/* 全局现代化样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
:root {
  --primary: #ff2442;
  --card: #fff;
  --bg: #f7f8fa;
  --text: #222;
  --gray: #666;
}
body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a {
  text-decoration: none;
  color: var(--primary);
}
button {
  cursor: pointer;
}

/* 顶部导航 */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 60px;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  z-index: 999;
}
.header h1 {
  font-size: 20px;
  color: var(--primary);
  font-weight: 700;
}

/* 用户栏 */
.user-bar {
  margin-top: 60px;
  padding: 12px 20px;
  background: var(--card);
  text-align: right;
  font-size: 14px;
}
.user-bar a {
  margin-left: 12px;
  font-weight: 500;
}

/* 容器 */
.container {
  max-width: 750px;
  margin: 20px auto;
  padding: 0 20px;
}

/* 笔记卡片 */
.note-card {
  background: var(--card);
  border-radius: 18px;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  transition: transform 0.2s;
}
.note-card:hover {
  transform: translateY(-3px);
}
.note-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.note-info {
  padding: 16px 20px;
}
.note-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.note-time {
  font-size: 12px;
  color: #999;
}

/* 发布按钮 */
.publish-btn {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 65px;
  height: 65px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 28px;
  box-shadow: 0 6px 16px rgba(255,36,66,0.3);
}

/* 登录/注册 高级卡片 */
.login-box {
  max-width: 420px;
  margin: 100px auto;
  padding: 40px 35px;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}
.login-box h2 {
  text-align: center;
  color: var(--primary);
  margin-bottom: 25px;
  font-size: 24px;
}
.login-box input {
  width: 100%;
  padding: 14px 16px;
  margin: 10px 0;
  border: 1px solid #eee;
  border-radius: 12px;
  font-size: 15px;
  outline: none;
  transition: border 0.2s;
}
.login-box input:focus {
  border-color: var(--primary);
}
.login-box button {
  width: 100%;
  padding: 15px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  margin-top: 10px;
}

/* 发布表单 */
.form-box {
  background: #fff;
  border-radius: 20px;
  padding: 25px;
  margin-top: 25px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.04);
}
.form-box input,
.form-box textarea {
  width: 100%;
  padding: 14px;
  border: 1px solid #eee;
  border-radius: 12px;
  margin-bottom: 12px;
  font-size: 15px;
  outline: none;
}
.form-box button {
  width: 100%;
  padding: 15px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-weight: 600;
}

/* 详情 */
.detail-img {
  width: 100%;
  border-radius: 18px;
  margin: 15px 0;
}