:root {
    --primary: #1a3a6b;
    --primary-dark: #0f2b50;
    --primary-light: #3a7abb;
    --primary-bg: #1a2a40;
    --secondary: #2a5a9b;
    --accent: #4a8acb;
    --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: 26, 58, 107;
    --secondary-rgb: 42, 90, 155;
    --accent-rgb: 74, 138, 203;
    --surface-rgb: 255, 255, 255;
    --text-primary-rgb: 26, 26, 46;
    --btn-glass-opacity: 0.25;
    --btn-glass-blur: 12px;

    --stat-number-color: #222;
    --stat-label-color: #444;

    --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);

    --intro-curtain-bg: #0f1f33;
    --intro-ring-border: rgba(26, 58, 107, 0.6);
    --intro-ring-shadow: rgba(26, 58, 107, 0.3);
    --intro-ring-border-b: rgba(26, 58, 107, 0.5);
    --intro-ring-shadow-b: rgba(26, 58, 107, 0.2);
    --intro-ring-border-c: rgba(26, 58, 107, 0.7);
    --intro-ring-shadow-c: rgba(26, 58, 107, 0.4);
    --intro-title-color: #ffffffd0;
    --intro-line-bg: rgba(255, 255, 255, 0.92);
    --intro-line-shadow: rgba(26, 58, 107, 0.3);
}

body.dark {
    --primary: #2a5a9b;
    --primary-dark: #1a3a6b;
    --primary-light: #4a8acb;
    --primary-bg: #0f1f33;
    --secondary: #3a7abb;
    --accent: #5a9adb;
    --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: 42, 90, 155;
    --secondary-rgb: 58, 122, 187;
    --accent-rgb: 74, 138, 203;
    --surface-rgb: 18, 18, 33;
    --text-primary-rgb: 240, 240, 255;

    --stat-number-color: #ddd;
    --stat-label-color: #aaa;

    --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);

    --intro-curtain-bg: #050a12;
    --intro-ring-border: rgba(42, 90, 155, 0.8);
    --intro-ring-shadow: rgba(42, 90, 155, 0.5);
    --intro-ring-border-b: rgba(42, 90, 155, 0.7);
    --intro-ring-shadow-b: rgba(42, 90, 155, 0.4);
    --intro-ring-border-c: rgba(42, 90, 155, 0.9);
    --intro-ring-shadow-c: rgba(42, 90, 155, 0.6);
    --intro-title-color: #ffffff;
    --intro-line-bg: rgba(255, 255, 255, 0.95);
    --intro-line-shadow: rgba(42, 90, 155, 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;
}

/* 背景层 - 完全无模糊 */
#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: none; 已移除 */
    transform: scale(1);
    transition: background-image 0.8s ease, opacity 0.6s ease;
    pointer-events: none;
    opacity: 0;
}
#bg-blur-layer.visible { opacity: 1; }

/* ===== 第一阶段加载屏幕 ===== */
#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;
}

/* ===== 第二阶段：幕布动画 ===== */
#intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f8fafc;
    pointer-events: none;
}
#intro-overlay .intro-mask {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,.08), transparent 26%),
                linear-gradient(180deg, #03071261, #030712d1);
    pointer-events: none;
}
.intro-curtain {
    position: absolute;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 50.5%;
    background: var(--intro-curtain-bg);
    pointer-events: none;
    will-change: transform, opacity;
}
.intro-curtain-top {
    top: 0;
    box-shadow: 0 18px 44px #00000094;
}
.intro-curtain-bottom {
    bottom: 0;
    box-shadow: 0 -18px 44px #00000094;
}
.intro-reveal-flash {
    position: absolute;
    left: 0;
    top: 50%;
    z-index: 2;
    width: 100%;
    height: 16vh;
    transform: translateY(-50%);
    background: radial-gradient(ellipse at 50% 50%, rgba(255,255,255,.16), rgba(255,255,255,.06) 30%, transparent 68%);
    mix-blend-mode: screen;
    opacity: 0;
    pointer-events: none;
    will-change: transform, opacity;
}
.intro-energy-field {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: grid;
    place-items: center;
    pointer-events: none;
}
.intro-energy-ring {
    position: absolute;
    width: min(58vw, 680px);
    aspect-ratio: 1;
    border-radius: 50%;
    border: 2px solid var(--intro-ring-border);
    opacity: 0;
    box-shadow: 0 0 40px var(--intro-ring-shadow), inset 0 0 30px var(--intro-ring-shadow);
    will-change: transform, opacity;
}
.intro-energy-ring.ring-b {
    width: min(46vw, 540px);
    border-style: dashed;
    border-color: var(--intro-ring-border-b);
    box-shadow: 0 0 35px var(--intro-ring-shadow-b), inset 0 0 25px var(--intro-ring-shadow-b);
}
.intro-energy-ring.ring-c {
    width: min(34vw, 400px);
    border-color: var(--intro-ring-border-c);
    box-shadow: 0 0 50px var(--intro-ring-shadow-c), inset 0 0 40px var(--intro-ring-shadow-c);
}
#intro-overlay.intro-preparing .intro-energy-ring {
    animation: introSpinBreath 2.6s ease-in-out infinite;
    opacity: 0.6;
}
#intro-overlay.intro-preparing .intro-energy-ring.ring-b {
    animation: introSpinBreathReverse 3s ease-in-out infinite;
    opacity: 0.5;
}
#intro-overlay.intro-preparing .intro-energy-ring.ring-c {
    animation: introSpinBreath 2s ease-in-out infinite;
    opacity: 0.7;
}
@keyframes introSpinBreath {
    0%   { transform: rotate(0deg) scale(1); }
    50%  { transform: rotate(180deg) scale(1.01); }
    100% { transform: rotate(360deg) scale(1); }
}
@keyframes introSpinBreathReverse {
    0%   { transform: rotate(0deg) scale(1); }
    50%  { transform: rotate(-180deg) scale(1.01); }
    100% { transform: rotate(-360deg) scale(1); }
}
.intro-card {
    position: relative;
    z-index: 6;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: min(760px, calc(100vw - 40px));
    text-align: center;
    text-shadow: 0 5px 22px rgba(2,6,23,.6);
    opacity: 0;
    visibility: hidden;
}
.intro-kicker {
    font-size: clamp(13px, 1.4vw, 16px);
    font-weight: 800;
    line-height: 1;
    color: var(--intro-title-color);
}
.intro-title {
    max-width: 100%;
    font-size: clamp(30px, 5.6vw, 64px);
    font-weight: 900;
    line-height: 1.05;
    text-align: center;
    white-space: nowrap;
    overflow-wrap: normal;
    color: #fff;
}
.intro-line {
    width: min(360px, 68vw);
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent, var(--intro-line-bg), transparent);
    box-shadow: 0 0 12px var(--intro-line-shadow);
    transform: scaleX(0);
    transform-origin: 50% 50%;
}

/* ===== 主应用 ===== */
#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);
}

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px) saturate(180%);   /* 降低模糊度 */
    -webkit-backdrop-filter: blur(8px) 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(4px);
    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;
}

/* ===== 导航栏帮助按钮 ===== */
.navbar-help-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 40px;
    border: 1px solid rgba(var(--primary-rgb), 0.25);
    background: rgba(var(--primary-rgb), 0.08);
    backdrop-filter: blur(4px);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    letter-spacing: 0.3px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.02);
}
.navbar-help-btn i {
    font-size: 1.1rem;
    color: var(--primary-light);
    transition: var(--transition);
}
.navbar-help-btn:hover {
    background: rgba(var(--primary-rgb), 0.18);
    border-color: rgba(var(--primary-rgb), 0.5);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.navbar-help-btn:hover i {
    color: var(--primary);
}
.navbar-help-btn:active {
    transform: scale(0.96);
}

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

/* ===== Hero 区域 ===== */
.hero-section {
    display: flex;
    align-items: center;
    gap: clamp(20px, 5vw, 40px);
    padding: clamp(20px, 5vw, 40px);
    background: var(--surface-glass);
    backdrop-filter: blur(8px);      /* 降低模糊度 */
    -webkit-backdrop-filter: blur(8px);
    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(6px);
    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;
    transition: transform 0.3s;
    cursor: default;
}
.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: #ffffff;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.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(--stat-number-color);
    transition: color 0.3s;
}
.hero-stat .stat-label {
    font-size: 0.78rem;
    color: var(--stat-label-color);
}

/* ===== quick-links 已隐藏 ===== */
.quick-links {
    display: none;
}

/* ===== 搜索与过滤 ===== */
.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));   /* 保持原模糊度 12px */
    -webkit-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;
    background: var(--btn-bg);
    backdrop-filter: blur(6px);    /* 降低模糊度 */
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--btn-border);
    box-shadow: var(--btn-shadow);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: var(--transition);
}
.random-btn:hover {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary);
    border-color: rgba(var(--primary-rgb), 0.4);
}

.filter-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: clamp(16px, 4vw, 24px);
}
.filter-tag {
    background: var(--btn-bg);
    backdrop-filter: blur(6px);    /* 降低模糊度 */
    -webkit-backdrop-filter: blur(6px);
    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;
}
.filter-tag:hover {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary);
    border-color: rgba(var(--primary-rgb), 0.4);
}
.filter-tag.active {
    background: rgba(var(--primary-rgb), 0.35);
    color: #ffffff;
    font-weight: 600;
    border-color: rgba(var(--primary-rgb), 0.6);
}

/* ===== 歌曲网格 ===== */
.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(8px);    /* 降低模糊度 */
    -webkit-backdrop-filter: blur(8px);
    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);
    background: #4a8acb !important;
}
.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-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;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 20px 0;
}
.pagination-btn {
    padding: 6px 14px;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: var(--btn-bg);
    backdrop-filter: blur(6px);    /* 降低模糊度 */
    -webkit-backdrop-filter: blur(6px);
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}
.pagination-btn:hover:not([disabled]) {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary);
}
.pagination-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination-btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}
.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    padding: 0 4px;
    color: var(--text-hint);
}

/* ===== 图表区域 ===== */
.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);   /* 保持较高模糊度（不降低） */
    -webkit-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;
}

/* ===== 关于 ===== */
.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 ===== */
.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);
}

/* ===== 自定义弹窗 ===== */
.custom-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: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    backdrop-filter: blur(4px);
}
.custom-modal.active {
    opacity: 1;
    visibility: visible;
}
.custom-modal-content {
    background: var(--surface-glass-alt);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}
.custom-modal.active .custom-modal-content {
    transform: translateY(0);
}
.custom-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.custom-modal-header span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}
.custom-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}
.custom-modal-body {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.6;
}
.custom-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}
.custom-modal-btn {
    padding: 8px 20px;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: var(--btn-bg);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    font-family: var(--font);
}
.custom-modal-btn:hover {
    background: rgba(var(--primary-rgb), 0.15);
}
.custom-modal-btn.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.custom-modal-btn.btn-primary:hover {
    background: var(--primary-dark);
}
.custom-modal-btn.btn-secondary {
    background: transparent;
    border-color: var(--border-strong);
}

/* ===== 歌曲详情弹窗 ===== */
.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));
    font-family: var(--font);
}
.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));
}

/* ===== 角落按钮 ===== */
.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));
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    .hero-stats {
        justify-content: center;
    }
    .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;
    }
    .navbar {
        padding: 0 12px;
    }
    .navbar-help-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    .navbar-help-btn i {
        font-size: 0.9rem;
    }
}