/* ============================================
   木兰序 MULANXU - 赛博东方浪漫主义样式体系
   Cyber-Oriental Romanticism Design System
   ============================================ */

/* ===================== CSS变量定义 ===================== */
:root {
    /* 核心色彩 - 深色主题 */
    --bg-deep: #0a0a0f;
    --bg-surface: #111118;
    --bg-elevated: #1a1a24;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-strong: rgba(255, 255, 255, 0.06);
    
    /* 强调色系 */
    --accent-purple: #d946ef;
    --accent-cyan: #22d3ee;
    --accent-orange: #fb923c;
    --accent-green: #4ade80;
    --accent-pink: #f472b6;
    
    /* 渐变 */
    --gradient-main: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-cyan) 100%);
    --gradient-warm: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-pink) 100%);
    --gradient-cool: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-green) 100%);
    
    /* 文字颜色 */
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-code: #22d3ee;
    
    /* 边框和阴影 */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(217, 70, 239, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow-purple: 0 0 30px rgba(217, 70, 239, 0.3);
    --shadow-glow-cyan: 0 0 30px rgba(34, 211, 238, 0.3);
    
    /* 字体系统 */
    /* 字体系统 - 情感女性化、杂志感升级 */
    --font-display: 'Playfair Display', 'Noto Serif SC', 'PingFang SC', serif;
    --font-accent: 'Cormorant Garamond', 'Noto Serif SC', serif;
    --font-body: 'Manrope', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'Space Mono', 'JetBrains Mono', monospace;
    
    /* 间距系统 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* 动画曲线 */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
}

/* 浅色主题覆盖 */
[data-theme="light"] {
    --bg-deep: #fafafa;
    --bg-surface: #ffffff;
    --bg-elevated: #f4f4f5;
    --bg-glass: rgba(0, 0, 0, 0.02);
    --bg-glass-strong: rgba(0, 0, 0, 0.04);
    
    --text-primary: #111118;
    --text-secondary: #3a3a42;
    --text-muted: #6b6b78;
    
    --border-subtle: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(217, 70, 239, 0.4);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
}

/* 浅色模式卡片动感底图 */
[data-theme="light"] .scene-card,
[data-theme="light"] .feature-card,
[data-theme="light"] .club-stat-item,
[data-theme="light"] .club-activity-item,
[data-theme="light"] .floor-card,
[data-theme="light"] .faq-item {
    position: relative;
    overflow: hidden;
}

[data-theme="light"] .scene-card::before,
[data-theme="light"] .feature-card::before,
[data-theme="light"] .club-stat-item::before,
[data-theme="light"] .club-activity-item::before,
[data-theme="light"] .floor-card::before,
[data-theme="light"] .faq-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(217, 70, 239, 0.03) 35%,
        rgba(34, 211, 238, 0.03) 40%,
        transparent 45%
    );
    animation: cardShimmer 8s ease-in-out infinite;
    pointer-events: none;
}

/* ===================== 全局重置与基础样式 ===================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: clip;
    max-width: 100vw;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: clip;
    max-width: 100vw;
    width: 100%;
    cursor: auto;
    transition: background-color 0.6s ease, color 0.6s ease;
}

::selection {
    background-color: var(--accent-purple);
    color: white;
}

/* ===================== 背景层系统 ===================== */
.bg-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -10;
}

.bg-gradient {
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(217, 70, 239, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(34, 211, 238, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(251, 146, 60, 0.04) 0%, transparent 60%),
        var(--bg-deep);
    animation: bgPulse 20s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { opacity: 1; }
    100% { opacity: 0.85; }
}

.bg-grid {
    background-image: 
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.15;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
}

.bg-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -5;
    opacity: 0.6;
}

/* ==================== 导航栏 - 统一三列布局 ==================== */
/* LOGO + 主菜单 居中 · 主题/语言 在右 */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 1.1rem 2.5rem;
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    background: rgba(10, 10, 15, 0.78);
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.4s ease;
    max-width: 100vw;
    width: 100%;
    overflow-x: clip;
}

.site-header.scrolled {
    background: rgba(10, 10, 15, 0.92);
    padding: 0.85rem 2.5rem;
    border-bottom-color: var(--border-subtle);
}

/* 三列 grid：左(LOGO) / 中(主菜单居中) / 右(操作) */
.main-nav {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 2rem;
}

.header-left {
    display: flex;
    align-items: center;
    justify-self: start;
}

.header-center {
    display: flex;
    align-items: center;
    justify-content: center;
    justify-self: center;
    gap: 1rem;
}

.logo-group {
    display: inline-flex;
    align-items: baseline;
    text-decoration: none;
    gap: 0.3rem;
    transition: opacity 0.3s ease;
}
.logo-group:hover { opacity: 0.85; }

.brand-primary {
    font-family: var(--font-display);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.06em;
    line-height: 1;
}

.trademark {
    font-size: 0.5em;
    vertical-align: super;
    color: var(--accent-purple);
    font-weight: 400;
}

.nav-main {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-main li { list-style: none; }

.nav-link {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.05em;
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 18px; height: 2px;
    background: var(--gradient-main);
    border-radius: 1px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    justify-self: end;
}

.theme-toggle {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: all 0.3s ease;
}
.theme-toggle:hover {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    transform: rotate(180deg);
}

.hamburger {
    display: none;
    width: 36px;
    height: 36px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}
.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.35s ease;
    transform-origin: center;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==================== 语言切换器 ==================== */
.lang-switcher { position: relative; }

.lang-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--bg-glass);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
}
.lang-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    list-style: none;
    margin: 0;
    padding: 0.4rem 0;
    min-width: 130px;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    z-index: 1100;
}
.lang-switcher.open .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.lang-dropdown li { list-style: none; }
.lang-dropdown li a {
    display: block;
    padding: 0.55rem 1rem;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.lang-dropdown li.active a,
.lang-dropdown li a:hover {
    color: var(--accent-cyan);
    background: rgba(34,211,238,0.06);
}

/* ==================== 1024px 中等屏幕适配 ==================== */
@media (max-width: 1100px) {
    .header-center { gap: 1.5rem; }
    .nav-main { gap: 0.2rem; }
    .nav-link { font-size: 0.88rem; padding: 0.4rem 0.65rem; }
}

@media (max-width: 768px) {
    .site-header { padding: 0.75rem 1rem; }
    .main-nav { grid-template-columns: auto 1fr auto; gap: 0.5rem; }
    .header-center { gap: 0.6rem; flex-wrap: nowrap; }
    .brand-primary { font-size: 1.1rem; }
    .nav-hamburger { display: flex; }
    .nav-main {
        position: fixed;
        top: 60px; left: 0; right: 0;
        flex-direction: column;
        background: var(--bg-primary);
        padding: 1.5rem 0;
        border-bottom: 1px solid var(--border-subtle);
        box-shadow: 0 8px 32px rgba(0,0,0,0.4);
        transform: translateY(-150%);
        transition: transform 0.35s ease;
        z-index: 999;
    }
    .nav-main.open { transform: translateY(0); }
    .nav-link { font-size: 1rem; padding: 0.7rem 1.5rem; width: 100%; text-align: center; border-radius: 0; }
    .header-right { gap: 0.4rem; }
    .lang-btn { padding: 0.35rem 0.55rem; font-size: 0.72rem; }
    .theme-toggle { width: 32px; height: 32px; }
}

/* ==================== 移动端遮罩 ==================== */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
    z-index: 998;
}

.mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ==================== 首屏英雄区 ==================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 4rem 4rem;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.hero-left {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-purple);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    overflow: hidden;
}

.typing-text {
    position: relative;
}

.typing-text::after {
    content: '|';
    animation: blink 1s step-end infinite;
    color: var(--accent-purple);
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: 0.02em;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: titleReveal 0.8s var(--ease-out-expo) forwards;
}

.line-1 { animation-delay: 0.2s; }
.line-2 { animation-delay: 0.45s; }
.line-3 { animation-delay: 0.7s; }

@keyframes titleReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.9;
    max-width: 480px;
    font-weight: 300;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out-expo) 0.9s forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-desc {
    transform: translateY(20px);
}

.hero-actions {
    display: flex;
    gap: 1.25rem;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out-expo) 1.1s forwards;
    transform: translateY(20px);
}

/* 产品信任指标 */
.trust-indicators {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out-expo) 1.3s forwards;
    transform: translateY(15px);
}

.trust-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.trust-item strong {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 600;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.trust-item span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 1rem 2rem;
    border-radius: 999px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px rgba(217, 70, 239, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), 0 0 35px rgba(217, 70, 239, 0.35);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 0.95rem;
}

.pulse-glow {
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 20px rgba(217, 70, 239, 0.2); }
    50% { box-shadow: var(--shadow-md), 0 0 40px rgba(217, 70, 239, 0.45); }
}

/* Hero右侧Canvas区域 */
.hero-right {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 5 / 6;
    border-radius: 24px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg), 0 0 60px rgba(217, 70, 239, 0.1);
}

.canvas-wrapper canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.canvas-overlay {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent-green);
    opacity: 0.7;
    pointer-events: none;
}

.vertical-art-text {
    position: absolute;
    right: -3rem;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    color: var(--text-muted);
    white-space: nowrap;
    opacity: 0.5;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    animation: fadeInUp 1s var(--ease-out-expo) 1.5s both;
}

.scroll-indicator span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

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

@keyframes scrollWheel {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(10px); opacity: 0.2; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ==================== 场景展示区 ==================== */
.scenes-section {
    padding: 8rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-purple);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 400;
    margin-bottom: 1rem;
    letter-spacing: 0.01em;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 300;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.scene-card {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 6rem;
    padding: 3rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo);
}

.scene-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow-purple);
    transform: translateY(-5px);
}

.scene-card.scene-starlight {
    grid-template-columns: 1fr 1.2fr;
}

.scene-card.scene-starlight .scene-content {
    order: -1;
}

.scene-canvas-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-subtle);
}

.scene-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.scene-content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.scene-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.scene-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-weight: 300;
}

.scene-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.4rem 0.9rem;
    background: rgba(217, 70, 239, 0.1);
    border: 1px solid rgba(217, 70, 239, 0.2);
    border-radius: 999px;
    color: var(--accent-purple);
    letter-spacing: 0.05em;
}

/* 分割线 */
.divider-scroll {
    width: 100%;
    padding: 3rem 0;
    opacity: 0.5;
}

/* ==================== 核心能力区 ==================== */
.features-section {
    padding: 8rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.feature-card {
    position: relative;
    padding: 2.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--ease-out-expo);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
}

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

.card-offset-up {
    margin-top: 2rem;
}

.card-offset-down {
    margin-top: -2rem;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.feature-card:hover .card-glow {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 1.5rem;
    color: var(--accent-cyan);
    transition: transform 0.4s var(--ease-out-expo);
}

.feature-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.card-text {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.75;
    font-weight: 300;
}

.card-waveform,
.card-particles-preview {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

.waveform-canvas,
.particles-preview-canvas {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0.7;
}

/* 卡片价值指标 */
.card-value-prop {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(217, 70, 239, 0.08) 0%, rgba(34, 211, 238, 0.06) 100%);
    border-radius: 12px;
    border: 1px solid rgba(217, 70, 239, 0.15);
}

.value-number {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-purple);
    line-height: 1;
}

.value-label {
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 300;
    line-height: 1.3;
}

/* 核心价值总结区块 */
.value-summary {
    margin-top: 4rem;
    padding: 2.5rem 3rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(217, 70, 239, 0.05) 0%, rgba(34, 211, 238, 0.04) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.value-summary blockquote {
    font-family: var(--font-body);
    font-size: 1.15rem;
    line-height: 1.85;
    color: var(--text-primary);
    font-weight: 300;
    margin-bottom: 1.25rem;
    border: none;
    padding: 0;
}

.value-summary blockquote em {
    color: var(--accent-purple);
    font-style: normal;
    font-weight: 400;
}

.value-summary cite {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    font-style: normal;
}

/* ==================== 技术实力矩阵 ==================== */
.tech-credentials-section {
    padding: 8rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.tech-matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 2rem;
}

.tech-matrix-card {
    padding: 2.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.5s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.tech-matrix-card:hover {
    transform: translateY(-5px);
}

.card-highlight-purple:hover {
    border-color: rgba(217, 70, 239, 0.4);
    box-shadow: var(--shadow-lg), var(--shadow-glow-purple);
}

.card-highlight-cyan:hover {
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
}

.card-highlight-orange:hover {
    border-color: rgba(251, 146, 60, 0.4);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(251, 146, 60, 0.25);
}

.tech-matrix-card:nth-child(3) {
    grid-column: 1 / -1;
}

.matrix-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.matrix-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.matrix-stats {
    margin-bottom: 1rem;
}

.matrix-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(217, 70, 239, 0.12) 0%, rgba(217, 70, 239, 0.04) 100%);
    border-radius: 16px;
    border: 1px solid rgba(217, 70, 239, 0.15);
}

.stat-big {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 0.35rem;
}

.matrix-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.75;
    font-weight: 300;
    margin-bottom: 1.25rem;
}

.matrix-tags {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.matrix-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.35rem 0.85rem;
    background: rgba(217, 70, 239, 0.1);
    border: 1px solid rgba(217, 70, 239, 0.18);
    border-radius: 999px;
    color: var(--accent-purple);
    letter-spacing: 0.04em;
}

/* 模型列表 */
.matrix-model-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.model-item {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.45rem 0.85rem;
    background: rgba(34, 211, 238, 0.07);
    border: 1px solid rgba(34, 211, 238, 0.15);
    border-radius: 8px;
    color: var(--accent-cyan);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.model-item:hover {
    background: rgba(34, 211, 238, 0.15);
    transform: translateY(-2px);
}

/* 东方智慧网格 */
.wisdom-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.wisdom-item {
    padding: 1.5rem;
    background: rgba(251, 146, 60, 0.05);
    border: 1px solid rgba(251, 146, 60, 0.12);
    border-radius: 14px;
    text-align: center;
    transition: all 0.3s ease;
}

.wisdom-item:hover {
    background: rgba(251, 146, 60, 0.1);
    border-color: rgba(251, 146, 60, 0.25);
    transform: translateY(-3px);
}

.wisdom-emoji {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.6rem;
}

.wisdom-name {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent-orange);
    display: block;
    margin-bottom: 0.4rem;
}

.wisdom-detail {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.55;
    font-weight: 300;
}

/* ==================== 线下俱乐部 ==================== */
.club-section {
    padding: 8rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.club-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2.5rem;
    margin-top: 2rem;
}

/* 左侧面板：数据 + 九大活动 */
.club-left-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.club-stats-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.club-stat-item {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.08) 0%, rgba(251, 146, 60, 0.02) 100%);
    border: 1px solid rgba(251, 146, 60, 0.15);
    border-radius: 14px;
    text-align: center;
    transition: all 0.4s var(--ease-out-expo);
}

.club-stat-item:hover {
    border-color: rgba(251, 146, 60, 0.35);
    transform: translateY(-3px);
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.12) 0%, rgba(251, 146, 60, 0.04) 100%);
}

.club-stat-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-orange);
    display: block;
    line-height: 1.2;
}

.club-stat-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: 0.3rem;
    display: block;
}

.club-address {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.25rem;
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.address-icon {
    font-size: 1rem;
}

.club-activities-panel {
    padding: 1.75rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 左侧活动面板：无底图 */
.club-panel-left::before {
    display: none;
}

/* 右侧楼层面板 */
.club-floors-panel {
    padding: 1.75rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.club-floors-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('../images/01.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.05;
    pointer-events: none;
}

.floors-panel-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-orange);
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
}

.club-activities-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-orange);
    margin-bottom: 1.25rem;
}

.club-activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.club-activity-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.club-activity-item:hover {
    background: rgba(251, 146, 60, 0.06);
    border-color: rgba(251, 146, 60, 0.2);
    transform: translateX(4px);
}

.club-activity-item.item-highlight {
    background: rgba(251, 146, 60, 0.05);
    border-color: rgba(251, 146, 60, 0.18);
}

.club-activity-item.item-highlight:hover {
    background: rgba(251, 146, 60, 0.1);
    border-color: rgba(251, 146, 60, 0.35);
}

.act-icon {
    font-size: 1.35rem;
    flex-shrink: 0;
}

.act-name {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}

.act-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* O2O流程条 */
.club-o2o-bar {
    margin-top: 3rem;
    padding: 2rem 2.5rem;
    background: linear-gradient(135deg, rgba(217, 70, 239, 0.04) 0%, rgba(34, 211, 238, 0.04) 50%, rgba(251, 146, 60, 0.04) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    backdrop-filter: blur(8px);
}

.o2o-steps {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.o2o-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.o2o-step-num {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.o2o-step-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
    white-space: nowrap;
}

.o2o-arrow {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 1rem;
    opacity: 0.5;
}

.btn-club-more {
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-pink) 100%);
    color: white;
    border: none;
    box-shadow: 0 8px 24px rgba(251, 146, 60, 0.25);
    flex-shrink: 0;
    white-space: nowrap;
}

.btn-club-more:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(251, 146, 60, 0.4);
}

/* 楼层卡片网格 - 单列堆叠，每张卡片独立展示 */
.club-floors-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.25rem;
    position: relative;
    z-index: 1;
}

.floor-card {
    position: relative;
    aspect-ratio: 21 / 9;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid rgba(251, 146, 60, 0.15);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.floor-card:hover {
    border-color: rgba(251, 146, 60, 0.45);
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(251, 146, 60, 0.15);
}

.floor-card-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    filter: contrast(1.08) saturate(1.1) brightness(0.82);
}

.floor-card:hover .floor-card-img {
    transform: scale(1.08);
    filter: contrast(1.15) saturate(1.25) brightness(1);
}

.floor-card-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    z-index: 2;
    background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 15, 0.92) 60%, rgba(10, 10, 15, 0.98) 100%);
}

.floor-num {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--accent-orange);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.3rem;
}

.floor-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    line-height: 1.3;
    margin-bottom: 0.25rem;
}

.floor-desc {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.5);
    display: block;
    line-height: 1.4;
    margin-bottom: 0.6rem;
}

.floor-tags {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.floor-tag {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 0.2rem 0.55rem;
    background: rgba(251, 146, 60, 0.12);
    border: 1px solid rgba(251, 146, 60, 0.22);
    border-radius: 999px;
    color: var(--accent-orange);
    letter-spacing: 0.04em;
}

/* ==================== 品牌理念沉浸区 ==================== */
.philosophy-section {
    position: relative;
    padding: 10rem 4rem;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.philosophy-bg-canvas-wrap {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.philosophy-bg-canvas-wrap canvas {
    width: 100%;
    height: 100%;
    opacity: 0.15;
}

.philosophy-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 5rem;
    align-items: start;
}

.philosophy-quote {
    position: sticky;
    top: 50%;
    transform: translateY(-50%);
}

.philosophy-quote blockquote {
    position: relative;
    padding: 2rem 0;
}

.quote-mark {
    font-family: var(--font-display);
    font-size: 8rem;
    line-height: 0.5;
    color: var(--accent-purple);
    opacity: 0.2;
    display: block;
    margin-bottom: 1rem;
}

.quote-text {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 400;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.philosophy-quote cite {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: normal;
    letter-spacing: 0.1em;
}

.philosophy-body {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.body-block h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

.body-block h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.25em;
    bottom: 0.25em;
    width: 3px;
    background: var(--gradient-main);
    border-radius: 2px;
}

.body-block p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.85;
    font-weight: 300;
}

.body-delay {
    padding-left: 2rem;
}

/* ==================== 下载转化区 ==================== */
.download-section {
    position: relative;
    padding: 10rem 4rem;
    text-align: center;
    overflow: hidden;
}

.download-bg-art {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.download-bg-art canvas {
    width: 100%;
    height: 100%;
    opacity: 0.08;
}

.download-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.download-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.3;
}

.download-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.download-actions {
    display: flex;
    gap: 1.25rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.download-note {
    margin-top: 2rem;
}

.code-snippet {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-green);
    background: rgba(74, 222, 128, 0.08);
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    border: 1px solid rgba(74, 222, 128, 0.15);
    letter-spacing: 0.05em;
}

/* ==================== 页脚 ==================== */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 4rem;
    background: var(--bg-surface);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-subtle);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.footer-tagline {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    letter-spacing: 0.15em;
}

.footer-links {
    display: flex;
    gap: 2.5rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--accent-cyan);
}

.footer-code-stream {
    width: 300px;
    height: 30px;
    opacity: 0.4;
}

.footer-code-stream canvas {
    width: 100%;
    height: 100%;
}

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 300;
}

.footer-tech {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
}

/* ==================== 滚动动画系统 ==================== */
.scroll-animate {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.9s var(--ease-out-expo);
}

.scroll-animate.show {
    opacity: 1;
    transform: translateY(0);
}

.scroll-animate[data-delay] {
    transition-delay: calc(var(--delay) * 1ms);
}

/* ==================== FAQ 常见问题 ==================== */
.faq-section {
    padding: 7rem 0;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.faq-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse 500px 300px at 30% 20%, rgba(217,70,239,0.03) 0%, transparent 70%),
        radial-gradient(ellipse 400px 250px at 70% 80%, rgba(34,211,238,0.03) 0%, transparent 70%);
    pointer-events: none;
}

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.faq-item {
    background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(217,70,239,0.15);
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
}

.faq-item[open] {
    border-color: rgba(217,70,239,0.2);
    background: linear-gradient(135deg, rgba(217,70,239,0.04) 0%, rgba(34,211,238,0.02) 100%);
}

.faq-item[open] .faq-icon {
    transform: rotate(45deg);
    color: var(--accent-purple);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: all 0.2s ease;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-q-text {
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0.02em;
    flex: 1;
    padding-right: 1rem;
}

.faq-icon {
    font-family: 'Space Mono', monospace;
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--accent-cyan);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(34,211,238,0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem 1.5rem;
    animation: faqSlideIn 0.35s ease-out;
}

@keyframes faqSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.faq-answer p {
    font-size: 0.88rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-answer ul,
.faq-answer ol {
    padding-left: 1.2rem;
    margin-bottom: 0.75rem;
}

.faq-answer li {
    font-size: 0.87rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.faq-answer strong {
    color: var(--text-primary);
    font-weight: 600;
}

.faq-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.faq-link:hover {
    color: var(--accent-purple);
    text-decoration: underline;
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 1200px) {
    .hero-container {
        gap: 3rem;
    }
    
    .canvas-wrapper {
        max-width: 400px;
    }
    
    .philosophy-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .philosophy-quote {
        position: static;
        transform: none;
        text-align: center;
    }
}

@media (max-width: 1024px) {
    header {
        padding: 1rem 2rem;
    }

    .hamburger {
        display: flex;
    }

    .nav-group {
        position: fixed;
        top: 0;
        left: -280px;
        width: 260px;
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--bg-deep);
        border-right: 1px solid var(--border-subtle);
        padding: 5rem 1.5rem 2rem;
        z-index: 999;
        transition: left 0.35s ease;
        overflow-y: auto;
    }

    .nav-group.open {
        left: 0;
    }

    .nav-group .nav-link {
        font-size: 0.95rem;
        letter-spacing: 0.08em;
        text-transform: none;
        padding: 0.9rem 0;
        border-bottom: 1px solid rgba(255,255,255,0.04);
        color: var(--text-secondary);
        font-family: 'Noto Sans SC', sans-serif;
    }

    .nav-group .nav-link:hover,
    .nav-group .nav-link.active {
        color: var(--accent-cyan);
    }

    .nav-group .nav-link::after { display: none; }
    
    .hero-section {
        padding: 7rem 2rem 3rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-left {
        align-items: center;
    }
    
    .hero-desc {
        max-width: 100%;
    }
    
    .hero-right {
        margin-top: 3rem;
    }
    
    .vertical-art-text {
        display: none;
    }
    
    .scene-card {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }
    
    .scene-card.scene-starlight .scene-content {
        order: 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .card-offset-up,
    .card-offset-down {
        margin-top: 0;
    }
    
    .scenes-section,
    .features-section,
    .philosophy-section,
    .download-section {
        padding: 5rem 2rem;
    }

    .tech-credentials-section {
        padding: 5rem 2rem;
    }

    .tech-matrix-grid {
        grid-template-columns: 1fr;
    }

    .club-section {
        padding: 5rem 2rem;
        overflow-x: hidden;
    }

    .club-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .club-left-panel,
    .club-floors-panel {
        width: 100%;
    }

    .club-o2o-bar {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    body {
        cursor: auto;
        overflow-x: hidden;
    }

    .club-section {
        padding: 4rem 1.25rem;
    }

    /* 手机端：楼层卡片优先全宽展示，大图冲击力 */
    .club-grid {
        display: flex !important;
        flex-direction: column-reverse !important;
        gap: 2rem;
    }

    .club-left-panel,
    .club-floors-panel {
        width: 100% !important;
        padding: 0;
        background: transparent;
        border: none;
        backdrop-filter: none;
    }

    .club-floors-panel::before { display: none; }

    /* 楼层卡片：手机端全宽大图 */
    .floors-panel-title {
        font-size: 1.15rem;
        margin-bottom: 1rem;
        padding-left: 0.25rem;
    }

    .club-floors-grid {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .floor-card {
        width: 100%;
        border-radius: 16px;
        overflow: hidden;
    }

    .floor-card-img {
        height: 200px;
        background-size: cover;
        background-position: center;
    }

    .floor-card-info {
        padding: 1rem 1.25rem;
    }

    .floor-num {
        font-size: 0.65rem;
    }

    .floor-name {
        font-size: 1rem;
    }

    .floor-desc {
        font-size: 0.78rem;
        margin-top: 0.25rem;
    }

    /* 数据指标：横向滚动条 */
    .club-stats-panel {
        display: flex;
        flex-direction: row;
        gap: 0.75rem;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .club-stats-panel::-webkit-scrollbar { display: none; }

    .club-stat-item {
        flex-shrink: 0;
        min-width: 100px;
        padding: 1rem 1.25rem;
    }

    .club-stat-num {
        font-size: 1.5rem;
    }

    /* 地址单独一行 */
    .club-address {
        display: none;
    }

    /* 九大活动：3列图标网格，更大气 */
    .club-activities-panel {
        padding: 1.25rem 0;
        background: transparent;
        border: none;
    }

    .club-activities-title {
        font-size: 1.1rem;
        margin-bottom: 1rem;
        padding-left: 0.25rem;
    }

    .club-activity-list {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }

    .club-activity-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1rem 0.5rem;
        border-radius: 14px;
        gap: 0.35rem;
    }

    .club-activity-item:hover {
        transform: translateY(-2px);
    }

    .act-icon {
        font-size: 1.8rem;
    }

    .act-name {
        font-size: 0.8rem;
        white-space: normal;
    }

    .act-desc {
        display: none;
    }
    
    .cursor {
        display: none;
    }
    
    .logo-cn {
        font-size: 1.2rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
        font-size: 0.85rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .scene-card {
        padding: 2rem 1.5rem;
        margin-bottom: 3rem;
    }
    
    .feature-card {
        padding: 2rem;
    }

    .card-value-prop {
        padding: 0.85rem 1rem;
    }

    .value-number {
        font-size: 1.4rem;
    }

    .value-summary {
        padding: 2rem 1.5rem;
        margin-top: 3rem;
    }

    .value-summary blockquote {
        font-size: 1rem;
    }

    .tech-matrix-card {
        padding: 1.75rem;
    }

    .stat-big {
        font-size: 2.2rem;
    }

    .wisdom-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .club-activity-list {
        grid-template-columns: 1fr;
    }

    .club-floors-grid {
        flex-direction: column;
        gap: 0.85rem;
    }

    .floor-card {
        aspect-ratio: 16 / 9;
    }

    .floor-card-info {
        padding: 0.75rem;
    }

    .floor-name {
        font-size: 0.88rem;
    }
    
    .o2o-steps {
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.5rem;
    }
    
    .footer-col {
        align-items: center;
        gap: 0.4rem;
    }
    
    .footer-code-stream {
        display: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .quote-text {
        font-size: 1.75rem;
    }
    
    .body-delay {
        padding-left: 0;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .download-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .download-actions .btn {
        width: 100%;
    }
}

/* ==================== 品牌宣传片区 ==================== */
.video-section {
    padding: 4rem 4rem 6rem;
    max-width: 1400px;
    margin: 0 auto;
}

.video-container {
    max-width: 960px;
    margin: 0 auto;
}

.video-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.video-header .section-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.25em;
    color: var(--accent-purple);
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.video-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.video-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.video-player-wrap {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: #000;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
}

.video-player-wrap::before {
    content: '';
    display: block;
    padding-top: 56.25%;
}

.video-player-wrap:hover {
    border-color: var(--border-hover);
}

.promo-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #000;
}

.video-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.6) 100%);
    transition: opacity 0.4s ease;
    z-index: 5;
}

.video-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.play-btn {
    width: 80px;
    height: 80px;
    color: #fff;
    transition: transform 0.3s ease, filter 0.3s ease;
    filter: drop-shadow(0 0 20px rgba(217, 70, 239, 0.4));
}

.play-btn svg {
    width: 100%;
    height: 100%;
}

.video-player-wrap:hover .play-btn {
    transform: scale(1.1);
    filter: drop-shadow(0 0 30px rgba(217, 70, 239, 0.6));
}

.play-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.15em;
    margin-top: 1rem;
    text-transform: uppercase;
}

.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.85));
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-player-wrap:hover .video-controls,
.video-player-wrap.playing .video-controls {
    opacity: 1;
}

.vc-btn {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.vc-btn:hover {
    opacity: 1;
}

.vc-btn svg {
    width: 20px;
    height: 20px;
}

.vc-progress {
    flex: 1;
    height: 4px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    position: relative;
    cursor: pointer;
    transition: height 0.15s ease;
}

.vc-progress:hover {
    height: 6px;
}

.vc-progress-bar {
    height: 100%;
    background: var(--gradient-main);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s linear;
    position: relative;
    z-index: 2;
}

.vc-progress-buffered {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: rgba(255,255,255,0.15);
    border-radius: 2px;
    width: 0%;
    z-index: 1;
}

.vc-time {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(255,255,255,0.7);
    white-space: nowrap;
    min-width: 80px;
    text-align: center;
}

.video-player-wrap:fullscreen,
.video-player-wrap:-webkit-full-screen {
    border-radius: 0;
    border: none;
}

.video-player-wrap:fullscreen .promo-video,
.video-player-wrap:-webkit-full-screen .promo-video {
    object-fit: contain;
}

.video-player-wrap:fullscreen .video-controls,
.video-player-wrap:-webkit-full-screen .video-controls {
    opacity: 1;
    padding: 1rem 2rem;
}

@media (max-width: 768px) {
    .video-section {
        padding: 2rem 1rem 3rem;
    }

    .video-header {
        margin-bottom: 1.25rem;
    }

    .video-title {
        font-size: 1.2rem;
    }

    .video-subtitle {
        font-size: 0.85rem;
    }

    .video-player-wrap {
        border-radius: 10px;
        max-width: 100%;
    }

    .play-btn {
        width: 56px;
        height: 56px;
    }

    .play-label {
        font-size: 0.6rem;
        margin-top: 0.6rem;
    }

    .video-controls {
        padding: 0.4rem 0.6rem;
        gap: 0.4rem;
        opacity: 1;
    }

    .vc-btn svg {
        width: 16px;
        height: 16px;
    }

    .vc-time {
        font-size: 0.55rem;
        min-width: 55px;
    }
}

@media (max-width: 480px) {
    .video-section {
        padding: 1.5rem 0.75rem 2.5rem;
    }

    .video-title {
        font-size: 1.05rem;
    }

    .play-btn {
        width: 48px;
        height: 48px;
    }

    .play-label {
        display: none;
    }

    .video-controls {
        gap: 0.3rem;
        padding: 0.35rem 0.5rem;
    }

    .vc-btn svg {
        width: 14px;
        height: 14px;
    }

    .vc-time {
        font-size: 0.5rem;
        min-width: 48px;
    }
}

@media (orientation: landscape) and (max-width: 900px) {
    .video-section {
        padding: 1.5rem 2rem 2rem;
    }

    .video-header {
        margin-bottom: 1rem;
    }

    .video-player-wrap {
        max-height: 70vh;
    }
}

/* ==================== 减少动画偏好支持 ==================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .scroll-animate {
        opacity: 1;
        transform: none;
    }
}