/* ============================================
   诗境 · Poetry Site — 古风典雅样式
   ============================================ */

/* ---------- 变量 ---------- */
:root {
  --paper: #f5eedb;         /* 宣纸米黄 */
  --paper-dark: #ece1c4;    /* 深宣纸 */
  --ink: #2a2418;           /* 深墨 */
  --ink-light: #524839;     /* 淡墨 */
  --vermillion: #a83932;    /* 丹朱 */
  --vermillion-light: #c94a3f;
  --ochre: #c9a86e;         /* 浅赭 */
  --ochre-dark: #8a6f3a;
  --jade: #6b7f5c;          /* 竹青 */
  --shadow: 0 4px 24px rgba(50, 30, 10, 0.14);
  --shadow-lg: 0 12px 48px rgba(50, 30, 10, 0.22);
  --font-song: "Noto Serif SC", "STSong", "SimSun", "Songti SC", serif;
  --font-kai: "Ma Shan Zheng", "STKaiti", "KaiTi", "Kaiti SC", cursive;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-song);
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(201, 168, 110, 0.10), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(168, 57, 50, 0.06), transparent 50%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.6  0 0 0 0 0.45  0 0 0 0 0.25  0 0 0 0.06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  min-height: 100vh;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

a { color: var(--vermillion); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--vermillion-light); }

/* ---------- 顶栏：返回主站 (VC 风) ---------- */
.jimhang-bar {
  background: #0f1419;
  color: #e5d9b8;
  font-family: "Inter", "Helvetica Neue", "PingFang SC", sans-serif;
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 8px 32px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid rgba(201, 168, 110, 0.15);
}
.jimhang-bar a {
  color: #c9a86e;
  text-decoration: none;
  transition: color 0.2s;
}
.jimhang-bar a:hover { color: #f5eedb; }
.jimhang-bar .back-home {
  display: inline-flex; align-items: center; gap: 8px;
}
.jimhang-bar .back-home::before {
  content: "←"; font-size: 14px; margin-right: 4px;
}
.jimhang-bar .brand-jim {
  color: #e5d9b8;
  font-weight: 600;
  letter-spacing: 0.15em;
}
.jimhang-bar .chapter {
  color: #8a8065;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.jimhang-bar .github-link {
  display: inline-flex; align-items: center; gap: 6px;
}
.jimhang-bar .github-link svg { width: 14px; height: 14px; fill: currentColor; }
@media (max-width: 640px) {
  .jimhang-bar { padding: 8px 16px; font-size: 11px; }
  .jimhang-bar .chapter { display: none; }
}

/* ---------- 顶部导航 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(245, 238, 219, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(138, 111, 58, 0.22);
  padding: 14px 32px;
  display: flex; align-items: center; justify-content: space-between;
}
.topbar .brand {
  font-family: var(--font-kai);
  font-size: 22px;
  color: var(--ink);
  letter-spacing: 0.3em;
}
.topbar .brand::before {
  content: "◆"; color: var(--vermillion); margin-right: 10px; font-size: 12px;
}
.topbar nav a { margin-left: 24px; font-size: 15px; color: var(--ink-light); }
.topbar nav a:hover { color: var(--vermillion); }

/* ============================================
   首页：Hero + 3 诗卡
   ============================================ */

.hero {
  position: relative;
  min-height: 78vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 80px 20px 60px;
  overflow: hidden;
}
.hero .backdrop {
  position: absolute; inset: 0;
  background-image: url('../assets/images/hero.jpeg');
  background-size: cover; background-position: center;
  opacity: 0.28;
  filter: sepia(0.15) saturate(1.1);
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero .seal {
  display: inline-block;
  padding: 6px 14px;
  border: 1.5px solid var(--vermillion);
  color: var(--vermillion);
  font-family: var(--font-kai);
  letter-spacing: 0.5em;
  margin-bottom: 28px;
  font-size: 14px;
}
.hero h1 {
  font-family: var(--font-kai);
  font-size: clamp(64px, 12vw, 140px);
  color: var(--ink);
  letter-spacing: 0.35em;
  line-height: 1;
  margin-bottom: 20px;
  text-shadow: 0 2px 0 rgba(255,255,255,0.5);
}
.hero .sub {
  font-family: var(--font-song);
  font-size: clamp(18px, 2.4vw, 22px);
  color: var(--ink-light);
  letter-spacing: 0.5em;
  margin-bottom: 12px;
}
.hero .sub span { color: var(--vermillion); margin: 0 8px; }
.hero .tagline {
  margin-top: 32px;
  max-width: 620px;
  color: var(--ink-light);
  font-size: 15px;
  letter-spacing: 0.06em;
  padding: 0 20px;
}

/* 诗卡区块 */
.poems-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 32px 100px;
}
.section-title {
  text-align: center;
  font-family: var(--font-kai);
  font-size: 34px;
  color: var(--ink);
  letter-spacing: 0.4em;
  margin-bottom: 8px;
}
.section-title::after {
  content: ""; display: block;
  width: 60px; height: 2px;
  background: var(--vermillion);
  margin: 18px auto 0;
}
.section-desc {
  text-align: center;
  color: var(--ink-light);
  margin-bottom: 56px;
  letter-spacing: 0.08em;
}

.poem-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}
.poem-card {
  position: relative;
  background: var(--paper);
  border: 1px solid rgba(138, 111, 58, 0.35);
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column;
}
.poem-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.poem-card .card-image {
  aspect-ratio: 4 / 3;
  background-size: cover;
  background-position: center;
  position: relative;
}
.poem-card .card-image::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 55%, rgba(42, 36, 24, 0.55));
}
.poem-card .card-body {
  padding: 24px 26px 28px;
  flex: 1; display: flex; flex-direction: column;
}
.poem-card .card-title {
  font-family: var(--font-kai);
  font-size: 32px;
  color: var(--ink);
  letter-spacing: 0.24em;
  margin-bottom: 8px;
}
.poem-card .card-author {
  color: var(--ink-light);
  font-size: 14px;
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}
.poem-card .card-author .dynasty {
  color: var(--vermillion);
  margin-right: 6px;
}
.poem-card .card-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 20px;
}
.poem-card .card-tags span {
  font-size: 12px;
  color: var(--ochre-dark);
  border: 1px solid rgba(138, 111, 58, 0.4);
  padding: 3px 10px;
  border-radius: 12px;
  letter-spacing: 0.08em;
}
.poem-card .card-preview {
  font-family: var(--font-song);
  color: var(--ink-light);
  font-size: 15px;
  line-height: 2;
  margin-bottom: 22px;
  flex: 1;
}
.poem-card .card-cta {
  align-self: flex-start;
  color: var(--vermillion);
  font-weight: 500;
  letter-spacing: 0.15em;
  border-bottom: 1px solid var(--vermillion);
  padding-bottom: 3px;
  font-size: 14px;
}
.poem-card a { color: inherit; display: contents; }

/* 页脚 */
.site-footer {
  text-align: center;
  padding: 48px 20px 32px;
  color: var(--ink-light);
  font-size: 13px;
  letter-spacing: 0.15em;
  border-top: 1px solid rgba(138, 111, 58, 0.22);
  margin-top: 40px;
}
.site-footer .footer-tagline {
  margin-bottom: 20px;
  color: var(--ink-light);
}
.site-footer .footer-links {
  display: flex; gap: 32px; justify-content: center; align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.site-footer .footer-links a {
  color: var(--ink-light);
  display: inline-flex; align-items: center; gap: 6px;
  transition: color 0.2s;
}
.site-footer .footer-links a:hover { color: var(--vermillion); }
.site-footer .footer-links svg { width: 14px; height: 14px; fill: currentColor; }
.site-footer .footer-meta {
  color: var(--ochre-dark);
  font-size: 11px;
  letter-spacing: 0.18em;
  opacity: 0.75;
}

/* ============================================
   诗页
   ============================================ */

.poem-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 32px 100px;
}
.breadcrumb {
  color: var(--ink-light);
  font-size: 14px;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}
.breadcrumb a { color: var(--vermillion); }

/* 诗文原文区（书法风） */
.poem-hero {
  position: relative;
  margin-bottom: 60px;
  padding: 48px 40px 56px;
  background: linear-gradient(135deg, var(--paper) 0%, var(--paper-dark) 100%);
  border: 1px solid rgba(138, 111, 58, 0.35);
  border-radius: 4px;
  overflow: hidden;
}
.poem-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: var(--hero-bg);
  background-size: cover; background-position: center;
  opacity: 0.16; z-index: 0;
}
.poem-hero > * { position: relative; z-index: 1; }

.poem-meta {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 20px;
  color: var(--ink-light);
  font-size: 14px;
  letter-spacing: 0.14em;
}
.poem-meta .dynasty {
  color: var(--vermillion);
  border: 1px solid var(--vermillion);
  padding: 2px 10px;
  font-family: var(--font-kai);
}

.poem-title {
  font-family: var(--font-kai);
  font-size: clamp(48px, 8vw, 76px);
  color: var(--ink);
  letter-spacing: 0.3em;
  margin-bottom: 40px;
}

.poem-body {
  font-family: var(--font-kai);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 2.2;
  color: var(--ink);
  letter-spacing: 0.28em;
  text-align: center;
}
.poem-body p { margin-bottom: 4px; }

.seal-stamp {
  position: absolute;
  bottom: 24px; right: 28px;
  width: 60px; height: 60px;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid var(--vermillion);
  color: var(--vermillion);
  font-family: var(--font-kai);
  font-size: 12px;
  letter-spacing: 0.05em;
  transform: rotate(-4deg);
  z-index: 2;
  background: rgba(245, 238, 219, 0.5);
}

/* 章节小标题 */
.block-heading {
  font-family: var(--font-kai);
  font-size: 26px;
  color: var(--ink);
  letter-spacing: 0.28em;
  margin-bottom: 20px;
  padding-left: 14px;
  border-left: 4px solid var(--vermillion);
}

/* 视频短片区 */
.video-block { margin-bottom: 60px; }
.video-wrap {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(138, 111, 58, 0.35);
  background: var(--ink);
}
.video-wrap video {
  display: block;
  width: 100%;
  height: auto;
  max-height: 540px;
  object-fit: cover;
}
.video-hint {
  margin-top: 14px;
  color: var(--ink-light);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-align: center;
}

/* 解析区 */
.analysis-block { margin-bottom: 60px; }
.analysis-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.analysis-card {
  background: rgba(245, 238, 219, 0.6);
  border: 1px solid rgba(138, 111, 58, 0.25);
  border-radius: 4px;
  padding: 26px 30px;
  box-shadow: var(--shadow);
}
.analysis-card h4 {
  font-family: var(--font-kai);
  font-size: 20px;
  color: var(--vermillion);
  letter-spacing: 0.22em;
  margin-bottom: 14px;
}
.analysis-card p {
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink);
}
.translation-list {
  list-style: none;
  padding: 0;
  counter-reset: line;
}
.translation-list li {
  padding: 10px 0 10px 40px;
  border-bottom: 1px dashed rgba(138, 111, 58, 0.3);
  counter-increment: line;
  position: relative;
  font-size: 16px;
  line-height: 1.85;
}
.translation-list li::before {
  content: counter(line);
  position: absolute;
  left: 0; top: 12px;
  width: 26px; height: 26px;
  border: 1px solid var(--vermillion);
  color: var(--vermillion);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  font-family: var(--font-kai);
}
.translation-list li:last-child { border-bottom: none; }
.translation-list li .original {
  font-family: var(--font-kai);
  color: var(--ink-light);
  font-size: 15px;
  letter-spacing: 0.14em;
  margin-right: 12px;
}

/* 测验区 */
.quiz-block { margin-bottom: 40px; }
.quiz-intro {
  color: var(--ink-light);
  font-size: 15px;
  margin-bottom: 32px;
  padding: 14px 20px;
  background: rgba(201, 168, 110, 0.1);
  border-left: 3px solid var(--ochre);
  border-radius: 2px;
}
.quiz-question {
  background: rgba(245, 238, 219, 0.7);
  border: 1px solid rgba(138, 111, 58, 0.28);
  border-radius: 4px;
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.quiz-question .q-header {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 18px;
}
.quiz-question .q-num {
  font-family: var(--font-kai);
  color: var(--vermillion);
  font-size: 20px;
  letter-spacing: 0.1em;
  min-width: 40px;
}
.quiz-question .q-text {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  flex: 1;
}
.quiz-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.quiz-option {
  padding: 12px 18px;
  border: 1px solid rgba(138, 111, 58, 0.4);
  background: var(--paper);
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  font-size: 15px;
  color: var(--ink);
  display: flex; align-items: flex-start; gap: 12px;
  text-align: left;
  font-family: inherit;
  line-height: 1.6;
}
.quiz-option:hover:not(:disabled) {
  border-color: var(--vermillion);
  background: rgba(168, 57, 50, 0.05);
}
.quiz-option:disabled { cursor: default; }
.quiz-option .letter {
  min-width: 24px; height: 24px;
  border: 1px solid var(--ochre-dark);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-kai);
  font-size: 13px;
  color: var(--ochre-dark);
  flex-shrink: 0;
}
.quiz-option.correct {
  background: rgba(107, 127, 92, 0.15);
  border-color: var(--jade);
  color: var(--jade);
}
.quiz-option.correct .letter {
  background: var(--jade); color: var(--paper); border-color: var(--jade);
}
.quiz-option.wrong {
  background: rgba(168, 57, 50, 0.12);
  border-color: var(--vermillion);
  color: var(--vermillion);
}
.quiz-option.wrong .letter {
  background: var(--vermillion); color: var(--paper); border-color: var(--vermillion);
}
.quiz-explain {
  margin-top: 14px;
  padding: 12px 16px;
  background: rgba(201, 168, 110, 0.15);
  border-left: 3px solid var(--ochre);
  border-radius: 2px;
  color: var(--ink-light);
  font-size: 14px;
  line-height: 1.7;
  display: none;
}
.quiz-question.answered .quiz-explain { display: block; }

.quiz-summary {
  text-align: center;
  padding: 36px 24px;
  background: linear-gradient(135deg, var(--paper) 0%, var(--paper-dark) 100%);
  border: 2px solid var(--vermillion);
  border-radius: 4px;
  margin-top: 32px;
  display: none;
}
.quiz-summary.show { display: block; }
.quiz-summary .score {
  font-family: var(--font-kai);
  font-size: 60px;
  color: var(--vermillion);
  letter-spacing: 0.1em;
  line-height: 1;
  margin-bottom: 14px;
}
.quiz-summary .score .total {
  color: var(--ink-light);
  font-size: 32px;
}
.quiz-summary .comment {
  color: var(--ink);
  font-size: 17px;
  letter-spacing: 0.15em;
}
.quiz-summary button {
  margin-top: 24px;
  padding: 10px 26px;
  background: transparent;
  border: 1.5px solid var(--vermillion);
  color: var(--vermillion);
  cursor: pointer;
  font-family: var(--font-kai);
  letter-spacing: 0.2em;
  font-size: 14px;
  transition: all 0.2s;
}
.quiz-summary button:hover {
  background: var(--vermillion); color: var(--paper);
}

/* 底部导航到其他诗 */
.nav-other {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(138, 111, 58, 0.25);
}
.nav-other a {
  padding: 20px;
  border: 1px solid rgba(138, 111, 58, 0.3);
  border-radius: 4px;
  background: rgba(245, 238, 219, 0.5);
  transition: all 0.2s;
  color: var(--ink);
}
.nav-other a:hover {
  border-color: var(--vermillion);
  background: rgba(168, 57, 50, 0.05);
}
.nav-other .label {
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.15em;
  margin-bottom: 6px;
}
.nav-other .title {
  font-family: var(--font-kai);
  font-size: 22px;
  letter-spacing: 0.2em;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 640px) {
  .topbar { padding: 12px 20px; }
  .topbar .brand { font-size: 18px; letter-spacing: 0.2em; }
  .topbar nav a { margin-left: 14px; font-size: 13px; }
  .hero { min-height: 60vh; padding: 60px 16px 40px; }
  .poems-section { padding: 40px 20px 60px; }
  .section-title { font-size: 26px; letter-spacing: 0.3em; }
  .poem-page { padding: 24px 18px 60px; }
  .poem-hero { padding: 32px 22px 40px; }
  .poem-body { letter-spacing: 0.2em; }
  .seal-stamp { width: 44px; height: 44px; font-size: 10px; bottom: 16px; right: 16px; }
  .analysis-card { padding: 20px 22px; }
  .quiz-question { padding: 20px 20px; }
}