/* =========================================================
   HeroHub 样式表
   风格：Dota 2 暗黑风格 + Apple 简洁设计
   手机优先（Mobile First），从小屏开始写，再用媒体查询放大
   ========================================================= */

/* ---------- 基础变量（颜色 / 圆角 / 阴影统一在这里管理） ---------- */
:root {
  --bg: #0d1117;              /* 页面背景 */
  --card: #161b22;            /* 卡片背景 */
  --card-hover: #1c2330;      /* 卡片悬停背景 */
  --border: #2a3140;          /* 卡片边框 */
  --text: #f5f6f7;            /* 主文字 */
  --text-dim: #9aa4b2;        /* 次要文字 */
  --red: #e0393a;             /* Dota 红：强调色 */
  --red-dim: #7a2223;         /* 深红：暗部/边框 */
  --gold: #c9a227;            /* 点缀金色，用于稀有/精华内容 */

  /* 三种属性颜色，对应 Dota 2 本身的属性配色，用于头像光环 */
  --str: #e0393a;   /* 力量：红 */
  --agi: #3fcf7f;   /* 敏捷：绿 */
  --int: #4aa3ff;   /* 智力：蓝 */
  --uni: #c9a227;   /* 全才：金 */

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 720px; /* 内容最大宽度，桌面上居中显示，模拟手机 App 感 */
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* 减少动态效果（无障碍：尊重用户的“减少动态”系统设置） */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.page {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 16px 60px;
}

/* ---------- 顶部品牌区 ---------- */
.brand {
  text-align: center;
  padding: 28px 0 8px;
}
.brand__logo {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #ffd7d7 60%, var(--red) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand__logo span { color: var(--red); -webkit-text-fill-color: var(--red); }
.brand__tag {
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.5;
}
.brand__tag b { color: var(--text); font-weight: 600; }

/* ---------- 搜索框 ---------- */
.search {
  position: relative;
  margin: 20px 0 10px;
}
.search input {
  width: 100%;
  padding: 16px 18px;
  font-size: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.search input::placeholder { color: var(--text-dim); }
.search input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(224, 57, 58, 0.25);
}
.search__icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.6;
  pointer-events: none;
}

/* 实时搜索结果下拉列表 */
.search__results {
  margin-top: 8px;
  display: none;
  flex-direction: column;
  gap: 6px;
}
.search__results.is-open { display: flex; }
.search__result {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .15s ease, transform .15s ease;
  animation: fadeSlideIn .25s ease both;
}
.search__result:hover { background: var(--card-hover); transform: translateX(2px); }
.search__result-name { font-weight: 600; }
.search__result-role { font-size: 12px; color: var(--text-dim); }
.search__empty {
  padding: 12px;
  color: var(--text-dim);
  font-size: 14px;
  text-align: center;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { background: var(--card-hover); border-color: var(--red-dim); }
.btn:active { transform: scale(0.97); }
.btn--primary {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}
.btn--primary:hover { background: #c92f30; }
.btn--ghost { background: transparent; }

.random-row { margin: 14px 0 26px; }
.random-row.two-col { display: grid; grid-template-columns: 1.3fr 1fr; gap: 10px; }
.random-row.two-col .btn { width: 100%; }

.see-all-row { text-align: center; margin: 16px 0 4px; }
.see-all-link {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--red);
  padding: 8px 4px;
}
.see-all-link:hover { text-decoration: underline; }

/* 属性筛选 chip（All Heroes 页面用） */
.attr-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 20px;
}
.attr-chip {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  transition: all .15s ease;
}
.attr-chip:hover { border-color: var(--red-dim); color: var(--text); }
.attr-chip.is-active { background: var(--red); border-color: var(--red); color: #fff; }

/* ---------- 分区标题 ---------- */
.section-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 28px 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- 英雄卡片网格（首页） ---------- */
.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (min-width: 480px) {
  .hero-grid { grid-template-columns: repeat(3, 1fr); }
}

.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
  animation: fadeSlideIn .35s ease both;
}
.hero-card:hover {
  transform: translateY(-3px);
  border-color: var(--red-dim);
  background: var(--card-hover);
}
.hero-card__name { margin-top: 10px; font-weight: 700; font-size: 15px; }
.hero-card__meta {
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-dim);
}

/* ---------- 头像（属性光环圆环，css 生成，不依赖外部图片） ---------- */
.avatar {
  --ring: var(--gold);
  position: relative;
  width: 64px;
  height: 64px;
  margin: 0 auto;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-weight: 800;
  font-size: 22px;
  color: #fff;
  background: #0f141b;
  box-shadow: 0 0 0 3px var(--ring), 0 0 18px -4px var(--ring);
}
.avatar--str { --ring: var(--str); }
.avatar--agi { --ring: var(--agi); }
.avatar--int { --ring: var(--int); }
.avatar--uni { --ring: var(--uni); }
.avatar--lg { width: 92px; height: 92px; font-size: 32px; }

/* 英雄头像图片：填满圆形容器；若加载失败，脚本会隐藏图片并显示下面的字母回退 */
.avatar__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%; /* Steam 头像通常头部偏上，稍微上移取景 */
  display: block;
}
.avatar__fallback {
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

/* ---------- 通用卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}

/* ---------- Hero Header (详情页顶部) ---------- */
.hero-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 4px 8px;
}
.hero-header__name { font-size: 24px; font-weight: 800; }
.hero-header__attr { font-size: 13px; color: var(--text-dim); margin-top: 2px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 100px;
  background: rgba(224,57,58,0.12);
  color: #ff8f8f;
  border: 1px solid rgba(224,57,58,0.35);
}

/* ---------- 3 分钟速览 ---------- */
.brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.brief-item .brief-item__label {
  font-size: 11px;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.brief-item p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--text); }
.brief-summary {
  margin-top: 6px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-size: 15px;
  font-weight: 600;
  color: var(--red);
}

/* ---------- 技能卡片（可展开） ---------- */
.skill {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: #121722;
}
.skill__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px;
  cursor: pointer;
}
.skill__name { font-weight: 700; font-size: 15px; }
.skill__type { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.skill__chevron { transition: transform .2s ease; color: var(--text-dim); }
.skill.is-open .skill__chevron { transform: rotate(180deg); }
.skill__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
  padding: 0 14px;
}
.skill.is-open .skill__body { padding: 0 14px 14px; }
.skill__desc { font-size: 13.5px; line-height: 1.6; color: var(--text-dim); margin: 0 0 8px; }
.skill__tips { margin: 0; padding-left: 18px; font-size: 13.5px; line-height: 1.7; }
.skill__tips li { margin-bottom: 4px; }

/* ---------- 技能升级顺序（视觉箭头） ---------- */
.order-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.order-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 52px;
}
.order-step__lv { font-size: 10px; color: var(--text-dim); }
.order-step__name {
  margin-top: 4px;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 8px;
  border-radius: 8px;
  background: rgba(224,57,58,0.14);
  border: 1px solid rgba(224,57,58,0.3);
  white-space: nowrap;
}
.order-arrow { color: var(--text-dim); opacity: 0.6; }

/* ---------- How To Play 阶段 ---------- */
.phase-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}
.phase-tab {
  flex: 1;
  text-align: center;
  padding: 10px 6px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  transition: all .15s ease;
}
.phase-tab.is-active {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}
.phase-panel { display: none; }
.phase-panel.is-active { display: block; animation: fadeSlideIn .2s ease both; }
.phase-panel ul { margin: 0; padding-left: 18px; font-size: 14px; line-height: 1.7; }
.phase-panel li { margin-bottom: 6px; }

/* ---------- 出装 ---------- */
.item-group { margin-bottom: 14px; }
.item-group__label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 8px;
}
.item-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.item-pill {
  font-size: 13px;
  padding: 7px 12px;
  border-radius: 100px;
  background: #121722;
  border: 1px solid var(--border);
}

/* ---------- 连招流程 ---------- */
.combo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.combo-step {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(224,57,58,0.18), rgba(224,57,58,0.05));
  border: 1px solid rgba(224,57,58,0.35);
  font-size: 13px;
  font-weight: 600;
}
.combo-arrow { color: var(--red); font-weight: 700; }

/* ---------- 常见错误 ---------- */
.mistake-list { list-style: none; margin: 0; padding: 0; }
.mistake-list li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  line-height: 1.55;
}
.mistake-list li:last-child { border-bottom: none; }
.mistake-x { color: var(--red); flex-shrink: 0; }

/* ---------- YouTube 分类 ---------- */
.video-group { margin-bottom: 18px; }
.video-group__label {
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 8px;
}
.video-frame-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
}
.video-frame-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- 相关英雄 ---------- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 6px;
  text-align: center;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}
.related-card:hover { transform: translateY(-2px); background: var(--card-hover); }
.related-card__name { margin-top: 6px; font-size: 12px; font-weight: 600; }

/* ---------- 顶部返回条 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-dim);
  padding: 8px 4px;
}
.back-link:hover { color: var(--text); }

/* ---------- 空状态 / 加载 ---------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}

/* ---------- 动画 ---------- */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeSlideIn .3s ease both; }

/* ---------- 页脚 ---------- */
.footer-note {
  text-align: center;
  margin-top: 40px;
  font-size: 12px;
  color: var(--text-dim);
  opacity: .7;
}

/* ---------- 键盘可访问性：清晰的焦点样式 ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
.hero-card:focus-visible,
.related-card:focus-visible,
.skill__head:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}