divider with ornament --- */
.section-ornament-divider {
  position: relative;
  height: 1px;
  max-width: var(--container-max);
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--border-gold) 20%, var(--border-gold) 80%, transparent);
}

.section-ornament-divider::after {
  content: '◈';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--accent);
  font-size: 12px;
  background: var(--bg-deep);
  padding: 0 16px;
  opacity: 0.6;
}

/* ============================================================
   创作哲学区 — 三列卡片
   ============================================================ */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.philosophy-card {
  text-align: center;
  padding: 56px 32px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  position: relative;
  transition: border-color 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo);
}

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

.philosophy-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.6s var(--ease-out-expo);
}

.philosophy-card:hover::before {
  opacity: 0.6;
}

.philosophy-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-gold);
  border-radius: 50%;
  color: var(--accent);
  transition: background 0.6s var(--ease-out-expo),
              box-shadow 0.6s var(--ease-out-expo);
}

.philosophy-card:hover .philosophy-icon {
  background: rgba(201, 160, 80, 0.08);
  box-shadow: 0 0 24px var(--accent-glow);
}

.philosophy-icon svg {
  width: 24px;
  height: 24px;
}

.philosophy-card h4 {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-weight: 400;
}

.philosophy-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* --- Corner accent for cards --- */
.philosophy-card .card-corner {
  position: absolute;
  width: 20px;
  height: 20px;
  opacity: 0;
  transition: opacity 0.6s var(--ease-out-expo);
  pointer-events: none;
}

.philosophy-card:hover .card-corner { opacity: 0.5; }

.philosophy-card .card-corner.tl { top: 8px; left: 8px; border-top: 1px solid var(--accent); border-left: 1px solid var(--accent); }
.philosophy-card .card-corner.tr { top: 8px; right: 8px; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); }
.philosophy-card .card-corner.bl { bottom: 8px; left: 8px; border-bottom: 1px solid var(--accent); border-left: 1px solid var(--accent); }
.philosophy-card .card-corner.br { bottom: 8px; right: 8px; border-bottom: 1px solid var(--accent); border-right: 1px solid var(--accent); }

/* ============================================================
   展览召唤横幅
   ============================================================ */
.exhibition-banner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 64px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.exhibition-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(201, 160, 80, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.exhibition-banner .banner-overline {
  font-family: var(--font-classical);
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.exhibition-banner h3 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.exhibition-banner p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Ambient floating ornaments --- */
.ambient-ornament {
  position: absolute;
  pointer-events: none;
  user-select: none;
}

.ambient-ornament.circle {
  width: 200px;
  height: 200px;
  border: 1px solid rgba(201, 160, 80, 0.06);
  border-radius: 50%;
  animation: gentleFloat 8s ease-in-out infinite;
}

.ambient-ornament.diamond {
  width: 60px;
  height: 60px;
  border: 1px solid rgba(201, 160, 80, 0.08);
  transform: rotate(45deg);
  animation: gentleFloat 10s ease-in-out infinite reverse;
}

/* ============================================================
   响应式 - 新区块
   ============================================================ */

@media (max-width: 1024px) {
  .philosophy-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .philosophy-card {
    padding: 40px 20px;
  }
  .exhibition-banner {
    padding: 60px 32px;
  }
  .quote-section {
    padding: 100px var(--container-padding);
  }
}

@media (max-width: 768px) {
  .philosophy-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
  .quote-text {
    font-size: 24px;
  }
  .quote-text::before {
    font-size: 80px;
    top: -40px;
    left: -20px;
  }
  .exhibition-banner {
    padding: 48px 24px;
  }
  .quote-section {
    padding: 80px 24px;
  }
}

@media (max-width: 1024px) {
  :root {
    --section-gap: 100px;
  }

}

@media (max-width: 768px) {
  :root {
    --section-gap: 80px;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(20, 17, 14, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-medium) var(--ease-out-expo);
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a {
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
    z-index: 1;
  }

  .hero {
    min-height: 500px;
  }
}

@media (max-width: 480px) {
  :root {
    --section-gap: 60px;
  }

  .hero-scroll {
    display: none;
  }

  .section-header {
    margin-bottom: 40px;
  }
}