/* Homepage Styles */

/* Hero Section */
.hero {
    position: relative;
    height: var(--hero-height);
    min-height: var(--hero-min-height);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
    background-color: var(--color-bg-surface-alt);
}

.hero__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    /* 对所有背景图始终运行 Ken Burns，切换时不重置动画，消除突兀感 */
    animation: hero-kenburns 22s ease-in-out infinite;
    z-index: 0;
    opacity: 0;
    transition: opacity 1.4s ease-in-out;
    will-change: opacity;
}

/* 错开各张图的动画相位，让每张入场时都有自然的缩放节奏 */
.hero__bg:nth-child(1) { animation-delay:   0s; }
.hero__bg:nth-child(2) { animation-delay:  -5s; }
.hero__bg:nth-child(3) { animation-delay: -10s; }
.hero__bg:nth-child(4) { animation-delay: -15s; }
.hero__bg:nth-child(5) { animation-delay:  -3s; }

.hero__bg.active { opacity: 1; }

.hero__overlay {
    position: absolute;
    inset: 0;
    /* 多层遮罩：底部加权（文字区域）+ 左侧渐变 + 顶部轻遮 */
    background:
        radial-gradient(var(--hero-overlay-spot-size-x) var(--hero-overlay-spot-size-y) at var(--hero-overlay-spot-x) var(--hero-overlay-spot-y),
            rgba(var(--hero-overlay-spot-rgb), var(--hero-overlay-spot-alpha)), transparent 60%),
        linear-gradient(to top,
            rgba(var(--hero-overlay-dark-rgb), var(--hero-overlay-end-alpha))   0%,
            rgba(var(--hero-overlay-dark-rgb), var(--hero-overlay-mid-alpha))  30%,
            rgba(var(--hero-overlay-dark-rgb), var(--hero-overlay-start-alpha)) 65%,
            rgba(var(--hero-overlay-dark-rgb), 0.15) 100%),
        linear-gradient(to right,
            rgba(var(--hero-overlay-dark-rgb), 0.45) 0%,
            transparent 55%);
    z-index: 1;
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: left;
    color: var(--hero-text-color);
    text-shadow: var(--hero-text-shadow);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding-top: var(--header-height);
}

.hero__content.container {
    margin-top: 0;
}

.hero__title {
    font-family: "Playfair Display", "Noto Serif SC", "Songti SC", serif;
    font-size: clamp(2.75rem, 6vw, 4.75rem);
    font-weight: 700;
    margin-bottom: 0;
    letter-spacing: 0.02em;
    max-width: var(--hero-title-max-width);
    /* 入场动画由 .is-entering 触发 */
}

.hero__title.is-entering {
    animation: hero-text-enter 0.75s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero__subtitle {
    font-family: "Space Grotesk", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    font-size: clamp(1.1rem, 2.2vw, 1.5rem);
    opacity: 0.85;
    margin-bottom: var(--spacing-md);
    min-height: 1.8rem;
    max-width: var(--hero-subtitle-max-width);
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: var(--hero-text-color);
    border: none;
    box-shadow: var(--hero-button-shadow);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-hover), var(--hero-button-hover-bg));
    color: var(--hero-text-color);
    transform: translateY(-2px) scale(1.01);
}

/* ---- 幻灯片指示器（胶囊形，取代细线进度条）---- */
.hero__indicators {
    position: absolute;
    bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 7px;
    align-items: center;
    z-index: 3;
    /* 开启点击，按需扩大点击目标区域 */
    pointer-events: auto;
    padding: 10px 6px;
}

.hero__indicator {
    height: 4px;
    width: 6px;
    border-radius: 2px;
    background: var(--hero-progress-bg);
    transition: width 0.45s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.45s ease,
                opacity 0.3s ease;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    cursor: pointer;
    /* 扩大可点击区域，不影响视觉 */
}

.hero__indicator:hover:not(.is-active) {
    background: rgba(255, 255, 255, 0.5);
    width: 10px;
}

.hero__indicator.is-active {
    width: 28px;
    background: rgba(255, 255, 255, 0.3);
    cursor: default;
}

.hero__indicator.is-active::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--hero-progress-fill);
    transform: scaleX(0);
    transform-origin: left;
}

.hero__indicator.is-animating::after {
    animation: hero-dot-fill var(--hero-progress-duration, 5000ms) linear forwards;
}

/* 鼠标悬停时暂停填充动画 */
.hero__indicators:hover .hero__indicator.is-animating::after {
    animation-play-state: paused;
}

/* ---- 图片说明文字（左下角） ---- */
.hero__caption {
    position: absolute;
    bottom: calc(var(--spacing-lg) * 2.2 + env(safe-area-inset-bottom));
    left: var(--spacing-md);
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    z-index: 3;
    pointer-events: none;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
    transition: opacity 0.6s ease;
    max-width: 40vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    opacity: 0;
}

.hero__caption.has-text {
    opacity: 1;
}

/* Page Layout */
.page-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 992px) {
    .page-layout {
        grid-template-columns: 3fr 1fr;
    }
}

/* Article List */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-main);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px; /* Adjust based on padding of section-header */
    left: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
}

.section-more {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.article-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Sidebar Widgets moved to _widget.css */
.avatar--lg {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto;
    object-fit: cover;
    border: 3px solid var(--color-bg-surface-alt);
}

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

.social-links a {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
}

.social-links a:hover {
    color: var(--color-primary);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag-cloud .tag--active {
    background-color: var(--color-primary);
    color: #fff;
}

/* Daily Briefing / Today News */
.daily-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.daily-date__day {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.daily-date__sub {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tag--success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.daily-weather {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: right;
}

.daily-weather__icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.daily-weather__temp {
    font-weight: 700;
    color: var(--color-text-main);
}

.daily-weather__location {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* PC Sidebar Optimization for Daily News */
@media (min-width: 992px) {
    .daily-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .daily-date {
        width: 100%;
        padding-bottom: var(--spacing-sm);
        border-bottom: 1px dashed var(--color-border);
    }

    .daily-weather {
        width: 100%;
        text-align: left;
        justify-content: flex-start;
    }

    .daily-weather__temp {
        font-size: 1.1em;
    }
}

/* News List */
.list-unstyled {
    list-style: none;
}

.news-list__item {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px dashed var(--color-bg-surface-alt);
}

.news-list__item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.news-list__link {
    display: block;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.news-list__link:hover {
    color: var(--color-primary);
}

.history-list__item {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    display: flex;
    gap: var(--spacing-sm);
}

.history-list__item::before {
    content: '•';
    color: var(--color-primary);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .hero {
        height: var(--hero-mobile-height);
        min-height: var(--hero-mobile-min-height);
    }

    .hero__content {
        text-align: center;
        align-items: center;
    }

    .hero__title {
        letter-spacing: 0;
        text-align: center;
    }

    .hero__subtitle {
        text-align: center;
    }

    .hero__indicators {
        bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
    }

    .hero__caption {
        bottom: calc(var(--spacing-md) * 2.5 + env(safe-area-inset-bottom));
        left: var(--spacing-sm);
        max-width: 60vw;
    }
    
    .section-header {
        margin-bottom: var(--spacing-md);
        padding-bottom: var(--spacing-xs);
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .page-layout {
        gap: var(--spacing-lg);
    }
}

/* Solar Term Component (BEM) */
.solar-term {
    --term-bg-start: var(--color-primary);
    --term-bg-end: var(--color-primary-hover);
    
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.5;
    color: #ffffff;
    background: linear-gradient(135deg, var(--term-bg-start), var(--term-bg-end));
    border-radius: 9999px; /* Pill shape */
    box-shadow: 0 2px 4px var(--color-shadow);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast);
    cursor: default;
    user-select: none;
    vertical-align: middle;
}

.solar-term:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
    filter: brightness(1.1);
}

@media (prefers-color-scheme: dark) {
    .solar-term {
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    }
    .solar-term:hover {
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    }
}

@keyframes hero-kenburns {
    0%   { transform: scale(1.04) translate3d(0,     0,    0); }
    33%  { transform: scale(1.08) translate3d(-0.8%, -0.6%, 0); }
    66%  { transform: scale(1.06) translate3d( 0.5%, -0.3%, 0); }
    100% { transform: scale(1.04) translate3d(0,     0,    0); }
}

@keyframes hero-text-enter {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes hero-dot-fill {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}