/* ===================================================================
   配音界工作室 - 主样式
   深色科技风 + 声波动效 + 渐变高亮
   =================================================================== */

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

:root {
    --bg-deep: #050811;
    --bg: #0a0e17;
    --bg-card: rgba(16, 20, 31, 0.7);
    --bg-card-hover: rgba(22, 28, 42, 0.85);
    --line: rgba(64, 156, 255, 0.15);
    --line-hover: rgba(41, 196, 255, 0.4);
    --primary: #29c4ff;
    --primary-2: #3a6fff;
    --primary-glow: rgba(41, 196, 255, 0.35);
    --accent: #8a7bc6;
    --accent-2: #ff6ba4;
    --success: #4ade80;
    --warning: #ffa726;
    --text: #e0e0e0;
    --text-soft: #cbd5e0;
    --text-mute: #a0aec0;
    --text-faint: #718096;
    --grad-main: linear-gradient(90deg, #29c4ff, #8a7bc6);
    --grad-primary: linear-gradient(90deg, #29c4ff, #3a6fff);
    --grad-green: linear-gradient(90deg, #21a366, #1e8e5a);
    --shadow-soft: 0 8px 30px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 30px rgba(41, 196, 255, 0.18);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
}

/* 全局背景：科技网格 + 光晕 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        linear-gradient(90deg, transparent 49%, rgba(0, 150, 255, 0.02) 50%, transparent 51%),
        linear-gradient(transparent 49%, rgba(0, 150, 255, 0.02) 50%, transparent 51%);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: -2;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 10% 10%, rgba(41, 196, 255, 0.06) 0%, transparent 25%),
        radial-gradient(circle at 90% 30%, rgba(138, 123, 198, 0.06) 0%, transparent 25%),
        radial-gradient(circle at 50% 90%, rgba(41, 196, 255, 0.04) 0%, transparent 25%);
    pointer-events: none;
    z-index: -1;
}

a { color: inherit; text-decoration: none; transition: color 0.3s; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* 渐变文字 */
.grad-text {
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ===================================================================
   顶部导航
   =================================================================== */
.top-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 18px 0;
    background: rgba(10, 14, 23, 0.6);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    transition: all 0.35s ease;
}

.top-nav.scrolled {
    padding: 12px 0;
    background: rgba(10, 14, 23, 0.92);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
}

.logo-icon {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 22px;
}

.logo-icon .wave-bar {
    width: 3px;
    background: var(--grad-primary);
    border-radius: 2px;
    animation: logoWave 1.4s ease-in-out infinite;
}
.logo-icon .wave-bar:nth-child(1) { height: 50%; animation-delay: 0s; }
.logo-icon .wave-bar:nth-child(2) { height: 100%; animation-delay: 0.15s; }
.logo-icon .wave-bar:nth-child(3) { height: 70%; animation-delay: 0.3s; }
.logo-icon .wave-bar:nth-child(4) { height: 85%; animation-delay: 0.45s; }

@keyframes logoWave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.4); }
}

.logo-text {
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    display: flex;
    gap: 6px;
    align-items: center;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-soft);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(41, 196, 255, 0.08);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(41, 196, 255, 0.12);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    background: var(--grad-primary);
    color: #fff;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 14px var(--primary-glow);
    transition: all 0.3s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 22px var(--primary-glow);
}

/* ===================================================================
   Hero 区
   =================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 24px 80px;
    overflow: hidden;
    text-align: center;
}

/* 背景声波柱 */
.hero-wave-bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    opacity: 0.5;
    pointer-events: none;
    z-index: 0;
}

.wave-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    width: 8px;
}

.wave-column span {
    display: block;
    width: 100%;
    height: 16px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 4px;
    opacity: 0.15;
    animation: barWave 1.8s ease-in-out infinite;
}

.wave-column:nth-child(odd) span { animation-duration: 1.4s; }
.wave-column:nth-child(3n) span { animation-duration: 2.2s; animation-delay: 0.2s; }
.wave-column:nth-child(4n) span { animation-delay: 0.5s; }
.wave-column:nth-child(5n) span { animation-delay: 0.8s; }

.wave-column span:nth-child(2n)   { animation-delay: 0.1s; }
.wave-column span:nth-child(3n)   { animation-delay: 0.3s; }
.wave-column span:nth-child(4n)   { animation-delay: 0.5s; }
.wave-column span:nth-child(5n)   { animation-delay: 0.7s; }
.wave-column span:nth-child(6n)    { animation-delay: 0.9s; }

@keyframes barWave {
    0%, 100% { transform: scaleY(0.3); opacity: 0.1; }
    50% { transform: scaleY(1); opacity: 0.4; }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 920px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(41, 196, 255, 0.1);
    border: 1px solid var(--line);
    border-radius: 30px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 1px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #fff 0%, #29c4ff 50%, #8a7bc6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 40px rgba(41, 196, 255, 0.3);
}

.hero-subtitle {
    font-size: clamp(15px, 1.6vw, 18px);
    color: var(--text-mute);
    margin-bottom: 36px;
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px var(--primary-glow);
}

.btn-ghost {
    background: rgba(16, 20, 31, 0.6);
    color: var(--text);
    border: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

.btn-lg {
    padding: 16px 38px;
    font-size: 16px;
}

.hero-stats {
    display: inline-flex;
    align-items: center;
    gap: 36px;
    padding: 20px 36px;
    background: rgba(16, 20, 31, 0.6);
    backdrop-filter: blur(14px);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    font-family: 'Segoe UI', sans-serif;
}

.stat-num span {
    font-size: 18px;
    margin-left: 2px;
    color: var(--accent);
}

.stat-label {
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-mute);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--line);
}

.hero-scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-faint);
    font-size: 20px;
    animation: scrollBounce 2s ease-in-out infinite;
    z-index: 2;
}

@keyframes scrollBounce {
    0%, 100% { transform: translate(-50%, 0); opacity: 0.6; }
    50% { transform: translate(-50%, 8px); opacity: 1; }
}

/* ===================================================================
   通用 Section
   =================================================================== */
.section {
    position: relative;
    padding: 100px 24px;
}

.section-inner {
    max-width: 1280px;
    margin: 0 auto;
}

.section-head {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(41, 196, 255, 0.08);
    border: 1px solid var(--line);
    color: var(--primary);
    font-size: 12px;
    border-radius: 20px;
    margin-bottom: 18px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-desc {
    color: var(--text-mute);
    max-width: 640px;
    margin: 0 auto;
    font-size: 15px;
    line-height: 1.8;
}

/* ===================================================================
   业务领域
   =================================================================== */
.biz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.biz-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px 24px;
    backdrop-filter: blur(14px);
    transition: all 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
    position: relative;
    overflow: hidden;
}

.biz-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.biz-card:hover {
    transform: translateY(-8px);
    background: var(--bg-card-hover);
    border-color: var(--line-hover);
    box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(41, 196, 255, 0.15);
}

.biz-card:hover::before { transform: scaleX(1); }

.biz-card-wide {
    grid-column: span 2;
}

.biz-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(41, 196, 255, 0.18), rgba(138, 123, 198, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 18px;
    border: 1px solid var(--line);
    transition: all 0.4s;
}

.biz-card:hover .biz-icon {
    background: var(--grad-primary);
    color: #fff;
    transform: rotate(-6deg) scale(1.05);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.biz-title {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.biz-desc {
    color: var(--text-mute);
    font-size: 14px;
    line-height: 1.75;
    margin-bottom: 18px;
}

.biz-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.biz-tags li {
    padding: 3px 10px;
    background: rgba(41, 196, 255, 0.08);
    color: var(--primary);
    border: 1px solid var(--line);
    border-radius: 20px;
    font-size: 11px;
}

/* ===================================================================
   音乐服务
   =================================================================== */
.section-music {
    background:
        radial-gradient(circle at 20% 30%, rgba(138, 123, 198, 0.08), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(41, 196, 255, 0.05), transparent 40%);
}

.music-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.music-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(14px);
    transition: all 0.4s;
}

.music-card:hover {
    transform: translateY(-6px);
    border-color: var(--line-hover);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}

.music-cover {
    height: 220px;
    background:
        radial-gradient(circle at 30% 50%, rgba(41, 196, 255, 0.2), transparent 60%),
        linear-gradient(135deg, #1a1f33 0%, #0f1320 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.music-cover-2 {
    background:
        radial-gradient(circle at 70% 50%, rgba(138, 123, 198, 0.2), transparent 60%),
        linear-gradient(135deg, #2a1f33 0%, #0f1320 100%);
}

.music-cover > i {
    font-size: 64px;
    color: rgba(255, 255, 255, 0.85);
    z-index: 2;
    text-shadow: 0 0 30px rgba(41, 196, 255, 0.5);
}

.music-wave {
    position: absolute;
    bottom: 20px;
    left: 0; right: 0;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 4px;
    height: 60px;
}

.music-wave span {
    width: 4px;
    background: linear-gradient(180deg, var(--primary), rgba(41, 196, 255, 0.2));
    border-radius: 2px;
    animation: musicBar 1.2s ease-in-out infinite;
}

.music-wave span:nth-child(1) { height: 30%; animation-delay: 0s; }
.music-wave span:nth-child(2) { height: 60%; animation-delay: 0.1s; }
.music-wave span:nth-child(3) { height: 90%; animation-delay: 0.2s; }
.music-wave span:nth-child(4) { height: 70%; animation-delay: 0.3s; }
.music-wave span:nth-child(5) { height: 100%; animation-delay: 0.4s; }
.music-wave span:nth-child(6) { height: 50%; animation-delay: 0.5s; }
.music-wave span:nth-child(7) { height: 80%; animation-delay: 0.6s; }
.music-wave span:nth-child(8) { height: 40%; animation-delay: 0.7s; }
.music-wave span:nth-child(9) { height: 90%; animation-delay: 0.8s; }
.music-wave span:nth-child(10) { height: 60%; animation-delay: 0.9s; }

@keyframes musicBar {
    0%, 100% { transform: scaleY(0.3); }
    50% { transform: scaleY(1); }
}

.music-body {
    padding: 28px;
}

.music-label {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(41, 196, 255, 0.1);
    color: var(--primary);
    border: 1px solid var(--line);
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 14px;
}

.music-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.music-desc {
    color: var(--text-mute);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 18px;
}

.music-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 0;
    color: var(--text-soft);
    font-size: 13px;
    border-bottom: 1px dashed rgba(64, 156, 255, 0.1);
}

.music-list li:last-child { border-bottom: none; }

.music-list i {
    color: var(--success);
    font-size: 12px;
}

/* ===================================================================
   客户案例
   =================================================================== */
.section-clients {
    background:
        radial-gradient(circle at 50% 0%, rgba(41, 196, 255, 0.05), transparent 50%);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 60px;
}

.client-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 30px 20px;
    text-align: center;
    backdrop-filter: blur(14px);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.client-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(41, 196, 255, 0.08), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s;
}

.client-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--line-hover);
    box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}

.client-card:hover::before { opacity: 1; }

.client-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 14px;
    background: var(--grad-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: #fff;
    box-shadow: 0 8px 20px var(--primary-glow);
    position: relative;
    z-index: 1;
}

.client-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    position: relative;
    z-index: 1;
}

.client-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(138, 123, 198, 0.15);
    color: var(--accent);
    border-radius: 12px;
    font-size: 11px;
    position: relative;
    z-index: 1;
}

/* 跑马灯 */
.clients-marquee {
    overflow: hidden;
    padding: 20px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
}

.marquee-track {
    display: inline-flex;
    align-items: center;
    gap: 30px;
    white-space: nowrap;
    animation: marquee 30s linear infinite;
}

.marquee-track span {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-faint);
}

.marquee-track .dot {
    color: var(--primary);
    font-size: 14px;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ===================================================================
   联系我们
   =================================================================== */
.section-contact {
    background:
        radial-gradient(circle at 30% 50%, rgba(41, 196, 255, 0.06), transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(138, 123, 198, 0.06), transparent 50%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 22px 26px;
    backdrop-filter: blur(14px);
    transition: all 0.3s;
}

.contact-card:hover {
    border-color: var(--line-hover);
    transform: translateX(6px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.contact-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 6px 16px var(--primary-glow);
}

.contact-meta {
    flex: 1;
}

.contact-label {
    font-size: 12px;
    color: var(--text-mute);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.contact-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

a.contact-value:hover {
    color: var(--primary);
}

.contact-note {
    font-size: 12px;
    color: var(--text-faint);
}

.contact-cta {
    margin-top: 12px;
    display: flex;
    justify-content: center;
}

/* 微信二维码 */
.contact-qr {
    position: sticky;
    top: 100px;
}

.qr-card {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 24px;
    backdrop-filter: blur(14px);
    text-align: center;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.qr-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-main);
}

.qr-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--success);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.qr-image {
    width: 240px;
    height: 240px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #1a1f33, #0f1320);
    border: 1px solid var(--line);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.qr-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 占位（无二维码图片时） */
.qr-image.qr-fallback .qr-fallback-content {
    display: flex;
}

.qr-fallback-content {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-mute);
    text-align: center;
    padding: 20px;
}

.qr-fallback-icon {
    font-size: 56px;
    color: var(--success);
    margin-bottom: 12px;
}

.qr-fallback-text {
    font-size: 14px;
    color: var(--text-mute);
    margin-bottom: 6px;
}

.qr-fallback-phone {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.qr-fallback-tip {
    font-size: 11px;
    color: var(--text-faint);
    line-height: 1.6;
    max-width: 200px;
}

.qr-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-mute);
}

/* ===================================================================
   页脚
   =================================================================== */
.footer {
    background: linear-gradient(180deg, transparent, rgba(5, 8, 17, 0.8));
    border-top: 1px solid var(--line);
    padding: 60px 24px 0;
    position: relative;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-slogan {
    color: var(--text-mute);
    font-size: 14px;
    margin-bottom: 16px;
}

.footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-tags span {
    padding: 3px 10px;
    background: rgba(41, 196, 255, 0.08);
    border: 1px solid var(--line);
    color: var(--primary);
    border-radius: 16px;
    font-size: 11px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-col h4 {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 14px;
    font-weight: 600;
}

.footer-col a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-mute);
    font-size: 13px;
    padding: 5px 0;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--line);
    padding: 20px 0;
    text-align: center;
    color: var(--text-faint);
    font-size: 12px;
}

.footer-bottom a {
    color: var(--primary);
}

/* ===================================================================
   返回顶部
   =================================================================== */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 48px;
    height: 48px;
    background: var(--grad-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px var(--primary-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 50;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
}

/* ===================================================================
   动画入场
   =================================================================== */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.in {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================================
   响应式
   =================================================================== */
@media (max-width: 1100px) {
    .biz-grid { grid-template-columns: repeat(3, 1fr); }
    .biz-card-wide { grid-column: span 3; }
    .clients-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 900px) {
    .nav-menu { display: none; }
    .hero-stats {
        flex-direction: column;
        gap: 20px;
        padding: 24px;
    }
    .stat-divider {
        width: 60px;
        height: 1px;
    }
    .biz-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-card-wide { grid-column: span 2; }
    .music-grid { grid-template-columns: 1fr; }
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 600px) {
    .section { padding: 70px 16px; }
    .hero { padding: 110px 16px 60px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .biz-grid { grid-template-columns: 1fr; }
    .biz-card-wide { grid-column: span 1; }
    .clients-grid { grid-template-columns: 1fr 1fr; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
    .nav-container { padding: 0 16px; }
    .nav-cta { padding: 8px 14px; font-size: 12px; }
    .logo-text { font-size: 16px; }
    .qr-image { width: 200px; height: 200px; }
}