/* 配色与主题：黑/绿/红 渗透测试风格 */
:root {
  --bg: #0a0a0a;
  --panel: #111214;
  --text: #d7dce2;
  --muted: #9aa3ab;
  --green: #17ff65;
  --red: #ff2e2e;
  --grid: #1e2a1e;
  --outline: #1f2429;
  --shadow: rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  padding-top: 64px;
}
img { max-width: 100%; display: block; }
.container { width: min(1100px, 92%); margin: 0 auto; }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(10, 10, 10, 0.55);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--outline);
  box-shadow: 0 8px 20px var(--shadow);
}

body {
  padding-top: 72px; /* 防止固定头部遮挡内容 */
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-list .icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; position: relative; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 6px; background: #0f1316; outline: 1px solid var(--outline); box-shadow: 0 6px 20px var(--shadow); color: var(--green); font-weight: 700; }
.brand-name { font-weight: 700; letter-spacing: 0.3px; }

.menu-toggle { display: none; border: none; background: transparent; color: var(--text); font-size: 20px; }
.nav-list { display: flex; gap: 18px; list-style: none; margin: 0; padding: 0; }
.nav-list a { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); padding: 8px 10px; border-radius: 8px; }
.nav-list a .icon { width: 18px; height: 18px; }
.nav-list a:hover { background: #12161a; color: var(--green); }
.nav-list a.active { color: var(--green); }

/* Hero */
.hero { padding: 40px 0 60px; background: radial-gradient(1000px 400px at 10% 10%, rgba(23,255,101,0.08), transparent 60%), radial-gradient(800px 400px at 90% 20%, rgba(255,46,46,0.06), transparent 60%); position: relative; }
.hero-inner { display: flex; align-items: center; gap: 36px; }
.hero-content { flex: 1 1 520px; }
.hero-content h1 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 44px); color: var(--green); }
.hero-content p { margin: 0 0 18px; color: var(--muted); }
.hero-actions { display: flex; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 10px; text-decoration: none; font-weight: 600; }
.btn-primary { background: var(--green); color: #0a0a0a; }
.btn-primary:hover { filter: brightness(0.9); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-outline { border: 1px solid var(--outline); color: var(--text); }
.btn-outline:hover { background: #12161a; }

.hero-visual { flex: 1 1 500px; min-height: 360px; position: relative; }
.pentest-hero-svg { width: 100%; height: auto; border-radius: 14px; outline: 1px solid var(--outline); box-shadow: 0 10px 30px var(--shadow); display: block; }

/* Sections */
.section { padding: 60px 0; background: linear-gradient(180deg, rgba(16,17,19,1), rgba(14,15,17,1)); }
.section.alt { background: linear-gradient(180deg, rgba(14,15,17,1), rgba(12,13,15,1)); }
.section-header h2 {
  display: flex;
  align-items: center;
  gap: 10px;
}
/* 仅“联系我们”标题居中 */
.contact .section-header h2 {
  justify-content: center;
}
.section-header p { margin: 0 0 22px; color: var(--muted); }

.grid { display: grid; gap: 18px; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card { background: var(--panel); border: 1px solid var(--outline); border-radius: 14px; padding: 16px; box-shadow: 0 10px 20px var(--shadow); }
.card h3 { margin: 0 0 8px; color: var(--text); font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
/* 交互过渡 */
.card, .step, .tl-item { transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease; }
/* 确保覆盖层定位 */
.card, .tl-item { position: relative; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.step { background: var(--panel); border: 1px solid var(--outline); border-radius: 14px; padding: 16px; position: relative; }
.step .num { position: absolute; top: 12px; right: 14px; color: var(--red); font-weight: 700; opacity: 0.8; }
.step h3 { margin: 0 0 8px; color: var(--text); }
.step p { margin: 0; color: var(--muted); }

/* Timeline */
.timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.tl-item { background: var(--panel); border: 1px solid var(--outline); border-radius: 14px; padding: 16px; }
.tl-item h3 { margin: 0 0 8px; }
.tl-item p { margin: 0; color: var(--muted); }

/* Contact */
.contact { text-align: center; }
.contact-ways { display: inline-flex; gap: 12px; }
.legal { margin-top: 14px; color: var(--muted); font-size: 14px; }

/* Footer */
.site-footer { border-top: 1px solid var(--outline); padding: 24px 0; background: #0a0a0a; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

/* Reveal animations */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 900px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(10,10,10,0.9); backdrop-filter: saturate(1.1) blur(8px); -webkit-backdrop-filter: saturate(1.1) blur(8px); border-top: 1px solid var(--outline); border-bottom: 1px solid var(--outline); box-shadow: 0 8px 20px var(--shadow); padding: 10px 0; }
  .menu-toggle { display: inline-block; }
  .nav-list { flex-direction: column; gap: 4px; padding: 0 12px; }
  .nav-list a { padding: 12px 10px; border-top: 1px solid var(--outline); }
  .nav-list a:last-child { border-bottom: 1px solid var(--outline); }
  .nav-list .icon { width: 18px; height: 18px; }
  /* 浅色模式下进一步加深移动端导航透明度 */
  [data-theme="light"] .nav { background: rgba(255,255,255,0.92); }
  /* 浅色模式下移动端导航项悬停/聚焦更亮的灰白背景 */
  [data-theme="light"] .nav-list a:hover,
  [data-theme="light"] .nav-list a:focus-visible {
    background: rgba(255,255,255,0.96);
    color: var(--green);
    border-color: var(--green);
  }
  /* Hero 更紧凑，仅显示文字 */
  .hero { padding: 14px 0 20px; }
  .hero-inner { flex-direction: column; gap: 14px; }
  .hero-content h1 { font-size: clamp(22px, 6vw, 30px); }
  .hero-content p { font-size: 14px; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; }
  .hero-visual { display: none; }

  /* 版块与卡片间距压缩 */
  .section { padding: 40px 0; }
  .section.alt { padding: 40px 0; }
  .grid.three { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .card, .step, .tl-item { padding: 12px; }

  .contact-ways { flex-direction: column; gap: 10px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .btn { gap: 6px; }
}
.section-header .section-icon {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  stroke: currentColor;
  fill: none;
  opacity: 0.9;
}
@media (max-width: 900px) {
  .section-header .section-icon {
    width: 18px;
    height: 18px;
    flex: 0 0 18px;
    opacity: 0.85;
  }
}
/* 悬停与键盘聚焦效果 */
#services .card:hover, #services .card:focus-visible {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px var(--shadow);
  background: #12161a;
}
#methodology .step:hover, #methodology .step:focus-visible {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px var(--shadow);
  background: #12161a;
}
#toolkit .card:hover, #toolkit .card:focus-visible {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px var(--shadow);
  background: #12161a;
}
#process .tl-item:hover, #process .tl-item:focus-visible {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px var(--shadow);
  background: #12161a;
}

/* 3D翻转效果（非侵入式，保持自然高度） */
.flip { position: relative; perspective: 1000px; }
.flip-content, .flip-back { transform-style: preserve-3d; backface-visibility: hidden; }
.flip-content { transition: transform 520ms ease; }
.flip-back { position: absolute; inset: 0; padding: inherit; border-radius: inherit; transform: rotateY(180deg); transition: transform 520ms ease; filter: saturate(1.05) brightness(1.05); }
.flip:hover .flip-content, .flip:focus-visible .flip-content, .flip.flipped .flip-content { transform: rotateY(180deg); }
.flip:hover .flip-back, .flip:focus-visible .flip-back, .flip.flipped .flip-back { transform: rotateY(0); }
/* 背面标题轻微强调 */
.flip-back h3 { color: var(--green); }

@media (max-width: 900px) {
  /* 移动端保留轻微反馈，减小位移避免抖动 */
  #services .card:hover, #services .card:focus-visible,
  #methodology .step:hover, #methodology .step:focus-visible,
  #toolkit .card:hover, #toolkit .card:focus-visible,
  #process .tl-item:hover, #process .tl-item:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px var(--shadow);
  }
  /* 移动端翻转速度略降，避免眩晕 */
  .flip-content, .flip-back { transition-duration: 420ms; }
}

/* 玻璃碎裂效果覆盖层 */
.shatter .shatter-overlay { position: absolute; inset: 0; pointer-events: none; overflow: clip; }
.shatter .shard {
  position: absolute;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--outline);
  box-shadow: 0 6px 14px var(--shadow);
  transform-origin: center;
  opacity: 0;
}
.shatter-active .shard {
  animation: shardFly 700ms cubic-bezier(0.2, 0.7, 0.3, 1) forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes shardFly {
  0% { opacity: 0; transform: translate(0, 0) rotate(0deg) scale(1); }
  10% { opacity: 1; }
  100% { opacity: 0; transform: translate(var(--dx, 0), var(--dy, 0)) rotate(var(--rot, 0deg)) scale(0.98); }
}
.btn .icon { width: 18px; height: 18px; flex: 0 0 18px; }
@media (max-width: 900px) {
  .btn .icon { width: 18px; height: 18px; }
}
/* 轮播/横幅爆炸效果 */
.banner-explode { position: relative; }
.explode-overlay { position: absolute; inset: 0; pointer-events: none; overflow: clip; }
.explode-overlay .particle {
  position: absolute;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.7), rgba(255,255,255,0.05));
  border: 1px solid var(--outline);
  box-shadow: 0 6px 14px var(--shadow);
  transform-origin: center;
  opacity: 0;
  border-radius: 2px;
}
.explode-active .particle {
  animation: explodeBurst 800ms cubic-bezier(0.2, 0.7, 0.3, 1) forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes explodeBurst {
  0% { opacity: 0; transform: translate(0, 0) scale(0.6) rotate(0deg); }
  10% { opacity: 1; }
  100% { opacity: 0; transform: translate(var(--dx, 0), var(--dy, 0)) scale(1.25) rotate(var(--rot, 0deg)); }
}
/* 旋转地球图标动画 */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  box-shadow: 0 10px 22px rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
  pointer-events: none;
  z-index: 999;
}
.back-to-top::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(23,255,101,0.25) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.back-to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top .icon { width: 70%; height: 70%; animation: spin 10s linear infinite; }
.back-to-top:hover { background: rgba(255,255,255,0.1); box-shadow: 0 14px 28px rgba(0,0,0,0.45); }
.back-to-top:hover::before { opacity: 1; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

/* Hero视觉区爆炸效果与网络流量覆盖层 */
.banner-explode { position: relative; overflow: hidden; }
.explode-overlay { position: absolute; inset: 0; pointer-events: none; }
.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff, #8ad4ff);
  transform: translate(0,0) rotate(0deg);
  opacity: 0;
}
.banner-explode.explode-active .particle {
  animation: explodeBurst 0.9s ease-out var(--delay) both;
}
@keyframes explodeBurst {
  0% { transform: translate(0,0) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) rotate(var(--rot)); opacity: 0; }
}

/* 移除爆炸效果样式，仅保留网络流量覆盖层 */
/* 删除 .banner-explode / .explode-overlay / .particle / @keyframes explodeBurst 定义 */
.traffic-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* 浅色主题变量与覆盖样式 */
:root[data-theme="light"] {
  --bg: #f7f9fc;
  --panel: #ffffff;
  --text: #1a1d1f;
  --muted: #5b6570;
  --green: #17c964;
  --red: #e5484d;
  --grid: #e8f0e8;
  --outline: rgba(0,0,0,0.12);
  --shadow: rgba(0, 0, 0, 0.18);
}

/* 头部与导航在浅色主题下的玻璃效果调整 */
[data-theme="light"] .site-header {
  background: rgba(255,255,255,0.7);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--outline);
}
[data-theme="light"] .nav {
  background: rgba(255,255,255,0.65);
  backdrop-filter: saturate(1.1) blur(10px);
  -webkit-backdrop-filter: saturate(1.1) blur(10px);
  border-bottom: 1px solid var(--outline);
}

/* 版块与页脚背景适配浅色主题 */
[data-theme="light"] .section {
  background: linear-gradient(180deg, #ffffff, #f7f9fc);
}
[data-theme="light"] .section.alt {
  background: linear-gradient(180deg, #f7f9fc, #eef2f7);
}
[data-theme="light"] .site-footer { background: var(--panel); }

/* 返回顶部按钮在浅色主题下的互换风格 */
[data-theme="light"] .back-to-top {
  background: rgba(255,255,255,0.85);
  border: 1px solid rgba(0,0,0,0.12);
  box-shadow: 0 10px 22px rgba(0,0,0,0.15);
  color: var(--text);
}
[data-theme="light"] .back-to-top:hover {
  background: rgba(255,255,255,0.95);
  box-shadow: 0 14px 28px rgba(0,0,0,0.2);
}
[data-theme="light"] .back-to-top::before {
  background: radial-gradient(circle, rgba(23,201,100,0.22) 0%, transparent 60%);
}
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}
/* Toast 提示（跟随玻璃风格） */
.toast {
  position: fixed;
  right: 20px;
  bottom: 90px; /* 避开返回顶部按钮 */
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(30, 30, 30, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--text);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* 浅色主题下的 Toast 更亮 */
[data-theme="light"] .toast {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(180, 180, 180, 0.45);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}
/* 主题选择菜单（玻璃风格） */
.theme-menu {
  position: fixed;
  right: 20px;
  bottom: 90px; /* 位于返回顶部按钮上方 */
  z-index: 1000;
  min-width: 220px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(20, 20, 20, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.theme-menu.show { opacity: 1; transform: translateY(0); }
.theme-menu .theme-title {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
}
.theme-menu .option {
  width: 100%;
  display: block;
  text-align: left;
  padding: 8px 10px;
  margin: 6px 0;
  border-radius: 10px;
  border: 1px solid var(--outline);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.theme-menu .option:hover, .theme-menu .option:focus-visible {
  border-color: var(--green);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

/* 浅色主题下的菜单更亮 */
[data-theme="light"] .theme-menu {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}
[data-theme="light"] .theme-menu .option {
  background: rgba(255, 255, 255, 0.5);
}
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

/* 指定卡片悬停文字变绿（不影响 h2 标题） */
.hover-text-green:hover h3,
.hover-text-green:hover p,
.hover-text-green:focus-visible h3,
.hover-text-green:focus-visible p {
  color: var(--green);
}
/* 保留：仅标题 h2 自身悬停/聚焦变绿 */
.section-header.hover-text-green h2:hover,
.section-header.hover-text-green h2:focus-visible {
  color: var(--green);
}
/* 仅 section-header 的说明文字不因父容器悬停变绿 */
.section-header.hover-text-green:hover p,
.section-header.hover-text-green:focus-visible p {
  color: var(--muted);
}
/* 移除父容器对 h2 的覆盖，保留 h2:hover 规则 */
/* 列表项悬停文字变绿（合规与原则，仅单个条目） */
.hover-text-green li:hover,
.hover-text-green li:focus-visible {
  color: var(--green);
}
/* 模态框：统一风格 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 2000;
}
.modal {
  width: min(780px, 92%);
  background: var(--panel);
  border: 1px solid var(--outline);
  border-radius: 14px;
  box-shadow: 0 14px 40px var(--shadow);
  overflow: hidden;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--outline);
}
.modal-header h3 { margin: 0; color: var(--green); font-size: 20px; }
.modal-body { padding: 14px 16px; }
.modal-body p { margin: 0 0 10px; color: var(--text); }
.modal-body ul { margin: 0; padding-left: 18px; }
.modal-body li { color: var(--muted); margin: 6px 0; }
.modal-close {
  border: 1px solid var(--outline);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.modal-close:hover, .modal-close:focus-visible { border-color: var(--green); background: rgba(255, 255, 255, 0.08); transform: translateY(-1px); }

/* 浅色主题下的模态框更亮 */
[data-theme="light"] .modal {
  background: rgba(255, 255, 255, 0.90);
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.18);
}
[data-theme="light"] .modal-header h3 { color: #0a7f2f; }
[data-theme="light"] .modal-close { background: rgba(255,255,255,0.6); }
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}
/* 折叠卡片隐藏 */
.hidden { display: none !important; }
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}

/* 工具区块：分割线与布局增强 */
#toolkit .grid.three { margin-top: 14px; }
.grid.three .divider { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 8px; margin: 12px 0; }
.grid.three .divider::before, .grid.three .divider::after { content: ""; height: 1px; background: var(--outline); }
.grid.three .divider .divider-label { color: var(--muted); font-size: 14px; letter-spacing: 0.2px; }

/* 展开按钮居中，添加虚线跑马灯边框 */
#toolkit .toolkit-actions { display: flex; justify-content: center; margin-top: 22px; }
#toolkit #toolkit-toggle { position: relative; display: inline-flex; align-items: center; gap: 8px; background: transparent; border: 0; color: var(--text); font-weight: 600; padding: 6px 12px; cursor: pointer; border-radius: 10px; }
#toolkit #toolkit-toggle::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  pointer-events: none;
  /* 四边重复渐变，形成虚线边框 */
  background:
    linear-gradient(90deg, var(--green) 40%, transparent 0) 0 0 / 12px 2px repeat-x,
    linear-gradient(90deg, var(--green) 40%, transparent 0) 0 100% / 12px 2px repeat-x,
    linear-gradient(90deg, var(--green) 40%, transparent 0) 0 0 / 2px 12px repeat-y,
    linear-gradient(90deg, var(--green) 40%, transparent 0) 100% 0 / 2px 12px repeat-y;
  animation: border-marquee 1.2s linear infinite;
  opacity: 0.8;
}
@keyframes border-marquee {
  to {
    background-position: 12px 0, -12px 100%, 0 12px, 100% -12px;
  }
}
#toolkit #toolkit-toggle:hover, #toolkit #toolkit-toggle:focus-visible { color: var(--green); }
/* 切换图标动画：折叠状态水平轻微滑动，展开状态上向轻微跳动 */
#toolkit #toolkit-toggle .toggle-icon { flex: 0 0 16px; width: 16px; height: 16px; color: var(--green); animation: toggleSlide 1.2s ease-in-out infinite; }
@keyframes toggleSlide { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(2px); } }
#toolkit #toolkit-toggle[aria-expanded="true"] .toggle-icon { transform: rotate(-90deg); animation: toggleBounce 1.2s ease-in-out infinite; }
@keyframes toggleBounce { 0%, 100% { transform: rotate(-90deg) translateY(0); } 50% { transform: rotate(-90deg) translateY(-1px); } }

/* 浅色主题下的分割线对比度适配 */
:root[data-theme="light"] .grid.three .divider::before,
:root[data-theme="light"] .grid.three .divider::after { background: rgba(0,0,0,0.12); }
@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}