/* 
 * 星界传说 - 奇幻科幻融合游戏网站
 * 完整样式表
 * 遵循 web-design-skill 设计规范
 */

/* ===== CSS变量系统 ===== */
:root {
    /* === 色彩系统（基于oklch） === */
    
    /* 奇幻色彩 - 魔法与神秘 */
    --fantasy-purple: oklch(45% 0.25 300);
    --magic-gold: oklch(75% 0.15 90);
    --ancient-parchment: oklch(85% 0.08 80);
    --rune-blue: oklch(55% 0.18 250);
    --dragon-red: oklch(50% 0.22 20);
    
    /* 科幻色彩 - 科技与未来 */
    --sci-fi-blue: oklch(50% 0.2 240);
    --tech-teal: oklch(60% 0.18 200);
    --hologram-cyan: oklch(70% 0.12 190);
    --quantum-green: oklch(65% 0.2 150);
    --neon-pink: oklch(65% 0.25 340);
    
    /* 中性色 - 宇宙与空间 */
    --deep-space: oklch(15% 0.05 280);
    --cosmic-dust: oklch(25% 0.08 280);
    --nebula-gray: oklch(35% 0.06 280);
    --moon-silver: oklch(80% 0.08 280);
    --starlight: oklch(95% 0.01 280);
    --void-black: oklch(5% 0.01 280);
    
    /* 语义色彩 */
    --success: oklch(65% 0.2 145);
    --warning: oklch(75% 0.2 85);
    --error: oklch(65% 0.25 25);
    --info: oklch(65% 0.18 230);
    
    /* === 间距系统 === */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    --space-40: 10rem;
    --space-48: 12rem;
    --space-56: 14rem;
    --space-64: 16rem;
    
    /* === 字体系统 === */
    --font-sci-fi: 'Orbitron', monospace;
    --font-fantasy: 'Cinzel', serif;
    --font-ui: 'Space Grotesk', sans-serif;
    --font-content: 'EB Garamond', serif;
    --font-code: 'JetBrains Mono', monospace;
    
    /* 字体大小 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    --text-8xl: 6rem;
    --text-9xl: 8rem;
    
    /* 行高 */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* === 圆角系统 === */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* === 阴影系统 === */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 奇幻阴影 */
    --shadow-fantasy: 0 0 20px rgba(124, 58, 237, 0.3), 0 0 40px rgba(251, 191, 36, 0.2);
    --shadow-scifi: 0 0 20px rgba(59, 130, 246, 0.3), 0 0 40px rgba(34, 211, 238, 0.2);
    
    /* === 动效系统 === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* === 层级系统 === */
    --z-negative: -1;
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    --z-auto: auto;
}

/* 回退颜色（如果浏览器不支持oklch） */
@supports not (color: oklch(0% 0 0)) {
    :root {
        --fantasy-purple: #7c3aed;
        --magic-gold: #fbbf24;
        --ancient-parchment: #fef3c7;
        --rune-blue: #3b82f6;
        --dragon-red: #dc2626;
        
        --sci-fi-blue: #3b82f6;
        --tech-teal: #0d9488;
        --hologram-cyan: #22d3ee;
        --quantum-green: #10b981;
        --neon-pink: #ec4899;
        
        --deep-space: #0f172a;
        --cosmic-dust: #1e293b;
        --nebula-gray: #334155;
        --moon-silver: #cbd5e1;
        --starlight: #f8fafc;
        --void-black: #020617;
        
        --success: #10b981;
        --warning: #f59e0b;
        --error: #ef4444;
        --info: #3b82f6;
    }
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-ui);
    background-color: var(--deep-space);
    color: var(--starlight);
    line-height: var(--leading-normal);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 背景效果 ===== */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: var(--z-negative);
}

.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(2px 2px at 20% 30%, var(--starlight) 50%, transparent 100%),
        radial-gradient(2px 2px at 40% 70%, var(--moon-silver) 50%, transparent 100%),
        radial-gradient(3px 3px at 60% 20%, var(--magic-gold) 50%, transparent 100%),
        radial-gradient(2px 2px at 80% 50%, var(--hologram-cyan) 50%, transparent 100%);
    background-size: 300px 300px;
    animation: twinkle 8s infinite alternate;
}

.nebula {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, var(--fantasy-purple) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, var(--sci-fi-blue) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, var(--neon-pink) 0%, transparent 40%);
    opacity: 0.15;
    filter: blur(40px);
}

/* 剑与魔法抽象图案 - 左侧 */
.fantasy-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    background: 
        /* 剑的抽象形状 */
        linear-gradient(45deg, transparent 40%, var(--magic-gold) 40%, var(--magic-gold) 45%, transparent 45%) 20% 30% / 100px 300px,
        linear-gradient(-45deg, transparent 40%, var(--magic-gold) 40%, var(--magic-gold) 45%, transparent 45%) 20% 30% / 100px 300px,
        /* 魔法符文 */
        radial-gradient(circle, var(--fantasy-purple) 10%, transparent 10%) 15% 50% / 50px 50px,
        radial-gradient(circle, var(--rune-blue) 15%, transparent 15%) 25% 70% / 70px 70px,
        radial-gradient(circle, var(--magic-gold) 12%, transparent 12%) 35% 40% / 60px 60px,
        /* 魔法能量流 */
        conic-gradient(from 0deg at 30% 60%, 
            transparent 0deg, 
            var(--fantasy-purple) 30deg, 
            transparent 60deg, 
            var(--rune-blue) 90deg, 
            transparent 120deg, 
            var(--magic-gold) 150deg, 
            transparent 180deg) 30% 60% / 200px 200px;
    background-repeat: no-repeat;
    opacity: 0.08;
    animation: fantasyFloat 20s ease-in-out infinite;
    filter: blur(1px);
}

/* 赛博朋克机器人抽象图案 - 右侧 */
.scifi-pattern {
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: 
        /* 机器人轮廓 */
        linear-gradient(90deg, var(--tech-teal) 2px, transparent 2px) 70% 40% / 150px 200px,
        linear-gradient(0deg, var(--hologram-cyan) 2px, transparent 2px) 70% 40% / 150px 200px,
        /* 机械结构 */
        radial-gradient(ellipse at 80% 50%, var(--sci-fi-blue) 5%, transparent 5%) 80% 50% / 100px 150px,
        /* 电路板纹理 */
        repeating-linear-gradient(90deg, 
            transparent, 
            transparent 10px, 
            var(--neon-pink) 10px, 
            var(--neon-pink) 12px) 60% 30% / 200px 100px,
        repeating-linear-gradient(0deg, 
            transparent, 
            transparent 10px, 
            var(--quantum-green) 10px, 
            var(--quantum-green) 12px) 60% 30% / 200px 100px,
        /* 数据流 */
        conic-gradient(from 180deg at 70% 70%, 
            transparent 0deg, 
            var(--hologram-cyan) 45deg, 
            transparent 90deg, 
            var(--neon-pink) 135deg, 
            transparent 180deg, 
            var(--quantum-green) 225deg, 
            transparent 270deg) 70% 70% / 180px 180px;
    background-repeat: no-repeat;
    opacity: 0.08;
    animation: scifiPulse 15s ease-in-out infinite;
    filter: blur(1px);
}

.tech-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--cosmic-dust) 1px, transparent 1px),
        linear-gradient(90deg, var(--cosmic-dust) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.05;
    animation: gridMove 20s linear infinite;
}

/* 网页背景图片层 - 使用Moebius风格的太空艺术作为背景 */
.bg-image-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        url('图片/网页背景/Moebius_Starwatcher_005.jpg'),
        url('图片/网页背景/Moebius_Starwatcher_080.jpg');
    background-size: 60% 100%, 40% 100%;
    background-position: left center, right center;
    background-repeat: no-repeat, no-repeat;
    opacity: 0.06;
    filter: blur(2px) saturate(0.8);
    mix-blend-mode: screen;
    animation: bgImageFade 30s ease-in-out infinite alternate;
}

@keyframes bgImageFade {
    0%, 100% { opacity: 0.04; }
    50% { opacity: 0.08; }
}

/* ===== 动画定义 ===== */
@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px var(--fantasy-purple); }
    50% { box-shadow: 0 0 40px var(--sci-fi-blue); }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

@keyframes hologram {
    0%, 100% { opacity: 0.8; filter: hue-rotate(0deg); }
    50% { opacity: 1; filter: hue-rotate(180deg); }
}

@keyframes fantasyFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(1deg); }
    50% { transform: translateY(0) rotate(0deg); }
    75% { transform: translateY(10px) rotate(-1deg); }
}

@keyframes scifiPulse {
    0%, 100% { opacity: 0.08; transform: scale(1); }
    25% { opacity: 0.12; transform: scale(1.02); }
    50% { opacity: 0.08; transform: scale(1); }
    75% { opacity: 0.10; transform: scale(0.98); }
}

/* ===== 工具类 ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.section {
    padding: var(--space-20) 0;
}

.section-title {
    font-family: var(--font-sci-fi);
    font-size: var(--text-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-12);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: calc(var(--space-4) * -1);
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--fantasy-purple), var(--sci-fi-blue));
}

.fantasy-border {
    border: 2px solid var(--fantasy-purple);
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}

.fantasy-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--magic-gold), 
        transparent);
}

.scifi-border {
    border: 2px solid var(--sci-fi-blue);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.scifi-border::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--hologram-cyan), 
        transparent);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: var(--z-50);
    padding: var(--space-3) 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-lg);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-sci-fi);
    font-weight: 900;
    font-size: var(--text-2xl);
    background: linear-gradient(135deg, var(--fantasy-purple), var(--sci-fi-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-family: var(--font-fantasy);
    font-size: var(--text-sm);
    color: var(--moon-silver);
}

.nav-menu {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.nav-link {
    font-family: var(--font-ui);
    font-weight: 600;
    color: var(--moon-silver);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link::before {
    font-size: var(--text-sm);
}

.nav-link.fantasy::before {
    content: '[符文]';
    color: var(--magic-gold);
}

.nav-link.scifi::before {
    content: '[界面]';
    color: var(--tech-teal);
}

.nav-link:hover {
    color: var(--starlight);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--starlight);
    background: linear-gradient(135deg, 
        rgba(124, 58, 237, 0.2), 
        rgba(59, 130, 246, 0.2));
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--starlight);
    font-size: var(--text-2xl);
    cursor: pointer;
    padding: var(--space-2);
}

/* ===== Hero区域 ===== */
.hero {
    padding-top: var(--space-40);
    padding-bottom: var(--space-20);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-family: var(--font-fantasy);
    font-size: var(--text-7xl);
    font-weight: 900;
    margin-bottom: var(--space-6);
    line-height: var(--leading-tight);
}

.hero-title span {
    display: block;
}

.hero-fantasy {
    color: var(--magic-gold);
    text-shadow: 0 0 30px rgba(251, 191, 36, 0.5);
    animation: pulse 3s infinite;
}

.hero-scifi {
    font-family: var(--font-sci-fi);
    color: var(--hologram-cyan);
    text-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
    animation: pulse 3s infinite 1.5s;
}

.hero-subtitle {
    font-family: var(--font-content);
    font-size: var(--text-2xl);
    font-style: italic;
    color: var(--moon-silver);
    max-width: 800px;
    margin: 0 auto var(--space-12);
    line-height: var(--leading-relaxed);
}

.hero-cta {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    margin-top: var(--space-12);
}

/* ===== 按钮系统 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-xl);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: var(--text-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
    transition: left var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--fantasy-purple), var(--sci-fi-blue));
    color: var(--starlight);
    box-shadow: var(--shadow-fantasy);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(123, 97, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--starlight);
    border: 2px solid var(--tech-teal);
}

.btn-secondary:hover {
    background: rgba(13, 148, 136, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(13, 148, 136, 0.2);
}

.btn-fantasy {
    background: linear-gradient(135deg, var(--fantasy-purple), var(--magic-gold));
    color: var(--void-black);
    font-family: var(--font-fantasy);
}

.btn-scifi {
    background: linear-gradient(135deg, var(--sci-fi-blue), var(--hologram-cyan));
    color: var(--starlight);
    font-family: var(--font-sci-fi);
}

.btn-lg {
    padding: var(--space-6) var(--space-12);
    font-size: var(--text-xl);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

/* ===== 卡片系统 ===== */
.card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-3xl);
    padding: var(--space-8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(124, 58, 237, 0.1), 
        rgba(59, 130, 246, 0.1));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--tech-teal);
    box-shadow: var(--shadow-scifi);
}

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

.card-fantasy {
    border-left: 4px solid var(--fantasy-purple);
}

.card-fantasy::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--fantasy-purple), var(--magic-gold));
}

.card-scifi {
    border-left: 4px solid var(--sci-fi-blue);
}

.card-scifi::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--sci-fi-blue), var(--tech-teal));
}

.card-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.card-title {
    font-family: var(--font-fantasy);
    font-size: var(--text-2xl);
    margin-bottom: var(--space-4);
    color: var(--starlight);
}

.card-content {
    color: var(--moon-silver);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

/* ===== 网格系统 ===== */
.grid {
    display: grid;
    gap: var(--space-8);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== 页脚 ===== */
.footer {
    background: rgba(15, 23, 42, 0.9);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-12) 0;
    margin-top: var(--space-20);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.footer-section h3 {
    font-family: var(--font-sci-fi);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
    color: var(--starlight);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: var(--moon-silver);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--starlight);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--space-8);
    color: var(--moon-silver);
    font-size: var(--text-sm);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--text-6xl);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--text-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-xl);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--deep-space);
        flex-direction: column;
        padding: var(--space-4);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .section-title {
        font-size: var(--text-2xl);
    }
    
    .btn {
        padding: var(--space-3) var(--space-6);
    }
}

/* ===== 特殊效果类 ===== */
.glow-effect {
    animation: glow 2s infinite alternate;
}

.scanline {
    position: relative;
    overflow: hidden;
}

.scanline::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--hologram-cyan), 
        transparent);
    animation: scanline 2s linear infinite;
}

.hologram-effect {
    animation: hologram 3s infinite alternate;
}

.float-effect {
    animation: float 4s ease-in-out infinite;
}

/* ===== 工具提示 ===== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background: var(--cosmic-dust);
    color: var(--starlight);
    text-align: center;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    position: absolute;
    z-index: var(--z-50);
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    font-size: var(--text-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tooltip .tooltip-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: var(--cosmic-dust) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* ===== 加载动画 ===== */
.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--cosmic-dust);
    border-top: 3px solid var(--fantasy-purple);
    border-right: 3px solid var(--sci-fi-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

::-webkit-scrollbar-track {
    background: var(--deep-space);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--fantasy-purple), var(--sci-fi-blue));
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(var(--magic-gold), var(--hologram-cyan));
}

/* ===== 选择文本样式 ===== */
::selection {
    background: rgba(124, 58, 237, 0.3);
    color: var(--starlight);
}

::-moz-selection {
    background: rgba(124, 58, 237, 0.3);
    color: var(--starlight);
}