/* ===== 基础变量：白底 + 柔和灰蓝 ===== */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1b1d21;
  --text-dim: #6b7280;
  --text-faint: #9aa1ab;
  --line: #e9ebef;
  --accent: #4f7cff;
  --accent-soft: #eef2ff;
  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 20px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  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;
}

.page {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 28px 64px;
}

/* ===== 主体双栏布局 ===== */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: start;
}

/* 左栏：about + works 都在 col 1 */
.section-about {
  grid-column: 1;
  margin-top: 32px;
}

.section-works {
  grid-column: 1;
  margin-top: 28px;
}

/* 右栏：chat 独占 col 2 */
.section-chat {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin-top: 32px;
}

/* 桌面端：聊天区 sticky，滚动时钉住 */
@media (min-width: 900px) {
  .section-chat {
    position: sticky;
    top: 24px;
  }
}

/* ===== 头部 ===== */
.hero {
  text-align: center;
  padding: 24px 0 48px;
  border-bottom: 1px solid var(--line);
}

.avatar {
  width: 84px;
  height: 84px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, #dbe4ff 0%, #eef2ff 50%, #f3f0ff 100%);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.avatar-text {
  font-size: 32px;
  font-weight: 600;
  color: #4b5a80;
  letter-spacing: 2px;
}

.name {
  margin: 0;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: 1px;
}

.tagline {
  margin: 12px 0 0;
  font-size: 17px;
  color: var(--text-faint);
}

.hero-email {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.hero-email-link {
  font-size: 14px;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.hero-email-link:hover {
  opacity: 0.75;
  text-decoration: underline;
}

.hero-email-sub {
  font-size: 12px;
  color: var(--text-faint);
}

.hero-meta {
  margin-top: 24px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.chip {
  display: inline-block;
  padding: 3px 11px;
  font-size: 12px;
  color: #43506e;
  background: var(--accent-soft);
  border: 1px solid #e0e7ff;
  border-radius: 999px;
}

/* ===== 区块 ===== */
.section {
  margin-top: 28px;
}

.section-title {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.section-note {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-faint);
}

/* 模型连接状态徽标 */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 400;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text-dim);
  background: #fff;
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-online {
  color: #2f9e63;
  border-color: #cdeedb;
  background: #f2fbf6;
}

.status-offline {
  color: #b4791f;
  border-color: #f0e2c4;
  background: #fdf8ee;
}

.status-loading {
  color: var(--text-faint);
}

/* ===== 信息卡片 ===== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-accent {
  background: linear-gradient(160deg, #f7f9ff 0%, #ffffff 70%);
  border-color: #e0e7ff;
}

.card-label {
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.card-value {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
}

.card-sub {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== 聊天区 ===== */
.chat {
  background: var(--surface);
  border: 1px solid #e0e7ff;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(79, 124, 255, 0.08);
  overflow: hidden;
}

.chat-log {
  height: 460px;
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #fcfcfd;
  scroll-behavior: smooth;
}

.msg {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-bot {
  align-self: flex-start;
  background: #f1f3f7;
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.msg-user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

/* 降级 / 报错提示 */
.msg-notice {
  align-self: center;
  max-width: 92%;
  padding: 6px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: #9a6b12;
  background: #fdf6e7;
  border: 1px solid #f2e4c4;
  border-radius: 10px;
  white-space: pre-wrap;
}

.typing span {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 2px;
  border-radius: 50%;
  background: #aab2c0;
  animation: blink 1.2s infinite ease-in-out;
}

.typing span:nth-child(2) { animation-delay: 0.2s; }
.typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 80%, 100% { opacity: 0.25; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-2px); }
}

/* 快捷问题 */
.quick-questions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 18px 0;
  border-top: 1px solid var(--line);
}

.q-chip {
  padding: 6px 12px;
  font-size: 13px;
  font-family: inherit;
  color: #43506e;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.q-chip:hover {
  background: var(--accent-soft);
  border-color: #d7e0ff;
}

/* 输入区 */
.chat-input {
  display: flex;
  gap: 8px;
  padding: 14px 18px 18px;
}

.chat-input input {
  flex: 1;
  min-width: 0;
  padding: 11px 14px;
  font-size: 14.5px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.chat-input input:focus {
  border-color: #b9c9ff;
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.1);
}

.chat-input button {
  padding: 11px 20px;
  font-size: 14.5px;
  font-family: inherit;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.chat-input button:hover { opacity: 0.9; }
.chat-input button:disabled { opacity: 0.5; cursor: default; }
.chat-input button.is-stop { background: #8a93a6; }

/* ===== 联系方式 ===== */
.section-contact {
  margin-top: 32px;
}

.contact-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.contact-chip {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid #d7e0ff;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.contact-chip:hover {
  background: #dde5ff;
  border-color: #c5d0ff;
}

/* ===== 页脚 ===== */
.footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
}

.footer p { margin: 4px 0; }
.footer-dim { font-size: 12px; color: var(--text-faint); }

/* ===== 手机适配 ===== */
@media (max-width: 899px) {
  .page { padding: 32px 16px 48px; max-width: 100%; }

  /* 双栏塌缩为单栏，清除桌面端的 grid-column 指派 */
  .content-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .section-about, .section-works, .section-chat {
    grid-column: unset;
    grid-row: unset;
  }

  /* 手机端：聊天区排到关于我前面 */
  .section-chat {
    order: -1;
    position: static;
    margin-top: 24px;
  }
  .section-about {
    margin-top: 0;
  }

  /* 作品排在 about 后面 */
  .section-works {
    margin-top: 20px;
  }

  /* 头像缩小 */
  .avatar { width: 72px; height: 72px; margin-bottom: 14px; }
  .avatar-text { font-size: 28px; }
  .name { font-size: 32px; }
  .tagline { font-size: 16px; }
  .hero-meta { margin-top: 20px; }

  /* 关于我卡片单列 */
  .info-grid { grid-template-columns: 1fr; gap: 10px; }

  /* 聊天区高度手机端收一点 */
  .chat-log { height: 320px; padding: 14px; }
  .msg { max-width: 86%; }
  .quick-questions { padding: 10px 14px 0; }
  .chat-input { padding: 12px 14px 14px; }
  .chat-input button { padding: 11px 16px; }
}