/* ===== 主页（index.html）样式 ===== */
:root {
  --bg: #0e1116;
  --bg-soft: #141922;
  --card: #1a2029;
  --card-2: #1f2733;
  --border: #2a3342;
  --txt: #e8eaed;
  --sub: #9aa3b2;
  --dim: #6b7280;
  --blue: #3b98f0;
  --violet: #8b7cf6;
  --green: #3ecf8e;
  --amber: #f0b429;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  min-height: 100vh;
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(59, 152, 240, .10), transparent 60%),
    radial-gradient(700px 380px at 10% 110%, rgba(139, 124, 246, .08), transparent 60%),
    var(--bg);
  color: var(--txt);
  font-family: "Segoe UI", "Microsoft YaHei", -apple-system, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 56px 24px 64px;
}

.header { text-align: center; max-width: 860px; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 18px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-soft); color: var(--sub); font-size: 13px; letter-spacing: 1px;
}
.kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
h1 {
  margin-top: 22px; font-size: 34px; font-weight: 700; letter-spacing: 1px; line-height: 1.3;
}
h1 .grad {
  background: linear-gradient(90deg, #4aa8ff, #8b7cf6);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sub { margin-top: 14px; color: var(--sub); font-size: 14.5px; line-height: 1.8; }

.notice {
  margin-top: 20px; display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 10px; font-size: 12.5px;
  background: rgba(229, 72, 77, .10); border: 1px solid rgba(229, 72, 77, .4); color: #ffb4b6;
}

.grid {
  margin-top: 44px; width: 100%; max-width: 1040px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.report-card {
  position: relative; display: flex; flex-direction: column;
  background: linear-gradient(170deg, var(--card), var(--card-2));
  border: 1px solid var(--border); border-radius: 16px; padding: 26px 24px 22px;
  text-decoration: none; color: var(--txt);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
  overflow: hidden;
}
.report-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--accent, var(--blue));
}
.report-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent, var(--blue));
  box-shadow: 0 14px 34px rgba(0, 0, 0, .4);
}
.badge {
  align-self: flex-start; padding: 4px 12px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; letter-spacing: 1px;
  color: var(--accent, var(--blue));
  background: color-mix(in srgb, var(--accent, var(--blue)) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent, var(--blue)) 45%, transparent);
}
.report-card h2 { margin-top: 16px; font-size: 18.5px; line-height: 1.5; }
.report-card p { margin-top: 10px; font-size: 13px; color: var(--sub); line-height: 1.85; flex: 1; }
.tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 7px; }
.tags span {
  padding: 3px 10px; border-radius: 6px; font-size: 11px;
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--dim);
}
.enter {
  margin-top: 18px; display: flex; align-items: center; justify-content: space-between;
  font-size: 13.5px; font-weight: 600; color: var(--accent, var(--blue));
}
.enter .arrow { transition: transform .2s ease; }
.report-card:hover .arrow { transform: translateX(5px); }

.footer { margin-top: 48px; color: var(--dim); font-size: 12px; letter-spacing: .5px; text-align: center; line-height: 2; }

/* ===== 移动端 / 小屏自适应 ===== */
@media (max-width: 900px) {
  body { padding: 40px 18px 48px; }
  h1 { font-size: 27px; }
  .sub { font-size: 13.5px; }
}
@media (max-width: 768px) {
  body { padding: 30px 14px 40px; }
  h1 { font-size: 22.5px; }
  .header .kicker { font-size: 12px; padding: 6px 14px; }
  .sub { font-size: 13px; margin-top: 10px; }
  .notice { font-size: 11.5px; padding: 7px 12px; }
  .grid { margin-top: 30px; gap: 16px; }
  .report-card { padding: 20px 18px 18px; }
  .report-card h2 { font-size: 16.5px; }
  .report-card p { font-size: 12.5px; }
  .footer { margin-top: 34px; font-size: 11px; }
}