/* ==========================================================================
   名爵机器人官网 内页骨架：对话界面式
   Hero 左文右图 + 以聊天气泡组织的正文 + 转人工流程
   ========================================================================== */

:root {
  --im-bg: #f7f9ff;
  --im-panel: #ffffff;
  --im-indigo: #4f46e5;
  --im-indigo-dk: #312e81;
  --im-indigo-lt: #eef2ff;
  --im-ink: #1b2340;
  --im-muted: #66718c;
  --im-line: #e3e9f7;
}

body.im-page { background: var(--im-bg); color: var(--im-ink); }

.im-page .brand-mark { background: linear-gradient(140deg, #818cf8, #4338ca); box-shadow: 0 6px 16px rgba(79, 70, 229, .28); }
.im-page .brand-text em { color: var(--im-indigo); }
.im-page .site-nav a.is-active { color: var(--im-indigo); background: rgba(79, 70, 229, .09); }
.im-page .btn-login { background: linear-gradient(135deg, #818cf8, #4338ca); box-shadow: 0 8px 20px rgba(79, 70, 229, .26); }

/* ---------------- Hero ---------------- */
.im-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 80px;
  background:
    radial-gradient(700px 420px at 78% 8%, rgba(129, 140, 248, .2), transparent 66%),
    linear-gradient(180deg, #ffffff, var(--im-bg));
  border-bottom: 1px solid var(--im-line);
}

.im-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(79, 70, 229, .13) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at 26% 24%, #000, transparent 68%);
  -webkit-mask-image: radial-gradient(ellipse at 26% 24%, #000, transparent 68%);
  pointer-events: none;
}

.im-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: .98fr 1.02fr;
  gap: 48px;
  align-items: center;
}

.im-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--im-line);
  box-shadow: var(--shadow-s);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--im-indigo);
}

.im-tag i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, .16);
}

.im-hero h1 {
  margin: 22px 0 16px;
  font-size: clamp(31px, 4.2vw, 48px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -.7px;
  text-wrap: balance;
}

.im-hero h1 span { color: var(--im-indigo); }

.im-hero .lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--im-muted);
  max-width: 520px;
}

.im-hero .lead strong { color: var(--im-ink); }

.im-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 28px; }

.im-actions .btn-primary {
  background: linear-gradient(135deg, #818cf8, #4338ca);
  color: #fff;
  box-shadow: 0 16px 34px rgba(79, 70, 229, .3);
}

.im-actions .btn-room {
  background: #fff;
  border: 1px solid var(--im-line);
  color: var(--im-indigo-dk);
}

.im-actions .btn-room b { color: var(--im-indigo); letter-spacing: 1.5px; }

.im-visual img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 30px 60px rgba(49, 46, 129, .16);
}

/* ---------------- 对话式正文 ---------------- */
.im-section { padding: 78px 0; }

.im-head { max-width: 700px; margin: 0 auto 38px; text-align: center; }

.im-head .k { font-size: 12px; font-weight: 800; letter-spacing: 3px; color: var(--im-indigo); }
.im-head h2 { margin: 12px 0 10px; font-size: clamp(24px, 3.1vw, 36px); font-weight: 900; line-height: 1.3; text-wrap: balance; }
.im-head p { font-size: 15.5px; color: var(--im-muted); }

.thread {
  max-width: 860px;
  margin-inline: auto;
  display: grid;
  gap: 22px;
}

.turn {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.turn .av {
  flex: none;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: var(--im-indigo-lt);
  color: var(--im-indigo);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.turn.user { flex-direction: row-reverse; }
.turn.user .av { background: var(--im-indigo); color: #fff; }

.bubble {
  max-width: 78%;
  padding: 20px 24px;
  border-radius: 18px;
  border-top-left-radius: 6px;
  background: #fff;
  border: 1px solid var(--im-line);
  box-shadow: 0 2px 8px rgba(27, 35, 64, .04);
}

.turn.user .bubble {
  border-top-left-radius: 18px;
  border-top-right-radius: 6px;
  background: var(--im-indigo);
  border-color: transparent;
  color: #eef2ff;
}

.bubble h3 { font-size: 16.5px; font-weight: 800; margin-bottom: 10px; }
.turn.user .bubble h3 { color: #fff; }

.bubble p { font-size: 14.5px; line-height: 1.85; color: var(--im-muted); }
.bubble p + p { margin-top: 8px; }
.turn.user .bubble p { color: #c7d2fe; }

.bubble ul { margin-top: 12px; display: grid; gap: 8px; }

.bubble li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--im-muted);
}

.bubble li::before {
  content: "";
  position: absolute;
  left: 2px; top: 9px;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--im-indigo);
  opacity: .5;
}

.turn.user .bubble li { color: #c7d2fe; }
.turn.user .bubble li::before { background: #c7d2fe; opacity: .7; }

.bubble a { color: var(--im-indigo); font-weight: 600; border-bottom: 1px solid rgba(79, 70, 229, .3); }

/* 房间卡（嵌在气泡里） */
.room-inline {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  margin-top: 14px;
  padding: 16px 18px;
  border-radius: 12px;
  background: var(--im-indigo-lt);
}

.room-inline .no {
  font-family: Georgia, serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--im-indigo);
  letter-spacing: 1px;
}

.room-inline .st { font-size: 12.5px; color: #15803d; margin-top: 2px; }

.room-inline .go {
  padding: 9px 18px;
  border-radius: 9px;
  background: var(--im-indigo);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

/* ---------------- 转人工 ---------------- */
.handover {
  max-width: 900px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--im-line);
  border-radius: 18px;
  overflow: hidden;
  background: #fff;
}

.handover div { padding: 30px 26px; border-right: 1px solid var(--im-line); }
.handover div:last-child { border-right: 0; }

.handover .n {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--im-indigo);
}

.handover h3 { margin: 12px 0 7px; font-size: 16px; font-weight: 800; }
.handover p { font-size: 13.5px; line-height: 1.8; color: var(--im-muted); }

/* ---------------- 提示 ---------------- */
.im-note {
  max-width: 900px;
  margin: 28px auto 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 26px 28px;
  border-radius: 16px;
  border: 1px solid #fde68a;
  background: #fffbeb;
}

.im-note .i {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: #fef3c7;
  color: #b45309;
  font-weight: 900;
}

.im-note h3 { font-size: 15.5px; font-weight: 800; color: #78350f; margin-bottom: 6px; }
.im-note p { font-size: 13.5px; line-height: 1.85; color: #92400e; }
.im-note a { color: #b45309; font-weight: 700; }

/* ---------------- 相关 ---------------- */
.im-related {
  max-width: 900px;
  margin: 26px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.im-related a {
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--im-line);
  background: #fff;
  transition: border-color .2s, transform .2s;
}

.im-related a:hover { border-color: #c7d2fe; transform: translateY(-3px); }
.im-related strong { display: block; font-size: 14.5px; margin-bottom: 4px; }
.im-related span { font-size: 12.5px; color: var(--im-muted); }

/* 入场 */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .7s, transform .7s; }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1000px) {
  .im-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .im-visual { order: -1; }
  .handover { grid-template-columns: 1fr; }
  .handover div { border-right: 0; border-bottom: 1px solid var(--im-line); }
  .handover div:last-child { border-bottom: 0; }
  .im-related { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .im-hero { padding: 48px 0 58px; }
  .im-hero h1 { font-size: 28px; }
  .im-actions .btn { width: 100%; }
  .im-section { padding: 58px 0; }
  .bubble { max-width: 100%; padding: 16px 18px; }
  .turn .av { width: 34px; height: 34px; border-radius: 11px; }
  .room-inline { grid-template-columns: 1fr; }
  .room-inline .go { text-align: center; }
  .im-note { grid-template-columns: 1fr; padding: 20px; }
}