/* ==========================================
   网站合集 — 样式表
   ========================================== */

/* ---------- CSS Variables / Theming ---------- */
:root {
  --bg: #f0f2f5;
  --bg-card: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.85);
  --bg-input: #e8eaed;
  --bg-nav-hover: #e8eaed;
  --bg-fallback: #e0e4e8;
  --text: #1a1a2e;
  --text-secondary: #5f6b7a;
  --text-muted: #8b95a5;
  --border: #e2e5ea;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: #eef2ff;
  --radius: 14px;
  --radius-sm: 10px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-header: rgba(15, 17, 23, 0.88);
  --bg-input: #242736;
  --bg-nav-hover: #242736;
  --bg-fallback: #2a2d3a;
  --text: #e8eaed;
  --text-secondary: #9aa0b0;
  --text-muted: #6b7280;
  --border: #2a2d3a;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-light: #1e1b4b;
}

/* 深色模式背景光球 */
[data-theme="dark"] body::before {
  background: radial-gradient(circle, rgba(129, 140, 248, 0.08) 0%, transparent 70%);
}

[data-theme="dark"] body::after {
  background: radial-gradient(circle, rgba(167, 139, 250, 0.06) 0%, transparent 70%);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 155px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
               Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  position: relative;
  overflow-x: hidden;
}

/* 背景浮动光球 */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

body::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.06) 0%, transparent 70%);
  top: -200px;
  right: -150px;
  animation: floatOrb1 20s ease-in-out infinite;
}

body::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(167, 139, 250, 0.05) 0%, transparent 70%);
  bottom: -150px;
  left: -100px;
  animation: floatOrb2 25s ease-in-out infinite;
}

@keyframes floatOrb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(-80px, 60px) scale(1.15); }
  50% { transform: translate(-40px, -30px) scale(0.9); }
  75% { transform: translate(60px, -50px) scale(1.1); }
}

@keyframes floatOrb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(70px, -50px) scale(1.2); }
  66% { transform: translate(-50px, 40px) scale(0.85); }
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

/* ==========================================
   KEYFRAMES — 动画库
   ========================================== */

/* 卡片入场 — 弹簧弹入 */
@keyframes cardEnter {
  0% {
    opacity: 0;
    transform: translateY(60px) scale(0.85);
  }
  60% {
    opacity: 1;
    transform: translateY(-8px) scale(1.02);
  }
  80% {
    transform: translateY(2px) scale(0.99);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 标题滑入 */
@keyframes slideInLeft {
  0% {
    opacity: 0;
    transform: translateX(-40px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 标题下划线渐展 */
@keyframes underlineExpand {
  0% { transform: scaleX(0); }
  100% { transform: scaleX(1); }
}

/* Logo 文字流光 */
@keyframes logoShimmer {
  0%, 100% { background-position: -200% center; }
  50% { background-position: 200% center; }
}

/* 搜索框聚焦脉冲 */
@keyframes searchPulse {
  0% { box-shadow: 0 0 0 0 var(--accent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* 主题切换旋转 */
@keyframes themeSpin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(0.7); }
  100% { transform: rotate(360deg) scale(1); }
}

/* 回到顶部 — 悬浮脉冲 */
@keyframes floatPulse {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* 激活标签脉冲光晕 */
@keyframes activeGlow {
  0%, 100% { box-shadow: 0 0 8px rgba(79, 70, 229, 0.3), 0 0 20px rgba(79, 70, 229, 0.1); }
  50% { box-shadow: 0 0 16px rgba(79, 70, 229, 0.5), 0 0 36px rgba(79, 70, 229, 0.2); }
}

/* 卡片图标弹跳 */
@keyframes iconBounce {
  0%, 100% { transform: scale(1); }
  40% { transform: scale(1.25); }
  60% { transform: scale(0.9); }
  80% { transform: scale(1.05); }
}

/* 光晕扫过 */
@keyframes shimmerSweep {
  0% { left: -100%; }
  100% { left: 200%; }
}

/* Footer 文字流光 */
@keyframes textShimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  transition: background 0.3s ease;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: -0.5px;
  /* 流光文字 */
  background: linear-gradient(90deg, var(--accent), #a78bfa, var(--accent-hover), var(--accent));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: logoShimmer 4s ease-in-out infinite;
}

.logo-sub {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-top: -2px;
}

/* ---------- Search ---------- */
.search-wrap {
  flex: 1;
  min-width: 200px;
  max-width: 420px;
  position: relative;
}

.search-wrap .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
  opacity: 0.5;
}

#search-input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  border: 2px solid transparent;
  border-radius: 50px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.25s ease;
}

#search-input::placeholder {
  color: var(--text-muted);
}

#search-input:focus {
  border-color: var(--accent);
  animation: searchPulse 2s ease-out infinite;
}

/* ---------- Theme Toggle ---------- */
#theme-toggle {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease, transform 0.6s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

#theme-toggle:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
  transform: rotate(15deg) scale(1.1);
}

#theme-toggle.spinning {
  animation: themeSpin 0.8s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

/* ---------- Category Nav — 真实玻璃悬浮胶囊 ---------- */
.category-nav-wrap {
  position: fixed;
  top: 92px;
  left: 18px;
  right: 18px;
  z-index: 99;
  width: auto;
  /* 极致透明 — 仅保留轮廓 */
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.04);
  padding: 6px 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.category-nav-wrap::-webkit-scrollbar {
  height: 0;
}

/* 深色模式 — 真实玻璃悬浮胶囊 */
[data-theme="dark"] .category-nav-wrap {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.2);
}

/* 全局聚光灯 — 强力光斑跟随鼠标 */
.spotlight {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.6) 0%,
    rgba(255, 255, 255, 0.3) 15%,
    rgba(255, 255, 255, 0.1) 40%,
    rgba(255, 255, 255, 0.02) 70%,
    transparent 100%
  );
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
}

[data-theme="dark"] .spotlight {
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.35) 0%,
    rgba(255, 255, 255, 0.18) 15%,
    rgba(255, 255, 255, 0.06) 40%,
    rgba(255, 255, 255, 0.01) 70%,
    transparent 100%
  );
  mix-blend-mode: screen;
}

#category-nav {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 50px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  position: relative;
}

.nav-tab:hover {
  background: rgba(128, 128, 128, 0.08);
  color: var(--text);
}

.nav-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  animation: activeGlow 2.5s ease-in-out infinite;
}

[data-theme="dark"] .nav-tab.active {
  animation: activeGlow 2.5s ease-in-out infinite;
}

.nav-tab .nav-icon {
  font-size: 1rem;
}

/* ---------- Main Content ---------- */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 78px 24px 60px;
  perspective: 800px;
}

.category {
  margin-bottom: 48px;
}

.category:last-child {
  margin-bottom: 0;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  /* 入场动画 */
  opacity: 0;
  transform: translateX(-40px);
  animation: slideInLeft 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* 渐变下划线 */
.category-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa, transparent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  animation: underlineExpand 0.8s 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.subgroup {
  margin-bottom: 32px;
}

.subgroup:last-child {
  margin-bottom: 0;
}

.subgroup-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 14px;
  padding-left: 4px;
  position: relative;
  transition: color 0.3s ease, transform 0.3s ease;
}

.subgroup-title:hover {
  color: var(--accent);
  transform: translateX(4px);
}

/* ---------- Card Grid ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(228px, 1fr));
  gap: 14px;
}

/* ---------- Card ---------- */
.card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  /* 入场动画由 JS 设置 delay */
  opacity: 0;
  transform: translateY(60px) scale(0.85);
}

.card.entered {
  animation: cardEnter 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* 光晕扫过遮罩 */
.card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -100%;
  width: 60%;
  height: 200%;
  background: linear-gradient(
    105deg,
    transparent 30%,
    rgba(255, 255, 255, 0.15) 45%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0.15) 55%,
    transparent 70%
  );
  transform: skewX(-20deg);
  transition: none;
  z-index: 2;
  pointer-events: none;
  border-radius: 0;
}

.card:hover::before {
  animation: shimmerSweep 0.7s ease-out forwards;
}

.card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
  z-index: 10;
}

.card:hover .card-icon-img {
  animation: iconBounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card:active {
  transform: translateY(-2px) scale(0.98);
  transition: all 0.1s ease;
}

/* 入场延迟 — 由 JS 设置 inline style */

/* 卡片点击涟漪 */
.card-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.2);
  transform: scale(0);
  animation: rippleEffect 0.7s ease-out forwards;
  pointer-events: none;
  z-index: 3;
}

[data-theme="dark"] .card-ripple {
  background: rgba(129, 140, 248, 0.25);
}

@keyframes rippleEffect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Card Icon — 无背景 PNG 素材风格 */
.card-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: visible;
  position: relative;
  z-index: 1;
}

.card-icon-img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

/* 文字回退 — 仅无图形化图标的网站显示 */
.card-icon-fallback {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 50%;
}

/* Card Info */
.card-info {
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.card-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* External link indicator */
.card::after {
  content: '↗';
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 1;
}

.card:hover::after {
  opacity: 0.6;
}

/* ---------- Back to Top ---------- */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  animation: floatPulse 3s ease-in-out infinite;
}

#back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 24px rgba(79, 70, 229, 0.3);
  animation: none;
  transform: translateY(-4px) scale(1.1);
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  /* 流光文字 */
  background: linear-gradient(90deg, var(--text-muted), var(--accent), var(--text-muted));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textShimmer 4s ease-in-out infinite;
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
  }

  .header {
    padding: 14px 18px;
  }

  .main-content {
    padding: 66px 18px 48px;
  }

  .category-nav-wrap {
    top: 84px;
    left: 14px;
    right: 14px;
    padding: 6px 14px;
    border-radius: 40px;
  }

  .nav-tab .nav-label {
    display: none;
  }

  .nav-tab {
    padding: 10px 14px;
    font-size: 1.05rem;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
  }

  .header-inner {
    gap: 10px;
  }

  .logo-wrap {
    align-items: flex-start;
  }

  .logo {
    font-size: 1.15rem;
  }

  .logo-sub {
    font-size: 0.65rem;
  }

  .search-wrap {
    min-width: 0;
    flex: 1;
  }

  .category-title {
    font-size: 1.2rem;
  }

  .category-nav-wrap {
    top: 72px;
    left: 8px;
    right: 8px;
    padding: 5px 8px;
    border-radius: 30px;
  }

  .nav-tab {
    padding: 7px 9px;
    gap: 0;
    font-size: 0.78rem;
  }

  .card {
    padding: 12px 14px;
    gap: 10px;
    border-radius: var(--radius-sm);
  }

  /* 移动端缩小光球 */
  body::before {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -80px;
  }
  body::after {
    width: 250px;
    height: 250px;
    bottom: -80px;
    left: -60px;
  }

  /* 移动端聚光灯更小 */
  .spotlight {
    width: 180px;
    height: 180px;
  }

  /* 移动端禁用 3D 倾斜（触屏无 hover） */
  .card:hover {
    transform: translateY(-3px) scale(1.02);
  }
  .card:hover::before {
    animation: shimmerSweep 0.7s ease-out forwards;
  }

  .card-icon {
    width: 36px;
    height: 36px;
  }

  .card-icon-img {
    width: 30px;
    height: 30px;
  }

  .card-icon-fallback {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }

  .card-name {
    font-size: 0.88rem;
  }

  .card-desc {
    font-size: 0.73rem;
  }

  .card::after {
    display: none;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}

/* Very small screens */
@media (max-width: 380px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .card {
    padding: 10px 12px;
    gap: 8px;
  }

  .category-nav-wrap {
    top: 68px;
    left: 6px;
    right: 6px;
    padding: 4px 6px;
    border-radius: 24px;
  }

  .nav-tab {
    padding: 6px 8px;
    font-size: 0.72rem;
  }

  .spotlight {
    width: 140px;
    height: 140px;
  }

  .card-icon {
    width: 30px;
    height: 30px;
  }

  .card-icon-img {
    width: 24px;
    height: 24px;
  }

  .card-icon-fallback {
    width: 28px;
    height: 28px;
    font-size: 0.85rem;
  }
}