/* lib/all.css - 冰凌呀小栈 公共样式库 */
:root {
    --sakura-pink: #FADADD;
    --sakura-mid: #F4B8C1;
    --sakura-deep: #E88D9B;
    --lavender: #E8D5F5;
    --lavender-deep: #C9A9E0;
    --sky-blue: #D4EAF7;
    --sky-deep: #A3C9E0;
    --mint-green: #D4F0E0;
    --mint-deep: #A3D9B8;
    --peach: #FDE4D0;
    --peach-deep: #F5C9A0;
    --white-soft: #FFFAFB;
    --white-card: rgba(255, 255, 255, 0.75);
    --white-card-hover: rgba(255, 255, 255, 0.92);
    --text-primary: #4A3F4A;
    --text-secondary: #7A6F7A;
    --text-light: #A89DA8;
    --shadow-soft: 0 4px 20px rgba(200, 160, 180, 0.18);
    --shadow-card: 0 8px 32px rgba(180, 140, 160, 0.14);
    --shadow-hover: 0 14px 40px rgba(180, 140, 160, 0.22);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
    font-size: clamp(1rem, 2vw, 1.1rem);
}

body {
    font-family: 'Quicksand', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(170deg, #FDE8EC 0%, #FDF2F8 15%, #F8F0F8 30%, #F0F0FA 50%, #F0F6FA 70%, #F5F0F8 85%, #FDE8EC 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 背景装饰 */
.bg-decoration {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

.bg-circle-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(248, 200, 210, 0.25) 0%, transparent 70%);
    top: -100px;
    right: -80px;
    border-radius: 50%;
    animation: floatSlow 12s ease-in-out infinite;
}

.bg-circle-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(200, 180, 220, 0.2) 0%, transparent 70%);
    bottom: -60px;
    left: -90px;
    border-radius: 50%;
    animation: floatSlow 15s ease-in-out infinite reverse;
}

.bg-circle-3 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(180, 210, 230, 0.22) 0%, transparent 70%);
    top: 50%;
    left: 60%;
    border-radius: 50%;
    animation: floatSlow 10s ease-in-out infinite;
}

@keyframes floatSlow {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(18px, -20px) scale(1.04);
    }

    66% {
        transform: translate(-14px, 14px) scale(0.97);
    }
}

/* 樱花 */
.sakura-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.sakura-petal {
    position: absolute;
    top: -60px;
    opacity: 0.55;
    animation: sakuraFall linear infinite;
    font-size: 1.4rem;
}

@keyframes sakuraFall {
    0% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0.6;
    }

    25% {
        transform: translateY(25vh) translateX(40px) rotate(90deg);
        opacity: 0.5;
    }

    50% {
        transform: translateY(50vh) translateX(-30px) rotate(180deg);
        opacity: 0.35;
    }

    75% {
        transform: translateY(75vh) translateX(25px) rotate(270deg);
        opacity: 0.2;
    }

    100% {
        transform: translateY(105vh) translateX(-15px) rotate(360deg);
        opacity: 0;
    }
}

/* 容器 */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* 导航栏 */
.navbar {
    position: sticky;
    top: 16px;
    z-index: 1000;
    margin: 16px auto 0;
    max-width: 1100px;
    padding: 0 24px;
}

.navbar-inner {
    background: var(--white-card);
    backdrop-filter: blur(16px) saturate(1.4);
    border: 1px solid rgba(255, 220, 230, 0.5);
    border-radius: var(--radius-xl);
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.navbar-inner:hover {
    box-shadow: var(--shadow-card);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-brand .brand-icon {
    font-size: 1.6rem;
    animation: bounceGentle 2s ease-in-out infinite;
}

@keyframes bounceGentle {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--sakura-deep);
    background: rgba(250, 218, 221, 0.4);
}

.nav-links a i {
    margin-right: 5px;
    font-size: 0.85rem;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: var(--transition);
}

.hamburger:hover {
    background: rgba(250, 218, 221, 0.3);
}

/* 卡片公共样式 */
.card {
    background: var(--white-card);
    backdrop-filter: blur(14px) saturate(1.3);
    border: 1px solid rgba(240, 215, 225, 0.5);
    border-radius: var(--radius-lg);
    padding: 26px 28px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    background: var(--white-card-hover);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 11px 24px;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #F4B8C1, #E88D9B);
    color: #fff;
    box-shadow: 0 4px 14px rgba(232, 141, 155, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(232, 141, 155, 0.4);
    transform: translateY(-2px);
}

.btn-secondary,
.btn-outline {
    background: var(--white-card);
    color: var(--text-secondary);
    border: 1px solid rgba(220, 200, 210, 0.5);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover,
.btn-outline:hover {
    background: var(--white-card-hover);
    color: var(--sakura-deep);
    border-color: var(--sakura-mid);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 40px 0 30px;
    color: var(--text-light);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

.footer .footer-heart {
    color: var(--sakura-deep);
    animation: heartbeat 1.5s ease-in-out infinite;
    display: inline-block;
}

@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    15% {
        transform: scale(1.2);
    }

    30% {
        transform: scale(1);
    }

    45% {
        transform: scale(1.15);
    }

    60% {
        transform: scale(1);
    }
}

.footer a {
    color: var(--sakura-deep);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    text-decoration: underline;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--white-card);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(230, 200, 210, 0.4);
    box-shadow: var(--shadow-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    color: var(--sakura-deep);
    box-shadow: var(--shadow-card);
    transform: translateY(-3px);
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar {
        padding: 0 12px;
        top: 8px;
        margin-top: 8px;
    }

    .navbar-inner {
        padding: 12px 18px;
        border-radius: var(--radius-lg);
    }

    /* 重置 ul 默认样式 */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 12px;
        right: 12px;
        flex-direction: column;
        background: var(--white-card-hover);
        backdrop-filter: blur(20px);
        border-radius: var(--radius-lg);
        padding: 12px 16px;
        box-shadow: var(--shadow-card);
        border: 1px solid rgba(240, 215, 225, 0.5);
        gap: 8px;
        margin: 0;
        /* 清除默认外边距 */
        list-style: none;
        /* 清除列表标记 */
    }

    

    .nav-links.open {
        display: flex;
    }

    /* 链接样式：块级、铺满、居中、无重叠 */
    .nav-links a {
        display: block;
        width: 100%;
        text-align: center;
        padding: 12px 0;
        border-radius: var(--radius-md);
        font-size: 1rem;
        font-weight: 500;
        background: transparent;
        transition: var(--transition);
        box-sizing: border-box;
    }

    /* 悬停效果独立，不影响其他项 */
    .nav-links a:hover {
        background: rgba(250, 218, 221, 0.5);
        color: var(--sakura-deep);
    }

    /* 激活状态 */
    .nav-links a.active {
        background: var(--sakura-pink);
        color: var(--sakura-deep);
    }

    .hamburger {
        display: block;
    }
}