/* ========== 基础 ========== */
:root {
  --bg: #06060f;
  --text: #f2f2fa;
  --muted: #a6a6c4;
  --panel-bg: rgba(14, 14, 30, 0.82);
  --border: rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  overflow: hidden;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

#bg3d {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#bg3d.dragging { cursor: grabbing; }
#bg3d.hovering { cursor: pointer; }

/* 暗角氛围 */
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 5, 0.55) 100%);
  z-index: 1;
}

/* 面板打开时的压暗层 */
.dim {
  position: fixed;
  inset: 0;
  background: rgba(3, 3, 12, 0.55);
  backdrop-filter: blur(3px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s;
  z-index: 5;
}
.dim.show { opacity: 1; pointer-events: auto; }

/* ========== 品牌 ========== */
.brand {
  position: fixed;
  top: 22px;
  left: 28px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  pointer-events: none;
}
.brand strong {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 2px;
}
.brand span {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 1px;
}

/* ========== 提示 ========== */
.hint {
  position: fixed;
  top: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  font-size: 0.85rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 20px;
  backdrop-filter: blur(10px);
  animation: hintFloat 3s ease-in-out infinite;
  transition: opacity 0.6s;
  white-space: nowrap;
}
.hint.fade { opacity: 0; }
@keyframes hintFloat {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-6px); }
}

/* ========== 底部导航 ========== */
.face-nav {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 94vw;
}

.face-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}
.face-chip i {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--c);
  box-shadow: 0 0 8px var(--c);
}
.face-chip:hover {
  transform: translateY(-3px);
  border-color: var(--c);
  background: rgba(255, 255, 255, 0.1);
}
.face-chip.active {
  border-color: var(--c);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 16px color-mix(in srgb, var(--c) 40%, transparent);
}

/* ========== 返回按钮 ========== */
.back-btn {
  position: fixed;
  top: 24px;
  right: 28px;
  z-index: 20;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 20px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.4s, transform 0.4s, background 0.2s;
}
.back-btn.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-btn:hover { background: rgba(255, 255, 255, 0.16); }

/* ========== 内容面板 ========== */
.panel {
  --accent: #2f9bff;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -46%) scale(0.94);
  z-index: 15;
  width: min(680px, 92vw);
  max-height: 76vh;
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 22px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.2),
    0 0 44px color-mix(in srgb, var(--accent) 30%, transparent),
    0 30px 80px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.panel.open {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.panel[data-panel="about"]      { --accent: #2f9bff; }
.panel[data-panel="skills"]     { --accent: #ff3b55; }
.panel[data-panel="experience"] { --accent: #ff9500; }
.panel[data-panel="projects"]   { --accent: #ffd60a; }
.panel[data-panel="education"]  { --accent: #34e27a; }
.panel[data-panel="contact"]    { --accent: #bf5af2; }

.panel h2 {
  font-size: 1.5rem;
  font-weight: 800;
  padding: 24px 30px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.panel h2::before {
  content: "";
  width: 10px;
  height: 26px;
  border-radius: 5px;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}

.panel-body {
  padding: 22px 30px 30px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}
.panel-body::-webkit-scrollbar { width: 6px; }
.panel-body::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ---------- 面板内部通用 ---------- */
.text { color: var(--muted); font-size: 0.95rem; }
.text strong, .proj strong { color: var(--text); }
.role { color: var(--accent); font-weight: 700; }
.meta { color: var(--muted); font-size: 0.86rem; }
.date {
  color: var(--muted);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  white-space: nowrap;
}

.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tags span {
  font-size: 0.78rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 3px 11px;
  border-radius: 999px;
}

/* 关于我 */
.about-head { display: flex; align-items: center; gap: 18px; margin-bottom: 18px; }
.avatar {
  width: 74px;
  height: 74px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  font-size: 2.2rem;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 40%, #fff));
  box-shadow: 0 0 26px color-mix(in srgb, var(--accent) 50%, transparent);
  flex-shrink: 0;
}
.about-head h3 { font-size: 1.3rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 20px;
}
.stat {
  text-align: center;
  padding: 13px 6px;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
}
.stat strong { display: block; font-size: 1.12rem; color: var(--accent); }
.stat span { color: var(--muted); font-size: 0.76rem; }

/* 技能 */
.skill-group { margin-bottom: 18px; }
.skill-group:last-child { margin-bottom: 0; }
.skill-group h4 { font-size: 1rem; margin-bottom: 9px; }

/* 实习 */
.exp-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.exp-top h3 { font-size: 1.25rem; }

/* 项目 */
.proj {
  padding: 16px 18px;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  margin-bottom: 14px;
}
.proj:last-child { margin-bottom: 0; }
.proj h3 { font-size: 1.04rem; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cat { font-size: 0.74rem; color: var(--muted); font-weight: 400; }
.proj ul { list-style: none; margin-bottom: 10px; }
.proj li {
  color: var(--muted);
  font-size: 0.88rem;
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}
.proj li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }

/* 教育 */
.edu-box { margin-bottom: 20px; }
.edu-box h3 { font-size: 1.2rem; margin-bottom: 4px; }
.edu-box .meta { margin-bottom: 10px; }
.edu-box .text { margin-bottom: 14px; }
.awards p { color: var(--muted); margin-bottom: 10px; }

/* 联系 */
.intent { font-size: 1.08rem; margin-bottom: 4px; }
.intent strong { color: var(--accent); }
.contact-list { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, border-color 0.2s;
}
.contact-item:hover { transform: translateX(5px); border-color: var(--accent); }
.contact-item > span { font-size: 1.4rem; }
.contact-item small { display: block; color: var(--muted); font-size: 0.78rem; }
.contact-item strong { font-size: 1rem; word-break: break-all; }

/* ========== 响应式 ========== */
@media (max-width: 640px) {
  .brand { top: 16px; left: 18px; }
  .hint { font-size: 0.75rem; padding: 6px 14px; top: 18px; left: auto; right: 16px; transform: none; }
  .back-btn { top: auto; bottom: 86px; right: 16px; }
  .face-nav { bottom: 16px; gap: 7px; }
  .face-chip { font-size: 0.76rem; padding: 6px 12px; }
  .panel { max-height: 70vh; }
  .panel h2 { padding: 18px 20px 12px; font-size: 1.25rem; }
  .panel-body { padding: 16px 20px 24px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}