/* 移动端轻量级样式 - 优化加载速度 */
:root {
    --primary-color: #ff6b9d;
    --secondary-color: #f093fb;
    --accent-color: #ffeaa7;
    --text-color: #2d3436;
    --light-text: #636e72;
    --background: linear-gradient(135deg, #ffeaa7 0%, #ff9a9e 50%, #fecfef 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1rem;
    position: relative;
}

/* 简化的加载器 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
}

.loader-heart {
    font-size: 3rem;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 容器 */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header h2 {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

/* 主网格 - 移动端单列 */
.main-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

/* 按钮样式 */
button {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

button:hover, button:active {
    transform: scale(0.98);
}

/* 情书模块 */
.love-letter {
    text-align: center;
}

.love-letter button {
    margin: 0 auto;
    display: block;
    width: fit-content;
}

.letter-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    margin-top: 1rem;
}

.letter-content.show {
    max-height: 500px;
}

.letter-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
    text-align: left;
}

.signature {
    text-align: right;
    font-style: italic;
    color: var(--light-text);
    font-size: 0.8rem;
    margin-top: 1rem;
    opacity: 0.8;
    font-weight: 300;
}

/* 照片墙 - 简化版 */
.gallery {
    text-align: center;
}

.slideshow-container {
    position: relative;
    max-width: 100%;
    margin: auto;
    border-radius: 15px;
    overflow: hidden;
    height: 300px;
}

.slide {
    display: none;
    width: 100%;
    height: 100%;
}

.slide.active {
    display: block;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
}

.dots-container {
    text-align: center;
    margin-top: 1rem;
}

.dot {
    height: 12px;
    width: 12px;
    margin: 0 5px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.dot.active, .dot:hover {
    background-color: var(--primary-color);
}

/* 生日蛋糕 - PC端样式移植 */
.cake-module {
    text-align: center;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: visible;
}

.cake-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
    perspective: 1000px;
    position: relative;
    transform-style: preserve-3d;
}

.cake {
    position: relative;
    width: 280px;
    height: 220px;
    margin: 1rem auto;
    transform-style: preserve-3d;
    animation: cakeFloat 8s ease-in-out infinite;
}

@keyframes cakeFloat {
    0%, 100% {
        transform: translateY(0px) rotateY(0deg);
    }
    50% {
        transform: translateY(-5px) rotateY(1deg);
    }
}

.plate {
    width: 250px;
    height: 20px;
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #fdf2e9 0%, #fef7ed 30%, #fff8f0 70%, #fdf2e9 100%);
    border-radius: 50%;
    box-shadow:
        0 2px 0 #f4a261,
        0 4px 0 #e76f51,
        0 8px 20px rgba(231, 111, 81, 0.3),
        inset 0 2px 4px rgba(255,255,255,0.8),
        inset 0 -1px 3px rgba(244, 162, 97, 0.2);
    border: 1px solid rgba(244, 162, 97, 0.3);
    z-index: 1;
}

/* 3D立体蛋糕层 */
.layer {
    position: absolute;
    left: 50%;
    border-radius: 12px;
    box-sizing: border-box;
    transform-style: preserve-3d;
    box-shadow:
        0 3px 8px rgba(0,0,0,0.15),
        inset 0 -2px 4px rgba(0,0,0,0.1),
        inset 0 2px 4px rgba(255,255,255,0.3);
    border: 2px solid rgba(255,255,255,0.4);
}

.layer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background: inherit;
    transform: translateZ(-15px);
    filter: brightness(0.75);
    box-shadow: 0 0 10px rgba(0,0,0,0.25);
}

/* 蛋糕层样式 */
.layer-bottom {
    width: 200px;
    height: 50px;
    bottom: 5px;
    transform: translateX(-50%);
    background: linear-gradient(145deg, #ffb3ba 0%, #ffdfba 50%, #ffffba 100%);
    z-index: 5;
}

.layer-middle {
    width: 150px;
    height: 40px;
    bottom: 50px;
    transform: translateX(-50%);
    background: linear-gradient(145deg, #ffdfba 0%, #ffffba 50%, #baffc9 100%);
    z-index: 10;
}

.layer-top {
    width: 100px;
    height: 30px;
    bottom: 85px;
    transform: translateX(-50%);
    background: linear-gradient(145deg, #ffffba 0%, #baffc9 50%, #bae1ff 100%);
    z-index: 12;
}

/* 奶油装饰 */
.icing {
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 20px;
    background: linear-gradient(135deg, #fff 0%, #f8f8ff 50%, #fff 100%);
    border-radius: 50%;
    box-shadow:
        0 2px 4px rgba(0,0,0,0.1),
        inset 0 1px 2px rgba(255,255,255,0.8);
    z-index: 13;
}

/* 奶油滴落效果 */
.drip {
    position: absolute;
    background: linear-gradient(135deg, #fff 0%, #f8f8ff 100%);
    border-radius: 0 0 50% 50%;
    z-index: 8;
}

.drip1 {
    bottom: 95px;
    left: 25%;
    width: 12px;
    height: 18px;
    transform: skewY(5deg);
}

.drip2 {
    bottom: 90px;
    right: 25%;
    width: 15px;
    height: 22px;
    transform: skewY(-8deg);
}

.drip3 {
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 15px;
}

/* 蜡烛容器 - 移动端优化 */
.candles {
    position: absolute;
    top: -55px;
    left: 50%;
    transform: translateX(-50%);
    width: 250px;
    height: 100px;
    z-index: 15;
}

/* 蜡烛样式 - 与PC端保持一致 */
.candle {
    background: linear-gradient(135deg, #8B0000 0%, #DC143C 50%, #8B0000 100%);
    width: 3px;
    height: 15px;
    border-radius: 1.5px / 0.5px;
    position: absolute;
    box-shadow:
        0 1px 3px rgba(0,0,0,0.4),
        inset 0.3px 0 0.5px rgba(255,255,255,0.3),
        inset -0.3px 0 0.5px rgba(0,0,0,0.4);
    z-index: 20;
    transform: translateX(-50%);
}

.candle::before {
    content: "";
    position: absolute;
    top: -0.5px;
    left: 0;
    width: 3px;
    height: 1px;
    border-radius: 50%;
    background: linear-gradient(135deg, #DC143C 0%, #FF1493 100%);
    box-shadow: 0 0.5px 1px rgba(0,0,0,0.4);
}

.candle .flame {
    position: absolute;
    background: radial-gradient(ellipse at center bottom, #ff4500 0%, #ff8c00 30%, #ffd700 70%, #ffff99 100%);
    width: 4px;
    height: 8px;
    border-radius: 2px 2px 2px 2px / 4px 4px 2px 2px;
    top: -8px;
    left: 50%;
    margin-left: -2px;
    z-index: 25;
    box-shadow:
        0 0 4px rgba(255, 69, 0, 0.9),
        0 0 8px rgba(255, 140, 0, 0.7),
        0 0 12px rgba(255, 215, 0, 0.5);
    transform-origin: 50% 90%;
    animation: flicker 0.8s ease-in-out alternate infinite;
    transition: opacity 0.5s ease;
}

.candle .flame.out {
    opacity: 0;
    transform: scale(0.1);
}

@keyframes flicker {
    0% {
        transform: skewX(3deg);
        box-shadow:
            0 0 6px rgba(255, 102, 0, 0.4),
            0 0 12px rgba(255, 153, 0, 0.3),
            0 0 24px rgba(255, 204, 0, 0.2);
    }
    25% {
        transform: skewX(-3deg);
        box-shadow:
            0 0 6px rgba(255, 102, 0, 0.8),
            0 0 12px rgba(255, 153, 0, 0.6),
            0 0 24px rgba(255, 204, 0, 0.4);
    }
    50% {
        transform: skewX(6deg);
        box-shadow:
            0 0 6px rgba(255, 102, 0, 0.6),
            0 0 12px rgba(255, 153, 0, 0.4),
            0 0 24px rgba(255, 204, 0, 0.3);
    }
    75% {
        transform: skewX(-6deg);
        box-shadow:
            0 0 6px rgba(255, 102, 0, 0.7),
            0 0 12px rgba(255, 153, 0, 0.5),
            0 0 24px rgba(255, 204, 0, 0.3);
    }
    100% {
        transform: skewX(3deg);
        box-shadow:
            0 0 6px rgba(255, 102, 0, 0.8),
            0 0 12px rgba(255, 153, 0, 0.6),
            0 0 24px rgba(255, 204, 0, 0.4);
    }
}

/* 蛋糕文字装饰 */
.cake-text {
    position: absolute;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    font-weight: 700;
    text-shadow:
        1px 1px 2px rgba(0,0,0,0.4),
        0 0 8px rgba(214, 51, 132, 0.6),
        0 0 12px rgba(214, 51, 132, 0.3);
    z-index: 15;
    letter-spacing: 0.5px;
    animation: textGlow 3s ease-in-out infinite alternate;
    background: linear-gradient(135deg, #d63384 0%, #e91e63 50%, #d63384 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

@keyframes textGlow {
    0% {
        text-shadow:
            1px 1px 2px rgba(0,0,0,0.4),
            0 0 8px rgba(214, 51, 132, 0.6),
            0 0 12px rgba(214, 51, 132, 0.3);
    }
    100% {
        text-shadow:
            1px 1px 2px rgba(0,0,0,0.4),
            0 0 12px rgba(214, 51, 132, 0.8),
            0 0 20px rgba(214, 51, 132, 0.5);
    }
}

.cake-buttons {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 0.8rem;
}

.cake-buttons button {
    background: linear-gradient(135deg, #d63384 0%, #e91e63 50%, #ff6b9d 100%);
    color: white;
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow:
        0 4px 15px rgba(214, 51, 132, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    min-height: 44px;
    flex: 1;
    max-width: 120px;
}

.cake-buttons button::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 0.5s;
}

.cake-buttons button:hover::before {
    left: 100%;
}

.cake-buttons button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow:
        0 6px 20px rgba(214, 51, 132, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.cake-buttons button:active {
    transform: translateY(-1px) scale(1.02);
}

/* 按钮波纹效果 */
.cake-buttons button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.cake-buttons button:active::after {
    width: 200px;
    height: 200px;
}

/* 音乐控制 */
.music-control {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

#musicToggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    padding: 0;
}

/* 简化动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    animation: fadeIn 0.6s ease forwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }

/* 移除复杂背景效果 */
.background-effects,
.floating-hearts,
.bubbles,
.stars,
.ribbons,
.glow-orbs {
    display: none;
}