:root {
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #a78bfa;
    --primary-bg: #ede9fe;
    --secondary: #8b5cf6;
    --accent: #6366f1;
    --surface: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.35);
    --surface-glass-alt: rgba(255, 255, 255, 0.60);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-hint: #888;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.10);
    --bg-solid: #f8faff;
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --navbar-height: 64px;

    --primary-rgb: 124, 58, 237;
    --secondary-rgb: 139, 92, 246;
    --accent-rgb: 99, 102, 241;
    --surface-rgb: 255, 255, 255;
    --text-primary-rgb: 26, 26, 46;
    --btn-glass-opacity: 0.25;
    --btn-glass-blur: 12px;

    --bilibili-pink: #3b82f6;
    --bilibili-blue: #2563eb;
    --fans-medal-bg: rgba(59, 130, 246, 0.12);
    --follower-change-up: #22c55e;
    --follower-change-down: #ef4444;

    --btn-bg: rgba(255, 255, 255, 0.70);
    --btn-border: rgba(0, 0, 0, 0.12);
    --btn-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    --corner-btn-bg: rgba(255, 255, 255, 0.80);
    --corner-btn-border: rgba(0, 0, 0, 0.10);
    --corner-btn-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

body.dark {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --primary-light: #a78bfa;
    --primary-bg: #2d1b4e;
    --secondary: #a78bfa;
    --accent: #818cf8;
    --surface: #12121f;
    --surface-glass: rgba(18, 18, 33, 0.35);
    --surface-glass-alt: rgba(18, 18, 33, 0.60);
    --text-primary: #f0f0ff;
    --text-secondary: #c8c8e0;
    --text-hint: #9898b8;
    --border: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.20);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.7);
    --bg-solid: #0a0a14;

    --primary-rgb: 139, 92, 246;
    --secondary-rgb: 167, 139, 250;
    --accent-rgb: 129, 140, 248;
    --surface-rgb: 18, 18, 33;
    --text-primary-rgb: 240, 240, 255;
    --fans-medal-bg: rgba(59, 130, 246, 0.2);

    --btn-bg: rgba(18, 18, 33, 0.70);
    --btn-border: rgba(255, 255, 255, 0.15);
    --btn-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    --corner-btn-bg: rgba(18, 18, 33, 0.80);
    --corner-btn-border: rgba(255, 255, 255, 0.12);
    --corner-btn-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font);
    background-color: var(--bg-solid);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color 0.5s ease, color 0.3s ease;
    position: relative;
    background-image: none !important;
}

#bg-blur-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: blur(16px);
    transform: scale(1.1);
    transition: background-image 0.8s ease;
    pointer-events: none;
}

#app-loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    font-family: var(--font);
    background: var(--surface-glass-alt);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    transition: opacity 0.5s ease, visibility 0.5s ease;
    opacity: 1;
    visibility: visible;
}

#app-loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-card {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: var(--surface-glass);
    border: 1px solid var(--border);
    border-radius: clamp(16px, 4vw, 20px);
    padding: clamp(24px, 6vw, 40px) clamp(20px, 5vw, 32px);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
    max-width: clamp(260px, 80vw, 320px);
}

.loading-avatar {
    width: clamp(50px, 12vw, 68px);
    height: clamp(50px, 12vw, 68px);
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: clamp(16px, 4vw, 20px);
    border: 2px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    background: rgba(var(--surface-rgb), 0.3);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.loading-spinner {
    width: clamp(32px, 8vw, 40px);
    height: clamp(32px, 8vw, 40px);
    margin-bottom: clamp(12px, 3vw, 16px);
}

.loading-spinner svg {
    width: 100%;
    height: 100%;
    animation: app-loading-rotate 1.4s linear infinite;
}

.loading-title {
    font-size: clamp(16px, 4vw, 18px);
    font-weight: 500;
    margin-bottom: clamp(4px, 1vw, 6px);
    color: var(--primary);
}

.loading-subtitle {
    font-size: clamp(12px, 3vw, 13px);
    opacity: 0.7;
    color: var(--text-hint);
}

.loading-progress {
    width: 100%;
    height: 6px;
    background: rgba(128, 128, 128, 0.15);
    border-radius: 10px;
    overflow: hidden;
    margin-top: 16px;
}

.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    width: 0%;
    border-radius: 10px;
    transition: width 0.5s ease;
}

@keyframes app-loading-rotate {
    0% { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}

@keyframes app-loading-dash {
    0% { stroke-dasharray: 1px, 200px; stroke-dashoffset: 0px; }
    50% { stroke-dasharray: 100px, 200px; stroke-dashoffset: -15px; }
    100% { stroke-dasharray: 100px, 200px; stroke-dashoffset: -125px; }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
}

@keyframes number-pop {
    0% { transform: scale(1); }
    30% { transform: scale(1.15); color: var(--bilibili-pink); }
    100% { transform: scale(1); }
}

.number-animate {
    animation: number-pop 0.5s ease-out;
}

#app {
    position: relative;
    z-index: 1;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

#app.visible {
    opacity: 1;
    transform: translateY(0);
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: var(--surface-glass-alt);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    padding: 0 clamp(16px, 4vw, 40px);
    transition: background 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background: var(--surface-glass-alt);
}

.navbar-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    white-space: nowrap;
}

.navbar-brand span {
    text-shadow: 0 1px 4px rgba(255,255,255,0.6);
}

.brand-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(var(--surface-rgb), 0.3);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
}

.brand-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
    flex-wrap: wrap;
}

.navbar-links a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
    backdrop-filter: blur(8px);
    background: rgba(var(--surface-rgb), var(--btn-glass-opacity));
}

.navbar-links a:hover,
.navbar-links a.active {
    color: var(--primary);
    background: rgba(var(--primary-rgb), 0.2);
}

.navbar-menu-btn {
    display: none;
    background: rgba(var(--surface-rgb), var(--btn-glass-opacity));
    backdrop-filter: blur(var(--btn-glass-blur));
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    color: var(--text-primary);
    transition: var(--transition);
}

.navbar-menu-btn:hover {
    background: rgba(var(--primary-rgb), 0.15);
}

.navbar-menu-btn svg {
    width: 24px;
    height: 24px;
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(16px, 4vw, 32px) clamp(16px, 4vw, 32px) clamp(40px, 8vw, 60px);
}

.hero-section {
    display: flex;
    align-items: center;
    gap: clamp(20px, 5vw, 40px);
    padding: clamp(20px, 5vw, 40px);
    background: var(--surface-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: clamp(20px, 5vw, 32px);
    flex-wrap: wrap;
    transition: background 0.3s, box-shadow 0.3s;
}

.hero-section:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.hero-avatar {
    width: clamp(80px, 18vw, 130px);
    height: clamp(80px, 18vw, 130px);
    border-radius: 50%;
    flex-shrink: 0;
    background: rgba(var(--surface-rgb), 0.25);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(36px, 8vw, 56px);
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.hero-avatar:hover {
    transform: scale(1.05);
}

.hero-info {
    flex: 1;
    min-width: 200px;
}

.hero-info h1 {
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.hero-stats {
    display: flex;
    gap: clamp(12px, 3vw, 24px);
    flex-wrap: wrap;
    align-items: flex-start;
}

.hero-stat {
    text-align: center;
    position: relative;
}

.hero-stat .stat-num {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    transition: color 0.3s;
}

.hero-stat .stat-label {
    font-size: 0.78rem;
    color: var(--text-hint);
}

.hero-stat.bilibili-stat .stat-num {
    color: var(--bilibili-pink);
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: center;
}

.hero-stat.bilibili-stat .stat-num .bili-icon {
    font-size: 1rem;
    color: var(--bilibili-pink);
}

.hero-stat .follower-change {
    font-size: 0.7rem;
    font-weight: 600;
    display: inline-block;
    margin-left: 2px;
    opacity: 0;
    transition: opacity 0.4s;
}

.hero-stat .follower-change.show {
    opacity: 1;
}

.hero-stat .follower-change.up {
    color: var(--follower-change-up);
}

.hero-stat .follower-change.down {
    color: var(--follower-change-down);
}

.fans-medal-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--fans-medal-bg);
    border: 1px solid rgba(59, 130, 246, 0.3);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bilibili-pink);
    backdrop-filter: blur(6px);
    transition: var(--transition);
    cursor: default;
    white-space: nowrap;
}

.fans-medal-badge .medal-icon {
    font-size: 1rem;
}

.fans-medal-badge.pulse {
    animation: pulse-glow 1.5s ease-out;
}

.bilibili-info-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.bilibili-refresh-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    border-radius: 16px;
    font-size: 0.72rem;
    cursor: pointer;
    border: 1px solid rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.1);
    color: var(--bilibili-pink);
    transition: var(--transition);
    backdrop-filter: blur(6px);
    font-family: var(--font);
    white-space: nowrap;
}

.bilibili-refresh-btn:hover {
    background: rgba(59, 130, 246, 0.22);
    border-color: rgba(59, 130, 246, 0.5);
}

.bilibili-refresh-btn.spinning .fa-sync-alt {
    animation: app-loading-rotate 0.8s linear infinite;
}

.bilibili-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 2px;
    flex-shrink: 0;
}

.bilibili-status-dot.online {
    background: #4caf50;
    box-shadow: 0 0 6px #4caf50;
}

.bilibili-status-dot.offline {
    background: #9e9e9e;
}

.bilibili-status-dot.error {
    background: #ff9800;
    box-shadow: 0 0 6px #ff9800;
}

.live-status-text {
    font-size: 0.75rem;
    font-weight: 500;
}

.live-status-text.live {
    color: #4caf50;
}

.live-status-text.off {
    color: #9e9e9e;
}

.quick-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: clamp(16px, 4vw, 20px);
}

/* ========== 按钮统一样式（恢复玻璃态透明度） ========== */
.action-btn,
.filter-tag,
.random-btn,
.btn {
    background: var(--btn-bg);
    backdrop-filter: blur(var(--btn-glass-blur));
    -webkit-backdrop-filter: blur(var(--btn-glass-blur));
    border: 1px solid var(--btn-border);
    box-shadow: var(--btn-shadow);
    padding: 8px 16px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 500;
    transition: var(--transition);
    font-family: var(--font);
    color: var(--text-secondary);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.action-btn:hover,
.filter-tag:hover,
.random-btn:hover,
.btn:hover {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary);
    border-color: rgba(var(--primary-rgb), 0.4);
}

/* ========== 关键修改：选中按钮文字为白色 ========== */
.filter-tag.active {
    background: rgba(var(--primary-rgb), 0.35);
    color: #ffffff;          /* 白色文字，与紫色背景高对比 */
    font-weight: 600;
    border-color: rgba(var(--primary-rgb), 0.6);
}
/* ================================================ */

.search-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: clamp(16px, 4vw, 24px);
}

.search-bar-wrap {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-bar-wrap input {
    width: 100%;
    padding: 14px 48px 14px 20px;
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 1rem;
    font-family: var(--font);
    background: rgba(var(--surface-rgb), var(--btn-glass-opacity));
    backdrop-filter: blur(var(--btn-glass-blur));
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    color: var(--text-primary);
    outline: none;
}

.search-bar-wrap input:focus {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md), 0 0 0 6px rgba(var(--primary-rgb), 0.07);
    background: rgba(var(--surface-rgb), 0.5);
}

.search-bar-wrap input::placeholder {
    color: var(--text-hint);
}

.search-bar-wrap .search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-hint);
    pointer-events: none;
}

.random-btn {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.filter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: clamp(16px, 4vw, 24px);
}

.song-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: clamp(14px, 3vw, 20px);
    margin-bottom: clamp(20px, 5vw, 32px);
}

.song-card {
    background: var(--surface-glass);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(16px, 3vw, 20px);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    gap: 14px;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.song-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(var(--primary-rgb), 0.2);
}

.song-thumb {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.song-info {
    flex: 1;
    min-width: 0;
}

.song-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-artist {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.song-meta {
    font-size: 0.72rem;
    color: var(--text-hint);
    margin-top: 2px;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.song-tag-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
    background: rgba(var(--surface-rgb), 0.3);
}

.tag-language {
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--accent);
}

.tag-type {
    background: rgba(var(--secondary-rgb), 0.15);
    color: var(--secondary);
}

.tag-paid {
    background: rgba(var(--primary-rgb), 0.15);
    color: var(--primary);
}

.copy-hint {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.72rem;
    color: var(--primary);
    background: rgba(var(--primary-rgb), 0.15);
    backdrop-filter: blur(4px);
    padding: 4px 10px;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}

.song-card:hover .copy-hint {
    opacity: 1;
}

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-hint);
    grid-column: 1/-1;
}

.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(14px, 3vw, 20px);
    margin-bottom: clamp(20px, 5vw, 32px);
}

.chart-card {
    background: var(--surface-glass);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(16px, 3vw, 24px);
    box-shadow: var(--shadow-sm);
}

.chart-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.chart-container {
    width: 100%;
    height: 280px;
}

.admin-panel {
    background: var(--surface-glass);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(16px, 3vw, 24px);
    box-shadow: var(--shadow-sm);
    margin-bottom: clamp(20px, 5vw, 32px);
    display: none;
}

.admin-panel h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--primary);
}

.admin-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.admin-form input,
.admin-form select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: var(--font);
    background: rgba(var(--surface-rgb), var(--btn-glass-opacity));
    backdrop-filter: blur(var(--btn-glass-blur));
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.admin-form input:focus,
.admin-form select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.06);
}

.admin-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.btn-primary {
    background: rgba(var(--primary-rgb), 0.35);
    color: rgb(var(--primary-rgb));
    font-weight: 600;
    border: 1px solid rgba(var(--primary-rgb), 0.3);
}
.btn-primary:hover {
    background: rgba(var(--primary-rgb), 0.5);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid rgba(var(--primary-rgb), 0.6);
    color: rgb(var(--primary-rgb));
}
.btn-outline:hover {
    background: rgba(var(--primary-rgb), 0.15);
    border-color: rgba(var(--primary-rgb), 0.8);
}

.btn-danger {
    background: rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.3);
}
.btn-danger:hover {
    background: rgba(231, 76, 60, 0.5);
}

.admin-table-wrap {
    width: 100%;
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    margin-top: 12px;
    min-width: 700px;
}

.admin-table th {
    background: rgba(var(--primary-rgb), 0.1);
    padding: 10px;
    text-align: left;
    font-weight: 600;
    color: var(--primary);
    border-bottom: 2px solid var(--border-strong);
}

.admin-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
}

.admin-table .btn-sm {
    padding: 4px 10px;
    border-radius: 14px;
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    background: rgba(var(--surface-rgb), var(--btn-glass-opacity));
    backdrop-filter: blur(var(--btn-glass-blur));
    cursor: pointer;
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-right: 4px;
}

.admin-table .btn-sm:hover {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary);
}

.editable-cell {
    cursor: pointer;
    color: var(--primary);
    text-decoration: underline;
}

.editable-cell:hover {
    opacity: 0.8;
}

.song-detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    backdrop-filter: blur(4px);
}

.song-detail-modal.show {
    opacity: 1;
    visibility: visible;
}

.song-detail-content {
    background: var(--surface-glass-alt);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    max-width: 420px;
    width: 90%;
    position: relative;
}

.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 14px;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.btn-copy-detail {
    padding: 10px 20px;
    border-radius: 24px;
    background: rgba(var(--primary-rgb), 0.35);
    color: rgb(var(--primary-rgb));
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    cursor: pointer;
    font-size: 0.9rem;
    margin-right: 8px;
    backdrop-filter: blur(var(--btn-glass-blur));
}

.btn-video-jump {
    padding: 10px 20px;
    border-radius: 24px;
    background: rgba(var(--accent-rgb), 0.35);
    color: rgb(var(--accent-rgb));
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    backdrop-filter: blur(var(--btn-glass-blur));
}

.site-footer {
    text-align: center;
    padding: 28px 16px;
    color: var(--text-hint);
    font-size: 0.82rem;
    border-top: 1px solid var(--border);
    max-width: 1200px;
    margin: 0 auto;
}

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #1e293b;
    color: #fff;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 0.9rem;
    z-index: 1000;
    opacity: 0;
    transition: 0.35s;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.corner-btns {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: flex-end;
}

.corner-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--corner-btn-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1rem;
    box-shadow: var(--corner-btn-shadow);
    transition: transform 0.3s, background 0.3s;
    background: var(--corner-btn-bg);
    backdrop-filter: blur(10px);
}

.corner-btn:hover {
    transform: scale(1.08);
    background: rgba(var(--primary-rgb), 0.25);
}

#backToTopBtn {
    background: rgba(var(--primary-rgb), 0.3);
    color: rgb(var(--primary-rgb));
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s;
}

#backToTopBtn.show {
    opacity: 1;
    transform: translateY(0);
}

#themeToggleCorner,
#bgToggleCorner {
    color: rgb(var(--primary-rgb));
}

@media (max-width: 768px) {
    .navbar-links {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--surface-glass-alt);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 12px;
        transform: translateY(-120%);
        transition: 0.35s;
        z-index: 99;
    }

    .navbar-links.open {
        transform: translateY(0);
    }

    .navbar-links a {
        display: block;
        padding: 12px;
        border-radius: 12px;
        text-align: center;
    }

    .navbar-menu-btn {
        display: block;
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .hero-stats {
        justify-content: center;
    }
    .bilibili-info-row {
        justify-content: center;
    }

    .quick-links {
        justify-content: center;
    }

    .action-btn {
        padding: 6px 14px;
        font-size: 0.78rem;
    }

    .search-row {
        flex-direction: column;
        align-items: stretch;
    }

    .search-bar-wrap {
        min-width: auto;
    }

    .random-btn {
        align-self: center;
    }

    .filter-tags {
        justify-content: center;
    }

    .filter-tag {
        padding: 6px 14px;
        font-size: 0.8rem;
    }

    .song-grid {
        grid-template-columns: 1fr;
    }

    .song-card {
        padding: 14px;
    }

    .song-thumb {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }

    .song-title {
        font-size: 0.88rem;
    }

    .copy-hint {
        right: 8px;
        font-size: 0.65rem;
        padding: 3px 8px;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .admin-form {
        grid-template-columns: 1fr;
    }

    .admin-btns {
        justify-content: center;
    }
}