@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&display=swap'); /* 引入中文字体用于标题 */

:root {
    --primary: #98E6D8;          /* 蒂芙尼蓝/薄荷绿 - 更清透 */
    --primary-light: #C9F0E9;    /* 浅薄荷 */
    --primary-dark: #68BFB0;     /* 深薄荷 */
    --secondary: #FFC4C8;        /* 樱花粉 */
    --secondary-light: #FFE8EA;  /* 浅樱花 */
    --secondary-dark: #FF9AA2;   /* 深粉 */
    --accent: #FEFAB4;           /* 奶黄 */
    --cream: #FFFCF7;            /* 象牙白 */
    --text: #6A7B8C;             /* 灰蓝 */
    --text-light: #9DAFBD;       /* 浅灰 */
    --white: #FFFFFF;
    --shadow: rgba(104, 191, 176, 0.15);
    --shadow-hover: rgba(104, 191, 176, 0.25);
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Quicksand', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    background-color: #f4fbf9;
    /* 多层背景组合：点阵纹理 + 梦幻光斑 */
    background-image: 
        radial-gradient(rgba(104, 191, 176, 0.2) 1.5px, transparent 1.5px),
        radial-gradient(circle at 0% 0%, rgba(255, 228, 230, 0.8) 0%, transparent 60%), 
        radial-gradient(circle at 100% 0%, rgba(209, 245, 238, 0.8) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(255, 235, 238, 0.8) 0%, transparent 60%),
        radial-gradient(circle at 0% 100%, rgba(201, 240, 233, 0.8) 0%, transparent 50%);
    background-size: 24px 24px, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
    background-attachment: fixed;
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
    color: var(--text);
}

/* ========== 浮动气泡动画 (优化版) ========== */
.floating-bubbles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.bubble {
    position: absolute;
    font-size: 24px;
    filter: blur(1px);
    animation: float 20s infinite linear;
}

.bubble:nth-child(1) { left: 10%; bottom: -100px; animation-duration: 25s; animation-delay: 0s; font-size: 30px; opacity: 0.6; }
.bubble:nth-child(2) { left: 30%; bottom: -100px; animation-duration: 20s; animation-delay: 5s; font-size: 20px; opacity: 0.4; }
.bubble:nth-child(3) { left: 50%; bottom: -100px; animation-duration: 28s; animation-delay: 2s; font-size: 35px; opacity: 0.5; }
.bubble:nth-child(4) { left: 70%; bottom: -100px; animation-duration: 22s; animation-delay: 8s; font-size: 25px; opacity: 0.6; }
.bubble:nth-child(5) { left: 85%; bottom: -100px; animation-duration: 30s; animation-delay: 15s; font-size: 28px; opacity: 0.4; }
.bubble:nth-child(6) { left: 5%; bottom: -100px; animation-duration: 35s; animation-delay: 10s; font-size: 18px; opacity: 0.3; }

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); opacity: 0; }
    10% { opacity: 0.6; }
    80% { opacity: 0.6; }
    100% { transform: translateY(-120vh) rotate(360deg); opacity: 0; }
}

/* ========== 主容器 ========== */
.container {
    max-width: 1000px;
    margin: 20px auto;
    /* 更加通透的磨砂玻璃效果，带一点点暖调 */
    background: rgba(255, 255, 255, 0.85);
    background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 245, 247, 0.6) 100%);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 30px;
    box-shadow: 0 20px 80px rgba(104, 191, 176, 0.15);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* ========== 头部区域 (全新重构) ========== */
.header {
    /* 头部增加微弱的渐变，不再是死白 */
    background: linear-gradient(180deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.6) 100%);
    padding: 50px 30px 40px;
    text-align: center;
    position: relative;
    border-bottom: 2px dashed rgba(152, 230, 216, 0.3);
}

.brand-badge {
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--secondary);
    color: var(--white);
    padding: 8px 40px;
    transform: rotate(45deg);
    font-size: 0.85em;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(255, 182, 185, 0.4);
    letter-spacing: 1px;
    z-index: 10;
}

.heart-icon {
    display: inline-block;
    animation: heartBeat 1.5s infinite;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
}

.title-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header h1 {
    /* 恢复为 Quicksand 字体，更圆润可爱，不再强制使用毛笔字 */
    font-family: 'Quicksand', 'Microsoft YaHei', sans-serif;
    font-weight: 700;
    font-size: 3em;
    color: var(--primary-dark);
    text-shadow: 2px 2px 0px var(--primary-light);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.1em;
    color: var(--secondary-dark);
    font-weight: 600;
    letter-spacing: 3px;
    position: relative;
    display: inline-block;
}

.fish-icon {
    font-size: 2.8em;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.decoration-left {
    animation: swimLeft 4s infinite ease-in-out;
}

.decoration-right {
    animation: swimRight 4s infinite ease-in-out;
    transform: scaleX(-1);
}

@keyframes swimLeft {
    0%, 100% { transform: translateY(0) rotate(-5deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

@keyframes swimRight {
    0%, 100% { transform: scaleX(-1) translateY(0) rotate(5deg); }
    50% { transform: scaleX(-1) translateY(-10px) rotate(-5deg); }
}

.tagline {
    font-size: 0.9em;
    color: var(--text-light);
    margin-top: 15px;
    background: var(--cream);
    padding: 8px 25px;
    border-radius: 50px;
    display: inline-block;
    border: 1px solid var(--primary-light);
}

/* ========== 控制面板 ========== */
.control-panel {
    /* 面板背景调整为更淡的暖色，增加层次 */
    background: rgba(255, 252, 247, 0.4);
    padding: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    align-items: start;
    border-bottom: 2px dashed rgba(152, 230, 216, 0.3);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control-group label {
    font-weight: 700;
    color: var(--text);
    font-size: 0.95em;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.5px;
}

.label-icon {
    font-size: 1.2em;
    filter: drop-shadow(1px 1px 0px rgba(0,0,0,0.1));
}

/* 文件上传区 */
.upload-area {
    grid-column: span 1;
}

.control-group input[type="file"] {
    width: 100%;
    padding: 15px;
    border: 2px dashed var(--primary);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--white);
    color: var(--text);
    font-size: 0.9em;
}

.control-group input[type="file"]:hover {
    border-color: var(--primary-dark);
    background: var(--cream);
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 5px 15px rgba(110, 197, 184, 0.15);
}

.file-hint {
    font-size: 0.8em;
    color: var(--text-light);
    margin-left: 5px;
    font-style: italic;
}

/* 滑块容器 */
.slider-container {
    display: flex;
    gap: 15px;
    align-items: center;
    background: var(--white);
    padding: 10px 15px;
    border-radius: 20px;
    border: 1px solid var(--primary-light);
}

.slider-label {
    font-size: 0.8em;
    color: var(--text-light);
    font-weight: 600;
    white-space: nowrap;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 10px;
    border-radius: 5px;
    background: linear-gradient(90deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--white);
    border: 4px solid var(--secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    border-color: var(--secondary-dark);
}

.value-display {
    min-width: 40px;
    text-align: center;
    font-weight: 800;
    color: var(--primary-dark);
    font-size: 1em;
}

/* 下拉选择框 */
select {
    width: 100%;
    padding: 12px 20px;
    border-radius: 15px;
    border: 2px solid var(--primary-light);
    background: var(--white);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236EC5B8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

select:hover, select:focus {
    border-color: var(--primary);
    box-shadow: 0 5px 15px rgba(110, 197, 184, 0.15);
    transform: translateY(-1px);
}

/* 复选框组 */
.checkbox-group {
    gap: 15px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    padding: 10px 15px;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-weight: 600;
    color: var(--text);
    background: rgba(255,255,255,0.5);
    border: 1px solid transparent;
}

.checkbox-label:hover {
    background: var(--white);
    border-color: var(--primary-light);
    transform: translateX(5px);
}

.checkbox-custom {
    width: 22px;
    height: 22px;
    border: 2px solid var(--primary-dark);
    border-radius: 8px; /* Slightly more rounded */
    position: relative;
    transition: all 0.3s ease;
    background: var(--white);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--primary);
    border-color: var(--primary);
    transform: rotate(5deg) scale(1.1);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 16px;
    font-weight: bold;
    line-height: 1;
}

/* 按钮组 */
.button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
    grid-column: 1 / -1;
    justify-content: center;
    padding-top: 15px;
    border-top: 1px solid rgba(0,0,0,0.03);
    margin-top: 10px;
}

.btn {
    padding: 14px 30px;
    border: none;
    border-radius: 30px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Bouncy effect */
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

/* Jelly Button Effect */
.btn:active:not(:disabled) {
    transform: scale(0.95);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 0 #3da090, 0 10px 10px rgba(0,0,0,0.1); /* 3D effect style shadow */
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-4px);
    box-shadow: 0 8px 0 #3da090, 0 15px 20px rgba(110, 197, 184, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: 0 2px 0 #3da090, 0 5px 5px rgba(0,0,0,0.1);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-dark);
    border: 2px solid var(--primary);
    box-shadow: 0 4px 0 var(--primary-light), 0 5px 10px rgba(0,0,0,0.05);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 8px 0 var(--primary-light), 0 15px 15px rgba(0,0,0,0.05);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: 0 2px 0 var(--primary-light);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #e0e0e0;
    color: #999;
    box-shadow: none !important;
    border-color: transparent;
    transform: none !important;
}

/* ========== 主内容区 ========== */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    padding: 40px;
    /* 增加非常淡的薄荷绿渐变 */
    background: linear-gradient(180deg, rgba(240, 252, 250, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%);
}

.canvas-section {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.canvas-section h2 {
    font-size: 1.25em;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 12px;
    border-bottom: 2px dashed var(--secondary-light);
    font-weight: 700;
}

.section-icon {
    font-size: 1.3em;
    filter: drop-shadow(0 2px 2px rgba(0,0,0,0.1));
}

.canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%), 
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%), 
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px; /* Checkerboard pattern */
    border: 8px solid var(--white);
    border-radius: 20px;
    overflow: hidden; /* Changed from auto to hidden for frame effect, but inner scroll might be needed? Usually canvas scales. */
    overflow: auto; /* Keep auto for scrolling if needed */
    position: relative;
    min-height: 350px;
    box-shadow: 
        0 0 0 4px var(--primary-light), /* Double border effect */
        inset 0 0 20px rgba(0,0,0,0.05),
        0 10px 25px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.canvas-container:hover {
    box-shadow: 
        0 0 0 4px var(--primary),
        inset 0 0 20px rgba(0,0,0,0.05),
        0 15px 35px rgba(110, 197, 184, 0.2);
    transform: translateY(-2px);
}

.canvas-container canvas {
    margin: auto;
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    cursor: zoom-in;
    transition: max-width 0.3s ease, max-height 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.canvas-container canvas.zoomed {
    max-width: none;
    max-height: none;
    cursor: zoom-out;
}

.no-image-msg {
    color: var(--text-light);
    font-size: 1.1em;
    position: absolute;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    font-weight: 600;
}

.empty-icon {
    font-size: 4em;
    opacity: 0.5;
    animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ========== 色板区域 ========== */
.palette-section {
    padding: 30px 40px;
    /* 色板区域使用淡粉色渐变背景 */
    background: linear-gradient(180deg, rgba(255, 248, 248, 0.4) 0%, rgba(255, 255, 255, 0.6) 100%);
    border-top: 2px dashed rgba(152, 230, 216, 0.3);
}

.palette-section h2 {
    font-size: 1.25em;
    color: var(--text);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 15px;
    border-bottom: 2px dashed var(--secondary-light);
    font-weight: 700;
}

.palette-info {
    margin-bottom: 25px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.info-card {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--white);
    padding: 15px 25px;
    border-radius: 50px;
    border: 2px solid var(--primary-light);
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
    transition: transform 0.3s ease;
}

.info-card:hover {
    transform: translateY(-3px) rotate(-1deg);
    border-color: var(--primary);
}

.info-label {
    font-size: 0.95em;
    color: var(--text);
    font-weight: 600;
}

.info-value {
    font-size: 1.6em;
    font-weight: 800;
    color: var(--secondary-dark); /* Pink numbers for contrast */
}

.info-unit {
    font-size: 0.9em;
    color: var(--text-light);
    font-weight: 600;
    margin-top: 4px;
}

.palette-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: flex-start;
}

.color-card {
    display: flex;
    flex-direction: column;
    width: 70px;
    padding: 8px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.05); /* Subtle border */
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    align-items: flex-start;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.color-card:hover {
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    z-index: 10;
}

.color-card-square {
    width: 100%;
    aspect-ratio: 1;
    border: 3px solid var(--white); /* White border inside */
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 10px;
    border-radius: 8px;
}

.color-card-details {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center; /* Center text */
    text-align: center;
    line-height: 1.2;
}

.color-card-small-id {
    font-size: 10px;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 2px;
}

.color-card-big-id {
    font-size: 14px;
    color: var(--text);
    font-weight: 800;
    margin-bottom: 4px;
}

.color-card-hex-row {
    font-size: 9px;
    color: #ccc;
    font-family: monospace;
    display: none; /* Hide hex to make it cleaner */
}

.color-card-count-row {
    font-size: 10px;
    color: var(--secondary-dark);
    font-weight: 700;
    margin-top: 2px;
    background: var(--secondary-light);
    padding: 2px 6px;
    border-radius: 10px;
}

/* ========== 页脚 (全新) ========== */
.footer {
    background: transparent;
    padding: 20px;
    text-align: center;
    border-top: none;
    margin-top: 20px;
}

.footer-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: var(--primary-dark);
    font-family: 'Comic Sans MS', 'Chalkboard SE', sans-serif;
    margin-bottom: 5px;
    opacity: 0.6;
}

.little-fish {
    font-size: 1.5em;
    animation: swim 5s infinite ease-in-out;
}

.footer-content p {
    color: var(--text-light);
    font-size: 0.85em;
    margin-bottom: 15px;
}

.copyright-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9em;
    color: var(--text);
    background: rgba(255, 255, 255, 0.6);
    padding: 10px 25px;
    border-radius: 50px;
    display: inline-flex;
    box-shadow: 0 5px 20px rgba(104, 191, 176, 0.1);
}

.copyright-text {
    font-weight: 600;
}

.divider {
    font-style: italic;
    font-size: 0.8em;
    opacity: 0.7;
}

.heart-beat {
    display: inline-block;
    color: #FF5A5F;
    animation: heartPulse 1.2s infinite;
    font-size: 1.2em;
}

@keyframes heartPulse {
    0% { transform: scale(1); }
    15% { transform: scale(1.3); }
    30% { transform: scale(1); }
    45% { transform: scale(1.3); }
    60% { transform: scale(1); }
    100% { transform: scale(1); }
}

.name-highlight {
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 700;
    transition: all 0.3s ease;
}

.name-highlight.su {
    color: var(--secondary-dark);
    background: var(--secondary-light);
    border: 1px solid var(--secondary);
}

.name-highlight.zhu {
    color: var(--primary-dark);
    background: var(--primary-light);
    border: 1px solid var(--primary);
}

.copyright-wrapper:hover .name-highlight.su {
    transform: rotate(-3deg) scale(1.1);
}

.copyright-wrapper:hover .name-highlight.zhu {
    transform: rotate(3deg) scale(1.1);
}

/* ========== 响应式设计 ========== */
@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
        padding: 20px;
    }

    .header h1 {
        font-size: 2em;
    }

    .fish-icon {
        font-size: 2em;
    }

    .brand-badge {
        right: -30px;
        font-size: 0.75em;
        padding: 5px 35px;
    }
}

@media (max-width: 600px) {
    .container {
        margin: 10px;
        border-radius: 20px;
    }
    
    .header {
        padding: 30px 15px;
    }

    .header h1 {
        font-size: 1.8em;
    }

    .logo-area {
        flex-wrap: wrap;
    }

    .control-panel {
        padding: 20px;
    }
    
    .button-group {
        flex-direction: column;
        width: 100%;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
    }
    
    .copyright-wrapper {
        flex-direction: column;
        gap: 5px;
        padding: 15px;
        border-radius: 20px;
    }
    
    .divider, .heart-beat {
        display: none;
    }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--cream);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ========== 加载动画 ========== */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading {
    animation: spin 1s linear infinite;
}

/* ========== 选中状态 ========== */
::selection {
    background: var(--primary-light);
    color: var(--text);
}