/* ===== 首页 Header ===== */
.site-header {
    position: relative;
    padding: 50px 20px 30px;
    text-align: center;
    z-index: 1;
}

.site-header h1 {
    font-size: 2.6rem;
    font-weight: 300;
    letter-spacing: 6px;
    background: var(--primary-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    text-shadow: none;
}

.site-header .subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.site-header .hearts-divider {
    margin-top: 16px;
    font-size: 0.7rem;
    color: var(--primary-light);
    letter-spacing: 8px;
    opacity: 0.5;
}

/* ===== 纪念日卡片 ===== */
.countdown-section {
    padding: 0 20px;
    margin-bottom: 36px;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.countdown-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 28px 36px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.35);
    width: 100%;
    max-width: 520px;
    position: relative;
    overflow: hidden;
}

.countdown-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-grad);
}

.countdown-card .label {
    font-size: 0.88rem;
    color: var(--text-light);
    margin-bottom: 14px;
    font-weight: 500;
    letter-spacing: 1px;
}

.countdown-card .label i {
    color: var(--primary);
    animation: heartbeat 1.5s ease-in-out infinite;
}

.countdown-main {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 8px;
}

.countdown-main .days {
    font-size: 4rem;
    font-weight: 700;
    background: var(--primary-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.countdown-main .unit {
    font-size: 1.2rem;
    color: var(--text-light);
    font-weight: 500;
}

.countdown-detail {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
    padding-top: 14px;
    border-top: 1px solid rgba(200, 160, 180, 0.1);
}

.countdown-detail .detail-item {
    text-align: center;
}

.countdown-detail .detail-num {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.countdown-detail .detail-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 里程碑标签 */
.milestone-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(255,107,138,0.1), rgba(196,113,237,0.1));
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
}

/* ===== 时间轴 ===== */
.timeline-container {
    padding: 0 20px;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    padding-bottom: 120px;
}

/* 中间竖线 */
.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 80px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-light), rgba(255,154,158,0.1));
    transform: translateX(-50%);
}

/* 时间节点 */
.timeline-item {
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    gap: 0;
    margin-bottom: 44px;
    align-items: start;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) .item-content {
    grid-column: 1;
    text-align: right;
    padding-right: 24px;
}

.timeline-item:nth-child(odd) .item-dot {
    grid-column: 2;
}

.timeline-item:nth-child(odd) .item-image {
    grid-column: 3;
    padding-left: 24px;
}

.timeline-item:nth-child(even) .item-content {
    grid-column: 3;
    text-align: left;
    padding-left: 24px;
}

.timeline-item:nth-child(even) .item-dot {
    grid-column: 2;
    grid-row: 1;
}

.timeline-item:nth-child(even) .item-image {
    grid-column: 1;
    grid-row: 1;
    padding-right: 24px;
}

/* 中间圆点 */
.item-dot {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 28px;
}

.dot-inner {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-grad);
    box-shadow: 0 0 0 4px rgba(255, 107, 138, 0.15), 0 0 0 8px rgba(255, 107, 138, 0.06);
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.timeline-item:hover .dot-inner {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px rgba(255, 107, 138, 0.2), 0 0 0 12px rgba(255, 107, 138, 0.08);
}

/* 左侧/右侧内容卡片 */
.item-content .card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.item-content .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.card-date {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.82rem;
    letter-spacing: 0.5px;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

.card-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-location {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: rgba(255, 107, 138, 0.06);
    border-radius: 50px;
}

.card-location i {
    color: var(--primary-light);
    font-size: 0.7rem;
}

/* 右侧图片 */
.item-image .image-wrapper {
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: linear-gradient(135deg, #fef0f2, #fdf2f8);
    border: 1px solid rgba(255, 255, 255, 0.35);
    cursor: zoom-in;
    position: relative;
}

.item-image .image-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.03));
    pointer-events: none;
}

.item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: block;
}

.timeline-item:hover .item-image img {
    transform: scale(1.06);
}

/* 图片占位 */
.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.image-placeholder i {
    font-size: 2rem;
    opacity: 0.3;
}

/* ===== 悬浮按钮 ===== */
.fab-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: var(--primary-grad);
    color: white;
    border: none;
    box-shadow: 0 6px 24px rgba(255, 107, 138, 0.4);
    cursor: pointer;
    font-size: 1.4rem;
    transition: var(--transition);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.fab-btn:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 8px 32px rgba(255, 107, 138, 0.55);
}

.fab-btn:active {
    transform: scale(1) rotate(90deg);
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    opacity: 0.25;
    animation: heartbeat 2s ease-in-out infinite;
}

.empty-state p {
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.empty-state .hint {
    font-size: 0.82rem;
    opacity: 0.7;
}

/* ===== 页脚 ===== */
.site-footer {
    text-align: center;
    padding: 40px 20px 30px;
    color: var(--text-muted);
    font-size: 0.78rem;
    position: relative;
    z-index: 1;
}

.site-footer .footer-heart {
    color: var(--primary-light);
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .site-header h1 {
        font-size: 1.8rem;
        letter-spacing: 3px;
    }

    .countdown-card {
        padding: 22px 20px;
    }

    .countdown-main .days {
        font-size: 3rem;
    }

    .countdown-detail {
        gap: 14px;
    }

    .countdown-detail .detail-num {
        font-size: 1.1rem;
    }

    /* 移动端：全部单列 */
    .timeline-container::before {
        left: 24px;
    }

    .timeline-item {
        grid-template-columns: 48px 1fr;
        gap: 0;
    }

    .timeline-item .item-dot {
        grid-column: 1 !important;
        grid-row: 1 !important;
        padding-top: 24px;
    }

    .timeline-item .item-content {
        grid-column: 2 !important;
        grid-row: 1 !important;
        text-align: left !important;
        padding: 0 !important;
        padding-left: 12px !important;
    }

    .timeline-item .item-image {
        grid-column: 2 !important;
        grid-row: 2 !important;
        padding: 12px 0 0 12px !important;
    }

    .item-image .image-wrapper {
        height: 200px !important;
    }

    .music-player {
        bottom: 100px;
        right: 16px;
    }

    .music-panel {
        right: -10px;
        width: 260px;
    }

    .fab-btn {
        bottom: 24px;
        right: 20px;
        width: 52px;
        height: 52px;
    }
}

@media (max-width: 400px) {
    .countdown-main .days {
        font-size: 2.4rem;
    }

    .countdown-detail {
        gap: 10px;
    }
}