/* 七夕传统文化网站样式表 */

/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS变量定义 - 七夕传统色彩 ===== */
:root {
    /* 七夕传统色彩 */
    --color-crimson: #DC143C;        /* 绛红 */
    --color-magpie-blue: #4A6FA5;    /* 鹊羽蓝 */
    --color-golden-magpie: #DAA520;   /* 金鹊黄 */
    --color-jade-white: #F8F8FF;     /* 玉白 */
    --color-ink-black: #2C2C2C;      /* 墨黑 */
    --color-light-gold: #FFF8DC;     /* 浅金 */
    --color-chinese-red: #CD212A;    /* 中国红 */
    --color-gold-accent: #FFD700;    /* 金色点缀 */
    
    /* 渐变色彩 */
    --gradient-night-sky: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-day-sky: linear-gradient(135deg, #87CEEB 0%, #98D8E8 50%, #B0E0E6 100%);
    --gradient-sunset: linear-gradient(45deg, var(--color-crimson) 0%, var(--color-golden-magpie) 100%);
    
    /* 字体 */
    --font-chinese: 'Noto Serif SC', serif;
    --font-modern: 'Inter', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* 阴影 */
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-medium: 0 8px 30px rgba(0,0,0,0.15);
    --shadow-strong: 0 12px 40px rgba(0,0,0,0.2);
    
    /* 动画时间 */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s ease-out;
    --transition-slow: 0.6s ease-in-out;
}

/* ===== 日夜模式变量 ===== */
.day-mode {
    --bg-primary: var(--color-jade-white);
    --bg-secondary: var(--color-light-gold);
    --text-primary: var(--color-ink-black);
    --text-secondary: #555555;
    --text-accent: var(--color-crimson);
    --nav-bg: rgba(248, 248, 255, 0.95);
    --card-bg: #ffffff;
    --border-color: #e6e6e6;
}

.night-mode {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --text-primary: var(--color-jade-white);
    --text-secondary: #cccccc;
    --text-accent: var(--color-golden-magpie);
    --nav-bg: rgba(26, 26, 46, 0.95);
    --card-bg: #2a2a4a;
    --border-color: #444464;
}

/* ===== 基础排版 ===== */
body {
    font-family: var(--font-chinese);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all var(--transition-smooth);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== 导航栏样式 ===== */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar {
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-accent);
    font-family: var(--font-chinese);
}

.logo-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: var(--font-modern);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 400;
    position: relative;
    transition: all var(--transition-fast);
    padding: var(--spacing-xs) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-crimson), var(--color-golden-magpie));
    transition: width var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    padding: var(--spacing-xs);
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-smooth);
    font-size: 1.2rem;
}

.theme-toggle:hover {
    border-color: var(--text-accent);
    transform: scale(1.05);
}

.night-mode .sun-icon {
    display: none;
}

.day-mode .moon-icon {
    display: none;
}

/* ===== 主视觉区域 ===== */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--gradient-day-sky);
    overflow: hidden;
}

.night-mode .hero {
    background: var(--gradient-night-sky);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.stars-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, white, transparent),
        radial-gradient(2px 2px at 40px 70px, white, transparent),
        radial-gradient(1px 1px at 90px 40px, white, transparent),
        radial-gradient(1px 1px at 130px 80px, white, transparent),
        radial-gradient(2px 2px at 160px 30px, white, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: twinkle 3s ease-in-out infinite alternate;
    opacity: 0;
}

.night-mode .stars-layer {
    opacity: 0.6;
}

@keyframes twinkle {
    0% { opacity: 0.3; }
    100% { opacity: 0.8; }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: left;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-accent);
    margin-bottom: var(--spacing-xs);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-family: var(--font-modern);
    font-weight: 300;
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

/* ===== 倒计时组件 ===== */
.countdown-container {
    margin-top: var(--spacing-lg);
}

.countdown-container h3 {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.time-unit {
    text-align: center;
    background: var(--card-bg);
    padding: var(--spacing-sm);
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    min-width: 80px;
    transition: all var(--transition-smooth);
}

.time-unit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.time-unit .number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-accent);
    font-family: var(--font-modern);
}

.time-unit .label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== 章节标题样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gradient-sunset);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-family: var(--font-modern);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .title-main {
        font-size: 3rem;
    }
    
    .countdown {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .time-unit {
        min-width: 60px;
        padding: var(--spacing-xs);
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* ===== 故事时间轴样式 ===== */
.story-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.story-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.story-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-sunset);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: 0;
    margin-right: 55%;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 55%;
    margin-right: 0;
    text-align: left;
}

.timeline-content {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 15px;
    box-shadow: var(--shadow-soft);
    position: relative;
    transition: all var(--transition-smooth);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.timeline-content h3 {
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--text-secondary);
    margin: 0;
}

.timeline-icon {
    position: absolute;
    left: 50%;
    top: 20px;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 3px solid var(--text-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 1;
}

/* ===== 诗词卡片样式 ===== */
.poetry-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.poetry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.poetry-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    transition: all var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.poetry-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-strong);
}

.poetry-card.featured {
    grid-column: 1 / -1;
    max-width: 600px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--bg-secondary) 100%);
}

.poetry-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.poetry-title {
    color: var(--text-accent);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
}

.poetry-author {
    color: var(--text-secondary);
    font-family: var(--font-modern);
    font-size: 1rem;
    margin: 0;
}

.poetry-text {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-chinese);
}

.poetry-appreciation {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: 10px;
    border-left: 4px solid var(--text-accent);
}

.poetry-appreciation p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===== 传统习俗网格样式 ===== */
.customs-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.customs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.custom-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: all var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.custom-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-strong);
}

.custom-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.custom-title {
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
    font-size: 1.4rem;
}

.custom-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===== 祈愿祝福区域样式 ===== */
.wishes-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.wishes-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.wish-form-container {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
}

.wish-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-accent);
    box-shadow: 0 0 0 3px rgba(220, 20, 60, 0.1);
}

.wish-submit-btn {
    background: var(--gradient-sunset);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.wish-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.wishes-wall {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    max-height: 600px;
    overflow-y: auto;
}

.wall-title {
    color: var(--text-accent);
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.wish-item {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: 10px;
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--text-accent);
}

.wish-author {
    font-weight: 600;
    color: var(--text-accent);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.wish-content {
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.wish-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: right;
    margin-top: var(--spacing-xs);
}

/* ===== 页脚样式 ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: var(--text-accent);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* ===== 动画类 ===== */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

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

/* 主视觉区域动画 */
.hero-illustration {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.couple-illustration {
    position: relative;
    width: 300px;
    height: 300px;
}

.weaver-girl,
.cowherd-boy {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: var(--gradient-sunset);
    box-shadow: var(--shadow-soft);
    animation: float 3s ease-in-out infinite;
}

.weaver-girl {
    top: 50px;
    left: 50px;
    background: linear-gradient(45deg, var(--color-magpie-blue), var(--color-golden-magpie));
    animation-delay: 0s;
}

.weaver-girl::before {
    content: '👩‍🎨';
}

.cowherd-boy {
    bottom: 50px;
    right: 50px;
    background: linear-gradient(45deg, var(--color-crimson), var(--color-golden-magpie));
    animation-delay: 1.5s;
}

.cowherd-boy::before {
    content: '👨‍🌾';
}

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

.floating-magpies {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 2px;
    background: var(--gradient-sunset);
    border-radius: 1px;
}

.floating-magpies::before {
    content: '🛫🛫🛫';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.2rem;
    animation: magpie-fly 2s ease-in-out infinite;
}

@keyframes magpie-fly {
    0%, 100% { transform: translateX(-50%) scale(1); }
    50% { transform: translateX(-50%) scale(1.1); }
}

/* 鼠标悬停动效 */
.nav-link {
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left var(--transition-smooth);
}

.nav-link:hover::before {
    left: 100%;
}

.custom-card {
    position: relative;
    overflow: hidden;
}

.custom-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(220,20,60,0.1) 0%, transparent 70%);
    transform: scale(0);
    transition: transform var(--transition-smooth);
}

.custom-card:hover::before {
    transform: scale(1);
}

.poetry-card {
    position: relative;
    overflow: hidden;
}

.poetry-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(218,165,32,0.05), rgba(76,111,165,0.05));
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

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

/* 按钮动效 */
.wish-submit-btn {
    position: relative;
    overflow: hidden;
}

.wish-submit-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.wish-submit-btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-sparkle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.btn-sparkle::before,
.btn-sparkle::after {
    content: '✨';
    position: absolute;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.7);
    animation: sparkle 1.5s ease-in-out infinite;
}

.btn-sparkle::before {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.btn-sparkle::after {
    bottom: 20%;
    right: 20%;
    animation-delay: 0.75s;
}

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

/* 滚动条美化 */
.wishes-wall::-webkit-scrollbar {
    width: 8px;
}

.wishes-wall::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

.wishes-wall::-webkit-scrollbar-thumb {
    background: var(--text-accent);
    border-radius: 4px;
}

.wishes-wall::-webkit-scrollbar-thumb:hover {
    background: var(--color-crimson);
}

/* 加载动画 */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* 粒子效果 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255,255,255,0.1) 2px, transparent 2px),
        radial-gradient(circle at 75% 75%, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: particle-float 20s linear infinite;
    pointer-events: none;
}

@keyframes particle-float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-100px) rotate(360deg); }
}

/* 文字渐现动效 */
.hero-title .title-main {
    animation: title-appear 1s ease-out 0.5s both;
}

.hero-title .title-sub {
    animation: title-appear 1s ease-out 1s both;
}

.hero-description {
    animation: fade-in 1s ease-out 1.5s both;
}

@keyframes title-appear {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

/* 特殊节日效果 */
.celebration-mode .hero {
    position: relative;
    overflow: hidden;
}

.celebration-mode .hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255,215,0,0.1) 10px,
        rgba(255,215,0,0.1) 20px
    );
    animation: celebration-sweep 2s ease-in-out infinite;
}

@keyframes celebration-sweep {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== 移动端响应式优化 ===== */
@media (max-width: 768px) {
    .story-timeline::before {
        left: 20px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 50px;
        margin-right: 0;
        text-align: left;
    }
    
    .timeline-icon {
        left: 20px;
        transform: translateX(-50%);
    }
    
    .poetry-grid {
        grid-template-columns: 1fr;
    }
    
    .customs-grid {
        grid-template-columns: 1fr;
    }
    
    .wishes-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}