/* ============================================
   MIXLAB - 混音知识库 科技感样式
   深色赛博朋克主题 | 霓虹光效 | 玻璃态
   ============================================ */

:root {
    --bg-primary: #05070e;
    --bg-secondary: #0a0f1f;
    --bg-tertiary: #0d1529;
    --bg-card: rgba(13, 21, 41, 0.7);
    --cyan: #00f5ff;
    --magenta: #ff00ea;
    --purple: #8b5cf6;
    --blue: #3b82f6;
    --green: #10f5a0;
    --yellow: #ffd166;
    --orange: #ff6b35;
    --text-primary: #e8edf5;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    --border-glow: rgba(0, 245, 255, 0.3);
    --glass-bg: rgba(13, 21, 41, 0.55);
    --glass-border: rgba(0, 245, 255, 0.15);
    --shadow-neon-cyan: 0 0 20px rgba(0, 245, 255, 0.4), 0 0 40px rgba(0, 245, 255, 0.15);
    --shadow-neon-magenta: 0 0 20px rgba(255, 0, 234, 0.4), 0 0 40px rgba(255, 0, 234, 0.15);
    --gradient-primary: linear-gradient(135deg, var(--cyan) 0%, var(--magenta) 100%);
    --gradient-text: linear-gradient(135deg, #00f5ff 0%, #8b5cf6 50%, #ff00ea 100%);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ========== 背景动效 ========== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

nav, section, footer, .modal-overlay {
    position: relative;
    z-index: 10;
}

/* ========== 玻璃态基础 ========== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.glass-nav {
    background: rgba(5, 7, 14, 0.75);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 245, 255, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 18px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.logo-icon {
    width: 40px;
    height: 40px;
    filter: drop-shadow(0 0 8px rgba(0, 245, 255, 0.5));
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(0, 245, 255, 0.5)); }
    50% { filter: drop-shadow(0 0 16px rgba(255, 0, 234, 0.6)); }
}

.logo-text {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--text-primary);
}

.logo-accent {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    position: relative;
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 20px;
    letter-spacing: 1.5px;
    transition: all 0.3s ease;
    border-radius: 8px;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 8px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
    filter: blur(10px);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 0.15;
}

.nav-link.active {
    color: var(--cyan);
    text-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 28px;
    height: 2px;
    background: var(--cyan);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ========== 容器 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ========== Hero 区域 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 40px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 30%, rgba(0, 245, 255, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 70%, rgba(255, 0, 234, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
}

.hero-waves {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0.4;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(180deg, transparent 0%, var(--cyan) 100%);
    opacity: 0.05;
    border-radius: 50% 50% 0 0 / 100% 100% 0 0;
    animation: wave 8s ease-in-out infinite;
}

.wave-1 {
    background: linear-gradient(180deg, transparent 0%, rgba(0, 245, 255, 0.8) 100%);
    animation-delay: 0s;
    transform: translateY(20%) scaleX(1.2);
}

.wave-2 {
    background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.8) 100%);
    animation-delay: -2s;
    transform: translateY(30%) scaleX(1.4);
}

.wave-3 {
    background: linear-gradient(180deg, transparent 0%, rgba(255, 0, 234, 0.8) 100%);
    animation-delay: -4s;
    transform: translateY(40%) scaleX(1.6);
}

@keyframes wave {
    0%, 100% { border-radius: 50% 50% 0 0 / 100% 100% 0 0; }
    50% { border-radius: 30% 70% 0 0 / 80% 120% 0 0; }
}

.hero-content {
    max-width: 1000px;
    text-align: center;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(0, 245, 255, 0.08);
    border: 1px solid rgba(0, 245, 255, 0.25);
    border-radius: 100px;
    margin-bottom: 40px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--cyan);
    letter-spacing: 2px;
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(42px, 7vw, 84px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 28px;
    letter-spacing: 2px;
}

.title-line {
    display: block;
    color: var(--text-primary);
}

.title-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient-shift 4s ease infinite;
    filter: drop-shadow(0 0 30px rgba(0, 245, 255, 0.3));
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: clamp(16px, 1.5vw, 20px);
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.7;
    font-weight: 400;
}

/* ========== 搜索框 ========== */
.search-container {
    max-width: 720px;
    margin: 0 auto 40px;
    position: relative;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 8px 8px 24px;
    border-radius: 100px;
    transition: all 0.3s ease;
    position: relative;
}

.search-box:hover,
.search-box:focus-within {
    border-color: rgba(0, 245, 255, 0.4);
    box-shadow: var(--shadow-neon-cyan);
    transform: translateY(-2px);
}

.search-icon {
    width: 22px;
    height: 22px;
    color: var(--cyan);
    flex-shrink: 0;
}

#searchInput {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 17px;
    padding: 14px 8px;
}

#searchInput::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 14px 32px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 100px;
    color: #000;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.search-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--magenta) 0%, var(--cyan) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.search-btn span, .search-btn {
    position: relative;
    z-index: 1;
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-neon-cyan), var(--shadow-neon-magenta);
}

.search-btn:hover::before {
    opacity: 1;
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    max-height: 360px;
    overflow-y: auto;
    border-radius: 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 50;
}

.search-suggestions.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0, 245, 255, 0.05);
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover {
    background: rgba(0, 245, 255, 0.08);
    padding-left: 32px;
}

.suggestion-cat {
    padding: 4px 10px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.suggestion-cat.effects { background: rgba(0, 245, 255, 0.15); color: var(--cyan); }
.suggestion-cat.processing { background: rgba(139, 92, 246, 0.15); color: var(--purple); }
.suggestion-cat.spatial { background: rgba(16, 245, 160, 0.15); color: var(--green); }
.suggestion-cat.dynamics { background: rgba(255, 209, 102, 0.15); color: var(--yellow); }
.suggestion-cat.tonal { background: rgba(255, 0, 234, 0.15); color: var(--magenta); }

.suggestion-text {
    font-size: 15px;
    font-weight: 500;
}

.suggestion-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

.suggestion-empty {
    padding: 32px;
    text-align: center;
    color: var(--text-muted);
}

.hero-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.tag-btn {
    padding: 7px 16px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 100px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tag-btn:hover {
    background: rgba(0, 245, 255, 0.12);
    border-color: var(--cyan);
    color: var(--cyan);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 245, 255, 0.2);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 2;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--cyan);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
    box-shadow: 0 0 12px rgba(0, 245, 255, 0.3);
}

.mouse-wheel {
    width: 3px;
    height: 8px;
    background: var(--cyan);
    border-radius: 2px;
    animation: mouse-scroll 2s ease-in-out infinite;
}

@keyframes mouse-scroll {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0; }
}

.scroll-indicator span {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* ========== Section 通用 ========== */
.section {
    padding: 120px 0;
    position: relative;
}

.section-alt {
    background: linear-gradient(180deg, transparent 0%, rgba(10, 15, 31, 0.6) 50%, transparent 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.section-num {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--cyan);
    font-weight: 500;
    letter-spacing: 3px;
}

.section-line {
    width: 80px;
    height: 1px;
    background: var(--gradient-primary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4.5vw, 52px);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* ========== 术语库 ========== */
.filters {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 48px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    flex-shrink: 0;
}

.filter-chips {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.chip {
    padding: 8px 18px;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.chip:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.chip.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #000;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(0, 245, 255, 0.3);
}

.alphabet-nav {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    padding: 16px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
}

.alpha-btn {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.alpha-btn:hover:not(:disabled) {
    color: var(--cyan);
    border-color: rgba(0, 245, 255, 0.3);
    background: rgba(0, 245, 255, 0.05);
}

.alpha-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}

.alpha-btn.active {
    background: var(--cyan);
    color: #000;
    font-weight: 700;
    box-shadow: 0 0 16px rgba(0, 245, 255, 0.5);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 28px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.4) 0%, transparent 40%, rgba(255, 0, 234, 0.4) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(0, 245, 255, 0.08), transparent 30%, transparent 70%, rgba(255, 0, 234, 0.08), transparent);
    animation: rotate-border 8s linear infinite;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

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

.card:hover {
    transform: translateY(-6px);
    border-color: transparent;
}

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

.card:hover::after {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 26px;
    position: relative;
}

.card-icon.effects {
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.2) 0%, rgba(0, 245, 255, 0.05) 100%);
    color: var(--cyan);
    border: 1px solid rgba(0, 245, 255, 0.3);
}

.card-icon.processing {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(139, 92, 246, 0.05) 100%);
    color: var(--purple);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.card-icon.spatial {
    background: linear-gradient(135deg, rgba(16, 245, 160, 0.2) 0%, rgba(16, 245, 160, 0.05) 100%);
    color: var(--green);
    border: 1px solid rgba(16, 245, 160, 0.3);
}

.card-icon.dynamics {
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.2) 0%, rgba(255, 209, 102, 0.05) 100%);
    color: var(--yellow);
    border: 1px solid rgba(255, 209, 102, 0.3);
}

.card-icon.tonal {
    background: linear-gradient(135deg, rgba(255, 0, 234, 0.2) 0%, rgba(255, 0, 234, 0.05) 100%);
    color: var(--magenta);
    border: 1px solid rgba(255, 0, 234, 0.3);
}

.card-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.card-title-en {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin-bottom: 14px;
    display: block;
}

.card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 245, 255, 0.08);
}

.card-cat {
    padding: 4px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 1px;
}

.card-cat.effects { background: rgba(0, 245, 255, 0.15); color: var(--cyan); }
.card-cat.processing { background: rgba(139, 92, 246, 0.15); color: var(--purple); }
.card-cat.spatial { background: rgba(16, 245, 160, 0.15); color: var(--green); }
.card-cat.dynamics { background: rgba(255, 209, 102, 0.15); color: var(--yellow); }
.card-cat.tonal { background: rgba(255, 0, 234, 0.15); color: var(--magenta); }

.card-read {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 500;
    color: var(--cyan);
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.card-read svg {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.card:hover .card-read {
    gap: 10px;
    text-shadow: 0 0 8px rgba(0, 245, 255, 0.6);
}

.card:hover .card-read svg {
    transform: translateX(4px);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 40px;
    color: var(--text-muted);
}

.no-results-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.no-results-text {
    font-family: var(--font-display);
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* ========== 运作逻辑 ========== */
.mechanics-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.signal-chain-visual {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    margin-bottom: 8px;
}

.signal-chain-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--cyan);
    margin-bottom: 36px;
    letter-spacing: 1.5px;
}

.signal-chain-title svg {
    width: 24px;
    height: 24px;
}

.signal-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.signal-node {
    flex: 1;
    min-width: 140px;
    max-width: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.signal-node-box {
    width: 100%;
    padding: 20px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    text-align: center;
    transition: all 0.4s ease;
    cursor: pointer;
    position: relative;
    z-index: 2;
}

.signal-node:hover .signal-node-box {
    border-color: var(--cyan);
    transform: translateY(-4px);
    box-shadow: var(--shadow-neon-cyan);
}

.signal-node-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.signal-node-name {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.signal-node-en {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.signal-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    min-width: 30px;
    position: relative;
    z-index: 1;
}

.signal-arrow::before {
    content: '';
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.5;
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.4);
    animation: signal-flow 2s ease-in-out infinite;
}

@keyframes signal-flow {
    0%, 100% { transform: scaleX(1); opacity: 0.3; }
    50% { transform: scaleX(1); opacity: 0.8; }
}

.signal-arrow svg {
    width: 20px;
    height: 20px;
    color: var(--cyan);
    flex-shrink: 0;
    margin-left: -8px;
}

.mechanics-tabs {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
}

.tabs-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.tab-btn-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: rgba(139, 92, 246, 0.15);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: rgba(0, 245, 255, 0.3);
    color: var(--text-primary);
    transform: translateX(4px);
}

.tab-btn.active {
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.12) 0%, rgba(255, 0, 234, 0.08) 100%);
    border-color: var(--cyan);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(0, 245, 255, 0.15);
}

.tab-btn.active .tab-btn-icon {
    background: var(--gradient-primary);
    color: #000;
}

.tab-content {
    padding: 36px;
    min-height: 400px;
    animation: fade-slide 0.5s ease;
}

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

.tab-content h3 {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.tab-content h3 .title-gradient {
    font-size: 26px;
}

.tab-subtitle {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
    letter-spacing: 1px;
}

.tab-section {
    margin-bottom: 28px;
}

.tab-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--cyan);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.tab-section-title::before {
    content: '▸';
    color: var(--magenta);
}

.tab-section p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.tab-section ul {
    list-style: none;
    padding-left: 8px;
}

.tab-section li {
    position: relative;
    padding: 8px 0 8px 24px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.tab-section li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 18px;
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 245, 255, 0.5);
}

.tab-params {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.param-item {
    padding: 16px;
    background: rgba(13, 21, 41, 0.6);
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.param-item:hover {
    border-color: rgba(0, 245, 255, 0.3);
    transform: translateY(-2px);
}

.param-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.param-range {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--cyan);
    padding: 2px 8px;
    background: rgba(0, 245, 255, 0.1);
    border-radius: 4px;
}

.param-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.process-steps {
    position: relative;
    padding-left: 28px;
}

.process-steps::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan) 0%, var(--magenta) 100%);
    border-radius: 2px;
}

.process-step {
    position: relative;
    padding: 12px 0 24px 20px;
}

.process-step::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 16px;
    width: 14px;
    height: 14px;
    background: var(--bg-tertiary);
    border: 2px solid var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(0, 245, 255, 0.5);
}

.step-num {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--cyan);
    letter-spacing: 1.5px;
    margin-bottom: 4px;
}

.step-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.step-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== 历史时间线 ========== */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan) 0%, var(--purple) 50%, var(--magenta) 100%);
    transform: translateX(-50%);
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.3);
}

.timeline-item {
    position: relative;
    display: flex;
    width: 100%;
    margin-bottom: 48px;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 32px;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: var(--bg-tertiary);
    border: 3px solid var(--cyan);
    border-radius: 50%;
    z-index: 3;
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.6), inset 0 0 10px rgba(0, 245, 255, 0.3);
}

.timeline-dot::after {
    content: '';
    position: absolute;
    inset: 4px;
    background: var(--gradient-primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.timeline-content {
    width: calc(50% - 48px);
    position: relative;
}

.timeline-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 28px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.timeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.timeline-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 245, 255, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 245, 255, 0.1);
}

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

.timeline-year {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    color: var(--cyan);
    padding: 6px 14px;
    background: rgba(0, 245, 255, 0.1);
    border: 1px solid rgba(0, 245, 255, 0.25);
    border-radius: 8px;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.timeline-year::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--cyan);
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
    letter-spacing: 0.5px;
}

.timeline-era {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--magenta);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.timeline-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 16px;
}

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

.timeline-tag {
    padding: 4px 12px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--purple);
    letter-spacing: 0.5px;
}

/* ========== 页脚 ========== */
.footer {
    position: relative;
    z-index: 10;
    padding: 60px 0 0;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    padding-bottom: 48px;
}

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

.footer-desc {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 400px;
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 18px;
    letter-spacing: 1.5px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.footer-col a,
.footer-col span {
    display: block;
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-col a:hover {
    color: var(--cyan);
    padding-left: 8px;
}

.footer-bottom {
    text-align: center;
    padding: 24px 40px;
    border-top: 1px solid rgba(0, 245, 255, 0.08);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* ========== Modal ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 7, 14, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 24px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 820px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 48px;
    position: relative;
    transform: translateY(20px) scale(0.98);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 0, 234, 0.1);
    border: 1px solid rgba(255, 0, 234, 0.25);
    color: var(--magenta);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 0, 234, 0.2);
    transform: rotate(90deg);
    box-shadow: 0 0 16px rgba(255, 0, 234, 0.4);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-content h2 {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.modal-title-en {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: block;
}

.modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.modal-image {
    width: 100%;
    height: 240px;
    border-radius: 16px;
    margin-bottom: 28px;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.1) 100%);
}

.modal-image-icon {
    font-size: 80px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
}

.modal-section {
    margin-bottom: 28px;
}

.modal-section h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--cyan);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.modal-section h4::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.modal-section p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 10px;
}

.modal-section ul {
    list-style: none;
    padding-left: 4px;
}

.modal-section li {
    position: relative;
    padding: 6px 0 6px 22px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.modal-section li::before {
    content: '◆';
    position: absolute;
    left: 0;
    top: 6px;
    color: var(--cyan);
    font-size: 10px;
}

.tips-list {
    list-style: none;
    padding: 0;
}

.tips-list li {
    position: relative;
    padding: 14px 16px 14px 44px;
    margin-bottom: 12px;
    background: rgba(16, 245, 160, 0.05);
    border: 1px solid rgba(16, 245, 160, 0.15);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.tips-list li::before {
    content: '💡';
    position: absolute;
    left: 14px;
    top: 14px;
    font-size: 18px;
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--cyan), var(--magenta));
    border-radius: 10px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--magenta), var(--cyan));
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .mechanics-tabs {
        grid-template-columns: 1fr;
    }
    .tabs-nav {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 4px;
    }
    .tab-btn {
        flex-shrink: 0;
        flex-direction: column;
        gap: 8px;
        padding: 12px 16px;
        min-width: 120px;
        text-align: center;
    }
    .timeline::before {
        left: 24px;
    }
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
    }
    .timeline-dot {
        left: 24px;
    }
    .timeline-content {
        width: calc(100% - 64px);
        margin-left: 64px;
    }
    .signal-flow {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    .signal-node {
        max-width: 320px;
        width: 100%;
    }
    .signal-arrow {
        transform: rotate(90deg);
        min-height: 30px;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 16px 24px;
    }
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(5, 7, 14, 0.98);
        backdrop-filter: blur(24px);
        padding: 24px;
        gap: 4px;
        transform: translateY(-120%);
        transition: transform 0.4s ease;
        border-bottom: 1px solid var(--glass-border);
    }
    .nav-links.active {
        transform: translateY(0);
    }
    .nav-link {
        padding: 14px 20px;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    .container {
        padding: 0 24px;
    }
    .hero {
        padding: 100px 24px 60px;
    }
    .hero-badge {
        font-size: 10px;
        padding: 6px 14px;
        letter-spacing: 1px;
    }
    .search-box {
        flex-direction: column;
        padding: 16px;
        border-radius: 20px;
        gap: 12px;
    }
    .search-btn {
        width: 100%;
    }
    .hero-tags {
        justify-content: flex-start;
    }
    .tag {
        width: 100%;
    }
    .section {
        padding: 80px 0;
    }
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .modal {
        padding: 28px 24px;
    }
    .modal-content h2 {
        font-size: 24px;
    }
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   DAW 卡片样式
   ============================================ */

.daw-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.daw-card {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(0, 245, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
}

.daw-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.15), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.daw-image {
    position: relative;
    height: 180px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.daw-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
    transition: opacity 0.3s ease, transform 0.4s ease;
}

.daw-card:hover .daw-image img {
    opacity: 0.9;
    transform: scale(1.05);
}

.daw-icon {
    position: absolute;
    font-size: 48px;
    z-index: 2;
    text-shadow: 0 0 20px currentColor;
}

.daw-body {
    padding: 24px;
}

.daw-name {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    text-shadow: 0 0 12px currentColor;
}

.daw-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.daw-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.daw-meta-item {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.daw-meta-item strong {
    color: var(--text-secondary);
    margin-right: 4px;
}

.daw-features {
    margin-bottom: 20px;
}

.daw-feature {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.daw-bullet {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: #05070e !important;
    font-weight: 700;
    margin-top: 2px;
}

.daw-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.daw-best {
    font-size: 12px;
    padding: 4px 12px;
    border: 1px solid;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-weight: 500;
}

.daw-link {
    font-size: 13px;
    padding: 6px 16px;
    border: 1px solid;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.daw-link:hover {
    background: currentColor;
    color: #05070e !important;
}

/* ============================================
   混音师卡片样式
   ============================================ */

.engineer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.engineer-card {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 0, 234, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
}

.engineer-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 0 30px rgba(255, 0, 234, 0.15), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.engineer-image {
    position: relative;
    height: 240px;
    overflow: hidden;
}

.engineer-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.engineer-card:hover .engineer-image img {
    transform: scale(1.05);
}

.engineer-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 40%, rgba(5, 7, 14, 0.9) 100%);
    pointer-events: none;
}

.engineer-body {
    padding: 24px;
}

.engineer-name {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.engineer-name-cn {
    font-size: 13px;
    color: var(--text-muted);
    font-family: var(--font-body);
    display: block;
    margin-bottom: 12px;
}

.engineer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.engineer-tag {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 20px;
    background: rgba(0, 245, 255, 0.08);
    color: var(--cyan);
    font-family: var(--font-mono);
    border: 1px solid rgba(0, 245, 255, 0.15);
}

.engineer-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.engineer-section {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.engineer-section strong {
    display: block;
    font-size: 12px;
    color: var(--magenta);
    font-family: var(--font-mono);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.engineer-works {
    list-style: none;
    padding: 0;
}

.engineer-works li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
    line-height: 1.4;
}

.engineer-works li::before {
    content: '♪';
    position: absolute;
    left: 0;
    color: var(--cyan);
    font-size: 12px;
}

.engineer-sig {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.engineer-sig strong {
    font-size: 12px;
    color: var(--purple);
    font-family: var(--font-mono);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.engineer-sig span {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ===== 新增板块样式 ===== */

/* 导航 CTA 按钮 */
.nav-cta {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: #fff;
    border: none;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}
.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 245, 255, 0.3);
}

/* Hero CTA */
.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-decoration: none;
    font-family: inherit;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 245, 255, 0.4);
}
.btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--cyan);
}
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 16px; font-size: 13px; }

/* Hero features */
.hero-features {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-top: 40px;
    flex-wrap: wrap;
}
.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}
.hero-feature svg { width: 20px; height: 20px; color: var(--cyan); }

/* 制作人助手 */
.assistant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.tool-card {
    padding: 32px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
}
.tool-card:hover { transform: translateY(-5px); }
.tool-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,245,255,0.2), rgba(255,0,234,0.2));
    display: flex;
    align-items: center;
    justify-content: center;
}
.tool-icon svg { width: 32px; height: 32px; color: var(--cyan); }
.tool-title { font-size: 20px; margin-bottom: 8px; }
.tool-desc { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }

.bpm-display {
    font-size: 48px;
    font-weight: 700;
    color: var(--cyan);
    margin-bottom: 16px;
    font-family: var(--font-mono);
}
.bpm-display span { font-size: 18px; color: var(--text-secondary); }
.bpm-info { font-size: 13px; color: var(--text-secondary); margin-top: 12px; }

.key-display {
    font-size: 32px;
    font-weight: 700;
    color: var(--purple);
    margin-bottom: 20px;
    padding: 16px;
    background: rgba(255,0,234,0.1);
    border-radius: 12px;
}
.key-list { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.key-list span {
    padding: 4px 12px;
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    font-size: 13px;
    font-family: var(--font-mono);
}

.calc-input { display: flex; gap: 8px; margin-bottom: 20px; }
.calc-input input {
    flex: 1;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    color: var(--text);
    font-size: 16px;
}
.calc-result {
    text-align: left;
    font-size: 14px;
    line-height: 2;
    color: var(--text-secondary);
}
.calc-result .row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.calc-result .val { color: var(--cyan); font-family: var(--font-mono); }

/* 行业周报 */
.weekly-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.weekly-card {
    padding: 28px;
    border-radius: 16px;
    transition: all 0.3s;
}
.weekly-card:hover { transform: translateY(-5px); }
.weekly-issue {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}
.weekly-title { font-size: 18px; margin-bottom: 12px; line-height: 1.4; }
.weekly-summary { color: var(--text-secondary); font-size: 14px; margin-bottom: 16px; line-height: 1.6; }
.weekly-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.weekly-link { color: var(--cyan); font-size: 14px; text-decoration: none; }

/* 周报精选卡片 */
.weekly-featured {
    grid-column: 1 / -1;
    padding: 40px;
}
.weekly-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}
.weekly-stats span {
    padding: 6px 14px;
    background: rgba(0, 245, 255, 0.08);
    border-radius: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}
.weekly-stats strong { color: var(--cyan); font-family: var(--font-mono); }
.weekly-sections {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
}
.weekly-read-btn {
    display: inline-block;
    padding: 11px 26px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}
.weekly-read-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 245, 255, 0.35);
}

/* 作品展示 */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.portfolio-card {
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
}
.portfolio-card:hover { transform: translateY(-5px); }
.portfolio-cover {
    height: 160px;
    position: relative;
}
.portfolio-cover::after {
    content: '▶';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255,255,255,0.8);
    font-size: 32px;
}
.portfolio-info { padding: 20px; }
.portfolio-info h3 { font-size: 17px; margin-bottom: 10px; }
.portfolio-tags { display: flex; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.portfolio-tags span {
    padding: 2px 10px;
    background: rgba(0,245,255,0.1);
    color: var(--cyan);
    border-radius: 10px;
    font-size: 12px;
}
.portfolio-info p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.section-cta { text-align: center; margin-top: 40px; }

/* 资源中心 */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.resource-card {
    padding: 28px;
    border-radius: 16px;
    transition: all 0.3s;
    position: relative;
}
.resource-card:hover { transform: translateY(-5px); }
.resource-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0,245,255,0.15);
    color: var(--cyan);
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}
.resource-title { font-size: 18px; margin-bottom: 10px; }
.resource-desc { color: var(--text-secondary); font-size: 14px; line-height: 1.6; margin-bottom: 16px; }
.resource-tags { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.resource-tags span {
    padding: 2px 10px;
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    font-size: 12px;
}
.resource-download {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: #fff;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
}

/* 服务与课程 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.service-card {
    padding: 32px;
    border-radius: 16px;
    transition: all 0.3s;
    position: relative;
}
.service-card.featured {
    border: 2px solid var(--cyan);
    box-shadow: 0 0 30px rgba(0,245,255,0.15);
}
.service-card:hover { transform: translateY(-5px); }
.service-badge {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}
.service-title { font-size: 20px; margin-bottom: 20px; }
.service-list { list-style: none; padding: 0; margin-bottom: 24px; }
.service-list li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* 关于我们 */
.about-content {
    padding: 48px;
    border-radius: 20px;
    margin-top: 48px;
}
.about-text h3 { font-size: 24px; margin-bottom: 16px; }
.about-text p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 32px; }
.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 24px;
}
.stat { text-align: center; }
.stat-num {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-family: var(--font-mono);
}
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* 联系弹窗 */
#contactModal .modal {
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    max-width: 360px;
    width: 90%;
    position: relative;
}
#contactModal .modal-close {
    position: absolute;
    top: 16px; right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}
.modal-title { font-size: 22px; margin-bottom: 8px; }
.modal-subtitle { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.modal-qr {
    width: 220px;
    height: 220px;
    margin: 0 auto 16px;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}
.modal-qr img { width: 100%; height: 100%; object-fit: cover; }
.modal-tip { font-size: 14px; color: var(--cyan); }

/* 详情弹窗内容 */
.detail-title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 20px;
    padding-right: 48px;
}
.detail-body { line-height: 1.85; }
.detail-body h3 {
    font-size: 17px;
    color: var(--cyan);
    margin: 26px 0 10px;
    font-family: var(--font-display);
    letter-spacing: 1px;
}
.detail-body p { font-size: 15px; color: var(--text-secondary); margin-bottom: 12px; }
.detail-body .detail-lead {
    font-size: 15px;
    color: var(--text);
    padding: 16px 20px;
    background: rgba(0, 245, 255, 0.06);
    border-left: 3px solid var(--cyan);
    border-radius: 8px;
    margin-bottom: 20px;
}
.detail-body ul { padding-left: 20px; margin-bottom: 12px; }
.detail-body li {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    list-style: disc;
}
.detail-body strong { color: var(--text); }

/* 页脚社媒 */
.social-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.social-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 16px;
    background: rgba(255,255,255,0.05);
    transition: all 0.3s;
}
.social-link:hover { color: var(--cyan); background: rgba(0,245,255,0.1); }
.social-link svg { width: 16px; height: 16px; }
.footer-id { font-size: 12px; color: var(--text-muted); margin-top: 8px; }
.footer-note { font-size: 12px; color: var(--text-muted); margin-top: 12px; display: block; }
.footer-col .btn { margin-top: 8px; }

/* Responsive additions */
@media (max-width: 768px) {
    .nav-cta { display: none; }
    .hero-features { gap: 16px; }
    .assistant-grid, .weekly-grid, .portfolio-grid, .resources-grid, .services-grid {
        grid-template-columns: 1fr;
    }
    .about-content { padding: 24px; }
    .modal-qr { width: 180px; height: 180px; }
}