/* ===== 基础重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4776E6;
  --primary-dark: #3a5fd0;
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --text: #2b2f3a;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --ok: #22c55e;
}

body {
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 头部 ===== */
.hero {
  text-align: center;
  padding: 48px 20px;
  border-radius: 16px;
  background: linear-gradient(135deg, #4776E6 0%, #8E54E9 100%);
  color: #fff;
  margin-bottom: 28px;
  box-shadow: 0 10px 30px rgba(71, 118, 230, 0.35);
}

.badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 16px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero p {
  opacity: 0.9;
  max-width: 560px;
  margin: 0 auto 20px;
}

.server-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px;
}

.server-status .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fbbf24;
  animation: pulse 1.5s infinite;
}

.server-status.ok .dot {
  background: #4ade80;
  animation: none;
}

.server-status.error .dot {
  background: #f87171;
  animation: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  flex: 1;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.card h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 16px;
}

code {
  background: #eef1f7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--primary-dark);
}

/* ===== 状态探测 ===== */
.probe {
  font-size: 14px;
  background: #f9fafb;
  border-radius: 8px;
  padding: 12px 14px;
  border: 1px solid var(--border);
}

.probe .ok {
  color: var(--ok);
}

/* ===== API 测试 ===== */
.api-box {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.api-box input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.api-box input:focus {
  border-color: var(--primary);
}

.api-box button {
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.api-box button:hover {
  background: var(--primary-dark);
}

.api-box button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.api-result {
  background: #0f172a;
  color: #a5b4fc;
  border-radius: 8px;
  padding: 14px;
  font-size: 13px;
  min-height: 48px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ===== 图片资源 ===== */
.image-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: #fafbfe;
}

.image-box span {
  font-size: 13px;
  color: var(--text-light);
}

/* ===== 页脚 ===== */
footer {
  text-align: center;
  padding: 28px 0 8px;
  color: var(--text-light);
  font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 640px) {
  .hero { padding: 32px 16px; }
  .hero h1 { font-size: 26px; }
  .api-box { flex-direction: column; }
}