/* ================================================
   中国古诗词 · poet.css
   风格：水墨宣纸 · 诗词阅读专用
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;600;700&family=Ma+Shan+Zheng&display=swap');

/* ===== CSS 变量（与 style.css 保持一致） ===== */
:root {
  --paper:      #f7f1e6;
  --paper-dark: #ede3ce;
  --paper-mid:  #f0e8d5;
  --ink:        #1c1409;
  --ink-mid:    #3a2d1a;
  --ink-light:  #6b5a42;
  --gold:       #b5820a;
  --gold-light: #d4a843;
  --gold-pale:  rgba(181,130,10,0.12);
  --red:        #8b1c1c;
  --shadow-sm:  rgba(28,20,9,0.08);
  --shadow-md:  rgba(28,20,9,0.15);
}

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

html {
  scroll-behavior: smooth;
}

/* ===== 页面基础（与 style.css 一致） ===== */
body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: 'Noto Serif SC', 'Songti SC', '宋体', serif;
  font-weight: 400;
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* 宣纸格纹背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      rgba(181,130,10,0.06) 47px,
      rgba(181,130,10,0.06) 48px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      rgba(181,130,10,0.04) 47px,
      rgba(181,130,10,0.04) 48px
    );
  pointer-events: none;
  z-index: 0;
}

/* 顶部朱红横条 */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--red) 0%, #c0392b 40%, var(--gold) 60%, var(--red) 100%);
  z-index: 999;
}

/* ===== 返回导航 ===== */
.nav-back {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 28px 32px 0;
}

.nav-back a {
  text-decoration: none;
  color: var(--ink-light);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.nav-back a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold-light);
}

/* ===== 诗人 & 页面标题 ===== */
.page-header {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 52px 32px 40px;
  max-width: 700px;
  margin: 0 auto;
}

.page-header .poet-name {
  font-family: 'Ma Shan Zheng', cursive;
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.5em;
  text-shadow: 2px 3px 0 rgba(28,20,9,0.08);
  animation: fadeDown 0.8s ease both;
}

.page-header .poet-meta {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--gold);
  letter-spacing: 0.5em;
  font-weight: 300;
  animation: fadeDown 0.8s 0.1s ease both;
}

/* 标题分隔装饰 */
.page-header .divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 24px;
  animation: fadeDown 0.8s 0.15s ease both;
}

.page-header .divider::before,
.page-header .divider::after {
  content: '';
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
}

.page-header .divider::after {
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-header .divider span {
  color: var(--gold);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== 诗词主区域 ===== */
.poems-container {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 32px 80px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* ===== 单首诗词卡片 ===== */
.poem-card {
  background: linear-gradient(160deg, #fdfaf3, var(--paper-mid));
  border: 1px solid rgba(181,130,10,0.2);
  box-shadow: 0 4px 24px var(--shadow-sm), inset 0 0 60px rgba(255,252,240,0.6);
  padding: 36px 44px 32px;
  position: relative;
  overflow: hidden;
  animation: fadeUp 0.7s ease both;
}

/* 卡片左上角角线装饰 */
.poem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 32px; height: 32px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  opacity: 0.5;
}

.poem-card::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 32px; height: 32px;
  border-bottom: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  opacity: 0.5;
}

/* 诗名标题 */
.poem-card h1,
.poem-card h2 {
  font-family: 'Ma Shan Zheng', cursive;
  font-weight: 400;
  color: var(--red);
  letter-spacing: 0.35em;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 18px;
  font-size: 1.55rem;
}

.poem-card h1::after,
.poem-card h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* 诗句 */
.poem-card p {
  text-align: center;
  font-size: 1.12rem;
  line-height: 2.6;
  letter-spacing: 0.3em;
  color: var(--ink-mid);
  margin-bottom: 0;
}

/* 诗句悬停高亮 */
.poem-card p:hover {
  color: var(--ink);
  background: rgba(181,130,10,0.04);
  border-radius: 2px;
  transition: all 0.25s;
}

/* ===== 页脚返回按钮 ===== */
.footer-nav {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 32px 60px;
}

.footer-nav a {
  display: inline-block;
  text-decoration: none;
  color: var(--ink-light);
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  padding: 12px 36px;
  border: 1px solid rgba(181,130,10,0.28);
  background: rgba(255,252,240,0.5);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.footer-nav a::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--red), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.footer-nav a:hover {
  color: var(--ink);
  border-color: var(--gold);
  background: rgba(181,130,10,0.07);
  box-shadow: 0 2px 12px var(--shadow-sm);
  transform: translateY(-2px);
}

.footer-nav a:hover::before {
  transform: scaleX(1);
}

/* ===== 动画 ===== */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 错开每张卡片入场 */
.poem-card:nth-child(1) { animation-delay: 0.2s; }
.poem-card:nth-child(2) { animation-delay: 0.35s; }
.poem-card:nth-child(3) { animation-delay: 0.5s; }
.poem-card:nth-child(4) { animation-delay: 0.65s; }
.poem-card:nth-child(5) { animation-delay: 0.8s; }

/* ===== 响应式 ===== */
@media (max-width: 560px) {
  .poems-container {
    padding: 0 16px 60px;
    gap: 28px;
  }

  .poem-card {
    padding: 28px 24px 24px;
  }

  .poem-card h1,
  .poem-card h2 {
    font-size: 1.3rem;
  }

  .poem-card p {
    font-size: 1rem;
    line-height: 2.4;
  }

  .page-header {
    padding: 44px 20px 32px;
  }
}