/* ==========================================================================
   浮力社 (fulishe.uk) 官方永久发布页核心美学样式表
   两套主题美学：
   - 黑夜主题 A：【魅惑纯欲风】(Sensual Velvet Night) - 丝绒暗紫底 + 纯欲樱粉 + 香槟金
   - 白天主题 B：【温馨港湾风】(Warm Cozy Sanctuary) - 暖咖暖阳底 + 焦糖琥珀 + 居家温存
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量系统 (Design Tokens)
   -------------------------------------------------------------------------- */

/* 默认深色主题 (Theme A：魅惑纯欲风) */
:root, html[data-theme="dark"] {
  --bg-color: #0c0813;
  --bg-image-url: url('./assets/bg-night.jpg');
  --bg-overlay: linear-gradient(180deg, rgba(12, 8, 19, 0.85) 0%, rgba(16, 10, 26, 0.94) 100%);
  
  /* 双侧写真画报羽化侧翼 (硬件加速低功耗渲染) */
  --flank-left-img: url('./assets/thumb-stocking.jpg');
  --flank-right-img: url('./assets/thumb-catgirl.jpg');
  --flank-opacity: 0.46;
  --flank-filter: brightness(0.72) contrast(1.08);
  
  --surface-card: rgba(22, 14, 32, 0.78);
  --surface-card-hover: rgba(30, 18, 44, 0.92);
  --surface-inner: rgba(0, 0, 0, 0.45);
  
  --hero-bg: radial-gradient(circle at 50% 30%, rgba(255, 45, 112, 0.14) 0%, rgba(18, 12, 28, 0.94) 100%);
  --hero-border: rgba(255, 45, 112, 0.35);
  --hero-glow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 45px rgba(255, 45, 112, 0.18);
  
  --accent-primary: #ff2d70;
  --accent-primary-hover: #ff5c8a;
  --accent-glow: rgba(255, 45, 112, 0.4);
  --accent-secondary: #f5c518; /* 暖香槟金 */
  --accent-tertiary: #a855f7;  /* 丝绒紫 */
  
  --domain-gradient: linear-gradient(135deg, #ff2d70 0%, #d946ef 50%, #f5c518 100%);
  --domain-shadow: 0 10px 40px rgba(255, 45, 112, 0.4);
  
  --btn-primary-bg: linear-gradient(135deg, #ff2d70 0%, #c026d3 100%);
  --btn-primary-text: #ffffff;
  --btn-primary-shadow: 0 4px 22px rgba(255, 45, 112, 0.48);
  
  --text-primary: #ffffff;
  --text-secondary: #a9a2b5;
  --text-muted: #6b6375;
  
  --border-color: rgba(255, 255, 255, 0.09);
  --border-active: rgba(255, 45, 112, 0.48);
  
  --orb-1-color: rgba(255, 45, 112, 0.25);
  --orb-2-color: rgba(168, 85, 247, 0.18);
  --orb-3-color: rgba(245, 197, 24, 0.15);
  
  --speed-fast: #10b981;
  --speed-medium: #f59e0b;
  --speed-slow: #ef4444;
  
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* 浅色主题 (Theme B：温馨港湾风) */
html[data-theme="light"] {
  --bg-color: #fbf8f3;
  --bg-image-url: url('./assets/bg-day.jpg');
  --bg-overlay: linear-gradient(180deg, rgba(251, 248, 243, 0.88) 0%, rgba(244, 237, 226, 0.96) 100%);
  
  /* 双侧写真画报羽化侧翼 (硬件加速低功耗渲染) */
  --flank-left-img: url('./assets/thumb-purebed.jpg');
  --flank-right-img: url('./assets/thumb-whitestocking.jpg');
  --flank-opacity: 0.32;
  --flank-filter: brightness(0.96) contrast(1.04);
  
  --surface-card: rgba(255, 255, 255, 0.9);
  --surface-card-hover: rgba(255, 255, 255, 0.98);
  --surface-inner: rgba(0, 0, 0, 0.04);
  
  --hero-bg: radial-gradient(circle at 50% 30%, rgba(217, 119, 6, 0.09) 0%, rgba(255, 255, 255, 0.97) 100%);
  --hero-border: rgba(217, 119, 6, 0.3);
  --hero-glow: 0 15px 45px rgba(180, 130, 80, 0.14), 0 0 30px rgba(217, 119, 6, 0.09);
  
  --accent-primary: #d97706; /* 暖焦糖琥珀 */
  --accent-primary-hover: #b45309;
  --accent-glow: rgba(217, 119, 6, 0.3);
  --accent-secondary: #f59e0b;
  --accent-tertiary: #e11d48;
  
  --domain-gradient: linear-gradient(135deg, #d97706 0%, #ea580c 50%, #b45309 100%);
  --domain-shadow: 0 8px 30px rgba(217, 119, 6, 0.28);
  
  --btn-primary-bg: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  --btn-primary-text: #ffffff;
  --btn-primary-shadow: 0 4px 20px rgba(217, 119, 6, 0.38);
  
  --text-primary: #2b1f17;
  --text-secondary: #635347;
  --text-muted: #9c8a7c;
  
  --border-color: rgba(180, 130, 80, 0.14);
  --border-active: rgba(217, 119, 6, 0.48);
  
  --orb-1-color: rgba(217, 119, 6, 0.18);
  --orb-2-color: rgba(245, 158, 11, 0.14);
  --orb-3-color: rgba(234, 88, 12, 0.1);
}

/* --------------------------------------------------------------------------
   2. 基础重置与多层立体背景 (3-Layer Ambient Background)
   -------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
  position: relative;
}

/* 背景全屏柔光壁纸层 (硬件加速合成，彻底消除滚动重绘卡顿) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: var(--bg-overlay), var(--bg-image-url);
  background-size: cover;
  background-position: center 20%;
  z-index: -3;
  pointer-events: none;
  transform: translateZ(0) scale(1.02);
  will-change: opacity;
  transition: background-image 0.5s ease;
}

/* 左右双侧视差写真画报侧翼 (轻量渐变蒙版，杜绝重度卷积滤镜开销) */
.bg-flank-left {
  position: fixed;
  top: 0;
  left: 0;
  width: 480px;
  height: 100vh;
  background-image: var(--flank-left-img);
  background-size: cover;
  background-position: center 15%;
  filter: var(--flank-filter);
  mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,0.4) 65%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,0.4) 65%, transparent 100%);
  pointer-events: none;
  z-index: -2;
  opacity: var(--flank-opacity);
  transform: translateZ(0);
  will-change: opacity;
  transition: opacity 0.5s ease, background-image 0.5s ease;
}

.bg-flank-right {
  position: fixed;
  top: 0;
  right: 0;
  width: 480px;
  height: 100vh;
  background-image: var(--flank-right-img);
  background-size: cover;
  background-position: center 15%;
  filter: var(--flank-filter);
  mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0.4) 65%, transparent 100%);
  -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0.4) 65%, transparent 100%);
  pointer-events: none;
  z-index: -2;
  opacity: var(--flank-opacity);
  transform: translateZ(0);
  will-change: opacity;
  transition: opacity 0.5s ease, background-image 0.5s ease;
}

/* 梦幻呼吸流光光斑层 (采用原生径向渐变雾化，零 Blur 开销，极致流畅) */
.ambient-bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
  contain: strict;
  transform: translateZ(0);
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.82;
  transform: translateZ(0);
  will-change: transform;
  animation: orb-float 18s infinite ease-in-out alternate;
}

.ambient-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--orb-1-color) 0%, rgba(255, 45, 112, 0) 70%);
  top: -120px;
  left: 20%;
  animation-duration: 20s;
}

.ambient-orb-2 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--orb-2-color) 0%, rgba(168, 85, 247, 0) 70%);
  top: 35%;
  right: -90px;
  animation-duration: 24s;
}

.ambient-orb-3 {
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, var(--orb-3-color) 0%, rgba(245, 197, 24, 0) 70%);
  bottom: 5%;
  left: -60px;
  animation-duration: 22s;
}

@keyframes orb-float {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 50px) scale(1.1); }
  100% { transform: translate(-30px, -35px) scale(0.96); }
}

/* 玻璃拟态卡片 (轻量 10px 磨砂，兼顾高级质感与 60FPS 帧率) */
.glass {
  background: var(--surface-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  transform: translateZ(0);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
}

.glass:hover {
  border-color: var(--border-active);
}

/* 页面主容器 */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 5rem;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   3. 顶部导航栏 (Navbar)
   -------------------------------------------------------------------------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  margin-bottom: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 18px var(--accent-glow);
}

.nav-brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.nav-right-tools {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.nav-update-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #10b981;
  font-size: 0.8rem;
  font-weight: 600;
}

.nav-update-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-primary);
  transform: scale(1.06);
}

/* --------------------------------------------------------------------------
   4. 巨幅大抬头 (Hero Card)
   -------------------------------------------------------------------------- */
.hero-giant-card {
  position: relative;
  background: var(--hero-bg);
  border: 1.5px solid var(--hero-border);
  box-shadow: var(--hero-glow);
  border-radius: 28px;
  padding: 3.8rem 2rem 3.5rem;
  text-align: center;
  margin-bottom: 3.5rem;
  min-height: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transform: translateZ(0);
}

.hero-giant-card::before {
  content: "";
  position: absolute;
  top: -25%;
  left: 50%;
  transform: translateX(-50%);
  width: 580px;
  height: 320px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 75%);
  pointer-events: none;
}

.hero-auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  background: rgba(255, 45, 112, 0.12);
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.02em;
}

html[data-theme="light"] .hero-auth-badge {
  background: rgba(217, 119, 6, 0.12);
}

.hero-main-title {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
  line-height: 1.2;
}

.hero-domain-showcase {
  font-family: var(--font-mono);
  font-size: 4.6rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  background: var(--domain-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: var(--domain-shadow);
  margin-bottom: 1.6rem;
  line-height: 1.1;
  user-select: all;
  cursor: pointer;
}

.hero-instruction-text {
  max-width: 720px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 2rem;
}

.hero-instruction-text strong {
  color: var(--text-primary);
}

.hero-dns-highlight {
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  background: var(--surface-inner);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.hero-tags-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.8rem;
  flex-wrap: wrap;
  margin-bottom: 2.4rem;
}

.hero-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.hero-tag-item span:first-child {
  color: var(--accent-primary);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.btn-hero-bookmark {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: none;
  font-size: 1.08rem;
  font-weight: 800;
  padding: 0.9rem 2.4rem;
  border-radius: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--btn-primary-shadow);
}

.btn-hero-bookmark:hover {
  transform: translateY(-2px) scale(1.02);
  filter: brightness(1.1);
}

.btn-hero-copy {
  background: var(--surface-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.9rem 2rem;
  border-radius: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: all 0.2s ease;
}

.btn-hero-copy:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   5. 选择访问专线 (3列网格与热闹动效)
   -------------------------------------------------------------------------- */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.section-title-wrap h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.section-legend {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.legend-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 0.3rem;
}

.legend-fast { background: var(--speed-fast); box-shadow: 0 0 6px var(--speed-fast); }
.legend-medium { background: var(--speed-medium); }
.legend-slow { background: var(--speed-slow); }

.lines-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.line-card {
  position: relative;
  padding: 1.7rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: 20px;
  min-height: 230px;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.line-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.line-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--surface-inner);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}

.line-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
}

.line-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.2rem;
  flex: 1;
}

.line-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.95rem;
  border-top: 1px solid var(--border-color);
}

.speed-meter {
  display: flex;
  flex-direction: column;
}

.speed-value {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-muted);
}

.speed-value.fast { color: var(--speed-fast); text-shadow: 0 0 10px rgba(16, 185, 129, 0.4); }
.speed-value.medium { color: var(--speed-medium); }
.speed-value.slow { color: var(--speed-slow); }

.speed-status-text {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.btn-enter-pill {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.48rem 1.1rem;
  border-radius: 9px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.btn-enter-pill:hover {
  background: var(--surface-card-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* 推荐主入口专属高亮 */
.line-card.primary {
  background: linear-gradient(145deg, rgba(255, 45, 112, 0.1) 0%, var(--surface-card) 100%);
  border: 1.8px solid var(--accent-primary);
  box-shadow: 0 0 35px var(--accent-glow), 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

html[data-theme="light"] .line-card.primary {
  background: linear-gradient(145deg, rgba(217, 119, 6, 0.1) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.line-card.primary .btn-enter-pill {
  background: var(--btn-primary-bg);
  border: none;
  color: #fff;
  box-shadow: var(--btn-primary-shadow);
}

.line-card.primary .btn-enter-pill:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.live-crowd-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  font-size: 0.76rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.live-pulse-green {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  position: relative;
  box-shadow: 0 0 8px #10b981;
}

.live-pulse-green::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1px solid #10b981;
  animation: pulse-out 1.8s infinite ease-out;
}

@keyframes pulse-out {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2.4); opacity: 0; }
}

.live-activity-ticker {
  background: rgba(0, 0, 0, 0.38);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
}

.ticker-text {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.card-wrapper-with-trinkets {
  position: relative;
}

.trinket-particle {
  position: absolute;
  pointer-events: none;
  font-size: 1.5rem;
  z-index: 1;
  animation: trinket-pop 1.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes trinket-pop {
  0% {
    opacity: 0;
    transform: translate(0, 0) scale(0.4) rotate(0deg);
  }
  20% {
    opacity: 1;
    transform: translate(var(--tx-20), var(--ty-20)) scale(1.25) rotate(var(--rot-20));
  }
  100% {
    opacity: 0;
    transform: translate(var(--tx-100), var(--ty-100)) scale(0.6) rotate(var(--rot-100));
  }
}

.btn-retest {
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.82rem;
  padding: 0.35rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s;
}

.btn-retest:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.btn-retest.loading svg {
  animation: spin 1s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

/* --------------------------------------------------------------------------
   6. 热门分类快捷通道 (精致图标表情胶囊 · 极速轻量免加载)
   -------------------------------------------------------------------------- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.category-chip {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.95rem 1.15rem;
  border-radius: 16px;
  background: var(--surface-card);
  border: 1px solid var(--border-color);
  text-decoration: none;
  color: var(--text-primary);
  transform: translateZ(0);
  position: relative;
  overflow: hidden;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.category-chip::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 50%, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.category-chip:hover {
  transform: translateY(-2px);
  border-color: var(--border-active);
  background: var(--surface-card-hover);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), 0 0 15px var(--accent-glow);
}

.category-chip:hover::before {
  opacity: 1;
}

.category-chip-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--surface-inner);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.category-chip:hover .category-chip-icon {
  transform: scale(1.12) rotate(4deg);
  border-color: var(--accent-primary);
}

.category-chip-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.category-chip-name {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s;
}

.category-chip:hover .category-chip-name {
  color: var(--accent-primary);
}

.category-chip-tag {
  font-size: 0.74rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-chip-arrow {
  color: var(--text-muted);
  opacity: 0.45;
  transition: transform 0.2s ease, opacity 0.2s ease, color 0.2s ease;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.category-chip:hover .category-chip-arrow {
  opacity: 1;
  color: var(--accent-primary);
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   7. 官方防失联社群与应急邮箱
   -------------------------------------------------------------------------- */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.contact-card {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.7rem;
}

.contact-icon-box {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  background: rgba(255, 45, 112, 0.12);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

html[data-theme="light"] .contact-icon-box {
  background: rgba(217, 119, 6, 0.12);
}

.contact-title { font-size: 1.15rem; font-weight: 800; color: var(--text-primary); }
.contact-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 1.3rem; }

.btn-contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.75rem 1.2rem;
  border-radius: 12px;
  background: var(--surface-inner);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-contact:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

/* 官方严正声明 */
.notice-box {
  padding: 1.6rem 2rem;
  margin-bottom: 3.5rem;
  border-left: 4px solid var(--accent-secondary);
}

.notice-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-secondary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notice-list {
  padding-left: 1.2rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}

.notice-list li { margin-bottom: 0.45rem; }

/* 页脚 */
.footer {
  text-align: center;
  font-size: 0.86rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 2.2rem;
  line-height: 1.85;
}

.footer-domain { color: var(--accent-primary); font-weight: 800; }

/* Toast 提示浮窗 */
.toast-container {
  position: fixed;
  bottom: 2.2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(22, 14, 32, 0.96);
  backdrop-filter: blur(16px);
  border: 1.5px solid var(--accent-primary);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.8), 0 0 25px var(--accent-glow);
  color: #ffffff;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 99999;
}

.toast-container.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* 手机端收藏指引弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 100000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open { opacity: 1; pointer-events: auto; }

.modal-box {
  background: #140d1e;
  border: 1.5px solid var(--accent-primary);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
  border-radius: 24px;
  width: 100%;
  max-width: 480px;
  padding: 2.2rem;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
  color: #fff;
}

html[data-theme="light"] .modal-box {
  background: #fdfbf7;
  color: #2b1f17;
}

.modal-overlay.open .modal-box { transform: scale(1); }

.modal-close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-title { font-size: 1.4rem; font-weight: 800; color: var(--text-primary); margin-bottom: 1.1rem; }
.modal-step { margin-bottom: 1.1rem; font-size: 0.94rem; color: var(--text-secondary); line-height: 1.7; }
.modal-step strong { color: var(--accent-primary); }

/* --------------------------------------------------------------------------
   8. 移动端响应式断点
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .lines-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  
  .category-chip {
    padding: 0.8rem 0.95rem;
    gap: 0.65rem;
  }
  
  .category-chip-icon {
    width: 38px;
    height: 38px;
    font-size: 1.25rem;
  }
  
  .hero-giant-card {
    padding: 2.8rem 1.4rem;
    min-height: auto;
  }
  
  .hero-main-title {
    font-size: 2.3rem;
  }
  
  .hero-domain-showcase {
    font-size: 3.4rem;
  }
  
  .hero-tags-row {
    gap: 0.8rem;
    flex-direction: column;
  }
  
  .contact-section {
    grid-template-columns: 1fr;
  }

  .bg-flank-left, .bg-flank-right {
    width: 260px;
    opacity: 0.35;
  }
}