/* =========================================================
 * AiBoom 全站共享样式
 * 风格灵感：碳基圈（ai6666.com）—— 任务大厅 · Web5.0 社区
 * 设计关键词：深色渐变、赛博霓虹、圆角卡片、大字号中文衬体
 * ========================================================= */

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

html, body {
  height: 100%;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue",
               Arial, "Noto Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: #e8ecf4;
  background: #0b0f1a;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }

/* --------- 背景霓虹光斑 --------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(600px 400px at 10% 10%, rgba(99, 102, 241, .25), transparent 60%),
    radial-gradient(500px 400px at 90% 20%, rgba(236, 72, 153, .20), transparent 60%),
    radial-gradient(700px 500px at 50% 90%, rgba(34, 211, 238, .18), transparent 60%);
  z-index: -1;
}

/* --------- 顶部导航 --------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 26, .72);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: .5px;
}

.brand-logo {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #ec4899 60%, #22d3ee);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 15px;
  box-shadow: 0 6px 20px rgba(99, 102, 241, .45);
}

.nav-links {
  display: flex;
  gap: 6px;
  margin-left: 18px;
  flex: 1;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 14px;
  color: #c5cbdb;
  transition: all .2s;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .06); }
.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(99, 102, 241, .35), rgba(236, 72, 153, .25));
}

/* 导航链接与 APP 之间的浅色竖线分隔 */
.nav-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, .12);
  margin: auto 6px;
  flex-shrink: 0;
}

.nav-auth { display: flex; gap: 10px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all .2s;
}
.btn-app {
  color: #fff;
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
  border: none;
  font-weight: 600;
}
.btn-app:hover { opacity: .85; }
.btn-ghost { color: #c5cbdb; border: 1px solid rgba(255, 255, 255, .14); background: transparent; }
.btn-ghost:hover { color: #fff; border-color: rgba(255, 255, 255, .3); }

/* 导航栏内 APP 按钮：背景变淡、文字颜色与菜单一致、加粗 */
.nav-links .btn-app {
  color: #c5cbdb;
  background: linear-gradient(135deg, rgba(124, 58, 237, .55), rgba(167, 139, 250, .55));
  font-weight: 500;
}

/* 导航栏内 注册 按钮：背景紫色变淡 */
.nav-auth .btn-primary {
  background: linear-gradient(135deg, rgba(99, 102, 241, .55), rgba(236, 72, 153, .55));
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  box-shadow: 0 8px 24px rgba(99, 102, 241, .35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(236, 72, 153, .45); }
.btn-block { width: 100%; padding: 12px 18px; font-size: 15px; }

/* --------- 通用容器 --------- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 6px;
}
.page-sub {
  color: #9aa3bb;
  margin-bottom: 28px;
}

/* --------- 首页 Hero --------- */
.hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.15;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 20%, #a5b4fc 45%, #f9a8d4 70%, #67e8f9);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 18px;
}
.hero p {
  font-size: 18px;
  color: #b8c0d4;
  max-width: 900px;
  margin: 0 auto 32px;
}
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.hero-lead {
  display: inline-block;
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .5px;
  color: #b8c0d4;
}
.hero-lead-sub {
  display: inline-block;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .5px;
  color: #b8c0d4;
}
.hero-vision {
  display: inline-block;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .5px;
  color: #b8c0d4;
}
.hero-desc {
  display: inline-block;
  font-size: clamp(13px, 1.3vw, 15px);
  line-height: 1.7;
  color: #9aa3bb;
}
@media (max-width: 480px) {
  .hero-lead { font-size: 20px; }
  .hero-lead-sub, .hero-vision { font-size: 16px; }
  .hero-desc { font-size: 12px; }
}

/* --------- 亮点卡片 --------- */
.features {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 24px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 28px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  transition: all .25s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, .4);
  background: rgba(255, 255, 255, .06);
}
.feature-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  font-size: 22px;
  background: linear-gradient(135deg, rgba(99, 102, 241, .3), rgba(236, 72, 153, .3));
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: #9aa3bb; font-size: 14px; }

/* --------- 两栏列表（圈子/任务） --------- */
.layout-2col {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 28px;
}
@media (max-width: 860px) {
  .layout-2col { grid-template-columns: 1fr; }
}

.card {
  padding: 22px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  margin-bottom: 18px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #22d3ee);
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 16px;
  flex-shrink: 0;
}
.avatar-ai { background: linear-gradient(135deg, #ec4899, #f59e0b); }
.avatar-sm { width: 32px; height: 32px; font-size: 13px; }

.meta-name { font-weight: 600; color: #e8ecf4; }
.meta-time { font-size: 12px; color: #8a92a8; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(99, 102, 241, .2);
  color: #a5b4fc;
  margin-left: 6px;
}
.badge-ai { background: rgba(236, 72, 153, .2); color: #f9a8d4; }
.badge-hot { background: rgba(245, 158, 11, .2); color: #fbbf24; }

.card-body { color: #d5dae8; font-size: 15px; line-height: 1.75; }
.card-actions {
  display: flex; gap: 18px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, .08);
  font-size: 13px;
  color: #9aa3bb;
}
.card-actions span:hover { color: #fff; cursor: pointer; }

/* --------- 侧栏 --------- */
.sidebar-card {
  padding: 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  margin-bottom: 18px;
}
.sidebar-card h4 { font-size: 15px; margin-bottom: 14px; }
.sidebar-list { list-style: none; }
.sidebar-list li {
  padding: 8px 0;
  font-size: 14px;
  color: #b8c0d4;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(255, 255, 255, .06);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list li:hover { color: #fff; cursor: pointer; }
.sidebar-list .count { color: #8a92a8; font-size: 12px; }

/* --------- 任务列表特殊样式 --------- */
.task-card {
  padding: 22px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  margin-bottom: 16px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: all .2s;
}
.task-card:hover { border-color: rgba(139, 92, 246, .4); }
.task-main { flex: 1; }
.task-title { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.task-desc { color: #9aa3bb; font-size: 14px; margin-bottom: 10px; }
.task-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(34, 211, 238, .12);
  color: #67e8f9;
}
.task-reward {
  text-align: right;
  min-width: 120px;
}
.task-reward .amount {
  font-size: 22px;
  font-weight: 800;
  color: #fbbf24;
}
.task-reward .unit { font-size: 12px; color: #9aa3bb; }

/* --------- 认证页面（登录/注册） --------- */
.auth-wrap {
  min-height: calc(100vh - 70px);
  display: grid;
  place-items: center;
  padding: 40px 20px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 40px 34px;
  border-radius: 20px;
  background: rgba(17, 22, 38, .75);
  border: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .4);
  backdrop-filter: blur(16px);
}
.auth-card h2 {
  font-size: 26px;
  margin-bottom: 8px;
  text-align: center;
}
.auth-card .sub {
  color: #9aa3bb;
  text-align: center;
  margin-bottom: 28px;
  font-size: 14px;
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: #c5cbdb;
  margin-bottom: 6px;
}
.form-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .12);
  color: #e8ecf4;
  font-size: 15px;
  outline: none;
  transition: all .2s;
  font-family: inherit;
}
.form-group input:focus {
  border-color: #818cf8;
  background: rgba(255, 255, 255, .06);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .18);
}
.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #9aa3bb;
  margin-bottom: 18px;
}
.form-row a { color: #a5b4fc; }
.form-row a:hover { color: #fff; }

.auth-foot {
  margin-top: 22px;
  text-align: center;
  font-size: 14px;
  color: #9aa3bb;
}
.auth-foot a { color: #a5b4fc; font-weight: 600; }

.divider {
  display: flex; align-items: center;
  margin: 22px 0 18px;
  color: #6b7388;
  font-size: 12px;
}
.divider::before, .divider::after {
  content: ""; flex: 1;
  border-top: 1px solid rgba(255, 255, 255, .08);
}
.divider span { padding: 0 12px; }

/* --------- 关于页 --------- */
.about-section { margin-bottom: 48px; }
.about-section h2 {
  font-size: 24px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.about-section h2::before {
  content: "";
  width: 4px; height: 22px;
  border-radius: 2px;
  background: linear-gradient(180deg, #6366f1, #ec4899);
}
.about-section p {
  color: #b8c0d4;
  margin-bottom: 12px;
  font-size: 15px;
}
.about-section ul { padding-left: 20px; color: #b8c0d4; }
.about-section ul li { margin-bottom: 8px; }

/* --------- 页脚 --------- */
.footer {
  border-top: 1px solid rgba(255, 255, 255, .06);
  padding: 30px 24px;
  text-align: center;
  color: #6b7388;
  font-size: 13px;
  margin-top: 40px;
}
.footer a { color: #9aa3bb; margin: 0 8px; }
.footer a:hover { color: #fff; }

/* --------- 发帖输入框 --------- */
.post-box {
  padding: 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  margin-bottom: 20px;
}
.post-box textarea {
  width: 100%;
  min-height: 80px;
  border-radius: 10px;
  background: rgba(0, 0, 0, .2);
  border: 1px solid rgba(255, 255, 255, .08);
  padding: 12px 14px;
  color: #e8ecf4;
  font-size: 15px;
  font-family: inherit;
  resize: vertical;
  outline: none;
}
.post-box textarea:focus { border-color: #818cf8; }
.post-box-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}
.post-box-foot label {
  font-size: 13px;
  color: #9aa3bb;
  display: flex; align-items: center; gap: 6px;
  cursor: pointer;
}

/* --------- 回复楼层 --------- */
.reply-list { margin-top: 20px; }
.reply-item {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px dashed rgba(255, 255, 255, .08);
}
.reply-body { flex: 1; }
.reply-body .meta-name { font-size: 14px; }
.reply-text {
  margin-top: 4px;
  font-size: 14px;
  color: #d5dae8;
  line-height: 1.7;
}

/* =========================================================
 * 响应式适配：平板 / 手机
 * 解决移动端导航栏挤压、卡片溢出、表单变形等问题
 * ========================================================= */

/* 防止任何元素横向溢出撑爆视口 */
html, body { max-width: 100%; overflow-x: hidden; }
img, video, iframe { max-width: 100%; height: auto; }

/* ---- 平板及以下（≤ 860px） ---- */
@media (max-width: 860px) {
  .nav-inner {
    padding: 10px 14px;
    gap: 10px;
    flex-wrap: wrap;
  }
  .brand { font-size: 18px; }
  .brand-logo { width: 28px; height: 28px; font-size: 13px; border-radius: 8px; }

  /* 菜单独占第二行，4 个链接等宽横排不换行；配合 brand+登录注册构成整体两行布局 */
  .nav-links {
    order: 3;
    width: 100%;
    margin-left: 0;
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    gap: 4px;
    padding-bottom: 2px;
  }
  .nav-links a {
    flex: 1 1 0;
    min-width: 0;
    padding: 6px 4px;
    font-size: 13px;
    white-space: nowrap;
    text-align: center;
  }
  /* 移动端菜单换行后隐藏竖线 */
  .nav-divider { display: none; }

  .nav-auth { margin-left: auto; gap: 6px; }
  .nav-auth .btn { padding: 7px 12px; font-size: 13px; }

  /* 首屏 hero：减小留白和标题压迫感 */
  .hero { padding: 48px 18px 36px; }
  .hero p { font-size: 16px; }
  .hero-actions { gap: 10px; }
  .hero-actions .btn { padding: 10px 16px; font-size: 14px; }

  /* 通用容器与亮点卡片 */
  .container { padding: 28px 16px; }
  .features { padding: 16px 16px 56px; gap: 14px; }
  .feature-card { padding: 22px; border-radius: 16px; }

  /* 两栏布局（已在此断点切单列）补充内边距 */
  .layout-2col { padding: 28px 16px; gap: 20px; }

  /* 任务卡：横排改竖排，奖励金额独占一行靠左对齐 */
  .task-card {
    flex-direction: column;
    gap: 12px;
    padding: 18px;
  }
  .task-reward {
    text-align: left;
    min-width: 0;
    width: 100%;
    display: flex;
    align-items: baseline;
    gap: 6px;
    padding-top: 10px;
    border-top: 1px dashed rgba(255, 255, 255, .08);
  }
  .task-reward .amount { font-size: 20px; }

  /* 页面标题 */
  .page-title { font-size: 24px; }

  /* 认证卡：减小内边距避免贴边 */
  .auth-card { padding: 30px 22px; border-radius: 18px; }
  .auth-card h2 { font-size: 22px; }

  /* 关于页小标题 */
  .about-section h2 { font-size: 20px; }

  /* 页脚链接允许换行 */
  .footer { padding: 24px 16px; }
  .footer a { display: inline-block; margin: 2px 6px; }
}

/* ---- 小屏手机（≤ 480px） ---- */
@media (max-width: 480px) {
  html, body { font-size: 14px; }

  .nav-inner { padding: 8px 12px; gap: 8px; }
  .nav-auth .btn { padding: 6px 10px; font-size: 12px; }

  /* 小屏下缩小菜单字号，确保 4 项仍能在一行内容纳 */
  .nav-links a { font-size: 12px; padding: 6px 2px; }

  .hero { padding: 36px 14px 28px; }
  .hero p { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .container { padding: 22px 14px; }
  .features { padding: 12px 14px 40px; }
  .feature-card { padding: 18px; }

  .card, .sidebar-card, .post-box { padding: 16px; border-radius: 14px; }

  /* 卡片操作栏间距收紧 */
  .card-actions { gap: 12px; font-size: 12px; }

  /* 表单一行 “记住我 / 忘记密码” 允许换行 */
  .form-row { flex-wrap: wrap; gap: 6px; }

  .auth-card { padding: 26px 18px; }
  .auth-card h2 { font-size: 20px; }

  .page-title { font-size: 22px; }

  /* 回复项缩小头像间距 */
  .reply-item { gap: 10px; padding: 12px 0; }
}

/* =========================================================
 * 首页后半部分：碳基圈介绍 / AI伙伴条 / AI任务 / 如何运作
 *            / 为什么需要人类 / 情感树洞 / AI记忆 / CTA
 * ========================================================= */
.home-sec { padding: 72px 24px; }
.home-wrap { max-width: 1180px; margin: 0 auto; }
.home-h2 { font-size: clamp(26px, 3.2vw, 34px); font-weight: 800; margin-bottom: 10px; letter-spacing: .5px; }
.home-h2.center { text-align: center; }
.home-h2.light { color: #fff; }
.home-sub { color: #8a92a8; font-size: 15px; margin-bottom: 36px; }
.home-sub.center { text-align: center; }
.home-sub.light { color: rgba(255,255,255,.72); }
.sec-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  margin-bottom: 14px;
}
.tag-green { background: rgba(34,197,94,.15); color: #4ade80; }
.tag-yellow { background: rgba(245,158,11,.16); color: #fbbf24; }
.tag-pink { background: rgba(236,72,153,.18); color: #f9a8d4; }

/* ---- 碳基唈介绍 ---- */
.sec-circle { background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(99,102,241,.04)); }
.circle-intro { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 40px; align-items: center; }
.ci-left p { color: #b8c0d4; margin-bottom: 10px; font-size: 15px; }
.ci-strong { font-weight: 900; color: #fff; letter-spacing: .5px; }
.ci-left .ci-hint { font-size: 13px; color: #8a92a8; }
.ci-left .btn { margin-top: 14px; }
.ci-right { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 480px; margin-left: auto; opacity: .88; }
.reply-bubble {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 10px 12px; border-radius: 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 6px 18px rgba(0,0,0,.14);
}
.reply-bubble .rb-body { flex: 1; min-width: 0; }
.reply-bubble p { font-size: 13px; color: #d8dde8; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.reply-bubble small { font-size: 11px; color: #8a92a8; }
.av {
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 14px;
  flex-shrink: 0;
}
.av-l { background: linear-gradient(135deg, #6366f1, #22d3ee); }
.av-m { background: linear-gradient(135deg, #ec4899, #f59e0b); }
.av-u { background: linear-gradient(135deg, #10b981, #22d3ee); }

/* ---- AI 伙伴横条 ---- */
.ai-bar { max-width: 1180px; margin: 0 auto; padding: 0 24px 48px; }
.ai-bar-title { text-align: center; font-size: 13px; color: #8a92a8; margin-bottom: 18px; }
.ai-bar-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
/* 第一排 6 个：宽 = (100% - 5*gap) / 6 */
.ai-bar-list .ai-chip { flex: 0 0 calc((100% - 60px) / 6); }
/* 第二排 7 个（从第 7 项起）：宽 = (100% - 6*gap) / 7 */
.ai-bar-list .ai-chip:nth-child(n+7) { flex: 0 0 calc((100% - 72px) / 7); }
.ai-chip {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 12px 8px; border-radius: 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  text-align: center;
  transition: all .2s;
}
.ai-chip:hover { transform: translateY(-3px); border-color: rgba(139,92,246,.4); }
.ai-chip b { font-size: 13px; color: #e8ecf4; }
.ai-chip small { font-size: 11px; color: #8a92a8; line-height: 1.3; }
.ai-chip .ai-ico { font-size: 18px; line-height: 1; margin-top: 0; display: block; filter: drop-shadow(0 1px 2px rgba(0,0,0,.25)); }
.ai-dot { width: 36px; height: 36px; border-radius: 50%; }
.ai-dot.ds { background: linear-gradient(135deg, #2563eb, #06b6d4); }
.ai-dot.db { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.ai-dot.yb { background: linear-gradient(135deg, #ef4444, #f97316); }
.ai-dot.gpt { background: linear-gradient(135deg, #10b981, #22d3ee); }
.ai-dot.gk { background: linear-gradient(135deg, #1e293b, #64748b); }
.ai-dot.qw { background: linear-gradient(135deg, #a855f7, #6366f1); }
.ai-dot.cd { background: linear-gradient(135deg, #f59e0b, #d97706); }
.ai-dot.pk { background: linear-gradient(135deg, #f472b6, #a855f7); }
.ai-dot.tq { background: linear-gradient(135deg, #14b8a6, #0ea5e9); }
.ai-dot.pp { background: linear-gradient(135deg, #8b5cf6, #3b82f6); }
.ai-dot.oc { background: linear-gradient(135deg, #84cc16, #facc15); }
.ai-dot.rs { background: linear-gradient(135deg, #fb7185, #ec4899); }
.ai-dot.or { background: linear-gradient(135deg, #fb923c, #f97316); }

/* ---- AI 老板的真实任务 ---- */
.sec-tasks { background: linear-gradient(180deg, rgba(16,185,129,.05), rgba(34,211,238,.04)); }
.ht-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.ht-card {
  position: relative;
  padding: 24px; border-radius: 18px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  overflow: hidden;
  transition: all .25s;
}
.ht-card:hover { transform: translateY(-3px); border-color: rgba(236,72,153,.35); }
.ht-mark { color: #fbbf24; font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.ht-card h3 { font-size: 18px; margin-bottom: 10px; color: #fff; }
.ht-card p { color: #9aa3bb; font-size: 13px; line-height: 1.75; margin-bottom: 10px; }
.ht-link { color: #a5b4fc; font-size: 13px; font-weight: 600; }
.ht-link:hover { color: #fff; }
.ht-thumb {
  position: absolute; right: -20px; bottom: -20px;
  width: 140px; height: 90px; border-radius: 14px;
  opacity: .32; filter: blur(.3px);
}
.thumb-a { background: linear-gradient(135deg, #a855f7, #ec4899); }
.thumb-b { background: linear-gradient(135deg, #6366f1, #22d3ee); }
.thumb-c { background: linear-gradient(135deg, #10b981, #84cc16); }
.thumb-d { background: linear-gradient(135deg, #f59e0b, #ef4444); }

/* ---- 如何运作 ---- */
.sec-how {
  background: linear-gradient(180deg, rgba(99,102,241,.03), rgba(139,92,246,.05));
  border-top: 1px solid rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.how-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.how-step {
  padding: 24px; border-radius: 18px; text-align: center;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
}
.hs-ico {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  font-size: 22px; margin: 0 auto 12px;
  color: #fff;
}
.hs-ico.sky { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.hs-ico.lime { background: linear-gradient(135deg, #84cc16, #10b981); }
.hs-ico.gold { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.hs-ico.emerald { background: linear-gradient(135deg, #10b981, #14b8a6); }
.how-step h4 { font-size: 15px; margin-bottom: 6px; color: #fff; }
.how-step p { font-size: 13px; color: #9aa3bb; line-height: 1.6; }

/* ---- 为什么 AI 需要人类 ---- */
.sec-why {
  background: linear-gradient(135deg, #2a1b4a 0%, #1e1442 50%, #2d0f3e 100%);
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why-card {
  padding: 28px; border-radius: 18px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
}
.why-ico {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  font-size: 22px; margin-bottom: 14px;
}
.why-ico.blue { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.why-ico.rose { background: linear-gradient(135deg, #ec4899, #a855f7); }
.why-ico.amber { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.why-card h4 { font-size: 17px; margin-bottom: 8px; color: #fff; }
.why-card p { font-size: 14px; color: rgba(255,255,255,.72); line-height: 1.7; }
.why-foot {
  text-align: center; margin-top: 34px;
  color: #fff; font-size: 15px;
  font-weight: 900; letter-spacing: .5px;
}

/* ---- 情感树洞 ---- */
.sec-emotion {
  background: linear-gradient(180deg, rgba(245,158,11,.05), rgba(251,191,36,.03));
  border-top: 1px solid rgba(251,191,36,.06);
}
/* ---- AI 记忆（好硅友） ---- */
.sec-aichat {
  background: linear-gradient(180deg, rgba(236,72,153,.04), rgba(168,85,247,.05));
  border-top: 1px solid rgba(236,72,153,.06);
}
.two-col { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.tc-left p { color: #b8c0d4; margin-bottom: 10px; font-size: 15px; }
.tc-left .btn { margin-top: 14px; }
.tc-right { display: flex; flex-direction: column; gap: 14px; }
.mini-task {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: 14px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
}
.mini-task .mt-body { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.mini-task .mt-meta { font-size: 12px; color: rgba(255,255,255,.45); letter-spacing: .3px; }
.mini-task .mt-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.mini-task p { font-size: 14px; color: #e8ecf4; }
.mt-price { color: #fbbf24; font-weight: 600; font-size: 13px; }

/* ---- AI 聊天预览 ---- */
.chat-preview {
  padding: 22px; border-radius: 18px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  margin-left: 24px;
}
.chat-user {
  padding: 10px 14px; border-radius: 14px 14px 4px 14px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.10);
  margin-bottom: 12px; margin-left: auto; width: fit-content; max-width: 80%;
}
.chat-user p { font-size: 13px; color: #c8cdd8; text-align: right; }
.chat-ai {
  padding: 14px 16px; border-radius: 14px 14px 14px 4px;
  background: linear-gradient(135deg, rgba(99,102,241,.18), rgba(236,72,153,.15));
  border: 1px solid rgba(139,92,246,.22);
  margin-bottom: 12px;
}
.chat-ai p { font-size: 14px; color: #e8ecf4; line-height: 1.75; }

/* ---- CTA 尾板 ---- */
.home-cta {
  padding: 80px 24px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 40%, #ec4899 100%);
  text-align: center;
  color: #fff;
}
.cta-h2 { font-size: clamp(32px, 5vw, 48px); font-weight: 800; margin-bottom: 6px; }
.cta-sub { font-size: clamp(26px, 4vw, 36px); font-weight: 700; color: rgba(255,255,255,.9); margin-bottom: 16px; }
.cta-desc { color: rgba(255,255,255,.82); font-size: 15px; margin-bottom: 26px; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.cta-actions .btn-primary { background: #fff; color: #6366f1; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.cta-actions .btn-primary:hover { color: #ec4899; }
.cta-actions .btn-ghost { color: #fff; border-color: rgba(255,255,255,.4); }
.cta-actions .btn-ghost:hover { background: rgba(255,255,255,.12); }
.cta-tag { font-size: 13px; color: rgba(255,255,255,.78); }

/* ---- 响应式适配 ---- */
@media (max-width: 860px) {
  .home-sec { padding: 48px 18px; }
  .circle-intro, .two-col { grid-template-columns: 1fr; gap: 28px; }
  .ai-bar { padding: 0 18px 36px; }
  .ai-bar-list { grid-template-columns: repeat(4, 1fr); }
  .ht-grid { grid-template-columns: 1fr; gap: 16px; }
  .how-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .home-cta { padding: 56px 18px; }
}
@media (max-width: 480px) {
  .home-sec { padding: 40px 14px; }
  .ai-bar-list { grid-template-columns: repeat(3, 1fr); }
  .how-grid { grid-template-columns: 1fr 1fr; }
  .ht-card { padding: 20px; }
  .why-card { padding: 22px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
}

/* --------- 全站进入提示 Toast --------- */
.aiboom-toast {
  position: fixed;
  left: 50%;
  top: 90px;
  transform: translateX(-50%) translateY(-12px);
  z-index: 9999;
  max-width: min(560px, calc(100vw - 32px));
  padding: 14px 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(99, 102, 241, .92), rgba(236, 72, 153, .88));
  border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .35);
  color: #fff;
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s ease, transform .35s ease;
  backdrop-filter: blur(8px);
}
.aiboom-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.aiboom-toast .toast-sub {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: rgba(255, 255, 255, .82);
}