/* ========================================
   张小泽 Photo · 个人博客
   ======================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --color-bg: #f7f3ed;
  --color-bg-alt: #ebe4da;
  --color-surface: #ffffff;
  --color-text: #2a2520;
  --color-text-secondary: #6b5f54;
  --color-text-muted: #9a8c80;
  --color-accent: #c8935a;
  --color-accent-dark: #a67743;
  --color-dark: #2a2520;
  --color-dark-light: #3d352e;
  --color-border: #e2d9cc;
  --color-text-inverse: #f7f3ed;

  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --container-max: 1200px;
  --container-padding: 1.5rem;

  --transition-base: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(42, 37, 32, 0.06);
  --shadow-md: 0 8px 24px rgba(42, 37, 32, 0.1);
  --shadow-lg: 0 20px 50px rgba(42, 37, 32, 0.15);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(42, 37, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200, 147, 90, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-100%);
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0.5s ease;
}

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

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.9rem var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-text-inverse);
  transition: color var(--transition-base);
  flex-shrink: 0;
}

.nav-logo-accent {
  color: var(--color-accent);
  font-weight: 500;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text-inverse);
  opacity: 0.85;
  transition: all var(--transition-base);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  opacity: 1;
  color: var(--color-accent);
}

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

/* ---------- 英雄区 ---------- */
.hero {
  position: relative;
  padding: 8rem 0 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-inverse);
  overflow: hidden;
  background: linear-gradient(135deg, #2a2520 0%, #3d352e 50%, #2a2520 100%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(200, 147, 90, 0.15), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(200, 147, 90, 0.1), transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  margin-bottom: 1.2rem;
}

.title-accent {
  color: var(--color-accent);
  font-weight: 600;
}

.hero-subtitle {
  font-size: 1.4rem;
  font-weight: 300;
  color: rgba(247, 243, 237, 0.75);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.hero-tagline {
  font-size: 1.1rem;
  color: rgba(247, 243, 237, 0.55);
  letter-spacing: 0.15em;
}

/* 探索作品 */
.hero-scroll {
  position: relative;
  z-index: 1;
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: rgba(247, 243, 237, 0.6);
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  transition: color var(--transition-base);
}

.hero-scroll:hover {
  color: var(--color-accent);
}

.scroll-line {
  width: 1px;
  height: 50px;
  background: currentColor;
  animation: scrollPulse 2s ease-in-out infinite;
}

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

/* ---------- 通用板块 ---------- */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-weight: 300;
  letter-spacing: 0.08em;
}

/* ---------- 第一板块：VR 全景 ---------- */
.section-vr {
  background: var(--color-bg);
}

.vr-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.vr-card {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.vr-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.vr-card-image {
  position: relative;
  overflow: hidden;
}

.vr-card-image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.vr-card-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  background: rgba(42, 37, 32, 0.75);
  backdrop-filter: blur(8px);
  border-radius: 50px;
  color: var(--color-text-inverse);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.vr-card-badge svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
}

.vr-card-body {
  padding: 1.5rem;
}

.vr-card-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.vr-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.vr-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 500;
  transition: gap var(--transition-base);
}

.vr-card-cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.vr-card:hover .vr-card-cta {
  gap: 0.6rem;
}

.vr-card:hover .vr-card-cta svg {
  transform: translateX(3px);
}

/* ---------- 第二板块：平面视觉 — 左右交替 ---------- */
.section-visual {
  background: var(--color-bg-alt);
}

.visual-list {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.visual-row {
  display: flex;
  align-items: center;
  gap: 3.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.visual-row:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* 左图右文 */
.visual-row--left .visual-row-image {
  flex: 1.1;
  min-width: 0;
}

.visual-row--left .visual-row-text {
  flex: 0.9;
  padding: 2.5rem 2.5rem 2.5rem 0;
}

/* 右图左文 */
.visual-row--right {
  flex-direction: row-reverse;
}

.visual-row--right .visual-row-image {
  flex: 1.1;
  min-width: 0;
}

.visual-row--right .visual-row-text {
  flex: 0.9;
  padding: 2.5rem 0 2.5rem 2.5rem;
}

.visual-row-image {
  overflow: hidden;
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f0ebe3;
}

.visual-row-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  min-height: 320px;
}

.visual-row:hover .visual-row-image img {
  transform: scale(1.04);
}

.visual-row-text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.visual-row-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.meta-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(200, 147, 90, 0.12);
  color: var(--color-accent-dark);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 50px;
  letter-spacing: 0.03em;
}

.meta-tag--video {
  background: rgba(107, 95, 84, 0.12);
  color: var(--color-text-secondary);
}

.meta-sep {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  opacity: 0.6;
}

.meta-count,
.meta-film {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.visual-row-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.visual-row-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin: 0;
}

.visual-row-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: gap var(--transition-base);
}

.visual-row-cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.visual-row:hover .visual-row-cta {
  gap: 0.8rem;
}

.visual-row:hover .visual-row-cta svg {
  transform: translateX(4px);
}

/* ---------- 第三板块：更多内容 ---------- */
.section-more {
  background: var(--color-bg);
}

.more-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.more-item {
  display: flex;
  align-items: center;
  gap: 3rem;
  padding: 2.5rem 3rem;
  background: linear-gradient(135deg, #3d352e 0%, #2a2520 100%);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.more-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.more-item-logo {
  flex-shrink: 0;
  width: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.more-item-logo img {
  max-height: 5.5rem;
  max-width: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform var(--transition-base);
}

.more-item:hover .more-item-logo img {
  transform: scale(1.05);
}

.more-item-body {
  flex: 1;
  min-width: 0;
}

.more-item-label {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.more-item-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-text-inverse);
  margin-bottom: 0.75rem;
}

.more-item-desc {
  font-size: 0.95rem;
  color: rgba(247, 243, 237, 0.7);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.more-item-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: gap var(--transition-base);
}

.more-item-cta svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.more-item:hover .more-item-cta {
  gap: 0.8rem;
}

.more-item:hover .more-item-cta svg {
  transform: translateX(4px);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--color-dark);
  color: var(--color-text-inverse);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-title-accent {
  color: var(--color-accent);
}

.footer-tagline {
  font-size: 0.85rem;
  color: rgba(247, 243, 237, 0.5);
  line-height: 1.6;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.footer-text {
  font-size: 0.9rem;
  color: rgba(247, 243, 237, 0.6);
  line-height: 1.8;
}

.footer-link {
  display: block;
  font-size: 0.9rem;
  color: rgba(247, 243, 237, 0.6);
  transition: color var(--transition-base);
  line-height: 1.8;
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(247, 243, 237, 0.08);
  font-size: 0.8rem;
  color: rgba(247, 243, 237, 0.35);
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--color-dark);
  color: var(--color-text-inverse);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .vr-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .visual-row,
  .visual-row--right {
    flex-direction: column;
    gap: 0;
  }

  .visual-row--left .visual-row-text,
  .visual-row--right .visual-row-text {
    padding: 2rem;
  }

  .visual-row-image img {
    min-height: 240px;
  }

  .more-item {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
    padding: 2rem;
  }

  .more-item-logo {
    width: 100%;
  }

  .more-item-logo img {
    max-height: 4rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 520px) {
  .section {
    padding: 4rem 0;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 6rem 0 4rem;
  }

  .vr-grid {
    grid-template-columns: 1fr;
  }

  .visual-row-title {
    font-size: 1.3rem;
  }

  .more-item-title {
    font-size: 1.3rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}