:root {
    --bg: #0b0b1a;
    --bg2: #0f0f23;
    --surface: rgba(255,255,255,0.04);
    --surface-hover: rgba(255,255,255,0.08);
    --border: rgba(255,255,255,0.07);
    --text: #f1f1f7;
    --text-muted: rgba(255,255,255,0.42);
    --primary: #6366f1;
    --accent: #a855f7;
    --secondary: #06b6d4;
    --gradient: linear-gradient(135deg, #6366f1, #a855f7);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --card-shadow: 0 2px 12px rgba(0,0,0,0.2);
    --icon-bg: rgba(99,102,241,0.12);
    --icon-bg-hover: rgba(99,102,241,0.2);
    --logo-filter: none;
}

body.light {
    --bg: #f0f2f5;
    --bg2: #e8ecf1;
    --surface: rgba(255,255,255,0.7);
    --surface-hover: rgba(255,255,255,0.95);
    --border: rgba(0,0,0,0.08);
    --text: #1d1d1f;
    --text-muted: rgba(0,0,0,0.42);
    --primary: #6366f1;
    --accent: #a855f7;
    --secondary: #0891b2;
    --gradient: linear-gradient(135deg, #6366f1, #a855f7);
    --shadow: 0 8px 32px rgba(0,0,0,0.08);
    --card-shadow: 0 2px 12px rgba(0,0,0,0.06);
    --icon-bg: rgba(99,102,241,0.08);
    --icon-bg-hover: rgba(99,102,241,0.15);
    --logo-filter: brightness(0);
}

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

html { height: 100%; }

body {
    font-family: -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100%;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    transition: background 0.5s ease, color 0.5s ease;
}

a { color: inherit; text-decoration: none; }

/* ─── Animated Background ─── */
.bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
    background: var(--bg2);
    transition: background 0.5s ease;
}

.bg::before, .bg::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12;
    animation: float 25s ease-in-out infinite;
    transition: opacity 0.6s ease;
}

body.light .bg::before,
body.light .bg::after {
    opacity: 0.18;
}

.bg::before {
    width: 600px; height: 600px;
    background: var(--primary);
    top: -20%; left: -10%;
}

.bg::after {
    width: 500px; height: 500px;
    background: var(--accent);
    bottom: -20%; right: -10%;
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% { transform: translate(0,0) scale(1); }
    33% { transform: translate(80px,-60px) scale(1.1); }
    66% { transform: translate(-50px,40px) scale(0.95); }
}

.bg i {
    position: absolute;
    width: 3px; height: 3px;
    background: rgba(99,102,241,0.25);
    border-radius: 50%;
    animation: dotFloat linear infinite;
}

.bg i:nth-child(1) { top:20%; left:10%; animation-duration:14s; width:4px;height:4px; }
.bg i:nth-child(2) { top:70%; left:85%; animation-duration:18s; animation-delay:-3s; }
.bg i:nth-child(3) { top:40%; left:92%; animation-duration:12s; animation-delay:-6s; }
.bg i:nth-child(4) { top:85%; left:12%; animation-duration:16s; animation-delay:-8s; width:4px;height:4px; }
.bg i:nth-child(5) { top:15%; left:65%; animation-duration:13s; animation-delay:-4s; }
.bg i:nth-child(6) { top:55%; left:5%; animation-duration:15s; animation-delay:-10s; }
.bg i:nth-child(7) { top:25%; left:45%; animation-duration:19s; animation-delay:-5s; width:5px;height:5px; }
.bg i:nth-child(8) { top:75%; left:40%; animation-duration:11s; animation-delay:-7s; }

@keyframes dotFloat {
    0% { transform: translateY(0) scale(1); opacity:0; }
    10% { opacity:0.6; }
    90% { opacity:0.6; }
    100% { transform: translateY(-150px) scale(0); opacity:0; }
}

/* ─── Theme Toggle ─── */
.theme-toggle {
    position: fixed;
    top: 22px;
    right: 24px;
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    transition: transform 0.25s ease, background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    background: var(--surface-hover);
    border-color: rgba(99,102,241,0.35);
    color: var(--primary);
}

.theme-toggle:focus-visible {
    outline: 3px solid rgba(99,102,241,0.25);
    outline-offset: 2px;
}

/* ─── Main ─── */
.main {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 24px 40px;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

/* ─── Content Layout ─── */
.qq-sidebar {
    position: fixed;
    top: 50%;
    left: 24px;
    transform: translateY(-50%);
    z-index: 2;
    pointer-events: auto;
}

.qq-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 18px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius, 14px);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.qq-image {
    width: 160px;
    height: 160px;
    border-radius: 12px;
    object-fit: contain;
    background: #f5f5f5;
    padding: 8px;
    border: 1px solid rgba(0,0,0,0.08);
}

.qq-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

/* ─── Announcements ─── */
.announcement-main {
    justify-content: flex-start;
    padding-top: 56px;
}

.announcement-panel {
    width: 100%;
    margin-bottom: 28px;
    padding: 20px 22px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius, 14px);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-align: left;
}

.announcement-heading {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 9px;
    margin-bottom: 14px;
    color: var(--text);
    text-align: left;
}

.announcement-mark {
    width: 4px;
    height: 18px;
    border-radius: 4px;
    background: var(--gradient);
    flex-shrink: 0;
}

.announcement-heading h1 {
    font-size: 17px;
    font-weight: 700;
}

.announcement-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    text-align: left;
}

.announcement-item {
    padding: 0 0 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.announcement-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.announcement-title {
    margin-bottom: 5px;
    color: var(--text);
    font-size: var(--announcement-title-size, 14px);
    font-weight: 600;
    text-align: left;
}

.announcement-content,
.announcement-empty {
    color: var(--text-muted);
    font-size: var(--announcement-content-size, 13px);
    line-height: 1.75;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    text-align: left;
    direction: ltr;
}

/* ─── Links Grid ─── */
.links-container { width: 100%; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    min-height: 82px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius, 14px);
    transition: all 0.3s;
    min-width: 0;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--card-shadow);
}

.link-card:hover {
    background: var(--surface-hover);
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.link-icon {
    width: 48px; height: 48px;
    border-radius: 14px;
    background: var(--icon-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--secondary);
    flex-shrink: 0;
    transition: background 0.3s;
    overflow: hidden;
}

.link-card:hover .link-icon {
    background: var(--icon-bg-hover);
}

.link-icon .img-icon {
    width: 100%; height: 100%;
    object-fit: cover;
    border-radius: 14px;
}

.link-icon i { font-size: 22px; }

.link-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.link-title {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-desc {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

@keyframes rainbowTextFlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

body.link-hover-rainbow .link-card:hover .link-title,
body.link-hover-rainbow .link-card:hover .link-desc {
    color: transparent;
    background-image: linear-gradient(90deg,#ff3d81,#ff9f1c,#ffe14d,#24d17e,#00b8f5,#7c5cff,#e94bff,#ff3d81);
    background-size: 200% 100%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbowTextFlow 2.2s linear infinite;
}

body.link-hover-rainbow .link-card:hover .link-desc {
    animation-delay: -.35s;
}

@media (prefers-reduced-motion: reduce) {
    body.link-hover-rainbow .link-card:hover .link-title,
    body.link-hover-rainbow .link-card:hover .link-desc {
        animation: none;
        background-position: 50% 50%;
    }
}

.empty-msg {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 0;
    color: var(--text-muted);
    font-size: 14px;
}

/* ─── Music Player ─── */
.music-player {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 20;
    width: 340px;
    min-height: 126px;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    border: 1px solid var(--music-border);
    border-radius: 20px;
    color: var(--music-text);
    background: var(--music-bg);
    box-shadow: var(--music-shadow);
    overflow: hidden;
    transition: transform .28s ease, opacity .28s ease, background .3s ease, border-color .3s ease;
}

.music-player.is-collapsed {
    opacity: 0;
    pointer-events: none;
    transform: translateY(24px) scale(.94);
}

.music-player button,
.music-restore {
    border: 0;
    font: inherit;
    cursor: pointer;
}

.music-art {
    position: relative;
    width: 78px;
    height: 78px;
    flex: 0 0 78px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    color: var(--music-accent);
    background: var(--music-art-bg);
    box-shadow: var(--music-art-shadow);
    overflow: hidden;
}

.music-art > i { position: relative; z-index: 2; font-size: 24px; }
.music-player.is-playing .music-art { animation: musicPulse 2.4s ease-in-out infinite; }
.music-player.template-vinyl.is-playing .music-art { animation: musicSpin 7s linear infinite; }

@keyframes musicPulse {
    50% { transform: translateY(-2px) scale(1.025); }
}

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

.music-body { flex: 1; min-width: 0; }
.music-topline { display: flex; align-items: flex-start; gap: 8px; }
.music-meta { min-width: 0; flex: 1; display: flex; flex-direction: column; }
.music-meta strong { overflow: hidden; color: var(--music-text); font-size: 14px; white-space: nowrap; text-overflow: ellipsis; }
.music-meta span { overflow: hidden; margin-top: 2px; color: var(--music-muted); font-size: 11px; white-space: nowrap; text-overflow: ellipsis; }
.music-collapse { width: 26px; height: 26px; border-radius: 50%; color: var(--music-muted); background: transparent; transition: .2s; }
.music-collapse:hover { color: var(--music-text); background: var(--music-button-hover); }

.music-controls { display: flex; align-items: center; gap: 7px; margin-top: 13px; }
.music-controls > button { width: 30px; height: 30px; border-radius: 50%; color: var(--music-text); background: transparent; transition: transform .2s, background .2s; }
.music-controls > button:hover { transform: translateY(-1px); background: var(--music-button-hover); }
.music-controls .music-play { width: 38px; height: 38px; color: var(--music-play-text); background: var(--music-accent-bg); box-shadow: 0 5px 14px var(--music-accent-shadow); }
.music-controls button:disabled { opacity: .35; cursor: not-allowed; transform: none; }
.music-volume { display: flex; flex: 1; align-items: center; gap: 6px; margin-left: 3px; color: var(--music-muted); font-size: 12px; }
.music-volume input { width: 100%; height: 4px; accent-color: var(--music-accent); cursor: pointer; }

.music-templates { display: flex; align-items: center; gap: 7px; margin-top: 8px; color: var(--music-muted); font-size: 10px; }
.music-templates button { width: 13px; height: 13px; border: 2px solid rgba(255,255,255,.7); border-radius: 50%; box-shadow: 0 0 0 1px rgba(0,0,0,.15); transition: transform .2s; }
.music-templates button:hover,
.music-templates button.active { transform: scale(1.25); }
.music-templates button[data-music-template="glass"] { background: linear-gradient(135deg,#6366f1,#a855f7); }
.music-templates button[data-music-template="vinyl"] { background: linear-gradient(135deg,#24140d,#d7a52b); }
.music-templates button[data-music-template="minimal"] { background: linear-gradient(135deg,#f7f9fc,#8792aa); }

.music-restore {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 19;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #fff;
    background: linear-gradient(135deg,#6366f1,#a855f7);
    box-shadow: 0 8px 24px rgba(99,102,241,.35);
    opacity: 0;
    pointer-events: none;
    transform: scale(.8);
    transition: .25s;
}
.music-restore.is-visible { opacity: 1; pointer-events: auto; transform: scale(1); }
.music-restore:hover { transform: scale(1.07); }

.music-player.template-glass {
    --music-bg: linear-gradient(135deg,rgba(28,30,62,.92),rgba(55,32,72,.88));
    --music-border: rgba(255,255,255,.16);
    --music-text: #fff;
    --music-muted: rgba(255,255,255,.58);
    --music-accent: #c4b5fd;
    --music-accent-bg: linear-gradient(135deg,#6366f1,#a855f7);
    --music-accent-shadow: rgba(99,102,241,.34);
    --music-play-text: #fff;
    --music-button-hover: rgba(255,255,255,.1);
    --music-art-bg: linear-gradient(135deg,rgba(99,102,241,.32),rgba(168,85,247,.26));
    --music-art-shadow: inset 0 0 24px rgba(255,255,255,.08);
    --music-shadow: 0 18px 48px rgba(13,12,35,.38);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.music-player.template-vinyl {
    --music-bg: linear-gradient(135deg,#3a2419,#17100d 72%);
    --music-border: rgba(245,190,72,.25);
    --music-text: #fff2d0;
    --music-muted: rgba(255,231,181,.56);
    --music-accent: #e9bd52;
    --music-accent-bg: linear-gradient(135deg,#e5b540,#9c6820);
    --music-accent-shadow: rgba(199,139,39,.3);
    --music-play-text: #24170f;
    --music-button-hover: rgba(255,224,165,.1);
    --music-art-bg: radial-gradient(circle,#e7b740 0 8px,#171717 9px 18px,#343434 19px 23px,#111 24px 36px,#2b2b2b 37px);
    --music-art-shadow: 0 6px 16px rgba(0,0,0,.35);
    --music-shadow: 0 18px 48px rgba(35,18,8,.42);
    border-radius: 12px;
}
.music-player.template-vinyl .music-art { border-radius: 50%; }
.music-player.template-vinyl .music-art > i { display: none; }
.music-player.template-vinyl .vinyl-center { width: 7px; height: 7px; border-radius: 50%; background: #24170f; box-shadow: 0 0 0 5px #e4b038; }

.music-player.template-minimal {
    --music-bg: rgba(250,251,254,.97);
    --music-border: #dfe4ed;
    --music-text: #24283a;
    --music-muted: #778096;
    --music-accent: #5363d8;
    --music-accent-bg: #24283a;
    --music-accent-shadow: rgba(36,40,58,.2);
    --music-play-text: #fff;
    --music-button-hover: #e9edf5;
    --music-art-bg: linear-gradient(145deg,#edf0ff,#dfe5ff);
    --music-art-shadow: inset 0 0 0 1px rgba(83,99,216,.1);
    --music-shadow: 0 14px 38px rgba(52,62,90,.16);
    border-radius: 14px;
}
.music-player.template-minimal .music-art { border-radius: 12px; }
.music-player.template-minimal .music-templates button { border-color:#fff; }

/* ─── Footer ─── */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 13px;
}

.footer p {
    display: inline-block;
    padding: 8px 28px;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.3s;
}

.footer p:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.08);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .qq-sidebar { position:relative; top:auto; left:auto; transform:none; width:100%; max-width:260px; margin:0 auto 18px; }
    .qq-card { flex-direction:row; gap:12px; padding:12px 16px; width:100%; justify-content:flex-start; }
    .qq-image { width:72px; height:72px; }
    .theme-toggle { top:14px; right:16px; width:36px; height:36px; }
    .announcement-main { padding-top: 64px; }
    .announcement-panel { padding: 18px; }
    .links-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
    .link-card { padding: 15px 16px; min-height:74px; }
    .link-icon { width: 42px; height: 42px; }
    .link-title { font-size: 15px; }
    .link-desc { font-size:12px; }
    .music-player { right:14px; bottom:14px; width:min(340px,calc(100vw - 28px)); }
    .music-restore { right:14px; bottom:14px; }
}

@media (max-width: 480px) {
    .links-grid { grid-template-columns: repeat(2, 1fr); }
    .announcement-main { padding-top: 60px; }
    .announcement-panel { padding: 16px; }
    .announcement-title { font-size: var(--announcement-title-size, 14px); }
    .announcement-content, .announcement-empty { font-size: var(--announcement-content-size, 13px); }
    .music-player { gap:11px; padding:13px; min-height:112px; border-radius:16px; }
    .music-art { width:62px; height:62px; flex-basis:62px; }
    .music-controls { margin-top:10px; }
    .music-templates { margin-top:6px; }
}