:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: rgba(255,255,255,0.05);
    --bg-card: rgba(255,255,255,0.08);
    --bg-card-hover: rgba(255,255,255,0.12);
    --text-primary: #ffffff;
    --text-secondary: rgba(255,255,255,0.7);
    --text-muted: rgba(255,255,255,0.5);
    --border-color: rgba(255,255,255,0.1);
    --accent-color: #00BCD4;
    --shadow: 0 8px 32px rgba(0,0,0,0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: rgba(255,255,255,0.8);
    --bg-card: rgba(255,255,255,0.9);
    --bg-card-hover: rgba(255,255,255,1);
    --text-primary: #1a1a2e;
    --text-secondary: rgba(26,26,46,0.7);
    --text-muted: rgba(26,26,46,0.5);
    --border-color: rgba(0,0,0,0.08);
    --shadow: 0 8px 32px rgba(0,0,0,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
}
.bg-animation {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; overflow: hidden;
}
.bg-animation .blob {
    position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}
.blob-1 { width: 600px; height: 600px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); top: -200px; right: -100px; animation-delay: 0s; }
.blob-2 { width: 500px; height: 500px; background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); bottom: -150px; left: -100px; animation-delay: -5s; }
.blob-3 { width: 400px; height: 400px; background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); top: 50%; left: 50%; animation-delay: -10s; }
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}
.header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 40px; position: sticky; top: 0; z-index: 100;
    background: rgba(26, 26, 46, 0.8); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color); transition: var(--transition);
}
[data-theme="light"] .header { background: rgba(240, 242, 245, 0.8); }
.logo { display: flex; align-items: center; gap: 12px; font-size: 24px; font-weight: 700; color: var(--text-primary); text-decoration: none; }
.logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, #00BCD4, #2196F3); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: white; font-size: 20px; }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-btn { width: 40px; height: 40px; border-radius: 12px; border: 1px solid var(--border-color); background: var(--bg-secondary); color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); text-decoration: none; }
.header-btn:hover { background: var(--bg-card-hover); color: var(--text-primary); transform: translateY(-2px); }
.search-section { display: flex; justify-content: center; padding: 40px 20px 20px; }
.search-box { position: relative; width: 100%; max-width: 600px; }
.search-input-wrapper { display: flex; align-items: center; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 4px; box-shadow: var(--shadow); transition: var(--transition); }
.search-input-wrapper:focus-within { border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.2); }
.search-engine-select { display: flex; align-items: center; gap: 8px; padding: 0 16px; border-right: 1px solid var(--border-color); cursor: pointer; color: var(--text-secondary); font-size: 14px; white-space: nowrap; position: relative; user-select: none; }
.search-engine-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px;
    min-width: 160px;
    box-shadow: var(--shadow);
    display: none;
    z-index: 9999;
}
.search-engine-dropdown.show { display: block; }
.search-engine-option { padding: 10px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--text-secondary); transition: var(--transition); display: flex; align-items: center; gap: 10px; }
.search-engine-option:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.search-engine-option.active { background: rgba(0, 188, 212, 0.15); color: var(--accent-color); }
.search-input { flex: 1; border: none; background: transparent; padding: 12px 16px; color: var(--text-primary); font-size: 16px; outline: none; }
.search-input::placeholder { color: var(--text-muted); }
.search-btn { width: 44px; height: 44px; border-radius: 12px; border: none; background: linear-gradient(135deg, #00BCD4, #2196F3); color: white; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 16px; transition: var(--transition); }
.search-btn:hover { transform: scale(1.05); box-shadow: 0 4px 15px rgba(0, 188, 212, 0.4); }
.category-section { padding: 20px 40px; position: sticky; top: 81px; z-index: 90; background: rgba(26, 26, 46, 0.7); backdrop-filter: blur(20px); transition: var(--transition); }
[data-theme="light"] .category-section { background: rgba(240, 242, 245, 0.7); }
.category-tabs { display: flex; gap: 12px; overflow-x: auto; padding: 4px; scrollbar-width: none; }
.category-tabs::-webkit-scrollbar { display: none; }
.category-tab { padding: 10px 24px; border-radius: 24px; border: 1px solid var(--border-color); background: var(--bg-secondary); color: var(--text-secondary); cursor: pointer; white-space: nowrap; font-size: 14px; font-weight: 500; transition: var(--transition); display: flex; align-items: center; gap: 8px; }
.category-tab:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.category-tab.active { background: linear-gradient(135deg, #00BCD4, #2196F3); color: white; border-color: transparent; box-shadow: 0 4px 15px rgba(0, 188, 212, 0.3); }
.content { padding: 20px 40px 30px; max-width: 1400px; width: 100%; margin-left: auto; margin-right: auto; flex: 1; min-height: 0; }
.group-section { margin-bottom: 40px; animation: fadeInUp 0.5s ease-out; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.group-title { font-size: 18px; font-weight: 600; margin-bottom: 20px; color: var(--text-primary); display: flex; align-items: center; gap: 10px; }
.group-title::before { content: ''; width: 4px; height: 20px; background: linear-gradient(180deg, #00BCD4, #2196F3); border-radius: 2px; }
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.card {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--card-color, var(--accent-color));
    opacity: 0;
    transition: var(--transition);
}
.card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: transparent;
}
.card:hover::before { opacity: 1; }
.card-icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: 20px;
    overflow: hidden;
    background: var(--card-color, var(--accent-color));
}
.card-icon img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.card-icon i { color: white; font-size: 18px; }
.card-info { flex: 1; min-width: 0; }
.card-title { font-size: 14px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-desc { font-size: 12px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.footer { text-align: center; padding: 16px; color: var(--text-muted); font-size: 12px; border-top: 1px solid var(--border-color); margin-top: auto; }
.time-display { text-align: center; margin-bottom: 10px; }
.time-display .time { font-size: 48px; font-weight: 700; background: linear-gradient(135deg, #00BCD4, #2196F3); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
.time-display .date { font-size: 16px; color: var(--text-muted); margin-top: 4px; }
.toast-container { position: fixed; bottom: 30px; right: 30px; z-index: 400; display: flex; flex-direction: column; gap: 10px; }
.toast { padding: 14px 24px; border-radius: 12px; background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-primary); font-size: 14px; box-shadow: var(--shadow); animation: toastIn 0.3s ease-out; display: flex; align-items: center; gap: 10px; }
.toast.success { border-left: 4px solid #4CAF50; }
.toast.error { border-left: 4px solid #f5576c; }
@keyframes toastIn { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
@media (max-width: 768px) {
    .header { padding: 15px 20px; }
    .content, .category-section { padding-left: 20px; padding-right: 20px; }
    .cards-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
    .time-display .time { font-size: 36px; }
}

/* ===== Brand Logo (SVG) — 放大涟漪 hover 效果 ===== */
.logo-svg {
    overflow: visible;        /* 缩放溢出不被裁剪 */
    cursor: pointer;
    color: #2196F3;           /* 环色，对应原站 #FFC107 嘴巴浅蓝色：#40C8F0 玫粉色（右边脸蛋）：#F24698 --ink */
}
.logo-svg .ring {
    transform-box: fill-box;
    transform-origin: 50% 50%;
}
.logo-svg:hover .ring-center,
.logo-svg.is-hover .ring-center { animation: pulse-strong .5s ease-in-out; }
.logo-svg:hover .ring-inner,
.logo-svg.is-hover .ring-inner  { animation: pulse .5s ease-in-out .15s; }
.logo-svg:hover .ring-outer,
.logo-svg.is-hover .ring-outer  { animation: pulse .5s ease-in-out .3s; }
@keyframes pulse-strong {
    0%   { transform: scale(1);    opacity: 1; }
    50%  { transform: scale(1.15); opacity: .75; }
    100% { transform: scale(1);    opacity: 1; }
}
@keyframes pulse {
    0%   { transform: scale(1);   opacity: 1; }
    50%  { transform: scale(1.1); opacity: .75; }
    100% { transform: scale(1);   opacity: 1; }
}