/* =========================================================
   致敬巨匠：从达·芬奇到卡拉瓦乔——意大利文艺复兴名作展
   文艺复兴风格的暗色调官网
   ========================================================= */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-night: #0E0B08;
  --bg-night-2: #161109;
  --bg-paper: #F4ECD8;
  --text-warm: #E8DCC4;
  --text-soft: #B8A987;
  --text-dim: #7A6E57;
  --gold: #C8A567;
  --gold-deep: #8B6F2E;
  --rosso: #8B2C2C;
  --rosso-light: #B85450;
  --line: #3A2F22;
  --line-soft: #2A2118;
  --shadow-deep: 0 30px 80px rgba(0, 0, 0, 0.55);
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 40px rgba(200, 165, 103, 0.18);
  --serif-zh: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", "宋体", serif;
  --serif-en: "Cormorant Garamond", "EB Garamond", "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg-night);
  color: var(--text-warm);
  font-family: var(--serif-zh);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  /* 精致的暗色纹理 */
  background-image:
    radial-gradient(ellipse at top, rgba(139, 44, 44, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at bottom, rgba(200, 165, 103, 0.05) 0%, transparent 60%);
  background-attachment: fixed;
}

/* ========= 字体加载 ========= */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Noto+Serif+SC:wght@300;400;500;600;700;900&display=swap');

/* ========= 顶部导航 ========= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(14, 11, 8, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
  padding: 0.9rem 2rem;
}

.header-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0;
  text-decoration: none;
  color: var(--text-warm);
}

.brand .brand-zh {
  font-family: var(--serif-zh);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.brand .brand-en {
  font-family: var(--serif-en);
  font-size: 0.7rem;
  font-style: italic;
  color: var(--gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}

.nav {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}

.nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-family: var(--serif-zh);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  transition: color 0.3s ease;
  position: relative;
}

.nav a:hover {
  color: var(--gold);
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.nav a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-warm);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-night-2);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--line);
  }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
}

/* ========= 通用 ========= */
.section {
  padding: 6rem 2rem;
  max-width: 1320px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--serif-zh);
  font-size: 2.4rem;
  font-weight: 500;
  color: var(--text-warm);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.section-eyebrow {
  font-family: var(--serif-en);
  font-size: 0.85rem;
  font-style: italic;
  color: var(--gold);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text-soft);
  max-width: 720px;
  margin-bottom: 3rem;
  line-height: 1.85;
}

/* ========= HERO 区块 ========= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 8rem 2rem 4rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(139, 44, 44, 0.15) 0%, transparent 70%),
    linear-gradient(180deg, rgba(14, 11, 8, 0.3) 0%, var(--bg-night) 100%);
  z-index: -1;
}

.hero-inner {
  text-align: center;
  max-width: 1000px;
  z-index: 1;
}

.hero-eyebrow {
  font-family: var(--serif-en);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--gold);
  letter-spacing: 0.4em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--serif-zh);
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.06em;
  color: var(--text-warm);
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 30px rgba(200, 165, 103, 0.15);
}

.hero-title .gold {
  color: var(--gold);
  font-style: italic;
}

.hero-subtitle {
  font-family: var(--serif-en);
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-style: italic;
  color: var(--text-soft);
  margin-bottom: 2.5rem;
  letter-spacing: 0.08em;
}

.hero-meta {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  color: var(--text-soft);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.hero-meta-item .label {
  font-family: var(--serif-en);
  font-size: 0.7rem;
  font-style: italic;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.25em;
}

.hero-meta-item .value {
  font-family: var(--serif-zh);
  color: var(--text-warm);
}

.hero-cta {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  font-family: var(--serif-zh);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  border-radius: 100px;
  transition: all 0.35s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--rosso) 0%, #6B1F1F 100%);
  color: var(--text-warm);
  border-color: var(--rosso-light);
  box-shadow: 0 8px 24px rgba(139, 44, 44, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(139, 44, 44, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold-deep);
}

.btn-ghost:hover {
  background: rgba(200, 165, 103, 0.1);
  border-color: var(--gold);
}

/* 装饰分割线 */
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 3rem auto;
  max-width: 400px;
  color: var(--gold-deep);
}

.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-deep), transparent);
}

.divider .ornament {
  font-size: 1.2rem;
  color: var(--gold);
}

/* ========= 三个章节特长卡片 ========= */
.chapters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.chapter-card {
  position: relative;
  background: linear-gradient(155deg, rgba(22, 17, 9, 0.9) 0%, rgba(14, 11, 8, 0.9) 100%);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3rem 2.5rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.4s ease;
  overflow: hidden;
}

.chapter-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, var(--gold) 0%, var(--rosso) 100%);
  transition: height 0.5s ease;
}

.chapter-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-deep);
  box-shadow: var(--shadow-deep), var(--shadow-glow);
}

.chapter-card:hover::before {
  height: 100%;
}

.chapter-number {
  font-family: var(--serif-en);
  font-size: 4rem;
  font-style: italic;
  font-weight: 300;
  color: var(--gold-deep);
  line-height: 1;
  margin-bottom: 1.5rem;
  opacity: 0.6;
}

.chapter-title {
  font-family: var(--serif-zh);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-warm);
  margin-bottom: 0.3rem;
  letter-spacing: 0.06em;
}

.chapter-subtitle {
  font-family: var(--serif-en);
  font-size: 1rem;
  font-style: italic;
  color: var(--gold);
  margin-bottom: 1.5rem;
  letter-spacing: 0.1em;
}

.chapter-desc {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.chapter-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--gold);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  transition: gap 0.3s ease;
}

.chapter-card:hover .chapter-link {
  gap: 1rem;
}

/* ========= 作品网格 ========= */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.artwork-card {
  background: var(--bg-night-2);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.4s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.artwork-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-deep);
  box-shadow: var(--shadow-card), 0 0 30px rgba(200, 165, 103, 0.1);
}

.artwork-image {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #000;
}

.artwork-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.artwork-card:hover .artwork-image img {
  transform: scale(1.05);
}

.artwork-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(14, 11, 8, 0.6) 100%);
  pointer-events: none;
}

.artwork-num {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold);
  background: rgba(14, 11, 8, 0.7);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  letter-spacing: 0.1em;
}

.artwork-info {
  padding: 1.5rem 1.5rem 1.8rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.artwork-title {
  font-family: var(--serif-zh);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-warm);
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.artwork-artist {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--gold);
  margin-bottom: 0.8rem;
  letter-spacing: 0.05em;
}

.artwork-meta {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--serif-en);
  letter-spacing: 0.05em;
}

/* ========= 作品详情页 ========= */
.artwork-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

.artwork-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(139, 44, 44, 0.12) 0%, transparent 60%);
  z-index: -1;
}

.artwork-hero-inner {
  max-width: 1320px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 880px) {
  .artwork-hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.artwork-hero-image {
  aspect-ratio: 4 / 5;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-deep);
  border: 1px solid var(--line);
}

.artwork-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.artwork-hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.artwork-hero-eyebrow {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.artwork-hero-title {
  font-family: var(--serif-zh);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  color: var(--text-warm);
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.artwork-hero-title-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--gold);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.artwork-meta-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.8rem 1.5rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 1rem 0;
}

.artwork-meta-list dt {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  align-self: center;
}

.artwork-meta-list dd {
  font-size: 0.95rem;
  color: var(--text-warm);
}

.artwork-content {
  max-width: 820px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.artwork-content h2 {
  font-family: var(--serif-zh);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--gold);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.8rem;
}

.artwork-content p {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--text-warm);
  margin-bottom: 1.2rem;
  text-align: justify;
  text-indent: 2em;
}

.artwork-content p:first-of-type {
  text-indent: 0;
}

.artwork-content p:first-of-type::first-letter {
  font-family: var(--serif-en);
  font-size: 3.2rem;
  font-style: italic;
  font-weight: 600;
  color: var(--gold);
  float: left;
  line-height: 1;
  margin: 0.2rem 0.5rem 0 0;
}

/* ========= 章节页 ========= */
.chapter-header {
  padding: 10rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(139, 44, 44, 0.08) 0%, transparent 100%);
}

.chapter-eyebrow {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--gold);
  letter-spacing: 0.4em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.chapter-h1 {
  font-family: var(--serif-zh);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 500;
  color: var(--text-warm);
  margin-bottom: 0.5rem;
  letter-spacing: 0.06em;
}

.chapter-h1-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
}

.chapter-intro {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--text-soft);
  line-height: 1.9;
}

/* ========= Footer ========= */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 6rem;
  padding: 4rem 2rem 2rem;
  background: var(--bg-night-2);
}

.footer-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
}

@media (max-width: 760px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.footer-col p, .footer-col a {
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.8;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--gold);
}

.footer-list {
  list-style: none;
}

.footer-list li {
  margin-bottom: 0.6rem;
}

.footer-bottom {
  max-width: 1320px;
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ========= 动画 ========= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.fade-in[data-delay="1"] { animation-delay: 0.1s; }
.fade-in[data-delay="2"] { animation-delay: 0.2s; }
.fade-in[data-delay="3"] { animation-delay: 0.3s; }
.fade-in[data-delay="4"] { animation-delay: 0.4s; }
.fade-in[data-delay="5"] { animation-delay: 0.5s; }

.intersect {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.intersect.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========= 滚动条 ========= */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-night);
}

::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gold-deep);
}

/* ========= 过滤工具栏 ========= */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-soft);
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  font-family: var(--serif-zh);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.05em;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--gold);
  color: var(--bg-night);
  border-color: var(--gold);
}

/* ========= 选中查看全部 ========= */
.all-artworks {
  padding: 4rem 2rem;
  max-width: 1320px;
  margin: 0 auto;
}