/* =================================================================== */
/*  杜绍刚作业本 · 老相册 / 旧剪贴簿 风格                                */
/*  （B · Vintage scrapbook · Style v3）                               */
/* =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Special+Elite&family=Courier+Prime:wght@400;700&family=Lora:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Noto+Serif+SC:wght@300;400;500;600;700&display=swap');

:root{
  /* 军绿/老布料调色盘（β · olive） */
  --paper:        #d4ddc2;     /* 主底色：浅军绿/旧军装绿 */
  --paper-2:      #c4cdaf;     /* 略深 */
  --paper-3:      #b3bd9b;     /* 深的，做阴影 */
  --paper-edge:   #99a47e;     /* 描边、分割线 */
  --photo:        #fffbef;     /* 老照片相纸白（保持发黄米色，跟军绿衬托） */
  --photo-edge:   #c0b894;     /* 相纸边缘——略带军绿调的米色 */
  --tape:         #d8d2b0d0;   /* 老胶带（带绿调的米色） */
  --tape-shadow:  rgba(80, 90, 50, 0.22);

  /* 墨水色（深褐黑色，在军绿上对比清楚） */
  --ink:          #232612;     /* 主文字：深橄榄黑 */
  --ink-2:        #4a4d2e;     /* 次级 */
  --ink-3:        #79805a;     /* 浅级、日期、标签 */
  --ink-muted:    #a3aa84;

  /* 强调色——老红墨 + 牛皮纸棕 */
  --accent:       #a02822;     /* 朱红/旧红墨 */
  --accent-soft:  #c44a3e;
  --brown:        #6b4936;     /* 牛皮纸棕 */
  --highlight-bg: #fff5d4;     /* 老荧光笔黄 */
  --highlight-fg: #8b6f1c;
  --highlight-bd: #d4b85f;

  /* 红字「老师批注」标签 */
  --teacher:      #a02822;
  --teacher-soft: #f9e7e3;

  --shadow-photo: 0 2px 6px rgba(80, 60, 30, 0.15), 0 4px 16px rgba(80, 60, 30, 0.08);
  --shadow-card:  0 1px 3px rgba(80, 60, 30, 0.10), 0 6px 18px rgba(80, 60, 30, 0.05);

  --r-sm: 2px;
  --r-md: 3px;
  --r-lg: 4px;

  --font-typewriter: "Special Elite","Courier Prime","Courier New",monospace;
  --font-mono:       "Courier Prime","Courier New",monospace;
  --font-serif:      "Lora","Noto Serif SC","Songti SC","Georgia",serif;
  --font-sans:       "Lora","Noto Serif SC","PingFang SC","Helvetica Neue",sans-serif;
}

/* ========================= 基础重置 ========================= */
*{ box-sizing: border-box; }

html, body{
  margin: 0; padding: 0;
  font-family: var(--font-serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* 整页老布料纹理：多层渐变 + 苔色斑 */
body{
  background:
    radial-gradient(ellipse at 20% 30%, rgba(70, 90, 40, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 70%, rgba(90, 100, 50, 0.09) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(60, 80, 30, 0.06) 0%, transparent 60%),
    var(--paper);
  background-attachment: fixed;
  min-height: 100vh;
  position: relative;
}

/* 老布料点状纹理（苔色斑/磨损感） */
body::before{
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  background-image:
    radial-gradient(circle at 23% 41%, rgba(80,100,40,0.08) 0%, transparent 1.5%),
    radial-gradient(circle at 68% 17%, rgba(80,100,40,0.06) 0%, transparent 2%),
    radial-gradient(circle at 91% 59%, rgba(80,100,40,0.07) 0%, transparent 1.5%),
    radial-gradient(circle at 12% 84%, rgba(80,100,40,0.06) 0%, transparent 1.8%),
    radial-gradient(circle at 56% 92%, rgba(80,100,40,0.05) 0%, transparent 1.5%),
    radial-gradient(circle at 79% 45%, rgba(80,100,40,0.04) 0%, transparent 1.2%);
  mix-blend-mode: multiply;
}

/* 水墨山松背景：满屏铺开，向四周渐隐 */
body::after{
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("../bg-pines.jpg");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center bottom;
  opacity: 0.45;
  mix-blend-mode: multiply;
  filter: contrast(1.3) brightness(1.2);
  -webkit-mask-image: radial-gradient(ellipse 65% 75% at 50% 65%, rgba(0,0,0,1) 25%, rgba(0,0,0,0) 95%);
  mask-image: radial-gradient(ellipse 65% 75% at 50% 65%, rgba(0,0,0,1) 25%, rgba(0,0,0,0) 95%);
}

main, header, footer{ position: relative; z-index: 1; }

a{
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
  transition: all .15s ease;
}
a:hover{
  color: var(--brown);
  border-bottom-style: solid;
}

code{
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--paper-2);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--brown);
}

/* ========================= 顶部导航条 ========================= */
header.masthead{
  background: var(--paper);
  border-bottom: 1px solid var(--paper-edge);
  position: relative;
}
/* 加一道老旧手绘式细线 */
header.masthead::after{
  content: '';
  position: absolute; left: 0; right: 0; bottom: -3px;
  height: 1px;
  background: repeating-linear-gradient(90deg,
    transparent 0, transparent 4px,
    var(--ink-muted) 4px, var(--ink-muted) 6px);
  opacity: 0.5;
}

.masthead-inner{
  max-width: 920px; margin: 0 auto;
  padding: 22px 24px 18px;
  display: flex; align-items: baseline; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}

.brand{
  display: flex; align-items: baseline; gap: 14px;
}

.brand .title{
  font-family: var(--font-typewriter);
  font-size: 22px; font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.brand .sub{
  font-family: var(--font-typewriter);
  font-size: 12px; color: var(--ink-3);
  letter-spacing: 0.12em;
}

nav.tabs{
  display: flex; gap: 0;
  flex-wrap: wrap;
  border: 1px solid var(--paper-edge);
  border-radius: 2px;
  background: rgba(255, 251, 239, 0.5);
}
nav.tabs button.tab{
  background: transparent;
  border: none;
  border-right: 1px solid var(--paper-edge);
  color: var(--ink-2);
  padding: 8px 16px;
  font-size: 12px;
  font-family: var(--font-typewriter);
  cursor: pointer;
  letter-spacing: 0.15em;
  transition: all .15s ease;
}
nav.tabs button.tab:last-child{ border-right: none; }
nav.tabs button.tab:hover{
  background: var(--paper-2);
  color: var(--ink);
}
nav.tabs button.tab.active{
  background: var(--ink);
  color: var(--paper);
}

/* ========================= 主内容容器 ========================= */
main{
  max-width: 920px;
  margin: 0 auto;
  padding: 36px 24px 80px;
}

.view{ display: none; }
.view.active{ display: block; }

/* ========================= Hero（带歪斜照片） ========================= */
.hero{
  margin: 0 0 50px;
  display: grid;
  grid-template-columns: 0.85fr 1.1fr;
  gap: 36px;
  align-items: flex-start;
  padding-top: 14px;
}

.hero .cover-frame{
  background: var(--photo);
  padding: 14px 14px 56px;
  border: 1px solid var(--photo-edge);
  box-shadow: var(--shadow-photo);
  transform: rotate(-2.2deg);
  position: relative;
  margin: 0 auto;
  max-width: 320px;
}
/* 假胶带效果——左上、右上 */
.hero .cover-frame::before,
.hero .cover-frame::after{
  content: '';
  position: absolute;
  width: 70px; height: 22px;
  background: var(--tape);
  box-shadow: 0 1px 3px var(--tape-shadow);
}
.hero .cover-frame::before{
  top: -10px; left: 18px;
  transform: rotate(-8deg);
}
.hero .cover-frame::after{
  top: -8px; right: 24px;
  transform: rotate(6deg);
}
.hero .cover-img{
  display: block; width: 100%; height: auto;
}
.hero .cover-cap{
  position: absolute;
  bottom: 16px; left: 0; right: 0;
  text-align: center;
  font-family: var(--font-typewriter);
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.05em;
}

.hero-text{
  padding-top: 12px;
}
.hero-text .date-stamp{
  display: inline-block;
  font-family: var(--font-typewriter);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.22em;
  border: 2px solid var(--accent);
  padding: 4px 12px;
  margin-bottom: 18px;
  transform: rotate(-1.5deg);
  border-radius: 1px;
}

.hero-text h1{
  font-family: var(--font-typewriter);
  font-size: 38px;
  font-weight: 400;
  color: var(--ink);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.hero-text .sub-title{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
  margin-bottom: 20px;
  border-bottom: 1px dashed var(--paper-edge);
  padding-bottom: 12px;
}

.hero-text .lead{
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink);
  line-height: 1.95;
  margin: 0 0 14px;
}

.hero-text .lead-sub{
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.9;
  font-style: italic;
}

/* 统计——做成「老式标签贴纸」感 */
.stats{
  display: flex; gap: 14px;
  margin: 22px 0 0;
  flex-wrap: wrap;
}
.stat-card{
  flex: 1 1 100px;
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  padding: 14px 16px;
  text-align: center;
  position: relative;
  box-shadow: 0 1px 3px rgba(80,60,30,0.1);
}
.stat-card:nth-child(1){ transform: rotate(-1deg); }
.stat-card:nth-child(2){ transform: rotate(0.8deg); }
.stat-card:nth-child(3){ transform: rotate(-0.5deg); }

.stat-card .num{
  display: block;
  font-family: var(--font-typewriter);
  font-size: 26px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-card .lbl{
  font-family: var(--font-typewriter);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
}

/* origin-card：仿剪贴簿"小卡片" */
.origin-card{
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  padding: 24px 28px;
  margin: 22px 0;
  box-shadow: var(--shadow-card);
  position: relative;
}
.origin-card h3{
  font-family: var(--font-typewriter);
  font-size: 16px;
  font-weight: 700;
  color: var(--brown);
  margin: 0 0 12px;
  letter-spacing: 0.1em;
  display: inline-block;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}
.origin-card h3:not(:first-child){ margin-top: 22px; }
.origin-card p{
  font-family: var(--font-serif);
  font-size: 14.5px;
  color: var(--ink);
  line-height: 1.95;
  margin: 8px 0;
}

/* ========================= 篇目区 ========================= */
.section-title{
  display: flex; align-items: baseline; gap: 14px;
  margin: 14px 0 6px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8px;
}
.section-title .name{
  font-family: var(--font-typewriter);
  font-size: 24px; font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.06em;
}
.section-title .count{
  font-family: var(--font-mono);
  font-size: 12px; color: var(--ink-3);
  letter-spacing: 0.15em;
  margin-left: auto;
}
.section-sub{
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--ink-2);
  font-style: italic;
  margin: 6px 0 28px;
}

/* 篇目卡片：老相册条目 */
.cards{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.article-card{
  display: block;
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  padding: 18px 20px 56px;
  text-decoration: none; color: inherit;
  border-bottom: 1px solid var(--photo-edge);
  transition: all .2s ease;
  box-shadow: var(--shadow-card);
  position: relative;
  min-height: 200px;
}
.article-card:hover{
  transform: translateY(-3px) rotate(0.3deg);
  box-shadow: 0 4px 10px rgba(80,60,30,0.12), 0 10px 24px rgba(80,60,30,0.08);
}
/* 每张卡片随机一点点旋转 */
.article-card:nth-child(3n+1){ transform: rotate(-0.6deg); }
.article-card:nth-child(3n+2){ transform: rotate(0.4deg); }
.article-card:nth-child(3n+3){ transform: rotate(-0.2deg); }
.article-card:nth-child(3n+1):hover{ transform: rotate(0deg) translateY(-3px); }
.article-card:nth-child(3n+2):hover{ transform: rotate(0deg) translateY(-3px); }
.article-card:nth-child(3n+3):hover{ transform: rotate(0deg) translateY(-3px); }

/* 卡片左上角的"小相角" */
.article-card::before{
  content: '';
  position: absolute; top: -1px; left: -1px;
  width: 0; height: 0;
  border-top: 22px solid var(--photo-edge);
  border-right: 22px solid transparent;
  opacity: 0.6;
}

.article-card .ord-block{
  display: flex; align-items: baseline; gap: 8px;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--photo-edge);
  padding-bottom: 6px;
}
.article-card .ord{
  font-family: var(--font-typewriter);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
}
.article-card .ord-num{
  font-family: var(--font-typewriter);
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.article-card .body{ min-height: 80px; }
.article-card .title{
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.article-card .summary{
  font-family: var(--font-serif);
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 卡片底部信息条 */
.article-card .right{
  position: absolute;
  bottom: 14px; left: 20px; right: 20px;
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 10px;
  border-top: 1px dashed var(--photo-edge);
}
.article-card .pages{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.05em;
}
.badge-pending, .badge-ready{
  display: inline-block;
  font-family: var(--font-typewriter);
  font-size: 10px;
  padding: 2px 8px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border-radius: 1px;
  text-transform: uppercase;
}
.badge-pending{
  background: var(--highlight-bg);
  color: var(--highlight-fg);
  border: 1px solid var(--highlight-bd);
}
.badge-ready{
  background: #e1f5ee;
  color: #1d6e56;
  border: 1px solid #9fe1cb;
}

/* ========================= 详情页 ========================= */
.back-link{
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-typewriter);
  font-size: 12px;
  color: var(--ink-2);
  border: none;
  margin-bottom: 22px;
  letter-spacing: 0.15em;
  background: transparent;
}
.back-link::before{ content: '‹'; font-size: 18px; line-height: 1; }
.back-link:hover{ color: var(--accent); }

.article-header{
  margin-bottom: 36px;
  padding: 18px 0 22px;
  border-bottom: 2px solid var(--ink);
  position: relative;
  text-align: center;
}
.article-header::before{
  content: '';
  position: absolute;
  top: 8px; left: 0; right: 0;
  height: 1px;
  background: var(--ink);
}
.article-header .ord{
  display: inline-block;
  font-family: var(--font-typewriter);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.3em;
  border: 1.5px solid var(--accent);
  padding: 3px 12px;
  margin-bottom: 14px;
  transform: rotate(-1deg);
}
.article-header h2.title{
  font-family: var(--font-typewriter);
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
  letter-spacing: 0.04em;
  line-height: 1.3;
}
.article-header .meta{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.1em;
}
.article-header .meta span{ margin-right: 14px; }

.section-block{ margin: 40px 0; }
.section-block h3{
  font-family: var(--font-typewriter);
  font-size: 18px;
  font-weight: 700;
  color: var(--brown);
  margin: 0 0 16px;
  display: flex; align-items: center; gap: 10px;
  letter-spacing: 0.12em;
  border-bottom: 1px dashed var(--paper-edge);
  padding-bottom: 6px;
}
.section-block h3::before{
  content: '✦';
  color: var(--accent);
  font-size: 14px;
}

/* 文字稿 */
.transcript{
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  padding: 26px 30px;
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--ink);
  line-height: 2.0;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-card);
}
.transcript p{ margin: 0 0 14px; }
.transcript p:last-child{ margin-bottom: 0; }
.transcript .uncertain{
  background: var(--highlight-bg);
  color: var(--highlight-fg);
  padding: 0 4px;
}
.transcript .unreadable{
  color: var(--ink-3);
  background: var(--paper-2);
  padding: 0 4px;
}
.transcript .pending-note{
  text-align: center;
  font-family: var(--font-typewriter);
  font-size: 13px;
  color: var(--ink-3);
  padding: 18px 0 4px;
  border-top: 1px dashed var(--paper-edge);
  letter-spacing: 0.05em;
}
.transcript .keyword-block{
  margin: 20px 0;
  padding: 14px 18px;
  background: var(--paper);
  border: 1px dashed var(--paper-edge);
  position: relative;
}
.transcript .keyword-block .lbl{
  font-family: var(--font-typewriter);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
  margin-bottom: 10px;
}
.transcript .keyword-block .chips{
  display: flex; flex-wrap: wrap; gap: 6px;
}
.transcript .keyword-chip{
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--highlight-bg);
  color: var(--highlight-fg);
  border: 1px solid var(--highlight-bd);
  padding: 3px 10px;
  letter-spacing: 0.04em;
}

/* 原件照片：歪斜的老相册风 */
.scans-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 26px;
  padding: 12px 0;
}
.scan-tile{
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  padding: 12px 12px 38px;
  cursor: pointer;
  transition: all .2s ease;
  position: relative;
  box-shadow: var(--shadow-photo);
}
/* 每个相片片随机一点点旋转 */
.scan-tile:nth-child(4n+1){ transform: rotate(-1.2deg); }
.scan-tile:nth-child(4n+2){ transform: rotate(0.9deg); }
.scan-tile:nth-child(4n+3){ transform: rotate(-0.4deg); }
.scan-tile:nth-child(4n+4){ transform: rotate(1.5deg); }
.scan-tile:hover{
  transform: rotate(0deg) translateY(-4px) scale(1.03);
  box-shadow: 0 6px 14px rgba(80,60,30,0.18), 0 12px 28px rgba(80,60,30,0.12);
  z-index: 2;
}
.scan-tile img{
  display: block; width: 100%; height: auto;
}
.scan-tile .cap{
  position: absolute;
  bottom: 10px; left: 0; right: 0;
  text-align: center;
  font-family: var(--font-typewriter);
  font-size: 12px;
  color: var(--ink-2);
  letter-spacing: 0.1em;
}
.scan-tile.teacher-only::after{
  content: '老师批注';
  position: absolute; top: 18px; right: 18px;
  background: var(--teacher);
  color: #fff;
  font-family: var(--font-typewriter);
  font-size: 9px;
  padding: 3px 7px;
  letter-spacing: 0.15em;
  transform: rotate(8deg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 视频块 */
.video-block{
  background: var(--photo);
  border: 1px dashed var(--photo-edge);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.video-block .placeholder{
  font-family: var(--font-serif);
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.95;
  font-style: italic;
}
.video-block .placeholder strong{ color: var(--accent); font-style: normal; }
.video-block video,
.video-block iframe{
  width: 100%; max-width: 720px; height: auto;
  aspect-ratio: 16/9;
  border: 6px solid var(--photo);
  box-shadow: var(--shadow-photo);
}

/* 上一篇/下一篇 */
.nav-prev-next{
  margin-top: 56px;
  padding-top: 24px;
  border-top: 2px dashed var(--paper-edge);
  display: flex; justify-content: space-between;
  gap: 14px; flex-wrap: wrap;
}
.nav-prev-next a{
  font-family: var(--font-typewriter);
  font-size: 13px; color: var(--ink-2);
  border: 1px solid var(--photo-edge);
  background: var(--photo);
  letter-spacing: 0.1em;
  padding: 10px 16px;
  text-decoration: none;
  transition: all .15s ease;
  box-shadow: 0 1px 2px rgba(80,60,30,0.06);
}
.nav-prev-next a:hover{
  background: var(--paper-2);
  color: var(--accent);
  transform: translateY(-1px);
}

/* ========================= 灯箱 ========================= */
.lightbox{
  position: fixed; inset: 0;
  background: rgba(20, 15, 8, 0.94);
  display: none; align-items: center; justify-content: center;
  z-index: 2000; cursor: zoom-out;
  padding: 20px;
}
.lightbox.show{ display: flex; }
.lightbox img{
  max-width: 96vw; max-height: 88vh;
  object-fit: contain;
  background: var(--photo);
  padding: 14px 14px 50px;
  border: 1px solid var(--photo-edge);
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
}
.lightbox .lb-cap{
  position: absolute; bottom: 18px;
  left: 50%; transform: translateX(-50%);
  background: var(--photo);
  color: var(--ink);
  padding: 6px 16px;
  font-family: var(--font-typewriter);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.lightbox .lb-close,
.lightbox .lb-prev,
.lightbox .lb-next{
  background: var(--photo);
  border: 1px solid var(--photo-edge);
  cursor: pointer;
  color: var(--ink);
  position: absolute;
  font-family: var(--font-typewriter);
}
.lightbox .lb-close{
  top: 18px; right: 20px;
  width: 36px; height: 36px;
  font-size: 20px;
}
.lightbox .lb-prev,
.lightbox .lb-next{
  top: 50%; transform: translateY(-50%);
  width: 50px; height: 50px;
  font-size: 24px;
}
.lightbox .lb-prev{ left: 20px; }
.lightbox .lb-next{ right: 20px; }

/* 下载链接（按钮） */
a.btn-primary{
  display: inline-block;
  background: var(--accent);
  color: var(--photo) !important;
  padding: 10px 20px;
  border: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  font-family: var(--font-typewriter);
  font-size: 13px;
  letter-spacing: 0.1em;
  margin-top: 8px;
  box-shadow: 0 1px 3px rgba(160,40,34,0.2);
  text-decoration: none;
}
a.btn-primary:hover{
  background: #8b1f1a;
  color: var(--photo) !important;
  border-color: #8b1f1a;
  border-bottom-color: #8b1f1a;
}
a.btn-secondary{
  display: inline-block;
  background: var(--paper);
  color: var(--ink) !important;
  padding: 10px 20px;
  border: 1px solid var(--photo-edge);
  border-bottom: 1px solid var(--photo-edge);
  font-family: var(--font-typewriter);
  font-size: 13px;
  letter-spacing: 0.1em;
  margin-top: 8px;
  text-decoration: none;
  box-shadow: 0 1px 2px rgba(80,60,30,0.08);
}
a.btn-secondary:hover{
  background: var(--paper-2);
  border-color: var(--ink-3);
  border-bottom-color: var(--ink-3);
}

/* 下载链接也用 typewriter */
a[download]{
  font-family: var(--font-typewriter);
}

/* ========================= 底部 ========================= */
footer{
  margin-top: 60px;
  padding: 26px 16px 36px;
  text-align: center;
  font-family: var(--font-typewriter);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
}
footer .divider{
  display: block; width: 60px; height: 1px;
  background: var(--ink-muted);
  margin: 0 auto 18px;
}

/* ========================= 移动端 ========================= */
@media (max-width: 720px){
  .masthead-inner{ padding: 16px 18px 14px; flex-direction: column; align-items: flex-start; gap: 12px; }
  .brand .title{ font-size: 18px; }
  nav.tabs{ width: 100%; }
  nav.tabs button.tab{ flex: 1; padding: 8px 6px; font-size: 11px; }
  main{ padding: 24px 18px 60px; }
  .hero{ grid-template-columns: 1fr; gap: 28px; }
  .hero .cover-frame{ max-width: 240px; }
  .hero-text h1{ font-size: 28px; }
  .hero-text .lead{ font-size: 15px; }
  .stats{ gap: 10px; }
  .stat-card{ padding: 10px 12px; flex: 1 1 80px; }
  .stat-card .num{ font-size: 22px; }
  .article-header h2.title{ font-size: 24px; }
  .transcript{ padding: 18px 20px; font-size: 14px; }
  .cards{ grid-template-columns: 1fr; }
}