/* 张爱玲专题 — 海上花开 */

:root {
  --zhang-ink: #0a0809;
  --zhang-wine: #6b1e3a;
  --zhang-gold: #d4af37;
  --zhang-gold-dim: rgba(212, 175, 55, 0.45);
  --zhang-paper: rgba(255, 248, 240, 0.92);
  --zhang-glass: rgba(20, 12, 18, 0.72);
  --zhang-border: rgba(212, 175, 55, 0.22);
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-display: 'Ma Shan Zheng', 'Noto Serif SC', serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  color: var(--zhang-paper);
  background: var(--zhang-ink);
  overflow-x: hidden;
  line-height: 1.75;
}

#zhang-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.zhang-grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* —— 导航 —— */
.zhang-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: linear-gradient(180deg, rgba(10, 8, 9, 0.85) 0%, transparent 100%);
  backdrop-filter: blur(8px);
}

.zhang-nav__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--zhang-gold);
  text-decoration: none;
  letter-spacing: 0.15em;
}

.zhang-nav__links {
  display: flex;
  gap: 1.25rem;
}

.zhang-nav__links a {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: rgba(255, 248, 240, 0.75);
  text-decoration: none;
  transition: color 0.25s;
}

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

.zhang-nav__back {
  font-size: 0.75rem;
  color: var(--zhang-gold-dim);
  text-decoration: none;
  border: 1px solid var(--zhang-border);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  transition: background 0.25s, color 0.25s;
}

.zhang-nav__back:hover {
  background: rgba(212, 175, 55, 0.12);
  color: var(--zhang-gold);
}

/* —— 主内容 —— */
.zhang-main {
  position: relative;
  z-index: 2;
}

.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.25rem 4rem;
}

.zhang-panel {
  max-width: 42rem;
  width: 100%;
  padding: 2.5rem 2rem;
  background: var(--zhang-glass);
  border: 1px solid var(--zhang-border);
  border-radius: 4px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  transform: translateY(0);
  opacity: 1;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.8s ease;
}

.zhang-panel--wide {
  max-width: 56rem;
}

.zhang-panel--finale {
  text-align: center;
}

.zhang-section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 400;
  color: var(--zhang-gold);
  margin: 0 0 1.25rem;
  letter-spacing: 0.2em;
  text-align: center;
}

.zhang-lead {
  font-size: 1rem;
  color: rgba(255, 248, 240, 0.88);
  margin: 0 0 2rem;
}

.zhang-lead--center {
  text-align: center;
}

.zhang-lead strong {
  color: var(--zhang-gold);
  font-weight: 600;
}

/* —— Hero —— */
.zhang-hero {
  flex-direction: column;
  text-align: center;
}

.zhang-hero__eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--zhang-gold-dim);
  margin: 0 0 1.5rem;
}

.zhang-hero__title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 18vw, 9rem);
  font-weight: 400;
  line-height: 1.05;
  margin: 0 0 1.5rem;
  text-shadow: 0 0 60px rgba(212, 175, 55, 0.35);
}

.zhang-hero__line {
  display: block;
}

.zhang-hero__line--accent {
  background: linear-gradient(135deg, #f5e6c8 0%, var(--zhang-gold) 40%, var(--zhang-wine) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.zhang-hero__sub {
  max-width: 22rem;
  margin: 0 auto 3rem;
  font-size: 1.05rem;
  color: rgba(255, 248, 240, 0.78);
  letter-spacing: 0.08em;
}

.zhang-hero__scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--zhang-gold-dim);
  animation: zhang-float 2.5s ease-in-out infinite;
}

.zhang-chevron {
  display: block;
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--zhang-gold);
  border-bottom: 1px solid var(--zhang-gold);
  transform: rotate(45deg);
}

@keyframes zhang-float {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* —— 时间线 —— */
.zhang-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid var(--zhang-border);
  margin-left: 0.5rem;
  padding-left: 1.5rem;
}

.zhang-time {
  position: relative;
  padding-bottom: 1.75rem;
}

.zhang-time::before {
  content: '';
  position: absolute;
  left: -1.65rem;
  top: 0.35rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--zhang-ink);
  border: 2px solid var(--zhang-gold-dim);
  box-shadow: 0 0 12px var(--zhang-gold-dim);
}

.zhang-time--peak::before {
  background: var(--zhang-gold);
  border-color: var(--zhang-gold);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.6);
}

.zhang-time time {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--zhang-gold);
}

.zhang-time h3 {
  margin: 0.25rem 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.zhang-time p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(255, 248, 240, 0.75);
}

/* —— 作品卡片 —— */
.zhang-works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: 1.25rem;
}

.zhang-work-card {
  padding: 1.35rem 1.15rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(212, 175, 55, 0.15);
  border-radius: 2px;
  transition: border-color 0.35s, box-shadow 0.35s, transform 0.35s;
  transform-style: preserve-3d;
  will-change: transform;
}

.zhang-work-card:hover {
  border-color: var(--zhang-gold-dim);
  box-shadow: 0 12px 40px rgba(107, 30, 58, 0.4);
}

.zhang-work-card__year {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--zhang-wine);
  background: rgba(107, 30, 58, 0.35);
  padding: 0.15rem 0.5rem;
  margin-bottom: 0.65rem;
}

.zhang-work-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--zhang-gold);
  font-weight: 600;
}

.zhang-work-card p {
  margin: 0;
  font-size: 0.82rem;
  color: rgba(255, 248, 240, 0.72);
  line-height: 1.6;
}

/* —— 名句 —— */
.zhang-quote-carousel {
  position: relative;
  min-height: 10rem;
}

.zhang-quote {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 1rem 0.5rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  pointer-events: none;
}

.zhang-quote.is-active {
  position: relative;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.zhang-quote p {
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  font-weight: 300;
  line-height: 1.9;
  margin: 0 0 1rem;
  text-align: center;
  color: rgba(255, 248, 240, 0.95);
}

.zhang-quote cite {
  display: block;
  text-align: center;
  font-size: 0.8rem;
  font-style: normal;
  color: var(--zhang-gold-dim);
  letter-spacing: 0.1em;
}

.zhang-quote-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.zhang-quote-dots button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(212, 175, 55, 0.25);
  cursor: pointer;
  padding: 0;
  transition: background 0.3s, transform 0.3s;
}

.zhang-quote-dots button.is-active {
  background: var(--zhang-gold);
  transform: scale(1.2);
}

/* —— 结尾 —— */
.zhang-footer-note {
  font-size: 0.75rem;
  color: rgba(255, 248, 240, 0.45);
  margin: 1.5rem 0 2rem;
}

.zhang-btn {
  display: inline-block;
  padding: 0.65rem 1.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--zhang-ink);
  background: linear-gradient(135deg, #f5e6c8, var(--zhang-gold));
  text-decoration: none;
  border-radius: 2px;
  transition: transform 0.25s, box-shadow 0.25s;
}

.zhang-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(212, 175, 55, 0.35);
}

/* —— 入场动画 —— */
.section .zhang-panel {
  opacity: 0;
  transform: translateY(48px);
}

.section.is-visible .zhang-panel {
  opacity: 1;
  transform: translateY(0);
}

.zhang-hero .zhang-hero__title,
.zhang-hero .zhang-hero__eyebrow,
.zhang-hero .zhang-hero__sub,
.zhang-hero .zhang-hero__scroll {
  opacity: 0;
  animation: zhang-fade-up 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.zhang-hero .zhang-hero__eyebrow { animation-delay: 0.2s; }
.zhang-hero .zhang-hero__title { animation-delay: 0.45s; }
.zhang-hero .zhang-hero__sub { animation-delay: 0.7s; }
.zhang-hero .zhang-hero__scroll { animation-delay: 1s; }

@keyframes zhang-fade-up {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .zhang-nav__links {
    display: none;
  }

  .zhang-panel {
    padding: 1.75rem 1.25rem;
  }

  .zhang-works-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .zhang-hero__scroll { animation: none; }
  .section .zhang-panel { opacity: 1; transform: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}