@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

/* ============================================================
   CSS 变量 / 设计令牌
   ============================================================ */
:root {
  --cream: #f5e6c8;
  --amber: #d4a574;
  --dark: #262117;
  --amber-dark: #b8824a;
  --amber-light: #e8c99a;
  --cream-dark: #e8d0a8;
  --dark-mid: #3d3020;
  --dark-light: #5a4a35;
  --text: #262117;
  --text-mid: #4a3a28;
  --text-light: #7a6248;
  --surface: #f0d9b0;
  --border: #d4a574;
  --border-light: #e8c99a;
  --radius: 4px;
  --nav-h: 60px;
  --font-main: 'Lexend', 'Source Sans 3', system-ui, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --grain-opacity: 0.04;
  --transition: 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--cream);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  padding-bottom: var(--nav-h);
  position: relative;
  overflow-x: hidden;
}

/* ============================================================
   Film Grain Overlay (SVG filter)
   ============================================================ */
.vhs-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23g)' opacity='1'/%3E%3C/svg%3E");
  animation: grain-shift 0.15s steps(1) infinite;
}

@keyframes grain-shift {
  0%  { transform: translate(0, 0); }
  20% { transform: translate(-2px, 1px); }
  40% { transform: translate(2px, -1px); }
  60% { transform: translate(-1px, 2px); }
  80% { transform: translate(1px, -2px); }
  100%{ transform: translate(0, 0); }
}

/* Light leak overlay */
.light-leak {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  background: radial-gradient(ellipse at 0% 0%, rgba(212,165,116,0.18) 0%, transparent 60%),
              radial-gradient(ellipse at 100% 100%, rgba(245,230,200,0.12) 0%, transparent 55%);
  animation: leak-pulse 8s ease-in-out infinite alternate;
}

@keyframes leak-pulse {
  0%   { opacity: 0.6; }
  100% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .vhs-grain { animation: none; }
  .light-leak { animation: none; }
}

/* ============================================================
   排版
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: 700;
  line-height: 1.3;
  color: var(--dark);
}

a {
  color: var(--amber-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--dark); text-decoration: underline; }

p { margin-bottom: 1.1em; }
img { max-width: 100%; height: auto; display: block; }

/* ============================================================
   底部固定导航条（桌面也用）
   ============================================================ */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--dark);
  border-top: 2px solid var(--amber);
  min-height: var(--nav-h);
}

.footer-bar {
  display: flex;
  align-items: center;
  gap: 0;
  height: var(--nav-h);
  padding: 0 8px;
  position: relative;
}

/* 品牌图标角落 */
.footer-brand {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--amber);
  border-radius: var(--radius);
  margin-right: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--dark);
  letter-spacing: -0.5px;
  line-height: 1.1;
  text-align: center;
}
.footer-brand:hover { background: var(--amber-light); text-decoration: none; color: var(--dark); }

/* 导航主体 */
.footer-nav-wrap {
  flex: 1;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.footer-nav-wrap::-webkit-scrollbar { display: none; }

.footer-nav {
  display: block;
}

/* 结构抽签：footer > nav > dl > dt/dd > a */
.footer-nav dl {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
  white-space: nowrap;
}

.footer-nav dt {
  position: relative;
}

.footer-nav dt > button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--amber-light);
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 10px 10px;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 3px;
  transition: color var(--transition);
  white-space: nowrap;
}
.footer-nav dt > button::after {
  content: '▲';
  font-size: 0.55rem;
  transition: transform var(--transition);
  display: inline-block;
}
.footer-nav dt.open > button::after { transform: rotate(180deg); }
.footer-nav dt > button:hover { color: #fff; }

/* 下拉面板 */
.footer-nav dt > .dropdown {
  display: none;
  position: absolute;
  bottom: calc(100% + 4px);
  left: 0;
  background: var(--dark-mid);
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  min-width: 180px;
  z-index: 100;
  padding: 4px 0;
}
.footer-nav dt.open > .dropdown { display: block; }

.footer-nav dd {
  margin: 0;
}
.footer-nav dd a {
  display: block;
  padding: 10px 16px;
  min-height: 44px;
  line-height: 1.3;
  color: var(--cream);
  font-size: 0.82rem;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  display: flex;
  align-items: center;
}
.footer-nav dd a:hover {
  background: var(--amber);
  color: var(--dark);
  text-decoration: none;
}

/* 联系入口 */
.footer-contact {
  flex-shrink: 0;
  margin-left: 8px;
}
.footer-contact a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 12px;
  background: var(--amber);
  color: var(--dark);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition);
  white-space: nowrap;
}
.footer-contact a:hover { background: var(--amber-light); text-decoration: none; }

/* 版权行（大品牌字 + 底部链接分列） */
.footer-copy-row {
  background: #1a160e;
  border-top: 1px solid var(--dark-mid);
  display: none; /* 移动端隐藏，桌面展示 */
}

@media (min-width: 768px) {
  .footer-copy-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 24px;
  }
}

.footer-brand-big {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.footer-copy-links {
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-light);
}
.footer-copy-links a { color: var(--text-light); }
.footer-copy-links a:hover { color: var(--amber); }
.footer-copy-text {
  font-size: 0.75rem;
  color: #5a4a35;
}

/* ============================================================
   Hero（首页）
   ============================================================ */
.site-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--dark);
}

.hero-media {
  position: absolute;
  inset: 0;
}
.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(0.5) contrast(0.9) saturate(0.7);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(38,33,23,0.55) 0%, rgba(38,33,23,0.75) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 48px 24px 56px;
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  background: var(--amber);
  color: var(--dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 2px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.hero-h1 {
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  color: var(--cream);
  margin-bottom: 16px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.hero-sub {
  color: var(--amber-light);
  font-size: 1rem;
  margin-bottom: 28px;
  line-height: 1.6;
}

.hero-cta {
  display: inline-block;
  background: var(--amber);
  color: var(--dark);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 32px;
  border-radius: var(--radius);
  text-decoration: none;
  min-height: 48px;
  line-height: 1.2;
  display: inline-flex;
  align-items: center;
  transition: background var(--transition), transform 0.2s;
}
.hero-cta:hover { background: var(--amber-light); transform: translateY(-1px); text-decoration: none; }

/* ============================================================
   页面文章容器（结构抽签：article 直接作顶层，正文放 section > div）
   ============================================================ */
.page-article {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.content-section {
  margin-bottom: 48px;
}

.prose-wrap {
  max-width: 800px;
}

.prose-narrow {
  max-width: 680px;
}

/* 正文 HTML 内元素样式 */
.prose-wrap h2 { font-size: 1.35rem; margin: 2em 0 0.7em; padding-bottom: 6px; border-bottom: 2px solid var(--amber-light); }
.prose-wrap h3 { font-size: 1.12rem; margin: 1.6em 0 0.5em; color: var(--dark-mid); }
.prose-wrap p { color: var(--text-mid); }
.prose-wrap ul, .prose-wrap ol { padding-left: 1.5em; margin-bottom: 1em; }
.prose-wrap li { margin-bottom: 0.4em; color: var(--text-mid); }
.prose-wrap blockquote {
  border-left: 4px solid var(--amber);
  padding: 12px 20px;
  background: var(--cream-dark);
  margin: 1.5em 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-mid);
  font-style: italic;
}
.prose-wrap table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 0.9rem; }
.prose-wrap th { background: var(--dark); color: var(--cream); padding: 10px 14px; text-align: left; }
.prose-wrap td { padding: 8px 14px; border-bottom: 1px solid var(--border-light); }
.prose-wrap tr:nth-child(even) td { background: var(--cream-dark); }
.prose-wrap a { color: var(--amber-dark); text-decoration: underline; }
.prose-wrap a:hover { color: var(--dark); }

/* ============================================================
   栏目标题
   ============================================================ */
.section-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber-dark);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-heading {
  font-size: 1.5rem;
  margin-bottom: 28px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--amber);
  display: inline-block;
}

/* ============================================================
   首页：精选频道卡片（结构抽签：section > article×n）
   ============================================================ */
.channels-section {
  margin-bottom: 56px;
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

/* 卡片：底部强调线 + 4px radius */
.feat-card, .ch-card {
  background: #efe0c0;
  border-radius: var(--radius);
  overflow: hidden;
  border-bottom: 4px solid var(--amber);
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
}
.feat-card:hover, .ch-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(38,33,23,0.18);
}

/* Polaroid frame effect */
.feat-card::before, .ch-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(212,165,116,0.3);
  border-radius: var(--radius);
  pointer-events: none;
  z-index: 1;
}

.card-img-wrap {
  overflow: hidden;
  height: 160px;
  position: relative;
}
.card-img-wrap .card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(0.3) saturate(0.85) contrast(0.95);
  transition: filter 0.3s, transform 0.3s;
}
.feat-card:hover .card-img, .ch-card:hover .card-img {
  filter: sepia(0.1) saturate(1) contrast(1);
  transform: scale(1.03);
}

.card-body {
  padding: 16px 16px 12px;
}
.card-title {
  font-size: 1rem;
  margin-bottom: 8px;
}
.card-title a { color: var(--dark); text-decoration: none; }
.card-title a:hover { color: var(--amber-dark); }
.card-desc { font-size: 0.85rem; color: var(--text-mid); margin-bottom: 12px; line-height: 1.5; }
.card-link { font-size: 0.8rem; font-weight: 600; color: var(--amber-dark); }
.card-link:hover { color: var(--dark); }

/* ============================================================
   首页：近期文章列表
   ============================================================ */
.recent-section { margin-bottom: 40px; }

.article-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.list-item {
  background: #efe0c0;
  border-left: 4px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 10px;
}
.list-item:hover { background: var(--cream-dark); border-color: var(--dark); }

.list-item-inner { padding: 16px 20px; }

.list-meta { margin-bottom: 4px; }
.art-date { font-size: 0.75rem; color: var(--text-light); }

.list-title { font-size: 1.05rem; margin-bottom: 6px; }
.list-title a { color: var(--dark); text-decoration: none; }
.list-title a:hover { color: var(--amber-dark); text-decoration: underline; }
.list-desc { font-size: 0.85rem; color: var(--text-mid); line-height: 1.5; }

/* ============================================================
   栏目页头部
   ============================================================ */
.ch-header {
  background: var(--dark);
  border-bottom: 3px solid var(--amber);
  padding: 0;
}
.ch-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 32px;
}
.ch-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.ch-h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  color: var(--cream);
  margin-bottom: 12px;
}
.ch-desc { color: var(--amber-light); font-size: 0.95rem; max-width: 600px; }

.ch-article { max-width: 1100px; margin: 0 auto; padding: 40px 20px 60px; }

.ch-children { margin-top: 48px; }

.ch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.type-tag {
  display: inline-block;
  background: var(--dark);
  color: var(--amber);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 8px;
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}
.breadcrumb a { color: var(--amber-dark); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.bc-sep { color: var(--amber-light); margin: 0 2px; }

.art-top {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 0;
}

/* ============================================================
   文章页
   ============================================================ */
.art-hero-wrap {
  position: relative;
  max-height: 360px;
  overflow: hidden;
}
.art-hero-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  filter: sepia(0.4) contrast(0.92) saturate(0.75);
}
.art-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(38,33,23,0.5) 100%);
}

.art-page { max-width: 1100px; margin: 0 auto; padding: 32px 20px 60px; }

.art-header { margin-bottom: 32px; border-bottom: 2px solid var(--border-light); padding-bottom: 24px; }

.art-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.8rem;
}
.art-pub-date, .art-mod-date { color: var(--text-light); }
.art-cat-tag {
  display: inline-block;
  background: var(--amber);
  color: var(--dark);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 2px;
  text-decoration: none;
}
.art-cat-tag:hover { background: var(--amber-dark); color: var(--cream); text-decoration: none; }

.art-h1 { font-size: clamp(1.4rem, 4vw, 2rem); margin-bottom: 12px; }
.art-lead { color: var(--text-mid); font-size: 1.05rem; line-height: 1.7; }

.art-body { margin-bottom: 48px; }

/* 相关阅读 */
.related-aside { margin-top: 48px; border-top: 2px solid var(--border-light); padding-top: 32px; }
.related-heading { font-size: 1.2rem; margin-bottom: 20px; }
.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.rel-item {
  background: #efe0c0;
  border-radius: var(--radius);
  border-bottom: 3px solid var(--amber);
  padding: 14px 16px;
  transition: transform 0.2s;
}
.rel-item:hover { transform: translateY(-2px); }
.rel-title { font-size: 0.92rem; margin-bottom: 6px; }
.rel-title a { color: var(--dark); text-decoration: none; }
.rel-title a:hover { color: var(--amber-dark); text-decoration: underline; }
.rel-desc { font-size: 0.8rem; color: var(--text-light); line-height: 1.5; }

/* ============================================================
   关于页
   ============================================================ */
.about-header {
  background: var(--dark);
  border-bottom: 3px solid var(--amber);
}
.about-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 20px 36px;
  text-align: center;
}
.about-logo { margin-bottom: 20px; display: flex; justify-content: center; }
.about-logo-img { max-height: 64px; }
.about-eyebrow {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--amber); margin-bottom: 10px; text-transform: uppercase;
}
.about-h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); color: var(--cream); margin-bottom: 12px; }
.about-sub { color: var(--amber-light); font-size: 0.95rem; max-width: 540px; margin: 0 auto; }

.about-article { max-width: 1100px; margin: 0 auto; padding: 40px 20px 60px; }
.about-content { margin-bottom: 48px; }

.about-links { margin-top: 48px; border-top: 2px solid var(--border-light); padding-top: 32px; }
.about-links-heading { font-size: 1.2rem; margin-bottom: 20px; }
.about-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.about-nav-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #efe0c0;
  border-radius: var(--radius);
  border-bottom: 3px solid var(--amber);
  padding: 14px 16px;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s;
}
.about-nav-item:hover { transform: translateY(-2px); background: var(--cream-dark); text-decoration: none; }
.anav-title { font-size: 0.88rem; font-weight: 600; color: var(--dark); }
.anav-desc { font-size: 0.78rem; color: var(--text-light); line-height: 1.4; }

/* ============================================================
   隐私页
   ============================================================ */
.privacy-header {
  background: var(--dark);
  border-bottom: 2px solid var(--amber);
}
.privacy-header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px 28px;
}
.privacy-eyebrow {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--amber); margin-bottom: 10px; text-transform: uppercase;
}
.privacy-h1 { font-size: clamp(1.3rem, 3vw, 1.8rem); color: var(--cream); margin-bottom: 10px; }
.privacy-date { color: var(--text-light); font-size: 0.8rem; margin: 0; }

.privacy-article { max-width: 800px; margin: 0 auto; padding: 40px 20px 60px; }
.privacy-nav { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border-light); font-size: 0.85rem; color: var(--text-mid); }

/* ============================================================
   默认页
   ============================================================ */
.default-header {
  background: var(--dark);
  border-bottom: 2px solid var(--amber);
}
.default-header-inner {
  max-width: 1100px; margin: 0 auto; padding: 40px 20px 28px;
}
.default-h1 { font-size: clamp(1.4rem, 4vw, 2rem); color: var(--cream); margin-bottom: 10px; }
.default-desc { color: var(--amber-light); font-size: 0.95rem; }
.default-article { max-width: 1100px; margin: 0 auto; padding: 40px 20px 60px; }

/* ============================================================
   Scroll Reveal 动效
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease calc(var(--i, 0) * 0.08s),
              transform 0.4s ease calc(var(--i, 0) * 0.08s);
}
.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .stagger-item {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 480px) {
  .hero-content { padding: 36px 16px 48px; }
  .hero-h1 { font-size: 1.5rem; }
  .page-article, .ch-article, .art-page, .about-article, .privacy-article { padding: 28px 16px 48px; }
  .feat-grid, .ch-grid { grid-template-columns: 1fr; }
  .related-list { grid-template-columns: 1fr; }
  .about-nav-grid { grid-template-columns: 1fr; }
}

@media (min-width: 768px) {
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .ch-grid { grid-template-columns: repeat(2, 1fr); }
  body { padding-bottom: calc(var(--nav-h) + 40px); }
}

@media (min-width: 1024px) {
  .feat-grid { grid-template-columns: repeat(3, 1fr); }
  .ch-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   桌面导航宽屏优化
   ============================================================ */
@media (min-width: 768px) {
  .footer-bar { padding: 0 20px; }
  .footer-nav dt > button { font-size: 0.85rem; padding: 10px 14px; }
  .footer-nav dd a { font-size: 0.88rem; }
  .footer-brand { width: 50px; height: 50px; font-size: 0.7rem; }
}