/* ============================================================
   信息差日报 - 样式
   支持亮/暗主题（通过 :root 与 [data-theme="dark"] 切换）
   ============================================================ */

:root {
  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --text: #1f2430;
  --text-soft: #5b6472;
  --text-faint: #9aa3b2;
  --border: #e7e9f0;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 60%, #ec4899 100%);
  --shadow: 0 8px 24px rgba(31, 36, 48, 0.08);
  --shadow-sm: 0 2px 8px rgba(31, 36, 48, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --bg-soft: #171a23;
  --bg-elev: #1c2030;
  --text: #e8ebf2;
  --text-soft: #aab2c2;
  --text-faint: #6b7488;
  --border: #2a2f3e;
  --accent: #818cf8;
  --accent-2: #a78bfa;
  --accent-grad: linear-gradient(135deg, #818cf8 0%, #a78bfa 60%, #f472b6 100%);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }

/* 顶部导航 */
.nav {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1080px; margin: 0 auto; padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.nav-brand { font-weight: 800; font-size: 16px; color: var(--text); }
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  font-size: 14px; color: var(--text-soft); padding: 7px 14px;
  border-radius: 999px; transition: .15s;
}
.nav-links a:hover { color: var(--accent); background: var(--bg); }
.nav-links a.active { color: #fff; background: var(--accent); }
@media (max-width: 560px){
  .nav { flex-direction: column; gap: 10px; align-items: flex-start; }
}

/* ---------- 顶部 Hero ---------- */
.hero {
  position: relative;
  padding: 38px 24px 30px;
  background: var(--accent-grad);
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -60px; top: -60px;
  width: 240px; height: 240px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}
.hero::before {
  content: "";
  position: absolute;
  left: -40px; bottom: -80px;
  width: 200px; height: 200px;
  background: rgba(255, 255, 255, 0.10);
  border-radius: 50%;
}
.hero-inner { position: relative; z-index: 1; max-width: 1080px; margin: 0 auto; }
.hero h1 { margin: 0; font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.hero .sub { margin: 8px 0 0; opacity: 0.92; font-size: 14px; }
.hero .meta { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; font-size: 13px; }
.hero .meta .pill {
  background: rgba(255, 255, 255, 0.18);
  padding: 4px 12px; border-radius: 999px; backdrop-filter: blur(4px);
}

/* ---------- 布局 ---------- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 22px 24px 60px; }

/* 统计条 */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 14px; margin: 22px 0 18px;
}
.stat {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px; box-shadow: var(--shadow-sm);
}
.stat .num { font-size: 26px; font-weight: 800; color: var(--accent); }
.stat .lbl { font-size: 12px; color: var(--text-soft); margin-top: 2px; }

/* 控制条 */
.controls {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin-bottom: 18px;
}
.search {
  flex: 1 1 260px; position: relative;
}
.search input {
  width: 100%; padding: 11px 14px 11px 38px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elev); color: var(--text); font-size: 14px;
  outline: none; transition: border-color .2s, box-shadow .2s;
}
.search input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.search svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); opacity: .5; }

select, .btn {
  padding: 10px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-elev);
  color: var(--text); font-size: 13px; cursor: pointer; outline: none;
}
.btn { display: inline-flex; align-items: center; gap: 6px; }
.btn:hover, select:hover { border-color: var(--accent); }
.btn.ghost { background: transparent; }

/* 分类 chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 999px; cursor: pointer;
  font-size: 13px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text-soft);
  transition: all .15s; user-select: none;
}
.chip:hover { transform: translateY(-1px); }
.chip.active { color: #fff; border-color: transparent; font-weight: 600; }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; }

/* 归档 */
.archive { margin: 26px 0 4px; }
.archive h3 { font-size: 15px; color: var(--text-soft); margin: 0 0 10px; font-weight: 700; }
.archive-days { display: flex; flex-wrap: wrap; gap: 8px; }
.day {
  padding: 7px 13px; border-radius: 10px; cursor: pointer; font-size: 13px;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-soft);
}
.day.active { background: var(--accent-grad); color: #fff; border-color: transparent; }
.day b { color: var(--text); }
.day.active b { color: #fff; }

/* 卡片网格 */
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px; margin-top: 18px;
}
.card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-sm);
  position: relative; transition: transform .15s, box-shadow .15s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card .top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  color: #fff;
}
.fav {
  border: none; background: transparent; cursor: pointer; font-size: 18px;
  color: var(--text-faint); line-height: 1; padding: 2px;
}
.fav.on { color: #f59e0b; }
.card h2 { font-size: 17px; margin: 0 0 8px; line-height: 1.4; }
.card .summary { font-size: 14px; color: var(--text-soft); margin: 0 0 12px; }
.card .opp {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-left: 3px solid var(--accent);
  padding: 10px 12px; border-radius: 8px; font-size: 13.5px; margin-bottom: 12px;
}
.card .opp .lab { font-weight: 700; color: var(--accent); display: block; margin-bottom: 3px; font-size: 12px; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.tag { font-size: 11px; color: var(--text-soft); background: var(--bg); border: 1px solid var(--border); padding: 2px 8px; border-radius: 6px; }
.card .foot { display: flex; justify-content: space-between; align-items: center; margin-top: auto; font-size: 12px; color: var(--text-faint); }
.heat { letter-spacing: 1px; }

.empty { text-align: center; color: var(--text-faint); padding: 50px 0; grid-column: 1/-1; }

/* 信息说明框 */
.note {
  background: var(--bg-soft); border: 1px dashed var(--border);
  border-radius: var(--radius-sm); padding: 16px 18px; margin: 22px 0 4px;
  font-size: 13px; color: var(--text-soft);
}
.note b { color: var(--text); }

/* 页脚 */
.footer {
  text-align: center; color: var(--text-faint); font-size: 12px;
  padding: 30px 24px 40px; border-top: 1px solid var(--border); margin-top: 30px;
}

/* 主题切换按钮 */
.theme-toggle {
  position: absolute; right: 18px; top: 18px; z-index: 2;
  background: rgba(255,255,255,.2); border: none; color: #fff;
  width: 38px; height: 38px; border-radius: 50%; cursor: pointer; font-size: 17px;
  backdrop-filter: blur(4px);
}
.theme-toggle:hover { background: rgba(255,255,255,.32); }

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 24px; }
}

/* ===== 创业机会扫描页 ===== */
.opp-hero { text-align: center; }
.hero-stats { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
.hero-stats .stat {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 18px; min-width: 96px; box-shadow: var(--shadow-sm);
}
.hero-stats .stat b { display: block; font-size: 22px; color: var(--accent); }
.hero-stats .stat span { font-size: 12px; color: var(--text-soft); }

.controls { max-width: 1080px; margin: 22px auto 8px; padding: 0 24px; }
.search-box input {
  width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-elev); color: var(--text); font-size: 14px; outline: none;
}
.search-box input:focus { border-color: var(--accent); }
.filter-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.chip {
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-soft);
  padding: 6px 13px; border-radius: 999px; font-size: 13px; cursor: pointer; transition: .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.sort-row { display: flex; align-items: center; gap: 10px; margin-top: 14px; font-size: 13px; color: var(--text-soft); }
.sort-row select { padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-elev); color: var(--text); }
.result-count { margin-left: auto; }

.opp-grid {
  max-width: 1080px; margin: 18px auto 40px; padding: 0 24px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px;
}
.opp-card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow-sm); cursor: pointer; transition: .18s; display: flex; flex-direction: column;
}
.opp-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--accent); }
.opp-top { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.badge { font-size: 11px; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.badge.cat { background: rgba(99,102,241,.12); color: var(--accent); }
.badge.pat { background: rgba(139,92,246,.12); color: var(--accent-2); }
.badge.score { background: rgba(245,158,11,.14); color: #d97706; margin-left: auto; }
.opp-name { font-size: 17px; margin: 10px 0 8px; color: var(--text); line-height: 1.35; }
.opp-why { font-size: 13px; color: var(--text-soft); line-height: 1.6; margin: 0 0 14px; flex: 1; }
.opp-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.opp-cost { font-size: 12px; color: var(--text-faint); }
.btn-detail { border: none; background: var(--accent-grad); color: #fff; padding: 7px 13px; border-radius: 8px; font-size: 13px; cursor: pointer; white-space: nowrap; }
.btn-detail:hover { opacity: .9; }
.empty { color: var(--text-faint); text-align: center; grid-column: 1/-1; padding: 40px; }

.modal { position: fixed; inset: 0; z-index: 50; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(15,17,23,.5); backdrop-filter: blur(3px); }
.modal-card {
  position: relative; background: var(--bg-soft); border-radius: var(--radius); max-width: 720px; width: 92%;
  max-height: 86vh; overflow-y: auto; padding: 26px 28px; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.modal-close { position: absolute; top: 12px; right: 16px; border: none; background: none; font-size: 26px; color: var(--text-faint); cursor: pointer; line-height: 1; }
.modal-close:hover { color: var(--text); }
.m-head { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.m-head .badge.score { margin-left: 0; }
#modalBody h2 { font-size: 22px; margin: 6px 0 4px; }
.m-date { font-size: 12px; color: var(--text-faint); margin: 0 0 14px; }
.m-row { display: grid; grid-template-columns: 132px 1fr; gap: 10px; padding: 9px 0; border-top: 1px dashed var(--border); }
.m-label { font-size: 13px; font-weight: 700; color: var(--accent); }
.m-val { font-size: 13.5px; color: var(--text); line-height: 1.65; }
.m-val ul { margin: 0; padding-left: 18px; }
.m-val li { margin: 3px 0; }
@media (max-width: 600px) {
  .m-row { grid-template-columns: 1fr; gap: 2px; }
  .opp-grid { grid-template-columns: 1fr; }
}