/* ============================================================
   InkCase — shared stylesheet
   视觉基调:黑白线稿 + 单色红高亮 / 冷峻悬疑 / 档案质感
   配色与字体集中在这里改;改一处,全站生效。
   ============================================================ */

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

:root{
  --ink:        #0d0d0f;   /* 近黑墨色,主背景 */
  --paper:      #f4f1ea;   /* 旧纸米白,文字/亮面 */
  --paper-dim:  #c9c4b8;   /* 暗一档的纸色 */
  --blood:      #c1121f;   /* 证物红,唯一高亮色 */
  --blood-dim:  #7a0c14;
  --line:       #2a2a2e;   /* 分隔线 */
  --grid:       rgba(244,241,234,.05);

  --font-display: 'Special Elite', 'Noto Serif SC', monospace; /* 打字机标题 */
  --font-body:    'Spectral', 'Noto Serif SC', serif;          /* 正文衬线 */
  --font-zh:      'Noto Serif SC', serif;

  --maxw: 1100px;
}

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

html{scroll-behavior:smooth}

body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  line-height:1.65;
  font-size:18px;
  /* 细网格纸纹理 */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-font-smoothing:antialiased;
}

/* 颗粒噪点叠层 */
body::before{
  content:"";
  position:fixed; inset:0; z-index:9999; pointer-events:none;
  opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

/* ---------- 容器 ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
header.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(13,13,15,.82);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  font-family:var(--font-display);
  font-size:1.45rem;letter-spacing:.06em;
  display:flex;align-items:center;gap:.5rem;
}
.brand .mark{color:var(--blood)}
.nav-links{display:flex;gap:1.6rem;align-items:center;font-size:.92rem;letter-spacing:.04em}
.nav-links a{position:relative;padding:.2rem 0;opacity:.82;transition:opacity .2s}
.nav-links a:hover{opacity:1}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-3px;width:0;height:1.5px;
  background:var(--blood);transition:width .25s ease;
}
.nav-links a:hover::after{width:100%}

.lang-toggle{
  font-family:var(--font-display);
  border:1px solid var(--paper-dim);
  background:transparent;color:var(--paper);
  padding:.3rem .7rem;cursor:pointer;font-size:.8rem;letter-spacing:.1em;
  transition:all .2s;
}
.lang-toggle:hover{background:var(--blood);border-color:var(--blood)}

/* ---------- 通用区块标题 ---------- */
.section-label{
  font-family:var(--font-display);
  color:var(--blood);
  letter-spacing:.25em;
  font-size:.78rem;text-transform:uppercase;
  margin-bottom:.6rem;display:flex;align-items:center;gap:.6rem;
}
.section-label::before{content:"";width:30px;height:1px;background:var(--blood)}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.8rem,4vw,2.8rem);
  line-height:1.1;margin-bottom:1.6rem;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--font-display);letter-spacing:.08em;
  border:1px solid var(--paper);
  padding:.7rem 1.4rem;font-size:.85rem;
  cursor:pointer;transition:all .22s;background:transparent;color:var(--paper);
}
.btn:hover{background:var(--blood);border-color:var(--blood);transform:translateY(-2px)}
.btn-blood{background:var(--blood);border-color:var(--blood)}
.btn-blood:hover{background:var(--blood-dim);border-color:var(--blood-dim)}

/* ---------- footer ---------- */
footer.foot{
  border-top:1px solid var(--line);
  margin-top:6rem;padding:3rem 0 4rem;
  font-size:.85rem;color:var(--paper-dim);
}
.foot-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem}

/* ---------- 语言显示控制 ---------- */
[data-lang-en],[data-lang-zh]{display:none}
body.lang-en [data-lang-en]{display:revert}
body.lang-zh [data-lang-zh]{display:revert}
/* 行内元素保持 inline */
span[data-lang-en],span[data-lang-zh]{display:none}
body.lang-en span[data-lang-en]{display:inline}
body.lang-zh span[data-lang-zh]{display:inline}

/* 中文用衬线中文字体 */
body.lang-zh{font-family:var(--font-zh)}

/* ---------- 工具类 ---------- */
.blood{color:var(--blood)}
.center{text-align:center}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ====================  首页 HERO  ==================== */
.hero{
  min-height:88vh;display:flex;flex-direction:column;justify-content:center;
  position:relative;overflow:hidden;
}
.hero .wrap{position:relative;z-index:2}
.hero-kicker{
  font-family:var(--font-display);color:var(--blood);
  letter-spacing:.3em;font-size:.85rem;margin-bottom:1.5rem;text-transform:uppercase;
}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(3rem,11vw,8rem);
  line-height:.92;letter-spacing:-.01em;
}
.hero h1 .case{color:var(--blood)}
.hero-tag{
  margin-top:1.8rem;max-width:540px;font-size:1.15rem;color:var(--paper-dim);
  font-style:italic;
}
.hero-cta{margin-top:2.6rem;display:flex;gap:1rem;flex-wrap:wrap}

/* 大号背景幽灵字 */
.ghost{
  position:absolute;right:-4%;top:50%;transform:translateY(-50%);
  font-family:var(--font-display);
  font-size:38vw;line-height:1;color:transparent;
  -webkit-text-stroke:1px rgba(193,18,31,.10);
  z-index:1;pointer-events:none;user-select:none;white-space:nowrap;
}

/* 红色档案戳 */
.stamp{
  position:absolute;top:18%;right:8%;z-index:3;
  border:3px solid var(--blood);color:var(--blood);
  font-family:var(--font-display);letter-spacing:.15em;
  padding:.6rem 1.2rem;transform:rotate(-12deg);
  font-size:1rem;opacity:.85;
}

/* ====================  案件卡片网格  ==================== */
.case-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:1.4rem;margin-top:2rem;
}
.case-card{
  border:1px solid var(--line);
  background:#121215;
  position:relative;overflow:hidden;
  transition:border-color .25s,transform .25s;
  display:flex;flex-direction:column;
}
.case-card:hover{border-color:var(--blood);transform:translateY(-4px)}
.case-thumb{
  aspect-ratio:4/3;background:#1a1a1e;
  display:flex;align-items:center;justify-content:center;
  border-bottom:1px solid var(--line);overflow:hidden;position:relative;
}
.case-thumb img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05)}
.case-thumb .ph{font-family:var(--font-display);color:#3a3a40;font-size:.8rem;letter-spacing:.15em;text-align:center;padding:1rem}
.case-card .meta{padding:1.3rem 1.4rem 1.6rem}
.case-no{font-family:var(--font-display);color:var(--blood);font-size:.78rem;letter-spacing:.2em}
.case-card h3{font-family:var(--font-display);font-size:1.3rem;margin:.4rem 0 .6rem;line-height:1.15}
.case-card p{font-size:.92rem;color:var(--paper-dim);margin-bottom:1rem}
.case-tag{
  display:inline-block;font-size:.7rem;letter-spacing:.1em;
  border:1px solid var(--blood-dim);color:var(--blood);
  padding:.2rem .6rem;font-family:var(--font-display);
}
.case-card .open{margin-top:auto}

/* ====================  画廊  ==================== */
.gallery-grid{
  columns:3 260px;column-gap:1rem;margin-top:2rem;
}
.gallery-grid figure{
  break-inside:avoid;margin-bottom:1rem;border:1px solid var(--line);
  background:#121215;position:relative;transition:border-color .25s;
}
.gallery-grid figure:hover{border-color:var(--blood)}
.gallery-grid img{width:100%;display:block;filter:grayscale(1) contrast(1.05)}
.gallery-grid figcaption{padding:.6rem .8rem;font-size:.8rem;color:var(--paper-dim);font-style:italic}
.gallery-ph{
  display:flex;align-items:center;justify-content:center;min-height:200px;
  font-family:var(--font-display);color:#3a3a40;font-size:.78rem;letter-spacing:.12em;text-align:center;padding:1rem;
}

/* ====================  案件内页  ==================== */
.case-hero{padding:5rem 0 3rem;border-bottom:1px solid var(--line)}
.case-hero .case-no{font-size:1rem}
.case-hero h1{font-family:var(--font-display);font-size:clamp(2.2rem,6vw,4rem);line-height:1.05;margin:.6rem 0 1rem}
.case-hero .logline{font-size:1.25rem;color:var(--paper-dim);font-style:italic;max-width:640px}
.case-meta-row{display:flex;gap:2rem;margin-top:1.8rem;flex-wrap:wrap;font-size:.85rem}
.case-meta-row .item .k{font-family:var(--font-display);color:var(--blood);letter-spacing:.12em;font-size:.72rem;text-transform:uppercase}
.case-meta-row .item .v{margin-top:.2rem}

/* 案件正文:图文交错 */
.story{max-width:720px;margin:0 auto;padding:3.5rem 0}
.story h2{font-family:var(--font-display);font-size:1.6rem;margin:2.5rem 0 1rem;color:var(--paper)}
.story p{margin-bottom:1.3rem}
.story figure{margin:2.5rem 0;border:1px solid var(--line);background:#121215}
.story figure img{width:100%;display:block;filter:grayscale(1) contrast(1.05)}
.story figure figcaption{padding:.7rem 1rem;font-size:.82rem;color:var(--paper-dim);font-style:italic;border-top:1px solid var(--line)}
.story .img-ph{display:flex;align-items:center;justify-content:center;min-height:280px;font-family:var(--font-display);color:#3a3a40;letter-spacing:.12em;font-size:.8rem;text-align:center;padding:2rem}

/* 线索板 */
.clueboard{border:1px solid var(--blood-dim);background:#15080a;padding:1.6rem 1.8rem;margin:2.5rem 0}
.clueboard .lbl{font-family:var(--font-display);color:var(--blood);letter-spacing:.2em;font-size:.78rem;margin-bottom:1rem;text-transform:uppercase}
.clueboard ul{list-style:none}
.clueboard li{padding:.5rem 0 .5rem 1.4rem;position:relative;border-bottom:1px dashed var(--line)}
.clueboard li:last-child{border-bottom:none}
.clueboard li::before{content:"▸";position:absolute;left:0;color:var(--blood)}

/* 安全启示框 */
.lesson{border-left:3px solid var(--blood);background:#121215;padding:1.4rem 1.6rem;margin:2.5rem 0}
.lesson .lbl{font-family:var(--font-display);color:var(--blood);letter-spacing:.18em;font-size:.78rem;margin-bottom:.6rem;text-transform:uppercase}

/* ====================  互动案件  ==================== */
.interactive{max-width:720px;margin:0 auto;padding:3rem 0}
.choice-card{border:1px solid var(--line);background:#121215;padding:2rem;margin-bottom:1.5rem}
.choice-q{font-family:var(--font-display);font-size:1.3rem;margin-bottom:1.5rem;line-height:1.3}
.choices{display:flex;flex-direction:column;gap:.8rem}
.choice{
  text-align:left;border:1px solid var(--line);background:transparent;color:var(--paper);
  padding:1rem 1.2rem;cursor:pointer;font-family:var(--font-body);font-size:1rem;
  transition:all .2s;display:flex;gap:.8rem;align-items:flex-start;
}
.choice:hover{border-color:var(--blood);background:#15080a}
.choice .key{font-family:var(--font-display);color:var(--blood)}
.feedback{margin-top:1.5rem;padding:1.2rem 1.4rem;border-left:3px solid var(--blood);background:#15080a;display:none}
.feedback.show{display:block;animation:fadeUp .4s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.feedback.correct{border-color:#3a9d4a;background:#0c1a0e}

/* ====================  关于页 / 提交页  ==================== */
.prose{max-width:680px;margin:0 auto;padding:3rem 0}
.prose p{margin-bottom:1.3rem}
.prose h2{font-family:var(--font-display);font-size:1.7rem;margin:2.2rem 0 1rem}
.field{margin-bottom:1.4rem}
.field label{display:block;font-family:var(--font-display);font-size:.82rem;letter-spacing:.1em;margin-bottom:.5rem;color:var(--blood)}
.field input,.field textarea,.field select{
  width:100%;background:#121215;border:1px solid var(--line);color:var(--paper);
  padding:.8rem 1rem;font-family:var(--font-body);font-size:1rem;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blood)}
.note{font-size:.82rem;color:var(--paper-dim);font-style:italic;margin-top:1rem}

/* ---------- 响应式 ---------- */
@media(max-width:680px){
  body{font-size:16px}
  .nav-links{gap:.9rem;font-size:.8rem}
  .nav-links a:not(.lang-wrap a){display:none} /* 手机隐藏次要链接,保留首页/案件 */
  .ghost{display:none}
  .stamp{right:5%;top:12%;font-size:.8rem}
  .gallery-grid{columns:2 150px}
}