/* ========================================
   AI Daily - 样式表
   8种智能主题配色
   ======================================== */

/* CSS 变量 - 8种主题 */
:root {
    --bg-color: #000000;
    --title-color: #FFFFFF;
}

/* 1. 柔和蓝色主题 */
body[data-theme="blue"] {
    --glow-start: #0A1929;
    --glow-end: #1A3A52;
    --text-color: #E3F2FD;
    --accent-color: #42A5F5;
    --secondary-color: #B0BEC5;
}

/* 2. 深靛蓝主题 */
body[data-theme="indigo"] {
    --glow-start: #0F1C3F;
    --glow-end: #1A2F5A;
    --text-color: #E3F2FD;
    --accent-color: #5C9FE5;
    --secondary-color: #BBDEFB;
}

/* 3. 优雅紫色主题 */
body[data-theme="purple"] {
    --glow-start: #1A0A28;
    --glow-end: #2D1B3D;
    --text-color: #F3E5F5;
    --accent-color: #B39DDB;
    --secondary-color: #D1C4E9;
}

/* 4. 清新绿色主题 */
body[data-theme="green"] {
    --glow-start: #0D1F12;
    --glow-end: #1B3A26;
    --text-color: #E8F5E9;
    --accent-color: #66BB6A;
    --secondary-color: #C8E6C9;
}

/* 5. 温暖橙色主题 */
body[data-theme="orange"] {
    --glow-start: #1F1410;
    --glow-end: #3D2415;
    --text-color: #FFF3E0;
    --accent-color: #FFA726;
    --secondary-color: #FFCCBC;
}

/* 6. 玫瑰粉色主题 */
body[data-theme="pink"] {
    --glow-start: #1F0A14;
    --glow-end: #3D1528;
    --text-color: #FCE4EC;
    --accent-color: #F06292;
    --secondary-color: #F8BBD0;
}

/* 7. 冷色青绿主题 */
body[data-theme="teal"] {
    --glow-start: #0A1F1F;
    --glow-end: #164E4D;
    --text-color: #E0F2F1;
    --accent-color: #26A69A;
    --secondary-color: #B2DFDB;
}

/* 8. 中性灰色主题 */
body[data-theme="gray"] {
    --glow-start: #1A1A1D;
    --glow-end: #2D2D30;
    --text-color: #F5F5F5;
    --accent-color: #9E9E9E;
    --secondary-color: #E0E0E0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 背景光晕 */
.background-glow {
    position: fixed;
    bottom: -20%;
    right: -20%;
    width: 70%;
    height: 70%;
    background: radial-gradient(
        circle at center,
        var(--glow-end) 0%,
        var(--glow-start) 40%,
        transparent 80%
    );
    opacity: 0.6;
    filter: blur(80px);
    z-index: -2;
    pointer-events: none;
}

/* 几何线条 */
.geometric-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(90deg, transparent 49%, var(--accent-color) 50%, transparent 51%),
        linear-gradient(0deg, transparent 49%, var(--accent-color) 50%, transparent 51%);
    background-size: 200px 200px;
    opacity: 0.08;
    z-index: -1;
    pointer-events: none;
}

/* ========================================
   布局容器
   ======================================== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: 100vh;
}

/* ========================================
   页头
   ======================================== */
.header {
    text-align: center;
    margin-bottom: 60px;
}

.header-center {
    margin-bottom: 80px;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--accent-color);
    border-radius: 16px;
    font-size: 32px;
    margin-bottom: 20px;
    box-shadow: 0 0 40px var(--accent-color), 0 0 80px var(--accent-color);
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 40px var(--accent-color), 0 0 80px var(--accent-color);
    }
    50% {
        opacity: 0.9;
        box-shadow: 0 0 50px var(--accent-color), 0 0 100px var(--accent-color);
    }
}

.header h1 {
    font-size: 48px;
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 18px;
    color: var(--secondary-color);
    opacity: 0.8;
}

.date-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 14px;
    color: var(--secondary-color);
    backdrop-filter: blur(10px);
}

/* ========================================
   主内容区
   ======================================== */
.main-content {
    max-width: 700px;
    margin: 0 auto;
}

.index-page {
    max-width: 800px;
}

/* ========================================
   章节标题
   ======================================== */
.section-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--title-color);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ========================================
   核心摘要卡片
   ======================================== */
.summary-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 28px;
    margin-bottom: 48px;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-list {
    list-style: none;
}

.summary-item {
    font-size: 16px;
    line-height: 1.8;
    padding: 12px 0;
    padding-left: 24px;
    position: relative;
}

.summary-item::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 20px;
}

.summary-item:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========================================
   分类区块
   ======================================== */
.category-section {
    margin-bottom: 56px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.category-icon {
    font-size: 32px;
}

.category-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--title-color);
    flex: 1;
}

.category-count {
    padding: 4px 12px;
    background: var(--accent-color);
    color: #000;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
}

/* ========================================
   资讯卡片网格
   ======================================== */
.news-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
}

.news-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.news-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 12px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--title-color);
    flex: 1;
}

.item-link {
    padding: 6px 16px;
    background: var(--accent-color);
    color: #000;
    text-decoration: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.item-link:hover {
    opacity: 0.8;
}

.news-summary {
    color: var(--text-color);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    font-size: 12px;
    color: var(--secondary-color);
}

/* ========================================
   关键词页脚
   ======================================== */
.keywords-footer {
    text-align: center;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
}

.keywords-footer p {
    color: var(--secondary-color);
    font-size: 14px;
}

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

.empty-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.empty-state h2 {
    font-size: 24px;
    color: var(--title-color);
    margin-bottom: 16px;
}

.empty-state p {
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.btn-primary {
    display: inline-block;
    margin-top: 24px;
    padding: 12px 32px;
    background: var(--accent-color);
    color: #000;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
}

/* ========================================
   索引页
   ======================================== */
.index-section {
    margin-bottom: 40px;
}

.index-entries {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.index-entry {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
}

.index-entry:hover {
    border-color: var(--accent-color);
    transform: translateX(4px);
}

.entry-link {
    display: block;
    padding: 20px 24px;
    text-decoration: none;
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.entry-date {
    font-size: 16px;
    font-weight: 600;
    color: var(--title-color);
}

.entry-arrow {
    font-size: 20px;
    color: var(--accent-color);
}

.entry-summary {
    color: var(--secondary-color);
    font-size: 14px;
}

.empty-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--secondary-color);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
}

.footer p {
    color: var(--secondary-color);
    font-size: 14px;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 768px) {
    .container {
        padding: 24px 16px;
    }

    .header h1 {
        font-size: 32px;
    }

    .logo-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }

    .section-title {
        font-size: 20px;
    }

    .category-title {
        font-size: 22px;
    }

    .news-card-header {
        flex-direction: column;
    }

    .item-link {
        align-self: flex-start;
    }

    .background-glow {
        width: 100%;
        height: 50%;
        bottom: -10%;
        right: -10%;
    }
}

@media (max-width: 480px) {
    .summary-card {
        padding: 20px;
    }

    .news-card {
        padding: 16px;
    }

    .date-badge {
        font-size: 12px;
        padding: 6px 14px;
    }
}