/* ============================================
   作品集 | Portfolio — 样式表
   ============================================ */

/* --- CSS 变量 --- */
:root {
  --bg: #0a0a0f;
  --bg-card: #141420;
  --bg-card-hover: #1a1a2e;
  --bg-modal: #111118;
  --border: #252535;
  --border-hover: #3a3a55;
  --text: #e0e0e8;
  --text-secondary: #8888a0;
  --text-muted: #5a5a70;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --tag-bg: rgba(99, 102, 241, 0.12);
  --tag-text: #a5b4fc;
  --glass-bg: rgba(20, 20, 35, 0.7);
  --glass-border: rgba(255, 255, 255, 0.06);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 12px 40px rgba(99, 102, 241, 0.15), 0 4px 16px rgba(0, 0, 0, 0.4);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 浅色主题 */
[data-theme="light"] {
  --bg: #f5f5f8;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafe;
  --bg-modal: #ffffff;
  --border: #e5e5ed;
  --border-hover: #c5c5d8;
  --text: #1a1a2e;
  --text-secondary: #6b6b80;
  --text-muted: #9a9ab0;
  --accent: #4f46e5;
  --tag-bg: rgba(79, 70, 229, 0.08);
  --tag-text: #4f46e5;
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 32px rgba(79, 70, 229, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--accent); text-decoration: none; }

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

/* --- 背景动画粒子 --- */
.bg-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* --- 头部导航 --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), border var(--transition);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.header-right { display: flex; align-items: center; gap: 8px; }

/* --- 按钮 --- */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-icon:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--bg-card-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

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

.btn-sm { padding: 6px 14px; font-size: 0.82rem; border-radius: 8px; }

/* --- 主内容 --- */
.main {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* --- Hero --- */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}

.hero-avatar { margin-bottom: 20px; }

.avatar-placeholder {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin: 0 auto;
  box-shadow: 0 8px 32px var(--accent-glow);
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #e0e0e8 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #1e1b4b 0%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto 20px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
}

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

.stat strong {
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
}

/* --- 工具栏 --- */
.toolbar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  max-width: 420px;
  width: 100%;
}

.search-box svg {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 11px 40px 11px 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
}

.search-box input::placeholder { color: var(--text-muted); }
.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-clear {
  position: absolute;
  right: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.search-clear:hover { color: var(--text); background: var(--border); }

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.tag:hover { border-color: var(--border-hover); color: var(--text); }

.tag.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tag .tag-count {
  margin-left: 4px;
  opacity: 0.6;
  font-size: 0.75rem;
}

/* --- 项目网格 --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

/* --- 项目卡片 --- */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-card);
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

.card-preview {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #1e1b4b20, #312e8120);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .card-thumb { transform: scale(1.04); }

.card-thumb-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover .card-overlay { opacity: 1; }

.card-overlay-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  font-family: inherit;
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 9px 20px;
  border-radius: 24px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.2s ease,
              box-shadow 0.2s ease,
              border-color 0.2s ease;
}

.card-overlay-btn:hover {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border-color: transparent;
  box-shadow: 0 10px 28px rgba(99, 102, 241, 0.5);
  transform: translateY(-2px) scale(1.04);
}

.card-overlay-btn:active {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
  transform: translateY(0) scale(0.94);
}

.card-overlay-btn:focus-visible {
  outline: 2px solid #a5b4fc;
  outline-offset: 3px;
}

.project-card:focus-within {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
}

.card-body { padding: 18px 20px 20px; }

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.card-tag {
  padding: 3px 10px;
  border-radius: 14px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.card-type-badge {
  position: absolute;
  top: 12px; right: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  backdrop-filter: blur(4px);
  z-index: 2;
}

/* --- 空状态 --- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 8px; font-size: 1.1rem; }
.empty-state p { margin-bottom: 20px; font-size: 0.9rem; }

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.modal {
  width: 92vw;
  max-width: 1100px;
  height: 88vh;
  background: var(--bg-modal);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  transform: scale(0.95) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-title { font-size: 1.2rem; font-weight: 700; }

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.modal-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.modal-close { flex-shrink: 0; }

.modal-body {
  flex: 1;
  position: relative;
  background: #fff;
  overflow: hidden;
}

[data-theme="light"] .modal-body { background: #f5f5f8; }

/* 手机项目预览：居中手机框布局 */
.modal-mobile .modal-body {
  display: flex;
  align-items: stretch;
  justify-content: center;
  background: #0a0a0f;
}

[data-theme="light"] .modal-mobile .modal-body {
  background: #e8e8f0;
}

.modal-mobile .modal-iframe {
  width: min(390px, 100%);
  height: 100%;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.modal-iframe {
  width: 100%;
  height: 100%;
  border: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-iframe.loaded { opacity: 1; }

.modal-loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-secondary);
  background: var(--bg-modal);
}

.modal-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--bg-modal);
}

.error-icon { font-size: 2.5rem; }

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* --- 页脚 --- */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
}

/* --- 响应式 --- */
@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .hero { padding: 40px 0 28px; }
  .hero-title { font-size: 1.6rem; }

  .modal {
    width: 100vw;
    height: 100vh;
    max-width: none;
    border-radius: 0;
  }

  .modal-header { padding: 14px 16px; }
  .modal-title { font-size: 1rem; }
}

@media (max-width: 480px) {
  .main { padding: 0 16px 60px; }
  .header-inner { padding: 0 16px; }
  .card-body { padding: 14px 16px 16px; }
}

/* 触摸设备：始终显示预览按钮（无 hover） */
@media (hover: none) {
  .card-overlay {
    opacity: 1;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.55) 55%, rgba(0, 0, 0, 0.7) 100%);
  }
}