:root{
  /* 背景 */
  --bg:          #f0f4ff;
  --bg-dot:      radial-gradient(circle, #c7d4f8 1px, transparent 1px);

  /* Header 渐变 */
  --header-from: #1e293b;
  --header-to:   #334155;
  --header-mid:  #475569;

  /* 卡片 */
  --card-bg:     #ffffff;
  --card-bd:     rgba(79,127,255,0.12);
  --card-bd-h:   rgba(79,127,255,0.45);

  /* 阴影 */
  --shadow:      0 2px 12px rgba(79,127,255,0.08);
  --shadow-h:    0 12px 40px rgba(79,127,255,0.22);
  --shadow-lg:   0 20px 60px rgba(79,127,255,0.3);

  /* 文字 */
  --text:        #1e293b;
  --text-sub:    #64748b;
  --text-muted:  #94a3b8;

  /* 圆角 */
  --radius:      20px;
  --radius-sm:   12px;
  --radius-xs:   8px;

  /* 聚焦 */
  --focus-ring:  0 0 0 3px rgba(79,127,255,0.35);

  /* 侧边栏 */
  --sidebar-w:   240px;
  --sidebar-bg:  #ffffff;
  --sidebar-bd:  rgba(79,127,255,0.1);

  /* 搜索框 */
  --search-bg:   rgba(255,255,255,0.2);
  --search-bd:   rgba(255,255,255,0.35);
  --search-focus:rgba(255,255,255,0.5);
}

/* ── 重置 ── */
*, *::before, *::after{ box-sizing:border-box; margin:0; padding:0; }

html{ -webkit-text-size-adjust:100%; }

body{
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,
               "PingFang SC","Microsoft YaHei",Arial,sans-serif;
  background-color: var(--bg);
  background-image: var(--bg-dot);
  background-size: 24px 24px;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── 布局 ── */
.app-layout{
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── 侧边栏 ── */
.sidebar{
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-bd);
  padding: 28px 0;
  position: sticky;
  top: 0;
  max-height: 100vh;
  max-height: 100dvh;
  transition: transform .35s cubic-bezier(.4,0,.2,1);
  z-index: 15;
  overflow: visible;
}

.sidebar-title{
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .1em;
  padding: 0 20px 14px;
  border-bottom: 1px solid var(--sidebar-bd);
  margin-bottom: 10px;
}

.sidebar-nav{
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  max-height: calc(100vh - 80px);
  max-height: calc(100dvh - 80px);
}

.sidebar-item{
  display: flex;
  align-items: center;
  width: 100%;
  padding: 11px 20px;
  font-size: 14px;
  color: var(--text);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
  border-radius: 0;
  font-family: inherit;
  position: relative;
  gap: 8px;
}

.sidebar-item:hover{
  background: linear-gradient(90deg, rgba(79,127,255,0.08) 0%, transparent 100%);
}

.sidebar-item.active{
  color: var(--header-mid);
  font-weight: 600;
  background: linear-gradient(90deg, rgba(79,127,255,0.12) 0%, transparent 100%);
}

.sidebar-item.active::before{
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: linear-gradient(180deg, var(--header-from), var(--header-to));
  border-radius: 0 4px 4px 0;
}

.sidebar-count{
  margin-left: auto;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 99px;
  font-weight: 500;
}

.sidebar-arrow{
  font-size: 9px;
  color: var(--text-muted);
  transition: transform .2s ease;
}

.sidebar-item.active .sidebar-arrow{
  transform: rotate(90deg);
  color: var(--header-mid);
}

.sidebar-child{
  padding-left: 40px;
  font-size: 13px;
}

.sidebar-child::before{
  content: '';
  position: absolute;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60%;
  background: var(--sidebar-bd);
}

/* ── 移动端 toggle ── */
.sidebar-toggle{
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 40;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--search-bd);
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(102,126,234,0.4);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: transform .2s ease, box-shadow .2s ease;
}

.sidebar-toggle:active{
  transform: scale(0.92);
}

.sidebar-overlay{
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 29;
  opacity: 0;
  transition: opacity .35s ease;
}

.sidebar-overlay.open{
  opacity: 1;
}

/* ── Header ── */
.header{
  background: linear-gradient(135deg, var(--header-from) 0%, var(--header-mid) 50%, var(--header-to) 100%);
  padding: max(40px, calc(env(safe-area-inset-top,0px) + 24px))
           max(32px, env(safe-area-inset-right,0px))
           24px
           max(32px, env(safe-area-inset-left,0px));
  position: sticky;
  top: 0;
  z-index: 20;
  box-shadow: 0 4px 24px rgba(102,126,234,0.35);
}

.header-content{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.header-brand{
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-icon{
  font-size: 32px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.15));
}

.header-text{ display: flex; flex-direction: column; }

.header-title{
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: .03em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
  line-height: 1.2;
}

.header-subtitle{
  font-size: .75rem;
  color: rgba(255,255,255,0.8);
  margin-top: 3px;
  letter-spacing: .05em;
}

.header-badge{
  font-size: .72rem;
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 99px;
  padding: 4px 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── 搜索框 ── */
.header-search{
  position: relative;
  flex: 1;
  max-width: 380px;
}

.search-input{
  width: 100%;
  padding: 12px 44px 12px 44px;
  font-size: 14px;
  font-family: inherit;
  color: #fff;
  background: var(--search-bg);
  border: 1.5px solid var(--search-bd);
  border-radius: 99px;
  outline: none;
  transition: all .3s ease;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.search-input::placeholder{ color: rgba(255,255,255,0.65); }

.search-input:focus{
  background: var(--search-focus);
  border-color: rgba(255,255,255,0.6);
  box-shadow: 0 0 0 4px rgba(255,255,255,0.2), 0 4px 20px rgba(0,0,0,0.15);
}

.search-icon{
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  opacity: .8;
  pointer-events: none;
}

/* ── 主区域 ── */
.page-main{
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.container{
  max-width: 1200px;
  margin: auto;
  padding: 32px
           max(28px, env(safe-area-inset-left,0px))
           56px
           max(28px, env(safe-area-inset-right,0px));
}

.container.sub-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

/* ── 卡片 ── */
.card{
  position: relative;
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--card-bd);
  border-radius: var(--radius);
  padding: 28px 18px 22px;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .25s cubic-bezier(.4,0,.2,1),
              box-shadow .25s ease,
              border-color .25s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* 顶部彩色条 */
.card::before{
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--stripe);
  transition: height .25s ease;
}

/* 玻璃微光 */
.card::after{
  content: '';
  position: absolute;
  top: 4px; left: 0; right: 0;
  height: 40%;
  background: linear-gradient(180deg, rgba(255,255,255,0.5) 0%, transparent 100%);
  pointer-events: none;
}

@media (prefers-reduced-motion:reduce){
  .card, .card::before, .card::after, .icon{ transition-duration: .01ms !important; }
}

@media (hover:hover) and (pointer:fine){
  .card:hover{
    transform: translateY(-6px);
    box-shadow: var(--shadow-h);
    border-color: var(--card-bd-h);
  }
  .card:hover::before{ height: 5px; }
  .card:hover .icon{ transform: scale(1.1); }
}

@media (prefers-reduced-motion:no-preference){
  .card:active{ transform: scale(0.97); }
}

.card:focus{ outline: none; }
.card:focus-visible{ box-shadow: var(--focus-ring); border-color: var(--header-mid); }

/* ── 图标 ── */
.icon{
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  line-height: 1;
  background: var(--stripe-soft);
  border: 2px solid var(--stripe-bd);
  transition: transform .25s cubic-bezier(.4,0,.2,1);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

/* favicon 图片 */
.icon-img{
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 4px;
}

/* favicon 加载失败时的 emoji 回退 */
.icon-fallback{
  font-size: 26px;
  line-height: 1;
}

/* ── 文字 ── */
.service-group{
  margin-bottom: 40px;
  display: block;
}

.group-title{
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--header-from), var(--header-to)) 1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.group-title::before{
  content: '';
  width: 5px;
  height: 20px;
  background: linear-gradient(180deg, var(--header-from), var(--header-to));
  border-radius: 3px;
}

.group-subtitle{
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  margin: 20px 0 14px;
  padding-left: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.group-subtitle::before{
  content: '›';
  color: var(--header-mid);
  font-weight: 700;
}

.group-cards{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.card-title{
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-top: 16px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  position: relative;
  z-index: 1;
}

.card-desc{
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 6px;
  line-height: 1.5;
  word-break: break-word;
  position: relative;
  z-index: 1;
}

/* ── 页脚 ── */
.site-footer{
  text-align: center;
  padding: 18px
           max(16px, env(safe-area-inset-left,0px))
           max(24px, calc(16px + env(safe-area-inset-bottom,0px)))
           max(16px, env(safe-area-inset-right,0px));
  font-size: 12px;
  color: var(--text-muted);
}

/* ── 无结果 ── */
.no-results{
  padding: 60px 20px;
  text-align: center;
  color: var(--text-sub);
}

.no-results-icon{
  font-size: 48px;
  margin-bottom: 16px;
  opacity: .6;
}

.no-results-text{
  font-size: 15px;
}

/* ── 移动端 sidebar ── */
@media (max-width:768px){
  .sidebar{
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: 8px 0 32px rgba(0,0,0,0.15);
    z-index: 35;
    padding-top: 80px;
  }
  .sidebar.open{
    transform: translateX(0);
  }
  .sidebar-overlay.open{
    display: block;
  }
  .sidebar-toggle{
    display: flex;
  }
  .header-content{
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }
  .header-search{
    max-width: 100%;
  }
  .header-brand{
    justify-content: center;
  }
  .group-cards{
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

/* ── 手机 ≤640px ── */
@media (max-width:640px){
  .header{
    padding-top: max(24px, calc(env(safe-area-inset-top,0px) + 16px));
    padding-bottom: 20px;
    padding-left:  max(20px, env(safe-area-inset-left,0px));
    padding-right: max(20px, env(safe-area-inset-right,0px));
  }
  .header-icon{ font-size: 28px; }
  .header-title{ font-size: 1.15rem; }
  .search-input{
    padding: 10px 40px 10px 40px;
    font-size: 13px;
  }
  .container{
    padding: 20px max(16px, env(safe-area-inset-left,0px))
             36px  max(16px, env(safe-area-inset-right,0px));
  }
  .container.sub-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 12px;
  }
  .service-group{ margin-bottom: 28px; }
  .group-title{ font-size: 17px; margin-bottom: 14px; }
  .group-subtitle{ font-size: 13px; margin: 14px 0 10px; }
  .card{ padding: 22px 12px 18px; }
  .icon{ width: 48px; height: 48px; font-size: 22px; }
  .icon-img{ width: 26px; height: 26px; }
  .card-title{ font-size: clamp(.8rem, 3vw, .95rem); margin-top: 12px; }
  .card-desc{  font-size: clamp(.68rem, 2.5vw, .75rem); }
}

@media (max-width:380px){
  .container.sub-grid{ gap: 10px 8px; }
  .card{ padding: 18px 8px 14px; }
  .icon{ width: 42px; height: 42px; font-size: 20px; }
  .icon-img{ width: 22px; height: 22px; }
}

/* ── 超宽屏 ── */
@media (min-width:1400px){
  .container.sub-grid{
    grid-template-columns: repeat(5, 1fr);
  }
  .group-cards{
    grid-template-columns: repeat(5, 1fr);
  }
}